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This commit was generated by cvs2svn to compensate for changes in r98675,

Browse Source 
which included commits to RCS files with non-trunk default branches.
This commit is contained in:
Dag-Erling Smørgrav 2002-06-23 14:01:54 +00:00
commit f6342a9bad
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=98676
69 changed files with 6635 additions and 690 deletions
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4
crypto/openssh/Makefile
View File

@ -1,9 +1,9 @@
# $OpenBSD: Makefile,v 1.10 2002/02/09 17:37:34 deraadt Exp $
# $OpenBSD: Makefile,v 1.11 2002/05/23 19:24:30 markus Exp $
.include <bsd.own.mk>
SUBDIR= lib ssh sshd ssh-add ssh-keygen ssh-agent scp sftp-server \
ssh-keyscan sftp scard
ssh-keysign ssh-keyscan sftp scard
distribution:
install -C -o root -g wheel -m 0644 ${.CURDIR}/ssh_config \

74
crypto/openssh/README.smartcard
View File

@ -4,52 +4,33 @@ OpenSSH contains experimental support for authentication using
Cyberflex smartcards and TODOS card readers. To enable this you
need to:
(1) install sectok
$ cd /usr/src/lib/libsectok
$ make obj depend all install includes
$ cd /usr/src/usr.bin/sectok
$ make obj depend all install
(2) enable SMARTCARD support in OpenSSH:
(1) enable SMARTCARD support in OpenSSH:
$ vi /usr/src/usr.bin/ssh/Makefile.inc
and uncomment
CFLAGS+= -DSMARTCARD
LDADD+= -lsectok
(3) load the Java Cardlet to the Cyberflex card:
(2) If you have used a previous version of ssh with your card, you
must remove the old applet and keys.
$ sectok
sectok> login -d
sectok> junload Ssh.bin
sectok> delete 0012
sectok> delete sh
sectok> quit
(3) load the Java Cardlet to the Cyberflex card and set card passphrase:
$ sectok
sectok> login -d
sectok> jload /usr/libdata/ssh/Ssh.bin
sectok> quit
(4) load a RSA key to the card:
please don't use your production RSA keys, since
with the current version of sectok/ssh-keygen
the private key file is still readable
$ ssh-keygen -f /path/to/rsakey -U 1
(where 1 is the reader number, you can also try 0)
In spite of the name, this does not generate a key.
It just loads an already existing key on to the card.
(5) optional:
Change the card password so that only you can
read the private key:
$ sectok
sectok> login -d
sectok> setpass
Enter new AUT0 passphrase:
Re-enter passphrase:
sectok> quit
This prevents reading the key but not use of the
key by the card applet.
Do not forget the passphrase. There is no way to
recover if you do.
@ -57,13 +38,36 @@ need to:
wrong passphrase three times in a row, you will
destroy your card.
(6) tell the ssh client to use the card reader:
(4) load a RSA key to the card:
$ ssh-keygen -f /path/to/rsakey -U 1
(where 1 is the reader number, you can also try 0)
In spite of the name, this does not generate a key.
It just loads an already existing key on to the card.
(5) tell the ssh client to use the card reader:
$ ssh -I 1 otherhost
(7) or tell the agent (don't forget to restart) to use the smartcard:
(6) or tell the agent (don't forget to restart) to use the smartcard:
$ ssh-add -s 1
(7) Optional: If you don't want to use a card passphrase, change the
acl on the private key file:
$ sectok
sectok> login -d
sectok> acl 0012 world: w
world: w
AUT0: w inval
sectok> quit
If you do this, anyone who has access to your card
can assume your identity. This is not recommended.
-markus,
Tue Jul 17 23:54:51 CEST 2001
$OpenBSD: README.smartcard,v 1.8 2002/03/26 18:56:23 rees Exp $

21
crypto/openssh/auth-bsdauth.c
View File

@ -22,12 +22,13 @@
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: auth-bsdauth.c,v 1.2 2001/12/19 07:18:56 deraadt Exp $");
RCSID("$OpenBSD: auth-bsdauth.c,v 1.4 2002/06/19 00:27:55 deraadt Exp $");
#ifdef BSD_AUTH
#include "xmalloc.h"
#include "auth.h"
#include "log.h"
#include "monitor_wrap.h"
static void *
bsdauth_init_ctx(Authctxt *authctxt)
@ -35,7 +36,7 @@ bsdauth_init_ctx(Authctxt *authctxt)
return authctxt;
}
static int
int
bsdauth_query(void *ctx, char **name, char **infotxt,
u_int *numprompts, char ***prompts, u_int **echo_on)
{
@ -56,7 +57,7 @@ bsdauth_query(void *ctx, char **name, char **infotxt,
debug3("bsdauth_query: style %s",
authctxt->style ? authctxt->style : "<default>");
authctxt->as = auth_userchallenge(authctxt->user,
authctxt->style, "auth-ssh", &challenge);
authctxt->style, "auth-ssh", &challenge);
if (authctxt->as == NULL)
challenge = NULL;
debug2("bsdauth_query: <%s>", challenge ? challenge : "empty");
@ -65,8 +66,8 @@ bsdauth_query(void *ctx, char **name, char **infotxt,
if (challenge == NULL)
return -1;
*name = xstrdup("");
*infotxt = xstrdup("");
*name = xstrdup("");
*infotxt = xstrdup("");
*numprompts = 1;
*prompts = xmalloc(*numprompts * sizeof(char*));
*echo_on = xmalloc(*numprompts * sizeof(u_int));
@ -76,7 +77,7 @@ bsdauth_query(void *ctx, char **name, char **infotxt,
return 0;
}
static int
int
bsdauth_respond(void *ctx, u_int numresponses, char **responses)
{
Authctxt *authctxt = ctx;
@ -113,4 +114,12 @@ KbdintDevice bsdauth_device = {
bsdauth_respond,
bsdauth_free_ctx
};
KbdintDevice mm_bsdauth_device = {
"bsdauth",
bsdauth_init_ctx,
mm_bsdauth_query,
mm_bsdauth_respond,
bsdauth_free_ctx
};
#endif

42
crypto/openssh/auth-options.c
View File

@ -10,7 +10,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: auth-options.c,v 1.21 2002/01/29 14:32:03 markus Exp $");
RCSID("$OpenBSD: auth-options.c,v 1.24 2002/05/13 20:44:58 markus Exp $");
#include "packet.h"
#include "xmalloc.h"
@ -20,7 +20,10 @@ RCSID("$OpenBSD: auth-options.c,v 1.21 2002/01/29 14:32:03 markus Exp $");
#include "channels.h"
#include "auth-options.h"
#include "servconf.h"
#include "bufaux.h"
#include "misc.h"
#include "monitor_wrap.h"
#include "auth.h"
/* Flags set authorized_keys flags */
int no_port_forwarding_flag = 0;
@ -54,6 +57,7 @@ auth_clear_options(void)
forced_command = NULL;
}
channel_clear_permitted_opens();
auth_debug_reset();
}
/*
@ -75,28 +79,28 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
while (*opts && *opts != ' ' && *opts != '\t') {
cp = "no-port-forwarding";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
packet_send_debug("Port forwarding disabled.");
auth_debug_add("Port forwarding disabled.");
no_port_forwarding_flag = 1;
opts += strlen(cp);
goto next_option;
}
cp = "no-agent-forwarding";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
packet_send_debug("Agent forwarding disabled.");
auth_debug_add("Agent forwarding disabled.");
no_agent_forwarding_flag = 1;
opts += strlen(cp);
goto next_option;
}
cp = "no-X11-forwarding";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
packet_send_debug("X11 forwarding disabled.");
auth_debug_add("X11 forwarding disabled.");
no_x11_forwarding_flag = 1;
opts += strlen(cp);
goto next_option;
}
cp = "no-pty";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
packet_send_debug("Pty allocation disabled.");
auth_debug_add("Pty allocation disabled.");
no_pty_flag = 1;
opts += strlen(cp);
goto next_option;
@ -119,14 +123,14 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
if (!*opts) {
debug("%.100s, line %lu: missing end quote",
file, linenum);
packet_send_debug("%.100s, line %lu: missing end quote",
auth_debug_add("%.100s, line %lu: missing end quote",
file, linenum);
xfree(forced_command);
forced_command = NULL;
goto bad_option;
}
forced_command[i] = 0;
packet_send_debug("Forced command: %.900s", forced_command);
auth_debug_add("Forced command: %.900s", forced_command);
opts++;
goto next_option;
}
@ -151,13 +155,13 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
if (!*opts) {
debug("%.100s, line %lu: missing end quote",
file, linenum);
packet_send_debug("%.100s, line %lu: missing end quote",
auth_debug_add("%.100s, line %lu: missing end quote",
file, linenum);
xfree(s);
goto bad_option;
}
s[i] = 0;
packet_send_debug("Adding to environment: %.900s", s);
auth_debug_add("Adding to environment: %.900s", s);
debug("Adding to environment: %.900s", s);
opts++;
new_envstring = xmalloc(sizeof(struct envstring));
@ -188,7 +192,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
if (!*opts) {
debug("%.100s, line %lu: missing end quote",
file, linenum);
packet_send_debug("%.100s, line %lu: missing end quote",
auth_debug_add("%.100s, line %lu: missing end quote",
file, linenum);
xfree(patterns);
goto bad_option;
@ -202,7 +206,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
"correct key but not from a permitted "
"host (host=%.200s, ip=%.200s).",
pw->pw_name, remote_host, remote_ip);
packet_send_debug("Your host '%.200s' is not "
auth_debug_add("Your host '%.200s' is not "
"permitted to use this key for login.",
remote_host);
/* deny access */
@ -233,7 +237,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
if (!*opts) {
debug("%.100s, line %lu: missing end quote",
file, linenum);
packet_send_debug("%.100s, line %lu: missing end quote",
auth_debug_add("%.100s, line %lu: missing end quote",
file, linenum);
xfree(patterns);
goto bad_option;
@ -244,7 +248,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
sscanf(patterns, "%255[^/]/%5[0-9]", host, sport) != 2) {
debug("%.100s, line %lu: Bad permitopen specification "
"<%.100s>", file, linenum, patterns);
packet_send_debug("%.100s, line %lu: "
auth_debug_add("%.100s, line %lu: "
"Bad permitopen specification", file, linenum);
xfree(patterns);
goto bad_option;
@ -252,7 +256,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
if ((port = a2port(sport)) == 0) {
debug("%.100s, line %lu: Bad permitopen port <%.100s>",
file, linenum, sport);
packet_send_debug("%.100s, line %lu: "
auth_debug_add("%.100s, line %lu: "
"Bad permitopen port", file, linenum);
xfree(patterns);
goto bad_option;
@ -276,14 +280,22 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
opts++;
/* Process the next option. */
}
if (!use_privsep)
auth_debug_send();
/* grant access */
return 1;
bad_option:
log("Bad options in %.100s file, line %lu: %.50s",
file, linenum, opts);
packet_send_debug("Bad options in %.100s file, line %lu: %.50s",
auth_debug_add("Bad options in %.100s file, line %lu: %.50s",
file, linenum, opts);
if (!use_privsep)
auth_debug_send();
/* deny access */
return 0;
}

68
crypto/openssh/auth-rhosts.c
View File

@ -14,7 +14,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: auth-rhosts.c,v 1.27 2002/03/04 12:43:06 markus Exp $");
RCSID("$OpenBSD: auth-rhosts.c,v 1.28 2002/05/13 21:26:49 markus Exp $");
#include "packet.h"
#include "uidswap.h"
@ -26,6 +26,7 @@ RCSID("$OpenBSD: auth-rhosts.c,v 1.27 2002/03/04 12:43:06 markus Exp $");
/* import */
extern ServerOptions options;
extern int use_privsep;
/*
* This function processes an rhosts-style file (.rhosts, .shosts, or
@ -69,7 +70,7 @@ check_rhosts_file(const char *filename, const char *hostname,
*/
switch (sscanf(buf, "%s %s %s", hostbuf, userbuf, dummy)) {
case 0:
packet_send_debug("Found empty line in %.100s.", filename);
auth_debug_add("Found empty line in %.100s.", filename);
continue;
case 1:
/* Host name only. */
@ -79,7 +80,7 @@ check_rhosts_file(const char *filename, const char *hostname,
/* Got both host and user name. */
break;
case 3:
packet_send_debug("Found garbage in %.100s.", filename);
auth_debug_add("Found garbage in %.100s.", filename);
continue;
default:
/* Weird... */
@ -106,8 +107,8 @@ check_rhosts_file(const char *filename, const char *hostname,
/* Check for empty host/user names (particularly '+'). */
if (!host[0] || !user[0]) {
/* We come here if either was '+' or '-'. */
packet_send_debug("Ignoring wild host/user names in %.100s.",
filename);
auth_debug_add("Ignoring wild host/user names in %.100s.",
filename);
continue;
}
/* Verify that host name matches. */
@ -130,8 +131,8 @@ check_rhosts_file(const char *filename, const char *hostname,
/* If the entry was negated, deny access. */
if (negated) {
packet_send_debug("Matched negative entry in %.100s.",
filename);
auth_debug_add("Matched negative entry in %.100s.",
filename);
return 0;
}
/* Accept authentication. */
@ -153,16 +154,14 @@ int
auth_rhosts(struct passwd *pw, const char *client_user)
{
const char *hostname, *ipaddr;
int ret;
hostname = get_canonical_hostname(options.verify_reverse_mapping);
ipaddr = get_remote_ipaddr();
ret = auth_rhosts2(pw, client_user, hostname, ipaddr);
return ret;
return auth_rhosts2(pw, client_user, hostname, ipaddr);
}
int
auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
static int
auth_rhosts2_raw(struct passwd *pw, const char *client_user, const char *hostname,
const char *ipaddr)
{
char buf[1024];
@ -205,13 +204,13 @@ auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
if (pw->pw_uid != 0) {
if (check_rhosts_file(_PATH_RHOSTS_EQUIV, hostname, ipaddr,
client_user, pw->pw_name)) {
packet_send_debug("Accepted for %.100s [%.100s] by /etc/hosts.equiv.",
auth_debug_add("Accepted for %.100s [%.100s] by /etc/hosts.equiv.",
hostname, ipaddr);
return 1;
}
if (check_rhosts_file(_PATH_SSH_HOSTS_EQUIV, hostname, ipaddr,
client_user, pw->pw_name)) {
packet_send_debug("Accepted for %.100s [%.100s] by %.100s.",
auth_debug_add("Accepted for %.100s [%.100s] by %.100s.",
hostname, ipaddr, _PATH_SSH_HOSTS_EQUIV);
return 1;
}
@ -221,19 +220,19 @@ auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
* not group or world writable.
*/
if (stat(pw->pw_dir, &st) < 0) {
log("Rhosts authentication refused for %.100s: no home directory %.200s",
pw->pw_name, pw->pw_dir);
packet_send_debug("Rhosts authentication refused for %.100s: no home directory %.200s",
pw->pw_name, pw->pw_dir);
log("Rhosts authentication refused for %.100s: "
"no home directory %.200s", pw->pw_name, pw->pw_dir);
auth_debug_add("Rhosts authentication refused for %.100s: "
"no home directory %.200s", pw->pw_name, pw->pw_dir);
return 0;
}
if (options.strict_modes &&
((st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
(st.st_mode & 022) != 0)) {
log("Rhosts authentication refused for %.100s: bad ownership or modes for home directory.",
pw->pw_name);
packet_send_debug("Rhosts authentication refused for %.100s: bad ownership or modes for home directory.",
pw->pw_name);
log("Rhosts authentication refused for %.100s: "
"bad ownership or modes for home directory.", pw->pw_name);
auth_debug_add("Rhosts authentication refused for %.100s: "
"bad ownership or modes for home directory.", pw->pw_name);
return 0;
}
/* Temporarily use the user's uid. */
@ -259,21 +258,23 @@ auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
(st.st_mode & 022) != 0)) {
log("Rhosts authentication refused for %.100s: bad modes for %.200s",
pw->pw_name, buf);
packet_send_debug("Bad file modes for %.200s", buf);
auth_debug_add("Bad file modes for %.200s", buf);
continue;
}
/* Check if we have been configured to ignore .rhosts and .shosts files. */
if (options.ignore_rhosts) {
packet_send_debug("Server has been configured to ignore %.100s.",
rhosts_files[rhosts_file_index]);
auth_debug_add("Server has been configured to ignore %.100s.",
rhosts_files[rhosts_file_index]);
continue;
}
/* Check if authentication is permitted by the file. */
if (check_rhosts_file(buf, hostname, ipaddr, client_user, pw->pw_name)) {
packet_send_debug("Accepted by %.100s.",
rhosts_files[rhosts_file_index]);
auth_debug_add("Accepted by %.100s.",
rhosts_files[rhosts_file_index]);
/* Restore the privileged uid. */
restore_uid();
auth_debug_add("Accepted host %s ip %s client_user %s server_user %s",
hostname, ipaddr, client_user, pw->pw_name);
return 1;
}
}
@ -282,3 +283,16 @@ auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
restore_uid();
return 0;
}
int
auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
const char *ipaddr)
{
int ret;
auth_debug_reset();
ret = auth_rhosts2_raw(pw, client_user, hostname, ipaddr);
if (!use_privsep)
auth_debug_send();
return ret;
}

182
crypto/openssh/auth2-hostbased.c Normal file
View File

@ -0,0 +1,182 @@
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: auth2-hostbased.c,v 1.2 2002/05/31 11:35:15 markus Exp $");
#include "ssh2.h"
#include "xmalloc.h"
#include "packet.h"
#include "buffer.h"
#include "log.h"
#include "servconf.h"
#include "compat.h"
#include "bufaux.h"
#include "auth.h"
#include "key.h"
#include "canohost.h"
#include "monitor_wrap.h"
#include "pathnames.h"
/* import */
extern ServerOptions options;
extern u_char *session_id2;
extern int session_id2_len;
static int
userauth_hostbased(Authctxt *authctxt)
{
Buffer b;
Key *key = NULL;
char *pkalg, *cuser, *chost, *service;
u_char *pkblob, *sig;
u_int alen, blen, slen;
int pktype;
int authenticated = 0;
if (!authctxt->valid) {
debug2("userauth_hostbased: disabled because of invalid user");
return 0;
}
pkalg = packet_get_string(&alen);
pkblob = packet_get_string(&blen);
chost = packet_get_string(NULL);
cuser = packet_get_string(NULL);
sig = packet_get_string(&slen);
debug("userauth_hostbased: cuser %s chost %s pkalg %s slen %d",
cuser, chost, pkalg, slen);
#ifdef DEBUG_PK
debug("signature:");
buffer_init(&b);
buffer_append(&b, sig, slen);
buffer_dump(&b);
buffer_free(&b);
#endif
pktype = key_type_from_name(pkalg);
if (pktype == KEY_UNSPEC) {
/* this is perfectly legal */
log("userauth_hostbased: unsupported "
"public key algorithm: %s", pkalg);
goto done;
}
key = key_from_blob(pkblob, blen);
if (key == NULL) {
error("userauth_hostbased: cannot decode key: %s", pkalg);
goto done;
}
if (key->type != pktype) {
error("userauth_hostbased: type mismatch for decoded key "
"(received %d, expected %d)", key->type, pktype);
goto done;
}
service = datafellows & SSH_BUG_HBSERVICE ? "ssh-userauth" :
authctxt->service;
buffer_init(&b);
buffer_put_string(&b, session_id2, session_id2_len);
/* reconstruct packet */
buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
buffer_put_cstring(&b, authctxt->user);
buffer_put_cstring(&b, service);
buffer_put_cstring(&b, "hostbased");
buffer_put_string(&b, pkalg, alen);
buffer_put_string(&b, pkblob, blen);
buffer_put_cstring(&b, chost);
buffer_put_cstring(&b, cuser);
#ifdef DEBUG_PK
buffer_dump(&b);
#endif
/* test for allowed key and correct signature */
authenticated = 0;
if (PRIVSEP(hostbased_key_allowed(authctxt->pw, cuser, chost, key)) &&
PRIVSEP(key_verify(key, sig, slen, buffer_ptr(&b),
buffer_len(&b))) == 1)
authenticated = 1;
buffer_clear(&b);
done:
debug2("userauth_hostbased: authenticated %d", authenticated);
if (key != NULL)
key_free(key);
xfree(pkalg);
xfree(pkblob);
xfree(cuser);
xfree(chost);
xfree(sig);
return authenticated;
}
/* return 1 if given hostkey is allowed */
int
hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost,
Key *key)
{
const char *resolvedname, *ipaddr, *lookup;
HostStatus host_status;
int len;
resolvedname = get_canonical_hostname(options.verify_reverse_mapping);
ipaddr = get_remote_ipaddr();
debug2("userauth_hostbased: chost %s resolvedname %s ipaddr %s",
chost, resolvedname, ipaddr);
if (options.hostbased_uses_name_from_packet_only) {
if (auth_rhosts2(pw, cuser, chost, chost) == 0)
return 0;
lookup = chost;
} else {
if (((len = strlen(chost)) > 0) && chost[len - 1] == '.') {
debug2("stripping trailing dot from chost %s", chost);
chost[len - 1] = '\0';
}
if (strcasecmp(resolvedname, chost) != 0)
log("userauth_hostbased mismatch: "
"client sends %s, but we resolve %s to %s",
chost, ipaddr, resolvedname);
if (auth_rhosts2(pw, cuser, resolvedname, ipaddr) == 0)
return 0;
lookup = resolvedname;
}
debug2("userauth_hostbased: access allowed by auth_rhosts2");
host_status = check_key_in_hostfiles(pw, key, lookup,
_PATH_SSH_SYSTEM_HOSTFILE,
options.ignore_user_known_hosts ? NULL : _PATH_SSH_USER_HOSTFILE);
/* backward compat if no key has been found. */
if (host_status == HOST_NEW)
host_status = check_key_in_hostfiles(pw, key, lookup,
_PATH_SSH_SYSTEM_HOSTFILE2,
options.ignore_user_known_hosts ? NULL :
_PATH_SSH_USER_HOSTFILE2);
return (host_status == HOST_OK);
}
Authmethod method_hostbased = {
"hostbased",
userauth_hostbased,
&options.hostbased_authentication
};

61
crypto/openssh/auth2-kbdint.c Normal file
View File

@ -0,0 +1,61 @@
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: auth2-kbdint.c,v 1.2 2002/05/31 11:35:15 markus Exp $");
#include "packet.h"
#include "auth.h"
#include "log.h"
#include "servconf.h"
#include "xmalloc.h"
/* import */
extern ServerOptions options;
static int
userauth_kbdint(Authctxt *authctxt)
{
int authenticated = 0;
char *lang, *devs;
lang = packet_get_string(NULL);
devs = packet_get_string(NULL);
packet_check_eom();
debug("keyboard-interactive devs %s", devs);
if (options.challenge_response_authentication)
authenticated = auth2_challenge(authctxt, devs);
xfree(devs);
xfree(lang);
return authenticated;
}
Authmethod method_kbdint = {
"keyboard-interactive",
userauth_kbdint,
&options.kbd_interactive_authentication
};

106
crypto/openssh/auth2-none.c Normal file
View File

@ -0,0 +1,106 @@
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: auth2-none.c,v 1.3 2002/06/19 00:27:55 deraadt Exp $");
#include "auth.h"
#include "xmalloc.h"
#include "packet.h"
#include "log.h"
#include "servconf.h"
#include "atomicio.h"
#include "compat.h"
#include "ssh2.h"
#include "monitor_wrap.h"
/* import */
extern ServerOptions options;
/* "none" is allowed only one time */
static int none_enabled = 1;
char *
auth2_read_banner(void)
{
struct stat st;
char *banner = NULL;
off_t len, n;
int fd;
if ((fd = open(options.banner, O_RDONLY)) == -1)
return (NULL);
if (fstat(fd, &st) == -1) {
close(fd);
return (NULL);
}
len = st.st_size;
banner = xmalloc(len + 1);
n = atomicio(read, fd, banner, len);
close(fd);
if (n != len) {
free(banner);
return (NULL);
}
banner[n] = '\0';
return (banner);
}
static void
userauth_banner(void)
{
char *banner = NULL;
if (options.banner == NULL || (datafellows & SSH_BUG_BANNER))
return;
if ((banner = PRIVSEP(auth2_read_banner())) == NULL)
goto done;
packet_start(SSH2_MSG_USERAUTH_BANNER);
packet_put_cstring(banner);
packet_put_cstring(""); /* language, unused */
packet_send();
debug("userauth_banner: sent");
done:
if (banner)
xfree(banner);
}
static int
userauth_none(Authctxt *authctxt)
{
none_enabled = 0;
packet_check_eom();
userauth_banner();
return (authctxt->valid ? PRIVSEP(auth_password(authctxt, "")) : 0);
}
Authmethod method_none = {
"none",
userauth_none,
&none_enabled
};

62
crypto/openssh/auth2-passwd.c Normal file
View File

@ -0,0 +1,62 @@
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: auth2-passwd.c,v 1.2 2002/05/31 11:35:15 markus Exp $");
#include "xmalloc.h"
#include "packet.h"
#include "log.h"
#include "auth.h"
#include "monitor_wrap.h"
#include "servconf.h"
/* import */
extern ServerOptions options;
static int
userauth_passwd(Authctxt *authctxt)
{
char *password;
int authenticated = 0;
int change;
u_int len;
change = packet_get_char();
if (change)
log("password change not supported");
password = packet_get_string(&len);
packet_check_eom();
if (authctxt->valid &&
PRIVSEP(auth_password(authctxt, password)) == 1)
authenticated = 1;
memset(password, 0, len);
xfree(password);
return authenticated;
}
Authmethod method_passwd = {
"password",
userauth_passwd,
&options.password_authentication
};

279
crypto/openssh/auth2-pubkey.c Normal file
View File

@ -0,0 +1,279 @@
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: auth2-pubkey.c,v 1.2 2002/05/31 11:35:15 markus Exp $");
#include "ssh2.h"
#include "xmalloc.h"
#include "packet.h"
#include "buffer.h"
#include "log.h"
#include "servconf.h"
#include "compat.h"
#include "bufaux.h"
#include "auth.h"
#include "key.h"
#include "pathnames.h"
#include "uidswap.h"
#include "auth-options.h"
#include "canohost.h"
#include "monitor_wrap.h"
/* import */
extern ServerOptions options;
extern u_char *session_id2;
extern int session_id2_len;
static int
userauth_pubkey(Authctxt *authctxt)
{
Buffer b;
Key *key = NULL;
char *pkalg;
u_char *pkblob, *sig;
u_int alen, blen, slen;
int have_sig, pktype;
int authenticated = 0;
if (!authctxt->valid) {
debug2("userauth_pubkey: disabled because of invalid user");
return 0;
}
have_sig = packet_get_char();
if (datafellows & SSH_BUG_PKAUTH) {
debug2("userauth_pubkey: SSH_BUG_PKAUTH");
/* no explicit pkalg given */
pkblob = packet_get_string(&blen);
buffer_init(&b);
buffer_append(&b, pkblob, blen);
/* so we have to extract the pkalg from the pkblob */
pkalg = buffer_get_string(&b, &alen);
buffer_free(&b);
} else {
pkalg = packet_get_string(&alen);
pkblob = packet_get_string(&blen);
}
pktype = key_type_from_name(pkalg);
if (pktype == KEY_UNSPEC) {
/* this is perfectly legal */
log("userauth_pubkey: unsupported public key algorithm: %s",
pkalg);
goto done;
}
key = key_from_blob(pkblob, blen);
if (key == NULL) {
error("userauth_pubkey: cannot decode key: %s", pkalg);
goto done;
}
if (key->type != pktype) {
error("userauth_pubkey: type mismatch for decoded key "
"(received %d, expected %d)", key->type, pktype);
goto done;
}
if (have_sig) {
sig = packet_get_string(&slen);
packet_check_eom();
buffer_init(&b);
if (datafellows & SSH_OLD_SESSIONID) {
buffer_append(&b, session_id2, session_id2_len);
} else {
buffer_put_string(&b, session_id2, session_id2_len);
}
/* reconstruct packet */
buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
buffer_put_cstring(&b, authctxt->user);
buffer_put_cstring(&b,
datafellows & SSH_BUG_PKSERVICE ?
"ssh-userauth" :
authctxt->service);
if (datafellows & SSH_BUG_PKAUTH) {
buffer_put_char(&b, have_sig);
} else {
buffer_put_cstring(&b, "publickey");
buffer_put_char(&b, have_sig);
buffer_put_cstring(&b, pkalg);
}
buffer_put_string(&b, pkblob, blen);
#ifdef DEBUG_PK
buffer_dump(&b);
#endif
/* test for correct signature */
authenticated = 0;
if (PRIVSEP(user_key_allowed(authctxt->pw, key)) &&
PRIVSEP(key_verify(key, sig, slen, buffer_ptr(&b),
buffer_len(&b))) == 1)
authenticated = 1;
buffer_clear(&b);
xfree(sig);
} else {
debug("test whether pkalg/pkblob are acceptable");
packet_check_eom();
/* XXX fake reply and always send PK_OK ? */
/*
* XXX this allows testing whether a user is allowed
* to login: if you happen to have a valid pubkey this
* message is sent. the message is NEVER sent at all
* if a user is not allowed to login. is this an
* issue? -markus
*/
if (PRIVSEP(user_key_allowed(authctxt->pw, key))) {
packet_start(SSH2_MSG_USERAUTH_PK_OK);
packet_put_string(pkalg, alen);
packet_put_string(pkblob, blen);
packet_send();
packet_write_wait();
authctxt->postponed = 1;
}
}
if (authenticated != 1)
auth_clear_options();
done:
debug2("userauth_pubkey: authenticated %d pkalg %s", authenticated, pkalg);
if (key != NULL)
key_free(key);
xfree(pkalg);
xfree(pkblob);
return authenticated;
}
/* return 1 if user allows given key */
static int
user_key_allowed2(struct passwd *pw, Key *key, char *file)
{
char line[8192];
int found_key = 0;
FILE *f;
u_long linenum = 0;
struct stat st;
Key *found;
char *fp;
if (pw == NULL)
return 0;
/* Temporarily use the user's uid. */
temporarily_use_uid(pw);
debug("trying public key file %s", file);
/* Fail quietly if file does not exist */
if (stat(file, &st) < 0) {
/* Restore the privileged uid. */
restore_uid();
return 0;
}
/* Open the file containing the authorized keys. */
f = fopen(file, "r");
if (!f) {
/* Restore the privileged uid. */
restore_uid();
return 0;
}
if (options.strict_modes &&
secure_filename(f, file, pw, line, sizeof(line)) != 0) {
fclose(f);
log("Authentication refused: %s", line);
restore_uid();
return 0;
}
found_key = 0;
found = key_new(key->type);
while (fgets(line, sizeof(line), f)) {
char *cp, *options = NULL;
linenum++;
/* Skip leading whitespace, empty and comment lines. */
for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
;
if (!*cp || *cp == '\n' || *cp == '#')
continue;
if (key_read(found, &cp) != 1) {
/* no key? check if there are options for this key */
int quoted = 0;
debug2("user_key_allowed: check options: '%s'", cp);
options = cp;
for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
if (*cp == '\\' && cp[1] == '"')
cp++; /* Skip both */
else if (*cp == '"')
quoted = !quoted;
}
/* Skip remaining whitespace. */
for (; *cp == ' ' || *cp == '\t'; cp++)
;
if (key_read(found, &cp) != 1) {
debug2("user_key_allowed: advance: '%s'", cp);
/* still no key? advance to next line*/
continue;
}
}
if (key_equal(found, key) &&
auth_parse_options(pw, options, file, linenum) == 1) {
found_key = 1;
debug("matching key found: file %s, line %lu",
file, linenum);
fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX);
verbose("Found matching %s key: %s",
key_type(found), fp);
xfree(fp);
break;
}
}
restore_uid();
fclose(f);
key_free(found);
if (!found_key)
debug2("key not found");
return found_key;
}
/* check whether given key is in .ssh/authorized_keys* */
int
user_key_allowed(struct passwd *pw, Key *key)
{
int success;
char *file;
file = authorized_keys_file(pw);
success = user_key_allowed2(pw, key, file);
xfree(file);
if (success)
return success;
/* try suffix "2" for backward compat, too */
file = authorized_keys_file2(pw);
success = user_key_allowed2(pw, key, file);
xfree(file);
return success;
}
Authmethod method_pubkey = {
"publickey",
userauth_pubkey,
&options.pubkey_authentication
};

34
crypto/openssh/authfd.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: authfd.h,v 1.23 2002/03/04 17:27:39 stevesk Exp $ */
/* $OpenBSD: authfd.h,v 1.30 2002/06/19 00:27:55 deraadt Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -40,34 +40,46 @@
/* smartcard */
#define SSH_AGENTC_ADD_SMARTCARD_KEY 20
#define SSH_AGENTC_REMOVE_SMARTCARD_KEY 21
#define SSH_AGENTC_REMOVE_SMARTCARD_KEY 21
/* lock/unlock the agent */
#define SSH_AGENTC_LOCK 22
#define SSH_AGENTC_UNLOCK 23
/* add key with constraints */
#define SSH_AGENTC_ADD_RSA_ID_CONSTRAINED 24
#define SSH2_AGENTC_ADD_ID_CONSTRAINED 25
#define SSH_AGENT_CONSTRAIN_LIFETIME 1
/* extended failure messages */
#define SSH2_AGENT_FAILURE 30
/* additional error code for ssh.com's ssh-agent2 */
#define SSH_COM_AGENT2_FAILURE 102
#define SSH_COM_AGENT2_FAILURE 102
#define SSH_AGENT_OLD_SIGNATURE 0x01
typedef struct {
int fd;
Buffer identities;
int howmany;
} AuthenticationConnection;
int fd;
Buffer identities;
int howmany;
} AuthenticationConnection;
int ssh_get_authentication_socket(void);
void ssh_close_authentication_socket(int);
int ssh_get_authentication_socket(void);
void ssh_close_authentication_socket(int);
AuthenticationConnection *ssh_get_authentication_connection(void);
void ssh_close_authentication_connection(AuthenticationConnection *);
void ssh_close_authentication_connection(AuthenticationConnection *);
int ssh_get_num_identities(AuthenticationConnection *, int);
Key *ssh_get_first_identity(AuthenticationConnection *, char **, int);
Key *ssh_get_next_identity(AuthenticationConnection *, char **, int);
int ssh_add_identity(AuthenticationConnection *, Key *, const char *);
int ssh_add_identity_constrained(AuthenticationConnection *, Key *, const char *, u_int);
int ssh_remove_identity(AuthenticationConnection *, Key *);
int ssh_remove_all_identities(AuthenticationConnection *, int);
int ssh_update_card(AuthenticationConnection *, int, const char *);
int ssh_lock_agent(AuthenticationConnection *, int, const char *);
int ssh_update_card(AuthenticationConnection *, int, const char *, const char *);
int
ssh_decrypt_challenge(AuthenticationConnection *, Key *, BIGNUM *, u_char[16],

3
crypto/openssh/authfile.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: authfile.h,v 1.9 2002/03/04 17:27:39 stevesk Exp $ */
/* $OpenBSD: authfile.h,v 1.10 2002/05/23 19:24:30 markus Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -20,5 +20,6 @@ Key *key_load_public(const char *, char **);
Key *key_load_public_type(int, const char *, char **);
Key *key_load_private(const char *, const char *, char **);
Key *key_load_private_type(int, const char *, const char *, char **);
Key *key_load_private_pem(int, int, const char *, char **);
#endif

8
crypto/openssh/bufaux.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: bufaux.h,v 1.16 2002/03/04 17:27:39 stevesk Exp $ */
/* $OpenBSD: bufaux.h,v 1.18 2002/04/20 09:14:58 markus Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -23,6 +23,9 @@ void buffer_put_bignum2(Buffer *, BIGNUM *);
void buffer_get_bignum(Buffer *, BIGNUM *);
void buffer_get_bignum2(Buffer *, BIGNUM *);
u_short buffer_get_short(Buffer *);
void buffer_put_short(Buffer *, u_short);
u_int buffer_get_int(Buffer *);
void buffer_put_int(Buffer *, u_int);
@ -36,4 +39,7 @@ void *buffer_get_string(Buffer *, u_int *);
void buffer_put_string(Buffer *, const void *, u_int);
void buffer_put_cstring(Buffer *, const char *);
#define buffer_skip_string(b) \
do { u_int l = buffer_get_int(b); buffer_consume(b, l); } while(0)
#endif /* BUFAUX_H */

74
crypto/openssh/clientloop.c
View File

@ -59,7 +59,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: clientloop.c,v 1.96 2002/02/06 14:55:15 markus Exp $");
RCSID("$OpenBSD: clientloop.c,v 1.101 2002/06/09 13:32:01 markus Exp $");
#include "ssh.h"
#include "ssh1.h"
@ -81,6 +81,7 @@ RCSID("$OpenBSD: clientloop.c,v 1.96 2002/02/06 14:55:15 markus Exp $");
#include "atomicio.h"
#include "sshtty.h"
#include "misc.h"
#include "readpass.h"
/* import options */
extern Options options;
@ -470,6 +471,67 @@ client_process_net_input(fd_set * readset)
}
}
static void
process_cmdline(void)
{
void (*handler)(int);
char *s, *cmd;
u_short fwd_port, fwd_host_port;
char buf[1024], sfwd_port[6], sfwd_host_port[6];
int local = 0;
leave_raw_mode();
handler = signal(SIGINT, SIG_IGN);
cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
if (s == NULL)
goto out;
while (*s && isspace(*s))
s++;
if (*s == 0)
goto out;
if (strlen(s) < 2 || s[0] != '-' || !(s[1] == 'L' || s[1] == 'R')) {
log("Invalid command.");
goto out;
}
if (s[1] == 'L')
local = 1;
if (!local && !compat20) {
log("Not supported for SSH protocol version 1.");
goto out;
}
s += 2;
while (*s && isspace(*s))
s++;
if (sscanf(s, "%5[0-9]:%255[^:]:%5[0-9]",
sfwd_port, buf, sfwd_host_port) != 3 &&
sscanf(s, "%5[0-9]/%255[^/]/%5[0-9]",
sfwd_port, buf, sfwd_host_port) != 3) {
log("Bad forwarding specification.");
goto out;
}
if ((fwd_port = a2port(sfwd_port)) == 0 ||
(fwd_host_port = a2port(sfwd_host_port)) == 0) {
log("Bad forwarding port(s).");
goto out;
}
if (local) {
if (channel_setup_local_fwd_listener(fwd_port, buf,
fwd_host_port, options.gateway_ports) < 0) {
log("Port forwarding failed.");
goto out;
}
} else
channel_request_remote_forwarding(fwd_port, buf,
fwd_host_port);
log("Forwarding port.");
out:
signal(SIGINT, handler);
enter_raw_mode();
if (cmd)
xfree(cmd);
}
/* process the characters one by one */
static int
process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
@ -574,6 +636,7 @@ process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
"%c?\r\n\
Supported escape sequences:\r\n\
~. - terminate connection\r\n\
~C - open a command line\r\n\
~R - Request rekey (SSH protocol 2 only)\r\n\
~^Z - suspend ssh\r\n\
~# - list forwarded connections\r\n\
@ -593,6 +656,10 @@ Supported escape sequences:\r\n\
xfree(s);
continue;
case 'C':
process_cmdline();
continue;
default:
if (ch != escape_char) {
buffer_put_char(bin, escape_char);
@ -1247,6 +1314,7 @@ static void
client_init_dispatch_20(void)
{
dispatch_init(&dispatch_protocol_error);
dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
@ -1260,6 +1328,10 @@ client_init_dispatch_20(void)
/* rekeying */
dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
/* global request reply messages */
dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply);
dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply);
}
static void
client_init_dispatch_13(void)

3
crypto/openssh/clientloop.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: clientloop.h,v 1.6 2001/06/26 17:27:23 markus Exp $ */
/* $OpenBSD: clientloop.h,v 1.7 2002/04/22 21:04:52 markus Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -37,3 +37,4 @@
/* Client side main loop for the interactive session. */
int client_loop(int, int, int);
void client_global_request_reply(int type, u_int32_t seq, void *ctxt);

14
crypto/openssh/compress.c
View File

@ -12,17 +12,19 @@
*/
#include "includes.h"
RCSID("$OpenBSD: compress.c,v 1.17 2001/12/29 21:56:01 stevesk Exp $");
RCSID("$OpenBSD: compress.c,v 1.19 2002/03/18 17:31:54 provos Exp $");
#include "log.h"
#include "buffer.h"
#include "zlib.h"
#include "compress.h"
static z_stream incoming_stream;
static z_stream outgoing_stream;
z_stream incoming_stream;
z_stream outgoing_stream;
static int compress_init_send_called = 0;
static int compress_init_recv_called = 0;
static int inflate_failed = 0;
static int deflate_failed = 0;
/*
* Initializes compression; level is compression level from 1 to 9
@ -62,9 +64,9 @@ buffer_compress_uninit(void)
incoming_stream.total_out, incoming_stream.total_in,
incoming_stream.total_out == 0 ? 0.0 :
(double) incoming_stream.total_in / incoming_stream.total_out);
if (compress_init_recv_called == 1)
if (compress_init_recv_called == 1 && inflate_failed == 0)
inflateEnd(&incoming_stream);
if (compress_init_send_called == 1)
if (compress_init_send_called == 1 && deflate_failed == 0)
deflateEnd(&outgoing_stream);
}
@ -106,6 +108,7 @@ buffer_compress(Buffer * input_buffer, Buffer * output_buffer)
sizeof(buf) - outgoing_stream.avail_out);
break;
default:
deflate_failed = 1;
fatal("buffer_compress: deflate returned %d", status);
/* NOTREACHED */
}
@ -149,6 +152,7 @@ buffer_uncompress(Buffer * input_buffer, Buffer * output_buffer)
*/
return;
default:
inflate_failed = 1;
fatal("buffer_uncompress: inflate returned %d", status);
/* NOTREACHED */
}

36
crypto/openssh/kex.c
View File

@ -23,7 +23,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: kex.c,v 1.47 2002/02/28 15:46:33 markus Exp $");
RCSID("$OpenBSD: kex.c,v 1.50 2002/05/15 15:47:49 mouring Exp $");
#include <openssl/crypto.h>
@ -40,9 +40,15 @@ RCSID("$OpenBSD: kex.c,v 1.47 2002/02/28 15:46:33 markus Exp $");
#include "mac.h"
#include "match.h"
#include "dispatch.h"
#include "monitor.h"
#define KEX_COOKIE_LEN 16
/* Use privilege separation for sshd */
int use_privsep;
struct monitor *pmonitor;
/* prototype */
static void kex_kexinit_finish(Kex *);
static void kex_choose_conf(Kex *);
@ -51,16 +57,15 @@ static void kex_choose_conf(Kex *);
static void
kex_prop2buf(Buffer *b, char *proposal[PROPOSAL_MAX])
{
u_int32_t rand = 0;
int i;
buffer_clear(b);
for (i = 0; i < KEX_COOKIE_LEN; i++) {
if (i % 4 == 0)
rand = arc4random();
buffer_put_char(b, rand & 0xff);
rand >>= 8;
}
/*
* add a dummy cookie, the cookie will be overwritten by
* kex_send_kexinit(), each time a kexinit is set
*/
for (i = 0; i < KEX_COOKIE_LEN; i++)
buffer_put_char(b, 0);
for (i = 0; i < PROPOSAL_MAX; i++)
buffer_put_cstring(b, proposal[i]);
buffer_put_char(b, 0); /* first_kex_packet_follows */
@ -146,6 +151,10 @@ kex_finish(Kex *kex)
void
kex_send_kexinit(Kex *kex)
{
u_int32_t rand = 0;
u_char *cookie;
int i;
if (kex == NULL) {
error("kex_send_kexinit: no kex, cannot rekey");
return;
@ -155,6 +164,17 @@ kex_send_kexinit(Kex *kex)
return;
}
kex->done = 0;
/* generate a random cookie */
if (buffer_len(&kex->my) < KEX_COOKIE_LEN)
fatal("kex_send_kexinit: kex proposal too short");
cookie = buffer_ptr(&kex->my);
for (i = 0; i < KEX_COOKIE_LEN; i++) {
if (i % 4 == 0)
rand = arc4random();
cookie[i] = rand;
rand >>= 8;
}
packet_start(SSH2_MSG_KEXINIT);
packet_put_raw(buffer_ptr(&kex->my), buffer_len(&kex->my));
packet_send();

5
crypto/openssh/kex.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: kex.h,v 1.29 2002/02/14 23:41:01 markus Exp $ */
/* $OpenBSD: kex.h,v 1.31 2002/05/16 22:02:50 markus Exp $ */
/*
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
@ -79,7 +79,7 @@ struct Enc {
struct Mac {
char *name;
int enabled;
EVP_MD *md;
const EVP_MD *md;
int mac_len;
u_char *key;
int key_len;
@ -111,6 +111,7 @@ struct Kex {
char *server_version_string;
int (*verify_host_key)(Key *);
Key *(*load_host_key)(int);
int (*host_key_index)(Key *);
};
Kex *kex_setup(char *[PROPOSAL_MAX]);

5
crypto/openssh/kexdh.c
View File

@ -23,7 +23,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: kexdh.c,v 1.17 2002/02/28 15:46:33 markus Exp $");
RCSID("$OpenBSD: kexdh.c,v 1.18 2002/03/18 17:50:31 provos Exp $");
#include <openssl/crypto.h>
#include <openssl/bn.h>
@ -37,6 +37,7 @@ RCSID("$OpenBSD: kexdh.c,v 1.17 2002/02/28 15:46:33 markus Exp $");
#include "packet.h"
#include "dh.h"
#include "ssh2.h"
#include "monitor_wrap.h"
static u_char *
kex_dh_hash(
@ -275,7 +276,7 @@ kexdh_server(Kex *kex)
/* sign H */
/* XXX hashlen depends on KEX */
key_sign(server_host_key, &signature, &slen, hash, 20);
PRIVSEP(key_sign(server_host_key, &signature, &slen, hash, 20));
/* destroy_sensitive_data(); */

11
crypto/openssh/kexgex.c
View File

@ -24,7 +24,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: kexgex.c,v 1.20 2002/02/28 15:46:33 markus Exp $");
RCSID("$OpenBSD: kexgex.c,v 1.22 2002/03/24 17:27:03 stevesk Exp $");
#include <openssl/bn.h>
@ -38,6 +38,7 @@ RCSID("$OpenBSD: kexgex.c,v 1.20 2002/02/28 15:46:33 markus Exp $");
#include "dh.h"
#include "ssh2.h"
#include "compat.h"
#include "monitor_wrap.h"
static u_char *
kexgex_hash(
@ -259,7 +260,7 @@ kexgex_server(Kex *kex)
{
BIGNUM *shared_secret = NULL, *dh_client_pub = NULL;
Key *server_host_key;
DH *dh = dh;
DH *dh;
u_char *kbuf, *hash, *signature = NULL, *server_host_key_blob = NULL;
u_int sbloblen, klen, kout, slen;
int min = -1, max = -1, nbits = -1, type;
@ -296,7 +297,8 @@ kexgex_server(Kex *kex)
fatal("DH_GEX_REQUEST, bad parameters: %d !< %d !< %d",
min, nbits, max);
dh = choose_dh(min, nbits, max);
/* Contact privileged parent */
dh = PRIVSEP(choose_dh(min, nbits, max));
if (dh == NULL)
packet_disconnect("Protocol error: no matching DH grp found");
@ -379,7 +381,7 @@ kexgex_server(Kex *kex)
/* sign H */
/* XXX hashlen depends on KEX */
key_sign(server_host_key, &signature, &slen, hash, 20);
PRIVSEP(key_sign(server_host_key, &signature, &slen, hash, 20));
/* destroy_sensitive_data(); */
@ -390,6 +392,7 @@ kexgex_server(Kex *kex)
packet_put_bignum2(dh->pub_key); /* f */
packet_put_string(signature, slen);
packet_send();
xfree(signature);
xfree(server_host_key_blob);
/* have keys, free DH */

3
crypto/openssh/key.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: key.h,v 1.18 2002/02/24 19:14:59 markus Exp $ */
/* $OpenBSD: key.h,v 1.19 2002/03/18 17:23:31 markus Exp $ */
/*
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
@ -58,6 +58,7 @@ struct Key {
Key *key_new(int);
Key *key_new_private(int);
void key_free(Key *);
Key *key_demote(Key *);
int key_equal(Key *, Key *);
char *key_fingerprint(Key *, enum fp_type, enum fp_rep);
char *key_type(Key *);

16
crypto/openssh/lib/Makefile
View File

@ -1,15 +1,15 @@
# $OpenBSD: Makefile,v 1.31 2002/02/22 12:20:34 markus Exp $
# $OpenBSD: Makefile,v 1.36 2002/06/11 15:23:29 hin Exp $
.PATH: ${.CURDIR}/..
LIB= ssh
SRCS= authfd.c authfile.c bufaux.c buffer.c canohost.c channels.c \
SRCS= authfd.c authfile.c bufaux.c buffer.c canohost.c channels.c \
cipher.c compat.c compress.c crc32.c deattack.c fatal.c \
hostfile.c log.c match.c mpaux.c nchan.c packet.c readpass.c \
rsa.c tildexpand.c ttymodes.c uidswap.c xmalloc.c atomicio.c \
rsa.c tildexpand.c ttymodes.c xmalloc.c atomicio.c \
key.c dispatch.c kex.c mac.c uuencode.c misc.c \
rijndael.c ssh-dss.c ssh-rsa.c dh.c kexdh.c kexgex.c \
scard.c
scard.c monitor_wrap.c monitor_fdpass.c msg.c
DEBUGLIBS= no
NOPROFILE= yes
@ -20,6 +20,10 @@ install:
.include <bsd.own.mk>
.if (${KERBEROS5:L} == "yes")
CFLAGS+= -DKRB5 -I${DESTDIR}/usr/include/kerberosV
.endif # KERBEROS5
.if (${KERBEROS:L} == "yes")
CFLAGS+= -DKRB4 -I${DESTDIR}/usr/include/kerberosIV
.if (${AFS:L} == "yes")
@ -28,8 +32,4 @@ SRCS+= radix.c
.endif # AFS
.endif # KERBEROS
.if (${KERBEROS5:L} == "yes")
CFLAGS+= -DKRB5 -I${DESTDIR}/usr/include/kerberosV
.endif # KERBEROS5
.include <bsd.lib.mk>

6
crypto/openssh/log.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: log.h,v 1.6 2002/02/22 12:20:34 markus Exp $ */
/* $OpenBSD: log.h,v 1.7 2002/05/19 20:54:52 deraadt Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -28,7 +28,7 @@ typedef enum {
SYSLOG_FACILITY_LOCAL5,
SYSLOG_FACILITY_LOCAL6,
SYSLOG_FACILITY_LOCAL7,
SYSLOG_FACILITY_NOT_SET = -1,
SYSLOG_FACILITY_NOT_SET = -1
} SyslogFacility;
typedef enum {
@ -40,7 +40,7 @@ typedef enum {
SYSLOG_LEVEL_DEBUG1,
SYSLOG_LEVEL_DEBUG2,
SYSLOG_LEVEL_DEBUG3,
SYSLOG_LEVEL_NOT_SET = -1,
SYSLOG_LEVEL_NOT_SET = -1
} LogLevel;
void log_init(char *, LogLevel, SyslogFacility, int);

4
crypto/openssh/mac.c
View File

@ -23,7 +23,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: mac.c,v 1.4 2002/01/25 22:07:40 markus Exp $");
RCSID("$OpenBSD: mac.c,v 1.5 2002/05/16 22:02:50 markus Exp $");
#include <openssl/hmac.h>
@ -36,7 +36,7 @@ RCSID("$OpenBSD: mac.c,v 1.4 2002/01/25 22:07:40 markus Exp $");
struct {
char *name;
EVP_MD * (*mdfunc)(void);
const EVP_MD * (*mdfunc)(void);
int truncatebits; /* truncate digest if != 0 */
} macs[] = {
{ "hmac-sha1", EVP_sha1, 0, },

8
crypto/openssh/misc.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: misc.h,v 1.11 2002/01/24 21:09:25 stevesk Exp $ */
/* $OpenBSD: misc.h,v 1.12 2002/03/19 10:49:35 markus Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -26,8 +26,8 @@ struct passwd *pwcopy(struct passwd *);
typedef struct arglist arglist;
struct arglist {
char **list;
int num;
int nalloc;
char **list;
int num;
int nalloc;
};
void addargs(arglist *, char *, ...) __attribute__((format(printf, 2, 3)));

1498
crypto/openssh/monitor.c Normal file
View File

File diff suppressed because it is too large Load Diff

81
crypto/openssh/monitor.h Normal file
View File

@ -0,0 +1,81 @@
/* $OpenBSD: monitor.h,v 1.6 2002/06/11 05:46:20 mpech Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MONITOR_H_
#define _MONITOR_H_
enum monitor_reqtype {
MONITOR_REQ_MODULI, MONITOR_ANS_MODULI,
MONITOR_REQ_FREE, MONITOR_REQ_AUTHSERV,
MONITOR_REQ_SIGN, MONITOR_ANS_SIGN,
MONITOR_REQ_PWNAM, MONITOR_ANS_PWNAM,
MONITOR_REQ_AUTH2_READ_BANNER, MONITOR_ANS_AUTH2_READ_BANNER,
MONITOR_REQ_AUTHPASSWORD, MONITOR_ANS_AUTHPASSWORD,
MONITOR_REQ_BSDAUTHQUERY, MONITOR_ANS_BSDAUTHQUERY,
MONITOR_REQ_BSDAUTHRESPOND, MONITOR_ANS_BSDAUTHRESPOND,
MONITOR_REQ_SKEYQUERY, MONITOR_ANS_SKEYQUERY,
MONITOR_REQ_SKEYRESPOND, MONITOR_ANS_SKEYRESPOND,
MONITOR_REQ_KEYALLOWED, MONITOR_ANS_KEYALLOWED,
MONITOR_REQ_KEYVERIFY, MONITOR_ANS_KEYVERIFY,
MONITOR_REQ_KEYEXPORT,
MONITOR_REQ_PTY, MONITOR_ANS_PTY,
MONITOR_REQ_PTYCLEANUP,
MONITOR_REQ_SESSKEY, MONITOR_ANS_SESSKEY,
MONITOR_REQ_SESSID,
MONITOR_REQ_RSAKEYALLOWED, MONITOR_ANS_RSAKEYALLOWED,
MONITOR_REQ_RSACHALLENGE, MONITOR_ANS_RSACHALLENGE,
MONITOR_REQ_RSARESPONSE, MONITOR_ANS_RSARESPONSE,
MONITOR_REQ_TERM
};
struct mm_master;
struct monitor {
int m_recvfd;
int m_sendfd;
struct mm_master *m_zback;
struct mm_master *m_zlib;
struct Kex **m_pkex;
pid_t m_pid;
};
struct monitor *monitor_init(void);
void monitor_reinit(struct monitor *);
void monitor_sync(struct monitor *);
struct Authctxt;
struct Authctxt *monitor_child_preauth(struct monitor *);
void monitor_child_postauth(struct monitor *);
struct mon_table;
int monitor_read(struct monitor*, struct mon_table *, struct mon_table **);
/* Prototypes for request sending and receiving */
void mm_request_send(int, enum monitor_reqtype, Buffer *);
void mm_request_receive(int, Buffer *);
void mm_request_receive_expect(int, enum monitor_reqtype, Buffer *);
#endif /* _MONITOR_H_ */

96
crypto/openssh/monitor_fdpass.c Normal file
View File

@ -0,0 +1,96 @@
/*
* Copyright 2001 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: monitor_fdpass.c,v 1.3 2002/06/04 23:05:49 markus Exp $");
#include <sys/uio.h>
#include "log.h"
#include "monitor_fdpass.h"
void
mm_send_fd(int socket, int fd)
{
struct msghdr msg;
char tmp[CMSG_SPACE(sizeof(int))];
struct cmsghdr *cmsg;
struct iovec vec;
char ch = '\0';
int n;
memset(&msg, 0, sizeof(msg));
msg.msg_control = (caddr_t)tmp;
msg.msg_controllen = CMSG_LEN(sizeof(int));
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
*(int *)CMSG_DATA(cmsg) = fd;
vec.iov_base = &ch;
vec.iov_len = 1;
msg.msg_iov = &vec;
msg.msg_iovlen = 1;
if ((n = sendmsg(socket, &msg, 0)) == -1)
fatal("%s: sendmsg(%d): %s", __func__, fd,
strerror(errno));
if (n != 1)
fatal("%s: sendmsg: expected sent 1 got %d",
__func__, n);
}
int
mm_receive_fd(int socket)
{
struct msghdr msg;
char tmp[CMSG_SPACE(sizeof(int))];
struct cmsghdr *cmsg;
struct iovec vec;
char ch;
int fd, n;
memset(&msg, 0, sizeof(msg));
vec.iov_base = &ch;
vec.iov_len = 1;
msg.msg_iov = &vec;
msg.msg_iovlen = 1;
msg.msg_control = tmp;
msg.msg_controllen = sizeof(tmp);
if ((n = recvmsg(socket, &msg, 0)) == -1)
fatal("%s: recvmsg: %s", __func__, strerror(errno));
if (n != 1)
fatal("%s: recvmsg: expected received 1 got %d",
__func__, n);
cmsg = CMSG_FIRSTHDR(&msg);
if (cmsg->cmsg_type != SCM_RIGHTS)
fatal("%s: expected type %d got %d", __func__,
SCM_RIGHTS, cmsg->cmsg_type);
fd = (*(int *)CMSG_DATA(cmsg));
return fd;
}

34
crypto/openssh/monitor_fdpass.h Normal file
View File

@ -0,0 +1,34 @@
/* $OpenBSD: monitor_fdpass.h,v 1.2 2002/03/26 03:24:01 stevesk Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MM_FDPASS_H_
#define _MM_FDPASS_H_
void mm_send_fd(int, int);
int mm_receive_fd(int);
#endif /* _MM_FDPASS_H_ */

330
crypto/openssh/monitor_mm.c Normal file
View File

@ -0,0 +1,330 @@
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: monitor_mm.c,v 1.6 2002/06/04 23:05:49 markus Exp $");
#include <sys/mman.h>
#include "ssh.h"
#include "xmalloc.h"
#include "log.h"
#include "monitor_mm.h"
static int
mm_compare(struct mm_share *a, struct mm_share *b)
{
return ((char *)a->address - (char *)b->address);
}
RB_GENERATE(mmtree, mm_share, next, mm_compare)
static struct mm_share *
mm_make_entry(struct mm_master *mm, struct mmtree *head,
void *address, size_t size)
{
struct mm_share *tmp, *tmp2;
if (mm->mmalloc == NULL)
tmp = xmalloc(sizeof(struct mm_share));
else
tmp = mm_xmalloc(mm->mmalloc, sizeof(struct mm_share));
tmp->address = address;
tmp->size = size;
tmp2 = RB_INSERT(mmtree, head, tmp);
if (tmp2 != NULL)
fatal("mm_make_entry(%p): double address %p->%p(%lu)",
mm, tmp2, address, (u_long)size);
return (tmp);
}
/* Creates a shared memory area of a certain size */
struct mm_master *
mm_create(struct mm_master *mmalloc, size_t size)
{
void *address;
struct mm_master *mm;
if (mmalloc == NULL)
mm = xmalloc(sizeof(struct mm_master));
else
mm = mm_xmalloc(mmalloc, sizeof(struct mm_master));
/*
* If the memory map has a mm_master it can be completely
* shared including authentication between the child
* and the client.
*/
mm->mmalloc = mmalloc;
address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_ANON|MAP_SHARED,
-1, 0);
if (address == MAP_FAILED)
fatal("mmap(%lu): %s", (u_long)size, strerror(errno));
mm->address = address;
mm->size = size;
RB_INIT(&mm->rb_free);
RB_INIT(&mm->rb_allocated);
mm_make_entry(mm, &mm->rb_free, address, size);
return (mm);
}
/* Frees either the allocated or the free list */
static void
mm_freelist(struct mm_master *mmalloc, struct mmtree *head)
{
struct mm_share *mms, *next;
for (mms = RB_ROOT(head); mms; mms = next) {
next = RB_NEXT(mmtree, head, mms);
RB_REMOVE(mmtree, head, mms);
if (mmalloc == NULL)
xfree(mms);
else
mm_free(mmalloc, mms);
}
}
/* Destroys a memory mapped area */
void
mm_destroy(struct mm_master *mm)
{
mm_freelist(mm->mmalloc, &mm->rb_free);
mm_freelist(mm->mmalloc, &mm->rb_allocated);
if (munmap(mm->address, mm->size) == -1)
fatal("munmap(%p, %lu): %s", mm->address, (u_long)mm->size,
strerror(errno));
if (mm->mmalloc == NULL)
xfree(mm);
else
mm_free(mm->mmalloc, mm);
}
void *
mm_xmalloc(struct mm_master *mm, size_t size)
{
void *address;
address = mm_malloc(mm, size);
if (address == NULL)
fatal("%s: mm_malloc(%lu)", __func__, (u_long)size);
return (address);
}
/* Allocates data from a memory mapped area */
void *
mm_malloc(struct mm_master *mm, size_t size)
{
struct mm_share *mms, *tmp;
if (size == 0)
fatal("mm_malloc: try to allocate 0 space");
size = ((size + MM_MINSIZE - 1) / MM_MINSIZE) * MM_MINSIZE;
RB_FOREACH(mms, mmtree, &mm->rb_free) {
if (mms->size >= size)
break;
}
if (mms == NULL)
return (NULL);
/* Debug */
memset(mms->address, 0xd0, size);
tmp = mm_make_entry(mm, &mm->rb_allocated, mms->address, size);
/* Does not change order in RB tree */
mms->size -= size;
mms->address = (u_char *)mms->address + size;
if (mms->size == 0) {
RB_REMOVE(mmtree, &mm->rb_free, mms);
if (mm->mmalloc == NULL)
xfree(mms);
else
mm_free(mm->mmalloc, mms);
}
return (tmp->address);
}
/* Frees memory in a memory mapped area */
void
mm_free(struct mm_master *mm, void *address)
{
struct mm_share *mms, *prev, tmp;
tmp.address = address;
mms = RB_FIND(mmtree, &mm->rb_allocated, &tmp);
if (mms == NULL)
fatal("mm_free(%p): can not find %p", mm, address);
/* Debug */
memset(mms->address, 0xd0, mms->size);
/* Remove from allocated list and insert in free list */
RB_REMOVE(mmtree, &mm->rb_allocated, mms);
if (RB_INSERT(mmtree, &mm->rb_free, mms) != NULL)
fatal("mm_free(%p): double address %p", mm, address);
/* Find previous entry */
prev = mms;
if (RB_LEFT(prev, next)) {
prev = RB_LEFT(prev, next);
while (RB_RIGHT(prev, next))
prev = RB_RIGHT(prev, next);
} else {
if (RB_PARENT(prev, next) &&
(prev == RB_RIGHT(RB_PARENT(prev, next), next)))
prev = RB_PARENT(prev, next);
else {
while (RB_PARENT(prev, next) &&
(prev == RB_LEFT(RB_PARENT(prev, next), next)))
prev = RB_PARENT(prev, next);
prev = RB_PARENT(prev, next);
}
}
/* Check if range does not overlap */
if (prev != NULL && MM_ADDRESS_END(prev) > address)
fatal("mm_free: memory corruption: %p(%lu) > %p",
prev->address, (u_long)prev->size, address);
/* See if we can merge backwards */
if (prev != NULL && MM_ADDRESS_END(prev) == address) {
prev->size += mms->size;
RB_REMOVE(mmtree, &mm->rb_free, mms);
if (mm->mmalloc == NULL)
xfree(mms);
else
mm_free(mm->mmalloc, mms);
} else
prev = mms;
if (prev == NULL)
return;
/* Check if we can merge forwards */
mms = RB_NEXT(mmtree, &mm->rb_free, prev);
if (mms == NULL)
return;
if (MM_ADDRESS_END(prev) > mms->address)
fatal("mm_free: memory corruption: %p < %p(%lu)",
mms->address, prev->address, (u_long)prev->size);
if (MM_ADDRESS_END(prev) != mms->address)
return;
prev->size += mms->size;
RB_REMOVE(mmtree, &mm->rb_free, mms);
if (mm->mmalloc == NULL)
xfree(mms);
else
mm_free(mm->mmalloc, mms);
}
static void
mm_sync_list(struct mmtree *oldtree, struct mmtree *newtree,
struct mm_master *mm, struct mm_master *mmold)
{
struct mm_master *mmalloc = mm->mmalloc;
struct mm_share *mms, *new;
/* Sync free list */
RB_FOREACH(mms, mmtree, oldtree) {
/* Check the values */
mm_memvalid(mmold, mms, sizeof(struct mm_share));
mm_memvalid(mm, mms->address, mms->size);
new = mm_xmalloc(mmalloc, sizeof(struct mm_share));
memcpy(new, mms, sizeof(struct mm_share));
RB_INSERT(mmtree, newtree, new);
}
}
void
mm_share_sync(struct mm_master **pmm, struct mm_master **pmmalloc)
{
struct mm_master *mm;
struct mm_master *mmalloc;
struct mm_master *mmold;
struct mmtree rb_free, rb_allocated;
debug3("%s: Share sync", __func__);
mm = *pmm;
mmold = mm->mmalloc;
mm_memvalid(mmold, mm, sizeof(*mm));
mmalloc = mm_create(NULL, mm->size);
mm = mm_xmalloc(mmalloc, sizeof(struct mm_master));
memcpy(mm, *pmm, sizeof(struct mm_master));
mm->mmalloc = mmalloc;
rb_free = mm->rb_free;
rb_allocated = mm->rb_allocated;
RB_INIT(&mm->rb_free);
RB_INIT(&mm->rb_allocated);
mm_sync_list(&rb_free, &mm->rb_free, mm, mmold);
mm_sync_list(&rb_allocated, &mm->rb_allocated, mm, mmold);
mm_destroy(mmold);
*pmm = mm;
*pmmalloc = mmalloc;
debug3("%s: Share sync end", __func__);
}
void
mm_memvalid(struct mm_master *mm, void *address, size_t size)
{
void *end = (u_char *)address + size;
if (address < mm->address)
fatal("mm_memvalid: address too small: %p", address);
if (end < address)
fatal("mm_memvalid: end < address: %p < %p", end, address);
if (end > (void *)((u_char *)mm->address + mm->size))
fatal("mm_memvalid: address too large: %p", address);
}

66
crypto/openssh/monitor_mm.h Normal file
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@ -0,0 +1,66 @@
/* $OpenBSD: monitor_mm.h,v 1.2 2002/03/26 03:24:01 stevesk Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MM_H_
#define _MM_H_
#include <sys/tree.h>
struct mm_share {
RB_ENTRY(mm_share) next;
void *address;
size_t size;
};
struct mm_master {
RB_HEAD(mmtree, mm_share) rb_free;
struct mmtree rb_allocated;
void *address;
size_t size;
struct mm_master *mmalloc; /* Used to completely share */
int write; /* used to writing to other party */
int read; /* used for reading from other party */
};
RB_PROTOTYPE(mmtree, mm_share, next, mm_compare)
#define MM_MINSIZE 128
#define MM_ADDRESS_END(x) (void *)((u_char *)(x)->address + (x)->size)
struct mm_master *mm_create(struct mm_master *, size_t);
void mm_destroy(struct mm_master *);
void mm_share_sync(struct mm_master **, struct mm_master **);
void *mm_malloc(struct mm_master *, size_t);
void *mm_xmalloc(struct mm_master *, size_t);
void mm_free(struct mm_master *, void *);
void mm_memvalid(struct mm_master *, void *, size_t);
#endif /* _MM_H_ */

920
crypto/openssh/monitor_wrap.c Normal file
View File

@ -0,0 +1,920 @@
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* Copyright 2002 Markus Friedl <markus@openbsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: monitor_wrap.c,v 1.11 2002/06/19 18:01:00 markus Exp $");
#include <openssl/bn.h>
#include <openssl/dh.h>
#include "ssh.h"
#include "dh.h"
#include "kex.h"
#include "auth.h"
#include "buffer.h"
#include "bufaux.h"
#include "packet.h"
#include "mac.h"
#include "log.h"
#include "zlib.h"
#include "monitor.h"
#include "monitor_wrap.h"
#include "xmalloc.h"
#include "atomicio.h"
#include "monitor_fdpass.h"
#include "getput.h"
#include "auth.h"
#include "channels.h"
#include "session.h"
/* Imports */
extern int compat20;
extern Newkeys *newkeys[];
extern z_stream incoming_stream;
extern z_stream outgoing_stream;
extern struct monitor *pmonitor;
extern Buffer input, output;
void
mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
{
u_char buf[5];
u_int mlen = buffer_len(m);
debug3("%s entering: type %d", __func__, type);
PUT_32BIT(buf, mlen + 1);
buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
if (atomicio(write, socket, buf, sizeof(buf)) != sizeof(buf))
fatal("%s: write", __func__);
if (atomicio(write, socket, buffer_ptr(m), mlen) != mlen)
fatal("%s: write", __func__);
}
void
mm_request_receive(int socket, Buffer *m)
{
u_char buf[4];
ssize_t res;
u_int msg_len;
debug3("%s entering", __func__);
res = atomicio(read, socket, buf, sizeof(buf));
if (res != sizeof(buf)) {
if (res == 0)
fatal_cleanup();
fatal("%s: read: %ld", __func__, (long)res);
}
msg_len = GET_32BIT(buf);
if (msg_len > 256 * 1024)
fatal("%s: read: bad msg_len %d", __func__, msg_len);
buffer_clear(m);
buffer_append_space(m, msg_len);
res = atomicio(read, socket, buffer_ptr(m), msg_len);
if (res != msg_len)
fatal("%s: read: %ld != msg_len", __func__, (long)res);
}
void
mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
{
u_char rtype;
debug3("%s entering: type %d", __func__, type);
mm_request_receive(socket, m);
rtype = buffer_get_char(m);
if (rtype != type)
fatal("%s: read: rtype %d != type %d", __func__,
rtype, type);
}
DH *
mm_choose_dh(int min, int nbits, int max)
{
BIGNUM *p, *g;
int success = 0;
Buffer m;
buffer_init(&m);
buffer_put_int(&m, min);
buffer_put_int(&m, nbits);
buffer_put_int(&m, max);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
success = buffer_get_char(&m);
if (success == 0)
fatal("%s: MONITOR_ANS_MODULI failed", __func__);
if ((p = BN_new()) == NULL)
fatal("%s: BN_new failed", __func__);
if ((g = BN_new()) == NULL)
fatal("%s: BN_new failed", __func__);
buffer_get_bignum2(&m, p);
buffer_get_bignum2(&m, g);
debug3("%s: remaining %d", __func__, buffer_len(&m));
buffer_free(&m);
return (dh_new_group(g, p));
}
int
mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
{
Kex *kex = *pmonitor->m_pkex;
Buffer m;
debug3("%s entering", __func__);
buffer_init(&m);
buffer_put_int(&m, kex->host_key_index(key));
buffer_put_string(&m, data, datalen);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
*sigp = buffer_get_string(&m, lenp);
buffer_free(&m);
return (0);
}
struct passwd *
mm_getpwnamallow(const char *login)
{
Buffer m;
struct passwd *pw;
u_int pwlen;
debug3("%s entering", __func__);
buffer_init(&m);
buffer_put_cstring(&m, login);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
if (buffer_get_char(&m) == 0) {
buffer_free(&m);
return (NULL);
}
pw = buffer_get_string(&m, &pwlen);
if (pwlen != sizeof(struct passwd))
fatal("%s: struct passwd size mismatch", __func__);
pw->pw_name = buffer_get_string(&m, NULL);
pw->pw_passwd = buffer_get_string(&m, NULL);
pw->pw_gecos = buffer_get_string(&m, NULL);
pw->pw_class = buffer_get_string(&m, NULL);
pw->pw_dir = buffer_get_string(&m, NULL);
pw->pw_shell = buffer_get_string(&m, NULL);
buffer_free(&m);
return (pw);
}
char* mm_auth2_read_banner(void)
{
Buffer m;
char *banner;
debug3("%s entering", __func__);
buffer_init(&m);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
buffer_clear(&m);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTH2_READ_BANNER, &m);
banner = buffer_get_string(&m, NULL);
buffer_free(&m);
return (banner);
}
/* Inform the privileged process about service and style */
void
mm_inform_authserv(char *service, char *style)
{
Buffer m;
debug3("%s entering", __func__);
buffer_init(&m);
buffer_put_cstring(&m, service);
buffer_put_cstring(&m, style ? style : "");
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
buffer_free(&m);
}
/* Do the password authentication */
int
mm_auth_password(Authctxt *authctxt, char *password)
{
Buffer m;
int authenticated = 0;
debug3("%s entering", __func__);
buffer_init(&m);
buffer_put_cstring(&m, password);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
authenticated = buffer_get_int(&m);
buffer_free(&m);
debug3("%s: user %sauthenticated",
__func__, authenticated ? "" : "not ");
return (authenticated);
}
int
mm_user_key_allowed(struct passwd *pw, Key *key)
{
return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
}
int
mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
Key *key)
{
return (mm_key_allowed(MM_HOSTKEY, user, host, key));
}
int
mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
char *host, Key *key)
{
int ret;
key->type = KEY_RSA; /* XXX hack for key_to_blob */
ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
key->type = KEY_RSA1;
return (ret);
}
static void
mm_send_debug(Buffer *m)
{
char *msg;
while (buffer_len(m)) {
msg = buffer_get_string(m, NULL);
debug3("%s: Sending debug: %s", __func__, msg);
packet_send_debug("%s", msg);
xfree(msg);
}
}
int
mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
{
Buffer m;
u_char *blob;
u_int len;
int allowed = 0;
debug3("%s entering", __func__);
/* Convert the key to a blob and the pass it over */
if (!key_to_blob(key, &blob, &len))
return (0);
buffer_init(&m);
buffer_put_int(&m, type);
buffer_put_cstring(&m, user ? user : "");
buffer_put_cstring(&m, host ? host : "");
buffer_put_string(&m, blob, len);
xfree(blob);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
allowed = buffer_get_int(&m);
/* Send potential debug messages */
mm_send_debug(&m);
buffer_free(&m);
return (allowed);
}
/*
* This key verify needs to send the key type along, because the
* privileged parent makes the decision if the key is allowed
* for authentication.
*/
int
mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
{
Buffer m;
u_char *blob;
u_int len;
int verified = 0;
debug3("%s entering", __func__);
/* Convert the key to a blob and the pass it over */
if (!key_to_blob(key, &blob, &len))
return (0);
buffer_init(&m);
buffer_put_string(&m, blob, len);
buffer_put_string(&m, sig, siglen);
buffer_put_string(&m, data, datalen);
xfree(blob);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
verified = buffer_get_int(&m);
buffer_free(&m);
return (verified);
}
/* Export key state after authentication */
Newkeys *
mm_newkeys_from_blob(u_char *blob, int blen)
{
Buffer b;
u_int len;
Newkeys *newkey = NULL;
Enc *enc;
Mac *mac;
Comp *comp;
debug3("%s: %p(%d)", __func__, blob, blen);
#ifdef DEBUG_PK
dump_base64(stderr, blob, blen);
#endif
buffer_init(&b);
buffer_append(&b, blob, blen);
newkey = xmalloc(sizeof(*newkey));
enc = &newkey->enc;
mac = &newkey->mac;
comp = &newkey->comp;
/* Enc structure */
enc->name = buffer_get_string(&b, NULL);
buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
enc->enabled = buffer_get_int(&b);
enc->block_size = buffer_get_int(&b);
enc->key = buffer_get_string(&b, &enc->key_len);
enc->iv = buffer_get_string(&b, &len);
if (len != enc->block_size)
fatal("%s: bad ivlen: expected %d != %d", __func__,
enc->block_size, len);
if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
fatal("%s: bad cipher name %s or pointer %p", __func__,
enc->name, enc->cipher);
/* Mac structure */
mac->name = buffer_get_string(&b, NULL);
if (mac->name == NULL || mac_init(mac, mac->name) == -1)
fatal("%s: can not init mac %s", __func__, mac->name);
mac->enabled = buffer_get_int(&b);
mac->key = buffer_get_string(&b, &len);
if (len > mac->key_len)
fatal("%s: bad mac key length: %d > %d", __func__, len,
mac->key_len);
mac->key_len = len;
/* Comp structure */
comp->type = buffer_get_int(&b);
comp->enabled = buffer_get_int(&b);
comp->name = buffer_get_string(&b, NULL);
len = buffer_len(&b);
if (len != 0)
error("newkeys_from_blob: remaining bytes in blob %d", len);
buffer_free(&b);
return (newkey);
}
int
mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
{
Buffer b;
int len;
u_char *buf;
Enc *enc;
Mac *mac;
Comp *comp;
Newkeys *newkey = newkeys[mode];
debug3("%s: converting %p", __func__, newkey);
if (newkey == NULL) {
error("%s: newkey == NULL", __func__);
return 0;
}
enc = &newkey->enc;
mac = &newkey->mac;
comp = &newkey->comp;
buffer_init(&b);
/* Enc structure */
buffer_put_cstring(&b, enc->name);
/* The cipher struct is constant and shared, you export pointer */
buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
buffer_put_int(&b, enc->enabled);
buffer_put_int(&b, enc->block_size);
buffer_put_string(&b, enc->key, enc->key_len);
packet_get_keyiv(mode, enc->iv, enc->block_size);
buffer_put_string(&b, enc->iv, enc->block_size);
/* Mac structure */
buffer_put_cstring(&b, mac->name);
buffer_put_int(&b, mac->enabled);
buffer_put_string(&b, mac->key, mac->key_len);
/* Comp structure */
buffer_put_int(&b, comp->type);
buffer_put_int(&b, comp->enabled);
buffer_put_cstring(&b, comp->name);
len = buffer_len(&b);
buf = xmalloc(len);
memcpy(buf, buffer_ptr(&b), len);
memset(buffer_ptr(&b), 0, len);
buffer_free(&b);
if (lenp != NULL)
*lenp = len;
if (blobp != NULL)
*blobp = buf;
return len;
}
static void
mm_send_kex(Buffer *m, Kex *kex)
{
buffer_put_string(m, kex->session_id, kex->session_id_len);
buffer_put_int(m, kex->we_need);
buffer_put_int(m, kex->hostkey_type);
buffer_put_int(m, kex->kex_type);
buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
buffer_put_int(m, kex->flags);
buffer_put_cstring(m, kex->client_version_string);
buffer_put_cstring(m, kex->server_version_string);
}
void
mm_send_keystate(struct monitor *pmonitor)
{
Buffer m;
u_char *blob, *p;
u_int bloblen, plen;
buffer_init(&m);
if (!compat20) {
u_char iv[24];
u_char *key;
u_int ivlen, keylen;
buffer_put_int(&m, packet_get_protocol_flags());
buffer_put_int(&m, packet_get_ssh1_cipher());
debug3("%s: Sending ssh1 KEY+IV", __func__);
keylen = packet_get_encryption_key(NULL);
key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
keylen = packet_get_encryption_key(key);
buffer_put_string(&m, key, keylen);
memset(key, 0, keylen);
xfree(key);
ivlen = packet_get_keyiv_len(MODE_OUT);
packet_get_keyiv(MODE_OUT, iv, ivlen);
buffer_put_string(&m, iv, ivlen);
ivlen = packet_get_keyiv_len(MODE_OUT);
packet_get_keyiv(MODE_IN, iv, ivlen);
buffer_put_string(&m, iv, ivlen);
goto skip;
} else {
/* Kex for rekeying */
mm_send_kex(&m, *pmonitor->m_pkex);
}
debug3("%s: Sending new keys: %p %p",
__func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
/* Keys from Kex */
if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
fatal("%s: conversion of newkeys failed", __func__);
buffer_put_string(&m, blob, bloblen);
xfree(blob);
if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
fatal("%s: conversion of newkeys failed", __func__);
buffer_put_string(&m, blob, bloblen);
xfree(blob);
buffer_put_int(&m, packet_get_seqnr(MODE_OUT));
buffer_put_int(&m, packet_get_seqnr(MODE_IN));
debug3("%s: New keys have been sent", __func__);
skip:
/* More key context */
plen = packet_get_keycontext(MODE_OUT, NULL);
p = xmalloc(plen+1);
packet_get_keycontext(MODE_OUT, p);
buffer_put_string(&m, p, plen);
xfree(p);
plen = packet_get_keycontext(MODE_IN, NULL);
p = xmalloc(plen+1);
packet_get_keycontext(MODE_IN, p);
buffer_put_string(&m, p, plen);
xfree(p);
/* Compression state */
debug3("%s: Sending compression state", __func__);
buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
/* Network I/O buffers */
buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
debug3("%s: Finished sending state", __func__);
buffer_free(&m);
}
int
mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
{
Buffer m;
u_char *p;
int success = 0;
buffer_init(&m);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
success = buffer_get_int(&m);
if (success == 0) {
debug3("%s: pty alloc failed", __func__);
buffer_free(&m);
return (0);
}
p = buffer_get_string(&m, NULL);
buffer_free(&m);
strlcpy(namebuf, p, namebuflen); /* Possible truncation */
xfree(p);
*ptyfd = mm_receive_fd(pmonitor->m_recvfd);
*ttyfd = mm_receive_fd(pmonitor->m_recvfd);
/* Success */
return (1);
}
void
mm_session_pty_cleanup2(void *session)
{
Session *s = session;
Buffer m;
if (s->ttyfd == -1)
return;
buffer_init(&m);
buffer_put_cstring(&m, s->tty);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
buffer_free(&m);
/* closed dup'ed master */
if (close(s->ptymaster) < 0)
error("close(s->ptymaster): %s", strerror(errno));
/* unlink pty from session */
s->ttyfd = -1;
}
/* Request process termination */
void
mm_terminate(void)
{
Buffer m;
buffer_init(&m);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
buffer_free(&m);
}
int
mm_ssh1_session_key(BIGNUM *num)
{
int rsafail;
Buffer m;
buffer_init(&m);
buffer_put_bignum2(&m, num);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
rsafail = buffer_get_int(&m);
buffer_get_bignum2(&m, num);
buffer_free(&m);
return (rsafail);
}
static void
mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
char ***prompts, u_int **echo_on)
{
*name = xstrdup("");
*infotxt = xstrdup("");
*numprompts = 1;
*prompts = xmalloc(*numprompts * sizeof(char*));
*echo_on = xmalloc(*numprompts * sizeof(u_int));
(*echo_on)[0] = 0;
}
int
mm_bsdauth_query(void *ctx, char **name, char **infotxt,
u_int *numprompts, char ***prompts, u_int **echo_on)
{
Buffer m;
int res;
char *challenge;
debug3("%s: entering", __func__);
buffer_init(&m);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
&m);
res = buffer_get_int(&m);
if (res == -1) {
debug3("%s: no challenge", __func__);
buffer_free(&m);
return (-1);
}
/* Get the challenge, and format the response */
challenge = buffer_get_string(&m, NULL);
buffer_free(&m);
mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
(*prompts)[0] = challenge;
debug3("%s: received challenge: %s", __func__, challenge);
return (0);
}
int
mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
{
Buffer m;
int authok;
debug3("%s: entering", __func__);
if (numresponses != 1)
return (-1);
buffer_init(&m);
buffer_put_cstring(&m, responses[0]);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
mm_request_receive_expect(pmonitor->m_recvfd,
MONITOR_ANS_BSDAUTHRESPOND, &m);
authok = buffer_get_int(&m);
buffer_free(&m);
return ((authok == 0) ? -1 : 0);
}
int
mm_skey_query(void *ctx, char **name, char **infotxt,
u_int *numprompts, char ***prompts, u_int **echo_on)
{
Buffer m;
int len, res;
char *p, *challenge;
debug3("%s: entering", __func__);
buffer_init(&m);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
&m);
res = buffer_get_int(&m);
if (res == -1) {
debug3("%s: no challenge", __func__);
buffer_free(&m);
return (-1);
}
/* Get the challenge, and format the response */
challenge = buffer_get_string(&m, NULL);
buffer_free(&m);
debug3("%s: received challenge: %s", __func__, challenge);
mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
p = xmalloc(len);
strlcpy(p, challenge, len);
strlcat(p, SKEY_PROMPT, len);
(*prompts)[0] = p;
xfree(challenge);
return (0);
}
int
mm_skey_respond(void *ctx, u_int numresponses, char **responses)
{
Buffer m;
int authok;
debug3("%s: entering", __func__);
if (numresponses != 1)
return (-1);
buffer_init(&m);
buffer_put_cstring(&m, responses[0]);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
mm_request_receive_expect(pmonitor->m_recvfd,
MONITOR_ANS_SKEYRESPOND, &m);
authok = buffer_get_int(&m);
buffer_free(&m);
return ((authok == 0) ? -1 : 0);
}
void
mm_ssh1_session_id(u_char session_id[16])
{
Buffer m;
int i;
debug3("%s entering", __func__);
buffer_init(&m);
for (i = 0; i < 16; i++)
buffer_put_char(&m, session_id[i]);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
buffer_free(&m);
}
int
mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
{
Buffer m;
Key *key;
u_char *blob;
u_int blen;
int allowed = 0;
debug3("%s entering", __func__);
buffer_init(&m);
buffer_put_bignum2(&m, client_n);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
allowed = buffer_get_int(&m);
if (allowed && rkey != NULL) {
blob = buffer_get_string(&m, &blen);
if ((key = key_from_blob(blob, blen)) == NULL)
fatal("%s: key_from_blob failed", __func__);
*rkey = key;
xfree(blob);
}
mm_send_debug(&m);
buffer_free(&m);
return (allowed);
}
BIGNUM *
mm_auth_rsa_generate_challenge(Key *key)
{
Buffer m;
BIGNUM *challenge;
u_char *blob;
u_int blen;
debug3("%s entering", __func__);
if ((challenge = BN_new()) == NULL)
fatal("%s: BN_new failed", __func__);
key->type = KEY_RSA; /* XXX cheat for key_to_blob */
if (key_to_blob(key, &blob, &blen) == 0)
fatal("%s: key_to_blob failed", __func__);
key->type = KEY_RSA1;
buffer_init(&m);
buffer_put_string(&m, blob, blen);
xfree(blob);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
buffer_get_bignum2(&m, challenge);
buffer_free(&m);
return (challenge);
}
int
mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
{
Buffer m;
u_char *blob;
u_int blen;
int success = 0;
debug3("%s entering", __func__);
key->type = KEY_RSA; /* XXX cheat for key_to_blob */
if (key_to_blob(key, &blob, &blen) == 0)
fatal("%s: key_to_blob failed", __func__);
key->type = KEY_RSA1;
buffer_init(&m);
buffer_put_string(&m, blob, blen);
buffer_put_string(&m, response, 16);
xfree(blob);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
success = buffer_get_int(&m);
buffer_free(&m);
return (success);
}

88
crypto/openssh/monitor_wrap.h Normal file
View File

@ -0,0 +1,88 @@
/* $OpenBSD: monitor_wrap.h,v 1.5 2002/05/12 23:53:45 djm Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MM_WRAP_H_
#define _MM_WRAP_H_
#include "key.h"
#include "buffer.h"
extern int use_privsep;
#define PRIVSEP(x) (use_privsep ? mm_##x : x)
enum mm_keytype {MM_NOKEY, MM_HOSTKEY, MM_USERKEY, MM_RSAHOSTKEY, MM_RSAUSERKEY};
struct monitor;
struct mm_master;
struct passwd;
struct Authctxt;
DH *mm_choose_dh(int, int, int);
int mm_key_sign(Key *, u_char **, u_int *, u_char *, u_int);
void mm_inform_authserv(char *, char *);
struct passwd *mm_getpwnamallow(const char *);
char* mm_auth2_read_banner(void);
int mm_auth_password(struct Authctxt *, char *);
int mm_key_allowed(enum mm_keytype, char *, char *, Key *);
int mm_user_key_allowed(struct passwd *, Key *);
int mm_hostbased_key_allowed(struct passwd *, char *, char *, Key *);
int mm_auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *);
int mm_key_verify(Key *, u_char *, u_int, u_char *, u_int);
int mm_auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **);
int mm_auth_rsa_verify_response(Key *, BIGNUM *, u_char *);
BIGNUM *mm_auth_rsa_generate_challenge(Key *);
void mm_terminate(void);
int mm_pty_allocate(int *, int *, char *, int);
void mm_session_pty_cleanup2(void *);
/* SSHv1 interfaces */
void mm_ssh1_session_id(u_char *);
int mm_ssh1_session_key(BIGNUM *);
/* Key export functions */
struct Newkeys *mm_newkeys_from_blob(u_char *, int);
int mm_newkeys_to_blob(int, u_char **, u_int *);
void monitor_apply_keystate(struct monitor *);
void mm_get_keystate(struct monitor *);
void mm_send_keystate(struct monitor*);
/* bsdauth */
int mm_bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **);
int mm_bsdauth_respond(void *, u_int, char **);
/* skey */
int mm_skey_query(void *, char **, char **, u_int *, char ***, u_int **);
int mm_skey_respond(void *, u_int, char **);
/* zlib allocation hooks */
void *mm_zalloc(struct mm_master *, u_int, u_int);
void mm_zfree(struct mm_master *, void *);
void mm_init_compression(struct mm_master *);
#endif /* _MM_H_ */

73
crypto/openssh/msg.c Normal file
View File

@ -0,0 +1,73 @@
/*
* Copyright (c) 2002 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: msg.c,v 1.2 2002/06/19 00:27:55 deraadt Exp $");
#include "buffer.h"
#include "getput.h"
#include "log.h"
#include "atomicio.h"
#include "msg.h"
void
msg_send(int fd, u_char type, Buffer *m)
{
u_char buf[5];
u_int mlen = buffer_len(m);
debug3("msg_send: type %d", type);
PUT_32BIT(buf, mlen + 1);
buf[4] = type; /* 1st byte of payload is mesg-type */
if (atomicio(write, fd, buf, sizeof(buf)) != sizeof(buf))
fatal("msg_send: write");
if (atomicio(write, fd, buffer_ptr(m), mlen) != mlen)
fatal("msg_send: write");
}
int
msg_recv(int fd, Buffer *m)
{
u_char buf[4];
ssize_t res;
u_int msg_len;
debug3("msg_recv entering");
res = atomicio(read, fd, buf, sizeof(buf));
if (res != sizeof(buf)) {
if (res == 0)
return -1;
fatal("msg_recv: read: header %d", res);
}
msg_len = GET_32BIT(buf);
if (msg_len > 256 * 1024)
fatal("msg_recv: read: bad msg_len %d", msg_len);
buffer_clear(m);
buffer_append_space(m, msg_len);
res = atomicio(read, fd, buffer_ptr(m), msg_len);
if (res != msg_len)
fatal("msg_recv: read: %ld != msg_len", (long)res);
return 0;
}

31
crypto/openssh/msg.h Normal file
View File

@ -0,0 +1,31 @@
/* $OpenBSD: msg.h,v 1.1 2002/05/23 19:24:30 markus Exp $ */
/*
* Copyright (c) 2002 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SSH_MSG_H
#define SSH_MSG_H
void msg_send(int, u_char, Buffer *);
int msg_recv(int, Buffer *);
#endif

60
crypto/openssh/nchan.c
View File

@ -23,7 +23,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: nchan.c,v 1.44 2002/01/21 23:27:10 markus Exp $");
RCSID("$OpenBSD: nchan.c,v 1.47 2002/06/19 00:27:55 deraadt Exp $");
#include "ssh1.h"
#include "ssh2.h"
@ -302,6 +302,7 @@ static void
chan_rcvd_eof2(Channel *c)
{
debug("channel %d: rcvd eof", c->self);
c->flags |= CHAN_EOF_RCVD;
if (c->ostate == CHAN_OUTPUT_OPEN)
chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
}
@ -330,6 +331,7 @@ chan_send_eof2(Channel *c)
packet_start(SSH2_MSG_CHANNEL_EOF);
packet_put_int(c->remote_id);
packet_send();
c->flags |= CHAN_EOF_SENT;
break;
default:
error("channel %d: cannot send eof for istate %d",
@ -365,7 +367,8 @@ chan_rcvd_ieof(Channel *c)
else
chan_rcvd_ieof1(c);
if (c->ostate == CHAN_OUTPUT_WAIT_DRAIN &&
buffer_len(&c->output) == 0)
buffer_len(&c->output) == 0 &&
!CHANNEL_EFD_OUTPUT_ACTIVE(c))
chan_obuf_empty(c);
}
void
@ -404,39 +407,30 @@ chan_is_dead(Channel *c, int send)
debug("channel %d: is dead", c->self);
return 1;
}
/*
* we have to delay the close message if the efd (for stderr) is
* still active
*/
if (((c->extended_usage != CHAN_EXTENDED_IGNORE) &&
buffer_len(&c->extended) > 0)
#if 0
|| ((c->extended_usage == CHAN_EXTENDED_READ) &&
c->efd != -1)
#endif
) {
debug2("channel %d: active efd: %d len %d type %s",
c->self, c->efd, buffer_len(&c->extended),
c->extended_usage==CHAN_EXTENDED_READ ?
"read": "write");
} else {
if (!(c->flags & CHAN_CLOSE_SENT)) {
if (send) {
chan_send_close2(c);
} else {
/* channel would be dead if we sent a close */
if (c->flags & CHAN_CLOSE_RCVD) {
debug("channel %d: almost dead",
c->self);
return 1;
}
if ((datafellows & SSH_BUG_EXTEOF) &&
c->extended_usage == CHAN_EXTENDED_WRITE &&
c->efd != -1 &&
buffer_len(&c->extended) > 0) {
debug2("channel %d: active efd: %d len %d",
c->self, c->efd, buffer_len(&c->extended));
return 0;
}
if (!(c->flags & CHAN_CLOSE_SENT)) {
if (send) {
chan_send_close2(c);
} else {
/* channel would be dead if we sent a close */
if (c->flags & CHAN_CLOSE_RCVD) {
debug("channel %d: almost dead",
c->self);
return 1;
}
}
if ((c->flags & CHAN_CLOSE_SENT) &&
(c->flags & CHAN_CLOSE_RCVD)) {
debug("channel %d: is dead", c->self);
return 1;
}
}
if ((c->flags & CHAN_CLOSE_SENT) &&
(c->flags & CHAN_CLOSE_RCVD)) {
debug("channel %d: is dead", c->self);
return 1;
}
return 0;
}

145
crypto/openssh/packet.c
View File

@ -37,7 +37,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: packet.c,v 1.90 2002/02/27 21:23:13 stevesk Exp $");
RCSID("$OpenBSD: packet.c,v 1.95 2002/06/19 18:01:00 markus Exp $");
#include "xmalloc.h"
#include "buffer.h"
@ -60,6 +60,7 @@ RCSID("$OpenBSD: packet.c,v 1.90 2002/02/27 21:23:13 stevesk Exp $");
#include "log.h"
#include "canohost.h"
#include "misc.h"
#include "ssh.h"
#ifdef PACKET_DEBUG
#define DBG(x) x
@ -86,10 +87,10 @@ static CipherContext receive_context;
static CipherContext send_context;
/* Buffer for raw input data from the socket. */
static Buffer input;
Buffer input;
/* Buffer for raw output data going to the socket. */
static Buffer output;
Buffer output;
/* Buffer for the partial outgoing packet being constructed. */
static Buffer outgoing_packet;
@ -115,6 +116,12 @@ static int interactive_mode = 0;
/* Session key information for Encryption and MAC */
Newkeys *newkeys[MODE_MAX];
static u_int32_t read_seqnr = 0;
static u_int32_t send_seqnr = 0;
/* Session key for protocol v1 */
static u_char ssh1_key[SSH_SESSION_KEY_LENGTH];
static u_int ssh1_keylen;
/* roundup current message to extra_pad bytes */
static u_char extra_pad = 0;
@ -171,6 +178,99 @@ packet_connection_is_on_socket(void)
return 1;
}
/*
* Exports an IV from the CipherContext required to export the key
* state back from the unprivileged child to the privileged parent
* process.
*/
void
packet_get_keyiv(int mode, u_char *iv, u_int len)
{
CipherContext *cc;
if (mode == MODE_OUT)
cc = &send_context;
else
cc = &receive_context;
cipher_get_keyiv(cc, iv, len);
}
int
packet_get_keycontext(int mode, u_char *dat)
{
CipherContext *cc;
if (mode == MODE_OUT)
cc = &send_context;
else
cc = &receive_context;
return (cipher_get_keycontext(cc, dat));
}
void
packet_set_keycontext(int mode, u_char *dat)
{
CipherContext *cc;
if (mode == MODE_OUT)
cc = &send_context;
else
cc = &receive_context;
cipher_set_keycontext(cc, dat);
}
int
packet_get_keyiv_len(int mode)
{
CipherContext *cc;
if (mode == MODE_OUT)
cc = &send_context;
else
cc = &receive_context;
return (cipher_get_keyiv_len(cc));
}
void
packet_set_iv(int mode, u_char *dat)
{
CipherContext *cc;
if (mode == MODE_OUT)
cc = &send_context;
else
cc = &receive_context;
cipher_set_keyiv(cc, dat);
}
int
packet_get_ssh1_cipher()
{
return (cipher_get_number(receive_context.cipher));
}
u_int32_t
packet_get_seqnr(int mode)
{
return (mode == MODE_IN ? read_seqnr : send_seqnr);
}
void
packet_set_seqnr(int mode, u_int32_t seqnr)
{
if (mode == MODE_IN)
read_seqnr = seqnr;
else if (mode == MODE_OUT)
send_seqnr = seqnr;
else
fatal("packet_set_seqnr: bad mode %d", mode);
}
/* returns 1 if connection is via ipv4 */
int
@ -291,6 +391,7 @@ packet_start_compression(int level)
* key is used for both sending and reception. However, both directions are
* encrypted independently of each other.
*/
void
packet_set_encryption_key(const u_char *key, u_int keylen,
int number)
@ -300,10 +401,23 @@ packet_set_encryption_key(const u_char *key, u_int keylen,
fatal("packet_set_encryption_key: unknown cipher number %d", number);
if (keylen < 20)
fatal("packet_set_encryption_key: keylen too small: %d", keylen);
if (keylen > SSH_SESSION_KEY_LENGTH)
fatal("packet_set_encryption_key: keylen too big: %d", keylen);
memcpy(ssh1_key, key, keylen);
ssh1_keylen = keylen;
cipher_init(&send_context, cipher, key, keylen, NULL, 0, CIPHER_ENCRYPT);
cipher_init(&receive_context, cipher, key, keylen, NULL, 0, CIPHER_DECRYPT);
}
u_int
packet_get_encryption_key(u_char *key)
{
if (key == NULL)
return (ssh1_keylen);
memcpy(key, ssh1_key, ssh1_keylen);
return (ssh1_keylen);
}
/* Start constructing a packet to send. */
void
packet_start(u_char type)
@ -433,7 +547,7 @@ packet_send1(void)
*/
}
static void
void
set_newkeys(int mode)
{
Enc *enc;
@ -477,8 +591,9 @@ set_newkeys(int mode)
DBG(debug("cipher_init_context: %d", mode));
cipher_init(cc, enc->cipher, enc->key, enc->key_len,
enc->iv, enc->block_size, encrypt);
memset(enc->iv, 0, enc->block_size);
memset(enc->key, 0, enc->key_len);
/* Deleting the keys does not gain extra security */
/* memset(enc->iv, 0, enc->block_size);
memset(enc->key, 0, enc->key_len); */
if (comp->type != 0 && comp->enabled == 0) {
packet_init_compression();
if (mode == MODE_OUT)
@ -495,7 +610,6 @@ set_newkeys(int mode)
static void
packet_send2(void)
{
static u_int32_t seqnr = 0;
u_char type, *cp, *macbuf = NULL;
u_char padlen, pad;
u_int packet_length = 0;
@ -549,7 +663,7 @@ packet_send2(void)
/* will wrap if extra_pad+padlen > 255 */
extra_pad = roundup(extra_pad, block_size);
pad = extra_pad - ((len + padlen) % extra_pad);
debug("packet_send2: adding %d (len %d padlen %d extra_pad %d)",
debug3("packet_send2: adding %d (len %d padlen %d extra_pad %d)",
pad, len, padlen, extra_pad);
padlen += pad;
extra_pad = 0;
@ -576,10 +690,10 @@ packet_send2(void)
/* compute MAC over seqnr and packet(length fields, payload, padding) */
if (mac && mac->enabled) {
macbuf = mac_compute(mac, seqnr,
macbuf = mac_compute(mac, send_seqnr,
buffer_ptr(&outgoing_packet),
buffer_len(&outgoing_packet));
DBG(debug("done calc MAC out #%d", seqnr));
DBG(debug("done calc MAC out #%d", send_seqnr));
}
/* encrypt packet and append to output buffer. */
cp = buffer_append_space(&output, buffer_len(&outgoing_packet));
@ -593,7 +707,7 @@ packet_send2(void)
buffer_dump(&output);
#endif
/* increment sequence number for outgoing packets */
if (++seqnr == 0)
if (++send_seqnr == 0)
log("outgoing seqnr wraps around");
buffer_clear(&outgoing_packet);
@ -783,7 +897,6 @@ packet_read_poll1(void)
static int
packet_read_poll2(u_int32_t *seqnr_p)
{
static u_int32_t seqnr = 0;
static u_int packet_length = 0;
u_int padlen, need;
u_char *macbuf, *cp, type;
@ -845,17 +958,17 @@ packet_read_poll2(u_int32_t *seqnr_p)
* increment sequence number for incoming packet
*/
if (mac && mac->enabled) {
macbuf = mac_compute(mac, seqnr,
macbuf = mac_compute(mac, read_seqnr,
buffer_ptr(&incoming_packet),
buffer_len(&incoming_packet));
if (memcmp(macbuf, buffer_ptr(&input), mac->mac_len) != 0)
packet_disconnect("Corrupted MAC on input.");
DBG(debug("MAC #%d ok", seqnr));
DBG(debug("MAC #%d ok", read_seqnr));
buffer_consume(&input, mac->mac_len);
}
if (seqnr_p != NULL)
*seqnr_p = seqnr;
if (++seqnr == 0)
*seqnr_p = read_seqnr;
if (++read_seqnr == 0)
log("incoming seqnr wraps around");
/* get padlen */

237
crypto/openssh/radix.c
View File

@ -1,5 +1,6 @@
/*
* Copyright (c) 1999 Dug Song. All rights reserved.
* Copyright (c) 2002 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -25,190 +26,132 @@
#include "includes.h"
#include "uuencode.h"
RCSID("$OpenBSD: radix.c,v 1.17 2001/11/19 19:02:16 mpech Exp $");
RCSID("$OpenBSD: radix.c,v 1.21 2002/06/19 00:27:55 deraadt Exp $");
#ifdef AFS
#include <krb.h>
#include <radix.h>
typedef u_char my_u_char;
typedef u_int my_u_int32_t;
typedef u_short my_u_short;
/* Nasty macros from BIND-4.9.2 */
#define GETSHORT(s, cp) { \
my_u_char *t_cp = (my_u_char *)(cp); \
(s) = (((my_u_short)t_cp[0]) << 8) \
| (((my_u_short)t_cp[1])) \
; \
(cp) += 2; \
}
#define GETLONG(l, cp) { \
my_u_char *t_cp = (my_u_char *)(cp); \
(l) = (((my_u_int32_t)t_cp[0]) << 24) \
| (((my_u_int32_t)t_cp[1]) << 16) \
| (((my_u_int32_t)t_cp[2]) << 8) \
| (((my_u_int32_t)t_cp[3])) \
; \
(cp) += 4; \
}
#define PUTSHORT(s, cp) { \
my_u_short t_s = (my_u_short)(s); \
my_u_char *t_cp = (my_u_char *)(cp); \
*t_cp++ = t_s >> 8; \
*t_cp = t_s; \
(cp) += 2; \
}
#define PUTLONG(l, cp) { \
my_u_int32_t t_l = (my_u_int32_t)(l); \
my_u_char *t_cp = (my_u_char *)(cp); \
*t_cp++ = t_l >> 24; \
*t_cp++ = t_l >> 16; \
*t_cp++ = t_l >> 8; \
*t_cp = t_l; \
(cp) += 4; \
}
#define GETSTRING(s, p, p_l) { \
char *p_targ = (p) + p_l; \
char *s_c = (s); \
char *p_c = (p); \
while (*p_c && (p_c < p_targ)) { \
*s_c++ = *p_c++; \
} \
if (p_c == p_targ) { \
return 1; \
} \
*s_c = *p_c++; \
(p_l) = (p_l) - (p_c - (p)); \
(p) = p_c; \
}
#include "bufaux.h"
int
creds_to_radix(CREDENTIALS *creds, u_char *buf, size_t buflen)
{
char *p, *s;
int len;
char temp[2048];
Buffer b;
int ret;
p = temp;
*p++ = 1; /* version */
s = creds->service;
while (*s)
*p++ = *s++;
*p++ = *s;
s = creds->instance;
while (*s)
*p++ = *s++;
*p++ = *s;
s = creds->realm;
while (*s)
*p++ = *s++;
*p++ = *s;
buffer_init(&b);
buffer_put_char(&b, 1); /* version */
buffer_append(&b, creds->service, strlen(creds->service));
buffer_put_char(&b, '\0');
buffer_append(&b, creds->instance, strlen(creds->instance));
buffer_put_char(&b, '\0');
buffer_append(&b, creds->realm, strlen(creds->realm));
buffer_put_char(&b, '\0');
buffer_append(&b, creds->pname, strlen(creds->pname));
buffer_put_char(&b, '\0');
buffer_append(&b, creds->pinst, strlen(creds->pinst));
buffer_put_char(&b, '\0');
s = creds->pname;
while (*s)
*p++ = *s++;
*p++ = *s;
s = creds->pinst;
while (*s)
*p++ = *s++;
*p++ = *s;
/* Null string to repeat the realm. */
*p++ = '\0';
buffer_put_char(&b, '\0');
PUTLONG(creds->issue_date, p);
{
u_int endTime;
endTime = (u_int) krb_life_to_time(creds->issue_date,
creds->lifetime);
PUTLONG(endTime, p);
}
buffer_put_int(&b, creds->issue_date);
buffer_put_int(&b, krb_life_to_time(creds->issue_date,
creds->lifetime));
buffer_append(&b, creds->session, sizeof(creds->session));
buffer_put_short(&b, creds->kvno);
memcpy(p, &creds->session, sizeof(creds->session));
p += sizeof(creds->session);
/* 32 bit size + data */
buffer_put_string(&b, creds->ticket_st.dat, creds->ticket_st.length);
PUTSHORT(creds->kvno, p);
PUTLONG(creds->ticket_st.length, p);
ret = uuencode(buffer_ptr(&b), buffer_len(&b), (char *)buf, buflen);
memcpy(p, creds->ticket_st.dat, creds->ticket_st.length);
p += creds->ticket_st.length;
len = p - temp;
return (uuencode((u_char *)temp, len, (char *)buf, buflen));
buffer_free(&b);
return ret;
}
#define GETSTRING(b, t, tlen) \
do { \
int i, found = 0; \
for (i = 0; i < tlen; i++) { \
if (buffer_len(b) == 0) \
goto done; \
t[i] = buffer_get_char(b); \
if (t[i] == '\0') { \
found = 1; \
break; \
} \
} \
if (!found) \
goto done; \
} while(0)
int
radix_to_creds(const char *buf, CREDENTIALS *creds)
{
Buffer b;
char c, version, *space, *p;
u_int endTime;
int len, blen, ret;
char *p;
int len, tl;
char version;
char temp[2048];
ret = 0;
blen = strlen(buf);
len = uudecode(buf, (u_char *)temp, sizeof(temp));
if (len < 0)
/* sanity check for size */
if (blen > 8192)
return 0;
p = temp;
buffer_init(&b);
space = buffer_append_space(&b, blen);
/* check version and length! */
len = uudecode(buf, space, blen);
if (len < 1)
return 0;
version = *p;
p++;
len--;
goto done;
GETSTRING(creds->service, p, len);
GETSTRING(creds->instance, p, len);
GETSTRING(creds->realm, p, len);
version = buffer_get_char(&b);
GETSTRING(&b, creds->service, sizeof creds->service);
GETSTRING(&b, creds->instance, sizeof creds->instance);
GETSTRING(&b, creds->realm, sizeof creds->realm);
GETSTRING(&b, creds->pname, sizeof creds->pname);
GETSTRING(&b, creds->pinst, sizeof creds->pinst);
if (buffer_len(&b) == 0)
goto done;
GETSTRING(creds->pname, p, len);
GETSTRING(creds->pinst, p, len);
/* Ignore possibly different realm. */
while (*p && len)
p++, len--;
if (len == 0)
return 0;
p++, len--;
while (buffer_len(&b) > 0 && (c = buffer_get_char(&b)) != '\0')
;
/* Enough space for remaining fixed-length parts? */
if (len < (4 + 4 + sizeof(creds->session) + 2 + 4))
return 0;
if (buffer_len(&b) == 0)
goto done;
GETLONG(creds->issue_date, p);
len -= 4;
{
u_int endTime;
GETLONG(endTime, p);
len -= 4;
creds->lifetime = krb_time_to_life(creds->issue_date, endTime);
}
creds->issue_date = buffer_get_int(&b);
memcpy(&creds->session, p, sizeof(creds->session));
p += sizeof(creds->session);
len -= sizeof(creds->session);
endTime = buffer_get_int(&b);
creds->lifetime = krb_time_to_life(creds->issue_date, endTime);
GETSHORT(creds->kvno, p);
len -= 2;
GETLONG(creds->ticket_st.length, p);
len -= 4;
len = buffer_len(&b);
if (len < sizeof(creds->session))
goto done;
memcpy(&creds->session, buffer_ptr(&b), sizeof(creds->session));
buffer_consume(&b, sizeof(creds->session));
tl = creds->ticket_st.length;
if (tl < 0 || tl > len || tl > sizeof(creds->ticket_st.dat))
return 0;
creds->kvno = buffer_get_short(&b);
memcpy(creds->ticket_st.dat, p, tl);
p += tl;
len -= tl;
p = buffer_get_string(&b, &len);
if (len < 0 || len > sizeof(creds->ticket_st.dat))
goto done;
memcpy(&creds->ticket_st.dat, p, len);
creds->ticket_st.length = len;
return 1;
ret = 1;
done:
buffer_free(&b);
return ret;
}
#endif /* AFS */

7
crypto/openssh/readpass.c
View File

@ -23,7 +23,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: readpass.c,v 1.26 2002/02/13 00:39:15 markus Exp $");
RCSID("$OpenBSD: readpass.c,v 1.27 2002/03/26 15:58:46 markus Exp $");
#include <readpassphrase.h>
@ -120,8 +120,11 @@ read_passphrase(const char *prompt, int flags)
return ssh_askpass(askpass, prompt);
}
if (readpassphrase(prompt, buf, sizeof buf, rppflags) == NULL)
if (readpassphrase(prompt, buf, sizeof buf, rppflags) == NULL) {
if (flags & RP_ALLOW_EOF)
return NULL;
return xstrdup("");
}
ret = xstrdup(buf);
memset(buf, 'x', sizeof buf);

3
crypto/openssh/readpass.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: readpass.h,v 1.6 2001/06/26 17:27:24 markus Exp $ */
/* $OpenBSD: readpass.h,v 1.7 2002/03/26 15:58:46 markus Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -14,5 +14,6 @@
#define RP_ECHO 0x0001
#define RP_ALLOW_STDIN 0x0002
#define RP_ALLOW_EOF 0x0004
char *read_passphrase(const char *, int);

303
crypto/openssh/scard.c
View File

@ -24,16 +24,30 @@
#ifdef SMARTCARD
#include "includes.h"
RCSID("$OpenBSD: scard.c,v 1.17 2001/12/27 18:22:16 markus Exp $");
RCSID("$OpenBSD: scard.c,v 1.25 2002/03/26 18:46:59 rees Exp $");
#include <openssl/engine.h>
#include <openssl/evp.h>
#include <sectok.h>
#include "key.h"
#include "log.h"
#include "xmalloc.h"
#include "readpass.h"
#include "scard.h"
#if OPENSSL_VERSION_NUMBER < 0x00907000L
#define USE_ENGINE
#define RSA_get_default_method RSA_get_default_openssl_method
#else
#endif
#ifdef USE_ENGINE
#include <openssl/engine.h>
#define sc_get_rsa sc_get_engine
#else
#define sc_get_rsa sc_get_rsa_method
#endif
#define CLA_SSH 0x05
#define INS_DECRYPT 0x10
#define INS_GET_KEYLENGTH 0x20
@ -42,10 +56,17 @@ RCSID("$OpenBSD: scard.c,v 1.17 2001/12/27 18:22:16 markus Exp $");
#define MAX_BUF_SIZE 256
u_char DEFAUT0[] = {0xad, 0x9f, 0x61, 0xfe, 0xfa, 0x20, 0xce, 0x63};
static int sc_fd = -1;
static char *sc_reader_id = NULL;
static char *sc_pin = NULL;
static int cla = 0x00; /* class */
static void sc_mk_digest(const char *pin, u_char *digest);
static int get_AUT0(u_char *aut0);
static int try_AUT0(void);
/* interface to libsectok */
static int
@ -126,8 +147,7 @@ sc_read_pubkey(Key * k)
n = NULL;
if (sc_fd < 0) {
status = sc_init();
if (status < 0 )
if (sc_init() < 0)
goto err;
}
@ -145,6 +165,12 @@ sc_read_pubkey(Key * k)
n = xmalloc(len);
/* get n */
sectok_apdu(sc_fd, CLA_SSH, INS_GET_PUBKEY, 0, 0, 0, NULL, len, n, &sw);
if (sw == 0x6982) {
if (try_AUT0() < 0)
goto err;
sectok_apdu(sc_fd, CLA_SSH, INS_GET_PUBKEY, 0, 0, 0, NULL, len, n, &sw);
}
if (!sectok_swOK(sw)) {
error("could not obtain public key: %s", sectok_get_sw(sw));
goto err;
@ -178,7 +204,8 @@ sc_read_pubkey(Key * k)
/* private key operations */
static int
sc_private_decrypt(int flen, u_char *from, u_char *to, RSA *rsa, int padding)
sc_private_decrypt(int flen, u_char *from, u_char *to, RSA *rsa,
int padding)
{
u_char *padded = NULL;
int sw, len, olen, status = -1;
@ -197,19 +224,18 @@ sc_private_decrypt(int flen, u_char *from, u_char *to, RSA *rsa, int padding)
len = BN_num_bytes(rsa->n);
padded = xmalloc(len);
sectok_apdu(sc_fd, CLA_SSH, INS_DECRYPT, 0, 0, len, from, 0, NULL, &sw);
sectok_apdu(sc_fd, CLA_SSH, INS_DECRYPT, 0, 0, len, from, len, padded, &sw);
if (sw == 0x6982) {
if (try_AUT0() < 0)
goto err;
sectok_apdu(sc_fd, CLA_SSH, INS_DECRYPT, 0, 0, len, from, len, padded, &sw);
}
if (!sectok_swOK(sw)) {
error("sc_private_decrypt: INS_DECRYPT failed: %s",
sectok_get_sw(sw));
goto err;
}
sectok_apdu(sc_fd, CLA_SSH, INS_GET_RESPONSE, 0, 0, 0, NULL,
len, padded, &sw);
if (!sectok_swOK(sw)) {
error("sc_private_decrypt: INS_GET_RESPONSE failed: %s",
sectok_get_sw(sw));
goto err;
}
olen = RSA_padding_check_PKCS1_type_2(to, len, padded + 1, len - 1,
len);
err:
@ -220,7 +246,8 @@ sc_private_decrypt(int flen, u_char *from, u_char *to, RSA *rsa, int padding)
}
static int
sc_private_encrypt(int flen, u_char *from, u_char *to, RSA *rsa, int padding)
sc_private_encrypt(int flen, u_char *from, u_char *to, RSA *rsa,
int padding)
{
u_char *padded = NULL;
int sw, len, status = -1;
@ -238,20 +265,18 @@ sc_private_encrypt(int flen, u_char *from, u_char *to, RSA *rsa, int padding)
len = BN_num_bytes(rsa->n);
padded = xmalloc(len);
if (RSA_padding_add_PKCS1_type_1(padded, len, from, flen) <= 0) {
if (RSA_padding_add_PKCS1_type_1(padded, len, (u_char *)from, flen) <= 0) {
error("RSA_padding_add_PKCS1_type_1 failed");
goto err;
}
sectok_apdu(sc_fd, CLA_SSH, INS_DECRYPT, 0, 0, len, padded, 0, NULL, &sw);
if (!sectok_swOK(sw)) {
error("sc_private_decrypt: INS_DECRYPT failed: %s",
sectok_get_sw(sw));
goto err;
sectok_apdu(sc_fd, CLA_SSH, INS_DECRYPT, 0, 0, len, padded, len, to, &sw);
if (sw == 0x6982) {
if (try_AUT0() < 0)
goto err;
sectok_apdu(sc_fd, CLA_SSH, INS_DECRYPT, 0, 0, len, padded, len, to, &sw);
}
sectok_apdu(sc_fd, CLA_SSH, INS_GET_RESPONSE, 0, 0, 0, NULL,
len, to, &sw);
if (!sectok_swOK(sw)) {
error("sc_private_decrypt: INS_GET_RESPONSE failed: %s",
error("sc_private_encrypt: INS_DECRYPT failed: %s",
sectok_get_sw(sw));
goto err;
}
@ -275,31 +300,18 @@ sc_finish(RSA *rsa)
return 1;
}
/* engine for overloading private key operations */
static ENGINE *smart_engine = NULL;
static RSA_METHOD smart_rsa =
static RSA_METHOD *
sc_get_rsa_method(void)
{
"sectok",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
0,
NULL,
};
static RSA_METHOD smart_rsa;
const RSA_METHOD *def = RSA_get_default_method();
ENGINE *
sc_get_engine(void)
{
RSA_METHOD *def;
/* use the OpenSSL version */
memcpy(&smart_rsa, def, sizeof(smart_rsa));
def = RSA_get_default_openssl_method();
smart_rsa.name = "sectok";
/* overload */
smart_rsa.rsa_priv_enc = sc_private_encrypt;
@ -309,23 +321,22 @@ sc_get_engine(void)
orig_finish = def->finish;
smart_rsa.finish = sc_finish;
/* just use the OpenSSL version */
smart_rsa.rsa_pub_enc = def->rsa_pub_enc;
smart_rsa.rsa_pub_dec = def->rsa_pub_dec;
smart_rsa.rsa_mod_exp = def->rsa_mod_exp;
smart_rsa.bn_mod_exp = def->bn_mod_exp;
smart_rsa.init = def->init;
smart_rsa.flags = def->flags;
smart_rsa.app_data = def->app_data;
smart_rsa.rsa_sign = def->rsa_sign;
smart_rsa.rsa_verify = def->rsa_verify;
return &smart_rsa;
}
#ifdef USE_ENGINE
static ENGINE *
sc_get_engine(void)
{
static ENGINE *smart_engine = NULL;
if ((smart_engine = ENGINE_new()) == NULL)
fatal("ENGINE_new failed");
ENGINE_set_id(smart_engine, "sectok");
ENGINE_set_name(smart_engine, "libsectok");
ENGINE_set_RSA(smart_engine, &smart_rsa);
ENGINE_set_RSA(smart_engine, sc_get_rsa_method());
ENGINE_set_DSA(smart_engine, DSA_get_default_openssl_method());
ENGINE_set_DH(smart_engine, DH_get_default_openssl_method());
ENGINE_set_RAND(smart_engine, RAND_SSLeay());
@ -333,6 +344,7 @@ sc_get_engine(void)
return smart_engine;
}
#endif
void
sc_close(void)
@ -343,16 +355,20 @@ sc_close(void)
}
}
Key *
sc_get_key(const char *id)
Key **
sc_get_keys(const char *id, const char *pin)
{
Key *k;
int status;
Key *k, *n, **keys;
int status, nkeys = 2;
if (sc_reader_id != NULL)
xfree(sc_reader_id);
sc_reader_id = xstrdup(id);
if (sc_pin != NULL)
xfree(sc_pin);
sc_pin = (pin == NULL) ? NULL : xstrdup(pin);
k = key_new(KEY_RSA);
if (k == NULL) {
return NULL;
@ -367,6 +383,175 @@ sc_get_key(const char *id)
key_free(k);
return NULL;
}
return k;
keys = xmalloc((nkeys+1) * sizeof(Key *));
n = key_new(KEY_RSA1);
BN_copy(n->rsa->n, k->rsa->n);
BN_copy(n->rsa->e, k->rsa->e);
RSA_set_method(n->rsa, sc_get_rsa());
n->flags |= KEY_FLAG_EXT;
keys[0] = n;
n = key_new(KEY_RSA);
BN_copy(n->rsa->n, k->rsa->n);
BN_copy(n->rsa->e, k->rsa->e);
RSA_set_method(n->rsa, sc_get_rsa());
n->flags |= KEY_FLAG_EXT;
keys[1] = n;
keys[2] = NULL;
key_free(k);
return keys;
}
#define NUM_RSA_KEY_ELEMENTS 5+1
#define COPY_RSA_KEY(x, i) \
do { \
len = BN_num_bytes(prv->rsa->x); \
elements[i] = xmalloc(len); \
debug("#bytes %d", len); \
if (BN_bn2bin(prv->rsa->x, elements[i]) < 0) \
goto done; \
} while (0)
static void
sc_mk_digest(const char *pin, u_char *digest)
{
const EVP_MD *evp_md = EVP_sha1();
EVP_MD_CTX md;
EVP_DigestInit(&md, evp_md);
EVP_DigestUpdate(&md, pin, strlen(pin));
EVP_DigestFinal(&md, digest, NULL);
}
static int
get_AUT0(u_char *aut0)
{
char *pass;
pass = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN);
if (pass == NULL)
return -1;
if (!strcmp(pass, "-")) {
memcpy(aut0, DEFAUT0, sizeof DEFAUT0);
return 0;
}
sc_mk_digest(pass, aut0);
memset(pass, 0, strlen(pass));
xfree(pass);
return 0;
}
static int
try_AUT0(void)
{
u_char aut0[EVP_MAX_MD_SIZE];
/* permission denied; try PIN if provided */
if (sc_pin && strlen(sc_pin) > 0) {
sc_mk_digest(sc_pin, aut0);
if (cyberflex_verify_AUT0(sc_fd, cla, aut0, 8) < 0) {
error("smartcard passphrase incorrect");
return (-1);
}
} else {
/* try default AUT0 key */
if (cyberflex_verify_AUT0(sc_fd, cla, DEFAUT0, 8) < 0) {
/* default AUT0 key failed; prompt for passphrase */
if (get_AUT0(aut0) < 0 ||
cyberflex_verify_AUT0(sc_fd, cla, aut0, 8) < 0) {
error("smartcard passphrase incorrect");
return (-1);
}
}
}
return (0);
}
int
sc_put_key(Key *prv, const char *id)
{
u_char *elements[NUM_RSA_KEY_ELEMENTS];
u_char key_fid[2];
u_char AUT0[EVP_MAX_MD_SIZE];
int len, status = -1, i, fd = -1, ret;
int sw = 0, cla = 0x00;
for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
elements[i] = NULL;
COPY_RSA_KEY(q, 0);
COPY_RSA_KEY(p, 1);
COPY_RSA_KEY(iqmp, 2);
COPY_RSA_KEY(dmq1, 3);
COPY_RSA_KEY(dmp1, 4);
COPY_RSA_KEY(n, 5);
len = BN_num_bytes(prv->rsa->n);
fd = sectok_friendly_open(id, STONOWAIT, &sw);
if (fd < 0) {
error("sectok_open failed: %s", sectok_get_sw(sw));
goto done;
}
if (! sectok_cardpresent(fd)) {
error("smartcard in reader %s not present", id);
goto done;
}
ret = sectok_reset(fd, 0, NULL, &sw);
if (ret <= 0) {
error("sectok_reset failed: %s", sectok_get_sw(sw));
goto done;
}
if ((cla = cyberflex_inq_class(fd)) < 0) {
error("cyberflex_inq_class failed");
goto done;
}
memcpy(AUT0, DEFAUT0, sizeof(DEFAUT0));
if (cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
if (get_AUT0(AUT0) < 0 ||
cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
memset(AUT0, 0, sizeof(DEFAUT0));
error("smartcard passphrase incorrect");
goto done;
}
}
memset(AUT0, 0, sizeof(DEFAUT0));
key_fid[0] = 0x00;
key_fid[1] = 0x12;
if (cyberflex_load_rsa_priv(fd, cla, key_fid, 5, 8*len, elements,
&sw) < 0) {
error("cyberflex_load_rsa_priv failed: %s", sectok_get_sw(sw));
goto done;
}
if (!sectok_swOK(sw))
goto done;
log("cyberflex_load_rsa_priv done");
key_fid[0] = 0x73;
key_fid[1] = 0x68;
if (cyberflex_load_rsa_pub(fd, cla, key_fid, len, elements[5],
&sw) < 0) {
error("cyberflex_load_rsa_pub failed: %s", sectok_get_sw(sw));
goto done;
}
if (!sectok_swOK(sw))
goto done;
log("cyberflex_load_rsa_pub done");
status = 0;
done:
memset(elements[0], '\0', BN_num_bytes(prv->rsa->q));
memset(elements[1], '\0', BN_num_bytes(prv->rsa->p));
memset(elements[2], '\0', BN_num_bytes(prv->rsa->iqmp));
memset(elements[3], '\0', BN_num_bytes(prv->rsa->dmq1));
memset(elements[4], '\0', BN_num_bytes(prv->rsa->dmp1));
memset(elements[5], '\0', BN_num_bytes(prv->rsa->n));
for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
if (elements[i])
xfree(elements[i]);
if (fd != -1)
sectok_close(fd);
return (status);
}
#endif /* SMARTCARD */

10
crypto/openssh/scard.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: scard.h,v 1.7 2002/03/04 17:27:39 stevesk Exp $ */
/* $OpenBSD: scard.h,v 1.10 2002/03/25 17:34:27 markus Exp $ */
/*
* Copyright (c) 2001 Markus Friedl. All rights reserved.
@ -24,17 +24,17 @@
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <openssl/engine.h>
#ifndef SCARD_H
#define SCARD_H
#include "key.h"
#define SCARD_ERROR_FAIL -1
#define SCARD_ERROR_NOCARD -2
#define SCARD_ERROR_APPLET -3
Key *sc_get_key(const char*);
ENGINE *sc_get_engine(void);
Key **sc_get_keys(const char*, const char*);
void sc_close(void);
int sc_put_key(Key *, const char*);
#endif

27
crypto/openssh/scard/Ssh.bin.uu
View File

@ -1,16 +1,17 @@
begin 644 Ssh.bin
M`P)!%P`501P`;``!`C@"`/Y@\`4`_J'P!0!!%T$;`?Z@\`4`01=!&@'^>/,!
M`4$701P!_G#S%P'^0],1`?Y@\!0`_G/S'0#^<]4``D$7L`4`_F'3``!!%T$9
M`?YATP4`_G/5"P7^8=,'`OZAT`$!_J#0$@1!%T$8`0```$$7!`$&`/Y@`;@`
M`$$8\`H(`$$9\`H``$$:\@\``$$;\B$``$$<\A```/`&__(```0(`!8```9C
M""T#"<(H+00$*"T%""A;`&19``#P$/_R`P(&`0#(```38`!!70!&$UP`1@09
M":1+``D*D`!@`"@37`!&!!E6`````*(````$____P````*$````0````*@``
M`"````"-````,````&H37`!&`QD(2@`)"FX`8``H$UP`1@<9"@#_/2!@`$L1
M2@`)"F<`8``H$UP`'A-<`$8($1-<`$8(7@!0"!%@`%59"C\`8`!:*PIS:&``
M6BL37`!&`P,*`(!@`%\K`PH`@&``55D37`!&`P<H$UP`1@0#*`,%8`!565D*
M;0!@`"A9`/`"__(!`0$)``@```J0`&``*%D`\!/_\@$!`@D`#```8D$7+5\`
M/"M9````\!+_]@$!`P$`&```$UP`'EX`,D4`#Q-<`!X*`,@)$%X`-P17L`7_
M\@$!!`(`/```$U\``!-B_J$M7P`%70`*$V+^H"U?``]=`!038OYX+0H$`%\`
<&5T`'@H$`&``(T4`"0IG`&``*!->`"U9````````
M`P)!&P`801X`>``!`E@"`/Y@\`4`_J'P!0!!&T$=`?Z@\`4`01M!'`'^>/,!
M`4$;01X!_G#S%P'^0],1`?Y@\!0`_G/S'0#^<]4``D$;L`4`_F'3``#^8=,%
M`/ZAT`$!_J#0)P'^H],*`?ZCTPD`_G/5"P7^8=,'`OZAT`H`_J#0$@3^:-,@
M`T$;`P`%`/Y@`<P``$$<\@\``$$=\B$``$$>\A```/`0__(%`@8!`0H``&``
M0205!!D)I$L`"0J0`&``*!4$&58``````.P````%____P````.D````0````
M,P```"````#'````,````(T````R````V!4#&0A*``D*;@!@`"@5!QD*`/\]
M(6``1A)*``D*9P!@`"@*/P!@`$LK"1)@`$LK!6``4!P$#00#2@`.#01@`%5@
M`%I@`"@37``>%0@2%0A>`%\($F``9%(`:`H_`&``2RL*<VA@`$LK8`!I"1`U
M(14#`Q)@`&X<!`T$`TL`"P,28`!D4@`.#01@`%5@`%I@`"A2`"X5`PH$`&``
M<RL#!6``9%(`'14#"@$"8`!S*P,%8`!D4@`,4@`)"FT`8``H60``\`+_\@$!
M`0D`"```"I``8``H60#P$__R`0$""0`,``!B01LM7P`\*UD```#P$O_V`0$#
M`0`8```37``>7@`R10`/$UP`'@H`R`D07@`W!%>P!?_R`0$$`@`\```37P``
M$V+^H2U?``5=``H38OZ@+5\`#UT`%!-B_G@M"@0`7P`970`>"@0`8``C10`)
/"F<`8``H$UX`+5D`````
`
end

59
crypto/openssh/scard/Ssh.java
View File

@ -1,4 +1,4 @@
// $Id: Ssh.java,v 1.2 2001/07/30 20:08:14 rees Exp $
// $Id: Ssh.java,v 1.3 2002/03/21 22:44:05 rees Exp $
//
// Ssh.java
// SSH / smartcard integration project, smartcard side
@ -42,6 +42,9 @@ import javacardx.crypto.*;
public class Ssh extends javacard.framework.Applet
{
// Change this when the applet changes; hi byte is major, low byte is minor
static final short applet_version = (short)0x0102;
/* constants declaration */
// code of CLA byte in the command APDU header
static final byte Ssh_CLA =(byte)0x05;
@ -50,20 +53,19 @@ public class Ssh extends javacard.framework.Applet
static final byte DECRYPT = (byte) 0x10;
static final byte GET_KEYLENGTH = (byte) 0x20;
static final byte GET_PUBKEY = (byte) 0x30;
static final byte GET_VERSION = (byte) 0x32;
static final byte GET_RESPONSE = (byte) 0xc0;
/* instance variables declaration */
static final short keysize = 1024;
static final short root_fid = (short)0x3f00;
static final short privkey_fid = (short)0x0012;
static final short pubkey_fid = (short)(('s'<<8)|'h');
//RSA_CRT_PrivateKey rsakey;
/* instance variables declaration */
AsymKey rsakey;
CyberflexFile file;
CyberflexOS os;
byte buffer[];
static byte[] keyHdr = {(byte)0xC2, (byte)0x01, (byte)0x05};
private Ssh()
{
file = new CyberflexFile();
@ -98,7 +100,8 @@ public class Ssh extends javacard.framework.Applet
// APDU object carries a byte array (buffer) to
// transfer incoming and outgoing APDU header
// and data bytes between card and CAD
buffer = apdu.getBuffer();
byte buffer[] = apdu.getBuffer();
short size, st;
// verify that if the applet can accept this
// APDU message
@ -111,29 +114,47 @@ public class Ssh extends javacard.framework.Applet
if (buffer[ISO.OFFSET_CLA] != Ssh_CLA)
ISOException.throwIt(ISO.SW_CLA_NOT_SUPPORTED);
//decrypt (apdu);
short size = (short) (buffer[ISO.OFFSET_LC] & 0x00FF);
size = (short) (buffer[ISO.OFFSET_LC] & 0x00FF);
if (apdu.setIncomingAndReceive() != size)
ISOException.throwIt (ISO.SW_WRONG_LENGTH);
// check access; depends on bit 2 (x/a)
file.selectFile(root_fid);
file.selectFile(privkey_fid);
st = os.checkAccess(ACL.EXECUTE);
if (st != ST.ACCESS_CLEARED) {
CyberflexAPDU.prepareSW1SW2(st);
ISOException.throwIt(CyberflexAPDU.getSW1SW2());
}
rsakey.cryptoUpdate (buffer, (short) ISO.OFFSET_CDATA, size,
buffer, (short) ISO.OFFSET_CDATA);
apdu.setOutgoingAndSend ((short) ISO.OFFSET_CDATA, size);
return;
break;
case GET_PUBKEY:
file.selectFile((short)(0x3f<<8)); // select root
file.selectFile((short)(('s'<<8)|'h')); // select public key file
os.readBinaryFile (buffer, (short)0, (short)0, (short)(keysize/8));
apdu.setOutgoingAndSend((short)0, (short)(keysize/8));
return;
file.selectFile(root_fid); // select root
file.selectFile(pubkey_fid); // select public key file
size = (short)(file.getFileSize() - 16);
st = os.readBinaryFile(buffer, (short)0, (short)0, size);
if (st == ST.SUCCESS)
apdu.setOutgoingAndSend((short)0, size);
else {
CyberflexAPDU.prepareSW1SW2(st);
ISOException.throwIt(CyberflexAPDU.getSW1SW2());
}
break;
case GET_KEYLENGTH:
buffer[0] = (byte)((keysize >> 8) & 0xff);
buffer[1] = (byte)(keysize & 0xff);
Util.setShort(buffer, (short)0, keysize);
apdu.setOutgoingAndSend ((short)0, (short)2);
return;
break;
case GET_VERSION:
Util.setShort(buffer, (short)0, applet_version);
apdu.setOutgoingAndSend ((short)0, (short)2);
break;
case GET_RESPONSE:
return;
break;
default:
ISOException.throwIt (ISO.SW_INS_NOT_SUPPORTED);
}

9
crypto/openssh/scp.1
View File

@ -9,7 +9,7 @@
.\"
.\" Created: Sun May 7 00:14:37 1995 ylo
.\"
.\" $OpenBSD: scp.1,v 1.21 2002/01/29 23:50:37 markus Exp $
.\" $OpenBSD: scp.1,v 1.22 2002/06/20 20:00:05 stevesk Exp $
.\"
.Dd September 25, 1999
.Dt SCP 1
@ -117,9 +117,9 @@ options.
.It Fl o Ar ssh_option
Can be used to pass options to
.Nm ssh
in the format used in the
.Xr ssh 1
configuration file. This is useful for specifying options
in the format used in
.Xr ssh_config 5 .
This is useful for specifying options
for which there is no separate
.Nm scp
command-line flag. For example, forcing the use of protocol
@ -152,4 +152,5 @@ California.
.Xr ssh-add 1 ,
.Xr ssh-agent 1 ,
.Xr ssh-keygen 1 ,
.Xr ssh_config 5
.Xr sshd 8

29
crypto/openssh/scp.c
View File

@ -75,7 +75,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: scp.c,v 1.86 2001/12/05 03:56:39 itojun Exp $");
RCSID("$OpenBSD: scp.c,v 1.91 2002/06/19 00:27:55 deraadt Exp $");
#include "xmalloc.h"
#include "atomicio.h"
@ -219,10 +219,9 @@ main(argc, argv)
extern int optind;
args.list = NULL;
addargs(&args, "ssh"); /* overwritten with ssh_program */
addargs(&args, "ssh"); /* overwritten with ssh_program */
addargs(&args, "-x");
addargs(&args, "-oForwardAgent no");
addargs(&args, "-oFallBackToRsh no");
addargs(&args, "-oClearAllForwardings yes");
fflag = tflag = 0;
@ -354,8 +353,7 @@ toremote(targ, argc, argv)
src = colon(argv[i]);
if (src) { /* remote to remote */
static char *ssh_options =
"-x -o'FallBackToRsh no' "
"-o'ClearAllForwardings yes'";
"-x -o'ClearAllForwardings yes'";
*src++ = 0;
if (*src == 0)
src = ".";
@ -756,7 +754,7 @@ sink(argc, argv)
cursize = need;
}
(void) snprintf(namebuf, need, "%s%s%s", targ,
*targ ? "/" : "", cp);
strcmp(targ, "/") ? "/" : "", cp);
np = namebuf;
} else
np = targ;
@ -931,9 +929,9 @@ void
usage(void)
{
(void) fprintf(stderr,
"usage: scp [-pqrvBC46] [-F config] [-S ssh] [-P port] [-c cipher] [-i identity]\n"
" [-o option] f1 f2\n"
" or: scp [options] f1 ... fn directory\n");
"usage: scp [-pqrvBC46] [-F config] [-S program] [-P port]\n"
" [-c cipher] [-i identity] [-o option]\n"
" [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
exit(1);
}
@ -1073,7 +1071,7 @@ progressmeter(int flag)
off_t cursize, abbrevsize;
double elapsed;
int ratio, barlength, i, remaining;
char buf[256];
char buf[512];
if (flag == -1) {
(void) gettimeofday(&start, (struct timezone *) 0);
@ -1099,10 +1097,13 @@ progressmeter(int flag)
i = barlength * ratio / 100;
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
"|%.*s%*s|", i,
"***************************************"
"***************************************"
"***************************************"
"***************************************",
"*******************************************************"
"*******************************************************"
"*******************************************************"
"*******************************************************"
"*******************************************************"
"*******************************************************"
"*******************************************************",
barlength - i, "");
}
i = 0;

38
crypto/openssh/session.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: session.h,v 1.14 2002/02/03 17:53:25 markus Exp $ */
/* $OpenBSD: session.h,v 1.17 2002/03/29 18:59:32 markus Exp $ */
/*
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
@ -26,12 +26,46 @@
#ifndef SESSION_H
#define SESSION_H
#define TTYSZ 64
typedef struct Session Session;
struct Session {
int used;
int self;
struct passwd *pw;
Authctxt *authctxt;
pid_t pid;
/* tty */
char *term;
int ptyfd, ttyfd, ptymaster;
int row, col, xpixel, ypixel;
char tty[TTYSZ];
/* last login */
char hostname[MAXHOSTNAMELEN];
time_t last_login_time;
/* X11 */
int display_number;
char *display;
int screen;
char *auth_display;
char *auth_proto;
char *auth_data;
int single_connection;
/* proto 2 */
int chanid;
int is_subsystem;
};
void do_authenticated(Authctxt *);
int session_open(Authctxt*, int);
int session_input_channel_req(Channel *, const char *);
void session_close_by_pid(pid_t, int);
void session_close_by_channel(int, void *);
void session_destroy_all(void);
void session_destroy_all(void (*)(Session *));
void session_pty_cleanup2(void *);
Session *session_new(void);
Session *session_by_tty(char *);
void session_close(Session *);
void do_setusercontext(struct passwd *);
#endif

64
crypto/openssh/sftp-client.c
View File

@ -28,7 +28,7 @@
/* XXX: copy between two remote sites */
#include "includes.h"
RCSID("$OpenBSD: sftp-client.c,v 1.24 2002/02/24 16:57:19 markus Exp $");
RCSID("$OpenBSD: sftp-client.c,v 1.32 2002/06/09 13:32:01 markus Exp $");
#include <sys/queue.h>
@ -270,7 +270,7 @@ do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
/* Some filexfer v.0 servers don't support large packets */
if (version == 0)
ret->transfer_buflen = MAX(ret->transfer_buflen, 20480);
ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
return(ret);
}
@ -445,7 +445,7 @@ do_rm(struct sftp_conn *conn, char *path)
debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
id = conn->msg_id++;
send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
strlen(path));
status = get_status(conn->fd_in, id);
if (status != SSH2_FX_OK)
@ -492,8 +492,8 @@ do_stat(struct sftp_conn *conn, char *path, int quiet)
id = conn->msg_id++;
send_string_request(conn->fd_out, id,
conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
send_string_request(conn->fd_out, id,
conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
path, strlen(path));
return(get_decode_stat(conn->fd_in, id, quiet));
@ -508,8 +508,8 @@ do_lstat(struct sftp_conn *conn, char *path, int quiet)
if (quiet)
debug("Server version does not support lstat operation");
else
error("Server version does not support lstat operation");
return(NULL);
log("Server version does not support lstat operation");
return(do_stat(conn, path, quiet));
}
id = conn->msg_id++;
@ -723,7 +723,7 @@ send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
char *handle, u_int handle_len)
{
Buffer msg;
buffer_init(&msg);
buffer_clear(&msg);
buffer_put_char(&msg, SSH2_FXP_READ);
@ -733,7 +733,7 @@ send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
buffer_put_int(&msg, len);
send_msg(fd_out, &msg);
buffer_free(&msg);
}
}
int
do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
@ -750,7 +750,7 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
u_int id;
u_int len;
u_int64_t offset;
TAILQ_ENTRY(request) tq;
TAILQ_ENTRY(request) tq;
};
TAILQ_HEAD(reqhead, request) requests;
struct request *req;
@ -816,8 +816,10 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
/* Send some more requests */
while (num_req < max_req) {
debug3("Request range %llu -> %llu (%d/%d)",
offset, offset + buflen - 1, num_req, max_req);
debug3("Request range %llu -> %llu (%d/%d)",
(unsigned long long)offset,
(unsigned long long)offset + buflen - 1,
num_req, max_req);
req = xmalloc(sizeof(*req));
req->id = conn->msg_id++;
req->len = buflen;
@ -825,7 +827,7 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
offset += buflen;
num_req++;
TAILQ_INSERT_TAIL(&requests, req, tq);
send_read_request(conn->fd_out, req->id, req->offset,
send_read_request(conn->fd_out, req->id, req->offset,
req->len, handle, handle_len);
}
@ -855,8 +857,9 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
break;
case SSH2_FXP_DATA:
data = buffer_get_string(&msg, &len);
debug3("Received data %llu -> %llu", req->offset,
req->offset + len - 1);
debug3("Received data %llu -> %llu",
(unsigned long long)req->offset,
(unsigned long long)req->offset + len - 1);
if (len > req->len)
fatal("Received more data than asked for "
"%d > %d", len, req->len);
@ -876,12 +879,14 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
} else {
/* Resend the request for the missing data */
debug3("Short data block, re-requesting "
"%llu -> %llu (%2d)", req->offset + len,
req->offset + req->len - 1, num_req);
"%llu -> %llu (%2d)",
(unsigned long long)req->offset + len,
(unsigned long long)req->offset +
req->len - 1, num_req);
req->id = conn->msg_id++;
req->len -= len;
req->offset += len;
send_read_request(conn->fd_out, req->id,
send_read_request(conn->fd_out, req->id,
req->offset, req->len, handle, handle_len);
/* Reduce the request size */
if (len < buflen)
@ -892,7 +897,8 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
/* Only one request at a time
* after the expected EOF */
debug3("Finish at %llu (%2d)",
offset, num_req);
(unsigned long long)offset,
num_req);
max_req = 1;
}
else if (max_req < conn->num_requests + 1) {
@ -911,7 +917,7 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
fatal("Transfer complete, but requests still in queue");
if (read_error) {
error("Couldn't read from remote file \"%s\" : %s",
error("Couldn't read from remote file \"%s\" : %s",
remote_path, fx2txt(status));
do_close(conn, handle, handle_len);
} else if (write_error) {
@ -960,7 +966,7 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
u_int id;
u_int len;
u_int64_t offset;
TAILQ_ENTRY(outstanding_ack) tq;
TAILQ_ENTRY(outstanding_ack) tq;
};
TAILQ_HEAD(ackhead, outstanding_ack) acks;
struct outstanding_ack *ack;
@ -1042,19 +1048,21 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
buffer_put_string(&msg, data, len);
send_msg(conn->fd_out, &msg);
debug3("Sent message SSH2_FXP_WRITE I:%d O:%llu S:%u",
id, (u_int64_t)offset, len);
id, (unsigned long long)offset, len);
} else if (TAILQ_FIRST(&acks) == NULL)
break;
if (ack == NULL)
fatal("Unexpected ACK %u", id);
if (id == startid || len == 0 ||
if (id == startid || len == 0 ||
id - ackid >= conn->num_requests) {
u_int r_id;
buffer_clear(&msg);
get_msg(conn->fd_in, &msg);
type = buffer_get_char(&msg);
id = buffer_get_int(&msg);
r_id = buffer_get_int(&msg);
if (type != SSH2_FXP_STATUS)
fatal("Expected SSH2_FXP_STATUS(%d) packet, "
@ -1065,11 +1073,11 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
/* Find the request in our queue */
for(ack = TAILQ_FIRST(&acks);
ack != NULL && ack->id != id;
ack != NULL && ack->id != r_id;
ack = TAILQ_NEXT(ack, tq))
;
if (ack == NULL)
fatal("Can't find request for ID %d", id);
fatal("Can't find request for ID %d", r_id);
TAILQ_REMOVE(&acks, ack, tq);
if (status != SSH2_FX_OK) {
@ -1079,8 +1087,8 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
close(local_fd);
goto done;
}
debug3("In write loop, ack for %u %d bytes at %llu",
ack->id, ack->len, ack->offset);
debug3("In write loop, ack for %u %d bytes at %llu",
ack->id, ack->len, (unsigned long long)ack->offset);
++ackid;
free(ack);
}

4
crypto/openssh/sftp-glob.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sftp-glob.h,v 1.6 2002/02/13 00:59:23 djm Exp $ */
/* $OpenBSD: sftp-glob.h,v 1.7 2002/03/19 10:49:35 markus Exp $ */
/*
* Copyright (c) 2001,2002 Damien Miller. All rights reserved.
@ -32,7 +32,7 @@
#include "sftp-client.h"
int
remote_glob(struct sftp_conn *, const char *, int,
remote_glob(struct sftp_conn *, const char *, int,
int (*)(const char *, int), glob_t *);
#endif

9
crypto/openssh/sftp-int.c
View File

@ -26,7 +26,7 @@
/* XXX: recursive operations */
#include "includes.h"
RCSID("$OpenBSD: sftp-int.c,v 1.44 2002/02/13 00:59:23 djm Exp $");
RCSID("$OpenBSD: sftp-int.c,v 1.46 2002/03/30 18:51:15 markus Exp $");
#include <glob.h>
@ -178,8 +178,9 @@ local_do_shell(const char *args)
strerror(errno));
_exit(1);
}
if (waitpid(pid, &status, 0) == -1)
fatal("Couldn't wait for child: %s", strerror(errno));
while (waitpid(pid, &status, 0) == -1)
if (errno != EINTR)
fatal("Couldn't wait for child: %s", strerror(errno));
if (!WIFEXITED(status))
error("Shell exited abormally");
else if (WEXITSTATUS(status))
@ -888,8 +889,10 @@ interactive_loop(int fd_in, int fd_out, char *file1, char *file2)
file2);
parse_dispatch_command(conn, cmd, &pwd);
xfree(dir);
return;
}
xfree(dir);
}
setvbuf(stdout, NULL, _IOLBF, 0);
setvbuf(infile, NULL, _IOLBF, 0);

20
crypto/openssh/sftp-server.c
View File

@ -22,7 +22,7 @@
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: sftp-server.c,v 1.33 2002/02/13 00:28:13 markus Exp $");
RCSID("$OpenBSD: sftp-server.c,v 1.35 2002/06/06 17:30:11 markus Exp $");
#include "buffer.h"
#include "bufaux.h"
@ -362,7 +362,7 @@ process_init(void)
{
Buffer msg;
version = buffer_get_int(&iqueue);
version = get_int();
TRACE("client version %d", version);
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_VERSION);
@ -936,10 +936,13 @@ static void
process(void)
{
u_int msg_len;
u_int buf_len;
u_int consumed;
u_int type;
u_char *cp;
if (buffer_len(&iqueue) < 5)
buf_len = buffer_len(&iqueue);
if (buf_len < 5)
return; /* Incomplete message. */
cp = buffer_ptr(&iqueue);
msg_len = GET_32BIT(cp);
@ -947,9 +950,10 @@ process(void)
error("bad message ");
exit(11);
}
if (buffer_len(&iqueue) < msg_len + 4)
if (buf_len < msg_len + 4)
return;
buffer_consume(&iqueue, 4);
buf_len -= 4;
type = buffer_get_char(&iqueue);
switch (type) {
case SSH2_FXP_INIT:
@ -1016,6 +1020,14 @@ process(void)
error("Unknown message %d", type);
break;
}
/* discard the remaining bytes from the current packet */
if (buf_len < buffer_len(&iqueue))
fatal("iqueue grows");
consumed = buf_len - buffer_len(&iqueue);
if (msg_len < consumed)
fatal("msg_len %d < consumed %d", msg_len, consumed);
if (msg_len > consumed)
buffer_consume(&iqueue, msg_len - consumed);
}
int

17
crypto/openssh/sftp.1
View File

@ -1,4 +1,4 @@
.\" $OpenBSD: sftp.1,v 1.33 2002/02/26 19:06:43 deraadt Exp $
.\" $OpenBSD: sftp.1,v 1.35 2002/06/20 20:00:05 stevesk Exp $
.\"
.\" Copyright (c) 2001 Damien Miller. All rights reserved.
.\"
@ -83,9 +83,9 @@ and
.It Fl o Ar ssh_option
Can be used to pass options to
.Nm ssh
in the format used in the
.Xr ssh 1
configuration file. This is useful for specifying options
in the format used in
.Xr ssh_config 5 .
This is useful for specifying options
for which there is no separate
.Nm sftp
command-line flag. For example, to specify an alternate
@ -100,7 +100,7 @@ does not have an sftp subsystem configured.
.It Fl v
Raise logging level. This option is also passed to ssh.
.It Fl B Ar buffer_size
Specify the size of the buffer that
Specify the size of the buffer that
.Nm
uses when transferring files. Larger buffers require fewer round trips at
the cost of higher memory consumption. The default is 32768 bytes.
@ -115,13 +115,13 @@ per-user configuration file for
This option is directly passed to
.Xr ssh 1 .
.It Fl P Ar sftp_server path
Connect directly to a local
.Nm sftp-server
Connect directly to a local
.Nm sftp-server
(rather than via
.Nm ssh )
This option may be useful in debugging the client and server.
.It Fl R Ar num_requests
Specify how many requests may be outstanding at any one time. Increasing
Specify how many requests may be outstanding at any one time. Increasing
this may slightly improve file transfer speed but will increase memory
usage. The default is 16 outstanding requests.
.It Fl S Ar program
@ -263,6 +263,7 @@ Damien Miller <djm@mindrot.org>
.Xr ssh 1 ,
.Xr ssh-add 1 ,
.Xr ssh-keygen 1 ,
.Xr ssh_config 5 ,
.Xr sftp-server 8 ,
.Xr sshd 8
.Rs

21
crypto/openssh/sftp.c
View File

@ -24,7 +24,7 @@
#include "includes.h"
RCSID("$OpenBSD: sftp.c,v 1.26 2002/02/12 12:32:27 djm Exp $");
RCSID("$OpenBSD: sftp.c,v 1.29 2002/04/02 17:37:48 markus Exp $");
/* XXX: short-form remote directory listings (like 'ls -C') */
@ -88,7 +88,7 @@ static void
usage(void)
{
extern char *__progname;
fprintf(stderr,
"usage: %s [-vC1] [-b batchfile] [-o option] [-s subsystem|path] [-B buffer_size]\n"
" [-F config] [-P direct server path] [-S program]\n"
@ -165,7 +165,7 @@ main(int argc, char **argv)
case 'R':
num_requests = strtol(optarg, &cp, 10);
if (num_requests == 0 || *cp != '\0')
fatal("Invalid number of requests \"%s\"",
fatal("Invalid number of requests \"%s\"",
optarg);
break;
case 'h':
@ -174,6 +174,8 @@ main(int argc, char **argv)
}
}
log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
if (sftp_direct == NULL) {
if (optind == argc || argc > (optind + 2))
usage();
@ -203,7 +205,6 @@ main(int argc, char **argv)
usage();
}
log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
addargs(&args, "-oProtocol %d", sshver);
/* no subsystem if the server-spec contains a '/' */
@ -211,19 +212,19 @@ main(int argc, char **argv)
addargs(&args, "-s");
addargs(&args, "%s", host);
addargs(&args, "%s", (sftp_server != NULL ?
addargs(&args, "%s", (sftp_server != NULL ?
sftp_server : "sftp"));
args.list[0] = ssh_program;
fprintf(stderr, "Connecting to %s...\n", host);
connect_to_server(ssh_program, args.list, &in, &out,
connect_to_server(ssh_program, args.list, &in, &out,
&sshpid);
} else {
args.list = NULL;
addargs(&args, "sftp-server");
fprintf(stderr, "Attaching to %s...\n", sftp_direct);
connect_to_server(sftp_direct, args.list, &in, &out,
connect_to_server(sftp_direct, args.list, &in, &out,
&sshpid);
}
@ -234,8 +235,10 @@ main(int argc, char **argv)
if (infile != stdin)
fclose(infile);
if (waitpid(sshpid, NULL, 0) == -1)
fatal("Couldn't wait for ssh process: %s", strerror(errno));
while (waitpid(sshpid, NULL, 0) == -1)
if (errno != EINTR)
fatal("Couldn't wait for ssh process: %s",
strerror(errno));
exit(0);
}

19
crypto/openssh/ssh-add.1
View File

@ -1,4 +1,4 @@
.\" $OpenBSD: ssh-add.1,v 1.30 2002/02/04 20:41:16 stevesk Exp $
.\" $OpenBSD: ssh-add.1,v 1.35 2002/06/19 00:27:55 deraadt Exp $
.\"
.\" -*- nroff -*-
.\"
@ -45,7 +45,8 @@
.Nd adds RSA or DSA identities to the authentication agent
.Sh SYNOPSIS
.Nm ssh-add
.Op Fl lLdD
.Op Fl lLdDxX
.Op Fl t Ar life
.Op Ar
.Nm ssh-add
.Fl s Ar reader
@ -57,7 +58,7 @@ adds RSA or DSA identities to the authentication agent,
.Xr ssh-agent 1 .
When run without arguments, it adds the files
.Pa $HOME/.ssh/id_rsa ,
.Pa $HOME/.ssh/id_dsa
.Pa $HOME/.ssh/id_dsa
and
.Pa $HOME/.ssh/identity .
Alternative file names can be given on the command line.
@ -83,6 +84,15 @@ Lists public key parameters of all identities currently represented by the agent
Instead of adding the identity, removes the identity from the agent.
.It Fl D
Deletes all identities from the agent.
.It Fl x
Lock the agent with a password.
.It Fl X
Unlock the agent.
.It Fl t Ar life
Set a maximum lifetime when adding identities to an agent.
The lifetime may be specified in seconds or in a time format
specified in
.Xr sshd 8 .
.It Fl s Ar reader
Add key in smartcard
.Ar reader .
@ -129,6 +139,9 @@ or related script.
may be necessary to redirect the input from
.Pa /dev/null
to make this work.)
.It Ev SSH_AUTH_SOCK
Identifies the path of a unix-domain socket used to communicate with the
agent.
.El
.Sh DIAGNOSTICS
Exit status is 0 on success, 1 if the specified command fails,

11
crypto/openssh/ssh-agent.1
View File

@ -1,4 +1,4 @@
.\" $OpenBSD: ssh-agent.1,v 1.31 2002/02/04 20:41:16 stevesk Exp $
.\" $OpenBSD: ssh-agent.1,v 1.33 2002/06/19 00:27:55 deraadt Exp $
.\"
.\" Author: Tatu Ylonen <ylo@cs.hut.fi>
.\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -42,6 +42,7 @@
.Nd authentication agent
.Sh SYNOPSIS
.Nm ssh-agent
.Op Fl a Ar bind_address
.Op Fl c Li | Fl s
.Op Fl d
.Op Ar command Op Ar args ...
@ -64,6 +65,11 @@ machines using
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl a Ar bind_address
Bind the agent to the unix-domain socket
.Ar bind_address .
The default is
.Pa /tmp/ssh-XXXXXXXX/agent.<pid> .
.It Fl c
Generate C-shell commands on
.Dv stdout .
@ -96,7 +102,7 @@ When executed without arguments,
.Xr ssh-add 1
adds the files
.Pa $HOME/.ssh/id_rsa ,
.Pa $HOME/.ssh/id_dsa
.Pa $HOME/.ssh/id_dsa
and
.Pa $HOME/.ssh/identity .
If the identity has a passphrase,
@ -135,7 +141,6 @@ by the agent, and the result will be returned to the requester.
This way, private keys are not exposed to clients using the agent.
.Pp
A unix-domain socket is created
.Pq Pa /tmp/ssh-XXXXXXXX/agent.<pid> ,
and the name of this socket is stored in the
.Ev SSH_AUTH_SOCK
environment

4
crypto/openssh/ssh-keygen.1
View File

@ -1,4 +1,4 @@
.\" $OpenBSD: ssh-keygen.1,v 1.53 2002/02/16 14:53:37 stevesk Exp $
.\" $OpenBSD: ssh-keygen.1,v 1.54 2002/06/19 00:27:55 deraadt Exp $
.\"
.\" -*- nroff -*-
.\"
@ -86,7 +86,7 @@
generates, manages and converts authentication keys for
.Xr ssh 1 .
.Nm
can create RSA keys for use by SSH protocol version 1 and RSA or DSA
can create RSA keys for use by SSH protocol version 1 and RSA or DSA
keys for use by SSH protocol version 2. The type of key to be generated
is specified with the
.Fl t

147
crypto/openssh/ssh-keygen.c
View File

@ -12,7 +12,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: ssh-keygen.c,v 1.94 2002/02/25 16:33:27 markus Exp $");
RCSID("$OpenBSD: ssh-keygen.c,v 1.100 2002/06/19 00:27:55 deraadt Exp $");
#include <openssl/evp.h>
#include <openssl/pem.h>
@ -29,8 +29,6 @@ RCSID("$OpenBSD: ssh-keygen.c,v 1.94 2002/02/25 16:33:27 markus Exp $");
#include "readpass.h"
#ifdef SMARTCARD
#include <sectok.h>
#include <openssl/engine.h>
#include "scard.h"
#endif
@ -138,7 +136,7 @@ load_identity(char *filename)
}
#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
@ -288,6 +286,7 @@ do_convert_from_ssh2(struct passwd *pw)
{
Key *k;
int blen;
u_int len;
char line[1024], *p;
u_char blob[8096];
char encoded[8096];
@ -332,6 +331,12 @@ do_convert_from_ssh2(struct passwd *pw)
*p = '\0';
strlcat(encoded, line, sizeof(encoded));
}
len = strlen(encoded);
if (((len % 4) == 3) &&
(encoded[len-1] == '=') &&
(encoded[len-2] == '=') &&
(encoded[len-3] == '='))
encoded[len-3] = '\0';
blen = uudecode(encoded, blob, sizeof(blob));
if (blen < 0) {
fprintf(stderr, "uudecode failed.\n");
@ -385,145 +390,47 @@ do_print_public(struct passwd *pw)
}
#ifdef SMARTCARD
#define NUM_RSA_KEY_ELEMENTS 5+1
#define COPY_RSA_KEY(x, i) \
do { \
len = BN_num_bytes(prv->rsa->x); \
elements[i] = xmalloc(len); \
debug("#bytes %d", len); \
if (BN_bn2bin(prv->rsa->x, elements[i]) < 0) \
goto done; \
} while (0)
static int
get_AUT0(char *aut0)
{
EVP_MD *evp_md = EVP_sha1();
EVP_MD_CTX md;
char *pass;
pass = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN);
if (pass == NULL)
return -1;
EVP_DigestInit(&md, evp_md);
EVP_DigestUpdate(&md, pass, strlen(pass));
EVP_DigestFinal(&md, aut0, NULL);
memset(pass, 0, strlen(pass));
xfree(pass);
return 0;
}
static void
do_upload(struct passwd *pw, const char *sc_reader_id)
{
Key *prv = NULL;
struct stat st;
u_char *elements[NUM_RSA_KEY_ELEMENTS];
u_char key_fid[2];
u_char DEFAUT0[] = {0xad, 0x9f, 0x61, 0xfe, 0xfa, 0x20, 0xce, 0x63};
u_char AUT0[EVP_MAX_MD_SIZE];
int len, status = 1, i, fd = -1, ret;
int sw = 0, cla = 0x00;
int ret;
for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
elements[i] = NULL;
if (!have_identity)
ask_filename(pw, "Enter file in which the key is");
if (stat(identity_file, &st) < 0) {
perror(identity_file);
goto done;
exit(1);
}
prv = load_identity(identity_file);
if (prv == NULL) {
error("load failed");
goto done;
exit(1);
}
COPY_RSA_KEY(q, 0);
COPY_RSA_KEY(p, 1);
COPY_RSA_KEY(iqmp, 2);
COPY_RSA_KEY(dmq1, 3);
COPY_RSA_KEY(dmp1, 4);
COPY_RSA_KEY(n, 5);
len = BN_num_bytes(prv->rsa->n);
fd = sectok_friendly_open(sc_reader_id, STONOWAIT, &sw);
if (fd < 0) {
error("sectok_open failed: %s", sectok_get_sw(sw));
goto done;
}
if (! sectok_cardpresent(fd)) {
error("smartcard in reader %s not present",
sc_reader_id);
goto done;
}
ret = sectok_reset(fd, 0, NULL, &sw);
if (ret <= 0) {
error("sectok_reset failed: %s", sectok_get_sw(sw));
goto done;
}
if ((cla = cyberflex_inq_class(fd)) < 0) {
error("cyberflex_inq_class failed");
goto done;
}
memcpy(AUT0, DEFAUT0, sizeof(DEFAUT0));
if (cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
if (get_AUT0(AUT0) < 0 ||
cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
error("cyberflex_verify_AUT0 failed");
goto done;
}
}
key_fid[0] = 0x00;
key_fid[1] = 0x12;
if (cyberflex_load_rsa_priv(fd, cla, key_fid, 5, 8*len, elements,
&sw) < 0) {
error("cyberflex_load_rsa_priv failed: %s", sectok_get_sw(sw));
goto done;
}
if (!sectok_swOK(sw))
goto done;
log("cyberflex_load_rsa_priv done");
key_fid[0] = 0x73;
key_fid[1] = 0x68;
if (cyberflex_load_rsa_pub(fd, cla, key_fid, len, elements[5],
&sw) < 0) {
error("cyberflex_load_rsa_pub failed: %s", sectok_get_sw(sw));
goto done;
}
if (!sectok_swOK(sw))
goto done;
log("cyberflex_load_rsa_pub done");
status = 0;
ret = sc_put_key(prv, sc_reader_id);
key_free(prv);
if (ret < 0)
exit(1);
log("loading key done");
done:
memset(elements[0], '\0', BN_num_bytes(prv->rsa->q));
memset(elements[1], '\0', BN_num_bytes(prv->rsa->p));
memset(elements[2], '\0', BN_num_bytes(prv->rsa->iqmp));
memset(elements[3], '\0', BN_num_bytes(prv->rsa->dmq1));
memset(elements[4], '\0', BN_num_bytes(prv->rsa->dmp1));
memset(elements[5], '\0', BN_num_bytes(prv->rsa->n));
if (prv)
key_free(prv);
for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
if (elements[i])
xfree(elements[i]);
if (fd != -1)
sectok_close(fd);
exit(status);
exit(0);
}
static void
do_download(struct passwd *pw, const char *sc_reader_id)
{
Key *pub = NULL;
Key **keys = NULL;
int i;
pub = sc_get_key(sc_reader_id);
if (pub == NULL)
keys = sc_get_keys(sc_reader_id, NULL);
if (keys == NULL)
fatal("cannot read public key from smartcard");
key_write(pub, stdout);
key_free(pub);
fprintf(stdout, "\n");
for (i = 0; keys[i]; i++) {
key_write(keys[i], stdout);
key_free(keys[i]);
fprintf(stdout, "\n");
}
xfree(keys);
exit(0);
}
#endif /* SMARTCARD */

8
crypto/openssh/ssh-keyscan.c
View File

@ -7,7 +7,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: ssh-keyscan.c,v 1.35 2002/03/04 18:30:23 stevesk Exp $");
RCSID("$OpenBSD: ssh-keyscan.c,v 1.36 2002/06/16 21:30:58 itojun Exp $");
#include <sys/queue.h>
#include <errno.h>
@ -581,7 +581,7 @@ conloop(void)
con *c;
gettimeofday(&now, NULL);
c = tq.tqh_first;
c = TAILQ_FIRST(&tq);
if (c && (c->c_tv.tv_sec > now.tv_sec ||
(c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec > now.tv_usec))) {
@ -614,12 +614,12 @@ conloop(void)
xfree(r);
xfree(e);
c = tq.tqh_first;
c = TAILQ_FIRST(&tq);
while (c && (c->c_tv.tv_sec < now.tv_sec ||
(c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec < now.tv_usec))) {
int s = c->c_fd;
c = c->c_link.tqe_next;
c = TAILQ_NEXT(c, c_link);
conrecycle(s);
}
}

67
crypto/openssh/ssh-keysign.8 Normal file
View File

@ -0,0 +1,67 @@
.\" $OpenBSD: ssh-keysign.8,v 1.2 2002/06/10 16:56:30 stevesk Exp $
.\"
.\" Copyright (c) 2002 Markus Friedl. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd May 24, 2002
.Dt SSH-KEYSIGN 8
.Os
.Sh NAME
.Nm ssh-keysign
.Nd ssh helper program for hostbased authentication
.Sh SYNOPSIS
.Nm
.Sh DESCRIPTION
.Nm
is used by
.Xr ssh 1
to access the local host keys and generate the digital signature
required during hostbased authentication with SSH protocol version 2.
.Nm
is not intended to be invoked by the user, but from
.Xr ssh 1 .
See
.Xr ssh 1
and
.Xr sshd 8
for more information about hostbased authentication.
.Sh FILES
.Bl -tag -width Ds
.It Pa /etc/ssh/ssh_host_dsa_key, /etc/ssh/ssh_host_rsa_key
These files contain the private parts of the host keys used to
generate the digital signature. They
should be owned by root, readable only by root, and not
accessible to others.
Since they are readable only by root,
.Nm
must be set-uid root if hostbased authentication is used.
.El
.Sh SEE ALSO
.Xr ssh 1 ,
.Xr ssh-keygen 1 ,
.Xr sshd 8
.Sh AUTHORS
Markus Friedl <markus@openbsd.org>
.Sh HISTORY
.Nm
first appeared in
.Ox 3.2 .

208
crypto/openssh/ssh-keysign.c Normal file
View File

@ -0,0 +1,208 @@
/*
* Copyright (c) 2002 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: ssh-keysign.c,v 1.4 2002/06/19 00:27:55 deraadt Exp $");
#include <openssl/evp.h>
#include "log.h"
#include "key.h"
#include "ssh2.h"
#include "misc.h"
#include "xmalloc.h"
#include "buffer.h"
#include "bufaux.h"
#include "authfile.h"
#include "msg.h"
#include "canohost.h"
#include "pathnames.h"
static int
valid_request(struct passwd *pw, char *host, Key **ret, u_char *data,
u_int datalen)
{
Buffer b;
Key *key;
u_char *pkblob;
u_int blen, len;
char *pkalg, *p;
int pktype, fail;
fail = 0;
buffer_init(&b);
buffer_append(&b, data, datalen);
/* session id, currently limited to SHA1 (20 bytes) */
p = buffer_get_string(&b, &len);
if (len != 20)
fail++;
xfree(p);
if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST)
fail++;
/* server user */
buffer_skip_string(&b);
/* service */
p = buffer_get_string(&b, NULL);
if (strcmp("ssh-connection", p) != 0)
fail++;
xfree(p);
/* method */
p = buffer_get_string(&b, NULL);
if (strcmp("hostbased", p) != 0)
fail++;
xfree(p);
/* pubkey */
pkalg = buffer_get_string(&b, NULL);
pkblob = buffer_get_string(&b, &blen);
pktype = key_type_from_name(pkalg);
if (pktype == KEY_UNSPEC)
fail++;
else if ((key = key_from_blob(pkblob, blen)) == NULL)
fail++;
else if (key->type != pktype)
fail++;
xfree(pkalg);
xfree(pkblob);
/* client host name, handle trailing dot */
p = buffer_get_string(&b, &len);
debug2("valid_request: check expect chost %s got %s", host, p);
if (strlen(host) != len - 1)
fail++;
else if (p[len - 1] != '.')
fail++;
else if (strncasecmp(host, p, len - 1) != 0)
fail++;
xfree(p);
/* local user */
p = buffer_get_string(&b, NULL);
if (strcmp(pw->pw_name, p) != 0)
fail++;
xfree(p);
/* end of message */
if (buffer_len(&b) != 0)
fail++;
debug3("valid_request: fail %d", fail);
if (fail && key != NULL)
key_free(key);
else
*ret = key;
return (fail ? -1 : 0);
}
int
main(int argc, char **argv)
{
Buffer b;
Key *keys[2], *key;
struct passwd *pw;
int key_fd[2], i, found, version = 2, fd;
u_char *signature, *data;
char *host;
u_int slen, dlen;
key_fd[0] = open(_PATH_HOST_RSA_KEY_FILE, O_RDONLY);
key_fd[1] = open(_PATH_HOST_DSA_KEY_FILE, O_RDONLY);
seteuid(getuid());
setuid(getuid());
#ifdef DEBUG_SSH_KEYSIGN
log_init("ssh-keysign", SYSLOG_LEVEL_DEBUG3, SYSLOG_FACILITY_AUTH, 0);
#endif
if (key_fd[0] == -1 && key_fd[1] == -1)
fatal("could not open any host key");
if ((pw = getpwuid(getuid())) == NULL)
fatal("getpwuid failed");
pw = pwcopy(pw);
SSLeay_add_all_algorithms();
found = 0;
for (i = 0; i < 2; i++) {
keys[i] = NULL;
if (key_fd[i] == -1)
continue;
keys[i] = key_load_private_pem(key_fd[i], KEY_UNSPEC,
NULL, NULL);
close(key_fd[i]);
if (keys[i] != NULL)
found = 1;
}
if (!found)
fatal("no hostkey found");
buffer_init(&b);
if (msg_recv(STDIN_FILENO, &b) < 0)
fatal("msg_recv failed");
if (buffer_get_char(&b) != version)
fatal("bad version");
fd = buffer_get_int(&b);
if ((fd == STDIN_FILENO) || (fd == STDOUT_FILENO))
fatal("bad fd");
if ((host = get_local_name(fd)) == NULL)
fatal("cannot get sockname for fd");
data = buffer_get_string(&b, &dlen);
if (valid_request(pw, host, &key, data, dlen) < 0)
fatal("not a valid request");
xfree(data);
xfree(host);
found = 0;
for (i = 0; i < 2; i++) {
if (keys[i] != NULL &&
key_equal(key, keys[i])) {
found = 1;
break;
}
}
if (!found)
fatal("no matching hostkey found");
if (key_sign(keys[i], &signature, &slen, data, dlen) != 0)
fatal("key_sign failed");
/* send reply */
buffer_clear(&b);
buffer_put_string(&b, signature, slen);
msg_send(STDOUT_FILENO, version, &b);
return (0);
}

18
crypto/openssh/ssh-keysign/Makefile Normal file
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@ -0,0 +1,18 @@
# $OpenBSD: Makefile,v 1.3 2002/05/31 10:30:33 markus Exp $
.PATH: ${.CURDIR}/..
PROG= ssh-keysign
BINOWN= root
BINMODE?=4555
BINDIR= /usr/libexec
MAN= ssh-keysign.8
SRCS= ssh-keysign.c
.include <bsd.prog.mk>
LDADD+= -lcrypto -lz
DPADD+= ${LIBCRYPTO} ${LIBZ}

34
crypto/openssh/ssh-rsa.c
View File

@ -23,7 +23,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: ssh-rsa.c,v 1.16 2002/02/24 19:14:59 markus Exp $");
RCSID("$OpenBSD: ssh-rsa.c,v 1.20 2002/06/10 16:53:06 stevesk Exp $");
#include <openssl/evp.h>
#include <openssl/err.h>
@ -35,6 +35,7 @@ RCSID("$OpenBSD: ssh-rsa.c,v 1.16 2002/02/24 19:14:59 markus Exp $");
#include "key.h"
#include "ssh-rsa.h"
#include "compat.h"
#include "ssh.h"
/* RSASSA-PKCS1-v1_5 (PKCS #1 v2.0 signature) with SHA1 */
int
@ -54,10 +55,6 @@ ssh_rsa_sign(
error("ssh_rsa_sign: no RSA key");
return -1;
}
if (datafellows & SSH_BUG_SIGBLOB) {
error("ssh_rsa_sign: SSH_BUG_SIGBLOB not supported");
return -1;
}
nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1;
if ((evp_md = EVP_get_digestbynid(nid)) == NULL) {
error("ssh_rsa_sign: EVP_get_digestbynid %d failed", nid);
@ -118,20 +115,16 @@ ssh_rsa_verify(
EVP_MD_CTX md;
char *ktype;
u_char digest[EVP_MAX_MD_SIZE], *sigblob;
u_int len, dlen;
u_int len, dlen, modlen;
int rlen, ret, nid;
if (key == NULL || key->type != KEY_RSA || key->rsa == NULL) {
error("ssh_rsa_verify: no RSA key");
return -1;
}
if (datafellows & SSH_BUG_SIGBLOB) {
error("ssh_rsa_verify: SSH_BUG_SIGBLOB not supported");
return -1;
}
if (BN_num_bits(key->rsa->n) < 768) {
error("ssh_rsa_verify: n too small: %d bits",
BN_num_bits(key->rsa->n));
if (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) {
error("ssh_rsa_verify: RSA modulus too small: %d < minimum %d bits",
BN_num_bits(key->rsa->n), SSH_RSA_MINIMUM_MODULUS_SIZE);
return -1;
}
buffer_init(&b);
@ -152,6 +145,21 @@ ssh_rsa_verify(
xfree(sigblob);
return -1;
}
/* RSA_verify expects a signature of RSA_size */
modlen = RSA_size(key->rsa);
if (len > modlen) {
error("ssh_rsa_verify: len %d > modlen %d", len, modlen);
xfree(sigblob);
return -1;
} else if (len < modlen) {
int diff = modlen - len;
debug("ssh_rsa_verify: add padding: modlen %d > len %d",
modlen, len);
sigblob = xrealloc(sigblob, modlen);
memmove(sigblob + diff, sigblob, len);
memset(sigblob, 0, diff);
len = modlen;
}
nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1;
if ((evp_md = EVP_get_digestbynid(nid)) == NULL) {
error("ssh_rsa_verify: EVP_get_digestbynid %d failed", nid);

12
crypto/openssh/ssh/Makefile
View File

@ -1,14 +1,14 @@
# $OpenBSD: Makefile,v 1.37 2002/03/05 00:49:51 deraadt Exp $
# $OpenBSD: Makefile,v 1.42 2002/06/20 19:56:07 stevesk Exp $
.PATH: ${.CURDIR}/..
PROG= ssh
BINOWN= root
BINMODE?=4555
#BINMODE?=4555
BINDIR= /usr/bin
MAN= ssh.1
MAN= ssh.1 ssh_config.5
LINKS= ${BINDIR}/ssh ${BINDIR}/slogin
MLINKS= ssh.1 slogin.1
@ -20,7 +20,7 @@ SRCS= ssh.c readconf.c clientloop.c sshtty.c \
.if (${KERBEROS5:L} == "yes")
CFLAGS+= -DKRB5 -I${DESTDIR}/usr/include/kerberosV
LDADD+= -lkrb5 -lasn1 -lcom_err
DPADD+= ${LIBKRB5} ${LIBASN1}
DPADD+= ${LIBKRB5} ${LIBASN1} ${LIBCOM_ERR}
.endif # KERBEROS5
.if (${KERBEROS:L} == "yes")
@ -30,11 +30,11 @@ DPADD+= ${LIBKRB}
.if (${AFS:L} == "yes")
CFLAGS+= -DAFS
LDADD+= -lkafs
DPADD+= ${LIBKRBAFS}
DPADD+= ${LIBKAFS}
.endif # AFS
.endif # KERBEROS
.include <bsd.prog.mk>
LDADD+= -lcrypto -lz -ldes
DPADD+= ${LIBCRYPTO} ${LIBZ}
DPADD+= ${LIBCRYPTO} ${LIBZ} ${LIBDES}

621
crypto/openssh/ssh_config.5 Normal file
View File

@ -0,0 +1,621 @@
.\" -*- nroff -*-
.\"
.\" Author: Tatu Ylonen <ylo@cs.hut.fi>
.\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
.\" All rights reserved
.\"
.\" As far as I am concerned, the code I have written for this software
.\" can be used freely for any purpose. Any derived versions of this
.\" software must be clearly marked as such, and if the derived work is
.\" incompatible with the protocol description in the RFC file, it must be
.\" called by a name other than "ssh" or "Secure Shell".
.\"
.\" Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
.\" Copyright (c) 1999 Aaron Campbell. All rights reserved.
.\" Copyright (c) 1999 Theo de Raadt. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $OpenBSD: ssh_config.5,v 1.1 2002/06/20 19:56:07 stevesk Exp $
.Dd September 25, 1999
.Dt SSH_CONFIG 5
.Os
.Sh NAME
.Nm ssh_config
.Nd OpenSSH SSH client configuration files
.Sh SYNOPSIS
.Bl -tag -width Ds -compact
.It Pa $HOME/.ssh/config
.It Pa /etc/ssh/ssh_config
.El
.Sh DESCRIPTION
.Nm ssh
obtains configuration data from the following sources in
the following order:
command line options, user's configuration file
.Pq Pa $HOME/.ssh/config ,
and system-wide configuration file
.Pq Pa /etc/ssh/ssh_config .
.Pp
For each parameter, the first obtained value
will be used.
The configuration files contain sections bracketed by
.Dq Host
specifications, and that section is only applied for hosts that
match one of the patterns given in the specification.
The matched host name is the one given on the command line.
.Pp
Since the first obtained value for each parameter is used, more
host-specific declarations should be given near the beginning of the
file, and general defaults at the end.
.Pp
The configuration file has the following format:
.Pp
Empty lines and lines starting with
.Ql #
are comments.
.Pp
Otherwise a line is of the format
.Dq keyword arguments .
Configuration options may be separated by whitespace or
optional whitespace and exactly one
.Ql = ;
the latter format is useful to avoid the need to quote whitespace
when specifying configuration options using the
.Nm ssh ,
.Nm scp
and
.Nm sftp
.Fl o
option.
.Pp
The possible
keywords and their meanings are as follows (note that
keywords are case-insensitive and arguments are case-sensitive):
.Bl -tag -width Ds
.It Cm Host
Restricts the following declarations (up to the next
.Cm Host
keyword) to be only for those hosts that match one of the patterns
given after the keyword.
.Ql \&*
and
.Ql ?
can be used as wildcards in the
patterns.
A single
.Ql \&*
as a pattern can be used to provide global
defaults for all hosts.
The host is the
.Ar hostname
argument given on the command line (i.e., the name is not converted to
a canonicalized host name before matching).
.It Cm AFSTokenPassing
Specifies whether to pass AFS tokens to remote host.
The argument to this keyword must be
.Dq yes
or
.Dq no .
This option applies to protocol version 1 only.
.It Cm BatchMode
If set to
.Dq yes ,
passphrase/password querying will be disabled.
This option is useful in scripts and other batch jobs where no user
is present to supply the password.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
.It Cm BindAddress
Specify the interface to transmit from on machines with multiple
interfaces or aliased addresses.
Note that this option does not work if
.Cm UsePrivilegedPort
is set to
.Dq yes .
.It Cm ChallengeResponseAuthentication
Specifies whether to use challenge response authentication.
The argument to this keyword must be
.Dq yes
or
.Dq no .
The default is
.Dq yes .
.It Cm CheckHostIP
If this flag is set to
.Dq yes ,
ssh will additionally check the host IP address in the
.Pa known_hosts
file.
This allows ssh to detect if a host key changed due to DNS spoofing.
If the option is set to
.Dq no ,
the check will not be executed.
The default is
.Dq yes .
.It Cm Cipher
Specifies the cipher to use for encrypting the session
in protocol version 1.
Currently,
.Dq blowfish ,
.Dq 3des ,
and
.Dq des
are supported.
.Ar des
is only supported in the
.Nm ssh
client for interoperability with legacy protocol 1 implementations
that do not support the
.Ar 3des
cipher. Its use is strongly discouraged due to cryptographic
weaknesses.
The default is
.Dq 3des .
.It Cm Ciphers
Specifies the ciphers allowed for protocol version 2
in order of preference.
Multiple ciphers must be comma-separated.
The default is
.Pp
.Bd -literal
``aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,
aes192-cbc,aes256-cbc''
.Ed
.It Cm ClearAllForwardings
Specifies that all local, remote and dynamic port forwardings
specified in the configuration files or on the command line be
cleared. This option is primarily useful when used from the
.Nm ssh
command line to clear port forwardings set in
configuration files, and is automatically set by
.Xr scp 1
and
.Xr sftp 1 .
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
.It Cm Compression
Specifies whether to use compression.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
.It Cm CompressionLevel
Specifies the compression level to use if compression is enabled.
The argument must be an integer from 1 (fast) to 9 (slow, best).
The default level is 6, which is good for most applications.
The meaning of the values is the same as in
.Xr gzip 1 .
Note that this option applies to protocol version 1 only.
.It Cm ConnectionAttempts
Specifies the number of tries (one per second) to make before exiting.
The argument must be an integer.
This may be useful in scripts if the connection sometimes fails.
The default is 1.
.It Cm DynamicForward
Specifies that a TCP/IP port on the local machine be forwarded
over the secure channel, and the application
protocol is then used to determine where to connect to from the
remote machine. The argument must be a port number.
Currently the SOCKS4 protocol is supported, and
.Nm ssh
will act as a SOCKS4 server.
Multiple forwardings may be specified, and
additional forwardings can be given on the command line. Only
the superuser can forward privileged ports.
.It Cm EscapeChar
Sets the escape character (default:
.Ql ~ ) .
The escape character can also
be set on the command line.
The argument should be a single character,
.Ql ^
followed by a letter, or
.Dq none
to disable the escape
character entirely (making the connection transparent for binary
data).
.It Cm ForwardAgent
Specifies whether the connection to the authentication agent (if any)
will be forwarded to the remote machine.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
.It Cm ForwardX11
Specifies whether X11 connections will be automatically redirected
over the secure channel and
.Ev DISPLAY
set.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
.It Cm GatewayPorts
Specifies whether remote hosts are allowed to connect to local
forwarded ports.
By default,
.Nm ssh
binds local port forwardings to the loopback address. This
prevents other remote hosts from connecting to forwarded ports.
.Cm GatewayPorts
can be used to specify that
.Nm ssh
should bind local port forwardings to the wildcard address,
thus allowing remote hosts to connect to forwarded ports.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
.It Cm GlobalKnownHostsFile
Specifies a file to use for the global
host key database instead of
.Pa /etc/ssh/ssh_known_hosts .
.It Cm HostbasedAuthentication
Specifies whether to try rhosts based authentication with public key
authentication.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
This option applies to protocol version 2 only and
is similar to
.Cm RhostsRSAAuthentication .
.It Cm HostKeyAlgorithms
Specifies the protocol version 2 host key algorithms
that the client wants to use in order of preference.
The default for this option is:
.Dq ssh-rsa,ssh-dss .
.It Cm HostKeyAlias
Specifies an alias that should be used instead of the
real host name when looking up or saving the host key
in the host key database files.
This option is useful for tunneling ssh connections
or for multiple servers running on a single host.
.It Cm HostName
Specifies the real host name to log into.
This can be used to specify nicknames or abbreviations for hosts.
Default is the name given on the command line.
Numeric IP addresses are also permitted (both on the command line and in
.Cm HostName
specifications).
.It Cm IdentityFile
Specifies a file from which the user's RSA or DSA authentication identity
is read. The default is
.Pa $HOME/.ssh/identity
for protocol version 1, and
.Pa $HOME/.ssh/id_rsa
and
.Pa $HOME/.ssh/id_dsa
for protocol version 2.
Additionally, any identities represented by the authentication agent
will be used for authentication.
The file name may use the tilde
syntax to refer to a user's home directory.
It is possible to have
multiple identity files specified in configuration files; all these
identities will be tried in sequence.
.It Cm KeepAlive
Specifies whether the system should send TCP keepalive messages to the
other side.
If they are sent, death of the connection or crash of one
of the machines will be properly noticed.
However, this means that
connections will die if the route is down temporarily, and some people
find it annoying.
.Pp
The default is
.Dq yes
(to send keepalives), and the client will notice
if the network goes down or the remote host dies.
This is important in scripts, and many users want it too.
.Pp
To disable keepalives, the value should be set to
.Dq no .
.It Cm KerberosAuthentication
Specifies whether Kerberos authentication will be used.
The argument to this keyword must be
.Dq yes
or
.Dq no .
.It Cm KerberosTgtPassing
Specifies whether a Kerberos TGT will be forwarded to the server.
This will only work if the Kerberos server is actually an AFS kaserver.
The argument to this keyword must be
.Dq yes
or
.Dq no .
.It Cm LocalForward
Specifies that a TCP/IP port on the local machine be forwarded over
the secure channel to the specified host and port from the remote machine.
The first argument must be a port number, and the second must be
.Ar host:port .
IPv6 addresses can be specified with an alternative syntax:
.Ar host/port .
Multiple forwardings may be specified, and additional
forwardings can be given on the command line.
Only the superuser can forward privileged ports.
.It Cm LogLevel
Gives the verbosity level that is used when logging messages from
.Nm ssh .
The possible values are:
QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2 and DEBUG3.
The default is INFO. DEBUG and DEBUG1 are equivalent. DEBUG2
and DEBUG3 each specify higher levels of verbose output.
.It Cm MACs
Specifies the MAC (message authentication code) algorithms
in order of preference.
The MAC algorithm is used in protocol version 2
for data integrity protection.
Multiple algorithms must be comma-separated.
The default is
.Dq hmac-md5,hmac-sha1,hmac-ripemd160,hmac-sha1-96,hmac-md5-96 .
.It Cm NoHostAuthenticationForLocalhost
This option can be used if the home directory is shared across machines.
In this case localhost will refer to a different machine on each of
the machines and the user will get many warnings about changed host keys.
However, this option disables host authentication for localhost.
The argument to this keyword must be
.Dq yes
or
.Dq no .
The default is to check the host key for localhost.
.It Cm NumberOfPasswordPrompts
Specifies the number of password prompts before giving up.
The argument to this keyword must be an integer.
Default is 3.
.It Cm PasswordAuthentication
Specifies whether to use password authentication.
The argument to this keyword must be
.Dq yes
or
.Dq no .
The default is
.Dq yes .
.It Cm Port
Specifies the port number to connect on the remote host.
Default is 22.
.It Cm PreferredAuthentications
Specifies the order in which the client should try protocol 2
authentication methods. This allows a client to prefer one method (e.g.
.Cm keyboard-interactive )
over another method (e.g.
.Cm password )
The default for this option is:
.Dq hostbased,publickey,keyboard-interactive,password .
.It Cm Protocol
Specifies the protocol versions
.Nm ssh
should support in order of preference.
The possible values are
.Dq 1
and
.Dq 2 .
Multiple versions must be comma-separated.
The default is
.Dq 2,1 .
This means that
.Nm ssh
tries version 2 and falls back to version 1
if version 2 is not available.
.It Cm ProxyCommand
Specifies the command to use to connect to the server.
The command
string extends to the end of the line, and is executed with
.Pa /bin/sh .
In the command string,
.Ql %h
will be substituted by the host name to
connect and
.Ql %p
by the port.
The command can be basically anything,
and should read from its standard input and write to its standard output.
It should eventually connect an
.Xr sshd 8
server running on some machine, or execute
.Ic sshd -i
somewhere.
Host key management will be done using the
HostName of the host being connected (defaulting to the name typed by
the user).
Note that
.Cm CheckHostIP
is not available for connects with a proxy command.
.Pp
.It Cm PubkeyAuthentication
Specifies whether to try public key authentication.
The argument to this keyword must be
.Dq yes
or
.Dq no .
The default is
.Dq yes .
This option applies to protocol version 2 only.
.It Cm RemoteForward
Specifies that a TCP/IP port on the remote machine be forwarded over
the secure channel to the specified host and port from the local machine.
The first argument must be a port number, and the second must be
.Ar host:port .
IPv6 addresses can be specified with an alternative syntax:
.Ar host/port .
Multiple forwardings may be specified, and additional
forwardings can be given on the command line.
Only the superuser can forward privileged ports.
.It Cm RhostsAuthentication
Specifies whether to try rhosts based authentication.
Note that this
declaration only affects the client side and has no effect whatsoever
on security.
Most servers do not permit RhostsAuthentication because it
is not secure (see
.Cm RhostsRSAAuthentication ) .
The argument to this keyword must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
This option applies to protocol version 1 only.
.It Cm RhostsRSAAuthentication
Specifies whether to try rhosts based authentication with RSA host
authentication.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
This option applies to protocol version 1 only and requires
.Nm ssh
to be setuid root.
.It Cm RSAAuthentication
Specifies whether to try RSA authentication.
The argument to this keyword must be
.Dq yes
or
.Dq no .
RSA authentication will only be
attempted if the identity file exists, or an authentication agent is
running.
The default is
.Dq yes .
Note that this option applies to protocol version 1 only.
.It Cm SmartcardDevice
Specifies which smartcard device to use. The argument to this keyword is
the device
.Nm ssh
should use to communicate with a smartcard used for storing the user's
private RSA key. By default, no device is specified and smartcard support
is not activated.
.It Cm StrictHostKeyChecking
If this flag is set to
.Dq yes ,
.Nm ssh
will never automatically add host keys to the
.Pa $HOME/.ssh/known_hosts
file, and refuses to connect to hosts whose host key has changed.
This provides maximum protection against trojan horse attacks,
however, can be annoying when the
.Pa /etc/ssh/ssh_known_hosts
file is poorly maintained, or connections to new hosts are
frequently made.
This option forces the user to manually
add all new hosts.
If this flag is set to
.Dq no ,
.Nm ssh
will automatically add new host keys to the
user known hosts files.
If this flag is set to
.Dq ask ,
new host keys
will be added to the user known host files only after the user
has confirmed that is what they really want to do, and
.Nm ssh
will refuse to connect to hosts whose host key has changed.
The host keys of
known hosts will be verified automatically in all cases.
The argument must be
.Dq yes ,
.Dq no
or
.Dq ask .
The default is
.Dq ask .
.It Cm UsePrivilegedPort
Specifies whether to use a privileged port for outgoing connections.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
Note that this option must be set to
.Dq yes
if
.Cm RhostsAuthentication
and
.Cm RhostsRSAAuthentication
authentications are needed with older servers.
.It Cm User
Specifies the user to log in as.
This can be useful when a different user name is used on different machines.
This saves the trouble of
having to remember to give the user name on the command line.
.It Cm UserKnownHostsFile
Specifies a file to use for the user
host key database instead of
.Pa $HOME/.ssh/known_hosts .
.It Cm XAuthLocation
Specifies the location of the
.Xr xauth 1
program.
The default is
.Pa /usr/X11R6/bin/xauth .
.El
.Sh FILES
.Bl -tag -width Ds
.It Pa $HOME/.ssh/config
This is the per-user configuration file.
The format of this file is described above.
This file is used by the
.Nm ssh
client.
This file does not usually contain any sensitive information,
but the recommended permissions are read/write for the user, and not
accessible by others.
.It Pa /etc/ssh/ssh_config
Systemwide configuration file.
This file provides defaults for those
values that are not specified in the user's configuration file, and
for those users who do not have a configuration file.
This file must be world-readable.
.El
.Sh AUTHORS
OpenSSH is a derivative of the original and free
ssh 1.2.12 release by Tatu Ylonen.
Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
Theo de Raadt and Dug Song
removed many bugs, re-added newer features and
created OpenSSH.
Markus Friedl contributed the support for SSH
protocol versions 1.5 and 2.0.
.Sh SEE ALSO
.Xr ssh 1

16
crypto/openssh/sshd/Makefile
View File

@ -1,4 +1,4 @@
# $OpenBSD: Makefile,v 1.46 2002/03/05 00:49:51 deraadt Exp $
# $OpenBSD: Makefile,v 1.51 2002/06/20 19:56:07 stevesk Exp $
.PATH: ${.CURDIR}/..
@ -6,14 +6,16 @@ PROG= sshd
BINOWN= root
BINMODE=555
BINDIR= /usr/sbin
MAN= sshd.8
MAN= sshd.8 sshd_config.5
CFLAGS+=-DHAVE_LOGIN_CAP -DBSD_AUTH
SRCS= sshd.c auth-rhosts.c auth-passwd.c auth-rsa.c auth-rh-rsa.c \
sshpty.c sshlogin.c servconf.c serverloop.c \
sshpty.c sshlogin.c servconf.c serverloop.c uidswap.c \
auth.c auth1.c auth2.c auth-options.c session.c \
auth-chall.c auth2-chall.c groupaccess.c \
auth-skey.c auth-bsdauth.c
auth-skey.c auth-bsdauth.c monitor_mm.c monitor.c \
auth2-none.c auth2-passwd.c auth2-pubkey.c \
auth2-hostbased.c auth2-kbdint.c
.include <bsd.own.mk> # for KERBEROS and AFS
@ -21,14 +23,14 @@ SRCS= sshd.c auth-rhosts.c auth-passwd.c auth-rsa.c auth-rh-rsa.c \
CFLAGS+=-DKRB5 -I${DESTDIR}/usr/include/kerberosV
SRCS+= auth-krb5.c
LDADD+= -lkrb5 -lkafs -lasn1 -lcom_err
DPADD+= ${LIBKRB5} ${LIBKAFS} ${LIBASN1}
DPADD+= ${LIBKRB5} ${LIBKAFS} ${LIBASN1} ${LIBCOM_ERR}
.endif # KERBEROS5
.if (${KERBEROS:L} == "yes")
.if (${AFS:L} == "yes")
CFLAGS+= -DAFS
LDADD+= -lkafs
DPADD+= ${LIBKRBAFS}
DPADD+= ${LIBKAFS}
.endif # AFS
CFLAGS+= -DKRB4 -I${DESTDIR}/usr/include/kerberosIV
SRCS+= auth-krb4.c
@ -39,7 +41,7 @@ DPADD+= ${LIBKRB}
.include <bsd.prog.mk>
LDADD+= -lcrypto -lutil -lz -ldes
DPADD+= ${LIBCRYPTO} ${LIBUTIL} ${LIBZ}
DPADD+= ${LIBCRYPTO} ${LIBUTIL} ${LIBZ} ${LIBDES}
.if (${TCP_WRAPPERS:L} == "yes")
CFLAGS+= -DLIBWRAP

707
crypto/openssh/sshd_config.5 Normal file
View File

@ -0,0 +1,707 @@
.\" -*- nroff -*-
.\"
.\" Author: Tatu Ylonen <ylo@cs.hut.fi>
.\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
.\" All rights reserved
.\"
.\" As far as I am concerned, the code I have written for this software
.\" can be used freely for any purpose. Any derived versions of this
.\" software must be clearly marked as such, and if the derived work is
.\" incompatible with the protocol description in the RFC file, it must be
.\" called by a name other than "ssh" or "Secure Shell".
.\"
.\" Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
.\" Copyright (c) 1999 Aaron Campbell. All rights reserved.
.\" Copyright (c) 1999 Theo de Raadt. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $OpenBSD: sshd_config.5,v 1.3 2002/06/20 23:37:12 markus Exp $
.Dd September 25, 1999
.Dt SSHD_CONFIG 5
.Os
.Sh NAME
.Nm sshd_config
.Nd OpenSSH SSH daemon configuration file
.Sh SYNOPSIS
.Bl -tag -width Ds -compact
.It Pa /etc/ssh/sshd_config
.El
.Sh DESCRIPTION
.Nm sshd
reads configuration data from
.Pa /etc/ssh/sshd_config
(or the file specified with
.Fl f
on the command line).
The file contains keyword-argument pairs, one per line.
Lines starting with
.Ql #
and empty lines are interpreted as comments.
.Pp
The possible
keywords and their meanings are as follows (note that
keywords are case-insensitive and arguments are case-sensitive):
.Bl -tag -width Ds
.It Cm AFSTokenPassing
Specifies whether an AFS token may be forwarded to the server.
Default is
.Dq no .
.It Cm AllowGroups
This keyword can be followed by a list of group name patterns, separated
by spaces.
If specified, login is allowed only for users whose primary
group or supplementary group list matches one of the patterns.
.Ql \&*
and
.Ql ?
can be used as
wildcards in the patterns.
Only group names are valid; a numerical group ID is not recognized.
By default, login is allowed for all groups.
.Pp
.It Cm AllowTcpForwarding
Specifies whether TCP forwarding is permitted.
The default is
.Dq yes .
Note that disabling TCP forwarding does not improve security unless
users are also denied shell access, as they can always install their
own forwarders.
.Pp
.It Cm AllowUsers
This keyword can be followed by a list of user name patterns, separated
by spaces.
If specified, login is allowed only for users names that
match one of the patterns.
.Ql \&*
and
.Ql ?
can be used as
wildcards in the patterns.
Only user names are valid; a numerical user ID is not recognized.
By default, login is allowed for all users.
If the pattern takes the form USER@HOST then USER and HOST
are separately checked, restricting logins to particular
users from particular hosts.
.Pp
.It Cm AuthorizedKeysFile
Specifies the file that contains the public keys that can be used
for user authentication.
.Cm AuthorizedKeysFile
may contain tokens of the form %T which are substituted during connection
set-up. The following tokens are defined: %% is replaced by a literal '%',
%h is replaced by the home directory of the user being authenticated and
%u is replaced by the username of that user.
After expansion,
.Cm AuthorizedKeysFile
is taken to be an absolute path or one relative to the user's home
directory.
The default is
.Dq .ssh/authorized_keys .
.It Cm Banner
In some jurisdictions, sending a warning message before authentication
may be relevant for getting legal protection.
The contents of the specified file are sent to the remote user before
authentication is allowed.
This option is only available for protocol version 2.
By default, no banner is displayed.
.Pp
.It Cm ChallengeResponseAuthentication
Specifies whether challenge response authentication is allowed.
All authentication styles from
.Xr login.conf 5
are supported.
The default is
.Dq yes .
.It Cm Ciphers
Specifies the ciphers allowed for protocol version 2.
Multiple ciphers must be comma-separated.
The default is
.Pp
.Bd -literal
``aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,
aes192-cbc,aes256-cbc''
.Ed
.It Cm ClientAliveInterval
Sets a timeout interval in seconds after which if no data has been received
from the client,
.Nm sshd
will send a message through the encrypted
channel to request a response from the client.
The default
is 0, indicating that these messages will not be sent to the client.
This option applies to protocol version 2 only.
.It Cm ClientAliveCountMax
Sets the number of client alive messages (see above) which may be
sent without
.Nm sshd
receiving any messages back from the client. If this threshold is
reached while client alive messages are being sent,
.Nm sshd
will disconnect the client, terminating the session. It is important
to note that the use of client alive messages is very different from
.Cm KeepAlive
(below). The client alive messages are sent through the
encrypted channel and therefore will not be spoofable. The TCP keepalive
option enabled by
.Cm KeepAlive
is spoofable. The client alive mechanism is valuable when the client or
server depend on knowing when a connection has become inactive.
.Pp
The default value is 3. If
.Cm ClientAliveInterval
(above) is set to 15, and
.Cm ClientAliveCountMax
is left at the default, unresponsive ssh clients
will be disconnected after approximately 45 seconds.
.It Cm Compression
Specifies whether compression is allowed.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq yes .
.It Cm DenyGroups
This keyword can be followed by a list of group name patterns, separated
by spaces.
Login is disallowed for users whose primary group or supplementary
group list matches one of the patterns.
.Ql \&*
and
.Ql ?
can be used as
wildcards in the patterns.
Only group names are valid; a numerical group ID is not recognized.
By default, login is allowed for all groups.
.Pp
.It Cm DenyUsers
This keyword can be followed by a list of user name patterns, separated
by spaces.
Login is disallowed for user names that match one of the patterns.
.Ql \&*
and
.Ql ?
can be used as wildcards in the patterns.
Only user names are valid; a numerical user ID is not recognized.
By default, login is allowed for all users.
If the pattern takes the form USER@HOST then USER and HOST
are separately checked, restricting logins to particular
users from particular hosts.
.It Cm GatewayPorts
Specifies whether remote hosts are allowed to connect to ports
forwarded for the client.
By default,
.Nm sshd
binds remote port forwardings to the loopback address. This
prevents other remote hosts from connecting to forwarded ports.
.Cm GatewayPorts
can be used to specify that
.Nm sshd
should bind remote port forwardings to the wildcard address,
thus allowing remote hosts to connect to forwarded ports.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq no .
.It Cm HostbasedAuthentication
Specifies whether rhosts or /etc/hosts.equiv authentication together
with successful public key client host authentication is allowed
(hostbased authentication).
This option is similar to
.Cm RhostsRSAAuthentication
and applies to protocol version 2 only.
The default is
.Dq no .
.It Cm HostKey
Specifies a file containing a private host key
used by SSH.
The default is
.Pa /etc/ssh/ssh_host_key
for protocol version 1, and
.Pa /etc/ssh/ssh_host_rsa_key
and
.Pa /etc/ssh/ssh_host_dsa_key
for protocol version 2.
Note that
.Nm sshd
will refuse to use a file if it is group/world-accessible.
It is possible to have multiple host key files.
.Dq rsa1
keys are used for version 1 and
.Dq dsa
or
.Dq rsa
are used for version 2 of the SSH protocol.
.It Cm IgnoreRhosts
Specifies that
.Pa .rhosts
and
.Pa .shosts
files will not be used in
.Cm RhostsAuthentication ,
.Cm RhostsRSAAuthentication
or
.Cm HostbasedAuthentication .
.Pp
.Pa /etc/hosts.equiv
and
.Pa /etc/shosts.equiv
are still used.
The default is
.Dq yes .
.It Cm IgnoreUserKnownHosts
Specifies whether
.Nm sshd
should ignore the user's
.Pa $HOME/.ssh/known_hosts
during
.Cm RhostsRSAAuthentication
or
.Cm HostbasedAuthentication .
The default is
.Dq no .
.It Cm KeepAlive
Specifies whether the system should send TCP keepalive messages to the
other side.
If they are sent, death of the connection or crash of one
of the machines will be properly noticed.
However, this means that
connections will die if the route is down temporarily, and some people
find it annoying.
On the other hand, if keepalives are not sent,
sessions may hang indefinitely on the server, leaving
.Dq ghost
users and consuming server resources.
.Pp
The default is
.Dq yes
(to send keepalives), and the server will notice
if the network goes down or the client host crashes.
This avoids infinitely hanging sessions.
.Pp
To disable keepalives, the value should be set to
.Dq no .
.It Cm KerberosAuthentication
Specifies whether Kerberos authentication is allowed.
This can be in the form of a Kerberos ticket, or if
.Cm PasswordAuthentication
is yes, the password provided by the user will be validated through
the Kerberos KDC.
To use this option, the server needs a
Kerberos servtab which allows the verification of the KDC's identity.
Default is
.Dq no .
.It Cm KerberosOrLocalPasswd
If set then if password authentication through Kerberos fails then
the password will be validated via any additional local mechanism
such as
.Pa /etc/passwd .
Default is
.Dq yes .
.It Cm KerberosTgtPassing
Specifies whether a Kerberos TGT may be forwarded to the server.
Default is
.Dq no ,
as this only works when the Kerberos KDC is actually an AFS kaserver.
.It Cm KerberosTicketCleanup
Specifies whether to automatically destroy the user's ticket cache
file on logout.
Default is
.Dq yes .
.It Cm KeyRegenerationInterval
In protocol version 1, the ephemeral server key is automatically regenerated
after this many seconds (if it has been used).
The purpose of regeneration is to prevent
decrypting captured sessions by later breaking into the machine and
stealing the keys.
The key is never stored anywhere.
If the value is 0, the key is never regenerated.
The default is 3600 (seconds).
.It Cm ListenAddress
Specifies the local addresses
.Nm sshd
should listen on.
The following forms may be used:
.Pp
.Bl -item -offset indent -compact
.It
.Cm ListenAddress
.Sm off
.Ar host No | Ar IPv4_addr No | Ar IPv6_addr
.Sm on
.It
.Cm ListenAddress
.Sm off
.Ar host No | Ar IPv4_addr No : Ar port
.Sm on
.It
.Cm ListenAddress
.Sm off
.Oo
.Ar host No | Ar IPv6_addr Oc : Ar port
.Sm on
.El
.Pp
If
.Ar port
is not specified,
.Nm sshd
will listen on the address and all prior
.Cm Port
options specified. The default is to listen on all local
addresses. Multiple
.Cm ListenAddress
options are permitted. Additionally, any
.Cm Port
options must precede this option for non port qualified addresses.
.It Cm LoginGraceTime
The server disconnects after this time if the user has not
successfully logged in.
If the value is 0, there is no time limit.
The default is 600 (seconds).
.It Cm LogLevel
Gives the verbosity level that is used when logging messages from
.Nm sshd .
The possible values are:
QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2 and DEBUG3.
The default is INFO. DEBUG and DEBUG1 are equivalent. DEBUG2
and DEBUG3 each specify higher levels of debugging output.
Logging with a DEBUG level violates the privacy of users
and is not recommended.
.It Cm MACs
Specifies the available MAC (message authentication code) algorithms.
The MAC algorithm is used in protocol version 2
for data integrity protection.
Multiple algorithms must be comma-separated.
The default is
.Dq hmac-md5,hmac-sha1,hmac-ripemd160,hmac-sha1-96,hmac-md5-96 .
.It Cm MaxStartups
Specifies the maximum number of concurrent unauthenticated connections to the
.Nm sshd
daemon.
Additional connections will be dropped until authentication succeeds or the
.Cm LoginGraceTime
expires for a connection.
The default is 10.
.Pp
Alternatively, random early drop can be enabled by specifying
the three colon separated values
.Dq start:rate:full
(e.g., "10:30:60").
.Nm sshd
will refuse connection attempts with a probability of
.Dq rate/100
(30%)
if there are currently
.Dq start
(10)
unauthenticated connections.
The probability increases linearly and all connection attempts
are refused if the number of unauthenticated connections reaches
.Dq full
(60).
.It Cm PasswordAuthentication
Specifies whether password authentication is allowed.
The default is
.Dq yes .
.It Cm PermitEmptyPasswords
When password authentication is allowed, it specifies whether the
server allows login to accounts with empty password strings.
The default is
.Dq no .
.It Cm PermitRootLogin
Specifies whether root can login using
.Xr ssh 1 .
The argument must be
.Dq yes ,
.Dq without-password ,
.Dq forced-commands-only
or
.Dq no .
The default is
.Dq yes .
.Pp
If this option is set to
.Dq without-password
password authentication is disabled for root.
.Pp
If this option is set to
.Dq forced-commands-only
root login with public key authentication will be allowed,
but only if the
.Ar command
option has been specified
(which may be useful for taking remote backups even if root login is
normally not allowed). All other authentication methods are disabled
for root.
.Pp
If this option is set to
.Dq no
root is not allowed to login.
.It Cm PidFile
Specifies the file that contains the process identifier of the
.Nm sshd
daemon.
The default is
.Pa /var/run/sshd.pid .
.It Cm Port
Specifies the port number that
.Nm sshd
listens on.
The default is 22.
Multiple options of this type are permitted.
See also
.Cm ListenAddress .
.It Cm PrintLastLog
Specifies whether
.Nm sshd
should print the date and time when the user last logged in.
The default is
.Dq yes .
.It Cm PrintMotd
Specifies whether
.Nm sshd
should print
.Pa /etc/motd
when a user logs in interactively.
(On some systems it is also printed by the shell,
.Pa /etc/profile ,
or equivalent.)
The default is
.Dq yes .
.It Cm Protocol
Specifies the protocol versions
.Nm sshd
should support.
The possible values are
.Dq 1
and
.Dq 2 .
Multiple versions must be comma-separated.
The default is
.Dq 2,1 .
.It Cm PubkeyAuthentication
Specifies whether public key authentication is allowed.
The default is
.Dq yes .
Note that this option applies to protocol version 2 only.
.It Cm RhostsAuthentication
Specifies whether authentication using rhosts or /etc/hosts.equiv
files is sufficient.
Normally, this method should not be permitted because it is insecure.
.Cm RhostsRSAAuthentication
should be used
instead, because it performs RSA-based host authentication in addition
to normal rhosts or /etc/hosts.equiv authentication.
The default is
.Dq no .
This option applies to protocol version 1 only.
.It Cm RhostsRSAAuthentication
Specifies whether rhosts or /etc/hosts.equiv authentication together
with successful RSA host authentication is allowed.
The default is
.Dq no .
This option applies to protocol version 1 only.
.It Cm RSAAuthentication
Specifies whether pure RSA authentication is allowed.
The default is
.Dq yes .
This option applies to protocol version 1 only.
.It Cm ServerKeyBits
Defines the number of bits in the ephemeral protocol version 1 server key.
The minimum value is 512, and the default is 768.
.It Cm StrictModes
Specifies whether
.Nm sshd
should check file modes and ownership of the
user's files and home directory before accepting login.
This is normally desirable because novices sometimes accidentally leave their
directory or files world-writable.
The default is
.Dq yes .
.It Cm Subsystem
Configures an external subsystem (e.g., file transfer daemon).
Arguments should be a subsystem name and a command to execute upon subsystem
request.
The command
.Xr sftp-server 8
implements the
.Dq sftp
file transfer subsystem.
By default no subsystems are defined.
Note that this option applies to protocol version 2 only.
.It Cm SyslogFacility
Gives the facility code that is used when logging messages from
.Nm sshd .
The possible values are: DAEMON, USER, AUTH, LOCAL0, LOCAL1, LOCAL2,
LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.
The default is AUTH.
.It Cm UseLogin
Specifies whether
.Xr login 1
is used for interactive login sessions.
The default is
.Dq no .
Note that
.Xr login 1
is never used for remote command execution.
Note also, that if this is enabled,
.Cm X11Forwarding
will be disabled because
.Xr login 1
does not know how to handle
.Xr xauth 1
cookies. If
.Cm UsePrivilegeSeparation
is specified, it will be disabled after authentication.
.It Cm UsePrivilegeSeparation
Specifies whether
.Nm sshd
separates privileges by creating an unprivileged child process
to deal with incoming network traffic. After successful authentication,
another process will be created that has the privilege of the authenticated
user. The goal of privilege separation is to prevent privilege
escalation by containing any corruption within the unprivileged processes.
The default is
.Dq yes .
.It Cm VerifyReverseMapping
Specifies whether
.Nm sshd
should try to verify the remote host name and check that
the resolved host name for the remote IP address maps back to the
very same IP address.
The default is
.Dq no .
.It Cm X11DisplayOffset
Specifies the first display number available for
.Nm sshd Ns 's
X11 forwarding.
This prevents
.Nm sshd
from interfering with real X11 servers.
The default is 10.
.It Cm X11Forwarding
Specifies whether X11 forwarding is permitted.
The default is
.Dq no .
Note that disabling X11 forwarding does not improve security in any
way, as users can always install their own forwarders.
X11 forwarding is automatically disabled if
.Cm UseLogin
is enabled.
.It Cm X11UseLocalhost
Specifies whether
.Nm sshd
should bind the X11 forwarding server to the loopback address or to
the wildcard address. By default,
.Nm sshd
binds the forwarding server to the loopback address and sets the
hostname part of the
.Ev DISPLAY
environment variable to
.Dq localhost .
This prevents remote hosts from connecting to the fake display.
However, some older X11 clients may not function with this
configuration.
.Cm X11UseLocalhost
may be set to
.Dq no
to specify that the forwarding server should be bound to the wildcard
address.
The argument must be
.Dq yes
or
.Dq no .
The default is
.Dq yes .
.It Cm XAuthLocation
Specifies the location of the
.Xr xauth 1
program.
The default is
.Pa /usr/X11R6/bin/xauth .
.El
.Ss Time Formats
.Pp
.Nm sshd
command-line arguments and configuration file options that specify time
may be expressed using a sequence of the form:
.Sm off
.Ar time Oo Ar qualifier Oc ,
.Sm on
where
.Ar time
is a positive integer value and
.Ar qualifier
is one of the following:
.Pp
.Bl -tag -width Ds -compact -offset indent
.It Cm <none>
seconds
.It Cm s | Cm S
seconds
.It Cm m | Cm M
minutes
.It Cm h | Cm H
hours
.It Cm d | Cm D
days
.It Cm w | Cm W
weeks
.El
.Pp
Each member of the sequence is added together to calculate
the total time value.
.Pp
Time format examples:
.Pp
.Bl -tag -width Ds -compact -offset indent
.It 600
600 seconds (10 minutes)
.It 10m
10 minutes
.It 1h30m
1 hour 30 minutes (90 minutes)
.El
.Sh FILES
.Bl -tag -width Ds
.It Pa /etc/ssh/sshd_config
Contains configuration data for
.Nm sshd .
This file should be writable by root only, but it is recommended
(though not necessary) that it be world-readable.
.El
.Sh AUTHORS
OpenSSH is a derivative of the original and free
ssh 1.2.12 release by Tatu Ylonen.
Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
Theo de Raadt and Dug Song
removed many bugs, re-added newer features and
created OpenSSH.
Markus Friedl contributed the support for SSH
protocol versions 1.5 and 2.0.
Niels Provos and Markus Friedl contributed support
for privilege separation.
.Sh SEE ALSO
.Xr sshd 8

20
crypto/openssh/ttymodes.c
View File

@ -43,7 +43,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: ttymodes.c,v 1.16 2001/12/27 20:39:58 markus Exp $");
RCSID("$OpenBSD: ttymodes.c,v 1.18 2002/06/19 00:27:55 deraadt Exp $");
#include "packet.h"
#include "log.h"
@ -307,7 +307,6 @@ tty_make_modes(int fd, struct termios *tiop)
else
packet_put_raw(buffer_ptr(&buf), buffer_len(&buf));
buffer_free(&buf);
return;
}
/*
@ -402,17 +401,17 @@ tty_parse_modes(int fd, int *n_bytes_ptr)
* SSH1:
* Opcodes 1 to 127 are defined to have
* a one-byte argument.
* Opcodes 128 to 159 are defined to have
* an integer argument.
*/
* Opcodes 128 to 159 are defined to have
* an integer argument.
*/
if (opcode > 0 && opcode < 128) {
n_bytes += 1;
(void) packet_get_char();
break;
} else if (opcode >= 128 && opcode < 160) {
n_bytes += 4;
(void) packet_get_int();
break;
n_bytes += 4;
(void) packet_get_int();
break;
} else {
/*
* It is a truly undefined opcode (160 to 255).
@ -423,7 +422,7 @@ tty_parse_modes(int fd, int *n_bytes_ptr)
*/
log("parse_tty_modes: unknown opcode %d", opcode);
goto set;
}
}
} else {
/*
* SSH2:
@ -440,7 +439,7 @@ tty_parse_modes(int fd, int *n_bytes_ptr)
log("parse_tty_modes: unknown opcode %d", opcode);
goto set;
}
}
}
}
}
@ -457,5 +456,4 @@ tty_parse_modes(int fd, int *n_bytes_ptr)
/* Set the new modes for the terminal. */
if (tcsetattr(fd, TCSANOW, &tio) == -1)
log("Setting tty modes failed: %.100s", strerror(errno));
return;
}

21
crypto/openssh/uidswap.c
View File

@ -12,7 +12,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: uidswap.c,v 1.19 2001/12/19 07:18:56 deraadt Exp $");
RCSID("$OpenBSD: uidswap.c,v 1.22 2002/05/28 21:24:00 stevesk Exp $");
#include "log.h"
#include "uidswap.h"
@ -46,8 +46,8 @@ temporarily_use_uid(struct passwd *pw)
{
/* Save the current euid, and egroups. */
saved_euid = geteuid();
debug("temporarily_use_uid: %d/%d (e=%d)",
pw->pw_uid, pw->pw_gid, saved_euid);
debug("temporarily_use_uid: %u/%u (e=%u)",
(u_int)pw->pw_uid, (u_int)pw->pw_gid, (u_int)saved_euid);
if (saved_euid != 0) {
privileged = 0;
return;
@ -71,12 +71,11 @@ temporarily_use_uid(struct passwd *pw)
/* Set the effective uid to the given (unprivileged) uid. */
if (setgroups(user_groupslen, user_groups) < 0)
fatal("setgroups: %.100s", strerror(errno));
pw->pw_gid = pw->pw_gid;
if (setegid(pw->pw_gid) < 0)
fatal("setegid %u: %.100s", (u_int) pw->pw_gid,
fatal("setegid %u: %.100s", (u_int)pw->pw_gid,
strerror(errno));
if (seteuid(pw->pw_uid) == -1)
fatal("seteuid %u: %.100s", (u_int) pw->pw_uid,
fatal("seteuid %u: %.100s", (u_int)pw->pw_uid,
strerror(errno));
}
@ -94,11 +93,11 @@ restore_uid(void)
fatal("restore_uid: temporarily_use_uid not effective");
/* Set the effective uid back to the saved privileged uid. */
if (seteuid(saved_euid) < 0)
fatal("seteuid %u: %.100s", (u_int) saved_euid, strerror(errno));
fatal("seteuid %u: %.100s", (u_int)saved_euid, strerror(errno));
if (setgroups(saved_egroupslen, saved_egroups) < 0)
fatal("setgroups: %.100s", strerror(errno));
if (setegid(saved_egid) < 0)
fatal("setegid %u: %.100s", (u_int) saved_egid, strerror(errno));
fatal("setegid %u: %.100s", (u_int)saved_egid, strerror(errno));
temporarily_use_uid_effective = 0;
}
@ -110,9 +109,9 @@ void
permanently_set_uid(struct passwd *pw)
{
if (temporarily_use_uid_effective)
fatal("restore_uid: temporarily_use_uid effective");
fatal("permanently_set_uid: temporarily_use_uid effective");
if (setgid(pw->pw_gid) < 0)
fatal("setgid %u: %.100s", (u_int) pw->pw_gid, strerror(errno));
fatal("setgid %u: %.100s", (u_int)pw->pw_gid, strerror(errno));
if (setuid(pw->pw_uid) < 0)
fatal("setuid %u: %.100s", (u_int) pw->pw_uid, strerror(errno));
fatal("setuid %u: %.100s", (u_int)pw->pw_uid, strerror(errno));
}

4
crypto/openssh/xmalloc.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: xmalloc.h,v 1.8 2002/03/04 17:27:39 stevesk Exp $ */
/* $OpenBSD: xmalloc.h,v 1.9 2002/06/19 00:27:55 deraadt Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -22,6 +22,6 @@
void *xmalloc(size_t);
void *xrealloc(void *, size_t);
void xfree(void *);
char *xstrdup(const char *);
char *xstrdup(const char *);
#endif /* XMALLOC_H */