d4af9e693f
I have worked hard to reduce diffs against the vendor branch. One notable change in that respect is that we no longer prefer DSA over RSA - the reasons for doing so went away years ago. This may cause some surprises, as ssh will warn about unknown host keys even for hosts whose keys haven't changed. MFC after: 6 weeks
256 lines
6.7 KiB
C
256 lines
6.7 KiB
C
/*
|
|
* Copyright (c) 2000, 2001, Corinna Vinschen <vinschen@cygnus.com>
|
|
*
|
|
* 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.
|
|
*
|
|
* Created: Sat Sep 02 12:17:00 2000 cv
|
|
*
|
|
* This file contains functions for forcing opened file descriptors to
|
|
* binary mode on Windows systems.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
|
|
#ifdef HAVE_CYGWIN
|
|
|
|
#if defined(open) && open == binary_open
|
|
# undef open
|
|
#endif
|
|
#if defined(pipe) && open == binary_pipe
|
|
# undef pipe
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/utsname.h>
|
|
#include <sys/vfs.h>
|
|
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <windows.h>
|
|
|
|
#include "xmalloc.h"
|
|
#define is_winnt (GetVersion() < 0x80000000)
|
|
|
|
#define ntsec_on(c) ((c) && strstr((c),"ntsec") && !strstr((c),"nontsec"))
|
|
#define ntsec_off(c) ((c) && strstr((c),"nontsec"))
|
|
#define ntea_on(c) ((c) && strstr((c),"ntea") && !strstr((c),"nontea"))
|
|
|
|
int
|
|
binary_open(const char *filename, int flags, ...)
|
|
{
|
|
va_list ap;
|
|
mode_t mode;
|
|
|
|
va_start(ap, flags);
|
|
mode = va_arg(ap, mode_t);
|
|
va_end(ap);
|
|
return (open(filename, flags | O_BINARY, mode));
|
|
}
|
|
|
|
int
|
|
binary_pipe(int fd[2])
|
|
{
|
|
int ret = pipe(fd);
|
|
|
|
if (!ret) {
|
|
setmode(fd[0], O_BINARY);
|
|
setmode(fd[1], O_BINARY);
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
#define HAS_CREATE_TOKEN 1
|
|
#define HAS_NTSEC_BY_DEFAULT 2
|
|
#define HAS_CREATE_TOKEN_WO_NTSEC 3
|
|
|
|
static int
|
|
has_capability(int what)
|
|
{
|
|
static int inited;
|
|
static int has_create_token;
|
|
static int has_ntsec_by_default;
|
|
static int has_create_token_wo_ntsec;
|
|
|
|
/*
|
|
* has_capability() basically calls uname() and checks if
|
|
* specific capabilities of Cygwin can be evaluated from that.
|
|
* This simplifies the calling functions which only have to ask
|
|
* for a capability using has_capability() instead of having
|
|
* to figure that out by themselves.
|
|
*/
|
|
if (!inited) {
|
|
struct utsname uts;
|
|
|
|
if (!uname(&uts)) {
|
|
int major_high = 0, major_low = 0, minor = 0;
|
|
int api_major_version = 0, api_minor_version = 0;
|
|
char *c;
|
|
|
|
sscanf(uts.release, "%d.%d.%d", &major_high,
|
|
&major_low, &minor);
|
|
if ((c = strchr(uts.release, '(')) != NULL) {
|
|
sscanf(c + 1, "%d.%d", &api_major_version,
|
|
&api_minor_version);
|
|
}
|
|
if (major_high > 1 ||
|
|
(major_high == 1 && (major_low > 3 ||
|
|
(major_low == 3 && minor >= 2))))
|
|
has_create_token = 1;
|
|
if (api_major_version > 0 || api_minor_version >= 56)
|
|
has_ntsec_by_default = 1;
|
|
if (major_high > 1 ||
|
|
(major_high == 1 && major_low >= 5))
|
|
has_create_token_wo_ntsec = 1;
|
|
inited = 1;
|
|
}
|
|
}
|
|
switch (what) {
|
|
case HAS_CREATE_TOKEN:
|
|
return (has_create_token);
|
|
case HAS_NTSEC_BY_DEFAULT:
|
|
return (has_ntsec_by_default);
|
|
case HAS_CREATE_TOKEN_WO_NTSEC:
|
|
return (has_create_token_wo_ntsec);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
check_nt_auth(int pwd_authenticated, struct passwd *pw)
|
|
{
|
|
/*
|
|
* The only authentication which is able to change the user
|
|
* context on NT systems is the password authentication. So
|
|
* we deny all requsts for changing the user context if another
|
|
* authentication method is used.
|
|
*
|
|
* This doesn't apply to Cygwin versions >= 1.3.2 anymore which
|
|
* uses the undocumented NtCreateToken() call to create a user
|
|
* token if the process has the appropriate privileges and if
|
|
* CYGWIN ntsec setting is on.
|
|
*/
|
|
static int has_create_token = -1;
|
|
|
|
if (pw == NULL)
|
|
return 0;
|
|
if (is_winnt) {
|
|
if (has_create_token < 0) {
|
|
char *cygwin = getenv("CYGWIN");
|
|
|
|
has_create_token = 0;
|
|
if (has_capability(HAS_CREATE_TOKEN) &&
|
|
(ntsec_on(cygwin) ||
|
|
(has_capability(HAS_NTSEC_BY_DEFAULT) &&
|
|
!ntsec_off(cygwin)) ||
|
|
has_capability(HAS_CREATE_TOKEN_WO_NTSEC)))
|
|
has_create_token = 1;
|
|
}
|
|
if (has_create_token < 1 &&
|
|
!pwd_authenticated && geteuid() != pw->pw_uid)
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
check_ntsec(const char *filename)
|
|
{
|
|
return (pathconf(filename, _PC_POSIX_PERMISSIONS));
|
|
}
|
|
|
|
void
|
|
register_9x_service(void)
|
|
{
|
|
HINSTANCE kerneldll;
|
|
DWORD (*RegisterServiceProcess)(DWORD, DWORD);
|
|
|
|
/* The service register mechanism in 9x/Me is pretty different from
|
|
* NT/2K/XP. In NT/2K/XP we're using a special service starter
|
|
* application to register and control sshd as service. This method
|
|
* doesn't play nicely with 9x/Me. For that reason we register here
|
|
* as service when running under 9x/Me. This function is only called
|
|
* by the child sshd when it's going to daemonize.
|
|
*/
|
|
if (is_winnt)
|
|
return;
|
|
if (!(kerneldll = LoadLibrary("KERNEL32.DLL")))
|
|
return;
|
|
if (!(RegisterServiceProcess = (DWORD (*)(DWORD, DWORD))
|
|
GetProcAddress(kerneldll, "RegisterServiceProcess")))
|
|
return;
|
|
RegisterServiceProcess(0, 1);
|
|
}
|
|
|
|
#define NL(x) x, (sizeof (x) - 1)
|
|
#define WENV_SIZ (sizeof (wenv_arr) / sizeof (wenv_arr[0]))
|
|
|
|
static struct wenv {
|
|
const char *name;
|
|
size_t namelen;
|
|
} wenv_arr[] = {
|
|
{ NL("ALLUSERSPROFILE=") },
|
|
{ NL("COMMONPROGRAMFILES=") },
|
|
{ NL("COMPUTERNAME=") },
|
|
{ NL("COMSPEC=") },
|
|
{ NL("CYGWIN=") },
|
|
{ NL("NUMBER_OF_PROCESSORS=") },
|
|
{ NL("OS=") },
|
|
{ NL("PATH=") },
|
|
{ NL("PATHEXT=") },
|
|
{ NL("PROCESSOR_ARCHITECTURE=") },
|
|
{ NL("PROCESSOR_IDENTIFIER=") },
|
|
{ NL("PROCESSOR_LEVEL=") },
|
|
{ NL("PROCESSOR_REVISION=") },
|
|
{ NL("PROGRAMFILES=") },
|
|
{ NL("SYSTEMDRIVE=") },
|
|
{ NL("SYSTEMROOT=") },
|
|
{ NL("TMP=") },
|
|
{ NL("TEMP=") },
|
|
{ NL("WINDIR=") }
|
|
};
|
|
|
|
char **
|
|
fetch_windows_environment(void)
|
|
{
|
|
char **e, **p;
|
|
unsigned int i, idx = 0;
|
|
|
|
p = xcalloc(WENV_SIZ + 1, sizeof(char *));
|
|
for (e = environ; *e != NULL; ++e) {
|
|
for (i = 0; i < WENV_SIZ; ++i) {
|
|
if (!strncmp(*e, wenv_arr[i].name, wenv_arr[i].namelen))
|
|
p[idx++] = *e;
|
|
}
|
|
}
|
|
p[idx] = NULL;
|
|
return p;
|
|
}
|
|
|
|
void
|
|
free_windows_environment(char **p)
|
|
{
|
|
xfree(p);
|
|
}
|
|
|
|
#endif /* HAVE_CYGWIN */
|