This release fixes a number of security bugs and has minor new features and bug fixes. Security fixes, from the release notes (https://www.openssh.com/txt/release-9.3): This release contains fixes for a security problem and a memory safety problem. The memory safety problem is not believed to be exploitable, but we report most network-reachable memory faults as security bugs. * ssh-add(1): when adding smartcard keys to ssh-agent(1) with the per-hop destination constraints (ssh-add -h ...) added in OpenSSH 8.9, a logic error prevented the constraints from being communicated to the agent. This resulted in the keys being added without constraints. The common cases of non-smartcard keys and keys without destination constraints are unaffected. This problem was reported by Luci Stanescu. * ssh(1): Portable OpenSSH provides an implementation of the getrrsetbyname(3) function if the standard library does not provide it, for use by the VerifyHostKeyDNS feature. A specifically crafted DNS response could cause this function to perform an out-of-bounds read of adjacent stack data, but this condition does not appear to be exploitable beyond denial-of- service to the ssh(1) client. The getrrsetbyname(3) replacement is only included if the system's standard library lacks this function and portable OpenSSH was not compiled with the ldns library (--with-ldns). getrrsetbyname(3) is only invoked if using VerifyHostKeyDNS to fetch SSHFP records. This problem was found by the Coverity static analyzer. Sponsored by: The FreeBSD Foundation
3193 lines
94 KiB
C
3193 lines
94 KiB
C
|
|
/* $OpenBSD: servconf.c,v 1.392 2023/03/05 05:34:09 dtucker Exp $ */
|
|
/*
|
|
* 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".
|
|
*/
|
|
|
|
#include "includes.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/stat.h>
|
|
#ifdef __OpenBSD__
|
|
#include <sys/sysctl.h>
|
|
#endif
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/ip.h>
|
|
#ifdef HAVE_NET_ROUTE_H
|
|
#include <net/route.h>
|
|
#endif
|
|
|
|
#include <ctype.h>
|
|
#include <netdb.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
#include <stdarg.h>
|
|
#include <errno.h>
|
|
#ifdef HAVE_UTIL_H
|
|
#include <util.h>
|
|
#endif
|
|
#ifdef USE_SYSTEM_GLOB
|
|
# include <glob.h>
|
|
#else
|
|
# include "openbsd-compat/glob.h"
|
|
#endif
|
|
|
|
#include "openbsd-compat/sys-queue.h"
|
|
#include "xmalloc.h"
|
|
#include "ssh.h"
|
|
#include "log.h"
|
|
#include "sshbuf.h"
|
|
#include "misc.h"
|
|
#include "servconf.h"
|
|
#include "pathnames.h"
|
|
#include "cipher.h"
|
|
#include "sshkey.h"
|
|
#include "kex.h"
|
|
#include "mac.h"
|
|
#include "match.h"
|
|
#include "channels.h"
|
|
#include "groupaccess.h"
|
|
#include "canohost.h"
|
|
#include "packet.h"
|
|
#include "ssherr.h"
|
|
#include "hostfile.h"
|
|
#include "auth.h"
|
|
#include "myproposal.h"
|
|
#include "digest.h"
|
|
#include "version.h"
|
|
|
|
static void add_listen_addr(ServerOptions *, const char *,
|
|
const char *, int);
|
|
static void add_one_listen_addr(ServerOptions *, const char *,
|
|
const char *, int);
|
|
static void parse_server_config_depth(ServerOptions *options,
|
|
const char *filename, struct sshbuf *conf, struct include_list *includes,
|
|
struct connection_info *connectinfo, int flags, int *activep, int depth);
|
|
|
|
/* Use of privilege separation or not */
|
|
extern int use_privsep;
|
|
extern struct sshbuf *cfg;
|
|
|
|
/* Initializes the server options to their default values. */
|
|
|
|
void
|
|
initialize_server_options(ServerOptions *options)
|
|
{
|
|
memset(options, 0, sizeof(*options));
|
|
|
|
/* Portable-specific options */
|
|
options->use_pam = -1;
|
|
|
|
/* Standard Options */
|
|
options->num_ports = 0;
|
|
options->ports_from_cmdline = 0;
|
|
options->queued_listen_addrs = NULL;
|
|
options->num_queued_listens = 0;
|
|
options->listen_addrs = NULL;
|
|
options->num_listen_addrs = 0;
|
|
options->address_family = -1;
|
|
options->routing_domain = NULL;
|
|
options->num_host_key_files = 0;
|
|
options->num_host_cert_files = 0;
|
|
options->host_key_agent = NULL;
|
|
options->pid_file = NULL;
|
|
options->login_grace_time = -1;
|
|
options->permit_root_login = PERMIT_NOT_SET;
|
|
options->ignore_rhosts = -1;
|
|
options->ignore_user_known_hosts = -1;
|
|
options->print_motd = -1;
|
|
options->print_lastlog = -1;
|
|
options->x11_forwarding = -1;
|
|
options->x11_display_offset = -1;
|
|
options->x11_use_localhost = -1;
|
|
options->permit_tty = -1;
|
|
options->permit_user_rc = -1;
|
|
options->xauth_location = NULL;
|
|
options->strict_modes = -1;
|
|
options->tcp_keep_alive = -1;
|
|
options->log_facility = SYSLOG_FACILITY_NOT_SET;
|
|
options->log_level = SYSLOG_LEVEL_NOT_SET;
|
|
options->num_log_verbose = 0;
|
|
options->log_verbose = NULL;
|
|
options->hostbased_authentication = -1;
|
|
options->hostbased_uses_name_from_packet_only = -1;
|
|
options->hostbased_accepted_algos = NULL;
|
|
options->hostkeyalgorithms = NULL;
|
|
options->pubkey_authentication = -1;
|
|
options->pubkey_auth_options = -1;
|
|
options->pubkey_accepted_algos = NULL;
|
|
options->kerberos_authentication = -1;
|
|
options->kerberos_or_local_passwd = -1;
|
|
options->kerberos_ticket_cleanup = -1;
|
|
options->kerberos_get_afs_token = -1;
|
|
options->gss_authentication=-1;
|
|
options->gss_cleanup_creds = -1;
|
|
options->gss_strict_acceptor = -1;
|
|
options->password_authentication = -1;
|
|
options->kbd_interactive_authentication = -1;
|
|
options->permit_empty_passwd = -1;
|
|
options->permit_user_env = -1;
|
|
options->permit_user_env_allowlist = NULL;
|
|
options->compression = -1;
|
|
options->rekey_limit = -1;
|
|
options->rekey_interval = -1;
|
|
options->allow_tcp_forwarding = -1;
|
|
options->allow_streamlocal_forwarding = -1;
|
|
options->allow_agent_forwarding = -1;
|
|
options->num_allow_users = 0;
|
|
options->num_deny_users = 0;
|
|
options->num_allow_groups = 0;
|
|
options->num_deny_groups = 0;
|
|
options->ciphers = NULL;
|
|
options->macs = NULL;
|
|
options->kex_algorithms = NULL;
|
|
options->ca_sign_algorithms = NULL;
|
|
options->fwd_opts.gateway_ports = -1;
|
|
options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
|
|
options->fwd_opts.streamlocal_bind_unlink = -1;
|
|
options->num_subsystems = 0;
|
|
options->max_startups_begin = -1;
|
|
options->max_startups_rate = -1;
|
|
options->max_startups = -1;
|
|
options->per_source_max_startups = -1;
|
|
options->per_source_masklen_ipv4 = -1;
|
|
options->per_source_masklen_ipv6 = -1;
|
|
options->max_authtries = -1;
|
|
options->max_sessions = -1;
|
|
options->banner = NULL;
|
|
options->use_dns = -1;
|
|
options->client_alive_interval = -1;
|
|
options->client_alive_count_max = -1;
|
|
options->num_authkeys_files = 0;
|
|
options->num_accept_env = 0;
|
|
options->num_setenv = 0;
|
|
options->permit_tun = -1;
|
|
options->permitted_opens = NULL;
|
|
options->permitted_listens = NULL;
|
|
options->adm_forced_command = NULL;
|
|
options->chroot_directory = NULL;
|
|
options->authorized_keys_command = NULL;
|
|
options->authorized_keys_command_user = NULL;
|
|
options->revoked_keys_file = NULL;
|
|
options->sk_provider = NULL;
|
|
options->trusted_user_ca_keys = NULL;
|
|
options->authorized_principals_file = NULL;
|
|
options->authorized_principals_command = NULL;
|
|
options->authorized_principals_command_user = NULL;
|
|
options->ip_qos_interactive = -1;
|
|
options->ip_qos_bulk = -1;
|
|
options->version_addendum = NULL;
|
|
options->fingerprint_hash = -1;
|
|
options->disable_forwarding = -1;
|
|
options->expose_userauth_info = -1;
|
|
options->required_rsa_size = -1;
|
|
options->channel_timeouts = NULL;
|
|
options->num_channel_timeouts = 0;
|
|
options->unused_connection_timeout = -1;
|
|
options->use_blacklist = -1;
|
|
}
|
|
|
|
/* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
|
|
static int
|
|
option_clear_or_none(const char *o)
|
|
{
|
|
return o == NULL || strcasecmp(o, "none") == 0;
|
|
}
|
|
|
|
static void
|
|
assemble_algorithms(ServerOptions *o)
|
|
{
|
|
char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
|
|
char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
|
|
int r;
|
|
|
|
all_cipher = cipher_alg_list(',', 0);
|
|
all_mac = mac_alg_list(',');
|
|
all_kex = kex_alg_list(',');
|
|
all_key = sshkey_alg_list(0, 0, 1, ',');
|
|
all_sig = sshkey_alg_list(0, 1, 1, ',');
|
|
/* remove unsupported algos from default lists */
|
|
def_cipher = match_filter_allowlist(KEX_SERVER_ENCRYPT, all_cipher);
|
|
def_mac = match_filter_allowlist(KEX_SERVER_MAC, all_mac);
|
|
def_kex = match_filter_allowlist(KEX_SERVER_KEX, all_kex);
|
|
def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
|
|
def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
|
|
#define ASSEMBLE(what, defaults, all) \
|
|
do { \
|
|
if ((r = kex_assemble_names(&o->what, defaults, all)) != 0) \
|
|
fatal_fr(r, "%s", #what); \
|
|
} while (0)
|
|
ASSEMBLE(ciphers, def_cipher, all_cipher);
|
|
ASSEMBLE(macs, def_mac, all_mac);
|
|
ASSEMBLE(kex_algorithms, def_kex, all_kex);
|
|
ASSEMBLE(hostkeyalgorithms, def_key, all_key);
|
|
ASSEMBLE(hostbased_accepted_algos, def_key, all_key);
|
|
ASSEMBLE(pubkey_accepted_algos, def_key, all_key);
|
|
ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
|
|
#undef ASSEMBLE
|
|
free(all_cipher);
|
|
free(all_mac);
|
|
free(all_kex);
|
|
free(all_key);
|
|
free(all_sig);
|
|
free(def_cipher);
|
|
free(def_mac);
|
|
free(def_kex);
|
|
free(def_key);
|
|
free(def_sig);
|
|
}
|
|
|
|
static const char *defaultkey = "[default]";
|
|
|
|
void
|
|
servconf_add_hostkey(const char *file, const int line,
|
|
ServerOptions *options, const char *path, int userprovided)
|
|
{
|
|
char *apath = derelativise_path(path);
|
|
|
|
if (file == defaultkey && access(path, R_OK) != 0)
|
|
return;
|
|
opt_array_append2(file, line, "HostKey",
|
|
&options->host_key_files, &options->host_key_file_userprovided,
|
|
&options->num_host_key_files, apath, userprovided);
|
|
free(apath);
|
|
}
|
|
|
|
void
|
|
servconf_add_hostcert(const char *file, const int line,
|
|
ServerOptions *options, const char *path)
|
|
{
|
|
char *apath = derelativise_path(path);
|
|
|
|
opt_array_append(file, line, "HostCertificate",
|
|
&options->host_cert_files, &options->num_host_cert_files, apath);
|
|
free(apath);
|
|
}
|
|
|
|
void
|
|
fill_default_server_options(ServerOptions *options)
|
|
{
|
|
u_int i;
|
|
|
|
/* Portable-specific options */
|
|
if (options->use_pam == -1)
|
|
options->use_pam = 1;
|
|
|
|
/* Standard Options */
|
|
if (options->num_host_key_files == 0) {
|
|
/* fill default hostkeys for protocols */
|
|
servconf_add_hostkey(defaultkey, 0, options,
|
|
_PATH_HOST_RSA_KEY_FILE, 0);
|
|
#ifdef OPENSSL_HAS_ECC
|
|
servconf_add_hostkey(defaultkey, 0, options,
|
|
_PATH_HOST_ECDSA_KEY_FILE, 0);
|
|
#endif
|
|
servconf_add_hostkey(defaultkey, 0, options,
|
|
_PATH_HOST_ED25519_KEY_FILE, 0);
|
|
#ifdef WITH_XMSS
|
|
servconf_add_hostkey(defaultkey, 0, options,
|
|
_PATH_HOST_XMSS_KEY_FILE, 0);
|
|
#endif /* WITH_XMSS */
|
|
}
|
|
if (options->num_host_key_files == 0)
|
|
fatal("No host key files found");
|
|
/* No certificates by default */
|
|
if (options->num_ports == 0)
|
|
options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
|
|
if (options->address_family == -1)
|
|
options->address_family = AF_UNSPEC;
|
|
if (options->listen_addrs == NULL)
|
|
add_listen_addr(options, NULL, NULL, 0);
|
|
if (options->pid_file == NULL)
|
|
options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
|
|
if (options->moduli_file == NULL)
|
|
options->moduli_file = xstrdup(_PATH_DH_MODULI);
|
|
if (options->login_grace_time == -1)
|
|
options->login_grace_time = 120;
|
|
if (options->permit_root_login == PERMIT_NOT_SET)
|
|
options->permit_root_login = PERMIT_NO;
|
|
if (options->ignore_rhosts == -1)
|
|
options->ignore_rhosts = 1;
|
|
if (options->ignore_user_known_hosts == -1)
|
|
options->ignore_user_known_hosts = 0;
|
|
if (options->print_motd == -1)
|
|
options->print_motd = 1;
|
|
if (options->print_lastlog == -1)
|
|
options->print_lastlog = 1;
|
|
if (options->x11_forwarding == -1)
|
|
options->x11_forwarding = 0;
|
|
if (options->x11_display_offset == -1)
|
|
options->x11_display_offset = 10;
|
|
if (options->x11_use_localhost == -1)
|
|
options->x11_use_localhost = 1;
|
|
if (options->xauth_location == NULL)
|
|
options->xauth_location = xstrdup(_PATH_XAUTH);
|
|
if (options->permit_tty == -1)
|
|
options->permit_tty = 1;
|
|
if (options->permit_user_rc == -1)
|
|
options->permit_user_rc = 1;
|
|
if (options->strict_modes == -1)
|
|
options->strict_modes = 1;
|
|
if (options->tcp_keep_alive == -1)
|
|
options->tcp_keep_alive = 1;
|
|
if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
|
|
options->log_facility = SYSLOG_FACILITY_AUTH;
|
|
if (options->log_level == SYSLOG_LEVEL_NOT_SET)
|
|
options->log_level = SYSLOG_LEVEL_INFO;
|
|
if (options->hostbased_authentication == -1)
|
|
options->hostbased_authentication = 0;
|
|
if (options->hostbased_uses_name_from_packet_only == -1)
|
|
options->hostbased_uses_name_from_packet_only = 0;
|
|
if (options->pubkey_authentication == -1)
|
|
options->pubkey_authentication = 1;
|
|
if (options->pubkey_auth_options == -1)
|
|
options->pubkey_auth_options = 0;
|
|
if (options->kerberos_authentication == -1)
|
|
options->kerberos_authentication = 0;
|
|
if (options->kerberos_or_local_passwd == -1)
|
|
options->kerberos_or_local_passwd = 1;
|
|
if (options->kerberos_ticket_cleanup == -1)
|
|
options->kerberos_ticket_cleanup = 1;
|
|
if (options->kerberos_get_afs_token == -1)
|
|
options->kerberos_get_afs_token = 0;
|
|
if (options->gss_authentication == -1)
|
|
options->gss_authentication = 0;
|
|
if (options->gss_cleanup_creds == -1)
|
|
options->gss_cleanup_creds = 1;
|
|
if (options->gss_strict_acceptor == -1)
|
|
options->gss_strict_acceptor = 1;
|
|
if (options->password_authentication == -1)
|
|
options->password_authentication = 0;
|
|
if (options->kbd_interactive_authentication == -1)
|
|
options->kbd_interactive_authentication = 1;
|
|
if (options->permit_empty_passwd == -1)
|
|
options->permit_empty_passwd = 0;
|
|
if (options->permit_user_env == -1) {
|
|
options->permit_user_env = 0;
|
|
options->permit_user_env_allowlist = NULL;
|
|
}
|
|
if (options->compression == -1)
|
|
#ifdef WITH_ZLIB
|
|
options->compression = COMP_DELAYED;
|
|
#else
|
|
options->compression = COMP_NONE;
|
|
#endif
|
|
|
|
if (options->rekey_limit == -1)
|
|
options->rekey_limit = 0;
|
|
if (options->rekey_interval == -1)
|
|
options->rekey_interval = 0;
|
|
if (options->allow_tcp_forwarding == -1)
|
|
options->allow_tcp_forwarding = FORWARD_ALLOW;
|
|
if (options->allow_streamlocal_forwarding == -1)
|
|
options->allow_streamlocal_forwarding = FORWARD_ALLOW;
|
|
if (options->allow_agent_forwarding == -1)
|
|
options->allow_agent_forwarding = 1;
|
|
if (options->fwd_opts.gateway_ports == -1)
|
|
options->fwd_opts.gateway_ports = 0;
|
|
if (options->max_startups == -1)
|
|
options->max_startups = 100;
|
|
if (options->max_startups_rate == -1)
|
|
options->max_startups_rate = 30; /* 30% */
|
|
if (options->max_startups_begin == -1)
|
|
options->max_startups_begin = 10;
|
|
if (options->per_source_max_startups == -1)
|
|
options->per_source_max_startups = INT_MAX;
|
|
if (options->per_source_masklen_ipv4 == -1)
|
|
options->per_source_masklen_ipv4 = 32;
|
|
if (options->per_source_masklen_ipv6 == -1)
|
|
options->per_source_masklen_ipv6 = 128;
|
|
if (options->max_authtries == -1)
|
|
options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
|
|
if (options->max_sessions == -1)
|
|
options->max_sessions = DEFAULT_SESSIONS_MAX;
|
|
if (options->use_dns == -1)
|
|
options->use_dns = 1;
|
|
if (options->client_alive_interval == -1)
|
|
options->client_alive_interval = 0;
|
|
if (options->client_alive_count_max == -1)
|
|
options->client_alive_count_max = 3;
|
|
if (options->num_authkeys_files == 0) {
|
|
opt_array_append(defaultkey, 0, "AuthorizedKeysFiles",
|
|
&options->authorized_keys_files,
|
|
&options->num_authkeys_files,
|
|
_PATH_SSH_USER_PERMITTED_KEYS);
|
|
opt_array_append(defaultkey, 0, "AuthorizedKeysFiles",
|
|
&options->authorized_keys_files,
|
|
&options->num_authkeys_files,
|
|
_PATH_SSH_USER_PERMITTED_KEYS2);
|
|
}
|
|
if (options->permit_tun == -1)
|
|
options->permit_tun = SSH_TUNMODE_NO;
|
|
if (options->ip_qos_interactive == -1)
|
|
options->ip_qos_interactive = IPTOS_DSCP_AF21;
|
|
if (options->ip_qos_bulk == -1)
|
|
options->ip_qos_bulk = IPTOS_DSCP_CS1;
|
|
if (options->version_addendum == NULL)
|
|
options->version_addendum = xstrdup(SSH_VERSION_FREEBSD);
|
|
if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
|
|
options->fwd_opts.streamlocal_bind_mask = 0177;
|
|
if (options->fwd_opts.streamlocal_bind_unlink == -1)
|
|
options->fwd_opts.streamlocal_bind_unlink = 0;
|
|
if (options->fingerprint_hash == -1)
|
|
options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
|
|
if (options->disable_forwarding == -1)
|
|
options->disable_forwarding = 0;
|
|
if (options->expose_userauth_info == -1)
|
|
options->expose_userauth_info = 0;
|
|
if (options->sk_provider == NULL)
|
|
options->sk_provider = xstrdup("internal");
|
|
if (options->required_rsa_size == -1)
|
|
options->required_rsa_size = SSH_RSA_MINIMUM_MODULUS_SIZE;
|
|
if (options->unused_connection_timeout == -1)
|
|
options->unused_connection_timeout = 0;
|
|
if (options->use_blacklist == -1)
|
|
options->use_blacklist = 0;
|
|
|
|
assemble_algorithms(options);
|
|
|
|
/* Turn privilege separation and sandboxing on by default */
|
|
if (use_privsep == -1)
|
|
use_privsep = PRIVSEP_ON;
|
|
|
|
#define CLEAR_ON_NONE(v) \
|
|
do { \
|
|
if (option_clear_or_none(v)) { \
|
|
free(v); \
|
|
v = NULL; \
|
|
} \
|
|
} while(0)
|
|
#define CLEAR_ON_NONE_ARRAY(v, nv, none) \
|
|
do { \
|
|
if (options->nv == 1 && \
|
|
strcasecmp(options->v[0], none) == 0) { \
|
|
free(options->v[0]); \
|
|
free(options->v); \
|
|
options->v = NULL; \
|
|
options->nv = 0; \
|
|
} \
|
|
} while (0)
|
|
CLEAR_ON_NONE(options->pid_file);
|
|
CLEAR_ON_NONE(options->xauth_location);
|
|
CLEAR_ON_NONE(options->banner);
|
|
CLEAR_ON_NONE(options->trusted_user_ca_keys);
|
|
CLEAR_ON_NONE(options->revoked_keys_file);
|
|
CLEAR_ON_NONE(options->sk_provider);
|
|
CLEAR_ON_NONE(options->authorized_principals_file);
|
|
CLEAR_ON_NONE(options->adm_forced_command);
|
|
CLEAR_ON_NONE(options->chroot_directory);
|
|
CLEAR_ON_NONE(options->routing_domain);
|
|
CLEAR_ON_NONE(options->host_key_agent);
|
|
|
|
for (i = 0; i < options->num_host_key_files; i++)
|
|
CLEAR_ON_NONE(options->host_key_files[i]);
|
|
for (i = 0; i < options->num_host_cert_files; i++)
|
|
CLEAR_ON_NONE(options->host_cert_files[i]);
|
|
|
|
CLEAR_ON_NONE_ARRAY(channel_timeouts, num_channel_timeouts, "none");
|
|
CLEAR_ON_NONE_ARRAY(auth_methods, num_auth_methods, "any");
|
|
#undef CLEAR_ON_NONE
|
|
#undef CLEAR_ON_NONE_ARRAY
|
|
}
|
|
|
|
/* Keyword tokens. */
|
|
typedef enum {
|
|
sBadOption, /* == unknown option */
|
|
/* Portable-specific options */
|
|
sUsePAM,
|
|
/* Standard Options */
|
|
sPort, sHostKeyFile, sLoginGraceTime,
|
|
sPermitRootLogin, sLogFacility, sLogLevel, sLogVerbose,
|
|
sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
|
|
sKerberosGetAFSToken, sPasswordAuthentication,
|
|
sKbdInteractiveAuthentication, sListenAddress, sAddressFamily,
|
|
sPrintMotd, sPrintLastLog, sIgnoreRhosts,
|
|
sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
|
|
sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
|
|
sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
|
|
sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
|
|
sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile, sModuliFile,
|
|
sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedAlgorithms,
|
|
sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
|
|
sBanner, sUseDNS, sHostbasedAuthentication,
|
|
sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedAlgorithms,
|
|
sHostKeyAlgorithms, sPerSourceMaxStartups, sPerSourceNetBlockSize,
|
|
sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
|
|
sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
|
|
sAcceptEnv, sSetEnv, sPermitTunnel,
|
|
sMatch, sPermitOpen, sPermitListen, sForceCommand, sChrootDirectory,
|
|
sUsePrivilegeSeparation, sAllowAgentForwarding,
|
|
sHostCertificate, sInclude,
|
|
sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
|
|
sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
|
|
sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
|
|
sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
|
|
sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
|
|
sStreamLocalBindMask, sStreamLocalBindUnlink,
|
|
sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
|
|
sExposeAuthInfo, sRDomain, sPubkeyAuthOptions, sSecurityKeyProvider,
|
|
sRequiredRSASize, sChannelTimeout, sUnusedConnectionTimeout,
|
|
sUseBlacklist,
|
|
sDeprecated, sIgnore, sUnsupported
|
|
} ServerOpCodes;
|
|
|
|
#define SSHCFG_GLOBAL 0x01 /* allowed in main section of config */
|
|
#define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
|
|
#define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
|
|
#define SSHCFG_NEVERMATCH 0x04 /* Match never matches; internal only */
|
|
#define SSHCFG_MATCH_ONLY 0x08 /* Match only in conditional blocks; internal only */
|
|
|
|
/* Textual representation of the tokens. */
|
|
static struct {
|
|
const char *name;
|
|
ServerOpCodes opcode;
|
|
u_int flags;
|
|
} keywords[] = {
|
|
/* Portable-specific options */
|
|
#ifdef USE_PAM
|
|
{ "usepam", sUsePAM, SSHCFG_GLOBAL },
|
|
#else
|
|
{ "usepam", sUnsupported, SSHCFG_GLOBAL },
|
|
#endif
|
|
{ "pamauthenticationviakbdint", sDeprecated, SSHCFG_GLOBAL },
|
|
/* Standard Options */
|
|
{ "port", sPort, SSHCFG_GLOBAL },
|
|
{ "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
|
|
{ "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
|
|
{ "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
|
|
{ "pidfile", sPidFile, SSHCFG_GLOBAL },
|
|
{ "modulifile", sModuliFile, SSHCFG_GLOBAL },
|
|
{ "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
|
|
{ "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
|
|
{ "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
|
|
{ "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
|
|
{ "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
|
|
{ "loglevel", sLogLevel, SSHCFG_ALL },
|
|
{ "logverbose", sLogVerbose, SSHCFG_ALL },
|
|
{ "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
|
|
{ "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
|
|
{ "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
|
|
{ "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
|
|
{ "hostbasedacceptedalgorithms", sHostbasedAcceptedAlgorithms, SSHCFG_ALL },
|
|
{ "hostbasedacceptedkeytypes", sHostbasedAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
|
|
{ "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
|
|
{ "rsaauthentication", sDeprecated, SSHCFG_ALL },
|
|
{ "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
|
|
{ "pubkeyacceptedalgorithms", sPubkeyAcceptedAlgorithms, SSHCFG_ALL },
|
|
{ "pubkeyacceptedkeytypes", sPubkeyAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
|
|
{ "pubkeyauthoptions", sPubkeyAuthOptions, SSHCFG_ALL },
|
|
{ "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
|
|
#ifdef KRB5
|
|
{ "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
|
|
{ "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
|
|
{ "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
|
|
#ifdef USE_AFS
|
|
{ "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
|
|
#else
|
|
{ "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
|
|
#endif
|
|
#else
|
|
{ "kerberosauthentication", sUnsupported, SSHCFG_ALL },
|
|
{ "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
|
|
{ "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
|
|
{ "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
|
|
#endif
|
|
{ "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
|
|
{ "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
|
|
#ifdef GSSAPI
|
|
{ "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
|
|
{ "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
|
|
{ "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
|
|
#else
|
|
{ "gssapiauthentication", sUnsupported, SSHCFG_ALL },
|
|
{ "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
|
|
{ "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
|
|
#endif
|
|
{ "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
|
|
{ "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
|
|
{ "challengeresponseauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
|
|
{ "skeyauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
|
|
{ "checkmail", sDeprecated, SSHCFG_GLOBAL },
|
|
{ "listenaddress", sListenAddress, SSHCFG_GLOBAL },
|
|
{ "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
|
|
{ "printmotd", sPrintMotd, SSHCFG_GLOBAL },
|
|
#ifdef DISABLE_LASTLOG
|
|
{ "printlastlog", sUnsupported, SSHCFG_GLOBAL },
|
|
#else
|
|
{ "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
|
|
#endif
|
|
{ "ignorerhosts", sIgnoreRhosts, SSHCFG_ALL },
|
|
{ "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
|
|
{ "x11forwarding", sX11Forwarding, SSHCFG_ALL },
|
|
{ "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
|
|
{ "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
|
|
{ "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
|
|
{ "strictmodes", sStrictModes, SSHCFG_GLOBAL },
|
|
{ "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
|
|
{ "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
|
|
{ "uselogin", sDeprecated, SSHCFG_GLOBAL },
|
|
{ "compression", sCompression, SSHCFG_GLOBAL },
|
|
{ "rekeylimit", sRekeyLimit, SSHCFG_ALL },
|
|
{ "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
|
|
{ "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
|
|
{ "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
|
|
{ "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
|
|
{ "allowusers", sAllowUsers, SSHCFG_ALL },
|
|
{ "denyusers", sDenyUsers, SSHCFG_ALL },
|
|
{ "allowgroups", sAllowGroups, SSHCFG_ALL },
|
|
{ "denygroups", sDenyGroups, SSHCFG_ALL },
|
|
{ "ciphers", sCiphers, SSHCFG_GLOBAL },
|
|
{ "macs", sMacs, SSHCFG_GLOBAL },
|
|
{ "protocol", sIgnore, SSHCFG_GLOBAL },
|
|
{ "gatewayports", sGatewayPorts, SSHCFG_ALL },
|
|
{ "subsystem", sSubsystem, SSHCFG_GLOBAL },
|
|
{ "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
|
|
{ "persourcemaxstartups", sPerSourceMaxStartups, SSHCFG_GLOBAL },
|
|
{ "persourcenetblocksize", sPerSourceNetBlockSize, SSHCFG_GLOBAL },
|
|
{ "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
|
|
{ "maxsessions", sMaxSessions, SSHCFG_ALL },
|
|
{ "banner", sBanner, SSHCFG_ALL },
|
|
{ "usedns", sUseDNS, SSHCFG_GLOBAL },
|
|
{ "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
|
|
{ "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
|
|
{ "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
|
|
{ "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
|
|
{ "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
|
|
{ "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
|
|
{ "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
|
|
{ "acceptenv", sAcceptEnv, SSHCFG_ALL },
|
|
{ "setenv", sSetEnv, SSHCFG_ALL },
|
|
{ "permittunnel", sPermitTunnel, SSHCFG_ALL },
|
|
{ "permittty", sPermitTTY, SSHCFG_ALL },
|
|
{ "permituserrc", sPermitUserRC, SSHCFG_ALL },
|
|
{ "match", sMatch, SSHCFG_ALL },
|
|
{ "permitopen", sPermitOpen, SSHCFG_ALL },
|
|
{ "permitlisten", sPermitListen, SSHCFG_ALL },
|
|
{ "forcecommand", sForceCommand, SSHCFG_ALL },
|
|
{ "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
|
|
{ "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
|
|
{ "revokedkeys", sRevokedKeys, SSHCFG_ALL },
|
|
{ "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
|
|
{ "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
|
|
{ "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
|
|
{ "include", sInclude, SSHCFG_ALL },
|
|
{ "ipqos", sIPQoS, SSHCFG_ALL },
|
|
{ "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
|
|
{ "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
|
|
{ "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
|
|
{ "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
|
|
{ "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
|
|
{ "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
|
|
{ "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
|
|
{ "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
|
|
{ "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
|
|
{ "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
|
|
{ "disableforwarding", sDisableForwarding, SSHCFG_ALL },
|
|
{ "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
|
|
{ "rdomain", sRDomain, SSHCFG_ALL },
|
|
{ "casignaturealgorithms", sCASignatureAlgorithms, SSHCFG_ALL },
|
|
{ "securitykeyprovider", sSecurityKeyProvider, SSHCFG_GLOBAL },
|
|
{ "requiredrsasize", sRequiredRSASize, SSHCFG_ALL },
|
|
{ "channeltimeout", sChannelTimeout, SSHCFG_ALL },
|
|
{ "unusedconnectiontimeout", sUnusedConnectionTimeout, SSHCFG_ALL },
|
|
{ "useblacklist", sUseBlacklist, SSHCFG_GLOBAL },
|
|
{ "useblocklist", sUseBlacklist, SSHCFG_GLOBAL }, /* alias */
|
|
{ "noneenabled", sUnsupported, SSHCFG_ALL },
|
|
{ "hpndisabled", sDeprecated, SSHCFG_ALL },
|
|
{ "hpnbuffersize", sDeprecated, SSHCFG_ALL },
|
|
{ "tcprcvbufpoll", sDeprecated, SSHCFG_ALL },
|
|
{ NULL, sBadOption, 0 }
|
|
};
|
|
|
|
static struct {
|
|
int val;
|
|
char *text;
|
|
} tunmode_desc[] = {
|
|
{ SSH_TUNMODE_NO, "no" },
|
|
{ SSH_TUNMODE_POINTOPOINT, "point-to-point" },
|
|
{ SSH_TUNMODE_ETHERNET, "ethernet" },
|
|
{ SSH_TUNMODE_YES, "yes" },
|
|
{ -1, NULL }
|
|
};
|
|
|
|
/* Returns an opcode name from its number */
|
|
|
|
static const char *
|
|
lookup_opcode_name(ServerOpCodes code)
|
|
{
|
|
u_int i;
|
|
|
|
for (i = 0; keywords[i].name != NULL; i++)
|
|
if (keywords[i].opcode == code)
|
|
return(keywords[i].name);
|
|
return "UNKNOWN";
|
|
}
|
|
|
|
|
|
/*
|
|
* Returns the number of the token pointed to by cp or sBadOption.
|
|
*/
|
|
|
|
static ServerOpCodes
|
|
parse_token(const char *cp, const char *filename,
|
|
int linenum, u_int *flags)
|
|
{
|
|
u_int i;
|
|
|
|
for (i = 0; keywords[i].name; i++)
|
|
if (strcasecmp(cp, keywords[i].name) == 0) {
|
|
*flags = keywords[i].flags;
|
|
return keywords[i].opcode;
|
|
}
|
|
|
|
error("%s: line %d: Bad configuration option: %s",
|
|
filename, linenum, cp);
|
|
return sBadOption;
|
|
}
|
|
|
|
char *
|
|
derelativise_path(const char *path)
|
|
{
|
|
char *expanded, *ret, cwd[PATH_MAX];
|
|
|
|
if (strcasecmp(path, "none") == 0)
|
|
return xstrdup("none");
|
|
expanded = tilde_expand_filename(path, getuid());
|
|
if (path_absolute(expanded))
|
|
return expanded;
|
|
if (getcwd(cwd, sizeof(cwd)) == NULL)
|
|
fatal_f("getcwd: %s", strerror(errno));
|
|
xasprintf(&ret, "%s/%s", cwd, expanded);
|
|
free(expanded);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
add_listen_addr(ServerOptions *options, const char *addr,
|
|
const char *rdomain, int port)
|
|
{
|
|
u_int i;
|
|
|
|
if (port > 0)
|
|
add_one_listen_addr(options, addr, rdomain, port);
|
|
else {
|
|
for (i = 0; i < options->num_ports; i++) {
|
|
add_one_listen_addr(options, addr, rdomain,
|
|
options->ports[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
add_one_listen_addr(ServerOptions *options, const char *addr,
|
|
const char *rdomain, int port)
|
|
{
|
|
struct addrinfo hints, *ai, *aitop;
|
|
char strport[NI_MAXSERV];
|
|
int gaierr;
|
|
u_int i;
|
|
|
|
/* Find listen_addrs entry for this rdomain */
|
|
for (i = 0; i < options->num_listen_addrs; i++) {
|
|
if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
|
|
break;
|
|
if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
|
|
continue;
|
|
if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
|
|
break;
|
|
}
|
|
if (i >= options->num_listen_addrs) {
|
|
/* No entry for this rdomain; allocate one */
|
|
if (i >= INT_MAX)
|
|
fatal_f("too many listen addresses");
|
|
options->listen_addrs = xrecallocarray(options->listen_addrs,
|
|
options->num_listen_addrs, options->num_listen_addrs + 1,
|
|
sizeof(*options->listen_addrs));
|
|
i = options->num_listen_addrs++;
|
|
if (rdomain != NULL)
|
|
options->listen_addrs[i].rdomain = xstrdup(rdomain);
|
|
}
|
|
/* options->listen_addrs[i] points to the addresses for this rdomain */
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = options->address_family;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
|
|
snprintf(strport, sizeof strport, "%d", port);
|
|
if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
|
|
fatal("bad addr or host: %s (%s)",
|
|
addr ? addr : "<NULL>",
|
|
ssh_gai_strerror(gaierr));
|
|
for (ai = aitop; ai->ai_next; ai = ai->ai_next)
|
|
;
|
|
ai->ai_next = options->listen_addrs[i].addrs;
|
|
options->listen_addrs[i].addrs = aitop;
|
|
}
|
|
|
|
/* Returns nonzero if the routing domain name is valid */
|
|
static int
|
|
valid_rdomain(const char *name)
|
|
{
|
|
#if defined(HAVE_SYS_VALID_RDOMAIN)
|
|
return sys_valid_rdomain(name);
|
|
#elif defined(__OpenBSD__)
|
|
const char *errstr;
|
|
long long num;
|
|
struct rt_tableinfo info;
|
|
int mib[6];
|
|
size_t miblen = sizeof(mib);
|
|
|
|
if (name == NULL)
|
|
return 1;
|
|
|
|
num = strtonum(name, 0, 255, &errstr);
|
|
if (errstr != NULL)
|
|
return 0;
|
|
|
|
/* Check whether the table actually exists */
|
|
memset(mib, 0, sizeof(mib));
|
|
mib[0] = CTL_NET;
|
|
mib[1] = PF_ROUTE;
|
|
mib[4] = NET_RT_TABLE;
|
|
mib[5] = (int)num;
|
|
if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
|
|
return 0;
|
|
|
|
return 1;
|
|
#else /* defined(__OpenBSD__) */
|
|
error("Routing domains are not supported on this platform");
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Queue a ListenAddress to be processed once we have all of the Ports
|
|
* and AddressFamily options.
|
|
*/
|
|
static void
|
|
queue_listen_addr(ServerOptions *options, const char *addr,
|
|
const char *rdomain, int port)
|
|
{
|
|
struct queued_listenaddr *qla;
|
|
|
|
options->queued_listen_addrs = xrecallocarray(
|
|
options->queued_listen_addrs,
|
|
options->num_queued_listens, options->num_queued_listens + 1,
|
|
sizeof(*options->queued_listen_addrs));
|
|
qla = &options->queued_listen_addrs[options->num_queued_listens++];
|
|
qla->addr = xstrdup(addr);
|
|
qla->port = port;
|
|
qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
|
|
}
|
|
|
|
/*
|
|
* Process queued (text) ListenAddress entries.
|
|
*/
|
|
static void
|
|
process_queued_listen_addrs(ServerOptions *options)
|
|
{
|
|
u_int i;
|
|
struct queued_listenaddr *qla;
|
|
|
|
if (options->num_ports == 0)
|
|
options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
|
|
if (options->address_family == -1)
|
|
options->address_family = AF_UNSPEC;
|
|
|
|
for (i = 0; i < options->num_queued_listens; i++) {
|
|
qla = &options->queued_listen_addrs[i];
|
|
add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
|
|
free(qla->addr);
|
|
free(qla->rdomain);
|
|
}
|
|
free(options->queued_listen_addrs);
|
|
options->queued_listen_addrs = NULL;
|
|
options->num_queued_listens = 0;
|
|
}
|
|
|
|
/*
|
|
* Inform channels layer of permitopen options for a single forwarding
|
|
* direction (local/remote).
|
|
*/
|
|
static void
|
|
process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode,
|
|
char **opens, u_int num_opens)
|
|
{
|
|
u_int i;
|
|
int port;
|
|
char *host, *arg, *oarg;
|
|
int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE;
|
|
const char *what = lookup_opcode_name(opcode);
|
|
|
|
channel_clear_permission(ssh, FORWARD_ADM, where);
|
|
if (num_opens == 0)
|
|
return; /* permit any */
|
|
|
|
/* handle keywords: "any" / "none" */
|
|
if (num_opens == 1 && strcmp(opens[0], "any") == 0)
|
|
return;
|
|
if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
|
|
channel_disable_admin(ssh, where);
|
|
return;
|
|
}
|
|
/* Otherwise treat it as a list of permitted host:port */
|
|
for (i = 0; i < num_opens; i++) {
|
|
oarg = arg = xstrdup(opens[i]);
|
|
host = hpdelim(&arg);
|
|
if (host == NULL)
|
|
fatal_f("missing host in %s", what);
|
|
host = cleanhostname(host);
|
|
if (arg == NULL || ((port = permitopen_port(arg)) < 0))
|
|
fatal_f("bad port number in %s", what);
|
|
/* Send it to channels layer */
|
|
channel_add_permission(ssh, FORWARD_ADM,
|
|
where, host, port);
|
|
free(oarg);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Inform channels layer of permitopen options from configuration.
|
|
*/
|
|
void
|
|
process_permitopen(struct ssh *ssh, ServerOptions *options)
|
|
{
|
|
process_permitopen_list(ssh, sPermitOpen,
|
|
options->permitted_opens, options->num_permitted_opens);
|
|
process_permitopen_list(ssh, sPermitListen,
|
|
options->permitted_listens,
|
|
options->num_permitted_listens);
|
|
}
|
|
|
|
/* Parse a ChannelTimeout clause "pattern=interval" */
|
|
static int
|
|
parse_timeout(const char *s, char **typep, u_int *secsp)
|
|
{
|
|
char *cp, *sdup;
|
|
int secs;
|
|
|
|
if (typep != NULL)
|
|
*typep = NULL;
|
|
if (secsp != NULL)
|
|
*secsp = 0;
|
|
if (s == NULL)
|
|
return -1;
|
|
sdup = xstrdup(s);
|
|
|
|
if ((cp = strchr(sdup, '=')) == NULL || cp == sdup) {
|
|
free(sdup);
|
|
return -1;
|
|
}
|
|
*cp++ = '\0';
|
|
if ((secs = convtime(cp)) < 0) {
|
|
free(sdup);
|
|
return -1;
|
|
}
|
|
/* success */
|
|
if (typep != NULL)
|
|
*typep = xstrdup(sdup);
|
|
if (secsp != NULL)
|
|
*secsp = (u_int)secs;
|
|
free(sdup);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
process_channel_timeouts(struct ssh *ssh, ServerOptions *options)
|
|
{
|
|
u_int i, secs;
|
|
char *type;
|
|
|
|
debug3_f("setting %u timeouts", options->num_channel_timeouts);
|
|
channel_clear_timeouts(ssh);
|
|
for (i = 0; i < options->num_channel_timeouts; i++) {
|
|
if (parse_timeout(options->channel_timeouts[i],
|
|
&type, &secs) != 0) {
|
|
fatal_f("internal error: bad timeout %s",
|
|
options->channel_timeouts[i]);
|
|
}
|
|
channel_add_timeout(ssh, type, secs);
|
|
free(type);
|
|
}
|
|
}
|
|
|
|
struct connection_info *
|
|
get_connection_info(struct ssh *ssh, int populate, int use_dns)
|
|
{
|
|
static struct connection_info ci;
|
|
|
|
if (ssh == NULL || !populate)
|
|
return &ci;
|
|
ci.host = auth_get_canonical_hostname(ssh, use_dns);
|
|
ci.address = ssh_remote_ipaddr(ssh);
|
|
ci.laddress = ssh_local_ipaddr(ssh);
|
|
ci.lport = ssh_local_port(ssh);
|
|
ci.rdomain = ssh_packet_rdomain_in(ssh);
|
|
return &ci;
|
|
}
|
|
|
|
/*
|
|
* The strategy for the Match blocks is that the config file is parsed twice.
|
|
*
|
|
* The first time is at startup. activep is initialized to 1 and the
|
|
* directives in the global context are processed and acted on. Hitting a
|
|
* Match directive unsets activep and the directives inside the block are
|
|
* checked for syntax only.
|
|
*
|
|
* The second time is after a connection has been established but before
|
|
* authentication. activep is initialized to 2 and global config directives
|
|
* are ignored since they have already been processed. If the criteria in a
|
|
* Match block is met, activep is set and the subsequent directives
|
|
* processed and actioned until EOF or another Match block unsets it. Any
|
|
* options set are copied into the main server config.
|
|
*
|
|
* Potential additions/improvements:
|
|
* - Add Match support for pre-kex directives, eg. Ciphers.
|
|
*
|
|
* - Add a Tag directive (idea from David Leonard) ala pf, eg:
|
|
* Match Address 192.168.0.*
|
|
* Tag trusted
|
|
* Match Group wheel
|
|
* Tag trusted
|
|
* Match Tag trusted
|
|
* AllowTcpForwarding yes
|
|
* GatewayPorts clientspecified
|
|
* [...]
|
|
*
|
|
* - Add a PermittedChannelRequests directive
|
|
* Match Group shell
|
|
* PermittedChannelRequests session,forwarded-tcpip
|
|
*/
|
|
|
|
static int
|
|
match_cfg_line_group(const char *grps, int line, const char *user)
|
|
{
|
|
int result = 0;
|
|
struct passwd *pw;
|
|
|
|
if (user == NULL)
|
|
goto out;
|
|
|
|
if ((pw = getpwnam(user)) == NULL) {
|
|
debug("Can't match group at line %d because user %.100s does "
|
|
"not exist", line, user);
|
|
} else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
|
|
debug("Can't Match group because user %.100s not in any group "
|
|
"at line %d", user, line);
|
|
} else if (ga_match_pattern_list(grps) != 1) {
|
|
debug("user %.100s does not match group list %.100s at line %d",
|
|
user, grps, line);
|
|
} else {
|
|
debug("user %.100s matched group list %.100s at line %d", user,
|
|
grps, line);
|
|
result = 1;
|
|
}
|
|
out:
|
|
ga_free();
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
match_test_missing_fatal(const char *criteria, const char *attrib)
|
|
{
|
|
fatal("'Match %s' in configuration but '%s' not in connection "
|
|
"test specification.", criteria, attrib);
|
|
}
|
|
|
|
/*
|
|
* All of the attributes on a single Match line are ANDed together, so we need
|
|
* to check every attribute and set the result to zero if any attribute does
|
|
* not match.
|
|
*/
|
|
static int
|
|
match_cfg_line(char **condition, int line, struct connection_info *ci)
|
|
{
|
|
int result = 1, attributes = 0, port;
|
|
char *arg, *attrib, *cp = *condition;
|
|
|
|
if (ci == NULL)
|
|
debug3("checking syntax for 'Match %s'", cp);
|
|
else
|
|
debug3("checking match for '%s' user %s host %s addr %s "
|
|
"laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
|
|
ci->host ? ci->host : "(null)",
|
|
ci->address ? ci->address : "(null)",
|
|
ci->laddress ? ci->laddress : "(null)", ci->lport);
|
|
|
|
while ((attrib = strdelim(&cp)) && *attrib != '\0') {
|
|
/* Terminate on comment */
|
|
if (*attrib == '#') {
|
|
cp = NULL; /* mark all arguments consumed */
|
|
break;
|
|
}
|
|
arg = NULL;
|
|
attributes++;
|
|
/* Criterion "all" has no argument and must appear alone */
|
|
if (strcasecmp(attrib, "all") == 0) {
|
|
if (attributes > 1 || ((arg = strdelim(&cp)) != NULL &&
|
|
*arg != '\0' && *arg != '#')) {
|
|
error("'all' cannot be combined with other "
|
|
"Match attributes");
|
|
return -1;
|
|
}
|
|
if (arg != NULL && *arg == '#')
|
|
cp = NULL; /* mark all arguments consumed */
|
|
*condition = cp;
|
|
return 1;
|
|
}
|
|
/* All other criteria require an argument */
|
|
if ((arg = strdelim(&cp)) == NULL ||
|
|
*arg == '\0' || *arg == '#') {
|
|
error("Missing Match criteria for %s", attrib);
|
|
return -1;
|
|
}
|
|
if (strcasecmp(attrib, "user") == 0) {
|
|
if (ci == NULL || (ci->test && ci->user == NULL)) {
|
|
result = 0;
|
|
continue;
|
|
}
|
|
if (ci->user == NULL)
|
|
match_test_missing_fatal("User", "user");
|
|
if (match_usergroup_pattern_list(ci->user, arg) != 1)
|
|
result = 0;
|
|
else
|
|
debug("user %.100s matched 'User %.100s' at "
|
|
"line %d", ci->user, arg, line);
|
|
} else if (strcasecmp(attrib, "group") == 0) {
|
|
if (ci == NULL || (ci->test && ci->user == NULL)) {
|
|
result = 0;
|
|
continue;
|
|
}
|
|
if (ci->user == NULL)
|
|
match_test_missing_fatal("Group", "user");
|
|
switch (match_cfg_line_group(arg, line, ci->user)) {
|
|
case -1:
|
|
return -1;
|
|
case 0:
|
|
result = 0;
|
|
}
|
|
} else if (strcasecmp(attrib, "host") == 0) {
|
|
if (ci == NULL || (ci->test && ci->host == NULL)) {
|
|
result = 0;
|
|
continue;
|
|
}
|
|
if (ci->host == NULL)
|
|
match_test_missing_fatal("Host", "host");
|
|
if (match_hostname(ci->host, arg) != 1)
|
|
result = 0;
|
|
else
|
|
debug("connection from %.100s matched 'Host "
|
|
"%.100s' at line %d", ci->host, arg, line);
|
|
} else if (strcasecmp(attrib, "address") == 0) {
|
|
if (ci == NULL || (ci->test && ci->address == NULL)) {
|
|
if (addr_match_list(NULL, arg) != 0)
|
|
fatal("Invalid Match address argument "
|
|
"'%s' at line %d", arg, line);
|
|
result = 0;
|
|
continue;
|
|
}
|
|
if (ci->address == NULL)
|
|
match_test_missing_fatal("Address", "addr");
|
|
switch (addr_match_list(ci->address, arg)) {
|
|
case 1:
|
|
debug("connection from %.100s matched 'Address "
|
|
"%.100s' at line %d", ci->address, arg, line);
|
|
break;
|
|
case 0:
|
|
case -1:
|
|
result = 0;
|
|
break;
|
|
case -2:
|
|
return -1;
|
|
}
|
|
} else if (strcasecmp(attrib, "localaddress") == 0){
|
|
if (ci == NULL || (ci->test && ci->laddress == NULL)) {
|
|
if (addr_match_list(NULL, arg) != 0)
|
|
fatal("Invalid Match localaddress "
|
|
"argument '%s' at line %d", arg,
|
|
line);
|
|
result = 0;
|
|
continue;
|
|
}
|
|
if (ci->laddress == NULL)
|
|
match_test_missing_fatal("LocalAddress",
|
|
"laddr");
|
|
switch (addr_match_list(ci->laddress, arg)) {
|
|
case 1:
|
|
debug("connection from %.100s matched "
|
|
"'LocalAddress %.100s' at line %d",
|
|
ci->laddress, arg, line);
|
|
break;
|
|
case 0:
|
|
case -1:
|
|
result = 0;
|
|
break;
|
|
case -2:
|
|
return -1;
|
|
}
|
|
} else if (strcasecmp(attrib, "localport") == 0) {
|
|
if ((port = a2port(arg)) == -1) {
|
|
error("Invalid LocalPort '%s' on Match line",
|
|
arg);
|
|
return -1;
|
|
}
|
|
if (ci == NULL || (ci->test && ci->lport == -1)) {
|
|
result = 0;
|
|
continue;
|
|
}
|
|
if (ci->lport == 0)
|
|
match_test_missing_fatal("LocalPort", "lport");
|
|
/* TODO support port lists */
|
|
if (port == ci->lport)
|
|
debug("connection from %.100s matched "
|
|
"'LocalPort %d' at line %d",
|
|
ci->laddress, port, line);
|
|
else
|
|
result = 0;
|
|
} else if (strcasecmp(attrib, "rdomain") == 0) {
|
|
if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
|
|
result = 0;
|
|
continue;
|
|
}
|
|
if (ci->rdomain == NULL)
|
|
match_test_missing_fatal("RDomain", "rdomain");
|
|
if (match_pattern_list(ci->rdomain, arg, 0) != 1)
|
|
result = 0;
|
|
else
|
|
debug("user %.100s matched 'RDomain %.100s' at "
|
|
"line %d", ci->rdomain, arg, line);
|
|
} else {
|
|
error("Unsupported Match attribute %s", attrib);
|
|
return -1;
|
|
}
|
|
}
|
|
if (attributes == 0) {
|
|
error("One or more attributes required for Match");
|
|
return -1;
|
|
}
|
|
if (ci != NULL)
|
|
debug3("match %sfound", result ? "" : "not ");
|
|
*condition = cp;
|
|
return result;
|
|
}
|
|
|
|
#define WHITESPACE " \t\r\n"
|
|
|
|
/* Multistate option parsing */
|
|
struct multistate {
|
|
char *key;
|
|
int value;
|
|
};
|
|
static const struct multistate multistate_flag[] = {
|
|
{ "yes", 1 },
|
|
{ "no", 0 },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_ignore_rhosts[] = {
|
|
{ "yes", IGNORE_RHOSTS_YES },
|
|
{ "no", IGNORE_RHOSTS_NO },
|
|
{ "shosts-only", IGNORE_RHOSTS_SHOSTS },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_addressfamily[] = {
|
|
{ "inet", AF_INET },
|
|
{ "inet6", AF_INET6 },
|
|
{ "any", AF_UNSPEC },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_permitrootlogin[] = {
|
|
{ "without-password", PERMIT_NO_PASSWD },
|
|
{ "prohibit-password", PERMIT_NO_PASSWD },
|
|
{ "forced-commands-only", PERMIT_FORCED_ONLY },
|
|
{ "yes", PERMIT_YES },
|
|
{ "no", PERMIT_NO },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_compression[] = {
|
|
#ifdef WITH_ZLIB
|
|
{ "yes", COMP_DELAYED },
|
|
{ "delayed", COMP_DELAYED },
|
|
#endif
|
|
{ "no", COMP_NONE },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_gatewayports[] = {
|
|
{ "clientspecified", 2 },
|
|
{ "yes", 1 },
|
|
{ "no", 0 },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_tcpfwd[] = {
|
|
{ "yes", FORWARD_ALLOW },
|
|
{ "all", FORWARD_ALLOW },
|
|
{ "no", FORWARD_DENY },
|
|
{ "remote", FORWARD_REMOTE },
|
|
{ "local", FORWARD_LOCAL },
|
|
{ NULL, -1 }
|
|
};
|
|
|
|
static int
|
|
process_server_config_line_depth(ServerOptions *options, char *line,
|
|
const char *filename, int linenum, int *activep,
|
|
struct connection_info *connectinfo, int *inc_flags, int depth,
|
|
struct include_list *includes)
|
|
{
|
|
char *str, ***chararrayptr, **charptr, *arg, *arg2, *p, *keyword;
|
|
int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found;
|
|
SyslogFacility *log_facility_ptr;
|
|
LogLevel *log_level_ptr;
|
|
ServerOpCodes opcode;
|
|
u_int i, *uintptr, uvalue, flags = 0;
|
|
size_t len;
|
|
long long val64;
|
|
const struct multistate *multistate_ptr;
|
|
const char *errstr;
|
|
struct include_item *item;
|
|
glob_t gbuf;
|
|
char **oav = NULL, **av;
|
|
int oac = 0, ac;
|
|
int ret = -1;
|
|
|
|
/* Strip trailing whitespace. Allow \f (form feed) at EOL only */
|
|
if ((len = strlen(line)) == 0)
|
|
return 0;
|
|
for (len--; len > 0; len--) {
|
|
if (strchr(WHITESPACE "\f", line[len]) == NULL)
|
|
break;
|
|
line[len] = '\0';
|
|
}
|
|
|
|
str = line;
|
|
if ((keyword = strdelim(&str)) == NULL)
|
|
return 0;
|
|
/* Ignore leading whitespace */
|
|
if (*keyword == '\0')
|
|
keyword = strdelim(&str);
|
|
if (!keyword || !*keyword || *keyword == '#')
|
|
return 0;
|
|
if (str == NULL || *str == '\0') {
|
|
error("%s line %d: no argument after keyword \"%s\"",
|
|
filename, linenum, keyword);
|
|
return -1;
|
|
}
|
|
intptr = NULL;
|
|
charptr = NULL;
|
|
opcode = parse_token(keyword, filename, linenum, &flags);
|
|
|
|
if (argv_split(str, &oac, &oav, 1) != 0) {
|
|
error("%s line %d: invalid quotes", filename, linenum);
|
|
return -1;
|
|
}
|
|
ac = oac;
|
|
av = oav;
|
|
|
|
if (activep == NULL) { /* We are processing a command line directive */
|
|
cmdline = 1;
|
|
activep = &cmdline;
|
|
}
|
|
if (*activep && opcode != sMatch && opcode != sInclude)
|
|
debug3("%s:%d setting %s %s", filename, linenum, keyword, str);
|
|
if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
|
|
if (connectinfo == NULL) {
|
|
fatal("%s line %d: Directive '%s' is not allowed "
|
|
"within a Match block", filename, linenum, keyword);
|
|
} else { /* this is a directive we have already processed */
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
switch (opcode) {
|
|
/* Portable-specific options */
|
|
case sUsePAM:
|
|
intptr = &options->use_pam;
|
|
goto parse_flag;
|
|
|
|
/* Standard Options */
|
|
case sBadOption:
|
|
goto out;
|
|
case sPort:
|
|
/* ignore ports from configfile if cmdline specifies ports */
|
|
if (options->ports_from_cmdline) {
|
|
argv_consume(&ac);
|
|
break;
|
|
}
|
|
if (options->num_ports >= MAX_PORTS)
|
|
fatal("%s line %d: too many ports.",
|
|
filename, linenum);
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: missing port number.",
|
|
filename, linenum);
|
|
options->ports[options->num_ports++] = a2port(arg);
|
|
if (options->ports[options->num_ports-1] <= 0)
|
|
fatal("%s line %d: Badly formatted port number.",
|
|
filename, linenum);
|
|
break;
|
|
|
|
case sLoginGraceTime:
|
|
intptr = &options->login_grace_time;
|
|
parse_time:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: missing time value.",
|
|
filename, linenum);
|
|
if ((value = convtime(arg)) == -1)
|
|
fatal("%s line %d: invalid time value.",
|
|
filename, linenum);
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case sListenAddress:
|
|
arg = argv_next(&ac, &av);
|
|
if (arg == NULL || *arg == '\0')
|
|
fatal("%s line %d: missing address",
|
|
filename, linenum);
|
|
/* check for bare IPv6 address: no "[]" and 2 or more ":" */
|
|
if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
|
|
&& strchr(p+1, ':') != NULL) {
|
|
port = 0;
|
|
p = arg;
|
|
} else {
|
|
arg2 = NULL;
|
|
p = hpdelim(&arg);
|
|
if (p == NULL)
|
|
fatal("%s line %d: bad address:port usage",
|
|
filename, linenum);
|
|
p = cleanhostname(p);
|
|
if (arg == NULL)
|
|
port = 0;
|
|
else if ((port = a2port(arg)) <= 0)
|
|
fatal("%s line %d: bad port number",
|
|
filename, linenum);
|
|
}
|
|
/* Optional routing table */
|
|
arg2 = NULL;
|
|
if ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (strcmp(arg, "rdomain") != 0 ||
|
|
(arg2 = argv_next(&ac, &av)) == NULL)
|
|
fatal("%s line %d: bad ListenAddress syntax",
|
|
filename, linenum);
|
|
if (!valid_rdomain(arg2))
|
|
fatal("%s line %d: bad routing domain",
|
|
filename, linenum);
|
|
}
|
|
queue_listen_addr(options, p, arg2, port);
|
|
|
|
break;
|
|
|
|
case sAddressFamily:
|
|
intptr = &options->address_family;
|
|
multistate_ptr = multistate_addressfamily;
|
|
parse_multistate:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: missing argument.",
|
|
filename, linenum);
|
|
value = -1;
|
|
for (i = 0; multistate_ptr[i].key != NULL; i++) {
|
|
if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
|
|
value = multistate_ptr[i].value;
|
|
break;
|
|
}
|
|
}
|
|
if (value == -1)
|
|
fatal("%s line %d: unsupported option \"%s\".",
|
|
filename, linenum, arg);
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case sHostKeyFile:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: missing file name.",
|
|
filename, linenum);
|
|
if (*activep) {
|
|
servconf_add_hostkey(filename, linenum,
|
|
options, arg, 1);
|
|
}
|
|
break;
|
|
|
|
case sHostKeyAgent:
|
|
charptr = &options->host_key_agent;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: missing socket name.",
|
|
filename, linenum);
|
|
if (*activep && *charptr == NULL)
|
|
*charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
|
|
xstrdup(arg) : derelativise_path(arg);
|
|
break;
|
|
|
|
case sHostCertificate:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: missing file name.",
|
|
filename, linenum);
|
|
if (*activep)
|
|
servconf_add_hostcert(filename, linenum, options, arg);
|
|
break;
|
|
|
|
case sPidFile:
|
|
charptr = &options->pid_file;
|
|
parse_filename:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: missing file name.",
|
|
filename, linenum);
|
|
if (*activep && *charptr == NULL) {
|
|
*charptr = derelativise_path(arg);
|
|
/* increase optional counter */
|
|
if (intptr != NULL)
|
|
*intptr = *intptr + 1;
|
|
}
|
|
break;
|
|
|
|
case sModuliFile:
|
|
charptr = &options->moduli_file;
|
|
goto parse_filename;
|
|
|
|
case sPermitRootLogin:
|
|
intptr = &options->permit_root_login;
|
|
multistate_ptr = multistate_permitrootlogin;
|
|
goto parse_multistate;
|
|
|
|
case sIgnoreRhosts:
|
|
intptr = &options->ignore_rhosts;
|
|
multistate_ptr = multistate_ignore_rhosts;
|
|
goto parse_multistate;
|
|
|
|
case sIgnoreUserKnownHosts:
|
|
intptr = &options->ignore_user_known_hosts;
|
|
parse_flag:
|
|
multistate_ptr = multistate_flag;
|
|
goto parse_multistate;
|
|
|
|
case sHostbasedAuthentication:
|
|
intptr = &options->hostbased_authentication;
|
|
goto parse_flag;
|
|
|
|
case sHostbasedUsesNameFromPacketOnly:
|
|
intptr = &options->hostbased_uses_name_from_packet_only;
|
|
goto parse_flag;
|
|
|
|
case sHostbasedAcceptedAlgorithms:
|
|
charptr = &options->hostbased_accepted_algos;
|
|
parse_pubkey_algos:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: Missing argument.",
|
|
filename, linenum);
|
|
if (*arg != '-' &&
|
|
!sshkey_names_valid2(*arg == '+' || *arg == '^' ?
|
|
arg + 1 : arg, 1))
|
|
fatal("%s line %d: Bad key types '%s'.",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
if (*activep && *charptr == NULL)
|
|
*charptr = xstrdup(arg);
|
|
break;
|
|
|
|
case sHostKeyAlgorithms:
|
|
charptr = &options->hostkeyalgorithms;
|
|
goto parse_pubkey_algos;
|
|
|
|
case sCASignatureAlgorithms:
|
|
charptr = &options->ca_sign_algorithms;
|
|
goto parse_pubkey_algos;
|
|
|
|
case sPubkeyAuthentication:
|
|
intptr = &options->pubkey_authentication;
|
|
goto parse_flag;
|
|
|
|
case sPubkeyAcceptedAlgorithms:
|
|
charptr = &options->pubkey_accepted_algos;
|
|
goto parse_pubkey_algos;
|
|
|
|
case sPubkeyAuthOptions:
|
|
intptr = &options->pubkey_auth_options;
|
|
value = 0;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (strcasecmp(arg, "none") == 0)
|
|
continue;
|
|
if (strcasecmp(arg, "touch-required") == 0)
|
|
value |= PUBKEYAUTH_TOUCH_REQUIRED;
|
|
else if (strcasecmp(arg, "verify-required") == 0)
|
|
value |= PUBKEYAUTH_VERIFY_REQUIRED;
|
|
else {
|
|
error("%s line %d: unsupported %s option %s",
|
|
filename, linenum, keyword, arg);
|
|
goto out;
|
|
}
|
|
}
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case sKerberosAuthentication:
|
|
intptr = &options->kerberos_authentication;
|
|
goto parse_flag;
|
|
|
|
case sKerberosOrLocalPasswd:
|
|
intptr = &options->kerberos_or_local_passwd;
|
|
goto parse_flag;
|
|
|
|
case sKerberosTicketCleanup:
|
|
intptr = &options->kerberos_ticket_cleanup;
|
|
goto parse_flag;
|
|
|
|
case sKerberosGetAFSToken:
|
|
intptr = &options->kerberos_get_afs_token;
|
|
goto parse_flag;
|
|
|
|
case sGssAuthentication:
|
|
intptr = &options->gss_authentication;
|
|
goto parse_flag;
|
|
|
|
case sGssCleanupCreds:
|
|
intptr = &options->gss_cleanup_creds;
|
|
goto parse_flag;
|
|
|
|
case sGssStrictAcceptor:
|
|
intptr = &options->gss_strict_acceptor;
|
|
goto parse_flag;
|
|
|
|
case sPasswordAuthentication:
|
|
intptr = &options->password_authentication;
|
|
goto parse_flag;
|
|
|
|
case sKbdInteractiveAuthentication:
|
|
intptr = &options->kbd_interactive_authentication;
|
|
goto parse_flag;
|
|
|
|
case sPrintMotd:
|
|
intptr = &options->print_motd;
|
|
goto parse_flag;
|
|
|
|
case sPrintLastLog:
|
|
intptr = &options->print_lastlog;
|
|
goto parse_flag;
|
|
|
|
case sX11Forwarding:
|
|
intptr = &options->x11_forwarding;
|
|
goto parse_flag;
|
|
|
|
case sX11DisplayOffset:
|
|
intptr = &options->x11_display_offset;
|
|
parse_int:
|
|
arg = argv_next(&ac, &av);
|
|
if ((errstr = atoi_err(arg, &value)) != NULL)
|
|
fatal("%s line %d: %s integer value %s.",
|
|
filename, linenum, keyword, errstr);
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case sX11UseLocalhost:
|
|
intptr = &options->x11_use_localhost;
|
|
goto parse_flag;
|
|
|
|
case sXAuthLocation:
|
|
charptr = &options->xauth_location;
|
|
goto parse_filename;
|
|
|
|
case sPermitTTY:
|
|
intptr = &options->permit_tty;
|
|
goto parse_flag;
|
|
|
|
case sPermitUserRC:
|
|
intptr = &options->permit_user_rc;
|
|
goto parse_flag;
|
|
|
|
case sStrictModes:
|
|
intptr = &options->strict_modes;
|
|
goto parse_flag;
|
|
|
|
case sTCPKeepAlive:
|
|
intptr = &options->tcp_keep_alive;
|
|
goto parse_flag;
|
|
|
|
case sEmptyPasswd:
|
|
intptr = &options->permit_empty_passwd;
|
|
goto parse_flag;
|
|
|
|
case sPermitUserEnvironment:
|
|
intptr = &options->permit_user_env;
|
|
charptr = &options->permit_user_env_allowlist;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
value = 0;
|
|
p = NULL;
|
|
if (strcmp(arg, "yes") == 0)
|
|
value = 1;
|
|
else if (strcmp(arg, "no") == 0)
|
|
value = 0;
|
|
else {
|
|
/* Pattern-list specified */
|
|
value = 1;
|
|
p = xstrdup(arg);
|
|
}
|
|
if (*activep && *intptr == -1) {
|
|
*intptr = value;
|
|
*charptr = p;
|
|
p = NULL;
|
|
}
|
|
free(p);
|
|
break;
|
|
|
|
case sCompression:
|
|
intptr = &options->compression;
|
|
multistate_ptr = multistate_compression;
|
|
goto parse_multistate;
|
|
|
|
case sRekeyLimit:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (strcmp(arg, "default") == 0) {
|
|
val64 = 0;
|
|
} else {
|
|
if (scan_scaled(arg, &val64) == -1)
|
|
fatal("%.200s line %d: Bad %s number '%s': %s",
|
|
filename, linenum, keyword,
|
|
arg, strerror(errno));
|
|
if (val64 != 0 && val64 < 16)
|
|
fatal("%.200s line %d: %s too small",
|
|
filename, linenum, keyword);
|
|
}
|
|
if (*activep && options->rekey_limit == -1)
|
|
options->rekey_limit = val64;
|
|
if (ac != 0) { /* optional rekey interval present */
|
|
if (strcmp(av[0], "none") == 0) {
|
|
(void)argv_next(&ac, &av); /* discard */
|
|
break;
|
|
}
|
|
intptr = &options->rekey_interval;
|
|
goto parse_time;
|
|
}
|
|
break;
|
|
|
|
case sGatewayPorts:
|
|
intptr = &options->fwd_opts.gateway_ports;
|
|
multistate_ptr = multistate_gatewayports;
|
|
goto parse_multistate;
|
|
|
|
case sUseDNS:
|
|
intptr = &options->use_dns;
|
|
goto parse_flag;
|
|
|
|
case sLogFacility:
|
|
log_facility_ptr = &options->log_facility;
|
|
arg = argv_next(&ac, &av);
|
|
value = log_facility_number(arg);
|
|
if (value == SYSLOG_FACILITY_NOT_SET)
|
|
fatal("%.200s line %d: unsupported log facility '%s'",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
if (*log_facility_ptr == -1)
|
|
*log_facility_ptr = (SyslogFacility) value;
|
|
break;
|
|
|
|
case sLogLevel:
|
|
log_level_ptr = &options->log_level;
|
|
arg = argv_next(&ac, &av);
|
|
value = log_level_number(arg);
|
|
if (value == SYSLOG_LEVEL_NOT_SET)
|
|
fatal("%.200s line %d: unsupported log level '%s'",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
if (*activep && *log_level_ptr == -1)
|
|
*log_level_ptr = (LogLevel) value;
|
|
break;
|
|
|
|
case sLogVerbose:
|
|
found = options->num_log_verbose == 0;
|
|
i = 0;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0') {
|
|
error("%s line %d: keyword %s empty argument",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
/* Allow "none" only in first position */
|
|
if (strcasecmp(arg, "none") == 0) {
|
|
if (i > 0 || ac > 0) {
|
|
error("%s line %d: keyword %s \"none\" "
|
|
"argument must appear alone.",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
}
|
|
i++;
|
|
if (!found || !*activep)
|
|
continue;
|
|
opt_array_append(filename, linenum, keyword,
|
|
&options->log_verbose, &options->num_log_verbose,
|
|
arg);
|
|
}
|
|
break;
|
|
|
|
case sAllowTcpForwarding:
|
|
intptr = &options->allow_tcp_forwarding;
|
|
multistate_ptr = multistate_tcpfwd;
|
|
goto parse_multistate;
|
|
|
|
case sAllowStreamLocalForwarding:
|
|
intptr = &options->allow_streamlocal_forwarding;
|
|
multistate_ptr = multistate_tcpfwd;
|
|
goto parse_multistate;
|
|
|
|
case sAllowAgentForwarding:
|
|
intptr = &options->allow_agent_forwarding;
|
|
goto parse_flag;
|
|
|
|
case sDisableForwarding:
|
|
intptr = &options->disable_forwarding;
|
|
goto parse_flag;
|
|
|
|
case sAllowUsers:
|
|
chararrayptr = &options->allow_users;
|
|
uintptr = &options->num_allow_users;
|
|
parse_allowdenyusers:
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0' ||
|
|
match_user(NULL, NULL, NULL, arg) == -1)
|
|
fatal("%s line %d: invalid %s pattern: \"%s\"",
|
|
filename, linenum, keyword, arg);
|
|
if (!*activep)
|
|
continue;
|
|
opt_array_append(filename, linenum, keyword,
|
|
chararrayptr, uintptr, arg);
|
|
}
|
|
break;
|
|
|
|
case sDenyUsers:
|
|
chararrayptr = &options->deny_users;
|
|
uintptr = &options->num_deny_users;
|
|
goto parse_allowdenyusers;
|
|
|
|
case sAllowGroups:
|
|
chararrayptr = &options->allow_groups;
|
|
uintptr = &options->num_allow_groups;
|
|
parse_allowdenygroups:
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0')
|
|
fatal("%s line %d: empty %s pattern",
|
|
filename, linenum, keyword);
|
|
if (!*activep)
|
|
continue;
|
|
opt_array_append(filename, linenum, keyword,
|
|
chararrayptr, uintptr, arg);
|
|
}
|
|
break;
|
|
|
|
case sDenyGroups:
|
|
chararrayptr = &options->deny_groups;
|
|
uintptr = &options->num_deny_groups;
|
|
goto parse_allowdenygroups;
|
|
|
|
case sCiphers:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (*arg != '-' &&
|
|
!ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
|
|
fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
if (options->ciphers == NULL)
|
|
options->ciphers = xstrdup(arg);
|
|
break;
|
|
|
|
case sMacs:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (*arg != '-' &&
|
|
!mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
|
|
fatal("%s line %d: Bad SSH2 mac spec '%s'.",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
if (options->macs == NULL)
|
|
options->macs = xstrdup(arg);
|
|
break;
|
|
|
|
case sKexAlgorithms:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (*arg != '-' &&
|
|
!kex_names_valid(*arg == '+' || *arg == '^' ?
|
|
arg + 1 : arg))
|
|
fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
if (options->kex_algorithms == NULL)
|
|
options->kex_algorithms = xstrdup(arg);
|
|
break;
|
|
|
|
case sSubsystem:
|
|
if (options->num_subsystems >= MAX_SUBSYSTEMS) {
|
|
fatal("%s line %d: too many subsystems defined.",
|
|
filename, linenum);
|
|
}
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (!*activep) {
|
|
arg = argv_next(&ac, &av);
|
|
break;
|
|
}
|
|
for (i = 0; i < options->num_subsystems; i++)
|
|
if (strcmp(arg, options->subsystem_name[i]) == 0)
|
|
fatal("%s line %d: Subsystem '%s' "
|
|
"already defined.", filename, linenum, arg);
|
|
options->subsystem_name[options->num_subsystems] = xstrdup(arg);
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: Missing subsystem command.",
|
|
filename, linenum);
|
|
options->subsystem_command[options->num_subsystems] = xstrdup(arg);
|
|
|
|
/* Collect arguments (separate to executable) */
|
|
p = xstrdup(arg);
|
|
len = strlen(p) + 1;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
len += 1 + strlen(arg);
|
|
p = xreallocarray(p, 1, len);
|
|
strlcat(p, " ", len);
|
|
strlcat(p, arg, len);
|
|
}
|
|
options->subsystem_args[options->num_subsystems] = p;
|
|
options->num_subsystems++;
|
|
break;
|
|
|
|
case sMaxStartups:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if ((n = sscanf(arg, "%d:%d:%d",
|
|
&options->max_startups_begin,
|
|
&options->max_startups_rate,
|
|
&options->max_startups)) == 3) {
|
|
if (options->max_startups_begin >
|
|
options->max_startups ||
|
|
options->max_startups_rate > 100 ||
|
|
options->max_startups_rate < 1)
|
|
fatal("%s line %d: Invalid %s spec.",
|
|
filename, linenum, keyword);
|
|
} else if (n != 1)
|
|
fatal("%s line %d: Invalid %s spec.",
|
|
filename, linenum, keyword);
|
|
else
|
|
options->max_startups = options->max_startups_begin;
|
|
if (options->max_startups <= 0 ||
|
|
options->max_startups_begin <= 0)
|
|
fatal("%s line %d: Invalid %s spec.",
|
|
filename, linenum, keyword);
|
|
break;
|
|
|
|
case sPerSourceNetBlockSize:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
switch (n = sscanf(arg, "%d:%d", &value, &value2)) {
|
|
case 2:
|
|
if (value2 < 0 || value2 > 128)
|
|
n = -1;
|
|
/* FALLTHROUGH */
|
|
case 1:
|
|
if (value < 0 || value > 32)
|
|
n = -1;
|
|
}
|
|
if (n != 1 && n != 2)
|
|
fatal("%s line %d: Invalid %s spec.",
|
|
filename, linenum, keyword);
|
|
if (*activep) {
|
|
options->per_source_masklen_ipv4 = value;
|
|
options->per_source_masklen_ipv6 = value2;
|
|
}
|
|
break;
|
|
|
|
case sPerSourceMaxStartups:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (strcmp(arg, "none") == 0) { /* no limit */
|
|
value = INT_MAX;
|
|
} else {
|
|
if ((errstr = atoi_err(arg, &value)) != NULL)
|
|
fatal("%s line %d: %s integer value %s.",
|
|
filename, linenum, keyword, errstr);
|
|
}
|
|
if (*activep)
|
|
options->per_source_max_startups = value;
|
|
break;
|
|
|
|
case sMaxAuthTries:
|
|
intptr = &options->max_authtries;
|
|
goto parse_int;
|
|
|
|
case sMaxSessions:
|
|
intptr = &options->max_sessions;
|
|
goto parse_int;
|
|
|
|
case sBanner:
|
|
charptr = &options->banner;
|
|
goto parse_filename;
|
|
|
|
/*
|
|
* These options can contain %X options expanded at
|
|
* connect time, so that you can specify paths like:
|
|
*
|
|
* AuthorizedKeysFile /etc/ssh_keys/%u
|
|
*/
|
|
case sAuthorizedKeysFile:
|
|
uvalue = options->num_authkeys_files;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0') {
|
|
error("%s line %d: keyword %s empty argument",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
arg2 = tilde_expand_filename(arg, getuid());
|
|
if (*activep && uvalue == 0) {
|
|
opt_array_append(filename, linenum, keyword,
|
|
&options->authorized_keys_files,
|
|
&options->num_authkeys_files, arg2);
|
|
}
|
|
free(arg2);
|
|
}
|
|
break;
|
|
|
|
case sAuthorizedPrincipalsFile:
|
|
charptr = &options->authorized_principals_file;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (*activep && *charptr == NULL) {
|
|
*charptr = tilde_expand_filename(arg, getuid());
|
|
/* increase optional counter */
|
|
if (intptr != NULL)
|
|
*intptr = *intptr + 1;
|
|
}
|
|
break;
|
|
|
|
case sClientAliveInterval:
|
|
intptr = &options->client_alive_interval;
|
|
goto parse_time;
|
|
|
|
case sClientAliveCountMax:
|
|
intptr = &options->client_alive_count_max;
|
|
goto parse_int;
|
|
|
|
case sAcceptEnv:
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0' || strchr(arg, '=') != NULL)
|
|
fatal("%s line %d: Invalid environment name.",
|
|
filename, linenum);
|
|
if (!*activep)
|
|
continue;
|
|
opt_array_append(filename, linenum, keyword,
|
|
&options->accept_env, &options->num_accept_env,
|
|
arg);
|
|
}
|
|
break;
|
|
|
|
case sSetEnv:
|
|
uvalue = options->num_setenv;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0' || strchr(arg, '=') == NULL)
|
|
fatal("%s line %d: Invalid environment.",
|
|
filename, linenum);
|
|
if (!*activep || uvalue != 0)
|
|
continue;
|
|
if (lookup_setenv_in_list(arg, options->setenv,
|
|
options->num_setenv) != NULL) {
|
|
debug2("%s line %d: ignoring duplicate env "
|
|
"name \"%.64s\"", filename, linenum, arg);
|
|
continue;
|
|
}
|
|
opt_array_append(filename, linenum, keyword,
|
|
&options->setenv, &options->num_setenv, arg);
|
|
}
|
|
break;
|
|
|
|
case sPermitTunnel:
|
|
intptr = &options->permit_tun;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
value = -1;
|
|
for (i = 0; tunmode_desc[i].val != -1; i++)
|
|
if (strcmp(tunmode_desc[i].text, arg) == 0) {
|
|
value = tunmode_desc[i].val;
|
|
break;
|
|
}
|
|
if (value == -1)
|
|
fatal("%s line %d: bad %s argument %s",
|
|
filename, linenum, keyword, arg);
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case sInclude:
|
|
if (cmdline) {
|
|
fatal("Include directive not supported as a "
|
|
"command-line option");
|
|
}
|
|
value = 0;
|
|
while ((arg2 = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg2 == '\0') {
|
|
error("%s line %d: keyword %s empty argument",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
value++;
|
|
found = 0;
|
|
if (*arg2 != '/' && *arg2 != '~') {
|
|
xasprintf(&arg, "%s/%s", SSHDIR, arg2);
|
|
} else
|
|
arg = xstrdup(arg2);
|
|
|
|
/*
|
|
* Don't let included files clobber the containing
|
|
* file's Match state.
|
|
*/
|
|
oactive = *activep;
|
|
|
|
/* consult cache of include files */
|
|
TAILQ_FOREACH(item, includes, entry) {
|
|
if (strcmp(item->selector, arg) != 0)
|
|
continue;
|
|
if (item->filename != NULL) {
|
|
parse_server_config_depth(options,
|
|
item->filename, item->contents,
|
|
includes, connectinfo,
|
|
(*inc_flags & SSHCFG_MATCH_ONLY
|
|
? SSHCFG_MATCH_ONLY : (oactive
|
|
? 0 : SSHCFG_NEVERMATCH)),
|
|
activep, depth + 1);
|
|
}
|
|
found = 1;
|
|
*activep = oactive;
|
|
}
|
|
if (found != 0) {
|
|
free(arg);
|
|
continue;
|
|
}
|
|
|
|
/* requested glob was not in cache */
|
|
debug2("%s line %d: new include %s",
|
|
filename, linenum, arg);
|
|
if ((r = glob(arg, 0, NULL, &gbuf)) != 0) {
|
|
if (r != GLOB_NOMATCH) {
|
|
fatal("%s line %d: include \"%s\" glob "
|
|
"failed", filename, linenum, arg);
|
|
}
|
|
/*
|
|
* If no entry matched then record a
|
|
* placeholder to skip later glob calls.
|
|
*/
|
|
debug2("%s line %d: no match for %s",
|
|
filename, linenum, arg);
|
|
item = xcalloc(1, sizeof(*item));
|
|
item->selector = strdup(arg);
|
|
TAILQ_INSERT_TAIL(includes,
|
|
item, entry);
|
|
}
|
|
if (gbuf.gl_pathc > INT_MAX)
|
|
fatal_f("too many glob results");
|
|
for (n = 0; n < (int)gbuf.gl_pathc; n++) {
|
|
debug2("%s line %d: including %s",
|
|
filename, linenum, gbuf.gl_pathv[n]);
|
|
item = xcalloc(1, sizeof(*item));
|
|
item->selector = strdup(arg);
|
|
item->filename = strdup(gbuf.gl_pathv[n]);
|
|
if ((item->contents = sshbuf_new()) == NULL)
|
|
fatal_f("sshbuf_new failed");
|
|
load_server_config(item->filename,
|
|
item->contents);
|
|
parse_server_config_depth(options,
|
|
item->filename, item->contents,
|
|
includes, connectinfo,
|
|
(*inc_flags & SSHCFG_MATCH_ONLY
|
|
? SSHCFG_MATCH_ONLY : (oactive
|
|
? 0 : SSHCFG_NEVERMATCH)),
|
|
activep, depth + 1);
|
|
*activep = oactive;
|
|
TAILQ_INSERT_TAIL(includes, item, entry);
|
|
}
|
|
globfree(&gbuf);
|
|
free(arg);
|
|
}
|
|
if (value == 0) {
|
|
fatal("%s line %d: %s missing filename argument",
|
|
filename, linenum, keyword);
|
|
}
|
|
break;
|
|
|
|
case sMatch:
|
|
if (cmdline)
|
|
fatal("Match directive not supported as a command-line "
|
|
"option");
|
|
value = match_cfg_line(&str, linenum,
|
|
(*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
|
|
if (value < 0)
|
|
fatal("%s line %d: Bad Match condition", filename,
|
|
linenum);
|
|
*activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
|
|
/*
|
|
* The MATCH_ONLY flag is applicable only until the first
|
|
* match block.
|
|
*/
|
|
*inc_flags &= ~SSHCFG_MATCH_ONLY;
|
|
/*
|
|
* If match_cfg_line() didn't consume all its arguments then
|
|
* arrange for the extra arguments check below to fail.
|
|
*/
|
|
if (str == NULL || *str == '\0')
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
case sPermitListen:
|
|
case sPermitOpen:
|
|
if (opcode == sPermitListen) {
|
|
uintptr = &options->num_permitted_listens;
|
|
chararrayptr = &options->permitted_listens;
|
|
} else {
|
|
uintptr = &options->num_permitted_opens;
|
|
chararrayptr = &options->permitted_opens;
|
|
}
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
uvalue = *uintptr; /* modified later */
|
|
if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
|
|
if (*activep && uvalue == 0) {
|
|
*uintptr = 1;
|
|
*chararrayptr = xcalloc(1,
|
|
sizeof(**chararrayptr));
|
|
(*chararrayptr)[0] = xstrdup(arg);
|
|
}
|
|
break;
|
|
}
|
|
for (; arg != NULL && *arg != '\0'; arg = argv_next(&ac, &av)) {
|
|
if (opcode == sPermitListen &&
|
|
strchr(arg, ':') == NULL) {
|
|
/*
|
|
* Allow bare port number for PermitListen
|
|
* to indicate a wildcard listen host.
|
|
*/
|
|
xasprintf(&arg2, "*:%s", arg);
|
|
} else {
|
|
arg2 = xstrdup(arg);
|
|
p = hpdelim(&arg);
|
|
if (p == NULL) {
|
|
fatal("%s line %d: %s missing host",
|
|
filename, linenum, keyword);
|
|
}
|
|
p = cleanhostname(p);
|
|
}
|
|
if (arg == NULL ||
|
|
((port = permitopen_port(arg)) < 0)) {
|
|
fatal("%s line %d: %s bad port number",
|
|
filename, linenum, keyword);
|
|
}
|
|
if (*activep && uvalue == 0) {
|
|
opt_array_append(filename, linenum, keyword,
|
|
chararrayptr, uintptr, arg2);
|
|
}
|
|
free(arg2);
|
|
}
|
|
break;
|
|
|
|
case sForceCommand:
|
|
if (str == NULL || *str == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
len = strspn(str, WHITESPACE);
|
|
if (*activep && options->adm_forced_command == NULL)
|
|
options->adm_forced_command = xstrdup(str + len);
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
case sChrootDirectory:
|
|
charptr = &options->chroot_directory;
|
|
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (*activep && *charptr == NULL)
|
|
*charptr = xstrdup(arg);
|
|
break;
|
|
|
|
case sTrustedUserCAKeys:
|
|
charptr = &options->trusted_user_ca_keys;
|
|
goto parse_filename;
|
|
|
|
case sRevokedKeys:
|
|
charptr = &options->revoked_keys_file;
|
|
goto parse_filename;
|
|
|
|
case sSecurityKeyProvider:
|
|
charptr = &options->sk_provider;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (*activep && *charptr == NULL) {
|
|
*charptr = strcasecmp(arg, "internal") == 0 ?
|
|
xstrdup(arg) : derelativise_path(arg);
|
|
/* increase optional counter */
|
|
if (intptr != NULL)
|
|
*intptr = *intptr + 1;
|
|
}
|
|
break;
|
|
|
|
case sIPQoS:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if ((value = parse_ipqos(arg)) == -1)
|
|
fatal("%s line %d: Bad %s value: %s",
|
|
filename, linenum, keyword, arg);
|
|
arg = argv_next(&ac, &av);
|
|
if (arg == NULL)
|
|
value2 = value;
|
|
else if ((value2 = parse_ipqos(arg)) == -1)
|
|
fatal("%s line %d: Bad %s value: %s",
|
|
filename, linenum, keyword, arg);
|
|
if (*activep) {
|
|
options->ip_qos_interactive = value;
|
|
options->ip_qos_bulk = value2;
|
|
}
|
|
break;
|
|
|
|
case sVersionAddendum:
|
|
if (str == NULL || *str == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
len = strspn(str, WHITESPACE);
|
|
if (strchr(str + len, '\r') != NULL) {
|
|
fatal("%.200s line %d: Invalid %s argument",
|
|
filename, linenum, keyword);
|
|
}
|
|
if ((arg = strchr(line, '#')) != NULL) {
|
|
*arg = '\0';
|
|
rtrim(line);
|
|
}
|
|
if (*activep && options->version_addendum == NULL) {
|
|
if (strcasecmp(str + len, "none") == 0)
|
|
options->version_addendum = xstrdup("");
|
|
else
|
|
options->version_addendum = xstrdup(str + len);
|
|
}
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
case sAuthorizedKeysCommand:
|
|
charptr = &options->authorized_keys_command;
|
|
parse_command:
|
|
len = strspn(str, WHITESPACE);
|
|
if (str[len] != '/' && strcasecmp(str + len, "none") != 0) {
|
|
fatal("%.200s line %d: %s must be an absolute path",
|
|
filename, linenum, keyword);
|
|
}
|
|
if (*activep && options->authorized_keys_command == NULL)
|
|
*charptr = xstrdup(str + len);
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
case sAuthorizedKeysCommandUser:
|
|
charptr = &options->authorized_keys_command_user;
|
|
parse_localuser:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
fatal("%s line %d: missing %s argument.",
|
|
filename, linenum, keyword);
|
|
}
|
|
if (*activep && *charptr == NULL)
|
|
*charptr = xstrdup(arg);
|
|
break;
|
|
|
|
case sAuthorizedPrincipalsCommand:
|
|
charptr = &options->authorized_principals_command;
|
|
goto parse_command;
|
|
|
|
case sAuthorizedPrincipalsCommandUser:
|
|
charptr = &options->authorized_principals_command_user;
|
|
goto parse_localuser;
|
|
|
|
case sAuthenticationMethods:
|
|
found = options->num_auth_methods == 0;
|
|
value = 0; /* seen "any" pseudo-method */
|
|
value2 = 0; /* successfully parsed any method */
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (strcmp(arg, "any") == 0) {
|
|
if (options->num_auth_methods > 0) {
|
|
fatal("%s line %d: \"any\" must "
|
|
"appear alone in %s",
|
|
filename, linenum, keyword);
|
|
}
|
|
value = 1;
|
|
} else if (value) {
|
|
fatal("%s line %d: \"any\" must appear "
|
|
"alone in %s", filename, linenum, keyword);
|
|
} else if (auth2_methods_valid(arg, 0) != 0) {
|
|
fatal("%s line %d: invalid %s method list.",
|
|
filename, linenum, keyword);
|
|
}
|
|
value2 = 1;
|
|
if (!found || !*activep)
|
|
continue;
|
|
opt_array_append(filename, linenum, keyword,
|
|
&options->auth_methods,
|
|
&options->num_auth_methods, arg);
|
|
}
|
|
if (value2 == 0) {
|
|
fatal("%s line %d: no %s specified",
|
|
filename, linenum, keyword);
|
|
}
|
|
break;
|
|
|
|
case sStreamLocalBindMask:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
/* Parse mode in octal format */
|
|
value = strtol(arg, &p, 8);
|
|
if (arg == p || value < 0 || value > 0777)
|
|
fatal("%s line %d: Invalid %s.",
|
|
filename, linenum, keyword);
|
|
if (*activep)
|
|
options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
|
|
break;
|
|
|
|
case sStreamLocalBindUnlink:
|
|
intptr = &options->fwd_opts.streamlocal_bind_unlink;
|
|
goto parse_flag;
|
|
|
|
case sFingerprintHash:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if ((value = ssh_digest_alg_by_name(arg)) == -1)
|
|
fatal("%.200s line %d: Invalid %s algorithm \"%s\".",
|
|
filename, linenum, keyword, arg);
|
|
if (*activep)
|
|
options->fingerprint_hash = value;
|
|
break;
|
|
|
|
case sExposeAuthInfo:
|
|
intptr = &options->expose_userauth_info;
|
|
goto parse_flag;
|
|
|
|
case sRDomain:
|
|
#if !defined(__OpenBSD__) && !defined(HAVE_SYS_SET_PROCESS_RDOMAIN)
|
|
fatal("%s line %d: setting RDomain not supported on this "
|
|
"platform.", filename, linenum);
|
|
#endif
|
|
charptr = &options->routing_domain;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0')
|
|
fatal("%s line %d: %s missing argument.",
|
|
filename, linenum, keyword);
|
|
if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
|
|
!valid_rdomain(arg))
|
|
fatal("%s line %d: invalid routing domain",
|
|
filename, linenum);
|
|
if (*activep && *charptr == NULL)
|
|
*charptr = xstrdup(arg);
|
|
break;
|
|
|
|
case sRequiredRSASize:
|
|
intptr = &options->required_rsa_size;
|
|
goto parse_int;
|
|
|
|
case sChannelTimeout:
|
|
uvalue = options->num_channel_timeouts;
|
|
i = 0;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
/* Allow "none" only in first position */
|
|
if (strcasecmp(arg, "none") == 0) {
|
|
if (i > 0 || ac > 0) {
|
|
error("%s line %d: keyword %s \"none\" "
|
|
"argument must appear alone.",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
} else if (parse_timeout(arg, NULL, NULL) != 0) {
|
|
fatal("%s line %d: invalid channel timeout %s",
|
|
filename, linenum, arg);
|
|
}
|
|
if (!*activep || uvalue != 0)
|
|
continue;
|
|
opt_array_append(filename, linenum, keyword,
|
|
&options->channel_timeouts,
|
|
&options->num_channel_timeouts, arg);
|
|
}
|
|
break;
|
|
|
|
case sUnusedConnectionTimeout:
|
|
intptr = &options->unused_connection_timeout;
|
|
/* peek at first arg for "none" so we can reuse parse_time */
|
|
if (av[0] != NULL && strcasecmp(av[0], "none") == 0) {
|
|
(void)argv_next(&ac, &av); /* consume arg */
|
|
if (*activep)
|
|
*intptr = 0;
|
|
break;
|
|
}
|
|
goto parse_time;
|
|
|
|
case sUseBlacklist:
|
|
intptr = &options->use_blacklist;
|
|
goto parse_flag;
|
|
|
|
case sDeprecated:
|
|
case sIgnore:
|
|
case sUnsupported:
|
|
do_log2(opcode == sIgnore ?
|
|
SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
|
|
"%s line %d: %s option %s", filename, linenum,
|
|
opcode == sUnsupported ? "Unsupported" : "Deprecated",
|
|
keyword);
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
default:
|
|
fatal("%s line %d: Missing handler for opcode %s (%d)",
|
|
filename, linenum, keyword, opcode);
|
|
}
|
|
/* Check that there is no garbage at end of line. */
|
|
if (ac > 0) {
|
|
error("%.200s line %d: keyword %s extra arguments "
|
|
"at end of line", filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
|
|
/* success */
|
|
ret = 0;
|
|
out:
|
|
argv_free(oav, oac);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
process_server_config_line(ServerOptions *options, char *line,
|
|
const char *filename, int linenum, int *activep,
|
|
struct connection_info *connectinfo, struct include_list *includes)
|
|
{
|
|
int inc_flags = 0;
|
|
|
|
return process_server_config_line_depth(options, line, filename,
|
|
linenum, activep, connectinfo, &inc_flags, 0, includes);
|
|
}
|
|
|
|
|
|
/* Reads the server configuration file. */
|
|
|
|
void
|
|
load_server_config(const char *filename, struct sshbuf *conf)
|
|
{
|
|
struct stat st;
|
|
char *line = NULL, *cp;
|
|
size_t linesize = 0;
|
|
FILE *f;
|
|
int r;
|
|
|
|
debug2_f("filename %s", filename);
|
|
if ((f = fopen(filename, "r")) == NULL) {
|
|
perror(filename);
|
|
exit(1);
|
|
}
|
|
sshbuf_reset(conf);
|
|
/* grow buffer, so realloc is avoided for large config files */
|
|
if (fstat(fileno(f), &st) == 0 && st.st_size > 0 &&
|
|
(r = sshbuf_allocate(conf, st.st_size)) != 0)
|
|
fatal_fr(r, "allocate");
|
|
while (getline(&line, &linesize, f) != -1) {
|
|
/*
|
|
* Strip whitespace
|
|
* NB - preserve newlines, they are needed to reproduce
|
|
* line numbers later for error messages
|
|
*/
|
|
cp = line + strspn(line, " \t\r");
|
|
if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0)
|
|
fatal_fr(r, "sshbuf_put");
|
|
}
|
|
free(line);
|
|
if ((r = sshbuf_put_u8(conf, 0)) != 0)
|
|
fatal_fr(r, "sshbuf_put_u8");
|
|
fclose(f);
|
|
debug2_f("done config len = %zu", sshbuf_len(conf));
|
|
}
|
|
|
|
void
|
|
parse_server_match_config(ServerOptions *options,
|
|
struct include_list *includes, struct connection_info *connectinfo)
|
|
{
|
|
ServerOptions mo;
|
|
|
|
initialize_server_options(&mo);
|
|
parse_server_config(&mo, "reprocess config", cfg, includes,
|
|
connectinfo, 0);
|
|
copy_set_server_options(options, &mo, 0);
|
|
}
|
|
|
|
int parse_server_match_testspec(struct connection_info *ci, char *spec)
|
|
{
|
|
char *p;
|
|
|
|
while ((p = strsep(&spec, ",")) && *p != '\0') {
|
|
if (strncmp(p, "addr=", 5) == 0) {
|
|
ci->address = xstrdup(p + 5);
|
|
} else if (strncmp(p, "host=", 5) == 0) {
|
|
ci->host = xstrdup(p + 5);
|
|
} else if (strncmp(p, "user=", 5) == 0) {
|
|
ci->user = xstrdup(p + 5);
|
|
} else if (strncmp(p, "laddr=", 6) == 0) {
|
|
ci->laddress = xstrdup(p + 6);
|
|
} else if (strncmp(p, "rdomain=", 8) == 0) {
|
|
ci->rdomain = xstrdup(p + 8);
|
|
} else if (strncmp(p, "lport=", 6) == 0) {
|
|
ci->lport = a2port(p + 6);
|
|
if (ci->lport == -1) {
|
|
fprintf(stderr, "Invalid port '%s' in test mode"
|
|
" specification %s\n", p+6, p);
|
|
return -1;
|
|
}
|
|
} else {
|
|
fprintf(stderr, "Invalid test mode specification %s\n",
|
|
p);
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Copy any supported values that are set.
|
|
*
|
|
* If the preauth flag is set, we do not bother copying the string or
|
|
* array values that are not used pre-authentication, because any that we
|
|
* do use must be explicitly sent in mm_getpwnamallow().
|
|
*/
|
|
void
|
|
copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
|
|
{
|
|
#define M_CP_INTOPT(n) do {\
|
|
if (src->n != -1) \
|
|
dst->n = src->n; \
|
|
} while (0)
|
|
|
|
M_CP_INTOPT(password_authentication);
|
|
M_CP_INTOPT(gss_authentication);
|
|
M_CP_INTOPT(pubkey_authentication);
|
|
M_CP_INTOPT(pubkey_auth_options);
|
|
M_CP_INTOPT(kerberos_authentication);
|
|
M_CP_INTOPT(hostbased_authentication);
|
|
M_CP_INTOPT(hostbased_uses_name_from_packet_only);
|
|
M_CP_INTOPT(kbd_interactive_authentication);
|
|
M_CP_INTOPT(permit_root_login);
|
|
M_CP_INTOPT(permit_empty_passwd);
|
|
M_CP_INTOPT(ignore_rhosts);
|
|
|
|
M_CP_INTOPT(allow_tcp_forwarding);
|
|
M_CP_INTOPT(allow_streamlocal_forwarding);
|
|
M_CP_INTOPT(allow_agent_forwarding);
|
|
M_CP_INTOPT(disable_forwarding);
|
|
M_CP_INTOPT(expose_userauth_info);
|
|
M_CP_INTOPT(permit_tun);
|
|
M_CP_INTOPT(fwd_opts.gateway_ports);
|
|
M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
|
|
M_CP_INTOPT(x11_display_offset);
|
|
M_CP_INTOPT(x11_forwarding);
|
|
M_CP_INTOPT(x11_use_localhost);
|
|
M_CP_INTOPT(permit_tty);
|
|
M_CP_INTOPT(permit_user_rc);
|
|
M_CP_INTOPT(max_sessions);
|
|
M_CP_INTOPT(max_authtries);
|
|
M_CP_INTOPT(client_alive_count_max);
|
|
M_CP_INTOPT(client_alive_interval);
|
|
M_CP_INTOPT(ip_qos_interactive);
|
|
M_CP_INTOPT(ip_qos_bulk);
|
|
M_CP_INTOPT(rekey_limit);
|
|
M_CP_INTOPT(rekey_interval);
|
|
M_CP_INTOPT(log_level);
|
|
M_CP_INTOPT(required_rsa_size);
|
|
M_CP_INTOPT(unused_connection_timeout);
|
|
|
|
/*
|
|
* The bind_mask is a mode_t that may be unsigned, so we can't use
|
|
* M_CP_INTOPT - it does a signed comparison that causes compiler
|
|
* warnings.
|
|
*/
|
|
if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
|
|
dst->fwd_opts.streamlocal_bind_mask =
|
|
src->fwd_opts.streamlocal_bind_mask;
|
|
}
|
|
|
|
/* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
|
|
#define M_CP_STROPT(n) do {\
|
|
if (src->n != NULL && dst->n != src->n) { \
|
|
free(dst->n); \
|
|
dst->n = src->n; \
|
|
} \
|
|
} while(0)
|
|
#define M_CP_STRARRAYOPT(s, num_s) do {\
|
|
u_int i; \
|
|
if (src->num_s != 0) { \
|
|
for (i = 0; i < dst->num_s; i++) \
|
|
free(dst->s[i]); \
|
|
free(dst->s); \
|
|
dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
|
|
for (i = 0; i < src->num_s; i++) \
|
|
dst->s[i] = xstrdup(src->s[i]); \
|
|
dst->num_s = src->num_s; \
|
|
} \
|
|
} while(0)
|
|
|
|
/* See comment in servconf.h */
|
|
COPY_MATCH_STRING_OPTS();
|
|
|
|
/* Arguments that accept '+...' need to be expanded */
|
|
assemble_algorithms(dst);
|
|
|
|
/*
|
|
* The only things that should be below this point are string options
|
|
* which are only used after authentication.
|
|
*/
|
|
if (preauth)
|
|
return;
|
|
|
|
/* These options may be "none" to clear a global setting */
|
|
M_CP_STROPT(adm_forced_command);
|
|
if (option_clear_or_none(dst->adm_forced_command)) {
|
|
free(dst->adm_forced_command);
|
|
dst->adm_forced_command = NULL;
|
|
}
|
|
M_CP_STROPT(chroot_directory);
|
|
if (option_clear_or_none(dst->chroot_directory)) {
|
|
free(dst->chroot_directory);
|
|
dst->chroot_directory = NULL;
|
|
}
|
|
}
|
|
|
|
#undef M_CP_INTOPT
|
|
#undef M_CP_STROPT
|
|
#undef M_CP_STRARRAYOPT
|
|
|
|
#define SERVCONF_MAX_DEPTH 16
|
|
static void
|
|
parse_server_config_depth(ServerOptions *options, const char *filename,
|
|
struct sshbuf *conf, struct include_list *includes,
|
|
struct connection_info *connectinfo, int flags, int *activep, int depth)
|
|
{
|
|
int linenum, bad_options = 0;
|
|
char *cp, *obuf, *cbuf;
|
|
|
|
if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
|
|
fatal("Too many recursive configuration includes");
|
|
|
|
debug2_f("config %s len %zu%s", filename, sshbuf_len(conf),
|
|
(flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
|
|
|
|
if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
|
|
fatal_f("sshbuf_dup_string failed");
|
|
linenum = 1;
|
|
while ((cp = strsep(&cbuf, "\n")) != NULL) {
|
|
if (process_server_config_line_depth(options, cp,
|
|
filename, linenum++, activep, connectinfo, &flags,
|
|
depth, includes) != 0)
|
|
bad_options++;
|
|
}
|
|
free(obuf);
|
|
if (bad_options > 0)
|
|
fatal("%s: terminating, %d bad configuration options",
|
|
filename, bad_options);
|
|
}
|
|
|
|
void
|
|
parse_server_config(ServerOptions *options, const char *filename,
|
|
struct sshbuf *conf, struct include_list *includes,
|
|
struct connection_info *connectinfo, int reexec)
|
|
{
|
|
int active = connectinfo ? 0 : 1;
|
|
parse_server_config_depth(options, filename, conf, includes,
|
|
connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
|
|
if (!reexec)
|
|
process_queued_listen_addrs(options);
|
|
}
|
|
|
|
static const char *
|
|
fmt_multistate_int(int val, const struct multistate *m)
|
|
{
|
|
u_int i;
|
|
|
|
for (i = 0; m[i].key != NULL; i++) {
|
|
if (m[i].value == val)
|
|
return m[i].key;
|
|
}
|
|
return "UNKNOWN";
|
|
}
|
|
|
|
static const char *
|
|
fmt_intarg(ServerOpCodes code, int val)
|
|
{
|
|
if (val == -1)
|
|
return "unset";
|
|
switch (code) {
|
|
case sAddressFamily:
|
|
return fmt_multistate_int(val, multistate_addressfamily);
|
|
case sPermitRootLogin:
|
|
return fmt_multistate_int(val, multistate_permitrootlogin);
|
|
case sGatewayPorts:
|
|
return fmt_multistate_int(val, multistate_gatewayports);
|
|
case sCompression:
|
|
return fmt_multistate_int(val, multistate_compression);
|
|
case sAllowTcpForwarding:
|
|
return fmt_multistate_int(val, multistate_tcpfwd);
|
|
case sAllowStreamLocalForwarding:
|
|
return fmt_multistate_int(val, multistate_tcpfwd);
|
|
case sIgnoreRhosts:
|
|
return fmt_multistate_int(val, multistate_ignore_rhosts);
|
|
case sFingerprintHash:
|
|
return ssh_digest_alg_name(val);
|
|
default:
|
|
switch (val) {
|
|
case 0:
|
|
return "no";
|
|
case 1:
|
|
return "yes";
|
|
default:
|
|
return "UNKNOWN";
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dump_cfg_int(ServerOpCodes code, int val)
|
|
{
|
|
if (code == sUnusedConnectionTimeout && val == 0) {
|
|
printf("%s none\n", lookup_opcode_name(code));
|
|
return;
|
|
}
|
|
printf("%s %d\n", lookup_opcode_name(code), val);
|
|
}
|
|
|
|
static void
|
|
dump_cfg_oct(ServerOpCodes code, int val)
|
|
{
|
|
printf("%s 0%o\n", lookup_opcode_name(code), val);
|
|
}
|
|
|
|
static void
|
|
dump_cfg_fmtint(ServerOpCodes code, int val)
|
|
{
|
|
printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
|
|
}
|
|
|
|
static void
|
|
dump_cfg_string(ServerOpCodes code, const char *val)
|
|
{
|
|
printf("%s %s\n", lookup_opcode_name(code),
|
|
val == NULL ? "none" : val);
|
|
}
|
|
|
|
static void
|
|
dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
|
|
{
|
|
u_int i;
|
|
|
|
for (i = 0; i < count; i++)
|
|
printf("%s %s\n", lookup_opcode_name(code), vals[i]);
|
|
}
|
|
|
|
static void
|
|
dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
|
|
{
|
|
u_int i;
|
|
|
|
switch (code) {
|
|
case sAuthenticationMethods:
|
|
case sChannelTimeout:
|
|
break;
|
|
default:
|
|
if (count <= 0)
|
|
return;
|
|
break;
|
|
}
|
|
|
|
printf("%s", lookup_opcode_name(code));
|
|
for (i = 0; i < count; i++)
|
|
printf(" %s", vals[i]);
|
|
if (code == sAuthenticationMethods && count == 0)
|
|
printf(" any");
|
|
else if (code == sChannelTimeout && count == 0)
|
|
printf(" none");
|
|
printf("\n");
|
|
}
|
|
|
|
static char *
|
|
format_listen_addrs(struct listenaddr *la)
|
|
{
|
|
int r;
|
|
struct addrinfo *ai;
|
|
char addr[NI_MAXHOST], port[NI_MAXSERV];
|
|
char *laddr1 = xstrdup(""), *laddr2 = NULL;
|
|
|
|
/*
|
|
* ListenAddress must be after Port. add_one_listen_addr pushes
|
|
* addresses onto a stack, so to maintain ordering we need to
|
|
* print these in reverse order.
|
|
*/
|
|
for (ai = la->addrs; ai; ai = ai->ai_next) {
|
|
if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
|
|
sizeof(addr), port, sizeof(port),
|
|
NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
|
|
error("getnameinfo: %.100s", ssh_gai_strerror(r));
|
|
continue;
|
|
}
|
|
laddr2 = laddr1;
|
|
if (ai->ai_family == AF_INET6) {
|
|
xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
|
|
addr, port,
|
|
la->rdomain == NULL ? "" : " rdomain ",
|
|
la->rdomain == NULL ? "" : la->rdomain,
|
|
laddr2);
|
|
} else {
|
|
xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
|
|
addr, port,
|
|
la->rdomain == NULL ? "" : " rdomain ",
|
|
la->rdomain == NULL ? "" : la->rdomain,
|
|
laddr2);
|
|
}
|
|
free(laddr2);
|
|
}
|
|
return laddr1;
|
|
}
|
|
|
|
void
|
|
dump_config(ServerOptions *o)
|
|
{
|
|
char *s;
|
|
u_int i;
|
|
|
|
/* these are usually at the top of the config */
|
|
for (i = 0; i < o->num_ports; i++)
|
|
printf("port %d\n", o->ports[i]);
|
|
dump_cfg_fmtint(sAddressFamily, o->address_family);
|
|
|
|
for (i = 0; i < o->num_listen_addrs; i++) {
|
|
s = format_listen_addrs(&o->listen_addrs[i]);
|
|
printf("%s", s);
|
|
free(s);
|
|
}
|
|
|
|
/* integer arguments */
|
|
#ifdef USE_PAM
|
|
dump_cfg_fmtint(sUsePAM, o->use_pam);
|
|
#endif
|
|
dump_cfg_int(sLoginGraceTime, o->login_grace_time);
|
|
dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
|
|
dump_cfg_int(sMaxAuthTries, o->max_authtries);
|
|
dump_cfg_int(sMaxSessions, o->max_sessions);
|
|
dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
|
|
dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
|
|
dump_cfg_int(sRequiredRSASize, o->required_rsa_size);
|
|
dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
|
|
dump_cfg_int(sUnusedConnectionTimeout, o->unused_connection_timeout);
|
|
|
|
/* formatted integer arguments */
|
|
dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
|
|
dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
|
|
dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
|
|
dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
|
|
dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
|
|
o->hostbased_uses_name_from_packet_only);
|
|
dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
|
|
#ifdef KRB5
|
|
dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
|
|
dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
|
|
dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
|
|
# ifdef USE_AFS
|
|
dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
|
|
# endif
|
|
#endif
|
|
#ifdef GSSAPI
|
|
dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
|
|
dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
|
|
#endif
|
|
dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
|
|
dump_cfg_fmtint(sKbdInteractiveAuthentication,
|
|
o->kbd_interactive_authentication);
|
|
dump_cfg_fmtint(sPrintMotd, o->print_motd);
|
|
#ifndef DISABLE_LASTLOG
|
|
dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
|
|
#endif
|
|
dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
|
|
dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
|
|
dump_cfg_fmtint(sPermitTTY, o->permit_tty);
|
|
dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
|
|
dump_cfg_fmtint(sStrictModes, o->strict_modes);
|
|
dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
|
|
dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
|
|
dump_cfg_fmtint(sCompression, o->compression);
|
|
dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
|
|
dump_cfg_fmtint(sUseDNS, o->use_dns);
|
|
dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
|
|
dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
|
|
dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
|
|
dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
|
|
dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
|
|
dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
|
|
dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
|
|
dump_cfg_fmtint(sUseBlacklist, o->use_blacklist);
|
|
|
|
/* string arguments */
|
|
dump_cfg_string(sPidFile, o->pid_file);
|
|
dump_cfg_string(sModuliFile, o->moduli_file);
|
|
dump_cfg_string(sXAuthLocation, o->xauth_location);
|
|
dump_cfg_string(sCiphers, o->ciphers);
|
|
dump_cfg_string(sMacs, o->macs);
|
|
dump_cfg_string(sBanner, o->banner);
|
|
dump_cfg_string(sForceCommand, o->adm_forced_command);
|
|
dump_cfg_string(sChrootDirectory, o->chroot_directory);
|
|
dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
|
|
dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
|
|
dump_cfg_string(sSecurityKeyProvider, o->sk_provider);
|
|
dump_cfg_string(sAuthorizedPrincipalsFile,
|
|
o->authorized_principals_file);
|
|
dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
|
|
? "none" : o->version_addendum);
|
|
dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
|
|
dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
|
|
dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
|
|
dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
|
|
dump_cfg_string(sHostKeyAgent, o->host_key_agent);
|
|
dump_cfg_string(sKexAlgorithms, o->kex_algorithms);
|
|
dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms);
|
|
dump_cfg_string(sHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
|
|
dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms);
|
|
dump_cfg_string(sPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
|
|
#if defined(__OpenBSD__) || defined(HAVE_SYS_SET_PROCESS_RDOMAIN)
|
|
dump_cfg_string(sRDomain, o->routing_domain);
|
|
#endif
|
|
|
|
/* string arguments requiring a lookup */
|
|
dump_cfg_string(sLogLevel, log_level_name(o->log_level));
|
|
dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
|
|
|
|
/* string array arguments */
|
|
dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
|
|
o->authorized_keys_files);
|
|
dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
|
|
o->host_key_files);
|
|
dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
|
|
o->host_cert_files);
|
|
dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
|
|
dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
|
|
dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
|
|
dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
|
|
dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
|
|
dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv);
|
|
dump_cfg_strarray_oneline(sAuthenticationMethods,
|
|
o->num_auth_methods, o->auth_methods);
|
|
dump_cfg_strarray_oneline(sLogVerbose,
|
|
o->num_log_verbose, o->log_verbose);
|
|
dump_cfg_strarray_oneline(sChannelTimeout,
|
|
o->num_channel_timeouts, o->channel_timeouts);
|
|
|
|
/* other arguments */
|
|
for (i = 0; i < o->num_subsystems; i++)
|
|
printf("subsystem %s %s\n", o->subsystem_name[i],
|
|
o->subsystem_args[i]);
|
|
|
|
printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
|
|
o->max_startups_rate, o->max_startups);
|
|
printf("persourcemaxstartups ");
|
|
if (o->per_source_max_startups == INT_MAX)
|
|
printf("none\n");
|
|
else
|
|
printf("%d\n", o->per_source_max_startups);
|
|
printf("persourcenetblocksize %d:%d\n", o->per_source_masklen_ipv4,
|
|
o->per_source_masklen_ipv6);
|
|
|
|
s = NULL;
|
|
for (i = 0; tunmode_desc[i].val != -1; i++) {
|
|
if (tunmode_desc[i].val == o->permit_tun) {
|
|
s = tunmode_desc[i].text;
|
|
break;
|
|
}
|
|
}
|
|
dump_cfg_string(sPermitTunnel, s);
|
|
|
|
printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
|
|
printf("%s\n", iptos2str(o->ip_qos_bulk));
|
|
|
|
printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
|
|
o->rekey_interval);
|
|
|
|
printf("permitopen");
|
|
if (o->num_permitted_opens == 0)
|
|
printf(" any");
|
|
else {
|
|
for (i = 0; i < o->num_permitted_opens; i++)
|
|
printf(" %s", o->permitted_opens[i]);
|
|
}
|
|
printf("\n");
|
|
printf("permitlisten");
|
|
if (o->num_permitted_listens == 0)
|
|
printf(" any");
|
|
else {
|
|
for (i = 0; i < o->num_permitted_listens; i++)
|
|
printf(" %s", o->permitted_listens[i]);
|
|
}
|
|
printf("\n");
|
|
|
|
if (o->permit_user_env_allowlist == NULL) {
|
|
dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
|
|
} else {
|
|
printf("permituserenvironment %s\n",
|
|
o->permit_user_env_allowlist);
|
|
}
|
|
|
|
printf("pubkeyauthoptions");
|
|
if (o->pubkey_auth_options == 0)
|
|
printf(" none");
|
|
if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED)
|
|
printf(" touch-required");
|
|
if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED)
|
|
printf(" verify-required");
|
|
printf("\n");
|
|
}
|