blob: 7206043941f7af270f1c8986fe69e7952e217c7c [file] [log] [blame]
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001/*
Damien Miller95def091999-11-25 00:26:21 +11002 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved
Damien Miller95def091999-11-25 00:26:21 +11005 * Ssh client program. This program can be used to log into a remote machine.
6 * The software supports strong authentication, encryption, and forwarding
7 * of X11, TCP/IP, and authentication connections.
8 *
Damien Millere4340be2000-09-16 13:29:08 +11009 * As far as I am concerned, the code I have written for this software
10 * can be used freely for any purpose. Any derived versions of this
11 * software must be clearly marked as such, and if the derived work is
12 * incompatible with the protocol description in the RFC file, it must be
13 * called by a name other than "ssh" or "Secure Shell".
14 *
15 * Copyright (c) 1999 Niels Provos. All rights reserved.
Ben Lindstromeb041dc2002-03-27 17:20:38 +000016 * Copyright (c) 2000, 2001, 2002 Markus Friedl. All rights reserved.
Damien Millere4340be2000-09-16 13:29:08 +110017 *
18 * Modified to work with SSL by Niels Provos <provos@citi.umich.edu>
19 * in Canada (German citizen).
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
23 * are met:
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
33 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
39 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Damien Miller95def091999-11-25 00:26:21 +110040 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100041
42#include "includes.h"
Damien Miller9f1e33a2003-02-24 11:57:32 +110043RCSID("$OpenBSD: ssh.c,v 1.190 2003/02/06 09:27:29 markus Exp $");
Damien Millereba71ba2000-04-29 23:57:08 +100044
45#include <openssl/evp.h>
Damien Miller0bc1bd82000-11-13 22:57:25 +110046#include <openssl/err.h>
Damien Millerd4a8b7e1999-10-27 13:42:43 +100047
Damien Millerd4a8b7e1999-10-27 13:42:43 +100048#include "ssh.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000049#include "ssh1.h"
Damien Miller1383bd82000-04-06 12:32:37 +100050#include "ssh2.h"
51#include "compat.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000052#include "cipher.h"
53#include "xmalloc.h"
54#include "packet.h"
55#include "buffer.h"
Ben Lindstromc7637672001-06-09 00:36:26 +000056#include "channels.h"
Damien Millereba71ba2000-04-29 23:57:08 +100057#include "key.h"
Damien Miller994cf142000-07-21 10:19:44 +100058#include "authfd.h"
Damien Millereba71ba2000-04-29 23:57:08 +100059#include "authfile.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000060#include "pathnames.h"
Ben Lindstrombf555ba2001-01-18 02:04:35 +000061#include "clientloop.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000062#include "log.h"
63#include "readconf.h"
64#include "sshconnect.h"
65#include "tildexpand.h"
Ben Lindstrom1e7d3062001-02-09 02:36:43 +000066#include "dispatch.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000067#include "misc.h"
Ben Lindstrom06b33aa2001-02-15 03:01:59 +000068#include "kex.h"
69#include "mac.h"
Ben Lindstromae8e2d32001-04-14 23:13:02 +000070#include "sshtty.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100071
Ben Lindstromc5b68002001-07-04 04:52:03 +000072#ifdef SMARTCARD
Ben Lindstromc5b68002001-07-04 04:52:03 +000073#include "scard.h"
Ben Lindstrombcc18082001-08-06 21:59:25 +000074#endif
Ben Lindstromc5b68002001-07-04 04:52:03 +000075
Damien Miller3f905871999-11-15 17:10:57 +110076#ifdef HAVE___PROGNAME
77extern char *__progname;
Ben Lindstrom49a79c02000-11-17 03:47:20 +000078#else
79char *__progname;
80#endif
Damien Miller3f905871999-11-15 17:10:57 +110081
Damien Miller34132e52000-01-14 15:45:46 +110082/* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
83 Default value is AF_UNSPEC means both IPv4 and IPv6. */
Damien Miller7d80e342000-01-19 14:36:49 +110084#ifdef IPV4_DEFAULT
85int IPv4or6 = AF_INET;
86#else
Damien Miller34132e52000-01-14 15:45:46 +110087int IPv4or6 = AF_UNSPEC;
Damien Miller7d80e342000-01-19 14:36:49 +110088#endif
Damien Miller34132e52000-01-14 15:45:46 +110089
Damien Miller95def091999-11-25 00:26:21 +110090/* Flag indicating whether debug mode is on. This can be set on the command line. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100091int debug_flag = 0;
92
Damien Miller78928792000-04-12 20:17:38 +100093/* Flag indicating whether a tty should be allocated */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100094int tty_flag = 0;
Ben Lindstrom4dccfa52000-12-28 16:40:05 +000095int no_tty_flag = 0;
96int force_tty_flag = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100097
Damien Miller1383bd82000-04-06 12:32:37 +100098/* don't exec a shell */
99int no_shell_flag = 0;
Damien Miller1383bd82000-04-06 12:32:37 +1000100
Damien Miller5428f641999-11-25 11:54:57 +1100101/*
102 * Flag indicating that nothing should be read from stdin. This can be set
103 * on the command line.
104 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000105int stdin_null_flag = 0;
106
Damien Miller5428f641999-11-25 11:54:57 +1100107/*
108 * Flag indicating that ssh should fork after authentication. This is useful
Ben Lindstromf666fec2002-06-06 19:51:58 +0000109 * so that the passphrase can be entered manually, and then ssh goes to the
Damien Miller5428f641999-11-25 11:54:57 +1100110 * background.
111 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000112int fork_after_authentication_flag = 0;
113
Damien Miller5428f641999-11-25 11:54:57 +1100114/*
115 * General data structure for command line options and options configurable
116 * in configuration files. See readconf.h.
117 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000118Options options;
119
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000120/* optional user configfile */
121char *config = NULL;
122
Damien Miller5428f641999-11-25 11:54:57 +1100123/*
124 * Name of the host we are connecting to. This is the name given on the
125 * command line, or the HostName specified for the user-supplied name in a
126 * configuration file.
127 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000128char *host;
129
130/* socket address the host resolves to */
Damien Miller34132e52000-01-14 15:45:46 +1100131struct sockaddr_storage hostaddr;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000132
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000133/* Private host keys. */
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000134Sensitive sensitive_data;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000135
136/* Original real UID. */
137uid_t original_real_uid;
Ben Lindstromf9c48842002-06-11 16:37:51 +0000138uid_t original_effective_uid;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000139
Damien Miller1383bd82000-04-06 12:32:37 +1000140/* command to be executed */
141Buffer command;
142
Damien Miller832562e2001-01-30 09:30:01 +1100143/* Should we execute a command or invoke a subsystem? */
144int subsystem_flag = 0;
145
Damien Miller2797f7f2002-04-23 21:09:44 +1000146/* # of replies received for global requests */
147static int client_global_request_id = 0;
148
Damien Miller8c4e18a2002-09-19 12:05:02 +1000149/* pid of proxycommand child process */
150pid_t proxy_command_pid = 0;
151
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000152/* Prints a help message to the user. This function never returns. */
153
Ben Lindstrombba81212001-06-25 05:01:22 +0000154static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000155usage(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000156{
Kevin Stevesec84dc12000-12-13 17:45:15 +0000157 fprintf(stderr, "Usage: %s [options] host [command]\n", __progname);
Damien Miller95def091999-11-25 00:26:21 +1100158 fprintf(stderr, "Options:\n");
159 fprintf(stderr, " -l user Log in using this user name.\n");
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000160 fprintf(stderr, " -n Redirect input from " _PATH_DEVNULL ".\n");
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000161 fprintf(stderr, " -F config Config file (default: ~/%s).\n",
162 _PATH_SSH_USER_CONFFILE);
Damien Millerb1715dc2000-05-30 13:44:51 +1000163 fprintf(stderr, " -A Enable authentication agent forwarding.\n");
Ben Lindstrom3b89c5e2001-06-05 20:44:16 +0000164 fprintf(stderr, " -a Disable authentication agent forwarding (default).\n");
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000165#ifdef AFS
Damien Miller95def091999-11-25 00:26:21 +1100166 fprintf(stderr, " -k Disable Kerberos ticket and AFS token forwarding.\n");
167#endif /* AFS */
Kevin Stevesef4eea92001-02-05 12:42:17 +0000168 fprintf(stderr, " -X Enable X11 connection forwarding.\n");
Ben Lindstrom3b89c5e2001-06-05 20:44:16 +0000169 fprintf(stderr, " -x Disable X11 connection forwarding (default).\n");
Ben Lindstrom0ab2a012001-03-05 06:45:21 +0000170 fprintf(stderr, " -i file Identity for public key authentication "
171 "(default: ~/.ssh/identity)\n");
Ben Lindstrom61eb9562001-08-06 21:53:42 +0000172#ifdef SMARTCARD
173 fprintf(stderr, " -I reader Set smartcard reader.\n");
Ben Lindstrombcc18082001-08-06 21:59:25 +0000174#endif
Damien Miller95def091999-11-25 00:26:21 +1100175 fprintf(stderr, " -t Tty; allocate a tty even if command is given.\n");
Damien Miller1383bd82000-04-06 12:32:37 +1000176 fprintf(stderr, " -T Do not allocate a tty.\n");
Damien Miller95def091999-11-25 00:26:21 +1100177 fprintf(stderr, " -v Verbose; display verbose debugging messages.\n");
Damien Millere4340be2000-09-16 13:29:08 +1100178 fprintf(stderr, " Multiple -v increases verbosity.\n");
Damien Miller95def091999-11-25 00:26:21 +1100179 fprintf(stderr, " -V Display version number only.\n");
Damien Miller95def091999-11-25 00:26:21 +1100180 fprintf(stderr, " -q Quiet; don't display any warning messages.\n");
181 fprintf(stderr, " -f Fork into background after authentication.\n");
182 fprintf(stderr, " -e char Set escape character; ``none'' = disable (default: ~).\n");
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000183
Ben Lindstrom3b89c5e2001-06-05 20:44:16 +0000184 fprintf(stderr, " -c cipher Select encryption algorithm\n");
Ben Lindstrom3d73a342001-03-05 07:39:01 +0000185 fprintf(stderr, " -m macs Specify MAC algorithms for protocol version 2.\n");
Damien Miller95def091999-11-25 00:26:21 +1100186 fprintf(stderr, " -p port Connect to this port. Server must be on the same port.\n");
187 fprintf(stderr, " -L listen-port:host:port Forward local port to remote address\n");
188 fprintf(stderr, " -R listen-port:host:port Forward remote port to local address\n");
Kevin Stevesec84dc12000-12-13 17:45:15 +0000189 fprintf(stderr, " These cause %s to listen for connections on a port, and\n", __progname);
Damien Miller95def091999-11-25 00:26:21 +1100190 fprintf(stderr, " forward them to the other side by connecting to host:port.\n");
Ben Lindstrom19ceb172001-09-12 17:54:24 +0000191 fprintf(stderr, " -D port Enable dynamic application-level port forwarding.\n");
Damien Miller95def091999-11-25 00:26:21 +1100192 fprintf(stderr, " -C Enable compression.\n");
Damien Miller1383bd82000-04-06 12:32:37 +1000193 fprintf(stderr, " -N Do not execute a shell or command.\n");
Damien Miller95def091999-11-25 00:26:21 +1100194 fprintf(stderr, " -g Allow remote hosts to connect to forwarded ports.\n");
Ben Lindstrom1e7d3062001-02-09 02:36:43 +0000195 fprintf(stderr, " -1 Force protocol version 1.\n");
196 fprintf(stderr, " -2 Force protocol version 2.\n");
Damien Miller34132e52000-01-14 15:45:46 +1100197 fprintf(stderr, " -4 Use IPv4 only.\n");
198 fprintf(stderr, " -6 Use IPv6 only.\n");
Damien Miller95def091999-11-25 00:26:21 +1100199 fprintf(stderr, " -o 'option' Process the option as if it was read from a configuration file.\n");
Damien Miller832562e2001-01-30 09:30:01 +1100200 fprintf(stderr, " -s Invoke command (mandatory) as SSH2 subsystem.\n");
Ben Lindstrom3b89c5e2001-06-05 20:44:16 +0000201 fprintf(stderr, " -b addr Local IP address.\n");
Damien Miller95def091999-11-25 00:26:21 +1100202 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000203}
204
Ben Lindstrombba81212001-06-25 05:01:22 +0000205static int ssh_session(void);
206static int ssh_session2(void);
207static void load_public_identity_files(void);
Damien Miller1383bd82000-04-06 12:32:37 +1000208
Damien Miller95def091999-11-25 00:26:21 +1100209/*
210 * Main program for the ssh client.
211 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000212int
213main(int ac, char **av)
214{
Ben Lindstrom24157572002-06-12 16:09:39 +0000215 int i, opt, exit_status;
Damien Milleraae6c611999-12-06 11:47:28 +1100216 u_short fwd_port, fwd_host_port;
Ben Lindstrom1a174712001-09-12 17:56:15 +0000217 char sfwd_port[6], sfwd_host_port[6];
Damien Millerf4614452001-07-14 12:18:10 +1000218 char *p, *cp, buf[256];
Damien Miller95def091999-11-25 00:26:21 +1100219 struct stat st;
Ben Lindstrom086cf212001-03-05 05:56:40 +0000220 struct passwd *pw;
Damien Miller1383bd82000-04-06 12:32:37 +1000221 int dummy;
Ben Lindstrom5ccf63a2001-09-24 20:00:10 +0000222 extern int optind, optreset;
Damien Miller4f8e6692001-07-14 13:22:53 +1000223 extern char *optarg;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000224
Ben Lindstrom49a79c02000-11-17 03:47:20 +0000225 __progname = get_progname(av[0]);
Damien Millerf9b625c2000-07-09 22:42:32 +1000226 init_rng();
227
Damien Miller5428f641999-11-25 11:54:57 +1100228 /*
229 * Save the original real uid. It will be needed later (uid-swapping
230 * may clobber the real uid).
231 */
Damien Miller95def091999-11-25 00:26:21 +1100232 original_real_uid = getuid();
233 original_effective_uid = geteuid();
Damien Miller50b9a602002-09-04 16:50:06 +1000234
235 /*
236 * Use uid-swapping to give up root privileges for the duration of
237 * option processing. We will re-instantiate the rights when we are
238 * ready to create the privileged port, and will permanently drop
239 * them when the port has been created (actually, when the connection
240 * has been made, as we may need to create the port several times).
241 */
242 PRIV_END;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000243
Damien Miller05dd7952000-10-01 00:42:48 +1100244#ifdef HAVE_SETRLIMIT
Damien Miller95def091999-11-25 00:26:21 +1100245 /* If we are installed setuid root be careful to not drop core. */
246 if (original_real_uid != original_effective_uid) {
247 struct rlimit rlim;
248 rlim.rlim_cur = rlim.rlim_max = 0;
249 if (setrlimit(RLIMIT_CORE, &rlim) < 0)
250 fatal("setrlimit failed: %.100s", strerror(errno));
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000251 }
Damien Millerbac2d8a2000-09-05 16:13:06 +1100252#endif
Ben Lindstrom3fcf1a22001-04-08 18:26:59 +0000253 /* Get user data. */
254 pw = getpwuid(original_real_uid);
255 if (!pw) {
256 log("You don't exist, go away!");
257 exit(1);
258 }
259 /* Take a copy of the returned structure. */
260 pw = pwcopy(pw);
261
Damien Miller5428f641999-11-25 11:54:57 +1100262 /*
Damien Miller5428f641999-11-25 11:54:57 +1100263 * Set our umask to something reasonable, as some files are created
264 * with the default umask. This will make them world-readable but
265 * writable only by the owner, which is ok for all files for which we
266 * don't set the modes explicitly.
267 */
Damien Miller95def091999-11-25 00:26:21 +1100268 umask(022);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000269
Damien Miller95def091999-11-25 00:26:21 +1100270 /* Initialize option structure to indicate that no values have been set. */
271 initialize_options(&options);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000272
Damien Miller95def091999-11-25 00:26:21 +1100273 /* Parse command-line arguments. */
274 host = NULL;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000275
Damien Millerf4614452001-07-14 12:18:10 +1000276again:
277 while ((opt = getopt(ac, av,
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000278 "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:NPR:TVX")) != -1) {
Damien Miller95def091999-11-25 00:26:21 +1100279 switch (opt) {
Ben Lindstrom1e7d3062001-02-09 02:36:43 +0000280 case '1':
281 options.protocol = SSH_PROTO_1;
282 break;
Damien Miller4af51302000-04-16 11:18:38 +1000283 case '2':
284 options.protocol = SSH_PROTO_2;
285 break;
Damien Miller34132e52000-01-14 15:45:46 +1100286 case '4':
287 IPv4or6 = AF_INET;
288 break;
Damien Miller34132e52000-01-14 15:45:46 +1100289 case '6':
290 IPv4or6 = AF_INET6;
291 break;
Damien Miller95def091999-11-25 00:26:21 +1100292 case 'n':
293 stdin_null_flag = 1;
294 break;
Damien Miller95def091999-11-25 00:26:21 +1100295 case 'f':
296 fork_after_authentication_flag = 1;
297 stdin_null_flag = 1;
298 break;
Damien Miller95def091999-11-25 00:26:21 +1100299 case 'x':
300 options.forward_x11 = 0;
301 break;
Damien Miller95def091999-11-25 00:26:21 +1100302 case 'X':
303 options.forward_x11 = 1;
304 break;
Damien Miller95def091999-11-25 00:26:21 +1100305 case 'g':
306 options.gateway_ports = 1;
307 break;
Damien Miller147bba32002-09-04 16:46:06 +1000308 case 'P': /* deprecated */
Damien Miller95def091999-11-25 00:26:21 +1100309 options.use_privileged_port = 0;
310 break;
Damien Miller95def091999-11-25 00:26:21 +1100311 case 'a':
312 options.forward_agent = 0;
313 break;
Damien Millerb1715dc2000-05-30 13:44:51 +1000314 case 'A':
315 options.forward_agent = 1;
316 break;
Damien Miller95def091999-11-25 00:26:21 +1100317#ifdef AFS
318 case 'k':
319 options.kerberos_tgt_passing = 0;
320 options.afs_token_passing = 0;
321 break;
322#endif
323 case 'i':
324 if (stat(optarg, &st) < 0) {
Damien Millerf4614452001-07-14 12:18:10 +1000325 fprintf(stderr, "Warning: Identity file %s "
326 "does not exist.\n", optarg);
Damien Miller95def091999-11-25 00:26:21 +1100327 break;
328 }
Damien Millerf4614452001-07-14 12:18:10 +1000329 if (options.num_identity_files >=
330 SSH_MAX_IDENTITY_FILES)
331 fatal("Too many identity files specified "
332 "(max %d)", SSH_MAX_IDENTITY_FILES);
333 options.identity_files[options.num_identity_files++] =
334 xstrdup(optarg);
Damien Miller95def091999-11-25 00:26:21 +1100335 break;
Ben Lindstromc5b68002001-07-04 04:52:03 +0000336 case 'I':
337#ifdef SMARTCARD
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000338 options.smartcard_device = xstrdup(optarg);
Ben Lindstrombcc18082001-08-06 21:59:25 +0000339#else
Ben Lindstromc5b68002001-07-04 04:52:03 +0000340 fprintf(stderr, "no support for smartcards.\n");
Ben Lindstrombcc18082001-08-06 21:59:25 +0000341#endif
Ben Lindstromc5b68002001-07-04 04:52:03 +0000342 break;
Damien Miller95def091999-11-25 00:26:21 +1100343 case 't':
Ben Lindstrom4dccfa52000-12-28 16:40:05 +0000344 if (tty_flag)
345 force_tty_flag = 1;
Damien Miller95def091999-11-25 00:26:21 +1100346 tty_flag = 1;
347 break;
Damien Miller95def091999-11-25 00:26:21 +1100348 case 'v':
Damien Millere4340be2000-09-16 13:29:08 +1100349 if (0 == debug_flag) {
350 debug_flag = 1;
351 options.log_level = SYSLOG_LEVEL_DEBUG1;
352 } else if (options.log_level < SYSLOG_LEVEL_DEBUG3) {
353 options.log_level++;
354 break;
Damien Millerf4614452001-07-14 12:18:10 +1000355 } else
Ben Lindstrom6df8ef42001-03-05 07:47:23 +0000356 fatal("Too high debugging level.");
Damien Millere4340be2000-09-16 13:29:08 +1100357 /* fallthrough */
Damien Miller95def091999-11-25 00:26:21 +1100358 case 'V':
Damien Miller225736c2001-02-19 21:51:08 +1100359 fprintf(stderr,
360 "%s, SSH protocols %d.%d/%d.%d, OpenSSL 0x%8.8lx\n",
Damien Miller78928792000-04-12 20:17:38 +1000361 SSH_VERSION,
362 PROTOCOL_MAJOR_1, PROTOCOL_MINOR_1,
Damien Miller225736c2001-02-19 21:51:08 +1100363 PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2,
364 SSLeay());
Damien Miller95def091999-11-25 00:26:21 +1100365 if (opt == 'V')
366 exit(0);
Damien Miller95def091999-11-25 00:26:21 +1100367 break;
Damien Miller95def091999-11-25 00:26:21 +1100368 case 'q':
369 options.log_level = SYSLOG_LEVEL_QUIET;
370 break;
Damien Miller95def091999-11-25 00:26:21 +1100371 case 'e':
372 if (optarg[0] == '^' && optarg[2] == 0 &&
Damien Millerf4614452001-07-14 12:18:10 +1000373 (u_char) optarg[1] >= 64 &&
374 (u_char) optarg[1] < 128)
Ben Lindstrom46c16222000-12-22 01:43:59 +0000375 options.escape_char = (u_char) optarg[1] & 31;
Damien Miller95def091999-11-25 00:26:21 +1100376 else if (strlen(optarg) == 1)
Ben Lindstrom46c16222000-12-22 01:43:59 +0000377 options.escape_char = (u_char) optarg[0];
Damien Miller95def091999-11-25 00:26:21 +1100378 else if (strcmp(optarg, "none") == 0)
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +0000379 options.escape_char = SSH_ESCAPECHAR_NONE;
Damien Miller95def091999-11-25 00:26:21 +1100380 else {
Damien Millerf4614452001-07-14 12:18:10 +1000381 fprintf(stderr, "Bad escape character '%s'.\n",
382 optarg);
Damien Miller95def091999-11-25 00:26:21 +1100383 exit(1);
384 }
385 break;
Damien Miller95def091999-11-25 00:26:21 +1100386 case 'c':
Damien Millereba71ba2000-04-29 23:57:08 +1000387 if (ciphers_valid(optarg)) {
388 /* SSH2 only */
389 options.ciphers = xstrdup(optarg);
Damien Miller30c3d422000-05-09 11:02:59 +1000390 options.cipher = SSH_CIPHER_ILLEGAL;
Damien Millereba71ba2000-04-29 23:57:08 +1000391 } else {
392 /* SSH1 only */
Damien Millere39cacc2000-11-29 12:18:44 +1100393 options.cipher = cipher_number(optarg);
394 if (options.cipher == -1) {
Damien Millerf4614452001-07-14 12:18:10 +1000395 fprintf(stderr,
396 "Unknown cipher type '%s'\n",
397 optarg);
Damien Millereba71ba2000-04-29 23:57:08 +1000398 exit(1);
399 }
Damien Millerf4614452001-07-14 12:18:10 +1000400 if (options.cipher == SSH_CIPHER_3DES)
Damien Millere39cacc2000-11-29 12:18:44 +1100401 options.ciphers = "3des-cbc";
Damien Millerf4614452001-07-14 12:18:10 +1000402 else if (options.cipher == SSH_CIPHER_BLOWFISH)
Damien Millere39cacc2000-11-29 12:18:44 +1100403 options.ciphers = "blowfish-cbc";
Damien Millerf4614452001-07-14 12:18:10 +1000404 else
Damien Millere39cacc2000-11-29 12:18:44 +1100405 options.ciphers = (char *)-1;
Damien Miller95def091999-11-25 00:26:21 +1100406 }
407 break;
Ben Lindstrom06b33aa2001-02-15 03:01:59 +0000408 case 'm':
409 if (mac_valid(optarg))
410 options.macs = xstrdup(optarg);
411 else {
Damien Millerf4614452001-07-14 12:18:10 +1000412 fprintf(stderr, "Unknown mac type '%s'\n",
413 optarg);
Ben Lindstrom06b33aa2001-02-15 03:01:59 +0000414 exit(1);
415 }
416 break;
Damien Miller95def091999-11-25 00:26:21 +1100417 case 'p':
Ben Lindstrom19066a12001-04-12 23:39:26 +0000418 options.port = a2port(optarg);
419 if (options.port == 0) {
Ben Lindstrom146edb92001-04-11 23:06:28 +0000420 fprintf(stderr, "Bad port '%s'\n", optarg);
421 exit(1);
422 }
Damien Miller95def091999-11-25 00:26:21 +1100423 break;
Damien Miller95def091999-11-25 00:26:21 +1100424 case 'l':
425 options.user = optarg;
426 break;
Ben Lindstrom1a174712001-09-12 17:56:15 +0000427
Damien Miller95def091999-11-25 00:26:21 +1100428 case 'L':
Ben Lindstrom1a174712001-09-12 17:56:15 +0000429 case 'R':
430 if (sscanf(optarg, "%5[0-9]:%255[^:]:%5[0-9]",
431 sfwd_port, buf, sfwd_host_port) != 3 &&
432 sscanf(optarg, "%5[0-9]/%255[^/]/%5[0-9]",
433 sfwd_port, buf, sfwd_host_port) != 3) {
Damien Millerf4614452001-07-14 12:18:10 +1000434 fprintf(stderr,
Ben Lindstrom1a174712001-09-12 17:56:15 +0000435 "Bad forwarding specification '%s'\n",
Damien Millerf4614452001-07-14 12:18:10 +1000436 optarg);
Damien Miller95def091999-11-25 00:26:21 +1100437 usage();
438 /* NOTREACHED */
439 }
Ben Lindstrom1a174712001-09-12 17:56:15 +0000440 if ((fwd_port = a2port(sfwd_port)) == 0 ||
Ben Lindstrom6328ab32002-03-22 02:54:23 +0000441 (fwd_host_port = a2port(sfwd_host_port)) == 0) {
Ben Lindstrom1a174712001-09-12 17:56:15 +0000442 fprintf(stderr,
443 "Bad forwarding port(s) '%s'\n", optarg);
444 exit(1);
445 }
446 if (opt == 'L')
447 add_local_forward(&options, fwd_port, buf,
448 fwd_host_port);
449 else if (opt == 'R')
450 add_remote_forward(&options, fwd_port, buf,
Damien Miller9f0f5c62001-12-21 14:45:46 +1100451 fwd_host_port);
Damien Miller95def091999-11-25 00:26:21 +1100452 break;
Ben Lindstrom3bb4f9d2001-04-08 18:30:26 +0000453
454 case 'D':
Ben Lindstrom19066a12001-04-12 23:39:26 +0000455 fwd_port = a2port(optarg);
456 if (fwd_port == 0) {
Damien Millerf4614452001-07-14 12:18:10 +1000457 fprintf(stderr, "Bad dynamic port '%s'\n",
458 optarg);
Ben Lindstrom146edb92001-04-11 23:06:28 +0000459 exit(1);
460 }
Ben Lindstrom3bb4f9d2001-04-08 18:30:26 +0000461 add_local_forward(&options, fwd_port, "socks4", 0);
462 break;
463
Damien Miller95def091999-11-25 00:26:21 +1100464 case 'C':
465 options.compression = 1;
466 break;
Damien Miller1383bd82000-04-06 12:32:37 +1000467 case 'N':
468 no_shell_flag = 1;
469 no_tty_flag = 1;
470 break;
Damien Miller1383bd82000-04-06 12:32:37 +1000471 case 'T':
472 no_tty_flag = 1;
473 break;
Damien Miller95def091999-11-25 00:26:21 +1100474 case 'o':
475 dummy = 1;
Damien Millerf4614452001-07-14 12:18:10 +1000476 if (process_config_line(&options, host ? host : "",
477 optarg, "command-line", 0, &dummy) != 0)
Damien Miller95def091999-11-25 00:26:21 +1100478 exit(1);
479 break;
Damien Miller832562e2001-01-30 09:30:01 +1100480 case 's':
481 subsystem_flag = 1;
482 break;
Ben Lindstrome0f88042001-04-30 13:06:24 +0000483 case 'b':
484 options.bind_address = optarg;
485 break;
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000486 case 'F':
487 config = optarg;
488 break;
Damien Miller95def091999-11-25 00:26:21 +1100489 default:
490 usage();
491 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000492 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000493
Damien Millerf4614452001-07-14 12:18:10 +1000494 ac -= optind;
495 av += optind;
496
497 if (ac > 0 && !host && **av != '-') {
Ben Lindstromc276c122002-12-23 02:14:51 +0000498 if (strrchr(*av, '@')) {
Damien Millerf4614452001-07-14 12:18:10 +1000499 p = xstrdup(*av);
Ben Lindstromc276c122002-12-23 02:14:51 +0000500 cp = strrchr(p, '@');
Damien Millerf4614452001-07-14 12:18:10 +1000501 if (cp == NULL || cp == p)
502 usage();
503 options.user = p;
504 *cp = '\0';
505 host = ++cp;
506 } else
507 host = *av;
Ben Lindstromb9fa6912002-12-23 02:24:54 +0000508 if (ac > 1) {
509 optind = optreset = 1;
Damien Millerf4614452001-07-14 12:18:10 +1000510 goto again;
511 }
Ben Lindstromb9fa6912002-12-23 02:24:54 +0000512 ac--, av++;
Damien Millerf4614452001-07-14 12:18:10 +1000513 }
514
Damien Miller95def091999-11-25 00:26:21 +1100515 /* Check that we got a host name. */
516 if (!host)
517 usage();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000518
Damien Millercb5e44a2000-09-29 12:12:36 +1100519 SSLeay_add_all_algorithms();
Damien Miller0bc1bd82000-11-13 22:57:25 +1100520 ERR_load_crypto_strings();
Ben Lindstrom908afed2001-10-03 17:34:59 +0000521 channel_set_af(IPv4or6);
Damien Millercb5e44a2000-09-29 12:12:36 +1100522
Damien Miller95def091999-11-25 00:26:21 +1100523 /* Initialize the command to execute on remote host. */
524 buffer_init(&command);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000525
Damien Miller5428f641999-11-25 11:54:57 +1100526 /*
527 * Save the command to execute on the remote host in a buffer. There
528 * is no limit on the length of the command, except by the maximum
529 * packet size. Also sets the tty flag if there is no command.
530 */
Damien Millerf4614452001-07-14 12:18:10 +1000531 if (!ac) {
Damien Miller95def091999-11-25 00:26:21 +1100532 /* No command specified - execute shell on a tty. */
533 tty_flag = 1;
Damien Miller832562e2001-01-30 09:30:01 +1100534 if (subsystem_flag) {
Damien Millerf4614452001-07-14 12:18:10 +1000535 fprintf(stderr,
536 "You must specify a subsystem to invoke.\n");
Damien Miller832562e2001-01-30 09:30:01 +1100537 usage();
538 }
Damien Miller95def091999-11-25 00:26:21 +1100539 } else {
Damien Millerf4614452001-07-14 12:18:10 +1000540 /* A command has been specified. Store it into the buffer. */
541 for (i = 0; i < ac; i++) {
542 if (i)
Damien Miller95def091999-11-25 00:26:21 +1100543 buffer_append(&command, " ", 1);
544 buffer_append(&command, av[i], strlen(av[i]));
545 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000546 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000547
Damien Miller95def091999-11-25 00:26:21 +1100548 /* Cannot fork to background if no command. */
Damien Millercaf6dd62000-08-29 11:33:50 +1100549 if (fork_after_authentication_flag && buffer_len(&command) == 0 && !no_shell_flag)
Damien Miller95def091999-11-25 00:26:21 +1100550 fatal("Cannot fork into background without a command to execute.");
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000551
Damien Miller95def091999-11-25 00:26:21 +1100552 /* Allocate a tty by default if no command specified. */
553 if (buffer_len(&command) == 0)
554 tty_flag = 1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000555
Ben Lindstroma962c2f2002-07-04 00:14:17 +0000556 /* Force no tty */
Ben Lindstromc72745a2000-12-02 19:03:54 +0000557 if (no_tty_flag)
558 tty_flag = 0;
Damien Miller95def091999-11-25 00:26:21 +1100559 /* Do not allocate a tty if stdin is not a tty. */
Ben Lindstrom4dccfa52000-12-28 16:40:05 +0000560 if (!isatty(fileno(stdin)) && !force_tty_flag) {
Damien Miller95def091999-11-25 00:26:21 +1100561 if (tty_flag)
Ben Lindstrom6df8ef42001-03-05 07:47:23 +0000562 log("Pseudo-terminal will not be allocated because stdin is not a terminal.");
Damien Miller95def091999-11-25 00:26:21 +1100563 tty_flag = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000564 }
Damien Miller1383bd82000-04-06 12:32:37 +1000565
Ben Lindstrom8a432f52001-03-05 07:24:46 +0000566 /*
567 * Initialize "log" output. Since we are the client all output
568 * actually goes to stderr.
569 */
Ben Lindstrom2b646522001-04-12 16:16:57 +0000570 log_init(av[0], options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level,
571 SYSLOG_FACILITY_USER, 1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000572
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000573 /*
574 * Read per-user configuration file. Ignore the system wide config
575 * file if the user specifies a config file on the command line.
576 */
577 if (config != NULL) {
Ben Lindstromedc0cf22001-09-12 18:32:20 +0000578 if (!read_config_file(config, host, &options))
579 fatal("Can't open user config file %.100s: "
580 "%.100s", config, strerror(errno));
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000581 } else {
582 snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir,
583 _PATH_SSH_USER_CONFFILE);
Ben Lindstromedc0cf22001-09-12 18:32:20 +0000584 (void)read_config_file(buf, host, &options);
Ben Lindstrom83f07d12001-10-03 17:22:29 +0000585
586 /* Read systemwide configuration file after use config. */
587 (void)read_config_file(_PATH_HOST_CONFIG_FILE, host, &options);
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000588 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000589
Damien Miller95def091999-11-25 00:26:21 +1100590 /* Fill configuration defaults. */
591 fill_default_options(&options);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000592
Damien Miller95def091999-11-25 00:26:21 +1100593 /* reinit */
Ben Lindstrom8a432f52001-03-05 07:24:46 +0000594 log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000595
Damien Miller60bc5172001-03-19 09:38:15 +1100596 seed_rng();
597
Damien Miller95def091999-11-25 00:26:21 +1100598 if (options.user == NULL)
599 options.user = xstrdup(pw->pw_name);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000600
Damien Miller95def091999-11-25 00:26:21 +1100601 if (options.hostname != NULL)
602 host = options.hostname;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000603
Damien Miller9f1e33a2003-02-24 11:57:32 +1100604 if (options.proxy_command != NULL &&
605 strcmp(options.proxy_command, "none") == 0)
606 options.proxy_command = NULL;
607
Damien Miller95def091999-11-25 00:26:21 +1100608 /* Disable rhosts authentication if not running as root. */
Damien Millerbac2d8a2000-09-05 16:13:06 +1100609#ifdef HAVE_CYGWIN
610 /* Ignore uid if running under Windows */
611 if (!options.use_privileged_port) {
612#else
Damien Miller95def091999-11-25 00:26:21 +1100613 if (original_effective_uid != 0 || !options.use_privileged_port) {
Damien Millerbac2d8a2000-09-05 16:13:06 +1100614#endif
Kevin Stevesfcec7f82000-12-15 19:55:48 +0000615 debug("Rhosts Authentication disabled, "
616 "originating port will not be trusted.");
Damien Miller95def091999-11-25 00:26:21 +1100617 options.rhosts_authentication = 0;
Damien Miller95def091999-11-25 00:26:21 +1100618 }
Kevin Stevesfcec7f82000-12-15 19:55:48 +0000619 /* Open a connection to the remote host. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000620
Ben Lindstrom24157572002-06-12 16:09:39 +0000621 if (ssh_connect(host, &hostaddr, options.port, IPv4or6,
Kevin Stevesfcec7f82000-12-15 19:55:48 +0000622 options.connection_attempts,
Ben Lindstrom1aa64272002-06-11 20:28:05 +0000623#ifdef HAVE_CYGWIN
624 options.use_privileged_port,
625#else
Ben Lindstromf9c48842002-06-11 16:37:51 +0000626 original_effective_uid == 0 && options.use_privileged_port,
Ben Lindstrom1aa64272002-06-11 20:28:05 +0000627#endif
Ben Lindstromda394ca2002-06-12 16:11:12 +0000628 options.proxy_command) != 0)
Ben Lindstrom24157572002-06-12 16:09:39 +0000629 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000630
Damien Miller5428f641999-11-25 11:54:57 +1100631 /*
632 * If we successfully made the connection, load the host private key
633 * in case we will need it later for combined rsa-rhosts
634 * authentication. This must be done before releasing extra
635 * privileges, because the file is only readable by root.
Ben Lindstrom9e5bb572002-06-06 19:58:27 +0000636 * If we cannot access the private keys, load the public keys
637 * instead and try to execute the ssh-keysign helper instead.
Damien Miller5428f641999-11-25 11:54:57 +1100638 */
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000639 sensitive_data.nkeys = 0;
640 sensitive_data.keys = NULL;
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000641 sensitive_data.external_keysign = 0;
Ben Lindstrom24157572002-06-12 16:09:39 +0000642 if (options.rhosts_rsa_authentication ||
643 options.hostbased_authentication) {
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000644 sensitive_data.nkeys = 3;
Ben Lindstroma962c2f2002-07-04 00:14:17 +0000645 sensitive_data.keys = xmalloc(sensitive_data.nkeys *
646 sizeof(Key));
Ben Lindstromf9c48842002-06-11 16:37:51 +0000647
648 PRIV_START;
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000649 sensitive_data.keys[0] = key_load_private_type(KEY_RSA1,
Ben Lindstromd0fca422001-03-26 13:44:06 +0000650 _PATH_HOST_KEY_FILE, "", NULL);
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000651 sensitive_data.keys[1] = key_load_private_type(KEY_DSA,
652 _PATH_HOST_DSA_KEY_FILE, "", NULL);
653 sensitive_data.keys[2] = key_load_private_type(KEY_RSA,
654 _PATH_HOST_RSA_KEY_FILE, "", NULL);
Ben Lindstromf9c48842002-06-11 16:37:51 +0000655 PRIV_END;
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000656
Ben Lindstrom5d35a2f2002-07-04 00:19:40 +0000657 if (options.hostbased_authentication == 1 &&
658 sensitive_data.keys[0] == NULL &&
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000659 sensitive_data.keys[1] == NULL &&
660 sensitive_data.keys[2] == NULL) {
661 sensitive_data.keys[1] = key_load_public(
662 _PATH_HOST_DSA_KEY_FILE, NULL);
663 sensitive_data.keys[2] = key_load_public(
664 _PATH_HOST_RSA_KEY_FILE, NULL);
665 sensitive_data.external_keysign = 1;
666 }
Damien Miller95def091999-11-25 00:26:21 +1100667 }
Damien Miller5428f641999-11-25 11:54:57 +1100668 /*
669 * Get rid of any extra privileges that we may have. We will no
670 * longer need them. Also, extra privileges could make it very hard
671 * to read identity files and other non-world-readable files from the
672 * user's home directory if it happens to be on a NFS volume where
673 * root is mapped to nobody.
674 */
Ben Lindstromf9c48842002-06-11 16:37:51 +0000675 seteuid(original_real_uid);
676 setuid(original_real_uid);
Damien Miller95def091999-11-25 00:26:21 +1100677
Damien Miller5428f641999-11-25 11:54:57 +1100678 /*
679 * Now that we are back to our own permissions, create ~/.ssh
680 * directory if it doesn\'t already exist.
681 */
Ben Lindstrom930b14a2001-08-15 23:19:21 +0000682 snprintf(buf, sizeof buf, "%.100s%s%.100s", pw->pw_dir, strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR);
Damien Miller95def091999-11-25 00:26:21 +1100683 if (stat(buf, &st) < 0)
Damien Millerbe484b52000-07-15 14:14:16 +1000684 if (mkdir(buf, 0700) < 0)
Damien Miller95def091999-11-25 00:26:21 +1100685 error("Could not create directory '%.200s'.", buf);
686
Ben Lindstrom266dfdf2001-03-09 00:12:22 +0000687 /* load options.identity_files */
688 load_public_identity_files();
689
690 /* Expand ~ in known host file names. */
691 /* XXX mem-leaks: */
Damien Miller0bc1bd82000-11-13 22:57:25 +1100692 options.system_hostfile =
693 tilde_expand_filename(options.system_hostfile, original_real_uid);
694 options.user_hostfile =
695 tilde_expand_filename(options.user_hostfile, original_real_uid);
696 options.system_hostfile2 =
697 tilde_expand_filename(options.system_hostfile2, original_real_uid);
698 options.user_hostfile2 =
699 tilde_expand_filename(options.user_hostfile2, original_real_uid);
Damien Miller95def091999-11-25 00:26:21 +1100700
Damien Miller07cd5892001-11-12 10:52:03 +1100701 signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */
702
Damien Miller95def091999-11-25 00:26:21 +1100703 /* Log into the remote system. This never returns if the login fails. */
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000704 ssh_login(&sensitive_data, host, (struct sockaddr *)&hostaddr, pw);
Damien Miller95def091999-11-25 00:26:21 +1100705
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000706 /* We no longer need the private host keys. Clear them now. */
707 if (sensitive_data.nkeys != 0) {
708 for (i = 0; i < sensitive_data.nkeys; i++) {
709 if (sensitive_data.keys[i] != NULL) {
710 /* Destroys contents safely */
711 debug3("clear hostkey %d", i);
712 key_free(sensitive_data.keys[i]);
713 sensitive_data.keys[i] = NULL;
714 }
715 }
716 xfree(sensitive_data.keys);
717 }
Ben Lindstroma6c8a8d2001-08-06 21:42:00 +0000718 for (i = 0; i < options.num_identity_files; i++) {
719 if (options.identity_files[i]) {
720 xfree(options.identity_files[i]);
721 options.identity_files[i] = NULL;
722 }
723 if (options.identity_keys[i]) {
724 key_free(options.identity_keys[i]);
725 options.identity_keys[i] = NULL;
726 }
727 }
Damien Miller95def091999-11-25 00:26:21 +1100728
Damien Miller1383bd82000-04-06 12:32:37 +1000729 exit_status = compat20 ? ssh_session2() : ssh_session();
730 packet_close();
Damien Miller8c4e18a2002-09-19 12:05:02 +1000731
732 /*
733 * Send SIGHUP to proxy command if used. We don't wait() in
734 * case it hangs and instead rely on init to reap the child
735 */
736 if (proxy_command_pid > 1)
737 kill(proxy_command_pid, SIGHUP);
738
Damien Miller1383bd82000-04-06 12:32:37 +1000739 return exit_status;
740}
741
Ben Lindstrombba81212001-06-25 05:01:22 +0000742static void
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000743x11_get_proto(char **_proto, char **_data)
Damien Millerbd483e72000-04-30 10:00:53 +1000744{
745 char line[512];
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000746 static char proto[512], data[512];
Damien Millerbd483e72000-04-30 10:00:53 +1000747 FILE *f;
748 int got_data = 0, i;
Damien Miller35b13d62002-02-05 12:12:09 +1100749 char *display;
Ben Lindstromee8d52d2002-07-23 21:03:02 +0000750 struct stat st;
Damien Millerbd483e72000-04-30 10:00:53 +1000751
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000752 *_proto = proto;
753 *_data = data;
754 proto[0] = data[0] = '\0';
Ben Lindstromee8d52d2002-07-23 21:03:02 +0000755 if (!options.xauth_location ||
756 (stat(options.xauth_location, &st) == -1)) {
757 debug("No xauth program.");
758 } else {
759 if ((display = getenv("DISPLAY")) == NULL) {
760 debug("x11_get_proto: DISPLAY not set");
761 return;
762 }
Damien Millerd3a18572000-06-07 19:55:44 +1000763 /* Try to get Xauthority information for the display. */
Damien Miller35b13d62002-02-05 12:12:09 +1100764 if (strncmp(display, "localhost:", 10) == 0)
765 /*
766 * Handle FamilyLocal case where $DISPLAY does
767 * not match an authorization entry. For this we
768 * just try "xauth list unix:displaynum.screennum".
769 * XXX: "localhost" match to determine FamilyLocal
770 * is not perfect.
771 */
Ben Lindstromfac77692002-06-06 19:49:54 +0000772 snprintf(line, sizeof line, "%s list unix:%s 2>"
Damien Miller35b13d62002-02-05 12:12:09 +1100773 _PATH_DEVNULL, options.xauth_location, display+10);
774 else
Ben Lindstromfac77692002-06-06 19:49:54 +0000775 snprintf(line, sizeof line, "%s list %.200s 2>"
Damien Miller35b13d62002-02-05 12:12:09 +1100776 _PATH_DEVNULL, options.xauth_location, display);
Ben Lindstromee8d52d2002-07-23 21:03:02 +0000777 debug2("x11_get_proto: %s", line);
Damien Millerd3a18572000-06-07 19:55:44 +1000778 f = popen(line, "r");
779 if (f && fgets(line, sizeof(line), f) &&
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000780 sscanf(line, "%*s %511s %511s", proto, data) == 2)
Damien Millerd3a18572000-06-07 19:55:44 +1000781 got_data = 1;
782 if (f)
783 pclose(f);
784 }
Damien Millerbd483e72000-04-30 10:00:53 +1000785 /*
786 * If we didn't get authentication data, just make up some
787 * data. The forwarding code will check the validity of the
788 * response anyway, and substitute this data. The X11
789 * server, however, will ignore this fake data and use
790 * whatever authentication mechanisms it was using otherwise
791 * for the local connection.
792 */
793 if (!got_data) {
794 u_int32_t rand = 0;
795
Ben Lindstromee8d52d2002-07-23 21:03:02 +0000796 log("Warning: No xauth data; using fake authentication data for X11 forwarding.");
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000797 strlcpy(proto, "MIT-MAGIC-COOKIE-1", sizeof proto);
Damien Millerbd483e72000-04-30 10:00:53 +1000798 for (i = 0; i < 16; i++) {
799 if (i % 4 == 0)
800 rand = arc4random();
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000801 snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", rand & 0xff);
Damien Millerbd483e72000-04-30 10:00:53 +1000802 rand >>= 8;
803 }
804 }
805}
806
Ben Lindstrombba81212001-06-25 05:01:22 +0000807static void
Damien Miller0bc1bd82000-11-13 22:57:25 +1100808ssh_init_forwarding(void)
809{
Kevin Steves12057502001-02-05 14:54:34 +0000810 int success = 0;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100811 int i;
Kevin Steves12057502001-02-05 14:54:34 +0000812
Damien Miller0bc1bd82000-11-13 22:57:25 +1100813 /* Initiate local TCP/IP port forwardings. */
814 for (i = 0; i < options.num_local_forwards; i++) {
815 debug("Connections to local port %d forwarded to remote address %.200s:%d",
816 options.local_forwards[i].port,
817 options.local_forwards[i].host,
818 options.local_forwards[i].host_port);
Damien Millerb16461c2002-01-22 23:29:22 +1100819 success += channel_setup_local_fwd_listener(
Damien Miller0bc1bd82000-11-13 22:57:25 +1100820 options.local_forwards[i].port,
821 options.local_forwards[i].host,
822 options.local_forwards[i].host_port,
823 options.gateway_ports);
824 }
Kevin Steves12057502001-02-05 14:54:34 +0000825 if (i > 0 && success == 0)
826 error("Could not request local forwarding.");
Damien Miller0bc1bd82000-11-13 22:57:25 +1100827
828 /* Initiate remote TCP/IP port forwardings. */
829 for (i = 0; i < options.num_remote_forwards; i++) {
830 debug("Connections to remote port %d forwarded to local address %.200s:%d",
831 options.remote_forwards[i].port,
832 options.remote_forwards[i].host,
833 options.remote_forwards[i].host_port);
834 channel_request_remote_forwarding(
835 options.remote_forwards[i].port,
836 options.remote_forwards[i].host,
837 options.remote_forwards[i].host_port);
838 }
839}
840
Ben Lindstrombba81212001-06-25 05:01:22 +0000841static void
Damien Miller0bc1bd82000-11-13 22:57:25 +1100842check_agent_present(void)
843{
844 if (options.forward_agent) {
845 /* Clear agent forwarding if we don\'t have an agent. */
Damien Miller789e95d2002-09-12 09:52:46 +1000846 if (!ssh_agent_present())
Damien Miller0bc1bd82000-11-13 22:57:25 +1100847 options.forward_agent = 0;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100848 }
849}
850
Ben Lindstrombba81212001-06-25 05:01:22 +0000851static int
Damien Miller1383bd82000-04-06 12:32:37 +1000852ssh_session(void)
853{
854 int type;
Damien Miller1383bd82000-04-06 12:32:37 +1000855 int interactive = 0;
856 int have_tty = 0;
857 struct winsize ws;
Damien Miller1383bd82000-04-06 12:32:37 +1000858 char *cp;
859
Damien Miller95def091999-11-25 00:26:21 +1100860 /* Enable compression if requested. */
861 if (options.compression) {
862 debug("Requesting compression at level %d.", options.compression_level);
863
864 if (options.compression_level < 1 || options.compression_level > 9)
865 fatal("Compression level must be from 1 (fast) to 9 (slow, best).");
866
867 /* Send the request. */
868 packet_start(SSH_CMSG_REQUEST_COMPRESSION);
869 packet_put_int(options.compression_level);
870 packet_send();
871 packet_write_wait();
Damien Millerdff50992002-01-22 23:16:32 +1100872 type = packet_read();
Damien Miller95def091999-11-25 00:26:21 +1100873 if (type == SSH_SMSG_SUCCESS)
874 packet_start_compression(options.compression_level);
875 else if (type == SSH_SMSG_FAILURE)
876 log("Warning: Remote host refused compression.");
877 else
878 packet_disconnect("Protocol error waiting for compression response.");
879 }
880 /* Allocate a pseudo tty if appropriate. */
881 if (tty_flag) {
882 debug("Requesting pty.");
883
884 /* Start the packet. */
885 packet_start(SSH_CMSG_REQUEST_PTY);
886
887 /* Store TERM in the packet. There is no limit on the
888 length of the string. */
889 cp = getenv("TERM");
890 if (!cp)
891 cp = "";
Ben Lindstrom664408d2001-06-09 01:42:01 +0000892 packet_put_cstring(cp);
Damien Miller95def091999-11-25 00:26:21 +1100893
894 /* Store window size in the packet. */
895 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
896 memset(&ws, 0, sizeof(ws));
897 packet_put_int(ws.ws_row);
898 packet_put_int(ws.ws_col);
899 packet_put_int(ws.ws_xpixel);
900 packet_put_int(ws.ws_ypixel);
901
902 /* Store tty modes in the packet. */
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000903 tty_make_modes(fileno(stdin), NULL);
Damien Miller95def091999-11-25 00:26:21 +1100904
905 /* Send the packet, and wait for it to leave. */
906 packet_send();
907 packet_write_wait();
908
909 /* Read response from the server. */
Damien Millerdff50992002-01-22 23:16:32 +1100910 type = packet_read();
Damien Miller450a7a12000-03-26 13:04:51 +1000911 if (type == SSH_SMSG_SUCCESS) {
Damien Miller95def091999-11-25 00:26:21 +1100912 interactive = 1;
Damien Miller1383bd82000-04-06 12:32:37 +1000913 have_tty = 1;
Damien Miller450a7a12000-03-26 13:04:51 +1000914 } else if (type == SSH_SMSG_FAILURE)
Damien Miller95def091999-11-25 00:26:21 +1100915 log("Warning: Remote host failed or refused to allocate a pseudo tty.");
916 else
917 packet_disconnect("Protocol error waiting for pty request response.");
918 }
919 /* Request X11 forwarding if enabled and DISPLAY is set. */
920 if (options.forward_x11 && getenv("DISPLAY") != NULL) {
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000921 char *proto, *data;
Damien Millerbd483e72000-04-30 10:00:53 +1000922 /* Get reasonable local authentication information. */
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000923 x11_get_proto(&proto, &data);
Damien Millerbd483e72000-04-30 10:00:53 +1000924 /* Request forwarding with authentication spoofing. */
Damien Miller95def091999-11-25 00:26:21 +1100925 debug("Requesting X11 forwarding with authentication spoofing.");
Damien Millerbd483e72000-04-30 10:00:53 +1000926 x11_request_forwarding_with_spoofing(0, proto, data);
Damien Miller95def091999-11-25 00:26:21 +1100927
928 /* Read response from the server. */
Damien Millerdff50992002-01-22 23:16:32 +1100929 type = packet_read();
Damien Miller95def091999-11-25 00:26:21 +1100930 if (type == SSH_SMSG_SUCCESS) {
Damien Miller95def091999-11-25 00:26:21 +1100931 interactive = 1;
Damien Millerbd483e72000-04-30 10:00:53 +1000932 } else if (type == SSH_SMSG_FAILURE) {
Damien Miller95def091999-11-25 00:26:21 +1100933 log("Warning: Remote host denied X11 forwarding.");
Damien Millerbd483e72000-04-30 10:00:53 +1000934 } else {
Damien Miller95def091999-11-25 00:26:21 +1100935 packet_disconnect("Protocol error waiting for X11 forwarding");
Damien Millerbd483e72000-04-30 10:00:53 +1000936 }
Damien Miller95def091999-11-25 00:26:21 +1100937 }
938 /* Tell the packet module whether this is an interactive session. */
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000939 packet_set_interactive(interactive);
Damien Miller95def091999-11-25 00:26:21 +1100940
941 /* Request authentication agent forwarding if appropriate. */
Damien Miller0bc1bd82000-11-13 22:57:25 +1100942 check_agent_present();
943
Damien Miller95def091999-11-25 00:26:21 +1100944 if (options.forward_agent) {
945 debug("Requesting authentication agent forwarding.");
946 auth_request_forwarding();
947
948 /* Read response from the server. */
Damien Millerdff50992002-01-22 23:16:32 +1100949 type = packet_read();
Damien Miller48b03fc2002-01-22 23:11:40 +1100950 packet_check_eom();
Damien Miller95def091999-11-25 00:26:21 +1100951 if (type != SSH_SMSG_SUCCESS)
952 log("Warning: Remote host denied authentication agent forwarding.");
953 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000954
Damien Miller0bc1bd82000-11-13 22:57:25 +1100955 /* Initiate port forwardings. */
956 ssh_init_forwarding();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000957
Damien Miller5428f641999-11-25 11:54:57 +1100958 /* If requested, let ssh continue in the background. */
Damien Miller4af51302000-04-16 11:18:38 +1000959 if (fork_after_authentication_flag)
Damien Miller5428f641999-11-25 11:54:57 +1100960 if (daemon(1, 1) < 0)
961 fatal("daemon() failed: %.200s", strerror(errno));
962
963 /*
964 * If a command was specified on the command line, execute the
965 * command now. Otherwise request the server to start a shell.
966 */
Damien Miller95def091999-11-25 00:26:21 +1100967 if (buffer_len(&command) > 0) {
968 int len = buffer_len(&command);
969 if (len > 900)
970 len = 900;
Damien Miller5a6b4fe2001-12-21 14:56:54 +1100971 debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
Damien Miller95def091999-11-25 00:26:21 +1100972 packet_start(SSH_CMSG_EXEC_CMD);
973 packet_put_string(buffer_ptr(&command), buffer_len(&command));
974 packet_send();
975 packet_write_wait();
976 } else {
977 debug("Requesting shell.");
978 packet_start(SSH_CMSG_EXEC_SHELL);
979 packet_send();
980 packet_write_wait();
981 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000982
Damien Miller95def091999-11-25 00:26:21 +1100983 /* Enter the interactive session. */
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +0000984 return client_loop(have_tty, tty_flag ?
985 options.escape_char : SSH_ESCAPECHAR_NONE, 0);
Damien Miller1383bd82000-04-06 12:32:37 +1000986}
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000987
Ben Lindstrombba81212001-06-25 05:01:22 +0000988static void
Damien Miller630d6f42002-01-22 23:17:30 +1100989client_subsystem_reply(int type, u_int32_t seq, void *ctxt)
Ben Lindstrom1e7d3062001-02-09 02:36:43 +0000990{
991 int id, len;
992
993 id = packet_get_int();
994 len = buffer_len(&command);
Ben Lindstrom4040fe12001-03-05 06:52:57 +0000995 if (len > 900)
996 len = 900;
Damien Miller48b03fc2002-01-22 23:11:40 +1100997 packet_check_eom();
Ben Lindstrom1e7d3062001-02-09 02:36:43 +0000998 if (type == SSH2_MSG_CHANNEL_FAILURE)
999 fatal("Request for subsystem '%.*s' failed on channel %d",
Damien Miller5a6b4fe2001-12-21 14:56:54 +11001000 len, (u_char *)buffer_ptr(&command), id);
Ben Lindstrom1e7d3062001-02-09 02:36:43 +00001001}
1002
Damien Miller2797f7f2002-04-23 21:09:44 +10001003void
1004client_global_request_reply(int type, u_int32_t seq, void *ctxt)
1005{
1006 int i;
1007
1008 i = client_global_request_id++;
1009 if (i >= options.num_remote_forwards) {
1010 debug("client_global_request_reply: too many replies %d > %d",
1011 i, options.num_remote_forwards);
1012 return;
1013 }
1014 debug("remote forward %s for: listen %d, connect %s:%d",
1015 type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure",
1016 options.remote_forwards[i].port,
1017 options.remote_forwards[i].host,
1018 options.remote_forwards[i].host_port);
1019 if (type == SSH2_MSG_REQUEST_FAILURE)
1020 log("Warning: remote port forwarding failed for listen port %d",
1021 options.remote_forwards[i].port);
1022}
1023
Ben Lindstromf558cf62001-09-20 23:13:49 +00001024/* request pty/x11/agent/tcpfwd/shell for channel */
Ben Lindstrombba81212001-06-25 05:01:22 +00001025static void
Ben Lindstromf558cf62001-09-20 23:13:49 +00001026ssh_session2_setup(int id, void *arg)
Damien Miller1383bd82000-04-06 12:32:37 +10001027{
1028 int len;
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001029 int interactive = 0;
Ben Lindstromae8e2d32001-04-14 23:13:02 +00001030 struct termios tio;
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001031
Ben Lindstrom604dc722002-12-23 02:08:57 +00001032 debug2("ssh_session2_setup: id %d", id);
Damien Miller1383bd82000-04-06 12:32:37 +10001033
Damien Miller1383bd82000-04-06 12:32:37 +10001034 if (tty_flag) {
1035 struct winsize ws;
1036 char *cp;
1037 cp = getenv("TERM");
1038 if (!cp)
1039 cp = "";
1040 /* Store window size in the packet. */
1041 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
1042 memset(&ws, 0, sizeof(ws));
1043
1044 channel_request_start(id, "pty-req", 0);
1045 packet_put_cstring(cp);
1046 packet_put_int(ws.ws_col);
1047 packet_put_int(ws.ws_row);
1048 packet_put_int(ws.ws_xpixel);
1049 packet_put_int(ws.ws_ypixel);
Ben Lindstromae8e2d32001-04-14 23:13:02 +00001050 tio = get_saved_tio();
1051 tty_make_modes(/*ignored*/ 0, &tio);
Damien Miller1383bd82000-04-06 12:32:37 +10001052 packet_send();
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001053 interactive = 1;
Damien Miller1383bd82000-04-06 12:32:37 +10001054 /* XXX wait for reply */
1055 }
Damien Millerbd483e72000-04-30 10:00:53 +10001056 if (options.forward_x11 &&
1057 getenv("DISPLAY") != NULL) {
Ben Lindstrom4a4bd712001-12-06 17:45:19 +00001058 char *proto, *data;
Damien Millerbd483e72000-04-30 10:00:53 +10001059 /* Get reasonable local authentication information. */
Ben Lindstrom4a4bd712001-12-06 17:45:19 +00001060 x11_get_proto(&proto, &data);
Damien Millerbd483e72000-04-30 10:00:53 +10001061 /* Request forwarding with authentication spoofing. */
1062 debug("Requesting X11 forwarding with authentication spoofing.");
1063 x11_request_forwarding_with_spoofing(id, proto, data);
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001064 interactive = 1;
Damien Millerbd483e72000-04-30 10:00:53 +10001065 /* XXX wait for reply */
1066 }
1067
Damien Miller0bc1bd82000-11-13 22:57:25 +11001068 check_agent_present();
1069 if (options.forward_agent) {
1070 debug("Requesting authentication agent forwarding.");
1071 channel_request_start(id, "auth-agent-req@openssh.com", 0);
1072 packet_send();
1073 }
1074
Damien Miller1383bd82000-04-06 12:32:37 +10001075 len = buffer_len(&command);
1076 if (len > 0) {
1077 if (len > 900)
1078 len = 900;
Damien Miller832562e2001-01-30 09:30:01 +11001079 if (subsystem_flag) {
Damien Miller5a6b4fe2001-12-21 14:56:54 +11001080 debug("Sending subsystem: %.*s", len, (u_char *)buffer_ptr(&command));
Ben Lindstrom1e7d3062001-02-09 02:36:43 +00001081 channel_request_start(id, "subsystem", /*want reply*/ 1);
1082 /* register callback for reply */
Ben Lindstromf666fec2002-06-06 19:51:58 +00001083 /* XXX we assume that client_loop has already been called */
Ben Lindstrom1e7d3062001-02-09 02:36:43 +00001084 dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &client_subsystem_reply);
1085 dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &client_subsystem_reply);
Damien Miller832562e2001-01-30 09:30:01 +11001086 } else {
Damien Miller5a6b4fe2001-12-21 14:56:54 +11001087 debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
Damien Miller832562e2001-01-30 09:30:01 +11001088 channel_request_start(id, "exec", 0);
1089 }
Ben Lindstrom4040fe12001-03-05 06:52:57 +00001090 packet_put_string(buffer_ptr(&command), buffer_len(&command));
Damien Miller1383bd82000-04-06 12:32:37 +10001091 packet_send();
1092 } else {
Damien Millera500cd62002-02-08 22:04:26 +11001093 channel_request_start(id, "shell", 0);
1094 packet_send();
Damien Miller1383bd82000-04-06 12:32:37 +10001095 }
Ben Lindstrom1e7d3062001-02-09 02:36:43 +00001096
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001097 packet_set_interactive(interactive);
Damien Miller1383bd82000-04-06 12:32:37 +10001098}
1099
Ben Lindstromf558cf62001-09-20 23:13:49 +00001100/* open new channel for a session */
Ben Lindstrombba81212001-06-25 05:01:22 +00001101static int
Ben Lindstromf558cf62001-09-20 23:13:49 +00001102ssh_session2_open(void)
Damien Miller1383bd82000-04-06 12:32:37 +10001103{
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001104 Channel *c;
1105 int window, packetmax, in, out, err;
Damien Millerad833b32000-08-23 10:46:23 +10001106
Damien Millercaf6dd62000-08-29 11:33:50 +11001107 if (stdin_null_flag) {
Ben Lindstrom31ca54a2001-02-09 02:11:24 +00001108 in = open(_PATH_DEVNULL, O_RDONLY);
Damien Millercaf6dd62000-08-29 11:33:50 +11001109 } else {
1110 in = dup(STDIN_FILENO);
1111 }
1112 out = dup(STDOUT_FILENO);
1113 err = dup(STDERR_FILENO);
1114
1115 if (in < 0 || out < 0 || err < 0)
1116 fatal("dup() in/out/err failed");
1117
Damien Miller69b69aa2000-10-28 14:19:58 +11001118 /* enable nonblocking unless tty */
1119 if (!isatty(in))
1120 set_nonblock(in);
1121 if (!isatty(out))
1122 set_nonblock(out);
1123 if (!isatty(err))
1124 set_nonblock(err);
1125
Damien Millere4340be2000-09-16 13:29:08 +11001126 window = CHAN_SES_WINDOW_DEFAULT;
1127 packetmax = CHAN_SES_PACKET_DEFAULT;
Damien Miller19a59452002-02-19 15:20:57 +11001128 if (tty_flag) {
1129 window >>= 1;
1130 packetmax >>= 1;
Damien Miller1383bd82000-04-06 12:32:37 +10001131 }
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001132 c = channel_new(
Damien Miller1383bd82000-04-06 12:32:37 +10001133 "session", SSH_CHANNEL_OPENING, in, out, err,
Damien Millere4340be2000-09-16 13:29:08 +11001134 window, packetmax, CHAN_EXTENDED_WRITE,
Damien Miller69b69aa2000-10-28 14:19:58 +11001135 xstrdup("client-session"), /*nonblock*/0);
Damien Miller1383bd82000-04-06 12:32:37 +10001136
Ben Lindstromf558cf62001-09-20 23:13:49 +00001137 debug3("ssh_session2_open: channel_new: %d", c->self);
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001138
Ben Lindstrom5ec26452001-06-09 00:18:51 +00001139 channel_send_open(c->self);
Ben Lindstromf558cf62001-09-20 23:13:49 +00001140 if (!no_shell_flag)
Damien Miller67f0bc02002-02-05 12:23:08 +11001141 channel_register_confirm(c->self, ssh_session2_setup);
Damien Miller1383bd82000-04-06 12:32:37 +10001142
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001143 return c->self;
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001144}
1145
Ben Lindstrombba81212001-06-25 05:01:22 +00001146static int
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001147ssh_session2(void)
1148{
Ben Lindstromf558cf62001-09-20 23:13:49 +00001149 int id = -1;
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001150
1151 /* XXX should be pre-session */
1152 ssh_init_forwarding();
1153
Ben Lindstromf558cf62001-09-20 23:13:49 +00001154 if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN))
1155 id = ssh_session2_open();
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001156
1157 /* If requested, let ssh continue in the background. */
1158 if (fork_after_authentication_flag)
1159 if (daemon(1, 1) < 0)
1160 fatal("daemon() failed: %.200s", strerror(errno));
1161
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +00001162 return client_loop(tty_flag, tty_flag ?
1163 options.escape_char : SSH_ESCAPECHAR_NONE, id);
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001164}
Damien Miller0bc1bd82000-11-13 22:57:25 +11001165
Ben Lindstrombba81212001-06-25 05:01:22 +00001166static void
Ben Lindstrom266dfdf2001-03-09 00:12:22 +00001167load_public_identity_files(void)
1168{
1169 char *filename;
Ben Lindstrom711b04a2001-08-06 21:12:42 +00001170 int i = 0;
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001171 Key *public;
Ben Lindstrom711b04a2001-08-06 21:12:42 +00001172#ifdef SMARTCARD
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001173 Key **keys;
1174
Ben Lindstromf7db3bb2001-08-06 21:35:51 +00001175 if (options.smartcard_device != NULL &&
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001176 options.num_identity_files < SSH_MAX_IDENTITY_FILES &&
1177 (keys = sc_get_keys(options.smartcard_device, NULL)) != NULL ) {
1178 int count = 0;
1179 for (i = 0; keys[i] != NULL; i++) {
1180 count++;
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001181 memmove(&options.identity_files[1], &options.identity_files[0],
1182 sizeof(char *) * (SSH_MAX_IDENTITY_FILES - 1));
1183 memmove(&options.identity_keys[1], &options.identity_keys[0],
1184 sizeof(Key *) * (SSH_MAX_IDENTITY_FILES - 1));
1185 options.num_identity_files++;
1186 options.identity_keys[0] = keys[i];
1187 options.identity_files[0] = xstrdup("smartcard key");;
1188 }
Ben Lindstrom4f054602002-03-26 03:23:00 +00001189 if (options.num_identity_files > SSH_MAX_IDENTITY_FILES)
1190 options.num_identity_files = SSH_MAX_IDENTITY_FILES;
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001191 i = count;
1192 xfree(keys);
Ben Lindstrom711b04a2001-08-06 21:12:42 +00001193 }
Ben Lindstromffce1472001-08-06 21:57:31 +00001194#endif /* SMARTCARD */
Ben Lindstrom711b04a2001-08-06 21:12:42 +00001195 for (; i < options.num_identity_files; i++) {
Ben Lindstrom266dfdf2001-03-09 00:12:22 +00001196 filename = tilde_expand_filename(options.identity_files[i],
1197 original_real_uid);
Ben Lindstromd0fca422001-03-26 13:44:06 +00001198 public = key_load_public(filename, NULL);
Ben Lindstrom266dfdf2001-03-09 00:12:22 +00001199 debug("identity file %s type %d", filename,
1200 public ? public->type : -1);
1201 xfree(options.identity_files[i]);
1202 options.identity_files[i] = filename;
1203 options.identity_keys[i] = public;
1204 }
1205}