blob: 53d7f0f5640eb6318cb3de448de21073443289a9 [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.
Darren Tucker0a118da2003-10-15 15:54:32 +100016 * Copyright (c) 2000, 2001, 2002, 2003 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 Miller57a44762004-04-20 20:11:57 +100043RCSID("$OpenBSD: ssh.c,v 1.210 2004/04/18 23:10:26 djm 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 Miller95def091999-11-25 00:26:21 +110082/* Flag indicating whether debug mode is on. This can be set on the command line. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100083int debug_flag = 0;
84
Damien Miller78928792000-04-12 20:17:38 +100085/* Flag indicating whether a tty should be allocated */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100086int tty_flag = 0;
Ben Lindstrom4dccfa52000-12-28 16:40:05 +000087int no_tty_flag = 0;
88int force_tty_flag = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100089
Damien Miller1383bd82000-04-06 12:32:37 +100090/* don't exec a shell */
91int no_shell_flag = 0;
Damien Miller1383bd82000-04-06 12:32:37 +100092
Damien Miller5428f641999-11-25 11:54:57 +110093/*
94 * Flag indicating that nothing should be read from stdin. This can be set
95 * on the command line.
96 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100097int stdin_null_flag = 0;
98
Damien Miller5428f641999-11-25 11:54:57 +110099/*
100 * Flag indicating that ssh should fork after authentication. This is useful
Ben Lindstromf666fec2002-06-06 19:51:58 +0000101 * so that the passphrase can be entered manually, and then ssh goes to the
Damien Miller5428f641999-11-25 11:54:57 +1100102 * background.
103 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000104int fork_after_authentication_flag = 0;
105
Damien Miller5428f641999-11-25 11:54:57 +1100106/*
107 * General data structure for command line options and options configurable
108 * in configuration files. See readconf.h.
109 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000110Options options;
111
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000112/* optional user configfile */
113char *config = NULL;
114
Damien Miller5428f641999-11-25 11:54:57 +1100115/*
116 * Name of the host we are connecting to. This is the name given on the
117 * command line, or the HostName specified for the user-supplied name in a
118 * configuration file.
119 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000120char *host;
121
122/* socket address the host resolves to */
Damien Miller34132e52000-01-14 15:45:46 +1100123struct sockaddr_storage hostaddr;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000124
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000125/* Private host keys. */
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000126Sensitive sensitive_data;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000127
128/* Original real UID. */
129uid_t original_real_uid;
Ben Lindstromf9c48842002-06-11 16:37:51 +0000130uid_t original_effective_uid;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000131
Damien Miller1383bd82000-04-06 12:32:37 +1000132/* command to be executed */
133Buffer command;
134
Damien Miller832562e2001-01-30 09:30:01 +1100135/* Should we execute a command or invoke a subsystem? */
136int subsystem_flag = 0;
137
Damien Miller2797f7f2002-04-23 21:09:44 +1000138/* # of replies received for global requests */
139static int client_global_request_id = 0;
140
Damien Miller8c4e18a2002-09-19 12:05:02 +1000141/* pid of proxycommand child process */
142pid_t proxy_command_pid = 0;
143
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000144/* Prints a help message to the user. This function never returns. */
145
Ben Lindstrombba81212001-06-25 05:01:22 +0000146static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000147usage(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000148{
Damien Miller50955102004-03-22 09:34:58 +1100149 fprintf(stderr,
150"usage: ssh [-1246AaCfghkNnqsTtVvXxY] [-b bind_address] [-c cipher_spec]\n"
151" [-D port] [-e escape_char] [-F configfile] [-i identity_file]\n"
152" [-L port:host:hostport] [-l login_name] [-m mac_spec] [-o option]\n"
153" [-p port] [-R port:host:hostport] [user@]hostname [command]\n"
154 );
Damien Miller95def091999-11-25 00:26:21 +1100155 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000156}
157
Ben Lindstrombba81212001-06-25 05:01:22 +0000158static int ssh_session(void);
159static int ssh_session2(void);
160static void load_public_identity_files(void);
Damien Miller1383bd82000-04-06 12:32:37 +1000161
Damien Miller95def091999-11-25 00:26:21 +1100162/*
163 * Main program for the ssh client.
164 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000165int
166main(int ac, char **av)
167{
Ben Lindstrom24157572002-06-12 16:09:39 +0000168 int i, opt, exit_status;
Damien Milleraae6c611999-12-06 11:47:28 +1100169 u_short fwd_port, fwd_host_port;
Ben Lindstrom1a174712001-09-12 17:56:15 +0000170 char sfwd_port[6], sfwd_host_port[6];
Damien Miller9836cf82003-12-17 16:30:06 +1100171 char *p, *cp, *line, buf[256];
Damien Miller95def091999-11-25 00:26:21 +1100172 struct stat st;
Ben Lindstrom086cf212001-03-05 05:56:40 +0000173 struct passwd *pw;
Damien Miller1383bd82000-04-06 12:32:37 +1000174 int dummy;
Ben Lindstrom5ccf63a2001-09-24 20:00:10 +0000175 extern int optind, optreset;
Damien Miller4f8e6692001-07-14 13:22:53 +1000176 extern char *optarg;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000177
Damien Miller59d3d5b2003-08-22 09:34:41 +1000178 __progname = ssh_get_progname(av[0]);
Damien Millerf9b625c2000-07-09 22:42:32 +1000179 init_rng();
180
Damien Miller5428f641999-11-25 11:54:57 +1100181 /*
182 * Save the original real uid. It will be needed later (uid-swapping
183 * may clobber the real uid).
184 */
Damien Miller95def091999-11-25 00:26:21 +1100185 original_real_uid = getuid();
186 original_effective_uid = geteuid();
Damien Millera8e06ce2003-11-21 23:48:55 +1100187
Damien Miller50b9a602002-09-04 16:50:06 +1000188 /*
189 * Use uid-swapping to give up root privileges for the duration of
190 * option processing. We will re-instantiate the rights when we are
191 * ready to create the privileged port, and will permanently drop
192 * them when the port has been created (actually, when the connection
193 * has been made, as we may need to create the port several times).
194 */
195 PRIV_END;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000196
Damien Miller05dd7952000-10-01 00:42:48 +1100197#ifdef HAVE_SETRLIMIT
Damien Miller95def091999-11-25 00:26:21 +1100198 /* If we are installed setuid root be careful to not drop core. */
199 if (original_real_uid != original_effective_uid) {
200 struct rlimit rlim;
201 rlim.rlim_cur = rlim.rlim_max = 0;
202 if (setrlimit(RLIMIT_CORE, &rlim) < 0)
203 fatal("setrlimit failed: %.100s", strerror(errno));
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000204 }
Damien Millerbac2d8a2000-09-05 16:13:06 +1100205#endif
Ben Lindstrom3fcf1a22001-04-08 18:26:59 +0000206 /* Get user data. */
207 pw = getpwuid(original_real_uid);
208 if (!pw) {
Damien Miller996acd22003-04-09 20:59:48 +1000209 logit("You don't exist, go away!");
Ben Lindstrom3fcf1a22001-04-08 18:26:59 +0000210 exit(1);
211 }
212 /* Take a copy of the returned structure. */
213 pw = pwcopy(pw);
214
Damien Miller5428f641999-11-25 11:54:57 +1100215 /*
Damien Miller5428f641999-11-25 11:54:57 +1100216 * Set our umask to something reasonable, as some files are created
217 * with the default umask. This will make them world-readable but
218 * writable only by the owner, which is ok for all files for which we
219 * don't set the modes explicitly.
220 */
Damien Miller95def091999-11-25 00:26:21 +1100221 umask(022);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000222
Damien Miller95def091999-11-25 00:26:21 +1100223 /* Initialize option structure to indicate that no values have been set. */
224 initialize_options(&options);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000225
Damien Miller95def091999-11-25 00:26:21 +1100226 /* Parse command-line arguments. */
227 host = NULL;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000228
Damien Millerf4614452001-07-14 12:18:10 +1000229again:
230 while ((opt = getopt(ac, av,
Darren Tucker0a118da2003-10-15 15:54:32 +1000231 "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:NPR:TVXY")) != -1) {
Damien Miller95def091999-11-25 00:26:21 +1100232 switch (opt) {
Ben Lindstrom1e7d3062001-02-09 02:36:43 +0000233 case '1':
234 options.protocol = SSH_PROTO_1;
235 break;
Damien Miller4af51302000-04-16 11:18:38 +1000236 case '2':
237 options.protocol = SSH_PROTO_2;
238 break;
Damien Miller34132e52000-01-14 15:45:46 +1100239 case '4':
Darren Tucker0a4f04b2003-07-03 20:37:47 +1000240 options.address_family = AF_INET;
Damien Miller34132e52000-01-14 15:45:46 +1100241 break;
Damien Miller34132e52000-01-14 15:45:46 +1100242 case '6':
Darren Tucker0a4f04b2003-07-03 20:37:47 +1000243 options.address_family = AF_INET6;
Damien Miller34132e52000-01-14 15:45:46 +1100244 break;
Damien Miller95def091999-11-25 00:26:21 +1100245 case 'n':
246 stdin_null_flag = 1;
247 break;
Damien Miller95def091999-11-25 00:26:21 +1100248 case 'f':
249 fork_after_authentication_flag = 1;
250 stdin_null_flag = 1;
251 break;
Damien Miller95def091999-11-25 00:26:21 +1100252 case 'x':
253 options.forward_x11 = 0;
254 break;
Damien Miller95def091999-11-25 00:26:21 +1100255 case 'X':
256 options.forward_x11 = 1;
257 break;
Darren Tucker0a118da2003-10-15 15:54:32 +1000258 case 'Y':
259 options.forward_x11 = 1;
260 options.forward_x11_trusted = 1;
261 break;
Damien Miller95def091999-11-25 00:26:21 +1100262 case 'g':
263 options.gateway_ports = 1;
264 break;
Damien Miller147bba32002-09-04 16:46:06 +1000265 case 'P': /* deprecated */
Damien Miller95def091999-11-25 00:26:21 +1100266 options.use_privileged_port = 0;
267 break;
Damien Miller95def091999-11-25 00:26:21 +1100268 case 'a':
269 options.forward_agent = 0;
270 break;
Damien Millerb1715dc2000-05-30 13:44:51 +1000271 case 'A':
272 options.forward_agent = 1;
273 break;
Damien Miller95def091999-11-25 00:26:21 +1100274 case 'k':
Damien Millere0113cc2003-11-24 13:10:09 +1100275 options.gss_deleg_creds = 0;
Damien Miller95def091999-11-25 00:26:21 +1100276 break;
Damien Miller95def091999-11-25 00:26:21 +1100277 case 'i':
278 if (stat(optarg, &st) < 0) {
Damien Millerf4614452001-07-14 12:18:10 +1000279 fprintf(stderr, "Warning: Identity file %s "
280 "does not exist.\n", optarg);
Damien Miller95def091999-11-25 00:26:21 +1100281 break;
282 }
Damien Millerf4614452001-07-14 12:18:10 +1000283 if (options.num_identity_files >=
284 SSH_MAX_IDENTITY_FILES)
285 fatal("Too many identity files specified "
286 "(max %d)", SSH_MAX_IDENTITY_FILES);
287 options.identity_files[options.num_identity_files++] =
288 xstrdup(optarg);
Damien Miller95def091999-11-25 00:26:21 +1100289 break;
Ben Lindstromc5b68002001-07-04 04:52:03 +0000290 case 'I':
291#ifdef SMARTCARD
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000292 options.smartcard_device = xstrdup(optarg);
Ben Lindstrombcc18082001-08-06 21:59:25 +0000293#else
Ben Lindstromc5b68002001-07-04 04:52:03 +0000294 fprintf(stderr, "no support for smartcards.\n");
Ben Lindstrombcc18082001-08-06 21:59:25 +0000295#endif
Ben Lindstromc5b68002001-07-04 04:52:03 +0000296 break;
Damien Miller95def091999-11-25 00:26:21 +1100297 case 't':
Ben Lindstrom4dccfa52000-12-28 16:40:05 +0000298 if (tty_flag)
299 force_tty_flag = 1;
Damien Miller95def091999-11-25 00:26:21 +1100300 tty_flag = 1;
301 break;
Damien Miller95def091999-11-25 00:26:21 +1100302 case 'v':
Darren Tuckere98dfa32003-07-19 19:54:31 +1000303 if (debug_flag == 0) {
Damien Millere4340be2000-09-16 13:29:08 +1100304 debug_flag = 1;
305 options.log_level = SYSLOG_LEVEL_DEBUG1;
Darren Tuckere98dfa32003-07-19 19:54:31 +1000306 } else {
307 if (options.log_level < SYSLOG_LEVEL_DEBUG3)
308 options.log_level++;
Damien Millere4340be2000-09-16 13:29:08 +1100309 break;
Darren Tuckere98dfa32003-07-19 19:54:31 +1000310 }
Damien Millere4340be2000-09-16 13:29:08 +1100311 /* fallthrough */
Damien Miller95def091999-11-25 00:26:21 +1100312 case 'V':
Damien Miller0c889cd2004-03-22 09:36:00 +1100313 fprintf(stderr, "%s, %s\n",
314 SSH_VERSION, SSLeay_version(SSLEAY_VERSION));
Damien Miller95def091999-11-25 00:26:21 +1100315 if (opt == 'V')
316 exit(0);
Damien Miller95def091999-11-25 00:26:21 +1100317 break;
Damien Miller95def091999-11-25 00:26:21 +1100318 case 'q':
319 options.log_level = SYSLOG_LEVEL_QUIET;
320 break;
Damien Miller95def091999-11-25 00:26:21 +1100321 case 'e':
322 if (optarg[0] == '^' && optarg[2] == 0 &&
Damien Millerf4614452001-07-14 12:18:10 +1000323 (u_char) optarg[1] >= 64 &&
324 (u_char) optarg[1] < 128)
Ben Lindstrom46c16222000-12-22 01:43:59 +0000325 options.escape_char = (u_char) optarg[1] & 31;
Damien Miller95def091999-11-25 00:26:21 +1100326 else if (strlen(optarg) == 1)
Ben Lindstrom46c16222000-12-22 01:43:59 +0000327 options.escape_char = (u_char) optarg[0];
Damien Miller95def091999-11-25 00:26:21 +1100328 else if (strcmp(optarg, "none") == 0)
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +0000329 options.escape_char = SSH_ESCAPECHAR_NONE;
Damien Miller95def091999-11-25 00:26:21 +1100330 else {
Damien Millerf4614452001-07-14 12:18:10 +1000331 fprintf(stderr, "Bad escape character '%s'.\n",
332 optarg);
Damien Miller95def091999-11-25 00:26:21 +1100333 exit(1);
334 }
335 break;
Damien Miller95def091999-11-25 00:26:21 +1100336 case 'c':
Damien Millereba71ba2000-04-29 23:57:08 +1000337 if (ciphers_valid(optarg)) {
338 /* SSH2 only */
339 options.ciphers = xstrdup(optarg);
Damien Miller30c3d422000-05-09 11:02:59 +1000340 options.cipher = SSH_CIPHER_ILLEGAL;
Damien Millereba71ba2000-04-29 23:57:08 +1000341 } else {
342 /* SSH1 only */
Damien Millere39cacc2000-11-29 12:18:44 +1100343 options.cipher = cipher_number(optarg);
344 if (options.cipher == -1) {
Damien Millerf4614452001-07-14 12:18:10 +1000345 fprintf(stderr,
346 "Unknown cipher type '%s'\n",
347 optarg);
Damien Millereba71ba2000-04-29 23:57:08 +1000348 exit(1);
349 }
Damien Millerf4614452001-07-14 12:18:10 +1000350 if (options.cipher == SSH_CIPHER_3DES)
Damien Millere39cacc2000-11-29 12:18:44 +1100351 options.ciphers = "3des-cbc";
Damien Millerf4614452001-07-14 12:18:10 +1000352 else if (options.cipher == SSH_CIPHER_BLOWFISH)
Damien Millere39cacc2000-11-29 12:18:44 +1100353 options.ciphers = "blowfish-cbc";
Damien Millerf4614452001-07-14 12:18:10 +1000354 else
Damien Millere39cacc2000-11-29 12:18:44 +1100355 options.ciphers = (char *)-1;
Damien Miller95def091999-11-25 00:26:21 +1100356 }
357 break;
Ben Lindstrom06b33aa2001-02-15 03:01:59 +0000358 case 'm':
359 if (mac_valid(optarg))
360 options.macs = xstrdup(optarg);
361 else {
Damien Millerf4614452001-07-14 12:18:10 +1000362 fprintf(stderr, "Unknown mac type '%s'\n",
363 optarg);
Ben Lindstrom06b33aa2001-02-15 03:01:59 +0000364 exit(1);
365 }
366 break;
Damien Miller95def091999-11-25 00:26:21 +1100367 case 'p':
Ben Lindstrom19066a12001-04-12 23:39:26 +0000368 options.port = a2port(optarg);
369 if (options.port == 0) {
Ben Lindstrom146edb92001-04-11 23:06:28 +0000370 fprintf(stderr, "Bad port '%s'\n", optarg);
371 exit(1);
372 }
Damien Miller95def091999-11-25 00:26:21 +1100373 break;
Damien Miller95def091999-11-25 00:26:21 +1100374 case 'l':
375 options.user = optarg;
376 break;
Ben Lindstrom1a174712001-09-12 17:56:15 +0000377
Damien Miller95def091999-11-25 00:26:21 +1100378 case 'L':
Ben Lindstrom1a174712001-09-12 17:56:15 +0000379 case 'R':
Damien Miller1ea71662003-05-14 22:33:58 +1000380 if (sscanf(optarg, "%5[0123456789]:%255[^:]:%5[0123456789]",
Ben Lindstrom1a174712001-09-12 17:56:15 +0000381 sfwd_port, buf, sfwd_host_port) != 3 &&
Damien Miller1ea71662003-05-14 22:33:58 +1000382 sscanf(optarg, "%5[0123456789]/%255[^/]/%5[0123456789]",
Ben Lindstrom1a174712001-09-12 17:56:15 +0000383 sfwd_port, buf, sfwd_host_port) != 3) {
Damien Millerf4614452001-07-14 12:18:10 +1000384 fprintf(stderr,
Ben Lindstrom1a174712001-09-12 17:56:15 +0000385 "Bad forwarding specification '%s'\n",
Damien Millerf4614452001-07-14 12:18:10 +1000386 optarg);
Damien Miller95def091999-11-25 00:26:21 +1100387 usage();
388 /* NOTREACHED */
389 }
Ben Lindstrom1a174712001-09-12 17:56:15 +0000390 if ((fwd_port = a2port(sfwd_port)) == 0 ||
Ben Lindstrom6328ab32002-03-22 02:54:23 +0000391 (fwd_host_port = a2port(sfwd_host_port)) == 0) {
Ben Lindstrom1a174712001-09-12 17:56:15 +0000392 fprintf(stderr,
393 "Bad forwarding port(s) '%s'\n", optarg);
394 exit(1);
395 }
396 if (opt == 'L')
397 add_local_forward(&options, fwd_port, buf,
398 fwd_host_port);
399 else if (opt == 'R')
400 add_remote_forward(&options, fwd_port, buf,
Damien Miller9f0f5c62001-12-21 14:45:46 +1100401 fwd_host_port);
Damien Miller95def091999-11-25 00:26:21 +1100402 break;
Ben Lindstrom3bb4f9d2001-04-08 18:30:26 +0000403
404 case 'D':
Ben Lindstrom19066a12001-04-12 23:39:26 +0000405 fwd_port = a2port(optarg);
406 if (fwd_port == 0) {
Damien Millerf4614452001-07-14 12:18:10 +1000407 fprintf(stderr, "Bad dynamic port '%s'\n",
408 optarg);
Ben Lindstrom146edb92001-04-11 23:06:28 +0000409 exit(1);
410 }
Darren Tucker1c52ee32003-08-13 20:38:36 +1000411 add_local_forward(&options, fwd_port, "socks", 0);
Ben Lindstrom3bb4f9d2001-04-08 18:30:26 +0000412 break;
413
Damien Miller95def091999-11-25 00:26:21 +1100414 case 'C':
415 options.compression = 1;
416 break;
Damien Miller1383bd82000-04-06 12:32:37 +1000417 case 'N':
418 no_shell_flag = 1;
419 no_tty_flag = 1;
420 break;
Damien Miller1383bd82000-04-06 12:32:37 +1000421 case 'T':
422 no_tty_flag = 1;
423 break;
Damien Miller95def091999-11-25 00:26:21 +1100424 case 'o':
425 dummy = 1;
Damien Miller9836cf82003-12-17 16:30:06 +1100426 line = xstrdup(optarg);
Damien Millerf4614452001-07-14 12:18:10 +1000427 if (process_config_line(&options, host ? host : "",
Damien Miller9836cf82003-12-17 16:30:06 +1100428 line, "command-line", 0, &dummy) != 0)
Damien Miller95def091999-11-25 00:26:21 +1100429 exit(1);
Damien Miller9836cf82003-12-17 16:30:06 +1100430 xfree(line);
Damien Miller95def091999-11-25 00:26:21 +1100431 break;
Damien Miller832562e2001-01-30 09:30:01 +1100432 case 's':
433 subsystem_flag = 1;
434 break;
Ben Lindstrome0f88042001-04-30 13:06:24 +0000435 case 'b':
436 options.bind_address = optarg;
437 break;
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000438 case 'F':
439 config = optarg;
440 break;
Damien Miller95def091999-11-25 00:26:21 +1100441 default:
442 usage();
443 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000444 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000445
Damien Millerf4614452001-07-14 12:18:10 +1000446 ac -= optind;
447 av += optind;
448
449 if (ac > 0 && !host && **av != '-') {
Ben Lindstromc276c122002-12-23 02:14:51 +0000450 if (strrchr(*av, '@')) {
Damien Millerf4614452001-07-14 12:18:10 +1000451 p = xstrdup(*av);
Ben Lindstromc276c122002-12-23 02:14:51 +0000452 cp = strrchr(p, '@');
Damien Millerf4614452001-07-14 12:18:10 +1000453 if (cp == NULL || cp == p)
454 usage();
455 options.user = p;
456 *cp = '\0';
457 host = ++cp;
458 } else
459 host = *av;
Ben Lindstromb9fa6912002-12-23 02:24:54 +0000460 if (ac > 1) {
461 optind = optreset = 1;
Damien Millerf4614452001-07-14 12:18:10 +1000462 goto again;
463 }
Ben Lindstromb9fa6912002-12-23 02:24:54 +0000464 ac--, av++;
Damien Millerf4614452001-07-14 12:18:10 +1000465 }
466
Damien Miller95def091999-11-25 00:26:21 +1100467 /* Check that we got a host name. */
468 if (!host)
469 usage();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000470
Damien Millercb5e44a2000-09-29 12:12:36 +1100471 SSLeay_add_all_algorithms();
Damien Miller0bc1bd82000-11-13 22:57:25 +1100472 ERR_load_crypto_strings();
Damien Millercb5e44a2000-09-29 12:12:36 +1100473
Damien Miller95def091999-11-25 00:26:21 +1100474 /* Initialize the command to execute on remote host. */
475 buffer_init(&command);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000476
Damien Miller5428f641999-11-25 11:54:57 +1100477 /*
478 * Save the command to execute on the remote host in a buffer. There
479 * is no limit on the length of the command, except by the maximum
480 * packet size. Also sets the tty flag if there is no command.
481 */
Damien Millerf4614452001-07-14 12:18:10 +1000482 if (!ac) {
Damien Miller95def091999-11-25 00:26:21 +1100483 /* No command specified - execute shell on a tty. */
484 tty_flag = 1;
Damien Miller832562e2001-01-30 09:30:01 +1100485 if (subsystem_flag) {
Damien Millerf4614452001-07-14 12:18:10 +1000486 fprintf(stderr,
487 "You must specify a subsystem to invoke.\n");
Damien Miller832562e2001-01-30 09:30:01 +1100488 usage();
489 }
Damien Miller95def091999-11-25 00:26:21 +1100490 } else {
Damien Millerf4614452001-07-14 12:18:10 +1000491 /* A command has been specified. Store it into the buffer. */
492 for (i = 0; i < ac; i++) {
493 if (i)
Damien Miller95def091999-11-25 00:26:21 +1100494 buffer_append(&command, " ", 1);
495 buffer_append(&command, av[i], strlen(av[i]));
496 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000497 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000498
Damien Miller95def091999-11-25 00:26:21 +1100499 /* Cannot fork to background if no command. */
Damien Millercaf6dd62000-08-29 11:33:50 +1100500 if (fork_after_authentication_flag && buffer_len(&command) == 0 && !no_shell_flag)
Damien Miller95def091999-11-25 00:26:21 +1100501 fatal("Cannot fork into background without a command to execute.");
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000502
Damien Miller95def091999-11-25 00:26:21 +1100503 /* Allocate a tty by default if no command specified. */
504 if (buffer_len(&command) == 0)
505 tty_flag = 1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000506
Ben Lindstroma962c2f2002-07-04 00:14:17 +0000507 /* Force no tty */
Ben Lindstromc72745a2000-12-02 19:03:54 +0000508 if (no_tty_flag)
509 tty_flag = 0;
Damien Miller95def091999-11-25 00:26:21 +1100510 /* Do not allocate a tty if stdin is not a tty. */
Ben Lindstrom4dccfa52000-12-28 16:40:05 +0000511 if (!isatty(fileno(stdin)) && !force_tty_flag) {
Damien Miller95def091999-11-25 00:26:21 +1100512 if (tty_flag)
Damien Miller996acd22003-04-09 20:59:48 +1000513 logit("Pseudo-terminal will not be allocated because stdin is not a terminal.");
Damien Miller95def091999-11-25 00:26:21 +1100514 tty_flag = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000515 }
Damien Miller1383bd82000-04-06 12:32:37 +1000516
Ben Lindstrom8a432f52001-03-05 07:24:46 +0000517 /*
518 * Initialize "log" output. Since we are the client all output
519 * actually goes to stderr.
520 */
Ben Lindstrom2b646522001-04-12 16:16:57 +0000521 log_init(av[0], options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level,
522 SYSLOG_FACILITY_USER, 1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000523
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000524 /*
525 * Read per-user configuration file. Ignore the system wide config
526 * file if the user specifies a config file on the command line.
527 */
528 if (config != NULL) {
Damien Miller57a44762004-04-20 20:11:57 +1000529 if (!read_config_file(config, host, &options, 0), 0)
Ben Lindstromedc0cf22001-09-12 18:32:20 +0000530 fatal("Can't open user config file %.100s: "
531 "%.100s", config, strerror(errno));
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000532 } else {
533 snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir,
534 _PATH_SSH_USER_CONFFILE);
Damien Miller57a44762004-04-20 20:11:57 +1000535 (void)read_config_file(buf, host, &options, 1);
Ben Lindstrom83f07d12001-10-03 17:22:29 +0000536
537 /* Read systemwide configuration file after use config. */
Damien Miller57a44762004-04-20 20:11:57 +1000538 (void)read_config_file(_PATH_HOST_CONFIG_FILE, host,
539 &options, 0);
Ben Lindstrom14f31ab2001-09-12 17:48:04 +0000540 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000541
Damien Miller95def091999-11-25 00:26:21 +1100542 /* Fill configuration defaults. */
543 fill_default_options(&options);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000544
Darren Tucker0a4f04b2003-07-03 20:37:47 +1000545 channel_set_af(options.address_family);
546
Damien Miller95def091999-11-25 00:26:21 +1100547 /* reinit */
Ben Lindstrom8a432f52001-03-05 07:24:46 +0000548 log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000549
Damien Miller60bc5172001-03-19 09:38:15 +1100550 seed_rng();
551
Damien Miller95def091999-11-25 00:26:21 +1100552 if (options.user == NULL)
553 options.user = xstrdup(pw->pw_name);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000554
Damien Miller95def091999-11-25 00:26:21 +1100555 if (options.hostname != NULL)
556 host = options.hostname;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000557
Darren Tucker3f521e22003-07-03 16:20:42 +1000558 /* force lowercase for hostkey matching */
559 if (options.host_key_alias != NULL) {
560 for (p = options.host_key_alias; *p; p++)
561 if (isupper(*p))
562 *p = tolower(*p);
563 }
564
Damien Miller9f1e33a2003-02-24 11:57:32 +1100565 if (options.proxy_command != NULL &&
566 strcmp(options.proxy_command, "none") == 0)
567 options.proxy_command = NULL;
568
Kevin Stevesfcec7f82000-12-15 19:55:48 +0000569 /* Open a connection to the remote host. */
Darren Tucker0a4f04b2003-07-03 20:37:47 +1000570 if (ssh_connect(host, &hostaddr, options.port,
571 options.address_family, options.connection_attempts,
Ben Lindstrom1aa64272002-06-11 20:28:05 +0000572#ifdef HAVE_CYGWIN
573 options.use_privileged_port,
574#else
Ben Lindstromf9c48842002-06-11 16:37:51 +0000575 original_effective_uid == 0 && options.use_privileged_port,
Ben Lindstrom1aa64272002-06-11 20:28:05 +0000576#endif
Ben Lindstromda394ca2002-06-12 16:11:12 +0000577 options.proxy_command) != 0)
Ben Lindstrom24157572002-06-12 16:09:39 +0000578 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000579
Damien Miller5428f641999-11-25 11:54:57 +1100580 /*
581 * If we successfully made the connection, load the host private key
582 * in case we will need it later for combined rsa-rhosts
583 * authentication. This must be done before releasing extra
584 * privileges, because the file is only readable by root.
Ben Lindstrom9e5bb572002-06-06 19:58:27 +0000585 * If we cannot access the private keys, load the public keys
586 * instead and try to execute the ssh-keysign helper instead.
Damien Miller5428f641999-11-25 11:54:57 +1100587 */
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000588 sensitive_data.nkeys = 0;
589 sensitive_data.keys = NULL;
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000590 sensitive_data.external_keysign = 0;
Ben Lindstrom24157572002-06-12 16:09:39 +0000591 if (options.rhosts_rsa_authentication ||
592 options.hostbased_authentication) {
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000593 sensitive_data.nkeys = 3;
Ben Lindstroma962c2f2002-07-04 00:14:17 +0000594 sensitive_data.keys = xmalloc(sensitive_data.nkeys *
595 sizeof(Key));
Ben Lindstromf9c48842002-06-11 16:37:51 +0000596
597 PRIV_START;
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000598 sensitive_data.keys[0] = key_load_private_type(KEY_RSA1,
Ben Lindstromd0fca422001-03-26 13:44:06 +0000599 _PATH_HOST_KEY_FILE, "", NULL);
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000600 sensitive_data.keys[1] = key_load_private_type(KEY_DSA,
601 _PATH_HOST_DSA_KEY_FILE, "", NULL);
602 sensitive_data.keys[2] = key_load_private_type(KEY_RSA,
603 _PATH_HOST_RSA_KEY_FILE, "", NULL);
Ben Lindstromf9c48842002-06-11 16:37:51 +0000604 PRIV_END;
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000605
Ben Lindstrom5d35a2f2002-07-04 00:19:40 +0000606 if (options.hostbased_authentication == 1 &&
607 sensitive_data.keys[0] == NULL &&
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000608 sensitive_data.keys[1] == NULL &&
609 sensitive_data.keys[2] == NULL) {
610 sensitive_data.keys[1] = key_load_public(
611 _PATH_HOST_DSA_KEY_FILE, NULL);
612 sensitive_data.keys[2] = key_load_public(
613 _PATH_HOST_RSA_KEY_FILE, NULL);
614 sensitive_data.external_keysign = 1;
615 }
Damien Miller95def091999-11-25 00:26:21 +1100616 }
Damien Miller5428f641999-11-25 11:54:57 +1100617 /*
618 * Get rid of any extra privileges that we may have. We will no
619 * longer need them. Also, extra privileges could make it very hard
620 * to read identity files and other non-world-readable files from the
621 * user's home directory if it happens to be on a NFS volume where
622 * root is mapped to nobody.
623 */
Ben Lindstromf9c48842002-06-11 16:37:51 +0000624 seteuid(original_real_uid);
625 setuid(original_real_uid);
Damien Miller95def091999-11-25 00:26:21 +1100626
Damien Miller5428f641999-11-25 11:54:57 +1100627 /*
628 * Now that we are back to our own permissions, create ~/.ssh
629 * directory if it doesn\'t already exist.
630 */
Ben Lindstrom930b14a2001-08-15 23:19:21 +0000631 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 +1100632 if (stat(buf, &st) < 0)
Damien Millerbe484b52000-07-15 14:14:16 +1000633 if (mkdir(buf, 0700) < 0)
Damien Miller95def091999-11-25 00:26:21 +1100634 error("Could not create directory '%.200s'.", buf);
635
Ben Lindstrom266dfdf2001-03-09 00:12:22 +0000636 /* load options.identity_files */
637 load_public_identity_files();
638
639 /* Expand ~ in known host file names. */
640 /* XXX mem-leaks: */
Damien Miller0bc1bd82000-11-13 22:57:25 +1100641 options.system_hostfile =
642 tilde_expand_filename(options.system_hostfile, original_real_uid);
643 options.user_hostfile =
644 tilde_expand_filename(options.user_hostfile, original_real_uid);
645 options.system_hostfile2 =
646 tilde_expand_filename(options.system_hostfile2, original_real_uid);
647 options.user_hostfile2 =
648 tilde_expand_filename(options.user_hostfile2, original_real_uid);
Damien Miller95def091999-11-25 00:26:21 +1100649
Damien Miller07cd5892001-11-12 10:52:03 +1100650 signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */
651
Damien Miller95def091999-11-25 00:26:21 +1100652 /* Log into the remote system. This never returns if the login fails. */
Ben Lindstrom1bad2562002-06-06 19:57:33 +0000653 ssh_login(&sensitive_data, host, (struct sockaddr *)&hostaddr, pw);
Damien Miller95def091999-11-25 00:26:21 +1100654
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000655 /* We no longer need the private host keys. Clear them now. */
656 if (sensitive_data.nkeys != 0) {
657 for (i = 0; i < sensitive_data.nkeys; i++) {
658 if (sensitive_data.keys[i] != NULL) {
659 /* Destroys contents safely */
660 debug3("clear hostkey %d", i);
661 key_free(sensitive_data.keys[i]);
662 sensitive_data.keys[i] = NULL;
663 }
664 }
665 xfree(sensitive_data.keys);
666 }
Ben Lindstroma6c8a8d2001-08-06 21:42:00 +0000667 for (i = 0; i < options.num_identity_files; i++) {
668 if (options.identity_files[i]) {
669 xfree(options.identity_files[i]);
670 options.identity_files[i] = NULL;
671 }
672 if (options.identity_keys[i]) {
673 key_free(options.identity_keys[i]);
674 options.identity_keys[i] = NULL;
675 }
676 }
Damien Miller95def091999-11-25 00:26:21 +1100677
Damien Miller1383bd82000-04-06 12:32:37 +1000678 exit_status = compat20 ? ssh_session2() : ssh_session();
679 packet_close();
Damien Miller8c4e18a2002-09-19 12:05:02 +1000680
681 /*
Damien Millera8e06ce2003-11-21 23:48:55 +1100682 * Send SIGHUP to proxy command if used. We don't wait() in
Damien Miller8c4e18a2002-09-19 12:05:02 +1000683 * case it hangs and instead rely on init to reap the child
684 */
685 if (proxy_command_pid > 1)
686 kill(proxy_command_pid, SIGHUP);
687
Damien Miller1383bd82000-04-06 12:32:37 +1000688 return exit_status;
689}
690
Darren Tucker0a118da2003-10-15 15:54:32 +1000691#define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1"
692
Ben Lindstrombba81212001-06-25 05:01:22 +0000693static void
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000694x11_get_proto(char **_proto, char **_data)
Damien Millerbd483e72000-04-30 10:00:53 +1000695{
Darren Tucker0a118da2003-10-15 15:54:32 +1000696 char cmd[1024];
Damien Millerbd483e72000-04-30 10:00:53 +1000697 char line[512];
Darren Tucker0a118da2003-10-15 15:54:32 +1000698 char xdisplay[512];
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000699 static char proto[512], data[512];
Damien Millerbd483e72000-04-30 10:00:53 +1000700 FILE *f;
Darren Tucker0a118da2003-10-15 15:54:32 +1000701 int got_data = 0, generated = 0, do_unlink = 0, i;
702 char *display, *xauthdir, *xauthfile;
Ben Lindstromee8d52d2002-07-23 21:03:02 +0000703 struct stat st;
Damien Millerbd483e72000-04-30 10:00:53 +1000704
Darren Tucker0a118da2003-10-15 15:54:32 +1000705 xauthdir = xauthfile = NULL;
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000706 *_proto = proto;
707 *_data = data;
708 proto[0] = data[0] = '\0';
Darren Tucker0a118da2003-10-15 15:54:32 +1000709
Ben Lindstromee8d52d2002-07-23 21:03:02 +0000710 if (!options.xauth_location ||
711 (stat(options.xauth_location, &st) == -1)) {
712 debug("No xauth program.");
713 } else {
714 if ((display = getenv("DISPLAY")) == NULL) {
715 debug("x11_get_proto: DISPLAY not set");
716 return;
717 }
Darren Tucker0a118da2003-10-15 15:54:32 +1000718 /*
719 * Handle FamilyLocal case where $DISPLAY does
720 * not match an authorization entry. For this we
721 * just try "xauth list unix:displaynum.screennum".
722 * XXX: "localhost" match to determine FamilyLocal
723 * is not perfect.
724 */
725 if (strncmp(display, "localhost:", 10) == 0) {
726 snprintf(xdisplay, sizeof(xdisplay), "unix:%s",
727 display + 10);
728 display = xdisplay;
729 }
730 if (options.forward_x11_trusted == 0) {
731 xauthdir = xmalloc(MAXPATHLEN);
732 xauthfile = xmalloc(MAXPATHLEN);
733 strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN);
734 if (mkdtemp(xauthdir) != NULL) {
735 do_unlink = 1;
736 snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile",
737 xauthdir);
738 snprintf(cmd, sizeof(cmd),
739 "%s -f %s generate %s " SSH_X11_PROTO
Damien Miller3df755e2004-03-22 09:34:26 +1100740 " untrusted timeout 1200 2>" _PATH_DEVNULL,
Darren Tucker0a118da2003-10-15 15:54:32 +1000741 options.xauth_location, xauthfile, display);
742 debug2("x11_get_proto: %s", cmd);
743 if (system(cmd) == 0)
744 generated = 1;
745 }
746 }
747 snprintf(cmd, sizeof(cmd),
748 "%s %s%s list %s . 2>" _PATH_DEVNULL,
749 options.xauth_location,
750 generated ? "-f " : "" ,
751 generated ? xauthfile : "",
752 display);
753 debug2("x11_get_proto: %s", cmd);
754 f = popen(cmd, "r");
Damien Millerd3a18572000-06-07 19:55:44 +1000755 if (f && fgets(line, sizeof(line), f) &&
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000756 sscanf(line, "%*s %511s %511s", proto, data) == 2)
Damien Millerd3a18572000-06-07 19:55:44 +1000757 got_data = 1;
758 if (f)
759 pclose(f);
760 }
Darren Tucker0a118da2003-10-15 15:54:32 +1000761
762 if (do_unlink) {
763 unlink(xauthfile);
764 rmdir(xauthdir);
765 }
766 if (xauthdir)
767 xfree(xauthdir);
768 if (xauthfile)
769 xfree(xauthfile);
770
Damien Millerbd483e72000-04-30 10:00:53 +1000771 /*
772 * If we didn't get authentication data, just make up some
773 * data. The forwarding code will check the validity of the
774 * response anyway, and substitute this data. The X11
775 * server, however, will ignore this fake data and use
776 * whatever authentication mechanisms it was using otherwise
777 * for the local connection.
778 */
779 if (!got_data) {
780 u_int32_t rand = 0;
781
Darren Tucker0a118da2003-10-15 15:54:32 +1000782 logit("Warning: No xauth data; "
783 "using fake authentication data for X11 forwarding.");
784 strlcpy(proto, SSH_X11_PROTO, sizeof proto);
Damien Millerbd483e72000-04-30 10:00:53 +1000785 for (i = 0; i < 16; i++) {
786 if (i % 4 == 0)
787 rand = arc4random();
Darren Tucker0a118da2003-10-15 15:54:32 +1000788 snprintf(data + 2 * i, sizeof data - 2 * i, "%02x",
789 rand & 0xff);
Damien Millerbd483e72000-04-30 10:00:53 +1000790 rand >>= 8;
791 }
792 }
793}
794
Ben Lindstrombba81212001-06-25 05:01:22 +0000795static void
Damien Miller0bc1bd82000-11-13 22:57:25 +1100796ssh_init_forwarding(void)
797{
Kevin Steves12057502001-02-05 14:54:34 +0000798 int success = 0;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100799 int i;
Kevin Steves12057502001-02-05 14:54:34 +0000800
Damien Miller0bc1bd82000-11-13 22:57:25 +1100801 /* Initiate local TCP/IP port forwardings. */
802 for (i = 0; i < options.num_local_forwards; i++) {
803 debug("Connections to local port %d forwarded to remote address %.200s:%d",
804 options.local_forwards[i].port,
805 options.local_forwards[i].host,
806 options.local_forwards[i].host_port);
Damien Millerb16461c2002-01-22 23:29:22 +1100807 success += channel_setup_local_fwd_listener(
Damien Miller0bc1bd82000-11-13 22:57:25 +1100808 options.local_forwards[i].port,
809 options.local_forwards[i].host,
810 options.local_forwards[i].host_port,
811 options.gateway_ports);
812 }
Kevin Steves12057502001-02-05 14:54:34 +0000813 if (i > 0 && success == 0)
814 error("Could not request local forwarding.");
Damien Miller0bc1bd82000-11-13 22:57:25 +1100815
816 /* Initiate remote TCP/IP port forwardings. */
817 for (i = 0; i < options.num_remote_forwards; i++) {
818 debug("Connections to remote port %d forwarded to local address %.200s:%d",
819 options.remote_forwards[i].port,
820 options.remote_forwards[i].host,
821 options.remote_forwards[i].host_port);
822 channel_request_remote_forwarding(
823 options.remote_forwards[i].port,
824 options.remote_forwards[i].host,
825 options.remote_forwards[i].host_port);
826 }
827}
828
Ben Lindstrombba81212001-06-25 05:01:22 +0000829static void
Damien Miller0bc1bd82000-11-13 22:57:25 +1100830check_agent_present(void)
831{
832 if (options.forward_agent) {
833 /* Clear agent forwarding if we don\'t have an agent. */
Damien Miller789e95d2002-09-12 09:52:46 +1000834 if (!ssh_agent_present())
Damien Miller0bc1bd82000-11-13 22:57:25 +1100835 options.forward_agent = 0;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100836 }
837}
838
Ben Lindstrombba81212001-06-25 05:01:22 +0000839static int
Damien Miller1383bd82000-04-06 12:32:37 +1000840ssh_session(void)
841{
842 int type;
Damien Miller1383bd82000-04-06 12:32:37 +1000843 int interactive = 0;
844 int have_tty = 0;
845 struct winsize ws;
Damien Miller1383bd82000-04-06 12:32:37 +1000846 char *cp;
847
Damien Miller95def091999-11-25 00:26:21 +1100848 /* Enable compression if requested. */
849 if (options.compression) {
850 debug("Requesting compression at level %d.", options.compression_level);
851
852 if (options.compression_level < 1 || options.compression_level > 9)
853 fatal("Compression level must be from 1 (fast) to 9 (slow, best).");
854
855 /* Send the request. */
856 packet_start(SSH_CMSG_REQUEST_COMPRESSION);
857 packet_put_int(options.compression_level);
858 packet_send();
859 packet_write_wait();
Damien Millerdff50992002-01-22 23:16:32 +1100860 type = packet_read();
Damien Miller95def091999-11-25 00:26:21 +1100861 if (type == SSH_SMSG_SUCCESS)
862 packet_start_compression(options.compression_level);
863 else if (type == SSH_SMSG_FAILURE)
Damien Miller996acd22003-04-09 20:59:48 +1000864 logit("Warning: Remote host refused compression.");
Damien Miller95def091999-11-25 00:26:21 +1100865 else
866 packet_disconnect("Protocol error waiting for compression response.");
867 }
868 /* Allocate a pseudo tty if appropriate. */
869 if (tty_flag) {
870 debug("Requesting pty.");
871
872 /* Start the packet. */
873 packet_start(SSH_CMSG_REQUEST_PTY);
874
875 /* Store TERM in the packet. There is no limit on the
876 length of the string. */
877 cp = getenv("TERM");
878 if (!cp)
879 cp = "";
Ben Lindstrom664408d2001-06-09 01:42:01 +0000880 packet_put_cstring(cp);
Damien Miller95def091999-11-25 00:26:21 +1100881
882 /* Store window size in the packet. */
883 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
884 memset(&ws, 0, sizeof(ws));
885 packet_put_int(ws.ws_row);
886 packet_put_int(ws.ws_col);
887 packet_put_int(ws.ws_xpixel);
888 packet_put_int(ws.ws_ypixel);
889
890 /* Store tty modes in the packet. */
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000891 tty_make_modes(fileno(stdin), NULL);
Damien Miller95def091999-11-25 00:26:21 +1100892
893 /* Send the packet, and wait for it to leave. */
894 packet_send();
895 packet_write_wait();
896
897 /* Read response from the server. */
Damien Millerdff50992002-01-22 23:16:32 +1100898 type = packet_read();
Damien Miller450a7a12000-03-26 13:04:51 +1000899 if (type == SSH_SMSG_SUCCESS) {
Damien Miller95def091999-11-25 00:26:21 +1100900 interactive = 1;
Damien Miller1383bd82000-04-06 12:32:37 +1000901 have_tty = 1;
Damien Miller450a7a12000-03-26 13:04:51 +1000902 } else if (type == SSH_SMSG_FAILURE)
Damien Miller996acd22003-04-09 20:59:48 +1000903 logit("Warning: Remote host failed or refused to allocate a pseudo tty.");
Damien Miller95def091999-11-25 00:26:21 +1100904 else
905 packet_disconnect("Protocol error waiting for pty request response.");
906 }
907 /* Request X11 forwarding if enabled and DISPLAY is set. */
908 if (options.forward_x11 && getenv("DISPLAY") != NULL) {
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000909 char *proto, *data;
Damien Millerbd483e72000-04-30 10:00:53 +1000910 /* Get reasonable local authentication information. */
Ben Lindstrom4a4bd712001-12-06 17:45:19 +0000911 x11_get_proto(&proto, &data);
Damien Millerbd483e72000-04-30 10:00:53 +1000912 /* Request forwarding with authentication spoofing. */
Damien Miller95def091999-11-25 00:26:21 +1100913 debug("Requesting X11 forwarding with authentication spoofing.");
Damien Millerbd483e72000-04-30 10:00:53 +1000914 x11_request_forwarding_with_spoofing(0, proto, data);
Damien Miller95def091999-11-25 00:26:21 +1100915
916 /* Read response from the server. */
Damien Millerdff50992002-01-22 23:16:32 +1100917 type = packet_read();
Damien Miller95def091999-11-25 00:26:21 +1100918 if (type == SSH_SMSG_SUCCESS) {
Damien Miller95def091999-11-25 00:26:21 +1100919 interactive = 1;
Damien Millerbd483e72000-04-30 10:00:53 +1000920 } else if (type == SSH_SMSG_FAILURE) {
Damien Miller996acd22003-04-09 20:59:48 +1000921 logit("Warning: Remote host denied X11 forwarding.");
Damien Millerbd483e72000-04-30 10:00:53 +1000922 } else {
Damien Miller95def091999-11-25 00:26:21 +1100923 packet_disconnect("Protocol error waiting for X11 forwarding");
Damien Millerbd483e72000-04-30 10:00:53 +1000924 }
Damien Miller95def091999-11-25 00:26:21 +1100925 }
926 /* Tell the packet module whether this is an interactive session. */
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000927 packet_set_interactive(interactive);
Damien Miller95def091999-11-25 00:26:21 +1100928
929 /* Request authentication agent forwarding if appropriate. */
Damien Miller0bc1bd82000-11-13 22:57:25 +1100930 check_agent_present();
931
Damien Miller95def091999-11-25 00:26:21 +1100932 if (options.forward_agent) {
933 debug("Requesting authentication agent forwarding.");
934 auth_request_forwarding();
935
936 /* Read response from the server. */
Damien Millerdff50992002-01-22 23:16:32 +1100937 type = packet_read();
Damien Miller48b03fc2002-01-22 23:11:40 +1100938 packet_check_eom();
Damien Miller95def091999-11-25 00:26:21 +1100939 if (type != SSH_SMSG_SUCCESS)
Damien Miller996acd22003-04-09 20:59:48 +1000940 logit("Warning: Remote host denied authentication agent forwarding.");
Damien Miller95def091999-11-25 00:26:21 +1100941 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000942
Damien Miller0bc1bd82000-11-13 22:57:25 +1100943 /* Initiate port forwardings. */
944 ssh_init_forwarding();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000945
Damien Miller5428f641999-11-25 11:54:57 +1100946 /* If requested, let ssh continue in the background. */
Damien Miller4af51302000-04-16 11:18:38 +1000947 if (fork_after_authentication_flag)
Damien Miller5428f641999-11-25 11:54:57 +1100948 if (daemon(1, 1) < 0)
949 fatal("daemon() failed: %.200s", strerror(errno));
950
951 /*
952 * If a command was specified on the command line, execute the
953 * command now. Otherwise request the server to start a shell.
954 */
Damien Miller95def091999-11-25 00:26:21 +1100955 if (buffer_len(&command) > 0) {
956 int len = buffer_len(&command);
957 if (len > 900)
958 len = 900;
Damien Miller5a6b4fe2001-12-21 14:56:54 +1100959 debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
Damien Miller95def091999-11-25 00:26:21 +1100960 packet_start(SSH_CMSG_EXEC_CMD);
961 packet_put_string(buffer_ptr(&command), buffer_len(&command));
962 packet_send();
963 packet_write_wait();
964 } else {
965 debug("Requesting shell.");
966 packet_start(SSH_CMSG_EXEC_SHELL);
967 packet_send();
968 packet_write_wait();
969 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000970
Damien Miller95def091999-11-25 00:26:21 +1100971 /* Enter the interactive session. */
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +0000972 return client_loop(have_tty, tty_flag ?
973 options.escape_char : SSH_ESCAPECHAR_NONE, 0);
Damien Miller1383bd82000-04-06 12:32:37 +1000974}
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000975
Ben Lindstrombba81212001-06-25 05:01:22 +0000976static void
Damien Miller630d6f42002-01-22 23:17:30 +1100977client_subsystem_reply(int type, u_int32_t seq, void *ctxt)
Ben Lindstrom1e7d3062001-02-09 02:36:43 +0000978{
979 int id, len;
980
981 id = packet_get_int();
982 len = buffer_len(&command);
Ben Lindstrom4040fe12001-03-05 06:52:57 +0000983 if (len > 900)
984 len = 900;
Damien Miller48b03fc2002-01-22 23:11:40 +1100985 packet_check_eom();
Ben Lindstrom1e7d3062001-02-09 02:36:43 +0000986 if (type == SSH2_MSG_CHANNEL_FAILURE)
987 fatal("Request for subsystem '%.*s' failed on channel %d",
Damien Miller5a6b4fe2001-12-21 14:56:54 +1100988 len, (u_char *)buffer_ptr(&command), id);
Ben Lindstrom1e7d3062001-02-09 02:36:43 +0000989}
990
Damien Miller2797f7f2002-04-23 21:09:44 +1000991void
Damien Miller509b0102003-12-17 16:33:10 +1100992client_global_request_reply_fwd(int type, u_int32_t seq, void *ctxt)
Damien Miller2797f7f2002-04-23 21:09:44 +1000993{
994 int i;
995
996 i = client_global_request_id++;
Damien Miller509b0102003-12-17 16:33:10 +1100997 if (i >= options.num_remote_forwards)
Damien Miller2797f7f2002-04-23 21:09:44 +1000998 return;
Damien Miller2797f7f2002-04-23 21:09:44 +1000999 debug("remote forward %s for: listen %d, connect %s:%d",
1000 type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure",
1001 options.remote_forwards[i].port,
1002 options.remote_forwards[i].host,
1003 options.remote_forwards[i].host_port);
1004 if (type == SSH2_MSG_REQUEST_FAILURE)
Damien Miller996acd22003-04-09 20:59:48 +10001005 logit("Warning: remote port forwarding failed for listen port %d",
Damien Miller2797f7f2002-04-23 21:09:44 +10001006 options.remote_forwards[i].port);
1007}
1008
Ben Lindstromf558cf62001-09-20 23:13:49 +00001009/* request pty/x11/agent/tcpfwd/shell for channel */
Ben Lindstrombba81212001-06-25 05:01:22 +00001010static void
Ben Lindstromf558cf62001-09-20 23:13:49 +00001011ssh_session2_setup(int id, void *arg)
Damien Miller1383bd82000-04-06 12:32:37 +10001012{
1013 int len;
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001014 int interactive = 0;
Ben Lindstromae8e2d32001-04-14 23:13:02 +00001015 struct termios tio;
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001016
Ben Lindstrom604dc722002-12-23 02:08:57 +00001017 debug2("ssh_session2_setup: id %d", id);
Damien Miller1383bd82000-04-06 12:32:37 +10001018
Damien Miller1383bd82000-04-06 12:32:37 +10001019 if (tty_flag) {
1020 struct winsize ws;
1021 char *cp;
1022 cp = getenv("TERM");
1023 if (!cp)
1024 cp = "";
1025 /* Store window size in the packet. */
1026 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
1027 memset(&ws, 0, sizeof(ws));
1028
1029 channel_request_start(id, "pty-req", 0);
1030 packet_put_cstring(cp);
1031 packet_put_int(ws.ws_col);
1032 packet_put_int(ws.ws_row);
1033 packet_put_int(ws.ws_xpixel);
1034 packet_put_int(ws.ws_ypixel);
Ben Lindstromae8e2d32001-04-14 23:13:02 +00001035 tio = get_saved_tio();
1036 tty_make_modes(/*ignored*/ 0, &tio);
Damien Miller1383bd82000-04-06 12:32:37 +10001037 packet_send();
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001038 interactive = 1;
Damien Miller1383bd82000-04-06 12:32:37 +10001039 /* XXX wait for reply */
1040 }
Damien Millerbd483e72000-04-30 10:00:53 +10001041 if (options.forward_x11 &&
1042 getenv("DISPLAY") != NULL) {
Ben Lindstrom4a4bd712001-12-06 17:45:19 +00001043 char *proto, *data;
Damien Millerbd483e72000-04-30 10:00:53 +10001044 /* Get reasonable local authentication information. */
Ben Lindstrom4a4bd712001-12-06 17:45:19 +00001045 x11_get_proto(&proto, &data);
Damien Millerbd483e72000-04-30 10:00:53 +10001046 /* Request forwarding with authentication spoofing. */
1047 debug("Requesting X11 forwarding with authentication spoofing.");
1048 x11_request_forwarding_with_spoofing(id, proto, data);
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001049 interactive = 1;
Damien Millerbd483e72000-04-30 10:00:53 +10001050 /* XXX wait for reply */
1051 }
1052
Damien Miller0bc1bd82000-11-13 22:57:25 +11001053 check_agent_present();
1054 if (options.forward_agent) {
1055 debug("Requesting authentication agent forwarding.");
1056 channel_request_start(id, "auth-agent-req@openssh.com", 0);
1057 packet_send();
1058 }
1059
Damien Miller1383bd82000-04-06 12:32:37 +10001060 len = buffer_len(&command);
1061 if (len > 0) {
1062 if (len > 900)
1063 len = 900;
Damien Miller832562e2001-01-30 09:30:01 +11001064 if (subsystem_flag) {
Damien Miller5a6b4fe2001-12-21 14:56:54 +11001065 debug("Sending subsystem: %.*s", len, (u_char *)buffer_ptr(&command));
Ben Lindstrom1e7d3062001-02-09 02:36:43 +00001066 channel_request_start(id, "subsystem", /*want reply*/ 1);
1067 /* register callback for reply */
Ben Lindstromf666fec2002-06-06 19:51:58 +00001068 /* XXX we assume that client_loop has already been called */
Ben Lindstrom1e7d3062001-02-09 02:36:43 +00001069 dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &client_subsystem_reply);
1070 dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &client_subsystem_reply);
Damien Miller832562e2001-01-30 09:30:01 +11001071 } else {
Damien Miller5a6b4fe2001-12-21 14:56:54 +11001072 debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
Damien Miller832562e2001-01-30 09:30:01 +11001073 channel_request_start(id, "exec", 0);
1074 }
Ben Lindstrom4040fe12001-03-05 06:52:57 +00001075 packet_put_string(buffer_ptr(&command), buffer_len(&command));
Damien Miller1383bd82000-04-06 12:32:37 +10001076 packet_send();
1077 } else {
Damien Millera500cd62002-02-08 22:04:26 +11001078 channel_request_start(id, "shell", 0);
1079 packet_send();
Damien Miller1383bd82000-04-06 12:32:37 +10001080 }
Ben Lindstrom1e7d3062001-02-09 02:36:43 +00001081
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001082 packet_set_interactive(interactive);
Damien Miller1383bd82000-04-06 12:32:37 +10001083}
1084
Ben Lindstromf558cf62001-09-20 23:13:49 +00001085/* open new channel for a session */
Ben Lindstrombba81212001-06-25 05:01:22 +00001086static int
Ben Lindstromf558cf62001-09-20 23:13:49 +00001087ssh_session2_open(void)
Damien Miller1383bd82000-04-06 12:32:37 +10001088{
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001089 Channel *c;
1090 int window, packetmax, in, out, err;
Damien Millerad833b32000-08-23 10:46:23 +10001091
Damien Millercaf6dd62000-08-29 11:33:50 +11001092 if (stdin_null_flag) {
Ben Lindstrom31ca54a2001-02-09 02:11:24 +00001093 in = open(_PATH_DEVNULL, O_RDONLY);
Damien Millercaf6dd62000-08-29 11:33:50 +11001094 } else {
1095 in = dup(STDIN_FILENO);
1096 }
1097 out = dup(STDOUT_FILENO);
1098 err = dup(STDERR_FILENO);
1099
1100 if (in < 0 || out < 0 || err < 0)
1101 fatal("dup() in/out/err failed");
1102
Damien Miller69b69aa2000-10-28 14:19:58 +11001103 /* enable nonblocking unless tty */
1104 if (!isatty(in))
1105 set_nonblock(in);
1106 if (!isatty(out))
1107 set_nonblock(out);
1108 if (!isatty(err))
1109 set_nonblock(err);
1110
Damien Millere4340be2000-09-16 13:29:08 +11001111 window = CHAN_SES_WINDOW_DEFAULT;
1112 packetmax = CHAN_SES_PACKET_DEFAULT;
Damien Miller19a59452002-02-19 15:20:57 +11001113 if (tty_flag) {
1114 window >>= 1;
1115 packetmax >>= 1;
Damien Miller1383bd82000-04-06 12:32:37 +10001116 }
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001117 c = channel_new(
Damien Miller1383bd82000-04-06 12:32:37 +10001118 "session", SSH_CHANNEL_OPENING, in, out, err,
Damien Millere4340be2000-09-16 13:29:08 +11001119 window, packetmax, CHAN_EXTENDED_WRITE,
Damien Millerb1ca8bb2003-05-14 13:45:42 +10001120 "client-session", /*nonblock*/0);
Damien Miller1383bd82000-04-06 12:32:37 +10001121
Ben Lindstromf558cf62001-09-20 23:13:49 +00001122 debug3("ssh_session2_open: channel_new: %d", c->self);
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001123
Ben Lindstrom5ec26452001-06-09 00:18:51 +00001124 channel_send_open(c->self);
Ben Lindstromf558cf62001-09-20 23:13:49 +00001125 if (!no_shell_flag)
Damien Miller67f0bc02002-02-05 12:23:08 +11001126 channel_register_confirm(c->self, ssh_session2_setup);
Damien Miller1383bd82000-04-06 12:32:37 +10001127
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001128 return c->self;
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001129}
1130
Ben Lindstrombba81212001-06-25 05:01:22 +00001131static int
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001132ssh_session2(void)
1133{
Ben Lindstromf558cf62001-09-20 23:13:49 +00001134 int id = -1;
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001135
1136 /* XXX should be pre-session */
1137 ssh_init_forwarding();
1138
Ben Lindstromf558cf62001-09-20 23:13:49 +00001139 if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN))
1140 id = ssh_session2_open();
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +00001141
1142 /* If requested, let ssh continue in the background. */
1143 if (fork_after_authentication_flag)
1144 if (daemon(1, 1) < 0)
1145 fatal("daemon() failed: %.200s", strerror(errno));
1146
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +00001147 return client_loop(tty_flag, tty_flag ?
1148 options.escape_char : SSH_ESCAPECHAR_NONE, id);
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001149}
Damien Miller0bc1bd82000-11-13 22:57:25 +11001150
Ben Lindstrombba81212001-06-25 05:01:22 +00001151static void
Ben Lindstrom266dfdf2001-03-09 00:12:22 +00001152load_public_identity_files(void)
1153{
1154 char *filename;
Ben Lindstrom711b04a2001-08-06 21:12:42 +00001155 int i = 0;
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001156 Key *public;
Ben Lindstrom711b04a2001-08-06 21:12:42 +00001157#ifdef SMARTCARD
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001158 Key **keys;
1159
Ben Lindstromf7db3bb2001-08-06 21:35:51 +00001160 if (options.smartcard_device != NULL &&
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001161 options.num_identity_files < SSH_MAX_IDENTITY_FILES &&
1162 (keys = sc_get_keys(options.smartcard_device, NULL)) != NULL ) {
1163 int count = 0;
1164 for (i = 0; keys[i] != NULL; i++) {
1165 count++;
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001166 memmove(&options.identity_files[1], &options.identity_files[0],
1167 sizeof(char *) * (SSH_MAX_IDENTITY_FILES - 1));
1168 memmove(&options.identity_keys[1], &options.identity_keys[0],
1169 sizeof(Key *) * (SSH_MAX_IDENTITY_FILES - 1));
1170 options.num_identity_files++;
1171 options.identity_keys[0] = keys[i];
Damien Miller56a0bb02003-06-18 20:28:40 +10001172 options.identity_files[0] = sc_get_key_label(keys[i]);
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001173 }
Ben Lindstrom4f054602002-03-26 03:23:00 +00001174 if (options.num_identity_files > SSH_MAX_IDENTITY_FILES)
1175 options.num_identity_files = SSH_MAX_IDENTITY_FILES;
Ben Lindstrom0936a5b2002-03-26 03:17:42 +00001176 i = count;
1177 xfree(keys);
Ben Lindstrom711b04a2001-08-06 21:12:42 +00001178 }
Ben Lindstromffce1472001-08-06 21:57:31 +00001179#endif /* SMARTCARD */
Ben Lindstrom711b04a2001-08-06 21:12:42 +00001180 for (; i < options.num_identity_files; i++) {
Ben Lindstrom266dfdf2001-03-09 00:12:22 +00001181 filename = tilde_expand_filename(options.identity_files[i],
1182 original_real_uid);
Ben Lindstromd0fca422001-03-26 13:44:06 +00001183 public = key_load_public(filename, NULL);
Ben Lindstrom266dfdf2001-03-09 00:12:22 +00001184 debug("identity file %s type %d", filename,
1185 public ? public->type : -1);
1186 xfree(options.identity_files[i]);
1187 options.identity_files[i] = filename;
1188 options.identity_keys[i] = public;
1189 }
1190}