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1 | /* | |
2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5 | * 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 | * | |
9 | * 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. | |
16 | * Copyright (c) 2000, 2001, 2002, 2003 Markus Friedl. All rights reserved. | |
17 | * | |
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. | |
40 | */ | |
41 | ||
42 | #include "includes.h" | |
43 | RCSID("$OpenBSD: ssh.c,v 1.208 2004/03/10 09:45:06 markus Exp $"); | |
44 | ||
45 | #include <openssl/evp.h> | |
46 | #include <openssl/err.h> | |
47 | ||
48 | #include "ssh.h" | |
49 | #include "ssh1.h" | |
50 | #include "ssh2.h" | |
51 | #include "compat.h" | |
52 | #include "cipher.h" | |
53 | #include "xmalloc.h" | |
54 | #include "packet.h" | |
55 | #include "buffer.h" | |
56 | #include "channels.h" | |
57 | #include "key.h" | |
58 | #include "authfd.h" | |
59 | #include "authfile.h" | |
60 | #include "pathnames.h" | |
61 | #include "clientloop.h" | |
62 | #include "log.h" | |
63 | #include "readconf.h" | |
64 | #include "sshconnect.h" | |
65 | #include "tildexpand.h" | |
66 | #include "dispatch.h" | |
67 | #include "misc.h" | |
68 | #include "kex.h" | |
69 | #include "mac.h" | |
70 | #include "sshtty.h" | |
71 | ||
72 | #ifdef SMARTCARD | |
73 | #include "scard.h" | |
74 | #endif | |
75 | ||
76 | #ifdef HAVE___PROGNAME | |
77 | extern char *__progname; | |
78 | #else | |
79 | char *__progname; | |
80 | #endif | |
81 | ||
82 | /* Flag indicating whether debug mode is on. This can be set on the command line. */ | |
83 | int debug_flag = 0; | |
84 | ||
85 | /* Flag indicating whether a tty should be allocated */ | |
86 | int tty_flag = 0; | |
87 | int no_tty_flag = 0; | |
88 | int force_tty_flag = 0; | |
89 | ||
90 | /* don't exec a shell */ | |
91 | int no_shell_flag = 0; | |
92 | ||
93 | /* | |
94 | * Flag indicating that nothing should be read from stdin. This can be set | |
95 | * on the command line. | |
96 | */ | |
97 | int stdin_null_flag = 0; | |
98 | ||
99 | /* | |
100 | * Flag indicating that ssh should fork after authentication. This is useful | |
101 | * so that the passphrase can be entered manually, and then ssh goes to the | |
102 | * background. | |
103 | */ | |
104 | int fork_after_authentication_flag = 0; | |
105 | ||
106 | /* | |
107 | * General data structure for command line options and options configurable | |
108 | * in configuration files. See readconf.h. | |
109 | */ | |
110 | Options options; | |
111 | ||
112 | /* optional user configfile */ | |
113 | char *config = NULL; | |
114 | ||
115 | /* | |
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 | */ | |
120 | char *host; | |
121 | ||
122 | /* socket address the host resolves to */ | |
123 | struct sockaddr_storage hostaddr; | |
124 | ||
125 | /* Private host keys. */ | |
126 | Sensitive sensitive_data; | |
127 | ||
128 | /* Original real UID. */ | |
129 | uid_t original_real_uid; | |
130 | uid_t original_effective_uid; | |
131 | ||
132 | /* command to be executed */ | |
133 | Buffer command; | |
134 | ||
135 | /* Should we execute a command or invoke a subsystem? */ | |
136 | int subsystem_flag = 0; | |
137 | ||
138 | /* # of replies received for global requests */ | |
139 | static int client_global_request_id = 0; | |
140 | ||
141 | /* pid of proxycommand child process */ | |
142 | pid_t proxy_command_pid = 0; | |
143 | ||
144 | /* Prints a help message to the user. This function never returns. */ | |
145 | ||
146 | static void | |
147 | usage(void) | |
148 | { | |
149 | 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 | ); | |
155 | exit(1); | |
156 | } | |
157 | ||
158 | static int ssh_session(void); | |
159 | static int ssh_session2(void); | |
160 | static void load_public_identity_files(void); | |
161 | ||
162 | /* | |
163 | * Main program for the ssh client. | |
164 | */ | |
165 | int | |
166 | main(int ac, char **av) | |
167 | { | |
168 | int i, opt, exit_status; | |
169 | u_short fwd_port, fwd_host_port; | |
170 | char sfwd_port[6], sfwd_host_port[6]; | |
171 | char *p, *cp, *line, buf[256]; | |
172 | struct stat st; | |
173 | struct passwd *pw; | |
174 | int dummy; | |
175 | extern int optind, optreset; | |
176 | extern char *optarg; | |
177 | ||
178 | __progname = ssh_get_progname(av[0]); | |
179 | init_rng(); | |
180 | ||
181 | /* | |
182 | * Save the original real uid. It will be needed later (uid-swapping | |
183 | * may clobber the real uid). | |
184 | */ | |
185 | original_real_uid = getuid(); | |
186 | original_effective_uid = geteuid(); | |
187 | ||
188 | /* | |
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; | |
196 | ||
197 | #ifdef HAVE_SETRLIMIT | |
198 | /* 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)); | |
204 | } | |
205 | #endif | |
206 | /* Get user data. */ | |
207 | pw = getpwuid(original_real_uid); | |
208 | if (!pw) { | |
209 | logit("You don't exist, go away!"); | |
210 | exit(1); | |
211 | } | |
212 | /* Take a copy of the returned structure. */ | |
213 | pw = pwcopy(pw); | |
214 | ||
215 | /* | |
216 | * 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 | */ | |
221 | umask(022); | |
222 | ||
223 | /* Initialize option structure to indicate that no values have been set. */ | |
224 | initialize_options(&options); | |
225 | ||
226 | /* Parse command-line arguments. */ | |
227 | host = NULL; | |
228 | ||
229 | again: | |
230 | while ((opt = getopt(ac, av, | |
231 | "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:NPR:TVXY")) != -1) { | |
232 | switch (opt) { | |
233 | case '1': | |
234 | options.protocol = SSH_PROTO_1; | |
235 | break; | |
236 | case '2': | |
237 | options.protocol = SSH_PROTO_2; | |
238 | break; | |
239 | case '4': | |
240 | options.address_family = AF_INET; | |
241 | break; | |
242 | case '6': | |
243 | options.address_family = AF_INET6; | |
244 | break; | |
245 | case 'n': | |
246 | stdin_null_flag = 1; | |
247 | break; | |
248 | case 'f': | |
249 | fork_after_authentication_flag = 1; | |
250 | stdin_null_flag = 1; | |
251 | break; | |
252 | case 'x': | |
253 | options.forward_x11 = 0; | |
254 | break; | |
255 | case 'X': | |
256 | options.forward_x11 = 1; | |
257 | break; | |
258 | case 'Y': | |
259 | options.forward_x11 = 1; | |
260 | options.forward_x11_trusted = 1; | |
261 | break; | |
262 | case 'g': | |
263 | options.gateway_ports = 1; | |
264 | break; | |
265 | case 'P': /* deprecated */ | |
266 | options.use_privileged_port = 0; | |
267 | break; | |
268 | case 'a': | |
269 | options.forward_agent = 0; | |
270 | break; | |
271 | case 'A': | |
272 | options.forward_agent = 1; | |
273 | break; | |
274 | case 'k': | |
275 | options.gss_deleg_creds = 0; | |
276 | break; | |
277 | case 'i': | |
278 | if (stat(optarg, &st) < 0) { | |
279 | fprintf(stderr, "Warning: Identity file %s " | |
280 | "does not exist.\n", optarg); | |
281 | break; | |
282 | } | |
283 | 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); | |
289 | break; | |
290 | case 'I': | |
291 | #ifdef SMARTCARD | |
292 | options.smartcard_device = xstrdup(optarg); | |
293 | #else | |
294 | fprintf(stderr, "no support for smartcards.\n"); | |
295 | #endif | |
296 | break; | |
297 | case 't': | |
298 | if (tty_flag) | |
299 | force_tty_flag = 1; | |
300 | tty_flag = 1; | |
301 | break; | |
302 | case 'v': | |
303 | if (debug_flag == 0) { | |
304 | debug_flag = 1; | |
305 | options.log_level = SYSLOG_LEVEL_DEBUG1; | |
306 | } else { | |
307 | if (options.log_level < SYSLOG_LEVEL_DEBUG3) | |
308 | options.log_level++; | |
309 | break; | |
310 | } | |
311 | /* fallthrough */ | |
312 | case 'V': | |
313 | fprintf(stderr, | |
314 | "%s, SSH protocols %d.%d/%d.%d, %s\n", | |
315 | SSH_VERSION, | |
316 | PROTOCOL_MAJOR_1, PROTOCOL_MINOR_1, | |
317 | PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, | |
318 | SSLeay_version(SSLEAY_VERSION)); | |
319 | if (opt == 'V') | |
320 | exit(0); | |
321 | break; | |
322 | case 'q': | |
323 | options.log_level = SYSLOG_LEVEL_QUIET; | |
324 | break; | |
325 | case 'e': | |
326 | if (optarg[0] == '^' && optarg[2] == 0 && | |
327 | (u_char) optarg[1] >= 64 && | |
328 | (u_char) optarg[1] < 128) | |
329 | options.escape_char = (u_char) optarg[1] & 31; | |
330 | else if (strlen(optarg) == 1) | |
331 | options.escape_char = (u_char) optarg[0]; | |
332 | else if (strcmp(optarg, "none") == 0) | |
333 | options.escape_char = SSH_ESCAPECHAR_NONE; | |
334 | else { | |
335 | fprintf(stderr, "Bad escape character '%s'.\n", | |
336 | optarg); | |
337 | exit(1); | |
338 | } | |
339 | break; | |
340 | case 'c': | |
341 | if (ciphers_valid(optarg)) { | |
342 | /* SSH2 only */ | |
343 | options.ciphers = xstrdup(optarg); | |
344 | options.cipher = SSH_CIPHER_ILLEGAL; | |
345 | } else { | |
346 | /* SSH1 only */ | |
347 | options.cipher = cipher_number(optarg); | |
348 | if (options.cipher == -1) { | |
349 | fprintf(stderr, | |
350 | "Unknown cipher type '%s'\n", | |
351 | optarg); | |
352 | exit(1); | |
353 | } | |
354 | if (options.cipher == SSH_CIPHER_3DES) | |
355 | options.ciphers = "3des-cbc"; | |
356 | else if (options.cipher == SSH_CIPHER_BLOWFISH) | |
357 | options.ciphers = "blowfish-cbc"; | |
358 | else | |
359 | options.ciphers = (char *)-1; | |
360 | } | |
361 | break; | |
362 | case 'm': | |
363 | if (mac_valid(optarg)) | |
364 | options.macs = xstrdup(optarg); | |
365 | else { | |
366 | fprintf(stderr, "Unknown mac type '%s'\n", | |
367 | optarg); | |
368 | exit(1); | |
369 | } | |
370 | break; | |
371 | case 'p': | |
372 | options.port = a2port(optarg); | |
373 | if (options.port == 0) { | |
374 | fprintf(stderr, "Bad port '%s'\n", optarg); | |
375 | exit(1); | |
376 | } | |
377 | break; | |
378 | case 'l': | |
379 | options.user = optarg; | |
380 | break; | |
381 | ||
382 | case 'L': | |
383 | case 'R': | |
384 | if (sscanf(optarg, "%5[0123456789]:%255[^:]:%5[0123456789]", | |
385 | sfwd_port, buf, sfwd_host_port) != 3 && | |
386 | sscanf(optarg, "%5[0123456789]/%255[^/]/%5[0123456789]", | |
387 | sfwd_port, buf, sfwd_host_port) != 3) { | |
388 | fprintf(stderr, | |
389 | "Bad forwarding specification '%s'\n", | |
390 | optarg); | |
391 | usage(); | |
392 | /* NOTREACHED */ | |
393 | } | |
394 | if ((fwd_port = a2port(sfwd_port)) == 0 || | |
395 | (fwd_host_port = a2port(sfwd_host_port)) == 0) { | |
396 | fprintf(stderr, | |
397 | "Bad forwarding port(s) '%s'\n", optarg); | |
398 | exit(1); | |
399 | } | |
400 | if (opt == 'L') | |
401 | add_local_forward(&options, fwd_port, buf, | |
402 | fwd_host_port); | |
403 | else if (opt == 'R') | |
404 | add_remote_forward(&options, fwd_port, buf, | |
405 | fwd_host_port); | |
406 | break; | |
407 | ||
408 | case 'D': | |
409 | fwd_port = a2port(optarg); | |
410 | if (fwd_port == 0) { | |
411 | fprintf(stderr, "Bad dynamic port '%s'\n", | |
412 | optarg); | |
413 | exit(1); | |
414 | } | |
415 | add_local_forward(&options, fwd_port, "socks", 0); | |
416 | break; | |
417 | ||
418 | case 'C': | |
419 | options.compression = 1; | |
420 | break; | |
421 | case 'N': | |
422 | no_shell_flag = 1; | |
423 | no_tty_flag = 1; | |
424 | break; | |
425 | case 'T': | |
426 | no_tty_flag = 1; | |
427 | break; | |
428 | case 'o': | |
429 | dummy = 1; | |
430 | line = xstrdup(optarg); | |
431 | if (process_config_line(&options, host ? host : "", | |
432 | line, "command-line", 0, &dummy) != 0) | |
433 | exit(1); | |
434 | xfree(line); | |
435 | break; | |
436 | case 's': | |
437 | subsystem_flag = 1; | |
438 | break; | |
439 | case 'b': | |
440 | options.bind_address = optarg; | |
441 | break; | |
442 | case 'F': | |
443 | config = optarg; | |
444 | break; | |
445 | default: | |
446 | usage(); | |
447 | } | |
448 | } | |
449 | ||
450 | ac -= optind; | |
451 | av += optind; | |
452 | ||
453 | if (ac > 0 && !host && **av != '-') { | |
454 | if (strrchr(*av, '@')) { | |
455 | p = xstrdup(*av); | |
456 | cp = strrchr(p, '@'); | |
457 | if (cp == NULL || cp == p) | |
458 | usage(); | |
459 | options.user = p; | |
460 | *cp = '\0'; | |
461 | host = ++cp; | |
462 | } else | |
463 | host = *av; | |
464 | if (ac > 1) { | |
465 | optind = optreset = 1; | |
466 | goto again; | |
467 | } | |
468 | ac--, av++; | |
469 | } | |
470 | ||
471 | /* Check that we got a host name. */ | |
472 | if (!host) | |
473 | usage(); | |
474 | ||
475 | SSLeay_add_all_algorithms(); | |
476 | ERR_load_crypto_strings(); | |
477 | ||
478 | /* Initialize the command to execute on remote host. */ | |
479 | buffer_init(&command); | |
480 | ||
481 | /* | |
482 | * Save the command to execute on the remote host in a buffer. There | |
483 | * is no limit on the length of the command, except by the maximum | |
484 | * packet size. Also sets the tty flag if there is no command. | |
485 | */ | |
486 | if (!ac) { | |
487 | /* No command specified - execute shell on a tty. */ | |
488 | tty_flag = 1; | |
489 | if (subsystem_flag) { | |
490 | fprintf(stderr, | |
491 | "You must specify a subsystem to invoke.\n"); | |
492 | usage(); | |
493 | } | |
494 | } else { | |
495 | /* A command has been specified. Store it into the buffer. */ | |
496 | for (i = 0; i < ac; i++) { | |
497 | if (i) | |
498 | buffer_append(&command, " ", 1); | |
499 | buffer_append(&command, av[i], strlen(av[i])); | |
500 | } | |
501 | } | |
502 | ||
503 | /* Cannot fork to background if no command. */ | |
504 | if (fork_after_authentication_flag && buffer_len(&command) == 0 && !no_shell_flag) | |
505 | fatal("Cannot fork into background without a command to execute."); | |
506 | ||
507 | /* Allocate a tty by default if no command specified. */ | |
508 | if (buffer_len(&command) == 0) | |
509 | tty_flag = 1; | |
510 | ||
511 | /* Force no tty */ | |
512 | if (no_tty_flag) | |
513 | tty_flag = 0; | |
514 | /* Do not allocate a tty if stdin is not a tty. */ | |
515 | if (!isatty(fileno(stdin)) && !force_tty_flag) { | |
516 | if (tty_flag) | |
517 | logit("Pseudo-terminal will not be allocated because stdin is not a terminal."); | |
518 | tty_flag = 0; | |
519 | } | |
520 | ||
521 | /* | |
522 | * Initialize "log" output. Since we are the client all output | |
523 | * actually goes to stderr. | |
524 | */ | |
525 | log_init(av[0], options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level, | |
526 | SYSLOG_FACILITY_USER, 1); | |
527 | ||
528 | /* | |
529 | * Read per-user configuration file. Ignore the system wide config | |
530 | * file if the user specifies a config file on the command line. | |
531 | */ | |
532 | if (config != NULL) { | |
533 | if (!read_config_file(config, host, &options)) | |
534 | fatal("Can't open user config file %.100s: " | |
535 | "%.100s", config, strerror(errno)); | |
536 | } else { | |
537 | snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir, | |
538 | _PATH_SSH_USER_CONFFILE); | |
539 | (void)read_config_file(buf, host, &options); | |
540 | ||
541 | /* Read systemwide configuration file after use config. */ | |
542 | (void)read_config_file(_PATH_HOST_CONFIG_FILE, host, &options); | |
543 | } | |
544 | ||
545 | /* Fill configuration defaults. */ | |
546 | fill_default_options(&options); | |
547 | ||
548 | channel_set_af(options.address_family); | |
549 | ||
550 | /* reinit */ | |
551 | log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1); | |
552 | ||
553 | seed_rng(); | |
554 | ||
555 | if (options.user == NULL) | |
556 | options.user = xstrdup(pw->pw_name); | |
557 | ||
558 | if (options.hostname != NULL) | |
559 | host = options.hostname; | |
560 | ||
561 | /* force lowercase for hostkey matching */ | |
562 | if (options.host_key_alias != NULL) { | |
563 | for (p = options.host_key_alias; *p; p++) | |
564 | if (isupper(*p)) | |
565 | *p = tolower(*p); | |
566 | } | |
567 | ||
568 | if (options.proxy_command != NULL && | |
569 | strcmp(options.proxy_command, "none") == 0) | |
570 | options.proxy_command = NULL; | |
571 | ||
572 | /* Open a connection to the remote host. */ | |
573 | if (ssh_connect(host, &hostaddr, options.port, | |
574 | options.address_family, options.connection_attempts, | |
575 | #ifdef HAVE_CYGWIN | |
576 | options.use_privileged_port, | |
577 | #else | |
578 | original_effective_uid == 0 && options.use_privileged_port, | |
579 | #endif | |
580 | options.proxy_command) != 0) | |
581 | exit(1); | |
582 | ||
583 | /* | |
584 | * If we successfully made the connection, load the host private key | |
585 | * in case we will need it later for combined rsa-rhosts | |
586 | * authentication. This must be done before releasing extra | |
587 | * privileges, because the file is only readable by root. | |
588 | * If we cannot access the private keys, load the public keys | |
589 | * instead and try to execute the ssh-keysign helper instead. | |
590 | */ | |
591 | sensitive_data.nkeys = 0; | |
592 | sensitive_data.keys = NULL; | |
593 | sensitive_data.external_keysign = 0; | |
594 | if (options.rhosts_rsa_authentication || | |
595 | options.hostbased_authentication) { | |
596 | sensitive_data.nkeys = 3; | |
597 | sensitive_data.keys = xmalloc(sensitive_data.nkeys * | |
598 | sizeof(Key)); | |
599 | ||
600 | PRIV_START; | |
601 | sensitive_data.keys[0] = key_load_private_type(KEY_RSA1, | |
602 | _PATH_HOST_KEY_FILE, "", NULL); | |
603 | sensitive_data.keys[1] = key_load_private_type(KEY_DSA, | |
604 | _PATH_HOST_DSA_KEY_FILE, "", NULL); | |
605 | sensitive_data.keys[2] = key_load_private_type(KEY_RSA, | |
606 | _PATH_HOST_RSA_KEY_FILE, "", NULL); | |
607 | PRIV_END; | |
608 | ||
609 | if (options.hostbased_authentication == 1 && | |
610 | sensitive_data.keys[0] == NULL && | |
611 | sensitive_data.keys[1] == NULL && | |
612 | sensitive_data.keys[2] == NULL) { | |
613 | sensitive_data.keys[1] = key_load_public( | |
614 | _PATH_HOST_DSA_KEY_FILE, NULL); | |
615 | sensitive_data.keys[2] = key_load_public( | |
616 | _PATH_HOST_RSA_KEY_FILE, NULL); | |
617 | sensitive_data.external_keysign = 1; | |
618 | } | |
619 | } | |
620 | /* | |
621 | * Get rid of any extra privileges that we may have. We will no | |
622 | * longer need them. Also, extra privileges could make it very hard | |
623 | * to read identity files and other non-world-readable files from the | |
624 | * user's home directory if it happens to be on a NFS volume where | |
625 | * root is mapped to nobody. | |
626 | */ | |
627 | seteuid(original_real_uid); | |
628 | setuid(original_real_uid); | |
629 | ||
630 | /* | |
631 | * Now that we are back to our own permissions, create ~/.ssh | |
632 | * directory if it doesn\'t already exist. | |
633 | */ | |
634 | snprintf(buf, sizeof buf, "%.100s%s%.100s", pw->pw_dir, strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR); | |
635 | if (stat(buf, &st) < 0) | |
636 | if (mkdir(buf, 0700) < 0) | |
637 | error("Could not create directory '%.200s'.", buf); | |
638 | ||
639 | /* load options.identity_files */ | |
640 | load_public_identity_files(); | |
641 | ||
642 | /* Expand ~ in known host file names. */ | |
643 | /* XXX mem-leaks: */ | |
644 | options.system_hostfile = | |
645 | tilde_expand_filename(options.system_hostfile, original_real_uid); | |
646 | options.user_hostfile = | |
647 | tilde_expand_filename(options.user_hostfile, original_real_uid); | |
648 | options.system_hostfile2 = | |
649 | tilde_expand_filename(options.system_hostfile2, original_real_uid); | |
650 | options.user_hostfile2 = | |
651 | tilde_expand_filename(options.user_hostfile2, original_real_uid); | |
652 | ||
653 | signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */ | |
654 | ||
655 | /* Log into the remote system. This never returns if the login fails. */ | |
656 | ssh_login(&sensitive_data, host, (struct sockaddr *)&hostaddr, pw); | |
657 | ||
658 | /* We no longer need the private host keys. Clear them now. */ | |
659 | if (sensitive_data.nkeys != 0) { | |
660 | for (i = 0; i < sensitive_data.nkeys; i++) { | |
661 | if (sensitive_data.keys[i] != NULL) { | |
662 | /* Destroys contents safely */ | |
663 | debug3("clear hostkey %d", i); | |
664 | key_free(sensitive_data.keys[i]); | |
665 | sensitive_data.keys[i] = NULL; | |
666 | } | |
667 | } | |
668 | xfree(sensitive_data.keys); | |
669 | } | |
670 | for (i = 0; i < options.num_identity_files; i++) { | |
671 | if (options.identity_files[i]) { | |
672 | xfree(options.identity_files[i]); | |
673 | options.identity_files[i] = NULL; | |
674 | } | |
675 | if (options.identity_keys[i]) { | |
676 | key_free(options.identity_keys[i]); | |
677 | options.identity_keys[i] = NULL; | |
678 | } | |
679 | } | |
680 | ||
681 | exit_status = compat20 ? ssh_session2() : ssh_session(); | |
682 | packet_close(); | |
683 | ||
684 | /* | |
685 | * Send SIGHUP to proxy command if used. We don't wait() in | |
686 | * case it hangs and instead rely on init to reap the child | |
687 | */ | |
688 | if (proxy_command_pid > 1) | |
689 | kill(proxy_command_pid, SIGHUP); | |
690 | ||
691 | return exit_status; | |
692 | } | |
693 | ||
694 | #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" | |
695 | ||
696 | static void | |
697 | x11_get_proto(char **_proto, char **_data) | |
698 | { | |
699 | char cmd[1024]; | |
700 | char line[512]; | |
701 | char xdisplay[512]; | |
702 | static char proto[512], data[512]; | |
703 | FILE *f; | |
704 | int got_data = 0, generated = 0, do_unlink = 0, i; | |
705 | char *display, *xauthdir, *xauthfile; | |
706 | struct stat st; | |
707 | ||
708 | xauthdir = xauthfile = NULL; | |
709 | *_proto = proto; | |
710 | *_data = data; | |
711 | proto[0] = data[0] = '\0'; | |
712 | ||
713 | if (!options.xauth_location || | |
714 | (stat(options.xauth_location, &st) == -1)) { | |
715 | debug("No xauth program."); | |
716 | } else { | |
717 | if ((display = getenv("DISPLAY")) == NULL) { | |
718 | debug("x11_get_proto: DISPLAY not set"); | |
719 | return; | |
720 | } | |
721 | /* | |
722 | * Handle FamilyLocal case where $DISPLAY does | |
723 | * not match an authorization entry. For this we | |
724 | * just try "xauth list unix:displaynum.screennum". | |
725 | * XXX: "localhost" match to determine FamilyLocal | |
726 | * is not perfect. | |
727 | */ | |
728 | if (strncmp(display, "localhost:", 10) == 0) { | |
729 | snprintf(xdisplay, sizeof(xdisplay), "unix:%s", | |
730 | display + 10); | |
731 | display = xdisplay; | |
732 | } | |
733 | if (options.forward_x11_trusted == 0) { | |
734 | xauthdir = xmalloc(MAXPATHLEN); | |
735 | xauthfile = xmalloc(MAXPATHLEN); | |
736 | strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN); | |
737 | if (mkdtemp(xauthdir) != NULL) { | |
738 | do_unlink = 1; | |
739 | snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", | |
740 | xauthdir); | |
741 | snprintf(cmd, sizeof(cmd), | |
742 | "%s -f %s generate %s " SSH_X11_PROTO | |
743 | " untrusted timeout 1200 2>" _PATH_DEVNULL, | |
744 | options.xauth_location, xauthfile, display); | |
745 | debug2("x11_get_proto: %s", cmd); | |
746 | if (system(cmd) == 0) | |
747 | generated = 1; | |
748 | } | |
749 | } | |
750 | snprintf(cmd, sizeof(cmd), | |
751 | "%s %s%s list %s . 2>" _PATH_DEVNULL, | |
752 | options.xauth_location, | |
753 | generated ? "-f " : "" , | |
754 | generated ? xauthfile : "", | |
755 | display); | |
756 | debug2("x11_get_proto: %s", cmd); | |
757 | f = popen(cmd, "r"); | |
758 | if (f && fgets(line, sizeof(line), f) && | |
759 | sscanf(line, "%*s %511s %511s", proto, data) == 2) | |
760 | got_data = 1; | |
761 | if (f) | |
762 | pclose(f); | |
763 | } | |
764 | ||
765 | if (do_unlink) { | |
766 | unlink(xauthfile); | |
767 | rmdir(xauthdir); | |
768 | } | |
769 | if (xauthdir) | |
770 | xfree(xauthdir); | |
771 | if (xauthfile) | |
772 | xfree(xauthfile); | |
773 | ||
774 | /* | |
775 | * If we didn't get authentication data, just make up some | |
776 | * data. The forwarding code will check the validity of the | |
777 | * response anyway, and substitute this data. The X11 | |
778 | * server, however, will ignore this fake data and use | |
779 | * whatever authentication mechanisms it was using otherwise | |
780 | * for the local connection. | |
781 | */ | |
782 | if (!got_data) { | |
783 | u_int32_t rand = 0; | |
784 | ||
785 | logit("Warning: No xauth data; " | |
786 | "using fake authentication data for X11 forwarding."); | |
787 | strlcpy(proto, SSH_X11_PROTO, sizeof proto); | |
788 | for (i = 0; i < 16; i++) { | |
789 | if (i % 4 == 0) | |
790 | rand = arc4random(); | |
791 | snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", | |
792 | rand & 0xff); | |
793 | rand >>= 8; | |
794 | } | |
795 | } | |
796 | } | |
797 | ||
798 | static void | |
799 | ssh_init_forwarding(void) | |
800 | { | |
801 | int success = 0; | |
802 | int i; | |
803 | ||
804 | /* Initiate local TCP/IP port forwardings. */ | |
805 | for (i = 0; i < options.num_local_forwards; i++) { | |
806 | debug("Connections to local port %d forwarded to remote address %.200s:%d", | |
807 | options.local_forwards[i].port, | |
808 | options.local_forwards[i].host, | |
809 | options.local_forwards[i].host_port); | |
810 | success += channel_setup_local_fwd_listener( | |
811 | options.local_forwards[i].port, | |
812 | options.local_forwards[i].host, | |
813 | options.local_forwards[i].host_port, | |
814 | options.gateway_ports); | |
815 | } | |
816 | if (i > 0 && success == 0) | |
817 | error("Could not request local forwarding."); | |
818 | ||
819 | /* Initiate remote TCP/IP port forwardings. */ | |
820 | for (i = 0; i < options.num_remote_forwards; i++) { | |
821 | debug("Connections to remote port %d forwarded to local address %.200s:%d", | |
822 | options.remote_forwards[i].port, | |
823 | options.remote_forwards[i].host, | |
824 | options.remote_forwards[i].host_port); | |
825 | channel_request_remote_forwarding( | |
826 | options.remote_forwards[i].port, | |
827 | options.remote_forwards[i].host, | |
828 | options.remote_forwards[i].host_port); | |
829 | } | |
830 | } | |
831 | ||
832 | static void | |
833 | check_agent_present(void) | |
834 | { | |
835 | if (options.forward_agent) { | |
836 | /* Clear agent forwarding if we don\'t have an agent. */ | |
837 | if (!ssh_agent_present()) | |
838 | options.forward_agent = 0; | |
839 | } | |
840 | } | |
841 | ||
842 | static int | |
843 | ssh_session(void) | |
844 | { | |
845 | int type; | |
846 | int interactive = 0; | |
847 | int have_tty = 0; | |
848 | struct winsize ws; | |
849 | char *cp; | |
850 | ||
851 | /* Enable compression if requested. */ | |
852 | if (options.compression) { | |
853 | debug("Requesting compression at level %d.", options.compression_level); | |
854 | ||
855 | if (options.compression_level < 1 || options.compression_level > 9) | |
856 | fatal("Compression level must be from 1 (fast) to 9 (slow, best)."); | |
857 | ||
858 | /* Send the request. */ | |
859 | packet_start(SSH_CMSG_REQUEST_COMPRESSION); | |
860 | packet_put_int(options.compression_level); | |
861 | packet_send(); | |
862 | packet_write_wait(); | |
863 | type = packet_read(); | |
864 | if (type == SSH_SMSG_SUCCESS) | |
865 | packet_start_compression(options.compression_level); | |
866 | else if (type == SSH_SMSG_FAILURE) | |
867 | logit("Warning: Remote host refused compression."); | |
868 | else | |
869 | packet_disconnect("Protocol error waiting for compression response."); | |
870 | } | |
871 | /* Allocate a pseudo tty if appropriate. */ | |
872 | if (tty_flag) { | |
873 | debug("Requesting pty."); | |
874 | ||
875 | /* Start the packet. */ | |
876 | packet_start(SSH_CMSG_REQUEST_PTY); | |
877 | ||
878 | /* Store TERM in the packet. There is no limit on the | |
879 | length of the string. */ | |
880 | cp = getenv("TERM"); | |
881 | if (!cp) | |
882 | cp = ""; | |
883 | packet_put_cstring(cp); | |
884 | ||
885 | /* Store window size in the packet. */ | |
886 | if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) | |
887 | memset(&ws, 0, sizeof(ws)); | |
888 | packet_put_int(ws.ws_row); | |
889 | packet_put_int(ws.ws_col); | |
890 | packet_put_int(ws.ws_xpixel); | |
891 | packet_put_int(ws.ws_ypixel); | |
892 | ||
893 | /* Store tty modes in the packet. */ | |
894 | tty_make_modes(fileno(stdin), NULL); | |
895 | ||
896 | /* Send the packet, and wait for it to leave. */ | |
897 | packet_send(); | |
898 | packet_write_wait(); | |
899 | ||
900 | /* Read response from the server. */ | |
901 | type = packet_read(); | |
902 | if (type == SSH_SMSG_SUCCESS) { | |
903 | interactive = 1; | |
904 | have_tty = 1; | |
905 | } else if (type == SSH_SMSG_FAILURE) | |
906 | logit("Warning: Remote host failed or refused to allocate a pseudo tty."); | |
907 | else | |
908 | packet_disconnect("Protocol error waiting for pty request response."); | |
909 | } | |
910 | /* Request X11 forwarding if enabled and DISPLAY is set. */ | |
911 | if (options.forward_x11 && getenv("DISPLAY") != NULL) { | |
912 | char *proto, *data; | |
913 | /* Get reasonable local authentication information. */ | |
914 | x11_get_proto(&proto, &data); | |
915 | /* Request forwarding with authentication spoofing. */ | |
916 | debug("Requesting X11 forwarding with authentication spoofing."); | |
917 | x11_request_forwarding_with_spoofing(0, proto, data); | |
918 | ||
919 | /* Read response from the server. */ | |
920 | type = packet_read(); | |
921 | if (type == SSH_SMSG_SUCCESS) { | |
922 | interactive = 1; | |
923 | } else if (type == SSH_SMSG_FAILURE) { | |
924 | logit("Warning: Remote host denied X11 forwarding."); | |
925 | } else { | |
926 | packet_disconnect("Protocol error waiting for X11 forwarding"); | |
927 | } | |
928 | } | |
929 | /* Tell the packet module whether this is an interactive session. */ | |
930 | packet_set_interactive(interactive); | |
931 | ||
932 | /* Request authentication agent forwarding if appropriate. */ | |
933 | check_agent_present(); | |
934 | ||
935 | if (options.forward_agent) { | |
936 | debug("Requesting authentication agent forwarding."); | |
937 | auth_request_forwarding(); | |
938 | ||
939 | /* Read response from the server. */ | |
940 | type = packet_read(); | |
941 | packet_check_eom(); | |
942 | if (type != SSH_SMSG_SUCCESS) | |
943 | logit("Warning: Remote host denied authentication agent forwarding."); | |
944 | } | |
945 | ||
946 | /* Initiate port forwardings. */ | |
947 | ssh_init_forwarding(); | |
948 | ||
949 | /* If requested, let ssh continue in the background. */ | |
950 | if (fork_after_authentication_flag) | |
951 | if (daemon(1, 1) < 0) | |
952 | fatal("daemon() failed: %.200s", strerror(errno)); | |
953 | ||
954 | /* | |
955 | * If a command was specified on the command line, execute the | |
956 | * command now. Otherwise request the server to start a shell. | |
957 | */ | |
958 | if (buffer_len(&command) > 0) { | |
959 | int len = buffer_len(&command); | |
960 | if (len > 900) | |
961 | len = 900; | |
962 | debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command)); | |
963 | packet_start(SSH_CMSG_EXEC_CMD); | |
964 | packet_put_string(buffer_ptr(&command), buffer_len(&command)); | |
965 | packet_send(); | |
966 | packet_write_wait(); | |
967 | } else { | |
968 | debug("Requesting shell."); | |
969 | packet_start(SSH_CMSG_EXEC_SHELL); | |
970 | packet_send(); | |
971 | packet_write_wait(); | |
972 | } | |
973 | ||
974 | /* Enter the interactive session. */ | |
975 | return client_loop(have_tty, tty_flag ? | |
976 | options.escape_char : SSH_ESCAPECHAR_NONE, 0); | |
977 | } | |
978 | ||
979 | static void | |
980 | client_subsystem_reply(int type, u_int32_t seq, void *ctxt) | |
981 | { | |
982 | int id, len; | |
983 | ||
984 | id = packet_get_int(); | |
985 | len = buffer_len(&command); | |
986 | if (len > 900) | |
987 | len = 900; | |
988 | packet_check_eom(); | |
989 | if (type == SSH2_MSG_CHANNEL_FAILURE) | |
990 | fatal("Request for subsystem '%.*s' failed on channel %d", | |
991 | len, (u_char *)buffer_ptr(&command), id); | |
992 | } | |
993 | ||
994 | void | |
995 | client_global_request_reply_fwd(int type, u_int32_t seq, void *ctxt) | |
996 | { | |
997 | int i; | |
998 | ||
999 | i = client_global_request_id++; | |
1000 | if (i >= options.num_remote_forwards) | |
1001 | return; | |
1002 | debug("remote forward %s for: listen %d, connect %s:%d", | |
1003 | type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure", | |
1004 | options.remote_forwards[i].port, | |
1005 | options.remote_forwards[i].host, | |
1006 | options.remote_forwards[i].host_port); | |
1007 | if (type == SSH2_MSG_REQUEST_FAILURE) | |
1008 | logit("Warning: remote port forwarding failed for listen port %d", | |
1009 | options.remote_forwards[i].port); | |
1010 | } | |
1011 | ||
1012 | /* request pty/x11/agent/tcpfwd/shell for channel */ | |
1013 | static void | |
1014 | ssh_session2_setup(int id, void *arg) | |
1015 | { | |
1016 | int len; | |
1017 | int interactive = 0; | |
1018 | struct termios tio; | |
1019 | ||
1020 | debug2("ssh_session2_setup: id %d", id); | |
1021 | ||
1022 | if (tty_flag) { | |
1023 | struct winsize ws; | |
1024 | char *cp; | |
1025 | cp = getenv("TERM"); | |
1026 | if (!cp) | |
1027 | cp = ""; | |
1028 | /* Store window size in the packet. */ | |
1029 | if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) | |
1030 | memset(&ws, 0, sizeof(ws)); | |
1031 | ||
1032 | channel_request_start(id, "pty-req", 0); | |
1033 | packet_put_cstring(cp); | |
1034 | packet_put_int(ws.ws_col); | |
1035 | packet_put_int(ws.ws_row); | |
1036 | packet_put_int(ws.ws_xpixel); | |
1037 | packet_put_int(ws.ws_ypixel); | |
1038 | tio = get_saved_tio(); | |
1039 | tty_make_modes(/*ignored*/ 0, &tio); | |
1040 | packet_send(); | |
1041 | interactive = 1; | |
1042 | /* XXX wait for reply */ | |
1043 | } | |
1044 | if (options.forward_x11 && | |
1045 | getenv("DISPLAY") != NULL) { | |
1046 | char *proto, *data; | |
1047 | /* Get reasonable local authentication information. */ | |
1048 | x11_get_proto(&proto, &data); | |
1049 | /* Request forwarding with authentication spoofing. */ | |
1050 | debug("Requesting X11 forwarding with authentication spoofing."); | |
1051 | x11_request_forwarding_with_spoofing(id, proto, data); | |
1052 | interactive = 1; | |
1053 | /* XXX wait for reply */ | |
1054 | } | |
1055 | ||
1056 | check_agent_present(); | |
1057 | if (options.forward_agent) { | |
1058 | debug("Requesting authentication agent forwarding."); | |
1059 | channel_request_start(id, "auth-agent-req@openssh.com", 0); | |
1060 | packet_send(); | |
1061 | } | |
1062 | ||
1063 | len = buffer_len(&command); | |
1064 | if (len > 0) { | |
1065 | if (len > 900) | |
1066 | len = 900; | |
1067 | if (subsystem_flag) { | |
1068 | debug("Sending subsystem: %.*s", len, (u_char *)buffer_ptr(&command)); | |
1069 | channel_request_start(id, "subsystem", /*want reply*/ 1); | |
1070 | /* register callback for reply */ | |
1071 | /* XXX we assume that client_loop has already been called */ | |
1072 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &client_subsystem_reply); | |
1073 | dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &client_subsystem_reply); | |
1074 | } else { | |
1075 | debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command)); | |
1076 | channel_request_start(id, "exec", 0); | |
1077 | } | |
1078 | packet_put_string(buffer_ptr(&command), buffer_len(&command)); | |
1079 | packet_send(); | |
1080 | } else { | |
1081 | channel_request_start(id, "shell", 0); | |
1082 | packet_send(); | |
1083 | } | |
1084 | ||
1085 | packet_set_interactive(interactive); | |
1086 | } | |
1087 | ||
1088 | /* open new channel for a session */ | |
1089 | static int | |
1090 | ssh_session2_open(void) | |
1091 | { | |
1092 | Channel *c; | |
1093 | int window, packetmax, in, out, err; | |
1094 | ||
1095 | if (stdin_null_flag) { | |
1096 | in = open(_PATH_DEVNULL, O_RDONLY); | |
1097 | } else { | |
1098 | in = dup(STDIN_FILENO); | |
1099 | } | |
1100 | out = dup(STDOUT_FILENO); | |
1101 | err = dup(STDERR_FILENO); | |
1102 | ||
1103 | if (in < 0 || out < 0 || err < 0) | |
1104 | fatal("dup() in/out/err failed"); | |
1105 | ||
1106 | /* enable nonblocking unless tty */ | |
1107 | if (!isatty(in)) | |
1108 | set_nonblock(in); | |
1109 | if (!isatty(out)) | |
1110 | set_nonblock(out); | |
1111 | if (!isatty(err)) | |
1112 | set_nonblock(err); | |
1113 | ||
1114 | window = CHAN_SES_WINDOW_DEFAULT; | |
1115 | packetmax = CHAN_SES_PACKET_DEFAULT; | |
1116 | if (tty_flag) { | |
1117 | window >>= 1; | |
1118 | packetmax >>= 1; | |
1119 | } | |
1120 | c = channel_new( | |
1121 | "session", SSH_CHANNEL_OPENING, in, out, err, | |
1122 | window, packetmax, CHAN_EXTENDED_WRITE, | |
1123 | "client-session", /*nonblock*/0); | |
1124 | ||
1125 | debug3("ssh_session2_open: channel_new: %d", c->self); | |
1126 | ||
1127 | channel_send_open(c->self); | |
1128 | if (!no_shell_flag) | |
1129 | channel_register_confirm(c->self, ssh_session2_setup); | |
1130 | ||
1131 | return c->self; | |
1132 | } | |
1133 | ||
1134 | static int | |
1135 | ssh_session2(void) | |
1136 | { | |
1137 | int id = -1; | |
1138 | ||
1139 | /* XXX should be pre-session */ | |
1140 | ssh_init_forwarding(); | |
1141 | ||
1142 | if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN)) | |
1143 | id = ssh_session2_open(); | |
1144 | ||
1145 | /* If requested, let ssh continue in the background. */ | |
1146 | if (fork_after_authentication_flag) | |
1147 | if (daemon(1, 1) < 0) | |
1148 | fatal("daemon() failed: %.200s", strerror(errno)); | |
1149 | ||
1150 | return client_loop(tty_flag, tty_flag ? | |
1151 | options.escape_char : SSH_ESCAPECHAR_NONE, id); | |
1152 | } | |
1153 | ||
1154 | static void | |
1155 | load_public_identity_files(void) | |
1156 | { | |
1157 | char *filename; | |
1158 | int i = 0; | |
1159 | Key *public; | |
1160 | #ifdef SMARTCARD | |
1161 | Key **keys; | |
1162 | ||
1163 | if (options.smartcard_device != NULL && | |
1164 | options.num_identity_files < SSH_MAX_IDENTITY_FILES && | |
1165 | (keys = sc_get_keys(options.smartcard_device, NULL)) != NULL ) { | |
1166 | int count = 0; | |
1167 | for (i = 0; keys[i] != NULL; i++) { | |
1168 | count++; | |
1169 | memmove(&options.identity_files[1], &options.identity_files[0], | |
1170 | sizeof(char *) * (SSH_MAX_IDENTITY_FILES - 1)); | |
1171 | memmove(&options.identity_keys[1], &options.identity_keys[0], | |
1172 | sizeof(Key *) * (SSH_MAX_IDENTITY_FILES - 1)); | |
1173 | options.num_identity_files++; | |
1174 | options.identity_keys[0] = keys[i]; | |
1175 | options.identity_files[0] = sc_get_key_label(keys[i]); | |
1176 | } | |
1177 | if (options.num_identity_files > SSH_MAX_IDENTITY_FILES) | |
1178 | options.num_identity_files = SSH_MAX_IDENTITY_FILES; | |
1179 | i = count; | |
1180 | xfree(keys); | |
1181 | } | |
1182 | #endif /* SMARTCARD */ | |
1183 | for (; i < options.num_identity_files; i++) { | |
1184 | filename = tilde_expand_filename(options.identity_files[i], | |
1185 | original_real_uid); | |
1186 | public = key_load_public(filename, NULL); | |
1187 | debug("identity file %s type %d", filename, | |
1188 | public ? public->type : -1); | |
1189 | xfree(options.identity_files[i]); | |
1190 | options.identity_files[i] = filename; | |
1191 | options.identity_keys[i] = public; | |
1192 | } | |
1193 | } |