Annotation of src/usr.bin/ssh/ssh.c, Revision 1.209
1.1 deraadt 1: /*
1.32 deraadt 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: *
1.64 deraadt 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.
1.202 markus 16: * Copyright (c) 2000, 2001, 2002, 2003 Markus Friedl. All rights reserved.
1.64 deraadt 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.
1.32 deraadt 40: */
1.1 deraadt 41:
42: #include "includes.h"
1.209 ! markus 43: RCSID("$OpenBSD: ssh.c,v 1.208 2004/03/10 09:45:06 markus Exp $");
1.49 markus 44:
45: #include <openssl/evp.h>
1.72 markus 46: #include <openssl/err.h>
1.1 deraadt 47:
1.84 markus 48: #include "ssh.h"
49: #include "ssh1.h"
50: #include "ssh2.h"
51: #include "compat.h"
52: #include "cipher.h"
1.1 deraadt 53: #include "xmalloc.h"
54: #include "packet.h"
55: #include "buffer.h"
1.123 markus 56: #include "channels.h"
1.49 markus 57: #include "key.h"
1.58 markus 58: #include "authfd.h"
1.49 markus 59: #include "authfile.h"
1.83 markus 60: #include "pathnames.h"
1.81 markus 61: #include "clientloop.h"
1.84 markus 62: #include "log.h"
63: #include "readconf.h"
64: #include "sshconnect.h"
65: #include "tildexpand.h"
1.89 markus 66: #include "dispatch.h"
1.84 markus 67: #include "misc.h"
1.95 markus 68: #include "kex.h"
69: #include "mac.h"
1.115 stevesk 70: #include "sshtty.h"
1.49 markus 71:
1.127 markus 72: #ifdef SMARTCARD
73: #include "scard.h"
1.137 jakob 74: #endif
1.127 markus 75:
1.49 markus 76: extern char *__progname;
1.1 deraadt 77:
1.31 markus 78: /* Flag indicating whether debug mode is on. This can be set on the command line. */
1.1 deraadt 79: int debug_flag = 0;
80:
1.46 markus 81: /* Flag indicating whether a tty should be allocated */
1.1 deraadt 82: int tty_flag = 0;
1.79 markus 83: int no_tty_flag = 0;
84: int force_tty_flag = 0;
1.1 deraadt 85:
1.45 markus 86: /* don't exec a shell */
87: int no_shell_flag = 0;
88:
1.33 markus 89: /*
90: * Flag indicating that nothing should be read from stdin. This can be set
91: * on the command line.
92: */
1.1 deraadt 93: int stdin_null_flag = 0;
94:
1.33 markus 95: /*
96: * Flag indicating that ssh should fork after authentication. This is useful
1.172 deraadt 97: * so that the passphrase can be entered manually, and then ssh goes to the
1.33 markus 98: * background.
99: */
1.1 deraadt 100: int fork_after_authentication_flag = 0;
101:
1.33 markus 102: /*
103: * General data structure for command line options and options configurable
104: * in configuration files. See readconf.h.
105: */
1.1 deraadt 106: Options options;
107:
1.139 markus 108: /* optional user configfile */
109: char *config = NULL;
110:
1.33 markus 111: /*
112: * Name of the host we are connecting to. This is the name given on the
113: * command line, or the HostName specified for the user-supplied name in a
114: * configuration file.
115: */
1.1 deraadt 116: char *host;
117:
1.22 provos 118: /* socket address the host resolves to */
1.37 markus 119: struct sockaddr_storage hostaddr;
1.1 deraadt 120:
1.112 markus 121: /* Private host keys. */
1.173 markus 122: Sensitive sensitive_data;
1.1 deraadt 123:
1.10 dugsong 124: /* Original real UID. */
125: uid_t original_real_uid;
1.177 markus 126: uid_t original_effective_uid;
1.1 deraadt 127:
1.45 markus 128: /* command to be executed */
129: Buffer command;
130:
1.85 djm 131: /* Should we execute a command or invoke a subsystem? */
132: int subsystem_flag = 0;
133:
1.170 markus 134: /* # of replies received for global requests */
135: static int client_global_request_id = 0;
136:
1.186 djm 137: /* pid of proxycommand child process */
138: pid_t proxy_command_pid = 0;
139:
1.1 deraadt 140: /* Prints a help message to the user. This function never returns. */
141:
1.126 itojun 142: static void
1.93 itojun 143: usage(void)
1.1 deraadt 144: {
1.208 markus 145: fprintf(stderr,
146: "usage: ssh [-1246AaCfghkNnqsTtVvXxY] [-b bind_address] [-c cipher_spec]\n"
147: " [-D port] [-e escape_char] [-F configfile] [-i identity_file]\n"
148: " [-L port:host:hostport] [-l login_name] [-m mac_spec] [-o option]\n"
149: " [-p port] [-R port:host:hostport] [user@]hostname [command]\n"
150: );
1.31 markus 151: exit(1);
1.1 deraadt 152: }
153:
1.126 itojun 154: static int ssh_session(void);
155: static int ssh_session2(void);
156: static void load_public_identity_files(void);
1.45 markus 157:
1.32 deraadt 158: /*
159: * Main program for the ssh client.
160: */
1.2 provos 161: int
162: main(int ac, char **av)
1.1 deraadt 163: {
1.178 markus 164: int i, opt, exit_status;
1.35 markus 165: u_short fwd_port, fwd_host_port;
1.141 stevesk 166: char sfwd_port[6], sfwd_host_port[6];
1.205 markus 167: char *p, *cp, *line, buf[256];
1.31 markus 168: struct stat st;
1.98 markus 169: struct passwd *pw;
1.45 markus 170: int dummy;
1.144 stevesk 171: extern int optind, optreset;
172: extern char *optarg;
1.31 markus 173:
1.33 markus 174: /*
175: * Save the original real uid. It will be needed later (uid-swapping
176: * may clobber the real uid).
177: */
1.31 markus 178: original_real_uid = getuid();
179: original_effective_uid = geteuid();
180:
1.184 stevesk 181: /*
182: * Use uid-swapping to give up root privileges for the duration of
183: * option processing. We will re-instantiate the rights when we are
184: * ready to create the privileged port, and will permanently drop
185: * them when the port has been created (actually, when the connection
186: * has been made, as we may need to create the port several times).
187: */
188: PRIV_END;
189:
1.31 markus 190: /* If we are installed setuid root be careful to not drop core. */
191: if (original_real_uid != original_effective_uid) {
192: struct rlimit rlim;
193: rlim.rlim_cur = rlim.rlim_max = 0;
194: if (setrlimit(RLIMIT_CORE, &rlim) < 0)
195: fatal("setrlimit failed: %.100s", strerror(errno));
1.1 deraadt 196: }
1.107 markus 197: /* Get user data. */
198: pw = getpwuid(original_real_uid);
199: if (!pw) {
1.191 itojun 200: logit("You don't exist, go away!");
1.107 markus 201: exit(1);
202: }
203: /* Take a copy of the returned structure. */
204: pw = pwcopy(pw);
1.31 markus 205:
1.33 markus 206: /*
207: * Set our umask to something reasonable, as some files are created
208: * with the default umask. This will make them world-readable but
209: * writable only by the owner, which is ok for all files for which we
210: * don't set the modes explicitly.
211: */
1.31 markus 212: umask(022);
213:
214: /* Initialize option structure to indicate that no values have been set. */
215: initialize_options(&options);
216:
217: /* Parse command-line arguments. */
218: host = NULL;
219:
1.128 fgsch 220: again:
221: while ((opt = getopt(ac, av,
1.202 markus 222: "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:NPR:TVXY")) != -1) {
1.31 markus 223: switch (opt) {
1.91 jakob 224: case '1':
225: options.protocol = SSH_PROTO_1;
226: break;
1.47 markus 227: case '2':
228: options.protocol = SSH_PROTO_2;
229: break;
1.37 markus 230: case '4':
1.196 djm 231: options.address_family = AF_INET;
1.37 markus 232: break;
233: case '6':
1.196 djm 234: options.address_family = AF_INET6;
1.37 markus 235: break;
1.31 markus 236: case 'n':
237: stdin_null_flag = 1;
238: break;
239: case 'f':
240: fork_after_authentication_flag = 1;
241: stdin_null_flag = 1;
242: break;
243: case 'x':
244: options.forward_x11 = 0;
245: break;
246: case 'X':
247: options.forward_x11 = 1;
248: break;
1.202 markus 249: case 'Y':
250: options.forward_x11 = 1;
251: options.forward_x11_trusted = 1;
252: break;
1.31 markus 253: case 'g':
254: options.gateway_ports = 1;
255: break;
1.183 stevesk 256: case 'P': /* deprecated */
1.31 markus 257: options.use_privileged_port = 0;
258: break;
259: case 'a':
260: options.forward_agent = 0;
1.53 markus 261: break;
262: case 'A':
263: options.forward_agent = 1;
1.31 markus 264: break;
265: case 'k':
1.204 dtucker 266: options.gss_deleg_creds = 0;
1.31 markus 267: break;
268: case 'i':
269: if (stat(optarg, &st) < 0) {
1.128 fgsch 270: fprintf(stderr, "Warning: Identity file %s "
271: "does not exist.\n", optarg);
1.31 markus 272: break;
273: }
1.128 fgsch 274: if (options.num_identity_files >=
275: SSH_MAX_IDENTITY_FILES)
276: fatal("Too many identity files specified "
277: "(max %d)", SSH_MAX_IDENTITY_FILES);
278: options.identity_files[options.num_identity_files++] =
279: xstrdup(optarg);
1.31 markus 280: break;
1.127 markus 281: case 'I':
282: #ifdef SMARTCARD
1.133 markus 283: options.smartcard_device = xstrdup(optarg);
1.137 jakob 284: #else
1.127 markus 285: fprintf(stderr, "no support for smartcards.\n");
1.137 jakob 286: #endif
1.127 markus 287: break;
1.31 markus 288: case 't':
1.79 markus 289: if (tty_flag)
290: force_tty_flag = 1;
1.31 markus 291: tty_flag = 1;
292: break;
293: case 'v':
1.197 markus 294: if (debug_flag == 0) {
1.66 markus 295: debug_flag = 1;
296: options.log_level = SYSLOG_LEVEL_DEBUG1;
1.197 markus 297: } else {
298: if (options.log_level < SYSLOG_LEVEL_DEBUG3)
299: options.log_level++;
1.66 markus 300: break;
1.197 markus 301: }
1.66 markus 302: /* fallthrough */
1.31 markus 303: case 'V':
1.209 ! markus 304: fprintf(stderr, "%s, %s\n",
! 305: SSH_VERSION, SSLeay_version(SSLEAY_VERSION));
1.31 markus 306: if (opt == 'V')
307: exit(0);
308: break;
309: case 'q':
310: options.log_level = SYSLOG_LEVEL_QUIET;
311: break;
312: case 'e':
313: if (optarg[0] == '^' && optarg[2] == 0 &&
1.128 fgsch 314: (u_char) optarg[1] >= 64 &&
315: (u_char) optarg[1] < 128)
1.78 markus 316: options.escape_char = (u_char) optarg[1] & 31;
1.31 markus 317: else if (strlen(optarg) == 1)
1.78 markus 318: options.escape_char = (u_char) optarg[0];
1.31 markus 319: else if (strcmp(optarg, "none") == 0)
1.119 stevesk 320: options.escape_char = SSH_ESCAPECHAR_NONE;
1.31 markus 321: else {
1.128 fgsch 322: fprintf(stderr, "Bad escape character '%s'.\n",
323: optarg);
1.31 markus 324: exit(1);
325: }
326: break;
327: case 'c':
1.49 markus 328: if (ciphers_valid(optarg)) {
329: /* SSH2 only */
330: options.ciphers = xstrdup(optarg);
1.51 markus 331: options.cipher = SSH_CIPHER_ILLEGAL;
1.49 markus 332: } else {
333: /* SSH1 only */
1.74 markus 334: options.cipher = cipher_number(optarg);
335: if (options.cipher == -1) {
1.128 fgsch 336: fprintf(stderr,
337: "Unknown cipher type '%s'\n",
338: optarg);
1.49 markus 339: exit(1);
340: }
1.128 fgsch 341: if (options.cipher == SSH_CIPHER_3DES)
1.74 markus 342: options.ciphers = "3des-cbc";
1.128 fgsch 343: else if (options.cipher == SSH_CIPHER_BLOWFISH)
1.74 markus 344: options.ciphers = "blowfish-cbc";
1.128 fgsch 345: else
1.74 markus 346: options.ciphers = (char *)-1;
1.95 markus 347: }
348: break;
349: case 'm':
350: if (mac_valid(optarg))
351: options.macs = xstrdup(optarg);
352: else {
1.128 fgsch 353: fprintf(stderr, "Unknown mac type '%s'\n",
354: optarg);
1.95 markus 355: exit(1);
1.31 markus 356: }
357: break;
358: case 'p':
1.113 stevesk 359: options.port = a2port(optarg);
360: if (options.port == 0) {
1.109 markus 361: fprintf(stderr, "Bad port '%s'\n", optarg);
362: exit(1);
363: }
1.31 markus 364: break;
365: case 'l':
366: options.user = optarg;
367: break;
1.141 stevesk 368:
369: case 'L':
1.31 markus 370: case 'R':
1.141 stevesk 371: if (sscanf(optarg, "%5[0-9]:%255[^:]:%5[0-9]",
372: sfwd_port, buf, sfwd_host_port) != 3 &&
373: sscanf(optarg, "%5[0-9]/%255[^/]/%5[0-9]",
374: sfwd_port, buf, sfwd_host_port) != 3) {
1.128 fgsch 375: fprintf(stderr,
1.141 stevesk 376: "Bad forwarding specification '%s'\n",
1.128 fgsch 377: optarg);
1.31 markus 378: usage();
379: /* NOTREACHED */
380: }
1.141 stevesk 381: if ((fwd_port = a2port(sfwd_port)) == 0 ||
1.165 markus 382: (fwd_host_port = a2port(sfwd_host_port)) == 0) {
1.128 fgsch 383: fprintf(stderr,
1.141 stevesk 384: "Bad forwarding port(s) '%s'\n", optarg);
385: exit(1);
1.31 markus 386: }
1.141 stevesk 387: if (opt == 'L')
388: add_local_forward(&options, fwd_port, buf,
389: fwd_host_port);
390: else if (opt == 'R')
391: add_remote_forward(&options, fwd_port, buf,
1.151 deraadt 392: fwd_host_port);
1.31 markus 393: break;
1.108 markus 394:
395: case 'D':
1.113 stevesk 396: fwd_port = a2port(optarg);
397: if (fwd_port == 0) {
1.128 fgsch 398: fprintf(stderr, "Bad dynamic port '%s'\n",
399: optarg);
1.109 markus 400: exit(1);
401: }
1.200 markus 402: add_local_forward(&options, fwd_port, "socks", 0);
1.108 markus 403: break;
404:
1.31 markus 405: case 'C':
406: options.compression = 1;
407: break;
1.45 markus 408: case 'N':
409: no_shell_flag = 1;
410: no_tty_flag = 1;
411: break;
412: case 'T':
413: no_tty_flag = 1;
414: break;
1.31 markus 415: case 'o':
416: dummy = 1;
1.205 markus 417: line = xstrdup(optarg);
1.128 fgsch 418: if (process_config_line(&options, host ? host : "",
1.205 markus 419: line, "command-line", 0, &dummy) != 0)
1.31 markus 420: exit(1);
1.205 markus 421: xfree(line);
1.31 markus 422: break;
1.85 djm 423: case 's':
424: subsystem_flag = 1;
1.117 markus 425: break;
426: case 'b':
427: options.bind_address = optarg;
1.85 djm 428: break;
1.139 markus 429: case 'F':
430: config = optarg;
431: break;
1.31 markus 432: default:
433: usage();
1.1 deraadt 434: }
1.31 markus 435: }
436:
1.128 fgsch 437: ac -= optind;
438: av += optind;
439:
440: if (ac > 0 && !host && **av != '-') {
1.188 markus 441: if (strrchr(*av, '@')) {
1.128 fgsch 442: p = xstrdup(*av);
1.188 markus 443: cp = strrchr(p, '@');
1.128 fgsch 444: if (cp == NULL || cp == p)
445: usage();
446: options.user = p;
447: *cp = '\0';
448: host = ++cp;
449: } else
450: host = *av;
1.189 millert 451: if (ac > 1) {
452: optind = optreset = 1;
1.128 fgsch 453: goto again;
454: }
1.189 millert 455: ac--, av++;
1.128 fgsch 456: }
457:
1.31 markus 458: /* Check that we got a host name. */
459: if (!host)
460: usage();
461:
1.54 markus 462: SSLeay_add_all_algorithms();
1.72 markus 463: ERR_load_crypto_strings();
1.31 markus 464:
465: /* Initialize the command to execute on remote host. */
466: buffer_init(&command);
1.1 deraadt 467:
1.33 markus 468: /*
469: * Save the command to execute on the remote host in a buffer. There
470: * is no limit on the length of the command, except by the maximum
471: * packet size. Also sets the tty flag if there is no command.
472: */
1.128 fgsch 473: if (!ac) {
1.31 markus 474: /* No command specified - execute shell on a tty. */
475: tty_flag = 1;
1.85 djm 476: if (subsystem_flag) {
1.128 fgsch 477: fprintf(stderr,
478: "You must specify a subsystem to invoke.\n");
1.85 djm 479: usage();
480: }
1.31 markus 481: } else {
1.128 fgsch 482: /* A command has been specified. Store it into the buffer. */
483: for (i = 0; i < ac; i++) {
484: if (i)
1.31 markus 485: buffer_append(&command, " ", 1);
486: buffer_append(&command, av[i], strlen(av[i]));
487: }
488: }
489:
490: /* Cannot fork to background if no command. */
1.63 markus 491: if (fork_after_authentication_flag && buffer_len(&command) == 0 && !no_shell_flag)
1.31 markus 492: fatal("Cannot fork into background without a command to execute.");
493:
494: /* Allocate a tty by default if no command specified. */
495: if (buffer_len(&command) == 0)
496: tty_flag = 1;
497:
1.180 deraadt 498: /* Force no tty */
1.75 markus 499: if (no_tty_flag)
500: tty_flag = 0;
1.31 markus 501: /* Do not allocate a tty if stdin is not a tty. */
1.79 markus 502: if (!isatty(fileno(stdin)) && !force_tty_flag) {
1.31 markus 503: if (tty_flag)
1.191 itojun 504: logit("Pseudo-terminal will not be allocated because stdin is not a terminal.");
1.31 markus 505: tty_flag = 0;
506: }
1.45 markus 507:
1.101 markus 508: /*
509: * Initialize "log" output. Since we are the client all output
510: * actually goes to stderr.
511: */
1.111 markus 512: log_init(av[0], options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level,
513: SYSLOG_FACILITY_USER, 1);
1.31 markus 514:
1.139 markus 515: /*
516: * Read per-user configuration file. Ignore the system wide config
517: * file if the user specifies a config file on the command line.
518: */
519: if (config != NULL) {
1.142 stevesk 520: if (!read_config_file(config, host, &options))
521: fatal("Can't open user config file %.100s: "
522: "%.100s", config, strerror(errno));
1.139 markus 523: } else {
524: snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir,
525: _PATH_SSH_USER_CONFFILE);
1.145 markus 526: (void)read_config_file(buf, host, &options);
1.139 markus 527:
1.145 markus 528: /* Read systemwide configuration file after use config. */
1.142 stevesk 529: (void)read_config_file(_PATH_HOST_CONFIG_FILE, host, &options);
1.139 markus 530: }
1.31 markus 531:
532: /* Fill configuration defaults. */
533: fill_default_options(&options);
534:
1.196 djm 535: channel_set_af(options.address_family);
536:
1.31 markus 537: /* reinit */
1.101 markus 538: log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1);
1.31 markus 539:
540: if (options.user == NULL)
541: options.user = xstrdup(pw->pw_name);
542:
543: if (options.hostname != NULL)
544: host = options.hostname;
1.195 markus 545:
546: /* force lowercase for hostkey matching */
547: if (options.host_key_alias != NULL) {
548: for (p = options.host_key_alias; *p; p++)
549: if (isupper(*p))
550: *p = tolower(*p);
551: }
1.190 markus 552:
553: if (options.proxy_command != NULL &&
554: strcmp(options.proxy_command, "none") == 0)
555: options.proxy_command = NULL;
1.31 markus 556:
1.77 markus 557: /* Open a connection to the remote host. */
1.203 djm 558: if (ssh_connect(host, &hostaddr, options.port,
1.196 djm 559: options.address_family, options.connection_attempts,
1.177 markus 560: original_effective_uid == 0 && options.use_privileged_port,
1.179 markus 561: options.proxy_command) != 0)
1.178 markus 562: exit(1);
1.31 markus 563:
1.33 markus 564: /*
565: * If we successfully made the connection, load the host private key
566: * in case we will need it later for combined rsa-rhosts
567: * authentication. This must be done before releasing extra
568: * privileges, because the file is only readable by root.
1.174 markus 569: * If we cannot access the private keys, load the public keys
570: * instead and try to execute the ssh-keysign helper instead.
1.33 markus 571: */
1.112 markus 572: sensitive_data.nkeys = 0;
573: sensitive_data.keys = NULL;
1.173 markus 574: sensitive_data.external_keysign = 0;
1.178 markus 575: if (options.rhosts_rsa_authentication ||
576: options.hostbased_authentication) {
1.112 markus 577: sensitive_data.nkeys = 3;
1.180 deraadt 578: sensitive_data.keys = xmalloc(sensitive_data.nkeys *
579: sizeof(Key));
1.177 markus 580:
581: PRIV_START;
1.112 markus 582: sensitive_data.keys[0] = key_load_private_type(KEY_RSA1,
1.105 markus 583: _PATH_HOST_KEY_FILE, "", NULL);
1.112 markus 584: sensitive_data.keys[1] = key_load_private_type(KEY_DSA,
585: _PATH_HOST_DSA_KEY_FILE, "", NULL);
586: sensitive_data.keys[2] = key_load_private_type(KEY_RSA,
587: _PATH_HOST_RSA_KEY_FILE, "", NULL);
1.177 markus 588: PRIV_END;
1.173 markus 589:
1.181 markus 590: if (options.hostbased_authentication == 1 &&
591: sensitive_data.keys[0] == NULL &&
1.173 markus 592: sensitive_data.keys[1] == NULL &&
593: sensitive_data.keys[2] == NULL) {
594: sensitive_data.keys[1] = key_load_public(
595: _PATH_HOST_DSA_KEY_FILE, NULL);
596: sensitive_data.keys[2] = key_load_public(
597: _PATH_HOST_RSA_KEY_FILE, NULL);
598: sensitive_data.external_keysign = 1;
599: }
1.31 markus 600: }
1.33 markus 601: /*
602: * Get rid of any extra privileges that we may have. We will no
603: * longer need them. Also, extra privileges could make it very hard
604: * to read identity files and other non-world-readable files from the
605: * user's home directory if it happens to be on a NFS volume where
606: * root is mapped to nobody.
607: */
1.177 markus 608: seteuid(original_real_uid);
609: setuid(original_real_uid);
1.31 markus 610:
1.33 markus 611: /*
612: * Now that we are back to our own permissions, create ~/.ssh
613: * directory if it doesn\'t already exist.
614: */
1.138 jakob 615: snprintf(buf, sizeof buf, "%.100s%s%.100s", pw->pw_dir, strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR);
1.31 markus 616: if (stat(buf, &st) < 0)
1.57 djm 617: if (mkdir(buf, 0700) < 0)
1.31 markus 618: error("Could not create directory '%.200s'.", buf);
619:
1.104 markus 620: /* load options.identity_files */
621: load_public_identity_files();
622:
623: /* Expand ~ in known host file names. */
624: /* XXX mem-leaks: */
1.72 markus 625: options.system_hostfile =
626: tilde_expand_filename(options.system_hostfile, original_real_uid);
627: options.user_hostfile =
628: tilde_expand_filename(options.user_hostfile, original_real_uid);
629: options.system_hostfile2 =
630: tilde_expand_filename(options.system_hostfile2, original_real_uid);
631: options.user_hostfile2 =
632: tilde_expand_filename(options.user_hostfile2, original_real_uid);
1.149 markus 633:
634: signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */
1.31 markus 635:
636: /* Log into the remote system. This never returns if the login fails. */
1.173 markus 637: ssh_login(&sensitive_data, host, (struct sockaddr *)&hostaddr, pw);
1.31 markus 638:
1.112 markus 639: /* We no longer need the private host keys. Clear them now. */
640: if (sensitive_data.nkeys != 0) {
641: for (i = 0; i < sensitive_data.nkeys; i++) {
642: if (sensitive_data.keys[i] != NULL) {
643: /* Destroys contents safely */
644: debug3("clear hostkey %d", i);
645: key_free(sensitive_data.keys[i]);
646: sensitive_data.keys[i] = NULL;
647: }
648: }
649: xfree(sensitive_data.keys);
1.134 markus 650: }
651: for (i = 0; i < options.num_identity_files; i++) {
652: if (options.identity_files[i]) {
653: xfree(options.identity_files[i]);
654: options.identity_files[i] = NULL;
655: }
656: if (options.identity_keys[i]) {
657: key_free(options.identity_keys[i]);
658: options.identity_keys[i] = NULL;
659: }
1.112 markus 660: }
1.31 markus 661:
1.45 markus 662: exit_status = compat20 ? ssh_session2() : ssh_session();
663: packet_close();
1.186 djm 664:
665: /*
1.203 djm 666: * Send SIGHUP to proxy command if used. We don't wait() in
1.186 djm 667: * case it hangs and instead rely on init to reap the child
668: */
669: if (proxy_command_pid > 1)
670: kill(proxy_command_pid, SIGHUP);
671:
1.45 markus 672: return exit_status;
673: }
674:
1.202 markus 675: #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1"
676:
1.126 itojun 677: static void
1.150 stevesk 678: x11_get_proto(char **_proto, char **_data)
1.50 markus 679: {
1.202 markus 680: char cmd[1024];
1.50 markus 681: char line[512];
1.202 markus 682: char xdisplay[512];
1.150 stevesk 683: static char proto[512], data[512];
1.50 markus 684: FILE *f;
1.202 markus 685: int got_data = 0, generated = 0, do_unlink = 0, i;
686: char *display, *xauthdir, *xauthfile;
1.182 stevesk 687: struct stat st;
1.50 markus 688:
1.202 markus 689: xauthdir = xauthfile = NULL;
1.150 stevesk 690: *_proto = proto;
691: *_data = data;
692: proto[0] = data[0] = '\0';
1.202 markus 693:
1.182 stevesk 694: if (!options.xauth_location ||
695: (stat(options.xauth_location, &st) == -1)) {
696: debug("No xauth program.");
697: } else {
698: if ((display = getenv("DISPLAY")) == NULL) {
699: debug("x11_get_proto: DISPLAY not set");
700: return;
701: }
1.202 markus 702: /*
703: * Handle FamilyLocal case where $DISPLAY does
704: * not match an authorization entry. For this we
705: * just try "xauth list unix:displaynum.screennum".
706: * XXX: "localhost" match to determine FamilyLocal
707: * is not perfect.
708: */
709: if (strncmp(display, "localhost:", 10) == 0) {
710: snprintf(xdisplay, sizeof(xdisplay), "unix:%s",
711: display + 10);
712: display = xdisplay;
713: }
714: if (options.forward_x11_trusted == 0) {
715: xauthdir = xmalloc(MAXPATHLEN);
716: xauthfile = xmalloc(MAXPATHLEN);
717: strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN);
718: if (mkdtemp(xauthdir) != NULL) {
719: do_unlink = 1;
720: snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile",
721: xauthdir);
722: snprintf(cmd, sizeof(cmd),
723: "%s -f %s generate %s " SSH_X11_PROTO
1.207 markus 724: " untrusted timeout 1200 2>" _PATH_DEVNULL,
1.202 markus 725: options.xauth_location, xauthfile, display);
726: debug2("x11_get_proto: %s", cmd);
727: if (system(cmd) == 0)
728: generated = 1;
729: }
730: }
731: snprintf(cmd, sizeof(cmd),
732: "%s %s%s list %s . 2>" _PATH_DEVNULL,
733: options.xauth_location,
734: generated ? "-f " : "" ,
735: generated ? xauthfile : "",
736: display);
737: debug2("x11_get_proto: %s", cmd);
738: f = popen(cmd, "r");
1.55 markus 739: if (f && fgets(line, sizeof(line), f) &&
1.150 stevesk 740: sscanf(line, "%*s %511s %511s", proto, data) == 2)
1.55 markus 741: got_data = 1;
742: if (f)
743: pclose(f);
744: }
1.202 markus 745:
746: if (do_unlink) {
747: unlink(xauthfile);
748: rmdir(xauthdir);
749: }
750: if (xauthdir)
751: xfree(xauthdir);
752: if (xauthfile)
753: xfree(xauthfile);
754:
1.50 markus 755: /*
756: * If we didn't get authentication data, just make up some
757: * data. The forwarding code will check the validity of the
758: * response anyway, and substitute this data. The X11
759: * server, however, will ignore this fake data and use
760: * whatever authentication mechanisms it was using otherwise
761: * for the local connection.
762: */
763: if (!got_data) {
764: u_int32_t rand = 0;
765:
1.202 markus 766: logit("Warning: No xauth data; "
767: "using fake authentication data for X11 forwarding.");
768: strlcpy(proto, SSH_X11_PROTO, sizeof proto);
1.50 markus 769: for (i = 0; i < 16; i++) {
770: if (i % 4 == 0)
771: rand = arc4random();
1.202 markus 772: snprintf(data + 2 * i, sizeof data - 2 * i, "%02x",
773: rand & 0xff);
1.50 markus 774: rand >>= 8;
775: }
776: }
777: }
778:
1.126 itojun 779: static void
1.70 markus 780: ssh_init_forwarding(void)
781: {
1.86 markus 782: int success = 0;
1.70 markus 783: int i;
1.86 markus 784:
1.70 markus 785: /* Initiate local TCP/IP port forwardings. */
786: for (i = 0; i < options.num_local_forwards; i++) {
787: debug("Connections to local port %d forwarded to remote address %.200s:%d",
788: options.local_forwards[i].port,
789: options.local_forwards[i].host,
790: options.local_forwards[i].host_port);
1.158 markus 791: success += channel_setup_local_fwd_listener(
1.70 markus 792: options.local_forwards[i].port,
793: options.local_forwards[i].host,
794: options.local_forwards[i].host_port,
795: options.gateway_ports);
796: }
1.86 markus 797: if (i > 0 && success == 0)
798: error("Could not request local forwarding.");
1.70 markus 799:
800: /* Initiate remote TCP/IP port forwardings. */
801: for (i = 0; i < options.num_remote_forwards; i++) {
802: debug("Connections to remote port %d forwarded to local address %.200s:%d",
803: options.remote_forwards[i].port,
804: options.remote_forwards[i].host,
805: options.remote_forwards[i].host_port);
806: channel_request_remote_forwarding(
807: options.remote_forwards[i].port,
808: options.remote_forwards[i].host,
809: options.remote_forwards[i].host_port);
810: }
811: }
812:
1.126 itojun 813: static void
1.70 markus 814: check_agent_present(void)
815: {
816: if (options.forward_agent) {
817: /* Clear agent forwarding if we don\'t have an agent. */
1.185 stevesk 818: if (!ssh_agent_present())
1.70 markus 819: options.forward_agent = 0;
820: }
821: }
822:
1.126 itojun 823: static int
1.45 markus 824: ssh_session(void)
825: {
826: int type;
827: int interactive = 0;
828: int have_tty = 0;
829: struct winsize ws;
830: char *cp;
831:
1.31 markus 832: /* Enable compression if requested. */
833: if (options.compression) {
834: debug("Requesting compression at level %d.", options.compression_level);
835:
836: if (options.compression_level < 1 || options.compression_level > 9)
837: fatal("Compression level must be from 1 (fast) to 9 (slow, best).");
838:
839: /* Send the request. */
840: packet_start(SSH_CMSG_REQUEST_COMPRESSION);
841: packet_put_int(options.compression_level);
842: packet_send();
843: packet_write_wait();
1.156 markus 844: type = packet_read();
1.31 markus 845: if (type == SSH_SMSG_SUCCESS)
846: packet_start_compression(options.compression_level);
847: else if (type == SSH_SMSG_FAILURE)
1.191 itojun 848: logit("Warning: Remote host refused compression.");
1.31 markus 849: else
850: packet_disconnect("Protocol error waiting for compression response.");
851: }
852: /* Allocate a pseudo tty if appropriate. */
853: if (tty_flag) {
854: debug("Requesting pty.");
855:
856: /* Start the packet. */
857: packet_start(SSH_CMSG_REQUEST_PTY);
858:
859: /* Store TERM in the packet. There is no limit on the
860: length of the string. */
861: cp = getenv("TERM");
862: if (!cp)
863: cp = "";
1.124 markus 864: packet_put_cstring(cp);
1.31 markus 865:
866: /* Store window size in the packet. */
867: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
868: memset(&ws, 0, sizeof(ws));
869: packet_put_int(ws.ws_row);
870: packet_put_int(ws.ws_col);
871: packet_put_int(ws.ws_xpixel);
872: packet_put_int(ws.ws_ypixel);
873:
874: /* Store tty modes in the packet. */
1.115 stevesk 875: tty_make_modes(fileno(stdin), NULL);
1.31 markus 876:
877: /* Send the packet, and wait for it to leave. */
878: packet_send();
879: packet_write_wait();
880:
881: /* Read response from the server. */
1.156 markus 882: type = packet_read();
1.43 markus 883: if (type == SSH_SMSG_SUCCESS) {
1.31 markus 884: interactive = 1;
1.45 markus 885: have_tty = 1;
1.43 markus 886: } else if (type == SSH_SMSG_FAILURE)
1.191 itojun 887: logit("Warning: Remote host failed or refused to allocate a pseudo tty.");
1.31 markus 888: else
889: packet_disconnect("Protocol error waiting for pty request response.");
890: }
891: /* Request X11 forwarding if enabled and DISPLAY is set. */
892: if (options.forward_x11 && getenv("DISPLAY") != NULL) {
1.150 stevesk 893: char *proto, *data;
1.50 markus 894: /* Get reasonable local authentication information. */
1.150 stevesk 895: x11_get_proto(&proto, &data);
1.50 markus 896: /* Request forwarding with authentication spoofing. */
1.31 markus 897: debug("Requesting X11 forwarding with authentication spoofing.");
1.50 markus 898: x11_request_forwarding_with_spoofing(0, proto, data);
1.31 markus 899:
900: /* Read response from the server. */
1.156 markus 901: type = packet_read();
1.31 markus 902: if (type == SSH_SMSG_SUCCESS) {
903: interactive = 1;
1.50 markus 904: } else if (type == SSH_SMSG_FAILURE) {
1.191 itojun 905: logit("Warning: Remote host denied X11 forwarding.");
1.50 markus 906: } else {
1.31 markus 907: packet_disconnect("Protocol error waiting for X11 forwarding");
1.50 markus 908: }
1.31 markus 909: }
910: /* Tell the packet module whether this is an interactive session. */
1.80 markus 911: packet_set_interactive(interactive);
1.31 markus 912:
913: /* Request authentication agent forwarding if appropriate. */
1.70 markus 914: check_agent_present();
915:
1.31 markus 916: if (options.forward_agent) {
917: debug("Requesting authentication agent forwarding.");
918: auth_request_forwarding();
919:
920: /* Read response from the server. */
1.156 markus 921: type = packet_read();
1.155 markus 922: packet_check_eom();
1.31 markus 923: if (type != SSH_SMSG_SUCCESS)
1.191 itojun 924: logit("Warning: Remote host denied authentication agent forwarding.");
1.31 markus 925: }
926:
1.70 markus 927: /* Initiate port forwardings. */
928: ssh_init_forwarding();
1.34 markus 929:
930: /* If requested, let ssh continue in the background. */
1.48 markus 931: if (fork_after_authentication_flag)
1.34 markus 932: if (daemon(1, 1) < 0)
933: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 934:
1.33 markus 935: /*
936: * If a command was specified on the command line, execute the
937: * command now. Otherwise request the server to start a shell.
938: */
1.31 markus 939: if (buffer_len(&command) > 0) {
940: int len = buffer_len(&command);
941: if (len > 900)
942: len = 900;
1.152 stevesk 943: debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
1.31 markus 944: packet_start(SSH_CMSG_EXEC_CMD);
945: packet_put_string(buffer_ptr(&command), buffer_len(&command));
946: packet_send();
947: packet_write_wait();
948: } else {
949: debug("Requesting shell.");
950: packet_start(SSH_CMSG_EXEC_SHELL);
951: packet_send();
952: packet_write_wait();
953: }
954:
955: /* Enter the interactive session. */
1.119 stevesk 956: return client_loop(have_tty, tty_flag ?
957: options.escape_char : SSH_ESCAPECHAR_NONE, 0);
1.45 markus 958: }
959:
1.126 itojun 960: static void
1.157 markus 961: client_subsystem_reply(int type, u_int32_t seq, void *ctxt)
1.89 markus 962: {
963: int id, len;
964:
965: id = packet_get_int();
966: len = buffer_len(&command);
1.100 markus 967: if (len > 900)
968: len = 900;
1.155 markus 969: packet_check_eom();
1.89 markus 970: if (type == SSH2_MSG_CHANNEL_FAILURE)
971: fatal("Request for subsystem '%.*s' failed on channel %d",
1.152 stevesk 972: len, (u_char *)buffer_ptr(&command), id);
1.170 markus 973: }
974:
975: void
1.206 markus 976: client_global_request_reply_fwd(int type, u_int32_t seq, void *ctxt)
1.170 markus 977: {
978: int i;
979:
980: i = client_global_request_id++;
1.206 markus 981: if (i >= options.num_remote_forwards)
1.170 markus 982: return;
983: debug("remote forward %s for: listen %d, connect %s:%d",
984: type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure",
985: options.remote_forwards[i].port,
986: options.remote_forwards[i].host,
987: options.remote_forwards[i].host_port);
988: if (type == SSH2_MSG_REQUEST_FAILURE)
1.191 itojun 989: logit("Warning: remote port forwarding failed for listen port %d",
1.170 markus 990: options.remote_forwards[i].port);
1.89 markus 991: }
992:
1.143 markus 993: /* request pty/x11/agent/tcpfwd/shell for channel */
1.126 itojun 994: static void
1.143 markus 995: ssh_session2_setup(int id, void *arg)
1.45 markus 996: {
997: int len;
1.80 markus 998: int interactive = 0;
1.115 stevesk 999: struct termios tio;
1.80 markus 1000:
1.187 markus 1001: debug2("ssh_session2_setup: id %d", id);
1.31 markus 1002:
1.45 markus 1003: if (tty_flag) {
1004: struct winsize ws;
1005: char *cp;
1006: cp = getenv("TERM");
1007: if (!cp)
1008: cp = "";
1009: /* Store window size in the packet. */
1010: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
1011: memset(&ws, 0, sizeof(ws));
1012:
1013: channel_request_start(id, "pty-req", 0);
1014: packet_put_cstring(cp);
1015: packet_put_int(ws.ws_col);
1016: packet_put_int(ws.ws_row);
1017: packet_put_int(ws.ws_xpixel);
1018: packet_put_int(ws.ws_ypixel);
1.115 stevesk 1019: tio = get_saved_tio();
1020: tty_make_modes(/*ignored*/ 0, &tio);
1.45 markus 1021: packet_send();
1.80 markus 1022: interactive = 1;
1.45 markus 1023: /* XXX wait for reply */
1024: }
1.50 markus 1025: if (options.forward_x11 &&
1026: getenv("DISPLAY") != NULL) {
1.150 stevesk 1027: char *proto, *data;
1.50 markus 1028: /* Get reasonable local authentication information. */
1.150 stevesk 1029: x11_get_proto(&proto, &data);
1.50 markus 1030: /* Request forwarding with authentication spoofing. */
1031: debug("Requesting X11 forwarding with authentication spoofing.");
1032: x11_request_forwarding_with_spoofing(id, proto, data);
1.80 markus 1033: interactive = 1;
1.50 markus 1034: /* XXX wait for reply */
1035: }
1036:
1.70 markus 1037: check_agent_present();
1038: if (options.forward_agent) {
1039: debug("Requesting authentication agent forwarding.");
1040: channel_request_start(id, "auth-agent-req@openssh.com", 0);
1041: packet_send();
1042: }
1043:
1.45 markus 1044: len = buffer_len(&command);
1045: if (len > 0) {
1046: if (len > 900)
1047: len = 900;
1.85 djm 1048: if (subsystem_flag) {
1.152 stevesk 1049: debug("Sending subsystem: %.*s", len, (u_char *)buffer_ptr(&command));
1.89 markus 1050: channel_request_start(id, "subsystem", /*want reply*/ 1);
1051: /* register callback for reply */
1.172 deraadt 1052: /* XXX we assume that client_loop has already been called */
1.89 markus 1053: dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &client_subsystem_reply);
1054: dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &client_subsystem_reply);
1.85 djm 1055: } else {
1.152 stevesk 1056: debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
1.85 djm 1057: channel_request_start(id, "exec", 0);
1058: }
1.100 markus 1059: packet_put_string(buffer_ptr(&command), buffer_len(&command));
1.45 markus 1060: packet_send();
1061: } else {
1.161 markus 1062: channel_request_start(id, "shell", 0);
1063: packet_send();
1.45 markus 1064: }
1.90 markus 1065:
1.80 markus 1066: packet_set_interactive(interactive);
1.45 markus 1067: }
1068:
1.143 markus 1069: /* open new channel for a session */
1.126 itojun 1070: static int
1.143 markus 1071: ssh_session2_open(void)
1.45 markus 1072: {
1.118 markus 1073: Channel *c;
1074: int window, packetmax, in, out, err;
1.60 markus 1075:
1.62 markus 1076: if (stdin_null_flag) {
1.93 itojun 1077: in = open(_PATH_DEVNULL, O_RDONLY);
1.62 markus 1078: } else {
1079: in = dup(STDIN_FILENO);
1080: }
1.60 markus 1081: out = dup(STDOUT_FILENO);
1082: err = dup(STDERR_FILENO);
1.45 markus 1083:
1084: if (in < 0 || out < 0 || err < 0)
1.62 markus 1085: fatal("dup() in/out/err failed");
1.45 markus 1086:
1.69 markus 1087: /* enable nonblocking unless tty */
1088: if (!isatty(in))
1089: set_nonblock(in);
1090: if (!isatty(out))
1091: set_nonblock(out);
1092: if (!isatty(err))
1093: set_nonblock(err);
1094:
1.65 markus 1095: window = CHAN_SES_WINDOW_DEFAULT;
1096: packetmax = CHAN_SES_PACKET_DEFAULT;
1.164 markus 1097: if (tty_flag) {
1098: window >>= 1;
1099: packetmax >>= 1;
1.45 markus 1100: }
1.118 markus 1101: c = channel_new(
1.45 markus 1102: "session", SSH_CHANNEL_OPENING, in, out, err,
1.65 markus 1103: window, packetmax, CHAN_EXTENDED_WRITE,
1.192 markus 1104: "client-session", /*nonblock*/0);
1.45 markus 1105:
1.143 markus 1106: debug3("ssh_session2_open: channel_new: %d", c->self);
1.106 markus 1107:
1.122 markus 1108: channel_send_open(c->self);
1.143 markus 1109: if (!no_shell_flag)
1.160 markus 1110: channel_register_confirm(c->self, ssh_session2_setup);
1.106 markus 1111:
1.118 markus 1112: return c->self;
1.106 markus 1113: }
1114:
1.126 itojun 1115: static int
1.106 markus 1116: ssh_session2(void)
1117: {
1.143 markus 1118: int id = -1;
1.106 markus 1119:
1120: /* XXX should be pre-session */
1121: ssh_init_forwarding();
1122:
1.143 markus 1123: if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN))
1124: id = ssh_session2_open();
1.106 markus 1125:
1126: /* If requested, let ssh continue in the background. */
1127: if (fork_after_authentication_flag)
1128: if (daemon(1, 1) < 0)
1129: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 1130:
1.119 stevesk 1131: return client_loop(tty_flag, tty_flag ?
1132: options.escape_char : SSH_ESCAPECHAR_NONE, id);
1.72 markus 1133: }
1134:
1.126 itojun 1135: static void
1.104 markus 1136: load_public_identity_files(void)
1137: {
1138: char *filename;
1.167 markus 1139: int i = 0;
1.104 markus 1140: Key *public;
1.167 markus 1141: #ifdef SMARTCARD
1142: Key **keys;
1.104 markus 1143:
1.133 markus 1144: if (options.smartcard_device != NULL &&
1.167 markus 1145: options.num_identity_files < SSH_MAX_IDENTITY_FILES &&
1146: (keys = sc_get_keys(options.smartcard_device, NULL)) != NULL ) {
1147: int count = 0;
1148: for (i = 0; keys[i] != NULL; i++) {
1149: count++;
1150: memmove(&options.identity_files[1], &options.identity_files[0],
1151: sizeof(char *) * (SSH_MAX_IDENTITY_FILES - 1));
1152: memmove(&options.identity_keys[1], &options.identity_keys[0],
1153: sizeof(Key *) * (SSH_MAX_IDENTITY_FILES - 1));
1154: options.num_identity_files++;
1155: options.identity_keys[0] = keys[i];
1.194 markus 1156: options.identity_files[0] = sc_get_key_label(keys[i]);
1.167 markus 1157: }
1.168 markus 1158: if (options.num_identity_files > SSH_MAX_IDENTITY_FILES)
1159: options.num_identity_files = SSH_MAX_IDENTITY_FILES;
1.167 markus 1160: i = count;
1161: xfree(keys);
1.127 markus 1162: }
1.136 jakob 1163: #endif /* SMARTCARD */
1.131 millert 1164: for (; i < options.num_identity_files; i++) {
1165: filename = tilde_expand_filename(options.identity_files[i],
1166: original_real_uid);
1167: public = key_load_public(filename, NULL);
1168: debug("identity file %s type %d", filename,
1169: public ? public->type : -1);
1170: xfree(options.identity_files[i]);
1171: options.identity_files[i] = filename;
1172: options.identity_keys[i] = public;
1173: }
1.1 deraadt 1174: }
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