Annotation of src/usr.bin/ssh/ssh.c, Revision 1.208
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"
1.208 ! markus 43: RCSID("$OpenBSD: ssh.c,v 1.207 2004/03/09 22:11:05 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':
1.96 deraadt 304: fprintf(stderr,
1.193 djm 305: "%s, SSH protocols %d.%d/%d.%d, %s\n",
1.46 markus 306: SSH_VERSION,
307: PROTOCOL_MAJOR_1, PROTOCOL_MINOR_1,
1.96 deraadt 308: PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2,
1.193 djm 309: SSLeay_version(SSLEAY_VERSION));
1.31 markus 310: if (opt == 'V')
311: exit(0);
312: break;
313: case 'q':
314: options.log_level = SYSLOG_LEVEL_QUIET;
315: break;
316: case 'e':
317: if (optarg[0] == '^' && optarg[2] == 0 &&
1.128 fgsch 318: (u_char) optarg[1] >= 64 &&
319: (u_char) optarg[1] < 128)
1.78 markus 320: options.escape_char = (u_char) optarg[1] & 31;
1.31 markus 321: else if (strlen(optarg) == 1)
1.78 markus 322: options.escape_char = (u_char) optarg[0];
1.31 markus 323: else if (strcmp(optarg, "none") == 0)
1.119 stevesk 324: options.escape_char = SSH_ESCAPECHAR_NONE;
1.31 markus 325: else {
1.128 fgsch 326: fprintf(stderr, "Bad escape character '%s'.\n",
327: optarg);
1.31 markus 328: exit(1);
329: }
330: break;
331: case 'c':
1.49 markus 332: if (ciphers_valid(optarg)) {
333: /* SSH2 only */
334: options.ciphers = xstrdup(optarg);
1.51 markus 335: options.cipher = SSH_CIPHER_ILLEGAL;
1.49 markus 336: } else {
337: /* SSH1 only */
1.74 markus 338: options.cipher = cipher_number(optarg);
339: if (options.cipher == -1) {
1.128 fgsch 340: fprintf(stderr,
341: "Unknown cipher type '%s'\n",
342: optarg);
1.49 markus 343: exit(1);
344: }
1.128 fgsch 345: if (options.cipher == SSH_CIPHER_3DES)
1.74 markus 346: options.ciphers = "3des-cbc";
1.128 fgsch 347: else if (options.cipher == SSH_CIPHER_BLOWFISH)
1.74 markus 348: options.ciphers = "blowfish-cbc";
1.128 fgsch 349: else
1.74 markus 350: options.ciphers = (char *)-1;
1.95 markus 351: }
352: break;
353: case 'm':
354: if (mac_valid(optarg))
355: options.macs = xstrdup(optarg);
356: else {
1.128 fgsch 357: fprintf(stderr, "Unknown mac type '%s'\n",
358: optarg);
1.95 markus 359: exit(1);
1.31 markus 360: }
361: break;
362: case 'p':
1.113 stevesk 363: options.port = a2port(optarg);
364: if (options.port == 0) {
1.109 markus 365: fprintf(stderr, "Bad port '%s'\n", optarg);
366: exit(1);
367: }
1.31 markus 368: break;
369: case 'l':
370: options.user = optarg;
371: break;
1.141 stevesk 372:
373: case 'L':
1.31 markus 374: case 'R':
1.141 stevesk 375: if (sscanf(optarg, "%5[0-9]:%255[^:]:%5[0-9]",
376: sfwd_port, buf, sfwd_host_port) != 3 &&
377: sscanf(optarg, "%5[0-9]/%255[^/]/%5[0-9]",
378: sfwd_port, buf, sfwd_host_port) != 3) {
1.128 fgsch 379: fprintf(stderr,
1.141 stevesk 380: "Bad forwarding specification '%s'\n",
1.128 fgsch 381: optarg);
1.31 markus 382: usage();
383: /* NOTREACHED */
384: }
1.141 stevesk 385: if ((fwd_port = a2port(sfwd_port)) == 0 ||
1.165 markus 386: (fwd_host_port = a2port(sfwd_host_port)) == 0) {
1.128 fgsch 387: fprintf(stderr,
1.141 stevesk 388: "Bad forwarding port(s) '%s'\n", optarg);
389: exit(1);
1.31 markus 390: }
1.141 stevesk 391: if (opt == 'L')
392: add_local_forward(&options, fwd_port, buf,
393: fwd_host_port);
394: else if (opt == 'R')
395: add_remote_forward(&options, fwd_port, buf,
1.151 deraadt 396: fwd_host_port);
1.31 markus 397: break;
1.108 markus 398:
399: case 'D':
1.113 stevesk 400: fwd_port = a2port(optarg);
401: if (fwd_port == 0) {
1.128 fgsch 402: fprintf(stderr, "Bad dynamic port '%s'\n",
403: optarg);
1.109 markus 404: exit(1);
405: }
1.200 markus 406: add_local_forward(&options, fwd_port, "socks", 0);
1.108 markus 407: break;
408:
1.31 markus 409: case 'C':
410: options.compression = 1;
411: break;
1.45 markus 412: case 'N':
413: no_shell_flag = 1;
414: no_tty_flag = 1;
415: break;
416: case 'T':
417: no_tty_flag = 1;
418: break;
1.31 markus 419: case 'o':
420: dummy = 1;
1.205 markus 421: line = xstrdup(optarg);
1.128 fgsch 422: if (process_config_line(&options, host ? host : "",
1.205 markus 423: line, "command-line", 0, &dummy) != 0)
1.31 markus 424: exit(1);
1.205 markus 425: xfree(line);
1.31 markus 426: break;
1.85 djm 427: case 's':
428: subsystem_flag = 1;
1.117 markus 429: break;
430: case 'b':
431: options.bind_address = optarg;
1.85 djm 432: break;
1.139 markus 433: case 'F':
434: config = optarg;
435: break;
1.31 markus 436: default:
437: usage();
1.1 deraadt 438: }
1.31 markus 439: }
440:
1.128 fgsch 441: ac -= optind;
442: av += optind;
443:
444: if (ac > 0 && !host && **av != '-') {
1.188 markus 445: if (strrchr(*av, '@')) {
1.128 fgsch 446: p = xstrdup(*av);
1.188 markus 447: cp = strrchr(p, '@');
1.128 fgsch 448: if (cp == NULL || cp == p)
449: usage();
450: options.user = p;
451: *cp = '\0';
452: host = ++cp;
453: } else
454: host = *av;
1.189 millert 455: if (ac > 1) {
456: optind = optreset = 1;
1.128 fgsch 457: goto again;
458: }
1.189 millert 459: ac--, av++;
1.128 fgsch 460: }
461:
1.31 markus 462: /* Check that we got a host name. */
463: if (!host)
464: usage();
465:
1.54 markus 466: SSLeay_add_all_algorithms();
1.72 markus 467: ERR_load_crypto_strings();
1.31 markus 468:
469: /* Initialize the command to execute on remote host. */
470: buffer_init(&command);
1.1 deraadt 471:
1.33 markus 472: /*
473: * Save the command to execute on the remote host in a buffer. There
474: * is no limit on the length of the command, except by the maximum
475: * packet size. Also sets the tty flag if there is no command.
476: */
1.128 fgsch 477: if (!ac) {
1.31 markus 478: /* No command specified - execute shell on a tty. */
479: tty_flag = 1;
1.85 djm 480: if (subsystem_flag) {
1.128 fgsch 481: fprintf(stderr,
482: "You must specify a subsystem to invoke.\n");
1.85 djm 483: usage();
484: }
1.31 markus 485: } else {
1.128 fgsch 486: /* A command has been specified. Store it into the buffer. */
487: for (i = 0; i < ac; i++) {
488: if (i)
1.31 markus 489: buffer_append(&command, " ", 1);
490: buffer_append(&command, av[i], strlen(av[i]));
491: }
492: }
493:
494: /* Cannot fork to background if no command. */
1.63 markus 495: if (fork_after_authentication_flag && buffer_len(&command) == 0 && !no_shell_flag)
1.31 markus 496: fatal("Cannot fork into background without a command to execute.");
497:
498: /* Allocate a tty by default if no command specified. */
499: if (buffer_len(&command) == 0)
500: tty_flag = 1;
501:
1.180 deraadt 502: /* Force no tty */
1.75 markus 503: if (no_tty_flag)
504: tty_flag = 0;
1.31 markus 505: /* Do not allocate a tty if stdin is not a tty. */
1.79 markus 506: if (!isatty(fileno(stdin)) && !force_tty_flag) {
1.31 markus 507: if (tty_flag)
1.191 itojun 508: logit("Pseudo-terminal will not be allocated because stdin is not a terminal.");
1.31 markus 509: tty_flag = 0;
510: }
1.45 markus 511:
1.101 markus 512: /*
513: * Initialize "log" output. Since we are the client all output
514: * actually goes to stderr.
515: */
1.111 markus 516: log_init(av[0], options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level,
517: SYSLOG_FACILITY_USER, 1);
1.31 markus 518:
1.139 markus 519: /*
520: * Read per-user configuration file. Ignore the system wide config
521: * file if the user specifies a config file on the command line.
522: */
523: if (config != NULL) {
1.142 stevesk 524: if (!read_config_file(config, host, &options))
525: fatal("Can't open user config file %.100s: "
526: "%.100s", config, strerror(errno));
1.139 markus 527: } else {
528: snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir,
529: _PATH_SSH_USER_CONFFILE);
1.145 markus 530: (void)read_config_file(buf, host, &options);
1.139 markus 531:
1.145 markus 532: /* Read systemwide configuration file after use config. */
1.142 stevesk 533: (void)read_config_file(_PATH_HOST_CONFIG_FILE, host, &options);
1.139 markus 534: }
1.31 markus 535:
536: /* Fill configuration defaults. */
537: fill_default_options(&options);
538:
1.196 djm 539: channel_set_af(options.address_family);
540:
1.31 markus 541: /* reinit */
1.101 markus 542: log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1);
1.31 markus 543:
544: if (options.user == NULL)
545: options.user = xstrdup(pw->pw_name);
546:
547: if (options.hostname != NULL)
548: host = options.hostname;
1.195 markus 549:
550: /* force lowercase for hostkey matching */
551: if (options.host_key_alias != NULL) {
552: for (p = options.host_key_alias; *p; p++)
553: if (isupper(*p))
554: *p = tolower(*p);
555: }
1.190 markus 556:
557: if (options.proxy_command != NULL &&
558: strcmp(options.proxy_command, "none") == 0)
559: options.proxy_command = NULL;
1.31 markus 560:
1.77 markus 561: /* Open a connection to the remote host. */
1.203 djm 562: if (ssh_connect(host, &hostaddr, options.port,
1.196 djm 563: options.address_family, options.connection_attempts,
1.177 markus 564: original_effective_uid == 0 && options.use_privileged_port,
1.179 markus 565: options.proxy_command) != 0)
1.178 markus 566: exit(1);
1.31 markus 567:
1.33 markus 568: /*
569: * If we successfully made the connection, load the host private key
570: * in case we will need it later for combined rsa-rhosts
571: * authentication. This must be done before releasing extra
572: * privileges, because the file is only readable by root.
1.174 markus 573: * If we cannot access the private keys, load the public keys
574: * instead and try to execute the ssh-keysign helper instead.
1.33 markus 575: */
1.112 markus 576: sensitive_data.nkeys = 0;
577: sensitive_data.keys = NULL;
1.173 markus 578: sensitive_data.external_keysign = 0;
1.178 markus 579: if (options.rhosts_rsa_authentication ||
580: options.hostbased_authentication) {
1.112 markus 581: sensitive_data.nkeys = 3;
1.180 deraadt 582: sensitive_data.keys = xmalloc(sensitive_data.nkeys *
583: sizeof(Key));
1.177 markus 584:
585: PRIV_START;
1.112 markus 586: sensitive_data.keys[0] = key_load_private_type(KEY_RSA1,
1.105 markus 587: _PATH_HOST_KEY_FILE, "", NULL);
1.112 markus 588: sensitive_data.keys[1] = key_load_private_type(KEY_DSA,
589: _PATH_HOST_DSA_KEY_FILE, "", NULL);
590: sensitive_data.keys[2] = key_load_private_type(KEY_RSA,
591: _PATH_HOST_RSA_KEY_FILE, "", NULL);
1.177 markus 592: PRIV_END;
1.173 markus 593:
1.181 markus 594: if (options.hostbased_authentication == 1 &&
595: sensitive_data.keys[0] == NULL &&
1.173 markus 596: sensitive_data.keys[1] == NULL &&
597: sensitive_data.keys[2] == NULL) {
598: sensitive_data.keys[1] = key_load_public(
599: _PATH_HOST_DSA_KEY_FILE, NULL);
600: sensitive_data.keys[2] = key_load_public(
601: _PATH_HOST_RSA_KEY_FILE, NULL);
602: sensitive_data.external_keysign = 1;
603: }
1.31 markus 604: }
1.33 markus 605: /*
606: * Get rid of any extra privileges that we may have. We will no
607: * longer need them. Also, extra privileges could make it very hard
608: * to read identity files and other non-world-readable files from the
609: * user's home directory if it happens to be on a NFS volume where
610: * root is mapped to nobody.
611: */
1.177 markus 612: seteuid(original_real_uid);
613: setuid(original_real_uid);
1.31 markus 614:
1.33 markus 615: /*
616: * Now that we are back to our own permissions, create ~/.ssh
617: * directory if it doesn\'t already exist.
618: */
1.138 jakob 619: snprintf(buf, sizeof buf, "%.100s%s%.100s", pw->pw_dir, strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR);
1.31 markus 620: if (stat(buf, &st) < 0)
1.57 djm 621: if (mkdir(buf, 0700) < 0)
1.31 markus 622: error("Could not create directory '%.200s'.", buf);
623:
1.104 markus 624: /* load options.identity_files */
625: load_public_identity_files();
626:
627: /* Expand ~ in known host file names. */
628: /* XXX mem-leaks: */
1.72 markus 629: options.system_hostfile =
630: tilde_expand_filename(options.system_hostfile, original_real_uid);
631: options.user_hostfile =
632: tilde_expand_filename(options.user_hostfile, original_real_uid);
633: options.system_hostfile2 =
634: tilde_expand_filename(options.system_hostfile2, original_real_uid);
635: options.user_hostfile2 =
636: tilde_expand_filename(options.user_hostfile2, original_real_uid);
1.149 markus 637:
638: signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */
1.31 markus 639:
640: /* Log into the remote system. This never returns if the login fails. */
1.173 markus 641: ssh_login(&sensitive_data, host, (struct sockaddr *)&hostaddr, pw);
1.31 markus 642:
1.112 markus 643: /* We no longer need the private host keys. Clear them now. */
644: if (sensitive_data.nkeys != 0) {
645: for (i = 0; i < sensitive_data.nkeys; i++) {
646: if (sensitive_data.keys[i] != NULL) {
647: /* Destroys contents safely */
648: debug3("clear hostkey %d", i);
649: key_free(sensitive_data.keys[i]);
650: sensitive_data.keys[i] = NULL;
651: }
652: }
653: xfree(sensitive_data.keys);
1.134 markus 654: }
655: for (i = 0; i < options.num_identity_files; i++) {
656: if (options.identity_files[i]) {
657: xfree(options.identity_files[i]);
658: options.identity_files[i] = NULL;
659: }
660: if (options.identity_keys[i]) {
661: key_free(options.identity_keys[i]);
662: options.identity_keys[i] = NULL;
663: }
1.112 markus 664: }
1.31 markus 665:
1.45 markus 666: exit_status = compat20 ? ssh_session2() : ssh_session();
667: packet_close();
1.186 djm 668:
669: /*
1.203 djm 670: * Send SIGHUP to proxy command if used. We don't wait() in
1.186 djm 671: * case it hangs and instead rely on init to reap the child
672: */
673: if (proxy_command_pid > 1)
674: kill(proxy_command_pid, SIGHUP);
675:
1.45 markus 676: return exit_status;
677: }
678:
1.202 markus 679: #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1"
680:
1.126 itojun 681: static void
1.150 stevesk 682: x11_get_proto(char **_proto, char **_data)
1.50 markus 683: {
1.202 markus 684: char cmd[1024];
1.50 markus 685: char line[512];
1.202 markus 686: char xdisplay[512];
1.150 stevesk 687: static char proto[512], data[512];
1.50 markus 688: FILE *f;
1.202 markus 689: int got_data = 0, generated = 0, do_unlink = 0, i;
690: char *display, *xauthdir, *xauthfile;
1.182 stevesk 691: struct stat st;
1.50 markus 692:
1.202 markus 693: xauthdir = xauthfile = NULL;
1.150 stevesk 694: *_proto = proto;
695: *_data = data;
696: proto[0] = data[0] = '\0';
1.202 markus 697:
1.182 stevesk 698: if (!options.xauth_location ||
699: (stat(options.xauth_location, &st) == -1)) {
700: debug("No xauth program.");
701: } else {
702: if ((display = getenv("DISPLAY")) == NULL) {
703: debug("x11_get_proto: DISPLAY not set");
704: return;
705: }
1.202 markus 706: /*
707: * Handle FamilyLocal case where $DISPLAY does
708: * not match an authorization entry. For this we
709: * just try "xauth list unix:displaynum.screennum".
710: * XXX: "localhost" match to determine FamilyLocal
711: * is not perfect.
712: */
713: if (strncmp(display, "localhost:", 10) == 0) {
714: snprintf(xdisplay, sizeof(xdisplay), "unix:%s",
715: display + 10);
716: display = xdisplay;
717: }
718: if (options.forward_x11_trusted == 0) {
719: xauthdir = xmalloc(MAXPATHLEN);
720: xauthfile = xmalloc(MAXPATHLEN);
721: strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN);
722: if (mkdtemp(xauthdir) != NULL) {
723: do_unlink = 1;
724: snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile",
725: xauthdir);
726: snprintf(cmd, sizeof(cmd),
727: "%s -f %s generate %s " SSH_X11_PROTO
1.207 markus 728: " untrusted timeout 1200 2>" _PATH_DEVNULL,
1.202 markus 729: options.xauth_location, xauthfile, display);
730: debug2("x11_get_proto: %s", cmd);
731: if (system(cmd) == 0)
732: generated = 1;
733: }
734: }
735: snprintf(cmd, sizeof(cmd),
736: "%s %s%s list %s . 2>" _PATH_DEVNULL,
737: options.xauth_location,
738: generated ? "-f " : "" ,
739: generated ? xauthfile : "",
740: display);
741: debug2("x11_get_proto: %s", cmd);
742: f = popen(cmd, "r");
1.55 markus 743: if (f && fgets(line, sizeof(line), f) &&
1.150 stevesk 744: sscanf(line, "%*s %511s %511s", proto, data) == 2)
1.55 markus 745: got_data = 1;
746: if (f)
747: pclose(f);
748: }
1.202 markus 749:
750: if (do_unlink) {
751: unlink(xauthfile);
752: rmdir(xauthdir);
753: }
754: if (xauthdir)
755: xfree(xauthdir);
756: if (xauthfile)
757: xfree(xauthfile);
758:
1.50 markus 759: /*
760: * If we didn't get authentication data, just make up some
761: * data. The forwarding code will check the validity of the
762: * response anyway, and substitute this data. The X11
763: * server, however, will ignore this fake data and use
764: * whatever authentication mechanisms it was using otherwise
765: * for the local connection.
766: */
767: if (!got_data) {
768: u_int32_t rand = 0;
769:
1.202 markus 770: logit("Warning: No xauth data; "
771: "using fake authentication data for X11 forwarding.");
772: strlcpy(proto, SSH_X11_PROTO, sizeof proto);
1.50 markus 773: for (i = 0; i < 16; i++) {
774: if (i % 4 == 0)
775: rand = arc4random();
1.202 markus 776: snprintf(data + 2 * i, sizeof data - 2 * i, "%02x",
777: rand & 0xff);
1.50 markus 778: rand >>= 8;
779: }
780: }
781: }
782:
1.126 itojun 783: static void
1.70 markus 784: ssh_init_forwarding(void)
785: {
1.86 markus 786: int success = 0;
1.70 markus 787: int i;
1.86 markus 788:
1.70 markus 789: /* Initiate local TCP/IP port forwardings. */
790: for (i = 0; i < options.num_local_forwards; i++) {
791: debug("Connections to local port %d forwarded to remote address %.200s:%d",
792: options.local_forwards[i].port,
793: options.local_forwards[i].host,
794: options.local_forwards[i].host_port);
1.158 markus 795: success += channel_setup_local_fwd_listener(
1.70 markus 796: options.local_forwards[i].port,
797: options.local_forwards[i].host,
798: options.local_forwards[i].host_port,
799: options.gateway_ports);
800: }
1.86 markus 801: if (i > 0 && success == 0)
802: error("Could not request local forwarding.");
1.70 markus 803:
804: /* Initiate remote TCP/IP port forwardings. */
805: for (i = 0; i < options.num_remote_forwards; i++) {
806: debug("Connections to remote port %d forwarded to local address %.200s:%d",
807: options.remote_forwards[i].port,
808: options.remote_forwards[i].host,
809: options.remote_forwards[i].host_port);
810: channel_request_remote_forwarding(
811: options.remote_forwards[i].port,
812: options.remote_forwards[i].host,
813: options.remote_forwards[i].host_port);
814: }
815: }
816:
1.126 itojun 817: static void
1.70 markus 818: check_agent_present(void)
819: {
820: if (options.forward_agent) {
821: /* Clear agent forwarding if we don\'t have an agent. */
1.185 stevesk 822: if (!ssh_agent_present())
1.70 markus 823: options.forward_agent = 0;
824: }
825: }
826:
1.126 itojun 827: static int
1.45 markus 828: ssh_session(void)
829: {
830: int type;
831: int interactive = 0;
832: int have_tty = 0;
833: struct winsize ws;
834: char *cp;
835:
1.31 markus 836: /* Enable compression if requested. */
837: if (options.compression) {
838: debug("Requesting compression at level %d.", options.compression_level);
839:
840: if (options.compression_level < 1 || options.compression_level > 9)
841: fatal("Compression level must be from 1 (fast) to 9 (slow, best).");
842:
843: /* Send the request. */
844: packet_start(SSH_CMSG_REQUEST_COMPRESSION);
845: packet_put_int(options.compression_level);
846: packet_send();
847: packet_write_wait();
1.156 markus 848: type = packet_read();
1.31 markus 849: if (type == SSH_SMSG_SUCCESS)
850: packet_start_compression(options.compression_level);
851: else if (type == SSH_SMSG_FAILURE)
1.191 itojun 852: logit("Warning: Remote host refused compression.");
1.31 markus 853: else
854: packet_disconnect("Protocol error waiting for compression response.");
855: }
856: /* Allocate a pseudo tty if appropriate. */
857: if (tty_flag) {
858: debug("Requesting pty.");
859:
860: /* Start the packet. */
861: packet_start(SSH_CMSG_REQUEST_PTY);
862:
863: /* Store TERM in the packet. There is no limit on the
864: length of the string. */
865: cp = getenv("TERM");
866: if (!cp)
867: cp = "";
1.124 markus 868: packet_put_cstring(cp);
1.31 markus 869:
870: /* Store window size in the packet. */
871: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
872: memset(&ws, 0, sizeof(ws));
873: packet_put_int(ws.ws_row);
874: packet_put_int(ws.ws_col);
875: packet_put_int(ws.ws_xpixel);
876: packet_put_int(ws.ws_ypixel);
877:
878: /* Store tty modes in the packet. */
1.115 stevesk 879: tty_make_modes(fileno(stdin), NULL);
1.31 markus 880:
881: /* Send the packet, and wait for it to leave. */
882: packet_send();
883: packet_write_wait();
884:
885: /* Read response from the server. */
1.156 markus 886: type = packet_read();
1.43 markus 887: if (type == SSH_SMSG_SUCCESS) {
1.31 markus 888: interactive = 1;
1.45 markus 889: have_tty = 1;
1.43 markus 890: } else if (type == SSH_SMSG_FAILURE)
1.191 itojun 891: logit("Warning: Remote host failed or refused to allocate a pseudo tty.");
1.31 markus 892: else
893: packet_disconnect("Protocol error waiting for pty request response.");
894: }
895: /* Request X11 forwarding if enabled and DISPLAY is set. */
896: if (options.forward_x11 && getenv("DISPLAY") != NULL) {
1.150 stevesk 897: char *proto, *data;
1.50 markus 898: /* Get reasonable local authentication information. */
1.150 stevesk 899: x11_get_proto(&proto, &data);
1.50 markus 900: /* Request forwarding with authentication spoofing. */
1.31 markus 901: debug("Requesting X11 forwarding with authentication spoofing.");
1.50 markus 902: x11_request_forwarding_with_spoofing(0, proto, data);
1.31 markus 903:
904: /* Read response from the server. */
1.156 markus 905: type = packet_read();
1.31 markus 906: if (type == SSH_SMSG_SUCCESS) {
907: interactive = 1;
1.50 markus 908: } else if (type == SSH_SMSG_FAILURE) {
1.191 itojun 909: logit("Warning: Remote host denied X11 forwarding.");
1.50 markus 910: } else {
1.31 markus 911: packet_disconnect("Protocol error waiting for X11 forwarding");
1.50 markus 912: }
1.31 markus 913: }
914: /* Tell the packet module whether this is an interactive session. */
1.80 markus 915: packet_set_interactive(interactive);
1.31 markus 916:
917: /* Request authentication agent forwarding if appropriate. */
1.70 markus 918: check_agent_present();
919:
1.31 markus 920: if (options.forward_agent) {
921: debug("Requesting authentication agent forwarding.");
922: auth_request_forwarding();
923:
924: /* Read response from the server. */
1.156 markus 925: type = packet_read();
1.155 markus 926: packet_check_eom();
1.31 markus 927: if (type != SSH_SMSG_SUCCESS)
1.191 itojun 928: logit("Warning: Remote host denied authentication agent forwarding.");
1.31 markus 929: }
930:
1.70 markus 931: /* Initiate port forwardings. */
932: ssh_init_forwarding();
1.34 markus 933:
934: /* If requested, let ssh continue in the background. */
1.48 markus 935: if (fork_after_authentication_flag)
1.34 markus 936: if (daemon(1, 1) < 0)
937: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 938:
1.33 markus 939: /*
940: * If a command was specified on the command line, execute the
941: * command now. Otherwise request the server to start a shell.
942: */
1.31 markus 943: if (buffer_len(&command) > 0) {
944: int len = buffer_len(&command);
945: if (len > 900)
946: len = 900;
1.152 stevesk 947: debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
1.31 markus 948: packet_start(SSH_CMSG_EXEC_CMD);
949: packet_put_string(buffer_ptr(&command), buffer_len(&command));
950: packet_send();
951: packet_write_wait();
952: } else {
953: debug("Requesting shell.");
954: packet_start(SSH_CMSG_EXEC_SHELL);
955: packet_send();
956: packet_write_wait();
957: }
958:
959: /* Enter the interactive session. */
1.119 stevesk 960: return client_loop(have_tty, tty_flag ?
961: options.escape_char : SSH_ESCAPECHAR_NONE, 0);
1.45 markus 962: }
963:
1.126 itojun 964: static void
1.157 markus 965: client_subsystem_reply(int type, u_int32_t seq, void *ctxt)
1.89 markus 966: {
967: int id, len;
968:
969: id = packet_get_int();
970: len = buffer_len(&command);
1.100 markus 971: if (len > 900)
972: len = 900;
1.155 markus 973: packet_check_eom();
1.89 markus 974: if (type == SSH2_MSG_CHANNEL_FAILURE)
975: fatal("Request for subsystem '%.*s' failed on channel %d",
1.152 stevesk 976: len, (u_char *)buffer_ptr(&command), id);
1.170 markus 977: }
978:
979: void
1.206 markus 980: client_global_request_reply_fwd(int type, u_int32_t seq, void *ctxt)
1.170 markus 981: {
982: int i;
983:
984: i = client_global_request_id++;
1.206 markus 985: if (i >= options.num_remote_forwards)
1.170 markus 986: return;
987: debug("remote forward %s for: listen %d, connect %s:%d",
988: type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure",
989: options.remote_forwards[i].port,
990: options.remote_forwards[i].host,
991: options.remote_forwards[i].host_port);
992: if (type == SSH2_MSG_REQUEST_FAILURE)
1.191 itojun 993: logit("Warning: remote port forwarding failed for listen port %d",
1.170 markus 994: options.remote_forwards[i].port);
1.89 markus 995: }
996:
1.143 markus 997: /* request pty/x11/agent/tcpfwd/shell for channel */
1.126 itojun 998: static void
1.143 markus 999: ssh_session2_setup(int id, void *arg)
1.45 markus 1000: {
1001: int len;
1.80 markus 1002: int interactive = 0;
1.115 stevesk 1003: struct termios tio;
1.80 markus 1004:
1.187 markus 1005: debug2("ssh_session2_setup: id %d", id);
1.31 markus 1006:
1.45 markus 1007: if (tty_flag) {
1008: struct winsize ws;
1009: char *cp;
1010: cp = getenv("TERM");
1011: if (!cp)
1012: cp = "";
1013: /* Store window size in the packet. */
1014: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
1015: memset(&ws, 0, sizeof(ws));
1016:
1017: channel_request_start(id, "pty-req", 0);
1018: packet_put_cstring(cp);
1019: packet_put_int(ws.ws_col);
1020: packet_put_int(ws.ws_row);
1021: packet_put_int(ws.ws_xpixel);
1022: packet_put_int(ws.ws_ypixel);
1.115 stevesk 1023: tio = get_saved_tio();
1024: tty_make_modes(/*ignored*/ 0, &tio);
1.45 markus 1025: packet_send();
1.80 markus 1026: interactive = 1;
1.45 markus 1027: /* XXX wait for reply */
1028: }
1.50 markus 1029: if (options.forward_x11 &&
1030: getenv("DISPLAY") != NULL) {
1.150 stevesk 1031: char *proto, *data;
1.50 markus 1032: /* Get reasonable local authentication information. */
1.150 stevesk 1033: x11_get_proto(&proto, &data);
1.50 markus 1034: /* Request forwarding with authentication spoofing. */
1035: debug("Requesting X11 forwarding with authentication spoofing.");
1036: x11_request_forwarding_with_spoofing(id, proto, data);
1.80 markus 1037: interactive = 1;
1.50 markus 1038: /* XXX wait for reply */
1039: }
1040:
1.70 markus 1041: check_agent_present();
1042: if (options.forward_agent) {
1043: debug("Requesting authentication agent forwarding.");
1044: channel_request_start(id, "auth-agent-req@openssh.com", 0);
1045: packet_send();
1046: }
1047:
1.45 markus 1048: len = buffer_len(&command);
1049: if (len > 0) {
1050: if (len > 900)
1051: len = 900;
1.85 djm 1052: if (subsystem_flag) {
1.152 stevesk 1053: debug("Sending subsystem: %.*s", len, (u_char *)buffer_ptr(&command));
1.89 markus 1054: channel_request_start(id, "subsystem", /*want reply*/ 1);
1055: /* register callback for reply */
1.172 deraadt 1056: /* XXX we assume that client_loop has already been called */
1.89 markus 1057: dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &client_subsystem_reply);
1058: dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &client_subsystem_reply);
1.85 djm 1059: } else {
1.152 stevesk 1060: debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
1.85 djm 1061: channel_request_start(id, "exec", 0);
1062: }
1.100 markus 1063: packet_put_string(buffer_ptr(&command), buffer_len(&command));
1.45 markus 1064: packet_send();
1065: } else {
1.161 markus 1066: channel_request_start(id, "shell", 0);
1067: packet_send();
1.45 markus 1068: }
1.90 markus 1069:
1.80 markus 1070: packet_set_interactive(interactive);
1.45 markus 1071: }
1072:
1.143 markus 1073: /* open new channel for a session */
1.126 itojun 1074: static int
1.143 markus 1075: ssh_session2_open(void)
1.45 markus 1076: {
1.118 markus 1077: Channel *c;
1078: int window, packetmax, in, out, err;
1.60 markus 1079:
1.62 markus 1080: if (stdin_null_flag) {
1.93 itojun 1081: in = open(_PATH_DEVNULL, O_RDONLY);
1.62 markus 1082: } else {
1083: in = dup(STDIN_FILENO);
1084: }
1.60 markus 1085: out = dup(STDOUT_FILENO);
1086: err = dup(STDERR_FILENO);
1.45 markus 1087:
1088: if (in < 0 || out < 0 || err < 0)
1.62 markus 1089: fatal("dup() in/out/err failed");
1.45 markus 1090:
1.69 markus 1091: /* enable nonblocking unless tty */
1092: if (!isatty(in))
1093: set_nonblock(in);
1094: if (!isatty(out))
1095: set_nonblock(out);
1096: if (!isatty(err))
1097: set_nonblock(err);
1098:
1.65 markus 1099: window = CHAN_SES_WINDOW_DEFAULT;
1100: packetmax = CHAN_SES_PACKET_DEFAULT;
1.164 markus 1101: if (tty_flag) {
1102: window >>= 1;
1103: packetmax >>= 1;
1.45 markus 1104: }
1.118 markus 1105: c = channel_new(
1.45 markus 1106: "session", SSH_CHANNEL_OPENING, in, out, err,
1.65 markus 1107: window, packetmax, CHAN_EXTENDED_WRITE,
1.192 markus 1108: "client-session", /*nonblock*/0);
1.45 markus 1109:
1.143 markus 1110: debug3("ssh_session2_open: channel_new: %d", c->self);
1.106 markus 1111:
1.122 markus 1112: channel_send_open(c->self);
1.143 markus 1113: if (!no_shell_flag)
1.160 markus 1114: channel_register_confirm(c->self, ssh_session2_setup);
1.106 markus 1115:
1.118 markus 1116: return c->self;
1.106 markus 1117: }
1118:
1.126 itojun 1119: static int
1.106 markus 1120: ssh_session2(void)
1121: {
1.143 markus 1122: int id = -1;
1.106 markus 1123:
1124: /* XXX should be pre-session */
1125: ssh_init_forwarding();
1126:
1.143 markus 1127: if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN))
1128: id = ssh_session2_open();
1.106 markus 1129:
1130: /* If requested, let ssh continue in the background. */
1131: if (fork_after_authentication_flag)
1132: if (daemon(1, 1) < 0)
1133: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 1134:
1.119 stevesk 1135: return client_loop(tty_flag, tty_flag ?
1136: options.escape_char : SSH_ESCAPECHAR_NONE, id);
1.72 markus 1137: }
1138:
1.126 itojun 1139: static void
1.104 markus 1140: load_public_identity_files(void)
1141: {
1142: char *filename;
1.167 markus 1143: int i = 0;
1.104 markus 1144: Key *public;
1.167 markus 1145: #ifdef SMARTCARD
1146: Key **keys;
1.104 markus 1147:
1.133 markus 1148: if (options.smartcard_device != NULL &&
1.167 markus 1149: options.num_identity_files < SSH_MAX_IDENTITY_FILES &&
1150: (keys = sc_get_keys(options.smartcard_device, NULL)) != NULL ) {
1151: int count = 0;
1152: for (i = 0; keys[i] != NULL; i++) {
1153: count++;
1154: memmove(&options.identity_files[1], &options.identity_files[0],
1155: sizeof(char *) * (SSH_MAX_IDENTITY_FILES - 1));
1156: memmove(&options.identity_keys[1], &options.identity_keys[0],
1157: sizeof(Key *) * (SSH_MAX_IDENTITY_FILES - 1));
1158: options.num_identity_files++;
1159: options.identity_keys[0] = keys[i];
1.194 markus 1160: options.identity_files[0] = sc_get_key_label(keys[i]);
1.167 markus 1161: }
1.168 markus 1162: if (options.num_identity_files > SSH_MAX_IDENTITY_FILES)
1163: options.num_identity_files = SSH_MAX_IDENTITY_FILES;
1.167 markus 1164: i = count;
1165: xfree(keys);
1.127 markus 1166: }
1.136 jakob 1167: #endif /* SMARTCARD */
1.131 millert 1168: for (; i < options.num_identity_files; i++) {
1169: filename = tilde_expand_filename(options.identity_files[i],
1170: original_real_uid);
1171: public = key_load_public(filename, NULL);
1172: debug("identity file %s type %d", filename,
1173: public ? public->type : -1);
1174: xfree(options.identity_files[i]);
1175: options.identity_files[i] = filename;
1176: options.identity_keys[i] = public;
1177: }
1.1 deraadt 1178: }
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