Annotation of src/usr.bin/ssh/ssh.c, Revision 1.184
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.
1.169 markus 16: * Copyright (c) 2000, 2001, 2002 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"
1.184 ! stevesk 43: RCSID("$OpenBSD: ssh.c,v 1.183 2002/08/29 16:02:54 stevesk 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:
1.37 markus 78: /* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
79: Default value is AF_UNSPEC means both IPv4 and IPv6. */
80: int IPv4or6 = AF_UNSPEC;
81:
1.31 markus 82: /* Flag indicating whether debug mode is on. This can be set on the command line. */
1.1 deraadt 83: int debug_flag = 0;
84:
1.46 markus 85: /* Flag indicating whether a tty should be allocated */
1.1 deraadt 86: int tty_flag = 0;
1.79 markus 87: int no_tty_flag = 0;
88: int force_tty_flag = 0;
1.1 deraadt 89:
1.45 markus 90: /* don't exec a shell */
91: int no_shell_flag = 0;
92:
1.33 markus 93: /*
94: * Flag indicating that nothing should be read from stdin. This can be set
95: * on the command line.
96: */
1.1 deraadt 97: int stdin_null_flag = 0;
98:
1.33 markus 99: /*
100: * Flag indicating that ssh should fork after authentication. This is useful
1.172 deraadt 101: * so that the passphrase can be entered manually, and then ssh goes to the
1.33 markus 102: * background.
103: */
1.1 deraadt 104: int fork_after_authentication_flag = 0;
105:
1.33 markus 106: /*
107: * General data structure for command line options and options configurable
108: * in configuration files. See readconf.h.
109: */
1.1 deraadt 110: Options options;
111:
1.139 markus 112: /* optional user configfile */
113: char *config = NULL;
114:
1.33 markus 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: */
1.1 deraadt 120: char *host;
121:
1.22 provos 122: /* socket address the host resolves to */
1.37 markus 123: struct sockaddr_storage hostaddr;
1.1 deraadt 124:
1.112 markus 125: /* Private host keys. */
1.173 markus 126: Sensitive sensitive_data;
1.1 deraadt 127:
1.10 dugsong 128: /* Original real UID. */
129: uid_t original_real_uid;
1.177 markus 130: uid_t original_effective_uid;
1.1 deraadt 131:
1.45 markus 132: /* command to be executed */
133: Buffer command;
134:
1.85 djm 135: /* Should we execute a command or invoke a subsystem? */
136: int subsystem_flag = 0;
137:
1.170 markus 138: /* # of replies received for global requests */
139: static int client_global_request_id = 0;
140:
1.1 deraadt 141: /* Prints a help message to the user. This function never returns. */
142:
1.126 itojun 143: static void
1.93 itojun 144: usage(void)
1.1 deraadt 145: {
1.76 markus 146: fprintf(stderr, "Usage: %s [options] host [command]\n", __progname);
1.31 markus 147: fprintf(stderr, "Options:\n");
148: fprintf(stderr, " -l user Log in using this user name.\n");
1.93 itojun 149: fprintf(stderr, " -n Redirect input from " _PATH_DEVNULL ".\n");
1.139 markus 150: fprintf(stderr, " -F config Config file (default: ~/%s).\n",
151: _PATH_SSH_USER_CONFFILE);
1.53 markus 152: fprintf(stderr, " -A Enable authentication agent forwarding.\n");
1.120 markus 153: fprintf(stderr, " -a Disable authentication agent forwarding (default).\n");
1.9 dugsong 154: #ifdef AFS
1.31 markus 155: fprintf(stderr, " -k Disable Kerberos ticket and AFS token forwarding.\n");
156: #endif /* AFS */
1.88 stevesk 157: fprintf(stderr, " -X Enable X11 connection forwarding.\n");
1.120 markus 158: fprintf(stderr, " -x Disable X11 connection forwarding (default).\n");
1.99 deraadt 159: fprintf(stderr, " -i file Identity for public key authentication "
160: "(default: ~/.ssh/identity)\n");
1.135 jakob 161: #ifdef SMARTCARD
162: fprintf(stderr, " -I reader Set smartcard reader.\n");
1.137 jakob 163: #endif
1.31 markus 164: fprintf(stderr, " -t Tty; allocate a tty even if command is given.\n");
1.45 markus 165: fprintf(stderr, " -T Do not allocate a tty.\n");
1.31 markus 166: fprintf(stderr, " -v Verbose; display verbose debugging messages.\n");
1.66 markus 167: fprintf(stderr, " Multiple -v increases verbosity.\n");
1.31 markus 168: fprintf(stderr, " -V Display version number only.\n");
169: fprintf(stderr, " -q Quiet; don't display any warning messages.\n");
170: fprintf(stderr, " -f Fork into background after authentication.\n");
171: fprintf(stderr, " -e char Set escape character; ``none'' = disable (default: ~).\n");
172:
1.120 markus 173: fprintf(stderr, " -c cipher Select encryption algorithm\n");
1.102 stevesk 174: fprintf(stderr, " -m macs Specify MAC algorithms for protocol version 2.\n");
1.31 markus 175: fprintf(stderr, " -p port Connect to this port. Server must be on the same port.\n");
176: fprintf(stderr, " -L listen-port:host:port Forward local port to remote address\n");
177: fprintf(stderr, " -R listen-port:host:port Forward remote port to local address\n");
1.76 markus 178: fprintf(stderr, " These cause %s to listen for connections on a port, and\n", __progname);
1.31 markus 179: fprintf(stderr, " forward them to the other side by connecting to host:port.\n");
1.140 stevesk 180: fprintf(stderr, " -D port Enable dynamic application-level port forwarding.\n");
1.31 markus 181: fprintf(stderr, " -C Enable compression.\n");
1.45 markus 182: fprintf(stderr, " -N Do not execute a shell or command.\n");
1.31 markus 183: fprintf(stderr, " -g Allow remote hosts to connect to forwarded ports.\n");
1.92 jakob 184: fprintf(stderr, " -1 Force protocol version 1.\n");
185: fprintf(stderr, " -2 Force protocol version 2.\n");
1.37 markus 186: fprintf(stderr, " -4 Use IPv4 only.\n");
187: fprintf(stderr, " -6 Use IPv6 only.\n");
1.31 markus 188: fprintf(stderr, " -o 'option' Process the option as if it was read from a configuration file.\n");
1.85 djm 189: fprintf(stderr, " -s Invoke command (mandatory) as SSH2 subsystem.\n");
1.120 markus 190: fprintf(stderr, " -b addr Local IP address.\n");
1.31 markus 191: exit(1);
1.1 deraadt 192: }
193:
1.126 itojun 194: static int ssh_session(void);
195: static int ssh_session2(void);
196: static void load_public_identity_files(void);
1.45 markus 197:
1.32 deraadt 198: /*
199: * Main program for the ssh client.
200: */
1.2 provos 201: int
202: main(int ac, char **av)
1.1 deraadt 203: {
1.178 markus 204: int i, opt, exit_status;
1.35 markus 205: u_short fwd_port, fwd_host_port;
1.141 stevesk 206: char sfwd_port[6], sfwd_host_port[6];
1.128 fgsch 207: char *p, *cp, buf[256];
1.31 markus 208: struct stat st;
1.98 markus 209: struct passwd *pw;
1.45 markus 210: int dummy;
1.144 stevesk 211: extern int optind, optreset;
212: extern char *optarg;
1.31 markus 213:
1.33 markus 214: /*
215: * Save the original real uid. It will be needed later (uid-swapping
216: * may clobber the real uid).
217: */
1.31 markus 218: original_real_uid = getuid();
219: original_effective_uid = geteuid();
220:
1.184 ! stevesk 221: /*
! 222: * Use uid-swapping to give up root privileges for the duration of
! 223: * option processing. We will re-instantiate the rights when we are
! 224: * ready to create the privileged port, and will permanently drop
! 225: * them when the port has been created (actually, when the connection
! 226: * has been made, as we may need to create the port several times).
! 227: */
! 228: PRIV_END;
! 229:
1.31 markus 230: /* If we are installed setuid root be careful to not drop core. */
231: if (original_real_uid != original_effective_uid) {
232: struct rlimit rlim;
233: rlim.rlim_cur = rlim.rlim_max = 0;
234: if (setrlimit(RLIMIT_CORE, &rlim) < 0)
235: fatal("setrlimit failed: %.100s", strerror(errno));
1.1 deraadt 236: }
1.107 markus 237: /* Get user data. */
238: pw = getpwuid(original_real_uid);
239: if (!pw) {
240: log("You don't exist, go away!");
241: exit(1);
242: }
243: /* Take a copy of the returned structure. */
244: pw = pwcopy(pw);
1.31 markus 245:
1.33 markus 246: /*
247: * Set our umask to something reasonable, as some files are created
248: * with the default umask. This will make them world-readable but
249: * writable only by the owner, which is ok for all files for which we
250: * don't set the modes explicitly.
251: */
1.31 markus 252: umask(022);
253:
254: /* Initialize option structure to indicate that no values have been set. */
255: initialize_options(&options);
256:
257: /* Parse command-line arguments. */
258: host = NULL;
259:
1.128 fgsch 260: again:
261: while ((opt = getopt(ac, av,
1.139 markus 262: "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:NPR:TVX")) != -1) {
1.31 markus 263: switch (opt) {
1.91 jakob 264: case '1':
265: options.protocol = SSH_PROTO_1;
266: break;
1.47 markus 267: case '2':
268: options.protocol = SSH_PROTO_2;
269: break;
1.37 markus 270: case '4':
271: IPv4or6 = AF_INET;
272: break;
273: case '6':
274: IPv4or6 = AF_INET6;
275: break;
1.31 markus 276: case 'n':
277: stdin_null_flag = 1;
278: break;
279: case 'f':
280: fork_after_authentication_flag = 1;
281: stdin_null_flag = 1;
282: break;
283: case 'x':
284: options.forward_x11 = 0;
285: break;
286: case 'X':
287: options.forward_x11 = 1;
288: break;
289: case 'g':
290: options.gateway_ports = 1;
291: break;
1.183 stevesk 292: case 'P': /* deprecated */
1.31 markus 293: options.use_privileged_port = 0;
294: break;
295: case 'a':
296: options.forward_agent = 0;
1.53 markus 297: break;
298: case 'A':
299: options.forward_agent = 1;
1.31 markus 300: break;
1.9 dugsong 301: #ifdef AFS
1.31 markus 302: case 'k':
303: options.kerberos_tgt_passing = 0;
304: options.afs_token_passing = 0;
305: break;
1.1 deraadt 306: #endif
1.31 markus 307: case 'i':
308: if (stat(optarg, &st) < 0) {
1.128 fgsch 309: fprintf(stderr, "Warning: Identity file %s "
310: "does not exist.\n", optarg);
1.31 markus 311: break;
312: }
1.128 fgsch 313: if (options.num_identity_files >=
314: SSH_MAX_IDENTITY_FILES)
315: fatal("Too many identity files specified "
316: "(max %d)", SSH_MAX_IDENTITY_FILES);
317: options.identity_files[options.num_identity_files++] =
318: xstrdup(optarg);
1.31 markus 319: break;
1.127 markus 320: case 'I':
321: #ifdef SMARTCARD
1.133 markus 322: options.smartcard_device = xstrdup(optarg);
1.137 jakob 323: #else
1.127 markus 324: fprintf(stderr, "no support for smartcards.\n");
1.137 jakob 325: #endif
1.127 markus 326: break;
1.31 markus 327: case 't':
1.79 markus 328: if (tty_flag)
329: force_tty_flag = 1;
1.31 markus 330: tty_flag = 1;
331: break;
332: case 'v':
1.66 markus 333: if (0 == debug_flag) {
334: debug_flag = 1;
335: options.log_level = SYSLOG_LEVEL_DEBUG1;
336: } else if (options.log_level < SYSLOG_LEVEL_DEBUG3) {
337: options.log_level++;
338: break;
1.128 fgsch 339: } else
1.103 millert 340: fatal("Too high debugging level.");
1.66 markus 341: /* fallthrough */
1.31 markus 342: case 'V':
1.96 deraadt 343: fprintf(stderr,
344: "%s, SSH protocols %d.%d/%d.%d, OpenSSL 0x%8.8lx\n",
1.46 markus 345: SSH_VERSION,
346: PROTOCOL_MAJOR_1, PROTOCOL_MINOR_1,
1.96 deraadt 347: PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2,
348: SSLeay());
1.31 markus 349: if (opt == 'V')
350: exit(0);
351: break;
352: case 'q':
353: options.log_level = SYSLOG_LEVEL_QUIET;
354: break;
355: case 'e':
356: if (optarg[0] == '^' && optarg[2] == 0 &&
1.128 fgsch 357: (u_char) optarg[1] >= 64 &&
358: (u_char) optarg[1] < 128)
1.78 markus 359: options.escape_char = (u_char) optarg[1] & 31;
1.31 markus 360: else if (strlen(optarg) == 1)
1.78 markus 361: options.escape_char = (u_char) optarg[0];
1.31 markus 362: else if (strcmp(optarg, "none") == 0)
1.119 stevesk 363: options.escape_char = SSH_ESCAPECHAR_NONE;
1.31 markus 364: else {
1.128 fgsch 365: fprintf(stderr, "Bad escape character '%s'.\n",
366: optarg);
1.31 markus 367: exit(1);
368: }
369: break;
370: case 'c':
1.49 markus 371: if (ciphers_valid(optarg)) {
372: /* SSH2 only */
373: options.ciphers = xstrdup(optarg);
1.51 markus 374: options.cipher = SSH_CIPHER_ILLEGAL;
1.49 markus 375: } else {
376: /* SSH1 only */
1.74 markus 377: options.cipher = cipher_number(optarg);
378: if (options.cipher == -1) {
1.128 fgsch 379: fprintf(stderr,
380: "Unknown cipher type '%s'\n",
381: optarg);
1.49 markus 382: exit(1);
383: }
1.128 fgsch 384: if (options.cipher == SSH_CIPHER_3DES)
1.74 markus 385: options.ciphers = "3des-cbc";
1.128 fgsch 386: else if (options.cipher == SSH_CIPHER_BLOWFISH)
1.74 markus 387: options.ciphers = "blowfish-cbc";
1.128 fgsch 388: else
1.74 markus 389: options.ciphers = (char *)-1;
1.95 markus 390: }
391: break;
392: case 'm':
393: if (mac_valid(optarg))
394: options.macs = xstrdup(optarg);
395: else {
1.128 fgsch 396: fprintf(stderr, "Unknown mac type '%s'\n",
397: optarg);
1.95 markus 398: exit(1);
1.31 markus 399: }
400: break;
401: case 'p':
1.113 stevesk 402: options.port = a2port(optarg);
403: if (options.port == 0) {
1.109 markus 404: fprintf(stderr, "Bad port '%s'\n", optarg);
405: exit(1);
406: }
1.31 markus 407: break;
408: case 'l':
409: options.user = optarg;
410: break;
1.141 stevesk 411:
412: case 'L':
1.31 markus 413: case 'R':
1.141 stevesk 414: if (sscanf(optarg, "%5[0-9]:%255[^:]:%5[0-9]",
415: sfwd_port, buf, sfwd_host_port) != 3 &&
416: sscanf(optarg, "%5[0-9]/%255[^/]/%5[0-9]",
417: sfwd_port, buf, sfwd_host_port) != 3) {
1.128 fgsch 418: fprintf(stderr,
1.141 stevesk 419: "Bad forwarding specification '%s'\n",
1.128 fgsch 420: optarg);
1.31 markus 421: usage();
422: /* NOTREACHED */
423: }
1.141 stevesk 424: if ((fwd_port = a2port(sfwd_port)) == 0 ||
1.165 markus 425: (fwd_host_port = a2port(sfwd_host_port)) == 0) {
1.128 fgsch 426: fprintf(stderr,
1.141 stevesk 427: "Bad forwarding port(s) '%s'\n", optarg);
428: exit(1);
1.31 markus 429: }
1.141 stevesk 430: if (opt == 'L')
431: add_local_forward(&options, fwd_port, buf,
432: fwd_host_port);
433: else if (opt == 'R')
434: add_remote_forward(&options, fwd_port, buf,
1.151 deraadt 435: fwd_host_port);
1.31 markus 436: break;
1.108 markus 437:
438: case 'D':
1.113 stevesk 439: fwd_port = a2port(optarg);
440: if (fwd_port == 0) {
1.128 fgsch 441: fprintf(stderr, "Bad dynamic port '%s'\n",
442: optarg);
1.109 markus 443: exit(1);
444: }
1.108 markus 445: add_local_forward(&options, fwd_port, "socks4", 0);
446: break;
447:
1.31 markus 448: case 'C':
449: options.compression = 1;
450: break;
1.45 markus 451: case 'N':
452: no_shell_flag = 1;
453: no_tty_flag = 1;
454: break;
455: case 'T':
456: no_tty_flag = 1;
457: break;
1.31 markus 458: case 'o':
459: dummy = 1;
1.128 fgsch 460: if (process_config_line(&options, host ? host : "",
461: optarg, "command-line", 0, &dummy) != 0)
1.31 markus 462: exit(1);
463: break;
1.85 djm 464: case 's':
465: subsystem_flag = 1;
1.117 markus 466: break;
467: case 'b':
468: options.bind_address = optarg;
1.85 djm 469: break;
1.139 markus 470: case 'F':
471: config = optarg;
472: break;
1.31 markus 473: default:
474: usage();
1.1 deraadt 475: }
1.31 markus 476: }
477:
1.128 fgsch 478: ac -= optind;
479: av += optind;
480:
481: if (ac > 0 && !host && **av != '-') {
482: if (strchr(*av, '@')) {
483: p = xstrdup(*av);
484: cp = strchr(p, '@');
485: if (cp == NULL || cp == p)
486: usage();
487: options.user = p;
488: *cp = '\0';
489: host = ++cp;
490: } else
491: host = *av;
492: ac--, av++;
493: if (ac > 0) {
494: optind = 0;
495: optreset = 1;
496: goto again;
497: }
498: }
499:
1.31 markus 500: /* Check that we got a host name. */
501: if (!host)
502: usage();
503:
1.54 markus 504: SSLeay_add_all_algorithms();
1.72 markus 505: ERR_load_crypto_strings();
1.146 markus 506: channel_set_af(IPv4or6);
1.31 markus 507:
508: /* Initialize the command to execute on remote host. */
509: buffer_init(&command);
1.1 deraadt 510:
1.33 markus 511: /*
512: * Save the command to execute on the remote host in a buffer. There
513: * is no limit on the length of the command, except by the maximum
514: * packet size. Also sets the tty flag if there is no command.
515: */
1.128 fgsch 516: if (!ac) {
1.31 markus 517: /* No command specified - execute shell on a tty. */
518: tty_flag = 1;
1.85 djm 519: if (subsystem_flag) {
1.128 fgsch 520: fprintf(stderr,
521: "You must specify a subsystem to invoke.\n");
1.85 djm 522: usage();
523: }
1.31 markus 524: } else {
1.128 fgsch 525: /* A command has been specified. Store it into the buffer. */
526: for (i = 0; i < ac; i++) {
527: if (i)
1.31 markus 528: buffer_append(&command, " ", 1);
529: buffer_append(&command, av[i], strlen(av[i]));
530: }
531: }
532:
533: /* Cannot fork to background if no command. */
1.63 markus 534: if (fork_after_authentication_flag && buffer_len(&command) == 0 && !no_shell_flag)
1.31 markus 535: fatal("Cannot fork into background without a command to execute.");
536:
537: /* Allocate a tty by default if no command specified. */
538: if (buffer_len(&command) == 0)
539: tty_flag = 1;
540:
1.180 deraadt 541: /* Force no tty */
1.75 markus 542: if (no_tty_flag)
543: tty_flag = 0;
1.31 markus 544: /* Do not allocate a tty if stdin is not a tty. */
1.79 markus 545: if (!isatty(fileno(stdin)) && !force_tty_flag) {
1.31 markus 546: if (tty_flag)
1.103 millert 547: log("Pseudo-terminal will not be allocated because stdin is not a terminal.");
1.31 markus 548: tty_flag = 0;
549: }
1.45 markus 550:
1.101 markus 551: /*
552: * Initialize "log" output. Since we are the client all output
553: * actually goes to stderr.
554: */
1.111 markus 555: log_init(av[0], options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level,
556: SYSLOG_FACILITY_USER, 1);
1.31 markus 557:
1.139 markus 558: /*
559: * Read per-user configuration file. Ignore the system wide config
560: * file if the user specifies a config file on the command line.
561: */
562: if (config != NULL) {
1.142 stevesk 563: if (!read_config_file(config, host, &options))
564: fatal("Can't open user config file %.100s: "
565: "%.100s", config, strerror(errno));
1.139 markus 566: } else {
567: snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir,
568: _PATH_SSH_USER_CONFFILE);
1.145 markus 569: (void)read_config_file(buf, host, &options);
1.139 markus 570:
1.145 markus 571: /* Read systemwide configuration file after use config. */
1.142 stevesk 572: (void)read_config_file(_PATH_HOST_CONFIG_FILE, host, &options);
1.139 markus 573: }
1.31 markus 574:
575: /* Fill configuration defaults. */
576: fill_default_options(&options);
577:
578: /* reinit */
1.101 markus 579: log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1);
1.31 markus 580:
581: if (options.user == NULL)
582: options.user = xstrdup(pw->pw_name);
583:
584: if (options.hostname != NULL)
585: host = options.hostname;
586:
587: /* Disable rhosts authentication if not running as root. */
588: if (original_effective_uid != 0 || !options.use_privileged_port) {
1.77 markus 589: debug("Rhosts Authentication disabled, "
1.71 markus 590: "originating port will not be trusted.");
1.31 markus 591: options.rhosts_authentication = 0;
592: }
1.77 markus 593: /* Open a connection to the remote host. */
1.31 markus 594:
1.178 markus 595: if (ssh_connect(host, &hostaddr, options.port, IPv4or6,
1.77 markus 596: options.connection_attempts,
1.177 markus 597: original_effective_uid == 0 && options.use_privileged_port,
1.179 markus 598: options.proxy_command) != 0)
1.178 markus 599: exit(1);
1.31 markus 600:
1.33 markus 601: /*
602: * If we successfully made the connection, load the host private key
603: * in case we will need it later for combined rsa-rhosts
604: * authentication. This must be done before releasing extra
605: * privileges, because the file is only readable by root.
1.174 markus 606: * If we cannot access the private keys, load the public keys
607: * instead and try to execute the ssh-keysign helper instead.
1.33 markus 608: */
1.112 markus 609: sensitive_data.nkeys = 0;
610: sensitive_data.keys = NULL;
1.173 markus 611: sensitive_data.external_keysign = 0;
1.178 markus 612: if (options.rhosts_rsa_authentication ||
613: options.hostbased_authentication) {
1.112 markus 614: sensitive_data.nkeys = 3;
1.180 deraadt 615: sensitive_data.keys = xmalloc(sensitive_data.nkeys *
616: sizeof(Key));
1.177 markus 617:
618: PRIV_START;
1.112 markus 619: sensitive_data.keys[0] = key_load_private_type(KEY_RSA1,
1.105 markus 620: _PATH_HOST_KEY_FILE, "", NULL);
1.112 markus 621: sensitive_data.keys[1] = key_load_private_type(KEY_DSA,
622: _PATH_HOST_DSA_KEY_FILE, "", NULL);
623: sensitive_data.keys[2] = key_load_private_type(KEY_RSA,
624: _PATH_HOST_RSA_KEY_FILE, "", NULL);
1.177 markus 625: PRIV_END;
1.173 markus 626:
1.181 markus 627: if (options.hostbased_authentication == 1 &&
628: sensitive_data.keys[0] == NULL &&
1.173 markus 629: sensitive_data.keys[1] == NULL &&
630: sensitive_data.keys[2] == NULL) {
631: sensitive_data.keys[1] = key_load_public(
632: _PATH_HOST_DSA_KEY_FILE, NULL);
633: sensitive_data.keys[2] = key_load_public(
634: _PATH_HOST_RSA_KEY_FILE, NULL);
635: sensitive_data.external_keysign = 1;
636: }
1.31 markus 637: }
1.33 markus 638: /*
639: * Get rid of any extra privileges that we may have. We will no
640: * longer need them. Also, extra privileges could make it very hard
641: * to read identity files and other non-world-readable files from the
642: * user's home directory if it happens to be on a NFS volume where
643: * root is mapped to nobody.
644: */
1.177 markus 645: seteuid(original_real_uid);
646: setuid(original_real_uid);
1.31 markus 647:
1.33 markus 648: /*
649: * Now that we are back to our own permissions, create ~/.ssh
650: * directory if it doesn\'t already exist.
651: */
1.138 jakob 652: snprintf(buf, sizeof buf, "%.100s%s%.100s", pw->pw_dir, strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR);
1.31 markus 653: if (stat(buf, &st) < 0)
1.57 djm 654: if (mkdir(buf, 0700) < 0)
1.31 markus 655: error("Could not create directory '%.200s'.", buf);
656:
1.104 markus 657: /* load options.identity_files */
658: load_public_identity_files();
659:
660: /* Expand ~ in known host file names. */
661: /* XXX mem-leaks: */
1.72 markus 662: options.system_hostfile =
663: tilde_expand_filename(options.system_hostfile, original_real_uid);
664: options.user_hostfile =
665: tilde_expand_filename(options.user_hostfile, original_real_uid);
666: options.system_hostfile2 =
667: tilde_expand_filename(options.system_hostfile2, original_real_uid);
668: options.user_hostfile2 =
669: tilde_expand_filename(options.user_hostfile2, original_real_uid);
1.149 markus 670:
671: signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */
1.31 markus 672:
673: /* Log into the remote system. This never returns if the login fails. */
1.173 markus 674: ssh_login(&sensitive_data, host, (struct sockaddr *)&hostaddr, pw);
1.31 markus 675:
1.112 markus 676: /* We no longer need the private host keys. Clear them now. */
677: if (sensitive_data.nkeys != 0) {
678: for (i = 0; i < sensitive_data.nkeys; i++) {
679: if (sensitive_data.keys[i] != NULL) {
680: /* Destroys contents safely */
681: debug3("clear hostkey %d", i);
682: key_free(sensitive_data.keys[i]);
683: sensitive_data.keys[i] = NULL;
684: }
685: }
686: xfree(sensitive_data.keys);
1.134 markus 687: }
688: for (i = 0; i < options.num_identity_files; i++) {
689: if (options.identity_files[i]) {
690: xfree(options.identity_files[i]);
691: options.identity_files[i] = NULL;
692: }
693: if (options.identity_keys[i]) {
694: key_free(options.identity_keys[i]);
695: options.identity_keys[i] = NULL;
696: }
1.112 markus 697: }
1.31 markus 698:
1.45 markus 699: exit_status = compat20 ? ssh_session2() : ssh_session();
700: packet_close();
701: return exit_status;
702: }
703:
1.126 itojun 704: static void
1.150 stevesk 705: x11_get_proto(char **_proto, char **_data)
1.50 markus 706: {
707: char line[512];
1.150 stevesk 708: static char proto[512], data[512];
1.50 markus 709: FILE *f;
710: int got_data = 0, i;
1.159 stevesk 711: char *display;
1.182 stevesk 712: struct stat st;
1.50 markus 713:
1.150 stevesk 714: *_proto = proto;
715: *_data = data;
716: proto[0] = data[0] = '\0';
1.182 stevesk 717: if (!options.xauth_location ||
718: (stat(options.xauth_location, &st) == -1)) {
719: debug("No xauth program.");
720: } else {
721: if ((display = getenv("DISPLAY")) == NULL) {
722: debug("x11_get_proto: DISPLAY not set");
723: return;
724: }
1.55 markus 725: /* Try to get Xauthority information for the display. */
1.159 stevesk 726: if (strncmp(display, "localhost:", 10) == 0)
727: /*
728: * Handle FamilyLocal case where $DISPLAY does
729: * not match an authorization entry. For this we
730: * just try "xauth list unix:displaynum.screennum".
731: * XXX: "localhost" match to determine FamilyLocal
732: * is not perfect.
733: */
1.171 stevesk 734: snprintf(line, sizeof line, "%s list unix:%s 2>"
1.159 stevesk 735: _PATH_DEVNULL, options.xauth_location, display+10);
736: else
1.171 stevesk 737: snprintf(line, sizeof line, "%s list %.200s 2>"
1.159 stevesk 738: _PATH_DEVNULL, options.xauth_location, display);
1.182 stevesk 739: debug2("x11_get_proto: %s", line);
1.55 markus 740: f = popen(line, "r");
741: if (f && fgets(line, sizeof(line), f) &&
1.150 stevesk 742: sscanf(line, "%*s %511s %511s", proto, data) == 2)
1.55 markus 743: got_data = 1;
744: if (f)
745: pclose(f);
746: }
1.50 markus 747: /*
748: * If we didn't get authentication data, just make up some
749: * data. The forwarding code will check the validity of the
750: * response anyway, and substitute this data. The X11
751: * server, however, will ignore this fake data and use
752: * whatever authentication mechanisms it was using otherwise
753: * for the local connection.
754: */
755: if (!got_data) {
756: u_int32_t rand = 0;
757:
1.182 stevesk 758: log("Warning: No xauth data; using fake authentication data for X11 forwarding.");
1.150 stevesk 759: strlcpy(proto, "MIT-MAGIC-COOKIE-1", sizeof proto);
1.50 markus 760: for (i = 0; i < 16; i++) {
761: if (i % 4 == 0)
762: rand = arc4random();
1.150 stevesk 763: snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", rand & 0xff);
1.50 markus 764: rand >>= 8;
765: }
766: }
767: }
768:
1.126 itojun 769: static void
1.70 markus 770: ssh_init_forwarding(void)
771: {
1.86 markus 772: int success = 0;
1.70 markus 773: int i;
1.86 markus 774:
1.70 markus 775: /* Initiate local TCP/IP port forwardings. */
776: for (i = 0; i < options.num_local_forwards; i++) {
777: debug("Connections to local port %d forwarded to remote address %.200s:%d",
778: options.local_forwards[i].port,
779: options.local_forwards[i].host,
780: options.local_forwards[i].host_port);
1.158 markus 781: success += channel_setup_local_fwd_listener(
1.70 markus 782: options.local_forwards[i].port,
783: options.local_forwards[i].host,
784: options.local_forwards[i].host_port,
785: options.gateway_ports);
786: }
1.86 markus 787: if (i > 0 && success == 0)
788: error("Could not request local forwarding.");
1.70 markus 789:
790: /* Initiate remote TCP/IP port forwardings. */
791: for (i = 0; i < options.num_remote_forwards; i++) {
792: debug("Connections to remote port %d forwarded to local address %.200s:%d",
793: options.remote_forwards[i].port,
794: options.remote_forwards[i].host,
795: options.remote_forwards[i].host_port);
796: channel_request_remote_forwarding(
797: options.remote_forwards[i].port,
798: options.remote_forwards[i].host,
799: options.remote_forwards[i].host_port);
800: }
801: }
802:
1.126 itojun 803: static void
1.70 markus 804: check_agent_present(void)
805: {
806: if (options.forward_agent) {
807: /* Clear agent forwarding if we don\'t have an agent. */
808: int authfd = ssh_get_authentication_socket();
809: if (authfd < 0)
810: options.forward_agent = 0;
811: else
812: ssh_close_authentication_socket(authfd);
813: }
814: }
815:
1.126 itojun 816: static int
1.45 markus 817: ssh_session(void)
818: {
819: int type;
820: int interactive = 0;
821: int have_tty = 0;
822: struct winsize ws;
823: char *cp;
824:
1.31 markus 825: /* Enable compression if requested. */
826: if (options.compression) {
827: debug("Requesting compression at level %d.", options.compression_level);
828:
829: if (options.compression_level < 1 || options.compression_level > 9)
830: fatal("Compression level must be from 1 (fast) to 9 (slow, best).");
831:
832: /* Send the request. */
833: packet_start(SSH_CMSG_REQUEST_COMPRESSION);
834: packet_put_int(options.compression_level);
835: packet_send();
836: packet_write_wait();
1.156 markus 837: type = packet_read();
1.31 markus 838: if (type == SSH_SMSG_SUCCESS)
839: packet_start_compression(options.compression_level);
840: else if (type == SSH_SMSG_FAILURE)
841: log("Warning: Remote host refused compression.");
842: else
843: packet_disconnect("Protocol error waiting for compression response.");
844: }
845: /* Allocate a pseudo tty if appropriate. */
846: if (tty_flag) {
847: debug("Requesting pty.");
848:
849: /* Start the packet. */
850: packet_start(SSH_CMSG_REQUEST_PTY);
851:
852: /* Store TERM in the packet. There is no limit on the
853: length of the string. */
854: cp = getenv("TERM");
855: if (!cp)
856: cp = "";
1.124 markus 857: packet_put_cstring(cp);
1.31 markus 858:
859: /* Store window size in the packet. */
860: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
861: memset(&ws, 0, sizeof(ws));
862: packet_put_int(ws.ws_row);
863: packet_put_int(ws.ws_col);
864: packet_put_int(ws.ws_xpixel);
865: packet_put_int(ws.ws_ypixel);
866:
867: /* Store tty modes in the packet. */
1.115 stevesk 868: tty_make_modes(fileno(stdin), NULL);
1.31 markus 869:
870: /* Send the packet, and wait for it to leave. */
871: packet_send();
872: packet_write_wait();
873:
874: /* Read response from the server. */
1.156 markus 875: type = packet_read();
1.43 markus 876: if (type == SSH_SMSG_SUCCESS) {
1.31 markus 877: interactive = 1;
1.45 markus 878: have_tty = 1;
1.43 markus 879: } else if (type == SSH_SMSG_FAILURE)
1.31 markus 880: log("Warning: Remote host failed or refused to allocate a pseudo tty.");
881: else
882: packet_disconnect("Protocol error waiting for pty request response.");
883: }
884: /* Request X11 forwarding if enabled and DISPLAY is set. */
885: if (options.forward_x11 && getenv("DISPLAY") != NULL) {
1.150 stevesk 886: char *proto, *data;
1.50 markus 887: /* Get reasonable local authentication information. */
1.150 stevesk 888: x11_get_proto(&proto, &data);
1.50 markus 889: /* Request forwarding with authentication spoofing. */
1.31 markus 890: debug("Requesting X11 forwarding with authentication spoofing.");
1.50 markus 891: x11_request_forwarding_with_spoofing(0, proto, data);
1.31 markus 892:
893: /* Read response from the server. */
1.156 markus 894: type = packet_read();
1.31 markus 895: if (type == SSH_SMSG_SUCCESS) {
896: interactive = 1;
1.50 markus 897: } else if (type == SSH_SMSG_FAILURE) {
1.31 markus 898: log("Warning: Remote host denied X11 forwarding.");
1.50 markus 899: } else {
1.31 markus 900: packet_disconnect("Protocol error waiting for X11 forwarding");
1.50 markus 901: }
1.31 markus 902: }
903: /* Tell the packet module whether this is an interactive session. */
1.80 markus 904: packet_set_interactive(interactive);
1.31 markus 905:
906: /* Request authentication agent forwarding if appropriate. */
1.70 markus 907: check_agent_present();
908:
1.31 markus 909: if (options.forward_agent) {
910: debug("Requesting authentication agent forwarding.");
911: auth_request_forwarding();
912:
913: /* Read response from the server. */
1.156 markus 914: type = packet_read();
1.155 markus 915: packet_check_eom();
1.31 markus 916: if (type != SSH_SMSG_SUCCESS)
917: log("Warning: Remote host denied authentication agent forwarding.");
918: }
919:
1.70 markus 920: /* Initiate port forwardings. */
921: ssh_init_forwarding();
1.34 markus 922:
923: /* If requested, let ssh continue in the background. */
1.48 markus 924: if (fork_after_authentication_flag)
1.34 markus 925: if (daemon(1, 1) < 0)
926: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 927:
1.33 markus 928: /*
929: * If a command was specified on the command line, execute the
930: * command now. Otherwise request the server to start a shell.
931: */
1.31 markus 932: if (buffer_len(&command) > 0) {
933: int len = buffer_len(&command);
934: if (len > 900)
935: len = 900;
1.152 stevesk 936: debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
1.31 markus 937: packet_start(SSH_CMSG_EXEC_CMD);
938: packet_put_string(buffer_ptr(&command), buffer_len(&command));
939: packet_send();
940: packet_write_wait();
941: } else {
942: debug("Requesting shell.");
943: packet_start(SSH_CMSG_EXEC_SHELL);
944: packet_send();
945: packet_write_wait();
946: }
947:
948: /* Enter the interactive session. */
1.119 stevesk 949: return client_loop(have_tty, tty_flag ?
950: options.escape_char : SSH_ESCAPECHAR_NONE, 0);
1.45 markus 951: }
952:
1.126 itojun 953: static void
1.157 markus 954: client_subsystem_reply(int type, u_int32_t seq, void *ctxt)
1.89 markus 955: {
956: int id, len;
957:
958: id = packet_get_int();
959: len = buffer_len(&command);
1.100 markus 960: if (len > 900)
961: len = 900;
1.155 markus 962: packet_check_eom();
1.89 markus 963: if (type == SSH2_MSG_CHANNEL_FAILURE)
964: fatal("Request for subsystem '%.*s' failed on channel %d",
1.152 stevesk 965: len, (u_char *)buffer_ptr(&command), id);
1.170 markus 966: }
967:
968: void
969: client_global_request_reply(int type, u_int32_t seq, void *ctxt)
970: {
971: int i;
972:
973: i = client_global_request_id++;
974: if (i >= options.num_remote_forwards) {
975: debug("client_global_request_reply: too many replies %d > %d",
976: i, options.num_remote_forwards);
977: return;
978: }
979: debug("remote forward %s for: listen %d, connect %s:%d",
980: type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure",
981: options.remote_forwards[i].port,
982: options.remote_forwards[i].host,
983: options.remote_forwards[i].host_port);
984: if (type == SSH2_MSG_REQUEST_FAILURE)
985: log("Warning: remote port forwarding failed for listen port %d",
986: options.remote_forwards[i].port);
1.89 markus 987: }
988:
1.143 markus 989: /* request pty/x11/agent/tcpfwd/shell for channel */
1.126 itojun 990: static void
1.143 markus 991: ssh_session2_setup(int id, void *arg)
1.45 markus 992: {
993: int len;
1.80 markus 994: int interactive = 0;
1.115 stevesk 995: struct termios tio;
1.80 markus 996:
1.143 markus 997: debug("ssh_session2_setup: id %d", id);
1.31 markus 998:
1.45 markus 999: if (tty_flag) {
1000: struct winsize ws;
1001: char *cp;
1002: cp = getenv("TERM");
1003: if (!cp)
1004: cp = "";
1005: /* Store window size in the packet. */
1006: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
1007: memset(&ws, 0, sizeof(ws));
1008:
1009: channel_request_start(id, "pty-req", 0);
1010: packet_put_cstring(cp);
1011: packet_put_int(ws.ws_col);
1012: packet_put_int(ws.ws_row);
1013: packet_put_int(ws.ws_xpixel);
1014: packet_put_int(ws.ws_ypixel);
1.115 stevesk 1015: tio = get_saved_tio();
1016: tty_make_modes(/*ignored*/ 0, &tio);
1.45 markus 1017: packet_send();
1.80 markus 1018: interactive = 1;
1.45 markus 1019: /* XXX wait for reply */
1020: }
1.50 markus 1021: if (options.forward_x11 &&
1022: getenv("DISPLAY") != NULL) {
1.150 stevesk 1023: char *proto, *data;
1.50 markus 1024: /* Get reasonable local authentication information. */
1.150 stevesk 1025: x11_get_proto(&proto, &data);
1.50 markus 1026: /* Request forwarding with authentication spoofing. */
1027: debug("Requesting X11 forwarding with authentication spoofing.");
1028: x11_request_forwarding_with_spoofing(id, proto, data);
1.80 markus 1029: interactive = 1;
1.50 markus 1030: /* XXX wait for reply */
1031: }
1032:
1.70 markus 1033: check_agent_present();
1034: if (options.forward_agent) {
1035: debug("Requesting authentication agent forwarding.");
1036: channel_request_start(id, "auth-agent-req@openssh.com", 0);
1037: packet_send();
1038: }
1039:
1.45 markus 1040: len = buffer_len(&command);
1041: if (len > 0) {
1042: if (len > 900)
1043: len = 900;
1.85 djm 1044: if (subsystem_flag) {
1.152 stevesk 1045: debug("Sending subsystem: %.*s", len, (u_char *)buffer_ptr(&command));
1.89 markus 1046: channel_request_start(id, "subsystem", /*want reply*/ 1);
1047: /* register callback for reply */
1.172 deraadt 1048: /* XXX we assume that client_loop has already been called */
1.89 markus 1049: dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &client_subsystem_reply);
1050: dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &client_subsystem_reply);
1.85 djm 1051: } else {
1.152 stevesk 1052: debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
1.85 djm 1053: channel_request_start(id, "exec", 0);
1054: }
1.100 markus 1055: packet_put_string(buffer_ptr(&command), buffer_len(&command));
1.45 markus 1056: packet_send();
1057: } else {
1.161 markus 1058: channel_request_start(id, "shell", 0);
1059: packet_send();
1.45 markus 1060: }
1.90 markus 1061:
1.80 markus 1062: packet_set_interactive(interactive);
1.45 markus 1063: }
1064:
1.143 markus 1065: /* open new channel for a session */
1.126 itojun 1066: static int
1.143 markus 1067: ssh_session2_open(void)
1.45 markus 1068: {
1.118 markus 1069: Channel *c;
1070: int window, packetmax, in, out, err;
1.60 markus 1071:
1.62 markus 1072: if (stdin_null_flag) {
1.93 itojun 1073: in = open(_PATH_DEVNULL, O_RDONLY);
1.62 markus 1074: } else {
1075: in = dup(STDIN_FILENO);
1076: }
1.60 markus 1077: out = dup(STDOUT_FILENO);
1078: err = dup(STDERR_FILENO);
1.45 markus 1079:
1080: if (in < 0 || out < 0 || err < 0)
1.62 markus 1081: fatal("dup() in/out/err failed");
1.45 markus 1082:
1.69 markus 1083: /* enable nonblocking unless tty */
1084: if (!isatty(in))
1085: set_nonblock(in);
1086: if (!isatty(out))
1087: set_nonblock(out);
1088: if (!isatty(err))
1089: set_nonblock(err);
1090:
1.65 markus 1091: window = CHAN_SES_WINDOW_DEFAULT;
1092: packetmax = CHAN_SES_PACKET_DEFAULT;
1.164 markus 1093: if (tty_flag) {
1094: window >>= 1;
1095: packetmax >>= 1;
1.45 markus 1096: }
1.118 markus 1097: c = channel_new(
1.45 markus 1098: "session", SSH_CHANNEL_OPENING, in, out, err,
1.65 markus 1099: window, packetmax, CHAN_EXTENDED_WRITE,
1.69 markus 1100: xstrdup("client-session"), /*nonblock*/0);
1.45 markus 1101:
1.143 markus 1102: debug3("ssh_session2_open: channel_new: %d", c->self);
1.106 markus 1103:
1.122 markus 1104: channel_send_open(c->self);
1.143 markus 1105: if (!no_shell_flag)
1.160 markus 1106: channel_register_confirm(c->self, ssh_session2_setup);
1.106 markus 1107:
1.118 markus 1108: return c->self;
1.106 markus 1109: }
1110:
1.126 itojun 1111: static int
1.106 markus 1112: ssh_session2(void)
1113: {
1.143 markus 1114: int id = -1;
1.106 markus 1115:
1116: /* XXX should be pre-session */
1117: ssh_init_forwarding();
1118:
1.143 markus 1119: if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN))
1120: id = ssh_session2_open();
1.106 markus 1121:
1122: /* If requested, let ssh continue in the background. */
1123: if (fork_after_authentication_flag)
1124: if (daemon(1, 1) < 0)
1125: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 1126:
1.119 stevesk 1127: return client_loop(tty_flag, tty_flag ?
1128: options.escape_char : SSH_ESCAPECHAR_NONE, id);
1.72 markus 1129: }
1130:
1.126 itojun 1131: static void
1.104 markus 1132: load_public_identity_files(void)
1133: {
1134: char *filename;
1.167 markus 1135: int i = 0;
1.104 markus 1136: Key *public;
1.167 markus 1137: #ifdef SMARTCARD
1138: Key **keys;
1.104 markus 1139:
1.133 markus 1140: if (options.smartcard_device != NULL &&
1.167 markus 1141: options.num_identity_files < SSH_MAX_IDENTITY_FILES &&
1142: (keys = sc_get_keys(options.smartcard_device, NULL)) != NULL ) {
1143: int count = 0;
1144: for (i = 0; keys[i] != NULL; i++) {
1145: count++;
1146: memmove(&options.identity_files[1], &options.identity_files[0],
1147: sizeof(char *) * (SSH_MAX_IDENTITY_FILES - 1));
1148: memmove(&options.identity_keys[1], &options.identity_keys[0],
1149: sizeof(Key *) * (SSH_MAX_IDENTITY_FILES - 1));
1150: options.num_identity_files++;
1151: options.identity_keys[0] = keys[i];
1152: options.identity_files[0] = xstrdup("smartcard key");;
1153: }
1.168 markus 1154: if (options.num_identity_files > SSH_MAX_IDENTITY_FILES)
1155: options.num_identity_files = SSH_MAX_IDENTITY_FILES;
1.167 markus 1156: i = count;
1157: xfree(keys);
1.127 markus 1158: }
1.136 jakob 1159: #endif /* SMARTCARD */
1.131 millert 1160: for (; i < options.num_identity_files; i++) {
1161: filename = tilde_expand_filename(options.identity_files[i],
1162: original_real_uid);
1163: public = key_load_public(filename, NULL);
1164: debug("identity file %s type %d", filename,
1165: public ? public->type : -1);
1166: xfree(options.identity_files[i]);
1167: options.identity_files[i] = filename;
1168: options.identity_keys[i] = public;
1169: }
1.1 deraadt 1170: }
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