Annotation of src/usr.bin/ssh/ssh.c, Revision 1.186.2.2
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"
1.186.2.2! brad 43: RCSID("$OpenBSD: ssh.c,v 1.201 2003/09/01 18:15:50 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: {
1.76 markus 145: fprintf(stderr, "Usage: %s [options] host [command]\n", __progname);
1.31 markus 146: fprintf(stderr, "Options:\n");
147: fprintf(stderr, " -l user Log in using this user name.\n");
1.93 itojun 148: fprintf(stderr, " -n Redirect input from " _PATH_DEVNULL ".\n");
1.139 markus 149: fprintf(stderr, " -F config Config file (default: ~/%s).\n",
150: _PATH_SSH_USER_CONFFILE);
1.53 markus 151: fprintf(stderr, " -A Enable authentication agent forwarding.\n");
1.120 markus 152: fprintf(stderr, " -a Disable authentication agent forwarding (default).\n");
1.88 stevesk 153: fprintf(stderr, " -X Enable X11 connection forwarding.\n");
1.120 markus 154: fprintf(stderr, " -x Disable X11 connection forwarding (default).\n");
1.99 deraadt 155: fprintf(stderr, " -i file Identity for public key authentication "
156: "(default: ~/.ssh/identity)\n");
1.135 jakob 157: #ifdef SMARTCARD
158: fprintf(stderr, " -I reader Set smartcard reader.\n");
1.137 jakob 159: #endif
1.31 markus 160: fprintf(stderr, " -t Tty; allocate a tty even if command is given.\n");
1.45 markus 161: fprintf(stderr, " -T Do not allocate a tty.\n");
1.31 markus 162: fprintf(stderr, " -v Verbose; display verbose debugging messages.\n");
1.66 markus 163: fprintf(stderr, " Multiple -v increases verbosity.\n");
1.31 markus 164: fprintf(stderr, " -V Display version number only.\n");
165: fprintf(stderr, " -q Quiet; don't display any warning messages.\n");
166: fprintf(stderr, " -f Fork into background after authentication.\n");
167: fprintf(stderr, " -e char Set escape character; ``none'' = disable (default: ~).\n");
168:
1.120 markus 169: fprintf(stderr, " -c cipher Select encryption algorithm\n");
1.102 stevesk 170: fprintf(stderr, " -m macs Specify MAC algorithms for protocol version 2.\n");
1.31 markus 171: fprintf(stderr, " -p port Connect to this port. Server must be on the same port.\n");
172: fprintf(stderr, " -L listen-port:host:port Forward local port to remote address\n");
173: fprintf(stderr, " -R listen-port:host:port Forward remote port to local address\n");
1.76 markus 174: fprintf(stderr, " These cause %s to listen for connections on a port, and\n", __progname);
1.31 markus 175: fprintf(stderr, " forward them to the other side by connecting to host:port.\n");
1.140 stevesk 176: fprintf(stderr, " -D port Enable dynamic application-level port forwarding.\n");
1.31 markus 177: fprintf(stderr, " -C Enable compression.\n");
1.45 markus 178: fprintf(stderr, " -N Do not execute a shell or command.\n");
1.31 markus 179: fprintf(stderr, " -g Allow remote hosts to connect to forwarded ports.\n");
1.92 jakob 180: fprintf(stderr, " -1 Force protocol version 1.\n");
181: fprintf(stderr, " -2 Force protocol version 2.\n");
1.37 markus 182: fprintf(stderr, " -4 Use IPv4 only.\n");
183: fprintf(stderr, " -6 Use IPv6 only.\n");
1.31 markus 184: fprintf(stderr, " -o 'option' Process the option as if it was read from a configuration file.\n");
1.85 djm 185: fprintf(stderr, " -s Invoke command (mandatory) as SSH2 subsystem.\n");
1.120 markus 186: fprintf(stderr, " -b addr Local IP address.\n");
1.31 markus 187: exit(1);
1.1 deraadt 188: }
189:
1.126 itojun 190: static int ssh_session(void);
191: static int ssh_session2(void);
192: static void load_public_identity_files(void);
1.45 markus 193:
1.32 deraadt 194: /*
195: * Main program for the ssh client.
196: */
1.2 provos 197: int
198: main(int ac, char **av)
1.1 deraadt 199: {
1.178 markus 200: int i, opt, exit_status;
1.35 markus 201: u_short fwd_port, fwd_host_port;
1.141 stevesk 202: char sfwd_port[6], sfwd_host_port[6];
1.128 fgsch 203: char *p, *cp, buf[256];
1.31 markus 204: struct stat st;
1.98 markus 205: struct passwd *pw;
1.45 markus 206: int dummy;
1.144 stevesk 207: extern int optind, optreset;
208: extern char *optarg;
1.31 markus 209:
1.33 markus 210: /*
211: * Save the original real uid. It will be needed later (uid-swapping
212: * may clobber the real uid).
213: */
1.31 markus 214: original_real_uid = getuid();
215: original_effective_uid = geteuid();
216:
1.184 stevesk 217: /*
218: * Use uid-swapping to give up root privileges for the duration of
219: * option processing. We will re-instantiate the rights when we are
220: * ready to create the privileged port, and will permanently drop
221: * them when the port has been created (actually, when the connection
222: * has been made, as we may need to create the port several times).
223: */
224: PRIV_END;
225:
1.31 markus 226: /* If we are installed setuid root be careful to not drop core. */
227: if (original_real_uid != original_effective_uid) {
228: struct rlimit rlim;
229: rlim.rlim_cur = rlim.rlim_max = 0;
230: if (setrlimit(RLIMIT_CORE, &rlim) < 0)
231: fatal("setrlimit failed: %.100s", strerror(errno));
1.1 deraadt 232: }
1.107 markus 233: /* Get user data. */
234: pw = getpwuid(original_real_uid);
235: if (!pw) {
1.186.2.2! brad 236: logit("You don't exist, go away!");
1.107 markus 237: exit(1);
238: }
239: /* Take a copy of the returned structure. */
240: pw = pwcopy(pw);
1.31 markus 241:
1.33 markus 242: /*
243: * Set our umask to something reasonable, as some files are created
244: * with the default umask. This will make them world-readable but
245: * writable only by the owner, which is ok for all files for which we
246: * don't set the modes explicitly.
247: */
1.31 markus 248: umask(022);
249:
250: /* Initialize option structure to indicate that no values have been set. */
251: initialize_options(&options);
252:
253: /* Parse command-line arguments. */
254: host = NULL;
255:
1.128 fgsch 256: again:
257: while ((opt = getopt(ac, av,
1.139 markus 258: "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:NPR:TVX")) != -1) {
1.31 markus 259: switch (opt) {
1.91 jakob 260: case '1':
261: options.protocol = SSH_PROTO_1;
262: break;
1.47 markus 263: case '2':
264: options.protocol = SSH_PROTO_2;
265: break;
1.37 markus 266: case '4':
1.186.2.2! brad 267: options.address_family = AF_INET;
1.37 markus 268: break;
269: case '6':
1.186.2.2! brad 270: options.address_family = AF_INET6;
1.37 markus 271: break;
1.31 markus 272: case 'n':
273: stdin_null_flag = 1;
274: break;
275: case 'f':
276: fork_after_authentication_flag = 1;
277: stdin_null_flag = 1;
278: break;
279: case 'x':
280: options.forward_x11 = 0;
281: break;
282: case 'X':
283: options.forward_x11 = 1;
284: break;
285: case 'g':
286: options.gateway_ports = 1;
287: break;
1.183 stevesk 288: case 'P': /* deprecated */
1.31 markus 289: options.use_privileged_port = 0;
290: break;
291: case 'a':
292: options.forward_agent = 0;
1.53 markus 293: break;
294: case 'A':
295: options.forward_agent = 1;
1.31 markus 296: break;
297: case 'k':
1.186.2.2! brad 298: /* ignored for backward compatibility */
1.31 markus 299: break;
300: case 'i':
301: if (stat(optarg, &st) < 0) {
1.128 fgsch 302: fprintf(stderr, "Warning: Identity file %s "
303: "does not exist.\n", optarg);
1.31 markus 304: break;
305: }
1.128 fgsch 306: if (options.num_identity_files >=
307: SSH_MAX_IDENTITY_FILES)
308: fatal("Too many identity files specified "
309: "(max %d)", SSH_MAX_IDENTITY_FILES);
310: options.identity_files[options.num_identity_files++] =
311: xstrdup(optarg);
1.31 markus 312: break;
1.127 markus 313: case 'I':
314: #ifdef SMARTCARD
1.133 markus 315: options.smartcard_device = xstrdup(optarg);
1.137 jakob 316: #else
1.127 markus 317: fprintf(stderr, "no support for smartcards.\n");
1.137 jakob 318: #endif
1.127 markus 319: break;
1.31 markus 320: case 't':
1.79 markus 321: if (tty_flag)
322: force_tty_flag = 1;
1.31 markus 323: tty_flag = 1;
324: break;
325: case 'v':
1.186.2.2! brad 326: if (debug_flag == 0) {
1.66 markus 327: debug_flag = 1;
328: options.log_level = SYSLOG_LEVEL_DEBUG1;
1.186.2.2! brad 329: } else {
! 330: if (options.log_level < SYSLOG_LEVEL_DEBUG3)
! 331: options.log_level++;
1.66 markus 332: break;
1.186.2.2! brad 333: }
1.66 markus 334: /* fallthrough */
1.31 markus 335: case 'V':
1.96 deraadt 336: fprintf(stderr,
1.186.2.2! brad 337: "%s, SSH protocols %d.%d/%d.%d, %s\n",
1.46 markus 338: SSH_VERSION,
339: PROTOCOL_MAJOR_1, PROTOCOL_MINOR_1,
1.96 deraadt 340: PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2,
1.186.2.2! brad 341: SSLeay_version(SSLEAY_VERSION));
1.31 markus 342: if (opt == 'V')
343: exit(0);
344: break;
345: case 'q':
346: options.log_level = SYSLOG_LEVEL_QUIET;
347: break;
348: case 'e':
349: if (optarg[0] == '^' && optarg[2] == 0 &&
1.128 fgsch 350: (u_char) optarg[1] >= 64 &&
351: (u_char) optarg[1] < 128)
1.78 markus 352: options.escape_char = (u_char) optarg[1] & 31;
1.31 markus 353: else if (strlen(optarg) == 1)
1.78 markus 354: options.escape_char = (u_char) optarg[0];
1.31 markus 355: else if (strcmp(optarg, "none") == 0)
1.119 stevesk 356: options.escape_char = SSH_ESCAPECHAR_NONE;
1.31 markus 357: else {
1.128 fgsch 358: fprintf(stderr, "Bad escape character '%s'.\n",
359: optarg);
1.31 markus 360: exit(1);
361: }
362: break;
363: case 'c':
1.49 markus 364: if (ciphers_valid(optarg)) {
365: /* SSH2 only */
366: options.ciphers = xstrdup(optarg);
1.51 markus 367: options.cipher = SSH_CIPHER_ILLEGAL;
1.49 markus 368: } else {
369: /* SSH1 only */
1.74 markus 370: options.cipher = cipher_number(optarg);
371: if (options.cipher == -1) {
1.128 fgsch 372: fprintf(stderr,
373: "Unknown cipher type '%s'\n",
374: optarg);
1.49 markus 375: exit(1);
376: }
1.128 fgsch 377: if (options.cipher == SSH_CIPHER_3DES)
1.74 markus 378: options.ciphers = "3des-cbc";
1.128 fgsch 379: else if (options.cipher == SSH_CIPHER_BLOWFISH)
1.74 markus 380: options.ciphers = "blowfish-cbc";
1.128 fgsch 381: else
1.74 markus 382: options.ciphers = (char *)-1;
1.95 markus 383: }
384: break;
385: case 'm':
386: if (mac_valid(optarg))
387: options.macs = xstrdup(optarg);
388: else {
1.128 fgsch 389: fprintf(stderr, "Unknown mac type '%s'\n",
390: optarg);
1.95 markus 391: exit(1);
1.31 markus 392: }
393: break;
394: case 'p':
1.113 stevesk 395: options.port = a2port(optarg);
396: if (options.port == 0) {
1.109 markus 397: fprintf(stderr, "Bad port '%s'\n", optarg);
398: exit(1);
399: }
1.31 markus 400: break;
401: case 'l':
402: options.user = optarg;
403: break;
1.141 stevesk 404:
405: case 'L':
1.31 markus 406: case 'R':
1.141 stevesk 407: if (sscanf(optarg, "%5[0-9]:%255[^:]:%5[0-9]",
408: sfwd_port, buf, sfwd_host_port) != 3 &&
409: sscanf(optarg, "%5[0-9]/%255[^/]/%5[0-9]",
410: sfwd_port, buf, sfwd_host_port) != 3) {
1.128 fgsch 411: fprintf(stderr,
1.141 stevesk 412: "Bad forwarding specification '%s'\n",
1.128 fgsch 413: optarg);
1.31 markus 414: usage();
415: /* NOTREACHED */
416: }
1.141 stevesk 417: if ((fwd_port = a2port(sfwd_port)) == 0 ||
1.165 markus 418: (fwd_host_port = a2port(sfwd_host_port)) == 0) {
1.128 fgsch 419: fprintf(stderr,
1.141 stevesk 420: "Bad forwarding port(s) '%s'\n", optarg);
421: exit(1);
1.31 markus 422: }
1.141 stevesk 423: if (opt == 'L')
424: add_local_forward(&options, fwd_port, buf,
425: fwd_host_port);
426: else if (opt == 'R')
427: add_remote_forward(&options, fwd_port, buf,
1.151 deraadt 428: fwd_host_port);
1.31 markus 429: break;
1.108 markus 430:
431: case 'D':
1.113 stevesk 432: fwd_port = a2port(optarg);
433: if (fwd_port == 0) {
1.128 fgsch 434: fprintf(stderr, "Bad dynamic port '%s'\n",
435: optarg);
1.109 markus 436: exit(1);
437: }
1.186.2.2! brad 438: add_local_forward(&options, fwd_port, "socks", 0);
1.108 markus 439: break;
440:
1.31 markus 441: case 'C':
442: options.compression = 1;
443: break;
1.45 markus 444: case 'N':
445: no_shell_flag = 1;
446: no_tty_flag = 1;
447: break;
448: case 'T':
449: no_tty_flag = 1;
450: break;
1.31 markus 451: case 'o':
452: dummy = 1;
1.128 fgsch 453: if (process_config_line(&options, host ? host : "",
454: optarg, "command-line", 0, &dummy) != 0)
1.31 markus 455: exit(1);
456: break;
1.85 djm 457: case 's':
458: subsystem_flag = 1;
1.117 markus 459: break;
460: case 'b':
461: options.bind_address = optarg;
1.85 djm 462: break;
1.139 markus 463: case 'F':
464: config = optarg;
465: break;
1.31 markus 466: default:
467: usage();
1.1 deraadt 468: }
1.31 markus 469: }
470:
1.128 fgsch 471: ac -= optind;
472: av += optind;
473:
474: if (ac > 0 && !host && **av != '-') {
1.186.2.1 margarid 475: if (strrchr(*av, '@')) {
1.128 fgsch 476: p = xstrdup(*av);
1.186.2.1 margarid 477: cp = strrchr(p, '@');
1.128 fgsch 478: if (cp == NULL || cp == p)
479: usage();
480: options.user = p;
481: *cp = '\0';
482: host = ++cp;
483: } else
484: host = *av;
1.186.2.1 margarid 485: if (ac > 1) {
486: optind = optreset = 1;
1.128 fgsch 487: goto again;
488: }
1.186.2.1 margarid 489: ac--, av++;
1.128 fgsch 490: }
491:
1.31 markus 492: /* Check that we got a host name. */
493: if (!host)
494: usage();
495:
1.54 markus 496: SSLeay_add_all_algorithms();
1.72 markus 497: ERR_load_crypto_strings();
1.31 markus 498:
499: /* Initialize the command to execute on remote host. */
500: buffer_init(&command);
1.1 deraadt 501:
1.33 markus 502: /*
503: * Save the command to execute on the remote host in a buffer. There
504: * is no limit on the length of the command, except by the maximum
505: * packet size. Also sets the tty flag if there is no command.
506: */
1.128 fgsch 507: if (!ac) {
1.31 markus 508: /* No command specified - execute shell on a tty. */
509: tty_flag = 1;
1.85 djm 510: if (subsystem_flag) {
1.128 fgsch 511: fprintf(stderr,
512: "You must specify a subsystem to invoke.\n");
1.85 djm 513: usage();
514: }
1.31 markus 515: } else {
1.128 fgsch 516: /* A command has been specified. Store it into the buffer. */
517: for (i = 0; i < ac; i++) {
518: if (i)
1.31 markus 519: buffer_append(&command, " ", 1);
520: buffer_append(&command, av[i], strlen(av[i]));
521: }
522: }
523:
524: /* Cannot fork to background if no command. */
1.63 markus 525: if (fork_after_authentication_flag && buffer_len(&command) == 0 && !no_shell_flag)
1.31 markus 526: fatal("Cannot fork into background without a command to execute.");
527:
528: /* Allocate a tty by default if no command specified. */
529: if (buffer_len(&command) == 0)
530: tty_flag = 1;
531:
1.180 deraadt 532: /* Force no tty */
1.75 markus 533: if (no_tty_flag)
534: tty_flag = 0;
1.31 markus 535: /* Do not allocate a tty if stdin is not a tty. */
1.79 markus 536: if (!isatty(fileno(stdin)) && !force_tty_flag) {
1.31 markus 537: if (tty_flag)
1.186.2.2! brad 538: logit("Pseudo-terminal will not be allocated because stdin is not a terminal.");
1.31 markus 539: tty_flag = 0;
540: }
1.45 markus 541:
1.101 markus 542: /*
543: * Initialize "log" output. Since we are the client all output
544: * actually goes to stderr.
545: */
1.111 markus 546: log_init(av[0], options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level,
547: SYSLOG_FACILITY_USER, 1);
1.31 markus 548:
1.139 markus 549: /*
550: * Read per-user configuration file. Ignore the system wide config
551: * file if the user specifies a config file on the command line.
552: */
553: if (config != NULL) {
1.142 stevesk 554: if (!read_config_file(config, host, &options))
555: fatal("Can't open user config file %.100s: "
556: "%.100s", config, strerror(errno));
1.139 markus 557: } else {
558: snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir,
559: _PATH_SSH_USER_CONFFILE);
1.145 markus 560: (void)read_config_file(buf, host, &options);
1.139 markus 561:
1.145 markus 562: /* Read systemwide configuration file after use config. */
1.142 stevesk 563: (void)read_config_file(_PATH_HOST_CONFIG_FILE, host, &options);
1.139 markus 564: }
1.31 markus 565:
566: /* Fill configuration defaults. */
567: fill_default_options(&options);
568:
1.186.2.2! brad 569: channel_set_af(options.address_family);
! 570:
1.31 markus 571: /* reinit */
1.101 markus 572: log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1);
1.31 markus 573:
574: if (options.user == NULL)
575: options.user = xstrdup(pw->pw_name);
576:
577: if (options.hostname != NULL)
578: host = options.hostname;
579:
1.186.2.2! brad 580: /* force lowercase for hostkey matching */
! 581: if (options.host_key_alias != NULL) {
! 582: for (p = options.host_key_alias; *p; p++)
! 583: if (isupper(*p))
! 584: *p = tolower(*p);
! 585: }
! 586:
1.186.2.1 margarid 587: if (options.proxy_command != NULL &&
588: strcmp(options.proxy_command, "none") == 0)
589: options.proxy_command = NULL;
590:
1.77 markus 591: /* Open a connection to the remote host. */
1.186.2.2! brad 592: if (ssh_connect(host, &hostaddr, options.port,
! 593: options.address_family, options.connection_attempts,
1.177 markus 594: original_effective_uid == 0 && options.use_privileged_port,
1.179 markus 595: options.proxy_command) != 0)
1.178 markus 596: exit(1);
1.31 markus 597:
1.33 markus 598: /*
599: * If we successfully made the connection, load the host private key
600: * in case we will need it later for combined rsa-rhosts
601: * authentication. This must be done before releasing extra
602: * privileges, because the file is only readable by root.
1.174 markus 603: * If we cannot access the private keys, load the public keys
604: * instead and try to execute the ssh-keysign helper instead.
1.33 markus 605: */
1.112 markus 606: sensitive_data.nkeys = 0;
607: sensitive_data.keys = NULL;
1.173 markus 608: sensitive_data.external_keysign = 0;
1.178 markus 609: if (options.rhosts_rsa_authentication ||
610: options.hostbased_authentication) {
1.112 markus 611: sensitive_data.nkeys = 3;
1.180 deraadt 612: sensitive_data.keys = xmalloc(sensitive_data.nkeys *
613: sizeof(Key));
1.177 markus 614:
615: PRIV_START;
1.112 markus 616: sensitive_data.keys[0] = key_load_private_type(KEY_RSA1,
1.105 markus 617: _PATH_HOST_KEY_FILE, "", NULL);
1.112 markus 618: sensitive_data.keys[1] = key_load_private_type(KEY_DSA,
619: _PATH_HOST_DSA_KEY_FILE, "", NULL);
620: sensitive_data.keys[2] = key_load_private_type(KEY_RSA,
621: _PATH_HOST_RSA_KEY_FILE, "", NULL);
1.177 markus 622: PRIV_END;
1.173 markus 623:
1.181 markus 624: if (options.hostbased_authentication == 1 &&
625: sensitive_data.keys[0] == NULL &&
1.173 markus 626: sensitive_data.keys[1] == NULL &&
627: sensitive_data.keys[2] == NULL) {
628: sensitive_data.keys[1] = key_load_public(
629: _PATH_HOST_DSA_KEY_FILE, NULL);
630: sensitive_data.keys[2] = key_load_public(
631: _PATH_HOST_RSA_KEY_FILE, NULL);
632: sensitive_data.external_keysign = 1;
633: }
1.31 markus 634: }
1.33 markus 635: /*
636: * Get rid of any extra privileges that we may have. We will no
637: * longer need them. Also, extra privileges could make it very hard
638: * to read identity files and other non-world-readable files from the
639: * user's home directory if it happens to be on a NFS volume where
640: * root is mapped to nobody.
641: */
1.177 markus 642: seteuid(original_real_uid);
643: setuid(original_real_uid);
1.31 markus 644:
1.33 markus 645: /*
646: * Now that we are back to our own permissions, create ~/.ssh
647: * directory if it doesn\'t already exist.
648: */
1.138 jakob 649: snprintf(buf, sizeof buf, "%.100s%s%.100s", pw->pw_dir, strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR);
1.31 markus 650: if (stat(buf, &st) < 0)
1.57 djm 651: if (mkdir(buf, 0700) < 0)
1.31 markus 652: error("Could not create directory '%.200s'.", buf);
653:
1.104 markus 654: /* load options.identity_files */
655: load_public_identity_files();
656:
657: /* Expand ~ in known host file names. */
658: /* XXX mem-leaks: */
1.72 markus 659: options.system_hostfile =
660: tilde_expand_filename(options.system_hostfile, original_real_uid);
661: options.user_hostfile =
662: tilde_expand_filename(options.user_hostfile, original_real_uid);
663: options.system_hostfile2 =
664: tilde_expand_filename(options.system_hostfile2, original_real_uid);
665: options.user_hostfile2 =
666: tilde_expand_filename(options.user_hostfile2, original_real_uid);
1.149 markus 667:
668: signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */
1.31 markus 669:
670: /* Log into the remote system. This never returns if the login fails. */
1.173 markus 671: ssh_login(&sensitive_data, host, (struct sockaddr *)&hostaddr, pw);
1.31 markus 672:
1.112 markus 673: /* We no longer need the private host keys. Clear them now. */
674: if (sensitive_data.nkeys != 0) {
675: for (i = 0; i < sensitive_data.nkeys; i++) {
676: if (sensitive_data.keys[i] != NULL) {
677: /* Destroys contents safely */
678: debug3("clear hostkey %d", i);
679: key_free(sensitive_data.keys[i]);
680: sensitive_data.keys[i] = NULL;
681: }
682: }
683: xfree(sensitive_data.keys);
1.134 markus 684: }
685: for (i = 0; i < options.num_identity_files; i++) {
686: if (options.identity_files[i]) {
687: xfree(options.identity_files[i]);
688: options.identity_files[i] = NULL;
689: }
690: if (options.identity_keys[i]) {
691: key_free(options.identity_keys[i]);
692: options.identity_keys[i] = NULL;
693: }
1.112 markus 694: }
1.31 markus 695:
1.45 markus 696: exit_status = compat20 ? ssh_session2() : ssh_session();
697: packet_close();
1.186 djm 698:
699: /*
700: * Send SIGHUP to proxy command if used. We don't wait() in
701: * case it hangs and instead rely on init to reap the child
702: */
703: if (proxy_command_pid > 1)
704: kill(proxy_command_pid, SIGHUP);
705:
1.45 markus 706: return exit_status;
707: }
708:
1.126 itojun 709: static void
1.150 stevesk 710: x11_get_proto(char **_proto, char **_data)
1.50 markus 711: {
712: char line[512];
1.150 stevesk 713: static char proto[512], data[512];
1.50 markus 714: FILE *f;
715: int got_data = 0, i;
1.159 stevesk 716: char *display;
1.182 stevesk 717: struct stat st;
1.50 markus 718:
1.150 stevesk 719: *_proto = proto;
720: *_data = data;
721: proto[0] = data[0] = '\0';
1.182 stevesk 722: if (!options.xauth_location ||
723: (stat(options.xauth_location, &st) == -1)) {
724: debug("No xauth program.");
725: } else {
726: if ((display = getenv("DISPLAY")) == NULL) {
727: debug("x11_get_proto: DISPLAY not set");
728: return;
729: }
1.55 markus 730: /* Try to get Xauthority information for the display. */
1.159 stevesk 731: if (strncmp(display, "localhost:", 10) == 0)
732: /*
733: * Handle FamilyLocal case where $DISPLAY does
734: * not match an authorization entry. For this we
735: * just try "xauth list unix:displaynum.screennum".
736: * XXX: "localhost" match to determine FamilyLocal
737: * is not perfect.
738: */
1.171 stevesk 739: snprintf(line, sizeof line, "%s list unix:%s 2>"
1.159 stevesk 740: _PATH_DEVNULL, options.xauth_location, display+10);
741: else
1.171 stevesk 742: snprintf(line, sizeof line, "%s list %.200s 2>"
1.159 stevesk 743: _PATH_DEVNULL, options.xauth_location, display);
1.182 stevesk 744: debug2("x11_get_proto: %s", line);
1.55 markus 745: f = popen(line, "r");
746: if (f && fgets(line, sizeof(line), f) &&
1.150 stevesk 747: sscanf(line, "%*s %511s %511s", proto, data) == 2)
1.55 markus 748: got_data = 1;
749: if (f)
750: pclose(f);
751: }
1.50 markus 752: /*
753: * If we didn't get authentication data, just make up some
754: * data. The forwarding code will check the validity of the
755: * response anyway, and substitute this data. The X11
756: * server, however, will ignore this fake data and use
757: * whatever authentication mechanisms it was using otherwise
758: * for the local connection.
759: */
760: if (!got_data) {
761: u_int32_t rand = 0;
762:
1.186.2.2! brad 763: logit("Warning: No xauth data; using fake authentication data for X11 forwarding.");
1.150 stevesk 764: strlcpy(proto, "MIT-MAGIC-COOKIE-1", sizeof proto);
1.50 markus 765: for (i = 0; i < 16; i++) {
766: if (i % 4 == 0)
767: rand = arc4random();
1.150 stevesk 768: snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", rand & 0xff);
1.50 markus 769: rand >>= 8;
770: }
771: }
772: }
773:
1.126 itojun 774: static void
1.70 markus 775: ssh_init_forwarding(void)
776: {
1.86 markus 777: int success = 0;
1.70 markus 778: int i;
1.86 markus 779:
1.70 markus 780: /* Initiate local TCP/IP port forwardings. */
781: for (i = 0; i < options.num_local_forwards; i++) {
782: debug("Connections to local port %d forwarded to remote address %.200s:%d",
783: options.local_forwards[i].port,
784: options.local_forwards[i].host,
785: options.local_forwards[i].host_port);
1.158 markus 786: success += channel_setup_local_fwd_listener(
1.70 markus 787: options.local_forwards[i].port,
788: options.local_forwards[i].host,
789: options.local_forwards[i].host_port,
790: options.gateway_ports);
791: }
1.86 markus 792: if (i > 0 && success == 0)
793: error("Could not request local forwarding.");
1.70 markus 794:
795: /* Initiate remote TCP/IP port forwardings. */
796: for (i = 0; i < options.num_remote_forwards; i++) {
797: debug("Connections to remote port %d forwarded to local address %.200s:%d",
798: options.remote_forwards[i].port,
799: options.remote_forwards[i].host,
800: options.remote_forwards[i].host_port);
801: channel_request_remote_forwarding(
802: options.remote_forwards[i].port,
803: options.remote_forwards[i].host,
804: options.remote_forwards[i].host_port);
805: }
806: }
807:
1.126 itojun 808: static void
1.70 markus 809: check_agent_present(void)
810: {
811: if (options.forward_agent) {
812: /* Clear agent forwarding if we don\'t have an agent. */
1.185 stevesk 813: if (!ssh_agent_present())
1.70 markus 814: options.forward_agent = 0;
815: }
816: }
817:
1.126 itojun 818: static int
1.45 markus 819: ssh_session(void)
820: {
821: int type;
822: int interactive = 0;
823: int have_tty = 0;
824: struct winsize ws;
825: char *cp;
826:
1.31 markus 827: /* Enable compression if requested. */
828: if (options.compression) {
829: debug("Requesting compression at level %d.", options.compression_level);
830:
831: if (options.compression_level < 1 || options.compression_level > 9)
832: fatal("Compression level must be from 1 (fast) to 9 (slow, best).");
833:
834: /* Send the request. */
835: packet_start(SSH_CMSG_REQUEST_COMPRESSION);
836: packet_put_int(options.compression_level);
837: packet_send();
838: packet_write_wait();
1.156 markus 839: type = packet_read();
1.31 markus 840: if (type == SSH_SMSG_SUCCESS)
841: packet_start_compression(options.compression_level);
842: else if (type == SSH_SMSG_FAILURE)
1.186.2.2! brad 843: logit("Warning: Remote host refused compression.");
1.31 markus 844: else
845: packet_disconnect("Protocol error waiting for compression response.");
846: }
847: /* Allocate a pseudo tty if appropriate. */
848: if (tty_flag) {
849: debug("Requesting pty.");
850:
851: /* Start the packet. */
852: packet_start(SSH_CMSG_REQUEST_PTY);
853:
854: /* Store TERM in the packet. There is no limit on the
855: length of the string. */
856: cp = getenv("TERM");
857: if (!cp)
858: cp = "";
1.124 markus 859: packet_put_cstring(cp);
1.31 markus 860:
861: /* Store window size in the packet. */
862: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
863: memset(&ws, 0, sizeof(ws));
864: packet_put_int(ws.ws_row);
865: packet_put_int(ws.ws_col);
866: packet_put_int(ws.ws_xpixel);
867: packet_put_int(ws.ws_ypixel);
868:
869: /* Store tty modes in the packet. */
1.115 stevesk 870: tty_make_modes(fileno(stdin), NULL);
1.31 markus 871:
872: /* Send the packet, and wait for it to leave. */
873: packet_send();
874: packet_write_wait();
875:
876: /* Read response from the server. */
1.156 markus 877: type = packet_read();
1.43 markus 878: if (type == SSH_SMSG_SUCCESS) {
1.31 markus 879: interactive = 1;
1.45 markus 880: have_tty = 1;
1.43 markus 881: } else if (type == SSH_SMSG_FAILURE)
1.186.2.2! brad 882: logit("Warning: Remote host failed or refused to allocate a pseudo tty.");
1.31 markus 883: else
884: packet_disconnect("Protocol error waiting for pty request response.");
885: }
886: /* Request X11 forwarding if enabled and DISPLAY is set. */
887: if (options.forward_x11 && getenv("DISPLAY") != NULL) {
1.150 stevesk 888: char *proto, *data;
1.50 markus 889: /* Get reasonable local authentication information. */
1.150 stevesk 890: x11_get_proto(&proto, &data);
1.50 markus 891: /* Request forwarding with authentication spoofing. */
1.31 markus 892: debug("Requesting X11 forwarding with authentication spoofing.");
1.50 markus 893: x11_request_forwarding_with_spoofing(0, proto, data);
1.31 markus 894:
895: /* Read response from the server. */
1.156 markus 896: type = packet_read();
1.31 markus 897: if (type == SSH_SMSG_SUCCESS) {
898: interactive = 1;
1.50 markus 899: } else if (type == SSH_SMSG_FAILURE) {
1.186.2.2! brad 900: logit("Warning: Remote host denied X11 forwarding.");
1.50 markus 901: } else {
1.31 markus 902: packet_disconnect("Protocol error waiting for X11 forwarding");
1.50 markus 903: }
1.31 markus 904: }
905: /* Tell the packet module whether this is an interactive session. */
1.80 markus 906: packet_set_interactive(interactive);
1.31 markus 907:
908: /* Request authentication agent forwarding if appropriate. */
1.70 markus 909: check_agent_present();
910:
1.31 markus 911: if (options.forward_agent) {
912: debug("Requesting authentication agent forwarding.");
913: auth_request_forwarding();
914:
915: /* Read response from the server. */
1.156 markus 916: type = packet_read();
1.155 markus 917: packet_check_eom();
1.31 markus 918: if (type != SSH_SMSG_SUCCESS)
1.186.2.2! brad 919: logit("Warning: Remote host denied authentication agent forwarding.");
1.31 markus 920: }
921:
1.70 markus 922: /* Initiate port forwardings. */
923: ssh_init_forwarding();
1.34 markus 924:
925: /* If requested, let ssh continue in the background. */
1.48 markus 926: if (fork_after_authentication_flag)
1.34 markus 927: if (daemon(1, 1) < 0)
928: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 929:
1.33 markus 930: /*
931: * If a command was specified on the command line, execute the
932: * command now. Otherwise request the server to start a shell.
933: */
1.31 markus 934: if (buffer_len(&command) > 0) {
935: int len = buffer_len(&command);
936: if (len > 900)
937: len = 900;
1.152 stevesk 938: debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
1.31 markus 939: packet_start(SSH_CMSG_EXEC_CMD);
940: packet_put_string(buffer_ptr(&command), buffer_len(&command));
941: packet_send();
942: packet_write_wait();
943: } else {
944: debug("Requesting shell.");
945: packet_start(SSH_CMSG_EXEC_SHELL);
946: packet_send();
947: packet_write_wait();
948: }
949:
950: /* Enter the interactive session. */
1.119 stevesk 951: return client_loop(have_tty, tty_flag ?
952: options.escape_char : SSH_ESCAPECHAR_NONE, 0);
1.45 markus 953: }
954:
1.126 itojun 955: static void
1.157 markus 956: client_subsystem_reply(int type, u_int32_t seq, void *ctxt)
1.89 markus 957: {
958: int id, len;
959:
960: id = packet_get_int();
961: len = buffer_len(&command);
1.100 markus 962: if (len > 900)
963: len = 900;
1.155 markus 964: packet_check_eom();
1.89 markus 965: if (type == SSH2_MSG_CHANNEL_FAILURE)
966: fatal("Request for subsystem '%.*s' failed on channel %d",
1.152 stevesk 967: len, (u_char *)buffer_ptr(&command), id);
1.170 markus 968: }
969:
970: void
971: client_global_request_reply(int type, u_int32_t seq, void *ctxt)
972: {
973: int i;
974:
975: i = client_global_request_id++;
976: if (i >= options.num_remote_forwards) {
977: debug("client_global_request_reply: too many replies %d > %d",
978: i, options.num_remote_forwards);
979: return;
980: }
981: debug("remote forward %s for: listen %d, connect %s:%d",
982: type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure",
983: options.remote_forwards[i].port,
984: options.remote_forwards[i].host,
985: options.remote_forwards[i].host_port);
986: if (type == SSH2_MSG_REQUEST_FAILURE)
1.186.2.2! brad 987: logit("Warning: remote port forwarding failed for listen port %d",
1.170 markus 988: options.remote_forwards[i].port);
1.89 markus 989: }
990:
1.143 markus 991: /* request pty/x11/agent/tcpfwd/shell for channel */
1.126 itojun 992: static void
1.143 markus 993: ssh_session2_setup(int id, void *arg)
1.45 markus 994: {
995: int len;
1.80 markus 996: int interactive = 0;
1.115 stevesk 997: struct termios tio;
1.80 markus 998:
1.186.2.1 margarid 999: debug2("ssh_session2_setup: id %d", id);
1.31 markus 1000:
1.45 markus 1001: if (tty_flag) {
1002: struct winsize ws;
1003: char *cp;
1004: cp = getenv("TERM");
1005: if (!cp)
1006: cp = "";
1007: /* Store window size in the packet. */
1008: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
1009: memset(&ws, 0, sizeof(ws));
1010:
1011: channel_request_start(id, "pty-req", 0);
1012: packet_put_cstring(cp);
1013: packet_put_int(ws.ws_col);
1014: packet_put_int(ws.ws_row);
1015: packet_put_int(ws.ws_xpixel);
1016: packet_put_int(ws.ws_ypixel);
1.115 stevesk 1017: tio = get_saved_tio();
1018: tty_make_modes(/*ignored*/ 0, &tio);
1.45 markus 1019: packet_send();
1.80 markus 1020: interactive = 1;
1.45 markus 1021: /* XXX wait for reply */
1022: }
1.50 markus 1023: if (options.forward_x11 &&
1024: getenv("DISPLAY") != NULL) {
1.150 stevesk 1025: char *proto, *data;
1.50 markus 1026: /* Get reasonable local authentication information. */
1.150 stevesk 1027: x11_get_proto(&proto, &data);
1.50 markus 1028: /* Request forwarding with authentication spoofing. */
1029: debug("Requesting X11 forwarding with authentication spoofing.");
1030: x11_request_forwarding_with_spoofing(id, proto, data);
1.80 markus 1031: interactive = 1;
1.50 markus 1032: /* XXX wait for reply */
1033: }
1034:
1.70 markus 1035: check_agent_present();
1036: if (options.forward_agent) {
1037: debug("Requesting authentication agent forwarding.");
1038: channel_request_start(id, "auth-agent-req@openssh.com", 0);
1039: packet_send();
1040: }
1041:
1.45 markus 1042: len = buffer_len(&command);
1043: if (len > 0) {
1044: if (len > 900)
1045: len = 900;
1.85 djm 1046: if (subsystem_flag) {
1.152 stevesk 1047: debug("Sending subsystem: %.*s", len, (u_char *)buffer_ptr(&command));
1.89 markus 1048: channel_request_start(id, "subsystem", /*want reply*/ 1);
1049: /* register callback for reply */
1.172 deraadt 1050: /* XXX we assume that client_loop has already been called */
1.89 markus 1051: dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &client_subsystem_reply);
1052: dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &client_subsystem_reply);
1.85 djm 1053: } else {
1.152 stevesk 1054: debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command));
1.85 djm 1055: channel_request_start(id, "exec", 0);
1056: }
1.100 markus 1057: packet_put_string(buffer_ptr(&command), buffer_len(&command));
1.45 markus 1058: packet_send();
1059: } else {
1.161 markus 1060: channel_request_start(id, "shell", 0);
1061: packet_send();
1.45 markus 1062: }
1.90 markus 1063:
1.80 markus 1064: packet_set_interactive(interactive);
1.45 markus 1065: }
1066:
1.143 markus 1067: /* open new channel for a session */
1.126 itojun 1068: static int
1.143 markus 1069: ssh_session2_open(void)
1.45 markus 1070: {
1.118 markus 1071: Channel *c;
1072: int window, packetmax, in, out, err;
1.60 markus 1073:
1.62 markus 1074: if (stdin_null_flag) {
1.93 itojun 1075: in = open(_PATH_DEVNULL, O_RDONLY);
1.62 markus 1076: } else {
1077: in = dup(STDIN_FILENO);
1078: }
1.60 markus 1079: out = dup(STDOUT_FILENO);
1080: err = dup(STDERR_FILENO);
1.45 markus 1081:
1082: if (in < 0 || out < 0 || err < 0)
1.62 markus 1083: fatal("dup() in/out/err failed");
1.45 markus 1084:
1.69 markus 1085: /* enable nonblocking unless tty */
1086: if (!isatty(in))
1087: set_nonblock(in);
1088: if (!isatty(out))
1089: set_nonblock(out);
1090: if (!isatty(err))
1091: set_nonblock(err);
1092:
1.65 markus 1093: window = CHAN_SES_WINDOW_DEFAULT;
1094: packetmax = CHAN_SES_PACKET_DEFAULT;
1.164 markus 1095: if (tty_flag) {
1096: window >>= 1;
1097: packetmax >>= 1;
1.45 markus 1098: }
1.118 markus 1099: c = channel_new(
1.45 markus 1100: "session", SSH_CHANNEL_OPENING, in, out, err,
1.65 markus 1101: window, packetmax, CHAN_EXTENDED_WRITE,
1.186.2.2! brad 1102: "client-session", /*nonblock*/0);
1.45 markus 1103:
1.143 markus 1104: debug3("ssh_session2_open: channel_new: %d", c->self);
1.106 markus 1105:
1.122 markus 1106: channel_send_open(c->self);
1.143 markus 1107: if (!no_shell_flag)
1.160 markus 1108: channel_register_confirm(c->self, ssh_session2_setup);
1.106 markus 1109:
1.118 markus 1110: return c->self;
1.106 markus 1111: }
1112:
1.126 itojun 1113: static int
1.106 markus 1114: ssh_session2(void)
1115: {
1.143 markus 1116: int id = -1;
1.106 markus 1117:
1118: /* XXX should be pre-session */
1119: ssh_init_forwarding();
1120:
1.143 markus 1121: if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN))
1122: id = ssh_session2_open();
1.106 markus 1123:
1124: /* If requested, let ssh continue in the background. */
1125: if (fork_after_authentication_flag)
1126: if (daemon(1, 1) < 0)
1127: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 1128:
1.119 stevesk 1129: return client_loop(tty_flag, tty_flag ?
1130: options.escape_char : SSH_ESCAPECHAR_NONE, id);
1.72 markus 1131: }
1132:
1.126 itojun 1133: static void
1.104 markus 1134: load_public_identity_files(void)
1135: {
1136: char *filename;
1.167 markus 1137: int i = 0;
1.104 markus 1138: Key *public;
1.167 markus 1139: #ifdef SMARTCARD
1140: Key **keys;
1.104 markus 1141:
1.133 markus 1142: if (options.smartcard_device != NULL &&
1.167 markus 1143: options.num_identity_files < SSH_MAX_IDENTITY_FILES &&
1144: (keys = sc_get_keys(options.smartcard_device, NULL)) != NULL ) {
1145: int count = 0;
1146: for (i = 0; keys[i] != NULL; i++) {
1147: count++;
1148: memmove(&options.identity_files[1], &options.identity_files[0],
1149: sizeof(char *) * (SSH_MAX_IDENTITY_FILES - 1));
1150: memmove(&options.identity_keys[1], &options.identity_keys[0],
1151: sizeof(Key *) * (SSH_MAX_IDENTITY_FILES - 1));
1152: options.num_identity_files++;
1153: options.identity_keys[0] = keys[i];
1.186.2.2! brad 1154: options.identity_files[0] = sc_get_key_label(keys[i]);
1.167 markus 1155: }
1.168 markus 1156: if (options.num_identity_files > SSH_MAX_IDENTITY_FILES)
1157: options.num_identity_files = SSH_MAX_IDENTITY_FILES;
1.167 markus 1158: i = count;
1159: xfree(keys);
1.127 markus 1160: }
1.136 jakob 1161: #endif /* SMARTCARD */
1.131 millert 1162: for (; i < options.num_identity_files; i++) {
1163: filename = tilde_expand_filename(options.identity_files[i],
1164: original_real_uid);
1165: public = key_load_public(filename, NULL);
1166: debug("identity file %s type %d", filename,
1167: public ? public->type : -1);
1168: xfree(options.identity_files[i]);
1169: options.identity_files[i] = filename;
1170: options.identity_keys[i] = public;
1171: }
1.1 deraadt 1172: }
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