Annotation of src/usr.bin/ssh/ssh.c, Revision 1.140
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.
16: *
17: * Modified to work with SSL by Niels Provos <provos@citi.umich.edu>
18: * in Canada (German citizen).
19: *
20: * Redistribution and use in source and binary forms, with or without
21: * modification, are permitted provided that the following conditions
22: * are met:
23: * 1. Redistributions of source code must retain the above copyright
24: * notice, this list of conditions and the following disclaimer.
25: * 2. Redistributions in binary form must reproduce the above copyright
26: * notice, this list of conditions and the following disclaimer in the
27: * documentation and/or other materials provided with the distribution.
28: *
29: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
30: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
32: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.32 deraadt 39: */
1.1 deraadt 40:
41: #include "includes.h"
1.140 ! stevesk 42: RCSID("$OpenBSD: ssh.c,v 1.139 2001/08/28 15:39:48 markus Exp $");
1.49 markus 43:
44: #include <openssl/evp.h>
1.72 markus 45: #include <openssl/err.h>
1.1 deraadt 46:
1.84 markus 47: #include "ssh.h"
48: #include "ssh1.h"
49: #include "ssh2.h"
50: #include "compat.h"
51: #include "cipher.h"
1.1 deraadt 52: #include "xmalloc.h"
53: #include "packet.h"
54: #include "buffer.h"
55: #include "uidswap.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 <openssl/engine.h>
74: #include "scard.h"
1.137 jakob 75: #endif
1.127 markus 76:
1.49 markus 77: extern char *__progname;
1.1 deraadt 78:
1.37 markus 79: /* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
80: Default value is AF_UNSPEC means both IPv4 and IPv6. */
81: int IPv4or6 = AF_UNSPEC;
82:
1.31 markus 83: /* Flag indicating whether debug mode is on. This can be set on the command line. */
1.1 deraadt 84: int debug_flag = 0;
85:
1.46 markus 86: /* Flag indicating whether a tty should be allocated */
1.1 deraadt 87: int tty_flag = 0;
1.79 markus 88: int no_tty_flag = 0;
89: int force_tty_flag = 0;
1.1 deraadt 90:
1.45 markus 91: /* don't exec a shell */
92: int no_shell_flag = 0;
93:
1.33 markus 94: /*
95: * Flag indicating that nothing should be read from stdin. This can be set
96: * on the command line.
97: */
1.1 deraadt 98: int stdin_null_flag = 0;
99:
1.33 markus 100: /*
101: * Flag indicating that ssh should fork after authentication. This is useful
102: * so that the pasphrase can be entered manually, and then ssh goes to the
103: * background.
104: */
1.1 deraadt 105: int fork_after_authentication_flag = 0;
106:
1.33 markus 107: /*
108: * General data structure for command line options and options configurable
109: * in configuration files. See readconf.h.
110: */
1.1 deraadt 111: Options options;
112:
1.139 markus 113: /* optional user configfile */
114: char *config = NULL;
115:
1.33 markus 116: /*
117: * Name of the host we are connecting to. This is the name given on the
118: * command line, or the HostName specified for the user-supplied name in a
119: * configuration file.
120: */
1.1 deraadt 121: char *host;
122:
1.22 provos 123: /* socket address the host resolves to */
1.37 markus 124: struct sockaddr_storage hostaddr;
1.22 provos 125:
1.33 markus 126: /*
127: * Flag to indicate that we have received a window change signal which has
128: * not yet been processed. This will cause a message indicating the new
129: * window size to be sent to the server a little later. This is volatile
130: * because this is updated in a signal handler.
131: */
1.1 deraadt 132: volatile int received_window_change_signal = 0;
133:
1.112 markus 134: /* Private host keys. */
135: struct {
136: Key **keys;
137: int nkeys;
138: } sensitive_data;
1.1 deraadt 139:
1.10 dugsong 140: /* Original real UID. */
141: uid_t original_real_uid;
1.1 deraadt 142:
1.45 markus 143: /* command to be executed */
144: Buffer command;
145:
1.85 djm 146: /* Should we execute a command or invoke a subsystem? */
147: int subsystem_flag = 0;
148:
1.1 deraadt 149: /* Prints a help message to the user. This function never returns. */
150:
1.126 itojun 151: static void
1.93 itojun 152: usage(void)
1.1 deraadt 153: {
1.76 markus 154: fprintf(stderr, "Usage: %s [options] host [command]\n", __progname);
1.31 markus 155: fprintf(stderr, "Options:\n");
156: fprintf(stderr, " -l user Log in using this user name.\n");
1.93 itojun 157: fprintf(stderr, " -n Redirect input from " _PATH_DEVNULL ".\n");
1.139 markus 158: fprintf(stderr, " -F config Config file (default: ~/%s).\n",
159: _PATH_SSH_USER_CONFFILE);
1.53 markus 160: fprintf(stderr, " -A Enable authentication agent forwarding.\n");
1.120 markus 161: fprintf(stderr, " -a Disable authentication agent forwarding (default).\n");
1.9 dugsong 162: #ifdef AFS
1.31 markus 163: fprintf(stderr, " -k Disable Kerberos ticket and AFS token forwarding.\n");
164: #endif /* AFS */
1.88 stevesk 165: fprintf(stderr, " -X Enable X11 connection forwarding.\n");
1.120 markus 166: fprintf(stderr, " -x Disable X11 connection forwarding (default).\n");
1.99 deraadt 167: fprintf(stderr, " -i file Identity for public key authentication "
168: "(default: ~/.ssh/identity)\n");
1.135 jakob 169: #ifdef SMARTCARD
170: fprintf(stderr, " -I reader Set smartcard reader.\n");
1.137 jakob 171: #endif
1.31 markus 172: fprintf(stderr, " -t Tty; allocate a tty even if command is given.\n");
1.45 markus 173: fprintf(stderr, " -T Do not allocate a tty.\n");
1.31 markus 174: fprintf(stderr, " -v Verbose; display verbose debugging messages.\n");
1.66 markus 175: fprintf(stderr, " Multiple -v increases verbosity.\n");
1.31 markus 176: fprintf(stderr, " -V Display version number only.\n");
177: fprintf(stderr, " -P Don't allocate a privileged port.\n");
178: fprintf(stderr, " -q Quiet; don't display any warning messages.\n");
179: fprintf(stderr, " -f Fork into background after authentication.\n");
180: fprintf(stderr, " -e char Set escape character; ``none'' = disable (default: ~).\n");
181:
1.120 markus 182: fprintf(stderr, " -c cipher Select encryption algorithm\n");
1.102 stevesk 183: fprintf(stderr, " -m macs Specify MAC algorithms for protocol version 2.\n");
1.31 markus 184: fprintf(stderr, " -p port Connect to this port. Server must be on the same port.\n");
185: fprintf(stderr, " -L listen-port:host:port Forward local port to remote address\n");
186: fprintf(stderr, " -R listen-port:host:port Forward remote port to local address\n");
1.76 markus 187: fprintf(stderr, " These cause %s to listen for connections on a port, and\n", __progname);
1.31 markus 188: fprintf(stderr, " forward them to the other side by connecting to host:port.\n");
1.140 ! stevesk 189: fprintf(stderr, " -D port Enable dynamic application-level port forwarding.\n");
1.31 markus 190: fprintf(stderr, " -C Enable compression.\n");
1.45 markus 191: fprintf(stderr, " -N Do not execute a shell or command.\n");
1.31 markus 192: fprintf(stderr, " -g Allow remote hosts to connect to forwarded ports.\n");
1.92 jakob 193: fprintf(stderr, " -1 Force protocol version 1.\n");
194: fprintf(stderr, " -2 Force protocol version 2.\n");
1.37 markus 195: fprintf(stderr, " -4 Use IPv4 only.\n");
196: fprintf(stderr, " -6 Use IPv6 only.\n");
1.31 markus 197: fprintf(stderr, " -o 'option' Process the option as if it was read from a configuration file.\n");
1.85 djm 198: fprintf(stderr, " -s Invoke command (mandatory) as SSH2 subsystem.\n");
1.120 markus 199: fprintf(stderr, " -b addr Local IP address.\n");
1.31 markus 200: exit(1);
1.1 deraadt 201: }
202:
1.32 deraadt 203: /*
204: * Connects to the given host using rsh (or prints an error message and exits
205: * if rsh is not available). This function never returns.
206: */
1.126 itojun 207: static void
1.31 markus 208: rsh_connect(char *host, char *user, Buffer * command)
1.1 deraadt 209: {
1.31 markus 210: char *args[10];
211: int i;
212:
213: log("Using rsh. WARNING: Connection will not be encrypted.");
214: /* Build argument list for rsh. */
215: i = 0;
216: args[i++] = _PATH_RSH;
217: /* host may have to come after user on some systems */
218: args[i++] = host;
219: if (user) {
220: args[i++] = "-l";
221: args[i++] = user;
222: }
223: if (buffer_len(command) > 0) {
224: buffer_append(command, "\0", 1);
225: args[i++] = buffer_ptr(command);
226: }
227: args[i++] = NULL;
228: if (debug_flag) {
229: for (i = 0; args[i]; i++) {
230: if (i != 0)
231: fprintf(stderr, " ");
232: fprintf(stderr, "%s", args[i]);
233: }
234: fprintf(stderr, "\n");
235: }
236: execv(_PATH_RSH, args);
237: perror(_PATH_RSH);
238: exit(1);
1.1 deraadt 239: }
240:
1.126 itojun 241: static int ssh_session(void);
242: static int ssh_session2(void);
243: static void load_public_identity_files(void);
1.45 markus 244:
1.32 deraadt 245: /*
246: * Main program for the ssh client.
247: */
1.2 provos 248: int
249: main(int ac, char **av)
1.1 deraadt 250: {
1.130 markus 251: int i, opt, exit_status, cerr;
1.35 markus 252: u_short fwd_port, fwd_host_port;
1.128 fgsch 253: char *p, *cp, buf[256];
1.31 markus 254: struct stat st;
1.98 markus 255: struct passwd *pw;
1.45 markus 256: int dummy;
1.31 markus 257: uid_t original_effective_uid;
258:
1.33 markus 259: /*
260: * Save the original real uid. It will be needed later (uid-swapping
261: * may clobber the real uid).
262: */
1.31 markus 263: original_real_uid = getuid();
264: original_effective_uid = geteuid();
265:
266: /* If we are installed setuid root be careful to not drop core. */
267: if (original_real_uid != original_effective_uid) {
268: struct rlimit rlim;
269: rlim.rlim_cur = rlim.rlim_max = 0;
270: if (setrlimit(RLIMIT_CORE, &rlim) < 0)
271: fatal("setrlimit failed: %.100s", strerror(errno));
1.1 deraadt 272: }
1.107 markus 273: /* Get user data. */
274: pw = getpwuid(original_real_uid);
275: if (!pw) {
276: log("You don't exist, go away!");
277: exit(1);
278: }
279: /* Take a copy of the returned structure. */
280: pw = pwcopy(pw);
281:
1.33 markus 282: /*
283: * Use uid-swapping to give up root privileges for the duration of
284: * option processing. We will re-instantiate the rights when we are
285: * ready to create the privileged port, and will permanently drop
286: * them when the port has been created (actually, when the connection
287: * has been made, as we may need to create the port several times).
288: */
1.107 markus 289: temporarily_use_uid(pw);
1.31 markus 290:
1.33 markus 291: /*
292: * Set our umask to something reasonable, as some files are created
293: * with the default umask. This will make them world-readable but
294: * writable only by the owner, which is ok for all files for which we
295: * don't set the modes explicitly.
296: */
1.31 markus 297: umask(022);
298:
299: /* Initialize option structure to indicate that no values have been set. */
300: initialize_options(&options);
301:
302: /* Parse command-line arguments. */
303: host = NULL;
304:
1.128 fgsch 305: again:
306: while ((opt = getopt(ac, av,
1.139 markus 307: "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:NPR:TVX")) != -1) {
1.31 markus 308: switch (opt) {
1.91 jakob 309: case '1':
310: options.protocol = SSH_PROTO_1;
311: break;
1.47 markus 312: case '2':
313: options.protocol = SSH_PROTO_2;
314: break;
1.37 markus 315: case '4':
316: IPv4or6 = AF_INET;
317: break;
318: case '6':
319: IPv4or6 = AF_INET6;
320: break;
1.31 markus 321: case 'n':
322: stdin_null_flag = 1;
323: break;
324: case 'f':
325: fork_after_authentication_flag = 1;
326: stdin_null_flag = 1;
327: break;
328: case 'x':
329: options.forward_x11 = 0;
330: break;
331: case 'X':
332: options.forward_x11 = 1;
333: break;
334: case 'g':
335: options.gateway_ports = 1;
336: break;
337: case 'P':
338: options.use_privileged_port = 0;
339: break;
340: case 'a':
341: options.forward_agent = 0;
1.53 markus 342: break;
343: case 'A':
344: options.forward_agent = 1;
1.31 markus 345: break;
1.9 dugsong 346: #ifdef AFS
1.31 markus 347: case 'k':
348: options.kerberos_tgt_passing = 0;
349: options.afs_token_passing = 0;
350: break;
1.1 deraadt 351: #endif
1.31 markus 352: case 'i':
353: if (stat(optarg, &st) < 0) {
1.128 fgsch 354: fprintf(stderr, "Warning: Identity file %s "
355: "does not exist.\n", optarg);
1.31 markus 356: break;
357: }
1.128 fgsch 358: if (options.num_identity_files >=
359: SSH_MAX_IDENTITY_FILES)
360: fatal("Too many identity files specified "
361: "(max %d)", SSH_MAX_IDENTITY_FILES);
362: options.identity_files[options.num_identity_files++] =
363: xstrdup(optarg);
1.31 markus 364: break;
1.127 markus 365: case 'I':
366: #ifdef SMARTCARD
1.133 markus 367: options.smartcard_device = xstrdup(optarg);
1.137 jakob 368: #else
1.127 markus 369: fprintf(stderr, "no support for smartcards.\n");
1.137 jakob 370: #endif
1.127 markus 371: break;
1.31 markus 372: case 't':
1.79 markus 373: if (tty_flag)
374: force_tty_flag = 1;
1.31 markus 375: tty_flag = 1;
376: break;
377: case 'v':
1.66 markus 378: if (0 == debug_flag) {
379: debug_flag = 1;
380: options.log_level = SYSLOG_LEVEL_DEBUG1;
381: } else if (options.log_level < SYSLOG_LEVEL_DEBUG3) {
382: options.log_level++;
383: break;
1.128 fgsch 384: } else
1.103 millert 385: fatal("Too high debugging level.");
1.66 markus 386: /* fallthrough */
1.31 markus 387: case 'V':
1.96 deraadt 388: fprintf(stderr,
389: "%s, SSH protocols %d.%d/%d.%d, OpenSSL 0x%8.8lx\n",
1.46 markus 390: SSH_VERSION,
391: PROTOCOL_MAJOR_1, PROTOCOL_MINOR_1,
1.96 deraadt 392: PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2,
393: SSLeay());
1.31 markus 394: if (opt == 'V')
395: exit(0);
396: break;
397: case 'q':
398: options.log_level = SYSLOG_LEVEL_QUIET;
399: break;
400: case 'e':
401: if (optarg[0] == '^' && optarg[2] == 0 &&
1.128 fgsch 402: (u_char) optarg[1] >= 64 &&
403: (u_char) optarg[1] < 128)
1.78 markus 404: options.escape_char = (u_char) optarg[1] & 31;
1.31 markus 405: else if (strlen(optarg) == 1)
1.78 markus 406: options.escape_char = (u_char) optarg[0];
1.31 markus 407: else if (strcmp(optarg, "none") == 0)
1.119 stevesk 408: options.escape_char = SSH_ESCAPECHAR_NONE;
1.31 markus 409: else {
1.128 fgsch 410: fprintf(stderr, "Bad escape character '%s'.\n",
411: optarg);
1.31 markus 412: exit(1);
413: }
414: break;
415: case 'c':
1.49 markus 416: if (ciphers_valid(optarg)) {
417: /* SSH2 only */
418: options.ciphers = xstrdup(optarg);
1.51 markus 419: options.cipher = SSH_CIPHER_ILLEGAL;
1.49 markus 420: } else {
421: /* SSH1 only */
1.74 markus 422: options.cipher = cipher_number(optarg);
423: if (options.cipher == -1) {
1.128 fgsch 424: fprintf(stderr,
425: "Unknown cipher type '%s'\n",
426: optarg);
1.49 markus 427: exit(1);
428: }
1.128 fgsch 429: if (options.cipher == SSH_CIPHER_3DES)
1.74 markus 430: options.ciphers = "3des-cbc";
1.128 fgsch 431: else if (options.cipher == SSH_CIPHER_BLOWFISH)
1.74 markus 432: options.ciphers = "blowfish-cbc";
1.128 fgsch 433: else
1.74 markus 434: options.ciphers = (char *)-1;
1.95 markus 435: }
436: break;
437: case 'm':
438: if (mac_valid(optarg))
439: options.macs = xstrdup(optarg);
440: else {
1.128 fgsch 441: fprintf(stderr, "Unknown mac type '%s'\n",
442: optarg);
1.95 markus 443: exit(1);
1.31 markus 444: }
445: break;
446: case 'p':
1.113 stevesk 447: options.port = a2port(optarg);
448: if (options.port == 0) {
1.109 markus 449: fprintf(stderr, "Bad port '%s'\n", optarg);
450: exit(1);
451: }
1.31 markus 452: break;
453: case 'l':
454: options.user = optarg;
455: break;
456: case 'R':
1.37 markus 457: if (sscanf(optarg, "%hu/%255[^/]/%hu", &fwd_port, buf,
458: &fwd_host_port) != 3 &&
459: sscanf(optarg, "%hu:%255[^:]:%hu", &fwd_port, buf,
460: &fwd_host_port) != 3) {
1.128 fgsch 461: fprintf(stderr,
462: "Bad forwarding specification '%s'.\n",
463: optarg);
1.31 markus 464: usage();
465: /* NOTREACHED */
466: }
1.128 fgsch 467: add_remote_forward(&options, fwd_port, buf,
468: fwd_host_port);
1.31 markus 469: break;
470: case 'L':
1.37 markus 471: if (sscanf(optarg, "%hu/%255[^/]/%hu", &fwd_port, buf,
472: &fwd_host_port) != 3 &&
473: sscanf(optarg, "%hu:%255[^:]:%hu", &fwd_port, buf,
474: &fwd_host_port) != 3) {
1.128 fgsch 475: fprintf(stderr,
476: "Bad forwarding specification '%s'.\n",
477: optarg);
1.31 markus 478: usage();
479: /* NOTREACHED */
480: }
1.128 fgsch 481: add_local_forward(&options, fwd_port, buf,
482: fwd_host_port);
1.31 markus 483: break;
1.108 markus 484:
485: case 'D':
1.113 stevesk 486: fwd_port = a2port(optarg);
487: if (fwd_port == 0) {
1.128 fgsch 488: fprintf(stderr, "Bad dynamic port '%s'\n",
489: optarg);
1.109 markus 490: exit(1);
491: }
1.108 markus 492: add_local_forward(&options, fwd_port, "socks4", 0);
493: break;
494:
1.31 markus 495: case 'C':
496: options.compression = 1;
497: break;
1.45 markus 498: case 'N':
499: no_shell_flag = 1;
500: no_tty_flag = 1;
501: break;
502: case 'T':
503: no_tty_flag = 1;
504: break;
1.31 markus 505: case 'o':
506: dummy = 1;
1.128 fgsch 507: if (process_config_line(&options, host ? host : "",
508: optarg, "command-line", 0, &dummy) != 0)
1.31 markus 509: exit(1);
510: break;
1.85 djm 511: case 's':
512: subsystem_flag = 1;
1.117 markus 513: break;
514: case 'b':
515: options.bind_address = optarg;
1.85 djm 516: break;
1.139 markus 517: case 'F':
518: config = optarg;
519: break;
1.31 markus 520: default:
521: usage();
1.1 deraadt 522: }
1.31 markus 523: }
524:
1.128 fgsch 525: ac -= optind;
526: av += optind;
527:
528: if (ac > 0 && !host && **av != '-') {
529: if (strchr(*av, '@')) {
530: p = xstrdup(*av);
531: cp = strchr(p, '@');
532: if (cp == NULL || cp == p)
533: usage();
534: options.user = p;
535: *cp = '\0';
536: host = ++cp;
537: } else
538: host = *av;
539: ac--, av++;
540: if (ac > 0) {
541: optind = 0;
542: optreset = 1;
543: goto again;
544: }
545: }
546:
1.31 markus 547: /* Check that we got a host name. */
548: if (!host)
549: usage();
550:
1.54 markus 551: SSLeay_add_all_algorithms();
1.72 markus 552: ERR_load_crypto_strings();
1.31 markus 553:
554: /* Initialize the command to execute on remote host. */
555: buffer_init(&command);
1.1 deraadt 556:
1.33 markus 557: /*
558: * Save the command to execute on the remote host in a buffer. There
559: * is no limit on the length of the command, except by the maximum
560: * packet size. Also sets the tty flag if there is no command.
561: */
1.128 fgsch 562: if (!ac) {
1.31 markus 563: /* No command specified - execute shell on a tty. */
564: tty_flag = 1;
1.85 djm 565: if (subsystem_flag) {
1.128 fgsch 566: fprintf(stderr,
567: "You must specify a subsystem to invoke.\n");
1.85 djm 568: usage();
569: }
1.31 markus 570: } else {
1.128 fgsch 571: /* A command has been specified. Store it into the buffer. */
572: for (i = 0; i < ac; i++) {
573: if (i)
1.31 markus 574: buffer_append(&command, " ", 1);
575: buffer_append(&command, av[i], strlen(av[i]));
576: }
577: }
578:
579: /* Cannot fork to background if no command. */
1.63 markus 580: if (fork_after_authentication_flag && buffer_len(&command) == 0 && !no_shell_flag)
1.31 markus 581: fatal("Cannot fork into background without a command to execute.");
582:
583: /* Allocate a tty by default if no command specified. */
584: if (buffer_len(&command) == 0)
585: tty_flag = 1;
586:
1.75 markus 587: /* Force no tty*/
588: if (no_tty_flag)
589: tty_flag = 0;
1.31 markus 590: /* Do not allocate a tty if stdin is not a tty. */
1.79 markus 591: if (!isatty(fileno(stdin)) && !force_tty_flag) {
1.31 markus 592: if (tty_flag)
1.103 millert 593: log("Pseudo-terminal will not be allocated because stdin is not a terminal.");
1.31 markus 594: tty_flag = 0;
595: }
1.45 markus 596:
1.101 markus 597: /*
598: * Initialize "log" output. Since we are the client all output
599: * actually goes to stderr.
600: */
1.111 markus 601: log_init(av[0], options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level,
602: SYSLOG_FACILITY_USER, 1);
1.31 markus 603:
1.139 markus 604: /*
605: * Read per-user configuration file. Ignore the system wide config
606: * file if the user specifies a config file on the command line.
607: */
608: if (config != NULL) {
609: read_config_file(config, host, &options);
610: } else {
611: snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir,
612: _PATH_SSH_USER_CONFFILE);
613:
614: /* Read systemwide configuration file. */
615: read_config_file(_PATH_HOST_CONFIG_FILE, host, &options);
616: read_config_file(buf, host, &options);
617: }
1.31 markus 618:
619: /* Fill configuration defaults. */
620: fill_default_options(&options);
621:
622: /* reinit */
1.101 markus 623: log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1);
1.31 markus 624:
625: if (options.user == NULL)
626: options.user = xstrdup(pw->pw_name);
627:
628: if (options.hostname != NULL)
629: host = options.hostname;
630:
631: /* Disable rhosts authentication if not running as root. */
632: if (original_effective_uid != 0 || !options.use_privileged_port) {
1.77 markus 633: debug("Rhosts Authentication disabled, "
1.71 markus 634: "originating port will not be trusted.");
1.31 markus 635: options.rhosts_authentication = 0;
636: }
1.33 markus 637: /*
638: * If using rsh has been selected, exec it now (without trying
639: * anything else). Note that we must release privileges first.
640: */
1.31 markus 641: if (options.use_rsh) {
1.33 markus 642: /*
643: * Restore our superuser privileges. This must be done
644: * before permanently setting the uid.
645: */
1.31 markus 646: restore_uid();
647:
648: /* Switch to the original uid permanently. */
1.107 markus 649: permanently_set_uid(pw);
1.31 markus 650:
651: /* Execute rsh. */
652: rsh_connect(host, options.user, &command);
653: fatal("rsh_connect returned");
654: }
655: /* Restore our superuser privileges. */
656: restore_uid();
657:
1.77 markus 658: /* Open a connection to the remote host. */
1.31 markus 659:
1.130 markus 660: cerr = ssh_connect(host, &hostaddr, options.port,
1.77 markus 661: options.connection_attempts,
662: original_effective_uid != 0 || !options.use_privileged_port,
1.107 markus 663: pw, options.proxy_command);
1.31 markus 664:
1.33 markus 665: /*
666: * If we successfully made the connection, load the host private key
667: * in case we will need it later for combined rsa-rhosts
668: * authentication. This must be done before releasing extra
669: * privileges, because the file is only readable by root.
670: */
1.112 markus 671: sensitive_data.nkeys = 0;
672: sensitive_data.keys = NULL;
1.130 markus 673: if (!cerr && (options.rhosts_rsa_authentication ||
1.112 markus 674: options.hostbased_authentication)) {
675: sensitive_data.nkeys = 3;
676: sensitive_data.keys = xmalloc(sensitive_data.nkeys*sizeof(Key));
677: sensitive_data.keys[0] = key_load_private_type(KEY_RSA1,
1.105 markus 678: _PATH_HOST_KEY_FILE, "", NULL);
1.112 markus 679: sensitive_data.keys[1] = key_load_private_type(KEY_DSA,
680: _PATH_HOST_DSA_KEY_FILE, "", NULL);
681: sensitive_data.keys[2] = key_load_private_type(KEY_RSA,
682: _PATH_HOST_RSA_KEY_FILE, "", NULL);
1.31 markus 683: }
1.33 markus 684: /*
685: * Get rid of any extra privileges that we may have. We will no
686: * longer need them. Also, extra privileges could make it very hard
687: * to read identity files and other non-world-readable files from the
688: * user's home directory if it happens to be on a NFS volume where
689: * root is mapped to nobody.
690: */
691:
692: /*
693: * Note that some legacy systems need to postpone the following call
694: * to permanently_set_uid() until the private hostkey is destroyed
695: * with RSA_free(). Otherwise the calling user could ptrace() the
696: * process, read the private hostkey and impersonate the host.
697: * OpenBSD does not allow ptracing of setuid processes.
698: */
1.107 markus 699: permanently_set_uid(pw);
1.31 markus 700:
1.33 markus 701: /*
702: * Now that we are back to our own permissions, create ~/.ssh
703: * directory if it doesn\'t already exist.
704: */
1.138 jakob 705: snprintf(buf, sizeof buf, "%.100s%s%.100s", pw->pw_dir, strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR);
1.31 markus 706: if (stat(buf, &st) < 0)
1.57 djm 707: if (mkdir(buf, 0700) < 0)
1.31 markus 708: error("Could not create directory '%.200s'.", buf);
709:
710: /* Check if the connection failed, and try "rsh" if appropriate. */
1.130 markus 711: if (cerr) {
712: if (!options.fallback_to_rsh)
713: exit(1);
1.31 markus 714: if (options.port != 0)
1.130 markus 715: log("Secure connection to %.100s on port %hu refused; "
716: "reverting to insecure method",
717: host, options.port);
1.31 markus 718: else
1.130 markus 719: log("Secure connection to %.100s refused; "
720: "reverting to insecure method.", host);
1.31 markus 721:
1.130 markus 722: rsh_connect(host, options.user, &command);
723: fatal("rsh_connect returned");
1.31 markus 724: }
1.104 markus 725: /* load options.identity_files */
726: load_public_identity_files();
727:
728: /* Expand ~ in known host file names. */
729: /* XXX mem-leaks: */
1.72 markus 730: options.system_hostfile =
731: tilde_expand_filename(options.system_hostfile, original_real_uid);
732: options.user_hostfile =
733: tilde_expand_filename(options.user_hostfile, original_real_uid);
734: options.system_hostfile2 =
735: tilde_expand_filename(options.system_hostfile2, original_real_uid);
736: options.user_hostfile2 =
737: tilde_expand_filename(options.user_hostfile2, original_real_uid);
1.31 markus 738:
739: /* Log into the remote system. This never returns if the login fails. */
1.112 markus 740: ssh_login(sensitive_data.keys, sensitive_data.nkeys,
741: host, (struct sockaddr *)&hostaddr, pw);
1.31 markus 742:
1.112 markus 743: /* We no longer need the private host keys. Clear them now. */
744: if (sensitive_data.nkeys != 0) {
745: for (i = 0; i < sensitive_data.nkeys; i++) {
746: if (sensitive_data.keys[i] != NULL) {
747: /* Destroys contents safely */
748: debug3("clear hostkey %d", i);
749: key_free(sensitive_data.keys[i]);
750: sensitive_data.keys[i] = NULL;
751: }
752: }
753: xfree(sensitive_data.keys);
1.134 markus 754: }
755: for (i = 0; i < options.num_identity_files; i++) {
756: if (options.identity_files[i]) {
757: xfree(options.identity_files[i]);
758: options.identity_files[i] = NULL;
759: }
760: if (options.identity_keys[i]) {
761: key_free(options.identity_keys[i]);
762: options.identity_keys[i] = NULL;
763: }
1.112 markus 764: }
1.31 markus 765:
1.45 markus 766: exit_status = compat20 ? ssh_session2() : ssh_session();
767: packet_close();
768: return exit_status;
769: }
770:
1.126 itojun 771: static void
1.50 markus 772: x11_get_proto(char *proto, int proto_len, char *data, int data_len)
773: {
774: char line[512];
775: FILE *f;
776: int got_data = 0, i;
777:
1.55 markus 778: if (options.xauth_location) {
779: /* Try to get Xauthority information for the display. */
1.93 itojun 780: snprintf(line, sizeof line, "%.100s list %.200s 2>" _PATH_DEVNULL,
1.55 markus 781: options.xauth_location, getenv("DISPLAY"));
782: f = popen(line, "r");
783: if (f && fgets(line, sizeof(line), f) &&
784: sscanf(line, "%*s %s %s", proto, data) == 2)
785: got_data = 1;
786: if (f)
787: pclose(f);
788: }
1.50 markus 789: /*
790: * If we didn't get authentication data, just make up some
791: * data. The forwarding code will check the validity of the
792: * response anyway, and substitute this data. The X11
793: * server, however, will ignore this fake data and use
794: * whatever authentication mechanisms it was using otherwise
795: * for the local connection.
796: */
797: if (!got_data) {
798: u_int32_t rand = 0;
799:
800: strlcpy(proto, "MIT-MAGIC-COOKIE-1", proto_len);
801: for (i = 0; i < 16; i++) {
802: if (i % 4 == 0)
803: rand = arc4random();
804: snprintf(data + 2 * i, data_len - 2 * i, "%02x", rand & 0xff);
805: rand >>= 8;
806: }
807: }
808: }
809:
1.126 itojun 810: static void
1.70 markus 811: ssh_init_forwarding(void)
812: {
1.86 markus 813: int success = 0;
1.70 markus 814: int i;
1.86 markus 815:
1.70 markus 816: /* Initiate local TCP/IP port forwardings. */
817: for (i = 0; i < options.num_local_forwards; i++) {
818: debug("Connections to local port %d forwarded to remote address %.200s:%d",
819: options.local_forwards[i].port,
820: options.local_forwards[i].host,
821: options.local_forwards[i].host_port);
1.86 markus 822: success += channel_request_local_forwarding(
1.70 markus 823: options.local_forwards[i].port,
824: options.local_forwards[i].host,
825: options.local_forwards[i].host_port,
826: options.gateway_ports);
827: }
1.86 markus 828: if (i > 0 && success == 0)
829: error("Could not request local forwarding.");
1.70 markus 830:
831: /* Initiate remote TCP/IP port forwardings. */
832: for (i = 0; i < options.num_remote_forwards; i++) {
833: debug("Connections to remote port %d forwarded to local address %.200s:%d",
834: options.remote_forwards[i].port,
835: options.remote_forwards[i].host,
836: options.remote_forwards[i].host_port);
837: channel_request_remote_forwarding(
838: options.remote_forwards[i].port,
839: options.remote_forwards[i].host,
840: options.remote_forwards[i].host_port);
841: }
842: }
843:
1.126 itojun 844: static void
1.70 markus 845: check_agent_present(void)
846: {
847: if (options.forward_agent) {
848: /* Clear agent forwarding if we don\'t have an agent. */
849: int authfd = ssh_get_authentication_socket();
850: if (authfd < 0)
851: options.forward_agent = 0;
852: else
853: ssh_close_authentication_socket(authfd);
854: }
855: }
856:
1.126 itojun 857: static int
1.45 markus 858: ssh_session(void)
859: {
860: int type;
861: int plen;
862: int interactive = 0;
863: int have_tty = 0;
864: struct winsize ws;
865: char *cp;
866:
1.31 markus 867: /* Enable compression if requested. */
868: if (options.compression) {
869: debug("Requesting compression at level %d.", options.compression_level);
870:
871: if (options.compression_level < 1 || options.compression_level > 9)
872: fatal("Compression level must be from 1 (fast) to 9 (slow, best).");
873:
874: /* Send the request. */
875: packet_start(SSH_CMSG_REQUEST_COMPRESSION);
876: packet_put_int(options.compression_level);
877: packet_send();
878: packet_write_wait();
879: type = packet_read(&plen);
880: if (type == SSH_SMSG_SUCCESS)
881: packet_start_compression(options.compression_level);
882: else if (type == SSH_SMSG_FAILURE)
883: log("Warning: Remote host refused compression.");
884: else
885: packet_disconnect("Protocol error waiting for compression response.");
886: }
887: /* Allocate a pseudo tty if appropriate. */
888: if (tty_flag) {
889: debug("Requesting pty.");
890:
891: /* Start the packet. */
892: packet_start(SSH_CMSG_REQUEST_PTY);
893:
894: /* Store TERM in the packet. There is no limit on the
895: length of the string. */
896: cp = getenv("TERM");
897: if (!cp)
898: cp = "";
1.124 markus 899: packet_put_cstring(cp);
1.31 markus 900:
901: /* Store window size in the packet. */
902: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
903: memset(&ws, 0, sizeof(ws));
904: packet_put_int(ws.ws_row);
905: packet_put_int(ws.ws_col);
906: packet_put_int(ws.ws_xpixel);
907: packet_put_int(ws.ws_ypixel);
908:
909: /* Store tty modes in the packet. */
1.115 stevesk 910: tty_make_modes(fileno(stdin), NULL);
1.31 markus 911:
912: /* Send the packet, and wait for it to leave. */
913: packet_send();
914: packet_write_wait();
915:
916: /* Read response from the server. */
917: type = packet_read(&plen);
1.43 markus 918: if (type == SSH_SMSG_SUCCESS) {
1.31 markus 919: interactive = 1;
1.45 markus 920: have_tty = 1;
1.43 markus 921: } else if (type == SSH_SMSG_FAILURE)
1.31 markus 922: log("Warning: Remote host failed or refused to allocate a pseudo tty.");
923: else
924: packet_disconnect("Protocol error waiting for pty request response.");
925: }
926: /* Request X11 forwarding if enabled and DISPLAY is set. */
927: if (options.forward_x11 && getenv("DISPLAY") != NULL) {
1.50 markus 928: char proto[512], data[512];
929: /* Get reasonable local authentication information. */
930: x11_get_proto(proto, sizeof proto, data, sizeof data);
931: /* Request forwarding with authentication spoofing. */
1.31 markus 932: debug("Requesting X11 forwarding with authentication spoofing.");
1.50 markus 933: x11_request_forwarding_with_spoofing(0, proto, data);
1.31 markus 934:
935: /* Read response from the server. */
936: type = packet_read(&plen);
937: if (type == SSH_SMSG_SUCCESS) {
938: interactive = 1;
1.50 markus 939: } else if (type == SSH_SMSG_FAILURE) {
1.31 markus 940: log("Warning: Remote host denied X11 forwarding.");
1.50 markus 941: } else {
1.31 markus 942: packet_disconnect("Protocol error waiting for X11 forwarding");
1.50 markus 943: }
1.31 markus 944: }
945: /* Tell the packet module whether this is an interactive session. */
1.80 markus 946: packet_set_interactive(interactive);
1.31 markus 947:
948: /* Request authentication agent forwarding if appropriate. */
1.70 markus 949: check_agent_present();
950:
1.31 markus 951: if (options.forward_agent) {
952: debug("Requesting authentication agent forwarding.");
953: auth_request_forwarding();
954:
955: /* Read response from the server. */
956: type = packet_read(&plen);
957: packet_integrity_check(plen, 0, type);
958: if (type != SSH_SMSG_SUCCESS)
959: log("Warning: Remote host denied authentication agent forwarding.");
960: }
961:
1.70 markus 962: /* Initiate port forwardings. */
963: ssh_init_forwarding();
1.34 markus 964:
965: /* If requested, let ssh continue in the background. */
1.48 markus 966: if (fork_after_authentication_flag)
1.34 markus 967: if (daemon(1, 1) < 0)
968: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 969:
1.33 markus 970: /*
971: * If a command was specified on the command line, execute the
972: * command now. Otherwise request the server to start a shell.
973: */
1.31 markus 974: if (buffer_len(&command) > 0) {
975: int len = buffer_len(&command);
976: if (len > 900)
977: len = 900;
978: debug("Sending command: %.*s", len, buffer_ptr(&command));
979: packet_start(SSH_CMSG_EXEC_CMD);
980: packet_put_string(buffer_ptr(&command), buffer_len(&command));
981: packet_send();
982: packet_write_wait();
983: } else {
984: debug("Requesting shell.");
985: packet_start(SSH_CMSG_EXEC_SHELL);
986: packet_send();
987: packet_write_wait();
988: }
989:
990: /* Enter the interactive session. */
1.119 stevesk 991: return client_loop(have_tty, tty_flag ?
992: options.escape_char : SSH_ESCAPECHAR_NONE, 0);
1.45 markus 993: }
994:
1.126 itojun 995: static void
1.89 markus 996: client_subsystem_reply(int type, int plen, void *ctxt)
997: {
998: int id, len;
999:
1000: id = packet_get_int();
1001: len = buffer_len(&command);
1.100 markus 1002: if (len > 900)
1003: len = 900;
1.89 markus 1004: packet_done();
1005: if (type == SSH2_MSG_CHANNEL_FAILURE)
1006: fatal("Request for subsystem '%.*s' failed on channel %d",
1007: len, buffer_ptr(&command), id);
1008: }
1009:
1.126 itojun 1010: static void
1.70 markus 1011: ssh_session2_callback(int id, void *arg)
1.45 markus 1012: {
1013: int len;
1.80 markus 1014: int interactive = 0;
1.115 stevesk 1015: struct termios tio;
1.80 markus 1016:
1.87 deraadt 1017: debug("client_init id %d arg %ld", id, (long)arg);
1.31 markus 1018:
1.45 markus 1019: if (tty_flag) {
1020: struct winsize ws;
1021: char *cp;
1022: cp = getenv("TERM");
1023: if (!cp)
1024: cp = "";
1025: /* Store window size in the packet. */
1026: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
1027: memset(&ws, 0, sizeof(ws));
1028:
1029: channel_request_start(id, "pty-req", 0);
1030: packet_put_cstring(cp);
1031: packet_put_int(ws.ws_col);
1032: packet_put_int(ws.ws_row);
1033: packet_put_int(ws.ws_xpixel);
1034: packet_put_int(ws.ws_ypixel);
1.115 stevesk 1035: tio = get_saved_tio();
1036: tty_make_modes(/*ignored*/ 0, &tio);
1.45 markus 1037: packet_send();
1.80 markus 1038: interactive = 1;
1.45 markus 1039: /* XXX wait for reply */
1040: }
1.50 markus 1041: if (options.forward_x11 &&
1042: getenv("DISPLAY") != NULL) {
1043: char proto[512], data[512];
1044: /* Get reasonable local authentication information. */
1045: x11_get_proto(proto, sizeof proto, data, sizeof data);
1046: /* Request forwarding with authentication spoofing. */
1047: debug("Requesting X11 forwarding with authentication spoofing.");
1048: x11_request_forwarding_with_spoofing(id, proto, data);
1.80 markus 1049: interactive = 1;
1.50 markus 1050: /* XXX wait for reply */
1051: }
1052:
1.70 markus 1053: check_agent_present();
1054: if (options.forward_agent) {
1055: debug("Requesting authentication agent forwarding.");
1056: channel_request_start(id, "auth-agent-req@openssh.com", 0);
1057: packet_send();
1058: }
1059:
1.45 markus 1060: len = buffer_len(&command);
1061: if (len > 0) {
1062: if (len > 900)
1063: len = 900;
1.85 djm 1064: if (subsystem_flag) {
1065: debug("Sending subsystem: %.*s", len, buffer_ptr(&command));
1.89 markus 1066: channel_request_start(id, "subsystem", /*want reply*/ 1);
1067: /* register callback for reply */
1068: /* XXX we asume that client_loop has already been called */
1069: dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &client_subsystem_reply);
1070: dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &client_subsystem_reply);
1.85 djm 1071: } else {
1072: debug("Sending command: %.*s", len, buffer_ptr(&command));
1073: channel_request_start(id, "exec", 0);
1074: }
1.100 markus 1075: packet_put_string(buffer_ptr(&command), buffer_len(&command));
1.45 markus 1076: packet_send();
1077: } else {
1078: channel_request(id, "shell", 0);
1079: }
1080: /* channel_callback(id, SSH2_MSG_OPEN_CONFIGMATION, client_init, 0); */
1.90 markus 1081:
1.45 markus 1082: /* register different callback, etc. XXX */
1.80 markus 1083: packet_set_interactive(interactive);
1.45 markus 1084: }
1085:
1.126 itojun 1086: static int
1.106 markus 1087: ssh_session2_command(void)
1.45 markus 1088: {
1.118 markus 1089: Channel *c;
1090: int window, packetmax, in, out, err;
1.60 markus 1091:
1.62 markus 1092: if (stdin_null_flag) {
1.93 itojun 1093: in = open(_PATH_DEVNULL, O_RDONLY);
1.62 markus 1094: } else {
1095: in = dup(STDIN_FILENO);
1096: }
1.60 markus 1097: out = dup(STDOUT_FILENO);
1098: err = dup(STDERR_FILENO);
1.45 markus 1099:
1100: if (in < 0 || out < 0 || err < 0)
1.62 markus 1101: fatal("dup() in/out/err failed");
1.45 markus 1102:
1.69 markus 1103: /* enable nonblocking unless tty */
1104: if (!isatty(in))
1105: set_nonblock(in);
1106: if (!isatty(out))
1107: set_nonblock(out);
1108: if (!isatty(err))
1109: set_nonblock(err);
1110:
1.65 markus 1111: window = CHAN_SES_WINDOW_DEFAULT;
1112: packetmax = CHAN_SES_PACKET_DEFAULT;
1113: if (!tty_flag) {
1.45 markus 1114: window *= 2;
1.65 markus 1115: packetmax *=2;
1.45 markus 1116: }
1.118 markus 1117: c = channel_new(
1.45 markus 1118: "session", SSH_CHANNEL_OPENING, in, out, err,
1.65 markus 1119: window, packetmax, CHAN_EXTENDED_WRITE,
1.69 markus 1120: xstrdup("client-session"), /*nonblock*/0);
1.118 markus 1121: if (c == NULL)
1122: fatal("ssh_session2_command: channel_new failed");
1.45 markus 1123:
1.118 markus 1124: debug3("ssh_session2_command: channel_new: %d", c->self);
1.106 markus 1125:
1.122 markus 1126: channel_send_open(c->self);
1.118 markus 1127: channel_register_callback(c->self, SSH2_MSG_CHANNEL_OPEN_CONFIRMATION,
1.70 markus 1128: ssh_session2_callback, (void *)0);
1.106 markus 1129:
1.118 markus 1130: return c->self;
1.106 markus 1131: }
1132:
1.126 itojun 1133: static int
1.106 markus 1134: ssh_session2(void)
1135: {
1136: int id;
1137:
1138: /* XXX should be pre-session */
1139: ssh_init_forwarding();
1140:
1141: id = no_shell_flag ? -1 : ssh_session2_command();
1142:
1143: /* If requested, let ssh continue in the background. */
1144: if (fork_after_authentication_flag)
1145: if (daemon(1, 1) < 0)
1146: fatal("daemon() failed: %.200s", strerror(errno));
1.31 markus 1147:
1.119 stevesk 1148: return client_loop(tty_flag, tty_flag ?
1149: options.escape_char : SSH_ESCAPECHAR_NONE, id);
1.72 markus 1150: }
1151:
1.126 itojun 1152: static void
1.104 markus 1153: load_public_identity_files(void)
1154: {
1155: char *filename;
1156: Key *public;
1.131 millert 1157: int i = 0;
1.104 markus 1158:
1.127 markus 1159: #ifdef SMARTCARD
1.133 markus 1160: if (options.smartcard_device != NULL &&
1.127 markus 1161: options.num_identity_files + 1 < SSH_MAX_IDENTITY_FILES &&
1.132 jakob 1162: (public = sc_get_key(options.smartcard_device)) != NULL ) {
1.127 markus 1163: Key *new;
1164:
1.131 millert 1165: if (options.num_identity_files + 2 > SSH_MAX_IDENTITY_FILES)
1166: options.num_identity_files = SSH_MAX_IDENTITY_FILES - 2;
1167: memmove(&options.identity_files[2], &options.identity_files[0],
1168: sizeof(char *) * options.num_identity_files);
1169: options.num_identity_files += 2;
1170: i = 2;
1171:
1.127 markus 1172: /* XXX ssh1 vs ssh2 */
1173: new = key_new(KEY_RSA);
1174: new->flags = KEY_FLAG_EXT;
1175: BN_copy(new->rsa->n, public->rsa->n);
1176: BN_copy(new->rsa->e, public->rsa->e);
1177: RSA_set_method(new->rsa, sc_get_engine());
1.131 millert 1178: options.identity_keys[0] = new;
1179: options.identity_files[0] = xstrdup("smartcard rsa key");;
1.127 markus 1180:
1181: new = key_new(KEY_RSA1);
1182: new->flags = KEY_FLAG_EXT;
1183: BN_copy(new->rsa->n, public->rsa->n);
1184: BN_copy(new->rsa->e, public->rsa->e);
1185: RSA_set_method(new->rsa, sc_get_engine());
1.131 millert 1186: options.identity_keys[1] = new;
1187: options.identity_files[1] = xstrdup("smartcard rsa1 key");
1.127 markus 1188:
1189: key_free(public);
1190: }
1.136 jakob 1191: #endif /* SMARTCARD */
1.131 millert 1192: for (; i < options.num_identity_files; i++) {
1193: filename = tilde_expand_filename(options.identity_files[i],
1194: original_real_uid);
1195: public = key_load_public(filename, NULL);
1196: debug("identity file %s type %d", filename,
1197: public ? public->type : -1);
1198: xfree(options.identity_files[i]);
1199: options.identity_files[i] = filename;
1200: options.identity_keys[i] = public;
1201: }
1.1 deraadt 1202: }
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