1 /* $OpenBSD: ssh-add.c,v 1.160 2021/04/03 06:18:41 djm Exp $ */
2 /*
3 * Author: Tatu Ylonen <[email protected]>
4 * Copyright (c) 1995 Tatu Ylonen <[email protected]>, Espoo, Finland
5 * All rights reserved
6 * Adds an identity to the authentication server, or removes an identity.
7 *
8 * As far as I am concerned, the code I have written for this software
9 * can be used freely for any purpose. Any derived versions of this
10 * software must be clearly marked as such, and if the derived work is
11 * incompatible with the protocol description in the RFC file, it must be
12 * called by a name other than "ssh" or "Secure Shell".
13 *
14 * SSH2 implementation,
15 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include "includes.h"
39
40 #include <sys/types.h>
41 #include <sys/stat.h>
42
43 #ifdef WITH_OPENSSL
44 # include <openssl/evp.h>
45 # include "openbsd-compat/openssl-compat.h"
46 #endif
47
48 #include <errno.h>
49 #include <fcntl.h>
50 #include <pwd.h>
51 #include <stdarg.h>
52 #include <stdio.h>
53 #include <stdlib.h>
54 #include <string.h>
55 #include <unistd.h>
56 #include <limits.h>
57
58 #include "xmalloc.h"
59 #include "ssh.h"
60 #include "log.h"
61 #include "sshkey.h"
62 #include "sshbuf.h"
63 #include "authfd.h"
64 #include "authfile.h"
65 #include "pathnames.h"
66 #include "misc.h"
67 #include "ssherr.h"
68 #include "digest.h"
69 #include "ssh-sk.h"
70 #include "sk-api.h"
71
72 /* argv0 */
73 extern char *__progname;
74
75 /* Default files to add */
76 static char *default_files[] = {
77 #ifdef WITH_OPENSSL
78 _PATH_SSH_CLIENT_ID_RSA,
79 _PATH_SSH_CLIENT_ID_DSA,
80 #ifdef OPENSSL_HAS_ECC
81 _PATH_SSH_CLIENT_ID_ECDSA,
82 _PATH_SSH_CLIENT_ID_ECDSA_SK,
83 #endif
84 #endif /* WITH_OPENSSL */
85 _PATH_SSH_CLIENT_ID_ED25519,
86 _PATH_SSH_CLIENT_ID_ED25519_SK,
87 _PATH_SSH_CLIENT_ID_XMSS,
88 NULL
89 };
90
91 static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
92
93 /* Default lifetime (0 == forever) */
94 static int lifetime = 0;
95
96 /* User has to confirm key use */
97 static int confirm = 0;
98
99 /* Maximum number of signatures (XMSS) */
100 static u_int maxsign = 0;
101 static u_int minleft = 0;
102
103 /* we keep a cache of one passphrase */
104 static char *pass = NULL;
105 static void
clear_pass(void)106 clear_pass(void)
107 {
108 if (pass) {
109 freezero(pass, strlen(pass));
110 pass = NULL;
111 }
112 }
113
114 static int
delete_one(int agent_fd,const struct sshkey * key,const char * comment,const char * path,int qflag)115 delete_one(int agent_fd, const struct sshkey *key, const char *comment,
116 const char *path, int qflag)
117 {
118 int r;
119
120 if ((r = ssh_remove_identity(agent_fd, key)) != 0) {
121 fprintf(stderr, "Could not remove identity \"%s\": %s\n",
122 path, ssh_err(r));
123 return r;
124 }
125 if (!qflag) {
126 fprintf(stderr, "Identity removed: %s %s (%s)\n", path,
127 sshkey_type(key), comment);
128 }
129 return 0;
130 }
131
132 static int
delete_stdin(int agent_fd,int qflag)133 delete_stdin(int agent_fd, int qflag)
134 {
135 char *line = NULL, *cp;
136 size_t linesize = 0;
137 struct sshkey *key = NULL;
138 int lnum = 0, r, ret = -1;
139
140 while (getline(&line, &linesize, stdin) != -1) {
141 lnum++;
142 sshkey_free(key);
143 key = NULL;
144 line[strcspn(line, "\n")] = '\0';
145 cp = line + strspn(line, " \t");
146 if (*cp == '#' || *cp == '\0')
147 continue;
148 if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
149 fatal_f("sshkey_new");
150 if ((r = sshkey_read(key, &cp)) != 0) {
151 error_r(r, "(stdin):%d: invalid key", lnum);
152 continue;
153 }
154 if (delete_one(agent_fd, key, cp, "(stdin)", qflag) == 0)
155 ret = 0;
156 }
157 sshkey_free(key);
158 free(line);
159 return ret;
160 }
161
162 static int
delete_file(int agent_fd,const char * filename,int key_only,int qflag)163 delete_file(int agent_fd, const char *filename, int key_only, int qflag)
164 {
165 struct sshkey *public, *cert = NULL;
166 char *certpath = NULL, *comment = NULL;
167 int r, ret = -1;
168
169 if (strcmp(filename, "-") == 0)
170 return delete_stdin(agent_fd, qflag);
171
172 if ((r = sshkey_load_public(filename, &public, &comment)) != 0) {
173 printf("Bad key file %s: %s\n", filename, ssh_err(r));
174 return -1;
175 }
176 if (delete_one(agent_fd, public, comment, filename, qflag) == 0)
177 ret = 0;
178
179 if (key_only)
180 goto out;
181
182 /* Now try to delete the corresponding certificate too */
183 free(comment);
184 comment = NULL;
185 xasprintf(&certpath, "%s-cert.pub", filename);
186 if ((r = sshkey_load_public(certpath, &cert, &comment)) != 0) {
187 if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT)
188 error_r(r, "Failed to load certificate \"%s\"", certpath);
189 goto out;
190 }
191
192 if (!sshkey_equal_public(cert, public))
193 fatal("Certificate %s does not match private key %s",
194 certpath, filename);
195
196 if (delete_one(agent_fd, cert, comment, certpath, qflag) == 0)
197 ret = 0;
198
199 out:
200 sshkey_free(cert);
201 sshkey_free(public);
202 free(certpath);
203 free(comment);
204
205 return ret;
206 }
207
208 /* Send a request to remove all identities. */
209 static int
delete_all(int agent_fd,int qflag)210 delete_all(int agent_fd, int qflag)
211 {
212 int ret = -1;
213
214 /*
215 * Since the agent might be forwarded, old or non-OpenSSH, when asked
216 * to remove all keys, attempt to remove both protocol v.1 and v.2
217 * keys.
218 */
219 if (ssh_remove_all_identities(agent_fd, 2) == 0)
220 ret = 0;
221 /* ignore error-code for ssh1 */
222 ssh_remove_all_identities(agent_fd, 1);
223
224 if (ret != 0)
225 fprintf(stderr, "Failed to remove all identities.\n");
226 else if (!qflag)
227 fprintf(stderr, "All identities removed.\n");
228
229 return ret;
230 }
231
232 static int
add_file(int agent_fd,const char * filename,int key_only,int qflag,const char * skprovider)233 add_file(int agent_fd, const char *filename, int key_only, int qflag,
234 const char *skprovider)
235 {
236 struct sshkey *private, *cert;
237 char *comment = NULL;
238 char msg[1024], *certpath = NULL;
239 int r, fd, ret = -1;
240 size_t i;
241 u_int32_t left;
242 struct sshbuf *keyblob;
243 struct ssh_identitylist *idlist;
244
245 if (strcmp(filename, "-") == 0) {
246 fd = STDIN_FILENO;
247 filename = "(stdin)";
248 } else if ((fd = open(filename, O_RDONLY)) == -1) {
249 perror(filename);
250 return -1;
251 }
252
253 /*
254 * Since we'll try to load a keyfile multiple times, permission errors
255 * will occur multiple times, so check perms first and bail if wrong.
256 */
257 if (fd != STDIN_FILENO) {
258 if (sshkey_perm_ok(fd, filename) != 0) {
259 close(fd);
260 return -1;
261 }
262 }
263 if ((r = sshbuf_load_fd(fd, &keyblob)) != 0) {
264 fprintf(stderr, "Error loading key \"%s\": %s\n",
265 filename, ssh_err(r));
266 sshbuf_free(keyblob);
267 close(fd);
268 return -1;
269 }
270 close(fd);
271
272 /* At first, try empty passphrase */
273 if ((r = sshkey_parse_private_fileblob(keyblob, "", &private,
274 &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
275 fprintf(stderr, "Error loading key \"%s\": %s\n",
276 filename, ssh_err(r));
277 goto fail_load;
278 }
279 /* try last */
280 if (private == NULL && pass != NULL) {
281 if ((r = sshkey_parse_private_fileblob(keyblob, pass, &private,
282 &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
283 fprintf(stderr, "Error loading key \"%s\": %s\n",
284 filename, ssh_err(r));
285 goto fail_load;
286 }
287 }
288 if (private == NULL) {
289 /* clear passphrase since it did not work */
290 clear_pass();
291 snprintf(msg, sizeof msg, "Enter passphrase for %s%s: ",
292 filename, confirm ? " (will confirm each use)" : "");
293 for (;;) {
294 pass = read_passphrase(msg, RP_ALLOW_STDIN);
295 if (strcmp(pass, "") == 0)
296 goto fail_load;
297 if ((r = sshkey_parse_private_fileblob(keyblob, pass,
298 &private, &comment)) == 0)
299 break;
300 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
301 fprintf(stderr,
302 "Error loading key \"%s\": %s\n",
303 filename, ssh_err(r));
304 fail_load:
305 clear_pass();
306 sshbuf_free(keyblob);
307 return -1;
308 }
309 clear_pass();
310 snprintf(msg, sizeof msg,
311 "Bad passphrase, try again for %s%s: ", filename,
312 confirm ? " (will confirm each use)" : "");
313 }
314 }
315 if (comment == NULL || *comment == '\0')
316 comment = xstrdup(filename);
317 sshbuf_free(keyblob);
318
319 /* For XMSS */
320 if ((r = sshkey_set_filename(private, filename)) != 0) {
321 fprintf(stderr, "Could not add filename to private key: %s (%s)\n",
322 filename, comment);
323 goto out;
324 }
325 if (maxsign && minleft &&
326 (r = ssh_fetch_identitylist(agent_fd, &idlist)) == 0) {
327 for (i = 0; i < idlist->nkeys; i++) {
328 if (!sshkey_equal_public(idlist->keys[i], private))
329 continue;
330 left = sshkey_signatures_left(idlist->keys[i]);
331 if (left < minleft) {
332 fprintf(stderr,
333 "Only %d signatures left.\n", left);
334 break;
335 }
336 fprintf(stderr, "Skipping update: ");
337 if (left == minleft) {
338 fprintf(stderr,
339 "required signatures left (%d).\n", left);
340 } else {
341 fprintf(stderr,
342 "more signatures left (%d) than"
343 " required (%d).\n", left, minleft);
344 }
345 ssh_free_identitylist(idlist);
346 goto out;
347 }
348 ssh_free_identitylist(idlist);
349 }
350
351 if (sshkey_is_sk(private)) {
352 if (skprovider == NULL) {
353 fprintf(stderr, "Cannot load FIDO key %s "
354 "without provider\n", filename);
355 goto out;
356 }
357 if ((private->sk_flags & SSH_SK_USER_VERIFICATION_REQD) != 0) {
358 fprintf(stderr, "FIDO verify-required key %s is not "
359 "currently supported by ssh-agent\n", filename);
360 goto out;
361 }
362 } else {
363 /* Don't send provider constraint for other keys */
364 skprovider = NULL;
365 }
366
367 if ((r = ssh_add_identity_constrained(agent_fd, private, comment,
368 lifetime, confirm, maxsign, skprovider)) == 0) {
369 ret = 0;
370 if (!qflag) {
371 fprintf(stderr, "Identity added: %s (%s)\n",
372 filename, comment);
373 if (lifetime != 0) {
374 fprintf(stderr,
375 "Lifetime set to %d seconds\n", lifetime);
376 }
377 if (confirm != 0) {
378 fprintf(stderr, "The user must confirm "
379 "each use of the key\n");
380 }
381 }
382 } else {
383 fprintf(stderr, "Could not add identity \"%s\": %s\n",
384 filename, ssh_err(r));
385 }
386
387 /* Skip trying to load the cert if requested */
388 if (key_only)
389 goto out;
390
391 /* Now try to add the certificate flavour too */
392 xasprintf(&certpath, "%s-cert.pub", filename);
393 if ((r = sshkey_load_public(certpath, &cert, NULL)) != 0) {
394 if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT)
395 error_r(r, "Failed to load certificate \"%s\"", certpath);
396 goto out;
397 }
398
399 if (!sshkey_equal_public(cert, private)) {
400 error("Certificate %s does not match private key %s",
401 certpath, filename);
402 sshkey_free(cert);
403 goto out;
404 }
405
406 /* Graft with private bits */
407 if ((r = sshkey_to_certified(private)) != 0) {
408 error_fr(r, "sshkey_to_certified");
409 sshkey_free(cert);
410 goto out;
411 }
412 if ((r = sshkey_cert_copy(cert, private)) != 0) {
413 error_fr(r, "sshkey_cert_copy");
414 sshkey_free(cert);
415 goto out;
416 }
417 sshkey_free(cert);
418
419 if ((r = ssh_add_identity_constrained(agent_fd, private, comment,
420 lifetime, confirm, maxsign, skprovider)) != 0) {
421 error_r(r, "Certificate %s (%s) add failed", certpath,
422 private->cert->key_id);
423 goto out;
424 }
425 /* success */
426 if (!qflag) {
427 fprintf(stderr, "Certificate added: %s (%s)\n", certpath,
428 private->cert->key_id);
429 if (lifetime != 0) {
430 fprintf(stderr, "Lifetime set to %d seconds\n",
431 lifetime);
432 }
433 if (confirm != 0) {
434 fprintf(stderr, "The user must confirm each use "
435 "of the key\n");
436 }
437 }
438
439 out:
440 free(certpath);
441 free(comment);
442 sshkey_free(private);
443
444 return ret;
445 }
446
447 static int
update_card(int agent_fd,int add,const char * id,int qflag)448 update_card(int agent_fd, int add, const char *id, int qflag)
449 {
450 char *pin = NULL;
451 int r, ret = -1;
452
453 if (add) {
454 if ((pin = read_passphrase("Enter passphrase for PKCS#11: ",
455 RP_ALLOW_STDIN)) == NULL)
456 return -1;
457 }
458
459 if ((r = ssh_update_card(agent_fd, add, id, pin == NULL ? "" : pin,
460 lifetime, confirm)) == 0) {
461 ret = 0;
462 if (!qflag) {
463 fprintf(stderr, "Card %s: %s\n",
464 add ? "added" : "removed", id);
465 }
466 } else {
467 fprintf(stderr, "Could not %s card \"%s\": %s\n",
468 add ? "add" : "remove", id, ssh_err(r));
469 ret = -1;
470 }
471 free(pin);
472 return ret;
473 }
474
475 static int
test_key(int agent_fd,const char * filename)476 test_key(int agent_fd, const char *filename)
477 {
478 struct sshkey *key = NULL;
479 u_char *sig = NULL;
480 size_t slen = 0;
481 int r, ret = -1;
482 char data[1024];
483
484 if ((r = sshkey_load_public(filename, &key, NULL)) != 0) {
485 error_r(r, "Couldn't read public key %s", filename);
486 return -1;
487 }
488 arc4random_buf(data, sizeof(data));
489 if ((r = ssh_agent_sign(agent_fd, key, &sig, &slen, data, sizeof(data),
490 NULL, 0)) != 0) {
491 error_r(r, "Agent signature failed for %s", filename);
492 goto done;
493 }
494 if ((r = sshkey_verify(key, sig, slen, data, sizeof(data),
495 NULL, 0, NULL)) != 0) {
496 error_r(r, "Signature verification failed for %s", filename);
497 goto done;
498 }
499 /* success */
500 ret = 0;
501 done:
502 free(sig);
503 sshkey_free(key);
504 return ret;
505 }
506
507 static int
list_identities(int agent_fd,int do_fp)508 list_identities(int agent_fd, int do_fp)
509 {
510 char *fp;
511 int r;
512 struct ssh_identitylist *idlist;
513 u_int32_t left;
514 size_t i;
515
516 if ((r = ssh_fetch_identitylist(agent_fd, &idlist)) != 0) {
517 if (r != SSH_ERR_AGENT_NO_IDENTITIES)
518 fprintf(stderr, "error fetching identities: %s\n",
519 ssh_err(r));
520 else
521 printf("The agent has no identities.\n");
522 return -1;
523 }
524 for (i = 0; i < idlist->nkeys; i++) {
525 if (do_fp) {
526 fp = sshkey_fingerprint(idlist->keys[i],
527 fingerprint_hash, SSH_FP_DEFAULT);
528 printf("%u %s %s (%s)\n", sshkey_size(idlist->keys[i]),
529 fp == NULL ? "(null)" : fp, idlist->comments[i],
530 sshkey_type(idlist->keys[i]));
531 free(fp);
532 } else {
533 if ((r = sshkey_write(idlist->keys[i], stdout)) != 0) {
534 fprintf(stderr, "sshkey_write: %s\n",
535 ssh_err(r));
536 continue;
537 }
538 fprintf(stdout, " %s", idlist->comments[i]);
539 left = sshkey_signatures_left(idlist->keys[i]);
540 if (left > 0)
541 fprintf(stdout,
542 " [signatures left %d]", left);
543 fprintf(stdout, "\n");
544 }
545 }
546 ssh_free_identitylist(idlist);
547 return 0;
548 }
549
550 static int
lock_agent(int agent_fd,int lock)551 lock_agent(int agent_fd, int lock)
552 {
553 char prompt[100], *p1, *p2;
554 int r, passok = 1, ret = -1;
555
556 strlcpy(prompt, "Enter lock password: ", sizeof(prompt));
557 p1 = read_passphrase(prompt, RP_ALLOW_STDIN);
558 if (lock) {
559 strlcpy(prompt, "Again: ", sizeof prompt);
560 p2 = read_passphrase(prompt, RP_ALLOW_STDIN);
561 if (strcmp(p1, p2) != 0) {
562 fprintf(stderr, "Passwords do not match.\n");
563 passok = 0;
564 }
565 freezero(p2, strlen(p2));
566 }
567 if (passok) {
568 if ((r = ssh_lock_agent(agent_fd, lock, p1)) == 0) {
569 fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un");
570 ret = 0;
571 } else {
572 fprintf(stderr, "Failed to %slock agent: %s\n",
573 lock ? "" : "un", ssh_err(r));
574 }
575 }
576 freezero(p1, strlen(p1));
577 return (ret);
578 }
579
580 static int
load_resident_keys(int agent_fd,const char * skprovider,int qflag)581 load_resident_keys(int agent_fd, const char *skprovider, int qflag)
582 {
583 struct sshkey **keys;
584 size_t nkeys, i;
585 int r, ok = 0;
586 char *fp;
587
588 pass = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN);
589 if ((r = sshsk_load_resident(skprovider, NULL, pass,
590 &keys, &nkeys)) != 0) {
591 error_r(r, "Unable to load resident keys");
592 return r;
593 }
594 for (i = 0; i < nkeys; i++) {
595 if ((fp = sshkey_fingerprint(keys[i],
596 fingerprint_hash, SSH_FP_DEFAULT)) == NULL)
597 fatal_f("sshkey_fingerprint failed");
598 if ((r = ssh_add_identity_constrained(agent_fd, keys[i], "",
599 lifetime, confirm, maxsign, skprovider)) != 0) {
600 error("Unable to add key %s %s",
601 sshkey_type(keys[i]), fp);
602 free(fp);
603 ok = r;
604 continue;
605 }
606 if (ok == 0)
607 ok = 1;
608 if (!qflag) {
609 fprintf(stderr, "Resident identity added: %s %s\n",
610 sshkey_type(keys[i]), fp);
611 if (lifetime != 0) {
612 fprintf(stderr,
613 "Lifetime set to %d seconds\n", lifetime);
614 }
615 if (confirm != 0) {
616 fprintf(stderr, "The user must confirm "
617 "each use of the key\n");
618 }
619 }
620 free(fp);
621 sshkey_free(keys[i]);
622 }
623 free(keys);
624 if (nkeys == 0)
625 return SSH_ERR_KEY_NOT_FOUND;
626 return ok == 1 ? 0 : ok;
627 }
628
629 static int
do_file(int agent_fd,int deleting,int key_only,char * file,int qflag,const char * skprovider)630 do_file(int agent_fd, int deleting, int key_only, char *file, int qflag,
631 const char *skprovider)
632 {
633 if (deleting) {
634 if (delete_file(agent_fd, file, key_only, qflag) == -1)
635 return -1;
636 } else {
637 if (add_file(agent_fd, file, key_only, qflag, skprovider) == -1)
638 return -1;
639 }
640 return 0;
641 }
642
643 static void
usage(void)644 usage(void)
645 {
646 fprintf(stderr,
647 "usage: ssh-add [-cDdKkLlqvXx] [-E fingerprint_hash] [-S provider] [-t life]\n"
648 #ifdef WITH_XMSS
649 " [-M maxsign] [-m minleft]\n"
650 #endif
651 " [file ...]\n"
652 " ssh-add -s pkcs11\n"
653 " ssh-add -e pkcs11\n"
654 " ssh-add -T pubkey ...\n"
655 );
656 }
657
658 int
main(int argc,char ** argv)659 main(int argc, char **argv)
660 {
661 extern char *optarg;
662 extern int optind;
663 int agent_fd;
664 char *pkcs11provider = NULL, *skprovider = NULL;
665 int r, i, ch, deleting = 0, ret = 0, key_only = 0, do_download = 0;
666 int xflag = 0, lflag = 0, Dflag = 0, qflag = 0, Tflag = 0;
667 SyslogFacility log_facility = SYSLOG_FACILITY_AUTH;
668 LogLevel log_level = SYSLOG_LEVEL_INFO;
669
670 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
671 sanitise_stdfd();
672
673 __progname = ssh_get_progname(argv[0]);
674 seed_rng();
675
676 log_init(__progname, log_level, log_facility, 1);
677
678 setvbuf(stdout, NULL, _IOLBF, 0);
679
680 /* First, get a connection to the authentication agent. */
681 switch (r = ssh_get_authentication_socket(&agent_fd)) {
682 case 0:
683 break;
684 case SSH_ERR_AGENT_NOT_PRESENT:
685 fprintf(stderr, "Could not open a connection to your "
686 "authentication agent.\n");
687 exit(2);
688 default:
689 fprintf(stderr, "Error connecting to agent: %s\n", ssh_err(r));
690 exit(2);
691 }
692
693 skprovider = getenv("SSH_SK_PROVIDER");
694
695 while ((ch = getopt(argc, argv, "vkKlLcdDTxXE:e:M:m:qs:S:t:")) != -1) {
696 switch (ch) {
697 case 'v':
698 if (log_level == SYSLOG_LEVEL_INFO)
699 log_level = SYSLOG_LEVEL_DEBUG1;
700 else if (log_level < SYSLOG_LEVEL_DEBUG3)
701 log_level++;
702 break;
703 case 'E':
704 fingerprint_hash = ssh_digest_alg_by_name(optarg);
705 if (fingerprint_hash == -1)
706 fatal("Invalid hash algorithm \"%s\"", optarg);
707 break;
708 case 'k':
709 key_only = 1;
710 break;
711 case 'K':
712 do_download = 1;
713 break;
714 case 'l':
715 case 'L':
716 if (lflag != 0)
717 fatal("-%c flag already specified", lflag);
718 lflag = ch;
719 break;
720 case 'x':
721 case 'X':
722 if (xflag != 0)
723 fatal("-%c flag already specified", xflag);
724 xflag = ch;
725 break;
726 case 'c':
727 confirm = 1;
728 break;
729 case 'm':
730 minleft = (int)strtonum(optarg, 1, UINT_MAX, NULL);
731 if (minleft == 0) {
732 usage();
733 ret = 1;
734 goto done;
735 }
736 break;
737 case 'M':
738 maxsign = (int)strtonum(optarg, 1, UINT_MAX, NULL);
739 if (maxsign == 0) {
740 usage();
741 ret = 1;
742 goto done;
743 }
744 break;
745 case 'd':
746 deleting = 1;
747 break;
748 case 'D':
749 Dflag = 1;
750 break;
751 case 's':
752 pkcs11provider = optarg;
753 break;
754 case 'S':
755 skprovider = optarg;
756 break;
757 case 'e':
758 deleting = 1;
759 pkcs11provider = optarg;
760 break;
761 case 't':
762 if ((lifetime = convtime(optarg)) == -1 ||
763 lifetime < 0 || (u_long)lifetime > UINT32_MAX) {
764 fprintf(stderr, "Invalid lifetime\n");
765 ret = 1;
766 goto done;
767 }
768 break;
769 case 'q':
770 qflag = 1;
771 break;
772 case 'T':
773 Tflag = 1;
774 break;
775 default:
776 usage();
777 ret = 1;
778 goto done;
779 }
780 }
781 log_init(__progname, log_level, log_facility, 1);
782
783 if ((xflag != 0) + (lflag != 0) + (Dflag != 0) > 1)
784 fatal("Invalid combination of actions");
785 else if (xflag) {
786 if (lock_agent(agent_fd, xflag == 'x' ? 1 : 0) == -1)
787 ret = 1;
788 goto done;
789 } else if (lflag) {
790 if (list_identities(agent_fd, lflag == 'l' ? 1 : 0) == -1)
791 ret = 1;
792 goto done;
793 } else if (Dflag) {
794 if (delete_all(agent_fd, qflag) == -1)
795 ret = 1;
796 goto done;
797 }
798
799 #ifdef ENABLE_SK_INTERNAL
800 if (skprovider == NULL)
801 skprovider = "internal";
802 #endif
803
804 argc -= optind;
805 argv += optind;
806 if (Tflag) {
807 if (argc <= 0)
808 fatal("no keys to test");
809 for (r = i = 0; i < argc; i++)
810 r |= test_key(agent_fd, argv[i]);
811 ret = r == 0 ? 0 : 1;
812 goto done;
813 }
814 if (pkcs11provider != NULL) {
815 if (update_card(agent_fd, !deleting, pkcs11provider,
816 qflag) == -1)
817 ret = 1;
818 goto done;
819 }
820 if (do_download) {
821 if (skprovider == NULL)
822 fatal("Cannot download keys without provider");
823 if (load_resident_keys(agent_fd, skprovider, qflag) != 0)
824 ret = 1;
825 goto done;
826 }
827 if (argc == 0) {
828 char buf[PATH_MAX];
829 struct passwd *pw;
830 struct stat st;
831 int count = 0;
832
833 if ((pw = getpwuid(getuid())) == NULL) {
834 fprintf(stderr, "No user found with uid %u\n",
835 (u_int)getuid());
836 ret = 1;
837 goto done;
838 }
839
840 for (i = 0; default_files[i]; i++) {
841 snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir,
842 default_files[i]);
843 if (stat(buf, &st) == -1)
844 continue;
845 if (do_file(agent_fd, deleting, key_only, buf,
846 qflag, skprovider) == -1)
847 ret = 1;
848 else
849 count++;
850 }
851 if (count == 0)
852 ret = 1;
853 } else {
854 for (i = 0; i < argc; i++) {
855 if (do_file(agent_fd, deleting, key_only,
856 argv[i], qflag, skprovider) == -1)
857 ret = 1;
858 }
859 }
860 done:
861 clear_pass();
862 ssh_close_authentication_socket(agent_fd);
863 return ret;
864 }
865