1 /* $NetBSD: ssh-add.c,v 1.22 2020/05/28 17:05:49 christos Exp $ */ 2 /* $OpenBSD: ssh-add.c,v 1.155 2020/03/16 02:17:02 dtucker Exp $ */ 3 /* 4 * Author: Tatu Ylonen <ylo@cs.hut.fi> 5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 6 * All rights reserved 7 * Adds an identity to the authentication server, or removes an identity. 8 * 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 * SSH2 implementation, 16 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 28 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 29 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 31 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 32 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 36 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include "includes.h" 40 __RCSID("$NetBSD: ssh-add.c,v 1.22 2020/05/28 17:05:49 christos Exp $"); 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 44 #ifdef WITH_OPENSSL 45 #include <openssl/evp.h> 46 #endif 47 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <pwd.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <stdarg.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 71 /* argv0 */ 72 extern char *__progname; 73 74 /* Default files to add */ 75 static const char *default_files[] = { 76 _PATH_SSH_CLIENT_ID_RSA, 77 _PATH_SSH_CLIENT_ID_DSA, 78 _PATH_SSH_CLIENT_ID_ECDSA, 79 _PATH_SSH_CLIENT_ID_ECDSA_SK, 80 _PATH_SSH_CLIENT_ID_ED25519, 81 _PATH_SSH_CLIENT_ID_ED25519_SK, 82 _PATH_SSH_CLIENT_ID_XMSS, 83 NULL 84 }; 85 86 static int fingerprint_hash = SSH_FP_HASH_DEFAULT; 87 88 /* Default lifetime (0 == forever) */ 89 static long lifetime = 0; 90 91 /* User has to confirm key use */ 92 static int confirm = 0; 93 94 /* Maximum number of signatures (XMSS) */ 95 static u_int maxsign = 0; 96 static u_int minleft = 0; 97 98 /* we keep a cache of one passphrase */ 99 static char *pass = NULL; 100 static void 101 clear_pass(void) 102 { 103 if (pass) { 104 freezero(pass, strlen(pass)); 105 pass = NULL; 106 } 107 } 108 109 static int 110 delete_file(int agent_fd, const char *filename, int key_only, int qflag) 111 { 112 struct sshkey *public, *cert = NULL; 113 char *certpath = NULL, *comment = NULL; 114 int r, ret = -1; 115 116 if ((r = sshkey_load_public(filename, &public, &comment)) != 0) { 117 printf("Bad key file %s: %s\n", filename, ssh_err(r)); 118 return -1; 119 } 120 if ((r = ssh_remove_identity(agent_fd, public)) == 0) { 121 if (!qflag) { 122 fprintf(stderr, "Identity removed: %s (%s)\n", 123 filename, comment); 124 } 125 ret = 0; 126 } else 127 fprintf(stderr, "Could not remove identity \"%s\": %s\n", 128 filename, ssh_err(r)); 129 130 if (key_only) 131 goto out; 132 133 /* Now try to delete the corresponding certificate too */ 134 free(comment); 135 comment = NULL; 136 xasprintf(&certpath, "%s-cert.pub", filename); 137 if ((r = sshkey_load_public(certpath, &cert, &comment)) != 0) { 138 if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT) 139 error("Failed to load certificate \"%s\": %s", 140 certpath, ssh_err(r)); 141 goto out; 142 } 143 144 if (!sshkey_equal_public(cert, public)) 145 fatal("Certificate %s does not match private key %s", 146 certpath, filename); 147 148 if ((r = ssh_remove_identity(agent_fd, cert)) == 0) { 149 if (!qflag) { 150 fprintf(stderr, "Identity removed: %s (%s)\n", 151 certpath, comment); 152 } 153 ret = 0; 154 } else 155 fprintf(stderr, "Could not remove identity \"%s\": %s\n", 156 certpath, ssh_err(r)); 157 158 out: 159 sshkey_free(cert); 160 sshkey_free(public); 161 free(certpath); 162 free(comment); 163 164 return ret; 165 } 166 167 /* Send a request to remove all identities. */ 168 static int 169 delete_all(int agent_fd, int qflag) 170 { 171 int ret = -1; 172 173 /* 174 * Since the agent might be forwarded, old or non-OpenSSH, when asked 175 * to remove all keys, attempt to remove both protocol v.1 and v.2 176 * keys. 177 */ 178 if (ssh_remove_all_identities(agent_fd, 2) == 0) 179 ret = 0; 180 /* ignore error-code for ssh1 */ 181 ssh_remove_all_identities(agent_fd, 1); 182 183 if (ret != 0) 184 fprintf(stderr, "Failed to remove all identities.\n"); 185 else if (!qflag) 186 fprintf(stderr, "All identities removed.\n"); 187 188 return ret; 189 } 190 191 static int 192 add_file(int agent_fd, const char *filename, int key_only, int qflag, 193 const char *skprovider) 194 { 195 struct sshkey *private, *cert; 196 char *comment = NULL; 197 char msg[1024], *certpath = NULL; 198 int r, fd, ret = -1; 199 size_t i; 200 u_int32_t left; 201 struct sshbuf *keyblob; 202 struct ssh_identitylist *idlist; 203 204 if (strcmp(filename, "-") == 0) { 205 fd = STDIN_FILENO; 206 filename = "(stdin)"; 207 } else if ((fd = open(filename, O_RDONLY)) == -1) { 208 perror(filename); 209 return -1; 210 } 211 212 /* 213 * Since we'll try to load a keyfile multiple times, permission errors 214 * will occur multiple times, so check perms first and bail if wrong. 215 */ 216 if (fd != STDIN_FILENO) { 217 if (sshkey_perm_ok(fd, filename) != 0) { 218 close(fd); 219 return -1; 220 } 221 } 222 if ((r = sshbuf_load_fd(fd, &keyblob)) != 0) { 223 fprintf(stderr, "Error loading key \"%s\": %s\n", 224 filename, ssh_err(r)); 225 sshbuf_free(keyblob); 226 close(fd); 227 return -1; 228 } 229 close(fd); 230 231 /* At first, try empty passphrase */ 232 if ((r = sshkey_parse_private_fileblob(keyblob, "", &private, 233 &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) { 234 fprintf(stderr, "Error loading key \"%s\": %s\n", 235 filename, ssh_err(r)); 236 goto fail_load; 237 } 238 /* try last */ 239 if (private == NULL && pass != NULL) { 240 if ((r = sshkey_parse_private_fileblob(keyblob, pass, &private, 241 &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) { 242 fprintf(stderr, "Error loading key \"%s\": %s\n", 243 filename, ssh_err(r)); 244 goto fail_load; 245 } 246 } 247 if (private == NULL) { 248 /* clear passphrase since it did not work */ 249 clear_pass(); 250 snprintf(msg, sizeof msg, "Enter passphrase for %s%s: ", 251 filename, confirm ? " (will confirm each use)" : ""); 252 for (;;) { 253 pass = read_passphrase(msg, RP_ALLOW_STDIN); 254 if (strcmp(pass, "") == 0) 255 goto fail_load; 256 if ((r = sshkey_parse_private_fileblob(keyblob, pass, 257 &private, &comment)) == 0) 258 break; 259 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) { 260 fprintf(stderr, 261 "Error loading key \"%s\": %s\n", 262 filename, ssh_err(r)); 263 fail_load: 264 clear_pass(); 265 sshbuf_free(keyblob); 266 return -1; 267 } 268 clear_pass(); 269 snprintf(msg, sizeof msg, 270 "Bad passphrase, try again for %s%s: ", filename, 271 confirm ? " (will confirm each use)" : ""); 272 } 273 } 274 if (comment == NULL || *comment == '\0') 275 comment = xstrdup(filename); 276 sshbuf_free(keyblob); 277 278 /* For XMSS */ 279 if ((r = sshkey_set_filename(private, filename)) != 0) { 280 fprintf(stderr, "Could not add filename to private key: %s (%s)\n", 281 filename, comment); 282 goto out; 283 } 284 if (maxsign && minleft && 285 (r = ssh_fetch_identitylist(agent_fd, &idlist)) == 0) { 286 for (i = 0; i < idlist->nkeys; i++) { 287 if (!sshkey_equal_public(idlist->keys[i], private)) 288 continue; 289 left = sshkey_signatures_left(idlist->keys[i]); 290 if (left < minleft) { 291 fprintf(stderr, 292 "Only %d signatures left.\n", left); 293 break; 294 } 295 fprintf(stderr, "Skipping update: "); 296 if (left == minleft) { 297 fprintf(stderr, 298 "required signatures left (%d).\n", left); 299 } else { 300 fprintf(stderr, 301 "more signatures left (%d) than" 302 " required (%d).\n", left, minleft); 303 } 304 ssh_free_identitylist(idlist); 305 goto out; 306 } 307 ssh_free_identitylist(idlist); 308 } 309 310 if (!sshkey_is_sk(private)) 311 skprovider = NULL; /* Don't send constraint for other keys */ 312 else if (skprovider == NULL) { 313 fprintf(stderr, "Cannot load authenticator-hosted key %s " 314 "without provider\n", filename); 315 goto out; 316 } 317 318 if ((r = ssh_add_identity_constrained(agent_fd, private, comment, 319 lifetime, confirm, maxsign, skprovider)) == 0) { 320 ret = 0; 321 if (!qflag) { 322 fprintf(stderr, "Identity added: %s (%s)\n", 323 filename, comment); 324 if (lifetime != 0) { 325 fprintf(stderr, 326 "Lifetime set to %ld seconds\n", lifetime); 327 } 328 if (confirm != 0) { 329 fprintf(stderr, "The user must confirm " 330 "each use of the key\n"); 331 } 332 } 333 } else { 334 fprintf(stderr, "Could not add identity \"%s\": %s\n", 335 filename, ssh_err(r)); 336 } 337 338 /* Skip trying to load the cert if requested */ 339 if (key_only) 340 goto out; 341 342 /* Now try to add the certificate flavour too */ 343 xasprintf(&certpath, "%s-cert.pub", filename); 344 if ((r = sshkey_load_public(certpath, &cert, NULL)) != 0) { 345 if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT) 346 error("Failed to load certificate \"%s\": %s", 347 certpath, ssh_err(r)); 348 goto out; 349 } 350 351 if (!sshkey_equal_public(cert, private)) { 352 error("Certificate %s does not match private key %s", 353 certpath, filename); 354 sshkey_free(cert); 355 goto out; 356 } 357 358 /* Graft with private bits */ 359 if ((r = sshkey_to_certified(private)) != 0) { 360 error("%s: sshkey_to_certified: %s", __func__, ssh_err(r)); 361 sshkey_free(cert); 362 goto out; 363 } 364 if ((r = sshkey_cert_copy(cert, private)) != 0) { 365 error("%s: sshkey_cert_copy: %s", __func__, ssh_err(r)); 366 sshkey_free(cert); 367 goto out; 368 } 369 sshkey_free(cert); 370 371 if ((r = ssh_add_identity_constrained(agent_fd, private, comment, 372 lifetime, confirm, maxsign, skprovider)) != 0) { 373 error("Certificate %s (%s) add failed: %s", certpath, 374 private->cert->key_id, ssh_err(r)); 375 goto out; 376 } 377 /* success */ 378 if (!qflag) { 379 fprintf(stderr, "Certificate added: %s (%s)\n", certpath, 380 private->cert->key_id); 381 if (lifetime != 0) { 382 fprintf(stderr, "Lifetime set to %ld seconds\n", 383 lifetime); 384 } 385 if (confirm != 0) { 386 fprintf(stderr, "The user must confirm each use " 387 "of the key\n"); 388 } 389 } 390 391 out: 392 free(certpath); 393 free(comment); 394 sshkey_free(private); 395 396 return ret; 397 } 398 399 static int 400 update_card(int agent_fd, int add, const char *id, int qflag) 401 { 402 char *pin = NULL; 403 int r, ret = -1; 404 405 if (add) { 406 if ((pin = read_passphrase("Enter passphrase for PKCS#11: ", 407 RP_ALLOW_STDIN)) == NULL) 408 return -1; 409 } 410 411 if ((r = ssh_update_card(agent_fd, add, id, pin == NULL ? "" : pin, 412 lifetime, confirm)) == 0) { 413 ret = 0; 414 if (!qflag) { 415 fprintf(stderr, "Card %s: %s\n", 416 add ? "added" : "removed", id); 417 } 418 } else { 419 fprintf(stderr, "Could not %s card \"%s\": %s\n", 420 add ? "add" : "remove", id, ssh_err(r)); 421 ret = -1; 422 } 423 free(pin); 424 return ret; 425 } 426 427 static int 428 test_key(int agent_fd, const char *filename) 429 { 430 struct sshkey *key = NULL; 431 u_char *sig = NULL; 432 size_t slen = 0; 433 int r, ret = -1; 434 u_char data[1024]; 435 436 if ((r = sshkey_load_public(filename, &key, NULL)) != 0) { 437 error("Couldn't read public key %s: %s", filename, ssh_err(r)); 438 return -1; 439 } 440 arc4random_buf(data, sizeof(data)); 441 if ((r = ssh_agent_sign(agent_fd, key, &sig, &slen, data, sizeof(data), 442 NULL, 0)) != 0) { 443 error("Agent signature failed for %s: %s", 444 filename, ssh_err(r)); 445 goto done; 446 } 447 if ((r = sshkey_verify(key, sig, slen, data, sizeof(data), 448 NULL, 0, NULL)) != 0) { 449 error("Signature verification failed for %s: %s", 450 filename, ssh_err(r)); 451 goto done; 452 } 453 /* success */ 454 ret = 0; 455 done: 456 free(sig); 457 sshkey_free(key); 458 return ret; 459 } 460 461 static int 462 list_identities(int agent_fd, int do_fp) 463 { 464 char *fp; 465 int r; 466 struct ssh_identitylist *idlist; 467 u_int32_t left; 468 size_t i; 469 470 if ((r = ssh_fetch_identitylist(agent_fd, &idlist)) != 0) { 471 if (r != SSH_ERR_AGENT_NO_IDENTITIES) 472 fprintf(stderr, "error fetching identities: %s\n", 473 ssh_err(r)); 474 else 475 printf("The agent has no identities.\n"); 476 return -1; 477 } 478 for (i = 0; i < idlist->nkeys; i++) { 479 if (do_fp) { 480 fp = sshkey_fingerprint(idlist->keys[i], 481 fingerprint_hash, SSH_FP_DEFAULT); 482 printf("%u %s %s (%s)\n", sshkey_size(idlist->keys[i]), 483 fp == NULL ? "(null)" : fp, idlist->comments[i], 484 sshkey_type(idlist->keys[i])); 485 free(fp); 486 } else { 487 if ((r = sshkey_write(idlist->keys[i], stdout)) != 0) { 488 fprintf(stderr, "sshkey_write: %s\n", 489 ssh_err(r)); 490 continue; 491 } 492 fprintf(stdout, " %s", idlist->comments[i]); 493 left = sshkey_signatures_left(idlist->keys[i]); 494 if (left > 0) 495 fprintf(stdout, 496 " [signatures left %d]", left); 497 fprintf(stdout, "\n"); 498 } 499 } 500 ssh_free_identitylist(idlist); 501 return 0; 502 } 503 504 static int 505 lock_agent(int agent_fd, int lock) 506 { 507 char prompt[100], *p1, *p2; 508 int r, passok = 1, ret = -1; 509 510 strlcpy(prompt, "Enter lock password: ", sizeof(prompt)); 511 p1 = read_passphrase(prompt, RP_ALLOW_STDIN); 512 if (lock) { 513 strlcpy(prompt, "Again: ", sizeof prompt); 514 p2 = read_passphrase(prompt, RP_ALLOW_STDIN); 515 if (strcmp(p1, p2) != 0) { 516 fprintf(stderr, "Passwords do not match.\n"); 517 passok = 0; 518 } 519 freezero(p2, strlen(p2)); 520 } 521 if (passok) { 522 if ((r = ssh_lock_agent(agent_fd, lock, p1)) == 0) { 523 fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un"); 524 ret = 0; 525 } else { 526 fprintf(stderr, "Failed to %slock agent: %s\n", 527 lock ? "" : "un", ssh_err(r)); 528 } 529 } 530 freezero(p1, strlen(p1)); 531 return (ret); 532 } 533 534 static int 535 load_resident_keys(int agent_fd, const char *skprovider, int qflag) 536 { 537 struct sshkey **keys; 538 size_t nkeys, i; 539 int r, ok = 0; 540 char *fp; 541 542 pass = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN); 543 if ((r = sshsk_load_resident(skprovider, NULL, pass, 544 &keys, &nkeys)) != 0) { 545 error("Unable to load resident keys: %s", ssh_err(r)); 546 return r; 547 } 548 for (i = 0; i < nkeys; i++) { 549 if ((fp = sshkey_fingerprint(keys[i], 550 fingerprint_hash, SSH_FP_DEFAULT)) == NULL) 551 fatal("%s: sshkey_fingerprint failed", __func__); 552 if ((r = ssh_add_identity_constrained(agent_fd, keys[i], "", 553 lifetime, confirm, maxsign, skprovider)) != 0) { 554 error("Unable to add key %s %s", 555 sshkey_type(keys[i]), fp); 556 free(fp); 557 ok = r; 558 continue; 559 } 560 if (ok == 0) 561 ok = 1; 562 if (!qflag) { 563 fprintf(stderr, "Resident identity added: %s %s\n", 564 sshkey_type(keys[i]), fp); 565 if (lifetime != 0) { 566 fprintf(stderr, 567 "Lifetime set to %ld seconds\n", lifetime); 568 } 569 if (confirm != 0) { 570 fprintf(stderr, "The user must confirm " 571 "each use of the key\n"); 572 } 573 } 574 free(fp); 575 sshkey_free(keys[i]); 576 } 577 free(keys); 578 if (nkeys == 0) 579 return SSH_ERR_KEY_NOT_FOUND; 580 return ok == 1 ? 0 : ok; 581 } 582 583 static int 584 do_file(int agent_fd, int deleting, int key_only, char *file, int qflag, 585 const char *skprovider) 586 { 587 if (deleting) { 588 if (delete_file(agent_fd, file, key_only, qflag) == -1) 589 return -1; 590 } else { 591 if (add_file(agent_fd, file, key_only, qflag, skprovider) == -1) 592 return -1; 593 } 594 return 0; 595 } 596 597 static void 598 usage(void) 599 { 600 fprintf(stderr, 601 "usage: ssh-add [-cDdKkLlqvXx] [-E fingerprint_hash] [-S provider] [-t life]\n" 602 #ifdef WITH_XMSS 603 " [-M maxsign] [-m minleft]\n" 604 #endif 605 " [file ...]\n" 606 " ssh-add -s pkcs11\n" 607 " ssh-add -e pkcs11\n" 608 " ssh-add -T pubkey ...\n" 609 ); 610 } 611 612 int 613 main(int argc, char **argv) 614 { 615 extern char *optarg; 616 extern int optind; 617 int agent_fd; 618 char *pkcs11provider = NULL; 619 const char *skprovider = NULL; 620 int r, i, ch, deleting = 0, ret = 0, key_only = 0, do_download = 0; 621 int xflag = 0, lflag = 0, Dflag = 0, qflag = 0, Tflag = 0; 622 SyslogFacility log_facility = SYSLOG_FACILITY_AUTH; 623 LogLevel log_level = SYSLOG_LEVEL_INFO; 624 625 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 626 sanitise_stdfd(); 627 628 #ifdef WITH_OPENSSL 629 OpenSSL_add_all_algorithms(); 630 #endif 631 log_init(__progname, log_level, log_facility, 1); 632 633 setvbuf(stdout, NULL, _IOLBF, 0); 634 635 /* First, get a connection to the authentication agent. */ 636 switch (r = ssh_get_authentication_socket(&agent_fd)) { 637 case 0: 638 break; 639 case SSH_ERR_AGENT_NOT_PRESENT: 640 fprintf(stderr, "Could not open a connection to your " 641 "authentication agent.\n"); 642 exit(2); 643 default: 644 fprintf(stderr, "Error connecting to agent: %s\n", ssh_err(r)); 645 exit(2); 646 } 647 648 skprovider = getenv("SSH_SK_PROVIDER"); 649 650 while ((ch = getopt(argc, argv, "vkKlLcdDTxXE:e:M:m:qs:S:t:")) != -1) { 651 switch (ch) { 652 case 'v': 653 if (log_level == SYSLOG_LEVEL_INFO) 654 log_level = SYSLOG_LEVEL_DEBUG1; 655 else if (log_level < SYSLOG_LEVEL_DEBUG3) 656 log_level++; 657 break; 658 case 'E': 659 fingerprint_hash = ssh_digest_alg_by_name(optarg); 660 if (fingerprint_hash == -1) 661 fatal("Invalid hash algorithm \"%s\"", optarg); 662 break; 663 case 'k': 664 key_only = 1; 665 break; 666 case 'K': 667 do_download = 1; 668 break; 669 case 'l': 670 case 'L': 671 if (lflag != 0) 672 fatal("-%c flag already specified", lflag); 673 lflag = ch; 674 break; 675 case 'x': 676 case 'X': 677 if (xflag != 0) 678 fatal("-%c flag already specified", xflag); 679 xflag = ch; 680 break; 681 case 'c': 682 confirm = 1; 683 break; 684 case 'm': 685 minleft = (int)strtonum(optarg, 1, UINT_MAX, NULL); 686 if (minleft == 0) { 687 usage(); 688 ret = 1; 689 goto done; 690 } 691 break; 692 case 'M': 693 maxsign = (int)strtonum(optarg, 1, UINT_MAX, NULL); 694 if (maxsign == 0) { 695 usage(); 696 ret = 1; 697 goto done; 698 } 699 break; 700 case 'd': 701 deleting = 1; 702 break; 703 case 'D': 704 Dflag = 1; 705 break; 706 case 's': 707 pkcs11provider = optarg; 708 break; 709 case 'S': 710 skprovider = optarg; 711 break; 712 case 'e': 713 deleting = 1; 714 pkcs11provider = optarg; 715 break; 716 case 't': 717 if ((lifetime = convtime(optarg)) == -1 || 718 lifetime < 0 || (u_long)lifetime > UINT32_MAX) { 719 fprintf(stderr, "Invalid lifetime\n"); 720 ret = 1; 721 goto done; 722 } 723 break; 724 case 'q': 725 qflag = 1; 726 break; 727 case 'T': 728 Tflag = 1; 729 break; 730 default: 731 usage(); 732 ret = 1; 733 goto done; 734 } 735 } 736 log_init(__progname, log_level, log_facility, 1); 737 738 if ((xflag != 0) + (lflag != 0) + (Dflag != 0) > 1) 739 fatal("Invalid combination of actions"); 740 else if (xflag) { 741 if (lock_agent(agent_fd, xflag == 'x' ? 1 : 0) == -1) 742 ret = 1; 743 goto done; 744 } else if (lflag) { 745 if (list_identities(agent_fd, lflag == 'l' ? 1 : 0) == -1) 746 ret = 1; 747 goto done; 748 } else if (Dflag) { 749 if (delete_all(agent_fd, qflag) == -1) 750 ret = 1; 751 goto done; 752 } 753 754 if (skprovider == NULL) 755 skprovider = "internal"; 756 757 argc -= optind; 758 argv += optind; 759 if (Tflag) { 760 if (argc <= 0) 761 fatal("no keys to test"); 762 for (r = i = 0; i < argc; i++) 763 r |= test_key(agent_fd, argv[i]); 764 ret = r == 0 ? 0 : 1; 765 goto done; 766 } 767 if (pkcs11provider != NULL) { 768 if (update_card(agent_fd, !deleting, pkcs11provider, 769 qflag) == -1) 770 ret = 1; 771 goto done; 772 } 773 if (do_download) { 774 if (skprovider == NULL) 775 fatal("Cannot download keys without provider"); 776 if (load_resident_keys(agent_fd, skprovider, qflag) != 0) 777 ret = 1; 778 goto done; 779 } 780 if (argc == 0) { 781 char buf[PATH_MAX]; 782 struct passwd *pw; 783 struct stat st; 784 int count = 0; 785 786 if ((pw = getpwuid(getuid())) == NULL) { 787 fprintf(stderr, "No user found with uid %u\n", 788 (u_int)getuid()); 789 ret = 1; 790 goto done; 791 } 792 793 for (i = 0; default_files[i]; i++) { 794 snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir, 795 default_files[i]); 796 if (stat(buf, &st) == -1) 797 continue; 798 if (do_file(agent_fd, deleting, key_only, buf, 799 qflag, skprovider) == -1) 800 ret = 1; 801 else 802 count++; 803 } 804 if (count == 0) 805 ret = 1; 806 } else { 807 for (i = 0; i < argc; i++) { 808 if (do_file(agent_fd, deleting, key_only, 809 argv[i], qflag, skprovider) == -1) 810 ret = 1; 811 } 812 } 813 done: 814 clear_pass(); 815 ssh_close_authentication_socket(agent_fd); 816 return ret; 817 } 818