ssh-keygen.c revision 181111
1/* $OpenBSD: ssh-keygen.c,v 1.171 2008/07/13 21:22:52 sthen Exp $ */ 2/* 3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 4 * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 5 * All rights reserved 6 * Identity and host key generation and maintenance. 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 15#include "includes.h" 16 17#include <sys/types.h> 18#include <sys/socket.h> 19#include <sys/stat.h> 20#include <sys/param.h> 21 22#include <openssl/evp.h> 23#include <openssl/pem.h> 24#include "openbsd-compat/openssl-compat.h" 25 26#include <errno.h> 27#include <fcntl.h> 28#include <netdb.h> 29#ifdef HAVE_PATHS_H 30# include <paths.h> 31#endif 32#include <pwd.h> 33#include <stdarg.h> 34#include <stdio.h> 35#include <stdlib.h> 36#include <string.h> 37#include <unistd.h> 38 39#include "xmalloc.h" 40#include "key.h" 41#include "rsa.h" 42#include "authfile.h" 43#include "uuencode.h" 44#include "buffer.h" 45#include "pathnames.h" 46#include "log.h" 47#include "misc.h" 48#include "match.h" 49#include "hostfile.h" 50#include "dns.h" 51 52#ifdef SMARTCARD 53#include "scard.h" 54#endif 55 56/* Number of bits in the RSA/DSA key. This value can be set on the command line. */ 57#define DEFAULT_BITS 2048 58#define DEFAULT_BITS_DSA 1024 59u_int32_t bits = 0; 60 61/* 62 * Flag indicating that we just want to change the passphrase. This can be 63 * set on the command line. 64 */ 65int change_passphrase = 0; 66 67/* 68 * Flag indicating that we just want to change the comment. This can be set 69 * on the command line. 70 */ 71int change_comment = 0; 72 73int quiet = 0; 74 75int log_level = SYSLOG_LEVEL_INFO; 76 77/* Flag indicating that we want to hash a known_hosts file */ 78int hash_hosts = 0; 79/* Flag indicating that we want lookup a host in known_hosts file */ 80int find_host = 0; 81/* Flag indicating that we want to delete a host from a known_hosts file */ 82int delete_host = 0; 83 84/* Flag indicating that we just want to see the key fingerprint */ 85int print_fingerprint = 0; 86int print_bubblebabble = 0; 87 88/* The identity file name, given on the command line or entered by the user. */ 89char identity_file[1024]; 90int have_identity = 0; 91 92/* This is set to the passphrase if given on the command line. */ 93char *identity_passphrase = NULL; 94 95/* This is set to the new passphrase if given on the command line. */ 96char *identity_new_passphrase = NULL; 97 98/* This is set to the new comment if given on the command line. */ 99char *identity_comment = NULL; 100 101/* Dump public key file in format used by real and the original SSH 2 */ 102int convert_to_ssh2 = 0; 103int convert_from_ssh2 = 0; 104int print_public = 0; 105int print_generic = 0; 106 107char *key_type_name = NULL; 108 109/* argv0 */ 110extern char *__progname; 111 112char hostname[MAXHOSTNAMELEN]; 113 114/* moduli.c */ 115int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); 116int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); 117 118static void 119ask_filename(struct passwd *pw, const char *prompt) 120{ 121 char buf[1024]; 122 char *name = NULL; 123 124 if (key_type_name == NULL) 125 name = _PATH_SSH_CLIENT_ID_RSA; 126 else { 127 switch (key_type_from_name(key_type_name)) { 128 case KEY_RSA1: 129 name = _PATH_SSH_CLIENT_IDENTITY; 130 break; 131 case KEY_DSA: 132 name = _PATH_SSH_CLIENT_ID_DSA; 133 break; 134 case KEY_RSA: 135 name = _PATH_SSH_CLIENT_ID_RSA; 136 break; 137 default: 138 fprintf(stderr, "bad key type"); 139 exit(1); 140 break; 141 } 142 } 143 snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); 144 fprintf(stderr, "%s (%s): ", prompt, identity_file); 145 if (fgets(buf, sizeof(buf), stdin) == NULL) 146 exit(1); 147 buf[strcspn(buf, "\n")] = '\0'; 148 if (strcmp(buf, "") != 0) 149 strlcpy(identity_file, buf, sizeof(identity_file)); 150 have_identity = 1; 151} 152 153static Key * 154load_identity(char *filename) 155{ 156 char *pass; 157 Key *prv; 158 159 prv = key_load_private(filename, "", NULL); 160 if (prv == NULL) { 161 if (identity_passphrase) 162 pass = xstrdup(identity_passphrase); 163 else 164 pass = read_passphrase("Enter passphrase: ", 165 RP_ALLOW_STDIN); 166 prv = key_load_private(filename, pass, NULL); 167 memset(pass, 0, strlen(pass)); 168 xfree(pass); 169 } 170 return prv; 171} 172 173#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" 174#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" 175#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" 176#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb 177 178static void 179do_convert_to_ssh2(struct passwd *pw) 180{ 181 Key *k; 182 u_int len; 183 u_char *blob; 184 struct stat st; 185 186 if (!have_identity) 187 ask_filename(pw, "Enter file in which the key is"); 188 if (stat(identity_file, &st) < 0) { 189 perror(identity_file); 190 exit(1); 191 } 192 if ((k = key_load_public(identity_file, NULL)) == NULL) { 193 if ((k = load_identity(identity_file)) == NULL) { 194 fprintf(stderr, "load failed\n"); 195 exit(1); 196 } 197 } 198 if (k->type == KEY_RSA1) { 199 fprintf(stderr, "version 1 keys are not supported\n"); 200 exit(1); 201 } 202 if (key_to_blob(k, &blob, &len) <= 0) { 203 fprintf(stderr, "key_to_blob failed\n"); 204 exit(1); 205 } 206 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); 207 fprintf(stdout, 208 "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", 209 key_size(k), key_type(k), 210 pw->pw_name, hostname); 211 dump_base64(stdout, blob, len); 212 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); 213 key_free(k); 214 xfree(blob); 215 exit(0); 216} 217 218static void 219buffer_get_bignum_bits(Buffer *b, BIGNUM *value) 220{ 221 u_int bignum_bits = buffer_get_int(b); 222 u_int bytes = (bignum_bits + 7) / 8; 223 224 if (buffer_len(b) < bytes) 225 fatal("buffer_get_bignum_bits: input buffer too small: " 226 "need %d have %d", bytes, buffer_len(b)); 227 if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL) 228 fatal("buffer_get_bignum_bits: BN_bin2bn failed"); 229 buffer_consume(b, bytes); 230} 231 232static Key * 233do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) 234{ 235 Buffer b; 236 Key *key = NULL; 237 char *type, *cipher; 238 u_char *sig, data[] = "abcde12345"; 239 int magic, rlen, ktype, i1, i2, i3, i4; 240 u_int slen; 241 u_long e; 242 243 buffer_init(&b); 244 buffer_append(&b, blob, blen); 245 246 magic = buffer_get_int(&b); 247 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { 248 error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); 249 buffer_free(&b); 250 return NULL; 251 } 252 i1 = buffer_get_int(&b); 253 type = buffer_get_string(&b, NULL); 254 cipher = buffer_get_string(&b, NULL); 255 i2 = buffer_get_int(&b); 256 i3 = buffer_get_int(&b); 257 i4 = buffer_get_int(&b); 258 debug("ignore (%d %d %d %d)", i1, i2, i3, i4); 259 if (strcmp(cipher, "none") != 0) { 260 error("unsupported cipher %s", cipher); 261 xfree(cipher); 262 buffer_free(&b); 263 xfree(type); 264 return NULL; 265 } 266 xfree(cipher); 267 268 if (strstr(type, "dsa")) { 269 ktype = KEY_DSA; 270 } else if (strstr(type, "rsa")) { 271 ktype = KEY_RSA; 272 } else { 273 buffer_free(&b); 274 xfree(type); 275 return NULL; 276 } 277 key = key_new_private(ktype); 278 xfree(type); 279 280 switch (key->type) { 281 case KEY_DSA: 282 buffer_get_bignum_bits(&b, key->dsa->p); 283 buffer_get_bignum_bits(&b, key->dsa->g); 284 buffer_get_bignum_bits(&b, key->dsa->q); 285 buffer_get_bignum_bits(&b, key->dsa->pub_key); 286 buffer_get_bignum_bits(&b, key->dsa->priv_key); 287 break; 288 case KEY_RSA: 289 e = buffer_get_char(&b); 290 debug("e %lx", e); 291 if (e < 30) { 292 e <<= 8; 293 e += buffer_get_char(&b); 294 debug("e %lx", e); 295 e <<= 8; 296 e += buffer_get_char(&b); 297 debug("e %lx", e); 298 } 299 if (!BN_set_word(key->rsa->e, e)) { 300 buffer_free(&b); 301 key_free(key); 302 return NULL; 303 } 304 buffer_get_bignum_bits(&b, key->rsa->d); 305 buffer_get_bignum_bits(&b, key->rsa->n); 306 buffer_get_bignum_bits(&b, key->rsa->iqmp); 307 buffer_get_bignum_bits(&b, key->rsa->q); 308 buffer_get_bignum_bits(&b, key->rsa->p); 309 rsa_generate_additional_parameters(key->rsa); 310 break; 311 } 312 rlen = buffer_len(&b); 313 if (rlen != 0) 314 error("do_convert_private_ssh2_from_blob: " 315 "remaining bytes in key blob %d", rlen); 316 buffer_free(&b); 317 318 /* try the key */ 319 key_sign(key, &sig, &slen, data, sizeof(data)); 320 key_verify(key, sig, slen, data, sizeof(data)); 321 xfree(sig); 322 return key; 323} 324 325static int 326get_line(FILE *fp, char *line, size_t len) 327{ 328 int c; 329 size_t pos = 0; 330 331 line[0] = '\0'; 332 while ((c = fgetc(fp)) != EOF) { 333 if (pos >= len - 1) { 334 fprintf(stderr, "input line too long.\n"); 335 exit(1); 336 } 337 switch (c) { 338 case '\r': 339 c = fgetc(fp); 340 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { 341 fprintf(stderr, "unget: %s\n", strerror(errno)); 342 exit(1); 343 } 344 return pos; 345 case '\n': 346 return pos; 347 } 348 line[pos++] = c; 349 line[pos] = '\0'; 350 } 351 /* We reached EOF */ 352 return -1; 353} 354 355static void 356do_convert_from_ssh2(struct passwd *pw) 357{ 358 Key *k; 359 int blen; 360 u_int len; 361 char line[1024]; 362 u_char blob[8096]; 363 char encoded[8096]; 364 struct stat st; 365 int escaped = 0, private = 0, ok; 366 FILE *fp; 367 368 if (!have_identity) 369 ask_filename(pw, "Enter file in which the key is"); 370 if (stat(identity_file, &st) < 0) { 371 perror(identity_file); 372 exit(1); 373 } 374 fp = fopen(identity_file, "r"); 375 if (fp == NULL) { 376 perror(identity_file); 377 exit(1); 378 } 379 encoded[0] = '\0'; 380 while ((blen = get_line(fp, line, sizeof(line))) != -1) { 381 if (line[blen - 1] == '\\') 382 escaped++; 383 if (strncmp(line, "----", 4) == 0 || 384 strstr(line, ": ") != NULL) { 385 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) 386 private = 1; 387 if (strstr(line, " END ") != NULL) { 388 break; 389 } 390 /* fprintf(stderr, "ignore: %s", line); */ 391 continue; 392 } 393 if (escaped) { 394 escaped--; 395 /* fprintf(stderr, "escaped: %s", line); */ 396 continue; 397 } 398 strlcat(encoded, line, sizeof(encoded)); 399 } 400 len = strlen(encoded); 401 if (((len % 4) == 3) && 402 (encoded[len-1] == '=') && 403 (encoded[len-2] == '=') && 404 (encoded[len-3] == '=')) 405 encoded[len-3] = '\0'; 406 blen = uudecode(encoded, blob, sizeof(blob)); 407 if (blen < 0) { 408 fprintf(stderr, "uudecode failed.\n"); 409 exit(1); 410 } 411 k = private ? 412 do_convert_private_ssh2_from_blob(blob, blen) : 413 key_from_blob(blob, blen); 414 if (k == NULL) { 415 fprintf(stderr, "decode blob failed.\n"); 416 exit(1); 417 } 418 ok = private ? 419 (k->type == KEY_DSA ? 420 PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : 421 PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : 422 key_write(k, stdout); 423 if (!ok) { 424 fprintf(stderr, "key write failed"); 425 exit(1); 426 } 427 key_free(k); 428 if (!private) 429 fprintf(stdout, "\n"); 430 fclose(fp); 431 exit(0); 432} 433 434static void 435do_print_public(struct passwd *pw) 436{ 437 Key *prv; 438 struct stat st; 439 440 if (!have_identity) 441 ask_filename(pw, "Enter file in which the key is"); 442 if (stat(identity_file, &st) < 0) { 443 perror(identity_file); 444 exit(1); 445 } 446 prv = load_identity(identity_file); 447 if (prv == NULL) { 448 fprintf(stderr, "load failed\n"); 449 exit(1); 450 } 451 if (!key_write(prv, stdout)) 452 fprintf(stderr, "key_write failed"); 453 key_free(prv); 454 fprintf(stdout, "\n"); 455 exit(0); 456} 457 458#ifdef SMARTCARD 459static void 460do_upload(struct passwd *pw, const char *sc_reader_id) 461{ 462 Key *prv = NULL; 463 struct stat st; 464 int ret; 465 466 if (!have_identity) 467 ask_filename(pw, "Enter file in which the key is"); 468 if (stat(identity_file, &st) < 0) { 469 perror(identity_file); 470 exit(1); 471 } 472 prv = load_identity(identity_file); 473 if (prv == NULL) { 474 error("load failed"); 475 exit(1); 476 } 477 ret = sc_put_key(prv, sc_reader_id); 478 key_free(prv); 479 if (ret < 0) 480 exit(1); 481 logit("loading key done"); 482 exit(0); 483} 484 485static void 486do_download(struct passwd *pw, const char *sc_reader_id) 487{ 488 Key **keys = NULL; 489 int i; 490 491 keys = sc_get_keys(sc_reader_id, NULL); 492 if (keys == NULL) 493 fatal("cannot read public key from smartcard"); 494 for (i = 0; keys[i]; i++) { 495 key_write(keys[i], stdout); 496 key_free(keys[i]); 497 fprintf(stdout, "\n"); 498 } 499 xfree(keys); 500 exit(0); 501} 502#endif /* SMARTCARD */ 503 504static void 505do_fingerprint(struct passwd *pw) 506{ 507 FILE *f; 508 Key *public; 509 char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra; 510 int i, skip = 0, num = 0, invalid = 1; 511 enum fp_rep rep; 512 enum fp_type fptype; 513 struct stat st; 514 515 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; 516 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; 517 518 if (!have_identity) 519 ask_filename(pw, "Enter file in which the key is"); 520 if (stat(identity_file, &st) < 0) { 521 perror(identity_file); 522 exit(1); 523 } 524 public = key_load_public(identity_file, &comment); 525 if (public != NULL) { 526 fp = key_fingerprint(public, fptype, rep); 527 ra = key_fingerprint(public, fptype, SSH_FP_RANDOMART); 528 printf("%u %s %s (%s)\n", key_size(public), fp, comment, 529 key_type(public)); 530 if (log_level >= SYSLOG_LEVEL_VERBOSE) 531 printf("%s\n", ra); 532 key_free(public); 533 xfree(comment); 534 xfree(ra); 535 xfree(fp); 536 exit(0); 537 } 538 if (comment) { 539 xfree(comment); 540 comment = NULL; 541 } 542 543 f = fopen(identity_file, "r"); 544 if (f != NULL) { 545 while (fgets(line, sizeof(line), f)) { 546 if ((cp = strchr(line, '\n')) == NULL) { 547 error("line %d too long: %.40s...", 548 num + 1, line); 549 skip = 1; 550 continue; 551 } 552 num++; 553 if (skip) { 554 skip = 0; 555 continue; 556 } 557 *cp = '\0'; 558 559 /* Skip leading whitespace, empty and comment lines. */ 560 for (cp = line; *cp == ' ' || *cp == '\t'; cp++) 561 ; 562 if (!*cp || *cp == '\n' || *cp == '#') 563 continue; 564 i = strtol(cp, &ep, 10); 565 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { 566 int quoted = 0; 567 comment = cp; 568 for (; *cp && (quoted || (*cp != ' ' && 569 *cp != '\t')); cp++) { 570 if (*cp == '\\' && cp[1] == '"') 571 cp++; /* Skip both */ 572 else if (*cp == '"') 573 quoted = !quoted; 574 } 575 if (!*cp) 576 continue; 577 *cp++ = '\0'; 578 } 579 ep = cp; 580 public = key_new(KEY_RSA1); 581 if (key_read(public, &cp) != 1) { 582 cp = ep; 583 key_free(public); 584 public = key_new(KEY_UNSPEC); 585 if (key_read(public, &cp) != 1) { 586 key_free(public); 587 continue; 588 } 589 } 590 comment = *cp ? cp : comment; 591 fp = key_fingerprint(public, fptype, rep); 592 ra = key_fingerprint(public, fptype, SSH_FP_RANDOMART); 593 printf("%u %s %s (%s)\n", key_size(public), fp, 594 comment ? comment : "no comment", key_type(public)); 595 if (log_level >= SYSLOG_LEVEL_VERBOSE) 596 printf("%s\n", ra); 597 xfree(ra); 598 xfree(fp); 599 key_free(public); 600 invalid = 0; 601 } 602 fclose(f); 603 } 604 if (invalid) { 605 printf("%s is not a public key file.\n", identity_file); 606 exit(1); 607 } 608 exit(0); 609} 610 611static void 612print_host(FILE *f, const char *name, Key *public, int hash) 613{ 614 if (print_fingerprint) { 615 enum fp_rep rep; 616 enum fp_type fptype; 617 char *fp, *ra; 618 619 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; 620 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; 621 fp = key_fingerprint(public, fptype, rep); 622 ra = key_fingerprint(public, fptype, SSH_FP_RANDOMART); 623 printf("%u %s %s (%s)\n", key_size(public), fp, name, 624 key_type(public)); 625 if (log_level >= SYSLOG_LEVEL_VERBOSE) 626 printf("%s\n", ra); 627 xfree(ra); 628 xfree(fp); 629 } else { 630 if (hash && (name = host_hash(name, NULL, 0)) == NULL) 631 fatal("hash_host failed"); 632 fprintf(f, "%s ", name); 633 if (!key_write(public, f)) 634 fatal("key_write failed"); 635 fprintf(f, "\n"); 636 } 637} 638 639static void 640do_known_hosts(struct passwd *pw, const char *name) 641{ 642 FILE *in, *out = stdout; 643 Key *public; 644 char *cp, *cp2, *kp, *kp2; 645 char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; 646 int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; 647 648 if (!have_identity) { 649 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); 650 if (strlcpy(identity_file, cp, sizeof(identity_file)) >= 651 sizeof(identity_file)) 652 fatal("Specified known hosts path too long"); 653 xfree(cp); 654 have_identity = 1; 655 } 656 if ((in = fopen(identity_file, "r")) == NULL) 657 fatal("fopen: %s", strerror(errno)); 658 659 /* 660 * Find hosts goes to stdout, hash and deletions happen in-place 661 * A corner case is ssh-keygen -HF foo, which should go to stdout 662 */ 663 if (!find_host && (hash_hosts || delete_host)) { 664 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || 665 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || 666 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || 667 strlcat(old, ".old", sizeof(old)) >= sizeof(old)) 668 fatal("known_hosts path too long"); 669 umask(077); 670 if ((c = mkstemp(tmp)) == -1) 671 fatal("mkstemp: %s", strerror(errno)); 672 if ((out = fdopen(c, "w")) == NULL) { 673 c = errno; 674 unlink(tmp); 675 fatal("fdopen: %s", strerror(c)); 676 } 677 inplace = 1; 678 } 679 680 while (fgets(line, sizeof(line), in)) { 681 if ((cp = strchr(line, '\n')) == NULL) { 682 error("line %d too long: %.40s...", num + 1, line); 683 skip = 1; 684 invalid = 1; 685 continue; 686 } 687 num++; 688 if (skip) { 689 skip = 0; 690 continue; 691 } 692 *cp = '\0'; 693 694 /* Skip leading whitespace, empty and comment lines. */ 695 for (cp = line; *cp == ' ' || *cp == '\t'; cp++) 696 ; 697 if (!*cp || *cp == '\n' || *cp == '#') { 698 if (inplace) 699 fprintf(out, "%s\n", cp); 700 continue; 701 } 702 /* Find the end of the host name portion. */ 703 for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) 704 ; 705 if (*kp == '\0' || *(kp + 1) == '\0') { 706 error("line %d missing key: %.40s...", 707 num, line); 708 invalid = 1; 709 continue; 710 } 711 *kp++ = '\0'; 712 kp2 = kp; 713 714 public = key_new(KEY_RSA1); 715 if (key_read(public, &kp) != 1) { 716 kp = kp2; 717 key_free(public); 718 public = key_new(KEY_UNSPEC); 719 if (key_read(public, &kp) != 1) { 720 error("line %d invalid key: %.40s...", 721 num, line); 722 key_free(public); 723 invalid = 1; 724 continue; 725 } 726 } 727 728 if (*cp == HASH_DELIM) { 729 if (find_host || delete_host) { 730 cp2 = host_hash(name, cp, strlen(cp)); 731 if (cp2 == NULL) { 732 error("line %d: invalid hashed " 733 "name: %.64s...", num, line); 734 invalid = 1; 735 continue; 736 } 737 c = (strcmp(cp2, cp) == 0); 738 if (find_host && c) { 739 printf("# Host %s found: " 740 "line %d type %s\n", name, 741 num, key_type(public)); 742 print_host(out, cp, public, 0); 743 } 744 if (delete_host && !c) 745 print_host(out, cp, public, 0); 746 } else if (hash_hosts) 747 print_host(out, cp, public, 0); 748 } else { 749 if (find_host || delete_host) { 750 c = (match_hostname(name, cp, 751 strlen(cp)) == 1); 752 if (find_host && c) { 753 printf("# Host %s found: " 754 "line %d type %s\n", name, 755 num, key_type(public)); 756 print_host(out, name, public, 757 hash_hosts); 758 } 759 if (delete_host && !c) 760 print_host(out, cp, public, 0); 761 } else if (hash_hosts) { 762 for (cp2 = strsep(&cp, ","); 763 cp2 != NULL && *cp2 != '\0'; 764 cp2 = strsep(&cp, ",")) { 765 if (strcspn(cp2, "*?!") != strlen(cp2)) 766 fprintf(stderr, "Warning: " 767 "ignoring host name with " 768 "metacharacters: %.64s\n", 769 cp2); 770 else 771 print_host(out, cp2, public, 1); 772 } 773 has_unhashed = 1; 774 } 775 } 776 key_free(public); 777 } 778 fclose(in); 779 780 if (invalid) { 781 fprintf(stderr, "%s is not a valid known_hosts file.\n", 782 identity_file); 783 if (inplace) { 784 fprintf(stderr, "Not replacing existing known_hosts " 785 "file because of errors\n"); 786 fclose(out); 787 unlink(tmp); 788 } 789 exit(1); 790 } 791 792 if (inplace) { 793 fclose(out); 794 795 /* Backup existing file */ 796 if (unlink(old) == -1 && errno != ENOENT) 797 fatal("unlink %.100s: %s", old, strerror(errno)); 798 if (link(identity_file, old) == -1) 799 fatal("link %.100s to %.100s: %s", identity_file, old, 800 strerror(errno)); 801 /* Move new one into place */ 802 if (rename(tmp, identity_file) == -1) { 803 error("rename\"%s\" to \"%s\": %s", tmp, identity_file, 804 strerror(errno)); 805 unlink(tmp); 806 unlink(old); 807 exit(1); 808 } 809 810 fprintf(stderr, "%s updated.\n", identity_file); 811 fprintf(stderr, "Original contents retained as %s\n", old); 812 if (has_unhashed) { 813 fprintf(stderr, "WARNING: %s contains unhashed " 814 "entries\n", old); 815 fprintf(stderr, "Delete this file to ensure privacy " 816 "of hostnames\n"); 817 } 818 } 819 820 exit(0); 821} 822 823/* 824 * Perform changing a passphrase. The argument is the passwd structure 825 * for the current user. 826 */ 827static void 828do_change_passphrase(struct passwd *pw) 829{ 830 char *comment; 831 char *old_passphrase, *passphrase1, *passphrase2; 832 struct stat st; 833 Key *private; 834 835 if (!have_identity) 836 ask_filename(pw, "Enter file in which the key is"); 837 if (stat(identity_file, &st) < 0) { 838 perror(identity_file); 839 exit(1); 840 } 841 /* Try to load the file with empty passphrase. */ 842 private = key_load_private(identity_file, "", &comment); 843 if (private == NULL) { 844 if (identity_passphrase) 845 old_passphrase = xstrdup(identity_passphrase); 846 else 847 old_passphrase = 848 read_passphrase("Enter old passphrase: ", 849 RP_ALLOW_STDIN); 850 private = key_load_private(identity_file, old_passphrase, 851 &comment); 852 memset(old_passphrase, 0, strlen(old_passphrase)); 853 xfree(old_passphrase); 854 if (private == NULL) { 855 printf("Bad passphrase.\n"); 856 exit(1); 857 } 858 } 859 printf("Key has comment '%s'\n", comment); 860 861 /* Ask the new passphrase (twice). */ 862 if (identity_new_passphrase) { 863 passphrase1 = xstrdup(identity_new_passphrase); 864 passphrase2 = NULL; 865 } else { 866 passphrase1 = 867 read_passphrase("Enter new passphrase (empty for no " 868 "passphrase): ", RP_ALLOW_STDIN); 869 passphrase2 = read_passphrase("Enter same passphrase again: ", 870 RP_ALLOW_STDIN); 871 872 /* Verify that they are the same. */ 873 if (strcmp(passphrase1, passphrase2) != 0) { 874 memset(passphrase1, 0, strlen(passphrase1)); 875 memset(passphrase2, 0, strlen(passphrase2)); 876 xfree(passphrase1); 877 xfree(passphrase2); 878 printf("Pass phrases do not match. Try again.\n"); 879 exit(1); 880 } 881 /* Destroy the other copy. */ 882 memset(passphrase2, 0, strlen(passphrase2)); 883 xfree(passphrase2); 884 } 885 886 /* Save the file using the new passphrase. */ 887 if (!key_save_private(private, identity_file, passphrase1, comment)) { 888 printf("Saving the key failed: %s.\n", identity_file); 889 memset(passphrase1, 0, strlen(passphrase1)); 890 xfree(passphrase1); 891 key_free(private); 892 xfree(comment); 893 exit(1); 894 } 895 /* Destroy the passphrase and the copy of the key in memory. */ 896 memset(passphrase1, 0, strlen(passphrase1)); 897 xfree(passphrase1); 898 key_free(private); /* Destroys contents */ 899 xfree(comment); 900 901 printf("Your identification has been saved with the new passphrase.\n"); 902 exit(0); 903} 904 905/* 906 * Print the SSHFP RR. 907 */ 908static int 909do_print_resource_record(struct passwd *pw, char *fname, char *hname) 910{ 911 Key *public; 912 char *comment = NULL; 913 struct stat st; 914 915 if (fname == NULL) 916 ask_filename(pw, "Enter file in which the key is"); 917 if (stat(fname, &st) < 0) { 918 if (errno == ENOENT) 919 return 0; 920 perror(fname); 921 exit(1); 922 } 923 public = key_load_public(fname, &comment); 924 if (public != NULL) { 925 export_dns_rr(hname, public, stdout, print_generic); 926 key_free(public); 927 xfree(comment); 928 return 1; 929 } 930 if (comment) 931 xfree(comment); 932 933 printf("failed to read v2 public key from %s.\n", fname); 934 exit(1); 935} 936 937/* 938 * Change the comment of a private key file. 939 */ 940static void 941do_change_comment(struct passwd *pw) 942{ 943 char new_comment[1024], *comment, *passphrase; 944 Key *private; 945 Key *public; 946 struct stat st; 947 FILE *f; 948 int fd; 949 950 if (!have_identity) 951 ask_filename(pw, "Enter file in which the key is"); 952 if (stat(identity_file, &st) < 0) { 953 perror(identity_file); 954 exit(1); 955 } 956 private = key_load_private(identity_file, "", &comment); 957 if (private == NULL) { 958 if (identity_passphrase) 959 passphrase = xstrdup(identity_passphrase); 960 else if (identity_new_passphrase) 961 passphrase = xstrdup(identity_new_passphrase); 962 else 963 passphrase = read_passphrase("Enter passphrase: ", 964 RP_ALLOW_STDIN); 965 /* Try to load using the passphrase. */ 966 private = key_load_private(identity_file, passphrase, &comment); 967 if (private == NULL) { 968 memset(passphrase, 0, strlen(passphrase)); 969 xfree(passphrase); 970 printf("Bad passphrase.\n"); 971 exit(1); 972 } 973 } else { 974 passphrase = xstrdup(""); 975 } 976 if (private->type != KEY_RSA1) { 977 fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); 978 key_free(private); 979 exit(1); 980 } 981 printf("Key now has comment '%s'\n", comment); 982 983 if (identity_comment) { 984 strlcpy(new_comment, identity_comment, sizeof(new_comment)); 985 } else { 986 printf("Enter new comment: "); 987 fflush(stdout); 988 if (!fgets(new_comment, sizeof(new_comment), stdin)) { 989 memset(passphrase, 0, strlen(passphrase)); 990 key_free(private); 991 exit(1); 992 } 993 new_comment[strcspn(new_comment, "\n")] = '\0'; 994 } 995 996 /* Save the file using the new passphrase. */ 997 if (!key_save_private(private, identity_file, passphrase, new_comment)) { 998 printf("Saving the key failed: %s.\n", identity_file); 999 memset(passphrase, 0, strlen(passphrase)); 1000 xfree(passphrase); 1001 key_free(private); 1002 xfree(comment); 1003 exit(1); 1004 } 1005 memset(passphrase, 0, strlen(passphrase)); 1006 xfree(passphrase); 1007 public = key_from_private(private); 1008 key_free(private); 1009 1010 strlcat(identity_file, ".pub", sizeof(identity_file)); 1011 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 1012 if (fd == -1) { 1013 printf("Could not save your public key in %s\n", identity_file); 1014 exit(1); 1015 } 1016 f = fdopen(fd, "w"); 1017 if (f == NULL) { 1018 printf("fdopen %s failed", identity_file); 1019 exit(1); 1020 } 1021 if (!key_write(public, f)) 1022 fprintf(stderr, "write key failed"); 1023 key_free(public); 1024 fprintf(f, " %s\n", new_comment); 1025 fclose(f); 1026 1027 xfree(comment); 1028 1029 printf("The comment in your key file has been changed.\n"); 1030 exit(0); 1031} 1032 1033static void 1034usage(void) 1035{ 1036 fprintf(stderr, "usage: %s [options]\n", __progname); 1037 fprintf(stderr, "Options:\n"); 1038 fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); 1039 fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); 1040 fprintf(stderr, " -b bits Number of bits in the key to create.\n"); 1041 fprintf(stderr, " -C comment Provide new comment.\n"); 1042 fprintf(stderr, " -c Change comment in private and public key files.\n"); 1043#ifdef SMARTCARD 1044 fprintf(stderr, " -D reader Download public key from smartcard.\n"); 1045#endif /* SMARTCARD */ 1046 fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n"); 1047 fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); 1048 fprintf(stderr, " -f filename Filename of the key file.\n"); 1049 fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); 1050 fprintf(stderr, " -g Use generic DNS resource record format.\n"); 1051 fprintf(stderr, " -H Hash names in known_hosts file.\n"); 1052 fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n"); 1053 fprintf(stderr, " -l Show fingerprint of key file.\n"); 1054 fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); 1055 fprintf(stderr, " -N phrase Provide new passphrase.\n"); 1056 fprintf(stderr, " -P phrase Provide old passphrase.\n"); 1057 fprintf(stderr, " -p Change passphrase of private key file.\n"); 1058 fprintf(stderr, " -q Quiet.\n"); 1059 fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); 1060 fprintf(stderr, " -r hostname Print DNS resource record.\n"); 1061 fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); 1062 fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); 1063 fprintf(stderr, " -t type Specify type of key to create.\n"); 1064#ifdef SMARTCARD 1065 fprintf(stderr, " -U reader Upload private key to smartcard.\n"); 1066#endif /* SMARTCARD */ 1067 fprintf(stderr, " -v Verbose.\n"); 1068 fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); 1069 fprintf(stderr, " -y Read private key file and print public key.\n"); 1070 1071 exit(1); 1072} 1073 1074/* 1075 * Main program for key management. 1076 */ 1077int 1078main(int argc, char **argv) 1079{ 1080 char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; 1081 char out_file[MAXPATHLEN], *reader_id = NULL; 1082 char *rr_hostname = NULL; 1083 Key *private, *public; 1084 struct passwd *pw; 1085 struct stat st; 1086 int opt, type, fd, download = 0; 1087 u_int32_t memory = 0, generator_wanted = 0, trials = 100; 1088 int do_gen_candidates = 0, do_screen_candidates = 0; 1089 BIGNUM *start = NULL; 1090 FILE *f; 1091 const char *errstr; 1092 1093 extern int optind; 1094 extern char *optarg; 1095 1096 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 1097 sanitise_stdfd(); 1098 1099 __progname = ssh_get_progname(argv[0]); 1100 1101 SSLeay_add_all_algorithms(); 1102 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); 1103 1104 init_rng(); 1105 seed_rng(); 1106 1107 /* we need this for the home * directory. */ 1108 pw = getpwuid(getuid()); 1109 if (!pw) { 1110 printf("You don't exist, go away!\n"); 1111 exit(1); 1112 } 1113 if (gethostname(hostname, sizeof(hostname)) < 0) { 1114 perror("gethostname"); 1115 exit(1); 1116 } 1117 1118 while ((opt = getopt(argc, argv, 1119 "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { 1120 switch (opt) { 1121 case 'b': 1122 bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr); 1123 if (errstr) 1124 fatal("Bits has bad value %s (%s)", 1125 optarg, errstr); 1126 break; 1127 case 'F': 1128 find_host = 1; 1129 rr_hostname = optarg; 1130 break; 1131 case 'H': 1132 hash_hosts = 1; 1133 break; 1134 case 'R': 1135 delete_host = 1; 1136 rr_hostname = optarg; 1137 break; 1138 case 'l': 1139 print_fingerprint = 1; 1140 break; 1141 case 'B': 1142 print_bubblebabble = 1; 1143 break; 1144 case 'p': 1145 change_passphrase = 1; 1146 break; 1147 case 'c': 1148 change_comment = 1; 1149 break; 1150 case 'f': 1151 if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= 1152 sizeof(identity_file)) 1153 fatal("Identity filename too long"); 1154 have_identity = 1; 1155 break; 1156 case 'g': 1157 print_generic = 1; 1158 break; 1159 case 'P': 1160 identity_passphrase = optarg; 1161 break; 1162 case 'N': 1163 identity_new_passphrase = optarg; 1164 break; 1165 case 'C': 1166 identity_comment = optarg; 1167 break; 1168 case 'q': 1169 quiet = 1; 1170 break; 1171 case 'e': 1172 case 'x': 1173 /* export key */ 1174 convert_to_ssh2 = 1; 1175 break; 1176 case 'i': 1177 case 'X': 1178 /* import key */ 1179 convert_from_ssh2 = 1; 1180 break; 1181 case 'y': 1182 print_public = 1; 1183 break; 1184 case 'd': 1185 key_type_name = "dsa"; 1186 break; 1187 case 't': 1188 key_type_name = optarg; 1189 break; 1190 case 'D': 1191 download = 1; 1192 /*FALLTHROUGH*/ 1193 case 'U': 1194 reader_id = optarg; 1195 break; 1196 case 'v': 1197 if (log_level == SYSLOG_LEVEL_INFO) 1198 log_level = SYSLOG_LEVEL_DEBUG1; 1199 else { 1200 if (log_level >= SYSLOG_LEVEL_DEBUG1 && 1201 log_level < SYSLOG_LEVEL_DEBUG3) 1202 log_level++; 1203 } 1204 break; 1205 case 'r': 1206 rr_hostname = optarg; 1207 break; 1208 case 'W': 1209 generator_wanted = (u_int32_t)strtonum(optarg, 1, 1210 UINT_MAX, &errstr); 1211 if (errstr) 1212 fatal("Desired generator has bad value: %s (%s)", 1213 optarg, errstr); 1214 break; 1215 case 'a': 1216 trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); 1217 if (errstr) 1218 fatal("Invalid number of trials: %s (%s)", 1219 optarg, errstr); 1220 break; 1221 case 'M': 1222 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); 1223 if (errstr) { 1224 fatal("Memory limit is %s: %s", errstr, optarg); 1225 } 1226 break; 1227 case 'G': 1228 do_gen_candidates = 1; 1229 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 1230 sizeof(out_file)) 1231 fatal("Output filename too long"); 1232 break; 1233 case 'T': 1234 do_screen_candidates = 1; 1235 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 1236 sizeof(out_file)) 1237 fatal("Output filename too long"); 1238 break; 1239 case 'S': 1240 /* XXX - also compare length against bits */ 1241 if (BN_hex2bn(&start, optarg) == 0) 1242 fatal("Invalid start point."); 1243 break; 1244 case '?': 1245 default: 1246 usage(); 1247 } 1248 } 1249 1250 /* reinit */ 1251 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); 1252 1253 if (optind < argc) { 1254 printf("Too many arguments.\n"); 1255 usage(); 1256 } 1257 if (change_passphrase && change_comment) { 1258 printf("Can only have one of -p and -c.\n"); 1259 usage(); 1260 } 1261 if (print_fingerprint && (delete_host || hash_hosts)) { 1262 printf("Cannot use -l with -D or -R.\n"); 1263 usage(); 1264 } 1265 if (delete_host || hash_hosts || find_host) 1266 do_known_hosts(pw, rr_hostname); 1267 if (print_fingerprint || print_bubblebabble) 1268 do_fingerprint(pw); 1269 if (change_passphrase) 1270 do_change_passphrase(pw); 1271 if (change_comment) 1272 do_change_comment(pw); 1273 if (convert_to_ssh2) 1274 do_convert_to_ssh2(pw); 1275 if (convert_from_ssh2) 1276 do_convert_from_ssh2(pw); 1277 if (print_public) 1278 do_print_public(pw); 1279 if (rr_hostname != NULL) { 1280 unsigned int n = 0; 1281 1282 if (have_identity) { 1283 n = do_print_resource_record(pw, 1284 identity_file, rr_hostname); 1285 if (n == 0) { 1286 perror(identity_file); 1287 exit(1); 1288 } 1289 exit(0); 1290 } else { 1291 1292 n += do_print_resource_record(pw, 1293 _PATH_HOST_RSA_KEY_FILE, rr_hostname); 1294 n += do_print_resource_record(pw, 1295 _PATH_HOST_DSA_KEY_FILE, rr_hostname); 1296 1297 if (n == 0) 1298 fatal("no keys found."); 1299 exit(0); 1300 } 1301 } 1302 if (reader_id != NULL) { 1303#ifdef SMARTCARD 1304 if (download) 1305 do_download(pw, reader_id); 1306 else 1307 do_upload(pw, reader_id); 1308#else /* SMARTCARD */ 1309 fatal("no support for smartcards."); 1310#endif /* SMARTCARD */ 1311 } 1312 1313 if (do_gen_candidates) { 1314 FILE *out = fopen(out_file, "w"); 1315 1316 if (out == NULL) { 1317 error("Couldn't open modulus candidate file \"%s\": %s", 1318 out_file, strerror(errno)); 1319 return (1); 1320 } 1321 if (bits == 0) 1322 bits = DEFAULT_BITS; 1323 if (gen_candidates(out, memory, bits, start) != 0) 1324 fatal("modulus candidate generation failed"); 1325 1326 return (0); 1327 } 1328 1329 if (do_screen_candidates) { 1330 FILE *in; 1331 FILE *out = fopen(out_file, "w"); 1332 1333 if (have_identity && strcmp(identity_file, "-") != 0) { 1334 if ((in = fopen(identity_file, "r")) == NULL) { 1335 fatal("Couldn't open modulus candidate " 1336 "file \"%s\": %s", identity_file, 1337 strerror(errno)); 1338 } 1339 } else 1340 in = stdin; 1341 1342 if (out == NULL) { 1343 fatal("Couldn't open moduli file \"%s\": %s", 1344 out_file, strerror(errno)); 1345 } 1346 if (prime_test(in, out, trials, generator_wanted) != 0) 1347 fatal("modulus screening failed"); 1348 return (0); 1349 } 1350 1351 arc4random_stir(); 1352 1353 if (key_type_name == NULL) 1354 key_type_name = "rsa"; 1355 1356 type = key_type_from_name(key_type_name); 1357 if (type == KEY_UNSPEC) { 1358 fprintf(stderr, "unknown key type %s\n", key_type_name); 1359 exit(1); 1360 } 1361 if (bits == 0) 1362 bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; 1363 if (type == KEY_DSA && bits != 1024) 1364 fatal("DSA keys must be 1024 bits"); 1365 if (!quiet) 1366 printf("Generating public/private %s key pair.\n", key_type_name); 1367 private = key_generate(type, bits); 1368 if (private == NULL) { 1369 fprintf(stderr, "key_generate failed"); 1370 exit(1); 1371 } 1372 public = key_from_private(private); 1373 1374 if (!have_identity) 1375 ask_filename(pw, "Enter file in which to save the key"); 1376 1377 /* Create ~/.ssh directory if it doesn't already exist. */ 1378 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); 1379 if (strstr(identity_file, dotsshdir) != NULL && 1380 stat(dotsshdir, &st) < 0) { 1381 if (mkdir(dotsshdir, 0700) < 0) 1382 error("Could not create directory '%s'.", dotsshdir); 1383 else if (!quiet) 1384 printf("Created directory '%s'.\n", dotsshdir); 1385 } 1386 /* If the file already exists, ask the user to confirm. */ 1387 if (stat(identity_file, &st) >= 0) { 1388 char yesno[3]; 1389 printf("%s already exists.\n", identity_file); 1390 printf("Overwrite (y/n)? "); 1391 fflush(stdout); 1392 if (fgets(yesno, sizeof(yesno), stdin) == NULL) 1393 exit(1); 1394 if (yesno[0] != 'y' && yesno[0] != 'Y') 1395 exit(1); 1396 } 1397 /* Ask for a passphrase (twice). */ 1398 if (identity_passphrase) 1399 passphrase1 = xstrdup(identity_passphrase); 1400 else if (identity_new_passphrase) 1401 passphrase1 = xstrdup(identity_new_passphrase); 1402 else { 1403passphrase_again: 1404 passphrase1 = 1405 read_passphrase("Enter passphrase (empty for no " 1406 "passphrase): ", RP_ALLOW_STDIN); 1407 passphrase2 = read_passphrase("Enter same passphrase again: ", 1408 RP_ALLOW_STDIN); 1409 if (strcmp(passphrase1, passphrase2) != 0) { 1410 /* 1411 * The passphrases do not match. Clear them and 1412 * retry. 1413 */ 1414 memset(passphrase1, 0, strlen(passphrase1)); 1415 memset(passphrase2, 0, strlen(passphrase2)); 1416 xfree(passphrase1); 1417 xfree(passphrase2); 1418 printf("Passphrases do not match. Try again.\n"); 1419 goto passphrase_again; 1420 } 1421 /* Clear the other copy of the passphrase. */ 1422 memset(passphrase2, 0, strlen(passphrase2)); 1423 xfree(passphrase2); 1424 } 1425 1426 if (identity_comment) { 1427 strlcpy(comment, identity_comment, sizeof(comment)); 1428 } else { 1429 /* Create default commend field for the passphrase. */ 1430 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); 1431 } 1432 1433 /* Save the key with the given passphrase and comment. */ 1434 if (!key_save_private(private, identity_file, passphrase1, comment)) { 1435 printf("Saving the key failed: %s.\n", identity_file); 1436 memset(passphrase1, 0, strlen(passphrase1)); 1437 xfree(passphrase1); 1438 exit(1); 1439 } 1440 /* Clear the passphrase. */ 1441 memset(passphrase1, 0, strlen(passphrase1)); 1442 xfree(passphrase1); 1443 1444 /* Clear the private key and the random number generator. */ 1445 key_free(private); 1446 arc4random_stir(); 1447 1448 if (!quiet) 1449 printf("Your identification has been saved in %s.\n", identity_file); 1450 1451 strlcat(identity_file, ".pub", sizeof(identity_file)); 1452 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 1453 if (fd == -1) { 1454 printf("Could not save your public key in %s\n", identity_file); 1455 exit(1); 1456 } 1457 f = fdopen(fd, "w"); 1458 if (f == NULL) { 1459 printf("fdopen %s failed", identity_file); 1460 exit(1); 1461 } 1462 if (!key_write(public, f)) 1463 fprintf(stderr, "write key failed"); 1464 fprintf(f, " %s\n", comment); 1465 fclose(f); 1466 1467 if (!quiet) { 1468 char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); 1469 char *ra = key_fingerprint(public, SSH_FP_MD5, 1470 SSH_FP_RANDOMART); 1471 printf("Your public key has been saved in %s.\n", 1472 identity_file); 1473 printf("The key fingerprint is:\n"); 1474 printf("%s %s\n", fp, comment); 1475 printf("The key's randomart image is:\n"); 1476 printf("%s\n", ra); 1477 xfree(ra); 1478 xfree(fp); 1479 } 1480 1481 key_free(public); 1482 exit(0); 1483} 1484