1 /* $OpenBSD: ssh-keygen.c,v 1.304 2017/05/30 14:16:41 markus 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 <sys/types.h> 16 #include <sys/socket.h> 17 #include <sys/stat.h> 18 19 #include <openssl/evp.h> 20 #include <openssl/pem.h> 21 22 #include <errno.h> 23 #include <fcntl.h> 24 #include <netdb.h> 25 #include <pwd.h> 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <string.h> 29 #include <unistd.h> 30 #include <limits.h> 31 #include <locale.h> 32 33 #include "xmalloc.h" 34 #include "sshkey.h" 35 #include "rsa.h" 36 #include "authfile.h" 37 #include "uuencode.h" 38 #include "sshbuf.h" 39 #include "pathnames.h" 40 #include "log.h" 41 #include "misc.h" 42 #include "match.h" 43 #include "hostfile.h" 44 #include "dns.h" 45 #include "ssh.h" 46 #include "ssh2.h" 47 #include "ssherr.h" 48 #include "atomicio.h" 49 #include "krl.h" 50 #include "digest.h" 51 #include "utf8.h" 52 53 #ifdef ENABLE_PKCS11 54 #include "ssh-pkcs11.h" 55 #endif 56 57 #ifdef WITH_OPENSSL 58 # define DEFAULT_KEY_TYPE_NAME "rsa" 59 #else 60 # define DEFAULT_KEY_TYPE_NAME "ed25519" 61 #endif 62 63 /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ 64 #define DEFAULT_BITS 2048 65 #define DEFAULT_BITS_DSA 1024 66 #define DEFAULT_BITS_ECDSA 256 67 u_int32_t bits = 0; 68 69 /* 70 * Flag indicating that we just want to change the passphrase. This can be 71 * set on the command line. 72 */ 73 int change_passphrase = 0; 74 75 /* 76 * Flag indicating that we just want to change the comment. This can be set 77 * on the command line. 78 */ 79 int change_comment = 0; 80 81 int quiet = 0; 82 83 int log_level = SYSLOG_LEVEL_INFO; 84 85 /* Flag indicating that we want to hash a known_hosts file */ 86 int hash_hosts = 0; 87 /* Flag indicating that we want lookup a host in known_hosts file */ 88 int find_host = 0; 89 /* Flag indicating that we want to delete a host from a known_hosts file */ 90 int delete_host = 0; 91 92 /* Flag indicating that we want to show the contents of a certificate */ 93 int show_cert = 0; 94 95 /* Flag indicating that we just want to see the key fingerprint */ 96 int print_fingerprint = 0; 97 int print_bubblebabble = 0; 98 99 /* Hash algorithm to use for fingerprints. */ 100 int fingerprint_hash = SSH_FP_HASH_DEFAULT; 101 102 /* The identity file name, given on the command line or entered by the user. */ 103 char identity_file[1024]; 104 int have_identity = 0; 105 106 /* This is set to the passphrase if given on the command line. */ 107 char *identity_passphrase = NULL; 108 109 /* This is set to the new passphrase if given on the command line. */ 110 char *identity_new_passphrase = NULL; 111 112 /* This is set to the new comment if given on the command line. */ 113 char *identity_comment = NULL; 114 115 /* Path to CA key when certifying keys. */ 116 char *ca_key_path = NULL; 117 118 /* Certificate serial number */ 119 unsigned long long cert_serial = 0; 120 121 /* Key type when certifying */ 122 u_int cert_key_type = SSH2_CERT_TYPE_USER; 123 124 /* "key ID" of signed key */ 125 char *cert_key_id = NULL; 126 127 /* Comma-separated list of principal names for certifying keys */ 128 char *cert_principals = NULL; 129 130 /* Validity period for certificates */ 131 u_int64_t cert_valid_from = 0; 132 u_int64_t cert_valid_to = ~0ULL; 133 134 /* Certificate options */ 135 #define CERTOPT_X_FWD (1) 136 #define CERTOPT_AGENT_FWD (1<<1) 137 #define CERTOPT_PORT_FWD (1<<2) 138 #define CERTOPT_PTY (1<<3) 139 #define CERTOPT_USER_RC (1<<4) 140 #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \ 141 CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC) 142 u_int32_t certflags_flags = CERTOPT_DEFAULT; 143 char *certflags_command = NULL; 144 char *certflags_src_addr = NULL; 145 146 /* Arbitrary extensions specified by user */ 147 struct cert_userext { 148 char *key; 149 char *val; 150 int crit; 151 }; 152 struct cert_userext *cert_userext; 153 size_t ncert_userext; 154 155 /* Conversion to/from various formats */ 156 int convert_to = 0; 157 int convert_from = 0; 158 enum { 159 FMT_RFC4716, 160 FMT_PKCS8, 161 FMT_PEM 162 } convert_format = FMT_RFC4716; 163 int print_public = 0; 164 int print_generic = 0; 165 166 char *key_type_name = NULL; 167 168 /* Load key from this PKCS#11 provider */ 169 char *pkcs11provider = NULL; 170 171 /* Use new OpenSSH private key format when writing SSH2 keys instead of PEM */ 172 int use_new_format = 0; 173 174 /* Cipher for new-format private keys */ 175 char *new_format_cipher = NULL; 176 177 /* 178 * Number of KDF rounds to derive new format keys / 179 * number of primality trials when screening moduli. 180 */ 181 int rounds = 0; 182 183 /* argv0 */ 184 extern char *__progname; 185 186 char hostname[NI_MAXHOST]; 187 188 #ifdef WITH_OPENSSL 189 /* moduli.c */ 190 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); 191 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long, 192 unsigned long); 193 #endif 194 195 static void 196 type_bits_valid(int type, const char *name, u_int32_t *bitsp) 197 { 198 #ifdef WITH_OPENSSL 199 u_int maxbits, nid; 200 #endif 201 202 if (type == KEY_UNSPEC) 203 fatal("unknown key type %s", key_type_name); 204 if (*bitsp == 0) { 205 #ifdef WITH_OPENSSL 206 if (type == KEY_DSA) 207 *bitsp = DEFAULT_BITS_DSA; 208 else if (type == KEY_ECDSA) { 209 if (name != NULL && 210 (nid = sshkey_ecdsa_nid_from_name(name)) > 0) 211 *bitsp = sshkey_curve_nid_to_bits(nid); 212 if (*bitsp == 0) 213 *bitsp = DEFAULT_BITS_ECDSA; 214 } else 215 #endif 216 *bitsp = DEFAULT_BITS; 217 } 218 #ifdef WITH_OPENSSL 219 maxbits = (type == KEY_DSA) ? 220 OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS; 221 if (*bitsp > maxbits) 222 fatal("key bits exceeds maximum %d", maxbits); 223 switch (type) { 224 case KEY_DSA: 225 if (*bitsp != 1024) 226 fatal("Invalid DSA key length: must be 1024 bits"); 227 break; 228 case KEY_RSA: 229 if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE) 230 fatal("Invalid RSA key length: minimum is %d bits", 231 SSH_RSA_MINIMUM_MODULUS_SIZE); 232 break; 233 case KEY_ECDSA: 234 if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1) 235 fatal("Invalid ECDSA key length: valid lengths are " 236 "256, 384 or 521 bits"); 237 } 238 #endif 239 } 240 241 static void 242 ask_filename(struct passwd *pw, const char *prompt) 243 { 244 char buf[1024]; 245 char *name = NULL; 246 247 if (key_type_name == NULL) 248 name = _PATH_SSH_CLIENT_ID_RSA; 249 else { 250 switch (sshkey_type_from_name(key_type_name)) { 251 case KEY_DSA_CERT: 252 case KEY_DSA: 253 name = _PATH_SSH_CLIENT_ID_DSA; 254 break; 255 case KEY_ECDSA_CERT: 256 case KEY_ECDSA: 257 name = _PATH_SSH_CLIENT_ID_ECDSA; 258 break; 259 case KEY_RSA_CERT: 260 case KEY_RSA: 261 name = _PATH_SSH_CLIENT_ID_RSA; 262 break; 263 case KEY_ED25519: 264 case KEY_ED25519_CERT: 265 name = _PATH_SSH_CLIENT_ID_ED25519; 266 break; 267 default: 268 fatal("bad key type"); 269 } 270 } 271 snprintf(identity_file, sizeof(identity_file), 272 "%s/%s", pw->pw_dir, name); 273 printf("%s (%s): ", prompt, identity_file); 274 fflush(stdout); 275 if (fgets(buf, sizeof(buf), stdin) == NULL) 276 exit(1); 277 buf[strcspn(buf, "\n")] = '\0'; 278 if (strcmp(buf, "") != 0) 279 strlcpy(identity_file, buf, sizeof(identity_file)); 280 have_identity = 1; 281 } 282 283 static struct sshkey * 284 load_identity(char *filename) 285 { 286 char *pass; 287 struct sshkey *prv; 288 int r; 289 290 if ((r = sshkey_load_private(filename, "", &prv, NULL)) == 0) 291 return prv; 292 if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 293 fatal("Load key \"%s\": %s", filename, ssh_err(r)); 294 if (identity_passphrase) 295 pass = xstrdup(identity_passphrase); 296 else 297 pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN); 298 r = sshkey_load_private(filename, pass, &prv, NULL); 299 explicit_bzero(pass, strlen(pass)); 300 free(pass); 301 if (r != 0) 302 fatal("Load key \"%s\": %s", filename, ssh_err(r)); 303 return prv; 304 } 305 306 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" 307 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" 308 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" 309 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb 310 311 #ifdef WITH_OPENSSL 312 static void 313 do_convert_to_ssh2(struct passwd *pw, struct sshkey *k) 314 { 315 size_t len; 316 u_char *blob; 317 char comment[61]; 318 int r; 319 320 if ((r = sshkey_to_blob(k, &blob, &len)) != 0) 321 fatal("key_to_blob failed: %s", ssh_err(r)); 322 /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */ 323 snprintf(comment, sizeof(comment), 324 "%u-bit %s, converted by %s@%s from OpenSSH", 325 sshkey_size(k), sshkey_type(k), 326 pw->pw_name, hostname); 327 328 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); 329 fprintf(stdout, "Comment: \"%s\"\n", comment); 330 dump_base64(stdout, blob, len); 331 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); 332 sshkey_free(k); 333 free(blob); 334 exit(0); 335 } 336 337 static void 338 do_convert_to_pkcs8(struct sshkey *k) 339 { 340 switch (sshkey_type_plain(k->type)) { 341 case KEY_RSA: 342 if (!PEM_write_RSA_PUBKEY(stdout, k->rsa)) 343 fatal("PEM_write_RSA_PUBKEY failed"); 344 break; 345 case KEY_DSA: 346 if (!PEM_write_DSA_PUBKEY(stdout, k->dsa)) 347 fatal("PEM_write_DSA_PUBKEY failed"); 348 break; 349 case KEY_ECDSA: 350 if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa)) 351 fatal("PEM_write_EC_PUBKEY failed"); 352 break; 353 default: 354 fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); 355 } 356 exit(0); 357 } 358 359 static void 360 do_convert_to_pem(struct sshkey *k) 361 { 362 switch (sshkey_type_plain(k->type)) { 363 case KEY_RSA: 364 if (!PEM_write_RSAPublicKey(stdout, k->rsa)) 365 fatal("PEM_write_RSAPublicKey failed"); 366 break; 367 #if notyet /* OpenSSH 0.9.8 lacks this function */ 368 case KEY_DSA: 369 if (!PEM_write_DSAPublicKey(stdout, k->dsa)) 370 fatal("PEM_write_DSAPublicKey failed"); 371 break; 372 #endif 373 /* XXX ECDSA? */ 374 default: 375 fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); 376 } 377 exit(0); 378 } 379 380 static void 381 do_convert_to(struct passwd *pw) 382 { 383 struct sshkey *k; 384 struct stat st; 385 int r; 386 387 if (!have_identity) 388 ask_filename(pw, "Enter file in which the key is"); 389 if (stat(identity_file, &st) < 0) 390 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 391 if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0) 392 k = load_identity(identity_file); 393 switch (convert_format) { 394 case FMT_RFC4716: 395 do_convert_to_ssh2(pw, k); 396 break; 397 case FMT_PKCS8: 398 do_convert_to_pkcs8(k); 399 break; 400 case FMT_PEM: 401 do_convert_to_pem(k); 402 break; 403 default: 404 fatal("%s: unknown key format %d", __func__, convert_format); 405 } 406 exit(0); 407 } 408 409 /* 410 * This is almost exactly the bignum1 encoding, but with 32 bit for length 411 * instead of 16. 412 */ 413 static void 414 buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value) 415 { 416 u_int bytes, bignum_bits; 417 int r; 418 419 if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0) 420 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 421 bytes = (bignum_bits + 7) / 8; 422 if (sshbuf_len(b) < bytes) 423 fatal("%s: input buffer too small: need %d have %zu", 424 __func__, bytes, sshbuf_len(b)); 425 if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL) 426 fatal("%s: BN_bin2bn failed", __func__); 427 if ((r = sshbuf_consume(b, bytes)) != 0) 428 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 429 } 430 431 static struct sshkey * 432 do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) 433 { 434 struct sshbuf *b; 435 struct sshkey *key = NULL; 436 char *type, *cipher; 437 u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345"; 438 int r, rlen, ktype; 439 u_int magic, i1, i2, i3, i4; 440 size_t slen; 441 u_long e; 442 443 if ((b = sshbuf_from(blob, blen)) == NULL) 444 fatal("%s: sshbuf_from failed", __func__); 445 if ((r = sshbuf_get_u32(b, &magic)) != 0) 446 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 447 448 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { 449 error("bad magic 0x%x != 0x%x", magic, 450 SSH_COM_PRIVATE_KEY_MAGIC); 451 sshbuf_free(b); 452 return NULL; 453 } 454 if ((r = sshbuf_get_u32(b, &i1)) != 0 || 455 (r = sshbuf_get_cstring(b, &type, NULL)) != 0 || 456 (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 || 457 (r = sshbuf_get_u32(b, &i2)) != 0 || 458 (r = sshbuf_get_u32(b, &i3)) != 0 || 459 (r = sshbuf_get_u32(b, &i4)) != 0) 460 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 461 debug("ignore (%d %d %d %d)", i1, i2, i3, i4); 462 if (strcmp(cipher, "none") != 0) { 463 error("unsupported cipher %s", cipher); 464 free(cipher); 465 sshbuf_free(b); 466 free(type); 467 return NULL; 468 } 469 free(cipher); 470 471 if (strstr(type, "dsa")) { 472 ktype = KEY_DSA; 473 } else if (strstr(type, "rsa")) { 474 ktype = KEY_RSA; 475 } else { 476 sshbuf_free(b); 477 free(type); 478 return NULL; 479 } 480 if ((key = sshkey_new_private(ktype)) == NULL) 481 fatal("sshkey_new_private failed"); 482 free(type); 483 484 switch (key->type) { 485 case KEY_DSA: 486 buffer_get_bignum_bits(b, key->dsa->p); 487 buffer_get_bignum_bits(b, key->dsa->g); 488 buffer_get_bignum_bits(b, key->dsa->q); 489 buffer_get_bignum_bits(b, key->dsa->pub_key); 490 buffer_get_bignum_bits(b, key->dsa->priv_key); 491 break; 492 case KEY_RSA: 493 if ((r = sshbuf_get_u8(b, &e1)) != 0 || 494 (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) || 495 (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0)) 496 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 497 e = e1; 498 debug("e %lx", e); 499 if (e < 30) { 500 e <<= 8; 501 e += e2; 502 debug("e %lx", e); 503 e <<= 8; 504 e += e3; 505 debug("e %lx", e); 506 } 507 if (!BN_set_word(key->rsa->e, e)) { 508 sshbuf_free(b); 509 sshkey_free(key); 510 return NULL; 511 } 512 buffer_get_bignum_bits(b, key->rsa->d); 513 buffer_get_bignum_bits(b, key->rsa->n); 514 buffer_get_bignum_bits(b, key->rsa->iqmp); 515 buffer_get_bignum_bits(b, key->rsa->q); 516 buffer_get_bignum_bits(b, key->rsa->p); 517 if ((r = rsa_generate_additional_parameters(key->rsa)) != 0) 518 fatal("generate RSA parameters failed: %s", ssh_err(r)); 519 break; 520 } 521 rlen = sshbuf_len(b); 522 if (rlen != 0) 523 error("do_convert_private_ssh2_from_blob: " 524 "remaining bytes in key blob %d", rlen); 525 sshbuf_free(b); 526 527 /* try the key */ 528 if (sshkey_sign(key, &sig, &slen, data, sizeof(data), NULL, 0) != 0 || 529 sshkey_verify(key, sig, slen, data, sizeof(data), 0) != 0) { 530 sshkey_free(key); 531 free(sig); 532 return NULL; 533 } 534 free(sig); 535 return key; 536 } 537 538 static int 539 get_line(FILE *fp, char *line, size_t len) 540 { 541 int c; 542 size_t pos = 0; 543 544 line[0] = '\0'; 545 while ((c = fgetc(fp)) != EOF) { 546 if (pos >= len - 1) 547 fatal("input line too long."); 548 switch (c) { 549 case '\r': 550 c = fgetc(fp); 551 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) 552 fatal("unget: %s", strerror(errno)); 553 return pos; 554 case '\n': 555 return pos; 556 } 557 line[pos++] = c; 558 line[pos] = '\0'; 559 } 560 /* We reached EOF */ 561 return -1; 562 } 563 564 static void 565 do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private) 566 { 567 int r, blen, escaped = 0; 568 u_int len; 569 char line[1024]; 570 u_char blob[8096]; 571 char encoded[8096]; 572 FILE *fp; 573 574 if ((fp = fopen(identity_file, "r")) == NULL) 575 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 576 encoded[0] = '\0'; 577 while ((blen = get_line(fp, line, sizeof(line))) != -1) { 578 if (blen > 0 && line[blen - 1] == '\\') 579 escaped++; 580 if (strncmp(line, "----", 4) == 0 || 581 strstr(line, ": ") != NULL) { 582 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) 583 *private = 1; 584 if (strstr(line, " END ") != NULL) { 585 break; 586 } 587 /* fprintf(stderr, "ignore: %s", line); */ 588 continue; 589 } 590 if (escaped) { 591 escaped--; 592 /* fprintf(stderr, "escaped: %s", line); */ 593 continue; 594 } 595 strlcat(encoded, line, sizeof(encoded)); 596 } 597 len = strlen(encoded); 598 if (((len % 4) == 3) && 599 (encoded[len-1] == '=') && 600 (encoded[len-2] == '=') && 601 (encoded[len-3] == '=')) 602 encoded[len-3] = '\0'; 603 blen = uudecode(encoded, blob, sizeof(blob)); 604 if (blen < 0) 605 fatal("uudecode failed."); 606 if (*private) 607 *k = do_convert_private_ssh2_from_blob(blob, blen); 608 else if ((r = sshkey_from_blob(blob, blen, k)) != 0) 609 fatal("decode blob failed: %s", ssh_err(r)); 610 fclose(fp); 611 } 612 613 static void 614 do_convert_from_pkcs8(struct sshkey **k, int *private) 615 { 616 EVP_PKEY *pubkey; 617 FILE *fp; 618 619 if ((fp = fopen(identity_file, "r")) == NULL) 620 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 621 if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) { 622 fatal("%s: %s is not a recognised public key format", __func__, 623 identity_file); 624 } 625 fclose(fp); 626 switch (EVP_PKEY_type(pubkey->type)) { 627 case EVP_PKEY_RSA: 628 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 629 fatal("sshkey_new failed"); 630 (*k)->type = KEY_RSA; 631 (*k)->rsa = EVP_PKEY_get1_RSA(pubkey); 632 break; 633 case EVP_PKEY_DSA: 634 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 635 fatal("sshkey_new failed"); 636 (*k)->type = KEY_DSA; 637 (*k)->dsa = EVP_PKEY_get1_DSA(pubkey); 638 break; 639 case EVP_PKEY_EC: 640 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 641 fatal("sshkey_new failed"); 642 (*k)->type = KEY_ECDSA; 643 (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey); 644 (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa); 645 break; 646 default: 647 fatal("%s: unsupported pubkey type %d", __func__, 648 EVP_PKEY_type(pubkey->type)); 649 } 650 EVP_PKEY_free(pubkey); 651 return; 652 } 653 654 static void 655 do_convert_from_pem(struct sshkey **k, int *private) 656 { 657 FILE *fp; 658 RSA *rsa; 659 #ifdef notyet 660 DSA *dsa; 661 #endif 662 663 if ((fp = fopen(identity_file, "r")) == NULL) 664 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 665 if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { 666 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 667 fatal("sshkey_new failed"); 668 (*k)->type = KEY_RSA; 669 (*k)->rsa = rsa; 670 fclose(fp); 671 return; 672 } 673 #if notyet /* OpenSSH 0.9.8 lacks this function */ 674 rewind(fp); 675 if ((dsa = PEM_read_DSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { 676 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 677 fatal("sshkey_new failed"); 678 (*k)->type = KEY_DSA; 679 (*k)->dsa = dsa; 680 fclose(fp); 681 return; 682 } 683 /* XXX ECDSA */ 684 #endif 685 fatal("%s: unrecognised raw private key format", __func__); 686 } 687 688 static void 689 do_convert_from(struct passwd *pw) 690 { 691 struct sshkey *k = NULL; 692 int r, private = 0, ok = 0; 693 struct stat st; 694 695 if (!have_identity) 696 ask_filename(pw, "Enter file in which the key is"); 697 if (stat(identity_file, &st) < 0) 698 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 699 700 switch (convert_format) { 701 case FMT_RFC4716: 702 do_convert_from_ssh2(pw, &k, &private); 703 break; 704 case FMT_PKCS8: 705 do_convert_from_pkcs8(&k, &private); 706 break; 707 case FMT_PEM: 708 do_convert_from_pem(&k, &private); 709 break; 710 default: 711 fatal("%s: unknown key format %d", __func__, convert_format); 712 } 713 714 if (!private) { 715 if ((r = sshkey_write(k, stdout)) == 0) 716 ok = 1; 717 if (ok) 718 fprintf(stdout, "\n"); 719 } else { 720 switch (k->type) { 721 case KEY_DSA: 722 ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, 723 NULL, 0, NULL, NULL); 724 break; 725 case KEY_ECDSA: 726 ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL, 727 NULL, 0, NULL, NULL); 728 break; 729 case KEY_RSA: 730 ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, 731 NULL, 0, NULL, NULL); 732 break; 733 default: 734 fatal("%s: unsupported key type %s", __func__, 735 sshkey_type(k)); 736 } 737 } 738 739 if (!ok) 740 fatal("key write failed"); 741 sshkey_free(k); 742 exit(0); 743 } 744 #endif 745 746 static void 747 do_print_public(struct passwd *pw) 748 { 749 struct sshkey *prv; 750 struct stat st; 751 int r; 752 753 if (!have_identity) 754 ask_filename(pw, "Enter file in which the key is"); 755 if (stat(identity_file, &st) < 0) 756 fatal("%s: %s", identity_file, strerror(errno)); 757 prv = load_identity(identity_file); 758 if ((r = sshkey_write(prv, stdout)) != 0) 759 error("sshkey_write failed: %s", ssh_err(r)); 760 sshkey_free(prv); 761 fprintf(stdout, "\n"); 762 exit(0); 763 } 764 765 static void 766 do_download(struct passwd *pw) 767 { 768 #ifdef ENABLE_PKCS11 769 struct sshkey **keys = NULL; 770 int i, nkeys; 771 enum sshkey_fp_rep rep; 772 int fptype; 773 char *fp, *ra; 774 775 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 776 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 777 778 pkcs11_init(0); 779 nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys); 780 if (nkeys <= 0) 781 fatal("cannot read public key from pkcs11"); 782 for (i = 0; i < nkeys; i++) { 783 if (print_fingerprint) { 784 fp = sshkey_fingerprint(keys[i], fptype, rep); 785 ra = sshkey_fingerprint(keys[i], fingerprint_hash, 786 SSH_FP_RANDOMART); 787 if (fp == NULL || ra == NULL) 788 fatal("%s: sshkey_fingerprint fail", __func__); 789 printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]), 790 fp, sshkey_type(keys[i])); 791 if (log_level >= SYSLOG_LEVEL_VERBOSE) 792 printf("%s\n", ra); 793 free(ra); 794 free(fp); 795 } else { 796 (void) sshkey_write(keys[i], stdout); /* XXX check */ 797 fprintf(stdout, "\n"); 798 } 799 sshkey_free(keys[i]); 800 } 801 free(keys); 802 pkcs11_terminate(); 803 exit(0); 804 #else 805 fatal("no pkcs11 support"); 806 #endif /* ENABLE_PKCS11 */ 807 } 808 809 static struct sshkey * 810 try_read_key(char **cpp) 811 { 812 struct sshkey *ret; 813 int r; 814 815 if ((ret = sshkey_new(KEY_UNSPEC)) == NULL) 816 fatal("sshkey_new failed"); 817 if ((r = sshkey_read(ret, cpp)) == 0) 818 return ret; 819 /* Not a key */ 820 sshkey_free(ret); 821 return NULL; 822 } 823 824 static void 825 fingerprint_one_key(const struct sshkey *public, const char *comment) 826 { 827 char *fp = NULL, *ra = NULL; 828 enum sshkey_fp_rep rep; 829 int fptype; 830 831 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 832 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 833 fp = sshkey_fingerprint(public, fptype, rep); 834 ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART); 835 if (fp == NULL || ra == NULL) 836 fatal("%s: sshkey_fingerprint failed", __func__); 837 mprintf("%u %s %s (%s)\n", sshkey_size(public), fp, 838 comment ? comment : "no comment", sshkey_type(public)); 839 if (log_level >= SYSLOG_LEVEL_VERBOSE) 840 printf("%s\n", ra); 841 free(ra); 842 free(fp); 843 } 844 845 static void 846 fingerprint_private(const char *path) 847 { 848 struct stat st; 849 char *comment = NULL; 850 struct sshkey *public = NULL; 851 int r; 852 853 if (stat(identity_file, &st) < 0) 854 fatal("%s: %s", path, strerror(errno)); 855 if ((r = sshkey_load_public(path, &public, &comment)) != 0) { 856 debug("load public \"%s\": %s", path, ssh_err(r)); 857 if ((r = sshkey_load_private(path, NULL, 858 &public, &comment)) != 0) { 859 debug("load private \"%s\": %s", path, ssh_err(r)); 860 fatal("%s is not a key file.", path); 861 } 862 } 863 864 fingerprint_one_key(public, comment); 865 sshkey_free(public); 866 free(comment); 867 } 868 869 static void 870 do_fingerprint(struct passwd *pw) 871 { 872 FILE *f; 873 struct sshkey *public = NULL; 874 char *comment = NULL, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES]; 875 int i, invalid = 1; 876 const char *path; 877 u_long lnum = 0; 878 879 if (!have_identity) 880 ask_filename(pw, "Enter file in which the key is"); 881 path = identity_file; 882 883 if (strcmp(identity_file, "-") == 0) { 884 f = stdin; 885 path = "(stdin)"; 886 } else if ((f = fopen(path, "r")) == NULL) 887 fatal("%s: %s: %s", __progname, path, strerror(errno)); 888 889 while (read_keyfile_line(f, path, line, sizeof(line), &lnum) == 0) { 890 cp = line; 891 cp[strcspn(cp, "\n")] = '\0'; 892 /* Trim leading space and comments */ 893 cp = line + strspn(line, " \t"); 894 if (*cp == '#' || *cp == '\0') 895 continue; 896 897 /* 898 * Input may be plain keys, private keys, authorized_keys 899 * or known_hosts. 900 */ 901 902 /* 903 * Try private keys first. Assume a key is private if 904 * "SSH PRIVATE KEY" appears on the first line and we're 905 * not reading from stdin (XXX support private keys on stdin). 906 */ 907 if (lnum == 1 && strcmp(identity_file, "-") != 0 && 908 strstr(cp, "PRIVATE KEY") != NULL) { 909 fclose(f); 910 fingerprint_private(path); 911 exit(0); 912 } 913 914 /* 915 * If it's not a private key, then this must be prepared to 916 * accept a public key prefixed with a hostname or options. 917 * Try a bare key first, otherwise skip the leading stuff. 918 */ 919 if ((public = try_read_key(&cp)) == NULL) { 920 i = strtol(cp, &ep, 10); 921 if (i == 0 || ep == NULL || 922 (*ep != ' ' && *ep != '\t')) { 923 int quoted = 0; 924 925 comment = cp; 926 for (; *cp && (quoted || (*cp != ' ' && 927 *cp != '\t')); cp++) { 928 if (*cp == '\\' && cp[1] == '"') 929 cp++; /* Skip both */ 930 else if (*cp == '"') 931 quoted = !quoted; 932 } 933 if (!*cp) 934 continue; 935 *cp++ = '\0'; 936 } 937 } 938 /* Retry after parsing leading hostname/key options */ 939 if (public == NULL && (public = try_read_key(&cp)) == NULL) { 940 debug("%s:%lu: not a public key", path, lnum); 941 continue; 942 } 943 944 /* Find trailing comment, if any */ 945 for (; *cp == ' ' || *cp == '\t'; cp++) 946 ; 947 if (*cp != '\0' && *cp != '#') 948 comment = cp; 949 950 fingerprint_one_key(public, comment); 951 sshkey_free(public); 952 invalid = 0; /* One good key in the file is sufficient */ 953 } 954 fclose(f); 955 956 if (invalid) 957 fatal("%s is not a public key file.", path); 958 exit(0); 959 } 960 961 static void 962 do_gen_all_hostkeys(struct passwd *pw) 963 { 964 struct { 965 char *key_type; 966 char *key_type_display; 967 char *path; 968 } key_types[] = { 969 #ifdef WITH_OPENSSL 970 { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE }, 971 { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE }, 972 { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE }, 973 #endif /* WITH_OPENSSL */ 974 { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE }, 975 { NULL, NULL, NULL } 976 }; 977 978 int first = 0; 979 struct stat st; 980 struct sshkey *private, *public; 981 char comment[1024]; 982 int i, type, fd, r; 983 FILE *f; 984 985 for (i = 0; key_types[i].key_type; i++) { 986 if (stat(key_types[i].path, &st) == 0) 987 continue; 988 if (errno != ENOENT) { 989 error("Could not stat %s: %s", key_types[i].path, 990 strerror(errno)); 991 first = 0; 992 continue; 993 } 994 995 if (first == 0) { 996 first = 1; 997 printf("%s: generating new host keys: ", __progname); 998 } 999 printf("%s ", key_types[i].key_type_display); 1000 fflush(stdout); 1001 type = sshkey_type_from_name(key_types[i].key_type); 1002 strlcpy(identity_file, key_types[i].path, sizeof(identity_file)); 1003 bits = 0; 1004 type_bits_valid(type, NULL, &bits); 1005 if ((r = sshkey_generate(type, bits, &private)) != 0) { 1006 error("sshkey_generate failed: %s", ssh_err(r)); 1007 first = 0; 1008 continue; 1009 } 1010 if ((r = sshkey_from_private(private, &public)) != 0) 1011 fatal("sshkey_from_private failed: %s", ssh_err(r)); 1012 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, 1013 hostname); 1014 if ((r = sshkey_save_private(private, identity_file, "", 1015 comment, use_new_format, new_format_cipher, rounds)) != 0) { 1016 error("Saving key \"%s\" failed: %s", 1017 identity_file, ssh_err(r)); 1018 sshkey_free(private); 1019 sshkey_free(public); 1020 first = 0; 1021 continue; 1022 } 1023 sshkey_free(private); 1024 strlcat(identity_file, ".pub", sizeof(identity_file)); 1025 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 1026 if (fd == -1) { 1027 error("Could not save your public key in %s", 1028 identity_file); 1029 sshkey_free(public); 1030 first = 0; 1031 continue; 1032 } 1033 f = fdopen(fd, "w"); 1034 if (f == NULL) { 1035 error("fdopen %s failed", identity_file); 1036 close(fd); 1037 sshkey_free(public); 1038 first = 0; 1039 continue; 1040 } 1041 if ((r = sshkey_write(public, f)) != 0) { 1042 error("write key failed: %s", ssh_err(r)); 1043 fclose(f); 1044 sshkey_free(public); 1045 first = 0; 1046 continue; 1047 } 1048 fprintf(f, " %s\n", comment); 1049 fclose(f); 1050 sshkey_free(public); 1051 1052 } 1053 if (first != 0) 1054 printf("\n"); 1055 } 1056 1057 struct known_hosts_ctx { 1058 const char *host; /* Hostname searched for in find/delete case */ 1059 FILE *out; /* Output file, stdout for find_hosts case */ 1060 int has_unhashed; /* When hashing, original had unhashed hosts */ 1061 int found_key; /* For find/delete, host was found */ 1062 int invalid; /* File contained invalid items; don't delete */ 1063 }; 1064 1065 static int 1066 known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx) 1067 { 1068 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1069 char *hashed, *cp, *hosts, *ohosts; 1070 int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts); 1071 int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM; 1072 1073 switch (l->status) { 1074 case HKF_STATUS_OK: 1075 case HKF_STATUS_MATCHED: 1076 /* 1077 * Don't hash hosts already already hashed, with wildcard 1078 * characters or a CA/revocation marker. 1079 */ 1080 if (was_hashed || has_wild || l->marker != MRK_NONE) { 1081 fprintf(ctx->out, "%s\n", l->line); 1082 if (has_wild && !find_host) { 1083 logit("%s:%lu: ignoring host name " 1084 "with wildcard: %.64s", l->path, 1085 l->linenum, l->hosts); 1086 } 1087 return 0; 1088 } 1089 /* 1090 * Split any comma-separated hostnames from the host list, 1091 * hash and store separately. 1092 */ 1093 ohosts = hosts = xstrdup(l->hosts); 1094 while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') { 1095 lowercase(cp); 1096 if ((hashed = host_hash(cp, NULL, 0)) == NULL) 1097 fatal("hash_host failed"); 1098 fprintf(ctx->out, "%s %s\n", hashed, l->rawkey); 1099 ctx->has_unhashed = 1; 1100 } 1101 free(ohosts); 1102 return 0; 1103 case HKF_STATUS_INVALID: 1104 /* Retain invalid lines, but mark file as invalid. */ 1105 ctx->invalid = 1; 1106 logit("%s:%lu: invalid line", l->path, l->linenum); 1107 /* FALLTHROUGH */ 1108 default: 1109 fprintf(ctx->out, "%s\n", l->line); 1110 return 0; 1111 } 1112 /* NOTREACHED */ 1113 return -1; 1114 } 1115 1116 static int 1117 known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx) 1118 { 1119 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1120 enum sshkey_fp_rep rep; 1121 int fptype; 1122 char *fp; 1123 1124 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 1125 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 1126 1127 if (l->status == HKF_STATUS_MATCHED) { 1128 if (delete_host) { 1129 if (l->marker != MRK_NONE) { 1130 /* Don't remove CA and revocation lines */ 1131 fprintf(ctx->out, "%s\n", l->line); 1132 } else { 1133 /* 1134 * Hostname matches and has no CA/revoke 1135 * marker, delete it by *not* writing the 1136 * line to ctx->out. 1137 */ 1138 ctx->found_key = 1; 1139 if (!quiet) 1140 printf("# Host %s found: line %lu\n", 1141 ctx->host, l->linenum); 1142 } 1143 return 0; 1144 } else if (find_host) { 1145 ctx->found_key = 1; 1146 if (!quiet) { 1147 printf("# Host %s found: line %lu %s\n", 1148 ctx->host, 1149 l->linenum, l->marker == MRK_CA ? "CA" : 1150 (l->marker == MRK_REVOKE ? "REVOKED" : "")); 1151 } 1152 if (hash_hosts) 1153 known_hosts_hash(l, ctx); 1154 else if (print_fingerprint) { 1155 fp = sshkey_fingerprint(l->key, fptype, rep); 1156 mprintf("%s %s %s %s\n", ctx->host, 1157 sshkey_type(l->key), fp, l->comment); 1158 free(fp); 1159 } else 1160 fprintf(ctx->out, "%s\n", l->line); 1161 return 0; 1162 } 1163 } else if (delete_host) { 1164 /* Retain non-matching hosts when deleting */ 1165 if (l->status == HKF_STATUS_INVALID) { 1166 ctx->invalid = 1; 1167 logit("%s:%lu: invalid line", l->path, l->linenum); 1168 } 1169 fprintf(ctx->out, "%s\n", l->line); 1170 } 1171 return 0; 1172 } 1173 1174 static void 1175 do_known_hosts(struct passwd *pw, const char *name) 1176 { 1177 char *cp, tmp[PATH_MAX], old[PATH_MAX]; 1178 int r, fd, oerrno, inplace = 0; 1179 struct known_hosts_ctx ctx; 1180 u_int foreach_options; 1181 1182 if (!have_identity) { 1183 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); 1184 if (strlcpy(identity_file, cp, sizeof(identity_file)) >= 1185 sizeof(identity_file)) 1186 fatal("Specified known hosts path too long"); 1187 free(cp); 1188 have_identity = 1; 1189 } 1190 1191 memset(&ctx, 0, sizeof(ctx)); 1192 ctx.out = stdout; 1193 ctx.host = name; 1194 1195 /* 1196 * Find hosts goes to stdout, hash and deletions happen in-place 1197 * A corner case is ssh-keygen -HF foo, which should go to stdout 1198 */ 1199 if (!find_host && (hash_hosts || delete_host)) { 1200 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || 1201 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || 1202 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || 1203 strlcat(old, ".old", sizeof(old)) >= sizeof(old)) 1204 fatal("known_hosts path too long"); 1205 umask(077); 1206 if ((fd = mkstemp(tmp)) == -1) 1207 fatal("mkstemp: %s", strerror(errno)); 1208 if ((ctx.out = fdopen(fd, "w")) == NULL) { 1209 oerrno = errno; 1210 unlink(tmp); 1211 fatal("fdopen: %s", strerror(oerrno)); 1212 } 1213 inplace = 1; 1214 } 1215 1216 /* XXX support identity_file == "-" for stdin */ 1217 foreach_options = find_host ? HKF_WANT_MATCH : 0; 1218 foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0; 1219 if ((r = hostkeys_foreach(identity_file, 1220 hash_hosts ? known_hosts_hash : known_hosts_find_delete, &ctx, 1221 name, NULL, foreach_options)) != 0) { 1222 if (inplace) 1223 unlink(tmp); 1224 fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r)); 1225 } 1226 1227 if (inplace) 1228 fclose(ctx.out); 1229 1230 if (ctx.invalid) { 1231 error("%s is not a valid known_hosts file.", identity_file); 1232 if (inplace) { 1233 error("Not replacing existing known_hosts " 1234 "file because of errors"); 1235 unlink(tmp); 1236 } 1237 exit(1); 1238 } else if (delete_host && !ctx.found_key) { 1239 logit("Host %s not found in %s", name, identity_file); 1240 if (inplace) 1241 unlink(tmp); 1242 } else if (inplace) { 1243 /* Backup existing file */ 1244 if (unlink(old) == -1 && errno != ENOENT) 1245 fatal("unlink %.100s: %s", old, strerror(errno)); 1246 if (link(identity_file, old) == -1) 1247 fatal("link %.100s to %.100s: %s", identity_file, old, 1248 strerror(errno)); 1249 /* Move new one into place */ 1250 if (rename(tmp, identity_file) == -1) { 1251 error("rename\"%s\" to \"%s\": %s", tmp, identity_file, 1252 strerror(errno)); 1253 unlink(tmp); 1254 unlink(old); 1255 exit(1); 1256 } 1257 1258 printf("%s updated.\n", identity_file); 1259 printf("Original contents retained as %s\n", old); 1260 if (ctx.has_unhashed) { 1261 logit("WARNING: %s contains unhashed entries", old); 1262 logit("Delete this file to ensure privacy " 1263 "of hostnames"); 1264 } 1265 } 1266 1267 exit (find_host && !ctx.found_key); 1268 } 1269 1270 /* 1271 * Perform changing a passphrase. The argument is the passwd structure 1272 * for the current user. 1273 */ 1274 static void 1275 do_change_passphrase(struct passwd *pw) 1276 { 1277 char *comment; 1278 char *old_passphrase, *passphrase1, *passphrase2; 1279 struct stat st; 1280 struct sshkey *private; 1281 int r; 1282 1283 if (!have_identity) 1284 ask_filename(pw, "Enter file in which the key is"); 1285 if (stat(identity_file, &st) < 0) 1286 fatal("%s: %s", identity_file, strerror(errno)); 1287 /* Try to load the file with empty passphrase. */ 1288 r = sshkey_load_private(identity_file, "", &private, &comment); 1289 if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) { 1290 if (identity_passphrase) 1291 old_passphrase = xstrdup(identity_passphrase); 1292 else 1293 old_passphrase = 1294 read_passphrase("Enter old passphrase: ", 1295 RP_ALLOW_STDIN); 1296 r = sshkey_load_private(identity_file, old_passphrase, 1297 &private, &comment); 1298 explicit_bzero(old_passphrase, strlen(old_passphrase)); 1299 free(old_passphrase); 1300 if (r != 0) 1301 goto badkey; 1302 } else if (r != 0) { 1303 badkey: 1304 fatal("Failed to load key %s: %s", identity_file, ssh_err(r)); 1305 } 1306 if (comment) 1307 mprintf("Key has comment '%s'\n", comment); 1308 1309 /* Ask the new passphrase (twice). */ 1310 if (identity_new_passphrase) { 1311 passphrase1 = xstrdup(identity_new_passphrase); 1312 passphrase2 = NULL; 1313 } else { 1314 passphrase1 = 1315 read_passphrase("Enter new passphrase (empty for no " 1316 "passphrase): ", RP_ALLOW_STDIN); 1317 passphrase2 = read_passphrase("Enter same passphrase again: ", 1318 RP_ALLOW_STDIN); 1319 1320 /* Verify that they are the same. */ 1321 if (strcmp(passphrase1, passphrase2) != 0) { 1322 explicit_bzero(passphrase1, strlen(passphrase1)); 1323 explicit_bzero(passphrase2, strlen(passphrase2)); 1324 free(passphrase1); 1325 free(passphrase2); 1326 printf("Pass phrases do not match. Try again.\n"); 1327 exit(1); 1328 } 1329 /* Destroy the other copy. */ 1330 explicit_bzero(passphrase2, strlen(passphrase2)); 1331 free(passphrase2); 1332 } 1333 1334 /* Save the file using the new passphrase. */ 1335 if ((r = sshkey_save_private(private, identity_file, passphrase1, 1336 comment, use_new_format, new_format_cipher, rounds)) != 0) { 1337 error("Saving key \"%s\" failed: %s.", 1338 identity_file, ssh_err(r)); 1339 explicit_bzero(passphrase1, strlen(passphrase1)); 1340 free(passphrase1); 1341 sshkey_free(private); 1342 free(comment); 1343 exit(1); 1344 } 1345 /* Destroy the passphrase and the copy of the key in memory. */ 1346 explicit_bzero(passphrase1, strlen(passphrase1)); 1347 free(passphrase1); 1348 sshkey_free(private); /* Destroys contents */ 1349 free(comment); 1350 1351 printf("Your identification has been saved with the new passphrase.\n"); 1352 exit(0); 1353 } 1354 1355 /* 1356 * Print the SSHFP RR. 1357 */ 1358 static int 1359 do_print_resource_record(struct passwd *pw, char *fname, char *hname) 1360 { 1361 struct sshkey *public; 1362 char *comment = NULL; 1363 struct stat st; 1364 int r; 1365 1366 if (fname == NULL) 1367 fatal("%s: no filename", __func__); 1368 if (stat(fname, &st) < 0) { 1369 if (errno == ENOENT) 1370 return 0; 1371 fatal("%s: %s", fname, strerror(errno)); 1372 } 1373 if ((r = sshkey_load_public(fname, &public, &comment)) != 0) 1374 fatal("Failed to read v2 public key from \"%s\": %s.", 1375 fname, ssh_err(r)); 1376 export_dns_rr(hname, public, stdout, print_generic); 1377 sshkey_free(public); 1378 free(comment); 1379 return 1; 1380 } 1381 1382 /* 1383 * Change the comment of a private key file. 1384 */ 1385 static void 1386 do_change_comment(struct passwd *pw) 1387 { 1388 char new_comment[1024], *comment, *passphrase; 1389 struct sshkey *private; 1390 struct sshkey *public; 1391 struct stat st; 1392 FILE *f; 1393 int r, fd; 1394 1395 if (!have_identity) 1396 ask_filename(pw, "Enter file in which the key is"); 1397 if (stat(identity_file, &st) < 0) 1398 fatal("%s: %s", identity_file, strerror(errno)); 1399 if ((r = sshkey_load_private(identity_file, "", 1400 &private, &comment)) == 0) 1401 passphrase = xstrdup(""); 1402 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 1403 fatal("Cannot load private key \"%s\": %s.", 1404 identity_file, ssh_err(r)); 1405 else { 1406 if (identity_passphrase) 1407 passphrase = xstrdup(identity_passphrase); 1408 else if (identity_new_passphrase) 1409 passphrase = xstrdup(identity_new_passphrase); 1410 else 1411 passphrase = read_passphrase("Enter passphrase: ", 1412 RP_ALLOW_STDIN); 1413 /* Try to load using the passphrase. */ 1414 if ((r = sshkey_load_private(identity_file, passphrase, 1415 &private, &comment)) != 0) { 1416 explicit_bzero(passphrase, strlen(passphrase)); 1417 free(passphrase); 1418 fatal("Cannot load private key \"%s\": %s.", 1419 identity_file, ssh_err(r)); 1420 } 1421 } 1422 1423 if (private->type != KEY_ED25519 && !use_new_format) { 1424 error("Comments are only supported for keys stored in " 1425 "the new format (-o)."); 1426 explicit_bzero(passphrase, strlen(passphrase)); 1427 sshkey_free(private); 1428 exit(1); 1429 } 1430 if (comment) 1431 printf("Key now has comment '%s'\n", comment); 1432 else 1433 printf("Key now has no comment\n"); 1434 1435 if (identity_comment) { 1436 strlcpy(new_comment, identity_comment, sizeof(new_comment)); 1437 } else { 1438 printf("Enter new comment: "); 1439 fflush(stdout); 1440 if (!fgets(new_comment, sizeof(new_comment), stdin)) { 1441 explicit_bzero(passphrase, strlen(passphrase)); 1442 sshkey_free(private); 1443 exit(1); 1444 } 1445 new_comment[strcspn(new_comment, "\n")] = '\0'; 1446 } 1447 1448 /* Save the file using the new passphrase. */ 1449 if ((r = sshkey_save_private(private, identity_file, passphrase, 1450 new_comment, use_new_format, new_format_cipher, rounds)) != 0) { 1451 error("Saving key \"%s\" failed: %s", 1452 identity_file, ssh_err(r)); 1453 explicit_bzero(passphrase, strlen(passphrase)); 1454 free(passphrase); 1455 sshkey_free(private); 1456 free(comment); 1457 exit(1); 1458 } 1459 explicit_bzero(passphrase, strlen(passphrase)); 1460 free(passphrase); 1461 if ((r = sshkey_from_private(private, &public)) != 0) 1462 fatal("sshkey_from_private failed: %s", ssh_err(r)); 1463 sshkey_free(private); 1464 1465 strlcat(identity_file, ".pub", sizeof(identity_file)); 1466 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 1467 if (fd == -1) 1468 fatal("Could not save your public key in %s", identity_file); 1469 f = fdopen(fd, "w"); 1470 if (f == NULL) 1471 fatal("fdopen %s failed: %s", identity_file, strerror(errno)); 1472 if ((r = sshkey_write(public, f)) != 0) 1473 fatal("write key failed: %s", ssh_err(r)); 1474 sshkey_free(public); 1475 fprintf(f, " %s\n", new_comment); 1476 fclose(f); 1477 1478 free(comment); 1479 1480 printf("The comment in your key file has been changed.\n"); 1481 exit(0); 1482 } 1483 1484 static void 1485 add_flag_option(struct sshbuf *c, const char *name) 1486 { 1487 int r; 1488 1489 debug3("%s: %s", __func__, name); 1490 if ((r = sshbuf_put_cstring(c, name)) != 0 || 1491 (r = sshbuf_put_string(c, NULL, 0)) != 0) 1492 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1493 } 1494 1495 static void 1496 add_string_option(struct sshbuf *c, const char *name, const char *value) 1497 { 1498 struct sshbuf *b; 1499 int r; 1500 1501 debug3("%s: %s=%s", __func__, name, value); 1502 if ((b = sshbuf_new()) == NULL) 1503 fatal("%s: sshbuf_new failed", __func__); 1504 if ((r = sshbuf_put_cstring(b, value)) != 0 || 1505 (r = sshbuf_put_cstring(c, name)) != 0 || 1506 (r = sshbuf_put_stringb(c, b)) != 0) 1507 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1508 1509 sshbuf_free(b); 1510 } 1511 1512 #define OPTIONS_CRITICAL 1 1513 #define OPTIONS_EXTENSIONS 2 1514 static void 1515 prepare_options_buf(struct sshbuf *c, int which) 1516 { 1517 size_t i; 1518 1519 sshbuf_reset(c); 1520 if ((which & OPTIONS_CRITICAL) != 0 && 1521 certflags_command != NULL) 1522 add_string_option(c, "force-command", certflags_command); 1523 if ((which & OPTIONS_EXTENSIONS) != 0 && 1524 (certflags_flags & CERTOPT_X_FWD) != 0) 1525 add_flag_option(c, "permit-X11-forwarding"); 1526 if ((which & OPTIONS_EXTENSIONS) != 0 && 1527 (certflags_flags & CERTOPT_AGENT_FWD) != 0) 1528 add_flag_option(c, "permit-agent-forwarding"); 1529 if ((which & OPTIONS_EXTENSIONS) != 0 && 1530 (certflags_flags & CERTOPT_PORT_FWD) != 0) 1531 add_flag_option(c, "permit-port-forwarding"); 1532 if ((which & OPTIONS_EXTENSIONS) != 0 && 1533 (certflags_flags & CERTOPT_PTY) != 0) 1534 add_flag_option(c, "permit-pty"); 1535 if ((which & OPTIONS_EXTENSIONS) != 0 && 1536 (certflags_flags & CERTOPT_USER_RC) != 0) 1537 add_flag_option(c, "permit-user-rc"); 1538 if ((which & OPTIONS_CRITICAL) != 0 && 1539 certflags_src_addr != NULL) 1540 add_string_option(c, "source-address", certflags_src_addr); 1541 for (i = 0; i < ncert_userext; i++) { 1542 if ((cert_userext[i].crit && (which & OPTIONS_EXTENSIONS)) || 1543 (!cert_userext[i].crit && (which & OPTIONS_CRITICAL))) 1544 continue; 1545 if (cert_userext[i].val == NULL) 1546 add_flag_option(c, cert_userext[i].key); 1547 else { 1548 add_string_option(c, cert_userext[i].key, 1549 cert_userext[i].val); 1550 } 1551 } 1552 } 1553 1554 static struct sshkey * 1555 load_pkcs11_key(char *path) 1556 { 1557 #ifdef ENABLE_PKCS11 1558 struct sshkey **keys = NULL, *public, *private = NULL; 1559 int r, i, nkeys; 1560 1561 if ((r = sshkey_load_public(path, &public, NULL)) != 0) 1562 fatal("Couldn't load CA public key \"%s\": %s", 1563 path, ssh_err(r)); 1564 1565 nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys); 1566 debug3("%s: %d keys", __func__, nkeys); 1567 if (nkeys <= 0) 1568 fatal("cannot read public key from pkcs11"); 1569 for (i = 0; i < nkeys; i++) { 1570 if (sshkey_equal_public(public, keys[i])) { 1571 private = keys[i]; 1572 continue; 1573 } 1574 sshkey_free(keys[i]); 1575 } 1576 free(keys); 1577 sshkey_free(public); 1578 return private; 1579 #else 1580 fatal("no pkcs11 support"); 1581 #endif /* ENABLE_PKCS11 */ 1582 } 1583 1584 static void 1585 do_ca_sign(struct passwd *pw, int argc, char **argv) 1586 { 1587 int r, i, fd; 1588 u_int n; 1589 struct sshkey *ca, *public; 1590 char valid[64], *otmp, *tmp, *cp, *out, *comment, **plist = NULL; 1591 FILE *f; 1592 1593 #ifdef ENABLE_PKCS11 1594 pkcs11_init(1); 1595 #endif 1596 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 1597 if (pkcs11provider != NULL) { 1598 if ((ca = load_pkcs11_key(tmp)) == NULL) 1599 fatal("No PKCS#11 key matching %s found", ca_key_path); 1600 } else 1601 ca = load_identity(tmp); 1602 free(tmp); 1603 1604 if (key_type_name != NULL && 1605 sshkey_type_from_name(key_type_name) != ca->type) { 1606 fatal("CA key type %s doesn't match specified %s", 1607 sshkey_ssh_name(ca), key_type_name); 1608 } 1609 1610 for (i = 0; i < argc; i++) { 1611 /* Split list of principals */ 1612 n = 0; 1613 if (cert_principals != NULL) { 1614 otmp = tmp = xstrdup(cert_principals); 1615 plist = NULL; 1616 for (; (cp = strsep(&tmp, ",")) != NULL; n++) { 1617 plist = xreallocarray(plist, n + 1, sizeof(*plist)); 1618 if (*(plist[n] = xstrdup(cp)) == '\0') 1619 fatal("Empty principal name"); 1620 } 1621 free(otmp); 1622 } 1623 1624 tmp = tilde_expand_filename(argv[i], pw->pw_uid); 1625 if ((r = sshkey_load_public(tmp, &public, &comment)) != 0) 1626 fatal("%s: unable to open \"%s\": %s", 1627 __func__, tmp, ssh_err(r)); 1628 if (public->type != KEY_RSA && public->type != KEY_DSA && 1629 public->type != KEY_ECDSA && public->type != KEY_ED25519) 1630 fatal("%s: key \"%s\" type %s cannot be certified", 1631 __func__, tmp, sshkey_type(public)); 1632 1633 /* Prepare certificate to sign */ 1634 if ((r = sshkey_to_certified(public)) != 0) 1635 fatal("Could not upgrade key %s to certificate: %s", 1636 tmp, ssh_err(r)); 1637 public->cert->type = cert_key_type; 1638 public->cert->serial = (u_int64_t)cert_serial; 1639 public->cert->key_id = xstrdup(cert_key_id); 1640 public->cert->nprincipals = n; 1641 public->cert->principals = plist; 1642 public->cert->valid_after = cert_valid_from; 1643 public->cert->valid_before = cert_valid_to; 1644 prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL); 1645 prepare_options_buf(public->cert->extensions, 1646 OPTIONS_EXTENSIONS); 1647 if ((r = sshkey_from_private(ca, 1648 &public->cert->signature_key)) != 0) 1649 fatal("sshkey_from_private (ca key): %s", ssh_err(r)); 1650 1651 if ((r = sshkey_certify(public, ca, key_type_name)) != 0) 1652 fatal("Couldn't certify key %s: %s", tmp, ssh_err(r)); 1653 1654 if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0) 1655 *cp = '\0'; 1656 xasprintf(&out, "%s-cert.pub", tmp); 1657 free(tmp); 1658 1659 if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 1660 fatal("Could not open \"%s\" for writing: %s", out, 1661 strerror(errno)); 1662 if ((f = fdopen(fd, "w")) == NULL) 1663 fatal("%s: fdopen: %s", __func__, strerror(errno)); 1664 if ((r = sshkey_write(public, f)) != 0) 1665 fatal("Could not write certified key to %s: %s", 1666 out, ssh_err(r)); 1667 fprintf(f, " %s\n", comment); 1668 fclose(f); 1669 1670 if (!quiet) { 1671 sshkey_format_cert_validity(public->cert, 1672 valid, sizeof(valid)); 1673 logit("Signed %s key %s: id \"%s\" serial %llu%s%s " 1674 "valid %s", sshkey_cert_type(public), 1675 out, public->cert->key_id, 1676 (unsigned long long)public->cert->serial, 1677 cert_principals != NULL ? " for " : "", 1678 cert_principals != NULL ? cert_principals : "", 1679 valid); 1680 } 1681 1682 sshkey_free(public); 1683 free(out); 1684 } 1685 #ifdef ENABLE_PKCS11 1686 pkcs11_terminate(); 1687 #endif 1688 exit(0); 1689 } 1690 1691 static u_int64_t 1692 parse_relative_time(const char *s, time_t now) 1693 { 1694 int64_t mul, secs; 1695 1696 mul = *s == '-' ? -1 : 1; 1697 1698 if ((secs = convtime(s + 1)) == -1) 1699 fatal("Invalid relative certificate time %s", s); 1700 if (mul == -1 && secs > now) 1701 fatal("Certificate time %s cannot be represented", s); 1702 return now + (u_int64_t)(secs * mul); 1703 } 1704 1705 static u_int64_t 1706 parse_absolute_time(const char *s) 1707 { 1708 struct tm tm; 1709 time_t tt; 1710 char buf[32], *fmt; 1711 1712 /* 1713 * POSIX strptime says "The application shall ensure that there 1714 * is white-space or other non-alphanumeric characters between 1715 * any two conversion specifications" so arrange things this way. 1716 */ 1717 switch (strlen(s)) { 1718 case 8: 1719 fmt = "%Y-%m-%d"; 1720 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6); 1721 break; 1722 case 14: 1723 fmt = "%Y-%m-%dT%H:%M:%S"; 1724 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s", 1725 s, s + 4, s + 6, s + 8, s + 10, s + 12); 1726 break; 1727 default: 1728 fatal("Invalid certificate time format %s", s); 1729 } 1730 1731 memset(&tm, 0, sizeof(tm)); 1732 if (strptime(buf, fmt, &tm) == NULL) 1733 fatal("Invalid certificate time %s", s); 1734 if ((tt = mktime(&tm)) < 0) 1735 fatal("Certificate time %s cannot be represented", s); 1736 return (u_int64_t)tt; 1737 } 1738 1739 static void 1740 parse_cert_times(char *timespec) 1741 { 1742 char *from, *to; 1743 time_t now = time(NULL); 1744 int64_t secs; 1745 1746 /* +timespec relative to now */ 1747 if (*timespec == '+' && strchr(timespec, ':') == NULL) { 1748 if ((secs = convtime(timespec + 1)) == -1) 1749 fatal("Invalid relative certificate life %s", timespec); 1750 cert_valid_to = now + secs; 1751 /* 1752 * Backdate certificate one minute to avoid problems on hosts 1753 * with poorly-synchronised clocks. 1754 */ 1755 cert_valid_from = ((now - 59)/ 60) * 60; 1756 return; 1757 } 1758 1759 /* 1760 * from:to, where 1761 * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS 1762 * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS 1763 */ 1764 from = xstrdup(timespec); 1765 to = strchr(from, ':'); 1766 if (to == NULL || from == to || *(to + 1) == '\0') 1767 fatal("Invalid certificate life specification %s", timespec); 1768 *to++ = '\0'; 1769 1770 if (*from == '-' || *from == '+') 1771 cert_valid_from = parse_relative_time(from, now); 1772 else 1773 cert_valid_from = parse_absolute_time(from); 1774 1775 if (*to == '-' || *to == '+') 1776 cert_valid_to = parse_relative_time(to, now); 1777 else 1778 cert_valid_to = parse_absolute_time(to); 1779 1780 if (cert_valid_to <= cert_valid_from) 1781 fatal("Empty certificate validity interval"); 1782 free(from); 1783 } 1784 1785 static void 1786 add_cert_option(char *opt) 1787 { 1788 char *val, *cp; 1789 int iscrit = 0; 1790 1791 if (strcasecmp(opt, "clear") == 0) 1792 certflags_flags = 0; 1793 else if (strcasecmp(opt, "no-x11-forwarding") == 0) 1794 certflags_flags &= ~CERTOPT_X_FWD; 1795 else if (strcasecmp(opt, "permit-x11-forwarding") == 0) 1796 certflags_flags |= CERTOPT_X_FWD; 1797 else if (strcasecmp(opt, "no-agent-forwarding") == 0) 1798 certflags_flags &= ~CERTOPT_AGENT_FWD; 1799 else if (strcasecmp(opt, "permit-agent-forwarding") == 0) 1800 certflags_flags |= CERTOPT_AGENT_FWD; 1801 else if (strcasecmp(opt, "no-port-forwarding") == 0) 1802 certflags_flags &= ~CERTOPT_PORT_FWD; 1803 else if (strcasecmp(opt, "permit-port-forwarding") == 0) 1804 certflags_flags |= CERTOPT_PORT_FWD; 1805 else if (strcasecmp(opt, "no-pty") == 0) 1806 certflags_flags &= ~CERTOPT_PTY; 1807 else if (strcasecmp(opt, "permit-pty") == 0) 1808 certflags_flags |= CERTOPT_PTY; 1809 else if (strcasecmp(opt, "no-user-rc") == 0) 1810 certflags_flags &= ~CERTOPT_USER_RC; 1811 else if (strcasecmp(opt, "permit-user-rc") == 0) 1812 certflags_flags |= CERTOPT_USER_RC; 1813 else if (strncasecmp(opt, "force-command=", 14) == 0) { 1814 val = opt + 14; 1815 if (*val == '\0') 1816 fatal("Empty force-command option"); 1817 if (certflags_command != NULL) 1818 fatal("force-command already specified"); 1819 certflags_command = xstrdup(val); 1820 } else if (strncasecmp(opt, "source-address=", 15) == 0) { 1821 val = opt + 15; 1822 if (*val == '\0') 1823 fatal("Empty source-address option"); 1824 if (certflags_src_addr != NULL) 1825 fatal("source-address already specified"); 1826 if (addr_match_cidr_list(NULL, val) != 0) 1827 fatal("Invalid source-address list"); 1828 certflags_src_addr = xstrdup(val); 1829 } else if (strncasecmp(opt, "extension:", 10) == 0 || 1830 (iscrit = (strncasecmp(opt, "critical:", 9) == 0))) { 1831 val = xstrdup(strchr(opt, ':') + 1); 1832 if ((cp = strchr(val, '=')) != NULL) 1833 *cp++ = '\0'; 1834 cert_userext = xreallocarray(cert_userext, ncert_userext + 1, 1835 sizeof(*cert_userext)); 1836 cert_userext[ncert_userext].key = val; 1837 cert_userext[ncert_userext].val = cp == NULL ? 1838 NULL : xstrdup(cp); 1839 cert_userext[ncert_userext].crit = iscrit; 1840 ncert_userext++; 1841 } else 1842 fatal("Unsupported certificate option \"%s\"", opt); 1843 } 1844 1845 static void 1846 show_options(struct sshbuf *optbuf, int in_critical) 1847 { 1848 char *name, *arg; 1849 struct sshbuf *options, *option = NULL; 1850 int r; 1851 1852 if ((options = sshbuf_fromb(optbuf)) == NULL) 1853 fatal("%s: sshbuf_fromb failed", __func__); 1854 while (sshbuf_len(options) != 0) { 1855 sshbuf_free(option); 1856 option = NULL; 1857 if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 || 1858 (r = sshbuf_froms(options, &option)) != 0) 1859 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1860 printf(" %s", name); 1861 if (!in_critical && 1862 (strcmp(name, "permit-X11-forwarding") == 0 || 1863 strcmp(name, "permit-agent-forwarding") == 0 || 1864 strcmp(name, "permit-port-forwarding") == 0 || 1865 strcmp(name, "permit-pty") == 0 || 1866 strcmp(name, "permit-user-rc") == 0)) 1867 printf("\n"); 1868 else if (in_critical && 1869 (strcmp(name, "force-command") == 0 || 1870 strcmp(name, "source-address") == 0)) { 1871 if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0) 1872 fatal("%s: buffer error: %s", 1873 __func__, ssh_err(r)); 1874 printf(" %s\n", arg); 1875 free(arg); 1876 } else { 1877 printf(" UNKNOWN OPTION (len %zu)\n", 1878 sshbuf_len(option)); 1879 sshbuf_reset(option); 1880 } 1881 free(name); 1882 if (sshbuf_len(option) != 0) 1883 fatal("Option corrupt: extra data at end"); 1884 } 1885 sshbuf_free(option); 1886 sshbuf_free(options); 1887 } 1888 1889 static void 1890 print_cert(struct sshkey *key) 1891 { 1892 char valid[64], *key_fp, *ca_fp; 1893 u_int i; 1894 1895 key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT); 1896 ca_fp = sshkey_fingerprint(key->cert->signature_key, 1897 fingerprint_hash, SSH_FP_DEFAULT); 1898 if (key_fp == NULL || ca_fp == NULL) 1899 fatal("%s: sshkey_fingerprint fail", __func__); 1900 sshkey_format_cert_validity(key->cert, valid, sizeof(valid)); 1901 1902 printf(" Type: %s %s certificate\n", sshkey_ssh_name(key), 1903 sshkey_cert_type(key)); 1904 printf(" Public key: %s %s\n", sshkey_type(key), key_fp); 1905 printf(" Signing CA: %s %s\n", 1906 sshkey_type(key->cert->signature_key), ca_fp); 1907 printf(" Key ID: \"%s\"\n", key->cert->key_id); 1908 printf(" Serial: %llu\n", (unsigned long long)key->cert->serial); 1909 printf(" Valid: %s\n", valid); 1910 printf(" Principals: "); 1911 if (key->cert->nprincipals == 0) 1912 printf("(none)\n"); 1913 else { 1914 for (i = 0; i < key->cert->nprincipals; i++) 1915 printf("\n %s", 1916 key->cert->principals[i]); 1917 printf("\n"); 1918 } 1919 printf(" Critical Options: "); 1920 if (sshbuf_len(key->cert->critical) == 0) 1921 printf("(none)\n"); 1922 else { 1923 printf("\n"); 1924 show_options(key->cert->critical, 1); 1925 } 1926 printf(" Extensions: "); 1927 if (sshbuf_len(key->cert->extensions) == 0) 1928 printf("(none)\n"); 1929 else { 1930 printf("\n"); 1931 show_options(key->cert->extensions, 0); 1932 } 1933 } 1934 1935 static void 1936 do_show_cert(struct passwd *pw) 1937 { 1938 struct sshkey *key = NULL; 1939 struct stat st; 1940 int r, is_stdin = 0, ok = 0; 1941 FILE *f; 1942 char *cp, line[SSH_MAX_PUBKEY_BYTES]; 1943 const char *path; 1944 u_long lnum = 0; 1945 1946 if (!have_identity) 1947 ask_filename(pw, "Enter file in which the key is"); 1948 if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) < 0) 1949 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 1950 1951 path = identity_file; 1952 if (strcmp(path, "-") == 0) { 1953 f = stdin; 1954 path = "(stdin)"; 1955 is_stdin = 1; 1956 } else if ((f = fopen(identity_file, "r")) == NULL) 1957 fatal("fopen %s: %s", identity_file, strerror(errno)); 1958 1959 while (read_keyfile_line(f, path, line, sizeof(line), &lnum) == 0) { 1960 sshkey_free(key); 1961 key = NULL; 1962 /* Trim leading space and comments */ 1963 cp = line + strspn(line, " \t"); 1964 if (*cp == '#' || *cp == '\0') 1965 continue; 1966 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 1967 fatal("sshkey_new"); 1968 if ((r = sshkey_read(key, &cp)) != 0) { 1969 error("%s:%lu: invalid key: %s", path, 1970 lnum, ssh_err(r)); 1971 continue; 1972 } 1973 if (!sshkey_is_cert(key)) { 1974 error("%s:%lu is not a certificate", path, lnum); 1975 continue; 1976 } 1977 ok = 1; 1978 if (!is_stdin && lnum == 1) 1979 printf("%s:\n", path); 1980 else 1981 printf("%s:%lu:\n", path, lnum); 1982 print_cert(key); 1983 } 1984 sshkey_free(key); 1985 fclose(f); 1986 exit(ok ? 0 : 1); 1987 } 1988 1989 #ifdef WITH_OPENSSL 1990 static void 1991 load_krl(const char *path, struct ssh_krl **krlp) 1992 { 1993 struct sshbuf *krlbuf; 1994 int r, fd; 1995 1996 if ((krlbuf = sshbuf_new()) == NULL) 1997 fatal("sshbuf_new failed"); 1998 if ((fd = open(path, O_RDONLY)) == -1) 1999 fatal("open %s: %s", path, strerror(errno)); 2000 if ((r = sshkey_load_file(fd, krlbuf)) != 0) 2001 fatal("Unable to load KRL: %s", ssh_err(r)); 2002 close(fd); 2003 /* XXX check sigs */ 2004 if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 || 2005 *krlp == NULL) 2006 fatal("Invalid KRL file: %s", ssh_err(r)); 2007 sshbuf_free(krlbuf); 2008 } 2009 2010 static void 2011 update_krl_from_file(struct passwd *pw, const char *file, int wild_ca, 2012 const struct sshkey *ca, struct ssh_krl *krl) 2013 { 2014 struct sshkey *key = NULL; 2015 u_long lnum = 0; 2016 char *path, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES]; 2017 unsigned long long serial, serial2; 2018 int i, was_explicit_key, was_sha1, r; 2019 FILE *krl_spec; 2020 2021 path = tilde_expand_filename(file, pw->pw_uid); 2022 if (strcmp(path, "-") == 0) { 2023 krl_spec = stdin; 2024 free(path); 2025 path = xstrdup("(standard input)"); 2026 } else if ((krl_spec = fopen(path, "r")) == NULL) 2027 fatal("fopen %s: %s", path, strerror(errno)); 2028 2029 if (!quiet) 2030 printf("Revoking from %s\n", path); 2031 while (read_keyfile_line(krl_spec, path, line, sizeof(line), 2032 &lnum) == 0) { 2033 was_explicit_key = was_sha1 = 0; 2034 cp = line + strspn(line, " \t"); 2035 /* Trim trailing space, comments and strip \n */ 2036 for (i = 0, r = -1; cp[i] != '\0'; i++) { 2037 if (cp[i] == '#' || cp[i] == '\n') { 2038 cp[i] = '\0'; 2039 break; 2040 } 2041 if (cp[i] == ' ' || cp[i] == '\t') { 2042 /* Remember the start of a span of whitespace */ 2043 if (r == -1) 2044 r = i; 2045 } else 2046 r = -1; 2047 } 2048 if (r != -1) 2049 cp[r] = '\0'; 2050 if (*cp == '\0') 2051 continue; 2052 if (strncasecmp(cp, "serial:", 7) == 0) { 2053 if (ca == NULL && !wild_ca) { 2054 fatal("revoking certificates by serial number " 2055 "requires specification of a CA key"); 2056 } 2057 cp += 7; 2058 cp = cp + strspn(cp, " \t"); 2059 errno = 0; 2060 serial = strtoull(cp, &ep, 0); 2061 if (*cp == '\0' || (*ep != '\0' && *ep != '-')) 2062 fatal("%s:%lu: invalid serial \"%s\"", 2063 path, lnum, cp); 2064 if (errno == ERANGE && serial == ULLONG_MAX) 2065 fatal("%s:%lu: serial out of range", 2066 path, lnum); 2067 serial2 = serial; 2068 if (*ep == '-') { 2069 cp = ep + 1; 2070 errno = 0; 2071 serial2 = strtoull(cp, &ep, 0); 2072 if (*cp == '\0' || *ep != '\0') 2073 fatal("%s:%lu: invalid serial \"%s\"", 2074 path, lnum, cp); 2075 if (errno == ERANGE && serial2 == ULLONG_MAX) 2076 fatal("%s:%lu: serial out of range", 2077 path, lnum); 2078 if (serial2 <= serial) 2079 fatal("%s:%lu: invalid serial range " 2080 "%llu:%llu", path, lnum, 2081 (unsigned long long)serial, 2082 (unsigned long long)serial2); 2083 } 2084 if (ssh_krl_revoke_cert_by_serial_range(krl, 2085 ca, serial, serial2) != 0) { 2086 fatal("%s: revoke serial failed", 2087 __func__); 2088 } 2089 } else if (strncasecmp(cp, "id:", 3) == 0) { 2090 if (ca == NULL && !wild_ca) { 2091 fatal("revoking certificates by key ID " 2092 "requires specification of a CA key"); 2093 } 2094 cp += 3; 2095 cp = cp + strspn(cp, " \t"); 2096 if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0) 2097 fatal("%s: revoke key ID failed", __func__); 2098 } else { 2099 if (strncasecmp(cp, "key:", 4) == 0) { 2100 cp += 4; 2101 cp = cp + strspn(cp, " \t"); 2102 was_explicit_key = 1; 2103 } else if (strncasecmp(cp, "sha1:", 5) == 0) { 2104 cp += 5; 2105 cp = cp + strspn(cp, " \t"); 2106 was_sha1 = 1; 2107 } else { 2108 /* 2109 * Just try to process the line as a key. 2110 * Parsing will fail if it isn't. 2111 */ 2112 } 2113 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 2114 fatal("sshkey_new"); 2115 if ((r = sshkey_read(key, &cp)) != 0) 2116 fatal("%s:%lu: invalid key: %s", 2117 path, lnum, ssh_err(r)); 2118 if (was_explicit_key) 2119 r = ssh_krl_revoke_key_explicit(krl, key); 2120 else if (was_sha1) 2121 r = ssh_krl_revoke_key_sha1(krl, key); 2122 else 2123 r = ssh_krl_revoke_key(krl, key); 2124 if (r != 0) 2125 fatal("%s: revoke key failed: %s", 2126 __func__, ssh_err(r)); 2127 sshkey_free(key); 2128 } 2129 } 2130 if (strcmp(path, "-") != 0) 2131 fclose(krl_spec); 2132 free(path); 2133 } 2134 2135 static void 2136 do_gen_krl(struct passwd *pw, int updating, int argc, char **argv) 2137 { 2138 struct ssh_krl *krl; 2139 struct stat sb; 2140 struct sshkey *ca = NULL; 2141 int fd, i, r, wild_ca = 0; 2142 char *tmp; 2143 struct sshbuf *kbuf; 2144 2145 if (*identity_file == '\0') 2146 fatal("KRL generation requires an output file"); 2147 if (stat(identity_file, &sb) == -1) { 2148 if (errno != ENOENT) 2149 fatal("Cannot access KRL \"%s\": %s", 2150 identity_file, strerror(errno)); 2151 if (updating) 2152 fatal("KRL \"%s\" does not exist", identity_file); 2153 } 2154 if (ca_key_path != NULL) { 2155 if (strcasecmp(ca_key_path, "none") == 0) 2156 wild_ca = 1; 2157 else { 2158 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 2159 if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) 2160 fatal("Cannot load CA public key %s: %s", 2161 tmp, ssh_err(r)); 2162 free(tmp); 2163 } 2164 } 2165 2166 if (updating) 2167 load_krl(identity_file, &krl); 2168 else if ((krl = ssh_krl_init()) == NULL) 2169 fatal("couldn't create KRL"); 2170 2171 if (cert_serial != 0) 2172 ssh_krl_set_version(krl, cert_serial); 2173 if (identity_comment != NULL) 2174 ssh_krl_set_comment(krl, identity_comment); 2175 2176 for (i = 0; i < argc; i++) 2177 update_krl_from_file(pw, argv[i], wild_ca, ca, krl); 2178 2179 if ((kbuf = sshbuf_new()) == NULL) 2180 fatal("sshbuf_new failed"); 2181 if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0) 2182 fatal("Couldn't generate KRL"); 2183 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 2184 fatal("open %s: %s", identity_file, strerror(errno)); 2185 if (atomicio(vwrite, fd, (void *)sshbuf_ptr(kbuf), sshbuf_len(kbuf)) != 2186 sshbuf_len(kbuf)) 2187 fatal("write %s: %s", identity_file, strerror(errno)); 2188 close(fd); 2189 sshbuf_free(kbuf); 2190 ssh_krl_free(krl); 2191 sshkey_free(ca); 2192 } 2193 2194 static void 2195 do_check_krl(struct passwd *pw, int argc, char **argv) 2196 { 2197 int i, r, ret = 0; 2198 char *comment; 2199 struct ssh_krl *krl; 2200 struct sshkey *k; 2201 2202 if (*identity_file == '\0') 2203 fatal("KRL checking requires an input file"); 2204 load_krl(identity_file, &krl); 2205 for (i = 0; i < argc; i++) { 2206 if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0) 2207 fatal("Cannot load public key %s: %s", 2208 argv[i], ssh_err(r)); 2209 r = ssh_krl_check_key(krl, k); 2210 printf("%s%s%s%s: %s\n", argv[i], 2211 *comment ? " (" : "", comment, *comment ? ")" : "", 2212 r == 0 ? "ok" : "REVOKED"); 2213 if (r != 0) 2214 ret = 1; 2215 sshkey_free(k); 2216 free(comment); 2217 } 2218 ssh_krl_free(krl); 2219 exit(ret); 2220 } 2221 #endif 2222 2223 static void 2224 usage(void) 2225 { 2226 fprintf(stderr, 2227 "usage: ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa]\n" 2228 " [-N new_passphrase] [-C comment] [-f output_keyfile]\n" 2229 " ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]\n" 2230 " ssh-keygen -i [-m key_format] [-f input_keyfile]\n" 2231 " ssh-keygen -e [-m key_format] [-f input_keyfile]\n" 2232 " ssh-keygen -y [-f input_keyfile]\n" 2233 " ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]\n" 2234 " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n" 2235 " ssh-keygen -B [-f input_keyfile]\n"); 2236 #ifdef ENABLE_PKCS11 2237 fprintf(stderr, 2238 " ssh-keygen -D pkcs11\n"); 2239 #endif 2240 fprintf(stderr, 2241 " ssh-keygen -F hostname [-f known_hosts_file] [-l]\n" 2242 " ssh-keygen -H [-f known_hosts_file]\n" 2243 " ssh-keygen -R hostname [-f known_hosts_file]\n" 2244 " ssh-keygen -r hostname [-f input_keyfile] [-g]\n" 2245 #ifdef WITH_OPENSSL 2246 " ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n" 2247 " ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]\n" 2248 " [-j start_line] [-K checkpt] [-W generator]\n" 2249 #endif 2250 " ssh-keygen -s ca_key -I certificate_identity [-h] [-n principals]\n" 2251 " [-O option] [-V validity_interval] [-z serial_number] file ...\n" 2252 " ssh-keygen -L [-f input_keyfile]\n" 2253 " ssh-keygen -A\n" 2254 " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n" 2255 " file ...\n" 2256 " ssh-keygen -Q -f krl_file file ...\n"); 2257 exit(1); 2258 } 2259 2260 /* 2261 * Main program for key management. 2262 */ 2263 int 2264 main(int argc, char **argv) 2265 { 2266 char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2; 2267 char *rr_hostname = NULL, *ep, *fp, *ra; 2268 struct sshkey *private, *public; 2269 struct passwd *pw; 2270 struct stat st; 2271 int r, opt, type, fd; 2272 int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0; 2273 FILE *f; 2274 const char *errstr; 2275 #ifdef WITH_OPENSSL 2276 /* Moduli generation/screening */ 2277 char out_file[PATH_MAX], *checkpoint = NULL; 2278 u_int32_t memory = 0, generator_wanted = 0; 2279 int do_gen_candidates = 0, do_screen_candidates = 0; 2280 unsigned long start_lineno = 0, lines_to_process = 0; 2281 BIGNUM *start = NULL; 2282 #endif 2283 2284 extern int optind; 2285 extern char *optarg; 2286 2287 ssh_malloc_init(); /* must be called before any mallocs */ 2288 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 2289 sanitise_stdfd(); 2290 2291 OpenSSL_add_all_algorithms(); 2292 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); 2293 2294 setlocale(LC_CTYPE, ""); 2295 2296 /* we need this for the home * directory. */ 2297 pw = getpwuid(getuid()); 2298 if (!pw) 2299 fatal("No user exists for uid %lu", (u_long)getuid()); 2300 if (gethostname(hostname, sizeof(hostname)) < 0) 2301 fatal("gethostname: %s", strerror(errno)); 2302 2303 /* Remaining characters: UYdw */ 2304 while ((opt = getopt(argc, argv, "ABHLQXceghiklopquvxy" 2305 "C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Z:" 2306 "a:b:f:g:j:m:n:r:s:t:z:")) != -1) { 2307 switch (opt) { 2308 case 'A': 2309 gen_all_hostkeys = 1; 2310 break; 2311 case 'b': 2312 bits = (u_int32_t)strtonum(optarg, 256, 32768, &errstr); 2313 if (errstr) 2314 fatal("Bits has bad value %s (%s)", 2315 optarg, errstr); 2316 break; 2317 case 'E': 2318 fingerprint_hash = ssh_digest_alg_by_name(optarg); 2319 if (fingerprint_hash == -1) 2320 fatal("Invalid hash algorithm \"%s\"", optarg); 2321 break; 2322 case 'F': 2323 find_host = 1; 2324 rr_hostname = optarg; 2325 break; 2326 case 'H': 2327 hash_hosts = 1; 2328 break; 2329 case 'I': 2330 cert_key_id = optarg; 2331 break; 2332 case 'R': 2333 delete_host = 1; 2334 rr_hostname = optarg; 2335 break; 2336 case 'L': 2337 show_cert = 1; 2338 break; 2339 case 'l': 2340 print_fingerprint = 1; 2341 break; 2342 case 'B': 2343 print_bubblebabble = 1; 2344 break; 2345 case 'm': 2346 if (strcasecmp(optarg, "RFC4716") == 0 || 2347 strcasecmp(optarg, "ssh2") == 0) { 2348 convert_format = FMT_RFC4716; 2349 break; 2350 } 2351 if (strcasecmp(optarg, "PKCS8") == 0) { 2352 convert_format = FMT_PKCS8; 2353 break; 2354 } 2355 if (strcasecmp(optarg, "PEM") == 0) { 2356 convert_format = FMT_PEM; 2357 break; 2358 } 2359 fatal("Unsupported conversion format \"%s\"", optarg); 2360 case 'n': 2361 cert_principals = optarg; 2362 break; 2363 case 'o': 2364 use_new_format = 1; 2365 break; 2366 case 'p': 2367 change_passphrase = 1; 2368 break; 2369 case 'c': 2370 change_comment = 1; 2371 break; 2372 case 'f': 2373 if (strlcpy(identity_file, optarg, 2374 sizeof(identity_file)) >= sizeof(identity_file)) 2375 fatal("Identity filename too long"); 2376 have_identity = 1; 2377 break; 2378 case 'g': 2379 print_generic = 1; 2380 break; 2381 case 'P': 2382 identity_passphrase = optarg; 2383 break; 2384 case 'N': 2385 identity_new_passphrase = optarg; 2386 break; 2387 case 'Q': 2388 check_krl = 1; 2389 break; 2390 case 'O': 2391 add_cert_option(optarg); 2392 break; 2393 case 'Z': 2394 new_format_cipher = optarg; 2395 break; 2396 case 'C': 2397 identity_comment = optarg; 2398 break; 2399 case 'q': 2400 quiet = 1; 2401 break; 2402 case 'e': 2403 case 'x': 2404 /* export key */ 2405 convert_to = 1; 2406 break; 2407 case 'h': 2408 cert_key_type = SSH2_CERT_TYPE_HOST; 2409 certflags_flags = 0; 2410 break; 2411 case 'k': 2412 gen_krl = 1; 2413 break; 2414 case 'i': 2415 case 'X': 2416 /* import key */ 2417 convert_from = 1; 2418 break; 2419 case 'y': 2420 print_public = 1; 2421 break; 2422 case 's': 2423 ca_key_path = optarg; 2424 break; 2425 case 't': 2426 key_type_name = optarg; 2427 break; 2428 case 'D': 2429 pkcs11provider = optarg; 2430 break; 2431 case 'u': 2432 update_krl = 1; 2433 break; 2434 case 'v': 2435 if (log_level == SYSLOG_LEVEL_INFO) 2436 log_level = SYSLOG_LEVEL_DEBUG1; 2437 else { 2438 if (log_level >= SYSLOG_LEVEL_DEBUG1 && 2439 log_level < SYSLOG_LEVEL_DEBUG3) 2440 log_level++; 2441 } 2442 break; 2443 case 'r': 2444 rr_hostname = optarg; 2445 break; 2446 case 'a': 2447 rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr); 2448 if (errstr) 2449 fatal("Invalid number: %s (%s)", 2450 optarg, errstr); 2451 break; 2452 case 'V': 2453 parse_cert_times(optarg); 2454 break; 2455 case 'z': 2456 errno = 0; 2457 cert_serial = strtoull(optarg, &ep, 10); 2458 if (*optarg < '0' || *optarg > '9' || *ep != '\0' || 2459 (errno == ERANGE && cert_serial == ULLONG_MAX)) 2460 fatal("Invalid serial number \"%s\"", optarg); 2461 break; 2462 #ifdef WITH_OPENSSL 2463 /* Moduli generation/screening */ 2464 case 'G': 2465 do_gen_candidates = 1; 2466 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 2467 sizeof(out_file)) 2468 fatal("Output filename too long"); 2469 break; 2470 case 'J': 2471 lines_to_process = strtoul(optarg, NULL, 10); 2472 break; 2473 case 'j': 2474 start_lineno = strtoul(optarg, NULL, 10); 2475 break; 2476 case 'K': 2477 if (strlen(optarg) >= PATH_MAX) 2478 fatal("Checkpoint filename too long"); 2479 checkpoint = xstrdup(optarg); 2480 break; 2481 case 'M': 2482 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, 2483 &errstr); 2484 if (errstr) 2485 fatal("Memory limit is %s: %s", errstr, optarg); 2486 break; 2487 case 'S': 2488 /* XXX - also compare length against bits */ 2489 if (BN_hex2bn(&start, optarg) == 0) 2490 fatal("Invalid start point."); 2491 break; 2492 case 'T': 2493 do_screen_candidates = 1; 2494 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 2495 sizeof(out_file)) 2496 fatal("Output filename too long"); 2497 break; 2498 case 'W': 2499 generator_wanted = (u_int32_t)strtonum(optarg, 1, 2500 UINT_MAX, &errstr); 2501 if (errstr != NULL) 2502 fatal("Desired generator invalid: %s (%s)", 2503 optarg, errstr); 2504 break; 2505 #endif /* WITH_OPENSSL */ 2506 case '?': 2507 default: 2508 usage(); 2509 } 2510 } 2511 2512 /* reinit */ 2513 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); 2514 2515 argv += optind; 2516 argc -= optind; 2517 2518 if (ca_key_path != NULL) { 2519 if (argc < 1 && !gen_krl) { 2520 error("Too few arguments."); 2521 usage(); 2522 } 2523 } else if (argc > 0 && !gen_krl && !check_krl) { 2524 error("Too many arguments."); 2525 usage(); 2526 } 2527 if (change_passphrase && change_comment) { 2528 error("Can only have one of -p and -c."); 2529 usage(); 2530 } 2531 if (print_fingerprint && (delete_host || hash_hosts)) { 2532 error("Cannot use -l with -H or -R."); 2533 usage(); 2534 } 2535 #ifdef WITH_OPENSSL 2536 if (gen_krl) { 2537 do_gen_krl(pw, update_krl, argc, argv); 2538 return (0); 2539 } 2540 if (check_krl) { 2541 do_check_krl(pw, argc, argv); 2542 return (0); 2543 } 2544 #endif 2545 if (ca_key_path != NULL) { 2546 if (cert_key_id == NULL) 2547 fatal("Must specify key id (-I) when certifying"); 2548 do_ca_sign(pw, argc, argv); 2549 } 2550 if (show_cert) 2551 do_show_cert(pw); 2552 if (delete_host || hash_hosts || find_host) 2553 do_known_hosts(pw, rr_hostname); 2554 if (pkcs11provider != NULL) 2555 do_download(pw); 2556 if (print_fingerprint || print_bubblebabble) 2557 do_fingerprint(pw); 2558 if (change_passphrase) 2559 do_change_passphrase(pw); 2560 if (change_comment) 2561 do_change_comment(pw); 2562 #ifdef WITH_OPENSSL 2563 if (convert_to) 2564 do_convert_to(pw); 2565 if (convert_from) 2566 do_convert_from(pw); 2567 #endif 2568 if (print_public) 2569 do_print_public(pw); 2570 if (rr_hostname != NULL) { 2571 unsigned int n = 0; 2572 2573 if (have_identity) { 2574 n = do_print_resource_record(pw, 2575 identity_file, rr_hostname); 2576 if (n == 0) 2577 fatal("%s: %s", identity_file, strerror(errno)); 2578 exit(0); 2579 } else { 2580 2581 n += do_print_resource_record(pw, 2582 _PATH_HOST_RSA_KEY_FILE, rr_hostname); 2583 n += do_print_resource_record(pw, 2584 _PATH_HOST_DSA_KEY_FILE, rr_hostname); 2585 n += do_print_resource_record(pw, 2586 _PATH_HOST_ECDSA_KEY_FILE, rr_hostname); 2587 n += do_print_resource_record(pw, 2588 _PATH_HOST_ED25519_KEY_FILE, rr_hostname); 2589 if (n == 0) 2590 fatal("no keys found."); 2591 exit(0); 2592 } 2593 } 2594 2595 #ifdef WITH_OPENSSL 2596 if (do_gen_candidates) { 2597 FILE *out = fopen(out_file, "w"); 2598 2599 if (out == NULL) { 2600 error("Couldn't open modulus candidate file \"%s\": %s", 2601 out_file, strerror(errno)); 2602 return (1); 2603 } 2604 if (bits == 0) 2605 bits = DEFAULT_BITS; 2606 if (gen_candidates(out, memory, bits, start) != 0) 2607 fatal("modulus candidate generation failed"); 2608 2609 return (0); 2610 } 2611 2612 if (do_screen_candidates) { 2613 FILE *in; 2614 FILE *out = fopen(out_file, "a"); 2615 2616 if (have_identity && strcmp(identity_file, "-") != 0) { 2617 if ((in = fopen(identity_file, "r")) == NULL) { 2618 fatal("Couldn't open modulus candidate " 2619 "file \"%s\": %s", identity_file, 2620 strerror(errno)); 2621 } 2622 } else 2623 in = stdin; 2624 2625 if (out == NULL) { 2626 fatal("Couldn't open moduli file \"%s\": %s", 2627 out_file, strerror(errno)); 2628 } 2629 if (prime_test(in, out, rounds == 0 ? 100 : rounds, 2630 generator_wanted, checkpoint, 2631 start_lineno, lines_to_process) != 0) 2632 fatal("modulus screening failed"); 2633 return (0); 2634 } 2635 #endif 2636 2637 if (gen_all_hostkeys) { 2638 do_gen_all_hostkeys(pw); 2639 return (0); 2640 } 2641 2642 if (key_type_name == NULL) 2643 key_type_name = DEFAULT_KEY_TYPE_NAME; 2644 2645 type = sshkey_type_from_name(key_type_name); 2646 type_bits_valid(type, key_type_name, &bits); 2647 2648 if (!quiet) 2649 printf("Generating public/private %s key pair.\n", 2650 key_type_name); 2651 if ((r = sshkey_generate(type, bits, &private)) != 0) 2652 fatal("sshkey_generate failed"); 2653 if ((r = sshkey_from_private(private, &public)) != 0) 2654 fatal("sshkey_from_private failed: %s\n", ssh_err(r)); 2655 2656 if (!have_identity) 2657 ask_filename(pw, "Enter file in which to save the key"); 2658 2659 /* Create ~/.ssh directory if it doesn't already exist. */ 2660 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", 2661 pw->pw_dir, _PATH_SSH_USER_DIR); 2662 if (strstr(identity_file, dotsshdir) != NULL) { 2663 if (stat(dotsshdir, &st) < 0) { 2664 if (errno != ENOENT) { 2665 error("Could not stat %s: %s", dotsshdir, 2666 strerror(errno)); 2667 } else if (mkdir(dotsshdir, 0700) < 0) { 2668 error("Could not create directory '%s': %s", 2669 dotsshdir, strerror(errno)); 2670 } else if (!quiet) 2671 printf("Created directory '%s'.\n", dotsshdir); 2672 } 2673 } 2674 /* If the file already exists, ask the user to confirm. */ 2675 if (stat(identity_file, &st) >= 0) { 2676 char yesno[3]; 2677 printf("%s already exists.\n", identity_file); 2678 printf("Overwrite (y/n)? "); 2679 fflush(stdout); 2680 if (fgets(yesno, sizeof(yesno), stdin) == NULL) 2681 exit(1); 2682 if (yesno[0] != 'y' && yesno[0] != 'Y') 2683 exit(1); 2684 } 2685 /* Ask for a passphrase (twice). */ 2686 if (identity_passphrase) 2687 passphrase1 = xstrdup(identity_passphrase); 2688 else if (identity_new_passphrase) 2689 passphrase1 = xstrdup(identity_new_passphrase); 2690 else { 2691 passphrase_again: 2692 passphrase1 = 2693 read_passphrase("Enter passphrase (empty for no " 2694 "passphrase): ", RP_ALLOW_STDIN); 2695 passphrase2 = read_passphrase("Enter same passphrase again: ", 2696 RP_ALLOW_STDIN); 2697 if (strcmp(passphrase1, passphrase2) != 0) { 2698 /* 2699 * The passphrases do not match. Clear them and 2700 * retry. 2701 */ 2702 explicit_bzero(passphrase1, strlen(passphrase1)); 2703 explicit_bzero(passphrase2, strlen(passphrase2)); 2704 free(passphrase1); 2705 free(passphrase2); 2706 printf("Passphrases do not match. Try again.\n"); 2707 goto passphrase_again; 2708 } 2709 /* Clear the other copy of the passphrase. */ 2710 explicit_bzero(passphrase2, strlen(passphrase2)); 2711 free(passphrase2); 2712 } 2713 2714 if (identity_comment) { 2715 strlcpy(comment, identity_comment, sizeof(comment)); 2716 } else { 2717 /* Create default comment field for the passphrase. */ 2718 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); 2719 } 2720 2721 /* Save the key with the given passphrase and comment. */ 2722 if ((r = sshkey_save_private(private, identity_file, passphrase1, 2723 comment, use_new_format, new_format_cipher, rounds)) != 0) { 2724 error("Saving key \"%s\" failed: %s", 2725 identity_file, ssh_err(r)); 2726 explicit_bzero(passphrase1, strlen(passphrase1)); 2727 free(passphrase1); 2728 exit(1); 2729 } 2730 /* Clear the passphrase. */ 2731 explicit_bzero(passphrase1, strlen(passphrase1)); 2732 free(passphrase1); 2733 2734 /* Clear the private key and the random number generator. */ 2735 sshkey_free(private); 2736 2737 if (!quiet) 2738 printf("Your identification has been saved in %s.\n", identity_file); 2739 2740 strlcat(identity_file, ".pub", sizeof(identity_file)); 2741 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 2742 fatal("Unable to save public key to %s: %s", 2743 identity_file, strerror(errno)); 2744 if ((f = fdopen(fd, "w")) == NULL) 2745 fatal("fdopen %s failed: %s", identity_file, strerror(errno)); 2746 if ((r = sshkey_write(public, f)) != 0) 2747 error("write key failed: %s", ssh_err(r)); 2748 fprintf(f, " %s\n", comment); 2749 fclose(f); 2750 2751 if (!quiet) { 2752 fp = sshkey_fingerprint(public, fingerprint_hash, 2753 SSH_FP_DEFAULT); 2754 ra = sshkey_fingerprint(public, fingerprint_hash, 2755 SSH_FP_RANDOMART); 2756 if (fp == NULL || ra == NULL) 2757 fatal("sshkey_fingerprint failed"); 2758 printf("Your public key has been saved in %s.\n", 2759 identity_file); 2760 printf("The key fingerprint is:\n"); 2761 printf("%s %s\n", fp, comment); 2762 printf("The key's randomart image is:\n"); 2763 printf("%s\n", ra); 2764 free(ra); 2765 free(fp); 2766 } 2767 2768 sshkey_free(public); 2769 exit(0); 2770 } 2771