1 /* $OpenBSD: ssh-keygen.c,v 1.277 2015/08/19 23:17:51 djm 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 21 #ifdef WITH_OPENSSL 22 #include <openssl/evp.h> 23 #include <openssl/pem.h> 24 #include "openbsd-compat/openssl-compat.h" 25 #endif 26 27 #include <errno.h> 28 #include <fcntl.h> 29 #include <netdb.h> 30 #ifdef HAVE_PATHS_H 31 # include <paths.h> 32 #endif 33 #include <pwd.h> 34 #include <stdarg.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 #include <limits.h> 40 41 #include "xmalloc.h" 42 #include "sshkey.h" 43 #include "rsa.h" 44 #include "authfile.h" 45 #include "uuencode.h" 46 #include "sshbuf.h" 47 #include "pathnames.h" 48 #include "log.h" 49 #include "misc.h" 50 #include "match.h" 51 #include "hostfile.h" 52 #include "dns.h" 53 #include "ssh.h" 54 #include "ssh2.h" 55 #include "ssherr.h" 56 #include "ssh-pkcs11.h" 57 #include "atomicio.h" 58 #include "krl.h" 59 #include "digest.h" 60 61 #ifdef WITH_OPENSSL 62 # define DEFAULT_KEY_TYPE_NAME "rsa" 63 #else 64 # define DEFAULT_KEY_TYPE_NAME "ed25519" 65 #endif 66 67 /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ 68 #define DEFAULT_BITS 2048 69 #define DEFAULT_BITS_DSA 1024 70 #define DEFAULT_BITS_ECDSA 256 71 u_int32_t bits = 0; 72 73 /* 74 * Flag indicating that we just want to change the passphrase. This can be 75 * set on the command line. 76 */ 77 int change_passphrase = 0; 78 79 /* 80 * Flag indicating that we just want to change the comment. This can be set 81 * on the command line. 82 */ 83 int change_comment = 0; 84 85 int quiet = 0; 86 87 int log_level = SYSLOG_LEVEL_INFO; 88 89 /* Flag indicating that we want to hash a known_hosts file */ 90 int hash_hosts = 0; 91 /* Flag indicating that we want lookup a host in known_hosts file */ 92 int find_host = 0; 93 /* Flag indicating that we want to delete a host from a known_hosts file */ 94 int delete_host = 0; 95 96 /* Flag indicating that we want to show the contents of a certificate */ 97 int show_cert = 0; 98 99 /* Flag indicating that we just want to see the key fingerprint */ 100 int print_fingerprint = 0; 101 int print_bubblebabble = 0; 102 103 /* Hash algorithm to use for fingerprints. */ 104 int fingerprint_hash = SSH_FP_HASH_DEFAULT; 105 106 /* The identity file name, given on the command line or entered by the user. */ 107 char identity_file[1024]; 108 int have_identity = 0; 109 110 /* This is set to the passphrase if given on the command line. */ 111 char *identity_passphrase = NULL; 112 113 /* This is set to the new passphrase if given on the command line. */ 114 char *identity_new_passphrase = NULL; 115 116 /* This is set to the new comment if given on the command line. */ 117 char *identity_comment = NULL; 118 119 /* Path to CA key when certifying keys. */ 120 char *ca_key_path = NULL; 121 122 /* Certificate serial number */ 123 unsigned long long cert_serial = 0; 124 125 /* Key type when certifying */ 126 u_int cert_key_type = SSH2_CERT_TYPE_USER; 127 128 /* "key ID" of signed key */ 129 char *cert_key_id = NULL; 130 131 /* Comma-separated list of principal names for certifying keys */ 132 char *cert_principals = NULL; 133 134 /* Validity period for certificates */ 135 u_int64_t cert_valid_from = 0; 136 u_int64_t cert_valid_to = ~0ULL; 137 138 /* Certificate options */ 139 #define CERTOPT_X_FWD (1) 140 #define CERTOPT_AGENT_FWD (1<<1) 141 #define CERTOPT_PORT_FWD (1<<2) 142 #define CERTOPT_PTY (1<<3) 143 #define CERTOPT_USER_RC (1<<4) 144 #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \ 145 CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC) 146 u_int32_t certflags_flags = CERTOPT_DEFAULT; 147 char *certflags_command = NULL; 148 char *certflags_src_addr = NULL; 149 150 /* Conversion to/from various formats */ 151 int convert_to = 0; 152 int convert_from = 0; 153 enum { 154 FMT_RFC4716, 155 FMT_PKCS8, 156 FMT_PEM 157 } convert_format = FMT_RFC4716; 158 int print_public = 0; 159 int print_generic = 0; 160 161 char *key_type_name = NULL; 162 163 /* Load key from this PKCS#11 provider */ 164 char *pkcs11provider = NULL; 165 166 /* Use new OpenSSH private key format when writing SSH2 keys instead of PEM */ 167 int use_new_format = 0; 168 169 /* Cipher for new-format private keys */ 170 char *new_format_cipher = NULL; 171 172 /* 173 * Number of KDF rounds to derive new format keys / 174 * number of primality trials when screening moduli. 175 */ 176 int rounds = 0; 177 178 /* argv0 */ 179 extern char *__progname; 180 181 char hostname[NI_MAXHOST]; 182 183 #ifdef WITH_OPENSSL 184 /* moduli.c */ 185 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); 186 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long, 187 unsigned long); 188 #endif 189 190 static void 191 type_bits_valid(int type, const char *name, u_int32_t *bitsp) 192 { 193 #ifdef WITH_OPENSSL 194 u_int maxbits, nid; 195 #endif 196 197 if (type == KEY_UNSPEC) 198 fatal("unknown key type %s", key_type_name); 199 if (*bitsp == 0) { 200 #ifdef WITH_OPENSSL 201 if (type == KEY_DSA) 202 *bitsp = DEFAULT_BITS_DSA; 203 else if (type == KEY_ECDSA) { 204 if (name != NULL && 205 (nid = sshkey_ecdsa_nid_from_name(name)) > 0) 206 *bitsp = sshkey_curve_nid_to_bits(nid); 207 if (*bitsp == 0) 208 *bitsp = DEFAULT_BITS_ECDSA; 209 } else 210 #endif 211 *bitsp = DEFAULT_BITS; 212 } 213 #ifdef WITH_OPENSSL 214 maxbits = (type == KEY_DSA) ? 215 OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS; 216 if (*bitsp > maxbits) 217 fatal("key bits exceeds maximum %d", maxbits); 218 if (type == KEY_DSA && *bitsp != 1024) 219 fatal("DSA keys must be 1024 bits"); 220 else if (type != KEY_ECDSA && type != KEY_ED25519 && *bitsp < 1024) 221 fatal("Key must at least be 1024 bits"); 222 else if (type == KEY_ECDSA && sshkey_ecdsa_bits_to_nid(*bitsp) == -1) 223 fatal("Invalid ECDSA key length - valid lengths are " 224 "256, 384 or 521 bits"); 225 #endif 226 } 227 228 static void 229 ask_filename(struct passwd *pw, const char *prompt) 230 { 231 char buf[1024]; 232 char *name = NULL; 233 234 if (key_type_name == NULL) 235 name = _PATH_SSH_CLIENT_ID_RSA; 236 else { 237 switch (sshkey_type_from_name(key_type_name)) { 238 case KEY_RSA1: 239 name = _PATH_SSH_CLIENT_IDENTITY; 240 break; 241 case KEY_DSA_CERT: 242 case KEY_DSA: 243 name = _PATH_SSH_CLIENT_ID_DSA; 244 break; 245 #ifdef OPENSSL_HAS_ECC 246 case KEY_ECDSA_CERT: 247 case KEY_ECDSA: 248 name = _PATH_SSH_CLIENT_ID_ECDSA; 249 break; 250 #endif 251 case KEY_RSA_CERT: 252 case KEY_RSA: 253 name = _PATH_SSH_CLIENT_ID_RSA; 254 break; 255 case KEY_ED25519: 256 case KEY_ED25519_CERT: 257 name = _PATH_SSH_CLIENT_ID_ED25519; 258 break; 259 default: 260 fatal("bad key type"); 261 } 262 } 263 snprintf(identity_file, sizeof(identity_file), 264 "%s/%s", pw->pw_dir, name); 265 printf("%s (%s): ", prompt, identity_file); 266 fflush(stdout); 267 if (fgets(buf, sizeof(buf), stdin) == NULL) 268 exit(1); 269 buf[strcspn(buf, "\n")] = '\0'; 270 if (strcmp(buf, "") != 0) 271 strlcpy(identity_file, buf, sizeof(identity_file)); 272 have_identity = 1; 273 } 274 275 static struct sshkey * 276 load_identity(char *filename) 277 { 278 char *pass; 279 struct sshkey *prv; 280 int r; 281 282 if ((r = sshkey_load_private(filename, "", &prv, NULL)) == 0) 283 return prv; 284 if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 285 fatal("Load key \"%s\": %s", filename, ssh_err(r)); 286 if (identity_passphrase) 287 pass = xstrdup(identity_passphrase); 288 else 289 pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN); 290 r = sshkey_load_private(filename, pass, &prv, NULL); 291 explicit_bzero(pass, strlen(pass)); 292 free(pass); 293 if (r != 0) 294 fatal("Load key \"%s\": %s", filename, ssh_err(r)); 295 return prv; 296 } 297 298 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" 299 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" 300 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" 301 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb 302 303 #ifdef WITH_OPENSSL 304 static void 305 do_convert_to_ssh2(struct passwd *pw, struct sshkey *k) 306 { 307 size_t len; 308 u_char *blob; 309 char comment[61]; 310 int r; 311 312 if (k->type == KEY_RSA1) 313 fatal("version 1 keys are not supported"); 314 if ((r = sshkey_to_blob(k, &blob, &len)) != 0) 315 fatal("key_to_blob failed: %s", ssh_err(r)); 316 /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */ 317 snprintf(comment, sizeof(comment), 318 "%u-bit %s, converted by %s@%s from OpenSSH", 319 sshkey_size(k), sshkey_type(k), 320 pw->pw_name, hostname); 321 322 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); 323 fprintf(stdout, "Comment: \"%s\"\n", comment); 324 dump_base64(stdout, blob, len); 325 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); 326 sshkey_free(k); 327 free(blob); 328 exit(0); 329 } 330 331 static void 332 do_convert_to_pkcs8(struct sshkey *k) 333 { 334 switch (sshkey_type_plain(k->type)) { 335 case KEY_RSA1: 336 case KEY_RSA: 337 if (!PEM_write_RSA_PUBKEY(stdout, k->rsa)) 338 fatal("PEM_write_RSA_PUBKEY failed"); 339 break; 340 case KEY_DSA: 341 if (!PEM_write_DSA_PUBKEY(stdout, k->dsa)) 342 fatal("PEM_write_DSA_PUBKEY failed"); 343 break; 344 #ifdef OPENSSL_HAS_ECC 345 case KEY_ECDSA: 346 if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa)) 347 fatal("PEM_write_EC_PUBKEY failed"); 348 break; 349 #endif 350 default: 351 fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); 352 } 353 exit(0); 354 } 355 356 static void 357 do_convert_to_pem(struct sshkey *k) 358 { 359 switch (sshkey_type_plain(k->type)) { 360 case KEY_RSA1: 361 case KEY_RSA: 362 if (!PEM_write_RSAPublicKey(stdout, k->rsa)) 363 fatal("PEM_write_RSAPublicKey failed"); 364 break; 365 #if notyet /* OpenSSH 0.9.8 lacks this function */ 366 case KEY_DSA: 367 if (!PEM_write_DSAPublicKey(stdout, k->dsa)) 368 fatal("PEM_write_DSAPublicKey failed"); 369 break; 370 #endif 371 /* XXX ECDSA? */ 372 default: 373 fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); 374 } 375 exit(0); 376 } 377 378 static void 379 do_convert_to(struct passwd *pw) 380 { 381 struct sshkey *k; 382 struct stat st; 383 int r; 384 385 if (!have_identity) 386 ask_filename(pw, "Enter file in which the key is"); 387 if (stat(identity_file, &st) < 0) 388 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 389 if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0) 390 k = load_identity(identity_file); 391 switch (convert_format) { 392 case FMT_RFC4716: 393 do_convert_to_ssh2(pw, k); 394 break; 395 case FMT_PKCS8: 396 do_convert_to_pkcs8(k); 397 break; 398 case FMT_PEM: 399 do_convert_to_pem(k); 400 break; 401 default: 402 fatal("%s: unknown key format %d", __func__, convert_format); 403 } 404 exit(0); 405 } 406 407 /* 408 * This is almost exactly the bignum1 encoding, but with 32 bit for length 409 * instead of 16. 410 */ 411 static void 412 buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value) 413 { 414 u_int bytes, bignum_bits; 415 int r; 416 417 if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0) 418 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 419 bytes = (bignum_bits + 7) / 8; 420 if (sshbuf_len(b) < bytes) 421 fatal("%s: input buffer too small: need %d have %zu", 422 __func__, bytes, sshbuf_len(b)); 423 if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL) 424 fatal("%s: BN_bin2bn failed", __func__); 425 if ((r = sshbuf_consume(b, bytes)) != 0) 426 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 427 } 428 429 static struct sshkey * 430 do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) 431 { 432 struct sshbuf *b; 433 struct sshkey *key = NULL; 434 char *type, *cipher; 435 u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345"; 436 int r, rlen, ktype; 437 u_int magic, i1, i2, i3, i4; 438 size_t slen; 439 u_long e; 440 441 if ((b = sshbuf_from(blob, blen)) == NULL) 442 fatal("%s: sshbuf_from failed", __func__); 443 if ((r = sshbuf_get_u32(b, &magic)) != 0) 444 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 445 446 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { 447 error("bad magic 0x%x != 0x%x", magic, 448 SSH_COM_PRIVATE_KEY_MAGIC); 449 sshbuf_free(b); 450 return NULL; 451 } 452 if ((r = sshbuf_get_u32(b, &i1)) != 0 || 453 (r = sshbuf_get_cstring(b, &type, NULL)) != 0 || 454 (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 || 455 (r = sshbuf_get_u32(b, &i2)) != 0 || 456 (r = sshbuf_get_u32(b, &i3)) != 0 || 457 (r = sshbuf_get_u32(b, &i4)) != 0) 458 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 459 debug("ignore (%d %d %d %d)", i1, i2, i3, i4); 460 if (strcmp(cipher, "none") != 0) { 461 error("unsupported cipher %s", cipher); 462 free(cipher); 463 sshbuf_free(b); 464 free(type); 465 return NULL; 466 } 467 free(cipher); 468 469 if (strstr(type, "dsa")) { 470 ktype = KEY_DSA; 471 } else if (strstr(type, "rsa")) { 472 ktype = KEY_RSA; 473 } else { 474 sshbuf_free(b); 475 free(type); 476 return NULL; 477 } 478 if ((key = sshkey_new_private(ktype)) == NULL) 479 fatal("key_new_private failed"); 480 free(type); 481 482 switch (key->type) { 483 case KEY_DSA: 484 buffer_get_bignum_bits(b, key->dsa->p); 485 buffer_get_bignum_bits(b, key->dsa->g); 486 buffer_get_bignum_bits(b, key->dsa->q); 487 buffer_get_bignum_bits(b, key->dsa->pub_key); 488 buffer_get_bignum_bits(b, key->dsa->priv_key); 489 break; 490 case KEY_RSA: 491 if ((r = sshbuf_get_u8(b, &e1)) != 0 || 492 (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) || 493 (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0)) 494 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 495 e = e1; 496 debug("e %lx", e); 497 if (e < 30) { 498 e <<= 8; 499 e += e2; 500 debug("e %lx", e); 501 e <<= 8; 502 e += e3; 503 debug("e %lx", e); 504 } 505 if (!BN_set_word(key->rsa->e, e)) { 506 sshbuf_free(b); 507 sshkey_free(key); 508 return NULL; 509 } 510 buffer_get_bignum_bits(b, key->rsa->d); 511 buffer_get_bignum_bits(b, key->rsa->n); 512 buffer_get_bignum_bits(b, key->rsa->iqmp); 513 buffer_get_bignum_bits(b, key->rsa->q); 514 buffer_get_bignum_bits(b, key->rsa->p); 515 if ((r = rsa_generate_additional_parameters(key->rsa)) != 0) 516 fatal("generate RSA parameters failed: %s", ssh_err(r)); 517 break; 518 } 519 rlen = sshbuf_len(b); 520 if (rlen != 0) 521 error("do_convert_private_ssh2_from_blob: " 522 "remaining bytes in key blob %d", rlen); 523 sshbuf_free(b); 524 525 /* try the key */ 526 if (sshkey_sign(key, &sig, &slen, data, sizeof(data), 0) != 0 || 527 sshkey_verify(key, sig, slen, data, sizeof(data), 0) != 0) { 528 sshkey_free(key); 529 free(sig); 530 return NULL; 531 } 532 free(sig); 533 return key; 534 } 535 536 static int 537 get_line(FILE *fp, char *line, size_t len) 538 { 539 int c; 540 size_t pos = 0; 541 542 line[0] = '\0'; 543 while ((c = fgetc(fp)) != EOF) { 544 if (pos >= len - 1) 545 fatal("input line too long."); 546 switch (c) { 547 case '\r': 548 c = fgetc(fp); 549 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) 550 fatal("unget: %s", strerror(errno)); 551 return pos; 552 case '\n': 553 return pos; 554 } 555 line[pos++] = c; 556 line[pos] = '\0'; 557 } 558 /* We reached EOF */ 559 return -1; 560 } 561 562 static void 563 do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private) 564 { 565 int r, blen, escaped = 0; 566 u_int len; 567 char line[1024]; 568 u_char blob[8096]; 569 char encoded[8096]; 570 FILE *fp; 571 572 if ((fp = fopen(identity_file, "r")) == NULL) 573 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 574 encoded[0] = '\0'; 575 while ((blen = get_line(fp, line, sizeof(line))) != -1) { 576 if (blen > 0 && line[blen - 1] == '\\') 577 escaped++; 578 if (strncmp(line, "----", 4) == 0 || 579 strstr(line, ": ") != NULL) { 580 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) 581 *private = 1; 582 if (strstr(line, " END ") != NULL) { 583 break; 584 } 585 /* fprintf(stderr, "ignore: %s", line); */ 586 continue; 587 } 588 if (escaped) { 589 escaped--; 590 /* fprintf(stderr, "escaped: %s", line); */ 591 continue; 592 } 593 strlcat(encoded, line, sizeof(encoded)); 594 } 595 len = strlen(encoded); 596 if (((len % 4) == 3) && 597 (encoded[len-1] == '=') && 598 (encoded[len-2] == '=') && 599 (encoded[len-3] == '=')) 600 encoded[len-3] = '\0'; 601 blen = uudecode(encoded, blob, sizeof(blob)); 602 if (blen < 0) 603 fatal("uudecode failed."); 604 if (*private) 605 *k = do_convert_private_ssh2_from_blob(blob, blen); 606 else if ((r = sshkey_from_blob(blob, blen, k)) != 0) 607 fatal("decode blob failed: %s", ssh_err(r)); 608 fclose(fp); 609 } 610 611 static void 612 do_convert_from_pkcs8(struct sshkey **k, int *private) 613 { 614 EVP_PKEY *pubkey; 615 FILE *fp; 616 617 if ((fp = fopen(identity_file, "r")) == NULL) 618 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 619 if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) { 620 fatal("%s: %s is not a recognised public key format", __func__, 621 identity_file); 622 } 623 fclose(fp); 624 switch (EVP_PKEY_type(pubkey->type)) { 625 case EVP_PKEY_RSA: 626 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 627 fatal("sshkey_new failed"); 628 (*k)->type = KEY_RSA; 629 (*k)->rsa = EVP_PKEY_get1_RSA(pubkey); 630 break; 631 case EVP_PKEY_DSA: 632 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 633 fatal("sshkey_new failed"); 634 (*k)->type = KEY_DSA; 635 (*k)->dsa = EVP_PKEY_get1_DSA(pubkey); 636 break; 637 #ifdef OPENSSL_HAS_ECC 638 case EVP_PKEY_EC: 639 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 640 fatal("sshkey_new failed"); 641 (*k)->type = KEY_ECDSA; 642 (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey); 643 (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa); 644 break; 645 #endif 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 #ifdef OPENSSL_HAS_ECC 726 case KEY_ECDSA: 727 ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL, 728 NULL, 0, NULL, NULL); 729 break; 730 #endif 731 case KEY_RSA: 732 ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, 733 NULL, 0, NULL, NULL); 734 break; 735 default: 736 fatal("%s: unsupported key type %s", __func__, 737 sshkey_type(k)); 738 } 739 } 740 741 if (!ok) 742 fatal("key write failed"); 743 sshkey_free(k); 744 exit(0); 745 } 746 #endif 747 748 static void 749 do_print_public(struct passwd *pw) 750 { 751 struct sshkey *prv; 752 struct stat st; 753 int r; 754 755 if (!have_identity) 756 ask_filename(pw, "Enter file in which the key is"); 757 if (stat(identity_file, &st) < 0) 758 fatal("%s: %s", identity_file, strerror(errno)); 759 prv = load_identity(identity_file); 760 if ((r = sshkey_write(prv, stdout)) != 0) 761 error("key_write failed: %s", ssh_err(r)); 762 sshkey_free(prv); 763 fprintf(stdout, "\n"); 764 exit(0); 765 } 766 767 static void 768 do_download(struct passwd *pw) 769 { 770 #ifdef ENABLE_PKCS11 771 struct sshkey **keys = NULL; 772 int i, nkeys; 773 enum sshkey_fp_rep rep; 774 int fptype; 775 char *fp, *ra; 776 777 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 778 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 779 780 pkcs11_init(0); 781 nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys); 782 if (nkeys <= 0) 783 fatal("cannot read public key from pkcs11"); 784 for (i = 0; i < nkeys; i++) { 785 if (print_fingerprint) { 786 fp = sshkey_fingerprint(keys[i], fptype, rep); 787 ra = sshkey_fingerprint(keys[i], fingerprint_hash, 788 SSH_FP_RANDOMART); 789 if (fp == NULL || ra == NULL) 790 fatal("%s: sshkey_fingerprint fail", __func__); 791 printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]), 792 fp, sshkey_type(keys[i])); 793 if (log_level >= SYSLOG_LEVEL_VERBOSE) 794 printf("%s\n", ra); 795 free(ra); 796 free(fp); 797 } else { 798 (void) sshkey_write(keys[i], stdout); /* XXX check */ 799 fprintf(stdout, "\n"); 800 } 801 sshkey_free(keys[i]); 802 } 803 free(keys); 804 pkcs11_terminate(); 805 exit(0); 806 #else 807 fatal("no pkcs11 support"); 808 #endif /* ENABLE_PKCS11 */ 809 } 810 811 static void 812 do_fingerprint(struct passwd *pw) 813 { 814 FILE *f; 815 struct sshkey *public; 816 char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra; 817 int r, i, skip = 0, num = 0, invalid = 1; 818 enum sshkey_fp_rep rep; 819 int fptype; 820 struct stat st; 821 822 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 823 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 824 if (!have_identity) 825 ask_filename(pw, "Enter file in which the key is"); 826 if (stat(identity_file, &st) < 0) 827 fatal("%s: %s", identity_file, strerror(errno)); 828 if ((r = sshkey_load_public(identity_file, &public, &comment)) != 0) 829 debug2("Error loading public key \"%s\": %s", 830 identity_file, ssh_err(r)); 831 else { 832 fp = sshkey_fingerprint(public, fptype, rep); 833 ra = sshkey_fingerprint(public, fingerprint_hash, 834 SSH_FP_RANDOMART); 835 if (fp == NULL || ra == NULL) 836 fatal("%s: sshkey_fingerprint fail", __func__); 837 printf("%u %s %s (%s)\n", sshkey_size(public), fp, comment, 838 sshkey_type(public)); 839 if (log_level >= SYSLOG_LEVEL_VERBOSE) 840 printf("%s\n", ra); 841 sshkey_free(public); 842 free(comment); 843 free(ra); 844 free(fp); 845 exit(0); 846 } 847 if (comment) { 848 free(comment); 849 comment = NULL; 850 } 851 852 if ((f = fopen(identity_file, "r")) == NULL) 853 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 854 855 while (fgets(line, sizeof(line), f)) { 856 if ((cp = strchr(line, '\n')) == NULL) { 857 error("line %d too long: %.40s...", 858 num + 1, line); 859 skip = 1; 860 continue; 861 } 862 num++; 863 if (skip) { 864 skip = 0; 865 continue; 866 } 867 *cp = '\0'; 868 869 /* Skip leading whitespace, empty and comment lines. */ 870 for (cp = line; *cp == ' ' || *cp == '\t'; cp++) 871 ; 872 if (!*cp || *cp == '\n' || *cp == '#') 873 continue; 874 i = strtol(cp, &ep, 10); 875 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { 876 int quoted = 0; 877 comment = cp; 878 for (; *cp && (quoted || (*cp != ' ' && 879 *cp != '\t')); cp++) { 880 if (*cp == '\\' && cp[1] == '"') 881 cp++; /* Skip both */ 882 else if (*cp == '"') 883 quoted = !quoted; 884 } 885 if (!*cp) 886 continue; 887 *cp++ = '\0'; 888 } 889 ep = cp; 890 if ((public = sshkey_new(KEY_RSA1)) == NULL) 891 fatal("sshkey_new failed"); 892 if ((r = sshkey_read(public, &cp)) != 0) { 893 cp = ep; 894 sshkey_free(public); 895 if ((public = sshkey_new(KEY_UNSPEC)) == NULL) 896 fatal("sshkey_new failed"); 897 if ((r = sshkey_read(public, &cp)) != 0) { 898 sshkey_free(public); 899 continue; 900 } 901 } 902 comment = *cp ? cp : comment; 903 fp = sshkey_fingerprint(public, fptype, rep); 904 ra = sshkey_fingerprint(public, fingerprint_hash, 905 SSH_FP_RANDOMART); 906 if (fp == NULL || ra == NULL) 907 fatal("%s: sshkey_fingerprint fail", __func__); 908 printf("%u %s %s (%s)\n", sshkey_size(public), fp, 909 comment ? comment : "no comment", sshkey_type(public)); 910 if (log_level >= SYSLOG_LEVEL_VERBOSE) 911 printf("%s\n", ra); 912 free(ra); 913 free(fp); 914 sshkey_free(public); 915 invalid = 0; 916 } 917 fclose(f); 918 919 if (invalid) 920 fatal("%s is not a public key file.", identity_file); 921 exit(0); 922 } 923 924 static void 925 do_gen_all_hostkeys(struct passwd *pw) 926 { 927 struct { 928 char *key_type; 929 char *key_type_display; 930 char *path; 931 } key_types[] = { 932 #ifdef WITH_OPENSSL 933 #ifdef WITH_SSH1 934 { "rsa1", "RSA1", _PATH_HOST_KEY_FILE }, 935 #endif /* WITH_SSH1 */ 936 { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE }, 937 { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE }, 938 #ifdef OPENSSL_HAS_ECC 939 { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE }, 940 #endif /* OPENSSL_HAS_ECC */ 941 #endif /* WITH_OPENSSL */ 942 { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE }, 943 { NULL, NULL, NULL } 944 }; 945 946 int first = 0; 947 struct stat st; 948 struct sshkey *private, *public; 949 char comment[1024]; 950 int i, type, fd, r; 951 FILE *f; 952 953 for (i = 0; key_types[i].key_type; i++) { 954 if (stat(key_types[i].path, &st) == 0) 955 continue; 956 if (errno != ENOENT) { 957 error("Could not stat %s: %s", key_types[i].path, 958 strerror(errno)); 959 first = 0; 960 continue; 961 } 962 963 if (first == 0) { 964 first = 1; 965 printf("%s: generating new host keys: ", __progname); 966 } 967 printf("%s ", key_types[i].key_type_display); 968 fflush(stdout); 969 type = sshkey_type_from_name(key_types[i].key_type); 970 strlcpy(identity_file, key_types[i].path, sizeof(identity_file)); 971 bits = 0; 972 type_bits_valid(type, NULL, &bits); 973 if ((r = sshkey_generate(type, bits, &private)) != 0) { 974 error("key_generate failed: %s", ssh_err(r)); 975 first = 0; 976 continue; 977 } 978 if ((r = sshkey_from_private(private, &public)) != 0) 979 fatal("sshkey_from_private failed: %s", ssh_err(r)); 980 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, 981 hostname); 982 if ((r = sshkey_save_private(private, identity_file, "", 983 comment, use_new_format, new_format_cipher, rounds)) != 0) { 984 error("Saving key \"%s\" failed: %s", 985 identity_file, ssh_err(r)); 986 sshkey_free(private); 987 sshkey_free(public); 988 first = 0; 989 continue; 990 } 991 sshkey_free(private); 992 strlcat(identity_file, ".pub", sizeof(identity_file)); 993 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 994 if (fd == -1) { 995 error("Could not save your public key in %s", 996 identity_file); 997 sshkey_free(public); 998 first = 0; 999 continue; 1000 } 1001 f = fdopen(fd, "w"); 1002 if (f == NULL) { 1003 error("fdopen %s failed", identity_file); 1004 close(fd); 1005 sshkey_free(public); 1006 first = 0; 1007 continue; 1008 } 1009 if ((r = sshkey_write(public, f)) != 0) { 1010 error("write key failed: %s", ssh_err(r)); 1011 fclose(f); 1012 sshkey_free(public); 1013 first = 0; 1014 continue; 1015 } 1016 fprintf(f, " %s\n", comment); 1017 fclose(f); 1018 sshkey_free(public); 1019 1020 } 1021 if (first != 0) 1022 printf("\n"); 1023 } 1024 1025 struct known_hosts_ctx { 1026 const char *host; /* Hostname searched for in find/delete case */ 1027 FILE *out; /* Output file, stdout for find_hosts case */ 1028 int has_unhashed; /* When hashing, original had unhashed hosts */ 1029 int found_key; /* For find/delete, host was found */ 1030 int invalid; /* File contained invalid items; don't delete */ 1031 }; 1032 1033 static int 1034 known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx) 1035 { 1036 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1037 char *hashed, *cp, *hosts, *ohosts; 1038 int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts); 1039 1040 switch (l->status) { 1041 case HKF_STATUS_OK: 1042 case HKF_STATUS_MATCHED: 1043 /* 1044 * Don't hash hosts already already hashed, with wildcard 1045 * characters or a CA/revocation marker. 1046 */ 1047 if ((l->match & HKF_MATCH_HOST_HASHED) != 0 || 1048 has_wild || l->marker != MRK_NONE) { 1049 fprintf(ctx->out, "%s\n", l->line); 1050 if (has_wild && !find_host) { 1051 logit("%s:%ld: ignoring host name " 1052 "with wildcard: %.64s", l->path, 1053 l->linenum, l->hosts); 1054 } 1055 return 0; 1056 } 1057 /* 1058 * Split any comma-separated hostnames from the host list, 1059 * hash and store separately. 1060 */ 1061 ohosts = hosts = xstrdup(l->hosts); 1062 while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') { 1063 if ((hashed = host_hash(cp, NULL, 0)) == NULL) 1064 fatal("hash_host failed"); 1065 fprintf(ctx->out, "%s %s\n", hashed, l->rawkey); 1066 ctx->has_unhashed = 1; 1067 } 1068 free(ohosts); 1069 return 0; 1070 case HKF_STATUS_INVALID: 1071 /* Retain invalid lines, but mark file as invalid. */ 1072 ctx->invalid = 1; 1073 logit("%s:%ld: invalid line", l->path, l->linenum); 1074 /* FALLTHROUGH */ 1075 default: 1076 fprintf(ctx->out, "%s\n", l->line); 1077 return 0; 1078 } 1079 /* NOTREACHED */ 1080 return -1; 1081 } 1082 1083 static int 1084 known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx) 1085 { 1086 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1087 enum sshkey_fp_rep rep; 1088 int fptype; 1089 char *fp; 1090 1091 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 1092 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 1093 1094 if (l->status == HKF_STATUS_MATCHED) { 1095 if (delete_host) { 1096 if (l->marker != MRK_NONE) { 1097 /* Don't remove CA and revocation lines */ 1098 fprintf(ctx->out, "%s\n", l->line); 1099 } else { 1100 /* 1101 * Hostname matches and has no CA/revoke 1102 * marker, delete it by *not* writing the 1103 * line to ctx->out. 1104 */ 1105 ctx->found_key = 1; 1106 if (!quiet) 1107 printf("# Host %s found: line %ld\n", 1108 ctx->host, l->linenum); 1109 } 1110 return 0; 1111 } else if (find_host) { 1112 ctx->found_key = 1; 1113 if (!quiet) { 1114 printf("# Host %s found: line %ld %s\n", 1115 ctx->host, 1116 l->linenum, l->marker == MRK_CA ? "CA" : 1117 (l->marker == MRK_REVOKE ? "REVOKED" : "")); 1118 } 1119 if (hash_hosts) 1120 known_hosts_hash(l, ctx); 1121 else if (print_fingerprint) { 1122 fp = sshkey_fingerprint(l->key, fptype, rep); 1123 printf("%s %s %s %s\n", ctx->host, 1124 sshkey_type(l->key), fp, l->comment); 1125 free(fp); 1126 } else 1127 fprintf(ctx->out, "%s\n", l->line); 1128 return 0; 1129 } 1130 } else if (delete_host) { 1131 /* Retain non-matching hosts when deleting */ 1132 if (l->status == HKF_STATUS_INVALID) { 1133 ctx->invalid = 1; 1134 logit("%s:%ld: invalid line", l->path, l->linenum); 1135 } 1136 fprintf(ctx->out, "%s\n", l->line); 1137 } 1138 return 0; 1139 } 1140 1141 static void 1142 do_known_hosts(struct passwd *pw, const char *name) 1143 { 1144 char *cp, tmp[PATH_MAX], old[PATH_MAX]; 1145 int r, fd, oerrno, inplace = 0; 1146 struct known_hosts_ctx ctx; 1147 u_int foreach_options; 1148 1149 if (!have_identity) { 1150 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); 1151 if (strlcpy(identity_file, cp, sizeof(identity_file)) >= 1152 sizeof(identity_file)) 1153 fatal("Specified known hosts path too long"); 1154 free(cp); 1155 have_identity = 1; 1156 } 1157 1158 memset(&ctx, 0, sizeof(ctx)); 1159 ctx.out = stdout; 1160 ctx.host = name; 1161 1162 /* 1163 * Find hosts goes to stdout, hash and deletions happen in-place 1164 * A corner case is ssh-keygen -HF foo, which should go to stdout 1165 */ 1166 if (!find_host && (hash_hosts || delete_host)) { 1167 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || 1168 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || 1169 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || 1170 strlcat(old, ".old", sizeof(old)) >= sizeof(old)) 1171 fatal("known_hosts path too long"); 1172 umask(077); 1173 if ((fd = mkstemp(tmp)) == -1) 1174 fatal("mkstemp: %s", strerror(errno)); 1175 if ((ctx.out = fdopen(fd, "w")) == NULL) { 1176 oerrno = errno; 1177 unlink(tmp); 1178 fatal("fdopen: %s", strerror(oerrno)); 1179 } 1180 inplace = 1; 1181 } 1182 1183 /* XXX support identity_file == "-" for stdin */ 1184 foreach_options = find_host ? HKF_WANT_MATCH : 0; 1185 foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0; 1186 if ((r = hostkeys_foreach(identity_file, 1187 hash_hosts ? known_hosts_hash : known_hosts_find_delete, &ctx, 1188 name, NULL, foreach_options)) != 0) 1189 fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r)); 1190 1191 if (inplace) 1192 fclose(ctx.out); 1193 1194 if (ctx.invalid) { 1195 error("%s is not a valid known_hosts file.", identity_file); 1196 if (inplace) { 1197 error("Not replacing existing known_hosts " 1198 "file because of errors"); 1199 unlink(tmp); 1200 } 1201 exit(1); 1202 } else if (delete_host && !ctx.found_key) { 1203 logit("Host %s not found in %s", name, identity_file); 1204 if (inplace) 1205 unlink(tmp); 1206 } else if (inplace) { 1207 /* Backup existing file */ 1208 if (unlink(old) == -1 && errno != ENOENT) 1209 fatal("unlink %.100s: %s", old, strerror(errno)); 1210 if (link(identity_file, old) == -1) 1211 fatal("link %.100s to %.100s: %s", identity_file, old, 1212 strerror(errno)); 1213 /* Move new one into place */ 1214 if (rename(tmp, identity_file) == -1) { 1215 error("rename\"%s\" to \"%s\": %s", tmp, identity_file, 1216 strerror(errno)); 1217 unlink(tmp); 1218 unlink(old); 1219 exit(1); 1220 } 1221 1222 printf("%s updated.\n", identity_file); 1223 printf("Original contents retained as %s\n", old); 1224 if (ctx.has_unhashed) { 1225 logit("WARNING: %s contains unhashed entries", old); 1226 logit("Delete this file to ensure privacy " 1227 "of hostnames"); 1228 } 1229 } 1230 1231 exit (find_host && !ctx.found_key); 1232 } 1233 1234 /* 1235 * Perform changing a passphrase. The argument is the passwd structure 1236 * for the current user. 1237 */ 1238 static void 1239 do_change_passphrase(struct passwd *pw) 1240 { 1241 char *comment; 1242 char *old_passphrase, *passphrase1, *passphrase2; 1243 struct stat st; 1244 struct sshkey *private; 1245 int r; 1246 1247 if (!have_identity) 1248 ask_filename(pw, "Enter file in which the key is"); 1249 if (stat(identity_file, &st) < 0) 1250 fatal("%s: %s", identity_file, strerror(errno)); 1251 /* Try to load the file with empty passphrase. */ 1252 r = sshkey_load_private(identity_file, "", &private, &comment); 1253 if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) { 1254 if (identity_passphrase) 1255 old_passphrase = xstrdup(identity_passphrase); 1256 else 1257 old_passphrase = 1258 read_passphrase("Enter old passphrase: ", 1259 RP_ALLOW_STDIN); 1260 r = sshkey_load_private(identity_file, old_passphrase, 1261 &private, &comment); 1262 explicit_bzero(old_passphrase, strlen(old_passphrase)); 1263 free(old_passphrase); 1264 if (r != 0) 1265 goto badkey; 1266 } else if (r != 0) { 1267 badkey: 1268 fatal("Failed to load key %s: %s", identity_file, ssh_err(r)); 1269 } 1270 if (comment) 1271 printf("Key has comment '%s'\n", comment); 1272 1273 /* Ask the new passphrase (twice). */ 1274 if (identity_new_passphrase) { 1275 passphrase1 = xstrdup(identity_new_passphrase); 1276 passphrase2 = NULL; 1277 } else { 1278 passphrase1 = 1279 read_passphrase("Enter new passphrase (empty for no " 1280 "passphrase): ", RP_ALLOW_STDIN); 1281 passphrase2 = read_passphrase("Enter same passphrase again: ", 1282 RP_ALLOW_STDIN); 1283 1284 /* Verify that they are the same. */ 1285 if (strcmp(passphrase1, passphrase2) != 0) { 1286 explicit_bzero(passphrase1, strlen(passphrase1)); 1287 explicit_bzero(passphrase2, strlen(passphrase2)); 1288 free(passphrase1); 1289 free(passphrase2); 1290 printf("Pass phrases do not match. Try again.\n"); 1291 exit(1); 1292 } 1293 /* Destroy the other copy. */ 1294 explicit_bzero(passphrase2, strlen(passphrase2)); 1295 free(passphrase2); 1296 } 1297 1298 /* Save the file using the new passphrase. */ 1299 if ((r = sshkey_save_private(private, identity_file, passphrase1, 1300 comment, use_new_format, new_format_cipher, rounds)) != 0) { 1301 error("Saving key \"%s\" failed: %s.", 1302 identity_file, ssh_err(r)); 1303 explicit_bzero(passphrase1, strlen(passphrase1)); 1304 free(passphrase1); 1305 sshkey_free(private); 1306 free(comment); 1307 exit(1); 1308 } 1309 /* Destroy the passphrase and the copy of the key in memory. */ 1310 explicit_bzero(passphrase1, strlen(passphrase1)); 1311 free(passphrase1); 1312 sshkey_free(private); /* Destroys contents */ 1313 free(comment); 1314 1315 printf("Your identification has been saved with the new passphrase.\n"); 1316 exit(0); 1317 } 1318 1319 /* 1320 * Print the SSHFP RR. 1321 */ 1322 static int 1323 do_print_resource_record(struct passwd *pw, char *fname, char *hname) 1324 { 1325 struct sshkey *public; 1326 char *comment = NULL; 1327 struct stat st; 1328 int r; 1329 1330 if (fname == NULL) 1331 fatal("%s: no filename", __func__); 1332 if (stat(fname, &st) < 0) { 1333 if (errno == ENOENT) 1334 return 0; 1335 fatal("%s: %s", fname, strerror(errno)); 1336 } 1337 if ((r = sshkey_load_public(fname, &public, &comment)) != 0) 1338 fatal("Failed to read v2 public key from \"%s\": %s.", 1339 fname, ssh_err(r)); 1340 export_dns_rr(hname, public, stdout, print_generic); 1341 sshkey_free(public); 1342 free(comment); 1343 return 1; 1344 } 1345 1346 /* 1347 * Change the comment of a private key file. 1348 */ 1349 static void 1350 do_change_comment(struct passwd *pw) 1351 { 1352 char new_comment[1024], *comment, *passphrase; 1353 struct sshkey *private; 1354 struct sshkey *public; 1355 struct stat st; 1356 FILE *f; 1357 int r, fd; 1358 1359 if (!have_identity) 1360 ask_filename(pw, "Enter file in which the key is"); 1361 if (stat(identity_file, &st) < 0) 1362 fatal("%s: %s", identity_file, strerror(errno)); 1363 if ((r = sshkey_load_private(identity_file, "", 1364 &private, &comment)) == 0) 1365 passphrase = xstrdup(""); 1366 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 1367 fatal("Cannot load private key \"%s\": %s.", 1368 identity_file, ssh_err(r)); 1369 else { 1370 if (identity_passphrase) 1371 passphrase = xstrdup(identity_passphrase); 1372 else if (identity_new_passphrase) 1373 passphrase = xstrdup(identity_new_passphrase); 1374 else 1375 passphrase = read_passphrase("Enter passphrase: ", 1376 RP_ALLOW_STDIN); 1377 /* Try to load using the passphrase. */ 1378 if ((r = sshkey_load_private(identity_file, passphrase, 1379 &private, &comment)) != 0) { 1380 explicit_bzero(passphrase, strlen(passphrase)); 1381 free(passphrase); 1382 fatal("Cannot load private key \"%s\": %s.", 1383 identity_file, ssh_err(r)); 1384 } 1385 } 1386 /* XXX what about new-format keys? */ 1387 if (private->type != KEY_RSA1) { 1388 error("Comments are only supported for RSA1 keys."); 1389 explicit_bzero(passphrase, strlen(passphrase)); 1390 sshkey_free(private); 1391 exit(1); 1392 } 1393 printf("Key now has comment '%s'\n", comment); 1394 1395 if (identity_comment) { 1396 strlcpy(new_comment, identity_comment, sizeof(new_comment)); 1397 } else { 1398 printf("Enter new comment: "); 1399 fflush(stdout); 1400 if (!fgets(new_comment, sizeof(new_comment), stdin)) { 1401 explicit_bzero(passphrase, strlen(passphrase)); 1402 sshkey_free(private); 1403 exit(1); 1404 } 1405 new_comment[strcspn(new_comment, "\n")] = '\0'; 1406 } 1407 1408 /* Save the file using the new passphrase. */ 1409 if ((r = sshkey_save_private(private, identity_file, passphrase, 1410 new_comment, use_new_format, new_format_cipher, rounds)) != 0) { 1411 error("Saving key \"%s\" failed: %s", 1412 identity_file, ssh_err(r)); 1413 explicit_bzero(passphrase, strlen(passphrase)); 1414 free(passphrase); 1415 sshkey_free(private); 1416 free(comment); 1417 exit(1); 1418 } 1419 explicit_bzero(passphrase, strlen(passphrase)); 1420 free(passphrase); 1421 if ((r = sshkey_from_private(private, &public)) != 0) 1422 fatal("key_from_private failed: %s", ssh_err(r)); 1423 sshkey_free(private); 1424 1425 strlcat(identity_file, ".pub", sizeof(identity_file)); 1426 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 1427 if (fd == -1) 1428 fatal("Could not save your public key in %s", identity_file); 1429 f = fdopen(fd, "w"); 1430 if (f == NULL) 1431 fatal("fdopen %s failed: %s", identity_file, strerror(errno)); 1432 if ((r = sshkey_write(public, f)) != 0) 1433 fatal("write key failed: %s", ssh_err(r)); 1434 sshkey_free(public); 1435 fprintf(f, " %s\n", new_comment); 1436 fclose(f); 1437 1438 free(comment); 1439 1440 printf("The comment in your key file has been changed.\n"); 1441 exit(0); 1442 } 1443 1444 static const char * 1445 fmt_validity(u_int64_t valid_from, u_int64_t valid_to) 1446 { 1447 char from[32], to[32]; 1448 static char ret[64]; 1449 time_t tt; 1450 struct tm *tm; 1451 1452 *from = *to = '\0'; 1453 if (valid_from == 0 && valid_to == 0xffffffffffffffffULL) 1454 return "forever"; 1455 1456 if (valid_from != 0) { 1457 /* XXX revisit INT_MAX in 2038 :) */ 1458 tt = valid_from > INT_MAX ? INT_MAX : valid_from; 1459 tm = localtime(&tt); 1460 strftime(from, sizeof(from), "%Y-%m-%dT%H:%M:%S", tm); 1461 } 1462 if (valid_to != 0xffffffffffffffffULL) { 1463 /* XXX revisit INT_MAX in 2038 :) */ 1464 tt = valid_to > INT_MAX ? INT_MAX : valid_to; 1465 tm = localtime(&tt); 1466 strftime(to, sizeof(to), "%Y-%m-%dT%H:%M:%S", tm); 1467 } 1468 1469 if (valid_from == 0) { 1470 snprintf(ret, sizeof(ret), "before %s", to); 1471 return ret; 1472 } 1473 if (valid_to == 0xffffffffffffffffULL) { 1474 snprintf(ret, sizeof(ret), "after %s", from); 1475 return ret; 1476 } 1477 1478 snprintf(ret, sizeof(ret), "from %s to %s", from, to); 1479 return ret; 1480 } 1481 1482 static void 1483 add_flag_option(struct sshbuf *c, const char *name) 1484 { 1485 int r; 1486 1487 debug3("%s: %s", __func__, name); 1488 if ((r = sshbuf_put_cstring(c, name)) != 0 || 1489 (r = sshbuf_put_string(c, NULL, 0)) != 0) 1490 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1491 } 1492 1493 static void 1494 add_string_option(struct sshbuf *c, const char *name, const char *value) 1495 { 1496 struct sshbuf *b; 1497 int r; 1498 1499 debug3("%s: %s=%s", __func__, name, value); 1500 if ((b = sshbuf_new()) == NULL) 1501 fatal("%s: sshbuf_new failed", __func__); 1502 if ((r = sshbuf_put_cstring(b, value)) != 0 || 1503 (r = sshbuf_put_cstring(c, name)) != 0 || 1504 (r = sshbuf_put_stringb(c, b)) != 0) 1505 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1506 1507 sshbuf_free(b); 1508 } 1509 1510 #define OPTIONS_CRITICAL 1 1511 #define OPTIONS_EXTENSIONS 2 1512 static void 1513 prepare_options_buf(struct sshbuf *c, int which) 1514 { 1515 sshbuf_reset(c); 1516 if ((which & OPTIONS_CRITICAL) != 0 && 1517 certflags_command != NULL) 1518 add_string_option(c, "force-command", certflags_command); 1519 if ((which & OPTIONS_EXTENSIONS) != 0 && 1520 (certflags_flags & CERTOPT_X_FWD) != 0) 1521 add_flag_option(c, "permit-X11-forwarding"); 1522 if ((which & OPTIONS_EXTENSIONS) != 0 && 1523 (certflags_flags & CERTOPT_AGENT_FWD) != 0) 1524 add_flag_option(c, "permit-agent-forwarding"); 1525 if ((which & OPTIONS_EXTENSIONS) != 0 && 1526 (certflags_flags & CERTOPT_PORT_FWD) != 0) 1527 add_flag_option(c, "permit-port-forwarding"); 1528 if ((which & OPTIONS_EXTENSIONS) != 0 && 1529 (certflags_flags & CERTOPT_PTY) != 0) 1530 add_flag_option(c, "permit-pty"); 1531 if ((which & OPTIONS_EXTENSIONS) != 0 && 1532 (certflags_flags & CERTOPT_USER_RC) != 0) 1533 add_flag_option(c, "permit-user-rc"); 1534 if ((which & OPTIONS_CRITICAL) != 0 && 1535 certflags_src_addr != NULL) 1536 add_string_option(c, "source-address", certflags_src_addr); 1537 } 1538 1539 static struct sshkey * 1540 load_pkcs11_key(char *path) 1541 { 1542 #ifdef ENABLE_PKCS11 1543 struct sshkey **keys = NULL, *public, *private = NULL; 1544 int r, i, nkeys; 1545 1546 if ((r = sshkey_load_public(path, &public, NULL)) != 0) 1547 fatal("Couldn't load CA public key \"%s\": %s", 1548 path, ssh_err(r)); 1549 1550 nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys); 1551 debug3("%s: %d keys", __func__, nkeys); 1552 if (nkeys <= 0) 1553 fatal("cannot read public key from pkcs11"); 1554 for (i = 0; i < nkeys; i++) { 1555 if (sshkey_equal_public(public, keys[i])) { 1556 private = keys[i]; 1557 continue; 1558 } 1559 sshkey_free(keys[i]); 1560 } 1561 free(keys); 1562 sshkey_free(public); 1563 return private; 1564 #else 1565 fatal("no pkcs11 support"); 1566 #endif /* ENABLE_PKCS11 */ 1567 } 1568 1569 static void 1570 do_ca_sign(struct passwd *pw, int argc, char **argv) 1571 { 1572 int r, i, fd; 1573 u_int n; 1574 struct sshkey *ca, *public; 1575 char *otmp, *tmp, *cp, *out, *comment, **plist = NULL; 1576 FILE *f; 1577 1578 #ifdef ENABLE_PKCS11 1579 pkcs11_init(1); 1580 #endif 1581 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 1582 if (pkcs11provider != NULL) { 1583 if ((ca = load_pkcs11_key(tmp)) == NULL) 1584 fatal("No PKCS#11 key matching %s found", ca_key_path); 1585 } else 1586 ca = load_identity(tmp); 1587 free(tmp); 1588 1589 for (i = 0; i < argc; i++) { 1590 /* Split list of principals */ 1591 n = 0; 1592 if (cert_principals != NULL) { 1593 otmp = tmp = xstrdup(cert_principals); 1594 plist = NULL; 1595 for (; (cp = strsep(&tmp, ",")) != NULL; n++) { 1596 plist = xreallocarray(plist, n + 1, sizeof(*plist)); 1597 if (*(plist[n] = xstrdup(cp)) == '\0') 1598 fatal("Empty principal name"); 1599 } 1600 free(otmp); 1601 } 1602 1603 tmp = tilde_expand_filename(argv[i], pw->pw_uid); 1604 if ((r = sshkey_load_public(tmp, &public, &comment)) != 0) 1605 fatal("%s: unable to open \"%s\": %s", 1606 __func__, tmp, ssh_err(r)); 1607 if (public->type != KEY_RSA && public->type != KEY_DSA && 1608 public->type != KEY_ECDSA && public->type != KEY_ED25519) 1609 fatal("%s: key \"%s\" type %s cannot be certified", 1610 __func__, tmp, sshkey_type(public)); 1611 1612 /* Prepare certificate to sign */ 1613 if ((r = sshkey_to_certified(public)) != 0) 1614 fatal("Could not upgrade key %s to certificate: %s", 1615 tmp, ssh_err(r)); 1616 public->cert->type = cert_key_type; 1617 public->cert->serial = (u_int64_t)cert_serial; 1618 public->cert->key_id = xstrdup(cert_key_id); 1619 public->cert->nprincipals = n; 1620 public->cert->principals = plist; 1621 public->cert->valid_after = cert_valid_from; 1622 public->cert->valid_before = cert_valid_to; 1623 prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL); 1624 prepare_options_buf(public->cert->extensions, 1625 OPTIONS_EXTENSIONS); 1626 if ((r = sshkey_from_private(ca, 1627 &public->cert->signature_key)) != 0) 1628 fatal("key_from_private (ca key): %s", ssh_err(r)); 1629 1630 if (sshkey_certify(public, ca) != 0) 1631 fatal("Couldn't not certify key %s", tmp); 1632 1633 if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0) 1634 *cp = '\0'; 1635 xasprintf(&out, "%s-cert.pub", tmp); 1636 free(tmp); 1637 1638 if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 1639 fatal("Could not open \"%s\" for writing: %s", out, 1640 strerror(errno)); 1641 if ((f = fdopen(fd, "w")) == NULL) 1642 fatal("%s: fdopen: %s", __func__, strerror(errno)); 1643 if ((r = sshkey_write(public, f)) != 0) 1644 fatal("Could not write certified key to %s: %s", 1645 out, ssh_err(r)); 1646 fprintf(f, " %s\n", comment); 1647 fclose(f); 1648 1649 if (!quiet) { 1650 logit("Signed %s key %s: id \"%s\" serial %llu%s%s " 1651 "valid %s", sshkey_cert_type(public), 1652 out, public->cert->key_id, 1653 (unsigned long long)public->cert->serial, 1654 cert_principals != NULL ? " for " : "", 1655 cert_principals != NULL ? cert_principals : "", 1656 fmt_validity(cert_valid_from, cert_valid_to)); 1657 } 1658 1659 sshkey_free(public); 1660 free(out); 1661 } 1662 #ifdef ENABLE_PKCS11 1663 pkcs11_terminate(); 1664 #endif 1665 exit(0); 1666 } 1667 1668 static u_int64_t 1669 parse_relative_time(const char *s, time_t now) 1670 { 1671 int64_t mul, secs; 1672 1673 mul = *s == '-' ? -1 : 1; 1674 1675 if ((secs = convtime(s + 1)) == -1) 1676 fatal("Invalid relative certificate time %s", s); 1677 if (mul == -1 && secs > now) 1678 fatal("Certificate time %s cannot be represented", s); 1679 return now + (u_int64_t)(secs * mul); 1680 } 1681 1682 static u_int64_t 1683 parse_absolute_time(const char *s) 1684 { 1685 struct tm tm; 1686 time_t tt; 1687 char buf[32], *fmt; 1688 1689 /* 1690 * POSIX strptime says "The application shall ensure that there 1691 * is white-space or other non-alphanumeric characters between 1692 * any two conversion specifications" so arrange things this way. 1693 */ 1694 switch (strlen(s)) { 1695 case 8: 1696 fmt = "%Y-%m-%d"; 1697 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6); 1698 break; 1699 case 14: 1700 fmt = "%Y-%m-%dT%H:%M:%S"; 1701 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s", 1702 s, s + 4, s + 6, s + 8, s + 10, s + 12); 1703 break; 1704 default: 1705 fatal("Invalid certificate time format %s", s); 1706 } 1707 1708 memset(&tm, 0, sizeof(tm)); 1709 if (strptime(buf, fmt, &tm) == NULL) 1710 fatal("Invalid certificate time %s", s); 1711 if ((tt = mktime(&tm)) < 0) 1712 fatal("Certificate time %s cannot be represented", s); 1713 return (u_int64_t)tt; 1714 } 1715 1716 static void 1717 parse_cert_times(char *timespec) 1718 { 1719 char *from, *to; 1720 time_t now = time(NULL); 1721 int64_t secs; 1722 1723 /* +timespec relative to now */ 1724 if (*timespec == '+' && strchr(timespec, ':') == NULL) { 1725 if ((secs = convtime(timespec + 1)) == -1) 1726 fatal("Invalid relative certificate life %s", timespec); 1727 cert_valid_to = now + secs; 1728 /* 1729 * Backdate certificate one minute to avoid problems on hosts 1730 * with poorly-synchronised clocks. 1731 */ 1732 cert_valid_from = ((now - 59)/ 60) * 60; 1733 return; 1734 } 1735 1736 /* 1737 * from:to, where 1738 * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS 1739 * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS 1740 */ 1741 from = xstrdup(timespec); 1742 to = strchr(from, ':'); 1743 if (to == NULL || from == to || *(to + 1) == '\0') 1744 fatal("Invalid certificate life specification %s", timespec); 1745 *to++ = '\0'; 1746 1747 if (*from == '-' || *from == '+') 1748 cert_valid_from = parse_relative_time(from, now); 1749 else 1750 cert_valid_from = parse_absolute_time(from); 1751 1752 if (*to == '-' || *to == '+') 1753 cert_valid_to = parse_relative_time(to, now); 1754 else 1755 cert_valid_to = parse_absolute_time(to); 1756 1757 if (cert_valid_to <= cert_valid_from) 1758 fatal("Empty certificate validity interval"); 1759 free(from); 1760 } 1761 1762 static void 1763 add_cert_option(char *opt) 1764 { 1765 char *val; 1766 1767 if (strcasecmp(opt, "clear") == 0) 1768 certflags_flags = 0; 1769 else if (strcasecmp(opt, "no-x11-forwarding") == 0) 1770 certflags_flags &= ~CERTOPT_X_FWD; 1771 else if (strcasecmp(opt, "permit-x11-forwarding") == 0) 1772 certflags_flags |= CERTOPT_X_FWD; 1773 else if (strcasecmp(opt, "no-agent-forwarding") == 0) 1774 certflags_flags &= ~CERTOPT_AGENT_FWD; 1775 else if (strcasecmp(opt, "permit-agent-forwarding") == 0) 1776 certflags_flags |= CERTOPT_AGENT_FWD; 1777 else if (strcasecmp(opt, "no-port-forwarding") == 0) 1778 certflags_flags &= ~CERTOPT_PORT_FWD; 1779 else if (strcasecmp(opt, "permit-port-forwarding") == 0) 1780 certflags_flags |= CERTOPT_PORT_FWD; 1781 else if (strcasecmp(opt, "no-pty") == 0) 1782 certflags_flags &= ~CERTOPT_PTY; 1783 else if (strcasecmp(opt, "permit-pty") == 0) 1784 certflags_flags |= CERTOPT_PTY; 1785 else if (strcasecmp(opt, "no-user-rc") == 0) 1786 certflags_flags &= ~CERTOPT_USER_RC; 1787 else if (strcasecmp(opt, "permit-user-rc") == 0) 1788 certflags_flags |= CERTOPT_USER_RC; 1789 else if (strncasecmp(opt, "force-command=", 14) == 0) { 1790 val = opt + 14; 1791 if (*val == '\0') 1792 fatal("Empty force-command option"); 1793 if (certflags_command != NULL) 1794 fatal("force-command already specified"); 1795 certflags_command = xstrdup(val); 1796 } else if (strncasecmp(opt, "source-address=", 15) == 0) { 1797 val = opt + 15; 1798 if (*val == '\0') 1799 fatal("Empty source-address option"); 1800 if (certflags_src_addr != NULL) 1801 fatal("source-address already specified"); 1802 if (addr_match_cidr_list(NULL, val) != 0) 1803 fatal("Invalid source-address list"); 1804 certflags_src_addr = xstrdup(val); 1805 } else 1806 fatal("Unsupported certificate option \"%s\"", opt); 1807 } 1808 1809 static void 1810 show_options(struct sshbuf *optbuf, int in_critical) 1811 { 1812 char *name, *arg; 1813 struct sshbuf *options, *option = NULL; 1814 int r; 1815 1816 if ((options = sshbuf_fromb(optbuf)) == NULL) 1817 fatal("%s: sshbuf_fromb failed", __func__); 1818 while (sshbuf_len(options) != 0) { 1819 sshbuf_free(option); 1820 option = NULL; 1821 if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 || 1822 (r = sshbuf_froms(options, &option)) != 0) 1823 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1824 printf(" %s", name); 1825 if (!in_critical && 1826 (strcmp(name, "permit-X11-forwarding") == 0 || 1827 strcmp(name, "permit-agent-forwarding") == 0 || 1828 strcmp(name, "permit-port-forwarding") == 0 || 1829 strcmp(name, "permit-pty") == 0 || 1830 strcmp(name, "permit-user-rc") == 0)) 1831 printf("\n"); 1832 else if (in_critical && 1833 (strcmp(name, "force-command") == 0 || 1834 strcmp(name, "source-address") == 0)) { 1835 if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0) 1836 fatal("%s: buffer error: %s", 1837 __func__, ssh_err(r)); 1838 printf(" %s\n", arg); 1839 free(arg); 1840 } else { 1841 printf(" UNKNOWN OPTION (len %zu)\n", 1842 sshbuf_len(option)); 1843 sshbuf_reset(option); 1844 } 1845 free(name); 1846 if (sshbuf_len(option) != 0) 1847 fatal("Option corrupt: extra data at end"); 1848 } 1849 sshbuf_free(option); 1850 sshbuf_free(options); 1851 } 1852 1853 static void 1854 do_show_cert(struct passwd *pw) 1855 { 1856 struct sshkey *key; 1857 struct stat st; 1858 char *key_fp, *ca_fp; 1859 u_int i; 1860 int r; 1861 1862 if (!have_identity) 1863 ask_filename(pw, "Enter file in which the key is"); 1864 if (stat(identity_file, &st) < 0) 1865 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 1866 if ((r = sshkey_load_public(identity_file, &key, NULL)) != 0) 1867 fatal("Cannot load public key \"%s\": %s", 1868 identity_file, ssh_err(r)); 1869 if (!sshkey_is_cert(key)) 1870 fatal("%s is not a certificate", identity_file); 1871 1872 key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT); 1873 ca_fp = sshkey_fingerprint(key->cert->signature_key, 1874 fingerprint_hash, SSH_FP_DEFAULT); 1875 if (key_fp == NULL || ca_fp == NULL) 1876 fatal("%s: sshkey_fingerprint fail", __func__); 1877 1878 printf("%s:\n", identity_file); 1879 printf(" Type: %s %s certificate\n", sshkey_ssh_name(key), 1880 sshkey_cert_type(key)); 1881 printf(" Public key: %s %s\n", sshkey_type(key), key_fp); 1882 printf(" Signing CA: %s %s\n", 1883 sshkey_type(key->cert->signature_key), ca_fp); 1884 printf(" Key ID: \"%s\"\n", key->cert->key_id); 1885 printf(" Serial: %llu\n", (unsigned long long)key->cert->serial); 1886 printf(" Valid: %s\n", 1887 fmt_validity(key->cert->valid_after, key->cert->valid_before)); 1888 printf(" Principals: "); 1889 if (key->cert->nprincipals == 0) 1890 printf("(none)\n"); 1891 else { 1892 for (i = 0; i < key->cert->nprincipals; i++) 1893 printf("\n %s", 1894 key->cert->principals[i]); 1895 printf("\n"); 1896 } 1897 printf(" Critical Options: "); 1898 if (sshbuf_len(key->cert->critical) == 0) 1899 printf("(none)\n"); 1900 else { 1901 printf("\n"); 1902 show_options(key->cert->critical, 1); 1903 } 1904 printf(" Extensions: "); 1905 if (sshbuf_len(key->cert->extensions) == 0) 1906 printf("(none)\n"); 1907 else { 1908 printf("\n"); 1909 show_options(key->cert->extensions, 0); 1910 } 1911 exit(0); 1912 } 1913 1914 static void 1915 load_krl(const char *path, struct ssh_krl **krlp) 1916 { 1917 struct sshbuf *krlbuf; 1918 int r, fd; 1919 1920 if ((krlbuf = sshbuf_new()) == NULL) 1921 fatal("sshbuf_new failed"); 1922 if ((fd = open(path, O_RDONLY)) == -1) 1923 fatal("open %s: %s", path, strerror(errno)); 1924 if ((r = sshkey_load_file(fd, krlbuf)) != 0) 1925 fatal("Unable to load KRL: %s", ssh_err(r)); 1926 close(fd); 1927 /* XXX check sigs */ 1928 if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 || 1929 *krlp == NULL) 1930 fatal("Invalid KRL file: %s", ssh_err(r)); 1931 sshbuf_free(krlbuf); 1932 } 1933 1934 static void 1935 update_krl_from_file(struct passwd *pw, const char *file, int wild_ca, 1936 const struct sshkey *ca, struct ssh_krl *krl) 1937 { 1938 struct sshkey *key = NULL; 1939 u_long lnum = 0; 1940 char *path, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES]; 1941 unsigned long long serial, serial2; 1942 int i, was_explicit_key, was_sha1, r; 1943 FILE *krl_spec; 1944 1945 path = tilde_expand_filename(file, pw->pw_uid); 1946 if (strcmp(path, "-") == 0) { 1947 krl_spec = stdin; 1948 free(path); 1949 path = xstrdup("(standard input)"); 1950 } else if ((krl_spec = fopen(path, "r")) == NULL) 1951 fatal("fopen %s: %s", path, strerror(errno)); 1952 1953 if (!quiet) 1954 printf("Revoking from %s\n", path); 1955 while (read_keyfile_line(krl_spec, path, line, sizeof(line), 1956 &lnum) == 0) { 1957 was_explicit_key = was_sha1 = 0; 1958 cp = line + strspn(line, " \t"); 1959 /* Trim trailing space, comments and strip \n */ 1960 for (i = 0, r = -1; cp[i] != '\0'; i++) { 1961 if (cp[i] == '#' || cp[i] == '\n') { 1962 cp[i] = '\0'; 1963 break; 1964 } 1965 if (cp[i] == ' ' || cp[i] == '\t') { 1966 /* Remember the start of a span of whitespace */ 1967 if (r == -1) 1968 r = i; 1969 } else 1970 r = -1; 1971 } 1972 if (r != -1) 1973 cp[r] = '\0'; 1974 if (*cp == '\0') 1975 continue; 1976 if (strncasecmp(cp, "serial:", 7) == 0) { 1977 if (ca == NULL && !wild_ca) { 1978 fatal("revoking certificates by serial number " 1979 "requires specification of a CA key"); 1980 } 1981 cp += 7; 1982 cp = cp + strspn(cp, " \t"); 1983 errno = 0; 1984 serial = strtoull(cp, &ep, 0); 1985 if (*cp == '\0' || (*ep != '\0' && *ep != '-')) 1986 fatal("%s:%lu: invalid serial \"%s\"", 1987 path, lnum, cp); 1988 if (errno == ERANGE && serial == ULLONG_MAX) 1989 fatal("%s:%lu: serial out of range", 1990 path, lnum); 1991 serial2 = serial; 1992 if (*ep == '-') { 1993 cp = ep + 1; 1994 errno = 0; 1995 serial2 = strtoull(cp, &ep, 0); 1996 if (*cp == '\0' || *ep != '\0') 1997 fatal("%s:%lu: invalid serial \"%s\"", 1998 path, lnum, cp); 1999 if (errno == ERANGE && serial2 == ULLONG_MAX) 2000 fatal("%s:%lu: serial out of range", 2001 path, lnum); 2002 if (serial2 <= serial) 2003 fatal("%s:%lu: invalid serial range " 2004 "%llu:%llu", path, lnum, 2005 (unsigned long long)serial, 2006 (unsigned long long)serial2); 2007 } 2008 if (ssh_krl_revoke_cert_by_serial_range(krl, 2009 ca, serial, serial2) != 0) { 2010 fatal("%s: revoke serial failed", 2011 __func__); 2012 } 2013 } else if (strncasecmp(cp, "id:", 3) == 0) { 2014 if (ca == NULL && !wild_ca) { 2015 fatal("revoking certificates by key ID " 2016 "requires specification of a CA key"); 2017 } 2018 cp += 3; 2019 cp = cp + strspn(cp, " \t"); 2020 if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0) 2021 fatal("%s: revoke key ID failed", __func__); 2022 } else { 2023 if (strncasecmp(cp, "key:", 4) == 0) { 2024 cp += 4; 2025 cp = cp + strspn(cp, " \t"); 2026 was_explicit_key = 1; 2027 } else if (strncasecmp(cp, "sha1:", 5) == 0) { 2028 cp += 5; 2029 cp = cp + strspn(cp, " \t"); 2030 was_sha1 = 1; 2031 } else { 2032 /* 2033 * Just try to process the line as a key. 2034 * Parsing will fail if it isn't. 2035 */ 2036 } 2037 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 2038 fatal("key_new"); 2039 if ((r = sshkey_read(key, &cp)) != 0) 2040 fatal("%s:%lu: invalid key: %s", 2041 path, lnum, ssh_err(r)); 2042 if (was_explicit_key) 2043 r = ssh_krl_revoke_key_explicit(krl, key); 2044 else if (was_sha1) 2045 r = ssh_krl_revoke_key_sha1(krl, key); 2046 else 2047 r = ssh_krl_revoke_key(krl, key); 2048 if (r != 0) 2049 fatal("%s: revoke key failed: %s", 2050 __func__, ssh_err(r)); 2051 sshkey_free(key); 2052 } 2053 } 2054 if (strcmp(path, "-") != 0) 2055 fclose(krl_spec); 2056 free(path); 2057 } 2058 2059 static void 2060 do_gen_krl(struct passwd *pw, int updating, int argc, char **argv) 2061 { 2062 struct ssh_krl *krl; 2063 struct stat sb; 2064 struct sshkey *ca = NULL; 2065 int fd, i, r, wild_ca = 0; 2066 char *tmp; 2067 struct sshbuf *kbuf; 2068 2069 if (*identity_file == '\0') 2070 fatal("KRL generation requires an output file"); 2071 if (stat(identity_file, &sb) == -1) { 2072 if (errno != ENOENT) 2073 fatal("Cannot access KRL \"%s\": %s", 2074 identity_file, strerror(errno)); 2075 if (updating) 2076 fatal("KRL \"%s\" does not exist", identity_file); 2077 } 2078 if (ca_key_path != NULL) { 2079 if (strcasecmp(ca_key_path, "none") == 0) 2080 wild_ca = 1; 2081 else { 2082 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 2083 if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) 2084 fatal("Cannot load CA public key %s: %s", 2085 tmp, ssh_err(r)); 2086 free(tmp); 2087 } 2088 } 2089 2090 if (updating) 2091 load_krl(identity_file, &krl); 2092 else if ((krl = ssh_krl_init()) == NULL) 2093 fatal("couldn't create KRL"); 2094 2095 if (cert_serial != 0) 2096 ssh_krl_set_version(krl, cert_serial); 2097 if (identity_comment != NULL) 2098 ssh_krl_set_comment(krl, identity_comment); 2099 2100 for (i = 0; i < argc; i++) 2101 update_krl_from_file(pw, argv[i], wild_ca, ca, krl); 2102 2103 if ((kbuf = sshbuf_new()) == NULL) 2104 fatal("sshbuf_new failed"); 2105 if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0) 2106 fatal("Couldn't generate KRL"); 2107 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 2108 fatal("open %s: %s", identity_file, strerror(errno)); 2109 if (atomicio(vwrite, fd, (void *)sshbuf_ptr(kbuf), sshbuf_len(kbuf)) != 2110 sshbuf_len(kbuf)) 2111 fatal("write %s: %s", identity_file, strerror(errno)); 2112 close(fd); 2113 sshbuf_free(kbuf); 2114 ssh_krl_free(krl); 2115 if (ca != NULL) 2116 sshkey_free(ca); 2117 } 2118 2119 static void 2120 do_check_krl(struct passwd *pw, int argc, char **argv) 2121 { 2122 int i, r, ret = 0; 2123 char *comment; 2124 struct ssh_krl *krl; 2125 struct sshkey *k; 2126 2127 if (*identity_file == '\0') 2128 fatal("KRL checking requires an input file"); 2129 load_krl(identity_file, &krl); 2130 for (i = 0; i < argc; i++) { 2131 if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0) 2132 fatal("Cannot load public key %s: %s", 2133 argv[i], ssh_err(r)); 2134 r = ssh_krl_check_key(krl, k); 2135 printf("%s%s%s%s: %s\n", argv[i], 2136 *comment ? " (" : "", comment, *comment ? ")" : "", 2137 r == 0 ? "ok" : "REVOKED"); 2138 if (r != 0) 2139 ret = 1; 2140 sshkey_free(k); 2141 free(comment); 2142 } 2143 ssh_krl_free(krl); 2144 exit(ret); 2145 } 2146 2147 static void 2148 usage(void) 2149 { 2150 fprintf(stderr, 2151 "usage: ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa | rsa1]\n" 2152 " [-N new_passphrase] [-C comment] [-f output_keyfile]\n" 2153 " ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]\n" 2154 " ssh-keygen -i [-m key_format] [-f input_keyfile]\n" 2155 " ssh-keygen -e [-m key_format] [-f input_keyfile]\n" 2156 " ssh-keygen -y [-f input_keyfile]\n" 2157 " ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]\n" 2158 " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n" 2159 " ssh-keygen -B [-f input_keyfile]\n"); 2160 #ifdef ENABLE_PKCS11 2161 fprintf(stderr, 2162 " ssh-keygen -D pkcs11\n"); 2163 #endif 2164 fprintf(stderr, 2165 " ssh-keygen -F hostname [-f known_hosts_file] [-l]\n" 2166 " ssh-keygen -H [-f known_hosts_file]\n" 2167 " ssh-keygen -R hostname [-f known_hosts_file]\n" 2168 " ssh-keygen -r hostname [-f input_keyfile] [-g]\n" 2169 #ifdef WITH_OPENSSL 2170 " ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n" 2171 " ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]\n" 2172 " [-j start_line] [-K checkpt] [-W generator]\n" 2173 #endif 2174 " ssh-keygen -s ca_key -I certificate_identity [-h] [-n principals]\n" 2175 " [-O option] [-V validity_interval] [-z serial_number] file ...\n" 2176 " ssh-keygen -L [-f input_keyfile]\n" 2177 " ssh-keygen -A\n" 2178 " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n" 2179 " file ...\n" 2180 " ssh-keygen -Q -f krl_file file ...\n"); 2181 exit(1); 2182 } 2183 2184 /* 2185 * Main program for key management. 2186 */ 2187 int 2188 main(int argc, char **argv) 2189 { 2190 char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2; 2191 char *rr_hostname = NULL, *ep, *fp, *ra; 2192 struct sshkey *private, *public; 2193 struct passwd *pw; 2194 struct stat st; 2195 int r, opt, type, fd; 2196 int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0; 2197 FILE *f; 2198 const char *errstr; 2199 #ifdef WITH_OPENSSL 2200 /* Moduli generation/screening */ 2201 char out_file[PATH_MAX], *checkpoint = NULL; 2202 u_int32_t memory = 0, generator_wanted = 0; 2203 int do_gen_candidates = 0, do_screen_candidates = 0; 2204 unsigned long start_lineno = 0, lines_to_process = 0; 2205 BIGNUM *start = NULL; 2206 #endif 2207 2208 extern int optind; 2209 extern char *optarg; 2210 2211 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 2212 sanitise_stdfd(); 2213 2214 __progname = ssh_get_progname(argv[0]); 2215 2216 #ifdef WITH_OPENSSL 2217 OpenSSL_add_all_algorithms(); 2218 #endif 2219 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); 2220 2221 seed_rng(); 2222 2223 /* we need this for the home * directory. */ 2224 pw = getpwuid(getuid()); 2225 if (!pw) 2226 fatal("No user exists for uid %lu", (u_long)getuid()); 2227 if (gethostname(hostname, sizeof(hostname)) < 0) 2228 fatal("gethostname: %s", strerror(errno)); 2229 2230 /* Remaining characters: UYdw */ 2231 while ((opt = getopt(argc, argv, "ABHLQXceghiklopquvxy" 2232 "C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Z:" 2233 "a:b:f:g:j:m:n:r:s:t:z:")) != -1) { 2234 switch (opt) { 2235 case 'A': 2236 gen_all_hostkeys = 1; 2237 break; 2238 case 'b': 2239 bits = (u_int32_t)strtonum(optarg, 256, 32768, &errstr); 2240 if (errstr) 2241 fatal("Bits has bad value %s (%s)", 2242 optarg, errstr); 2243 break; 2244 case 'E': 2245 fingerprint_hash = ssh_digest_alg_by_name(optarg); 2246 if (fingerprint_hash == -1) 2247 fatal("Invalid hash algorithm \"%s\"", optarg); 2248 break; 2249 case 'F': 2250 find_host = 1; 2251 rr_hostname = optarg; 2252 break; 2253 case 'H': 2254 hash_hosts = 1; 2255 break; 2256 case 'I': 2257 cert_key_id = optarg; 2258 break; 2259 case 'R': 2260 delete_host = 1; 2261 rr_hostname = optarg; 2262 break; 2263 case 'L': 2264 show_cert = 1; 2265 break; 2266 case 'l': 2267 print_fingerprint = 1; 2268 break; 2269 case 'B': 2270 print_bubblebabble = 1; 2271 break; 2272 case 'm': 2273 if (strcasecmp(optarg, "RFC4716") == 0 || 2274 strcasecmp(optarg, "ssh2") == 0) { 2275 convert_format = FMT_RFC4716; 2276 break; 2277 } 2278 if (strcasecmp(optarg, "PKCS8") == 0) { 2279 convert_format = FMT_PKCS8; 2280 break; 2281 } 2282 if (strcasecmp(optarg, "PEM") == 0) { 2283 convert_format = FMT_PEM; 2284 break; 2285 } 2286 fatal("Unsupported conversion format \"%s\"", optarg); 2287 case 'n': 2288 cert_principals = optarg; 2289 break; 2290 case 'o': 2291 use_new_format = 1; 2292 break; 2293 case 'p': 2294 change_passphrase = 1; 2295 break; 2296 case 'c': 2297 change_comment = 1; 2298 break; 2299 case 'f': 2300 if (strlcpy(identity_file, optarg, 2301 sizeof(identity_file)) >= sizeof(identity_file)) 2302 fatal("Identity filename too long"); 2303 have_identity = 1; 2304 break; 2305 case 'g': 2306 print_generic = 1; 2307 break; 2308 case 'P': 2309 identity_passphrase = optarg; 2310 break; 2311 case 'N': 2312 identity_new_passphrase = optarg; 2313 break; 2314 case 'Q': 2315 check_krl = 1; 2316 break; 2317 case 'O': 2318 add_cert_option(optarg); 2319 break; 2320 case 'Z': 2321 new_format_cipher = optarg; 2322 break; 2323 case 'C': 2324 identity_comment = optarg; 2325 break; 2326 case 'q': 2327 quiet = 1; 2328 break; 2329 case 'e': 2330 case 'x': 2331 /* export key */ 2332 convert_to = 1; 2333 break; 2334 case 'h': 2335 cert_key_type = SSH2_CERT_TYPE_HOST; 2336 certflags_flags = 0; 2337 break; 2338 case 'k': 2339 gen_krl = 1; 2340 break; 2341 case 'i': 2342 case 'X': 2343 /* import key */ 2344 convert_from = 1; 2345 break; 2346 case 'y': 2347 print_public = 1; 2348 break; 2349 case 's': 2350 ca_key_path = optarg; 2351 break; 2352 case 't': 2353 key_type_name = optarg; 2354 break; 2355 case 'D': 2356 pkcs11provider = optarg; 2357 break; 2358 case 'u': 2359 update_krl = 1; 2360 break; 2361 case 'v': 2362 if (log_level == SYSLOG_LEVEL_INFO) 2363 log_level = SYSLOG_LEVEL_DEBUG1; 2364 else { 2365 if (log_level >= SYSLOG_LEVEL_DEBUG1 && 2366 log_level < SYSLOG_LEVEL_DEBUG3) 2367 log_level++; 2368 } 2369 break; 2370 case 'r': 2371 rr_hostname = optarg; 2372 break; 2373 case 'a': 2374 rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr); 2375 if (errstr) 2376 fatal("Invalid number: %s (%s)", 2377 optarg, errstr); 2378 break; 2379 case 'V': 2380 parse_cert_times(optarg); 2381 break; 2382 case 'z': 2383 errno = 0; 2384 cert_serial = strtoull(optarg, &ep, 10); 2385 if (*optarg < '0' || *optarg > '9' || *ep != '\0' || 2386 (errno == ERANGE && cert_serial == ULLONG_MAX)) 2387 fatal("Invalid serial number \"%s\"", optarg); 2388 break; 2389 #ifdef WITH_OPENSSL 2390 /* Moduli generation/screening */ 2391 case 'W': 2392 generator_wanted = (u_int32_t)strtonum(optarg, 1, 2393 UINT_MAX, &errstr); 2394 if (errstr) 2395 fatal("Desired generator has bad value: %s (%s)", 2396 optarg, errstr); 2397 break; 2398 case 'M': 2399 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); 2400 if (errstr) 2401 fatal("Memory limit is %s: %s", errstr, optarg); 2402 break; 2403 case 'G': 2404 do_gen_candidates = 1; 2405 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 2406 sizeof(out_file)) 2407 fatal("Output filename too long"); 2408 break; 2409 case 'T': 2410 do_screen_candidates = 1; 2411 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 2412 sizeof(out_file)) 2413 fatal("Output filename too long"); 2414 break; 2415 case 'K': 2416 if (strlen(optarg) >= PATH_MAX) 2417 fatal("Checkpoint filename too long"); 2418 checkpoint = xstrdup(optarg); 2419 break; 2420 case 'S': 2421 /* XXX - also compare length against bits */ 2422 if (BN_hex2bn(&start, optarg) == 0) 2423 fatal("Invalid start point."); 2424 break; 2425 #endif /* WITH_OPENSSL */ 2426 case '?': 2427 default: 2428 usage(); 2429 } 2430 } 2431 2432 /* reinit */ 2433 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); 2434 2435 argv += optind; 2436 argc -= optind; 2437 2438 if (ca_key_path != NULL) { 2439 if (argc < 1 && !gen_krl) { 2440 error("Too few arguments."); 2441 usage(); 2442 } 2443 } else if (argc > 0 && !gen_krl && !check_krl) { 2444 error("Too many arguments."); 2445 usage(); 2446 } 2447 if (change_passphrase && change_comment) { 2448 error("Can only have one of -p and -c."); 2449 usage(); 2450 } 2451 if (print_fingerprint && (delete_host || hash_hosts)) { 2452 error("Cannot use -l with -H or -R."); 2453 usage(); 2454 } 2455 if (gen_krl) { 2456 do_gen_krl(pw, update_krl, argc, argv); 2457 return (0); 2458 } 2459 if (check_krl) { 2460 do_check_krl(pw, argc, argv); 2461 return (0); 2462 } 2463 if (ca_key_path != NULL) { 2464 if (cert_key_id == NULL) 2465 fatal("Must specify key id (-I) when certifying"); 2466 do_ca_sign(pw, argc, argv); 2467 } 2468 if (show_cert) 2469 do_show_cert(pw); 2470 if (delete_host || hash_hosts || find_host) 2471 do_known_hosts(pw, rr_hostname); 2472 if (pkcs11provider != NULL) 2473 do_download(pw); 2474 if (print_fingerprint || print_bubblebabble) 2475 do_fingerprint(pw); 2476 if (change_passphrase) 2477 do_change_passphrase(pw); 2478 if (change_comment) 2479 do_change_comment(pw); 2480 #ifdef WITH_OPENSSL 2481 if (convert_to) 2482 do_convert_to(pw); 2483 if (convert_from) 2484 do_convert_from(pw); 2485 #endif 2486 if (print_public) 2487 do_print_public(pw); 2488 if (rr_hostname != NULL) { 2489 unsigned int n = 0; 2490 2491 if (have_identity) { 2492 n = do_print_resource_record(pw, 2493 identity_file, rr_hostname); 2494 if (n == 0) 2495 fatal("%s: %s", identity_file, strerror(errno)); 2496 exit(0); 2497 } else { 2498 2499 n += do_print_resource_record(pw, 2500 _PATH_HOST_RSA_KEY_FILE, rr_hostname); 2501 n += do_print_resource_record(pw, 2502 _PATH_HOST_DSA_KEY_FILE, rr_hostname); 2503 n += do_print_resource_record(pw, 2504 _PATH_HOST_ECDSA_KEY_FILE, rr_hostname); 2505 n += do_print_resource_record(pw, 2506 _PATH_HOST_ED25519_KEY_FILE, rr_hostname); 2507 if (n == 0) 2508 fatal("no keys found."); 2509 exit(0); 2510 } 2511 } 2512 2513 #ifdef WITH_OPENSSL 2514 if (do_gen_candidates) { 2515 FILE *out = fopen(out_file, "w"); 2516 2517 if (out == NULL) { 2518 error("Couldn't open modulus candidate file \"%s\": %s", 2519 out_file, strerror(errno)); 2520 return (1); 2521 } 2522 if (bits == 0) 2523 bits = DEFAULT_BITS; 2524 if (gen_candidates(out, memory, bits, start) != 0) 2525 fatal("modulus candidate generation failed"); 2526 2527 return (0); 2528 } 2529 2530 if (do_screen_candidates) { 2531 FILE *in; 2532 FILE *out = fopen(out_file, "a"); 2533 2534 if (have_identity && strcmp(identity_file, "-") != 0) { 2535 if ((in = fopen(identity_file, "r")) == NULL) { 2536 fatal("Couldn't open modulus candidate " 2537 "file \"%s\": %s", identity_file, 2538 strerror(errno)); 2539 } 2540 } else 2541 in = stdin; 2542 2543 if (out == NULL) { 2544 fatal("Couldn't open moduli file \"%s\": %s", 2545 out_file, strerror(errno)); 2546 } 2547 if (prime_test(in, out, rounds == 0 ? 100 : rounds, 2548 generator_wanted, checkpoint, 2549 start_lineno, lines_to_process) != 0) 2550 fatal("modulus screening failed"); 2551 return (0); 2552 } 2553 #endif 2554 2555 if (gen_all_hostkeys) { 2556 do_gen_all_hostkeys(pw); 2557 return (0); 2558 } 2559 2560 if (key_type_name == NULL) 2561 key_type_name = DEFAULT_KEY_TYPE_NAME; 2562 2563 type = sshkey_type_from_name(key_type_name); 2564 type_bits_valid(type, key_type_name, &bits); 2565 2566 if (!quiet) 2567 printf("Generating public/private %s key pair.\n", 2568 key_type_name); 2569 if ((r = sshkey_generate(type, bits, &private)) != 0) 2570 fatal("key_generate failed"); 2571 if ((r = sshkey_from_private(private, &public)) != 0) 2572 fatal("key_from_private failed: %s\n", ssh_err(r)); 2573 2574 if (!have_identity) 2575 ask_filename(pw, "Enter file in which to save the key"); 2576 2577 /* Create ~/.ssh directory if it doesn't already exist. */ 2578 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", 2579 pw->pw_dir, _PATH_SSH_USER_DIR); 2580 if (strstr(identity_file, dotsshdir) != NULL) { 2581 if (stat(dotsshdir, &st) < 0) { 2582 if (errno != ENOENT) { 2583 error("Could not stat %s: %s", dotsshdir, 2584 strerror(errno)); 2585 } else if (mkdir(dotsshdir, 0700) < 0) { 2586 error("Could not create directory '%s': %s", 2587 dotsshdir, strerror(errno)); 2588 } else if (!quiet) 2589 printf("Created directory '%s'.\n", dotsshdir); 2590 } 2591 } 2592 /* If the file already exists, ask the user to confirm. */ 2593 if (stat(identity_file, &st) >= 0) { 2594 char yesno[3]; 2595 printf("%s already exists.\n", identity_file); 2596 printf("Overwrite (y/n)? "); 2597 fflush(stdout); 2598 if (fgets(yesno, sizeof(yesno), stdin) == NULL) 2599 exit(1); 2600 if (yesno[0] != 'y' && yesno[0] != 'Y') 2601 exit(1); 2602 } 2603 /* Ask for a passphrase (twice). */ 2604 if (identity_passphrase) 2605 passphrase1 = xstrdup(identity_passphrase); 2606 else if (identity_new_passphrase) 2607 passphrase1 = xstrdup(identity_new_passphrase); 2608 else { 2609 passphrase_again: 2610 passphrase1 = 2611 read_passphrase("Enter passphrase (empty for no " 2612 "passphrase): ", RP_ALLOW_STDIN); 2613 passphrase2 = read_passphrase("Enter same passphrase again: ", 2614 RP_ALLOW_STDIN); 2615 if (strcmp(passphrase1, passphrase2) != 0) { 2616 /* 2617 * The passphrases do not match. Clear them and 2618 * retry. 2619 */ 2620 explicit_bzero(passphrase1, strlen(passphrase1)); 2621 explicit_bzero(passphrase2, strlen(passphrase2)); 2622 free(passphrase1); 2623 free(passphrase2); 2624 printf("Passphrases do not match. Try again.\n"); 2625 goto passphrase_again; 2626 } 2627 /* Clear the other copy of the passphrase. */ 2628 explicit_bzero(passphrase2, strlen(passphrase2)); 2629 free(passphrase2); 2630 } 2631 2632 if (identity_comment) { 2633 strlcpy(comment, identity_comment, sizeof(comment)); 2634 } else { 2635 /* Create default comment field for the passphrase. */ 2636 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); 2637 } 2638 2639 /* Save the key with the given passphrase and comment. */ 2640 if ((r = sshkey_save_private(private, identity_file, passphrase1, 2641 comment, use_new_format, new_format_cipher, rounds)) != 0) { 2642 error("Saving key \"%s\" failed: %s", 2643 identity_file, ssh_err(r)); 2644 explicit_bzero(passphrase1, strlen(passphrase1)); 2645 free(passphrase1); 2646 exit(1); 2647 } 2648 /* Clear the passphrase. */ 2649 explicit_bzero(passphrase1, strlen(passphrase1)); 2650 free(passphrase1); 2651 2652 /* Clear the private key and the random number generator. */ 2653 sshkey_free(private); 2654 2655 if (!quiet) 2656 printf("Your identification has been saved in %s.\n", identity_file); 2657 2658 strlcat(identity_file, ".pub", sizeof(identity_file)); 2659 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 2660 fatal("Unable to save public key to %s: %s", 2661 identity_file, strerror(errno)); 2662 if ((f = fdopen(fd, "w")) == NULL) 2663 fatal("fdopen %s failed: %s", identity_file, strerror(errno)); 2664 if ((r = sshkey_write(public, f)) != 0) 2665 error("write key failed: %s", ssh_err(r)); 2666 fprintf(f, " %s\n", comment); 2667 fclose(f); 2668 2669 if (!quiet) { 2670 fp = sshkey_fingerprint(public, fingerprint_hash, 2671 SSH_FP_DEFAULT); 2672 ra = sshkey_fingerprint(public, fingerprint_hash, 2673 SSH_FP_RANDOMART); 2674 if (fp == NULL || ra == NULL) 2675 fatal("sshkey_fingerprint failed"); 2676 printf("Your public key has been saved in %s.\n", 2677 identity_file); 2678 printf("The key fingerprint is:\n"); 2679 printf("%s %s\n", fp, comment); 2680 printf("The key's randomart image is:\n"); 2681 printf("%s\n", ra); 2682 free(ra); 2683 free(fp); 2684 } 2685 2686 sshkey_free(public); 2687 exit(0); 2688 } 2689