1 /* $OpenBSD: ssh-keygen.c,v 1.299 2017/03/10 04:26:06 djm Exp $ */ 2 /* 3 * Author: Tatu Ylonen <ylo (at) cs.hut.fi> 4 * Copyright (c) 1994 Tatu Ylonen <ylo (at) 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 #include <locale.h> 41 42 #include "xmalloc.h" 43 #include "sshkey.h" 44 #include "rsa.h" 45 #include "authfile.h" 46 #include "uuencode.h" 47 #include "sshbuf.h" 48 #include "pathnames.h" 49 #include "log.h" 50 #include "misc.h" 51 #include "match.h" 52 #include "hostfile.h" 53 #include "dns.h" 54 #include "ssh.h" 55 #include "ssh2.h" 56 #include "ssherr.h" 57 #include "ssh-pkcs11.h" 58 #include "atomicio.h" 59 #include "krl.h" 60 #include "digest.h" 61 #include "utf8.h" 62 63 #ifdef WITH_OPENSSL 64 # define DEFAULT_KEY_TYPE_NAME "rsa" 65 #else 66 # define DEFAULT_KEY_TYPE_NAME "ed25519" 67 #endif 68 69 /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ 70 #define DEFAULT_BITS 2048 71 #define DEFAULT_BITS_DSA 1024 72 #define DEFAULT_BITS_ECDSA 256 73 u_int32_t bits = 0; 74 75 /* 76 * Flag indicating that we just want to change the passphrase. This can be 77 * set on the command line. 78 */ 79 int change_passphrase = 0; 80 81 /* 82 * Flag indicating that we just want to change the comment. This can be set 83 * on the command line. 84 */ 85 int change_comment = 0; 86 87 int quiet = 0; 88 89 int log_level = SYSLOG_LEVEL_INFO; 90 91 /* Flag indicating that we want to hash a known_hosts file */ 92 int hash_hosts = 0; 93 /* Flag indicating that we want lookup a host in known_hosts file */ 94 int find_host = 0; 95 /* Flag indicating that we want to delete a host from a known_hosts file */ 96 int delete_host = 0; 97 98 /* Flag indicating that we want to show the contents of a certificate */ 99 int show_cert = 0; 100 101 /* Flag indicating that we just want to see the key fingerprint */ 102 int print_fingerprint = 0; 103 int print_bubblebabble = 0; 104 105 /* Hash algorithm to use for fingerprints. */ 106 int fingerprint_hash = SSH_FP_HASH_DEFAULT; 107 108 /* The identity file name, given on the command line or entered by the user. */ 109 char identity_file[1024]; 110 int have_identity = 0; 111 112 /* This is set to the passphrase if given on the command line. */ 113 char *identity_passphrase = NULL; 114 115 /* This is set to the new passphrase if given on the command line. */ 116 char *identity_new_passphrase = NULL; 117 118 /* This is set to the new comment if given on the command line. */ 119 char *identity_comment = NULL; 120 121 /* Path to CA key when certifying keys. */ 122 char *ca_key_path = NULL; 123 124 /* Certificate serial number */ 125 unsigned long long cert_serial = 0; 126 127 /* Key type when certifying */ 128 u_int cert_key_type = SSH2_CERT_TYPE_USER; 129 130 /* "key ID" of signed key */ 131 char *cert_key_id = NULL; 132 133 /* Comma-separated list of principal names for certifying keys */ 134 char *cert_principals = NULL; 135 136 /* Validity period for certificates */ 137 u_int64_t cert_valid_from = 0; 138 u_int64_t cert_valid_to = ~0ULL; 139 140 /* Certificate options */ 141 #define CERTOPT_X_FWD (1) 142 #define CERTOPT_AGENT_FWD (1<<1) 143 #define CERTOPT_PORT_FWD (1<<2) 144 #define CERTOPT_PTY (1<<3) 145 #define CERTOPT_USER_RC (1<<4) 146 #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \ 147 CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC) 148 u_int32_t certflags_flags = CERTOPT_DEFAULT; 149 char *certflags_command = NULL; 150 char *certflags_src_addr = NULL; 151 152 /* Conversion to/from various formats */ 153 int convert_to = 0; 154 int convert_from = 0; 155 enum { 156 FMT_RFC4716, 157 FMT_PKCS8, 158 FMT_PEM 159 } convert_format = FMT_RFC4716; 160 int print_public = 0; 161 int print_generic = 0; 162 163 char *key_type_name = NULL; 164 165 /* Load key from this PKCS#11 provider */ 166 char *pkcs11provider = NULL; 167 168 /* Use new OpenSSH private key format when writing SSH2 keys instead of PEM */ 169 int use_new_format = 0; 170 171 /* Cipher for new-format private keys */ 172 char *new_format_cipher = NULL; 173 174 /* 175 * Number of KDF rounds to derive new format keys / 176 * number of primality trials when screening moduli. 177 */ 178 int rounds = 0; 179 180 /* argv0 */ 181 extern char *__progname; 182 183 char hostname[NI_MAXHOST]; 184 185 #ifdef WITH_OPENSSL 186 /* moduli.c */ 187 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); 188 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long, 189 unsigned long); 190 #endif 191 192 static void 193 type_bits_valid(int type, const char *name, u_int32_t *bitsp) 194 { 195 #ifdef WITH_OPENSSL 196 u_int maxbits, nid; 197 #endif 198 199 if (type == KEY_UNSPEC) 200 fatal("unknown key type %s", key_type_name); 201 if (*bitsp == 0) { 202 #ifdef WITH_OPENSSL 203 if (type == KEY_DSA) 204 *bitsp = DEFAULT_BITS_DSA; 205 else if (type == KEY_ECDSA) { 206 if (name != NULL && 207 (nid = sshkey_ecdsa_nid_from_name(name)) > 0) 208 *bitsp = sshkey_curve_nid_to_bits(nid); 209 if (*bitsp == 0) 210 *bitsp = DEFAULT_BITS_ECDSA; 211 } else 212 #endif 213 *bitsp = DEFAULT_BITS; 214 } 215 #ifdef WITH_OPENSSL 216 maxbits = (type == KEY_DSA) ? 217 OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS; 218 if (*bitsp > maxbits) 219 fatal("key bits exceeds maximum %d", maxbits); 220 if (type == KEY_DSA && *bitsp != 1024) 221 fatal("DSA keys must be 1024 bits"); 222 else if (type != KEY_ECDSA && type != KEY_ED25519 && *bitsp < 1024) 223 fatal("Key must at least be 1024 bits"); 224 else if (type == KEY_ECDSA && sshkey_ecdsa_bits_to_nid(*bitsp) == -1) 225 fatal("Invalid ECDSA key length - valid lengths are " 226 "256, 384 or 521 bits"); 227 #endif 228 } 229 230 static void 231 ask_filename(struct passwd *pw, const char *prompt) 232 { 233 char buf[1024]; 234 char *name = NULL; 235 236 if (key_type_name == NULL) 237 name = _PATH_SSH_CLIENT_ID_RSA; 238 else { 239 switch (sshkey_type_from_name(key_type_name)) { 240 case KEY_RSA1: 241 name = _PATH_SSH_CLIENT_IDENTITY; 242 break; 243 case KEY_DSA_CERT: 244 case KEY_DSA: 245 name = _PATH_SSH_CLIENT_ID_DSA; 246 break; 247 #ifdef OPENSSL_HAS_ECC 248 case KEY_ECDSA_CERT: 249 case KEY_ECDSA: 250 name = _PATH_SSH_CLIENT_ID_ECDSA; 251 break; 252 #endif 253 case KEY_RSA_CERT: 254 case KEY_RSA: 255 name = _PATH_SSH_CLIENT_ID_RSA; 256 break; 257 case KEY_ED25519: 258 case KEY_ED25519_CERT: 259 name = _PATH_SSH_CLIENT_ID_ED25519; 260 break; 261 default: 262 fatal("bad key type"); 263 } 264 } 265 snprintf(identity_file, sizeof(identity_file), 266 "%s/%s", pw->pw_dir, name); 267 printf("%s (%s): ", prompt, identity_file); 268 fflush(stdout); 269 if (fgets(buf, sizeof(buf), stdin) == NULL) 270 exit(1); 271 buf[strcspn(buf, "\n")] = '\0'; 272 if (strcmp(buf, "") != 0) 273 strlcpy(identity_file, buf, sizeof(identity_file)); 274 have_identity = 1; 275 } 276 277 static struct sshkey * 278 load_identity(char *filename) 279 { 280 char *pass; 281 struct sshkey *prv; 282 int r; 283 284 if ((r = sshkey_load_private(filename, "", &prv, NULL)) == 0) 285 return prv; 286 if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 287 fatal("Load key \"%s\": %s", filename, ssh_err(r)); 288 if (identity_passphrase) 289 pass = xstrdup(identity_passphrase); 290 else 291 pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN); 292 r = sshkey_load_private(filename, pass, &prv, NULL); 293 explicit_bzero(pass, strlen(pass)); 294 free(pass); 295 if (r != 0) 296 fatal("Load key \"%s\": %s", filename, ssh_err(r)); 297 return prv; 298 } 299 300 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" 301 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" 302 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" 303 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb 304 305 #ifdef WITH_OPENSSL 306 static void 307 do_convert_to_ssh2(struct passwd *pw, struct sshkey *k) 308 { 309 size_t len; 310 u_char *blob; 311 char comment[61]; 312 int r; 313 314 if (k->type == KEY_RSA1) 315 fatal("version 1 keys are not supported"); 316 if ((r = sshkey_to_blob(k, &blob, &len)) != 0) 317 fatal("key_to_blob failed: %s", ssh_err(r)); 318 /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */ 319 snprintf(comment, sizeof(comment), 320 "%u-bit %s, converted by %s@%s from OpenSSH", 321 sshkey_size(k), sshkey_type(k), 322 pw->pw_name, hostname); 323 324 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); 325 fprintf(stdout, "Comment: \"%s\"\n", comment); 326 dump_base64(stdout, blob, len); 327 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); 328 sshkey_free(k); 329 free(blob); 330 exit(0); 331 } 332 333 static void 334 do_convert_to_pkcs8(struct sshkey *k) 335 { 336 switch (sshkey_type_plain(k->type)) { 337 case KEY_RSA1: 338 case KEY_RSA: 339 if (!PEM_write_RSA_PUBKEY(stdout, k->rsa)) 340 fatal("PEM_write_RSA_PUBKEY failed"); 341 break; 342 case KEY_DSA: 343 if (!PEM_write_DSA_PUBKEY(stdout, k->dsa)) 344 fatal("PEM_write_DSA_PUBKEY failed"); 345 break; 346 #ifdef OPENSSL_HAS_ECC 347 case KEY_ECDSA: 348 if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa)) 349 fatal("PEM_write_EC_PUBKEY failed"); 350 break; 351 #endif 352 default: 353 fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); 354 } 355 exit(0); 356 } 357 358 static void 359 do_convert_to_pem(struct sshkey *k) 360 { 361 switch (sshkey_type_plain(k->type)) { 362 case KEY_RSA1: 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("key_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 #ifdef OPENSSL_HAS_ECC 640 case EVP_PKEY_EC: 641 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 642 fatal("sshkey_new failed"); 643 (*k)->type = KEY_ECDSA; 644 (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey); 645 (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa); 646 break; 647 #endif 648 default: 649 fatal("%s: unsupported pubkey type %d", __func__, 650 EVP_PKEY_type(pubkey->type)); 651 } 652 EVP_PKEY_free(pubkey); 653 return; 654 } 655 656 static void 657 do_convert_from_pem(struct sshkey **k, int *private) 658 { 659 FILE *fp; 660 RSA *rsa; 661 #ifdef notyet 662 DSA *dsa; 663 #endif 664 665 if ((fp = fopen(identity_file, "r")) == NULL) 666 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 667 if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { 668 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 669 fatal("sshkey_new failed"); 670 (*k)->type = KEY_RSA; 671 (*k)->rsa = rsa; 672 fclose(fp); 673 return; 674 } 675 #if notyet /* OpenSSH 0.9.8 lacks this function */ 676 rewind(fp); 677 if ((dsa = PEM_read_DSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { 678 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 679 fatal("sshkey_new failed"); 680 (*k)->type = KEY_DSA; 681 (*k)->dsa = dsa; 682 fclose(fp); 683 return; 684 } 685 /* XXX ECDSA */ 686 #endif 687 fatal("%s: unrecognised raw private key format", __func__); 688 } 689 690 static void 691 do_convert_from(struct passwd *pw) 692 { 693 struct sshkey *k = NULL; 694 int r, private = 0, ok = 0; 695 struct stat st; 696 697 if (!have_identity) 698 ask_filename(pw, "Enter file in which the key is"); 699 if (stat(identity_file, &st) < 0) 700 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 701 702 switch (convert_format) { 703 case FMT_RFC4716: 704 do_convert_from_ssh2(pw, &k, &private); 705 break; 706 case FMT_PKCS8: 707 do_convert_from_pkcs8(&k, &private); 708 break; 709 case FMT_PEM: 710 do_convert_from_pem(&k, &private); 711 break; 712 default: 713 fatal("%s: unknown key format %d", __func__, convert_format); 714 } 715 716 if (!private) { 717 if ((r = sshkey_write(k, stdout)) == 0) 718 ok = 1; 719 if (ok) 720 fprintf(stdout, "\n"); 721 } else { 722 switch (k->type) { 723 case KEY_DSA: 724 ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, 725 NULL, 0, NULL, NULL); 726 break; 727 #ifdef OPENSSL_HAS_ECC 728 case KEY_ECDSA: 729 ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL, 730 NULL, 0, NULL, NULL); 731 break; 732 #endif 733 case KEY_RSA: 734 ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, 735 NULL, 0, NULL, NULL); 736 break; 737 default: 738 fatal("%s: unsupported key type %s", __func__, 739 sshkey_type(k)); 740 } 741 } 742 743 if (!ok) 744 fatal("key write failed"); 745 sshkey_free(k); 746 exit(0); 747 } 748 #endif 749 750 static void 751 do_print_public(struct passwd *pw) 752 { 753 struct sshkey *prv; 754 struct stat st; 755 int r; 756 757 if (!have_identity) 758 ask_filename(pw, "Enter file in which the key is"); 759 if (stat(identity_file, &st) < 0) 760 fatal("%s: %s", identity_file, strerror(errno)); 761 prv = load_identity(identity_file); 762 if ((r = sshkey_write(prv, stdout)) != 0) 763 error("key_write failed: %s", ssh_err(r)); 764 sshkey_free(prv); 765 fprintf(stdout, "\n"); 766 exit(0); 767 } 768 769 static void 770 do_download(struct passwd *pw) 771 { 772 #ifdef ENABLE_PKCS11 773 struct sshkey **keys = NULL; 774 int i, nkeys; 775 enum sshkey_fp_rep rep; 776 int fptype; 777 char *fp, *ra; 778 779 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 780 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 781 782 pkcs11_init(0); 783 nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys); 784 if (nkeys <= 0) 785 fatal("cannot read public key from pkcs11"); 786 for (i = 0; i < nkeys; i++) { 787 if (print_fingerprint) { 788 fp = sshkey_fingerprint(keys[i], fptype, rep); 789 ra = sshkey_fingerprint(keys[i], fingerprint_hash, 790 SSH_FP_RANDOMART); 791 if (fp == NULL || ra == NULL) 792 fatal("%s: sshkey_fingerprint fail", __func__); 793 printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]), 794 fp, sshkey_type(keys[i])); 795 if (log_level >= SYSLOG_LEVEL_VERBOSE) 796 printf("%s\n", ra); 797 free(ra); 798 free(fp); 799 } else { 800 (void) sshkey_write(keys[i], stdout); /* XXX check */ 801 fprintf(stdout, "\n"); 802 } 803 sshkey_free(keys[i]); 804 } 805 free(keys); 806 pkcs11_terminate(); 807 exit(0); 808 #else 809 fatal("no pkcs11 support"); 810 #endif /* ENABLE_PKCS11 */ 811 } 812 813 static struct sshkey * 814 try_read_key(char **cpp) 815 { 816 struct sshkey *ret; 817 int r; 818 819 if ((ret = sshkey_new(KEY_RSA1)) == NULL) 820 fatal("sshkey_new failed"); 821 /* Try RSA1 */ 822 if ((r = sshkey_read(ret, cpp)) == 0) 823 return ret; 824 /* Try modern */ 825 sshkey_free(ret); 826 if ((ret = sshkey_new(KEY_UNSPEC)) == NULL) 827 fatal("sshkey_new failed"); 828 if ((r = sshkey_read(ret, cpp)) == 0) 829 return ret; 830 /* Not a key */ 831 sshkey_free(ret); 832 return NULL; 833 } 834 835 static void 836 fingerprint_one_key(const struct sshkey *public, const char *comment) 837 { 838 char *fp = NULL, *ra = NULL; 839 enum sshkey_fp_rep rep; 840 int fptype; 841 842 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 843 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 844 fp = sshkey_fingerprint(public, fptype, rep); 845 ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART); 846 if (fp == NULL || ra == NULL) 847 fatal("%s: sshkey_fingerprint failed", __func__); 848 mprintf("%u %s %s (%s)\n", sshkey_size(public), fp, 849 comment ? comment : "no comment", sshkey_type(public)); 850 if (log_level >= SYSLOG_LEVEL_VERBOSE) 851 printf("%s\n", ra); 852 free(ra); 853 free(fp); 854 } 855 856 static void 857 fingerprint_private(const char *path) 858 { 859 struct stat st; 860 char *comment = NULL; 861 struct sshkey *public = NULL; 862 int r; 863 864 if (stat(identity_file, &st) < 0) 865 fatal("%s: %s", path, strerror(errno)); 866 if ((r = sshkey_load_public(path, &public, &comment)) != 0) { 867 debug("load public \"%s\": %s", path, ssh_err(r)); 868 if ((r = sshkey_load_private(path, NULL, 869 &public, &comment)) != 0) { 870 debug("load private \"%s\": %s", path, ssh_err(r)); 871 fatal("%s is not a key file.", path); 872 } 873 } 874 875 fingerprint_one_key(public, comment); 876 sshkey_free(public); 877 free(comment); 878 } 879 880 static void 881 do_fingerprint(struct passwd *pw) 882 { 883 FILE *f; 884 struct sshkey *public = NULL; 885 char *comment = NULL, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES]; 886 int i, invalid = 1; 887 const char *path; 888 u_long lnum = 0; 889 890 if (!have_identity) 891 ask_filename(pw, "Enter file in which the key is"); 892 path = identity_file; 893 894 if (strcmp(identity_file, "-") == 0) { 895 f = stdin; 896 path = "(stdin)"; 897 } else if ((f = fopen(path, "r")) == NULL) 898 fatal("%s: %s: %s", __progname, path, strerror(errno)); 899 900 while (read_keyfile_line(f, path, line, sizeof(line), &lnum) == 0) { 901 cp = line; 902 cp[strcspn(cp, "\n")] = '\0'; 903 /* Trim leading space and comments */ 904 cp = line + strspn(line, " \t"); 905 if (*cp == '#' || *cp == '\0') 906 continue; 907 908 /* 909 * Input may be plain keys, private keys, authorized_keys 910 * or known_hosts. 911 */ 912 913 /* 914 * Try private keys first. Assume a key is private if 915 * "SSH PRIVATE KEY" appears on the first line and we're 916 * not reading from stdin (XXX support private keys on stdin). 917 */ 918 if (lnum == 1 && strcmp(identity_file, "-") != 0 && 919 strstr(cp, "PRIVATE KEY") != NULL) { 920 fclose(f); 921 fingerprint_private(path); 922 exit(0); 923 } 924 925 /* 926 * If it's not a private key, then this must be prepared to 927 * accept a public key prefixed with a hostname or options. 928 * Try a bare key first, otherwise skip the leading stuff. 929 */ 930 if ((public = try_read_key(&cp)) == NULL) { 931 i = strtol(cp, &ep, 10); 932 if (i == 0 || ep == NULL || 933 (*ep != ' ' && *ep != '\t')) { 934 int quoted = 0; 935 936 comment = cp; 937 for (; *cp && (quoted || (*cp != ' ' && 938 *cp != '\t')); cp++) { 939 if (*cp == '\\' && cp[1] == '"') 940 cp++; /* Skip both */ 941 else if (*cp == '"') 942 quoted = !quoted; 943 } 944 if (!*cp) 945 continue; 946 *cp++ = '\0'; 947 } 948 } 949 /* Retry after parsing leading hostname/key options */ 950 if (public == NULL && (public = try_read_key(&cp)) == NULL) { 951 debug("%s:%lu: not a public key", path, lnum); 952 continue; 953 } 954 955 /* Find trailing comment, if any */ 956 for (; *cp == ' ' || *cp == '\t'; cp++) 957 ; 958 if (*cp != '\0' && *cp != '#') 959 comment = cp; 960 961 fingerprint_one_key(public, comment); 962 sshkey_free(public); 963 invalid = 0; /* One good key in the file is sufficient */ 964 } 965 fclose(f); 966 967 if (invalid) 968 fatal("%s is not a public key file.", path); 969 exit(0); 970 } 971 972 static void 973 do_gen_all_hostkeys(struct passwd *pw) 974 { 975 struct { 976 char *key_type; 977 char *key_type_display; 978 char *path; 979 } key_types[] = { 980 #ifdef WITH_OPENSSL 981 #ifdef WITH_SSH1 982 { "rsa1", "RSA1", _PATH_HOST_KEY_FILE }, 983 #endif /* WITH_SSH1 */ 984 { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE }, 985 { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE }, 986 #ifdef OPENSSL_HAS_ECC 987 { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE }, 988 #endif /* OPENSSL_HAS_ECC */ 989 #endif /* WITH_OPENSSL */ 990 { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE }, 991 { NULL, NULL, NULL } 992 }; 993 994 int first = 0; 995 struct stat st; 996 struct sshkey *private, *public; 997 char comment[1024]; 998 int i, type, fd, r; 999 FILE *f; 1000 1001 for (i = 0; key_types[i].key_type; i++) { 1002 if (stat(key_types[i].path, &st) == 0) 1003 continue; 1004 if (errno != ENOENT) { 1005 error("Could not stat %s: %s", key_types[i].path, 1006 strerror(errno)); 1007 first = 0; 1008 continue; 1009 } 1010 1011 if (first == 0) { 1012 first = 1; 1013 printf("%s: generating new host keys: ", __progname); 1014 } 1015 printf("%s ", key_types[i].key_type_display); 1016 fflush(stdout); 1017 type = sshkey_type_from_name(key_types[i].key_type); 1018 strlcpy(identity_file, key_types[i].path, sizeof(identity_file)); 1019 bits = 0; 1020 type_bits_valid(type, NULL, &bits); 1021 if ((r = sshkey_generate(type, bits, &private)) != 0) { 1022 error("key_generate failed: %s", ssh_err(r)); 1023 first = 0; 1024 continue; 1025 } 1026 if ((r = sshkey_from_private(private, &public)) != 0) 1027 fatal("sshkey_from_private failed: %s", ssh_err(r)); 1028 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, 1029 hostname); 1030 if ((r = sshkey_save_private(private, identity_file, "", 1031 comment, use_new_format, new_format_cipher, rounds)) != 0) { 1032 error("Saving key \"%s\" failed: %s", 1033 identity_file, ssh_err(r)); 1034 sshkey_free(private); 1035 sshkey_free(public); 1036 first = 0; 1037 continue; 1038 } 1039 sshkey_free(private); 1040 strlcat(identity_file, ".pub", sizeof(identity_file)); 1041 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 1042 if (fd == -1) { 1043 error("Could not save your public key in %s", 1044 identity_file); 1045 sshkey_free(public); 1046 first = 0; 1047 continue; 1048 } 1049 f = fdopen(fd, "w"); 1050 if (f == NULL) { 1051 error("fdopen %s failed", identity_file); 1052 close(fd); 1053 sshkey_free(public); 1054 first = 0; 1055 continue; 1056 } 1057 if ((r = sshkey_write(public, f)) != 0) { 1058 error("write key failed: %s", ssh_err(r)); 1059 fclose(f); 1060 sshkey_free(public); 1061 first = 0; 1062 continue; 1063 } 1064 fprintf(f, " %s\n", comment); 1065 fclose(f); 1066 sshkey_free(public); 1067 1068 } 1069 if (first != 0) 1070 printf("\n"); 1071 } 1072 1073 struct known_hosts_ctx { 1074 const char *host; /* Hostname searched for in find/delete case */ 1075 FILE *out; /* Output file, stdout for find_hosts case */ 1076 int has_unhashed; /* When hashing, original had unhashed hosts */ 1077 int found_key; /* For find/delete, host was found */ 1078 int invalid; /* File contained invalid items; don't delete */ 1079 }; 1080 1081 static int 1082 known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx) 1083 { 1084 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1085 char *hashed, *cp, *hosts, *ohosts; 1086 int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts); 1087 int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM; 1088 1089 switch (l->status) { 1090 case HKF_STATUS_OK: 1091 case HKF_STATUS_MATCHED: 1092 /* 1093 * Don't hash hosts already already hashed, with wildcard 1094 * characters or a CA/revocation marker. 1095 */ 1096 if (was_hashed || has_wild || l->marker != MRK_NONE) { 1097 fprintf(ctx->out, "%s\n", l->line); 1098 if (has_wild && !find_host) { 1099 logit("%s:%lu: ignoring host name " 1100 "with wildcard: %.64s", l->path, 1101 l->linenum, l->hosts); 1102 } 1103 return 0; 1104 } 1105 /* 1106 * Split any comma-separated hostnames from the host list, 1107 * hash and store separately. 1108 */ 1109 ohosts = hosts = xstrdup(l->hosts); 1110 while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') { 1111 lowercase(cp); 1112 if ((hashed = host_hash(cp, NULL, 0)) == NULL) 1113 fatal("hash_host failed"); 1114 fprintf(ctx->out, "%s %s\n", hashed, l->rawkey); 1115 ctx->has_unhashed = 1; 1116 } 1117 free(ohosts); 1118 return 0; 1119 case HKF_STATUS_INVALID: 1120 /* Retain invalid lines, but mark file as invalid. */ 1121 ctx->invalid = 1; 1122 logit("%s:%lu: invalid line", l->path, l->linenum); 1123 /* FALLTHROUGH */ 1124 default: 1125 fprintf(ctx->out, "%s\n", l->line); 1126 return 0; 1127 } 1128 /* NOTREACHED */ 1129 return -1; 1130 } 1131 1132 static int 1133 known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx) 1134 { 1135 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1136 enum sshkey_fp_rep rep; 1137 int fptype; 1138 char *fp; 1139 1140 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 1141 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 1142 1143 if (l->status == HKF_STATUS_MATCHED) { 1144 if (delete_host) { 1145 if (l->marker != MRK_NONE) { 1146 /* Don't remove CA and revocation lines */ 1147 fprintf(ctx->out, "%s\n", l->line); 1148 } else { 1149 /* 1150 * Hostname matches and has no CA/revoke 1151 * marker, delete it by *not* writing the 1152 * line to ctx->out. 1153 */ 1154 ctx->found_key = 1; 1155 if (!quiet) 1156 printf("# Host %s found: line %lu\n", 1157 ctx->host, l->linenum); 1158 } 1159 return 0; 1160 } else if (find_host) { 1161 ctx->found_key = 1; 1162 if (!quiet) { 1163 printf("# Host %s found: line %lu %s\n", 1164 ctx->host, 1165 l->linenum, l->marker == MRK_CA ? "CA" : 1166 (l->marker == MRK_REVOKE ? "REVOKED" : "")); 1167 } 1168 if (hash_hosts) 1169 known_hosts_hash(l, ctx); 1170 else if (print_fingerprint) { 1171 fp = sshkey_fingerprint(l->key, fptype, rep); 1172 mprintf("%s %s %s %s\n", ctx->host, 1173 sshkey_type(l->key), fp, l->comment); 1174 free(fp); 1175 } else 1176 fprintf(ctx->out, "%s\n", l->line); 1177 return 0; 1178 } 1179 } else if (delete_host) { 1180 /* Retain non-matching hosts when deleting */ 1181 if (l->status == HKF_STATUS_INVALID) { 1182 ctx->invalid = 1; 1183 logit("%s:%lu: invalid line", l->path, l->linenum); 1184 } 1185 fprintf(ctx->out, "%s\n", l->line); 1186 } 1187 return 0; 1188 } 1189 1190 static void 1191 do_known_hosts(struct passwd *pw, const char *name) 1192 { 1193 char *cp, tmp[PATH_MAX], old[PATH_MAX]; 1194 int r, fd, oerrno, inplace = 0; 1195 struct known_hosts_ctx ctx; 1196 u_int foreach_options; 1197 1198 if (!have_identity) { 1199 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); 1200 if (strlcpy(identity_file, cp, sizeof(identity_file)) >= 1201 sizeof(identity_file)) 1202 fatal("Specified known hosts path too long"); 1203 free(cp); 1204 have_identity = 1; 1205 } 1206 1207 memset(&ctx, 0, sizeof(ctx)); 1208 ctx.out = stdout; 1209 ctx.host = name; 1210 1211 /* 1212 * Find hosts goes to stdout, hash and deletions happen in-place 1213 * A corner case is ssh-keygen -HF foo, which should go to stdout 1214 */ 1215 if (!find_host && (hash_hosts || delete_host)) { 1216 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || 1217 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || 1218 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || 1219 strlcat(old, ".old", sizeof(old)) >= sizeof(old)) 1220 fatal("known_hosts path too long"); 1221 umask(077); 1222 if ((fd = mkstemp(tmp)) == -1) 1223 fatal("mkstemp: %s", strerror(errno)); 1224 if ((ctx.out = fdopen(fd, "w")) == NULL) { 1225 oerrno = errno; 1226 unlink(tmp); 1227 fatal("fdopen: %s", strerror(oerrno)); 1228 } 1229 inplace = 1; 1230 } 1231 1232 /* XXX support identity_file == "-" for stdin */ 1233 foreach_options = find_host ? HKF_WANT_MATCH : 0; 1234 foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0; 1235 if ((r = hostkeys_foreach(identity_file, 1236 hash_hosts ? known_hosts_hash : known_hosts_find_delete, &ctx, 1237 name, NULL, foreach_options)) != 0) { 1238 if (inplace) 1239 unlink(tmp); 1240 fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r)); 1241 } 1242 1243 if (inplace) 1244 fclose(ctx.out); 1245 1246 if (ctx.invalid) { 1247 error("%s is not a valid known_hosts file.", identity_file); 1248 if (inplace) { 1249 error("Not replacing existing known_hosts " 1250 "file because of errors"); 1251 unlink(tmp); 1252 } 1253 exit(1); 1254 } else if (delete_host && !ctx.found_key) { 1255 logit("Host %s not found in %s", name, identity_file); 1256 if (inplace) 1257 unlink(tmp); 1258 } else if (inplace) { 1259 /* Backup existing file */ 1260 if (unlink(old) == -1 && errno != ENOENT) 1261 fatal("unlink %.100s: %s", old, strerror(errno)); 1262 if (link(identity_file, old) == -1) 1263 fatal("link %.100s to %.100s: %s", identity_file, old, 1264 strerror(errno)); 1265 /* Move new one into place */ 1266 if (rename(tmp, identity_file) == -1) { 1267 error("rename\"%s\" to \"%s\": %s", tmp, identity_file, 1268 strerror(errno)); 1269 unlink(tmp); 1270 unlink(old); 1271 exit(1); 1272 } 1273 1274 printf("%s updated.\n", identity_file); 1275 printf("Original contents retained as %s\n", old); 1276 if (ctx.has_unhashed) { 1277 logit("WARNING: %s contains unhashed entries", old); 1278 logit("Delete this file to ensure privacy " 1279 "of hostnames"); 1280 } 1281 } 1282 1283 exit (find_host && !ctx.found_key); 1284 } 1285 1286 /* 1287 * Perform changing a passphrase. The argument is the passwd structure 1288 * for the current user. 1289 */ 1290 static void 1291 do_change_passphrase(struct passwd *pw) 1292 { 1293 char *comment; 1294 char *old_passphrase, *passphrase1, *passphrase2; 1295 struct stat st; 1296 struct sshkey *private; 1297 int r; 1298 1299 if (!have_identity) 1300 ask_filename(pw, "Enter file in which the key is"); 1301 if (stat(identity_file, &st) < 0) 1302 fatal("%s: %s", identity_file, strerror(errno)); 1303 /* Try to load the file with empty passphrase. */ 1304 r = sshkey_load_private(identity_file, "", &private, &comment); 1305 if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) { 1306 if (identity_passphrase) 1307 old_passphrase = xstrdup(identity_passphrase); 1308 else 1309 old_passphrase = 1310 read_passphrase("Enter old passphrase: ", 1311 RP_ALLOW_STDIN); 1312 r = sshkey_load_private(identity_file, old_passphrase, 1313 &private, &comment); 1314 explicit_bzero(old_passphrase, strlen(old_passphrase)); 1315 free(old_passphrase); 1316 if (r != 0) 1317 goto badkey; 1318 } else if (r != 0) { 1319 badkey: 1320 fatal("Failed to load key %s: %s", identity_file, ssh_err(r)); 1321 } 1322 if (comment) 1323 mprintf("Key has comment '%s'\n", comment); 1324 1325 /* Ask the new passphrase (twice). */ 1326 if (identity_new_passphrase) { 1327 passphrase1 = xstrdup(identity_new_passphrase); 1328 passphrase2 = NULL; 1329 } else { 1330 passphrase1 = 1331 read_passphrase("Enter new passphrase (empty for no " 1332 "passphrase): ", RP_ALLOW_STDIN); 1333 passphrase2 = read_passphrase("Enter same passphrase again: ", 1334 RP_ALLOW_STDIN); 1335 1336 /* Verify that they are the same. */ 1337 if (strcmp(passphrase1, passphrase2) != 0) { 1338 explicit_bzero(passphrase1, strlen(passphrase1)); 1339 explicit_bzero(passphrase2, strlen(passphrase2)); 1340 free(passphrase1); 1341 free(passphrase2); 1342 printf("Pass phrases do not match. Try again.\n"); 1343 exit(1); 1344 } 1345 /* Destroy the other copy. */ 1346 explicit_bzero(passphrase2, strlen(passphrase2)); 1347 free(passphrase2); 1348 } 1349 1350 /* Save the file using the new passphrase. */ 1351 if ((r = sshkey_save_private(private, identity_file, passphrase1, 1352 comment, use_new_format, new_format_cipher, rounds)) != 0) { 1353 error("Saving key \"%s\" failed: %s.", 1354 identity_file, ssh_err(r)); 1355 explicit_bzero(passphrase1, strlen(passphrase1)); 1356 free(passphrase1); 1357 sshkey_free(private); 1358 free(comment); 1359 exit(1); 1360 } 1361 /* Destroy the passphrase and the copy of the key in memory. */ 1362 explicit_bzero(passphrase1, strlen(passphrase1)); 1363 free(passphrase1); 1364 sshkey_free(private); /* Destroys contents */ 1365 free(comment); 1366 1367 printf("Your identification has been saved with the new passphrase.\n"); 1368 exit(0); 1369 } 1370 1371 /* 1372 * Print the SSHFP RR. 1373 */ 1374 static int 1375 do_print_resource_record(struct passwd *pw, char *fname, char *hname) 1376 { 1377 struct sshkey *public; 1378 char *comment = NULL; 1379 struct stat st; 1380 int r; 1381 1382 if (fname == NULL) 1383 fatal("%s: no filename", __func__); 1384 if (stat(fname, &st) < 0) { 1385 if (errno == ENOENT) 1386 return 0; 1387 fatal("%s: %s", fname, strerror(errno)); 1388 } 1389 if ((r = sshkey_load_public(fname, &public, &comment)) != 0) 1390 fatal("Failed to read v2 public key from \"%s\": %s.", 1391 fname, ssh_err(r)); 1392 export_dns_rr(hname, public, stdout, print_generic); 1393 sshkey_free(public); 1394 free(comment); 1395 return 1; 1396 } 1397 1398 /* 1399 * Change the comment of a private key file. 1400 */ 1401 static void 1402 do_change_comment(struct passwd *pw) 1403 { 1404 char new_comment[1024], *comment, *passphrase; 1405 struct sshkey *private; 1406 struct sshkey *public; 1407 struct stat st; 1408 FILE *f; 1409 int r, fd; 1410 1411 if (!have_identity) 1412 ask_filename(pw, "Enter file in which the key is"); 1413 if (stat(identity_file, &st) < 0) 1414 fatal("%s: %s", identity_file, strerror(errno)); 1415 if ((r = sshkey_load_private(identity_file, "", 1416 &private, &comment)) == 0) 1417 passphrase = xstrdup(""); 1418 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 1419 fatal("Cannot load private key \"%s\": %s.", 1420 identity_file, ssh_err(r)); 1421 else { 1422 if (identity_passphrase) 1423 passphrase = xstrdup(identity_passphrase); 1424 else if (identity_new_passphrase) 1425 passphrase = xstrdup(identity_new_passphrase); 1426 else 1427 passphrase = read_passphrase("Enter passphrase: ", 1428 RP_ALLOW_STDIN); 1429 /* Try to load using the passphrase. */ 1430 if ((r = sshkey_load_private(identity_file, passphrase, 1431 &private, &comment)) != 0) { 1432 explicit_bzero(passphrase, strlen(passphrase)); 1433 free(passphrase); 1434 fatal("Cannot load private key \"%s\": %s.", 1435 identity_file, ssh_err(r)); 1436 } 1437 } 1438 1439 if (private->type != KEY_RSA1 && private->type != KEY_ED25519 && 1440 !use_new_format) { 1441 error("Comments are only supported for RSA1 or keys stored in " 1442 "the new format (-o)."); 1443 explicit_bzero(passphrase, strlen(passphrase)); 1444 sshkey_free(private); 1445 exit(1); 1446 } 1447 if (comment) 1448 printf("Key now has comment '%s'\n", comment); 1449 else 1450 printf("Key now has no comment\n"); 1451 1452 if (identity_comment) { 1453 strlcpy(new_comment, identity_comment, sizeof(new_comment)); 1454 } else { 1455 printf("Enter new comment: "); 1456 fflush(stdout); 1457 if (!fgets(new_comment, sizeof(new_comment), stdin)) { 1458 explicit_bzero(passphrase, strlen(passphrase)); 1459 sshkey_free(private); 1460 exit(1); 1461 } 1462 new_comment[strcspn(new_comment, "\n")] = '\0'; 1463 } 1464 1465 /* Save the file using the new passphrase. */ 1466 if ((r = sshkey_save_private(private, identity_file, passphrase, 1467 new_comment, use_new_format, new_format_cipher, rounds)) != 0) { 1468 error("Saving key \"%s\" failed: %s", 1469 identity_file, ssh_err(r)); 1470 explicit_bzero(passphrase, strlen(passphrase)); 1471 free(passphrase); 1472 sshkey_free(private); 1473 free(comment); 1474 exit(1); 1475 } 1476 explicit_bzero(passphrase, strlen(passphrase)); 1477 free(passphrase); 1478 if ((r = sshkey_from_private(private, &public)) != 0) 1479 fatal("key_from_private failed: %s", ssh_err(r)); 1480 sshkey_free(private); 1481 1482 strlcat(identity_file, ".pub", sizeof(identity_file)); 1483 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 1484 if (fd == -1) 1485 fatal("Could not save your public key in %s", identity_file); 1486 f = fdopen(fd, "w"); 1487 if (f == NULL) 1488 fatal("fdopen %s failed: %s", identity_file, strerror(errno)); 1489 if ((r = sshkey_write(public, f)) != 0) 1490 fatal("write key failed: %s", ssh_err(r)); 1491 sshkey_free(public); 1492 fprintf(f, " %s\n", new_comment); 1493 fclose(f); 1494 1495 free(comment); 1496 1497 printf("The comment in your key file has been changed.\n"); 1498 exit(0); 1499 } 1500 1501 static void 1502 add_flag_option(struct sshbuf *c, const char *name) 1503 { 1504 int r; 1505 1506 debug3("%s: %s", __func__, name); 1507 if ((r = sshbuf_put_cstring(c, name)) != 0 || 1508 (r = sshbuf_put_string(c, NULL, 0)) != 0) 1509 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1510 } 1511 1512 static void 1513 add_string_option(struct sshbuf *c, const char *name, const char *value) 1514 { 1515 struct sshbuf *b; 1516 int r; 1517 1518 debug3("%s: %s=%s", __func__, name, value); 1519 if ((b = sshbuf_new()) == NULL) 1520 fatal("%s: sshbuf_new failed", __func__); 1521 if ((r = sshbuf_put_cstring(b, value)) != 0 || 1522 (r = sshbuf_put_cstring(c, name)) != 0 || 1523 (r = sshbuf_put_stringb(c, b)) != 0) 1524 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1525 1526 sshbuf_free(b); 1527 } 1528 1529 #define OPTIONS_CRITICAL 1 1530 #define OPTIONS_EXTENSIONS 2 1531 static void 1532 prepare_options_buf(struct sshbuf *c, int which) 1533 { 1534 sshbuf_reset(c); 1535 if ((which & OPTIONS_CRITICAL) != 0 && 1536 certflags_command != NULL) 1537 add_string_option(c, "force-command", certflags_command); 1538 if ((which & OPTIONS_EXTENSIONS) != 0 && 1539 (certflags_flags & CERTOPT_X_FWD) != 0) 1540 add_flag_option(c, "permit-X11-forwarding"); 1541 if ((which & OPTIONS_EXTENSIONS) != 0 && 1542 (certflags_flags & CERTOPT_AGENT_FWD) != 0) 1543 add_flag_option(c, "permit-agent-forwarding"); 1544 if ((which & OPTIONS_EXTENSIONS) != 0 && 1545 (certflags_flags & CERTOPT_PORT_FWD) != 0) 1546 add_flag_option(c, "permit-port-forwarding"); 1547 if ((which & OPTIONS_EXTENSIONS) != 0 && 1548 (certflags_flags & CERTOPT_PTY) != 0) 1549 add_flag_option(c, "permit-pty"); 1550 if ((which & OPTIONS_EXTENSIONS) != 0 && 1551 (certflags_flags & CERTOPT_USER_RC) != 0) 1552 add_flag_option(c, "permit-user-rc"); 1553 if ((which & OPTIONS_CRITICAL) != 0 && 1554 certflags_src_addr != NULL) 1555 add_string_option(c, "source-address", certflags_src_addr); 1556 } 1557 1558 static struct sshkey * 1559 load_pkcs11_key(char *path) 1560 { 1561 #ifdef ENABLE_PKCS11 1562 struct sshkey **keys = NULL, *public, *private = NULL; 1563 int r, i, nkeys; 1564 1565 if ((r = sshkey_load_public(path, &public, NULL)) != 0) 1566 fatal("Couldn't load CA public key \"%s\": %s", 1567 path, ssh_err(r)); 1568 1569 nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys); 1570 debug3("%s: %d keys", __func__, nkeys); 1571 if (nkeys <= 0) 1572 fatal("cannot read public key from pkcs11"); 1573 for (i = 0; i < nkeys; i++) { 1574 if (sshkey_equal_public(public, keys[i])) { 1575 private = keys[i]; 1576 continue; 1577 } 1578 sshkey_free(keys[i]); 1579 } 1580 free(keys); 1581 sshkey_free(public); 1582 return private; 1583 #else 1584 fatal("no pkcs11 support"); 1585 #endif /* ENABLE_PKCS11 */ 1586 } 1587 1588 static void 1589 do_ca_sign(struct passwd *pw, int argc, char **argv) 1590 { 1591 int r, i, fd; 1592 u_int n; 1593 struct sshkey *ca, *public; 1594 char valid[64], *otmp, *tmp, *cp, *out, *comment, **plist = NULL; 1595 FILE *f; 1596 1597 #ifdef ENABLE_PKCS11 1598 pkcs11_init(1); 1599 #endif 1600 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 1601 if (pkcs11provider != NULL) { 1602 if ((ca = load_pkcs11_key(tmp)) == NULL) 1603 fatal("No PKCS#11 key matching %s found", ca_key_path); 1604 } else 1605 ca = load_identity(tmp); 1606 free(tmp); 1607 1608 if (key_type_name != NULL && 1609 sshkey_type_from_name(key_type_name) != ca->type) { 1610 fatal("CA key type %s doesn't match specified %s", 1611 sshkey_ssh_name(ca), key_type_name); 1612 } 1613 1614 for (i = 0; i < argc; i++) { 1615 /* Split list of principals */ 1616 n = 0; 1617 if (cert_principals != NULL) { 1618 otmp = tmp = xstrdup(cert_principals); 1619 plist = NULL; 1620 for (; (cp = strsep(&tmp, ",")) != NULL; n++) { 1621 plist = xreallocarray(plist, n + 1, sizeof(*plist)); 1622 if (*(plist[n] = xstrdup(cp)) == '\0') 1623 fatal("Empty principal name"); 1624 } 1625 free(otmp); 1626 } 1627 1628 tmp = tilde_expand_filename(argv[i], pw->pw_uid); 1629 if ((r = sshkey_load_public(tmp, &public, &comment)) != 0) 1630 fatal("%s: unable to open \"%s\": %s", 1631 __func__, tmp, ssh_err(r)); 1632 if (public->type != KEY_RSA && public->type != KEY_DSA && 1633 public->type != KEY_ECDSA && public->type != KEY_ED25519) 1634 fatal("%s: key \"%s\" type %s cannot be certified", 1635 __func__, tmp, sshkey_type(public)); 1636 1637 /* Prepare certificate to sign */ 1638 if ((r = sshkey_to_certified(public)) != 0) 1639 fatal("Could not upgrade key %s to certificate: %s", 1640 tmp, ssh_err(r)); 1641 public->cert->type = cert_key_type; 1642 public->cert->serial = (u_int64_t)cert_serial; 1643 public->cert->key_id = xstrdup(cert_key_id); 1644 public->cert->nprincipals = n; 1645 public->cert->principals = plist; 1646 public->cert->valid_after = cert_valid_from; 1647 public->cert->valid_before = cert_valid_to; 1648 prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL); 1649 prepare_options_buf(public->cert->extensions, 1650 OPTIONS_EXTENSIONS); 1651 if ((r = sshkey_from_private(ca, 1652 &public->cert->signature_key)) != 0) 1653 fatal("key_from_private (ca key): %s", ssh_err(r)); 1654 1655 if ((r = sshkey_certify(public, ca, key_type_name)) != 0) 1656 fatal("Couldn't certify key %s: %s", tmp, ssh_err(r)); 1657 1658 if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0) 1659 *cp = '\0'; 1660 xasprintf(&out, "%s-cert.pub", tmp); 1661 free(tmp); 1662 1663 if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 1664 fatal("Could not open \"%s\" for writing: %s", out, 1665 strerror(errno)); 1666 if ((f = fdopen(fd, "w")) == NULL) 1667 fatal("%s: fdopen: %s", __func__, strerror(errno)); 1668 if ((r = sshkey_write(public, f)) != 0) 1669 fatal("Could not write certified key to %s: %s", 1670 out, ssh_err(r)); 1671 fprintf(f, " %s\n", comment); 1672 fclose(f); 1673 1674 if (!quiet) { 1675 sshkey_format_cert_validity(public->cert, 1676 valid, sizeof(valid)); 1677 logit("Signed %s key %s: id \"%s\" serial %llu%s%s " 1678 "valid %s", sshkey_cert_type(public), 1679 out, public->cert->key_id, 1680 (unsigned long long)public->cert->serial, 1681 cert_principals != NULL ? " for " : "", 1682 cert_principals != NULL ? cert_principals : "", 1683 valid); 1684 } 1685 1686 sshkey_free(public); 1687 free(out); 1688 } 1689 #ifdef ENABLE_PKCS11 1690 pkcs11_terminate(); 1691 #endif 1692 exit(0); 1693 } 1694 1695 static u_int64_t 1696 parse_relative_time(const char *s, time_t now) 1697 { 1698 int64_t mul, secs; 1699 1700 mul = *s == '-' ? -1 : 1; 1701 1702 if ((secs = convtime(s + 1)) == -1) 1703 fatal("Invalid relative certificate time %s", s); 1704 if (mul == -1 && secs > now) 1705 fatal("Certificate time %s cannot be represented", s); 1706 return now + (u_int64_t)(secs * mul); 1707 } 1708 1709 static u_int64_t 1710 parse_absolute_time(const char *s) 1711 { 1712 struct tm tm; 1713 time_t tt; 1714 char buf[32], *fmt; 1715 1716 /* 1717 * POSIX strptime says "The application shall ensure that there 1718 * is white-space or other non-alphanumeric characters between 1719 * any two conversion specifications" so arrange things this way. 1720 */ 1721 switch (strlen(s)) { 1722 case 8: 1723 fmt = "%Y-%m-%d"; 1724 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6); 1725 break; 1726 case 14: 1727 fmt = "%Y-%m-%dT%H:%M:%S"; 1728 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s", 1729 s, s + 4, s + 6, s + 8, s + 10, s + 12); 1730 break; 1731 default: 1732 fatal("Invalid certificate time format %s", s); 1733 } 1734 1735 memset(&tm, 0, sizeof(tm)); 1736 if (strptime(buf, fmt, &tm) == NULL) 1737 fatal("Invalid certificate time %s", s); 1738 if ((tt = mktime(&tm)) < 0) 1739 fatal("Certificate time %s cannot be represented", s); 1740 return (u_int64_t)tt; 1741 } 1742 1743 static void 1744 parse_cert_times(char *timespec) 1745 { 1746 char *from, *to; 1747 time_t now = time(NULL); 1748 int64_t secs; 1749 1750 /* +timespec relative to now */ 1751 if (*timespec == '+' && strchr(timespec, ':') == NULL) { 1752 if ((secs = convtime(timespec + 1)) == -1) 1753 fatal("Invalid relative certificate life %s", timespec); 1754 cert_valid_to = now + secs; 1755 /* 1756 * Backdate certificate one minute to avoid problems on hosts 1757 * with poorly-synchronised clocks. 1758 */ 1759 cert_valid_from = ((now - 59)/ 60) * 60; 1760 return; 1761 } 1762 1763 /* 1764 * from:to, where 1765 * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS 1766 * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS 1767 */ 1768 from = xstrdup(timespec); 1769 to = strchr(from, ':'); 1770 if (to == NULL || from == to || *(to + 1) == '\0') 1771 fatal("Invalid certificate life specification %s", timespec); 1772 *to++ = '\0'; 1773 1774 if (*from == '-' || *from == '+') 1775 cert_valid_from = parse_relative_time(from, now); 1776 else 1777 cert_valid_from = parse_absolute_time(from); 1778 1779 if (*to == '-' || *to == '+') 1780 cert_valid_to = parse_relative_time(to, now); 1781 else 1782 cert_valid_to = parse_absolute_time(to); 1783 1784 if (cert_valid_to <= cert_valid_from) 1785 fatal("Empty certificate validity interval"); 1786 free(from); 1787 } 1788 1789 static void 1790 add_cert_option(char *opt) 1791 { 1792 char *val; 1793 1794 if (strcasecmp(opt, "clear") == 0) 1795 certflags_flags = 0; 1796 else if (strcasecmp(opt, "no-x11-forwarding") == 0) 1797 certflags_flags &= ~CERTOPT_X_FWD; 1798 else if (strcasecmp(opt, "permit-x11-forwarding") == 0) 1799 certflags_flags |= CERTOPT_X_FWD; 1800 else if (strcasecmp(opt, "no-agent-forwarding") == 0) 1801 certflags_flags &= ~CERTOPT_AGENT_FWD; 1802 else if (strcasecmp(opt, "permit-agent-forwarding") == 0) 1803 certflags_flags |= CERTOPT_AGENT_FWD; 1804 else if (strcasecmp(opt, "no-port-forwarding") == 0) 1805 certflags_flags &= ~CERTOPT_PORT_FWD; 1806 else if (strcasecmp(opt, "permit-port-forwarding") == 0) 1807 certflags_flags |= CERTOPT_PORT_FWD; 1808 else if (strcasecmp(opt, "no-pty") == 0) 1809 certflags_flags &= ~CERTOPT_PTY; 1810 else if (strcasecmp(opt, "permit-pty") == 0) 1811 certflags_flags |= CERTOPT_PTY; 1812 else if (strcasecmp(opt, "no-user-rc") == 0) 1813 certflags_flags &= ~CERTOPT_USER_RC; 1814 else if (strcasecmp(opt, "permit-user-rc") == 0) 1815 certflags_flags |= CERTOPT_USER_RC; 1816 else if (strncasecmp(opt, "force-command=", 14) == 0) { 1817 val = opt + 14; 1818 if (*val == '\0') 1819 fatal("Empty force-command option"); 1820 if (certflags_command != NULL) 1821 fatal("force-command already specified"); 1822 certflags_command = xstrdup(val); 1823 } else if (strncasecmp(opt, "source-address=", 15) == 0) { 1824 val = opt + 15; 1825 if (*val == '\0') 1826 fatal("Empty source-address option"); 1827 if (certflags_src_addr != NULL) 1828 fatal("source-address already specified"); 1829 if (addr_match_cidr_list(NULL, val) != 0) 1830 fatal("Invalid source-address list"); 1831 certflags_src_addr = xstrdup(val); 1832 } else 1833 fatal("Unsupported certificate option \"%s\"", opt); 1834 } 1835 1836 static void 1837 show_options(struct sshbuf *optbuf, int in_critical) 1838 { 1839 char *name, *arg; 1840 struct sshbuf *options, *option = NULL; 1841 int r; 1842 1843 if ((options = sshbuf_fromb(optbuf)) == NULL) 1844 fatal("%s: sshbuf_fromb failed", __func__); 1845 while (sshbuf_len(options) != 0) { 1846 sshbuf_free(option); 1847 option = NULL; 1848 if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 || 1849 (r = sshbuf_froms(options, &option)) != 0) 1850 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1851 printf(" %s", name); 1852 if (!in_critical && 1853 (strcmp(name, "permit-X11-forwarding") == 0 || 1854 strcmp(name, "permit-agent-forwarding") == 0 || 1855 strcmp(name, "permit-port-forwarding") == 0 || 1856 strcmp(name, "permit-pty") == 0 || 1857 strcmp(name, "permit-user-rc") == 0)) 1858 printf("\n"); 1859 else if (in_critical && 1860 (strcmp(name, "force-command") == 0 || 1861 strcmp(name, "source-address") == 0)) { 1862 if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0) 1863 fatal("%s: buffer error: %s", 1864 __func__, ssh_err(r)); 1865 printf(" %s\n", arg); 1866 free(arg); 1867 } else { 1868 printf(" UNKNOWN OPTION (len %zu)\n", 1869 sshbuf_len(option)); 1870 sshbuf_reset(option); 1871 } 1872 free(name); 1873 if (sshbuf_len(option) != 0) 1874 fatal("Option corrupt: extra data at end"); 1875 } 1876 sshbuf_free(option); 1877 sshbuf_free(options); 1878 } 1879 1880 static void 1881 print_cert(struct sshkey *key) 1882 { 1883 char valid[64], *key_fp, *ca_fp; 1884 u_int i; 1885 1886 key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT); 1887 ca_fp = sshkey_fingerprint(key->cert->signature_key, 1888 fingerprint_hash, SSH_FP_DEFAULT); 1889 if (key_fp == NULL || ca_fp == NULL) 1890 fatal("%s: sshkey_fingerprint fail", __func__); 1891 sshkey_format_cert_validity(key->cert, valid, sizeof(valid)); 1892 1893 printf(" Type: %s %s certificate\n", sshkey_ssh_name(key), 1894 sshkey_cert_type(key)); 1895 printf(" Public key: %s %s\n", sshkey_type(key), key_fp); 1896 printf(" Signing CA: %s %s\n", 1897 sshkey_type(key->cert->signature_key), ca_fp); 1898 printf(" Key ID: \"%s\"\n", key->cert->key_id); 1899 printf(" Serial: %llu\n", (unsigned long long)key->cert->serial); 1900 printf(" Valid: %s\n", valid); 1901 printf(" Principals: "); 1902 if (key->cert->nprincipals == 0) 1903 printf("(none)\n"); 1904 else { 1905 for (i = 0; i < key->cert->nprincipals; i++) 1906 printf("\n %s", 1907 key->cert->principals[i]); 1908 printf("\n"); 1909 } 1910 printf(" Critical Options: "); 1911 if (sshbuf_len(key->cert->critical) == 0) 1912 printf("(none)\n"); 1913 else { 1914 printf("\n"); 1915 show_options(key->cert->critical, 1); 1916 } 1917 printf(" Extensions: "); 1918 if (sshbuf_len(key->cert->extensions) == 0) 1919 printf("(none)\n"); 1920 else { 1921 printf("\n"); 1922 show_options(key->cert->extensions, 0); 1923 } 1924 } 1925 1926 static void 1927 do_show_cert(struct passwd *pw) 1928 { 1929 struct sshkey *key = NULL; 1930 struct stat st; 1931 int r, is_stdin = 0, ok = 0; 1932 FILE *f; 1933 char *cp, line[SSH_MAX_PUBKEY_BYTES]; 1934 const char *path; 1935 u_long lnum = 0; 1936 1937 if (!have_identity) 1938 ask_filename(pw, "Enter file in which the key is"); 1939 if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) < 0) 1940 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 1941 1942 path = identity_file; 1943 if (strcmp(path, "-") == 0) { 1944 f = stdin; 1945 path = "(stdin)"; 1946 is_stdin = 1; 1947 } else if ((f = fopen(identity_file, "r")) == NULL) 1948 fatal("fopen %s: %s", identity_file, strerror(errno)); 1949 1950 while (read_keyfile_line(f, path, line, sizeof(line), &lnum) == 0) { 1951 sshkey_free(key); 1952 key = NULL; 1953 /* Trim leading space and comments */ 1954 cp = line + strspn(line, " \t"); 1955 if (*cp == '#' || *cp == '\0') 1956 continue; 1957 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 1958 fatal("key_new"); 1959 if ((r = sshkey_read(key, &cp)) != 0) { 1960 error("%s:%lu: invalid key: %s", path, 1961 lnum, ssh_err(r)); 1962 continue; 1963 } 1964 if (!sshkey_is_cert(key)) { 1965 error("%s:%lu is not a certificate", path, lnum); 1966 continue; 1967 } 1968 ok = 1; 1969 if (!is_stdin && lnum == 1) 1970 printf("%s:\n", path); 1971 else 1972 printf("%s:%lu:\n", path, lnum); 1973 print_cert(key); 1974 } 1975 sshkey_free(key); 1976 fclose(f); 1977 exit(ok ? 0 : 1); 1978 } 1979 1980 static void 1981 load_krl(const char *path, struct ssh_krl **krlp) 1982 { 1983 struct sshbuf *krlbuf; 1984 int r, fd; 1985 1986 if ((krlbuf = sshbuf_new()) == NULL) 1987 fatal("sshbuf_new failed"); 1988 if ((fd = open(path, O_RDONLY)) == -1) 1989 fatal("open %s: %s", path, strerror(errno)); 1990 if ((r = sshkey_load_file(fd, krlbuf)) != 0) 1991 fatal("Unable to load KRL: %s", ssh_err(r)); 1992 close(fd); 1993 /* XXX check sigs */ 1994 if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 || 1995 *krlp == NULL) 1996 fatal("Invalid KRL file: %s", ssh_err(r)); 1997 sshbuf_free(krlbuf); 1998 } 1999 2000 static void 2001 update_krl_from_file(struct passwd *pw, const char *file, int wild_ca, 2002 const struct sshkey *ca, struct ssh_krl *krl) 2003 { 2004 struct sshkey *key = NULL; 2005 u_long lnum = 0; 2006 char *path, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES]; 2007 unsigned long long serial, serial2; 2008 int i, was_explicit_key, was_sha1, r; 2009 FILE *krl_spec; 2010 2011 path = tilde_expand_filename(file, pw->pw_uid); 2012 if (strcmp(path, "-") == 0) { 2013 krl_spec = stdin; 2014 free(path); 2015 path = xstrdup("(standard input)"); 2016 } else if ((krl_spec = fopen(path, "r")) == NULL) 2017 fatal("fopen %s: %s", path, strerror(errno)); 2018 2019 if (!quiet) 2020 printf("Revoking from %s\n", path); 2021 while (read_keyfile_line(krl_spec, path, line, sizeof(line), 2022 &lnum) == 0) { 2023 was_explicit_key = was_sha1 = 0; 2024 cp = line + strspn(line, " \t"); 2025 /* Trim trailing space, comments and strip \n */ 2026 for (i = 0, r = -1; cp[i] != '\0'; i++) { 2027 if (cp[i] == '#' || cp[i] == '\n') { 2028 cp[i] = '\0'; 2029 break; 2030 } 2031 if (cp[i] == ' ' || cp[i] == '\t') { 2032 /* Remember the start of a span of whitespace */ 2033 if (r == -1) 2034 r = i; 2035 } else 2036 r = -1; 2037 } 2038 if (r != -1) 2039 cp[r] = '\0'; 2040 if (*cp == '\0') 2041 continue; 2042 if (strncasecmp(cp, "serial:", 7) == 0) { 2043 if (ca == NULL && !wild_ca) { 2044 fatal("revoking certificates by serial number " 2045 "requires specification of a CA key"); 2046 } 2047 cp += 7; 2048 cp = cp + strspn(cp, " \t"); 2049 errno = 0; 2050 serial = strtoull(cp, &ep, 0); 2051 if (*cp == '\0' || (*ep != '\0' && *ep != '-')) 2052 fatal("%s:%lu: invalid serial \"%s\"", 2053 path, lnum, cp); 2054 if (errno == ERANGE && serial == ULLONG_MAX) 2055 fatal("%s:%lu: serial out of range", 2056 path, lnum); 2057 serial2 = serial; 2058 if (*ep == '-') { 2059 cp = ep + 1; 2060 errno = 0; 2061 serial2 = strtoull(cp, &ep, 0); 2062 if (*cp == '\0' || *ep != '\0') 2063 fatal("%s:%lu: invalid serial \"%s\"", 2064 path, lnum, cp); 2065 if (errno == ERANGE && serial2 == ULLONG_MAX) 2066 fatal("%s:%lu: serial out of range", 2067 path, lnum); 2068 if (serial2 <= serial) 2069 fatal("%s:%lu: invalid serial range " 2070 "%llu:%llu", path, lnum, 2071 (unsigned long long)serial, 2072 (unsigned long long)serial2); 2073 } 2074 if (ssh_krl_revoke_cert_by_serial_range(krl, 2075 ca, serial, serial2) != 0) { 2076 fatal("%s: revoke serial failed", 2077 __func__); 2078 } 2079 } else if (strncasecmp(cp, "id:", 3) == 0) { 2080 if (ca == NULL && !wild_ca) { 2081 fatal("revoking certificates by key ID " 2082 "requires specification of a CA key"); 2083 } 2084 cp += 3; 2085 cp = cp + strspn(cp, " \t"); 2086 if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0) 2087 fatal("%s: revoke key ID failed", __func__); 2088 } else { 2089 if (strncasecmp(cp, "key:", 4) == 0) { 2090 cp += 4; 2091 cp = cp + strspn(cp, " \t"); 2092 was_explicit_key = 1; 2093 } else if (strncasecmp(cp, "sha1:", 5) == 0) { 2094 cp += 5; 2095 cp = cp + strspn(cp, " \t"); 2096 was_sha1 = 1; 2097 } else { 2098 /* 2099 * Just try to process the line as a key. 2100 * Parsing will fail if it isn't. 2101 */ 2102 } 2103 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 2104 fatal("key_new"); 2105 if ((r = sshkey_read(key, &cp)) != 0) 2106 fatal("%s:%lu: invalid key: %s", 2107 path, lnum, ssh_err(r)); 2108 if (was_explicit_key) 2109 r = ssh_krl_revoke_key_explicit(krl, key); 2110 else if (was_sha1) 2111 r = ssh_krl_revoke_key_sha1(krl, key); 2112 else 2113 r = ssh_krl_revoke_key(krl, key); 2114 if (r != 0) 2115 fatal("%s: revoke key failed: %s", 2116 __func__, ssh_err(r)); 2117 sshkey_free(key); 2118 } 2119 } 2120 if (strcmp(path, "-") != 0) 2121 fclose(krl_spec); 2122 free(path); 2123 } 2124 2125 static void 2126 do_gen_krl(struct passwd *pw, int updating, int argc, char **argv) 2127 { 2128 struct ssh_krl *krl; 2129 struct stat sb; 2130 struct sshkey *ca = NULL; 2131 int fd, i, r, wild_ca = 0; 2132 char *tmp; 2133 struct sshbuf *kbuf; 2134 2135 if (*identity_file == '\0') 2136 fatal("KRL generation requires an output file"); 2137 if (stat(identity_file, &sb) == -1) { 2138 if (errno != ENOENT) 2139 fatal("Cannot access KRL \"%s\": %s", 2140 identity_file, strerror(errno)); 2141 if (updating) 2142 fatal("KRL \"%s\" does not exist", identity_file); 2143 } 2144 if (ca_key_path != NULL) { 2145 if (strcasecmp(ca_key_path, "none") == 0) 2146 wild_ca = 1; 2147 else { 2148 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 2149 if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) 2150 fatal("Cannot load CA public key %s: %s", 2151 tmp, ssh_err(r)); 2152 free(tmp); 2153 } 2154 } 2155 2156 if (updating) 2157 load_krl(identity_file, &krl); 2158 else if ((krl = ssh_krl_init()) == NULL) 2159 fatal("couldn't create KRL"); 2160 2161 if (cert_serial != 0) 2162 ssh_krl_set_version(krl, cert_serial); 2163 if (identity_comment != NULL) 2164 ssh_krl_set_comment(krl, identity_comment); 2165 2166 for (i = 0; i < argc; i++) 2167 update_krl_from_file(pw, argv[i], wild_ca, ca, krl); 2168 2169 if ((kbuf = sshbuf_new()) == NULL) 2170 fatal("sshbuf_new failed"); 2171 if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0) 2172 fatal("Couldn't generate KRL"); 2173 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 2174 fatal("open %s: %s", identity_file, strerror(errno)); 2175 if (atomicio(vwrite, fd, (void *)sshbuf_ptr(kbuf), sshbuf_len(kbuf)) != 2176 sshbuf_len(kbuf)) 2177 fatal("write %s: %s", identity_file, strerror(errno)); 2178 close(fd); 2179 sshbuf_free(kbuf); 2180 ssh_krl_free(krl); 2181 sshkey_free(ca); 2182 } 2183 2184 static void 2185 do_check_krl(struct passwd *pw, int argc, char **argv) 2186 { 2187 int i, r, ret = 0; 2188 char *comment; 2189 struct ssh_krl *krl; 2190 struct sshkey *k; 2191 2192 if (*identity_file == '\0') 2193 fatal("KRL checking requires an input file"); 2194 load_krl(identity_file, &krl); 2195 for (i = 0; i < argc; i++) { 2196 if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0) 2197 fatal("Cannot load public key %s: %s", 2198 argv[i], ssh_err(r)); 2199 r = ssh_krl_check_key(krl, k); 2200 printf("%s%s%s%s: %s\n", argv[i], 2201 *comment ? " (" : "", comment, *comment ? ")" : "", 2202 r == 0 ? "ok" : "REVOKED"); 2203 if (r != 0) 2204 ret = 1; 2205 sshkey_free(k); 2206 free(comment); 2207 } 2208 ssh_krl_free(krl); 2209 exit(ret); 2210 } 2211 2212 #ifdef WITH_SSH1 2213 # define RSA1_USAGE " | rsa1" 2214 #else 2215 # define RSA1_USAGE "" 2216 #endif 2217 2218 static void 2219 usage(void) 2220 { 2221 fprintf(stderr, 2222 "usage: ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa%s]\n" 2223 " [-N new_passphrase] [-C comment] [-f output_keyfile]\n" 2224 " ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]\n" 2225 " ssh-keygen -i [-m key_format] [-f input_keyfile]\n" 2226 " ssh-keygen -e [-m key_format] [-f input_keyfile]\n" 2227 " ssh-keygen -y [-f input_keyfile]\n" 2228 " ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]\n" 2229 " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n" 2230 " ssh-keygen -B [-f input_keyfile]\n", RSA1_USAGE); 2231 #ifdef ENABLE_PKCS11 2232 fprintf(stderr, 2233 " ssh-keygen -D pkcs11\n"); 2234 #endif 2235 fprintf(stderr, 2236 " ssh-keygen -F hostname [-f known_hosts_file] [-l]\n" 2237 " ssh-keygen -H [-f known_hosts_file]\n" 2238 " ssh-keygen -R hostname [-f known_hosts_file]\n" 2239 " ssh-keygen -r hostname [-f input_keyfile] [-g]\n" 2240 #ifdef WITH_OPENSSL 2241 " ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n" 2242 " ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]\n" 2243 " [-j start_line] [-K checkpt] [-W generator]\n" 2244 #endif 2245 " ssh-keygen -s ca_key -I certificate_identity [-h] [-n principals]\n" 2246 " [-O option] [-V validity_interval] [-z serial_number] file ...\n" 2247 " ssh-keygen -L [-f input_keyfile]\n" 2248 " ssh-keygen -A\n" 2249 " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n" 2250 " file ...\n" 2251 " ssh-keygen -Q -f krl_file file ...\n"); 2252 exit(1); 2253 } 2254 2255 /* 2256 * Main program for key management. 2257 */ 2258 int 2259 main(int argc, char **argv) 2260 { 2261 char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2; 2262 char *rr_hostname = NULL, *ep, *fp, *ra; 2263 struct sshkey *private, *public; 2264 struct passwd *pw; 2265 struct stat st; 2266 int r, opt, type, fd; 2267 int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0; 2268 FILE *f; 2269 const char *errstr; 2270 #ifdef WITH_OPENSSL 2271 /* Moduli generation/screening */ 2272 char out_file[PATH_MAX], *checkpoint = NULL; 2273 u_int32_t memory = 0, generator_wanted = 0; 2274 int do_gen_candidates = 0, do_screen_candidates = 0; 2275 unsigned long start_lineno = 0, lines_to_process = 0; 2276 BIGNUM *start = NULL; 2277 #endif 2278 2279 extern int optind; 2280 extern char *optarg; 2281 2282 ssh_malloc_init(); /* must be called before any mallocs */ 2283 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 2284 sanitise_stdfd(); 2285 2286 __progname = ssh_get_progname(argv[0]); 2287 2288 #ifdef WITH_OPENSSL 2289 OpenSSL_add_all_algorithms(); 2290 #endif 2291 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); 2292 2293 seed_rng(); 2294 2295 msetlocale(); 2296 2297 /* we need this for the home * directory. */ 2298 pw = getpwuid(getuid()); 2299 if (!pw) 2300 fatal("No user exists for uid %lu", (u_long)getuid()); 2301 if (gethostname(hostname, sizeof(hostname)) < 0) 2302 fatal("gethostname: %s", strerror(errno)); 2303 2304 /* Remaining characters: UYdw */ 2305 while ((opt = getopt(argc, argv, "ABHLQXceghiklopquvxy" 2306 "C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Z:" 2307 "a:b:f:g:j:m:n:r:s:t:z:")) != -1) { 2308 switch (opt) { 2309 case 'A': 2310 gen_all_hostkeys = 1; 2311 break; 2312 case 'b': 2313 bits = (u_int32_t)strtonum(optarg, 256, 32768, &errstr); 2314 if (errstr) 2315 fatal("Bits has bad value %s (%s)", 2316 optarg, errstr); 2317 break; 2318 case 'E': 2319 fingerprint_hash = ssh_digest_alg_by_name(optarg); 2320 if (fingerprint_hash == -1) 2321 fatal("Invalid hash algorithm \"%s\"", optarg); 2322 break; 2323 case 'F': 2324 find_host = 1; 2325 rr_hostname = optarg; 2326 break; 2327 case 'H': 2328 hash_hosts = 1; 2329 break; 2330 case 'I': 2331 cert_key_id = optarg; 2332 break; 2333 case 'R': 2334 delete_host = 1; 2335 rr_hostname = optarg; 2336 break; 2337 case 'L': 2338 show_cert = 1; 2339 break; 2340 case 'l': 2341 print_fingerprint = 1; 2342 break; 2343 case 'B': 2344 print_bubblebabble = 1; 2345 break; 2346 case 'm': 2347 if (strcasecmp(optarg, "RFC4716") == 0 || 2348 strcasecmp(optarg, "ssh2") == 0) { 2349 convert_format = FMT_RFC4716; 2350 break; 2351 } 2352 if (strcasecmp(optarg, "PKCS8") == 0) { 2353 convert_format = FMT_PKCS8; 2354 break; 2355 } 2356 if (strcasecmp(optarg, "PEM") == 0) { 2357 convert_format = FMT_PEM; 2358 break; 2359 } 2360 fatal("Unsupported conversion format \"%s\"", optarg); 2361 case 'n': 2362 cert_principals = optarg; 2363 break; 2364 case 'o': 2365 use_new_format = 1; 2366 break; 2367 case 'p': 2368 change_passphrase = 1; 2369 break; 2370 case 'c': 2371 change_comment = 1; 2372 break; 2373 case 'f': 2374 if (strlcpy(identity_file, optarg, 2375 sizeof(identity_file)) >= sizeof(identity_file)) 2376 fatal("Identity filename too long"); 2377 have_identity = 1; 2378 break; 2379 case 'g': 2380 print_generic = 1; 2381 break; 2382 case 'P': 2383 identity_passphrase = optarg; 2384 break; 2385 case 'N': 2386 identity_new_passphrase = optarg; 2387 break; 2388 case 'Q': 2389 check_krl = 1; 2390 break; 2391 case 'O': 2392 add_cert_option(optarg); 2393 break; 2394 case 'Z': 2395 new_format_cipher = optarg; 2396 break; 2397 case 'C': 2398 identity_comment = optarg; 2399 break; 2400 case 'q': 2401 quiet = 1; 2402 break; 2403 case 'e': 2404 case 'x': 2405 /* export key */ 2406 convert_to = 1; 2407 break; 2408 case 'h': 2409 cert_key_type = SSH2_CERT_TYPE_HOST; 2410 certflags_flags = 0; 2411 break; 2412 case 'k': 2413 gen_krl = 1; 2414 break; 2415 case 'i': 2416 case 'X': 2417 /* import key */ 2418 convert_from = 1; 2419 break; 2420 case 'y': 2421 print_public = 1; 2422 break; 2423 case 's': 2424 ca_key_path = optarg; 2425 break; 2426 case 't': 2427 key_type_name = optarg; 2428 break; 2429 case 'D': 2430 pkcs11provider = optarg; 2431 break; 2432 case 'u': 2433 update_krl = 1; 2434 break; 2435 case 'v': 2436 if (log_level == SYSLOG_LEVEL_INFO) 2437 log_level = SYSLOG_LEVEL_DEBUG1; 2438 else { 2439 if (log_level >= SYSLOG_LEVEL_DEBUG1 && 2440 log_level < SYSLOG_LEVEL_DEBUG3) 2441 log_level++; 2442 } 2443 break; 2444 case 'r': 2445 rr_hostname = optarg; 2446 break; 2447 case 'a': 2448 rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr); 2449 if (errstr) 2450 fatal("Invalid number: %s (%s)", 2451 optarg, errstr); 2452 break; 2453 case 'V': 2454 parse_cert_times(optarg); 2455 break; 2456 case 'z': 2457 errno = 0; 2458 cert_serial = strtoull(optarg, &ep, 10); 2459 if (*optarg < '0' || *optarg > '9' || *ep != '\0' || 2460 (errno == ERANGE && cert_serial == ULLONG_MAX)) 2461 fatal("Invalid serial number \"%s\"", optarg); 2462 break; 2463 #ifdef WITH_OPENSSL 2464 /* Moduli generation/screening */ 2465 case 'G': 2466 do_gen_candidates = 1; 2467 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 2468 sizeof(out_file)) 2469 fatal("Output filename too long"); 2470 break; 2471 case 'J': 2472 lines_to_process = strtoul(optarg, NULL, 10); 2473 break; 2474 case 'j': 2475 start_lineno = strtoul(optarg, NULL, 10); 2476 break; 2477 case 'K': 2478 if (strlen(optarg) >= PATH_MAX) 2479 fatal("Checkpoint filename too long"); 2480 checkpoint = xstrdup(optarg); 2481 break; 2482 case 'M': 2483 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, 2484 &errstr); 2485 if (errstr) 2486 fatal("Memory limit is %s: %s", errstr, optarg); 2487 break; 2488 case 'S': 2489 /* XXX - also compare length against bits */ 2490 if (BN_hex2bn(&start, optarg) == 0) 2491 fatal("Invalid start point."); 2492 break; 2493 case 'T': 2494 do_screen_candidates = 1; 2495 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 2496 sizeof(out_file)) 2497 fatal("Output filename too long"); 2498 break; 2499 case 'W': 2500 generator_wanted = (u_int32_t)strtonum(optarg, 1, 2501 UINT_MAX, &errstr); 2502 if (errstr != NULL) 2503 fatal("Desired generator invalid: %s (%s)", 2504 optarg, errstr); 2505 break; 2506 #endif /* WITH_OPENSSL */ 2507 case '?': 2508 default: 2509 usage(); 2510 } 2511 } 2512 2513 /* reinit */ 2514 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); 2515 2516 argv += optind; 2517 argc -= optind; 2518 2519 if (ca_key_path != NULL) { 2520 if (argc < 1 && !gen_krl) { 2521 error("Too few arguments."); 2522 usage(); 2523 } 2524 } else if (argc > 0 && !gen_krl && !check_krl) { 2525 error("Too many arguments."); 2526 usage(); 2527 } 2528 if (change_passphrase && change_comment) { 2529 error("Can only have one of -p and -c."); 2530 usage(); 2531 } 2532 if (print_fingerprint && (delete_host || hash_hosts)) { 2533 error("Cannot use -l with -H or -R."); 2534 usage(); 2535 } 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 if (ca_key_path != NULL) { 2545 if (cert_key_id == NULL) 2546 fatal("Must specify key id (-I) when certifying"); 2547 do_ca_sign(pw, argc, argv); 2548 } 2549 if (show_cert) 2550 do_show_cert(pw); 2551 if (delete_host || hash_hosts || find_host) 2552 do_known_hosts(pw, rr_hostname); 2553 if (pkcs11provider != NULL) 2554 do_download(pw); 2555 if (print_fingerprint || print_bubblebabble) 2556 do_fingerprint(pw); 2557 if (change_passphrase) 2558 do_change_passphrase(pw); 2559 if (change_comment) 2560 do_change_comment(pw); 2561 #ifdef WITH_OPENSSL 2562 if (convert_to) 2563 do_convert_to(pw); 2564 if (convert_from) 2565 do_convert_from(pw); 2566 #endif 2567 if (print_public) 2568 do_print_public(pw); 2569 if (rr_hostname != NULL) { 2570 unsigned int n = 0; 2571 2572 if (have_identity) { 2573 n = do_print_resource_record(pw, 2574 identity_file, rr_hostname); 2575 if (n == 0) 2576 fatal("%s: %s", identity_file, strerror(errno)); 2577 exit(0); 2578 } else { 2579 2580 n += do_print_resource_record(pw, 2581 _PATH_HOST_RSA_KEY_FILE, rr_hostname); 2582 n += do_print_resource_record(pw, 2583 _PATH_HOST_DSA_KEY_FILE, rr_hostname); 2584 n += do_print_resource_record(pw, 2585 _PATH_HOST_ECDSA_KEY_FILE, rr_hostname); 2586 n += do_print_resource_record(pw, 2587 _PATH_HOST_ED25519_KEY_FILE, rr_hostname); 2588 if (n == 0) 2589 fatal("no keys found."); 2590 exit(0); 2591 } 2592 } 2593 2594 #ifdef WITH_OPENSSL 2595 if (do_gen_candidates) { 2596 FILE *out = fopen(out_file, "w"); 2597 2598 if (out == NULL) { 2599 error("Couldn't open modulus candidate file \"%s\": %s", 2600 out_file, strerror(errno)); 2601 return (1); 2602 } 2603 if (bits == 0) 2604 bits = DEFAULT_BITS; 2605 if (gen_candidates(out, memory, bits, start) != 0) 2606 fatal("modulus candidate generation failed"); 2607 2608 return (0); 2609 } 2610 2611 if (do_screen_candidates) { 2612 FILE *in; 2613 FILE *out = fopen(out_file, "a"); 2614 2615 if (have_identity && strcmp(identity_file, "-") != 0) { 2616 if ((in = fopen(identity_file, "r")) == NULL) { 2617 fatal("Couldn't open modulus candidate " 2618 "file \"%s\": %s", identity_file, 2619 strerror(errno)); 2620 } 2621 } else 2622 in = stdin; 2623 2624 if (out == NULL) { 2625 fatal("Couldn't open moduli file \"%s\": %s", 2626 out_file, strerror(errno)); 2627 } 2628 if (prime_test(in, out, rounds == 0 ? 100 : rounds, 2629 generator_wanted, checkpoint, 2630 start_lineno, lines_to_process) != 0) 2631 fatal("modulus screening failed"); 2632 return (0); 2633 } 2634 #endif 2635 2636 if (gen_all_hostkeys) { 2637 do_gen_all_hostkeys(pw); 2638 return (0); 2639 } 2640 2641 if (key_type_name == NULL) 2642 key_type_name = DEFAULT_KEY_TYPE_NAME; 2643 2644 type = sshkey_type_from_name(key_type_name); 2645 type_bits_valid(type, key_type_name, &bits); 2646 2647 if (!quiet) 2648 printf("Generating public/private %s key pair.\n", 2649 key_type_name); 2650 if ((r = sshkey_generate(type, bits, &private)) != 0) 2651 fatal("key_generate failed"); 2652 if ((r = sshkey_from_private(private, &public)) != 0) 2653 fatal("key_from_private failed: %s\n", ssh_err(r)); 2654 2655 if (!have_identity) 2656 ask_filename(pw, "Enter file in which to save the key"); 2657 2658 /* Create ~/.ssh directory if it doesn't already exist. */ 2659 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", 2660 pw->pw_dir, _PATH_SSH_USER_DIR); 2661 if (strstr(identity_file, dotsshdir) != NULL) { 2662 if (stat(dotsshdir, &st) < 0) { 2663 if (errno != ENOENT) { 2664 error("Could not stat %s: %s", dotsshdir, 2665 strerror(errno)); 2666 } else if (mkdir(dotsshdir, 0700) < 0) { 2667 error("Could not create directory '%s': %s", 2668 dotsshdir, strerror(errno)); 2669 } else if (!quiet) 2670 printf("Created directory '%s'.\n", dotsshdir); 2671 } 2672 } 2673 /* If the file already exists, ask the user to confirm. */ 2674 if (stat(identity_file, &st) >= 0) { 2675 char yesno[3]; 2676 printf("%s already exists.\n", identity_file); 2677 printf("Overwrite (y/n)? "); 2678 fflush(stdout); 2679 if (fgets(yesno, sizeof(yesno), stdin) == NULL) 2680 exit(1); 2681 if (yesno[0] != 'y' && yesno[0] != 'Y') 2682 exit(1); 2683 } 2684 /* Ask for a passphrase (twice). */ 2685 if (identity_passphrase) 2686 passphrase1 = xstrdup(identity_passphrase); 2687 else if (identity_new_passphrase) 2688 passphrase1 = xstrdup(identity_new_passphrase); 2689 else { 2690 passphrase_again: 2691 passphrase1 = 2692 read_passphrase("Enter passphrase (empty for no " 2693 "passphrase): ", RP_ALLOW_STDIN); 2694 passphrase2 = read_passphrase("Enter same passphrase again: ", 2695 RP_ALLOW_STDIN); 2696 if (strcmp(passphrase1, passphrase2) != 0) { 2697 /* 2698 * The passphrases do not match. Clear them and 2699 * retry. 2700 */ 2701 explicit_bzero(passphrase1, strlen(passphrase1)); 2702 explicit_bzero(passphrase2, strlen(passphrase2)); 2703 free(passphrase1); 2704 free(passphrase2); 2705 printf("Passphrases do not match. Try again.\n"); 2706 goto passphrase_again; 2707 } 2708 /* Clear the other copy of the passphrase. */ 2709 explicit_bzero(passphrase2, strlen(passphrase2)); 2710 free(passphrase2); 2711 } 2712 2713 if (identity_comment) { 2714 strlcpy(comment, identity_comment, sizeof(comment)); 2715 } else { 2716 /* Create default comment field for the passphrase. */ 2717 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); 2718 } 2719 2720 /* Save the key with the given passphrase and comment. */ 2721 if ((r = sshkey_save_private(private, identity_file, passphrase1, 2722 comment, use_new_format, new_format_cipher, rounds)) != 0) { 2723 error("Saving key \"%s\" failed: %s", 2724 identity_file, ssh_err(r)); 2725 explicit_bzero(passphrase1, strlen(passphrase1)); 2726 free(passphrase1); 2727 exit(1); 2728 } 2729 /* Clear the passphrase. */ 2730 explicit_bzero(passphrase1, strlen(passphrase1)); 2731 free(passphrase1); 2732 2733 /* Clear the private key and the random number generator. */ 2734 sshkey_free(private); 2735 2736 if (!quiet) 2737 printf("Your identification has been saved in %s.\n", identity_file); 2738 2739 strlcat(identity_file, ".pub", sizeof(identity_file)); 2740 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 2741 fatal("Unable to save public key to %s: %s", 2742 identity_file, strerror(errno)); 2743 if ((f = fdopen(fd, "w")) == NULL) 2744 fatal("fdopen %s failed: %s", identity_file, strerror(errno)); 2745 if ((r = sshkey_write(public, f)) != 0) 2746 error("write key failed: %s", ssh_err(r)); 2747 fprintf(f, " %s\n", comment); 2748 fclose(f); 2749 2750 if (!quiet) { 2751 fp = sshkey_fingerprint(public, fingerprint_hash, 2752 SSH_FP_DEFAULT); 2753 ra = sshkey_fingerprint(public, fingerprint_hash, 2754 SSH_FP_RANDOMART); 2755 if (fp == NULL || ra == NULL) 2756 fatal("sshkey_fingerprint failed"); 2757 printf("Your public key has been saved in %s.\n", 2758 identity_file); 2759 printf("The key fingerprint is:\n"); 2760 printf("%s %s\n", fp, comment); 2761 printf("The key's randomart image is:\n"); 2762 printf("%s\n", ra); 2763 free(ra); 2764 free(fp); 2765 } 2766 2767 sshkey_free(public); 2768 exit(0); 2769 } 2770
