1 /* $OpenBSD: ssh-keygen.c,v 1.437 2021/09/08 03:23:44 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 #ifdef HAVE_STDINT_H 28 # include <stdint.h> 29 #endif 30 #include <errno.h> 31 #include <fcntl.h> 32 #include <netdb.h> 33 #ifdef HAVE_PATHS_H 34 # include <paths.h> 35 #endif 36 #include <pwd.h> 37 #include <stdarg.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include <limits.h> 43 #include <locale.h> 44 #include <time.h> 45 46 #include "xmalloc.h" 47 #include "sshkey.h" 48 #include "authfile.h" 49 #include "sshbuf.h" 50 #include "pathnames.h" 51 #include "log.h" 52 #include "misc.h" 53 #include "match.h" 54 #include "hostfile.h" 55 #include "dns.h" 56 #include "ssh.h" 57 #include "ssh2.h" 58 #include "ssherr.h" 59 #include "ssh-pkcs11.h" 60 #include "atomicio.h" 61 #include "krl.h" 62 #include "digest.h" 63 #include "utf8.h" 64 #include "authfd.h" 65 #include "sshsig.h" 66 #include "ssh-sk.h" 67 #include "sk-api.h" /* XXX for SSH_SK_USER_PRESENCE_REQD; remove */ 68 #include "cipher.h" 69 70 #ifdef WITH_OPENSSL 71 # define DEFAULT_KEY_TYPE_NAME "rsa" 72 #else 73 # define DEFAULT_KEY_TYPE_NAME "ed25519" 74 #endif 75 76 /* 77 * Default number of bits in the RSA, DSA and ECDSA keys. These value can be 78 * overridden on the command line. 79 * 80 * These values, with the exception of DSA, provide security equivalent to at 81 * least 128 bits of security according to NIST Special Publication 800-57: 82 * Recommendation for Key Management Part 1 rev 4 section 5.6.1. 83 * For DSA it (and FIPS-186-4 section 4.2) specifies that the only size for 84 * which a 160bit hash is acceptable is 1kbit, and since ssh-dss specifies only 85 * SHA1 we limit the DSA key size 1k bits. 86 */ 87 #define DEFAULT_BITS 3072 88 #define DEFAULT_BITS_DSA 1024 89 #define DEFAULT_BITS_ECDSA 256 90 91 static int quiet = 0; 92 93 /* Flag indicating that we just want to see the key fingerprint */ 94 static int print_fingerprint = 0; 95 static int print_bubblebabble = 0; 96 97 /* Hash algorithm to use for fingerprints. */ 98 static int fingerprint_hash = SSH_FP_HASH_DEFAULT; 99 100 /* The identity file name, given on the command line or entered by the user. */ 101 static char identity_file[PATH_MAX]; 102 static int have_identity = 0; 103 104 /* This is set to the passphrase if given on the command line. */ 105 static char *identity_passphrase = NULL; 106 107 /* This is set to the new passphrase if given on the command line. */ 108 static char *identity_new_passphrase = NULL; 109 110 /* Key type when certifying */ 111 static u_int cert_key_type = SSH2_CERT_TYPE_USER; 112 113 /* "key ID" of signed key */ 114 static char *cert_key_id = NULL; 115 116 /* Comma-separated list of principal names for certifying keys */ 117 static char *cert_principals = NULL; 118 119 /* Validity period for certificates */ 120 static u_int64_t cert_valid_from = 0; 121 static u_int64_t cert_valid_to = ~0ULL; 122 123 /* Certificate options */ 124 #define CERTOPT_X_FWD (1) 125 #define CERTOPT_AGENT_FWD (1<<1) 126 #define CERTOPT_PORT_FWD (1<<2) 127 #define CERTOPT_PTY (1<<3) 128 #define CERTOPT_USER_RC (1<<4) 129 #define CERTOPT_NO_REQUIRE_USER_PRESENCE (1<<5) 130 #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \ 131 CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC) 132 static u_int32_t certflags_flags = CERTOPT_DEFAULT; 133 static char *certflags_command = NULL; 134 static char *certflags_src_addr = NULL; 135 136 /* Arbitrary extensions specified by user */ 137 struct cert_ext { 138 char *key; 139 char *val; 140 int crit; 141 }; 142 static struct cert_ext *cert_ext; 143 static size_t ncert_ext; 144 145 /* Conversion to/from various formats */ 146 enum { 147 FMT_RFC4716, 148 FMT_PKCS8, 149 FMT_PEM 150 } convert_format = FMT_RFC4716; 151 152 static char *key_type_name = NULL; 153 154 /* Load key from this PKCS#11 provider */ 155 static char *pkcs11provider = NULL; 156 157 /* FIDO/U2F provider to use */ 158 static char *sk_provider = NULL; 159 160 /* Format for writing private keys */ 161 static int private_key_format = SSHKEY_PRIVATE_OPENSSH; 162 163 /* Cipher for new-format private keys */ 164 static char *openssh_format_cipher = NULL; 165 166 /* Number of KDF rounds to derive new format keys. */ 167 static int rounds = 0; 168 169 /* argv0 */ 170 extern char *__progname; 171 172 static char hostname[NI_MAXHOST]; 173 174 #ifdef WITH_OPENSSL 175 /* moduli.c */ 176 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); 177 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long, 178 unsigned long); 179 #endif 180 181 static void 182 type_bits_valid(int type, const char *name, u_int32_t *bitsp) 183 { 184 if (type == KEY_UNSPEC) 185 fatal("unknown key type %s", key_type_name); 186 if (*bitsp == 0) { 187 #ifdef WITH_OPENSSL 188 int nid; 189 190 switch(type) { 191 case KEY_DSA: 192 *bitsp = DEFAULT_BITS_DSA; 193 break; 194 case KEY_ECDSA: 195 if (name != NULL && 196 (nid = sshkey_ecdsa_nid_from_name(name)) > 0) 197 *bitsp = sshkey_curve_nid_to_bits(nid); 198 if (*bitsp == 0) 199 *bitsp = DEFAULT_BITS_ECDSA; 200 break; 201 case KEY_RSA: 202 *bitsp = DEFAULT_BITS; 203 break; 204 } 205 #endif 206 } 207 #ifdef WITH_OPENSSL 208 switch (type) { 209 case KEY_DSA: 210 if (*bitsp != 1024) 211 fatal("Invalid DSA key length: must be 1024 bits"); 212 break; 213 case KEY_RSA: 214 if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE) 215 fatal("Invalid RSA key length: minimum is %d bits", 216 SSH_RSA_MINIMUM_MODULUS_SIZE); 217 else if (*bitsp > OPENSSL_RSA_MAX_MODULUS_BITS) 218 fatal("Invalid RSA key length: maximum is %d bits", 219 OPENSSL_RSA_MAX_MODULUS_BITS); 220 break; 221 case KEY_ECDSA: 222 if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1) 223 #ifdef OPENSSL_HAS_NISTP521 224 fatal("Invalid ECDSA key length: valid lengths are " 225 "256, 384 or 521 bits"); 226 #else 227 fatal("Invalid ECDSA key length: valid lengths are " 228 "256 or 384 bits"); 229 #endif 230 } 231 #endif 232 } 233 234 /* 235 * Checks whether a file exists and, if so, asks the user whether they wish 236 * to overwrite it. 237 * Returns nonzero if the file does not already exist or if the user agrees to 238 * overwrite, or zero otherwise. 239 */ 240 static int 241 confirm_overwrite(const char *filename) 242 { 243 char yesno[3]; 244 struct stat st; 245 246 if (stat(filename, &st) != 0) 247 return 1; 248 printf("%s already exists.\n", filename); 249 printf("Overwrite (y/n)? "); 250 fflush(stdout); 251 if (fgets(yesno, sizeof(yesno), stdin) == NULL) 252 return 0; 253 if (yesno[0] != 'y' && yesno[0] != 'Y') 254 return 0; 255 return 1; 256 } 257 258 static void 259 ask_filename(struct passwd *pw, const char *prompt) 260 { 261 char buf[1024]; 262 char *name = NULL; 263 264 if (key_type_name == NULL) 265 name = _PATH_SSH_CLIENT_ID_RSA; 266 else { 267 switch (sshkey_type_from_name(key_type_name)) { 268 case KEY_DSA_CERT: 269 case KEY_DSA: 270 name = _PATH_SSH_CLIENT_ID_DSA; 271 break; 272 #ifdef OPENSSL_HAS_ECC 273 case KEY_ECDSA_CERT: 274 case KEY_ECDSA: 275 name = _PATH_SSH_CLIENT_ID_ECDSA; 276 break; 277 case KEY_ECDSA_SK_CERT: 278 case KEY_ECDSA_SK: 279 name = _PATH_SSH_CLIENT_ID_ECDSA_SK; 280 break; 281 #endif 282 case KEY_RSA_CERT: 283 case KEY_RSA: 284 name = _PATH_SSH_CLIENT_ID_RSA; 285 break; 286 case KEY_ED25519: 287 case KEY_ED25519_CERT: 288 name = _PATH_SSH_CLIENT_ID_ED25519; 289 break; 290 case KEY_ED25519_SK: 291 case KEY_ED25519_SK_CERT: 292 name = _PATH_SSH_CLIENT_ID_ED25519_SK; 293 break; 294 case KEY_XMSS: 295 case KEY_XMSS_CERT: 296 name = _PATH_SSH_CLIENT_ID_XMSS; 297 break; 298 default: 299 fatal("bad key type"); 300 } 301 } 302 snprintf(identity_file, sizeof(identity_file), 303 "%s/%s", pw->pw_dir, name); 304 printf("%s (%s): ", prompt, identity_file); 305 fflush(stdout); 306 if (fgets(buf, sizeof(buf), stdin) == NULL) 307 exit(1); 308 buf[strcspn(buf, "\n")] = '\0'; 309 if (strcmp(buf, "") != 0) 310 strlcpy(identity_file, buf, sizeof(identity_file)); 311 have_identity = 1; 312 } 313 314 static struct sshkey * 315 load_identity(const char *filename, char **commentp) 316 { 317 char *pass; 318 struct sshkey *prv; 319 int r; 320 321 if (commentp != NULL) 322 *commentp = NULL; 323 if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0) 324 return prv; 325 if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 326 fatal_r(r, "Load key \"%s\"", filename); 327 if (identity_passphrase) 328 pass = xstrdup(identity_passphrase); 329 else 330 pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN); 331 r = sshkey_load_private(filename, pass, &prv, commentp); 332 freezero(pass, strlen(pass)); 333 if (r != 0) 334 fatal_r(r, "Load key \"%s\"", filename); 335 return prv; 336 } 337 338 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" 339 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" 340 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" 341 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb 342 343 #ifdef WITH_OPENSSL 344 static void 345 do_convert_to_ssh2(struct passwd *pw, struct sshkey *k) 346 { 347 struct sshbuf *b; 348 char comment[61], *b64; 349 int r; 350 351 if ((b = sshbuf_new()) == NULL) 352 fatal_f("sshbuf_new failed"); 353 if ((r = sshkey_putb(k, b)) != 0) 354 fatal_fr(r, "put key"); 355 if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL) 356 fatal_f("sshbuf_dtob64_string failed"); 357 358 /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */ 359 snprintf(comment, sizeof(comment), 360 "%u-bit %s, converted by %s@%s from OpenSSH", 361 sshkey_size(k), sshkey_type(k), 362 pw->pw_name, hostname); 363 364 sshkey_free(k); 365 sshbuf_free(b); 366 367 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); 368 fprintf(stdout, "Comment: \"%s\"\n%s", comment, b64); 369 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); 370 free(b64); 371 exit(0); 372 } 373 374 static void 375 do_convert_to_pkcs8(struct sshkey *k) 376 { 377 switch (sshkey_type_plain(k->type)) { 378 case KEY_RSA: 379 if (!PEM_write_RSA_PUBKEY(stdout, k->rsa)) 380 fatal("PEM_write_RSA_PUBKEY failed"); 381 break; 382 case KEY_DSA: 383 if (!PEM_write_DSA_PUBKEY(stdout, k->dsa)) 384 fatal("PEM_write_DSA_PUBKEY failed"); 385 break; 386 #ifdef OPENSSL_HAS_ECC 387 case KEY_ECDSA: 388 if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa)) 389 fatal("PEM_write_EC_PUBKEY failed"); 390 break; 391 #endif 392 default: 393 fatal_f("unsupported key type %s", sshkey_type(k)); 394 } 395 exit(0); 396 } 397 398 static void 399 do_convert_to_pem(struct sshkey *k) 400 { 401 switch (sshkey_type_plain(k->type)) { 402 case KEY_RSA: 403 if (!PEM_write_RSAPublicKey(stdout, k->rsa)) 404 fatal("PEM_write_RSAPublicKey failed"); 405 break; 406 case KEY_DSA: 407 if (!PEM_write_DSA_PUBKEY(stdout, k->dsa)) 408 fatal("PEM_write_DSA_PUBKEY failed"); 409 break; 410 #ifdef OPENSSL_HAS_ECC 411 case KEY_ECDSA: 412 if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa)) 413 fatal("PEM_write_EC_PUBKEY failed"); 414 break; 415 #endif 416 default: 417 fatal_f("unsupported key type %s", sshkey_type(k)); 418 } 419 exit(0); 420 } 421 422 static void 423 do_convert_to(struct passwd *pw) 424 { 425 struct sshkey *k; 426 struct stat st; 427 int r; 428 429 if (!have_identity) 430 ask_filename(pw, "Enter file in which the key is"); 431 if (stat(identity_file, &st) == -1) 432 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 433 if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0) 434 k = load_identity(identity_file, NULL); 435 switch (convert_format) { 436 case FMT_RFC4716: 437 do_convert_to_ssh2(pw, k); 438 break; 439 case FMT_PKCS8: 440 do_convert_to_pkcs8(k); 441 break; 442 case FMT_PEM: 443 do_convert_to_pem(k); 444 break; 445 default: 446 fatal_f("unknown key format %d", convert_format); 447 } 448 exit(0); 449 } 450 451 /* 452 * This is almost exactly the bignum1 encoding, but with 32 bit for length 453 * instead of 16. 454 */ 455 static void 456 buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value) 457 { 458 u_int bytes, bignum_bits; 459 int r; 460 461 if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0) 462 fatal_fr(r, "parse"); 463 bytes = (bignum_bits + 7) / 8; 464 if (sshbuf_len(b) < bytes) 465 fatal_f("input buffer too small: need %d have %zu", 466 bytes, sshbuf_len(b)); 467 if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL) 468 fatal_f("BN_bin2bn failed"); 469 if ((r = sshbuf_consume(b, bytes)) != 0) 470 fatal_fr(r, "consume"); 471 } 472 473 static struct sshkey * 474 do_convert_private_ssh2(struct sshbuf *b) 475 { 476 struct sshkey *key = NULL; 477 char *type, *cipher; 478 u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345"; 479 int r, rlen, ktype; 480 u_int magic, i1, i2, i3, i4; 481 size_t slen; 482 u_long e; 483 BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL; 484 BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL; 485 BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL; 486 BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL; 487 488 if ((r = sshbuf_get_u32(b, &magic)) != 0) 489 fatal_fr(r, "parse magic"); 490 491 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { 492 error("bad magic 0x%x != 0x%x", magic, 493 SSH_COM_PRIVATE_KEY_MAGIC); 494 return NULL; 495 } 496 if ((r = sshbuf_get_u32(b, &i1)) != 0 || 497 (r = sshbuf_get_cstring(b, &type, NULL)) != 0 || 498 (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 || 499 (r = sshbuf_get_u32(b, &i2)) != 0 || 500 (r = sshbuf_get_u32(b, &i3)) != 0 || 501 (r = sshbuf_get_u32(b, &i4)) != 0) 502 fatal_fr(r, "parse"); 503 debug("ignore (%d %d %d %d)", i1, i2, i3, i4); 504 if (strcmp(cipher, "none") != 0) { 505 error("unsupported cipher %s", cipher); 506 free(cipher); 507 free(type); 508 return NULL; 509 } 510 free(cipher); 511 512 if (strstr(type, "dsa")) { 513 ktype = KEY_DSA; 514 } else if (strstr(type, "rsa")) { 515 ktype = KEY_RSA; 516 } else { 517 free(type); 518 return NULL; 519 } 520 if ((key = sshkey_new(ktype)) == NULL) 521 fatal("sshkey_new failed"); 522 free(type); 523 524 switch (key->type) { 525 case KEY_DSA: 526 if ((dsa_p = BN_new()) == NULL || 527 (dsa_q = BN_new()) == NULL || 528 (dsa_g = BN_new()) == NULL || 529 (dsa_pub_key = BN_new()) == NULL || 530 (dsa_priv_key = BN_new()) == NULL) 531 fatal_f("BN_new"); 532 buffer_get_bignum_bits(b, dsa_p); 533 buffer_get_bignum_bits(b, dsa_g); 534 buffer_get_bignum_bits(b, dsa_q); 535 buffer_get_bignum_bits(b, dsa_pub_key); 536 buffer_get_bignum_bits(b, dsa_priv_key); 537 if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g)) 538 fatal_f("DSA_set0_pqg failed"); 539 dsa_p = dsa_q = dsa_g = NULL; /* transferred */ 540 if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key)) 541 fatal_f("DSA_set0_key failed"); 542 dsa_pub_key = dsa_priv_key = NULL; /* transferred */ 543 break; 544 case KEY_RSA: 545 if ((r = sshbuf_get_u8(b, &e1)) != 0 || 546 (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) || 547 (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0)) 548 fatal_fr(r, "parse RSA"); 549 e = e1; 550 debug("e %lx", e); 551 if (e < 30) { 552 e <<= 8; 553 e += e2; 554 debug("e %lx", e); 555 e <<= 8; 556 e += e3; 557 debug("e %lx", e); 558 } 559 if ((rsa_e = BN_new()) == NULL) 560 fatal_f("BN_new"); 561 if (!BN_set_word(rsa_e, e)) { 562 BN_clear_free(rsa_e); 563 sshkey_free(key); 564 return NULL; 565 } 566 if ((rsa_n = BN_new()) == NULL || 567 (rsa_d = BN_new()) == NULL || 568 (rsa_p = BN_new()) == NULL || 569 (rsa_q = BN_new()) == NULL || 570 (rsa_iqmp = BN_new()) == NULL) 571 fatal_f("BN_new"); 572 buffer_get_bignum_bits(b, rsa_d); 573 buffer_get_bignum_bits(b, rsa_n); 574 buffer_get_bignum_bits(b, rsa_iqmp); 575 buffer_get_bignum_bits(b, rsa_q); 576 buffer_get_bignum_bits(b, rsa_p); 577 if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d)) 578 fatal_f("RSA_set0_key failed"); 579 rsa_n = rsa_e = rsa_d = NULL; /* transferred */ 580 if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q)) 581 fatal_f("RSA_set0_factors failed"); 582 rsa_p = rsa_q = NULL; /* transferred */ 583 if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0) 584 fatal_fr(r, "generate RSA parameters"); 585 BN_clear_free(rsa_iqmp); 586 break; 587 } 588 rlen = sshbuf_len(b); 589 if (rlen != 0) 590 error_f("remaining bytes in key blob %d", rlen); 591 592 /* try the key */ 593 if (sshkey_sign(key, &sig, &slen, data, sizeof(data), 594 NULL, NULL, NULL, 0) != 0 || 595 sshkey_verify(key, sig, slen, data, sizeof(data), 596 NULL, 0, NULL) != 0) { 597 sshkey_free(key); 598 free(sig); 599 return NULL; 600 } 601 free(sig); 602 return key; 603 } 604 605 static int 606 get_line(FILE *fp, char *line, size_t len) 607 { 608 int c; 609 size_t pos = 0; 610 611 line[0] = '\0'; 612 while ((c = fgetc(fp)) != EOF) { 613 if (pos >= len - 1) 614 fatal("input line too long."); 615 switch (c) { 616 case '\r': 617 c = fgetc(fp); 618 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) 619 fatal("unget: %s", strerror(errno)); 620 return pos; 621 case '\n': 622 return pos; 623 } 624 line[pos++] = c; 625 line[pos] = '\0'; 626 } 627 /* We reached EOF */ 628 return -1; 629 } 630 631 static void 632 do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private) 633 { 634 int r, blen, escaped = 0; 635 u_int len; 636 char line[1024]; 637 struct sshbuf *buf; 638 char encoded[8096]; 639 FILE *fp; 640 641 if ((buf = sshbuf_new()) == NULL) 642 fatal("sshbuf_new failed"); 643 if ((fp = fopen(identity_file, "r")) == NULL) 644 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 645 encoded[0] = '\0'; 646 while ((blen = get_line(fp, line, sizeof(line))) != -1) { 647 if (blen > 0 && line[blen - 1] == '\\') 648 escaped++; 649 if (strncmp(line, "----", 4) == 0 || 650 strstr(line, ": ") != NULL) { 651 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) 652 *private = 1; 653 if (strstr(line, " END ") != NULL) { 654 break; 655 } 656 /* fprintf(stderr, "ignore: %s", line); */ 657 continue; 658 } 659 if (escaped) { 660 escaped--; 661 /* fprintf(stderr, "escaped: %s", line); */ 662 continue; 663 } 664 strlcat(encoded, line, sizeof(encoded)); 665 } 666 len = strlen(encoded); 667 if (((len % 4) == 3) && 668 (encoded[len-1] == '=') && 669 (encoded[len-2] == '=') && 670 (encoded[len-3] == '=')) 671 encoded[len-3] = '\0'; 672 if ((r = sshbuf_b64tod(buf, encoded)) != 0) 673 fatal_fr(r, "base64 decode"); 674 if (*private) { 675 if ((*k = do_convert_private_ssh2(buf)) == NULL) 676 fatal_f("private key conversion failed"); 677 } else if ((r = sshkey_fromb(buf, k)) != 0) 678 fatal_fr(r, "parse key"); 679 sshbuf_free(buf); 680 fclose(fp); 681 } 682 683 static void 684 do_convert_from_pkcs8(struct sshkey **k, int *private) 685 { 686 EVP_PKEY *pubkey; 687 FILE *fp; 688 689 if ((fp = fopen(identity_file, "r")) == NULL) 690 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 691 if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) { 692 fatal_f("%s is not a recognised public key format", 693 identity_file); 694 } 695 fclose(fp); 696 switch (EVP_PKEY_base_id(pubkey)) { 697 case EVP_PKEY_RSA: 698 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 699 fatal("sshkey_new failed"); 700 (*k)->type = KEY_RSA; 701 (*k)->rsa = EVP_PKEY_get1_RSA(pubkey); 702 break; 703 case EVP_PKEY_DSA: 704 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 705 fatal("sshkey_new failed"); 706 (*k)->type = KEY_DSA; 707 (*k)->dsa = EVP_PKEY_get1_DSA(pubkey); 708 break; 709 #ifdef OPENSSL_HAS_ECC 710 case EVP_PKEY_EC: 711 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 712 fatal("sshkey_new failed"); 713 (*k)->type = KEY_ECDSA; 714 (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey); 715 (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa); 716 break; 717 #endif 718 default: 719 fatal_f("unsupported pubkey type %d", 720 EVP_PKEY_base_id(pubkey)); 721 } 722 EVP_PKEY_free(pubkey); 723 return; 724 } 725 726 static void 727 do_convert_from_pem(struct sshkey **k, int *private) 728 { 729 FILE *fp; 730 RSA *rsa; 731 732 if ((fp = fopen(identity_file, "r")) == NULL) 733 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 734 if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { 735 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 736 fatal("sshkey_new failed"); 737 (*k)->type = KEY_RSA; 738 (*k)->rsa = rsa; 739 fclose(fp); 740 return; 741 } 742 fatal_f("unrecognised raw private key format"); 743 } 744 745 static void 746 do_convert_from(struct passwd *pw) 747 { 748 struct sshkey *k = NULL; 749 int r, private = 0, ok = 0; 750 struct stat st; 751 752 if (!have_identity) 753 ask_filename(pw, "Enter file in which the key is"); 754 if (stat(identity_file, &st) == -1) 755 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 756 757 switch (convert_format) { 758 case FMT_RFC4716: 759 do_convert_from_ssh2(pw, &k, &private); 760 break; 761 case FMT_PKCS8: 762 do_convert_from_pkcs8(&k, &private); 763 break; 764 case FMT_PEM: 765 do_convert_from_pem(&k, &private); 766 break; 767 default: 768 fatal_f("unknown key format %d", convert_format); 769 } 770 771 if (!private) { 772 if ((r = sshkey_write(k, stdout)) == 0) 773 ok = 1; 774 if (ok) 775 fprintf(stdout, "\n"); 776 } else { 777 switch (k->type) { 778 case KEY_DSA: 779 ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, 780 NULL, 0, NULL, NULL); 781 break; 782 #ifdef OPENSSL_HAS_ECC 783 case KEY_ECDSA: 784 ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL, 785 NULL, 0, NULL, NULL); 786 break; 787 #endif 788 case KEY_RSA: 789 ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, 790 NULL, 0, NULL, NULL); 791 break; 792 default: 793 fatal_f("unsupported key type %s", sshkey_type(k)); 794 } 795 } 796 797 if (!ok) 798 fatal("key write failed"); 799 sshkey_free(k); 800 exit(0); 801 } 802 #endif 803 804 static void 805 do_print_public(struct passwd *pw) 806 { 807 struct sshkey *prv; 808 struct stat st; 809 int r; 810 char *comment = NULL; 811 812 if (!have_identity) 813 ask_filename(pw, "Enter file in which the key is"); 814 if (stat(identity_file, &st) == -1) 815 fatal("%s: %s", identity_file, strerror(errno)); 816 prv = load_identity(identity_file, &comment); 817 if ((r = sshkey_write(prv, stdout)) != 0) 818 fatal_fr(r, "write key"); 819 if (comment != NULL && *comment != '\0') 820 fprintf(stdout, " %s", comment); 821 fprintf(stdout, "\n"); 822 if (sshkey_is_sk(prv)) { 823 debug("sk_application: \"%s\", sk_flags 0x%02x", 824 prv->sk_application, prv->sk_flags); 825 } 826 sshkey_free(prv); 827 free(comment); 828 exit(0); 829 } 830 831 static void 832 do_download(struct passwd *pw) 833 { 834 #ifdef ENABLE_PKCS11 835 struct sshkey **keys = NULL; 836 int i, nkeys; 837 enum sshkey_fp_rep rep; 838 int fptype; 839 char *fp, *ra, **comments = NULL; 840 841 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 842 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 843 844 pkcs11_init(1); 845 nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys, &comments); 846 if (nkeys <= 0) 847 fatal("cannot read public key from pkcs11"); 848 for (i = 0; i < nkeys; i++) { 849 if (print_fingerprint) { 850 fp = sshkey_fingerprint(keys[i], fptype, rep); 851 ra = sshkey_fingerprint(keys[i], fingerprint_hash, 852 SSH_FP_RANDOMART); 853 if (fp == NULL || ra == NULL) 854 fatal_f("sshkey_fingerprint fail"); 855 printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]), 856 fp, sshkey_type(keys[i])); 857 if (log_level_get() >= SYSLOG_LEVEL_VERBOSE) 858 printf("%s\n", ra); 859 free(ra); 860 free(fp); 861 } else { 862 (void) sshkey_write(keys[i], stdout); /* XXX check */ 863 fprintf(stdout, "%s%s\n", 864 *(comments[i]) == '\0' ? "" : " ", comments[i]); 865 } 866 free(comments[i]); 867 sshkey_free(keys[i]); 868 } 869 free(comments); 870 free(keys); 871 pkcs11_terminate(); 872 exit(0); 873 #else 874 fatal("no pkcs11 support"); 875 #endif /* ENABLE_PKCS11 */ 876 } 877 878 static struct sshkey * 879 try_read_key(char **cpp) 880 { 881 struct sshkey *ret; 882 int r; 883 884 if ((ret = sshkey_new(KEY_UNSPEC)) == NULL) 885 fatal("sshkey_new failed"); 886 if ((r = sshkey_read(ret, cpp)) == 0) 887 return ret; 888 /* Not a key */ 889 sshkey_free(ret); 890 return NULL; 891 } 892 893 static void 894 fingerprint_one_key(const struct sshkey *public, const char *comment) 895 { 896 char *fp = NULL, *ra = NULL; 897 enum sshkey_fp_rep rep; 898 int fptype; 899 900 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 901 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 902 fp = sshkey_fingerprint(public, fptype, rep); 903 ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART); 904 if (fp == NULL || ra == NULL) 905 fatal_f("sshkey_fingerprint failed"); 906 mprintf("%u %s %s (%s)\n", sshkey_size(public), fp, 907 comment ? comment : "no comment", sshkey_type(public)); 908 if (log_level_get() >= SYSLOG_LEVEL_VERBOSE) 909 printf("%s\n", ra); 910 free(ra); 911 free(fp); 912 } 913 914 static void 915 fingerprint_private(const char *path) 916 { 917 struct stat st; 918 char *comment = NULL; 919 struct sshkey *privkey = NULL, *pubkey = NULL; 920 int r; 921 922 if (stat(identity_file, &st) == -1) 923 fatal("%s: %s", path, strerror(errno)); 924 if ((r = sshkey_load_public(path, &pubkey, &comment)) != 0) 925 debug_r(r, "load public \"%s\"", path); 926 if (pubkey == NULL || comment == NULL || *comment == '\0') { 927 free(comment); 928 if ((r = sshkey_load_private(path, NULL, 929 &privkey, &comment)) != 0) 930 debug_r(r, "load private \"%s\"", path); 931 } 932 if (pubkey == NULL && privkey == NULL) 933 fatal("%s is not a key file.", path); 934 935 fingerprint_one_key(pubkey == NULL ? privkey : pubkey, comment); 936 sshkey_free(pubkey); 937 sshkey_free(privkey); 938 free(comment); 939 } 940 941 static void 942 do_fingerprint(struct passwd *pw) 943 { 944 FILE *f; 945 struct sshkey *public = NULL; 946 char *comment = NULL, *cp, *ep, *line = NULL; 947 size_t linesize = 0; 948 int i, invalid = 1; 949 const char *path; 950 u_long lnum = 0; 951 952 if (!have_identity) 953 ask_filename(pw, "Enter file in which the key is"); 954 path = identity_file; 955 956 if (strcmp(identity_file, "-") == 0) { 957 f = stdin; 958 path = "(stdin)"; 959 } else if ((f = fopen(path, "r")) == NULL) 960 fatal("%s: %s: %s", __progname, path, strerror(errno)); 961 962 while (getline(&line, &linesize, f) != -1) { 963 lnum++; 964 cp = line; 965 cp[strcspn(cp, "\n")] = '\0'; 966 /* Trim leading space and comments */ 967 cp = line + strspn(line, " \t"); 968 if (*cp == '#' || *cp == '\0') 969 continue; 970 971 /* 972 * Input may be plain keys, private keys, authorized_keys 973 * or known_hosts. 974 */ 975 976 /* 977 * Try private keys first. Assume a key is private if 978 * "SSH PRIVATE KEY" appears on the first line and we're 979 * not reading from stdin (XXX support private keys on stdin). 980 */ 981 if (lnum == 1 && strcmp(identity_file, "-") != 0 && 982 strstr(cp, "PRIVATE KEY") != NULL) { 983 free(line); 984 fclose(f); 985 fingerprint_private(path); 986 exit(0); 987 } 988 989 /* 990 * If it's not a private key, then this must be prepared to 991 * accept a public key prefixed with a hostname or options. 992 * Try a bare key first, otherwise skip the leading stuff. 993 */ 994 if ((public = try_read_key(&cp)) == NULL) { 995 i = strtol(cp, &ep, 10); 996 if (i == 0 || ep == NULL || 997 (*ep != ' ' && *ep != '\t')) { 998 int quoted = 0; 999 1000 comment = cp; 1001 for (; *cp && (quoted || (*cp != ' ' && 1002 *cp != '\t')); cp++) { 1003 if (*cp == '\\' && cp[1] == '"') 1004 cp++; /* Skip both */ 1005 else if (*cp == '"') 1006 quoted = !quoted; 1007 } 1008 if (!*cp) 1009 continue; 1010 *cp++ = '\0'; 1011 } 1012 } 1013 /* Retry after parsing leading hostname/key options */ 1014 if (public == NULL && (public = try_read_key(&cp)) == NULL) { 1015 debug("%s:%lu: not a public key", path, lnum); 1016 continue; 1017 } 1018 1019 /* Find trailing comment, if any */ 1020 for (; *cp == ' ' || *cp == '\t'; cp++) 1021 ; 1022 if (*cp != '\0' && *cp != '#') 1023 comment = cp; 1024 1025 fingerprint_one_key(public, comment); 1026 sshkey_free(public); 1027 invalid = 0; /* One good key in the file is sufficient */ 1028 } 1029 fclose(f); 1030 free(line); 1031 1032 if (invalid) 1033 fatal("%s is not a public key file.", path); 1034 exit(0); 1035 } 1036 1037 static void 1038 do_gen_all_hostkeys(struct passwd *pw) 1039 { 1040 struct { 1041 char *key_type; 1042 char *key_type_display; 1043 char *path; 1044 } key_types[] = { 1045 #ifdef WITH_OPENSSL 1046 { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE }, 1047 { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE }, 1048 #ifdef OPENSSL_HAS_ECC 1049 { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE }, 1050 #endif /* OPENSSL_HAS_ECC */ 1051 #endif /* WITH_OPENSSL */ 1052 { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE }, 1053 #ifdef WITH_XMSS 1054 { "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE }, 1055 #endif /* WITH_XMSS */ 1056 { NULL, NULL, NULL } 1057 }; 1058 1059 u_int32_t bits = 0; 1060 int first = 0; 1061 struct stat st; 1062 struct sshkey *private, *public; 1063 char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file; 1064 int i, type, fd, r; 1065 1066 for (i = 0; key_types[i].key_type; i++) { 1067 public = private = NULL; 1068 prv_tmp = pub_tmp = prv_file = pub_file = NULL; 1069 1070 xasprintf(&prv_file, "%s%s", 1071 identity_file, key_types[i].path); 1072 1073 /* Check whether private key exists and is not zero-length */ 1074 if (stat(prv_file, &st) == 0) { 1075 if (st.st_size != 0) 1076 goto next; 1077 } else if (errno != ENOENT) { 1078 error("Could not stat %s: %s", key_types[i].path, 1079 strerror(errno)); 1080 goto failnext; 1081 } 1082 1083 /* 1084 * Private key doesn't exist or is invalid; proceed with 1085 * key generation. 1086 */ 1087 xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX", 1088 identity_file, key_types[i].path); 1089 xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX", 1090 identity_file, key_types[i].path); 1091 xasprintf(&pub_file, "%s%s.pub", 1092 identity_file, key_types[i].path); 1093 1094 if (first == 0) { 1095 first = 1; 1096 printf("%s: generating new host keys: ", __progname); 1097 } 1098 printf("%s ", key_types[i].key_type_display); 1099 fflush(stdout); 1100 type = sshkey_type_from_name(key_types[i].key_type); 1101 if ((fd = mkstemp(prv_tmp)) == -1) { 1102 error("Could not save your private key in %s: %s", 1103 prv_tmp, strerror(errno)); 1104 goto failnext; 1105 } 1106 (void)close(fd); /* just using mkstemp() to reserve a name */ 1107 bits = 0; 1108 type_bits_valid(type, NULL, &bits); 1109 if ((r = sshkey_generate(type, bits, &private)) != 0) { 1110 error_r(r, "sshkey_generate failed"); 1111 goto failnext; 1112 } 1113 if ((r = sshkey_from_private(private, &public)) != 0) 1114 fatal_fr(r, "sshkey_from_private"); 1115 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, 1116 hostname); 1117 if ((r = sshkey_save_private(private, prv_tmp, "", 1118 comment, private_key_format, openssh_format_cipher, 1119 rounds)) != 0) { 1120 error_r(r, "Saving key \"%s\" failed", prv_tmp); 1121 goto failnext; 1122 } 1123 if ((fd = mkstemp(pub_tmp)) == -1) { 1124 error("Could not save your public key in %s: %s", 1125 pub_tmp, strerror(errno)); 1126 goto failnext; 1127 } 1128 (void)fchmod(fd, 0644); 1129 (void)close(fd); 1130 if ((r = sshkey_save_public(public, pub_tmp, comment)) != 0) { 1131 error_r(r, "Unable to save public key to %s", 1132 identity_file); 1133 goto failnext; 1134 } 1135 1136 /* Rename temporary files to their permanent locations. */ 1137 if (rename(pub_tmp, pub_file) != 0) { 1138 error("Unable to move %s into position: %s", 1139 pub_file, strerror(errno)); 1140 goto failnext; 1141 } 1142 if (rename(prv_tmp, prv_file) != 0) { 1143 error("Unable to move %s into position: %s", 1144 key_types[i].path, strerror(errno)); 1145 failnext: 1146 first = 0; 1147 goto next; 1148 } 1149 next: 1150 sshkey_free(private); 1151 sshkey_free(public); 1152 free(prv_tmp); 1153 free(pub_tmp); 1154 free(prv_file); 1155 free(pub_file); 1156 } 1157 if (first != 0) 1158 printf("\n"); 1159 } 1160 1161 struct known_hosts_ctx { 1162 const char *host; /* Hostname searched for in find/delete case */ 1163 FILE *out; /* Output file, stdout for find_hosts case */ 1164 int has_unhashed; /* When hashing, original had unhashed hosts */ 1165 int found_key; /* For find/delete, host was found */ 1166 int invalid; /* File contained invalid items; don't delete */ 1167 int hash_hosts; /* Hash hostnames as we go */ 1168 int find_host; /* Search for specific hostname */ 1169 int delete_host; /* Delete host from known_hosts */ 1170 }; 1171 1172 static int 1173 known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx) 1174 { 1175 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1176 char *hashed, *cp, *hosts, *ohosts; 1177 int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts); 1178 int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM; 1179 1180 switch (l->status) { 1181 case HKF_STATUS_OK: 1182 case HKF_STATUS_MATCHED: 1183 /* 1184 * Don't hash hosts already already hashed, with wildcard 1185 * characters or a CA/revocation marker. 1186 */ 1187 if (was_hashed || has_wild || l->marker != MRK_NONE) { 1188 fprintf(ctx->out, "%s\n", l->line); 1189 if (has_wild && !ctx->find_host) { 1190 logit("%s:%lu: ignoring host name " 1191 "with wildcard: %.64s", l->path, 1192 l->linenum, l->hosts); 1193 } 1194 return 0; 1195 } 1196 /* 1197 * Split any comma-separated hostnames from the host list, 1198 * hash and store separately. 1199 */ 1200 ohosts = hosts = xstrdup(l->hosts); 1201 while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') { 1202 lowercase(cp); 1203 if ((hashed = host_hash(cp, NULL, 0)) == NULL) 1204 fatal("hash_host failed"); 1205 fprintf(ctx->out, "%s %s\n", hashed, l->rawkey); 1206 ctx->has_unhashed = 1; 1207 } 1208 free(ohosts); 1209 return 0; 1210 case HKF_STATUS_INVALID: 1211 /* Retain invalid lines, but mark file as invalid. */ 1212 ctx->invalid = 1; 1213 logit("%s:%lu: invalid line", l->path, l->linenum); 1214 /* FALLTHROUGH */ 1215 default: 1216 fprintf(ctx->out, "%s\n", l->line); 1217 return 0; 1218 } 1219 /* NOTREACHED */ 1220 return -1; 1221 } 1222 1223 static int 1224 known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx) 1225 { 1226 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1227 enum sshkey_fp_rep rep; 1228 int fptype; 1229 char *fp = NULL, *ra = NULL; 1230 1231 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 1232 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 1233 1234 if (l->status == HKF_STATUS_MATCHED) { 1235 if (ctx->delete_host) { 1236 if (l->marker != MRK_NONE) { 1237 /* Don't remove CA and revocation lines */ 1238 fprintf(ctx->out, "%s\n", l->line); 1239 } else { 1240 /* 1241 * Hostname matches and has no CA/revoke 1242 * marker, delete it by *not* writing the 1243 * line to ctx->out. 1244 */ 1245 ctx->found_key = 1; 1246 if (!quiet) 1247 printf("# Host %s found: line %lu\n", 1248 ctx->host, l->linenum); 1249 } 1250 return 0; 1251 } else if (ctx->find_host) { 1252 ctx->found_key = 1; 1253 if (!quiet) { 1254 printf("# Host %s found: line %lu %s\n", 1255 ctx->host, 1256 l->linenum, l->marker == MRK_CA ? "CA" : 1257 (l->marker == MRK_REVOKE ? "REVOKED" : "")); 1258 } 1259 if (ctx->hash_hosts) 1260 known_hosts_hash(l, ctx); 1261 else if (print_fingerprint) { 1262 fp = sshkey_fingerprint(l->key, fptype, rep); 1263 ra = sshkey_fingerprint(l->key, 1264 fingerprint_hash, SSH_FP_RANDOMART); 1265 if (fp == NULL || ra == NULL) 1266 fatal_f("sshkey_fingerprint failed"); 1267 mprintf("%s %s %s%s%s\n", ctx->host, 1268 sshkey_type(l->key), fp, 1269 l->comment[0] ? " " : "", 1270 l->comment); 1271 if (log_level_get() >= SYSLOG_LEVEL_VERBOSE) 1272 printf("%s\n", ra); 1273 free(ra); 1274 free(fp); 1275 } else 1276 fprintf(ctx->out, "%s\n", l->line); 1277 return 0; 1278 } 1279 } else if (ctx->delete_host) { 1280 /* Retain non-matching hosts when deleting */ 1281 if (l->status == HKF_STATUS_INVALID) { 1282 ctx->invalid = 1; 1283 logit("%s:%lu: invalid line", l->path, l->linenum); 1284 } 1285 fprintf(ctx->out, "%s\n", l->line); 1286 } 1287 return 0; 1288 } 1289 1290 static void 1291 do_known_hosts(struct passwd *pw, const char *name, int find_host, 1292 int delete_host, int hash_hosts) 1293 { 1294 char *cp, tmp[PATH_MAX], old[PATH_MAX]; 1295 int r, fd, oerrno, inplace = 0; 1296 struct known_hosts_ctx ctx; 1297 u_int foreach_options; 1298 struct stat sb; 1299 1300 if (!have_identity) { 1301 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); 1302 if (strlcpy(identity_file, cp, sizeof(identity_file)) >= 1303 sizeof(identity_file)) 1304 fatal("Specified known hosts path too long"); 1305 free(cp); 1306 have_identity = 1; 1307 } 1308 if (stat(identity_file, &sb) != 0) 1309 fatal("Cannot stat %s: %s", identity_file, strerror(errno)); 1310 1311 memset(&ctx, 0, sizeof(ctx)); 1312 ctx.out = stdout; 1313 ctx.host = name; 1314 ctx.hash_hosts = hash_hosts; 1315 ctx.find_host = find_host; 1316 ctx.delete_host = delete_host; 1317 1318 /* 1319 * Find hosts goes to stdout, hash and deletions happen in-place 1320 * A corner case is ssh-keygen -HF foo, which should go to stdout 1321 */ 1322 if (!find_host && (hash_hosts || delete_host)) { 1323 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || 1324 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || 1325 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || 1326 strlcat(old, ".old", sizeof(old)) >= sizeof(old)) 1327 fatal("known_hosts path too long"); 1328 umask(077); 1329 if ((fd = mkstemp(tmp)) == -1) 1330 fatal("mkstemp: %s", strerror(errno)); 1331 if ((ctx.out = fdopen(fd, "w")) == NULL) { 1332 oerrno = errno; 1333 unlink(tmp); 1334 fatal("fdopen: %s", strerror(oerrno)); 1335 } 1336 fchmod(fd, sb.st_mode & 0644); 1337 inplace = 1; 1338 } 1339 /* XXX support identity_file == "-" for stdin */ 1340 foreach_options = find_host ? HKF_WANT_MATCH : 0; 1341 foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0; 1342 if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ? 1343 known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL, 1344 foreach_options, 0)) != 0) { 1345 if (inplace) 1346 unlink(tmp); 1347 fatal_fr(r, "hostkeys_foreach"); 1348 } 1349 1350 if (inplace) 1351 fclose(ctx.out); 1352 1353 if (ctx.invalid) { 1354 error("%s is not a valid known_hosts file.", identity_file); 1355 if (inplace) { 1356 error("Not replacing existing known_hosts " 1357 "file because of errors"); 1358 unlink(tmp); 1359 } 1360 exit(1); 1361 } else if (delete_host && !ctx.found_key) { 1362 logit("Host %s not found in %s", name, identity_file); 1363 if (inplace) 1364 unlink(tmp); 1365 } else if (inplace) { 1366 /* Backup existing file */ 1367 if (unlink(old) == -1 && errno != ENOENT) 1368 fatal("unlink %.100s: %s", old, strerror(errno)); 1369 if (link(identity_file, old) == -1) 1370 fatal("link %.100s to %.100s: %s", identity_file, old, 1371 strerror(errno)); 1372 /* Move new one into place */ 1373 if (rename(tmp, identity_file) == -1) { 1374 error("rename\"%s\" to \"%s\": %s", tmp, identity_file, 1375 strerror(errno)); 1376 unlink(tmp); 1377 unlink(old); 1378 exit(1); 1379 } 1380 1381 printf("%s updated.\n", identity_file); 1382 printf("Original contents retained as %s\n", old); 1383 if (ctx.has_unhashed) { 1384 logit("WARNING: %s contains unhashed entries", old); 1385 logit("Delete this file to ensure privacy " 1386 "of hostnames"); 1387 } 1388 } 1389 1390 exit (find_host && !ctx.found_key); 1391 } 1392 1393 /* 1394 * Perform changing a passphrase. The argument is the passwd structure 1395 * for the current user. 1396 */ 1397 static void 1398 do_change_passphrase(struct passwd *pw) 1399 { 1400 char *comment; 1401 char *old_passphrase, *passphrase1, *passphrase2; 1402 struct stat st; 1403 struct sshkey *private; 1404 int r; 1405 1406 if (!have_identity) 1407 ask_filename(pw, "Enter file in which the key is"); 1408 if (stat(identity_file, &st) == -1) 1409 fatal("%s: %s", identity_file, strerror(errno)); 1410 /* Try to load the file with empty passphrase. */ 1411 r = sshkey_load_private(identity_file, "", &private, &comment); 1412 if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) { 1413 if (identity_passphrase) 1414 old_passphrase = xstrdup(identity_passphrase); 1415 else 1416 old_passphrase = 1417 read_passphrase("Enter old passphrase: ", 1418 RP_ALLOW_STDIN); 1419 r = sshkey_load_private(identity_file, old_passphrase, 1420 &private, &comment); 1421 freezero(old_passphrase, strlen(old_passphrase)); 1422 if (r != 0) 1423 goto badkey; 1424 } else if (r != 0) { 1425 badkey: 1426 fatal_r(r, "Failed to load key %s", identity_file); 1427 } 1428 if (comment) 1429 mprintf("Key has comment '%s'\n", comment); 1430 1431 /* Ask the new passphrase (twice). */ 1432 if (identity_new_passphrase) { 1433 passphrase1 = xstrdup(identity_new_passphrase); 1434 passphrase2 = NULL; 1435 } else { 1436 passphrase1 = 1437 read_passphrase("Enter new passphrase (empty for no " 1438 "passphrase): ", RP_ALLOW_STDIN); 1439 passphrase2 = read_passphrase("Enter same passphrase again: ", 1440 RP_ALLOW_STDIN); 1441 1442 /* Verify that they are the same. */ 1443 if (strcmp(passphrase1, passphrase2) != 0) { 1444 explicit_bzero(passphrase1, strlen(passphrase1)); 1445 explicit_bzero(passphrase2, strlen(passphrase2)); 1446 free(passphrase1); 1447 free(passphrase2); 1448 printf("Pass phrases do not match. Try again.\n"); 1449 exit(1); 1450 } 1451 /* Destroy the other copy. */ 1452 freezero(passphrase2, strlen(passphrase2)); 1453 } 1454 1455 /* Save the file using the new passphrase. */ 1456 if ((r = sshkey_save_private(private, identity_file, passphrase1, 1457 comment, private_key_format, openssh_format_cipher, rounds)) != 0) { 1458 error_r(r, "Saving key \"%s\" failed", identity_file); 1459 freezero(passphrase1, strlen(passphrase1)); 1460 sshkey_free(private); 1461 free(comment); 1462 exit(1); 1463 } 1464 /* Destroy the passphrase and the copy of the key in memory. */ 1465 freezero(passphrase1, strlen(passphrase1)); 1466 sshkey_free(private); /* Destroys contents */ 1467 free(comment); 1468 1469 printf("Your identification has been saved with the new passphrase.\n"); 1470 exit(0); 1471 } 1472 1473 /* 1474 * Print the SSHFP RR. 1475 */ 1476 static int 1477 do_print_resource_record(struct passwd *pw, char *fname, char *hname, 1478 int print_generic) 1479 { 1480 struct sshkey *public; 1481 char *comment = NULL; 1482 struct stat st; 1483 int r; 1484 1485 if (fname == NULL) 1486 fatal_f("no filename"); 1487 if (stat(fname, &st) == -1) { 1488 if (errno == ENOENT) 1489 return 0; 1490 fatal("%s: %s", fname, strerror(errno)); 1491 } 1492 if ((r = sshkey_load_public(fname, &public, &comment)) != 0) 1493 fatal_r(r, "Failed to read v2 public key from \"%s\"", fname); 1494 export_dns_rr(hname, public, stdout, print_generic); 1495 sshkey_free(public); 1496 free(comment); 1497 return 1; 1498 } 1499 1500 /* 1501 * Change the comment of a private key file. 1502 */ 1503 static void 1504 do_change_comment(struct passwd *pw, const char *identity_comment) 1505 { 1506 char new_comment[1024], *comment, *passphrase; 1507 struct sshkey *private; 1508 struct sshkey *public; 1509 struct stat st; 1510 int r; 1511 1512 if (!have_identity) 1513 ask_filename(pw, "Enter file in which the key is"); 1514 if (stat(identity_file, &st) == -1) 1515 fatal("%s: %s", identity_file, strerror(errno)); 1516 if ((r = sshkey_load_private(identity_file, "", 1517 &private, &comment)) == 0) 1518 passphrase = xstrdup(""); 1519 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 1520 fatal_r(r, "Cannot load private key \"%s\"", identity_file); 1521 else { 1522 if (identity_passphrase) 1523 passphrase = xstrdup(identity_passphrase); 1524 else if (identity_new_passphrase) 1525 passphrase = xstrdup(identity_new_passphrase); 1526 else 1527 passphrase = read_passphrase("Enter passphrase: ", 1528 RP_ALLOW_STDIN); 1529 /* Try to load using the passphrase. */ 1530 if ((r = sshkey_load_private(identity_file, passphrase, 1531 &private, &comment)) != 0) { 1532 freezero(passphrase, strlen(passphrase)); 1533 fatal_r(r, "Cannot load private key \"%s\"", 1534 identity_file); 1535 } 1536 } 1537 1538 if (private->type != KEY_ED25519 && private->type != KEY_XMSS && 1539 private_key_format != SSHKEY_PRIVATE_OPENSSH) { 1540 error("Comments are only supported for keys stored in " 1541 "the new format (-o)."); 1542 explicit_bzero(passphrase, strlen(passphrase)); 1543 sshkey_free(private); 1544 exit(1); 1545 } 1546 if (comment) 1547 printf("Old comment: %s\n", comment); 1548 else 1549 printf("No existing comment\n"); 1550 1551 if (identity_comment) { 1552 strlcpy(new_comment, identity_comment, sizeof(new_comment)); 1553 } else { 1554 printf("New comment: "); 1555 fflush(stdout); 1556 if (!fgets(new_comment, sizeof(new_comment), stdin)) { 1557 explicit_bzero(passphrase, strlen(passphrase)); 1558 sshkey_free(private); 1559 exit(1); 1560 } 1561 new_comment[strcspn(new_comment, "\n")] = '\0'; 1562 } 1563 if (comment != NULL && strcmp(comment, new_comment) == 0) { 1564 printf("No change to comment\n"); 1565 free(passphrase); 1566 sshkey_free(private); 1567 free(comment); 1568 exit(0); 1569 } 1570 1571 /* Save the file using the new passphrase. */ 1572 if ((r = sshkey_save_private(private, identity_file, passphrase, 1573 new_comment, private_key_format, openssh_format_cipher, 1574 rounds)) != 0) { 1575 error_r(r, "Saving key \"%s\" failed", identity_file); 1576 freezero(passphrase, strlen(passphrase)); 1577 sshkey_free(private); 1578 free(comment); 1579 exit(1); 1580 } 1581 freezero(passphrase, strlen(passphrase)); 1582 if ((r = sshkey_from_private(private, &public)) != 0) 1583 fatal_fr(r, "sshkey_from_private"); 1584 sshkey_free(private); 1585 1586 strlcat(identity_file, ".pub", sizeof(identity_file)); 1587 if ((r = sshkey_save_public(public, identity_file, new_comment)) != 0) 1588 fatal_r(r, "Unable to save public key to %s", identity_file); 1589 sshkey_free(public); 1590 free(comment); 1591 1592 if (strlen(new_comment) > 0) 1593 printf("Comment '%s' applied\n", new_comment); 1594 else 1595 printf("Comment removed\n"); 1596 1597 exit(0); 1598 } 1599 1600 static void 1601 cert_ext_add(const char *key, const char *value, int iscrit) 1602 { 1603 cert_ext = xreallocarray(cert_ext, ncert_ext + 1, sizeof(*cert_ext)); 1604 cert_ext[ncert_ext].key = xstrdup(key); 1605 cert_ext[ncert_ext].val = value == NULL ? NULL : xstrdup(value); 1606 cert_ext[ncert_ext].crit = iscrit; 1607 ncert_ext++; 1608 } 1609 1610 /* qsort(3) comparison function for certificate extensions */ 1611 static int 1612 cert_ext_cmp(const void *_a, const void *_b) 1613 { 1614 const struct cert_ext *a = (const struct cert_ext *)_a; 1615 const struct cert_ext *b = (const struct cert_ext *)_b; 1616 int r; 1617 1618 if (a->crit != b->crit) 1619 return (a->crit < b->crit) ? -1 : 1; 1620 if ((r = strcmp(a->key, b->key)) != 0) 1621 return r; 1622 if ((a->val == NULL) != (b->val == NULL)) 1623 return (a->val == NULL) ? -1 : 1; 1624 if (a->val != NULL && (r = strcmp(a->val, b->val)) != 0) 1625 return r; 1626 return 0; 1627 } 1628 1629 #define OPTIONS_CRITICAL 1 1630 #define OPTIONS_EXTENSIONS 2 1631 static void 1632 prepare_options_buf(struct sshbuf *c, int which) 1633 { 1634 struct sshbuf *b; 1635 size_t i; 1636 int r; 1637 const struct cert_ext *ext; 1638 1639 if ((b = sshbuf_new()) == NULL) 1640 fatal_f("sshbuf_new failed"); 1641 sshbuf_reset(c); 1642 for (i = 0; i < ncert_ext; i++) { 1643 ext = &cert_ext[i]; 1644 if ((ext->crit && (which & OPTIONS_EXTENSIONS)) || 1645 (!ext->crit && (which & OPTIONS_CRITICAL))) 1646 continue; 1647 if (ext->val == NULL) { 1648 /* flag option */ 1649 debug3_f("%s", ext->key); 1650 if ((r = sshbuf_put_cstring(c, ext->key)) != 0 || 1651 (r = sshbuf_put_string(c, NULL, 0)) != 0) 1652 fatal_fr(r, "prepare flag"); 1653 } else { 1654 /* key/value option */ 1655 debug3_f("%s=%s", ext->key, ext->val); 1656 sshbuf_reset(b); 1657 if ((r = sshbuf_put_cstring(c, ext->key)) != 0 || 1658 (r = sshbuf_put_cstring(b, ext->val)) != 0 || 1659 (r = sshbuf_put_stringb(c, b)) != 0) 1660 fatal_fr(r, "prepare k/v"); 1661 } 1662 } 1663 sshbuf_free(b); 1664 } 1665 1666 static void 1667 finalise_cert_exts(void) 1668 { 1669 /* critical options */ 1670 if (certflags_command != NULL) 1671 cert_ext_add("force-command", certflags_command, 1); 1672 if (certflags_src_addr != NULL) 1673 cert_ext_add("source-address", certflags_src_addr, 1); 1674 /* extensions */ 1675 if ((certflags_flags & CERTOPT_X_FWD) != 0) 1676 cert_ext_add("permit-X11-forwarding", NULL, 0); 1677 if ((certflags_flags & CERTOPT_AGENT_FWD) != 0) 1678 cert_ext_add("permit-agent-forwarding", NULL, 0); 1679 if ((certflags_flags & CERTOPT_PORT_FWD) != 0) 1680 cert_ext_add("permit-port-forwarding", NULL, 0); 1681 if ((certflags_flags & CERTOPT_PTY) != 0) 1682 cert_ext_add("permit-pty", NULL, 0); 1683 if ((certflags_flags & CERTOPT_USER_RC) != 0) 1684 cert_ext_add("permit-user-rc", NULL, 0); 1685 if ((certflags_flags & CERTOPT_NO_REQUIRE_USER_PRESENCE) != 0) 1686 cert_ext_add("no-touch-required", NULL, 0); 1687 /* order lexically by key */ 1688 if (ncert_ext > 0) 1689 qsort(cert_ext, ncert_ext, sizeof(*cert_ext), cert_ext_cmp); 1690 } 1691 1692 static struct sshkey * 1693 load_pkcs11_key(char *path) 1694 { 1695 #ifdef ENABLE_PKCS11 1696 struct sshkey **keys = NULL, *public, *private = NULL; 1697 int r, i, nkeys; 1698 1699 if ((r = sshkey_load_public(path, &public, NULL)) != 0) 1700 fatal_r(r, "Couldn't load CA public key \"%s\"", path); 1701 1702 nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, 1703 &keys, NULL); 1704 debug3_f("%d keys", nkeys); 1705 if (nkeys <= 0) 1706 fatal("cannot read public key from pkcs11"); 1707 for (i = 0; i < nkeys; i++) { 1708 if (sshkey_equal_public(public, keys[i])) { 1709 private = keys[i]; 1710 continue; 1711 } 1712 sshkey_free(keys[i]); 1713 } 1714 free(keys); 1715 sshkey_free(public); 1716 return private; 1717 #else 1718 fatal("no pkcs11 support"); 1719 #endif /* ENABLE_PKCS11 */ 1720 } 1721 1722 /* Signer for sshkey_certify_custom that uses the agent */ 1723 static int 1724 agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp, 1725 const u_char *data, size_t datalen, 1726 const char *alg, const char *provider, const char *pin, 1727 u_int compat, void *ctx) 1728 { 1729 int *agent_fdp = (int *)ctx; 1730 1731 return ssh_agent_sign(*agent_fdp, key, sigp, lenp, 1732 data, datalen, alg, compat); 1733 } 1734 1735 static void 1736 do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent, 1737 unsigned long long cert_serial, int cert_serial_autoinc, 1738 int argc, char **argv) 1739 { 1740 int r, i, found, agent_fd = -1; 1741 u_int n; 1742 struct sshkey *ca, *public; 1743 char valid[64], *otmp, *tmp, *cp, *out, *comment; 1744 char *ca_fp = NULL, **plist = NULL, *pin = NULL; 1745 struct ssh_identitylist *agent_ids; 1746 size_t j; 1747 struct notifier_ctx *notifier = NULL; 1748 1749 #ifdef ENABLE_PKCS11 1750 pkcs11_init(1); 1751 #endif 1752 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 1753 if (pkcs11provider != NULL) { 1754 /* If a PKCS#11 token was specified then try to use it */ 1755 if ((ca = load_pkcs11_key(tmp)) == NULL) 1756 fatal("No PKCS#11 key matching %s found", ca_key_path); 1757 } else if (prefer_agent) { 1758 /* 1759 * Agent signature requested. Try to use agent after making 1760 * sure the public key specified is actually present in the 1761 * agent. 1762 */ 1763 if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) 1764 fatal_r(r, "Cannot load CA public key %s", tmp); 1765 if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) 1766 fatal_r(r, "Cannot use public key for CA signature"); 1767 if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0) 1768 fatal_r(r, "Retrieve agent key list"); 1769 found = 0; 1770 for (j = 0; j < agent_ids->nkeys; j++) { 1771 if (sshkey_equal(ca, agent_ids->keys[j])) { 1772 found = 1; 1773 break; 1774 } 1775 } 1776 if (!found) 1777 fatal("CA key %s not found in agent", tmp); 1778 ssh_free_identitylist(agent_ids); 1779 ca->flags |= SSHKEY_FLAG_EXT; 1780 } else { 1781 /* CA key is assumed to be a private key on the filesystem */ 1782 ca = load_identity(tmp, NULL); 1783 if (sshkey_is_sk(ca) && 1784 (ca->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) { 1785 if ((pin = read_passphrase("Enter PIN for CA key: ", 1786 RP_ALLOW_STDIN)) == NULL) 1787 fatal_f("couldn't read PIN"); 1788 } 1789 } 1790 free(tmp); 1791 1792 if (key_type_name != NULL) { 1793 if (sshkey_type_from_name(key_type_name) != ca->type) { 1794 fatal("CA key type %s doesn't match specified %s", 1795 sshkey_ssh_name(ca), key_type_name); 1796 } 1797 } else if (ca->type == KEY_RSA) { 1798 /* Default to a good signature algorithm */ 1799 key_type_name = "rsa-sha2-512"; 1800 } 1801 ca_fp = sshkey_fingerprint(ca, fingerprint_hash, SSH_FP_DEFAULT); 1802 1803 finalise_cert_exts(); 1804 for (i = 0; i < argc; i++) { 1805 /* Split list of principals */ 1806 n = 0; 1807 if (cert_principals != NULL) { 1808 otmp = tmp = xstrdup(cert_principals); 1809 plist = NULL; 1810 for (; (cp = strsep(&tmp, ",")) != NULL; n++) { 1811 plist = xreallocarray(plist, n + 1, sizeof(*plist)); 1812 if (*(plist[n] = xstrdup(cp)) == '\0') 1813 fatal("Empty principal name"); 1814 } 1815 free(otmp); 1816 } 1817 if (n > SSHKEY_CERT_MAX_PRINCIPALS) 1818 fatal("Too many certificate principals specified"); 1819 1820 tmp = tilde_expand_filename(argv[i], pw->pw_uid); 1821 if ((r = sshkey_load_public(tmp, &public, &comment)) != 0) 1822 fatal_r(r, "load pubkey \"%s\"", tmp); 1823 if (sshkey_is_cert(public)) 1824 fatal_f("key \"%s\" type %s cannot be certified", 1825 tmp, sshkey_type(public)); 1826 1827 /* Prepare certificate to sign */ 1828 if ((r = sshkey_to_certified(public)) != 0) 1829 fatal_r(r, "Could not upgrade key %s to certificate", tmp); 1830 public->cert->type = cert_key_type; 1831 public->cert->serial = (u_int64_t)cert_serial; 1832 public->cert->key_id = xstrdup(cert_key_id); 1833 public->cert->nprincipals = n; 1834 public->cert->principals = plist; 1835 public->cert->valid_after = cert_valid_from; 1836 public->cert->valid_before = cert_valid_to; 1837 prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL); 1838 prepare_options_buf(public->cert->extensions, 1839 OPTIONS_EXTENSIONS); 1840 if ((r = sshkey_from_private(ca, 1841 &public->cert->signature_key)) != 0) 1842 fatal_r(r, "sshkey_from_private (ca key)"); 1843 1844 if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) { 1845 if ((r = sshkey_certify_custom(public, ca, 1846 key_type_name, sk_provider, NULL, agent_signer, 1847 &agent_fd)) != 0) 1848 fatal_r(r, "Couldn't certify %s via agent", tmp); 1849 } else { 1850 if (sshkey_is_sk(ca) && 1851 (ca->sk_flags & SSH_SK_USER_PRESENCE_REQD)) { 1852 notifier = notify_start(0, 1853 "Confirm user presence for key %s %s", 1854 sshkey_type(ca), ca_fp); 1855 } 1856 r = sshkey_certify(public, ca, key_type_name, 1857 sk_provider, pin); 1858 notify_complete(notifier, "User presence confirmed"); 1859 if (r != 0) 1860 fatal_r(r, "Couldn't certify key %s", tmp); 1861 } 1862 1863 if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0) 1864 *cp = '\0'; 1865 xasprintf(&out, "%s-cert.pub", tmp); 1866 free(tmp); 1867 1868 if ((r = sshkey_save_public(public, out, comment)) != 0) { 1869 fatal_r(r, "Unable to save public key to %s", 1870 identity_file); 1871 } 1872 1873 if (!quiet) { 1874 sshkey_format_cert_validity(public->cert, 1875 valid, sizeof(valid)); 1876 logit("Signed %s key %s: id \"%s\" serial %llu%s%s " 1877 "valid %s", sshkey_cert_type(public), 1878 out, public->cert->key_id, 1879 (unsigned long long)public->cert->serial, 1880 cert_principals != NULL ? " for " : "", 1881 cert_principals != NULL ? cert_principals : "", 1882 valid); 1883 } 1884 1885 sshkey_free(public); 1886 free(out); 1887 if (cert_serial_autoinc) 1888 cert_serial++; 1889 } 1890 if (pin != NULL) 1891 freezero(pin, strlen(pin)); 1892 free(ca_fp); 1893 #ifdef ENABLE_PKCS11 1894 pkcs11_terminate(); 1895 #endif 1896 exit(0); 1897 } 1898 1899 static u_int64_t 1900 parse_relative_time(const char *s, time_t now) 1901 { 1902 int64_t mul, secs; 1903 1904 mul = *s == '-' ? -1 : 1; 1905 1906 if ((secs = convtime(s + 1)) == -1) 1907 fatal("Invalid relative certificate time %s", s); 1908 if (mul == -1 && secs > now) 1909 fatal("Certificate time %s cannot be represented", s); 1910 return now + (u_int64_t)(secs * mul); 1911 } 1912 1913 static void 1914 parse_cert_times(char *timespec) 1915 { 1916 char *from, *to; 1917 time_t now = time(NULL); 1918 int64_t secs; 1919 1920 /* +timespec relative to now */ 1921 if (*timespec == '+' && strchr(timespec, ':') == NULL) { 1922 if ((secs = convtime(timespec + 1)) == -1) 1923 fatal("Invalid relative certificate life %s", timespec); 1924 cert_valid_to = now + secs; 1925 /* 1926 * Backdate certificate one minute to avoid problems on hosts 1927 * with poorly-synchronised clocks. 1928 */ 1929 cert_valid_from = ((now - 59)/ 60) * 60; 1930 return; 1931 } 1932 1933 /* 1934 * from:to, where 1935 * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | "always" 1936 * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | "forever" 1937 */ 1938 from = xstrdup(timespec); 1939 to = strchr(from, ':'); 1940 if (to == NULL || from == to || *(to + 1) == '\0') 1941 fatal("Invalid certificate life specification %s", timespec); 1942 *to++ = '\0'; 1943 1944 if (*from == '-' || *from == '+') 1945 cert_valid_from = parse_relative_time(from, now); 1946 else if (strcmp(from, "always") == 0) 1947 cert_valid_from = 0; 1948 else if (parse_absolute_time(from, &cert_valid_from) != 0) 1949 fatal("Invalid from time \"%s\"", from); 1950 1951 if (*to == '-' || *to == '+') 1952 cert_valid_to = parse_relative_time(to, now); 1953 else if (strcmp(to, "forever") == 0) 1954 cert_valid_to = ~(u_int64_t)0; 1955 else if (parse_absolute_time(to, &cert_valid_to) != 0) 1956 fatal("Invalid to time \"%s\"", to); 1957 1958 if (cert_valid_to <= cert_valid_from) 1959 fatal("Empty certificate validity interval"); 1960 free(from); 1961 } 1962 1963 static void 1964 add_cert_option(char *opt) 1965 { 1966 char *val, *cp; 1967 int iscrit = 0; 1968 1969 if (strcasecmp(opt, "clear") == 0) 1970 certflags_flags = 0; 1971 else if (strcasecmp(opt, "no-x11-forwarding") == 0) 1972 certflags_flags &= ~CERTOPT_X_FWD; 1973 else if (strcasecmp(opt, "permit-x11-forwarding") == 0) 1974 certflags_flags |= CERTOPT_X_FWD; 1975 else if (strcasecmp(opt, "no-agent-forwarding") == 0) 1976 certflags_flags &= ~CERTOPT_AGENT_FWD; 1977 else if (strcasecmp(opt, "permit-agent-forwarding") == 0) 1978 certflags_flags |= CERTOPT_AGENT_FWD; 1979 else if (strcasecmp(opt, "no-port-forwarding") == 0) 1980 certflags_flags &= ~CERTOPT_PORT_FWD; 1981 else if (strcasecmp(opt, "permit-port-forwarding") == 0) 1982 certflags_flags |= CERTOPT_PORT_FWD; 1983 else if (strcasecmp(opt, "no-pty") == 0) 1984 certflags_flags &= ~CERTOPT_PTY; 1985 else if (strcasecmp(opt, "permit-pty") == 0) 1986 certflags_flags |= CERTOPT_PTY; 1987 else if (strcasecmp(opt, "no-user-rc") == 0) 1988 certflags_flags &= ~CERTOPT_USER_RC; 1989 else if (strcasecmp(opt, "permit-user-rc") == 0) 1990 certflags_flags |= CERTOPT_USER_RC; 1991 else if (strcasecmp(opt, "touch-required") == 0) 1992 certflags_flags &= ~CERTOPT_NO_REQUIRE_USER_PRESENCE; 1993 else if (strcasecmp(opt, "no-touch-required") == 0) 1994 certflags_flags |= CERTOPT_NO_REQUIRE_USER_PRESENCE; 1995 else if (strncasecmp(opt, "force-command=", 14) == 0) { 1996 val = opt + 14; 1997 if (*val == '\0') 1998 fatal("Empty force-command option"); 1999 if (certflags_command != NULL) 2000 fatal("force-command already specified"); 2001 certflags_command = xstrdup(val); 2002 } else if (strncasecmp(opt, "source-address=", 15) == 0) { 2003 val = opt + 15; 2004 if (*val == '\0') 2005 fatal("Empty source-address option"); 2006 if (certflags_src_addr != NULL) 2007 fatal("source-address already specified"); 2008 if (addr_match_cidr_list(NULL, val) != 0) 2009 fatal("Invalid source-address list"); 2010 certflags_src_addr = xstrdup(val); 2011 } else if (strncasecmp(opt, "extension:", 10) == 0 || 2012 (iscrit = (strncasecmp(opt, "critical:", 9) == 0))) { 2013 val = xstrdup(strchr(opt, ':') + 1); 2014 if ((cp = strchr(val, '=')) != NULL) 2015 *cp++ = '\0'; 2016 cert_ext_add(val, cp, iscrit); 2017 free(val); 2018 } else 2019 fatal("Unsupported certificate option \"%s\"", opt); 2020 } 2021 2022 static void 2023 show_options(struct sshbuf *optbuf, int in_critical) 2024 { 2025 char *name, *arg, *hex; 2026 struct sshbuf *options, *option = NULL; 2027 int r; 2028 2029 if ((options = sshbuf_fromb(optbuf)) == NULL) 2030 fatal_f("sshbuf_fromb failed"); 2031 while (sshbuf_len(options) != 0) { 2032 sshbuf_free(option); 2033 option = NULL; 2034 if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 || 2035 (r = sshbuf_froms(options, &option)) != 0) 2036 fatal_fr(r, "parse option"); 2037 printf(" %s", name); 2038 if (!in_critical && 2039 (strcmp(name, "permit-X11-forwarding") == 0 || 2040 strcmp(name, "permit-agent-forwarding") == 0 || 2041 strcmp(name, "permit-port-forwarding") == 0 || 2042 strcmp(name, "permit-pty") == 0 || 2043 strcmp(name, "permit-user-rc") == 0 || 2044 strcmp(name, "no-touch-required") == 0)) { 2045 printf("\n"); 2046 } else if (in_critical && 2047 (strcmp(name, "force-command") == 0 || 2048 strcmp(name, "source-address") == 0)) { 2049 if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0) 2050 fatal_fr(r, "parse critical"); 2051 printf(" %s\n", arg); 2052 free(arg); 2053 } else if (sshbuf_len(option) > 0) { 2054 hex = sshbuf_dtob16(option); 2055 printf(" UNKNOWN OPTION: %s (len %zu)\n", 2056 hex, sshbuf_len(option)); 2057 sshbuf_reset(option); 2058 free(hex); 2059 } else 2060 printf(" UNKNOWN FLAG OPTION\n"); 2061 free(name); 2062 if (sshbuf_len(option) != 0) 2063 fatal("Option corrupt: extra data at end"); 2064 } 2065 sshbuf_free(option); 2066 sshbuf_free(options); 2067 } 2068 2069 static void 2070 print_cert(struct sshkey *key) 2071 { 2072 char valid[64], *key_fp, *ca_fp; 2073 u_int i; 2074 2075 key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT); 2076 ca_fp = sshkey_fingerprint(key->cert->signature_key, 2077 fingerprint_hash, SSH_FP_DEFAULT); 2078 if (key_fp == NULL || ca_fp == NULL) 2079 fatal_f("sshkey_fingerprint fail"); 2080 sshkey_format_cert_validity(key->cert, valid, sizeof(valid)); 2081 2082 printf(" Type: %s %s certificate\n", sshkey_ssh_name(key), 2083 sshkey_cert_type(key)); 2084 printf(" Public key: %s %s\n", sshkey_type(key), key_fp); 2085 printf(" Signing CA: %s %s (using %s)\n", 2086 sshkey_type(key->cert->signature_key), ca_fp, 2087 key->cert->signature_type); 2088 printf(" Key ID: \"%s\"\n", key->cert->key_id); 2089 printf(" Serial: %llu\n", (unsigned long long)key->cert->serial); 2090 printf(" Valid: %s\n", valid); 2091 printf(" Principals: "); 2092 if (key->cert->nprincipals == 0) 2093 printf("(none)\n"); 2094 else { 2095 for (i = 0; i < key->cert->nprincipals; i++) 2096 printf("\n %s", 2097 key->cert->principals[i]); 2098 printf("\n"); 2099 } 2100 printf(" Critical Options: "); 2101 if (sshbuf_len(key->cert->critical) == 0) 2102 printf("(none)\n"); 2103 else { 2104 printf("\n"); 2105 show_options(key->cert->critical, 1); 2106 } 2107 printf(" Extensions: "); 2108 if (sshbuf_len(key->cert->extensions) == 0) 2109 printf("(none)\n"); 2110 else { 2111 printf("\n"); 2112 show_options(key->cert->extensions, 0); 2113 } 2114 } 2115 2116 static void 2117 do_show_cert(struct passwd *pw) 2118 { 2119 struct sshkey *key = NULL; 2120 struct stat st; 2121 int r, is_stdin = 0, ok = 0; 2122 FILE *f; 2123 char *cp, *line = NULL; 2124 const char *path; 2125 size_t linesize = 0; 2126 u_long lnum = 0; 2127 2128 if (!have_identity) 2129 ask_filename(pw, "Enter file in which the key is"); 2130 if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1) 2131 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 2132 2133 path = identity_file; 2134 if (strcmp(path, "-") == 0) { 2135 f = stdin; 2136 path = "(stdin)"; 2137 is_stdin = 1; 2138 } else if ((f = fopen(identity_file, "r")) == NULL) 2139 fatal("fopen %s: %s", identity_file, strerror(errno)); 2140 2141 while (getline(&line, &linesize, f) != -1) { 2142 lnum++; 2143 sshkey_free(key); 2144 key = NULL; 2145 /* Trim leading space and comments */ 2146 cp = line + strspn(line, " \t"); 2147 if (*cp == '#' || *cp == '\0') 2148 continue; 2149 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 2150 fatal("sshkey_new"); 2151 if ((r = sshkey_read(key, &cp)) != 0) { 2152 error_r(r, "%s:%lu: invalid key", path, lnum); 2153 continue; 2154 } 2155 if (!sshkey_is_cert(key)) { 2156 error("%s:%lu is not a certificate", path, lnum); 2157 continue; 2158 } 2159 ok = 1; 2160 if (!is_stdin && lnum == 1) 2161 printf("%s:\n", path); 2162 else 2163 printf("%s:%lu:\n", path, lnum); 2164 print_cert(key); 2165 } 2166 free(line); 2167 sshkey_free(key); 2168 fclose(f); 2169 exit(ok ? 0 : 1); 2170 } 2171 2172 static void 2173 load_krl(const char *path, struct ssh_krl **krlp) 2174 { 2175 struct sshbuf *krlbuf; 2176 int r; 2177 2178 if ((r = sshbuf_load_file(path, &krlbuf)) != 0) 2179 fatal_r(r, "Unable to load KRL %s", path); 2180 /* XXX check sigs */ 2181 if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 || 2182 *krlp == NULL) 2183 fatal_r(r, "Invalid KRL file %s", path); 2184 sshbuf_free(krlbuf); 2185 } 2186 2187 static void 2188 hash_to_blob(const char *cp, u_char **blobp, size_t *lenp, 2189 const char *file, u_long lnum) 2190 { 2191 char *tmp; 2192 size_t tlen; 2193 struct sshbuf *b; 2194 int r; 2195 2196 if (strncmp(cp, "SHA256:", 7) != 0) 2197 fatal("%s:%lu: unsupported hash algorithm", file, lnum); 2198 cp += 7; 2199 2200 /* 2201 * OpenSSH base64 hashes omit trailing '=' 2202 * characters; put them back for decode. 2203 */ 2204 tlen = strlen(cp); 2205 tmp = xmalloc(tlen + 4 + 1); 2206 strlcpy(tmp, cp, tlen + 1); 2207 while ((tlen % 4) != 0) { 2208 tmp[tlen++] = '='; 2209 tmp[tlen] = '\0'; 2210 } 2211 if ((b = sshbuf_new()) == NULL) 2212 fatal_f("sshbuf_new failed"); 2213 if ((r = sshbuf_b64tod(b, tmp)) != 0) 2214 fatal_r(r, "%s:%lu: decode hash failed", file, lnum); 2215 free(tmp); 2216 *lenp = sshbuf_len(b); 2217 *blobp = xmalloc(*lenp); 2218 memcpy(*blobp, sshbuf_ptr(b), *lenp); 2219 sshbuf_free(b); 2220 } 2221 2222 static void 2223 update_krl_from_file(struct passwd *pw, const char *file, int wild_ca, 2224 const struct sshkey *ca, struct ssh_krl *krl) 2225 { 2226 struct sshkey *key = NULL; 2227 u_long lnum = 0; 2228 char *path, *cp, *ep, *line = NULL; 2229 u_char *blob = NULL; 2230 size_t blen = 0, linesize = 0; 2231 unsigned long long serial, serial2; 2232 int i, was_explicit_key, was_sha1, was_sha256, was_hash, r; 2233 FILE *krl_spec; 2234 2235 path = tilde_expand_filename(file, pw->pw_uid); 2236 if (strcmp(path, "-") == 0) { 2237 krl_spec = stdin; 2238 free(path); 2239 path = xstrdup("(standard input)"); 2240 } else if ((krl_spec = fopen(path, "r")) == NULL) 2241 fatal("fopen %s: %s", path, strerror(errno)); 2242 2243 if (!quiet) 2244 printf("Revoking from %s\n", path); 2245 while (getline(&line, &linesize, krl_spec) != -1) { 2246 lnum++; 2247 was_explicit_key = was_sha1 = was_sha256 = was_hash = 0; 2248 cp = line + strspn(line, " \t"); 2249 /* Trim trailing space, comments and strip \n */ 2250 for (i = 0, r = -1; cp[i] != '\0'; i++) { 2251 if (cp[i] == '#' || cp[i] == '\n') { 2252 cp[i] = '\0'; 2253 break; 2254 } 2255 if (cp[i] == ' ' || cp[i] == '\t') { 2256 /* Remember the start of a span of whitespace */ 2257 if (r == -1) 2258 r = i; 2259 } else 2260 r = -1; 2261 } 2262 if (r != -1) 2263 cp[r] = '\0'; 2264 if (*cp == '\0') 2265 continue; 2266 if (strncasecmp(cp, "serial:", 7) == 0) { 2267 if (ca == NULL && !wild_ca) { 2268 fatal("revoking certificates by serial number " 2269 "requires specification of a CA key"); 2270 } 2271 cp += 7; 2272 cp = cp + strspn(cp, " \t"); 2273 errno = 0; 2274 serial = strtoull(cp, &ep, 0); 2275 if (*cp == '\0' || (*ep != '\0' && *ep != '-')) 2276 fatal("%s:%lu: invalid serial \"%s\"", 2277 path, lnum, cp); 2278 if (errno == ERANGE && serial == ULLONG_MAX) 2279 fatal("%s:%lu: serial out of range", 2280 path, lnum); 2281 serial2 = serial; 2282 if (*ep == '-') { 2283 cp = ep + 1; 2284 errno = 0; 2285 serial2 = strtoull(cp, &ep, 0); 2286 if (*cp == '\0' || *ep != '\0') 2287 fatal("%s:%lu: invalid serial \"%s\"", 2288 path, lnum, cp); 2289 if (errno == ERANGE && serial2 == ULLONG_MAX) 2290 fatal("%s:%lu: serial out of range", 2291 path, lnum); 2292 if (serial2 <= serial) 2293 fatal("%s:%lu: invalid serial range " 2294 "%llu:%llu", path, lnum, 2295 (unsigned long long)serial, 2296 (unsigned long long)serial2); 2297 } 2298 if (ssh_krl_revoke_cert_by_serial_range(krl, 2299 ca, serial, serial2) != 0) { 2300 fatal_f("revoke serial failed"); 2301 } 2302 } else if (strncasecmp(cp, "id:", 3) == 0) { 2303 if (ca == NULL && !wild_ca) { 2304 fatal("revoking certificates by key ID " 2305 "requires specification of a CA key"); 2306 } 2307 cp += 3; 2308 cp = cp + strspn(cp, " \t"); 2309 if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0) 2310 fatal_f("revoke key ID failed"); 2311 } else if (strncasecmp(cp, "hash:", 5) == 0) { 2312 cp += 5; 2313 cp = cp + strspn(cp, " \t"); 2314 hash_to_blob(cp, &blob, &blen, file, lnum); 2315 r = ssh_krl_revoke_key_sha256(krl, blob, blen); 2316 if (r != 0) 2317 fatal_fr(r, "revoke key failed"); 2318 } else { 2319 if (strncasecmp(cp, "key:", 4) == 0) { 2320 cp += 4; 2321 cp = cp + strspn(cp, " \t"); 2322 was_explicit_key = 1; 2323 } else if (strncasecmp(cp, "sha1:", 5) == 0) { 2324 cp += 5; 2325 cp = cp + strspn(cp, " \t"); 2326 was_sha1 = 1; 2327 } else if (strncasecmp(cp, "sha256:", 7) == 0) { 2328 cp += 7; 2329 cp = cp + strspn(cp, " \t"); 2330 was_sha256 = 1; 2331 /* 2332 * Just try to process the line as a key. 2333 * Parsing will fail if it isn't. 2334 */ 2335 } 2336 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 2337 fatal("sshkey_new"); 2338 if ((r = sshkey_read(key, &cp)) != 0) 2339 fatal_r(r, "%s:%lu: invalid key", path, lnum); 2340 if (was_explicit_key) 2341 r = ssh_krl_revoke_key_explicit(krl, key); 2342 else if (was_sha1) { 2343 if (sshkey_fingerprint_raw(key, 2344 SSH_DIGEST_SHA1, &blob, &blen) != 0) { 2345 fatal("%s:%lu: fingerprint failed", 2346 file, lnum); 2347 } 2348 r = ssh_krl_revoke_key_sha1(krl, blob, blen); 2349 } else if (was_sha256) { 2350 if (sshkey_fingerprint_raw(key, 2351 SSH_DIGEST_SHA256, &blob, &blen) != 0) { 2352 fatal("%s:%lu: fingerprint failed", 2353 file, lnum); 2354 } 2355 r = ssh_krl_revoke_key_sha256(krl, blob, blen); 2356 } else 2357 r = ssh_krl_revoke_key(krl, key); 2358 if (r != 0) 2359 fatal_fr(r, "revoke key failed"); 2360 freezero(blob, blen); 2361 blob = NULL; 2362 blen = 0; 2363 sshkey_free(key); 2364 } 2365 } 2366 if (strcmp(path, "-") != 0) 2367 fclose(krl_spec); 2368 free(line); 2369 free(path); 2370 } 2371 2372 static void 2373 do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path, 2374 unsigned long long krl_version, const char *krl_comment, 2375 int argc, char **argv) 2376 { 2377 struct ssh_krl *krl; 2378 struct stat sb; 2379 struct sshkey *ca = NULL; 2380 int i, r, wild_ca = 0; 2381 char *tmp; 2382 struct sshbuf *kbuf; 2383 2384 if (*identity_file == '\0') 2385 fatal("KRL generation requires an output file"); 2386 if (stat(identity_file, &sb) == -1) { 2387 if (errno != ENOENT) 2388 fatal("Cannot access KRL \"%s\": %s", 2389 identity_file, strerror(errno)); 2390 if (updating) 2391 fatal("KRL \"%s\" does not exist", identity_file); 2392 } 2393 if (ca_key_path != NULL) { 2394 if (strcasecmp(ca_key_path, "none") == 0) 2395 wild_ca = 1; 2396 else { 2397 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 2398 if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) 2399 fatal_r(r, "Cannot load CA public key %s", tmp); 2400 free(tmp); 2401 } 2402 } 2403 2404 if (updating) 2405 load_krl(identity_file, &krl); 2406 else if ((krl = ssh_krl_init()) == NULL) 2407 fatal("couldn't create KRL"); 2408 2409 if (krl_version != 0) 2410 ssh_krl_set_version(krl, krl_version); 2411 if (krl_comment != NULL) 2412 ssh_krl_set_comment(krl, krl_comment); 2413 2414 for (i = 0; i < argc; i++) 2415 update_krl_from_file(pw, argv[i], wild_ca, ca, krl); 2416 2417 if ((kbuf = sshbuf_new()) == NULL) 2418 fatal("sshbuf_new failed"); 2419 if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0) 2420 fatal("Couldn't generate KRL"); 2421 if ((r = sshbuf_write_file(identity_file, kbuf)) != 0) 2422 fatal("write %s: %s", identity_file, strerror(errno)); 2423 sshbuf_free(kbuf); 2424 ssh_krl_free(krl); 2425 sshkey_free(ca); 2426 } 2427 2428 static void 2429 do_check_krl(struct passwd *pw, int print_krl, int argc, char **argv) 2430 { 2431 int i, r, ret = 0; 2432 char *comment; 2433 struct ssh_krl *krl; 2434 struct sshkey *k; 2435 2436 if (*identity_file == '\0') 2437 fatal("KRL checking requires an input file"); 2438 load_krl(identity_file, &krl); 2439 if (print_krl) 2440 krl_dump(krl, stdout); 2441 for (i = 0; i < argc; i++) { 2442 if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0) 2443 fatal_r(r, "Cannot load public key %s", argv[i]); 2444 r = ssh_krl_check_key(krl, k); 2445 printf("%s%s%s%s: %s\n", argv[i], 2446 *comment ? " (" : "", comment, *comment ? ")" : "", 2447 r == 0 ? "ok" : "REVOKED"); 2448 if (r != 0) 2449 ret = 1; 2450 sshkey_free(k); 2451 free(comment); 2452 } 2453 ssh_krl_free(krl); 2454 exit(ret); 2455 } 2456 2457 static struct sshkey * 2458 load_sign_key(const char *keypath, const struct sshkey *pubkey) 2459 { 2460 size_t i, slen, plen = strlen(keypath); 2461 char *privpath = xstrdup(keypath); 2462 const char *suffixes[] = { "-cert.pub", ".pub", NULL }; 2463 struct sshkey *ret = NULL, *privkey = NULL; 2464 int r; 2465 2466 /* 2467 * If passed a public key filename, then try to locate the corresponding 2468 * private key. This lets us specify certificates on the command-line 2469 * and have ssh-keygen find the appropriate private key. 2470 */ 2471 for (i = 0; suffixes[i]; i++) { 2472 slen = strlen(suffixes[i]); 2473 if (plen <= slen || 2474 strcmp(privpath + plen - slen, suffixes[i]) != 0) 2475 continue; 2476 privpath[plen - slen] = '\0'; 2477 debug_f("%s looks like a public key, using private key " 2478 "path %s instead", keypath, privpath); 2479 } 2480 if ((privkey = load_identity(privpath, NULL)) == NULL) { 2481 error("Couldn't load identity %s", keypath); 2482 goto done; 2483 } 2484 if (!sshkey_equal_public(pubkey, privkey)) { 2485 error("Public key %s doesn't match private %s", 2486 keypath, privpath); 2487 goto done; 2488 } 2489 if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) { 2490 /* 2491 * Graft the certificate onto the private key to make 2492 * it capable of signing. 2493 */ 2494 if ((r = sshkey_to_certified(privkey)) != 0) { 2495 error_fr(r, "sshkey_to_certified"); 2496 goto done; 2497 } 2498 if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) { 2499 error_fr(r, "sshkey_cert_copy"); 2500 goto done; 2501 } 2502 } 2503 /* success */ 2504 ret = privkey; 2505 privkey = NULL; 2506 done: 2507 sshkey_free(privkey); 2508 free(privpath); 2509 return ret; 2510 } 2511 2512 static int 2513 sign_one(struct sshkey *signkey, const char *filename, int fd, 2514 const char *sig_namespace, sshsig_signer *signer, void *signer_ctx) 2515 { 2516 struct sshbuf *sigbuf = NULL, *abuf = NULL; 2517 int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno; 2518 char *wfile = NULL, *asig = NULL, *fp = NULL; 2519 char *pin = NULL, *prompt = NULL; 2520 2521 if (!quiet) { 2522 if (fd == STDIN_FILENO) 2523 fprintf(stderr, "Signing data on standard input\n"); 2524 else 2525 fprintf(stderr, "Signing file %s\n", filename); 2526 } 2527 if (signer == NULL && sshkey_is_sk(signkey)) { 2528 if ((signkey->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) { 2529 xasprintf(&prompt, "Enter PIN for %s key: ", 2530 sshkey_type(signkey)); 2531 if ((pin = read_passphrase(prompt, 2532 RP_ALLOW_STDIN)) == NULL) 2533 fatal_f("couldn't read PIN"); 2534 } 2535 if ((signkey->sk_flags & SSH_SK_USER_PRESENCE_REQD)) { 2536 if ((fp = sshkey_fingerprint(signkey, fingerprint_hash, 2537 SSH_FP_DEFAULT)) == NULL) 2538 fatal_f("fingerprint failed"); 2539 fprintf(stderr, "Confirm user presence for key %s %s\n", 2540 sshkey_type(signkey), fp); 2541 free(fp); 2542 } 2543 } 2544 if ((r = sshsig_sign_fd(signkey, NULL, sk_provider, pin, 2545 fd, sig_namespace, &sigbuf, signer, signer_ctx)) != 0) { 2546 error_r(r, "Signing %s failed", filename); 2547 goto out; 2548 } 2549 if ((r = sshsig_armor(sigbuf, &abuf)) != 0) { 2550 error_fr(r, "sshsig_armor"); 2551 goto out; 2552 } 2553 if ((asig = sshbuf_dup_string(abuf)) == NULL) { 2554 error_f("buffer error"); 2555 r = SSH_ERR_ALLOC_FAIL; 2556 goto out; 2557 } 2558 2559 if (fd == STDIN_FILENO) { 2560 fputs(asig, stdout); 2561 fflush(stdout); 2562 } else { 2563 xasprintf(&wfile, "%s.sig", filename); 2564 if (confirm_overwrite(wfile)) { 2565 if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC, 2566 0666)) == -1) { 2567 oerrno = errno; 2568 error("Cannot open %s: %s", 2569 wfile, strerror(errno)); 2570 errno = oerrno; 2571 r = SSH_ERR_SYSTEM_ERROR; 2572 goto out; 2573 } 2574 if (atomicio(vwrite, wfd, asig, 2575 strlen(asig)) != strlen(asig)) { 2576 oerrno = errno; 2577 error("Cannot write to %s: %s", 2578 wfile, strerror(errno)); 2579 errno = oerrno; 2580 r = SSH_ERR_SYSTEM_ERROR; 2581 goto out; 2582 } 2583 if (!quiet) { 2584 fprintf(stderr, "Write signature to %s\n", 2585 wfile); 2586 } 2587 } 2588 } 2589 /* success */ 2590 r = 0; 2591 out: 2592 free(wfile); 2593 free(prompt); 2594 free(asig); 2595 if (pin != NULL) 2596 freezero(pin, strlen(pin)); 2597 sshbuf_free(abuf); 2598 sshbuf_free(sigbuf); 2599 if (wfd != -1) 2600 close(wfd); 2601 return r; 2602 } 2603 2604 static int 2605 sig_sign(const char *keypath, const char *sig_namespace, int argc, char **argv) 2606 { 2607 int i, fd = -1, r, ret = -1; 2608 int agent_fd = -1; 2609 struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL; 2610 sshsig_signer *signer = NULL; 2611 2612 /* Check file arguments. */ 2613 for (i = 0; i < argc; i++) { 2614 if (strcmp(argv[i], "-") != 0) 2615 continue; 2616 if (i > 0 || argc > 1) 2617 fatal("Cannot sign mix of paths and standard input"); 2618 } 2619 2620 if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) { 2621 error_r(r, "Couldn't load public key %s", keypath); 2622 goto done; 2623 } 2624 2625 if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) 2626 debug_r(r, "Couldn't get agent socket"); 2627 else { 2628 if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0) 2629 signer = agent_signer; 2630 else 2631 debug_r(r, "Couldn't find key in agent"); 2632 } 2633 2634 if (signer == NULL) { 2635 /* Not using agent - try to load private key */ 2636 if ((privkey = load_sign_key(keypath, pubkey)) == NULL) 2637 goto done; 2638 signkey = privkey; 2639 } else { 2640 /* Will use key in agent */ 2641 signkey = pubkey; 2642 } 2643 2644 if (argc == 0) { 2645 if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO, 2646 sig_namespace, signer, &agent_fd)) != 0) 2647 goto done; 2648 } else { 2649 for (i = 0; i < argc; i++) { 2650 if (strcmp(argv[i], "-") == 0) 2651 fd = STDIN_FILENO; 2652 else if ((fd = open(argv[i], O_RDONLY)) == -1) { 2653 error("Cannot open %s for signing: %s", 2654 argv[i], strerror(errno)); 2655 goto done; 2656 } 2657 if ((r = sign_one(signkey, argv[i], fd, sig_namespace, 2658 signer, &agent_fd)) != 0) 2659 goto done; 2660 if (fd != STDIN_FILENO) 2661 close(fd); 2662 fd = -1; 2663 } 2664 } 2665 2666 ret = 0; 2667 done: 2668 if (fd != -1 && fd != STDIN_FILENO) 2669 close(fd); 2670 sshkey_free(pubkey); 2671 sshkey_free(privkey); 2672 return ret; 2673 } 2674 2675 static int 2676 sig_process_opts(char * const *opts, size_t nopts, uint64_t *verify_timep, 2677 int *print_pubkey) 2678 { 2679 size_t i; 2680 time_t now; 2681 2682 *verify_timep = 0; 2683 if (print_pubkey != NULL) 2684 *print_pubkey = 0; 2685 for (i = 0; i < nopts; i++) { 2686 if (strncasecmp(opts[i], "verify-time=", 12) == 0) { 2687 if (parse_absolute_time(opts[i] + 12, 2688 verify_timep) != 0 || *verify_timep == 0) { 2689 error("Invalid \"verify-time\" option"); 2690 return SSH_ERR_INVALID_ARGUMENT; 2691 } 2692 } else if (print_pubkey && 2693 strcasecmp(opts[i], "print-pubkey") == 0) { 2694 *print_pubkey = 1; 2695 } else { 2696 error("Invalid option \"%s\"", opts[i]); 2697 return SSH_ERR_INVALID_ARGUMENT; 2698 } 2699 } 2700 if (*verify_timep == 0) { 2701 if ((now = time(NULL)) < 0) { 2702 error("Time is before epoch"); 2703 return SSH_ERR_INVALID_ARGUMENT; 2704 } 2705 *verify_timep = (uint64_t)now; 2706 } 2707 return 0; 2708 } 2709 2710 static int 2711 sig_verify(const char *signature, const char *sig_namespace, 2712 const char *principal, const char *allowed_keys, const char *revoked_keys, 2713 char * const *opts, size_t nopts) 2714 { 2715 int r, ret = -1; 2716 int print_pubkey = 0; 2717 struct sshbuf *sigbuf = NULL, *abuf = NULL; 2718 struct sshkey *sign_key = NULL; 2719 char *fp = NULL; 2720 struct sshkey_sig_details *sig_details = NULL; 2721 uint64_t verify_time = 0; 2722 2723 if (sig_process_opts(opts, nopts, &verify_time, &print_pubkey) != 0) 2724 goto done; /* error already logged */ 2725 2726 memset(&sig_details, 0, sizeof(sig_details)); 2727 if ((r = sshbuf_load_file(signature, &abuf)) != 0) { 2728 error_r(r, "Couldn't read signature file"); 2729 goto done; 2730 } 2731 2732 if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) { 2733 error_fr(r, "sshsig_armor"); 2734 goto done; 2735 } 2736 if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace, 2737 &sign_key, &sig_details)) != 0) 2738 goto done; /* sshsig_verify() prints error */ 2739 2740 if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash, 2741 SSH_FP_DEFAULT)) == NULL) 2742 fatal_f("sshkey_fingerprint failed"); 2743 debug("Valid (unverified) signature from key %s", fp); 2744 if (sig_details != NULL) { 2745 debug2_f("signature details: counter = %u, flags = 0x%02x", 2746 sig_details->sk_counter, sig_details->sk_flags); 2747 } 2748 free(fp); 2749 fp = NULL; 2750 2751 if (revoked_keys != NULL) { 2752 if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) { 2753 debug3_fr(r, "sshkey_check_revoked"); 2754 goto done; 2755 } 2756 } 2757 2758 if (allowed_keys != NULL && (r = sshsig_check_allowed_keys(allowed_keys, 2759 sign_key, principal, sig_namespace, verify_time)) != 0) { 2760 debug3_fr(r, "sshsig_check_allowed_keys"); 2761 goto done; 2762 } 2763 /* success */ 2764 ret = 0; 2765 done: 2766 if (!quiet) { 2767 if (ret == 0) { 2768 if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash, 2769 SSH_FP_DEFAULT)) == NULL) 2770 fatal_f("sshkey_fingerprint failed"); 2771 if (principal == NULL) { 2772 printf("Good \"%s\" signature with %s key %s\n", 2773 sig_namespace, sshkey_type(sign_key), fp); 2774 2775 } else { 2776 printf("Good \"%s\" signature for %s with %s key %s\n", 2777 sig_namespace, principal, 2778 sshkey_type(sign_key), fp); 2779 } 2780 } else { 2781 printf("Could not verify signature.\n"); 2782 } 2783 } 2784 /* Print the signature key if requested */ 2785 if (ret == 0 && print_pubkey && sign_key != NULL) { 2786 if ((r = sshkey_write(sign_key, stdout)) == 0) 2787 fputc('\n', stdout); 2788 else { 2789 error_r(r, "Could not print public key.\n"); 2790 ret = -1; 2791 } 2792 } 2793 sshbuf_free(sigbuf); 2794 sshbuf_free(abuf); 2795 sshkey_free(sign_key); 2796 sshkey_sig_details_free(sig_details); 2797 free(fp); 2798 return ret; 2799 } 2800 2801 static int 2802 sig_find_principals(const char *signature, const char *allowed_keys, 2803 char * const *opts, size_t nopts) 2804 { 2805 int r, ret = -1; 2806 struct sshbuf *sigbuf = NULL, *abuf = NULL; 2807 struct sshkey *sign_key = NULL; 2808 char *principals = NULL, *cp, *tmp; 2809 uint64_t verify_time = 0; 2810 2811 if (sig_process_opts(opts, nopts, &verify_time, NULL) != 0) 2812 goto done; /* error already logged */ 2813 2814 if ((r = sshbuf_load_file(signature, &abuf)) != 0) { 2815 error_r(r, "Couldn't read signature file"); 2816 goto done; 2817 } 2818 if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) { 2819 error_fr(r, "sshsig_armor"); 2820 goto done; 2821 } 2822 if ((r = sshsig_get_pubkey(sigbuf, &sign_key)) != 0) { 2823 error_fr(r, "sshsig_get_pubkey"); 2824 goto done; 2825 } 2826 if ((r = sshsig_find_principals(allowed_keys, sign_key, 2827 verify_time, &principals)) != 0) { 2828 if (r != SSH_ERR_KEY_NOT_FOUND) 2829 error_fr(r, "sshsig_find_principal"); 2830 goto done; 2831 } 2832 ret = 0; 2833 done: 2834 if (ret == 0 ) { 2835 /* Emit matching principals one per line */ 2836 tmp = principals; 2837 while ((cp = strsep(&tmp, ",")) != NULL && *cp != '\0') 2838 puts(cp); 2839 } else { 2840 fprintf(stderr, "No principal matched.\n"); 2841 } 2842 sshbuf_free(sigbuf); 2843 sshbuf_free(abuf); 2844 sshkey_free(sign_key); 2845 free(principals); 2846 return ret; 2847 } 2848 2849 static void 2850 do_moduli_gen(const char *out_file, char **opts, size_t nopts) 2851 { 2852 #ifdef WITH_OPENSSL 2853 /* Moduli generation/screening */ 2854 u_int32_t memory = 0; 2855 BIGNUM *start = NULL; 2856 int moduli_bits = 0; 2857 FILE *out; 2858 size_t i; 2859 const char *errstr; 2860 2861 /* Parse options */ 2862 for (i = 0; i < nopts; i++) { 2863 if (strncmp(opts[i], "memory=", 7) == 0) { 2864 memory = (u_int32_t)strtonum(opts[i]+7, 1, 2865 UINT_MAX, &errstr); 2866 if (errstr) { 2867 fatal("Memory limit is %s: %s", 2868 errstr, opts[i]+7); 2869 } 2870 } else if (strncmp(opts[i], "start=", 6) == 0) { 2871 /* XXX - also compare length against bits */ 2872 if (BN_hex2bn(&start, opts[i]+6) == 0) 2873 fatal("Invalid start point."); 2874 } else if (strncmp(opts[i], "bits=", 5) == 0) { 2875 moduli_bits = (int)strtonum(opts[i]+5, 1, 2876 INT_MAX, &errstr); 2877 if (errstr) { 2878 fatal("Invalid number: %s (%s)", 2879 opts[i]+12, errstr); 2880 } 2881 } else { 2882 fatal("Option \"%s\" is unsupported for moduli " 2883 "generation", opts[i]); 2884 } 2885 } 2886 2887 if ((out = fopen(out_file, "w")) == NULL) { 2888 fatal("Couldn't open modulus candidate file \"%s\": %s", 2889 out_file, strerror(errno)); 2890 } 2891 setvbuf(out, NULL, _IOLBF, 0); 2892 2893 if (moduli_bits == 0) 2894 moduli_bits = DEFAULT_BITS; 2895 if (gen_candidates(out, memory, moduli_bits, start) != 0) 2896 fatal("modulus candidate generation failed"); 2897 #else /* WITH_OPENSSL */ 2898 fatal("Moduli generation is not supported"); 2899 #endif /* WITH_OPENSSL */ 2900 } 2901 2902 static void 2903 do_moduli_screen(const char *out_file, char **opts, size_t nopts) 2904 { 2905 #ifdef WITH_OPENSSL 2906 /* Moduli generation/screening */ 2907 char *checkpoint = NULL; 2908 u_int32_t generator_wanted = 0; 2909 unsigned long start_lineno = 0, lines_to_process = 0; 2910 int prime_tests = 0; 2911 FILE *out, *in = stdin; 2912 size_t i; 2913 const char *errstr; 2914 2915 /* Parse options */ 2916 for (i = 0; i < nopts; i++) { 2917 if (strncmp(opts[i], "lines=", 6) == 0) { 2918 lines_to_process = strtoul(opts[i]+6, NULL, 10); 2919 } else if (strncmp(opts[i], "start-line=", 11) == 0) { 2920 start_lineno = strtoul(opts[i]+11, NULL, 10); 2921 } else if (strncmp(opts[i], "checkpoint=", 11) == 0) { 2922 checkpoint = xstrdup(opts[i]+11); 2923 } else if (strncmp(opts[i], "generator=", 10) == 0) { 2924 generator_wanted = (u_int32_t)strtonum( 2925 opts[i]+10, 1, UINT_MAX, &errstr); 2926 if (errstr != NULL) { 2927 fatal("Generator invalid: %s (%s)", 2928 opts[i]+10, errstr); 2929 } 2930 } else if (strncmp(opts[i], "prime-tests=", 12) == 0) { 2931 prime_tests = (int)strtonum(opts[i]+12, 1, 2932 INT_MAX, &errstr); 2933 if (errstr) { 2934 fatal("Invalid number: %s (%s)", 2935 opts[i]+12, errstr); 2936 } 2937 } else { 2938 fatal("Option \"%s\" is unsupported for moduli " 2939 "screening", opts[i]); 2940 } 2941 } 2942 2943 if (have_identity && strcmp(identity_file, "-") != 0) { 2944 if ((in = fopen(identity_file, "r")) == NULL) { 2945 fatal("Couldn't open modulus candidate " 2946 "file \"%s\": %s", identity_file, 2947 strerror(errno)); 2948 } 2949 } 2950 2951 if ((out = fopen(out_file, "a")) == NULL) { 2952 fatal("Couldn't open moduli file \"%s\": %s", 2953 out_file, strerror(errno)); 2954 } 2955 setvbuf(out, NULL, _IOLBF, 0); 2956 if (prime_test(in, out, prime_tests == 0 ? 100 : prime_tests, 2957 generator_wanted, checkpoint, 2958 start_lineno, lines_to_process) != 0) 2959 fatal("modulus screening failed"); 2960 #else /* WITH_OPENSSL */ 2961 fatal("Moduli screening is not supported"); 2962 #endif /* WITH_OPENSSL */ 2963 } 2964 2965 static char * 2966 private_key_passphrase(void) 2967 { 2968 char *passphrase1, *passphrase2; 2969 2970 /* Ask for a passphrase (twice). */ 2971 if (identity_passphrase) 2972 passphrase1 = xstrdup(identity_passphrase); 2973 else if (identity_new_passphrase) 2974 passphrase1 = xstrdup(identity_new_passphrase); 2975 else { 2976 passphrase_again: 2977 passphrase1 = 2978 read_passphrase("Enter passphrase (empty for no " 2979 "passphrase): ", RP_ALLOW_STDIN); 2980 passphrase2 = read_passphrase("Enter same passphrase again: ", 2981 RP_ALLOW_STDIN); 2982 if (strcmp(passphrase1, passphrase2) != 0) { 2983 /* 2984 * The passphrases do not match. Clear them and 2985 * retry. 2986 */ 2987 freezero(passphrase1, strlen(passphrase1)); 2988 freezero(passphrase2, strlen(passphrase2)); 2989 printf("Passphrases do not match. Try again.\n"); 2990 goto passphrase_again; 2991 } 2992 /* Clear the other copy of the passphrase. */ 2993 freezero(passphrase2, strlen(passphrase2)); 2994 } 2995 return passphrase1; 2996 } 2997 2998 static const char * 2999 skip_ssh_url_preamble(const char *s) 3000 { 3001 if (strncmp(s, "ssh://", 6) == 0) 3002 return s + 6; 3003 else if (strncmp(s, "ssh:", 4) == 0) 3004 return s + 4; 3005 return s; 3006 } 3007 3008 static int 3009 do_download_sk(const char *skprovider, const char *device) 3010 { 3011 struct sshkey **keys; 3012 size_t nkeys, i; 3013 int r, ret = -1; 3014 char *fp, *pin = NULL, *pass = NULL, *path, *pubpath; 3015 const char *ext; 3016 3017 if (skprovider == NULL) 3018 fatal("Cannot download keys without provider"); 3019 3020 pin = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN); 3021 if (!quiet) { 3022 printf("You may need to touch your authenticator " 3023 "to authorize key download.\n"); 3024 } 3025 if ((r = sshsk_load_resident(skprovider, device, pin, 3026 &keys, &nkeys)) != 0) { 3027 if (pin != NULL) 3028 freezero(pin, strlen(pin)); 3029 error_r(r, "Unable to load resident keys"); 3030 return -1; 3031 } 3032 if (nkeys == 0) 3033 logit("No keys to download"); 3034 if (pin != NULL) 3035 freezero(pin, strlen(pin)); 3036 3037 for (i = 0; i < nkeys; i++) { 3038 if (keys[i]->type != KEY_ECDSA_SK && 3039 keys[i]->type != KEY_ED25519_SK) { 3040 error("Unsupported key type %s (%d)", 3041 sshkey_type(keys[i]), keys[i]->type); 3042 continue; 3043 } 3044 if ((fp = sshkey_fingerprint(keys[i], 3045 fingerprint_hash, SSH_FP_DEFAULT)) == NULL) 3046 fatal_f("sshkey_fingerprint failed"); 3047 debug_f("key %zu: %s %s %s (flags 0x%02x)", i, 3048 sshkey_type(keys[i]), fp, keys[i]->sk_application, 3049 keys[i]->sk_flags); 3050 ext = skip_ssh_url_preamble(keys[i]->sk_application); 3051 xasprintf(&path, "id_%s_rk%s%s", 3052 keys[i]->type == KEY_ECDSA_SK ? "ecdsa_sk" : "ed25519_sk", 3053 *ext == '\0' ? "" : "_", ext); 3054 3055 /* If the file already exists, ask the user to confirm. */ 3056 if (!confirm_overwrite(path)) { 3057 free(path); 3058 break; 3059 } 3060 3061 /* Save the key with the application string as the comment */ 3062 if (pass == NULL) 3063 pass = private_key_passphrase(); 3064 if ((r = sshkey_save_private(keys[i], path, pass, 3065 keys[i]->sk_application, private_key_format, 3066 openssh_format_cipher, rounds)) != 0) { 3067 error_r(r, "Saving key \"%s\" failed", path); 3068 free(path); 3069 break; 3070 } 3071 if (!quiet) { 3072 printf("Saved %s key%s%s to %s\n", 3073 sshkey_type(keys[i]), 3074 *ext != '\0' ? " " : "", 3075 *ext != '\0' ? keys[i]->sk_application : "", 3076 path); 3077 } 3078 3079 /* Save public key too */ 3080 xasprintf(&pubpath, "%s.pub", path); 3081 free(path); 3082 if ((r = sshkey_save_public(keys[i], pubpath, 3083 keys[i]->sk_application)) != 0) { 3084 error_r(r, "Saving public key \"%s\" failed", pubpath); 3085 free(pubpath); 3086 break; 3087 } 3088 free(pubpath); 3089 } 3090 3091 if (i >= nkeys) 3092 ret = 0; /* success */ 3093 if (pass != NULL) 3094 freezero(pass, strlen(pass)); 3095 for (i = 0; i < nkeys; i++) 3096 sshkey_free(keys[i]); 3097 free(keys); 3098 return ret; 3099 } 3100 3101 static void 3102 save_attestation(struct sshbuf *attest, const char *path) 3103 { 3104 mode_t omask; 3105 int r; 3106 3107 if (path == NULL) 3108 return; /* nothing to do */ 3109 if (attest == NULL || sshbuf_len(attest) == 0) 3110 fatal("Enrollment did not return attestation data"); 3111 omask = umask(077); 3112 r = sshbuf_write_file(path, attest); 3113 umask(omask); 3114 if (r != 0) 3115 fatal_r(r, "Unable to write attestation data \"%s\"", path); 3116 if (!quiet) 3117 printf("Your FIDO attestation certificate has been saved in " 3118 "%s\n", path); 3119 } 3120 3121 static void 3122 usage(void) 3123 { 3124 fprintf(stderr, 3125 "usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]\n" 3126 " [-m format] [-N new_passphrase] [-O option]\n" 3127 " [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]\n" 3128 " [-w provider] [-Z cipher]\n" 3129 " ssh-keygen -p [-a rounds] [-f keyfile] [-m format] [-N new_passphrase]\n" 3130 " [-P old_passphrase] [-Z cipher]\n" 3131 #ifdef WITH_OPENSSL 3132 " ssh-keygen -i [-f input_keyfile] [-m key_format]\n" 3133 " ssh-keygen -e [-f input_keyfile] [-m key_format]\n" 3134 #endif 3135 " ssh-keygen -y [-f input_keyfile]\n" 3136 " ssh-keygen -c [-a rounds] [-C comment] [-f keyfile] [-P passphrase]\n" 3137 " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n" 3138 " ssh-keygen -B [-f input_keyfile]\n"); 3139 #ifdef ENABLE_PKCS11 3140 fprintf(stderr, 3141 " ssh-keygen -D pkcs11\n"); 3142 #endif 3143 fprintf(stderr, 3144 " ssh-keygen -F hostname [-lv] [-f known_hosts_file]\n" 3145 " ssh-keygen -H [-f known_hosts_file]\n" 3146 " ssh-keygen -K [-a rounds] [-w provider]\n" 3147 " ssh-keygen -R hostname [-f known_hosts_file]\n" 3148 " ssh-keygen -r hostname [-g] [-f input_keyfile]\n" 3149 #ifdef WITH_OPENSSL 3150 " ssh-keygen -M generate [-O option] output_file\n" 3151 " ssh-keygen -M screen [-f input_file] [-O option] output_file\n" 3152 #endif 3153 " ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]\n" 3154 " [-n principals] [-O option] [-V validity_interval]\n" 3155 " [-z serial_number] file ...\n" 3156 " ssh-keygen -L [-f input_keyfile]\n" 3157 " ssh-keygen -A [-a rounds] [-f prefix_path]\n" 3158 " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n" 3159 " file ...\n" 3160 " ssh-keygen -Q [-l] -f krl_file [file ...]\n" 3161 " ssh-keygen -Y find-principals -s signature_file -f allowed_signers_file\n" 3162 " ssh-keygen -Y check-novalidate -n namespace -s signature_file\n" 3163 " ssh-keygen -Y sign -f key_file -n namespace file ...\n" 3164 " ssh-keygen -Y verify -f allowed_signers_file -I signer_identity\n" 3165 " -n namespace -s signature_file [-r revocation_file]\n"); 3166 exit(1); 3167 } 3168 3169 /* 3170 * Main program for key management. 3171 */ 3172 int 3173 main(int argc, char **argv) 3174 { 3175 char comment[1024], *passphrase; 3176 char *rr_hostname = NULL, *ep, *fp, *ra; 3177 struct sshkey *private, *public; 3178 struct passwd *pw; 3179 int r, opt, type; 3180 int change_passphrase = 0, change_comment = 0, show_cert = 0; 3181 int find_host = 0, delete_host = 0, hash_hosts = 0; 3182 int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0; 3183 int prefer_agent = 0, convert_to = 0, convert_from = 0; 3184 int print_public = 0, print_generic = 0, cert_serial_autoinc = 0; 3185 int do_gen_candidates = 0, do_screen_candidates = 0, download_sk = 0; 3186 unsigned long long cert_serial = 0; 3187 char *identity_comment = NULL, *ca_key_path = NULL, **opts = NULL; 3188 char *sk_application = NULL, *sk_device = NULL, *sk_user = NULL; 3189 char *sk_attestation_path = NULL; 3190 struct sshbuf *challenge = NULL, *attest = NULL; 3191 size_t i, nopts = 0; 3192 u_int32_t bits = 0; 3193 uint8_t sk_flags = SSH_SK_USER_PRESENCE_REQD; 3194 const char *errstr; 3195 int log_level = SYSLOG_LEVEL_INFO; 3196 char *sign_op = NULL; 3197 3198 extern int optind; 3199 extern char *optarg; 3200 3201 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 3202 sanitise_stdfd(); 3203 3204 __progname = ssh_get_progname(argv[0]); 3205 3206 seed_rng(); 3207 3208 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); 3209 3210 msetlocale(); 3211 3212 /* we need this for the home * directory. */ 3213 pw = getpwuid(getuid()); 3214 if (!pw) 3215 fatal("No user exists for uid %lu", (u_long)getuid()); 3216 pw = pwcopy(pw); 3217 if (gethostname(hostname, sizeof(hostname)) == -1) 3218 fatal("gethostname: %s", strerror(errno)); 3219 3220 sk_provider = getenv("SSH_SK_PROVIDER"); 3221 3222 /* Remaining characters: dGjJSTWx */ 3223 while ((opt = getopt(argc, argv, "ABHKLQUXceghiklopquvy" 3224 "C:D:E:F:I:M:N:O:P:R:V:Y:Z:" 3225 "a:b:f:g:m:n:r:s:t:w:z:")) != -1) { 3226 switch (opt) { 3227 case 'A': 3228 gen_all_hostkeys = 1; 3229 break; 3230 case 'b': 3231 bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX, 3232 &errstr); 3233 if (errstr) 3234 fatal("Bits has bad value %s (%s)", 3235 optarg, errstr); 3236 break; 3237 case 'E': 3238 fingerprint_hash = ssh_digest_alg_by_name(optarg); 3239 if (fingerprint_hash == -1) 3240 fatal("Invalid hash algorithm \"%s\"", optarg); 3241 break; 3242 case 'F': 3243 find_host = 1; 3244 rr_hostname = optarg; 3245 break; 3246 case 'H': 3247 hash_hosts = 1; 3248 break; 3249 case 'I': 3250 cert_key_id = optarg; 3251 break; 3252 case 'R': 3253 delete_host = 1; 3254 rr_hostname = optarg; 3255 break; 3256 case 'L': 3257 show_cert = 1; 3258 break; 3259 case 'l': 3260 print_fingerprint = 1; 3261 break; 3262 case 'B': 3263 print_bubblebabble = 1; 3264 break; 3265 case 'm': 3266 if (strcasecmp(optarg, "RFC4716") == 0 || 3267 strcasecmp(optarg, "ssh2") == 0) { 3268 convert_format = FMT_RFC4716; 3269 break; 3270 } 3271 if (strcasecmp(optarg, "PKCS8") == 0) { 3272 convert_format = FMT_PKCS8; 3273 private_key_format = SSHKEY_PRIVATE_PKCS8; 3274 break; 3275 } 3276 if (strcasecmp(optarg, "PEM") == 0) { 3277 convert_format = FMT_PEM; 3278 private_key_format = SSHKEY_PRIVATE_PEM; 3279 break; 3280 } 3281 fatal("Unsupported conversion format \"%s\"", optarg); 3282 case 'n': 3283 cert_principals = optarg; 3284 break; 3285 case 'o': 3286 /* no-op; new format is already the default */ 3287 break; 3288 case 'p': 3289 change_passphrase = 1; 3290 break; 3291 case 'c': 3292 change_comment = 1; 3293 break; 3294 case 'f': 3295 if (strlcpy(identity_file, optarg, 3296 sizeof(identity_file)) >= sizeof(identity_file)) 3297 fatal("Identity filename too long"); 3298 have_identity = 1; 3299 break; 3300 case 'g': 3301 print_generic = 1; 3302 break; 3303 case 'K': 3304 download_sk = 1; 3305 break; 3306 case 'P': 3307 identity_passphrase = optarg; 3308 break; 3309 case 'N': 3310 identity_new_passphrase = optarg; 3311 break; 3312 case 'Q': 3313 check_krl = 1; 3314 break; 3315 case 'O': 3316 opts = xrecallocarray(opts, nopts, nopts + 1, 3317 sizeof(*opts)); 3318 opts[nopts++] = xstrdup(optarg); 3319 break; 3320 case 'Z': 3321 openssh_format_cipher = optarg; 3322 if (cipher_by_name(openssh_format_cipher) == NULL) 3323 fatal("Invalid OpenSSH-format cipher '%s'", 3324 openssh_format_cipher); 3325 break; 3326 case 'C': 3327 identity_comment = optarg; 3328 break; 3329 case 'q': 3330 quiet = 1; 3331 break; 3332 case 'e': 3333 /* export key */ 3334 convert_to = 1; 3335 break; 3336 case 'h': 3337 cert_key_type = SSH2_CERT_TYPE_HOST; 3338 certflags_flags = 0; 3339 break; 3340 case 'k': 3341 gen_krl = 1; 3342 break; 3343 case 'i': 3344 case 'X': 3345 /* import key */ 3346 convert_from = 1; 3347 break; 3348 case 'y': 3349 print_public = 1; 3350 break; 3351 case 's': 3352 ca_key_path = optarg; 3353 break; 3354 case 't': 3355 key_type_name = optarg; 3356 break; 3357 case 'D': 3358 pkcs11provider = optarg; 3359 break; 3360 case 'U': 3361 prefer_agent = 1; 3362 break; 3363 case 'u': 3364 update_krl = 1; 3365 break; 3366 case 'v': 3367 if (log_level == SYSLOG_LEVEL_INFO) 3368 log_level = SYSLOG_LEVEL_DEBUG1; 3369 else { 3370 if (log_level >= SYSLOG_LEVEL_DEBUG1 && 3371 log_level < SYSLOG_LEVEL_DEBUG3) 3372 log_level++; 3373 } 3374 break; 3375 case 'r': 3376 rr_hostname = optarg; 3377 break; 3378 case 'a': 3379 rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr); 3380 if (errstr) 3381 fatal("Invalid number: %s (%s)", 3382 optarg, errstr); 3383 break; 3384 case 'V': 3385 parse_cert_times(optarg); 3386 break; 3387 case 'Y': 3388 sign_op = optarg; 3389 break; 3390 case 'w': 3391 sk_provider = optarg; 3392 break; 3393 case 'z': 3394 errno = 0; 3395 if (*optarg == '+') { 3396 cert_serial_autoinc = 1; 3397 optarg++; 3398 } 3399 cert_serial = strtoull(optarg, &ep, 10); 3400 if (*optarg < '0' || *optarg > '9' || *ep != '\0' || 3401 (errno == ERANGE && cert_serial == ULLONG_MAX)) 3402 fatal("Invalid serial number \"%s\"", optarg); 3403 break; 3404 case 'M': 3405 if (strcmp(optarg, "generate") == 0) 3406 do_gen_candidates = 1; 3407 else if (strcmp(optarg, "screen") == 0) 3408 do_screen_candidates = 1; 3409 else 3410 fatal("Unsupported moduli option %s", optarg); 3411 break; 3412 case '?': 3413 default: 3414 usage(); 3415 } 3416 } 3417 3418 #ifdef ENABLE_SK_INTERNAL 3419 if (sk_provider == NULL) 3420 sk_provider = "internal"; 3421 #endif 3422 3423 /* reinit */ 3424 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); 3425 3426 argv += optind; 3427 argc -= optind; 3428 3429 if (sign_op != NULL) { 3430 if (strncmp(sign_op, "find-principals", 15) == 0) { 3431 if (ca_key_path == NULL) { 3432 error("Too few arguments for find-principals:" 3433 "missing signature file"); 3434 exit(1); 3435 } 3436 if (!have_identity) { 3437 error("Too few arguments for find-principals:" 3438 "missing allowed keys file"); 3439 exit(1); 3440 } 3441 return sig_find_principals(ca_key_path, identity_file, 3442 opts, nopts); 3443 } else if (strncmp(sign_op, "sign", 4) == 0) { 3444 if (cert_principals == NULL || 3445 *cert_principals == '\0') { 3446 error("Too few arguments for sign: " 3447 "missing namespace"); 3448 exit(1); 3449 } 3450 if (!have_identity) { 3451 error("Too few arguments for sign: " 3452 "missing key"); 3453 exit(1); 3454 } 3455 return sig_sign(identity_file, cert_principals, 3456 argc, argv); 3457 } else if (strncmp(sign_op, "check-novalidate", 16) == 0) { 3458 if (ca_key_path == NULL) { 3459 error("Too few arguments for check-novalidate: " 3460 "missing signature file"); 3461 exit(1); 3462 } 3463 return sig_verify(ca_key_path, cert_principals, 3464 NULL, NULL, NULL, opts, nopts); 3465 } else if (strncmp(sign_op, "verify", 6) == 0) { 3466 if (cert_principals == NULL || 3467 *cert_principals == '\0') { 3468 error("Too few arguments for verify: " 3469 "missing namespace"); 3470 exit(1); 3471 } 3472 if (ca_key_path == NULL) { 3473 error("Too few arguments for verify: " 3474 "missing signature file"); 3475 exit(1); 3476 } 3477 if (!have_identity) { 3478 error("Too few arguments for sign: " 3479 "missing allowed keys file"); 3480 exit(1); 3481 } 3482 if (cert_key_id == NULL) { 3483 error("Too few arguments for verify: " 3484 "missing principal ID"); 3485 exit(1); 3486 } 3487 return sig_verify(ca_key_path, cert_principals, 3488 cert_key_id, identity_file, rr_hostname, 3489 opts, nopts); 3490 } 3491 error("Unsupported operation for -Y: \"%s\"", sign_op); 3492 usage(); 3493 /* NOTREACHED */ 3494 } 3495 3496 if (ca_key_path != NULL) { 3497 if (argc < 1 && !gen_krl) { 3498 error("Too few arguments."); 3499 usage(); 3500 } 3501 } else if (argc > 0 && !gen_krl && !check_krl && 3502 !do_gen_candidates && !do_screen_candidates) { 3503 error("Too many arguments."); 3504 usage(); 3505 } 3506 if (change_passphrase && change_comment) { 3507 error("Can only have one of -p and -c."); 3508 usage(); 3509 } 3510 if (print_fingerprint && (delete_host || hash_hosts)) { 3511 error("Cannot use -l with -H or -R."); 3512 usage(); 3513 } 3514 if (gen_krl) { 3515 do_gen_krl(pw, update_krl, ca_key_path, 3516 cert_serial, identity_comment, argc, argv); 3517 return (0); 3518 } 3519 if (check_krl) { 3520 do_check_krl(pw, print_fingerprint, argc, argv); 3521 return (0); 3522 } 3523 if (ca_key_path != NULL) { 3524 if (cert_key_id == NULL) 3525 fatal("Must specify key id (-I) when certifying"); 3526 for (i = 0; i < nopts; i++) 3527 add_cert_option(opts[i]); 3528 do_ca_sign(pw, ca_key_path, prefer_agent, 3529 cert_serial, cert_serial_autoinc, argc, argv); 3530 } 3531 if (show_cert) 3532 do_show_cert(pw); 3533 if (delete_host || hash_hosts || find_host) { 3534 do_known_hosts(pw, rr_hostname, find_host, 3535 delete_host, hash_hosts); 3536 } 3537 if (pkcs11provider != NULL) 3538 do_download(pw); 3539 if (download_sk) { 3540 for (i = 0; i < nopts; i++) { 3541 if (strncasecmp(opts[i], "device=", 7) == 0) { 3542 sk_device = xstrdup(opts[i] + 7); 3543 } else { 3544 fatal("Option \"%s\" is unsupported for " 3545 "FIDO authenticator download", opts[i]); 3546 } 3547 } 3548 return do_download_sk(sk_provider, sk_device); 3549 } 3550 if (print_fingerprint || print_bubblebabble) 3551 do_fingerprint(pw); 3552 if (change_passphrase) 3553 do_change_passphrase(pw); 3554 if (change_comment) 3555 do_change_comment(pw, identity_comment); 3556 #ifdef WITH_OPENSSL 3557 if (convert_to) 3558 do_convert_to(pw); 3559 if (convert_from) 3560 do_convert_from(pw); 3561 #else /* WITH_OPENSSL */ 3562 if (convert_to || convert_from) 3563 fatal("key conversion disabled at compile time"); 3564 #endif /* WITH_OPENSSL */ 3565 if (print_public) 3566 do_print_public(pw); 3567 if (rr_hostname != NULL) { 3568 unsigned int n = 0; 3569 3570 if (have_identity) { 3571 n = do_print_resource_record(pw, identity_file, 3572 rr_hostname, print_generic); 3573 if (n == 0) 3574 fatal("%s: %s", identity_file, strerror(errno)); 3575 exit(0); 3576 } else { 3577 3578 n += do_print_resource_record(pw, 3579 _PATH_HOST_RSA_KEY_FILE, rr_hostname, 3580 print_generic); 3581 n += do_print_resource_record(pw, 3582 _PATH_HOST_DSA_KEY_FILE, rr_hostname, 3583 print_generic); 3584 n += do_print_resource_record(pw, 3585 _PATH_HOST_ECDSA_KEY_FILE, rr_hostname, 3586 print_generic); 3587 n += do_print_resource_record(pw, 3588 _PATH_HOST_ED25519_KEY_FILE, rr_hostname, 3589 print_generic); 3590 n += do_print_resource_record(pw, 3591 _PATH_HOST_XMSS_KEY_FILE, rr_hostname, 3592 print_generic); 3593 if (n == 0) 3594 fatal("no keys found."); 3595 exit(0); 3596 } 3597 } 3598 3599 if (do_gen_candidates || do_screen_candidates) { 3600 if (argc <= 0) 3601 fatal("No output file specified"); 3602 else if (argc > 1) 3603 fatal("Too many output files specified"); 3604 } 3605 if (do_gen_candidates) { 3606 do_moduli_gen(argv[0], opts, nopts); 3607 return 0; 3608 } 3609 if (do_screen_candidates) { 3610 do_moduli_screen(argv[0], opts, nopts); 3611 return 0; 3612 } 3613 3614 if (gen_all_hostkeys) { 3615 do_gen_all_hostkeys(pw); 3616 return (0); 3617 } 3618 3619 if (key_type_name == NULL) 3620 key_type_name = DEFAULT_KEY_TYPE_NAME; 3621 3622 type = sshkey_type_from_name(key_type_name); 3623 type_bits_valid(type, key_type_name, &bits); 3624 3625 if (!quiet) 3626 printf("Generating public/private %s key pair.\n", 3627 key_type_name); 3628 switch (type) { 3629 case KEY_ECDSA_SK: 3630 case KEY_ED25519_SK: 3631 for (i = 0; i < nopts; i++) { 3632 if (strcasecmp(opts[i], "no-touch-required") == 0) { 3633 sk_flags &= ~SSH_SK_USER_PRESENCE_REQD; 3634 } else if (strcasecmp(opts[i], "verify-required") == 0) { 3635 sk_flags |= SSH_SK_USER_VERIFICATION_REQD; 3636 } else if (strcasecmp(opts[i], "resident") == 0) { 3637 sk_flags |= SSH_SK_RESIDENT_KEY; 3638 } else if (strncasecmp(opts[i], "device=", 7) == 0) { 3639 sk_device = xstrdup(opts[i] + 7); 3640 } else if (strncasecmp(opts[i], "user=", 5) == 0) { 3641 sk_user = xstrdup(opts[i] + 5); 3642 } else if (strncasecmp(opts[i], "challenge=", 10) == 0) { 3643 if ((r = sshbuf_load_file(opts[i] + 10, 3644 &challenge)) != 0) { 3645 fatal_r(r, "Unable to load FIDO " 3646 "enrollment challenge \"%s\"", 3647 opts[i] + 10); 3648 } 3649 } else if (strncasecmp(opts[i], 3650 "write-attestation=", 18) == 0) { 3651 sk_attestation_path = opts[i] + 18; 3652 } else if (strncasecmp(opts[i], 3653 "application=", 12) == 0) { 3654 sk_application = xstrdup(opts[i] + 12); 3655 if (strncmp(sk_application, "ssh:", 4) != 0) { 3656 fatal("FIDO application string must " 3657 "begin with \"ssh:\""); 3658 } 3659 } else { 3660 fatal("Option \"%s\" is unsupported for " 3661 "FIDO authenticator enrollment", opts[i]); 3662 } 3663 } 3664 if (!quiet) { 3665 printf("You may need to touch your authenticator " 3666 "to authorize key generation.\n"); 3667 } 3668 if ((attest = sshbuf_new()) == NULL) 3669 fatal("sshbuf_new failed"); 3670 if ((sk_flags & 3671 (SSH_SK_USER_VERIFICATION_REQD|SSH_SK_RESIDENT_KEY))) { 3672 passphrase = read_passphrase("Enter PIN for " 3673 "authenticator: ", RP_ALLOW_STDIN); 3674 } else { 3675 passphrase = NULL; 3676 } 3677 for (i = 0 ; ; i++) { 3678 fflush(stdout); 3679 r = sshsk_enroll(type, sk_provider, sk_device, 3680 sk_application == NULL ? "ssh:" : sk_application, 3681 sk_user, sk_flags, passphrase, challenge, 3682 &private, attest); 3683 if (r == 0) 3684 break; 3685 if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 3686 fatal_r(r, "Key enrollment failed"); 3687 else if (passphrase != NULL) { 3688 error("PIN incorrect"); 3689 freezero(passphrase, strlen(passphrase)); 3690 passphrase = NULL; 3691 } 3692 if (i >= 3) 3693 fatal("Too many incorrect PINs"); 3694 passphrase = read_passphrase("Enter PIN for " 3695 "authenticator: ", RP_ALLOW_STDIN); 3696 if (!quiet) { 3697 printf("You may need to touch your " 3698 "authenticator (again) to authorize " 3699 "key generation.\n"); 3700 } 3701 } 3702 if (passphrase != NULL) { 3703 freezero(passphrase, strlen(passphrase)); 3704 passphrase = NULL; 3705 } 3706 break; 3707 default: 3708 if ((r = sshkey_generate(type, bits, &private)) != 0) 3709 fatal("sshkey_generate failed"); 3710 break; 3711 } 3712 if ((r = sshkey_from_private(private, &public)) != 0) 3713 fatal_r(r, "sshkey_from_private"); 3714 3715 if (!have_identity) 3716 ask_filename(pw, "Enter file in which to save the key"); 3717 3718 /* Create ~/.ssh directory if it doesn't already exist. */ 3719 hostfile_create_user_ssh_dir(identity_file, !quiet); 3720 3721 /* If the file already exists, ask the user to confirm. */ 3722 if (!confirm_overwrite(identity_file)) 3723 exit(1); 3724 3725 /* Determine the passphrase for the private key */ 3726 passphrase = private_key_passphrase(); 3727 if (identity_comment) { 3728 strlcpy(comment, identity_comment, sizeof(comment)); 3729 } else { 3730 /* Create default comment field for the passphrase. */ 3731 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); 3732 } 3733 3734 /* Save the key with the given passphrase and comment. */ 3735 if ((r = sshkey_save_private(private, identity_file, passphrase, 3736 comment, private_key_format, openssh_format_cipher, rounds)) != 0) { 3737 error_r(r, "Saving key \"%s\" failed", identity_file); 3738 freezero(passphrase, strlen(passphrase)); 3739 exit(1); 3740 } 3741 freezero(passphrase, strlen(passphrase)); 3742 sshkey_free(private); 3743 3744 if (!quiet) { 3745 printf("Your identification has been saved in %s\n", 3746 identity_file); 3747 } 3748 3749 strlcat(identity_file, ".pub", sizeof(identity_file)); 3750 if ((r = sshkey_save_public(public, identity_file, comment)) != 0) 3751 fatal_r(r, "Unable to save public key to %s", identity_file); 3752 3753 if (!quiet) { 3754 fp = sshkey_fingerprint(public, fingerprint_hash, 3755 SSH_FP_DEFAULT); 3756 ra = sshkey_fingerprint(public, fingerprint_hash, 3757 SSH_FP_RANDOMART); 3758 if (fp == NULL || ra == NULL) 3759 fatal("sshkey_fingerprint failed"); 3760 printf("Your public key has been saved in %s\n", 3761 identity_file); 3762 printf("The key fingerprint is:\n"); 3763 printf("%s %s\n", fp, comment); 3764 printf("The key's randomart image is:\n"); 3765 printf("%s\n", ra); 3766 free(ra); 3767 free(fp); 3768 } 3769 3770 if (sk_attestation_path != NULL) 3771 save_attestation(attest, sk_attestation_path); 3772 3773 sshbuf_free(attest); 3774 sshkey_free(public); 3775 3776 exit(0); 3777 } 3778