1/* $OpenBSD: ssh-keygen.c,v 1.266 2015/02/26 20:45:47 djm Exp $ */ 2/* 3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 4 * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 5 * All rights reserved 6 * Identity and host key generation and maintenance. 7 * 8 * As far as I am concerned, the code I have written for this software 9 * can be used freely for any purpose. Any derived versions of this 10 * software must be clearly marked as such, and if the derived work is 11 * incompatible with the protocol description in the RFC file, it must be 12 * called by a name other than "ssh" or "Secure Shell". 13 */ 14 15#include "includes.h" 16 17#include <sys/types.h> 18#include <sys/socket.h> 19#include <sys/stat.h> 20 21#ifdef WITH_OPENSSL 22#include <openssl/evp.h> 23#include <openssl/pem.h> 24#include "openbsd-compat/openssl-compat.h" 25#endif 26 27#include <errno.h> 28#include <fcntl.h> 29#include <netdb.h> 30#ifdef HAVE_PATHS_H 31# include <paths.h> 32#endif 33#include <pwd.h> 34#include <stdarg.h> 35#include <stdio.h> 36#include <stdlib.h> 37#include <string.h> 38#include <unistd.h> 39#include <limits.h> 40 41#include "xmalloc.h" 42#include "sshkey.h" 43#include "rsa.h" 44#include "authfile.h" 45#include "uuencode.h" 46#include "sshbuf.h" 47#include "pathnames.h" 48#include "log.h" 49#include "misc.h" 50#include "match.h" 51#include "hostfile.h" 52#include "dns.h" 53#include "ssh.h" 54#include "ssh2.h" 55#include "ssherr.h" 56#include "ssh-pkcs11.h" 57#include "atomicio.h" 58#include "krl.h" 59#include "digest.h" 60 61/* Number of bits in the RSA/DSA key. This value can be set on the command line. */ 62#define DEFAULT_BITS 2048 63#define DEFAULT_BITS_DSA 1024 64#define DEFAULT_BITS_ECDSA 256 65u_int32_t bits = 0; 66 67/* 68 * Flag indicating that we just want to change the passphrase. This can be 69 * set on the command line. 70 */ 71int change_passphrase = 0; 72 73/* 74 * Flag indicating that we just want to change the comment. This can be set 75 * on the command line. 76 */ 77int change_comment = 0; 78 79int quiet = 0; 80 81int log_level = SYSLOG_LEVEL_INFO; 82 83/* Flag indicating that we want to hash a known_hosts file */ 84int hash_hosts = 0; 85/* Flag indicating that we want lookup a host in known_hosts file */ 86int find_host = 0; 87/* Flag indicating that we want to delete a host from a known_hosts file */ 88int delete_host = 0; 89 90/* Flag indicating that we want to show the contents of a certificate */ 91int show_cert = 0; 92 93/* Flag indicating that we just want to see the key fingerprint */ 94int print_fingerprint = 0; 95int print_bubblebabble = 0; 96 97/* Hash algorithm to use for fingerprints. */ 98int fingerprint_hash = SSH_FP_HASH_DEFAULT; 99 100/* The identity file name, given on the command line or entered by the user. */ 101char identity_file[1024]; 102int have_identity = 0; 103 104/* This is set to the passphrase if given on the command line. */ 105char *identity_passphrase = NULL; 106 107/* This is set to the new passphrase if given on the command line. */ 108char *identity_new_passphrase = NULL; 109 110/* This is set to the new comment if given on the command line. */ 111char *identity_comment = NULL; 112 113/* Path to CA key when certifying keys. */ 114char *ca_key_path = NULL; 115 116/* Certificate serial number */ 117unsigned long long cert_serial = 0; 118 119/* Key type when certifying */ 120u_int cert_key_type = SSH2_CERT_TYPE_USER; 121 122/* "key ID" of signed key */ 123char *cert_key_id = NULL; 124 125/* Comma-separated list of principal names for certifying keys */ 126char *cert_principals = NULL; 127 128/* Validity period for certificates */ 129u_int64_t cert_valid_from = 0; 130u_int64_t cert_valid_to = ~0ULL; 131 132/* Certificate options */ 133#define CERTOPT_X_FWD (1) 134#define CERTOPT_AGENT_FWD (1<<1) 135#define CERTOPT_PORT_FWD (1<<2) 136#define CERTOPT_PTY (1<<3) 137#define CERTOPT_USER_RC (1<<4) 138#define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \ 139 CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC) 140u_int32_t certflags_flags = CERTOPT_DEFAULT; 141char *certflags_command = NULL; 142char *certflags_src_addr = NULL; 143 144/* Conversion to/from various formats */ 145int convert_to = 0; 146int convert_from = 0; 147enum { 148 FMT_RFC4716, 149 FMT_PKCS8, 150 FMT_PEM 151} convert_format = FMT_RFC4716; 152int print_public = 0; 153int print_generic = 0; 154 155char *key_type_name = NULL; 156 157/* Load key from this PKCS#11 provider */ 158char *pkcs11provider = NULL; 159 160/* Use new OpenSSH private key format when writing SSH2 keys instead of PEM */ 161int use_new_format = 0; 162 163/* Cipher for new-format private keys */ 164char *new_format_cipher = NULL; 165 166/* 167 * Number of KDF rounds to derive new format keys / 168 * number of primality trials when screening moduli. 169 */ 170int rounds = 0; 171 172/* argv0 */ 173extern char *__progname; 174 175char hostname[NI_MAXHOST]; 176 177/* moduli.c */ 178int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); 179int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long, 180 unsigned long); 181 182static void 183type_bits_valid(int type, const char *name, u_int32_t *bitsp) 184{ 185#ifdef WITH_OPENSSL 186 u_int maxbits; 187 int nid; 188#endif 189 190 if (type == KEY_UNSPEC) { 191 fprintf(stderr, "unknown key type %s\n", key_type_name); 192 exit(1); 193 } 194 if (*bitsp == 0) { 195#ifdef WITH_OPENSSL 196 if (type == KEY_DSA) 197 *bitsp = DEFAULT_BITS_DSA; 198 else if (type == KEY_ECDSA) { 199 if (name != NULL && 200 (nid = sshkey_ecdsa_nid_from_name(name)) > 0) 201 *bitsp = sshkey_curve_nid_to_bits(nid); 202 if (*bitsp == 0) 203 *bitsp = DEFAULT_BITS_ECDSA; 204 } else 205#endif 206 *bitsp = DEFAULT_BITS; 207 } 208#ifdef WITH_OPENSSL 209 maxbits = (type == KEY_DSA) ? 210 OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS; 211 if (*bitsp > maxbits) { 212 fprintf(stderr, "key bits exceeds maximum %d\n", maxbits); 213 exit(1); 214 } 215 if (type == KEY_DSA && *bitsp != 1024) 216 fatal("DSA keys must be 1024 bits"); 217 else if (type != KEY_ECDSA && type != KEY_ED25519 && *bitsp < 768) 218 fatal("Key must at least be 768 bits"); 219 else if (type == KEY_ECDSA && sshkey_ecdsa_bits_to_nid(*bitsp) == -1) 220 fatal("Invalid ECDSA key length - valid lengths are " 221 "256, 384 or 521 bits"); 222#endif 223} 224 225static void 226ask_filename(struct passwd *pw, const char *prompt) 227{ 228 char buf[1024]; 229 char *name = NULL; 230 231 if (key_type_name == NULL) 232 name = _PATH_SSH_CLIENT_ID_RSA; 233 else { 234 switch (sshkey_type_from_name(key_type_name)) { 235 case KEY_RSA1: 236 name = _PATH_SSH_CLIENT_IDENTITY; 237 break; 238 case KEY_DSA_CERT: 239 case KEY_DSA_CERT_V00: 240 case KEY_DSA: 241 name = _PATH_SSH_CLIENT_ID_DSA; 242 break; 243#ifdef OPENSSL_HAS_ECC 244 case KEY_ECDSA_CERT: 245 case KEY_ECDSA: 246 name = _PATH_SSH_CLIENT_ID_ECDSA; 247 break; 248#endif 249 case KEY_RSA_CERT: 250 case KEY_RSA_CERT_V00: 251 case KEY_RSA: 252 name = _PATH_SSH_CLIENT_ID_RSA; 253 break; 254 case KEY_ED25519: 255 case KEY_ED25519_CERT: 256 name = _PATH_SSH_CLIENT_ID_ED25519; 257 break; 258 default: 259 fprintf(stderr, "bad key type\n"); 260 exit(1); 261 break; 262 } 263 } 264 snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); 265 fprintf(stderr, "%s (%s): ", prompt, identity_file); 266 if (fgets(buf, sizeof(buf), stdin) == NULL) 267 exit(1); 268 buf[strcspn(buf, "\n")] = '\0'; 269 if (strcmp(buf, "") != 0) 270 strlcpy(identity_file, buf, sizeof(identity_file)); 271 have_identity = 1; 272} 273 274static struct sshkey * 275load_identity(char *filename) 276{ 277 char *pass; 278 struct sshkey *prv; 279 int r; 280 281 if ((r = sshkey_load_private(filename, "", &prv, NULL)) == 0) 282 return prv; 283 if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) 284 fatal("Load key \"%s\": %s", filename, ssh_err(r)); 285 if (identity_passphrase) 286 pass = xstrdup(identity_passphrase); 287 else 288 pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN); 289 r = sshkey_load_private(filename, pass, &prv, NULL); 290 explicit_bzero(pass, strlen(pass)); 291 free(pass); 292 if (r != 0) 293 fatal("Load key \"%s\": %s", filename, ssh_err(r)); 294 return prv; 295} 296 297#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" 298#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" 299#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" 300#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb 301 302#ifdef WITH_OPENSSL 303static void 304do_convert_to_ssh2(struct passwd *pw, struct sshkey *k) 305{ 306 size_t len; 307 u_char *blob; 308 char comment[61]; 309 int r; 310 311 if (k->type == KEY_RSA1) { 312 fprintf(stderr, "version 1 keys are not supported\n"); 313 exit(1); 314 } 315 if ((r = sshkey_to_blob(k, &blob, &len)) != 0) { 316 fprintf(stderr, "key_to_blob failed: %s\n", ssh_err(r)); 317 exit(1); 318 } 319 /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */ 320 snprintf(comment, sizeof(comment), 321 "%u-bit %s, converted by %s@%s from OpenSSH", 322 sshkey_size(k), sshkey_type(k), 323 pw->pw_name, hostname); 324 325 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); 326 fprintf(stdout, "Comment: \"%s\"\n", comment); 327 dump_base64(stdout, blob, len); 328 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); 329 sshkey_free(k); 330 free(blob); 331 exit(0); 332} 333 334static void 335do_convert_to_pkcs8(struct sshkey *k) 336{ 337 switch (sshkey_type_plain(k->type)) { 338 case KEY_RSA1: 339 case KEY_RSA: 340 if (!PEM_write_RSA_PUBKEY(stdout, k->rsa)) 341 fatal("PEM_write_RSA_PUBKEY failed"); 342 break; 343 case KEY_DSA: 344 if (!PEM_write_DSA_PUBKEY(stdout, k->dsa)) 345 fatal("PEM_write_DSA_PUBKEY failed"); 346 break; 347#ifdef OPENSSL_HAS_ECC 348 case KEY_ECDSA: 349 if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa)) 350 fatal("PEM_write_EC_PUBKEY failed"); 351 break; 352#endif 353 default: 354 fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); 355 } 356 exit(0); 357} 358 359static void 360do_convert_to_pem(struct sshkey *k) 361{ 362 switch (sshkey_type_plain(k->type)) { 363 case KEY_RSA1: 364 case KEY_RSA: 365 if (!PEM_write_RSAPublicKey(stdout, k->rsa)) 366 fatal("PEM_write_RSAPublicKey failed"); 367 break; 368#if notyet /* OpenSSH 0.9.8 lacks this function */ 369 case KEY_DSA: 370 if (!PEM_write_DSAPublicKey(stdout, k->dsa)) 371 fatal("PEM_write_DSAPublicKey failed"); 372 break; 373#endif 374 /* XXX ECDSA? */ 375 default: 376 fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); 377 } 378 exit(0); 379} 380 381static void 382do_convert_to(struct passwd *pw) 383{ 384 struct sshkey *k; 385 struct stat st; 386 int r; 387 388 if (!have_identity) 389 ask_filename(pw, "Enter file in which the key is"); 390 if (stat(identity_file, &st) < 0) 391 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 392 if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0) 393 k = load_identity(identity_file); 394 switch (convert_format) { 395 case FMT_RFC4716: 396 do_convert_to_ssh2(pw, k); 397 break; 398 case FMT_PKCS8: 399 do_convert_to_pkcs8(k); 400 break; 401 case FMT_PEM: 402 do_convert_to_pem(k); 403 break; 404 default: 405 fatal("%s: unknown key format %d", __func__, convert_format); 406 } 407 exit(0); 408} 409 410/* 411 * This is almost exactly the bignum1 encoding, but with 32 bit for length 412 * instead of 16. 413 */ 414static void 415buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value) 416{ 417 u_int bytes, bignum_bits; 418 int r; 419 420 if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0) 421 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 422 bytes = (bignum_bits + 7) / 8; 423 if (sshbuf_len(b) < bytes) 424 fatal("%s: input buffer too small: need %d have %zu", 425 __func__, bytes, sshbuf_len(b)); 426 if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL) 427 fatal("%s: BN_bin2bn failed", __func__); 428 if ((r = sshbuf_consume(b, bytes)) != 0) 429 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 430} 431 432static struct sshkey * 433do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) 434{ 435 struct sshbuf *b; 436 struct sshkey *key = NULL; 437 char *type, *cipher; 438 u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345"; 439 int r, rlen, ktype; 440 u_int magic, i1, i2, i3, i4; 441 size_t slen; 442 u_long e; 443 444 if ((b = sshbuf_from(blob, blen)) == NULL) 445 fatal("%s: sshbuf_from failed", __func__); 446 if ((r = sshbuf_get_u32(b, &magic)) != 0) 447 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 448 449 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { 450 error("bad magic 0x%x != 0x%x", magic, 451 SSH_COM_PRIVATE_KEY_MAGIC); 452 sshbuf_free(b); 453 return NULL; 454 } 455 if ((r = sshbuf_get_u32(b, &i1)) != 0 || 456 (r = sshbuf_get_cstring(b, &type, NULL)) != 0 || 457 (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 || 458 (r = sshbuf_get_u32(b, &i2)) != 0 || 459 (r = sshbuf_get_u32(b, &i3)) != 0 || 460 (r = sshbuf_get_u32(b, &i4)) != 0) 461 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 462 debug("ignore (%d %d %d %d)", i1, i2, i3, i4); 463 if (strcmp(cipher, "none") != 0) { 464 error("unsupported cipher %s", cipher); 465 free(cipher); 466 sshbuf_free(b); 467 free(type); 468 return NULL; 469 } 470 free(cipher); 471 472 if (strstr(type, "dsa")) { 473 ktype = KEY_DSA; 474 } else if (strstr(type, "rsa")) { 475 ktype = KEY_RSA; 476 } else { 477 sshbuf_free(b); 478 free(type); 479 return NULL; 480 } 481 if ((key = sshkey_new_private(ktype)) == NULL) 482 fatal("key_new_private failed"); 483 free(type); 484 485 switch (key->type) { 486 case KEY_DSA: 487 buffer_get_bignum_bits(b, key->dsa->p); 488 buffer_get_bignum_bits(b, key->dsa->g); 489 buffer_get_bignum_bits(b, key->dsa->q); 490 buffer_get_bignum_bits(b, key->dsa->pub_key); 491 buffer_get_bignum_bits(b, key->dsa->priv_key); 492 break; 493 case KEY_RSA: 494 if ((r = sshbuf_get_u8(b, &e1)) != 0 || 495 (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) || 496 (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0)) 497 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 498 e = e1; 499 debug("e %lx", e); 500 if (e < 30) { 501 e <<= 8; 502 e += e2; 503 debug("e %lx", e); 504 e <<= 8; 505 e += e3; 506 debug("e %lx", e); 507 } 508 if (!BN_set_word(key->rsa->e, e)) { 509 sshbuf_free(b); 510 sshkey_free(key); 511 return NULL; 512 } 513 buffer_get_bignum_bits(b, key->rsa->d); 514 buffer_get_bignum_bits(b, key->rsa->n); 515 buffer_get_bignum_bits(b, key->rsa->iqmp); 516 buffer_get_bignum_bits(b, key->rsa->q); 517 buffer_get_bignum_bits(b, key->rsa->p); 518 if ((r = rsa_generate_additional_parameters(key->rsa)) != 0) 519 fatal("generate RSA parameters failed: %s", ssh_err(r)); 520 break; 521 } 522 rlen = sshbuf_len(b); 523 if (rlen != 0) 524 error("do_convert_private_ssh2_from_blob: " 525 "remaining bytes in key blob %d", rlen); 526 sshbuf_free(b); 527 528 /* try the key */ 529 if (sshkey_sign(key, &sig, &slen, data, sizeof(data), 0) != 0 || 530 sshkey_verify(key, sig, slen, data, sizeof(data), 0) != 0) { 531 sshkey_free(key); 532 free(sig); 533 return NULL; 534 } 535 free(sig); 536 return key; 537} 538 539static int 540get_line(FILE *fp, char *line, size_t len) 541{ 542 int c; 543 size_t pos = 0; 544 545 line[0] = '\0'; 546 while ((c = fgetc(fp)) != EOF) { 547 if (pos >= len - 1) { 548 fprintf(stderr, "input line too long.\n"); 549 exit(1); 550 } 551 switch (c) { 552 case '\r': 553 c = fgetc(fp); 554 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { 555 fprintf(stderr, "unget: %s\n", strerror(errno)); 556 exit(1); 557 } 558 return pos; 559 case '\n': 560 return pos; 561 } 562 line[pos++] = c; 563 line[pos] = '\0'; 564 } 565 /* We reached EOF */ 566 return -1; 567} 568 569static void 570do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private) 571{ 572 int r, blen, escaped = 0; 573 u_int len; 574 char line[1024]; 575 u_char blob[8096]; 576 char encoded[8096]; 577 FILE *fp; 578 579 if ((fp = fopen(identity_file, "r")) == NULL) 580 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 581 encoded[0] = '\0'; 582 while ((blen = get_line(fp, line, sizeof(line))) != -1) { 583 if (blen > 0 && line[blen - 1] == '\\') 584 escaped++; 585 if (strncmp(line, "----", 4) == 0 || 586 strstr(line, ": ") != NULL) { 587 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) 588 *private = 1; 589 if (strstr(line, " END ") != NULL) { 590 break; 591 } 592 /* fprintf(stderr, "ignore: %s", line); */ 593 continue; 594 } 595 if (escaped) { 596 escaped--; 597 /* fprintf(stderr, "escaped: %s", line); */ 598 continue; 599 } 600 strlcat(encoded, line, sizeof(encoded)); 601 } 602 len = strlen(encoded); 603 if (((len % 4) == 3) && 604 (encoded[len-1] == '=') && 605 (encoded[len-2] == '=') && 606 (encoded[len-3] == '=')) 607 encoded[len-3] = '\0'; 608 blen = uudecode(encoded, blob, sizeof(blob)); 609 if (blen < 0) { 610 fprintf(stderr, "uudecode failed.\n"); 611 exit(1); 612 } 613 if (*private) 614 *k = do_convert_private_ssh2_from_blob(blob, blen); 615 else if ((r = sshkey_from_blob(blob, blen, k)) != 0) { 616 fprintf(stderr, "decode blob failed: %s\n", ssh_err(r)); 617 exit(1); 618 } 619 fclose(fp); 620} 621 622static void 623do_convert_from_pkcs8(struct sshkey **k, int *private) 624{ 625 EVP_PKEY *pubkey; 626 FILE *fp; 627 628 if ((fp = fopen(identity_file, "r")) == NULL) 629 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 630 if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) { 631 fatal("%s: %s is not a recognised public key format", __func__, 632 identity_file); 633 } 634 fclose(fp); 635 switch (EVP_PKEY_type(pubkey->type)) { 636 case EVP_PKEY_RSA: 637 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 638 fatal("sshkey_new failed"); 639 (*k)->type = KEY_RSA; 640 (*k)->rsa = EVP_PKEY_get1_RSA(pubkey); 641 break; 642 case EVP_PKEY_DSA: 643 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 644 fatal("sshkey_new failed"); 645 (*k)->type = KEY_DSA; 646 (*k)->dsa = EVP_PKEY_get1_DSA(pubkey); 647 break; 648#ifdef OPENSSL_HAS_ECC 649 case EVP_PKEY_EC: 650 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 651 fatal("sshkey_new failed"); 652 (*k)->type = KEY_ECDSA; 653 (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey); 654 (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa); 655 break; 656#endif 657 default: 658 fatal("%s: unsupported pubkey type %d", __func__, 659 EVP_PKEY_type(pubkey->type)); 660 } 661 EVP_PKEY_free(pubkey); 662 return; 663} 664 665static void 666do_convert_from_pem(struct sshkey **k, int *private) 667{ 668 FILE *fp; 669 RSA *rsa; 670#ifdef notyet 671 DSA *dsa; 672#endif 673 674 if ((fp = fopen(identity_file, "r")) == NULL) 675 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 676 if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { 677 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 678 fatal("sshkey_new failed"); 679 (*k)->type = KEY_RSA; 680 (*k)->rsa = rsa; 681 fclose(fp); 682 return; 683 } 684#if notyet /* OpenSSH 0.9.8 lacks this function */ 685 rewind(fp); 686 if ((dsa = PEM_read_DSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { 687 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) 688 fatal("sshkey_new failed"); 689 (*k)->type = KEY_DSA; 690 (*k)->dsa = dsa; 691 fclose(fp); 692 return; 693 } 694 /* XXX ECDSA */ 695#endif 696 fatal("%s: unrecognised raw private key format", __func__); 697} 698 699static void 700do_convert_from(struct passwd *pw) 701{ 702 struct sshkey *k = NULL; 703 int r, private = 0, ok = 0; 704 struct stat st; 705 706 if (!have_identity) 707 ask_filename(pw, "Enter file in which the key is"); 708 if (stat(identity_file, &st) < 0) 709 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 710 711 switch (convert_format) { 712 case FMT_RFC4716: 713 do_convert_from_ssh2(pw, &k, &private); 714 break; 715 case FMT_PKCS8: 716 do_convert_from_pkcs8(&k, &private); 717 break; 718 case FMT_PEM: 719 do_convert_from_pem(&k, &private); 720 break; 721 default: 722 fatal("%s: unknown key format %d", __func__, convert_format); 723 } 724 725 if (!private) { 726 if ((r = sshkey_write(k, stdout)) == 0) 727 ok = 1; 728 if (ok) 729 fprintf(stdout, "\n"); 730 } else { 731 switch (k->type) { 732 case KEY_DSA: 733 ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, 734 NULL, 0, NULL, NULL); 735 break; 736#ifdef OPENSSL_HAS_ECC 737 case KEY_ECDSA: 738 ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL, 739 NULL, 0, NULL, NULL); 740 break; 741#endif 742 case KEY_RSA: 743 ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, 744 NULL, 0, NULL, NULL); 745 break; 746 default: 747 fatal("%s: unsupported key type %s", __func__, 748 sshkey_type(k)); 749 } 750 } 751 752 if (!ok) { 753 fprintf(stderr, "key write failed\n"); 754 exit(1); 755 } 756 sshkey_free(k); 757 exit(0); 758} 759#endif 760 761static void 762do_print_public(struct passwd *pw) 763{ 764 struct sshkey *prv; 765 struct stat st; 766 int r; 767 768 if (!have_identity) 769 ask_filename(pw, "Enter file in which the key is"); 770 if (stat(identity_file, &st) < 0) { 771 perror(identity_file); 772 exit(1); 773 } 774 prv = load_identity(identity_file); 775 if ((r = sshkey_write(prv, stdout)) != 0) 776 fprintf(stderr, "key_write failed: %s", ssh_err(r)); 777 sshkey_free(prv); 778 fprintf(stdout, "\n"); 779 exit(0); 780} 781 782static void 783do_download(struct passwd *pw) 784{ 785#ifdef ENABLE_PKCS11 786 struct sshkey **keys = NULL; 787 int i, nkeys; 788 enum sshkey_fp_rep rep; 789 int fptype; 790 char *fp, *ra; 791 792 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 793 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 794 795 pkcs11_init(0); 796 nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys); 797 if (nkeys <= 0) 798 fatal("cannot read public key from pkcs11"); 799 for (i = 0; i < nkeys; i++) { 800 if (print_fingerprint) { 801 fp = sshkey_fingerprint(keys[i], fptype, rep); 802 ra = sshkey_fingerprint(keys[i], fingerprint_hash, 803 SSH_FP_RANDOMART); 804 if (fp == NULL || ra == NULL) 805 fatal("%s: sshkey_fingerprint fail", __func__); 806 printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]), 807 fp, sshkey_type(keys[i])); 808 if (log_level >= SYSLOG_LEVEL_VERBOSE) 809 printf("%s\n", ra); 810 free(ra); 811 free(fp); 812 } else { 813 (void) sshkey_write(keys[i], stdout); /* XXX check */ 814 fprintf(stdout, "\n"); 815 } 816 sshkey_free(keys[i]); 817 } 818 free(keys); 819 pkcs11_terminate(); 820 exit(0); 821#else 822 fatal("no pkcs11 support"); 823#endif /* ENABLE_PKCS11 */ 824} 825 826static void 827do_fingerprint(struct passwd *pw) 828{ 829 FILE *f; 830 struct sshkey *public; 831 char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra; 832 int r, i, skip = 0, num = 0, invalid = 1; 833 enum sshkey_fp_rep rep; 834 int fptype; 835 struct stat st; 836 837 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; 838 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; 839 if (!have_identity) 840 ask_filename(pw, "Enter file in which the key is"); 841 if (stat(identity_file, &st) < 0) { 842 perror(identity_file); 843 exit(1); 844 } 845 if ((r = sshkey_load_public(identity_file, &public, &comment)) != 0) 846 debug2("Error loading public key \"%s\": %s", 847 identity_file, ssh_err(r)); 848 else { 849 fp = sshkey_fingerprint(public, fptype, rep); 850 ra = sshkey_fingerprint(public, fingerprint_hash, 851 SSH_FP_RANDOMART); 852 if (fp == NULL || ra == NULL) 853 fatal("%s: sshkey_fingerprint fail", __func__); 854 printf("%u %s %s (%s)\n", sshkey_size(public), fp, comment, 855 sshkey_type(public)); 856 if (log_level >= SYSLOG_LEVEL_VERBOSE) 857 printf("%s\n", ra); 858 sshkey_free(public); 859 free(comment); 860 free(ra); 861 free(fp); 862 exit(0); 863 } 864 if (comment) { 865 free(comment); 866 comment = NULL; 867 } 868 869 if ((f = fopen(identity_file, "r")) == NULL) 870 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 871 872 while (fgets(line, sizeof(line), f)) { 873 if ((cp = strchr(line, '\n')) == NULL) { 874 error("line %d too long: %.40s...", 875 num + 1, line); 876 skip = 1; 877 continue; 878 } 879 num++; 880 if (skip) { 881 skip = 0; 882 continue; 883 } 884 *cp = '\0'; 885 886 /* Skip leading whitespace, empty and comment lines. */ 887 for (cp = line; *cp == ' ' || *cp == '\t'; cp++) 888 ; 889 if (!*cp || *cp == '\n' || *cp == '#') 890 continue; 891 i = strtol(cp, &ep, 10); 892 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { 893 int quoted = 0; 894 comment = cp; 895 for (; *cp && (quoted || (*cp != ' ' && 896 *cp != '\t')); cp++) { 897 if (*cp == '\\' && cp[1] == '"') 898 cp++; /* Skip both */ 899 else if (*cp == '"') 900 quoted = !quoted; 901 } 902 if (!*cp) 903 continue; 904 *cp++ = '\0'; 905 } 906 ep = cp; 907 if ((public = sshkey_new(KEY_RSA1)) == NULL) 908 fatal("sshkey_new failed"); 909 if ((r = sshkey_read(public, &cp)) != 0) { 910 cp = ep; 911 sshkey_free(public); 912 if ((public = sshkey_new(KEY_UNSPEC)) == NULL) 913 fatal("sshkey_new failed"); 914 if ((r = sshkey_read(public, &cp)) != 0) { 915 sshkey_free(public); 916 continue; 917 } 918 } 919 comment = *cp ? cp : comment; 920 fp = sshkey_fingerprint(public, fptype, rep); 921 ra = sshkey_fingerprint(public, fingerprint_hash, 922 SSH_FP_RANDOMART); 923 if (fp == NULL || ra == NULL) 924 fatal("%s: sshkey_fingerprint fail", __func__); 925 printf("%u %s %s (%s)\n", sshkey_size(public), fp, 926 comment ? comment : "no comment", sshkey_type(public)); 927 if (log_level >= SYSLOG_LEVEL_VERBOSE) 928 printf("%s\n", ra); 929 free(ra); 930 free(fp); 931 sshkey_free(public); 932 invalid = 0; 933 } 934 fclose(f); 935 936 if (invalid) { 937 printf("%s is not a public key file.\n", identity_file); 938 exit(1); 939 } 940 exit(0); 941} 942 943static void 944do_gen_all_hostkeys(struct passwd *pw) 945{ 946 struct { 947 char *key_type; 948 char *key_type_display; 949 char *path; 950 } key_types[] = { 951 { "rsa1", "RSA1", _PATH_HOST_KEY_FILE }, 952 { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE }, 953 { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE }, 954#ifdef OPENSSL_HAS_ECC 955 { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE }, 956#endif 957 { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE }, 958 { NULL, NULL, NULL } 959 }; 960 961 int first = 0; 962 struct stat st; 963 struct sshkey *private, *public; 964 char comment[1024]; 965 int i, type, fd, r; 966 FILE *f; 967 968 for (i = 0; key_types[i].key_type; i++) { 969 if (stat(key_types[i].path, &st) == 0) 970 continue; 971 if (errno != ENOENT) { 972 printf("Could not stat %s: %s", key_types[i].path, 973 strerror(errno)); 974 first = 0; 975 continue; 976 } 977 978 if (first == 0) { 979 first = 1; 980 printf("%s: generating new host keys: ", __progname); 981 } 982 printf("%s ", key_types[i].key_type_display); 983 fflush(stdout); 984 type = sshkey_type_from_name(key_types[i].key_type); 985 strlcpy(identity_file, key_types[i].path, sizeof(identity_file)); 986 bits = 0; 987 type_bits_valid(type, NULL, &bits); 988 if ((r = sshkey_generate(type, bits, &private)) != 0) { 989 fprintf(stderr, "key_generate failed: %s\n", 990 ssh_err(r)); 991 first = 0; 992 continue; 993 } 994 if ((r = sshkey_from_private(private, &public)) != 0) 995 fatal("sshkey_from_private failed: %s", ssh_err(r)); 996 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, 997 hostname); 998 if ((r = sshkey_save_private(private, identity_file, "", 999 comment, use_new_format, new_format_cipher, rounds)) != 0) { 1000 printf("Saving key \"%s\" failed: %s\n", identity_file, 1001 ssh_err(r)); 1002 sshkey_free(private); 1003 sshkey_free(public); 1004 first = 0; 1005 continue; 1006 } 1007 sshkey_free(private); 1008 strlcat(identity_file, ".pub", sizeof(identity_file)); 1009 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 1010 if (fd == -1) { 1011 printf("Could not save your public key in %s\n", 1012 identity_file); 1013 sshkey_free(public); 1014 first = 0; 1015 continue; 1016 } 1017 f = fdopen(fd, "w"); 1018 if (f == NULL) { 1019 printf("fdopen %s failed\n", identity_file); 1020 close(fd); 1021 sshkey_free(public); 1022 first = 0; 1023 continue; 1024 } 1025 if ((r = sshkey_write(public, f)) != 0) { 1026 fprintf(stderr, "write key failed: %s\n", ssh_err(r)); 1027 fclose(f); 1028 sshkey_free(public); 1029 first = 0; 1030 continue; 1031 } 1032 fprintf(f, " %s\n", comment); 1033 fclose(f); 1034 sshkey_free(public); 1035 1036 } 1037 if (first != 0) 1038 printf("\n"); 1039} 1040 1041struct known_hosts_ctx { 1042 const char *host; /* Hostname searched for in find/delete case */ 1043 FILE *out; /* Output file, stdout for find_hosts case */ 1044 int has_unhashed; /* When hashing, original had unhashed hosts */ 1045 int found_key; /* For find/delete, host was found */ 1046 int invalid; /* File contained invalid items; don't delete */ 1047}; 1048 1049static int 1050known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx) 1051{ 1052 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1053 char *hashed, *cp, *hosts, *ohosts; 1054 int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts); 1055 1056 switch (l->status) { 1057 case HKF_STATUS_OK: 1058 case HKF_STATUS_MATCHED: 1059 /* 1060 * Don't hash hosts already already hashed, with wildcard 1061 * characters or a CA/revocation marker. 1062 */ 1063 if ((l->match & HKF_MATCH_HOST_HASHED) != 0 || 1064 has_wild || l->marker != MRK_NONE) { 1065 fprintf(ctx->out, "%s\n", l->line); 1066 if (has_wild && !find_host) { 1067 fprintf(stderr, "%s:%ld: ignoring host name " 1068 "with wildcard: %.64s\n", l->path, 1069 l->linenum, l->hosts); 1070 } 1071 return 0; 1072 } 1073 /* 1074 * Split any comma-separated hostnames from the host list, 1075 * hash and store separately. 1076 */ 1077 ohosts = hosts = xstrdup(l->hosts); 1078 while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') { 1079 if ((hashed = host_hash(cp, NULL, 0)) == NULL) 1080 fatal("hash_host failed"); 1081 fprintf(ctx->out, "%s %s\n", hashed, l->rawkey); 1082 ctx->has_unhashed = 1; 1083 } 1084 free(ohosts); 1085 return 0; 1086 case HKF_STATUS_INVALID: 1087 /* Retain invalid lines, but mark file as invalid. */ 1088 ctx->invalid = 1; 1089 fprintf(stderr, "%s:%ld: invalid line\n", l->path, l->linenum); 1090 /* FALLTHROUGH */ 1091 default: 1092 fprintf(ctx->out, "%s\n", l->line); 1093 return 0; 1094 } 1095 /* NOTREACHED */ 1096 return -1; 1097} 1098 1099static int 1100known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx) 1101{ 1102 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; 1103 1104 if (l->status == HKF_STATUS_MATCHED) { 1105 if (delete_host) { 1106 if (l->marker != MRK_NONE) { 1107 /* Don't remove CA and revocation lines */ 1108 fprintf(ctx->out, "%s\n", l->line); 1109 } else { 1110 /* 1111 * Hostname matches and has no CA/revoke 1112 * marker, delete it by *not* writing the 1113 * line to ctx->out. 1114 */ 1115 ctx->found_key = 1; 1116 if (!quiet) 1117 printf("# Host %s found: line %ld\n", 1118 ctx->host, l->linenum); 1119 } 1120 return 0; 1121 } else if (find_host) { 1122 ctx->found_key = 1; 1123 if (!quiet) { 1124 printf("# Host %s found: line %ld %s\n", 1125 ctx->host, 1126 l->linenum, l->marker == MRK_CA ? "CA" : 1127 (l->marker == MRK_REVOKE ? "REVOKED" : "")); 1128 } 1129 if (hash_hosts) 1130 known_hosts_hash(l, ctx); 1131 else 1132 fprintf(ctx->out, "%s\n", l->line); 1133 return 0; 1134 } 1135 } else if (delete_host) { 1136 /* Retain non-matching hosts when deleting */ 1137 if (l->status == HKF_STATUS_INVALID) { 1138 ctx->invalid = 1; 1139 fprintf(stderr, "%s:%ld: invalid line\n", 1140 l->path, l->linenum); 1141 } 1142 fprintf(ctx->out, "%s\n", l->line); 1143 } 1144 return 0; 1145} 1146 1147static void 1148do_known_hosts(struct passwd *pw, const char *name) 1149{ 1150 char *cp, tmp[PATH_MAX], old[PATH_MAX]; 1151 int r, fd, oerrno, inplace = 0; 1152 struct known_hosts_ctx ctx; 1153 1154 if (!have_identity) { 1155 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); 1156 if (strlcpy(identity_file, cp, sizeof(identity_file)) >= 1157 sizeof(identity_file)) 1158 fatal("Specified known hosts path too long"); 1159 free(cp); 1160 have_identity = 1; 1161 } 1162 1163 memset(&ctx, 0, sizeof(ctx)); 1164 ctx.out = stdout; 1165 ctx.host = name; 1166 1167 /* 1168 * Find hosts goes to stdout, hash and deletions happen in-place 1169 * A corner case is ssh-keygen -HF foo, which should go to stdout 1170 */ 1171 if (!find_host && (hash_hosts || delete_host)) { 1172 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || 1173 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || 1174 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || 1175 strlcat(old, ".old", sizeof(old)) >= sizeof(old)) 1176 fatal("known_hosts path too long"); 1177 umask(077); 1178 if ((fd = mkstemp(tmp)) == -1) 1179 fatal("mkstemp: %s", strerror(errno)); 1180 if ((ctx.out = fdopen(fd, "w")) == NULL) { 1181 oerrno = errno; 1182 unlink(tmp); 1183 fatal("fdopen: %s", strerror(oerrno)); 1184 } 1185 inplace = 1; 1186 } 1187 1188 /* XXX support identity_file == "-" for stdin */ 1189 if ((r = hostkeys_foreach(identity_file, 1190 hash_hosts ? known_hosts_hash : known_hosts_find_delete, &ctx, 1191 name, NULL, find_host ? HKF_WANT_MATCH : 0)) != 0) 1192 fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r)); 1193 1194 if (inplace) 1195 fclose(ctx.out); 1196 1197 if (ctx.invalid) { 1198 fprintf(stderr, "%s is not a valid known_hosts file.\n", 1199 identity_file); 1200 if (inplace) { 1201 fprintf(stderr, "Not replacing existing known_hosts " 1202 "file because of errors\n"); 1203 unlink(tmp); 1204 } 1205 exit(1); 1206 } else if (delete_host && !ctx.found_key) { 1207 fprintf(stderr, "Host %s not found in %s\n", 1208 name, identity_file); 1209 unlink(tmp); 1210 } else if (inplace) { 1211 /* Backup existing file */ 1212 if (unlink(old) == -1 && errno != ENOENT) 1213 fatal("unlink %.100s: %s", old, strerror(errno)); 1214 if (link(identity_file, old) == -1) 1215 fatal("link %.100s to %.100s: %s", identity_file, old, 1216 strerror(errno)); 1217 /* Move new one into place */ 1218 if (rename(tmp, identity_file) == -1) { 1219 error("rename\"%s\" to \"%s\": %s", tmp, identity_file, 1220 strerror(errno)); 1221 unlink(tmp); 1222 unlink(old); 1223 exit(1); 1224 } 1225 1226 fprintf(stderr, "%s updated.\n", identity_file); 1227 fprintf(stderr, "Original contents retained as %s\n", old); 1228 if (ctx.has_unhashed) { 1229 fprintf(stderr, "WARNING: %s contains unhashed " 1230 "entries\n", old); 1231 fprintf(stderr, "Delete this file to ensure privacy " 1232 "of hostnames\n"); 1233 } 1234 } 1235 1236 exit (find_host && !ctx.found_key); 1237} 1238 1239/* 1240 * Perform changing a passphrase. The argument is the passwd structure 1241 * for the current user. 1242 */ 1243static void 1244do_change_passphrase(struct passwd *pw) 1245{ 1246 char *comment; 1247 char *old_passphrase, *passphrase1, *passphrase2; 1248 struct stat st; 1249 struct sshkey *private; 1250 int r; 1251 1252 if (!have_identity) 1253 ask_filename(pw, "Enter file in which the key is"); 1254 if (stat(identity_file, &st) < 0) { 1255 perror(identity_file); 1256 exit(1); 1257 } 1258 /* Try to load the file with empty passphrase. */ 1259 r = sshkey_load_private(identity_file, "", &private, &comment); 1260 if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) { 1261 if (identity_passphrase) 1262 old_passphrase = xstrdup(identity_passphrase); 1263 else 1264 old_passphrase = 1265 read_passphrase("Enter old passphrase: ", 1266 RP_ALLOW_STDIN); 1267 r = sshkey_load_private(identity_file, old_passphrase, 1268 &private, &comment); 1269 explicit_bzero(old_passphrase, strlen(old_passphrase)); 1270 free(old_passphrase); 1271 if (r != 0) 1272 goto badkey; 1273 } else if (r != 0) { 1274 badkey: 1275 fprintf(stderr, "Failed to load key \"%s\": %s\n", 1276 identity_file, ssh_err(r)); 1277 exit(1); 1278 } 1279 if (comment) 1280 printf("Key has comment '%s'\n", comment); 1281 1282 /* Ask the new passphrase (twice). */ 1283 if (identity_new_passphrase) { 1284 passphrase1 = xstrdup(identity_new_passphrase); 1285 passphrase2 = NULL; 1286 } else { 1287 passphrase1 = 1288 read_passphrase("Enter new passphrase (empty for no " 1289 "passphrase): ", RP_ALLOW_STDIN); 1290 passphrase2 = read_passphrase("Enter same passphrase again: ", 1291 RP_ALLOW_STDIN); 1292 1293 /* Verify that they are the same. */ 1294 if (strcmp(passphrase1, passphrase2) != 0) { 1295 explicit_bzero(passphrase1, strlen(passphrase1)); 1296 explicit_bzero(passphrase2, strlen(passphrase2)); 1297 free(passphrase1); 1298 free(passphrase2); 1299 printf("Pass phrases do not match. Try again.\n"); 1300 exit(1); 1301 } 1302 /* Destroy the other copy. */ 1303 explicit_bzero(passphrase2, strlen(passphrase2)); 1304 free(passphrase2); 1305 } 1306 1307 /* Save the file using the new passphrase. */ 1308 if ((r = sshkey_save_private(private, identity_file, passphrase1, 1309 comment, use_new_format, new_format_cipher, rounds)) != 0) { 1310 printf("Saving key \"%s\" failed: %s.\n", 1311 identity_file, ssh_err(r)); 1312 explicit_bzero(passphrase1, strlen(passphrase1)); 1313 free(passphrase1); 1314 sshkey_free(private); 1315 free(comment); 1316 exit(1); 1317 } 1318 /* Destroy the passphrase and the copy of the key in memory. */ 1319 explicit_bzero(passphrase1, strlen(passphrase1)); 1320 free(passphrase1); 1321 sshkey_free(private); /* Destroys contents */ 1322 free(comment); 1323 1324 printf("Your identification has been saved with the new passphrase.\n"); 1325 exit(0); 1326} 1327 1328/* 1329 * Print the SSHFP RR. 1330 */ 1331static int 1332do_print_resource_record(struct passwd *pw, char *fname, char *hname) 1333{ 1334 struct sshkey *public; 1335 char *comment = NULL; 1336 struct stat st; 1337 int r; 1338 1339 if (fname == NULL) 1340 fatal("%s: no filename", __func__); 1341 if (stat(fname, &st) < 0) { 1342 if (errno == ENOENT) 1343 return 0; 1344 perror(fname); 1345 exit(1); 1346 } 1347 if ((r = sshkey_load_public(fname, &public, &comment)) != 0) { 1348 printf("Failed to read v2 public key from \"%s\": %s.\n", 1349 fname, ssh_err(r)); 1350 exit(1); 1351 } 1352 export_dns_rr(hname, public, stdout, print_generic); 1353 sshkey_free(public); 1354 free(comment); 1355 return 1; 1356} 1357 1358/* 1359 * Change the comment of a private key file. 1360 */ 1361static void 1362do_change_comment(struct passwd *pw) 1363{ 1364 char new_comment[1024], *comment, *passphrase; 1365 struct sshkey *private; 1366 struct sshkey *public; 1367 struct stat st; 1368 FILE *f; 1369 int r, fd; 1370 1371 if (!have_identity) 1372 ask_filename(pw, "Enter file in which the key is"); 1373 if (stat(identity_file, &st) < 0) { 1374 perror(identity_file); 1375 exit(1); 1376 } 1377 if ((r = sshkey_load_private(identity_file, "", 1378 &private, &comment)) == 0) 1379 passphrase = xstrdup(""); 1380 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) { 1381 printf("Cannot load private key \"%s\": %s.\n", 1382 identity_file, ssh_err(r)); 1383 exit(1); 1384 } else { 1385 if (identity_passphrase) 1386 passphrase = xstrdup(identity_passphrase); 1387 else if (identity_new_passphrase) 1388 passphrase = xstrdup(identity_new_passphrase); 1389 else 1390 passphrase = read_passphrase("Enter passphrase: ", 1391 RP_ALLOW_STDIN); 1392 /* Try to load using the passphrase. */ 1393 if ((r = sshkey_load_private(identity_file, passphrase, 1394 &private, &comment)) != 0) { 1395 explicit_bzero(passphrase, strlen(passphrase)); 1396 free(passphrase); 1397 printf("Cannot load private key \"%s\": %s.\n", 1398 identity_file, ssh_err(r)); 1399 exit(1); 1400 } 1401 } 1402 if (private->type != KEY_RSA1) { 1403 fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); 1404 sshkey_free(private); 1405 exit(1); 1406 } 1407 printf("Key now has comment '%s'\n", comment); 1408 1409 if (identity_comment) { 1410 strlcpy(new_comment, identity_comment, sizeof(new_comment)); 1411 } else { 1412 printf("Enter new comment: "); 1413 fflush(stdout); 1414 if (!fgets(new_comment, sizeof(new_comment), stdin)) { 1415 explicit_bzero(passphrase, strlen(passphrase)); 1416 sshkey_free(private); 1417 exit(1); 1418 } 1419 new_comment[strcspn(new_comment, "\n")] = '\0'; 1420 } 1421 1422 /* Save the file using the new passphrase. */ 1423 if ((r = sshkey_save_private(private, identity_file, passphrase, 1424 new_comment, use_new_format, new_format_cipher, rounds)) != 0) { 1425 printf("Saving key \"%s\" failed: %s\n", 1426 identity_file, ssh_err(r)); 1427 explicit_bzero(passphrase, strlen(passphrase)); 1428 free(passphrase); 1429 sshkey_free(private); 1430 free(comment); 1431 exit(1); 1432 } 1433 explicit_bzero(passphrase, strlen(passphrase)); 1434 free(passphrase); 1435 if ((r = sshkey_from_private(private, &public)) != 0) 1436 fatal("key_from_private failed: %s", ssh_err(r)); 1437 sshkey_free(private); 1438 1439 strlcat(identity_file, ".pub", sizeof(identity_file)); 1440 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 1441 if (fd == -1) { 1442 printf("Could not save your public key in %s\n", identity_file); 1443 exit(1); 1444 } 1445 f = fdopen(fd, "w"); 1446 if (f == NULL) { 1447 printf("fdopen %s failed\n", identity_file); 1448 exit(1); 1449 } 1450 if ((r = sshkey_write(public, f)) != 0) 1451 fprintf(stderr, "write key failed: %s\n", ssh_err(r)); 1452 sshkey_free(public); 1453 fprintf(f, " %s\n", new_comment); 1454 fclose(f); 1455 1456 free(comment); 1457 1458 printf("The comment in your key file has been changed.\n"); 1459 exit(0); 1460} 1461 1462static const char * 1463fmt_validity(u_int64_t valid_from, u_int64_t valid_to) 1464{ 1465 char from[32], to[32]; 1466 static char ret[64]; 1467 time_t tt; 1468 struct tm *tm; 1469 1470 *from = *to = '\0'; 1471 if (valid_from == 0 && valid_to == 0xffffffffffffffffULL) 1472 return "forever"; 1473 1474 if (valid_from != 0) { 1475 /* XXX revisit INT_MAX in 2038 :) */ 1476 tt = valid_from > INT_MAX ? INT_MAX : valid_from; 1477 tm = localtime(&tt); 1478 strftime(from, sizeof(from), "%Y-%m-%dT%H:%M:%S", tm); 1479 } 1480 if (valid_to != 0xffffffffffffffffULL) { 1481 /* XXX revisit INT_MAX in 2038 :) */ 1482 tt = valid_to > INT_MAX ? INT_MAX : valid_to; 1483 tm = localtime(&tt); 1484 strftime(to, sizeof(to), "%Y-%m-%dT%H:%M:%S", tm); 1485 } 1486 1487 if (valid_from == 0) { 1488 snprintf(ret, sizeof(ret), "before %s", to); 1489 return ret; 1490 } 1491 if (valid_to == 0xffffffffffffffffULL) { 1492 snprintf(ret, sizeof(ret), "after %s", from); 1493 return ret; 1494 } 1495 1496 snprintf(ret, sizeof(ret), "from %s to %s", from, to); 1497 return ret; 1498} 1499 1500static void 1501add_flag_option(struct sshbuf *c, const char *name) 1502{ 1503 int r; 1504 1505 debug3("%s: %s", __func__, name); 1506 if ((r = sshbuf_put_cstring(c, name)) != 0 || 1507 (r = sshbuf_put_string(c, NULL, 0)) != 0) 1508 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1509} 1510 1511static void 1512add_string_option(struct sshbuf *c, const char *name, const char *value) 1513{ 1514 struct sshbuf *b; 1515 int r; 1516 1517 debug3("%s: %s=%s", __func__, name, value); 1518 if ((b = sshbuf_new()) == NULL) 1519 fatal("%s: sshbuf_new failed", __func__); 1520 if ((r = sshbuf_put_cstring(b, value)) != 0 || 1521 (r = sshbuf_put_cstring(c, name)) != 0 || 1522 (r = sshbuf_put_stringb(c, b)) != 0) 1523 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1524 1525 sshbuf_free(b); 1526} 1527 1528#define OPTIONS_CRITICAL 1 1529#define OPTIONS_EXTENSIONS 2 1530static void 1531prepare_options_buf(struct sshbuf *c, int which) 1532{ 1533 sshbuf_reset(c); 1534 if ((which & OPTIONS_CRITICAL) != 0 && 1535 certflags_command != NULL) 1536 add_string_option(c, "force-command", certflags_command); 1537 if ((which & OPTIONS_EXTENSIONS) != 0 && 1538 (certflags_flags & CERTOPT_X_FWD) != 0) 1539 add_flag_option(c, "permit-X11-forwarding"); 1540 if ((which & OPTIONS_EXTENSIONS) != 0 && 1541 (certflags_flags & CERTOPT_AGENT_FWD) != 0) 1542 add_flag_option(c, "permit-agent-forwarding"); 1543 if ((which & OPTIONS_EXTENSIONS) != 0 && 1544 (certflags_flags & CERTOPT_PORT_FWD) != 0) 1545 add_flag_option(c, "permit-port-forwarding"); 1546 if ((which & OPTIONS_EXTENSIONS) != 0 && 1547 (certflags_flags & CERTOPT_PTY) != 0) 1548 add_flag_option(c, "permit-pty"); 1549 if ((which & OPTIONS_EXTENSIONS) != 0 && 1550 (certflags_flags & CERTOPT_USER_RC) != 0) 1551 add_flag_option(c, "permit-user-rc"); 1552 if ((which & OPTIONS_CRITICAL) != 0 && 1553 certflags_src_addr != NULL) 1554 add_string_option(c, "source-address", certflags_src_addr); 1555} 1556 1557static struct sshkey * 1558load_pkcs11_key(char *path) 1559{ 1560#ifdef ENABLE_PKCS11 1561 struct sshkey **keys = NULL, *public, *private = NULL; 1562 int r, i, nkeys; 1563 1564 if ((r = sshkey_load_public(path, &public, NULL)) != 0) 1565 fatal("Couldn't load CA public key \"%s\": %s", 1566 path, ssh_err(r)); 1567 1568 nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys); 1569 debug3("%s: %d keys", __func__, nkeys); 1570 if (nkeys <= 0) 1571 fatal("cannot read public key from pkcs11"); 1572 for (i = 0; i < nkeys; i++) { 1573 if (sshkey_equal_public(public, keys[i])) { 1574 private = keys[i]; 1575 continue; 1576 } 1577 sshkey_free(keys[i]); 1578 } 1579 free(keys); 1580 sshkey_free(public); 1581 return private; 1582#else 1583 fatal("no pkcs11 support"); 1584#endif /* ENABLE_PKCS11 */ 1585} 1586 1587static void 1588do_ca_sign(struct passwd *pw, int argc, char **argv) 1589{ 1590 int r, i, fd; 1591 u_int n; 1592 struct sshkey *ca, *public; 1593 char *otmp, *tmp, *cp, *out, *comment, **plist = NULL; 1594 FILE *f; 1595 int v00 = 0; /* legacy keys */ 1596 1597 if (key_type_name != NULL) { 1598 switch (sshkey_type_from_name(key_type_name)) { 1599 case KEY_RSA_CERT_V00: 1600 case KEY_DSA_CERT_V00: 1601 v00 = 1; 1602 break; 1603 case KEY_UNSPEC: 1604 if (strcasecmp(key_type_name, "v00") == 0) { 1605 v00 = 1; 1606 break; 1607 } else if (strcasecmp(key_type_name, "v01") == 0) 1608 break; 1609 /* FALLTHROUGH */ 1610 default: 1611 fprintf(stderr, "unknown key type %s\n", key_type_name); 1612 exit(1); 1613 } 1614 } 1615 1616#ifdef ENABLE_PKCS11 1617 pkcs11_init(1); 1618#endif 1619 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 1620 if (pkcs11provider != NULL) { 1621 if ((ca = load_pkcs11_key(tmp)) == NULL) 1622 fatal("No PKCS#11 key matching %s found", ca_key_path); 1623 } else 1624 ca = load_identity(tmp); 1625 free(tmp); 1626 1627 for (i = 0; i < argc; i++) { 1628 /* Split list of principals */ 1629 n = 0; 1630 if (cert_principals != NULL) { 1631 otmp = tmp = xstrdup(cert_principals); 1632 plist = NULL; 1633 for (; (cp = strsep(&tmp, ",")) != NULL; n++) { 1634 plist = xrealloc(plist, n + 1, sizeof(*plist)); 1635 if (*(plist[n] = xstrdup(cp)) == '\0') 1636 fatal("Empty principal name"); 1637 } 1638 free(otmp); 1639 } 1640 1641 tmp = tilde_expand_filename(argv[i], pw->pw_uid); 1642 if ((r = sshkey_load_public(tmp, &public, &comment)) != 0) 1643 fatal("%s: unable to open \"%s\": %s", 1644 __func__, tmp, ssh_err(r)); 1645 if (public->type != KEY_RSA && public->type != KEY_DSA && 1646 public->type != KEY_ECDSA && public->type != KEY_ED25519) 1647 fatal("%s: key \"%s\" type %s cannot be certified", 1648 __func__, tmp, sshkey_type(public)); 1649 1650 /* Prepare certificate to sign */ 1651 if ((r = sshkey_to_certified(public, v00)) != 0) 1652 fatal("Could not upgrade key %s to certificate: %s", 1653 tmp, ssh_err(r)); 1654 public->cert->type = cert_key_type; 1655 public->cert->serial = (u_int64_t)cert_serial; 1656 public->cert->key_id = xstrdup(cert_key_id); 1657 public->cert->nprincipals = n; 1658 public->cert->principals = plist; 1659 public->cert->valid_after = cert_valid_from; 1660 public->cert->valid_before = cert_valid_to; 1661 if (v00) { 1662 prepare_options_buf(public->cert->critical, 1663 OPTIONS_CRITICAL|OPTIONS_EXTENSIONS); 1664 } else { 1665 prepare_options_buf(public->cert->critical, 1666 OPTIONS_CRITICAL); 1667 prepare_options_buf(public->cert->extensions, 1668 OPTIONS_EXTENSIONS); 1669 } 1670 if ((r = sshkey_from_private(ca, 1671 &public->cert->signature_key)) != 0) 1672 fatal("key_from_private (ca key): %s", ssh_err(r)); 1673 1674 if (sshkey_certify(public, ca) != 0) 1675 fatal("Couldn't not certify key %s", tmp); 1676 1677 if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0) 1678 *cp = '\0'; 1679 xasprintf(&out, "%s-cert.pub", tmp); 1680 free(tmp); 1681 1682 if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 1683 fatal("Could not open \"%s\" for writing: %s", out, 1684 strerror(errno)); 1685 if ((f = fdopen(fd, "w")) == NULL) 1686 fatal("%s: fdopen: %s", __func__, strerror(errno)); 1687 if ((r = sshkey_write(public, f)) != 0) 1688 fatal("Could not write certified key to %s: %s", 1689 out, ssh_err(r)); 1690 fprintf(f, " %s\n", comment); 1691 fclose(f); 1692 1693 if (!quiet) { 1694 logit("Signed %s key %s: id \"%s\" serial %llu%s%s " 1695 "valid %s", sshkey_cert_type(public), 1696 out, public->cert->key_id, 1697 (unsigned long long)public->cert->serial, 1698 cert_principals != NULL ? " for " : "", 1699 cert_principals != NULL ? cert_principals : "", 1700 fmt_validity(cert_valid_from, cert_valid_to)); 1701 } 1702 1703 sshkey_free(public); 1704 free(out); 1705 } 1706#ifdef ENABLE_PKCS11 1707 pkcs11_terminate(); 1708#endif 1709 exit(0); 1710} 1711 1712static u_int64_t 1713parse_relative_time(const char *s, time_t now) 1714{ 1715 int64_t mul, secs; 1716 1717 mul = *s == '-' ? -1 : 1; 1718 1719 if ((secs = convtime(s + 1)) == -1) 1720 fatal("Invalid relative certificate time %s", s); 1721 if (mul == -1 && secs > now) 1722 fatal("Certificate time %s cannot be represented", s); 1723 return now + (u_int64_t)(secs * mul); 1724} 1725 1726static u_int64_t 1727parse_absolute_time(const char *s) 1728{ 1729 struct tm tm; 1730 time_t tt; 1731 char buf[32], *fmt; 1732 1733 /* 1734 * POSIX strptime says "The application shall ensure that there 1735 * is white-space or other non-alphanumeric characters between 1736 * any two conversion specifications" so arrange things this way. 1737 */ 1738 switch (strlen(s)) { 1739 case 8: 1740 fmt = "%Y-%m-%d"; 1741 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6); 1742 break; 1743 case 14: 1744 fmt = "%Y-%m-%dT%H:%M:%S"; 1745 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s", 1746 s, s + 4, s + 6, s + 8, s + 10, s + 12); 1747 break; 1748 default: 1749 fatal("Invalid certificate time format %s", s); 1750 } 1751 1752 memset(&tm, 0, sizeof(tm)); 1753 if (strptime(buf, fmt, &tm) == NULL) 1754 fatal("Invalid certificate time %s", s); 1755 if ((tt = mktime(&tm)) < 0) 1756 fatal("Certificate time %s cannot be represented", s); 1757 return (u_int64_t)tt; 1758} 1759 1760static void 1761parse_cert_times(char *timespec) 1762{ 1763 char *from, *to; 1764 time_t now = time(NULL); 1765 int64_t secs; 1766 1767 /* +timespec relative to now */ 1768 if (*timespec == '+' && strchr(timespec, ':') == NULL) { 1769 if ((secs = convtime(timespec + 1)) == -1) 1770 fatal("Invalid relative certificate life %s", timespec); 1771 cert_valid_to = now + secs; 1772 /* 1773 * Backdate certificate one minute to avoid problems on hosts 1774 * with poorly-synchronised clocks. 1775 */ 1776 cert_valid_from = ((now - 59)/ 60) * 60; 1777 return; 1778 } 1779 1780 /* 1781 * from:to, where 1782 * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS 1783 * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS 1784 */ 1785 from = xstrdup(timespec); 1786 to = strchr(from, ':'); 1787 if (to == NULL || from == to || *(to + 1) == '\0') 1788 fatal("Invalid certificate life specification %s", timespec); 1789 *to++ = '\0'; 1790 1791 if (*from == '-' || *from == '+') 1792 cert_valid_from = parse_relative_time(from, now); 1793 else 1794 cert_valid_from = parse_absolute_time(from); 1795 1796 if (*to == '-' || *to == '+') 1797 cert_valid_to = parse_relative_time(to, now); 1798 else 1799 cert_valid_to = parse_absolute_time(to); 1800 1801 if (cert_valid_to <= cert_valid_from) 1802 fatal("Empty certificate validity interval"); 1803 free(from); 1804} 1805 1806static void 1807add_cert_option(char *opt) 1808{ 1809 char *val; 1810 1811 if (strcasecmp(opt, "clear") == 0) 1812 certflags_flags = 0; 1813 else if (strcasecmp(opt, "no-x11-forwarding") == 0) 1814 certflags_flags &= ~CERTOPT_X_FWD; 1815 else if (strcasecmp(opt, "permit-x11-forwarding") == 0) 1816 certflags_flags |= CERTOPT_X_FWD; 1817 else if (strcasecmp(opt, "no-agent-forwarding") == 0) 1818 certflags_flags &= ~CERTOPT_AGENT_FWD; 1819 else if (strcasecmp(opt, "permit-agent-forwarding") == 0) 1820 certflags_flags |= CERTOPT_AGENT_FWD; 1821 else if (strcasecmp(opt, "no-port-forwarding") == 0) 1822 certflags_flags &= ~CERTOPT_PORT_FWD; 1823 else if (strcasecmp(opt, "permit-port-forwarding") == 0) 1824 certflags_flags |= CERTOPT_PORT_FWD; 1825 else if (strcasecmp(opt, "no-pty") == 0) 1826 certflags_flags &= ~CERTOPT_PTY; 1827 else if (strcasecmp(opt, "permit-pty") == 0) 1828 certflags_flags |= CERTOPT_PTY; 1829 else if (strcasecmp(opt, "no-user-rc") == 0) 1830 certflags_flags &= ~CERTOPT_USER_RC; 1831 else if (strcasecmp(opt, "permit-user-rc") == 0) 1832 certflags_flags |= CERTOPT_USER_RC; 1833 else if (strncasecmp(opt, "force-command=", 14) == 0) { 1834 val = opt + 14; 1835 if (*val == '\0') 1836 fatal("Empty force-command option"); 1837 if (certflags_command != NULL) 1838 fatal("force-command already specified"); 1839 certflags_command = xstrdup(val); 1840 } else if (strncasecmp(opt, "source-address=", 15) == 0) { 1841 val = opt + 15; 1842 if (*val == '\0') 1843 fatal("Empty source-address option"); 1844 if (certflags_src_addr != NULL) 1845 fatal("source-address already specified"); 1846 if (addr_match_cidr_list(NULL, val) != 0) 1847 fatal("Invalid source-address list"); 1848 certflags_src_addr = xstrdup(val); 1849 } else 1850 fatal("Unsupported certificate option \"%s\"", opt); 1851} 1852 1853static void 1854show_options(struct sshbuf *optbuf, int v00, int in_critical) 1855{ 1856 char *name, *arg; 1857 struct sshbuf *options, *option = NULL; 1858 int r; 1859 1860 if ((options = sshbuf_fromb(optbuf)) == NULL) 1861 fatal("%s: sshbuf_fromb failed", __func__); 1862 while (sshbuf_len(options) != 0) { 1863 sshbuf_free(option); 1864 option = NULL; 1865 if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 || 1866 (r = sshbuf_froms(options, &option)) != 0) 1867 fatal("%s: buffer error: %s", __func__, ssh_err(r)); 1868 printf(" %s", name); 1869 if ((v00 || !in_critical) && 1870 (strcmp(name, "permit-X11-forwarding") == 0 || 1871 strcmp(name, "permit-agent-forwarding") == 0 || 1872 strcmp(name, "permit-port-forwarding") == 0 || 1873 strcmp(name, "permit-pty") == 0 || 1874 strcmp(name, "permit-user-rc") == 0)) 1875 printf("\n"); 1876 else if ((v00 || in_critical) && 1877 (strcmp(name, "force-command") == 0 || 1878 strcmp(name, "source-address") == 0)) { 1879 if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0) 1880 fatal("%s: buffer error: %s", 1881 __func__, ssh_err(r)); 1882 printf(" %s\n", arg); 1883 free(arg); 1884 } else { 1885 printf(" UNKNOWN OPTION (len %zu)\n", 1886 sshbuf_len(option)); 1887 sshbuf_reset(option); 1888 } 1889 free(name); 1890 if (sshbuf_len(option) != 0) 1891 fatal("Option corrupt: extra data at end"); 1892 } 1893 sshbuf_free(option); 1894 sshbuf_free(options); 1895} 1896 1897static void 1898do_show_cert(struct passwd *pw) 1899{ 1900 struct sshkey *key; 1901 struct stat st; 1902 char *key_fp, *ca_fp; 1903 u_int i, v00; 1904 int r; 1905 1906 if (!have_identity) 1907 ask_filename(pw, "Enter file in which the key is"); 1908 if (stat(identity_file, &st) < 0) 1909 fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); 1910 if ((r = sshkey_load_public(identity_file, &key, NULL)) != 0) 1911 fatal("Cannot load public key \"%s\": %s", 1912 identity_file, ssh_err(r)); 1913 if (!sshkey_is_cert(key)) 1914 fatal("%s is not a certificate", identity_file); 1915 v00 = key->type == KEY_RSA_CERT_V00 || key->type == KEY_DSA_CERT_V00; 1916 1917 key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT); 1918 ca_fp = sshkey_fingerprint(key->cert->signature_key, 1919 fingerprint_hash, SSH_FP_DEFAULT); 1920 if (key_fp == NULL || ca_fp == NULL) 1921 fatal("%s: sshkey_fingerprint fail", __func__); 1922 1923 printf("%s:\n", identity_file); 1924 printf(" Type: %s %s certificate\n", sshkey_ssh_name(key), 1925 sshkey_cert_type(key)); 1926 printf(" Public key: %s %s\n", sshkey_type(key), key_fp); 1927 printf(" Signing CA: %s %s\n", 1928 sshkey_type(key->cert->signature_key), ca_fp); 1929 printf(" Key ID: \"%s\"\n", key->cert->key_id); 1930 if (!v00) { 1931 printf(" Serial: %llu\n", 1932 (unsigned long long)key->cert->serial); 1933 } 1934 printf(" Valid: %s\n", 1935 fmt_validity(key->cert->valid_after, key->cert->valid_before)); 1936 printf(" Principals: "); 1937 if (key->cert->nprincipals == 0) 1938 printf("(none)\n"); 1939 else { 1940 for (i = 0; i < key->cert->nprincipals; i++) 1941 printf("\n %s", 1942 key->cert->principals[i]); 1943 printf("\n"); 1944 } 1945 printf(" Critical Options: "); 1946 if (sshbuf_len(key->cert->critical) == 0) 1947 printf("(none)\n"); 1948 else { 1949 printf("\n"); 1950 show_options(key->cert->critical, v00, 1); 1951 } 1952 if (!v00) { 1953 printf(" Extensions: "); 1954 if (sshbuf_len(key->cert->extensions) == 0) 1955 printf("(none)\n"); 1956 else { 1957 printf("\n"); 1958 show_options(key->cert->extensions, v00, 0); 1959 } 1960 } 1961 exit(0); 1962} 1963 1964static void 1965load_krl(const char *path, struct ssh_krl **krlp) 1966{ 1967 struct sshbuf *krlbuf; 1968 int r, fd; 1969 1970 if ((krlbuf = sshbuf_new()) == NULL) 1971 fatal("sshbuf_new failed"); 1972 if ((fd = open(path, O_RDONLY)) == -1) 1973 fatal("open %s: %s", path, strerror(errno)); 1974 if ((r = sshkey_load_file(fd, krlbuf)) != 0) 1975 fatal("Unable to load KRL: %s", ssh_err(r)); 1976 close(fd); 1977 /* XXX check sigs */ 1978 if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 || 1979 *krlp == NULL) 1980 fatal("Invalid KRL file: %s", ssh_err(r)); 1981 sshbuf_free(krlbuf); 1982} 1983 1984static void 1985update_krl_from_file(struct passwd *pw, const char *file, int wild_ca, 1986 const struct sshkey *ca, struct ssh_krl *krl) 1987{ 1988 struct sshkey *key = NULL; 1989 u_long lnum = 0; 1990 char *path, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES]; 1991 unsigned long long serial, serial2; 1992 int i, was_explicit_key, was_sha1, r; 1993 FILE *krl_spec; 1994 1995 path = tilde_expand_filename(file, pw->pw_uid); 1996 if (strcmp(path, "-") == 0) { 1997 krl_spec = stdin; 1998 free(path); 1999 path = xstrdup("(standard input)"); 2000 } else if ((krl_spec = fopen(path, "r")) == NULL) 2001 fatal("fopen %s: %s", path, strerror(errno)); 2002 2003 if (!quiet) 2004 printf("Revoking from %s\n", path); 2005 while (read_keyfile_line(krl_spec, path, line, sizeof(line), 2006 &lnum) == 0) { 2007 was_explicit_key = was_sha1 = 0; 2008 cp = line + strspn(line, " \t"); 2009 /* Trim trailing space, comments and strip \n */ 2010 for (i = 0, r = -1; cp[i] != '\0'; i++) { 2011 if (cp[i] == '#' || cp[i] == '\n') { 2012 cp[i] = '\0'; 2013 break; 2014 } 2015 if (cp[i] == ' ' || cp[i] == '\t') { 2016 /* Remember the start of a span of whitespace */ 2017 if (r == -1) 2018 r = i; 2019 } else 2020 r = -1; 2021 } 2022 if (r != -1) 2023 cp[r] = '\0'; 2024 if (*cp == '\0') 2025 continue; 2026 if (strncasecmp(cp, "serial:", 7) == 0) { 2027 if (ca == NULL && !wild_ca) { 2028 fatal("revoking certificates by serial number " 2029 "requires specification of a CA key"); 2030 } 2031 cp += 7; 2032 cp = cp + strspn(cp, " \t"); 2033 errno = 0; 2034 serial = strtoull(cp, &ep, 0); 2035 if (*cp == '\0' || (*ep != '\0' && *ep != '-')) 2036 fatal("%s:%lu: invalid serial \"%s\"", 2037 path, lnum, cp); 2038 if (errno == ERANGE && serial == ULLONG_MAX) 2039 fatal("%s:%lu: serial out of range", 2040 path, lnum); 2041 serial2 = serial; 2042 if (*ep == '-') { 2043 cp = ep + 1; 2044 errno = 0; 2045 serial2 = strtoull(cp, &ep, 0); 2046 if (*cp == '\0' || *ep != '\0') 2047 fatal("%s:%lu: invalid serial \"%s\"", 2048 path, lnum, cp); 2049 if (errno == ERANGE && serial2 == ULLONG_MAX) 2050 fatal("%s:%lu: serial out of range", 2051 path, lnum); 2052 if (serial2 <= serial) 2053 fatal("%s:%lu: invalid serial range " 2054 "%llu:%llu", path, lnum, 2055 (unsigned long long)serial, 2056 (unsigned long long)serial2); 2057 } 2058 if (ssh_krl_revoke_cert_by_serial_range(krl, 2059 ca, serial, serial2) != 0) { 2060 fatal("%s: revoke serial failed", 2061 __func__); 2062 } 2063 } else if (strncasecmp(cp, "id:", 3) == 0) { 2064 if (ca == NULL && !wild_ca) { 2065 fatal("revoking certificates by key ID " 2066 "requires specification of a CA key"); 2067 } 2068 cp += 3; 2069 cp = cp + strspn(cp, " \t"); 2070 if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0) 2071 fatal("%s: revoke key ID failed", __func__); 2072 } else { 2073 if (strncasecmp(cp, "key:", 4) == 0) { 2074 cp += 4; 2075 cp = cp + strspn(cp, " \t"); 2076 was_explicit_key = 1; 2077 } else if (strncasecmp(cp, "sha1:", 5) == 0) { 2078 cp += 5; 2079 cp = cp + strspn(cp, " \t"); 2080 was_sha1 = 1; 2081 } else { 2082 /* 2083 * Just try to process the line as a key. 2084 * Parsing will fail if it isn't. 2085 */ 2086 } 2087 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 2088 fatal("key_new"); 2089 if ((r = sshkey_read(key, &cp)) != 0) 2090 fatal("%s:%lu: invalid key: %s", 2091 path, lnum, ssh_err(r)); 2092 if (was_explicit_key) 2093 r = ssh_krl_revoke_key_explicit(krl, key); 2094 else if (was_sha1) 2095 r = ssh_krl_revoke_key_sha1(krl, key); 2096 else 2097 r = ssh_krl_revoke_key(krl, key); 2098 if (r != 0) 2099 fatal("%s: revoke key failed: %s", 2100 __func__, ssh_err(r)); 2101 sshkey_free(key); 2102 } 2103 } 2104 if (strcmp(path, "-") != 0) 2105 fclose(krl_spec); 2106 free(path); 2107} 2108 2109static void 2110do_gen_krl(struct passwd *pw, int updating, int argc, char **argv) 2111{ 2112 struct ssh_krl *krl; 2113 struct stat sb; 2114 struct sshkey *ca = NULL; 2115 int fd, i, r, wild_ca = 0; 2116 char *tmp; 2117 struct sshbuf *kbuf; 2118 2119 if (*identity_file == '\0') 2120 fatal("KRL generation requires an output file"); 2121 if (stat(identity_file, &sb) == -1) { 2122 if (errno != ENOENT) 2123 fatal("Cannot access KRL \"%s\": %s", 2124 identity_file, strerror(errno)); 2125 if (updating) 2126 fatal("KRL \"%s\" does not exist", identity_file); 2127 } 2128 if (ca_key_path != NULL) { 2129 if (strcasecmp(ca_key_path, "none") == 0) 2130 wild_ca = 1; 2131 else { 2132 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); 2133 if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) 2134 fatal("Cannot load CA public key %s: %s", 2135 tmp, ssh_err(r)); 2136 free(tmp); 2137 } 2138 } 2139 2140 if (updating) 2141 load_krl(identity_file, &krl); 2142 else if ((krl = ssh_krl_init()) == NULL) 2143 fatal("couldn't create KRL"); 2144 2145 if (cert_serial != 0) 2146 ssh_krl_set_version(krl, cert_serial); 2147 if (identity_comment != NULL) 2148 ssh_krl_set_comment(krl, identity_comment); 2149 2150 for (i = 0; i < argc; i++) 2151 update_krl_from_file(pw, argv[i], wild_ca, ca, krl); 2152 2153 if ((kbuf = sshbuf_new()) == NULL) 2154 fatal("sshbuf_new failed"); 2155 if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0) 2156 fatal("Couldn't generate KRL"); 2157 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) 2158 fatal("open %s: %s", identity_file, strerror(errno)); 2159 if (atomicio(vwrite, fd, (void *)sshbuf_ptr(kbuf), sshbuf_len(kbuf)) != 2160 sshbuf_len(kbuf)) 2161 fatal("write %s: %s", identity_file, strerror(errno)); 2162 close(fd); 2163 sshbuf_free(kbuf); 2164 ssh_krl_free(krl); 2165 if (ca != NULL) 2166 sshkey_free(ca); 2167} 2168 2169static void 2170do_check_krl(struct passwd *pw, int argc, char **argv) 2171{ 2172 int i, r, ret = 0; 2173 char *comment; 2174 struct ssh_krl *krl; 2175 struct sshkey *k; 2176 2177 if (*identity_file == '\0') 2178 fatal("KRL checking requires an input file"); 2179 load_krl(identity_file, &krl); 2180 for (i = 0; i < argc; i++) { 2181 if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0) 2182 fatal("Cannot load public key %s: %s", 2183 argv[i], ssh_err(r)); 2184 r = ssh_krl_check_key(krl, k); 2185 printf("%s%s%s%s: %s\n", argv[i], 2186 *comment ? " (" : "", comment, *comment ? ")" : "", 2187 r == 0 ? "ok" : "REVOKED"); 2188 if (r != 0) 2189 ret = 1; 2190 sshkey_free(k); 2191 free(comment); 2192 } 2193 ssh_krl_free(krl); 2194 exit(ret); 2195} 2196 2197static void 2198usage(void) 2199{ 2200 fprintf(stderr, 2201 "usage: ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa | rsa1]\n" 2202 " [-N new_passphrase] [-C comment] [-f output_keyfile]\n" 2203 " ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]\n" 2204 " ssh-keygen -i [-m key_format] [-f input_keyfile]\n" 2205 " ssh-keygen -e [-m key_format] [-f input_keyfile]\n" 2206 " ssh-keygen -y [-f input_keyfile]\n" 2207 " ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]\n" 2208 " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n" 2209 " ssh-keygen -B [-f input_keyfile]\n"); 2210#ifdef ENABLE_PKCS11 2211 fprintf(stderr, 2212 " ssh-keygen -D pkcs11\n"); 2213#endif 2214 fprintf(stderr, 2215 " ssh-keygen -F hostname [-f known_hosts_file] [-l]\n" 2216 " ssh-keygen -H [-f known_hosts_file]\n" 2217 " ssh-keygen -R hostname [-f known_hosts_file]\n" 2218 " ssh-keygen -r hostname [-f input_keyfile] [-g]\n" 2219 " ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n" 2220 " ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]\n" 2221 " [-j start_line] [-K checkpt] [-W generator]\n" 2222 " ssh-keygen -s ca_key -I certificate_identity [-h] [-n principals]\n" 2223 " [-O option] [-V validity_interval] [-z serial_number] file ...\n" 2224 " ssh-keygen -L [-f input_keyfile]\n" 2225 " ssh-keygen -A\n" 2226 " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n" 2227 " file ...\n" 2228 " ssh-keygen -Q -f krl_file file ...\n"); 2229 exit(1); 2230} 2231 2232/* 2233 * Main program for key management. 2234 */ 2235int 2236main(int argc, char **argv) 2237{ 2238 char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2; 2239 char *checkpoint = NULL; 2240 char out_file[PATH_MAX], *rr_hostname = NULL, *ep, *fp, *ra; 2241 struct sshkey *private, *public; 2242 struct passwd *pw; 2243 struct stat st; 2244 int r, opt, type, fd; 2245 u_int32_t memory = 0, generator_wanted = 0; 2246 int do_gen_candidates = 0, do_screen_candidates = 0; 2247 int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0; 2248 unsigned long start_lineno = 0, lines_to_process = 0; 2249 BIGNUM *start = NULL; 2250 FILE *f; 2251 const char *errstr; 2252 2253 extern int optind; 2254 extern char *optarg; 2255 2256 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 2257 sanitise_stdfd(); 2258 2259 __progname = ssh_get_progname(argv[0]); 2260 2261#ifdef WITH_OPENSSL 2262 OpenSSL_add_all_algorithms(); 2263#endif 2264 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); 2265 2266 seed_rng(); 2267 2268 /* we need this for the home * directory. */ 2269 pw = getpwuid(getuid()); 2270 if (!pw) { 2271 printf("No user exists for uid %lu\n", (u_long)getuid()); 2272 exit(1); 2273 } 2274 if (gethostname(hostname, sizeof(hostname)) < 0) { 2275 perror("gethostname"); 2276 exit(1); 2277 } 2278 2279 /* Remaining characters: UYdw */ 2280 while ((opt = getopt(argc, argv, "ABHLQXceghiklopquvxy" 2281 "C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Z:" 2282 "a:b:f:g:j:m:n:r:s:t:z:")) != -1) { 2283 switch (opt) { 2284 case 'A': 2285 gen_all_hostkeys = 1; 2286 break; 2287 case 'b': 2288 bits = (u_int32_t)strtonum(optarg, 256, 32768, &errstr); 2289 if (errstr) 2290 fatal("Bits has bad value %s (%s)", 2291 optarg, errstr); 2292 break; 2293 case 'E': 2294 fingerprint_hash = ssh_digest_alg_by_name(optarg); 2295 if (fingerprint_hash == -1) 2296 fatal("Invalid hash algorithm \"%s\"", optarg); 2297 break; 2298 case 'F': 2299 find_host = 1; 2300 rr_hostname = optarg; 2301 break; 2302 case 'H': 2303 hash_hosts = 1; 2304 break; 2305 case 'I': 2306 cert_key_id = optarg; 2307 break; 2308 case 'J': 2309 lines_to_process = strtoul(optarg, NULL, 10); 2310 break; 2311 case 'j': 2312 start_lineno = strtoul(optarg, NULL, 10); 2313 break; 2314 case 'R': 2315 delete_host = 1; 2316 rr_hostname = optarg; 2317 break; 2318 case 'L': 2319 show_cert = 1; 2320 break; 2321 case 'l': 2322 print_fingerprint = 1; 2323 break; 2324 case 'B': 2325 print_bubblebabble = 1; 2326 break; 2327 case 'm': 2328 if (strcasecmp(optarg, "RFC4716") == 0 || 2329 strcasecmp(optarg, "ssh2") == 0) { 2330 convert_format = FMT_RFC4716; 2331 break; 2332 } 2333 if (strcasecmp(optarg, "PKCS8") == 0) { 2334 convert_format = FMT_PKCS8; 2335 break; 2336 } 2337 if (strcasecmp(optarg, "PEM") == 0) { 2338 convert_format = FMT_PEM; 2339 break; 2340 } 2341 fatal("Unsupported conversion format \"%s\"", optarg); 2342 case 'n': 2343 cert_principals = optarg; 2344 break; 2345 case 'o': 2346 use_new_format = 1; 2347 break; 2348 case 'p': 2349 change_passphrase = 1; 2350 break; 2351 case 'c': 2352 change_comment = 1; 2353 break; 2354 case 'f': 2355 if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= 2356 sizeof(identity_file)) 2357 fatal("Identity filename too long"); 2358 have_identity = 1; 2359 break; 2360 case 'g': 2361 print_generic = 1; 2362 break; 2363 case 'P': 2364 identity_passphrase = optarg; 2365 break; 2366 case 'N': 2367 identity_new_passphrase = optarg; 2368 break; 2369 case 'Q': 2370 check_krl = 1; 2371 break; 2372 case 'O': 2373 add_cert_option(optarg); 2374 break; 2375 case 'Z': 2376 new_format_cipher = optarg; 2377 break; 2378 case 'C': 2379 identity_comment = optarg; 2380 break; 2381 case 'q': 2382 quiet = 1; 2383 break; 2384 case 'e': 2385 case 'x': 2386 /* export key */ 2387 convert_to = 1; 2388 break; 2389 case 'h': 2390 cert_key_type = SSH2_CERT_TYPE_HOST; 2391 certflags_flags = 0; 2392 break; 2393 case 'k': 2394 gen_krl = 1; 2395 break; 2396 case 'i': 2397 case 'X': 2398 /* import key */ 2399 convert_from = 1; 2400 break; 2401 case 'y': 2402 print_public = 1; 2403 break; 2404 case 's': 2405 ca_key_path = optarg; 2406 break; 2407 case 't': 2408 key_type_name = optarg; 2409 break; 2410 case 'D': 2411 pkcs11provider = optarg; 2412 break; 2413 case 'u': 2414 update_krl = 1; 2415 break; 2416 case 'v': 2417 if (log_level == SYSLOG_LEVEL_INFO) 2418 log_level = SYSLOG_LEVEL_DEBUG1; 2419 else { 2420 if (log_level >= SYSLOG_LEVEL_DEBUG1 && 2421 log_level < SYSLOG_LEVEL_DEBUG3) 2422 log_level++; 2423 } 2424 break; 2425 case 'r': 2426 rr_hostname = optarg; 2427 break; 2428 case 'W': 2429 generator_wanted = (u_int32_t)strtonum(optarg, 1, 2430 UINT_MAX, &errstr); 2431 if (errstr) 2432 fatal("Desired generator has bad value: %s (%s)", 2433 optarg, errstr); 2434 break; 2435 case 'a': 2436 rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr); 2437 if (errstr) 2438 fatal("Invalid number: %s (%s)", 2439 optarg, errstr); 2440 break; 2441#ifdef WITH_OPENSSL 2442 case 'M': 2443 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); 2444 if (errstr) 2445 fatal("Memory limit is %s: %s", errstr, optarg); 2446 break; 2447 case 'G': 2448 do_gen_candidates = 1; 2449 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 2450 sizeof(out_file)) 2451 fatal("Output filename too long"); 2452 break; 2453 case 'T': 2454 do_screen_candidates = 1; 2455 if (strlcpy(out_file, optarg, sizeof(out_file)) >= 2456 sizeof(out_file)) 2457 fatal("Output filename too long"); 2458 break; 2459 case 'K': 2460 if (strlen(optarg) >= PATH_MAX) 2461 fatal("Checkpoint filename too long"); 2462 checkpoint = xstrdup(optarg); 2463 break; 2464 case 'S': 2465 /* XXX - also compare length against bits */ 2466 if (BN_hex2bn(&start, optarg) == 0) 2467 fatal("Invalid start point."); 2468 break; 2469#endif /* WITH_OPENSSL */ 2470 case 'V': 2471 parse_cert_times(optarg); 2472 break; 2473 case 'z': 2474 errno = 0; 2475 cert_serial = strtoull(optarg, &ep, 10); 2476 if (*optarg < '0' || *optarg > '9' || *ep != '\0' || 2477 (errno == ERANGE && cert_serial == ULLONG_MAX)) 2478 fatal("Invalid serial number \"%s\"", optarg); 2479 break; 2480 case '?': 2481 default: 2482 usage(); 2483 } 2484 } 2485 2486 /* reinit */ 2487 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); 2488 2489 argv += optind; 2490 argc -= optind; 2491 2492 if (ca_key_path != NULL) { 2493 if (argc < 1 && !gen_krl) { 2494 printf("Too few arguments.\n"); 2495 usage(); 2496 } 2497 } else if (argc > 0 && !gen_krl && !check_krl) { 2498 printf("Too many arguments.\n"); 2499 usage(); 2500 } 2501 if (change_passphrase && change_comment) { 2502 printf("Can only have one of -p and -c.\n"); 2503 usage(); 2504 } 2505 if (print_fingerprint && (delete_host || hash_hosts)) { 2506 printf("Cannot use -l with -H or -R.\n"); 2507 usage(); 2508 } 2509 if (gen_krl) { 2510 do_gen_krl(pw, update_krl, argc, argv); 2511 return (0); 2512 } 2513 if (check_krl) { 2514 do_check_krl(pw, argc, argv); 2515 return (0); 2516 } 2517 if (ca_key_path != NULL) { 2518 if (cert_key_id == NULL) 2519 fatal("Must specify key id (-I) when certifying"); 2520 do_ca_sign(pw, argc, argv); 2521 } 2522 if (show_cert) 2523 do_show_cert(pw); 2524 if (delete_host || hash_hosts || find_host) 2525 do_known_hosts(pw, rr_hostname); 2526 if (pkcs11provider != NULL) 2527 do_download(pw); 2528 if (print_fingerprint || print_bubblebabble) 2529 do_fingerprint(pw); 2530 if (change_passphrase) 2531 do_change_passphrase(pw); 2532 if (change_comment) 2533 do_change_comment(pw); 2534#ifdef WITH_OPENSSL 2535 if (convert_to) 2536 do_convert_to(pw); 2537 if (convert_from) 2538 do_convert_from(pw); 2539#endif 2540 if (print_public) 2541 do_print_public(pw); 2542 if (rr_hostname != NULL) { 2543 unsigned int n = 0; 2544 2545 if (have_identity) { 2546 n = do_print_resource_record(pw, 2547 identity_file, rr_hostname); 2548 if (n == 0) { 2549 perror(identity_file); 2550 exit(1); 2551 } 2552 exit(0); 2553 } else { 2554 2555 n += do_print_resource_record(pw, 2556 _PATH_HOST_RSA_KEY_FILE, rr_hostname); 2557 n += do_print_resource_record(pw, 2558 _PATH_HOST_DSA_KEY_FILE, rr_hostname); 2559 n += do_print_resource_record(pw, 2560 _PATH_HOST_ECDSA_KEY_FILE, rr_hostname); 2561 n += do_print_resource_record(pw, 2562 _PATH_HOST_ED25519_KEY_FILE, rr_hostname); 2563 if (n == 0) 2564 fatal("no keys found."); 2565 exit(0); 2566 } 2567 } 2568 2569 if (do_gen_candidates) { 2570 FILE *out = fopen(out_file, "w"); 2571 2572 if (out == NULL) { 2573 error("Couldn't open modulus candidate file \"%s\": %s", 2574 out_file, strerror(errno)); 2575 return (1); 2576 } 2577 if (bits == 0) 2578 bits = DEFAULT_BITS; 2579 if (gen_candidates(out, memory, bits, start) != 0) 2580 fatal("modulus candidate generation failed"); 2581 2582 return (0); 2583 } 2584 2585 if (do_screen_candidates) { 2586 FILE *in; 2587 FILE *out = fopen(out_file, "a"); 2588 2589 if (have_identity && strcmp(identity_file, "-") != 0) { 2590 if ((in = fopen(identity_file, "r")) == NULL) { 2591 fatal("Couldn't open modulus candidate " 2592 "file \"%s\": %s", identity_file, 2593 strerror(errno)); 2594 } 2595 } else 2596 in = stdin; 2597 2598 if (out == NULL) { 2599 fatal("Couldn't open moduli file \"%s\": %s", 2600 out_file, strerror(errno)); 2601 } 2602 if (prime_test(in, out, rounds == 0 ? 100 : rounds, 2603 generator_wanted, checkpoint, 2604 start_lineno, lines_to_process) != 0) 2605 fatal("modulus screening failed"); 2606 return (0); 2607 } 2608 2609 if (gen_all_hostkeys) { 2610 do_gen_all_hostkeys(pw); 2611 return (0); 2612 } 2613 2614 if (key_type_name == NULL) 2615 key_type_name = "rsa"; 2616 2617 type = sshkey_type_from_name(key_type_name); 2618 type_bits_valid(type, key_type_name, &bits); 2619 2620 if (!quiet) 2621 printf("Generating public/private %s key pair.\n", 2622 key_type_name); 2623 if ((r = sshkey_generate(type, bits, &private)) != 0) { 2624 fprintf(stderr, "key_generate failed\n"); 2625 exit(1); 2626 } 2627 if ((r = sshkey_from_private(private, &public)) != 0) { 2628 fprintf(stderr, "key_from_private failed: %s\n", ssh_err(r)); 2629 exit(1); 2630 } 2631 2632 if (!have_identity) 2633 ask_filename(pw, "Enter file in which to save the key"); 2634 2635 /* Create ~/.ssh directory if it doesn't already exist. */ 2636 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", 2637 pw->pw_dir, _PATH_SSH_USER_DIR); 2638 if (strstr(identity_file, dotsshdir) != NULL) { 2639 if (stat(dotsshdir, &st) < 0) { 2640 if (errno != ENOENT) { 2641 error("Could not stat %s: %s", dotsshdir, 2642 strerror(errno)); 2643 } else if (mkdir(dotsshdir, 0700) < 0) { 2644 error("Could not create directory '%s': %s", 2645 dotsshdir, strerror(errno)); 2646 } else if (!quiet) 2647 printf("Created directory '%s'.\n", dotsshdir); 2648 } 2649 } 2650 /* If the file already exists, ask the user to confirm. */ 2651 if (stat(identity_file, &st) >= 0) { 2652 char yesno[3]; 2653 printf("%s already exists.\n", identity_file); 2654 printf("Overwrite (y/n)? "); 2655 fflush(stdout); 2656 if (fgets(yesno, sizeof(yesno), stdin) == NULL) 2657 exit(1); 2658 if (yesno[0] != 'y' && yesno[0] != 'Y') 2659 exit(1); 2660 } 2661 /* Ask for a passphrase (twice). */ 2662 if (identity_passphrase) 2663 passphrase1 = xstrdup(identity_passphrase); 2664 else if (identity_new_passphrase) 2665 passphrase1 = xstrdup(identity_new_passphrase); 2666 else { 2667passphrase_again: 2668 passphrase1 = 2669 read_passphrase("Enter passphrase (empty for no " 2670 "passphrase): ", RP_ALLOW_STDIN); 2671 passphrase2 = read_passphrase("Enter same passphrase again: ", 2672 RP_ALLOW_STDIN); 2673 if (strcmp(passphrase1, passphrase2) != 0) { 2674 /* 2675 * The passphrases do not match. Clear them and 2676 * retry. 2677 */ 2678 explicit_bzero(passphrase1, strlen(passphrase1)); 2679 explicit_bzero(passphrase2, strlen(passphrase2)); 2680 free(passphrase1); 2681 free(passphrase2); 2682 printf("Passphrases do not match. Try again.\n"); 2683 goto passphrase_again; 2684 } 2685 /* Clear the other copy of the passphrase. */ 2686 explicit_bzero(passphrase2, strlen(passphrase2)); 2687 free(passphrase2); 2688 } 2689 2690 if (identity_comment) { 2691 strlcpy(comment, identity_comment, sizeof(comment)); 2692 } else { 2693 /* Create default comment field for the passphrase. */ 2694 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); 2695 } 2696 2697 /* Save the key with the given passphrase and comment. */ 2698 if ((r = sshkey_save_private(private, identity_file, passphrase1, 2699 comment, use_new_format, new_format_cipher, rounds)) != 0) { 2700 printf("Saving key \"%s\" failed: %s\n", 2701 identity_file, ssh_err(r)); 2702 explicit_bzero(passphrase1, strlen(passphrase1)); 2703 free(passphrase1); 2704 exit(1); 2705 } 2706 /* Clear the passphrase. */ 2707 explicit_bzero(passphrase1, strlen(passphrase1)); 2708 free(passphrase1); 2709 2710 /* Clear the private key and the random number generator. */ 2711 sshkey_free(private); 2712 2713 if (!quiet) 2714 printf("Your identification has been saved in %s.\n", identity_file); 2715 2716 strlcat(identity_file, ".pub", sizeof(identity_file)); 2717 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); 2718 if (fd == -1) { 2719 printf("Could not save your public key in %s\n", identity_file); 2720 exit(1); 2721 } 2722 f = fdopen(fd, "w"); 2723 if (f == NULL) { 2724 printf("fdopen %s failed\n", identity_file); 2725 exit(1); 2726 } 2727 if ((r = sshkey_write(public, f)) != 0) 2728 fprintf(stderr, "write key failed: %s\n", ssh_err(r)); 2729 fprintf(f, " %s\n", comment); 2730 fclose(f); 2731 2732 if (!quiet) { 2733 fp = sshkey_fingerprint(public, fingerprint_hash, 2734 SSH_FP_DEFAULT); 2735 ra = sshkey_fingerprint(public, fingerprint_hash, 2736 SSH_FP_RANDOMART); 2737 if (fp == NULL || ra == NULL) 2738 fatal("sshkey_fingerprint failed"); 2739 printf("Your public key has been saved in %s.\n", 2740 identity_file); 2741 printf("The key fingerprint is:\n"); 2742 printf("%s %s\n", fp, comment); 2743 printf("The key's randomart image is:\n"); 2744 printf("%s\n", ra); 2745 free(ra); 2746 free(fp); 2747 } 2748 2749 sshkey_free(public); 2750 exit(0); 2751} 2752