2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 * Identity and host key generation and maintenance.
7 * As far as I am concerned, the code I have written for this software
8 * can be used freely for any purpose. Any derived versions of this
9 * software must be clearly marked as such, and if the derived work is
10 * incompatible with the protocol description in the RFC file, it must be
11 * called by a name other than "ssh" or "Secure Shell".
15 RCSID("$OpenBSD: ssh-keygen.c,v 1.135 2005/11/29 02:04:55 dtucker Exp $");
17 #include <openssl/evp.h>
18 #include <openssl/pem.h>
27 #include "pathnames.h"
38 /* Number of bits in the RSA/DSA key. This value can be set on the command line. */
39 #define DEFAULT_BITS 2048
40 #define DEFAULT_BITS_DSA 1024
44 * Flag indicating that we just want to change the passphrase. This can be
45 * set on the command line.
47 int change_passphrase = 0;
50 * Flag indicating that we just want to change the comment. This can be set
51 * on the command line.
53 int change_comment = 0;
57 /* Flag indicating that we want to hash a known_hosts file */
59 /* Flag indicating that we want lookup a host in known_hosts file */
61 /* Flag indicating that we want to delete a host from a known_hosts file */
64 /* Flag indicating that we just want to see the key fingerprint */
65 int print_fingerprint = 0;
66 int print_bubblebabble = 0;
68 /* The identity file name, given on the command line or entered by the user. */
69 char identity_file[1024];
70 int have_identity = 0;
72 /* This is set to the passphrase if given on the command line. */
73 char *identity_passphrase = NULL;
75 /* This is set to the new passphrase if given on the command line. */
76 char *identity_new_passphrase = NULL;
78 /* This is set to the new comment if given on the command line. */
79 char *identity_comment = NULL;
81 /* Dump public key file in format used by real and the original SSH 2 */
82 int convert_to_ssh2 = 0;
83 int convert_from_ssh2 = 0;
85 int print_generic = 0;
87 char *key_type_name = NULL;
90 extern char *__progname;
92 char hostname[MAXHOSTNAMELEN];
95 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
96 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t);
99 ask_filename(struct passwd *pw, const char *prompt)
104 if (key_type_name == NULL)
105 name = _PATH_SSH_CLIENT_ID_RSA;
107 switch (key_type_from_name(key_type_name)) {
109 name = _PATH_SSH_CLIENT_IDENTITY;
112 name = _PATH_SSH_CLIENT_ID_DSA;
115 name = _PATH_SSH_CLIENT_ID_RSA;
118 fprintf(stderr, "bad key type");
123 snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
124 fprintf(stderr, "%s (%s): ", prompt, identity_file);
125 if (fgets(buf, sizeof(buf), stdin) == NULL)
127 if (strchr(buf, '\n'))
128 *strchr(buf, '\n') = 0;
129 if (strcmp(buf, "") != 0)
130 strlcpy(identity_file, buf, sizeof(identity_file));
135 load_identity(char *filename)
140 prv = key_load_private(filename, "", NULL);
142 if (identity_passphrase)
143 pass = xstrdup(identity_passphrase);
145 pass = read_passphrase("Enter passphrase: ",
147 prv = key_load_private(filename, pass, NULL);
148 memset(pass, 0, strlen(pass));
154 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
155 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
156 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
157 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
160 do_convert_to_ssh2(struct passwd *pw)
168 ask_filename(pw, "Enter file in which the key is");
169 if (stat(identity_file, &st) < 0) {
170 perror(identity_file);
173 if ((k = key_load_public(identity_file, NULL)) == NULL) {
174 if ((k = load_identity(identity_file)) == NULL) {
175 fprintf(stderr, "load failed\n");
179 if (k->type == KEY_RSA1) {
180 fprintf(stderr, "version 1 keys are not supported\n");
183 if (key_to_blob(k, &blob, &len) <= 0) {
184 fprintf(stderr, "key_to_blob failed\n");
187 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
189 "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n",
190 key_size(k), key_type(k),
191 pw->pw_name, hostname);
192 dump_base64(stdout, blob, len);
193 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
200 buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
202 u_int bignum_bits = buffer_get_int(b);
203 u_int bytes = (bignum_bits + 7) / 8;
205 if (buffer_len(b) < bytes)
206 fatal("buffer_get_bignum_bits: input buffer too small: "
207 "need %d have %d", bytes, buffer_len(b));
208 BN_bin2bn(buffer_ptr(b), bytes, value);
209 buffer_consume(b, bytes);
213 do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
218 u_char *sig, data[] = "abcde12345";
219 int magic, rlen, ktype, i1, i2, i3, i4;
224 buffer_append(&b, blob, blen);
226 magic = buffer_get_int(&b);
227 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
228 error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
232 i1 = buffer_get_int(&b);
233 type = buffer_get_string(&b, NULL);
234 cipher = buffer_get_string(&b, NULL);
235 i2 = buffer_get_int(&b);
236 i3 = buffer_get_int(&b);
237 i4 = buffer_get_int(&b);
238 debug("ignore (%d %d %d %d)", i1,i2,i3,i4);
239 if (strcmp(cipher, "none") != 0) {
240 error("unsupported cipher %s", cipher);
248 if (strstr(type, "dsa")) {
250 } else if (strstr(type, "rsa")) {
257 key = key_new_private(ktype);
262 buffer_get_bignum_bits(&b, key->dsa->p);
263 buffer_get_bignum_bits(&b, key->dsa->g);
264 buffer_get_bignum_bits(&b, key->dsa->q);
265 buffer_get_bignum_bits(&b, key->dsa->pub_key);
266 buffer_get_bignum_bits(&b, key->dsa->priv_key);
269 e = buffer_get_char(&b);
273 e += buffer_get_char(&b);
276 e += buffer_get_char(&b);
279 if (!BN_set_word(key->rsa->e, e)) {
284 buffer_get_bignum_bits(&b, key->rsa->d);
285 buffer_get_bignum_bits(&b, key->rsa->n);
286 buffer_get_bignum_bits(&b, key->rsa->iqmp);
287 buffer_get_bignum_bits(&b, key->rsa->q);
288 buffer_get_bignum_bits(&b, key->rsa->p);
289 rsa_generate_additional_parameters(key->rsa);
292 rlen = buffer_len(&b);
294 error("do_convert_private_ssh2_from_blob: "
295 "remaining bytes in key blob %d", rlen);
299 key_sign(key, &sig, &slen, data, sizeof(data));
300 key_verify(key, sig, slen, data, sizeof(data));
306 do_convert_from_ssh2(struct passwd *pw)
315 int escaped = 0, private = 0, ok;
319 ask_filename(pw, "Enter file in which the key is");
320 if (stat(identity_file, &st) < 0) {
321 perror(identity_file);
324 fp = fopen(identity_file, "r");
326 perror(identity_file);
330 while (fgets(line, sizeof(line), fp)) {
331 if (!(p = strchr(line, '\n'))) {
332 fprintf(stderr, "input line too long.\n");
335 if (p > line && p[-1] == '\\')
337 if (strncmp(line, "----", 4) == 0 ||
338 strstr(line, ": ") != NULL) {
339 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
341 if (strstr(line, " END ") != NULL) {
344 /* fprintf(stderr, "ignore: %s", line); */
349 /* fprintf(stderr, "escaped: %s", line); */
353 strlcat(encoded, line, sizeof(encoded));
355 len = strlen(encoded);
356 if (((len % 4) == 3) &&
357 (encoded[len-1] == '=') &&
358 (encoded[len-2] == '=') &&
359 (encoded[len-3] == '='))
360 encoded[len-3] = '\0';
361 blen = uudecode(encoded, blob, sizeof(blob));
363 fprintf(stderr, "uudecode failed.\n");
367 do_convert_private_ssh2_from_blob(blob, blen) :
368 key_from_blob(blob, blen);
370 fprintf(stderr, "decode blob failed.\n");
374 (k->type == KEY_DSA ?
375 PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
376 PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
377 key_write(k, stdout);
379 fprintf(stderr, "key write failed");
384 fprintf(stdout, "\n");
390 do_print_public(struct passwd *pw)
396 ask_filename(pw, "Enter file in which the key is");
397 if (stat(identity_file, &st) < 0) {
398 perror(identity_file);
401 prv = load_identity(identity_file);
403 fprintf(stderr, "load failed\n");
406 if (!key_write(prv, stdout))
407 fprintf(stderr, "key_write failed");
409 fprintf(stdout, "\n");
415 do_upload(struct passwd *pw, const char *sc_reader_id)
422 ask_filename(pw, "Enter file in which the key is");
423 if (stat(identity_file, &st) < 0) {
424 perror(identity_file);
427 prv = load_identity(identity_file);
429 error("load failed");
432 ret = sc_put_key(prv, sc_reader_id);
436 logit("loading key done");
441 do_download(struct passwd *pw, const char *sc_reader_id)
446 keys = sc_get_keys(sc_reader_id, NULL);
448 fatal("cannot read public key from smartcard");
449 for (i = 0; keys[i]; i++) {
450 key_write(keys[i], stdout);
452 fprintf(stdout, "\n");
457 #endif /* SMARTCARD */
460 do_fingerprint(struct passwd *pw)
464 char *comment = NULL, *cp, *ep, line[16*1024], *fp;
465 int i, skip = 0, num = 1, invalid = 1;
470 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
471 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
474 ask_filename(pw, "Enter file in which the key is");
475 if (stat(identity_file, &st) < 0) {
476 perror(identity_file);
479 public = key_load_public(identity_file, &comment);
480 if (public != NULL) {
481 fp = key_fingerprint(public, fptype, rep);
482 printf("%u %s %s\n", key_size(public), fp, comment);
491 f = fopen(identity_file, "r");
493 while (fgets(line, sizeof(line), f)) {
494 i = strlen(line) - 1;
495 if (line[i] != '\n') {
496 error("line %d too long: %.40s...", num, line);
507 /* Skip leading whitespace, empty and comment lines. */
508 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
510 if (!*cp || *cp == '\n' || *cp == '#')
512 i = strtol(cp, &ep, 10);
513 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
516 for (; *cp && (quoted || (*cp != ' ' &&
517 *cp != '\t')); cp++) {
518 if (*cp == '\\' && cp[1] == '"')
519 cp++; /* Skip both */
528 public = key_new(KEY_RSA1);
529 if (key_read(public, &cp) != 1) {
532 public = key_new(KEY_UNSPEC);
533 if (key_read(public, &cp) != 1) {
538 comment = *cp ? cp : comment;
539 fp = key_fingerprint(public, fptype, rep);
540 printf("%u %s %s\n", key_size(public), fp,
541 comment ? comment : "no comment");
549 printf("%s is not a public key file.\n", identity_file);
556 print_host(FILE *f, char *name, Key *public, int hash)
558 if (hash && (name = host_hash(name, NULL, 0)) == NULL)
559 fatal("hash_host failed");
560 fprintf(f, "%s ", name);
561 if (!key_write(public, f))
562 fatal("key_write failed");
567 do_known_hosts(struct passwd *pw, const char *name)
569 FILE *in, *out = stdout;
571 char *cp, *cp2, *kp, *kp2;
572 char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN];
573 int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0;
575 if (!have_identity) {
576 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
577 if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
578 sizeof(identity_file))
579 fatal("Specified known hosts path too long");
583 if ((in = fopen(identity_file, "r")) == NULL)
584 fatal("fopen: %s", strerror(errno));
587 * Find hosts goes to stdout, hash and deletions happen in-place
588 * A corner case is ssh-keygen -HF foo, which should go to stdout
590 if (!find_host && (hash_hosts || delete_host)) {
591 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
592 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
593 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
594 strlcat(old, ".old", sizeof(old)) >= sizeof(old))
595 fatal("known_hosts path too long");
597 if ((c = mkstemp(tmp)) == -1)
598 fatal("mkstemp: %s", strerror(errno));
599 if ((out = fdopen(c, "w")) == NULL) {
602 fatal("fdopen: %s", strerror(c));
607 while (fgets(line, sizeof(line), in)) {
609 i = strlen(line) - 1;
610 if (line[i] != '\n') {
611 error("line %d too long: %.40s...", num, line);
622 /* Skip leading whitespace, empty and comment lines. */
623 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
625 if (!*cp || *cp == '\n' || *cp == '#') {
627 fprintf(out, "%s\n", cp);
630 /* Find the end of the host name portion. */
631 for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++)
633 if (*kp == '\0' || *(kp + 1) == '\0') {
634 error("line %d missing key: %.40s...",
642 public = key_new(KEY_RSA1);
643 if (key_read(public, &kp) != 1) {
646 public = key_new(KEY_UNSPEC);
647 if (key_read(public, &kp) != 1) {
648 error("line %d invalid key: %.40s...",
656 if (*cp == HASH_DELIM) {
657 if (find_host || delete_host) {
658 cp2 = host_hash(name, cp, strlen(cp));
660 error("line %d: invalid hashed "
661 "name: %.64s...", num, line);
665 c = (strcmp(cp2, cp) == 0);
666 if (find_host && c) {
667 printf("# Host %s found: "
668 "line %d type %s\n", name,
669 num, key_type(public));
670 print_host(out, cp, public, 0);
672 if (delete_host && !c)
673 print_host(out, cp, public, 0);
674 } else if (hash_hosts)
675 print_host(out, cp, public, 0);
677 if (find_host || delete_host) {
678 c = (match_hostname(name, cp,
680 if (find_host && c) {
681 printf("# Host %s found: "
682 "line %d type %s\n", name,
683 num, key_type(public));
684 print_host(out, cp, public, hash_hosts);
686 if (delete_host && !c)
687 print_host(out, cp, public, 0);
688 } else if (hash_hosts) {
689 for (cp2 = strsep(&cp, ",");
690 cp2 != NULL && *cp2 != '\0';
691 cp2 = strsep(&cp, ",")) {
692 if (strcspn(cp2, "*?!") != strlen(cp2))
693 fprintf(stderr, "Warning: "
694 "ignoring host name with "
695 "metacharacters: %.64s\n",
698 print_host(out, cp2, public, 1);
708 fprintf(stderr, "%s is not a valid known_host file.\n",
711 fprintf(stderr, "Not replacing existing known_hosts "
712 "file because of errors\n");
722 /* Backup existing file */
723 if (unlink(old) == -1 && errno != ENOENT)
724 fatal("unlink %.100s: %s", old, strerror(errno));
725 if (link(identity_file, old) == -1)
726 fatal("link %.100s to %.100s: %s", identity_file, old,
728 /* Move new one into place */
729 if (rename(tmp, identity_file) == -1) {
730 error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
737 fprintf(stderr, "%s updated.\n", identity_file);
738 fprintf(stderr, "Original contents retained as %s\n", old);
740 fprintf(stderr, "WARNING: %s contains unhashed "
742 fprintf(stderr, "Delete this file to ensure privacy "
751 * Perform changing a passphrase. The argument is the passwd structure
752 * for the current user.
755 do_change_passphrase(struct passwd *pw)
758 char *old_passphrase, *passphrase1, *passphrase2;
763 ask_filename(pw, "Enter file in which the key is");
764 if (stat(identity_file, &st) < 0) {
765 perror(identity_file);
768 /* Try to load the file with empty passphrase. */
769 private = key_load_private(identity_file, "", &comment);
770 if (private == NULL) {
771 if (identity_passphrase)
772 old_passphrase = xstrdup(identity_passphrase);
775 read_passphrase("Enter old passphrase: ",
777 private = key_load_private(identity_file, old_passphrase,
779 memset(old_passphrase, 0, strlen(old_passphrase));
780 xfree(old_passphrase);
781 if (private == NULL) {
782 printf("Bad passphrase.\n");
786 printf("Key has comment '%s'\n", comment);
788 /* Ask the new passphrase (twice). */
789 if (identity_new_passphrase) {
790 passphrase1 = xstrdup(identity_new_passphrase);
794 read_passphrase("Enter new passphrase (empty for no "
795 "passphrase): ", RP_ALLOW_STDIN);
796 passphrase2 = read_passphrase("Enter same passphrase again: ",
799 /* Verify that they are the same. */
800 if (strcmp(passphrase1, passphrase2) != 0) {
801 memset(passphrase1, 0, strlen(passphrase1));
802 memset(passphrase2, 0, strlen(passphrase2));
805 printf("Pass phrases do not match. Try again.\n");
808 /* Destroy the other copy. */
809 memset(passphrase2, 0, strlen(passphrase2));
813 /* Save the file using the new passphrase. */
814 if (!key_save_private(private, identity_file, passphrase1, comment)) {
815 printf("Saving the key failed: %s.\n", identity_file);
816 memset(passphrase1, 0, strlen(passphrase1));
822 /* Destroy the passphrase and the copy of the key in memory. */
823 memset(passphrase1, 0, strlen(passphrase1));
825 key_free(private); /* Destroys contents */
828 printf("Your identification has been saved with the new passphrase.\n");
833 * Print the SSHFP RR.
836 do_print_resource_record(struct passwd *pw, char *hname)
839 char *comment = NULL;
843 ask_filename(pw, "Enter file in which the key is");
844 if (stat(identity_file, &st) < 0) {
845 perror(identity_file);
848 public = key_load_public(identity_file, &comment);
849 if (public != NULL) {
850 export_dns_rr(hname, public, stdout, print_generic);
858 printf("failed to read v2 public key from %s.\n", identity_file);
863 * Change the comment of a private key file.
866 do_change_comment(struct passwd *pw)
868 char new_comment[1024], *comment, *passphrase;
876 ask_filename(pw, "Enter file in which the key is");
877 if (stat(identity_file, &st) < 0) {
878 perror(identity_file);
881 private = key_load_private(identity_file, "", &comment);
882 if (private == NULL) {
883 if (identity_passphrase)
884 passphrase = xstrdup(identity_passphrase);
885 else if (identity_new_passphrase)
886 passphrase = xstrdup(identity_new_passphrase);
888 passphrase = read_passphrase("Enter passphrase: ",
890 /* Try to load using the passphrase. */
891 private = key_load_private(identity_file, passphrase, &comment);
892 if (private == NULL) {
893 memset(passphrase, 0, strlen(passphrase));
895 printf("Bad passphrase.\n");
899 passphrase = xstrdup("");
901 if (private->type != KEY_RSA1) {
902 fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
906 printf("Key now has comment '%s'\n", comment);
908 if (identity_comment) {
909 strlcpy(new_comment, identity_comment, sizeof(new_comment));
911 printf("Enter new comment: ");
913 if (!fgets(new_comment, sizeof(new_comment), stdin)) {
914 memset(passphrase, 0, strlen(passphrase));
918 if (strchr(new_comment, '\n'))
919 *strchr(new_comment, '\n') = 0;
922 /* Save the file using the new passphrase. */
923 if (!key_save_private(private, identity_file, passphrase, new_comment)) {
924 printf("Saving the key failed: %s.\n", identity_file);
925 memset(passphrase, 0, strlen(passphrase));
931 memset(passphrase, 0, strlen(passphrase));
933 public = key_from_private(private);
936 strlcat(identity_file, ".pub", sizeof(identity_file));
937 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
939 printf("Could not save your public key in %s\n", identity_file);
944 printf("fdopen %s failed", identity_file);
947 if (!key_write(public, f))
948 fprintf(stderr, "write key failed");
950 fprintf(f, " %s\n", new_comment);
955 printf("The comment in your key file has been changed.\n");
962 fprintf(stderr, "Usage: %s [options]\n", __progname);
963 fprintf(stderr, "Options:\n");
964 fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n");
965 fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
966 fprintf(stderr, " -b bits Number of bits in the key to create.\n");
967 fprintf(stderr, " -C comment Provide new comment.\n");
968 fprintf(stderr, " -c Change comment in private and public key files.\n");
970 fprintf(stderr, " -D reader Download public key from smartcard.\n");
971 #endif /* SMARTCARD */
972 fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n");
973 fprintf(stderr, " -F hostname Find hostname in known hosts file.\n");
974 fprintf(stderr, " -f filename Filename of the key file.\n");
975 fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n");
976 fprintf(stderr, " -g Use generic DNS resource record format.\n");
977 fprintf(stderr, " -H Hash names in known_hosts file.\n");
978 fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n");
979 fprintf(stderr, " -l Show fingerprint of key file.\n");
980 fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n");
981 fprintf(stderr, " -N phrase Provide new passphrase.\n");
982 fprintf(stderr, " -P phrase Provide old passphrase.\n");
983 fprintf(stderr, " -p Change passphrase of private key file.\n");
984 fprintf(stderr, " -q Quiet.\n");
985 fprintf(stderr, " -R hostname Remove host from known_hosts file.\n");
986 fprintf(stderr, " -r hostname Print DNS resource record.\n");
987 fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n");
988 fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n");
989 fprintf(stderr, " -t type Specify type of key to create.\n");
991 fprintf(stderr, " -U reader Upload private key to smartcard.\n");
992 #endif /* SMARTCARD */
993 fprintf(stderr, " -v Verbose.\n");
994 fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n");
995 fprintf(stderr, " -y Read private key file and print public key.\n");
1001 * Main program for key management.
1004 main(int ac, char **av)
1006 char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1007 char out_file[MAXPATHLEN], *reader_id = NULL;
1008 char *rr_hostname = NULL;
1009 Key *private, *public;
1012 int opt, type, fd, download = 0;
1013 u_int32_t memory = 0, generator_wanted = 0, trials = 100;
1014 int do_gen_candidates = 0, do_screen_candidates = 0;
1015 int log_level = SYSLOG_LEVEL_INFO;
1016 BIGNUM *start = NULL;
1021 extern char *optarg;
1023 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
1026 __progname = ssh_get_progname(av[0]);
1029 SSLeay_add_all_algorithms();
1030 log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1035 /* we need this for the home * directory. */
1036 pw = getpwuid(getuid());
1038 printf("You don't exist, go away!\n");
1041 if (gethostname(hostname, sizeof(hostname)) < 0) {
1042 perror("gethostname");
1046 while ((opt = getopt(ac, av,
1047 "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) {
1050 bits = strtonum(optarg, 768, 32768, &errstr);
1052 fatal("Bits has bad value %s (%s)",
1057 rr_hostname = optarg;
1064 rr_hostname = optarg;
1067 print_fingerprint = 1;
1070 print_bubblebabble = 1;
1073 change_passphrase = 1;
1079 if (strlcpy(identity_file, optarg, sizeof(identity_file)) >=
1080 sizeof(identity_file))
1081 fatal("Identity filename too long");
1088 identity_passphrase = optarg;
1091 identity_new_passphrase = optarg;
1094 identity_comment = optarg;
1102 convert_to_ssh2 = 1;
1107 convert_from_ssh2 = 1;
1113 key_type_name = "dsa";
1116 key_type_name = optarg;
1124 if (log_level == SYSLOG_LEVEL_INFO)
1125 log_level = SYSLOG_LEVEL_DEBUG1;
1127 if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1128 log_level < SYSLOG_LEVEL_DEBUG3)
1133 rr_hostname = optarg;
1136 generator_wanted = strtonum(optarg, 1, UINT_MAX, &errstr);
1138 fatal("Desired generator has bad value: %s (%s)",
1142 trials = strtonum(optarg, 1, UINT_MAX, &errstr);
1144 fatal("Invalid number of trials: %s (%s)",
1148 memory = strtonum(optarg, 1, UINT_MAX, &errstr);
1150 fatal("Memory limit is %s: %s", errstr, optarg);
1154 do_gen_candidates = 1;
1155 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1157 fatal("Output filename too long");
1160 do_screen_candidates = 1;
1161 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1163 fatal("Output filename too long");
1166 /* XXX - also compare length against bits */
1167 if (BN_hex2bn(&start, optarg) == 0)
1168 fatal("Invalid start point.");
1177 log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1);
1180 printf("Too many arguments.\n");
1183 if (change_passphrase && change_comment) {
1184 printf("Can only have one of -p and -c.\n");
1187 if (delete_host || hash_hosts || find_host)
1188 do_known_hosts(pw, rr_hostname);
1189 if (print_fingerprint || print_bubblebabble)
1191 if (change_passphrase)
1192 do_change_passphrase(pw);
1194 do_change_comment(pw);
1195 if (convert_to_ssh2)
1196 do_convert_to_ssh2(pw);
1197 if (convert_from_ssh2)
1198 do_convert_from_ssh2(pw);
1200 do_print_public(pw);
1201 if (rr_hostname != NULL) {
1202 do_print_resource_record(pw, rr_hostname);
1204 if (reader_id != NULL) {
1207 do_download(pw, reader_id);
1209 do_upload(pw, reader_id);
1210 #else /* SMARTCARD */
1211 fatal("no support for smartcards.");
1212 #endif /* SMARTCARD */
1215 if (do_gen_candidates) {
1216 FILE *out = fopen(out_file, "w");
1219 error("Couldn't open modulus candidate file \"%s\": %s",
1220 out_file, strerror(errno));
1224 bits = DEFAULT_BITS;
1225 if (gen_candidates(out, memory, bits, start) != 0)
1226 fatal("modulus candidate generation failed");
1231 if (do_screen_candidates) {
1233 FILE *out = fopen(out_file, "w");
1235 if (have_identity && strcmp(identity_file, "-") != 0) {
1236 if ((in = fopen(identity_file, "r")) == NULL) {
1237 fatal("Couldn't open modulus candidate "
1238 "file \"%s\": %s", identity_file,
1245 fatal("Couldn't open moduli file \"%s\": %s",
1246 out_file, strerror(errno));
1248 if (prime_test(in, out, trials, generator_wanted) != 0)
1249 fatal("modulus screening failed");
1255 if (key_type_name == NULL)
1256 key_type_name = "rsa";
1258 type = key_type_from_name(key_type_name);
1259 if (type == KEY_UNSPEC) {
1260 fprintf(stderr, "unknown key type %s\n", key_type_name);
1264 bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS;
1265 if (type == KEY_DSA && bits != 1024)
1266 fatal("DSA keys must be 1024 bits");
1268 printf("Generating public/private %s key pair.\n", key_type_name);
1269 private = key_generate(type, bits);
1270 if (private == NULL) {
1271 fprintf(stderr, "key_generate failed");
1274 public = key_from_private(private);
1277 ask_filename(pw, "Enter file in which to save the key");
1279 /* Create ~/.ssh directory if it doesn't already exist. */
1280 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
1281 if (strstr(identity_file, dotsshdir) != NULL &&
1282 stat(dotsshdir, &st) < 0) {
1283 if (mkdir(dotsshdir, 0700) < 0)
1284 error("Could not create directory '%s'.", dotsshdir);
1286 printf("Created directory '%s'.\n", dotsshdir);
1288 /* If the file already exists, ask the user to confirm. */
1289 if (stat(identity_file, &st) >= 0) {
1291 printf("%s already exists.\n", identity_file);
1292 printf("Overwrite (y/n)? ");
1294 if (fgets(yesno, sizeof(yesno), stdin) == NULL)
1296 if (yesno[0] != 'y' && yesno[0] != 'Y')
1299 /* Ask for a passphrase (twice). */
1300 if (identity_passphrase)
1301 passphrase1 = xstrdup(identity_passphrase);
1302 else if (identity_new_passphrase)
1303 passphrase1 = xstrdup(identity_new_passphrase);
1307 read_passphrase("Enter passphrase (empty for no "
1308 "passphrase): ", RP_ALLOW_STDIN);
1309 passphrase2 = read_passphrase("Enter same passphrase again: ",
1311 if (strcmp(passphrase1, passphrase2) != 0) {
1313 * The passphrases do not match. Clear them and
1316 memset(passphrase1, 0, strlen(passphrase1));
1317 memset(passphrase2, 0, strlen(passphrase2));
1320 printf("Passphrases do not match. Try again.\n");
1321 goto passphrase_again;
1323 /* Clear the other copy of the passphrase. */
1324 memset(passphrase2, 0, strlen(passphrase2));
1328 if (identity_comment) {
1329 strlcpy(comment, identity_comment, sizeof(comment));
1331 /* Create default commend field for the passphrase. */
1332 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
1335 /* Save the key with the given passphrase and comment. */
1336 if (!key_save_private(private, identity_file, passphrase1, comment)) {
1337 printf("Saving the key failed: %s.\n", identity_file);
1338 memset(passphrase1, 0, strlen(passphrase1));
1342 /* Clear the passphrase. */
1343 memset(passphrase1, 0, strlen(passphrase1));
1346 /* Clear the private key and the random number generator. */
1351 printf("Your identification has been saved in %s.\n", identity_file);
1353 strlcat(identity_file, ".pub", sizeof(identity_file));
1354 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1356 printf("Could not save your public key in %s\n", identity_file);
1359 f = fdopen(fd, "w");
1361 printf("fdopen %s failed", identity_file);
1364 if (!key_write(public, f))
1365 fprintf(stderr, "write key failed");
1366 fprintf(f, " %s\n", comment);
1370 char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1371 printf("Your public key has been saved in %s.\n",
1373 printf("The key fingerprint is:\n");
1374 printf("%s %s\n", fp, comment);