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 1.123 2005/04/05 13:45:31 otto 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 changed on the command line. */
42 * Flag indicating that we just want to change the passphrase. This can be
43 * set on the command line.
45 int change_passphrase = 0;
48 * Flag indicating that we just want to change the comment. This can be set
49 * on the command line.
51 int change_comment = 0;
55 /* Flag indicating that we want to hash a known_hosts file */
57 /* Flag indicating that we want lookup a host in known_hosts file */
59 /* Flag indicating that we want to delete a host from a known_hosts file */
62 /* Flag indicating that we just want to see the key fingerprint */
63 int print_fingerprint = 0;
64 int print_bubblebabble = 0;
66 /* The identity file name, given on the command line or entered by the user. */
67 char identity_file[1024];
68 int have_identity = 0;
70 /* This is set to the passphrase if given on the command line. */
71 char *identity_passphrase = NULL;
73 /* This is set to the new passphrase if given on the command line. */
74 char *identity_new_passphrase = NULL;
76 /* This is set to the new comment if given on the command line. */
77 char *identity_comment = NULL;
79 /* Dump public key file in format used by real and the original SSH 2 */
80 int convert_to_ssh2 = 0;
81 int convert_from_ssh2 = 0;
83 int print_generic = 0;
85 char *key_type_name = NULL;
88 extern char *__progname;
90 char hostname[MAXHOSTNAMELEN];
93 int gen_candidates(FILE *, int, int, BIGNUM *);
94 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t);
97 ask_filename(struct passwd *pw, const char *prompt)
102 if (key_type_name == NULL)
103 name = _PATH_SSH_CLIENT_ID_RSA;
105 switch (key_type_from_name(key_type_name)) {
107 name = _PATH_SSH_CLIENT_IDENTITY;
110 name = _PATH_SSH_CLIENT_ID_DSA;
113 name = _PATH_SSH_CLIENT_ID_RSA;
116 fprintf(stderr, "bad key type");
121 snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
122 fprintf(stderr, "%s (%s): ", prompt, identity_file);
123 if (fgets(buf, sizeof(buf), stdin) == NULL)
125 if (strchr(buf, '\n'))
126 *strchr(buf, '\n') = 0;
127 if (strcmp(buf, "") != 0)
128 strlcpy(identity_file, buf, sizeof(identity_file));
133 load_identity(char *filename)
138 prv = key_load_private(filename, "", NULL);
140 if (identity_passphrase)
141 pass = xstrdup(identity_passphrase);
143 pass = read_passphrase("Enter passphrase: ",
145 prv = key_load_private(filename, pass, NULL);
146 memset(pass, 0, strlen(pass));
152 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
153 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
154 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
155 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
158 do_convert_to_ssh2(struct passwd *pw)
166 ask_filename(pw, "Enter file in which the key is");
167 if (stat(identity_file, &st) < 0) {
168 perror(identity_file);
171 if ((k = key_load_public(identity_file, NULL)) == NULL) {
172 if ((k = load_identity(identity_file)) == NULL) {
173 fprintf(stderr, "load failed\n");
177 if (k->type == KEY_RSA1) {
178 fprintf(stderr, "version 1 keys are not supported\n");
181 if (key_to_blob(k, &blob, &len) <= 0) {
182 fprintf(stderr, "key_to_blob failed\n");
185 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
187 "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n",
188 key_size(k), key_type(k),
189 pw->pw_name, hostname);
190 dump_base64(stdout, blob, len);
191 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
198 buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
200 u_int bignum_bits = buffer_get_int(b);
201 u_int bytes = (bignum_bits + 7) / 8;
203 if (buffer_len(b) < bytes)
204 fatal("buffer_get_bignum_bits: input buffer too small: "
205 "need %d have %d", bytes, buffer_len(b));
206 BN_bin2bn(buffer_ptr(b), bytes, value);
207 buffer_consume(b, bytes);
211 do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
216 u_char *sig, data[] = "abcde12345";
217 int magic, rlen, ktype, i1, i2, i3, i4;
222 buffer_append(&b, blob, blen);
224 magic = buffer_get_int(&b);
225 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
226 error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
230 i1 = buffer_get_int(&b);
231 type = buffer_get_string(&b, NULL);
232 cipher = buffer_get_string(&b, NULL);
233 i2 = buffer_get_int(&b);
234 i3 = buffer_get_int(&b);
235 i4 = buffer_get_int(&b);
236 debug("ignore (%d %d %d %d)", i1,i2,i3,i4);
237 if (strcmp(cipher, "none") != 0) {
238 error("unsupported cipher %s", cipher);
246 if (strstr(type, "dsa")) {
248 } else if (strstr(type, "rsa")) {
255 key = key_new_private(ktype);
260 buffer_get_bignum_bits(&b, key->dsa->p);
261 buffer_get_bignum_bits(&b, key->dsa->g);
262 buffer_get_bignum_bits(&b, key->dsa->q);
263 buffer_get_bignum_bits(&b, key->dsa->pub_key);
264 buffer_get_bignum_bits(&b, key->dsa->priv_key);
267 e = buffer_get_char(&b);
271 e += buffer_get_char(&b);
274 e += buffer_get_char(&b);
277 if (!BN_set_word(key->rsa->e, e)) {
282 buffer_get_bignum_bits(&b, key->rsa->d);
283 buffer_get_bignum_bits(&b, key->rsa->n);
284 buffer_get_bignum_bits(&b, key->rsa->iqmp);
285 buffer_get_bignum_bits(&b, key->rsa->q);
286 buffer_get_bignum_bits(&b, key->rsa->p);
287 rsa_generate_additional_parameters(key->rsa);
290 rlen = buffer_len(&b);
292 error("do_convert_private_ssh2_from_blob: "
293 "remaining bytes in key blob %d", rlen);
297 key_sign(key, &sig, &slen, data, sizeof(data));
298 key_verify(key, sig, slen, data, sizeof(data));
304 do_convert_from_ssh2(struct passwd *pw)
313 int escaped = 0, private = 0, ok;
317 ask_filename(pw, "Enter file in which the key is");
318 if (stat(identity_file, &st) < 0) {
319 perror(identity_file);
322 fp = fopen(identity_file, "r");
324 perror(identity_file);
328 while (fgets(line, sizeof(line), fp)) {
329 if (!(p = strchr(line, '\n'))) {
330 fprintf(stderr, "input line too long.\n");
333 if (p > line && p[-1] == '\\')
335 if (strncmp(line, "----", 4) == 0 ||
336 strstr(line, ": ") != NULL) {
337 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
339 if (strstr(line, " END ") != NULL) {
342 /* fprintf(stderr, "ignore: %s", line); */
347 /* fprintf(stderr, "escaped: %s", line); */
351 strlcat(encoded, line, sizeof(encoded));
353 len = strlen(encoded);
354 if (((len % 4) == 3) &&
355 (encoded[len-1] == '=') &&
356 (encoded[len-2] == '=') &&
357 (encoded[len-3] == '='))
358 encoded[len-3] = '\0';
359 blen = uudecode(encoded, blob, sizeof(blob));
361 fprintf(stderr, "uudecode failed.\n");
365 do_convert_private_ssh2_from_blob(blob, blen) :
366 key_from_blob(blob, blen);
368 fprintf(stderr, "decode blob failed.\n");
372 (k->type == KEY_DSA ?
373 PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
374 PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
375 key_write(k, stdout);
377 fprintf(stderr, "key write failed");
382 fprintf(stdout, "\n");
388 do_print_public(struct passwd *pw)
394 ask_filename(pw, "Enter file in which the key is");
395 if (stat(identity_file, &st) < 0) {
396 perror(identity_file);
399 prv = load_identity(identity_file);
401 fprintf(stderr, "load failed\n");
404 if (!key_write(prv, stdout))
405 fprintf(stderr, "key_write failed");
407 fprintf(stdout, "\n");
413 do_upload(struct passwd *pw, const char *sc_reader_id)
420 ask_filename(pw, "Enter file in which the key is");
421 if (stat(identity_file, &st) < 0) {
422 perror(identity_file);
425 prv = load_identity(identity_file);
427 error("load failed");
430 ret = sc_put_key(prv, sc_reader_id);
434 logit("loading key done");
439 do_download(struct passwd *pw, const char *sc_reader_id)
444 keys = sc_get_keys(sc_reader_id, NULL);
446 fatal("cannot read public key from smartcard");
447 for (i = 0; keys[i]; i++) {
448 key_write(keys[i], stdout);
450 fprintf(stdout, "\n");
455 #endif /* SMARTCARD */
458 do_fingerprint(struct passwd *pw)
462 char *comment = NULL, *cp, *ep, line[16*1024], *fp;
463 int i, skip = 0, num = 1, invalid = 1;
468 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
469 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
472 ask_filename(pw, "Enter file in which the key is");
473 if (stat(identity_file, &st) < 0) {
474 perror(identity_file);
477 public = key_load_public(identity_file, &comment);
478 if (public != NULL) {
479 fp = key_fingerprint(public, fptype, rep);
480 printf("%u %s %s\n", key_size(public), fp, comment);
489 f = fopen(identity_file, "r");
491 while (fgets(line, sizeof(line), f)) {
492 i = strlen(line) - 1;
493 if (line[i] != '\n') {
494 error("line %d too long: %.40s...", num, line);
505 /* Skip leading whitespace, empty and comment lines. */
506 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
508 if (!*cp || *cp == '\n' || *cp == '#')
510 i = strtol(cp, &ep, 10);
511 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
514 for (; *cp && (quoted || (*cp != ' ' &&
515 *cp != '\t')); cp++) {
516 if (*cp == '\\' && cp[1] == '"')
517 cp++; /* Skip both */
526 public = key_new(KEY_RSA1);
527 if (key_read(public, &cp) != 1) {
530 public = key_new(KEY_UNSPEC);
531 if (key_read(public, &cp) != 1) {
536 comment = *cp ? cp : comment;
537 fp = key_fingerprint(public, fptype, rep);
538 printf("%u %s %s\n", key_size(public), fp,
539 comment ? comment : "no comment");
547 printf("%s is not a public key file.\n", identity_file);
554 print_host(FILE *f, char *name, Key *public, int hash)
556 if (hash && (name = host_hash(name, NULL, 0)) == NULL)
557 fatal("hash_host failed");
558 fprintf(f, "%s ", name);
559 if (!key_write(public, f))
560 fatal("key_write failed");
565 do_known_hosts(struct passwd *pw, const char *name)
567 FILE *in, *out = stdout;
569 char *cp, *cp2, *kp, *kp2;
570 char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN];
571 int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0;
573 if (!have_identity) {
574 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
575 if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
576 sizeof(identity_file))
577 fatal("Specified known hosts path too long");
581 if ((in = fopen(identity_file, "r")) == NULL)
582 fatal("fopen: %s", strerror(errno));
585 * Find hosts goes to stdout, hash and deletions happen in-place
586 * A corner case is ssh-keygen -HF foo, which should go to stdout
588 if (!find_host && (hash_hosts || delete_host)) {
589 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
590 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
591 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
592 strlcat(old, ".old", sizeof(old)) >= sizeof(old))
593 fatal("known_hosts path too long");
595 if ((c = mkstemp(tmp)) == -1)
596 fatal("mkstemp: %s", strerror(errno));
597 if ((out = fdopen(c, "w")) == NULL) {
600 fatal("fdopen: %s", strerror(c));
605 while (fgets(line, sizeof(line), in)) {
607 i = strlen(line) - 1;
608 if (line[i] != '\n') {
609 error("line %d too long: %.40s...", num, line);
620 /* Skip leading whitespace, empty and comment lines. */
621 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
623 if (!*cp || *cp == '\n' || *cp == '#') {
625 fprintf(out, "%s\n", cp);
628 /* Find the end of the host name portion. */
629 for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++)
631 if (*kp == '\0' || *(kp + 1) == '\0') {
632 error("line %d missing key: %.40s...",
640 public = key_new(KEY_RSA1);
641 if (key_read(public, &kp) != 1) {
644 public = key_new(KEY_UNSPEC);
645 if (key_read(public, &kp) != 1) {
646 error("line %d invalid key: %.40s...",
654 if (*cp == HASH_DELIM) {
655 if (find_host || delete_host) {
656 cp2 = host_hash(name, cp, strlen(cp));
658 error("line %d: invalid hashed "
659 "name: %.64s...", num, line);
663 c = (strcmp(cp2, cp) == 0);
664 if (find_host && c) {
665 printf("# Host %s found: "
666 "line %d type %s\n", name,
667 num, key_type(public));
668 print_host(out, cp, public, 0);
670 if (delete_host && !c)
671 print_host(out, cp, public, 0);
672 } else if (hash_hosts)
673 print_host(out, cp, public, 0);
675 if (find_host || delete_host) {
676 c = (match_hostname(name, cp,
678 if (find_host && c) {
679 printf("# Host %s found: "
680 "line %d type %s\n", name,
681 num, key_type(public));
682 print_host(out, cp, public, hash_hosts);
684 if (delete_host && !c)
685 print_host(out, cp, public, 0);
686 } else if (hash_hosts) {
687 for (cp2 = strsep(&cp, ",");
688 cp2 != NULL && *cp2 != '\0';
689 cp2 = strsep(&cp, ",")) {
690 if (strcspn(cp2, "*?!") != strlen(cp2))
691 fprintf(stderr, "Warning: "
692 "ignoring host name with "
693 "metacharacters: %.64s\n",
696 print_host(out, cp2, public, 1);
706 fprintf(stderr, "%s is not a valid known_host file.\n",
709 fprintf(stderr, "Not replacing existing known_hosts "
710 "file because of errors\n");
720 /* Backup existing file */
721 if (unlink(old) == -1 && errno != ENOENT)
722 fatal("unlink %.100s: %s", old, strerror(errno));
723 if (link(identity_file, old) == -1)
724 fatal("link %.100s to %.100s: %s", identity_file, old,
726 /* Move new one into place */
727 if (rename(tmp, identity_file) == -1) {
728 error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
735 fprintf(stderr, "%s updated.\n", identity_file);
736 fprintf(stderr, "Original contents retained as %s\n", old);
738 fprintf(stderr, "WARNING: %s contains unhashed "
740 fprintf(stderr, "Delete this file to ensure privacy "
749 * Perform changing a passphrase. The argument is the passwd structure
750 * for the current user.
753 do_change_passphrase(struct passwd *pw)
756 char *old_passphrase, *passphrase1, *passphrase2;
761 ask_filename(pw, "Enter file in which the key is");
762 if (stat(identity_file, &st) < 0) {
763 perror(identity_file);
766 /* Try to load the file with empty passphrase. */
767 private = key_load_private(identity_file, "", &comment);
768 if (private == NULL) {
769 if (identity_passphrase)
770 old_passphrase = xstrdup(identity_passphrase);
773 read_passphrase("Enter old passphrase: ",
775 private = key_load_private(identity_file, old_passphrase,
777 memset(old_passphrase, 0, strlen(old_passphrase));
778 xfree(old_passphrase);
779 if (private == NULL) {
780 printf("Bad passphrase.\n");
784 printf("Key has comment '%s'\n", comment);
786 /* Ask the new passphrase (twice). */
787 if (identity_new_passphrase) {
788 passphrase1 = xstrdup(identity_new_passphrase);
792 read_passphrase("Enter new passphrase (empty for no "
793 "passphrase): ", RP_ALLOW_STDIN);
794 passphrase2 = read_passphrase("Enter same passphrase again: ",
797 /* Verify that they are the same. */
798 if (strcmp(passphrase1, passphrase2) != 0) {
799 memset(passphrase1, 0, strlen(passphrase1));
800 memset(passphrase2, 0, strlen(passphrase2));
803 printf("Pass phrases do not match. Try again.\n");
806 /* Destroy the other copy. */
807 memset(passphrase2, 0, strlen(passphrase2));
811 /* Save the file using the new passphrase. */
812 if (!key_save_private(private, identity_file, passphrase1, comment)) {
813 printf("Saving the key failed: %s.\n", identity_file);
814 memset(passphrase1, 0, strlen(passphrase1));
820 /* Destroy the passphrase and the copy of the key in memory. */
821 memset(passphrase1, 0, strlen(passphrase1));
823 key_free(private); /* Destroys contents */
826 printf("Your identification has been saved with the new passphrase.\n");
831 * Print the SSHFP RR.
834 do_print_resource_record(struct passwd *pw, char *hname)
837 char *comment = NULL;
841 ask_filename(pw, "Enter file in which the key is");
842 if (stat(identity_file, &st) < 0) {
843 perror(identity_file);
846 public = key_load_public(identity_file, &comment);
847 if (public != NULL) {
848 export_dns_rr(hname, public, stdout, print_generic);
856 printf("failed to read v2 public key from %s.\n", identity_file);
861 * Change the comment of a private key file.
864 do_change_comment(struct passwd *pw)
866 char new_comment[1024], *comment, *passphrase;
874 ask_filename(pw, "Enter file in which the key is");
875 if (stat(identity_file, &st) < 0) {
876 perror(identity_file);
879 private = key_load_private(identity_file, "", &comment);
880 if (private == NULL) {
881 if (identity_passphrase)
882 passphrase = xstrdup(identity_passphrase);
883 else if (identity_new_passphrase)
884 passphrase = xstrdup(identity_new_passphrase);
886 passphrase = read_passphrase("Enter passphrase: ",
888 /* Try to load using the passphrase. */
889 private = key_load_private(identity_file, passphrase, &comment);
890 if (private == NULL) {
891 memset(passphrase, 0, strlen(passphrase));
893 printf("Bad passphrase.\n");
897 passphrase = xstrdup("");
899 if (private->type != KEY_RSA1) {
900 fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
904 printf("Key now has comment '%s'\n", comment);
906 if (identity_comment) {
907 strlcpy(new_comment, identity_comment, sizeof(new_comment));
909 printf("Enter new comment: ");
911 if (!fgets(new_comment, sizeof(new_comment), stdin)) {
912 memset(passphrase, 0, strlen(passphrase));
916 if (strchr(new_comment, '\n'))
917 *strchr(new_comment, '\n') = 0;
920 /* Save the file using the new passphrase. */
921 if (!key_save_private(private, identity_file, passphrase, new_comment)) {
922 printf("Saving the key failed: %s.\n", identity_file);
923 memset(passphrase, 0, strlen(passphrase));
929 memset(passphrase, 0, strlen(passphrase));
931 public = key_from_private(private);
934 strlcat(identity_file, ".pub", sizeof(identity_file));
935 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
937 printf("Could not save your public key in %s\n", identity_file);
942 printf("fdopen %s failed", identity_file);
945 if (!key_write(public, f))
946 fprintf(stderr, "write key failed");
948 fprintf(f, " %s\n", new_comment);
953 printf("The comment in your key file has been changed.\n");
960 fprintf(stderr, "Usage: %s [options]\n", __progname);
961 fprintf(stderr, "Options:\n");
962 fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n");
963 fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
964 fprintf(stderr, " -b bits Number of bits in the key to create.\n");
965 fprintf(stderr, " -C comment Provide new comment.\n");
966 fprintf(stderr, " -c Change comment in private and public key files.\n");
968 fprintf(stderr, " -D reader Download public key from smartcard.\n");
969 #endif /* SMARTCARD */
970 fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n");
971 fprintf(stderr, " -F hostname Find hostname in known hosts file.\n");
972 fprintf(stderr, " -f filename Filename of the key file.\n");
973 fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n");
974 fprintf(stderr, " -g Use generic DNS resource record format.\n");
975 fprintf(stderr, " -H Hash names in known_hosts file.\n");
976 fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n");
977 fprintf(stderr, " -l Show fingerprint of key file.\n");
978 fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n");
979 fprintf(stderr, " -N phrase Provide new passphrase.\n");
980 fprintf(stderr, " -P phrase Provide old passphrase.\n");
981 fprintf(stderr, " -p Change passphrase of private key file.\n");
982 fprintf(stderr, " -q Quiet.\n");
983 fprintf(stderr, " -R hostname Remove host from known_hosts file.\n");
984 fprintf(stderr, " -r hostname Print DNS resource record.\n");
985 fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n");
986 fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n");
987 fprintf(stderr, " -t type Specify type of key to create.\n");
989 fprintf(stderr, " -U reader Upload private key to smartcard.\n");
990 #endif /* SMARTCARD */
991 fprintf(stderr, " -v Verbose.\n");
992 fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n");
993 fprintf(stderr, " -y Read private key file and print public key.\n");
999 * Main program for key management.
1002 main(int ac, char **av)
1004 char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1005 char out_file[MAXPATHLEN], *reader_id = NULL;
1006 char *rr_hostname = NULL;
1007 Key *private, *public;
1010 int opt, type, fd, download = 0, memory = 0;
1011 int generator_wanted = 0, trials = 100;
1012 int do_gen_candidates = 0, do_screen_candidates = 0;
1013 int log_level = SYSLOG_LEVEL_INFO;
1014 BIGNUM *start = NULL;
1018 extern char *optarg;
1020 __progname = ssh_get_progname(av[0]);
1022 SSLeay_add_all_algorithms();
1023 log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1028 /* we need this for the home * directory. */
1029 pw = getpwuid(getuid());
1031 printf("You don't exist, go away!\n");
1034 if (gethostname(hostname, sizeof(hostname)) < 0) {
1035 perror("gethostname");
1039 while ((opt = getopt(ac, av,
1040 "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) {
1043 bits = atoi(optarg);
1044 if (bits < 512 || bits > 32768) {
1045 printf("Bits has bad value.\n");
1051 rr_hostname = optarg;
1058 rr_hostname = optarg;
1061 print_fingerprint = 1;
1064 print_bubblebabble = 1;
1067 change_passphrase = 1;
1073 strlcpy(identity_file, optarg, sizeof(identity_file));
1080 identity_passphrase = optarg;
1083 identity_new_passphrase = optarg;
1086 identity_comment = optarg;
1094 convert_to_ssh2 = 1;
1099 convert_from_ssh2 = 1;
1105 key_type_name = "dsa";
1108 key_type_name = optarg;
1116 if (log_level == SYSLOG_LEVEL_INFO)
1117 log_level = SYSLOG_LEVEL_DEBUG1;
1119 if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1120 log_level < SYSLOG_LEVEL_DEBUG3)
1125 rr_hostname = optarg;
1128 generator_wanted = atoi(optarg);
1129 if (generator_wanted < 1)
1130 fatal("Desired generator has bad value.");
1133 trials = atoi(optarg);
1136 memory = atoi(optarg);
1139 do_gen_candidates = 1;
1140 strlcpy(out_file, optarg, sizeof(out_file));
1143 do_screen_candidates = 1;
1144 strlcpy(out_file, optarg, sizeof(out_file));
1147 /* XXX - also compare length against bits */
1148 if (BN_hex2bn(&start, optarg) == 0)
1149 fatal("Invalid start point.");
1158 log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1);
1161 printf("Too many arguments.\n");
1164 if (change_passphrase && change_comment) {
1165 printf("Can only have one of -p and -c.\n");
1168 if (delete_host || hash_hosts || find_host)
1169 do_known_hosts(pw, rr_hostname);
1170 if (print_fingerprint || print_bubblebabble)
1172 if (change_passphrase)
1173 do_change_passphrase(pw);
1175 do_change_comment(pw);
1176 if (convert_to_ssh2)
1177 do_convert_to_ssh2(pw);
1178 if (convert_from_ssh2)
1179 do_convert_from_ssh2(pw);
1181 do_print_public(pw);
1182 if (rr_hostname != NULL) {
1183 do_print_resource_record(pw, rr_hostname);
1185 if (reader_id != NULL) {
1188 do_download(pw, reader_id);
1190 do_upload(pw, reader_id);
1191 #else /* SMARTCARD */
1192 fatal("no support for smartcards.");
1193 #endif /* SMARTCARD */
1196 if (do_gen_candidates) {
1197 FILE *out = fopen(out_file, "w");
1200 error("Couldn't open modulus candidate file \"%s\": %s",
1201 out_file, strerror(errno));
1204 if (gen_candidates(out, memory, bits, start) != 0)
1205 fatal("modulus candidate generation failed\n");
1210 if (do_screen_candidates) {
1212 FILE *out = fopen(out_file, "w");
1214 if (have_identity && strcmp(identity_file, "-") != 0) {
1215 if ((in = fopen(identity_file, "r")) == NULL) {
1216 fatal("Couldn't open modulus candidate "
1217 "file \"%s\": %s", identity_file,
1224 fatal("Couldn't open moduli file \"%s\": %s",
1225 out_file, strerror(errno));
1227 if (prime_test(in, out, trials, generator_wanted) != 0)
1228 fatal("modulus screening failed\n");
1234 if (key_type_name == NULL) {
1235 printf("You must specify a key type (-t).\n");
1238 type = key_type_from_name(key_type_name);
1239 if (type == KEY_UNSPEC) {
1240 fprintf(stderr, "unknown key type %s\n", key_type_name);
1244 printf("Generating public/private %s key pair.\n", key_type_name);
1245 private = key_generate(type, bits);
1246 if (private == NULL) {
1247 fprintf(stderr, "key_generate failed");
1250 public = key_from_private(private);
1253 ask_filename(pw, "Enter file in which to save the key");
1255 /* Create ~/.ssh directory if it doesn\'t already exist. */
1256 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
1257 if (strstr(identity_file, dotsshdir) != NULL &&
1258 stat(dotsshdir, &st) < 0) {
1259 if (mkdir(dotsshdir, 0700) < 0)
1260 error("Could not create directory '%s'.", dotsshdir);
1262 printf("Created directory '%s'.\n", dotsshdir);
1264 /* If the file already exists, ask the user to confirm. */
1265 if (stat(identity_file, &st) >= 0) {
1267 printf("%s already exists.\n", identity_file);
1268 printf("Overwrite (y/n)? ");
1270 if (fgets(yesno, sizeof(yesno), stdin) == NULL)
1272 if (yesno[0] != 'y' && yesno[0] != 'Y')
1275 /* Ask for a passphrase (twice). */
1276 if (identity_passphrase)
1277 passphrase1 = xstrdup(identity_passphrase);
1278 else if (identity_new_passphrase)
1279 passphrase1 = xstrdup(identity_new_passphrase);
1283 read_passphrase("Enter passphrase (empty for no "
1284 "passphrase): ", RP_ALLOW_STDIN);
1285 passphrase2 = read_passphrase("Enter same passphrase again: ",
1287 if (strcmp(passphrase1, passphrase2) != 0) {
1289 * The passphrases do not match. Clear them and
1292 memset(passphrase1, 0, strlen(passphrase1));
1293 memset(passphrase2, 0, strlen(passphrase2));
1296 printf("Passphrases do not match. Try again.\n");
1297 goto passphrase_again;
1299 /* Clear the other copy of the passphrase. */
1300 memset(passphrase2, 0, strlen(passphrase2));
1304 if (identity_comment) {
1305 strlcpy(comment, identity_comment, sizeof(comment));
1307 /* Create default commend field for the passphrase. */
1308 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
1311 /* Save the key with the given passphrase and comment. */
1312 if (!key_save_private(private, identity_file, passphrase1, comment)) {
1313 printf("Saving the key failed: %s.\n", identity_file);
1314 memset(passphrase1, 0, strlen(passphrase1));
1318 /* Clear the passphrase. */
1319 memset(passphrase1, 0, strlen(passphrase1));
1322 /* Clear the private key and the random number generator. */
1327 printf("Your identification has been saved in %s.\n", identity_file);
1329 strlcat(identity_file, ".pub", sizeof(identity_file));
1330 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1332 printf("Could not save your public key in %s\n", identity_file);
1335 f = fdopen(fd, "w");
1337 printf("fdopen %s failed", identity_file);
1340 if (!key_write(public, f))
1341 fprintf(stderr, "write key failed");
1342 fprintf(f, " %s\n", comment);
1346 char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1347 printf("Your public key has been saved in %s.\n",
1349 printf("The key fingerprint is:\n");
1350 printf("%s %s\n", fp, comment);