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 1.111 2003/11/21 11:57:03 djm Exp $");
17 #include <openssl/evp.h>
18 #include <openssl/pem.h>
27 #include "pathnames.h"
37 /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */
41 * Flag indicating that we just want to change the passphrase. This can be
42 * set on the command line.
44 int change_passphrase = 0;
47 * Flag indicating that we just want to change the comment. This can be set
48 * on the command line.
50 int change_comment = 0;
54 /* Flag indicating that we just want to see the key fingerprint */
55 int print_fingerprint = 0;
56 int print_bubblebabble = 0;
58 /* The identity file name, given on the command line or entered by the user. */
59 char identity_file[1024];
60 int have_identity = 0;
62 /* This is set to the passphrase if given on the command line. */
63 char *identity_passphrase = NULL;
65 /* This is set to the new passphrase if given on the command line. */
66 char *identity_new_passphrase = NULL;
68 /* This is set to the new comment if given on the command line. */
69 char *identity_comment = NULL;
71 /* Dump public key file in format used by real and the original SSH 2 */
72 int convert_to_ssh2 = 0;
73 int convert_from_ssh2 = 0;
75 int print_generic = 0;
77 char *key_type_name = NULL;
80 #ifdef HAVE___PROGNAME
81 extern char *__progname;
86 char hostname[MAXHOSTNAMELEN];
89 ask_filename(struct passwd *pw, const char *prompt)
94 if (key_type_name == NULL)
95 name = _PATH_SSH_CLIENT_ID_RSA;
97 switch (key_type_from_name(key_type_name)) {
99 name = _PATH_SSH_CLIENT_IDENTITY;
102 name = _PATH_SSH_CLIENT_ID_DSA;
105 name = _PATH_SSH_CLIENT_ID_RSA;
108 fprintf(stderr, "bad key type");
113 snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
114 fprintf(stderr, "%s (%s): ", prompt, identity_file);
115 if (fgets(buf, sizeof(buf), stdin) == NULL)
117 if (strchr(buf, '\n'))
118 *strchr(buf, '\n') = 0;
119 if (strcmp(buf, "") != 0)
120 strlcpy(identity_file, buf, sizeof(identity_file));
125 load_identity(char *filename)
130 prv = key_load_private(filename, "", NULL);
132 if (identity_passphrase)
133 pass = xstrdup(identity_passphrase);
135 pass = read_passphrase("Enter passphrase: ",
137 prv = key_load_private(filename, pass, NULL);
138 memset(pass, 0, strlen(pass));
144 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
145 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
146 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
147 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
150 do_convert_to_ssh2(struct passwd *pw)
158 ask_filename(pw, "Enter file in which the key is");
159 if (stat(identity_file, &st) < 0) {
160 perror(identity_file);
163 if ((k = key_load_public(identity_file, NULL)) == NULL) {
164 if ((k = load_identity(identity_file)) == NULL) {
165 fprintf(stderr, "load failed\n");
169 if (k->type == KEY_RSA1) {
170 fprintf(stderr, "version 1 keys are not supported\n");
173 if (key_to_blob(k, &blob, &len) <= 0) {
174 fprintf(stderr, "key_to_blob failed\n");
177 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
179 "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n",
180 key_size(k), key_type(k),
181 pw->pw_name, hostname);
182 dump_base64(stdout, blob, len);
183 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
190 buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
192 u_int bits = buffer_get_int(b);
193 u_int bytes = (bits + 7) / 8;
195 if (buffer_len(b) < bytes)
196 fatal("buffer_get_bignum_bits: input buffer too small: "
197 "need %d have %d", bytes, buffer_len(b));
198 BN_bin2bn(buffer_ptr(b), bytes, value);
199 buffer_consume(b, bytes);
203 do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
208 u_char *sig, data[] = "abcde12345";
209 int magic, rlen, ktype, i1, i2, i3, i4;
214 buffer_append(&b, blob, blen);
216 magic = buffer_get_int(&b);
217 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
218 error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
222 i1 = buffer_get_int(&b);
223 type = buffer_get_string(&b, NULL);
224 cipher = buffer_get_string(&b, NULL);
225 i2 = buffer_get_int(&b);
226 i3 = buffer_get_int(&b);
227 i4 = buffer_get_int(&b);
228 debug("ignore (%d %d %d %d)", i1,i2,i3,i4);
229 if (strcmp(cipher, "none") != 0) {
230 error("unsupported cipher %s", cipher);
238 if (strstr(type, "dsa")) {
240 } else if (strstr(type, "rsa")) {
246 key = key_new_private(ktype);
251 buffer_get_bignum_bits(&b, key->dsa->p);
252 buffer_get_bignum_bits(&b, key->dsa->g);
253 buffer_get_bignum_bits(&b, key->dsa->q);
254 buffer_get_bignum_bits(&b, key->dsa->pub_key);
255 buffer_get_bignum_bits(&b, key->dsa->priv_key);
258 e = buffer_get_char(&b);
262 e += buffer_get_char(&b);
265 e += buffer_get_char(&b);
268 if (!BN_set_word(key->rsa->e, e)) {
273 buffer_get_bignum_bits(&b, key->rsa->d);
274 buffer_get_bignum_bits(&b, key->rsa->n);
275 buffer_get_bignum_bits(&b, key->rsa->iqmp);
276 buffer_get_bignum_bits(&b, key->rsa->q);
277 buffer_get_bignum_bits(&b, key->rsa->p);
278 rsa_generate_additional_parameters(key->rsa);
281 rlen = buffer_len(&b);
283 error("do_convert_private_ssh2_from_blob: "
284 "remaining bytes in key blob %d", rlen);
288 key_sign(key, &sig, &slen, data, sizeof(data));
289 key_verify(key, sig, slen, data, sizeof(data));
295 do_convert_from_ssh2(struct passwd *pw)
304 int escaped = 0, private = 0, ok;
308 ask_filename(pw, "Enter file in which the key is");
309 if (stat(identity_file, &st) < 0) {
310 perror(identity_file);
313 fp = fopen(identity_file, "r");
315 perror(identity_file);
319 while (fgets(line, sizeof(line), fp)) {
320 if (!(p = strchr(line, '\n'))) {
321 fprintf(stderr, "input line too long.\n");
324 if (p > line && p[-1] == '\\')
326 if (strncmp(line, "----", 4) == 0 ||
327 strstr(line, ": ") != NULL) {
328 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
330 if (strstr(line, " END ") != NULL) {
333 /* fprintf(stderr, "ignore: %s", line); */
338 /* fprintf(stderr, "escaped: %s", line); */
342 strlcat(encoded, line, sizeof(encoded));
344 len = strlen(encoded);
345 if (((len % 4) == 3) &&
346 (encoded[len-1] == '=') &&
347 (encoded[len-2] == '=') &&
348 (encoded[len-3] == '='))
349 encoded[len-3] = '\0';
350 blen = uudecode(encoded, blob, sizeof(blob));
352 fprintf(stderr, "uudecode failed.\n");
356 do_convert_private_ssh2_from_blob(blob, blen) :
357 key_from_blob(blob, blen);
359 fprintf(stderr, "decode blob failed.\n");
363 (k->type == KEY_DSA ?
364 PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
365 PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
366 key_write(k, stdout);
368 fprintf(stderr, "key write failed");
373 fprintf(stdout, "\n");
379 do_print_public(struct passwd *pw)
385 ask_filename(pw, "Enter file in which the key is");
386 if (stat(identity_file, &st) < 0) {
387 perror(identity_file);
390 prv = load_identity(identity_file);
392 fprintf(stderr, "load failed\n");
395 if (!key_write(prv, stdout))
396 fprintf(stderr, "key_write failed");
398 fprintf(stdout, "\n");
404 do_upload(struct passwd *pw, const char *sc_reader_id)
411 ask_filename(pw, "Enter file in which the key is");
412 if (stat(identity_file, &st) < 0) {
413 perror(identity_file);
416 prv = load_identity(identity_file);
418 error("load failed");
421 ret = sc_put_key(prv, sc_reader_id);
425 logit("loading key done");
430 do_download(struct passwd *pw, const char *sc_reader_id)
435 keys = sc_get_keys(sc_reader_id, NULL);
437 fatal("cannot read public key from smartcard");
438 for (i = 0; keys[i]; i++) {
439 key_write(keys[i], stdout);
441 fprintf(stdout, "\n");
446 #endif /* SMARTCARD */
449 do_fingerprint(struct passwd *pw)
453 char *comment = NULL, *cp, *ep, line[16*1024], *fp;
454 int i, skip = 0, num = 1, invalid = 1;
459 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
460 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
463 ask_filename(pw, "Enter file in which the key is");
464 if (stat(identity_file, &st) < 0) {
465 perror(identity_file);
468 public = key_load_public(identity_file, &comment);
469 if (public != NULL) {
470 fp = key_fingerprint(public, fptype, rep);
471 printf("%u %s %s\n", key_size(public), fp, comment);
480 f = fopen(identity_file, "r");
482 while (fgets(line, sizeof(line), f)) {
483 i = strlen(line) - 1;
484 if (line[i] != '\n') {
485 error("line %d too long: %.40s...", num, line);
496 /* Skip leading whitespace, empty and comment lines. */
497 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
499 if (!*cp || *cp == '\n' || *cp == '#')
501 i = strtol(cp, &ep, 10);
502 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
505 for (; *cp && (quoted || (*cp != ' ' &&
506 *cp != '\t')); cp++) {
507 if (*cp == '\\' && cp[1] == '"')
508 cp++; /* Skip both */
517 public = key_new(KEY_RSA1);
518 if (key_read(public, &cp) != 1) {
521 public = key_new(KEY_UNSPEC);
522 if (key_read(public, &cp) != 1) {
527 comment = *cp ? cp : comment;
528 fp = key_fingerprint(public, fptype, rep);
529 printf("%u %s %s\n", key_size(public), fp,
530 comment ? comment : "no comment");
538 printf("%s is not a public key file.\n", identity_file);
545 * Perform changing a passphrase. The argument is the passwd structure
546 * for the current user.
549 do_change_passphrase(struct passwd *pw)
552 char *old_passphrase, *passphrase1, *passphrase2;
557 ask_filename(pw, "Enter file in which the key is");
558 if (stat(identity_file, &st) < 0) {
559 perror(identity_file);
562 /* Try to load the file with empty passphrase. */
563 private = key_load_private(identity_file, "", &comment);
564 if (private == NULL) {
565 if (identity_passphrase)
566 old_passphrase = xstrdup(identity_passphrase);
569 read_passphrase("Enter old passphrase: ",
571 private = key_load_private(identity_file, old_passphrase,
573 memset(old_passphrase, 0, strlen(old_passphrase));
574 xfree(old_passphrase);
575 if (private == NULL) {
576 printf("Bad passphrase.\n");
580 printf("Key has comment '%s'\n", comment);
582 /* Ask the new passphrase (twice). */
583 if (identity_new_passphrase) {
584 passphrase1 = xstrdup(identity_new_passphrase);
588 read_passphrase("Enter new passphrase (empty for no "
589 "passphrase): ", RP_ALLOW_STDIN);
590 passphrase2 = read_passphrase("Enter same passphrase again: ",
593 /* Verify that they are the same. */
594 if (strcmp(passphrase1, passphrase2) != 0) {
595 memset(passphrase1, 0, strlen(passphrase1));
596 memset(passphrase2, 0, strlen(passphrase2));
599 printf("Pass phrases do not match. Try again.\n");
602 /* Destroy the other copy. */
603 memset(passphrase2, 0, strlen(passphrase2));
607 /* Save the file using the new passphrase. */
608 if (!key_save_private(private, identity_file, passphrase1, comment)) {
609 printf("Saving the key failed: %s.\n", identity_file);
610 memset(passphrase1, 0, strlen(passphrase1));
616 /* Destroy the passphrase and the copy of the key in memory. */
617 memset(passphrase1, 0, strlen(passphrase1));
619 key_free(private); /* Destroys contents */
622 printf("Your identification has been saved with the new passphrase.\n");
627 * Print the SSHFP RR.
630 do_print_resource_record(struct passwd *pw, char *hostname)
633 char *comment = NULL;
637 ask_filename(pw, "Enter file in which the key is");
638 if (stat(identity_file, &st) < 0) {
639 perror(identity_file);
642 public = key_load_public(identity_file, &comment);
643 if (public != NULL) {
644 export_dns_rr(hostname, public, stdout, print_generic);
652 printf("failed to read v2 public key from %s.\n", identity_file);
657 * Change the comment of a private key file.
660 do_change_comment(struct passwd *pw)
662 char new_comment[1024], *comment, *passphrase;
670 ask_filename(pw, "Enter file in which the key is");
671 if (stat(identity_file, &st) < 0) {
672 perror(identity_file);
675 private = key_load_private(identity_file, "", &comment);
676 if (private == NULL) {
677 if (identity_passphrase)
678 passphrase = xstrdup(identity_passphrase);
679 else if (identity_new_passphrase)
680 passphrase = xstrdup(identity_new_passphrase);
682 passphrase = read_passphrase("Enter passphrase: ",
684 /* Try to load using the passphrase. */
685 private = key_load_private(identity_file, passphrase, &comment);
686 if (private == NULL) {
687 memset(passphrase, 0, strlen(passphrase));
689 printf("Bad passphrase.\n");
693 passphrase = xstrdup("");
695 if (private->type != KEY_RSA1) {
696 fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
700 printf("Key now has comment '%s'\n", comment);
702 if (identity_comment) {
703 strlcpy(new_comment, identity_comment, sizeof(new_comment));
705 printf("Enter new comment: ");
707 if (!fgets(new_comment, sizeof(new_comment), stdin)) {
708 memset(passphrase, 0, strlen(passphrase));
712 if (strchr(new_comment, '\n'))
713 *strchr(new_comment, '\n') = 0;
716 /* Save the file using the new passphrase. */
717 if (!key_save_private(private, identity_file, passphrase, new_comment)) {
718 printf("Saving the key failed: %s.\n", identity_file);
719 memset(passphrase, 0, strlen(passphrase));
725 memset(passphrase, 0, strlen(passphrase));
727 public = key_from_private(private);
730 strlcat(identity_file, ".pub", sizeof(identity_file));
731 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
733 printf("Could not save your public key in %s\n", identity_file);
738 printf("fdopen %s failed", identity_file);
741 if (!key_write(public, f))
742 fprintf(stderr, "write key failed");
744 fprintf(f, " %s\n", new_comment);
749 printf("The comment in your key file has been changed.\n");
756 fprintf(stderr, "Usage: %s [options]\n", __progname);
757 fprintf(stderr, "Options:\n");
758 fprintf(stderr, " -b bits Number of bits in the key to create.\n");
759 fprintf(stderr, " -c Change comment in private and public key files.\n");
760 fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n");
761 fprintf(stderr, " -f filename Filename of the key file.\n");
762 fprintf(stderr, " -g Use generic DNS resource record format.\n");
763 fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n");
764 fprintf(stderr, " -l Show fingerprint of key file.\n");
765 fprintf(stderr, " -p Change passphrase of private key file.\n");
766 fprintf(stderr, " -q Quiet.\n");
767 fprintf(stderr, " -y Read private key file and print public key.\n");
768 fprintf(stderr, " -t type Specify type of key to create.\n");
769 fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
770 fprintf(stderr, " -C comment Provide new comment.\n");
771 fprintf(stderr, " -N phrase Provide new passphrase.\n");
772 fprintf(stderr, " -P phrase Provide old passphrase.\n");
773 fprintf(stderr, " -r hostname Print DNS resource record.\n");
775 fprintf(stderr, " -D reader Download public key from smartcard.\n");
776 fprintf(stderr, " -U reader Upload private key to smartcard.\n");
777 #endif /* SMARTCARD */
779 fprintf(stderr, " -G file Generate candidates for DH-GEX moduli\n");
780 fprintf(stderr, " -T file Screen candidates for DH-GEX moduli\n");
786 * Main program for key management.
789 main(int ac, char **av)
791 char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
792 char out_file[MAXPATHLEN], *reader_id = NULL;
793 char *resource_record_hostname = NULL;
794 Key *private, *public;
797 int opt, type, fd, download = 0, memory = 0;
798 int generator_wanted = 0, trials = 100;
799 int do_gen_candidates = 0, do_screen_candidates = 0;
800 BIGNUM *start = NULL;
806 __progname = ssh_get_progname(av[0]);
808 SSLeay_add_all_algorithms();
809 log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
814 /* we need this for the home * directory. */
815 pw = getpwuid(getuid());
817 printf("You don't exist, go away!\n");
820 if (gethostname(hostname, sizeof(hostname)) < 0) {
821 perror("gethostname");
825 while ((opt = getopt(ac, av,
826 "degiqpclBRxXyb:f:t:U:D:P:N:C:r:g:T:G:M:S:a:W:")) != -1) {
830 if (bits < 512 || bits > 32768) {
831 printf("Bits has bad value.\n");
836 print_fingerprint = 1;
839 print_bubblebabble = 1;
842 change_passphrase = 1;
848 strlcpy(identity_file, optarg, sizeof(identity_file));
855 identity_passphrase = optarg;
858 identity_new_passphrase = optarg;
861 identity_comment = optarg;
878 convert_from_ssh2 = 1;
884 key_type_name = "dsa";
887 key_type_name = optarg;
895 resource_record_hostname = optarg;
898 generator_wanted = atoi(optarg);
899 if (generator_wanted < 1)
900 fatal("Desired generator has bad value.");
903 trials = atoi(optarg);
904 if (trials < TRIAL_MINIMUM) {
905 fatal("Minimum primality trials is %d",
910 memory = atoi(optarg);
912 (memory < LARGE_MINIMUM || memory > LARGE_MAXIMUM)) {
913 fatal("Invalid memory amount (min %ld, max %ld)",
914 LARGE_MINIMUM, LARGE_MAXIMUM);
918 do_gen_candidates = 1;
919 strlcpy(out_file, optarg, sizeof(out_file));
922 do_screen_candidates = 1;
923 strlcpy(out_file, optarg, sizeof(out_file));
926 /* XXX - also compare length against bits */
927 if (BN_hex2bn(&start, optarg) == 0)
928 fatal("Invalid start point.");
936 printf("Too many arguments.\n");
939 if (change_passphrase && change_comment) {
940 printf("Can only have one of -p and -c.\n");
943 if (print_fingerprint || print_bubblebabble)
945 if (change_passphrase)
946 do_change_passphrase(pw);
948 do_change_comment(pw);
950 do_convert_to_ssh2(pw);
951 if (convert_from_ssh2)
952 do_convert_from_ssh2(pw);
955 if (resource_record_hostname != NULL) {
956 do_print_resource_record(pw, resource_record_hostname);
958 if (reader_id != NULL) {
961 do_download(pw, reader_id);
963 do_upload(pw, reader_id);
964 #else /* SMARTCARD */
965 fatal("no support for smartcards.");
966 #endif /* SMARTCARD */
969 if (do_gen_candidates) {
970 FILE *out = fopen(out_file, "w");
973 error("Couldn't open modulus candidate file \"%s\": %s",
974 out_file, strerror(errno));
977 if (gen_candidates(out, memory, bits, start) != 0)
978 fatal("modulus candidate generation failed\n");
983 if (do_screen_candidates) {
985 FILE *out = fopen(out_file, "w");
987 if (have_identity && strcmp(identity_file, "-") != 0) {
988 if ((in = fopen(identity_file, "r")) == NULL) {
989 fatal("Couldn't open modulus candidate "
990 "file \"%s\": %s", identity_file,
997 fatal("Couldn't open moduli file \"%s\": %s",
998 out_file, strerror(errno));
1000 if (prime_test(in, out, trials, generator_wanted) != 0)
1001 fatal("modulus screening failed\n");
1007 if (key_type_name == NULL) {
1008 printf("You must specify a key type (-t).\n");
1011 type = key_type_from_name(key_type_name);
1012 if (type == KEY_UNSPEC) {
1013 fprintf(stderr, "unknown key type %s\n", key_type_name);
1017 printf("Generating public/private %s key pair.\n", key_type_name);
1018 private = key_generate(type, bits);
1019 if (private == NULL) {
1020 fprintf(stderr, "key_generate failed");
1023 public = key_from_private(private);
1026 ask_filename(pw, "Enter file in which to save the key");
1028 /* Create ~/.ssh directory if it doesn\'t already exist. */
1029 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
1030 if (strstr(identity_file, dotsshdir) != NULL &&
1031 stat(dotsshdir, &st) < 0) {
1032 if (mkdir(dotsshdir, 0700) < 0)
1033 error("Could not create directory '%s'.", dotsshdir);
1035 printf("Created directory '%s'.\n", dotsshdir);
1037 /* If the file already exists, ask the user to confirm. */
1038 if (stat(identity_file, &st) >= 0) {
1040 printf("%s already exists.\n", identity_file);
1041 printf("Overwrite (y/n)? ");
1043 if (fgets(yesno, sizeof(yesno), stdin) == NULL)
1045 if (yesno[0] != 'y' && yesno[0] != 'Y')
1048 /* Ask for a passphrase (twice). */
1049 if (identity_passphrase)
1050 passphrase1 = xstrdup(identity_passphrase);
1051 else if (identity_new_passphrase)
1052 passphrase1 = xstrdup(identity_new_passphrase);
1056 read_passphrase("Enter passphrase (empty for no "
1057 "passphrase): ", RP_ALLOW_STDIN);
1058 passphrase2 = read_passphrase("Enter same passphrase again: ",
1060 if (strcmp(passphrase1, passphrase2) != 0) {
1062 * The passphrases do not match. Clear them and
1065 memset(passphrase1, 0, strlen(passphrase1));
1066 memset(passphrase2, 0, strlen(passphrase2));
1069 printf("Passphrases do not match. Try again.\n");
1070 goto passphrase_again;
1072 /* Clear the other copy of the passphrase. */
1073 memset(passphrase2, 0, strlen(passphrase2));
1077 if (identity_comment) {
1078 strlcpy(comment, identity_comment, sizeof(comment));
1080 /* Create default commend field for the passphrase. */
1081 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
1084 /* Save the key with the given passphrase and comment. */
1085 if (!key_save_private(private, identity_file, passphrase1, comment)) {
1086 printf("Saving the key failed: %s.\n", identity_file);
1087 memset(passphrase1, 0, strlen(passphrase1));
1091 /* Clear the passphrase. */
1092 memset(passphrase1, 0, strlen(passphrase1));
1095 /* Clear the private key and the random number generator. */
1100 printf("Your identification has been saved in %s.\n", identity_file);
1102 strlcat(identity_file, ".pub", sizeof(identity_file));
1103 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1105 printf("Could not save your public key in %s\n", identity_file);
1108 f = fdopen(fd, "w");
1110 printf("fdopen %s failed", identity_file);
1113 if (!key_write(public, f))
1114 fprintf(stderr, "write key failed");
1115 fprintf(f, " %s\n", comment);
1119 char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1120 printf("Your public key has been saved in %s.\n",
1122 printf("The key fingerprint is:\n");
1123 printf("%s %s\n", fp, comment);