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- dtucker@cvs.openbsd.org 2010/01/09 05:17:00
[openssh-git.git] / ssh-keygen.c
blob4f90ac5c1c7e2f6d9314645a501bae6ff5c224f2
1 /* $OpenBSD: ssh-keygen.c,v 1.175 2009/08/27 17:33:49 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 #include <sys/param.h>
21
22 #include <openssl/evp.h>
23 #include <openssl/pem.h>
24 #include "openbsd-compat/openssl-compat.h"
25
26 #include <errno.h>
27 #include <fcntl.h>
28 #include <netdb.h>
29 #ifdef HAVE_PATHS_H
30 # include <paths.h>
31 #endif
32 #include <pwd.h>
33 #include <stdarg.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38
39 #include "xmalloc.h"
40 #include "key.h"
41 #include "rsa.h"
42 #include "authfile.h"
43 #include "uuencode.h"
44 #include "buffer.h"
45 #include "pathnames.h"
46 #include "log.h"
47 #include "misc.h"
48 #include "match.h"
49 #include "hostfile.h"
50 #include "dns.h"
51
52 #ifdef SMARTCARD
53 #include "scard.h"
54 #endif
55
56 /* Number of bits in the RSA/DSA key. This value can be set on the command line. */
57 #define DEFAULT_BITS 2048
58 #define DEFAULT_BITS_DSA 1024
59 u_int32_t bits = 0;
60
61 /*
62 * Flag indicating that we just want to change the passphrase. This can be
63 * set on the command line.
64 */
65 int change_passphrase = 0;
66
67 /*
68 * Flag indicating that we just want to change the comment. This can be set
69 * on the command line.
70 */
71 int change_comment = 0;
72
73 int quiet = 0;
74
75 int log_level = SYSLOG_LEVEL_INFO;
76
77 /* Flag indicating that we want to hash a known_hosts file */
78 int hash_hosts = 0;
79 /* Flag indicating that we want lookup a host in known_hosts file */
80 int find_host = 0;
81 /* Flag indicating that we want to delete a host from a known_hosts file */
82 int delete_host = 0;
83
84 /* Flag indicating that we just want to see the key fingerprint */
85 int print_fingerprint = 0;
86 int print_bubblebabble = 0;
87
88 /* The identity file name, given on the command line or entered by the user. */
89 char identity_file[1024];
90 int have_identity = 0;
91
92 /* This is set to the passphrase if given on the command line. */
93 char *identity_passphrase = NULL;
94
95 /* This is set to the new passphrase if given on the command line. */
96 char *identity_new_passphrase = NULL;
97
98 /* This is set to the new comment if given on the command line. */
99 char *identity_comment = NULL;
100
101 /* Dump public key file in format used by real and the original SSH 2 */
102 int convert_to_ssh2 = 0;
103 int convert_from_ssh2 = 0;
104 int print_public = 0;
105 int print_generic = 0;
106
107 char *key_type_name = NULL;
108
109 /* argv0 */
110 extern char *__progname;
111
112 char hostname[MAXHOSTNAMELEN];
113
114 /* moduli.c */
115 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
116 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t);
117
118 static void
119 ask_filename(struct passwd *pw, const char *prompt)
120 {
121 char buf[1024];
122 char *name = NULL;
123
124 if (key_type_name == NULL)
125 name = _PATH_SSH_CLIENT_ID_RSA;
126 else {
127 switch (key_type_from_name(key_type_name)) {
128 case KEY_RSA1:
129 name = _PATH_SSH_CLIENT_IDENTITY;
130 break;
131 case KEY_DSA:
132 name = _PATH_SSH_CLIENT_ID_DSA;
133 break;
134 case KEY_RSA:
135 name = _PATH_SSH_CLIENT_ID_RSA;
136 break;
137 default:
138 fprintf(stderr, "bad key type\n");
139 exit(1);
140 break;
141 }
142 }
143 snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
144 fprintf(stderr, "%s (%s): ", prompt, identity_file);
145 if (fgets(buf, sizeof(buf), stdin) == NULL)
146 exit(1);
147 buf[strcspn(buf, "\n")] = '\0';
148 if (strcmp(buf, "") != 0)
149 strlcpy(identity_file, buf, sizeof(identity_file));
150 have_identity = 1;
151 }
152
153 static Key *
154 load_identity(char *filename)
155 {
156 char *pass;
157 Key *prv;
158
159 prv = key_load_private(filename, "", NULL);
160 if (prv == NULL) {
161 if (identity_passphrase)
162 pass = xstrdup(identity_passphrase);
163 else
164 pass = read_passphrase("Enter passphrase: ",
165 RP_ALLOW_STDIN);
166 prv = key_load_private(filename, pass, NULL);
167 memset(pass, 0, strlen(pass));
168 xfree(pass);
169 }
170 return prv;
171 }
172
173 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
174 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
175 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
176 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
177
178 static void
179 do_convert_to_ssh2(struct passwd *pw)
180 {
181 Key *k;
182 u_int len;
183 u_char *blob;
184 struct stat st;
185
186 if (!have_identity)
187 ask_filename(pw, "Enter file in which the key is");
188 if (stat(identity_file, &st) < 0) {
189 perror(identity_file);
190 exit(1);
191 }
192 if ((k = key_load_public(identity_file, NULL)) == NULL) {
193 if ((k = load_identity(identity_file)) == NULL) {
194 fprintf(stderr, "load failed\n");
195 exit(1);
196 }
197 }
198 if (k->type == KEY_RSA1) {
199 fprintf(stderr, "version 1 keys are not supported\n");
200 exit(1);
201 }
202 if (key_to_blob(k, &blob, &len) <= 0) {
203 fprintf(stderr, "key_to_blob failed\n");
204 exit(1);
205 }
206 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
207 fprintf(stdout,
208 "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n",
209 key_size(k), key_type(k),
210 pw->pw_name, hostname);
211 dump_base64(stdout, blob, len);
212 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
213 key_free(k);
214 xfree(blob);
215 exit(0);
216 }
217
218 static void
219 buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
220 {
221 u_int bignum_bits = buffer_get_int(b);
222 u_int bytes = (bignum_bits + 7) / 8;
223
224 if (buffer_len(b) < bytes)
225 fatal("buffer_get_bignum_bits: input buffer too small: "
226 "need %d have %d", bytes, buffer_len(b));
227 if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL)
228 fatal("buffer_get_bignum_bits: BN_bin2bn failed");
229 buffer_consume(b, bytes);
230 }
231
232 static Key *
233 do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
234 {
235 Buffer b;
236 Key *key = NULL;
237 char *type, *cipher;
238 u_char *sig, data[] = "abcde12345";
239 int magic, rlen, ktype, i1, i2, i3, i4;
240 u_int slen;
241 u_long e;
242
243 buffer_init(&b);
244 buffer_append(&b, blob, blen);
245
246 magic = buffer_get_int(&b);
247 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
248 error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
249 buffer_free(&b);
250 return NULL;
251 }
252 i1 = buffer_get_int(&b);
253 type = buffer_get_string(&b, NULL);
254 cipher = buffer_get_string(&b, NULL);
255 i2 = buffer_get_int(&b);
256 i3 = buffer_get_int(&b);
257 i4 = buffer_get_int(&b);
258 debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
259 if (strcmp(cipher, "none") != 0) {
260 error("unsupported cipher %s", cipher);
261 xfree(cipher);
262 buffer_free(&b);
263 xfree(type);
264 return NULL;
265 }
266 xfree(cipher);
267
268 if (strstr(type, "dsa")) {
269 ktype = KEY_DSA;
270 } else if (strstr(type, "rsa")) {
271 ktype = KEY_RSA;
272 } else {
273 buffer_free(&b);
274 xfree(type);
275 return NULL;
276 }
277 key = key_new_private(ktype);
278 xfree(type);
279
280 switch (key->type) {
281 case KEY_DSA:
282 buffer_get_bignum_bits(&b, key->dsa->p);
283 buffer_get_bignum_bits(&b, key->dsa->g);
284 buffer_get_bignum_bits(&b, key->dsa->q);
285 buffer_get_bignum_bits(&b, key->dsa->pub_key);
286 buffer_get_bignum_bits(&b, key->dsa->priv_key);
287 break;
288 case KEY_RSA:
289 e = buffer_get_char(&b);
290 debug("e %lx", e);
291 if (e < 30) {
292 e <<= 8;
293 e += buffer_get_char(&b);
294 debug("e %lx", e);
295 e <<= 8;
296 e += buffer_get_char(&b);
297 debug("e %lx", e);
298 }
299 if (!BN_set_word(key->rsa->e, e)) {
300 buffer_free(&b);
301 key_free(key);
302 return NULL;
303 }
304 buffer_get_bignum_bits(&b, key->rsa->d);
305 buffer_get_bignum_bits(&b, key->rsa->n);
306 buffer_get_bignum_bits(&b, key->rsa->iqmp);
307 buffer_get_bignum_bits(&b, key->rsa->q);
308 buffer_get_bignum_bits(&b, key->rsa->p);
309 rsa_generate_additional_parameters(key->rsa);
310 break;
311 }
312 rlen = buffer_len(&b);
313 if (rlen != 0)
314 error("do_convert_private_ssh2_from_blob: "
315 "remaining bytes in key blob %d", rlen);
316 buffer_free(&b);
317
318 /* try the key */
319 key_sign(key, &sig, &slen, data, sizeof(data));
320 key_verify(key, sig, slen, data, sizeof(data));
321 xfree(sig);
322 return key;
323 }
324
325 static int
326 get_line(FILE *fp, char *line, size_t len)
327 {
328 int c;
329 size_t pos = 0;
330
331 line[0] = '\0';
332 while ((c = fgetc(fp)) != EOF) {
333 if (pos >= len - 1) {
334 fprintf(stderr, "input line too long.\n");
335 exit(1);
336 }
337 switch (c) {
338 case '\r':
339 c = fgetc(fp);
340 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) {
341 fprintf(stderr, "unget: %s\n", strerror(errno));
342 exit(1);
343 }
344 return pos;
345 case '\n':
346 return pos;
347 }
348 line[pos++] = c;
349 line[pos] = '\0';
350 }
351 /* We reached EOF */
352 return -1;
353 }
354
355 static void
356 do_convert_from_ssh2(struct passwd *pw)
357 {
358 Key *k;
359 int blen;
360 u_int len;
361 char line[1024];
362 u_char blob[8096];
363 char encoded[8096];
364 struct stat st;
365 int escaped = 0, private = 0, ok;
366 FILE *fp;
367
368 if (!have_identity)
369 ask_filename(pw, "Enter file in which the key is");
370 if (stat(identity_file, &st) < 0) {
371 perror(identity_file);
372 exit(1);
373 }
374 fp = fopen(identity_file, "r");
375 if (fp == NULL) {
376 perror(identity_file);
377 exit(1);
378 }
379 encoded[0] = '\0';
380 while ((blen = get_line(fp, line, sizeof(line))) != -1) {
381 if (line[blen - 1] == '\\')
382 escaped++;
383 if (strncmp(line, "----", 4) == 0 ||
384 strstr(line, ": ") != NULL) {
385 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
386 private = 1;
387 if (strstr(line, " END ") != NULL) {
388 break;
389 }
390 /* fprintf(stderr, "ignore: %s", line); */
391 continue;
392 }
393 if (escaped) {
394 escaped--;
395 /* fprintf(stderr, "escaped: %s", line); */
396 continue;
397 }
398 strlcat(encoded, line, sizeof(encoded));
399 }
400 len = strlen(encoded);
401 if (((len % 4) == 3) &&
402 (encoded[len-1] == '=') &&
403 (encoded[len-2] == '=') &&
404 (encoded[len-3] == '='))
405 encoded[len-3] = '\0';
406 blen = uudecode(encoded, blob, sizeof(blob));
407 if (blen < 0) {
408 fprintf(stderr, "uudecode failed.\n");
409 exit(1);
410 }
411 k = private ?
412 do_convert_private_ssh2_from_blob(blob, blen) :
413 key_from_blob(blob, blen);
414 if (k == NULL) {
415 fprintf(stderr, "decode blob failed.\n");
416 exit(1);
417 }
418 ok = private ?
419 (k->type == KEY_DSA ?
420 PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
421 PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
422 key_write(k, stdout);
423 if (!ok) {
424 fprintf(stderr, "key write failed\n");
425 exit(1);
426 }
427 key_free(k);
428 if (!private)
429 fprintf(stdout, "\n");
430 fclose(fp);
431 exit(0);
432 }
433
434 static void
435 do_print_public(struct passwd *pw)
436 {
437 Key *prv;
438 struct stat st;
439
440 if (!have_identity)
441 ask_filename(pw, "Enter file in which the key is");
442 if (stat(identity_file, &st) < 0) {
443 perror(identity_file);
444 exit(1);
445 }
446 prv = load_identity(identity_file);
447 if (prv == NULL) {
448 fprintf(stderr, "load failed\n");
449 exit(1);
450 }
451 if (!key_write(prv, stdout))
452 fprintf(stderr, "key_write failed");
453 key_free(prv);
454 fprintf(stdout, "\n");
455 exit(0);
456 }
457
458 #ifdef SMARTCARD
459 static void
460 do_upload(struct passwd *pw, const char *sc_reader_id)
461 {
462 Key *prv = NULL;
463 struct stat st;
464 int ret;
465
466 if (!have_identity)
467 ask_filename(pw, "Enter file in which the key is");
468 if (stat(identity_file, &st) < 0) {
469 perror(identity_file);
470 exit(1);
471 }
472 prv = load_identity(identity_file);
473 if (prv == NULL) {
474 error("load failed");
475 exit(1);
476 }
477 ret = sc_put_key(prv, sc_reader_id);
478 key_free(prv);
479 if (ret < 0)
480 exit(1);
481 logit("loading key done");
482 exit(0);
483 }
484
485 static void
486 do_download(struct passwd *pw, const char *sc_reader_id)
487 {
488 Key **keys = NULL;
489 int i;
490
491 keys = sc_get_keys(sc_reader_id, NULL);
492 if (keys == NULL)
493 fatal("cannot read public key from smartcard");
494 for (i = 0; keys[i]; i++) {
495 key_write(keys[i], stdout);
496 key_free(keys[i]);
497 fprintf(stdout, "\n");
498 }
499 xfree(keys);
500 exit(0);
501 }
502 #endif /* SMARTCARD */
503
504 static void
505 do_fingerprint(struct passwd *pw)
506 {
507 FILE *f;
508 Key *public;
509 char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra;
510 int i, skip = 0, num = 0, invalid = 1;
511 enum fp_rep rep;
512 enum fp_type fptype;
513 struct stat st;
514
515 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
516 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
517
518 if (!have_identity)
519 ask_filename(pw, "Enter file in which the key is");
520 if (stat(identity_file, &st) < 0) {
521 perror(identity_file);
522 exit(1);
523 }
524 public = key_load_public(identity_file, &comment);
525 if (public != NULL) {
526 fp = key_fingerprint(public, fptype, rep);
527 ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
528 printf("%u %s %s (%s)\n", key_size(public), fp, comment,
529 key_type(public));
530 if (log_level >= SYSLOG_LEVEL_VERBOSE)
531 printf("%s\n", ra);
532 key_free(public);
533 xfree(comment);
534 xfree(ra);
535 xfree(fp);
536 exit(0);
537 }
538 if (comment) {
539 xfree(comment);
540 comment = NULL;
541 }
542
543 f = fopen(identity_file, "r");
544 if (f != NULL) {
545 while (fgets(line, sizeof(line), f)) {
546 if ((cp = strchr(line, '\n')) == NULL) {
547 error("line %d too long: %.40s...",
548 num + 1, line);
549 skip = 1;
550 continue;
551 }
552 num++;
553 if (skip) {
554 skip = 0;
555 continue;
556 }
557 *cp = '\0';
558
559 /* Skip leading whitespace, empty and comment lines. */
560 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
561 ;
562 if (!*cp || *cp == '\n' || *cp == '#')
563 continue;
564 i = strtol(cp, &ep, 10);
565 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
566 int quoted = 0;
567 comment = cp;
568 for (; *cp && (quoted || (*cp != ' ' &&
569 *cp != '\t')); cp++) {
570 if (*cp == '\\' && cp[1] == '"')
571 cp++; /* Skip both */
572 else if (*cp == '"')
573 quoted = !quoted;
574 }
575 if (!*cp)
576 continue;
577 *cp++ = '\0';
578 }
579 ep = cp;
580 public = key_new(KEY_RSA1);
581 if (key_read(public, &cp) != 1) {
582 cp = ep;
583 key_free(public);
584 public = key_new(KEY_UNSPEC);
585 if (key_read(public, &cp) != 1) {
586 key_free(public);
587 continue;
588 }
589 }
590 comment = *cp ? cp : comment;
591 fp = key_fingerprint(public, fptype, rep);
592 ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
593 printf("%u %s %s (%s)\n", key_size(public), fp,
594 comment ? comment : "no comment", key_type(public));
595 if (log_level >= SYSLOG_LEVEL_VERBOSE)
596 printf("%s\n", ra);
597 xfree(ra);
598 xfree(fp);
599 key_free(public);
600 invalid = 0;
601 }
602 fclose(f);
603 }
604 if (invalid) {
605 printf("%s is not a public key file.\n", identity_file);
606 exit(1);
607 }
608 exit(0);
609 }
610
611 static void
612 print_host(FILE *f, const char *name, Key *public, int hash)
613 {
614 if (print_fingerprint) {
615 enum fp_rep rep;
616 enum fp_type fptype;
617 char *fp, *ra;
618
619 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
620 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
621 fp = key_fingerprint(public, fptype, rep);
622 ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
623 printf("%u %s %s (%s)\n", key_size(public), fp, name,
624 key_type(public));
625 if (log_level >= SYSLOG_LEVEL_VERBOSE)
626 printf("%s\n", ra);
627 xfree(ra);
628 xfree(fp);
629 } else {
630 if (hash && (name = host_hash(name, NULL, 0)) == NULL)
631 fatal("hash_host failed");
632 fprintf(f, "%s ", name);
633 if (!key_write(public, f))
634 fatal("key_write failed");
635 fprintf(f, "\n");
636 }
637 }
638
639 static void
640 do_known_hosts(struct passwd *pw, const char *name)
641 {
642 FILE *in, *out = stdout;
643 Key *public;
644 char *cp, *cp2, *kp, *kp2;
645 char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN];
646 int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0;
647
648 if (!have_identity) {
649 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
650 if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
651 sizeof(identity_file))
652 fatal("Specified known hosts path too long");
653 xfree(cp);
654 have_identity = 1;
655 }
656 if ((in = fopen(identity_file, "r")) == NULL)
657 fatal("fopen: %s", strerror(errno));
658
659 /*
660 * Find hosts goes to stdout, hash and deletions happen in-place
661 * A corner case is ssh-keygen -HF foo, which should go to stdout
662 */
663 if (!find_host && (hash_hosts || delete_host)) {
664 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
665 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
666 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
667 strlcat(old, ".old", sizeof(old)) >= sizeof(old))
668 fatal("known_hosts path too long");
669 umask(077);
670 if ((c = mkstemp(tmp)) == -1)
671 fatal("mkstemp: %s", strerror(errno));
672 if ((out = fdopen(c, "w")) == NULL) {
673 c = errno;
674 unlink(tmp);
675 fatal("fdopen: %s", strerror(c));
676 }
677 inplace = 1;
678 }
679
680 while (fgets(line, sizeof(line), in)) {
681 if ((cp = strchr(line, '\n')) == NULL) {
682 error("line %d too long: %.40s...", num + 1, line);
683 skip = 1;
684 invalid = 1;
685 continue;
686 }
687 num++;
688 if (skip) {
689 skip = 0;
690 continue;
691 }
692 *cp = '\0';
693
694 /* Skip leading whitespace, empty and comment lines. */
695 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
696 ;
697 if (!*cp || *cp == '\n' || *cp == '#') {
698 if (inplace)
699 fprintf(out, "%s\n", cp);
700 continue;
701 }
702 /* Find the end of the host name portion. */
703 for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++)
704 ;
705 if (*kp == '\0' || *(kp + 1) == '\0') {
706 error("line %d missing key: %.40s...",
707 num, line);
708 invalid = 1;
709 continue;
710 }
711 *kp++ = '\0';
712 kp2 = kp;
713
714 public = key_new(KEY_RSA1);
715 if (key_read(public, &kp) != 1) {
716 kp = kp2;
717 key_free(public);
718 public = key_new(KEY_UNSPEC);
719 if (key_read(public, &kp) != 1) {
720 error("line %d invalid key: %.40s...",
721 num, line);
722 key_free(public);
723 invalid = 1;
724 continue;
725 }
726 }
727
728 if (*cp == HASH_DELIM) {
729 if (find_host || delete_host) {
730 cp2 = host_hash(name, cp, strlen(cp));
731 if (cp2 == NULL) {
732 error("line %d: invalid hashed "
733 "name: %.64s...", num, line);
734 invalid = 1;
735 continue;
736 }
737 c = (strcmp(cp2, cp) == 0);
738 if (find_host && c) {
739 printf("# Host %s found: "
740 "line %d type %s\n", name,
741 num, key_type(public));
742 print_host(out, cp, public, 0);
743 }
744 if (delete_host && !c)
745 print_host(out, cp, public, 0);
746 } else if (hash_hosts)
747 print_host(out, cp, public, 0);
748 } else {
749 if (find_host || delete_host) {
750 c = (match_hostname(name, cp,
751 strlen(cp)) == 1);
752 if (find_host && c) {
753 printf("# Host %s found: "
754 "line %d type %s\n", name,
755 num, key_type(public));
756 print_host(out, name, public,
757 hash_hosts);
758 }
759 if (delete_host && !c)
760 print_host(out, cp, public, 0);
761 } else if (hash_hosts) {
762 for (cp2 = strsep(&cp, ",");
763 cp2 != NULL && *cp2 != '\0';
764 cp2 = strsep(&cp, ",")) {
765 if (strcspn(cp2, "*?!") != strlen(cp2))
766 fprintf(stderr, "Warning: "
767 "ignoring host name with "
768 "metacharacters: %.64s\n",
769 cp2);
770 else
771 print_host(out, cp2, public, 1);
772 }
773 has_unhashed = 1;
774 }
775 }
776 key_free(public);
777 }
778 fclose(in);
779
780 if (invalid) {
781 fprintf(stderr, "%s is not a valid known_hosts file.\n",
782 identity_file);
783 if (inplace) {
784 fprintf(stderr, "Not replacing existing known_hosts "
785 "file because of errors\n");
786 fclose(out);
787 unlink(tmp);
788 }
789 exit(1);
790 }
791
792 if (inplace) {
793 fclose(out);
794
795 /* Backup existing file */
796 if (unlink(old) == -1 && errno != ENOENT)
797 fatal("unlink %.100s: %s", old, strerror(errno));
798 if (link(identity_file, old) == -1)
799 fatal("link %.100s to %.100s: %s", identity_file, old,
800 strerror(errno));
801 /* Move new one into place */
802 if (rename(tmp, identity_file) == -1) {
803 error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
804 strerror(errno));
805 unlink(tmp);
806 unlink(old);
807 exit(1);
808 }
809
810 fprintf(stderr, "%s updated.\n", identity_file);
811 fprintf(stderr, "Original contents retained as %s\n", old);
812 if (has_unhashed) {
813 fprintf(stderr, "WARNING: %s contains unhashed "
814 "entries\n", old);
815 fprintf(stderr, "Delete this file to ensure privacy "
816 "of hostnames\n");
817 }
818 }
819
820 exit(0);
821 }
822
823 /*
824 * Perform changing a passphrase. The argument is the passwd structure
825 * for the current user.
826 */
827 static void
828 do_change_passphrase(struct passwd *pw)
829 {
830 char *comment;
831 char *old_passphrase, *passphrase1, *passphrase2;
832 struct stat st;
833 Key *private;
834
835 if (!have_identity)
836 ask_filename(pw, "Enter file in which the key is");
837 if (stat(identity_file, &st) < 0) {
838 perror(identity_file);
839 exit(1);
840 }
841 /* Try to load the file with empty passphrase. */
842 private = key_load_private(identity_file, "", &comment);
843 if (private == NULL) {
844 if (identity_passphrase)
845 old_passphrase = xstrdup(identity_passphrase);
846 else
847 old_passphrase =
848 read_passphrase("Enter old passphrase: ",
849 RP_ALLOW_STDIN);
850 private = key_load_private(identity_file, old_passphrase,
851 &comment);
852 memset(old_passphrase, 0, strlen(old_passphrase));
853 xfree(old_passphrase);
854 if (private == NULL) {
855 printf("Bad passphrase.\n");
856 exit(1);
857 }
858 }
859 printf("Key has comment '%s'\n", comment);
860
861 /* Ask the new passphrase (twice). */
862 if (identity_new_passphrase) {
863 passphrase1 = xstrdup(identity_new_passphrase);
864 passphrase2 = NULL;
865 } else {
866 passphrase1 =
867 read_passphrase("Enter new passphrase (empty for no "
868 "passphrase): ", RP_ALLOW_STDIN);
869 passphrase2 = read_passphrase("Enter same passphrase again: ",
870 RP_ALLOW_STDIN);
871
872 /* Verify that they are the same. */
873 if (strcmp(passphrase1, passphrase2) != 0) {
874 memset(passphrase1, 0, strlen(passphrase1));
875 memset(passphrase2, 0, strlen(passphrase2));
876 xfree(passphrase1);
877 xfree(passphrase2);
878 printf("Pass phrases do not match. Try again.\n");
879 exit(1);
880 }
881 /* Destroy the other copy. */
882 memset(passphrase2, 0, strlen(passphrase2));
883 xfree(passphrase2);
884 }
885
886 /* Save the file using the new passphrase. */
887 if (!key_save_private(private, identity_file, passphrase1, comment)) {
888 printf("Saving the key failed: %s.\n", identity_file);
889 memset(passphrase1, 0, strlen(passphrase1));
890 xfree(passphrase1);
891 key_free(private);
892 xfree(comment);
893 exit(1);
894 }
895 /* Destroy the passphrase and the copy of the key in memory. */
896 memset(passphrase1, 0, strlen(passphrase1));
897 xfree(passphrase1);
898 key_free(private); /* Destroys contents */
899 xfree(comment);
900
901 printf("Your identification has been saved with the new passphrase.\n");
902 exit(0);
903 }
904
905 /*
906 * Print the SSHFP RR.
907 */
908 static int
909 do_print_resource_record(struct passwd *pw, char *fname, char *hname)
910 {
911 Key *public;
912 char *comment = NULL;
913 struct stat st;
914
915 if (fname == NULL)
916 ask_filename(pw, "Enter file in which the key is");
917 if (stat(fname, &st) < 0) {
918 if (errno == ENOENT)
919 return 0;
920 perror(fname);
921 exit(1);
922 }
923 public = key_load_public(fname, &comment);
924 if (public != NULL) {
925 export_dns_rr(hname, public, stdout, print_generic);
926 key_free(public);
927 xfree(comment);
928 return 1;
929 }
930 if (comment)
931 xfree(comment);
932
933 printf("failed to read v2 public key from %s.\n", fname);
934 exit(1);
935 }
936
937 /*
938 * Change the comment of a private key file.
939 */
940 static void
941 do_change_comment(struct passwd *pw)
942 {
943 char new_comment[1024], *comment, *passphrase;
944 Key *private;
945 Key *public;
946 struct stat st;
947 FILE *f;
948 int fd;
949
950 if (!have_identity)
951 ask_filename(pw, "Enter file in which the key is");
952 if (stat(identity_file, &st) < 0) {
953 perror(identity_file);
954 exit(1);
955 }
956 private = key_load_private(identity_file, "", &comment);
957 if (private == NULL) {
958 if (identity_passphrase)
959 passphrase = xstrdup(identity_passphrase);
960 else if (identity_new_passphrase)
961 passphrase = xstrdup(identity_new_passphrase);
962 else
963 passphrase = read_passphrase("Enter passphrase: ",
964 RP_ALLOW_STDIN);
965 /* Try to load using the passphrase. */
966 private = key_load_private(identity_file, passphrase, &comment);
967 if (private == NULL) {
968 memset(passphrase, 0, strlen(passphrase));
969 xfree(passphrase);
970 printf("Bad passphrase.\n");
971 exit(1);
972 }
973 } else {
974 passphrase = xstrdup("");
975 }
976 if (private->type != KEY_RSA1) {
977 fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
978 key_free(private);
979 exit(1);
980 }
981 printf("Key now has comment '%s'\n", comment);
982
983 if (identity_comment) {
984 strlcpy(new_comment, identity_comment, sizeof(new_comment));
985 } else {
986 printf("Enter new comment: ");
987 fflush(stdout);
988 if (!fgets(new_comment, sizeof(new_comment), stdin)) {
989 memset(passphrase, 0, strlen(passphrase));
990 key_free(private);
991 exit(1);
992 }
993 new_comment[strcspn(new_comment, "\n")] = '\0';
994 }
995
996 /* Save the file using the new passphrase. */
997 if (!key_save_private(private, identity_file, passphrase, new_comment)) {
998 printf("Saving the key failed: %s.\n", identity_file);
999 memset(passphrase, 0, strlen(passphrase));
1000 xfree(passphrase);
1001 key_free(private);
1002 xfree(comment);
1003 exit(1);
1004 }
1005 memset(passphrase, 0, strlen(passphrase));
1006 xfree(passphrase);
1007 public = key_from_private(private);
1008 key_free(private);
1009
1010 strlcat(identity_file, ".pub", sizeof(identity_file));
1011 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1012 if (fd == -1) {
1013 printf("Could not save your public key in %s\n", identity_file);
1014 exit(1);
1015 }
1016 f = fdopen(fd, "w");
1017 if (f == NULL) {
1018 printf("fdopen %s failed\n", identity_file);
1019 exit(1);
1020 }
1021 if (!key_write(public, f))
1022 fprintf(stderr, "write key failed\n");
1023 key_free(public);
1024 fprintf(f, " %s\n", new_comment);
1025 fclose(f);
1026
1027 xfree(comment);
1028
1029 printf("The comment in your key file has been changed.\n");
1030 exit(0);
1031 }
1032
1033 static void
1034 usage(void)
1035 {
1036 fprintf(stderr, "usage: %s [options]\n", __progname);
1037 fprintf(stderr, "Options:\n");
1038 fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n");
1039 fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
1040 fprintf(stderr, " -b bits Number of bits in the key to create.\n");
1041 fprintf(stderr, " -C comment Provide new comment.\n");
1042 fprintf(stderr, " -c Change comment in private and public key files.\n");
1043 #ifdef SMARTCARD
1044 fprintf(stderr, " -D reader Download public key from smartcard.\n");
1045 #endif /* SMARTCARD */
1046 fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n");
1047 fprintf(stderr, " -F hostname Find hostname in known hosts file.\n");
1048 fprintf(stderr, " -f filename Filename of the key file.\n");
1049 fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n");
1050 fprintf(stderr, " -g Use generic DNS resource record format.\n");
1051 fprintf(stderr, " -H Hash names in known_hosts file.\n");
1052 fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n");
1053 fprintf(stderr, " -l Show fingerprint of key file.\n");
1054 fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n");
1055 fprintf(stderr, " -N phrase Provide new passphrase.\n");
1056 fprintf(stderr, " -P phrase Provide old passphrase.\n");
1057 fprintf(stderr, " -p Change passphrase of private key file.\n");
1058 fprintf(stderr, " -q Quiet.\n");
1059 fprintf(stderr, " -R hostname Remove host from known_hosts file.\n");
1060 fprintf(stderr, " -r hostname Print DNS resource record.\n");
1061 fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n");
1062 fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n");
1063 fprintf(stderr, " -t type Specify type of key to create.\n");
1064 #ifdef SMARTCARD
1065 fprintf(stderr, " -U reader Upload private key to smartcard.\n");
1066 #endif /* SMARTCARD */
1067 fprintf(stderr, " -v Verbose.\n");
1068 fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n");
1069 fprintf(stderr, " -y Read private key file and print public key.\n");
1070
1071 exit(1);
1072 }
1073
1074 /*
1075 * Main program for key management.
1076 */
1077 int
1078 main(int argc, char **argv)
1079 {
1080 char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1081 char out_file[MAXPATHLEN], *reader_id = NULL;
1082 char *rr_hostname = NULL;
1083 Key *private, *public;
1084 struct passwd *pw;
1085 struct stat st;
1086 int opt, type, fd, download = 0;
1087 u_int32_t memory = 0, generator_wanted = 0, trials = 100;
1088 int do_gen_candidates = 0, do_screen_candidates = 0;
1089 BIGNUM *start = NULL;
1090 FILE *f;
1091 const char *errstr;
1092
1093 extern int optind;
1094 extern char *optarg;
1095
1096 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
1097 sanitise_stdfd();
1098
1099 __progname = ssh_get_progname(argv[0]);
1100
1101 SSLeay_add_all_algorithms();
1102 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1103
1104 init_rng();
1105 seed_rng();
1106
1107 /* we need this for the home * directory. */
1108 pw = getpwuid(getuid());
1109 if (!pw) {
1110 printf("You don't exist, go away!\n");
1111 exit(1);
1112 }
1113 if (gethostname(hostname, sizeof(hostname)) < 0) {
1114 perror("gethostname");
1115 exit(1);
1116 }
1117
1118 while ((opt = getopt(argc, argv,
1119 "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) {
1120 switch (opt) {
1121 case 'b':
1122 bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr);
1123 if (errstr)
1124 fatal("Bits has bad value %s (%s)",
1125 optarg, errstr);
1126 break;
1127 case 'F':
1128 find_host = 1;
1129 rr_hostname = optarg;
1130 break;
1131 case 'H':
1132 hash_hosts = 1;
1133 break;
1134 case 'R':
1135 delete_host = 1;
1136 rr_hostname = optarg;
1137 break;
1138 case 'l':
1139 print_fingerprint = 1;
1140 break;
1141 case 'B':
1142 print_bubblebabble = 1;
1143 break;
1144 case 'p':
1145 change_passphrase = 1;
1146 break;
1147 case 'c':
1148 change_comment = 1;
1149 break;
1150 case 'f':
1151 if (strlcpy(identity_file, optarg, sizeof(identity_file)) >=
1152 sizeof(identity_file))
1153 fatal("Identity filename too long");
1154 have_identity = 1;
1155 break;
1156 case 'g':
1157 print_generic = 1;
1158 break;
1159 case 'P':
1160 identity_passphrase = optarg;
1161 break;
1162 case 'N':
1163 identity_new_passphrase = optarg;
1164 break;
1165 case 'C':
1166 identity_comment = optarg;
1167 break;
1168 case 'q':
1169 quiet = 1;
1170 break;
1171 case 'e':
1172 case 'x':
1173 /* export key */
1174 convert_to_ssh2 = 1;
1175 break;
1176 case 'i':
1177 case 'X':
1178 /* import key */
1179 convert_from_ssh2 = 1;
1180 break;
1181 case 'y':
1182 print_public = 1;
1183 break;
1184 case 'd':
1185 key_type_name = "dsa";
1186 break;
1187 case 't':
1188 key_type_name = optarg;
1189 break;
1190 case 'D':
1191 download = 1;
1192 /*FALLTHROUGH*/
1193 case 'U':
1194 reader_id = optarg;
1195 break;
1196 case 'v':
1197 if (log_level == SYSLOG_LEVEL_INFO)
1198 log_level = SYSLOG_LEVEL_DEBUG1;
1199 else {
1200 if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1201 log_level < SYSLOG_LEVEL_DEBUG3)
1202 log_level++;
1203 }
1204 break;
1205 case 'r':
1206 rr_hostname = optarg;
1207 break;
1208 case 'W':
1209 generator_wanted = (u_int32_t)strtonum(optarg, 1,
1210 UINT_MAX, &errstr);
1211 if (errstr)
1212 fatal("Desired generator has bad value: %s (%s)",
1213 optarg, errstr);
1214 break;
1215 case 'a':
1216 trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
1217 if (errstr)
1218 fatal("Invalid number of trials: %s (%s)",
1219 optarg, errstr);
1220 break;
1221 case 'M':
1222 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
1223 if (errstr) {
1224 fatal("Memory limit is %s: %s", errstr, optarg);
1225 }
1226 break;
1227 case 'G':
1228 do_gen_candidates = 1;
1229 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1230 sizeof(out_file))
1231 fatal("Output filename too long");
1232 break;
1233 case 'T':
1234 do_screen_candidates = 1;
1235 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1236 sizeof(out_file))
1237 fatal("Output filename too long");
1238 break;
1239 case 'S':
1240 /* XXX - also compare length against bits */
1241 if (BN_hex2bn(&start, optarg) == 0)
1242 fatal("Invalid start point.");
1243 break;
1244 case '?':
1245 default:
1246 usage();
1247 }
1248 }
1249
1250 /* reinit */
1251 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
1252
1253 if (optind < argc) {
1254 printf("Too many arguments.\n");
1255 usage();
1256 }
1257 if (change_passphrase && change_comment) {
1258 printf("Can only have one of -p and -c.\n");
1259 usage();
1260 }
1261 if (print_fingerprint && (delete_host || hash_hosts)) {
1262 printf("Cannot use -l with -D or -R.\n");
1263 usage();
1264 }
1265 if (delete_host || hash_hosts || find_host)
1266 do_known_hosts(pw, rr_hostname);
1267 if (print_fingerprint || print_bubblebabble)
1268 do_fingerprint(pw);
1269 if (change_passphrase)
1270 do_change_passphrase(pw);
1271 if (change_comment)
1272 do_change_comment(pw);
1273 if (convert_to_ssh2)
1274 do_convert_to_ssh2(pw);
1275 if (convert_from_ssh2)
1276 do_convert_from_ssh2(pw);
1277 if (print_public)
1278 do_print_public(pw);
1279 if (rr_hostname != NULL) {
1280 unsigned int n = 0;
1281
1282 if (have_identity) {
1283 n = do_print_resource_record(pw,
1284 identity_file, rr_hostname);
1285 if (n == 0) {
1286 perror(identity_file);
1287 exit(1);
1288 }
1289 exit(0);
1290 } else {
1291
1292 n += do_print_resource_record(pw,
1293 _PATH_HOST_RSA_KEY_FILE, rr_hostname);
1294 n += do_print_resource_record(pw,
1295 _PATH_HOST_DSA_KEY_FILE, rr_hostname);
1296
1297 if (n == 0)
1298 fatal("no keys found.");
1299 exit(0);
1300 }
1301 }
1302 if (reader_id != NULL) {
1303 #ifdef SMARTCARD
1304 if (download)
1305 do_download(pw, reader_id);
1306 else
1307 do_upload(pw, reader_id);
1308 #else /* SMARTCARD */
1309 fatal("no support for smartcards.");
1310 #endif /* SMARTCARD */
1311 }
1312
1313 if (do_gen_candidates) {
1314 FILE *out = fopen(out_file, "w");
1315
1316 if (out == NULL) {
1317 error("Couldn't open modulus candidate file \"%s\": %s",
1318 out_file, strerror(errno));
1319 return (1);
1320 }
1321 if (bits == 0)
1322 bits = DEFAULT_BITS;
1323 if (gen_candidates(out, memory, bits, start) != 0)
1324 fatal("modulus candidate generation failed");
1325
1326 return (0);
1327 }
1328
1329 if (do_screen_candidates) {
1330 FILE *in;
1331 FILE *out = fopen(out_file, "w");
1332
1333 if (have_identity && strcmp(identity_file, "-") != 0) {
1334 if ((in = fopen(identity_file, "r")) == NULL) {
1335 fatal("Couldn't open modulus candidate "
1336 "file \"%s\": %s", identity_file,
1337 strerror(errno));
1338 }
1339 } else
1340 in = stdin;
1341
1342 if (out == NULL) {
1343 fatal("Couldn't open moduli file \"%s\": %s",
1344 out_file, strerror(errno));
1345 }
1346 if (prime_test(in, out, trials, generator_wanted) != 0)
1347 fatal("modulus screening failed");
1348 return (0);
1349 }
1350
1351 arc4random_stir();
1352
1353 if (key_type_name == NULL)
1354 key_type_name = "rsa";
1355
1356 type = key_type_from_name(key_type_name);
1357 if (type == KEY_UNSPEC) {
1358 fprintf(stderr, "unknown key type %s\n", key_type_name);
1359 exit(1);
1360 }
1361 if (bits == 0)
1362 bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS;
1363 if (type == KEY_DSA && bits != 1024)
1364 fatal("DSA keys must be 1024 bits");
1365 if (!quiet)
1366 printf("Generating public/private %s key pair.\n", key_type_name);
1367 private = key_generate(type, bits);
1368 if (private == NULL) {
1369 fprintf(stderr, "key_generate failed\n");
1370 exit(1);
1371 }
1372 public = key_from_private(private);
1373
1374 if (!have_identity)
1375 ask_filename(pw, "Enter file in which to save the key");
1376
1377 /* Create ~/.ssh directory if it doesn't already exist. */
1378 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
1379 if (strstr(identity_file, dotsshdir) != NULL &&
1380 stat(dotsshdir, &st) < 0) {
1381 if (mkdir(dotsshdir, 0700) < 0)
1382 error("Could not create directory '%s'.", dotsshdir);
1383 else if (!quiet)
1384 printf("Created directory '%s'.\n", dotsshdir);
1385 }
1386 /* If the file already exists, ask the user to confirm. */
1387 if (stat(identity_file, &st) >= 0) {
1388 char yesno[3];
1389 printf("%s already exists.\n", identity_file);
1390 printf("Overwrite (y/n)? ");
1391 fflush(stdout);
1392 if (fgets(yesno, sizeof(yesno), stdin) == NULL)
1393 exit(1);
1394 if (yesno[0] != 'y' && yesno[0] != 'Y')
1395 exit(1);
1396 }
1397 /* Ask for a passphrase (twice). */
1398 if (identity_passphrase)
1399 passphrase1 = xstrdup(identity_passphrase);
1400 else if (identity_new_passphrase)
1401 passphrase1 = xstrdup(identity_new_passphrase);
1402 else {
1403 passphrase_again:
1404 passphrase1 =
1405 read_passphrase("Enter passphrase (empty for no "
1406 "passphrase): ", RP_ALLOW_STDIN);
1407 passphrase2 = read_passphrase("Enter same passphrase again: ",
1408 RP_ALLOW_STDIN);
1409 if (strcmp(passphrase1, passphrase2) != 0) {
1410 /*
1411 * The passphrases do not match. Clear them and
1412 * retry.
1413 */
1414 memset(passphrase1, 0, strlen(passphrase1));
1415 memset(passphrase2, 0, strlen(passphrase2));
1416 xfree(passphrase1);
1417 xfree(passphrase2);
1418 printf("Passphrases do not match. Try again.\n");
1419 goto passphrase_again;
1420 }
1421 /* Clear the other copy of the passphrase. */
1422 memset(passphrase2, 0, strlen(passphrase2));
1423 xfree(passphrase2);
1424 }
1425
1426 if (identity_comment) {
1427 strlcpy(comment, identity_comment, sizeof(comment));
1428 } else {
1429 /* Create default comment field for the passphrase. */
1430 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
1431 }
1432
1433 /* Save the key with the given passphrase and comment. */
1434 if (!key_save_private(private, identity_file, passphrase1, comment)) {
1435 printf("Saving the key failed: %s.\n", identity_file);
1436 memset(passphrase1, 0, strlen(passphrase1));
1437 xfree(passphrase1);
1438 exit(1);
1439 }
1440 /* Clear the passphrase. */
1441 memset(passphrase1, 0, strlen(passphrase1));
1442 xfree(passphrase1);
1443
1444 /* Clear the private key and the random number generator. */
1445 key_free(private);
1446 arc4random_stir();
1447
1448 if (!quiet)
1449 printf("Your identification has been saved in %s.\n", identity_file);
1450
1451 strlcat(identity_file, ".pub", sizeof(identity_file));
1452 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1453 if (fd == -1) {
1454 printf("Could not save your public key in %s\n", identity_file);
1455 exit(1);
1456 }
1457 f = fdopen(fd, "w");
1458 if (f == NULL) {
1459 printf("fdopen %s failed\n", identity_file);
1460 exit(1);
1461 }
1462 if (!key_write(public, f))
1463 fprintf(stderr, "write key failed\n");
1464 fprintf(f, " %s\n", comment);
1465 fclose(f);
1466
1467 if (!quiet) {
1468 char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1469 char *ra = key_fingerprint(public, SSH_FP_MD5,
1470 SSH_FP_RANDOMART);
1471 printf("Your public key has been saved in %s.\n",
1472 identity_file);
1473 printf("The key fingerprint is:\n");
1474 printf("%s %s\n", fp, comment);
1475 printf("The key's randomart image is:\n");
1476 printf("%s\n", ra);
1477 xfree(ra);
1478 xfree(fp);
1479 }
1480
1481 key_free(public);
1482 exit(0);
1483 }
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