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[dragonfly.git] / crypto / openssh / ssh-keygen.c
blob4b6218b10f88bc9c4ed8dd51c74d7a06a45cd289
1 /* $OpenBSD: ssh-keygen.c,v 1.210 2011/04/18 00:46:05 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 #include "ssh2.h"
52 #include "ssh-pkcs11.h"
53
54 /* Number of bits in the RSA/DSA key. This value can be set on the command line. */
55 #define DEFAULT_BITS 2048
56 #define DEFAULT_BITS_DSA 1024
57 #define DEFAULT_BITS_ECDSA 256
58 u_int32_t bits = 0;
59
60 /*
61 * Flag indicating that we just want to change the passphrase. This can be
62 * set on the command line.
63 */
64 int change_passphrase = 0;
65
66 /*
67 * Flag indicating that we just want to change the comment. This can be set
68 * on the command line.
69 */
70 int change_comment = 0;
71
72 int quiet = 0;
73
74 int log_level = SYSLOG_LEVEL_INFO;
75
76 /* Flag indicating that we want to hash a known_hosts file */
77 int hash_hosts = 0;
78 /* Flag indicating that we want lookup a host in known_hosts file */
79 int find_host = 0;
80 /* Flag indicating that we want to delete a host from a known_hosts file */
81 int delete_host = 0;
82
83 /* Flag indicating that we want to show the contents of a certificate */
84 int show_cert = 0;
85
86 /* Flag indicating that we just want to see the key fingerprint */
87 int print_fingerprint = 0;
88 int print_bubblebabble = 0;
89
90 /* The identity file name, given on the command line or entered by the user. */
91 char identity_file[1024];
92 int have_identity = 0;
93
94 /* This is set to the passphrase if given on the command line. */
95 char *identity_passphrase = NULL;
96
97 /* This is set to the new passphrase if given on the command line. */
98 char *identity_new_passphrase = NULL;
99
100 /* This is set to the new comment if given on the command line. */
101 char *identity_comment = NULL;
102
103 /* Path to CA key when certifying keys. */
104 char *ca_key_path = NULL;
105
106 /* Certificate serial number */
107 long long cert_serial = 0;
108
109 /* Key type when certifying */
110 u_int cert_key_type = SSH2_CERT_TYPE_USER;
111
112 /* "key ID" of signed key */
113 char *cert_key_id = NULL;
114
115 /* Comma-separated list of principal names for certifying keys */
116 char *cert_principals = NULL;
117
118 /* Validity period for certificates */
119 u_int64_t cert_valid_from = 0;
120 u_int64_t cert_valid_to = ~0ULL;
121
122 /* Certificate options */
123 #define CERTOPT_X_FWD (1)
124 #define CERTOPT_AGENT_FWD (1<<1)
125 #define CERTOPT_PORT_FWD (1<<2)
126 #define CERTOPT_PTY (1<<3)
127 #define CERTOPT_USER_RC (1<<4)
128 #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
129 CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
130 u_int32_t certflags_flags = CERTOPT_DEFAULT;
131 char *certflags_command = NULL;
132 char *certflags_src_addr = NULL;
133
134 /* Conversion to/from various formats */
135 int convert_to = 0;
136 int convert_from = 0;
137 enum {
138 FMT_RFC4716,
139 FMT_PKCS8,
140 FMT_PEM
141 } convert_format = FMT_RFC4716;
142 int print_public = 0;
143 int print_generic = 0;
144
145 char *key_type_name = NULL;
146
147 /* Load key from this PKCS#11 provider */
148 char *pkcs11provider = NULL;
149
150 /* argv0 */
151 extern char *__progname;
152
153 char hostname[MAXHOSTNAMELEN];
154
155 /* moduli.c */
156 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
157 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t);
158
159 static void
160 type_bits_valid(int type, u_int32_t *bitsp)
161 {
162 u_int maxbits;
163
164 if (type == KEY_UNSPEC) {
165 fprintf(stderr, "unknown key type %s\n", key_type_name);
166 exit(1);
167 }
168 if (*bitsp == 0) {
169 if (type == KEY_DSA)
170 *bitsp = DEFAULT_BITS_DSA;
171 else if (type == KEY_ECDSA)
172 *bitsp = DEFAULT_BITS_ECDSA;
173 else
174 *bitsp = DEFAULT_BITS;
175 }
176 maxbits = (type == KEY_DSA) ?
177 OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS;
178 if (*bitsp > maxbits) {
179 fprintf(stderr, "key bits exceeds maximum %d\n", maxbits);
180 exit(1);
181 }
182 if (type == KEY_DSA && *bitsp != 1024)
183 fatal("DSA keys must be 1024 bits");
184 else if (type != KEY_ECDSA && *bitsp < 768)
185 fatal("Key must at least be 768 bits");
186 else if (type == KEY_ECDSA && key_ecdsa_bits_to_nid(*bitsp) == -1)
187 fatal("Invalid ECDSA key length - valid lengths are "
188 "256, 384 or 521 bits");
189 }
190
191 static void
192 ask_filename(struct passwd *pw, const char *prompt)
193 {
194 char buf[1024];
195 char *name = NULL;
196
197 if (key_type_name == NULL)
198 name = _PATH_SSH_CLIENT_ID_RSA;
199 else {
200 switch (key_type_from_name(key_type_name)) {
201 case KEY_RSA1:
202 name = _PATH_SSH_CLIENT_IDENTITY;
203 break;
204 case KEY_DSA_CERT:
205 case KEY_DSA_CERT_V00:
206 case KEY_DSA:
207 name = _PATH_SSH_CLIENT_ID_DSA;
208 break;
209 #ifdef OPENSSL_HAS_ECC
210 case KEY_ECDSA_CERT:
211 case KEY_ECDSA:
212 name = _PATH_SSH_CLIENT_ID_ECDSA;
213 break;
214 #endif
215 case KEY_RSA_CERT:
216 case KEY_RSA_CERT_V00:
217 case KEY_RSA:
218 name = _PATH_SSH_CLIENT_ID_RSA;
219 break;
220 default:
221 fprintf(stderr, "bad key type\n");
222 exit(1);
223 break;
224 }
225 }
226 snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
227 fprintf(stderr, "%s (%s): ", prompt, identity_file);
228 if (fgets(buf, sizeof(buf), stdin) == NULL)
229 exit(1);
230 buf[strcspn(buf, "\n")] = '\0';
231 if (strcmp(buf, "") != 0)
232 strlcpy(identity_file, buf, sizeof(identity_file));
233 have_identity = 1;
234 }
235
236 static Key *
237 load_identity(char *filename)
238 {
239 char *pass;
240 Key *prv;
241
242 prv = key_load_private(filename, "", NULL);
243 if (prv == NULL) {
244 if (identity_passphrase)
245 pass = xstrdup(identity_passphrase);
246 else
247 pass = read_passphrase("Enter passphrase: ",
248 RP_ALLOW_STDIN);
249 prv = key_load_private(filename, pass, NULL);
250 memset(pass, 0, strlen(pass));
251 xfree(pass);
252 }
253 return prv;
254 }
255
256 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
257 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
258 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
259 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
260
261 static void
262 do_convert_to_ssh2(struct passwd *pw, Key *k)
263 {
264 u_int len;
265 u_char *blob;
266 char comment[61];
267
268 if (key_to_blob(k, &blob, &len) <= 0) {
269 fprintf(stderr, "key_to_blob failed\n");
270 exit(1);
271 }
272 /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
273 snprintf(comment, sizeof(comment),
274 "%u-bit %s, converted by %s@%s from OpenSSH",
275 key_size(k), key_type(k),
276 pw->pw_name, hostname);
277
278 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
279 fprintf(stdout, "Comment: \"%s\"\n", comment);
280 dump_base64(stdout, blob, len);
281 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
282 key_free(k);
283 xfree(blob);
284 exit(0);
285 }
286
287 static void
288 do_convert_to_pkcs8(Key *k)
289 {
290 switch (key_type_plain(k->type)) {
291 case KEY_RSA:
292 if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
293 fatal("PEM_write_RSA_PUBKEY failed");
294 break;
295 case KEY_DSA:
296 if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
297 fatal("PEM_write_DSA_PUBKEY failed");
298 break;
299 #ifdef OPENSSL_HAS_ECC
300 case KEY_ECDSA:
301 if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
302 fatal("PEM_write_EC_PUBKEY failed");
303 break;
304 #endif
305 default:
306 fatal("%s: unsupported key type %s", __func__, key_type(k));
307 }
308 exit(0);
309 }
310
311 static void
312 do_convert_to_pem(Key *k)
313 {
314 switch (key_type_plain(k->type)) {
315 case KEY_RSA:
316 if (!PEM_write_RSAPublicKey(stdout, k->rsa))
317 fatal("PEM_write_RSAPublicKey failed");
318 break;
319 #if notyet /* OpenSSH 0.9.8 lacks this function */
320 case KEY_DSA:
321 if (!PEM_write_DSAPublicKey(stdout, k->dsa))
322 fatal("PEM_write_DSAPublicKey failed");
323 break;
324 #endif
325 /* XXX ECDSA? */
326 default:
327 fatal("%s: unsupported key type %s", __func__, key_type(k));
328 }
329 exit(0);
330 }
331
332 static void
333 do_convert_to(struct passwd *pw)
334 {
335 Key *k;
336 struct stat st;
337
338 if (!have_identity)
339 ask_filename(pw, "Enter file in which the key is");
340 if (stat(identity_file, &st) < 0)
341 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
342 if ((k = key_load_public(identity_file, NULL)) == NULL) {
343 if ((k = load_identity(identity_file)) == NULL) {
344 fprintf(stderr, "load failed\n");
345 exit(1);
346 }
347 }
348 if (k->type == KEY_RSA1) {
349 fprintf(stderr, "version 1 keys are not supported\n");
350 exit(1);
351 }
352
353 switch (convert_format) {
354 case FMT_RFC4716:
355 do_convert_to_ssh2(pw, k);
356 break;
357 case FMT_PKCS8:
358 do_convert_to_pkcs8(k);
359 break;
360 case FMT_PEM:
361 do_convert_to_pem(k);
362 break;
363 default:
364 fatal("%s: unknown key format %d", __func__, convert_format);
365 }
366 exit(0);
367 }
368
369 static void
370 buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
371 {
372 u_int bignum_bits = buffer_get_int(b);
373 u_int bytes = (bignum_bits + 7) / 8;
374
375 if (buffer_len(b) < bytes)
376 fatal("buffer_get_bignum_bits: input buffer too small: "
377 "need %d have %d", bytes, buffer_len(b));
378 if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL)
379 fatal("buffer_get_bignum_bits: BN_bin2bn failed");
380 buffer_consume(b, bytes);
381 }
382
383 static Key *
384 do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
385 {
386 Buffer b;
387 Key *key = NULL;
388 char *type, *cipher;
389 u_char *sig, data[] = "abcde12345";
390 int magic, rlen, ktype, i1, i2, i3, i4;
391 u_int slen;
392 u_long e;
393
394 buffer_init(&b);
395 buffer_append(&b, blob, blen);
396
397 magic = buffer_get_int(&b);
398 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
399 error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
400 buffer_free(&b);
401 return NULL;
402 }
403 i1 = buffer_get_int(&b);
404 type = buffer_get_string(&b, NULL);
405 cipher = buffer_get_string(&b, NULL);
406 i2 = buffer_get_int(&b);
407 i3 = buffer_get_int(&b);
408 i4 = buffer_get_int(&b);
409 debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
410 if (strcmp(cipher, "none") != 0) {
411 error("unsupported cipher %s", cipher);
412 xfree(cipher);
413 buffer_free(&b);
414 xfree(type);
415 return NULL;
416 }
417 xfree(cipher);
418
419 if (strstr(type, "dsa")) {
420 ktype = KEY_DSA;
421 } else if (strstr(type, "rsa")) {
422 ktype = KEY_RSA;
423 } else {
424 buffer_free(&b);
425 xfree(type);
426 return NULL;
427 }
428 key = key_new_private(ktype);
429 xfree(type);
430
431 switch (key->type) {
432 case KEY_DSA:
433 buffer_get_bignum_bits(&b, key->dsa->p);
434 buffer_get_bignum_bits(&b, key->dsa->g);
435 buffer_get_bignum_bits(&b, key->dsa->q);
436 buffer_get_bignum_bits(&b, key->dsa->pub_key);
437 buffer_get_bignum_bits(&b, key->dsa->priv_key);
438 break;
439 case KEY_RSA:
440 e = buffer_get_char(&b);
441 debug("e %lx", e);
442 if (e < 30) {
443 e <<= 8;
444 e += buffer_get_char(&b);
445 debug("e %lx", e);
446 e <<= 8;
447 e += buffer_get_char(&b);
448 debug("e %lx", e);
449 }
450 if (!BN_set_word(key->rsa->e, e)) {
451 buffer_free(&b);
452 key_free(key);
453 return NULL;
454 }
455 buffer_get_bignum_bits(&b, key->rsa->d);
456 buffer_get_bignum_bits(&b, key->rsa->n);
457 buffer_get_bignum_bits(&b, key->rsa->iqmp);
458 buffer_get_bignum_bits(&b, key->rsa->q);
459 buffer_get_bignum_bits(&b, key->rsa->p);
460 rsa_generate_additional_parameters(key->rsa);
461 break;
462 }
463 rlen = buffer_len(&b);
464 if (rlen != 0)
465 error("do_convert_private_ssh2_from_blob: "
466 "remaining bytes in key blob %d", rlen);
467 buffer_free(&b);
468
469 /* try the key */
470 key_sign(key, &sig, &slen, data, sizeof(data));
471 key_verify(key, sig, slen, data, sizeof(data));
472 xfree(sig);
473 return key;
474 }
475
476 static int
477 get_line(FILE *fp, char *line, size_t len)
478 {
479 int c;
480 size_t pos = 0;
481
482 line[0] = '\0';
483 while ((c = fgetc(fp)) != EOF) {
484 if (pos >= len - 1) {
485 fprintf(stderr, "input line too long.\n");
486 exit(1);
487 }
488 switch (c) {
489 case '\r':
490 c = fgetc(fp);
491 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) {
492 fprintf(stderr, "unget: %s\n", strerror(errno));
493 exit(1);
494 }
495 return pos;
496 case '\n':
497 return pos;
498 }
499 line[pos++] = c;
500 line[pos] = '\0';
501 }
502 /* We reached EOF */
503 return -1;
504 }
505
506 static void
507 do_convert_from_ssh2(struct passwd *pw, Key **k, int *private)
508 {
509 int blen;
510 u_int len;
511 char line[1024];
512 u_char blob[8096];
513 char encoded[8096];
514 int escaped = 0;
515 FILE *fp;
516
517 if ((fp = fopen(identity_file, "r")) == NULL)
518 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
519 encoded[0] = '\0';
520 while ((blen = get_line(fp, line, sizeof(line))) != -1) {
521 if (line[blen - 1] == '\\')
522 escaped++;
523 if (strncmp(line, "----", 4) == 0 ||
524 strstr(line, ": ") != NULL) {
525 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
526 *private = 1;
527 if (strstr(line, " END ") != NULL) {
528 break;
529 }
530 /* fprintf(stderr, "ignore: %s", line); */
531 continue;
532 }
533 if (escaped) {
534 escaped--;
535 /* fprintf(stderr, "escaped: %s", line); */
536 continue;
537 }
538 strlcat(encoded, line, sizeof(encoded));
539 }
540 len = strlen(encoded);
541 if (((len % 4) == 3) &&
542 (encoded[len-1] == '=') &&
543 (encoded[len-2] == '=') &&
544 (encoded[len-3] == '='))
545 encoded[len-3] = '\0';
546 blen = uudecode(encoded, blob, sizeof(blob));
547 if (blen < 0) {
548 fprintf(stderr, "uudecode failed.\n");
549 exit(1);
550 }
551 *k = *private ?
552 do_convert_private_ssh2_from_blob(blob, blen) :
553 key_from_blob(blob, blen);
554 if (*k == NULL) {
555 fprintf(stderr, "decode blob failed.\n");
556 exit(1);
557 }
558 fclose(fp);
559 }
560
561 static void
562 do_convert_from_pkcs8(Key **k, int *private)
563 {
564 EVP_PKEY *pubkey;
565 FILE *fp;
566
567 if ((fp = fopen(identity_file, "r")) == NULL)
568 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
569 if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
570 fatal("%s: %s is not a recognised public key format", __func__,
571 identity_file);
572 }
573 fclose(fp);
574 switch (EVP_PKEY_type(pubkey->type)) {
575 case EVP_PKEY_RSA:
576 *k = key_new(KEY_UNSPEC);
577 (*k)->type = KEY_RSA;
578 (*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
579 break;
580 case EVP_PKEY_DSA:
581 *k = key_new(KEY_UNSPEC);
582 (*k)->type = KEY_DSA;
583 (*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
584 break;
585 #ifdef OPENSSL_HAS_ECC
586 case EVP_PKEY_EC:
587 *k = key_new(KEY_UNSPEC);
588 (*k)->type = KEY_ECDSA;
589 (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
590 (*k)->ecdsa_nid = key_ecdsa_key_to_nid((*k)->ecdsa);
591 break;
592 #endif
593 default:
594 fatal("%s: unsupported pubkey type %d", __func__,
595 EVP_PKEY_type(pubkey->type));
596 }
597 EVP_PKEY_free(pubkey);
598 return;
599 }
600
601 static void
602 do_convert_from_pem(Key **k, int *private)
603 {
604 FILE *fp;
605 RSA *rsa;
606 #ifdef notyet
607 DSA *dsa;
608 #endif
609
610 if ((fp = fopen(identity_file, "r")) == NULL)
611 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
612 if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
613 *k = key_new(KEY_UNSPEC);
614 (*k)->type = KEY_RSA;
615 (*k)->rsa = rsa;
616 fclose(fp);
617 return;
618 }
619 #if notyet /* OpenSSH 0.9.8 lacks this function */
620 rewind(fp);
621 if ((dsa = PEM_read_DSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
622 *k = key_new(KEY_UNSPEC);
623 (*k)->type = KEY_DSA;
624 (*k)->dsa = dsa;
625 fclose(fp);
626 return;
627 }
628 /* XXX ECDSA */
629 #endif
630 fatal("%s: unrecognised raw private key format", __func__);
631 }
632
633 static void
634 do_convert_from(struct passwd *pw)
635 {
636 Key *k = NULL;
637 int private = 0, ok = 0;
638 struct stat st;
639
640 if (!have_identity)
641 ask_filename(pw, "Enter file in which the key is");
642 if (stat(identity_file, &st) < 0)
643 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
644
645 switch (convert_format) {
646 case FMT_RFC4716:
647 do_convert_from_ssh2(pw, &k, &private);
648 break;
649 case FMT_PKCS8:
650 do_convert_from_pkcs8(&k, &private);
651 break;
652 case FMT_PEM:
653 do_convert_from_pem(&k, &private);
654 break;
655 default:
656 fatal("%s: unknown key format %d", __func__, convert_format);
657 }
658
659 if (!private)
660 ok = key_write(k, stdout);
661 if (ok)
662 fprintf(stdout, "\n");
663 else {
664 switch (k->type) {
665 case KEY_DSA:
666 ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
667 NULL, 0, NULL, NULL);
668 break;
669 #ifdef OPENSSL_HAS_ECC
670 case KEY_ECDSA:
671 ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
672 NULL, 0, NULL, NULL);
673 break;
674 #endif
675 case KEY_RSA:
676 ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
677 NULL, 0, NULL, NULL);
678 break;
679 default:
680 fatal("%s: unsupported key type %s", __func__,
681 key_type(k));
682 }
683 }
684
685 if (!ok) {
686 fprintf(stderr, "key write failed\n");
687 exit(1);
688 }
689 key_free(k);
690 exit(0);
691 }
692
693 static void
694 do_print_public(struct passwd *pw)
695 {
696 Key *prv;
697 struct stat st;
698
699 if (!have_identity)
700 ask_filename(pw, "Enter file in which the key is");
701 if (stat(identity_file, &st) < 0) {
702 perror(identity_file);
703 exit(1);
704 }
705 prv = load_identity(identity_file);
706 if (prv == NULL) {
707 fprintf(stderr, "load failed\n");
708 exit(1);
709 }
710 if (!key_write(prv, stdout))
711 fprintf(stderr, "key_write failed");
712 key_free(prv);
713 fprintf(stdout, "\n");
714 exit(0);
715 }
716
717 static void
718 do_download(struct passwd *pw)
719 {
720 #ifdef ENABLE_PKCS11
721 Key **keys = NULL;
722 int i, nkeys;
723
724 pkcs11_init(0);
725 nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys);
726 if (nkeys <= 0)
727 fatal("cannot read public key from pkcs11");
728 for (i = 0; i < nkeys; i++) {
729 key_write(keys[i], stdout);
730 key_free(keys[i]);
731 fprintf(stdout, "\n");
732 }
733 xfree(keys);
734 pkcs11_terminate();
735 exit(0);
736 #else
737 fatal("no pkcs11 support");
738 #endif /* ENABLE_PKCS11 */
739 }
740
741 static void
742 do_fingerprint(struct passwd *pw)
743 {
744 FILE *f;
745 Key *public;
746 char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra;
747 int i, skip = 0, num = 0, invalid = 1;
748 enum fp_rep rep;
749 enum fp_type fptype;
750 struct stat st;
751
752 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
753 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
754
755 if (!have_identity)
756 ask_filename(pw, "Enter file in which the key is");
757 if (stat(identity_file, &st) < 0) {
758 perror(identity_file);
759 exit(1);
760 }
761 public = key_load_public(identity_file, &comment);
762 if (public != NULL) {
763 fp = key_fingerprint(public, fptype, rep);
764 ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
765 printf("%u %s %s (%s)\n", key_size(public), fp, comment,
766 key_type(public));
767 if (log_level >= SYSLOG_LEVEL_VERBOSE)
768 printf("%s\n", ra);
769 key_free(public);
770 xfree(comment);
771 xfree(ra);
772 xfree(fp);
773 exit(0);
774 }
775 if (comment) {
776 xfree(comment);
777 comment = NULL;
778 }
779
780 if ((f = fopen(identity_file, "r")) == NULL)
781 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
782
783 while (fgets(line, sizeof(line), f)) {
784 if ((cp = strchr(line, '\n')) == NULL) {
785 error("line %d too long: %.40s...",
786 num + 1, line);
787 skip = 1;
788 continue;
789 }
790 num++;
791 if (skip) {
792 skip = 0;
793 continue;
794 }
795 *cp = '\0';
796
797 /* Skip leading whitespace, empty and comment lines. */
798 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
799 ;
800 if (!*cp || *cp == '\n' || *cp == '#')
801 continue;
802 i = strtol(cp, &ep, 10);
803 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
804 int quoted = 0;
805 comment = cp;
806 for (; *cp && (quoted || (*cp != ' ' &&
807 *cp != '\t')); cp++) {
808 if (*cp == '\\' && cp[1] == '"')
809 cp++; /* Skip both */
810 else if (*cp == '"')
811 quoted = !quoted;
812 }
813 if (!*cp)
814 continue;
815 *cp++ = '\0';
816 }
817 ep = cp;
818 public = key_new(KEY_RSA1);
819 if (key_read(public, &cp) != 1) {
820 cp = ep;
821 key_free(public);
822 public = key_new(KEY_UNSPEC);
823 if (key_read(public, &cp) != 1) {
824 key_free(public);
825 continue;
826 }
827 }
828 comment = *cp ? cp : comment;
829 fp = key_fingerprint(public, fptype, rep);
830 ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
831 printf("%u %s %s (%s)\n", key_size(public), fp,
832 comment ? comment : "no comment", key_type(public));
833 if (log_level >= SYSLOG_LEVEL_VERBOSE)
834 printf("%s\n", ra);
835 xfree(ra);
836 xfree(fp);
837 key_free(public);
838 invalid = 0;
839 }
840 fclose(f);
841
842 if (invalid) {
843 printf("%s is not a public key file.\n", identity_file);
844 exit(1);
845 }
846 exit(0);
847 }
848
849 static void
850 do_gen_all_hostkeys(struct passwd *pw)
851 {
852 struct {
853 char *key_type;
854 char *key_type_display;
855 char *path;
856 } key_types[] = {
857 { "rsa1", "RSA1", _PATH_HOST_KEY_FILE },
858 { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
859 { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE },
860 { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
861 { NULL, NULL, NULL }
862 };
863
864 int first = 0;
865 struct stat st;
866 Key *private, *public;
867 char comment[1024];
868 int i, type, fd;
869 FILE *f;
870
871 for (i = 0; key_types[i].key_type; i++) {
872 if (stat(key_types[i].path, &st) == 0)
873 continue;
874 if (errno != ENOENT) {
875 printf("Could not stat %s: %s", key_types[i].path,
876 strerror(errno));
877 first = 0;
878 continue;
879 }
880
881 if (first == 0) {
882 first = 1;
883 printf("%s: generating new host keys: ", __progname);
884 }
885 printf("%s ", key_types[i].key_type_display);
886 fflush(stdout);
887 arc4random_stir();
888 type = key_type_from_name(key_types[i].key_type);
889 strlcpy(identity_file, key_types[i].path, sizeof(identity_file));
890 bits = 0;
891 type_bits_valid(type, &bits);
892 private = key_generate(type, bits);
893 if (private == NULL) {
894 fprintf(stderr, "key_generate failed\n");
895 first = 0;
896 continue;
897 }
898 public = key_from_private(private);
899 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
900 hostname);
901 if (!key_save_private(private, identity_file, "", comment)) {
902 printf("Saving the key failed: %s.\n", identity_file);
903 key_free(private);
904 key_free(public);
905 first = 0;
906 continue;
907 }
908 key_free(private);
909 arc4random_stir();
910 strlcat(identity_file, ".pub", sizeof(identity_file));
911 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
912 if (fd == -1) {
913 printf("Could not save your public key in %s\n",
914 identity_file);
915 key_free(public);
916 first = 0;
917 continue;
918 }
919 f = fdopen(fd, "w");
920 if (f == NULL) {
921 printf("fdopen %s failed\n", identity_file);
922 key_free(public);
923 first = 0;
924 continue;
925 }
926 if (!key_write(public, f)) {
927 fprintf(stderr, "write key failed\n");
928 key_free(public);
929 first = 0;
930 continue;
931 }
932 fprintf(f, " %s\n", comment);
933 fclose(f);
934 key_free(public);
935
936 }
937 if (first != 0)
938 printf("\n");
939 }
940
941 static void
942 printhost(FILE *f, const char *name, Key *public, int ca, int hash)
943 {
944 if (print_fingerprint) {
945 enum fp_rep rep;
946 enum fp_type fptype;
947 char *fp, *ra;
948
949 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
950 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
951 fp = key_fingerprint(public, fptype, rep);
952 ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
953 printf("%u %s %s (%s)\n", key_size(public), fp, name,
954 key_type(public));
955 if (log_level >= SYSLOG_LEVEL_VERBOSE)
956 printf("%s\n", ra);
957 xfree(ra);
958 xfree(fp);
959 } else {
960 if (hash && (name = host_hash(name, NULL, 0)) == NULL)
961 fatal("hash_host failed");
962 fprintf(f, "%s%s%s ", ca ? CA_MARKER : "", ca ? " " : "", name);
963 if (!key_write(public, f))
964 fatal("key_write failed");
965 fprintf(f, "\n");
966 }
967 }
968
969 static void
970 do_known_hosts(struct passwd *pw, const char *name)
971 {
972 FILE *in, *out = stdout;
973 Key *pub;
974 char *cp, *cp2, *kp, *kp2;
975 char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN];
976 int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0;
977 int ca;
978
979 if (!have_identity) {
980 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
981 if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
982 sizeof(identity_file))
983 fatal("Specified known hosts path too long");
984 xfree(cp);
985 have_identity = 1;
986 }
987 if ((in = fopen(identity_file, "r")) == NULL)
988 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
989
990 /*
991 * Find hosts goes to stdout, hash and deletions happen in-place
992 * A corner case is ssh-keygen -HF foo, which should go to stdout
993 */
994 if (!find_host && (hash_hosts || delete_host)) {
995 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
996 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
997 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
998 strlcat(old, ".old", sizeof(old)) >= sizeof(old))
999 fatal("known_hosts path too long");
1000 umask(077);
1001 if ((c = mkstemp(tmp)) == -1)
1002 fatal("mkstemp: %s", strerror(errno));
1003 if ((out = fdopen(c, "w")) == NULL) {
1004 c = errno;
1005 unlink(tmp);
1006 fatal("fdopen: %s", strerror(c));
1007 }
1008 inplace = 1;
1009 }
1010
1011 while (fgets(line, sizeof(line), in)) {
1012 if ((cp = strchr(line, '\n')) == NULL) {
1013 error("line %d too long: %.40s...", num + 1, line);
1014 skip = 1;
1015 invalid = 1;
1016 continue;
1017 }
1018 num++;
1019 if (skip) {
1020 skip = 0;
1021 continue;
1022 }
1023 *cp = '\0';
1024
1025 /* Skip leading whitespace, empty and comment lines. */
1026 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
1027 ;
1028 if (!*cp || *cp == '\n' || *cp == '#') {
1029 if (inplace)
1030 fprintf(out, "%s\n", cp);
1031 continue;
1032 }
1033 /* Check whether this is a CA key */
1034 if (strncasecmp(cp, CA_MARKER, sizeof(CA_MARKER) - 1) == 0 &&
1035 (cp[sizeof(CA_MARKER) - 1] == ' ' ||
1036 cp[sizeof(CA_MARKER) - 1] == '\t')) {
1037 ca = 1;
1038 cp += sizeof(CA_MARKER);
1039 } else
1040 ca = 0;
1041
1042 /* Find the end of the host name portion. */
1043 for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++)
1044 ;
1045
1046 if (*kp == '\0' || *(kp + 1) == '\0') {
1047 error("line %d missing key: %.40s...",
1048 num, line);
1049 invalid = 1;
1050 continue;
1051 }
1052 *kp++ = '\0';
1053 kp2 = kp;
1054
1055 pub = key_new(KEY_RSA1);
1056 if (key_read(pub, &kp) != 1) {
1057 kp = kp2;
1058 key_free(pub);
1059 pub = key_new(KEY_UNSPEC);
1060 if (key_read(pub, &kp) != 1) {
1061 error("line %d invalid key: %.40s...",
1062 num, line);
1063 key_free(pub);
1064 invalid = 1;
1065 continue;
1066 }
1067 }
1068
1069 if (*cp == HASH_DELIM) {
1070 if (find_host || delete_host) {
1071 cp2 = host_hash(name, cp, strlen(cp));
1072 if (cp2 == NULL) {
1073 error("line %d: invalid hashed "
1074 "name: %.64s...", num, line);
1075 invalid = 1;
1076 continue;
1077 }
1078 c = (strcmp(cp2, cp) == 0);
1079 if (find_host && c) {
1080 printf("# Host %s found: "
1081 "line %d type %s%s\n", name,
1082 num, key_type(pub),
1083 ca ? " (CA key)" : "");
1084 printhost(out, cp, pub, ca, 0);
1085 }
1086 if (delete_host && !c && !ca)
1087 printhost(out, cp, pub, ca, 0);
1088 } else if (hash_hosts)
1089 printhost(out, cp, pub, ca, 0);
1090 } else {
1091 if (find_host || delete_host) {
1092 c = (match_hostname(name, cp,
1093 strlen(cp)) == 1);
1094 if (find_host && c) {
1095 printf("# Host %s found: "
1096 "line %d type %s%s\n", name,
1097 num, key_type(pub),
1098 ca ? " (CA key)" : "");
1099 printhost(out, name, pub,
1100 ca, hash_hosts && !ca);
1101 }
1102 if (delete_host && !c && !ca)
1103 printhost(out, cp, pub, ca, 0);
1104 } else if (hash_hosts) {
1105 for (cp2 = strsep(&cp, ",");
1106 cp2 != NULL && *cp2 != '\0';
1107 cp2 = strsep(&cp, ",")) {
1108 if (ca) {
1109 fprintf(stderr, "Warning: "
1110 "ignoring CA key for host: "
1111 "%.64s\n", cp2);
1112 printhost(out, cp2, pub, ca, 0);
1113 } else if (strcspn(cp2, "*?!") !=
1114 strlen(cp2)) {
1115 fprintf(stderr, "Warning: "
1116 "ignoring host name with "
1117 "metacharacters: %.64s\n",
1118 cp2);
1119 printhost(out, cp2, pub, ca, 0);
1120 } else
1121 printhost(out, cp2, pub, ca, 1);
1122 }
1123 has_unhashed = 1;
1124 }
1125 }
1126 key_free(pub);
1127 }
1128 fclose(in);
1129
1130 if (invalid) {
1131 fprintf(stderr, "%s is not a valid known_hosts file.\n",
1132 identity_file);
1133 if (inplace) {
1134 fprintf(stderr, "Not replacing existing known_hosts "
1135 "file because of errors\n");
1136 fclose(out);
1137 unlink(tmp);
1138 }
1139 exit(1);
1140 }
1141
1142 if (inplace) {
1143 fclose(out);
1144
1145 /* Backup existing file */
1146 if (unlink(old) == -1 && errno != ENOENT)
1147 fatal("unlink %.100s: %s", old, strerror(errno));
1148 if (link(identity_file, old) == -1)
1149 fatal("link %.100s to %.100s: %s", identity_file, old,
1150 strerror(errno));
1151 /* Move new one into place */
1152 if (rename(tmp, identity_file) == -1) {
1153 error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
1154 strerror(errno));
1155 unlink(tmp);
1156 unlink(old);
1157 exit(1);
1158 }
1159
1160 fprintf(stderr, "%s updated.\n", identity_file);
1161 fprintf(stderr, "Original contents retained as %s\n", old);
1162 if (has_unhashed) {
1163 fprintf(stderr, "WARNING: %s contains unhashed "
1164 "entries\n", old);
1165 fprintf(stderr, "Delete this file to ensure privacy "
1166 "of hostnames\n");
1167 }
1168 }
1169
1170 exit(0);
1171 }
1172
1173 /*
1174 * Perform changing a passphrase. The argument is the passwd structure
1175 * for the current user.
1176 */
1177 static void
1178 do_change_passphrase(struct passwd *pw)
1179 {
1180 char *comment;
1181 char *old_passphrase, *passphrase1, *passphrase2;
1182 struct stat st;
1183 Key *private;
1184
1185 if (!have_identity)
1186 ask_filename(pw, "Enter file in which the key is");
1187 if (stat(identity_file, &st) < 0) {
1188 perror(identity_file);
1189 exit(1);
1190 }
1191 /* Try to load the file with empty passphrase. */
1192 private = key_load_private(identity_file, "", &comment);
1193 if (private == NULL) {
1194 if (identity_passphrase)
1195 old_passphrase = xstrdup(identity_passphrase);
1196 else
1197 old_passphrase =
1198 read_passphrase("Enter old passphrase: ",
1199 RP_ALLOW_STDIN);
1200 private = key_load_private(identity_file, old_passphrase,
1201 &comment);
1202 memset(old_passphrase, 0, strlen(old_passphrase));
1203 xfree(old_passphrase);
1204 if (private == NULL) {
1205 printf("Bad passphrase.\n");
1206 exit(1);
1207 }
1208 }
1209 printf("Key has comment '%s'\n", comment);
1210
1211 /* Ask the new passphrase (twice). */
1212 if (identity_new_passphrase) {
1213 passphrase1 = xstrdup(identity_new_passphrase);
1214 passphrase2 = NULL;
1215 } else {
1216 passphrase1 =
1217 read_passphrase("Enter new passphrase (empty for no "
1218 "passphrase): ", RP_ALLOW_STDIN);
1219 passphrase2 = read_passphrase("Enter same passphrase again: ",
1220 RP_ALLOW_STDIN);
1221
1222 /* Verify that they are the same. */
1223 if (strcmp(passphrase1, passphrase2) != 0) {
1224 memset(passphrase1, 0, strlen(passphrase1));
1225 memset(passphrase2, 0, strlen(passphrase2));
1226 xfree(passphrase1);
1227 xfree(passphrase2);
1228 printf("Pass phrases do not match. Try again.\n");
1229 exit(1);
1230 }
1231 /* Destroy the other copy. */
1232 memset(passphrase2, 0, strlen(passphrase2));
1233 xfree(passphrase2);
1234 }
1235
1236 /* Save the file using the new passphrase. */
1237 if (!key_save_private(private, identity_file, passphrase1, comment)) {
1238 printf("Saving the key failed: %s.\n", identity_file);
1239 memset(passphrase1, 0, strlen(passphrase1));
1240 xfree(passphrase1);
1241 key_free(private);
1242 xfree(comment);
1243 exit(1);
1244 }
1245 /* Destroy the passphrase and the copy of the key in memory. */
1246 memset(passphrase1, 0, strlen(passphrase1));
1247 xfree(passphrase1);
1248 key_free(private); /* Destroys contents */
1249 xfree(comment);
1250
1251 printf("Your identification has been saved with the new passphrase.\n");
1252 exit(0);
1253 }
1254
1255 /*
1256 * Print the SSHFP RR.
1257 */
1258 static int
1259 do_print_resource_record(struct passwd *pw, char *fname, char *hname)
1260 {
1261 Key *public;
1262 char *comment = NULL;
1263 struct stat st;
1264
1265 if (fname == NULL)
1266 ask_filename(pw, "Enter file in which the key is");
1267 if (stat(fname, &st) < 0) {
1268 if (errno == ENOENT)
1269 return 0;
1270 perror(fname);
1271 exit(1);
1272 }
1273 public = key_load_public(fname, &comment);
1274 if (public != NULL) {
1275 export_dns_rr(hname, public, stdout, print_generic);
1276 key_free(public);
1277 xfree(comment);
1278 return 1;
1279 }
1280 if (comment)
1281 xfree(comment);
1282
1283 printf("failed to read v2 public key from %s.\n", fname);
1284 exit(1);
1285 }
1286
1287 /*
1288 * Change the comment of a private key file.
1289 */
1290 static void
1291 do_change_comment(struct passwd *pw)
1292 {
1293 char new_comment[1024], *comment, *passphrase;
1294 Key *private;
1295 Key *public;
1296 struct stat st;
1297 FILE *f;
1298 int fd;
1299
1300 if (!have_identity)
1301 ask_filename(pw, "Enter file in which the key is");
1302 if (stat(identity_file, &st) < 0) {
1303 perror(identity_file);
1304 exit(1);
1305 }
1306 private = key_load_private(identity_file, "", &comment);
1307 if (private == NULL) {
1308 if (identity_passphrase)
1309 passphrase = xstrdup(identity_passphrase);
1310 else if (identity_new_passphrase)
1311 passphrase = xstrdup(identity_new_passphrase);
1312 else
1313 passphrase = read_passphrase("Enter passphrase: ",
1314 RP_ALLOW_STDIN);
1315 /* Try to load using the passphrase. */
1316 private = key_load_private(identity_file, passphrase, &comment);
1317 if (private == NULL) {
1318 memset(passphrase, 0, strlen(passphrase));
1319 xfree(passphrase);
1320 printf("Bad passphrase.\n");
1321 exit(1);
1322 }
1323 } else {
1324 passphrase = xstrdup("");
1325 }
1326 if (private->type != KEY_RSA1) {
1327 fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
1328 key_free(private);
1329 exit(1);
1330 }
1331 printf("Key now has comment '%s'\n", comment);
1332
1333 if (identity_comment) {
1334 strlcpy(new_comment, identity_comment, sizeof(new_comment));
1335 } else {
1336 printf("Enter new comment: ");
1337 fflush(stdout);
1338 if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1339 memset(passphrase, 0, strlen(passphrase));
1340 key_free(private);
1341 exit(1);
1342 }
1343 new_comment[strcspn(new_comment, "\n")] = '\0';
1344 }
1345
1346 /* Save the file using the new passphrase. */
1347 if (!key_save_private(private, identity_file, passphrase, new_comment)) {
1348 printf("Saving the key failed: %s.\n", identity_file);
1349 memset(passphrase, 0, strlen(passphrase));
1350 xfree(passphrase);
1351 key_free(private);
1352 xfree(comment);
1353 exit(1);
1354 }
1355 memset(passphrase, 0, strlen(passphrase));
1356 xfree(passphrase);
1357 public = key_from_private(private);
1358 key_free(private);
1359
1360 strlcat(identity_file, ".pub", sizeof(identity_file));
1361 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1362 if (fd == -1) {
1363 printf("Could not save your public key in %s\n", identity_file);
1364 exit(1);
1365 }
1366 f = fdopen(fd, "w");
1367 if (f == NULL) {
1368 printf("fdopen %s failed\n", identity_file);
1369 exit(1);
1370 }
1371 if (!key_write(public, f))
1372 fprintf(stderr, "write key failed\n");
1373 key_free(public);
1374 fprintf(f, " %s\n", new_comment);
1375 fclose(f);
1376
1377 xfree(comment);
1378
1379 printf("The comment in your key file has been changed.\n");
1380 exit(0);
1381 }
1382
1383 static const char *
1384 fmt_validity(u_int64_t valid_from, u_int64_t valid_to)
1385 {
1386 char from[32], to[32];
1387 static char ret[64];
1388 time_t tt;
1389 struct tm *tm;
1390
1391 *from = *to = '\0';
1392 if (valid_from == 0 && valid_to == 0xffffffffffffffffULL)
1393 return "forever";
1394
1395 if (valid_from != 0) {
1396 /* XXX revisit INT_MAX in 2038 :) */
1397 tt = valid_from > INT_MAX ? INT_MAX : valid_from;
1398 tm = localtime(&tt);
1399 strftime(from, sizeof(from), "%Y-%m-%dT%H:%M:%S", tm);
1400 }
1401 if (valid_to != 0xffffffffffffffffULL) {
1402 /* XXX revisit INT_MAX in 2038 :) */
1403 tt = valid_to > INT_MAX ? INT_MAX : valid_to;
1404 tm = localtime(&tt);
1405 strftime(to, sizeof(to), "%Y-%m-%dT%H:%M:%S", tm);
1406 }
1407
1408 if (valid_from == 0) {
1409 snprintf(ret, sizeof(ret), "before %s", to);
1410 return ret;
1411 }
1412 if (valid_to == 0xffffffffffffffffULL) {
1413 snprintf(ret, sizeof(ret), "after %s", from);
1414 return ret;
1415 }
1416
1417 snprintf(ret, sizeof(ret), "from %s to %s", from, to);
1418 return ret;
1419 }
1420
1421 static void
1422 add_flag_option(Buffer *c, const char *name)
1423 {
1424 debug3("%s: %s", __func__, name);
1425 buffer_put_cstring(c, name);
1426 buffer_put_string(c, NULL, 0);
1427 }
1428
1429 static void
1430 add_string_option(Buffer *c, const char *name, const char *value)
1431 {
1432 Buffer b;
1433
1434 debug3("%s: %s=%s", __func__, name, value);
1435 buffer_init(&b);
1436 buffer_put_cstring(&b, value);
1437
1438 buffer_put_cstring(c, name);
1439 buffer_put_string(c, buffer_ptr(&b), buffer_len(&b));
1440
1441 buffer_free(&b);
1442 }
1443
1444 #define OPTIONS_CRITICAL 1
1445 #define OPTIONS_EXTENSIONS 2
1446 static void
1447 prepare_options_buf(Buffer *c, int which)
1448 {
1449 buffer_clear(c);
1450 if ((which & OPTIONS_CRITICAL) != 0 &&
1451 certflags_command != NULL)
1452 add_string_option(c, "force-command", certflags_command);
1453 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1454 (certflags_flags & CERTOPT_X_FWD) != 0)
1455 add_flag_option(c, "permit-X11-forwarding");
1456 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1457 (certflags_flags & CERTOPT_AGENT_FWD) != 0)
1458 add_flag_option(c, "permit-agent-forwarding");
1459 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1460 (certflags_flags & CERTOPT_PORT_FWD) != 0)
1461 add_flag_option(c, "permit-port-forwarding");
1462 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1463 (certflags_flags & CERTOPT_PTY) != 0)
1464 add_flag_option(c, "permit-pty");
1465 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1466 (certflags_flags & CERTOPT_USER_RC) != 0)
1467 add_flag_option(c, "permit-user-rc");
1468 if ((which & OPTIONS_CRITICAL) != 0 &&
1469 certflags_src_addr != NULL)
1470 add_string_option(c, "source-address", certflags_src_addr);
1471 }
1472
1473 static Key *
1474 load_pkcs11_key(char *path)
1475 {
1476 #ifdef ENABLE_PKCS11
1477 Key **keys = NULL, *public, *private = NULL;
1478 int i, nkeys;
1479
1480 if ((public = key_load_public(path, NULL)) == NULL)
1481 fatal("Couldn't load CA public key \"%s\"", path);
1482
1483 nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys);
1484 debug3("%s: %d keys", __func__, nkeys);
1485 if (nkeys <= 0)
1486 fatal("cannot read public key from pkcs11");
1487 for (i = 0; i < nkeys; i++) {
1488 if (key_equal_public(public, keys[i])) {
1489 private = keys[i];
1490 continue;
1491 }
1492 key_free(keys[i]);
1493 }
1494 xfree(keys);
1495 key_free(public);
1496 return private;
1497 #else
1498 fatal("no pkcs11 support");
1499 #endif /* ENABLE_PKCS11 */
1500 }
1501
1502 static void
1503 do_ca_sign(struct passwd *pw, int argc, char **argv)
1504 {
1505 int i, fd;
1506 u_int n;
1507 Key *ca, *public;
1508 char *otmp, *tmp, *cp, *out, *comment, **plist = NULL;
1509 FILE *f;
1510 int v00 = 0; /* legacy keys */
1511
1512 if (key_type_name != NULL) {
1513 switch (key_type_from_name(key_type_name)) {
1514 case KEY_RSA_CERT_V00:
1515 case KEY_DSA_CERT_V00:
1516 v00 = 1;
1517 break;
1518 case KEY_UNSPEC:
1519 if (strcasecmp(key_type_name, "v00") == 0) {
1520 v00 = 1;
1521 break;
1522 } else if (strcasecmp(key_type_name, "v01") == 0)
1523 break;
1524 /* FALLTHROUGH */
1525 default:
1526 fprintf(stderr, "unknown key type %s\n", key_type_name);
1527 exit(1);
1528 }
1529 }
1530
1531 pkcs11_init(1);
1532 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1533 if (pkcs11provider != NULL) {
1534 if ((ca = load_pkcs11_key(tmp)) == NULL)
1535 fatal("No PKCS#11 key matching %s found", ca_key_path);
1536 } else if ((ca = load_identity(tmp)) == NULL)
1537 fatal("Couldn't load CA key \"%s\"", tmp);
1538 xfree(tmp);
1539
1540 for (i = 0; i < argc; i++) {
1541 /* Split list of principals */
1542 n = 0;
1543 if (cert_principals != NULL) {
1544 otmp = tmp = xstrdup(cert_principals);
1545 plist = NULL;
1546 for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1547 plist = xrealloc(plist, n + 1, sizeof(*plist));
1548 if (*(plist[n] = xstrdup(cp)) == '\0')
1549 fatal("Empty principal name");
1550 }
1551 xfree(otmp);
1552 }
1553
1554 tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1555 if ((public = key_load_public(tmp, &comment)) == NULL)
1556 fatal("%s: unable to open \"%s\"", __func__, tmp);
1557 if (public->type != KEY_RSA && public->type != KEY_DSA &&
1558 public->type != KEY_ECDSA)
1559 fatal("%s: key \"%s\" type %s cannot be certified",
1560 __func__, tmp, key_type(public));
1561
1562 /* Prepare certificate to sign */
1563 if (key_to_certified(public, v00) != 0)
1564 fatal("Could not upgrade key %s to certificate", tmp);
1565 public->cert->type = cert_key_type;
1566 public->cert->serial = (u_int64_t)cert_serial;
1567 public->cert->key_id = xstrdup(cert_key_id);
1568 public->cert->nprincipals = n;
1569 public->cert->principals = plist;
1570 public->cert->valid_after = cert_valid_from;
1571 public->cert->valid_before = cert_valid_to;
1572 if (v00) {
1573 prepare_options_buf(&public->cert->critical,
1574 OPTIONS_CRITICAL|OPTIONS_EXTENSIONS);
1575 } else {
1576 prepare_options_buf(&public->cert->critical,
1577 OPTIONS_CRITICAL);
1578 prepare_options_buf(&public->cert->extensions,
1579 OPTIONS_EXTENSIONS);
1580 }
1581 public->cert->signature_key = key_from_private(ca);
1582
1583 if (key_certify(public, ca) != 0)
1584 fatal("Couldn't not certify key %s", tmp);
1585
1586 if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1587 *cp = '\0';
1588 xasprintf(&out, "%s-cert.pub", tmp);
1589 xfree(tmp);
1590
1591 if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
1592 fatal("Could not open \"%s\" for writing: %s", out,
1593 strerror(errno));
1594 if ((f = fdopen(fd, "w")) == NULL)
1595 fatal("%s: fdopen: %s", __func__, strerror(errno));
1596 if (!key_write(public, f))
1597 fatal("Could not write certified key to %s", out);
1598 fprintf(f, " %s\n", comment);
1599 fclose(f);
1600
1601 if (!quiet) {
1602 logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1603 "valid %s", key_cert_type(public),
1604 out, public->cert->key_id,
1605 (unsigned long long)public->cert->serial,
1606 cert_principals != NULL ? " for " : "",
1607 cert_principals != NULL ? cert_principals : "",
1608 fmt_validity(cert_valid_from, cert_valid_to));
1609 }
1610
1611 key_free(public);
1612 xfree(out);
1613 }
1614 pkcs11_terminate();
1615 exit(0);
1616 }
1617
1618 static u_int64_t
1619 parse_relative_time(const char *s, time_t now)
1620 {
1621 int64_t mul, secs;
1622
1623 mul = *s == '-' ? -1 : 1;
1624
1625 if ((secs = convtime(s + 1)) == -1)
1626 fatal("Invalid relative certificate time %s", s);
1627 if (mul == -1 && secs > now)
1628 fatal("Certificate time %s cannot be represented", s);
1629 return now + (u_int64_t)(secs * mul);
1630 }
1631
1632 static u_int64_t
1633 parse_absolute_time(const char *s)
1634 {
1635 struct tm tm;
1636 time_t tt;
1637 char buf[32], *fmt;
1638
1639 /*
1640 * POSIX strptime says "The application shall ensure that there
1641 * is white-space or other non-alphanumeric characters between
1642 * any two conversion specifications" so arrange things this way.
1643 */
1644 switch (strlen(s)) {
1645 case 8:
1646 fmt = "%Y-%m-%d";
1647 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6);
1648 break;
1649 case 14:
1650 fmt = "%Y-%m-%dT%H:%M:%S";
1651 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s",
1652 s, s + 4, s + 6, s + 8, s + 10, s + 12);
1653 break;
1654 default:
1655 fatal("Invalid certificate time format %s", s);
1656 }
1657
1658 bzero(&tm, sizeof(tm));
1659 if (strptime(buf, fmt, &tm) == NULL)
1660 fatal("Invalid certificate time %s", s);
1661 if ((tt = mktime(&tm)) < 0)
1662 fatal("Certificate time %s cannot be represented", s);
1663 return (u_int64_t)tt;
1664 }
1665
1666 static void
1667 parse_cert_times(char *timespec)
1668 {
1669 char *from, *to;
1670 time_t now = time(NULL);
1671 int64_t secs;
1672
1673 /* +timespec relative to now */
1674 if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1675 if ((secs = convtime(timespec + 1)) == -1)
1676 fatal("Invalid relative certificate life %s", timespec);
1677 cert_valid_to = now + secs;
1678 /*
1679 * Backdate certificate one minute to avoid problems on hosts
1680 * with poorly-synchronised clocks.
1681 */
1682 cert_valid_from = ((now - 59)/ 60) * 60;
1683 return;
1684 }
1685
1686 /*
1687 * from:to, where
1688 * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1689 * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1690 */
1691 from = xstrdup(timespec);
1692 to = strchr(from, ':');
1693 if (to == NULL || from == to || *(to + 1) == '\0')
1694 fatal("Invalid certificate life specification %s", timespec);
1695 *to++ = '\0';
1696
1697 if (*from == '-' || *from == '+')
1698 cert_valid_from = parse_relative_time(from, now);
1699 else
1700 cert_valid_from = parse_absolute_time(from);
1701
1702 if (*to == '-' || *to == '+')
1703 cert_valid_to = parse_relative_time(to, cert_valid_from);
1704 else
1705 cert_valid_to = parse_absolute_time(to);
1706
1707 if (cert_valid_to <= cert_valid_from)
1708 fatal("Empty certificate validity interval");
1709 xfree(from);
1710 }
1711
1712 static void
1713 add_cert_option(char *opt)
1714 {
1715 char *val;
1716
1717 if (strcasecmp(opt, "clear") == 0)
1718 certflags_flags = 0;
1719 else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1720 certflags_flags &= ~CERTOPT_X_FWD;
1721 else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1722 certflags_flags |= CERTOPT_X_FWD;
1723 else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1724 certflags_flags &= ~CERTOPT_AGENT_FWD;
1725 else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1726 certflags_flags |= CERTOPT_AGENT_FWD;
1727 else if (strcasecmp(opt, "no-port-forwarding") == 0)
1728 certflags_flags &= ~CERTOPT_PORT_FWD;
1729 else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1730 certflags_flags |= CERTOPT_PORT_FWD;
1731 else if (strcasecmp(opt, "no-pty") == 0)
1732 certflags_flags &= ~CERTOPT_PTY;
1733 else if (strcasecmp(opt, "permit-pty") == 0)
1734 certflags_flags |= CERTOPT_PTY;
1735 else if (strcasecmp(opt, "no-user-rc") == 0)
1736 certflags_flags &= ~CERTOPT_USER_RC;
1737 else if (strcasecmp(opt, "permit-user-rc") == 0)
1738 certflags_flags |= CERTOPT_USER_RC;
1739 else if (strncasecmp(opt, "force-command=", 14) == 0) {
1740 val = opt + 14;
1741 if (*val == '\0')
1742 fatal("Empty force-command option");
1743 if (certflags_command != NULL)
1744 fatal("force-command already specified");
1745 certflags_command = xstrdup(val);
1746 } else if (strncasecmp(opt, "source-address=", 15) == 0) {
1747 val = opt + 15;
1748 if (*val == '\0')
1749 fatal("Empty source-address option");
1750 if (certflags_src_addr != NULL)
1751 fatal("source-address already specified");
1752 if (addr_match_cidr_list(NULL, val) != 0)
1753 fatal("Invalid source-address list");
1754 certflags_src_addr = xstrdup(val);
1755 } else
1756 fatal("Unsupported certificate option \"%s\"", opt);
1757 }
1758
1759 static void
1760 show_options(const Buffer *optbuf, int v00, int in_critical)
1761 {
1762 u_char *name, *data;
1763 u_int dlen;
1764 Buffer options, option;
1765
1766 buffer_init(&options);
1767 buffer_append(&options, buffer_ptr(optbuf), buffer_len(optbuf));
1768
1769 buffer_init(&option);
1770 while (buffer_len(&options) != 0) {
1771 name = buffer_get_string(&options, NULL);
1772 data = buffer_get_string_ptr(&options, &dlen);
1773 buffer_append(&option, data, dlen);
1774 printf(" %s", name);
1775 if ((v00 || !in_critical) &&
1776 (strcmp(name, "permit-X11-forwarding") == 0 ||
1777 strcmp(name, "permit-agent-forwarding") == 0 ||
1778 strcmp(name, "permit-port-forwarding") == 0 ||
1779 strcmp(name, "permit-pty") == 0 ||
1780 strcmp(name, "permit-user-rc") == 0))
1781 printf("\n");
1782 else if ((v00 || in_critical) &&
1783 (strcmp(name, "force-command") == 0 ||
1784 strcmp(name, "source-address") == 0)) {
1785 data = buffer_get_string(&option, NULL);
1786 printf(" %s\n", data);
1787 xfree(data);
1788 } else {
1789 printf(" UNKNOWN OPTION (len %u)\n",
1790 buffer_len(&option));
1791 buffer_clear(&option);
1792 }
1793 xfree(name);
1794 if (buffer_len(&option) != 0)
1795 fatal("Option corrupt: extra data at end");
1796 }
1797 buffer_free(&option);
1798 buffer_free(&options);
1799 }
1800
1801 static void
1802 do_show_cert(struct passwd *pw)
1803 {
1804 Key *key;
1805 struct stat st;
1806 char *key_fp, *ca_fp;
1807 u_int i, v00;
1808
1809 if (!have_identity)
1810 ask_filename(pw, "Enter file in which the key is");
1811 if (stat(identity_file, &st) < 0)
1812 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1813 if ((key = key_load_public(identity_file, NULL)) == NULL)
1814 fatal("%s is not a public key", identity_file);
1815 if (!key_is_cert(key))
1816 fatal("%s is not a certificate", identity_file);
1817 v00 = key->type == KEY_RSA_CERT_V00 || key->type == KEY_DSA_CERT_V00;
1818
1819 key_fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX);
1820 ca_fp = key_fingerprint(key->cert->signature_key,
1821 SSH_FP_MD5, SSH_FP_HEX);
1822
1823 printf("%s:\n", identity_file);
1824 printf(" Type: %s %s certificate\n", key_ssh_name(key),
1825 key_cert_type(key));
1826 printf(" Public key: %s %s\n", key_type(key), key_fp);
1827 printf(" Signing CA: %s %s\n",
1828 key_type(key->cert->signature_key), ca_fp);
1829 printf(" Key ID: \"%s\"\n", key->cert->key_id);
1830 if (!v00) {
1831 printf(" Serial: %llu\n",
1832 (unsigned long long)key->cert->serial);
1833 }
1834 printf(" Valid: %s\n",
1835 fmt_validity(key->cert->valid_after, key->cert->valid_before));
1836 printf(" Principals: ");
1837 if (key->cert->nprincipals == 0)
1838 printf("(none)\n");
1839 else {
1840 for (i = 0; i < key->cert->nprincipals; i++)
1841 printf("\n %s",
1842 key->cert->principals[i]);
1843 printf("\n");
1844 }
1845 printf(" Critical Options: ");
1846 if (buffer_len(&key->cert->critical) == 0)
1847 printf("(none)\n");
1848 else {
1849 printf("\n");
1850 show_options(&key->cert->critical, v00, 1);
1851 }
1852 if (!v00) {
1853 printf(" Extensions: ");
1854 if (buffer_len(&key->cert->extensions) == 0)
1855 printf("(none)\n");
1856 else {
1857 printf("\n");
1858 show_options(&key->cert->extensions, v00, 0);
1859 }
1860 }
1861 exit(0);
1862 }
1863
1864 static void
1865 usage(void)
1866 {
1867 fprintf(stderr, "usage: %s [options]\n", __progname);
1868 fprintf(stderr, "Options:\n");
1869 fprintf(stderr, " -A Generate non-existent host keys for all key types.\n");
1870 fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n");
1871 fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
1872 fprintf(stderr, " -b bits Number of bits in the key to create.\n");
1873 fprintf(stderr, " -C comment Provide new comment.\n");
1874 fprintf(stderr, " -c Change comment in private and public key files.\n");
1875 #ifdef ENABLE_PKCS11
1876 fprintf(stderr, " -D pkcs11 Download public key from pkcs11 token.\n");
1877 #endif
1878 fprintf(stderr, " -e Export OpenSSH to foreign format key file.\n");
1879 fprintf(stderr, " -F hostname Find hostname in known hosts file.\n");
1880 fprintf(stderr, " -f filename Filename of the key file.\n");
1881 fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n");
1882 fprintf(stderr, " -g Use generic DNS resource record format.\n");
1883 fprintf(stderr, " -H Hash names in known_hosts file.\n");
1884 fprintf(stderr, " -h Generate host certificate instead of a user certificate.\n");
1885 fprintf(stderr, " -I key_id Key identifier to include in certificate.\n");
1886 fprintf(stderr, " -i Import foreign format to OpenSSH key file.\n");
1887 fprintf(stderr, " -L Print the contents of a certificate.\n");
1888 fprintf(stderr, " -l Show fingerprint of key file.\n");
1889 fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n");
1890 fprintf(stderr, " -m key_fmt Conversion format for -e/-i (PEM|PKCS8|RFC4716).\n");
1891 fprintf(stderr, " -N phrase Provide new passphrase.\n");
1892 fprintf(stderr, " -n name,... User/host principal names to include in certificate\n");
1893 fprintf(stderr, " -O option Specify a certificate option.\n");
1894 fprintf(stderr, " -P phrase Provide old passphrase.\n");
1895 fprintf(stderr, " -p Change passphrase of private key file.\n");
1896 fprintf(stderr, " -q Quiet.\n");
1897 fprintf(stderr, " -R hostname Remove host from known_hosts file.\n");
1898 fprintf(stderr, " -r hostname Print DNS resource record.\n");
1899 fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n");
1900 fprintf(stderr, " -s ca_key Certify keys with CA key.\n");
1901 fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n");
1902 fprintf(stderr, " -t type Specify type of key to create.\n");
1903 fprintf(stderr, " -V from:to Specify certificate validity interval.\n");
1904 fprintf(stderr, " -v Verbose.\n");
1905 fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n");
1906 fprintf(stderr, " -y Read private key file and print public key.\n");
1907 fprintf(stderr, " -z serial Specify a serial number.\n");
1908
1909 exit(1);
1910 }
1911
1912 /*
1913 * Main program for key management.
1914 */
1915 int
1916 main(int argc, char **argv)
1917 {
1918 char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1919 char out_file[MAXPATHLEN], *rr_hostname = NULL;
1920 Key *private, *public;
1921 struct passwd *pw;
1922 struct stat st;
1923 int opt, type, fd;
1924 u_int32_t memory = 0, generator_wanted = 0, trials = 100;
1925 int do_gen_candidates = 0, do_screen_candidates = 0;
1926 int gen_all_hostkeys = 0;
1927 BIGNUM *start = NULL;
1928 FILE *f;
1929 const char *errstr;
1930
1931 extern int optind;
1932 extern char *optarg;
1933
1934 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
1935 sanitise_stdfd();
1936
1937 __progname = ssh_get_progname(argv[0]);
1938
1939 OpenSSL_add_all_algorithms();
1940 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1941
1942 seed_rng();
1943
1944 /* we need this for the home * directory. */
1945 pw = getpwuid(getuid());
1946 if (!pw) {
1947 printf("You don't exist, go away!\n");
1948 exit(1);
1949 }
1950 if (gethostname(hostname, sizeof(hostname)) < 0) {
1951 perror("gethostname");
1952 exit(1);
1953 }
1954
1955 while ((opt = getopt(argc, argv, "AegiqpclBHLhvxXyF:b:f:t:D:I:P:m:N:n:"
1956 "O:C:r:g:R:T:G:M:S:s:a:V:W:z:")) != -1) {
1957 switch (opt) {
1958 case 'A':
1959 gen_all_hostkeys = 1;
1960 break;
1961 case 'b':
1962 bits = (u_int32_t)strtonum(optarg, 256, 32768, &errstr);
1963 if (errstr)
1964 fatal("Bits has bad value %s (%s)",
1965 optarg, errstr);
1966 break;
1967 case 'F':
1968 find_host = 1;
1969 rr_hostname = optarg;
1970 break;
1971 case 'H':
1972 hash_hosts = 1;
1973 break;
1974 case 'I':
1975 cert_key_id = optarg;
1976 break;
1977 case 'R':
1978 delete_host = 1;
1979 rr_hostname = optarg;
1980 break;
1981 case 'L':
1982 show_cert = 1;
1983 break;
1984 case 'l':
1985 print_fingerprint = 1;
1986 break;
1987 case 'B':
1988 print_bubblebabble = 1;
1989 break;
1990 case 'm':
1991 if (strcasecmp(optarg, "RFC4716") == 0 ||
1992 strcasecmp(optarg, "ssh2") == 0) {
1993 convert_format = FMT_RFC4716;
1994 break;
1995 }
1996 if (strcasecmp(optarg, "PKCS8") == 0) {
1997 convert_format = FMT_PKCS8;
1998 break;
1999 }
2000 if (strcasecmp(optarg, "PEM") == 0) {
2001 convert_format = FMT_PEM;
2002 break;
2003 }
2004 fatal("Unsupported conversion format \"%s\"", optarg);
2005 case 'n':
2006 cert_principals = optarg;
2007 break;
2008 case 'p':
2009 change_passphrase = 1;
2010 break;
2011 case 'c':
2012 change_comment = 1;
2013 break;
2014 case 'f':
2015 if (strlcpy(identity_file, optarg, sizeof(identity_file)) >=
2016 sizeof(identity_file))
2017 fatal("Identity filename too long");
2018 have_identity = 1;
2019 break;
2020 case 'g':
2021 print_generic = 1;
2022 break;
2023 case 'P':
2024 identity_passphrase = optarg;
2025 break;
2026 case 'N':
2027 identity_new_passphrase = optarg;
2028 break;
2029 case 'O':
2030 add_cert_option(optarg);
2031 break;
2032 case 'C':
2033 identity_comment = optarg;
2034 break;
2035 case 'q':
2036 quiet = 1;
2037 break;
2038 case 'e':
2039 case 'x':
2040 /* export key */
2041 convert_to = 1;
2042 break;
2043 case 'h':
2044 cert_key_type = SSH2_CERT_TYPE_HOST;
2045 certflags_flags = 0;
2046 break;
2047 case 'i':
2048 case 'X':
2049 /* import key */
2050 convert_from = 1;
2051 break;
2052 case 'y':
2053 print_public = 1;
2054 break;
2055 case 's':
2056 ca_key_path = optarg;
2057 break;
2058 case 't':
2059 key_type_name = optarg;
2060 break;
2061 case 'D':
2062 pkcs11provider = optarg;
2063 break;
2064 case 'v':
2065 if (log_level == SYSLOG_LEVEL_INFO)
2066 log_level = SYSLOG_LEVEL_DEBUG1;
2067 else {
2068 if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
2069 log_level < SYSLOG_LEVEL_DEBUG3)
2070 log_level++;
2071 }
2072 break;
2073 case 'r':
2074 rr_hostname = optarg;
2075 break;
2076 case 'W':
2077 generator_wanted = (u_int32_t)strtonum(optarg, 1,
2078 UINT_MAX, &errstr);
2079 if (errstr)
2080 fatal("Desired generator has bad value: %s (%s)",
2081 optarg, errstr);
2082 break;
2083 case 'a':
2084 trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
2085 if (errstr)
2086 fatal("Invalid number of trials: %s (%s)",
2087 optarg, errstr);
2088 break;
2089 case 'M':
2090 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
2091 if (errstr)
2092 fatal("Memory limit is %s: %s", errstr, optarg);
2093 break;
2094 case 'G':
2095 do_gen_candidates = 1;
2096 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
2097 sizeof(out_file))
2098 fatal("Output filename too long");
2099 break;
2100 case 'T':
2101 do_screen_candidates = 1;
2102 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
2103 sizeof(out_file))
2104 fatal("Output filename too long");
2105 break;
2106 case 'S':
2107 /* XXX - also compare length against bits */
2108 if (BN_hex2bn(&start, optarg) == 0)
2109 fatal("Invalid start point.");
2110 break;
2111 case 'V':
2112 parse_cert_times(optarg);
2113 break;
2114 case 'z':
2115 cert_serial = strtonum(optarg, 0, LLONG_MAX, &errstr);
2116 if (errstr)
2117 fatal("Invalid serial number: %s", errstr);
2118 break;
2119 case '?':
2120 default:
2121 usage();
2122 }
2123 }
2124
2125 /* reinit */
2126 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
2127
2128 argv += optind;
2129 argc -= optind;
2130
2131 if (ca_key_path != NULL) {
2132 if (argc < 1) {
2133 printf("Too few arguments.\n");
2134 usage();
2135 }
2136 } else if (argc > 0) {
2137 printf("Too many arguments.\n");
2138 usage();
2139 }
2140 if (change_passphrase && change_comment) {
2141 printf("Can only have one of -p and -c.\n");
2142 usage();
2143 }
2144 if (print_fingerprint && (delete_host || hash_hosts)) {
2145 printf("Cannot use -l with -D or -R.\n");
2146 usage();
2147 }
2148 if (ca_key_path != NULL) {
2149 if (cert_key_id == NULL)
2150 fatal("Must specify key id (-I) when certifying");
2151 do_ca_sign(pw, argc, argv);
2152 }
2153 if (show_cert)
2154 do_show_cert(pw);
2155 if (delete_host || hash_hosts || find_host)
2156 do_known_hosts(pw, rr_hostname);
2157 if (print_fingerprint || print_bubblebabble)
2158 do_fingerprint(pw);
2159 if (change_passphrase)
2160 do_change_passphrase(pw);
2161 if (change_comment)
2162 do_change_comment(pw);
2163 if (convert_to)
2164 do_convert_to(pw);
2165 if (convert_from)
2166 do_convert_from(pw);
2167 if (print_public)
2168 do_print_public(pw);
2169 if (rr_hostname != NULL) {
2170 unsigned int n = 0;
2171
2172 if (have_identity) {
2173 n = do_print_resource_record(pw,
2174 identity_file, rr_hostname);
2175 if (n == 0) {
2176 perror(identity_file);
2177 exit(1);
2178 }
2179 exit(0);
2180 } else {
2181
2182 n += do_print_resource_record(pw,
2183 _PATH_HOST_RSA_KEY_FILE, rr_hostname);
2184 n += do_print_resource_record(pw,
2185 _PATH_HOST_DSA_KEY_FILE, rr_hostname);
2186
2187 if (n == 0)
2188 fatal("no keys found.");
2189 exit(0);
2190 }
2191 }
2192 if (pkcs11provider != NULL)
2193 do_download(pw);
2194
2195 if (do_gen_candidates) {
2196 FILE *out = fopen(out_file, "w");
2197
2198 if (out == NULL) {
2199 error("Couldn't open modulus candidate file \"%s\": %s",
2200 out_file, strerror(errno));
2201 return (1);
2202 }
2203 if (bits == 0)
2204 bits = DEFAULT_BITS;
2205 if (gen_candidates(out, memory, bits, start) != 0)
2206 fatal("modulus candidate generation failed");
2207
2208 return (0);
2209 }
2210
2211 if (do_screen_candidates) {
2212 FILE *in;
2213 FILE *out = fopen(out_file, "w");
2214
2215 if (have_identity && strcmp(identity_file, "-") != 0) {
2216 if ((in = fopen(identity_file, "r")) == NULL) {
2217 fatal("Couldn't open modulus candidate "
2218 "file \"%s\": %s", identity_file,
2219 strerror(errno));
2220 }
2221 } else
2222 in = stdin;
2223
2224 if (out == NULL) {
2225 fatal("Couldn't open moduli file \"%s\": %s",
2226 out_file, strerror(errno));
2227 }
2228 if (prime_test(in, out, trials, generator_wanted) != 0)
2229 fatal("modulus screening failed");
2230 return (0);
2231 }
2232
2233 if (gen_all_hostkeys) {
2234 do_gen_all_hostkeys(pw);
2235 return (0);
2236 }
2237
2238 arc4random_stir();
2239
2240 if (key_type_name == NULL)
2241 key_type_name = "rsa";
2242
2243 type = key_type_from_name(key_type_name);
2244 type_bits_valid(type, &bits);
2245
2246 if (!quiet)
2247 printf("Generating public/private %s key pair.\n", key_type_name);
2248 private = key_generate(type, bits);
2249 if (private == NULL) {
2250 fprintf(stderr, "key_generate failed\n");
2251 exit(1);
2252 }
2253 public = key_from_private(private);
2254
2255 if (!have_identity)
2256 ask_filename(pw, "Enter file in which to save the key");
2257
2258 /* Create ~/.ssh directory if it doesn't already exist. */
2259 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s",
2260 pw->pw_dir, _PATH_SSH_USER_DIR);
2261 if (strstr(identity_file, dotsshdir) != NULL) {
2262 if (stat(dotsshdir, &st) < 0) {
2263 if (errno != ENOENT) {
2264 error("Could not stat %s: %s", dotsshdir,
2265 strerror(errno));
2266 } else if (mkdir(dotsshdir, 0700) < 0) {
2267 error("Could not create directory '%s': %s",
2268 dotsshdir, strerror(errno));
2269 } else if (!quiet)
2270 printf("Created directory '%s'.\n", dotsshdir);
2271 }
2272 }
2273 /* If the file already exists, ask the user to confirm. */
2274 if (stat(identity_file, &st) >= 0) {
2275 char yesno[3];
2276 printf("%s already exists.\n", identity_file);
2277 printf("Overwrite (y/n)? ");
2278 fflush(stdout);
2279 if (fgets(yesno, sizeof(yesno), stdin) == NULL)
2280 exit(1);
2281 if (yesno[0] != 'y' && yesno[0] != 'Y')
2282 exit(1);
2283 }
2284 /* Ask for a passphrase (twice). */
2285 if (identity_passphrase)
2286 passphrase1 = xstrdup(identity_passphrase);
2287 else if (identity_new_passphrase)
2288 passphrase1 = xstrdup(identity_new_passphrase);
2289 else {
2290 passphrase_again:
2291 passphrase1 =
2292 read_passphrase("Enter passphrase (empty for no "
2293 "passphrase): ", RP_ALLOW_STDIN);
2294 passphrase2 = read_passphrase("Enter same passphrase again: ",
2295 RP_ALLOW_STDIN);
2296 if (strcmp(passphrase1, passphrase2) != 0) {
2297 /*
2298 * The passphrases do not match. Clear them and
2299 * retry.
2300 */
2301 memset(passphrase1, 0, strlen(passphrase1));
2302 memset(passphrase2, 0, strlen(passphrase2));
2303 xfree(passphrase1);
2304 xfree(passphrase2);
2305 printf("Passphrases do not match. Try again.\n");
2306 goto passphrase_again;
2307 }
2308 /* Clear the other copy of the passphrase. */
2309 memset(passphrase2, 0, strlen(passphrase2));
2310 xfree(passphrase2);
2311 }
2312
2313 if (identity_comment) {
2314 strlcpy(comment, identity_comment, sizeof(comment));
2315 } else {
2316 /* Create default comment field for the passphrase. */
2317 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
2318 }
2319
2320 /* Save the key with the given passphrase and comment. */
2321 if (!key_save_private(private, identity_file, passphrase1, comment)) {
2322 printf("Saving the key failed: %s.\n", identity_file);
2323 memset(passphrase1, 0, strlen(passphrase1));
2324 xfree(passphrase1);
2325 exit(1);
2326 }
2327 /* Clear the passphrase. */
2328 memset(passphrase1, 0, strlen(passphrase1));
2329 xfree(passphrase1);
2330
2331 /* Clear the private key and the random number generator. */
2332 key_free(private);
2333 arc4random_stir();
2334
2335 if (!quiet)
2336 printf("Your identification has been saved in %s.\n", identity_file);
2337
2338 strlcat(identity_file, ".pub", sizeof(identity_file));
2339 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
2340 if (fd == -1) {
2341 printf("Could not save your public key in %s\n", identity_file);
2342 exit(1);
2343 }
2344 f = fdopen(fd, "w");
2345 if (f == NULL) {
2346 printf("fdopen %s failed\n", identity_file);
2347 exit(1);
2348 }
2349 if (!key_write(public, f))
2350 fprintf(stderr, "write key failed\n");
2351 fprintf(f, " %s\n", comment);
2352 fclose(f);
2353
2354 if (!quiet) {
2355 char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
2356 char *ra = key_fingerprint(public, SSH_FP_MD5,
2357 SSH_FP_RANDOMART);
2358 printf("Your public key has been saved in %s.\n",
2359 identity_file);
2360 printf("The key fingerprint is:\n");
2361 printf("%s %s\n", fp, comment);
2362 printf("The key's randomart image is:\n");
2363 printf("%s\n", ra);
2364 xfree(ra);
2365 xfree(fp);
2366 }
2367
2368 key_free(public);
2369 exit(0);
2370 }
DragonFly BSD