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[dragonfly.git] / crypto / openssh / ssh-keygen.c
blob0bd5fc93af54e1bca93d7355e3d09e4673d08fef
1 /* $OpenBSD: ssh-keygen.c,v 1.290 2016/05/02 09:36:42 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
21 #ifdef WITH_OPENSSL
22 #include <openssl/evp.h>
23 #include <openssl/pem.h>
24 #include "openbsd-compat/openssl-compat.h"
25 #endif
26
27 #include <errno.h>
28 #include <fcntl.h>
29 #include <netdb.h>
30 #ifdef HAVE_PATHS_H
31 # include <paths.h>
32 #endif
33 #include <pwd.h>
34 #include <stdarg.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39 #include <limits.h>
40
41 #include "xmalloc.h"
42 #include "sshkey.h"
43 #include "rsa.h"
44 #include "authfile.h"
45 #include "uuencode.h"
46 #include "sshbuf.h"
47 #include "pathnames.h"
48 #include "log.h"
49 #include "misc.h"
50 #include "match.h"
51 #include "hostfile.h"
52 #include "dns.h"
53 #include "ssh.h"
54 #include "ssh2.h"
55 #include "ssherr.h"
56 #include "ssh-pkcs11.h"
57 #include "atomicio.h"
58 #include "krl.h"
59 #include "digest.h"
60
61 #ifdef WITH_OPENSSL
62 # define DEFAULT_KEY_TYPE_NAME "rsa"
63 #else
64 # define DEFAULT_KEY_TYPE_NAME "ed25519"
65 #endif
66
67 /* Number of bits in the RSA/DSA key. This value can be set on the command line. */
68 #define DEFAULT_BITS 2048
69 #define DEFAULT_BITS_DSA 1024
70 #define DEFAULT_BITS_ECDSA 256
71 u_int32_t bits = 0;
72
73 /*
74 * Flag indicating that we just want to change the passphrase. This can be
75 * set on the command line.
76 */
77 int change_passphrase = 0;
78
79 /*
80 * Flag indicating that we just want to change the comment. This can be set
81 * on the command line.
82 */
83 int change_comment = 0;
84
85 int quiet = 0;
86
87 int log_level = SYSLOG_LEVEL_INFO;
88
89 /* Flag indicating that we want to hash a known_hosts file */
90 int hash_hosts = 0;
91 /* Flag indicating that we want lookup a host in known_hosts file */
92 int find_host = 0;
93 /* Flag indicating that we want to delete a host from a known_hosts file */
94 int delete_host = 0;
95
96 /* Flag indicating that we want to show the contents of a certificate */
97 int show_cert = 0;
98
99 /* Flag indicating that we just want to see the key fingerprint */
100 int print_fingerprint = 0;
101 int print_bubblebabble = 0;
102
103 /* Hash algorithm to use for fingerprints. */
104 int fingerprint_hash = SSH_FP_HASH_DEFAULT;
105
106 /* The identity file name, given on the command line or entered by the user. */
107 char identity_file[1024];
108 int have_identity = 0;
109
110 /* This is set to the passphrase if given on the command line. */
111 char *identity_passphrase = NULL;
112
113 /* This is set to the new passphrase if given on the command line. */
114 char *identity_new_passphrase = NULL;
115
116 /* This is set to the new comment if given on the command line. */
117 char *identity_comment = NULL;
118
119 /* Path to CA key when certifying keys. */
120 char *ca_key_path = NULL;
121
122 /* Certificate serial number */
123 unsigned long long cert_serial = 0;
124
125 /* Key type when certifying */
126 u_int cert_key_type = SSH2_CERT_TYPE_USER;
127
128 /* "key ID" of signed key */
129 char *cert_key_id = NULL;
130
131 /* Comma-separated list of principal names for certifying keys */
132 char *cert_principals = NULL;
133
134 /* Validity period for certificates */
135 u_int64_t cert_valid_from = 0;
136 u_int64_t cert_valid_to = ~0ULL;
137
138 /* Certificate options */
139 #define CERTOPT_X_FWD (1)
140 #define CERTOPT_AGENT_FWD (1<<1)
141 #define CERTOPT_PORT_FWD (1<<2)
142 #define CERTOPT_PTY (1<<3)
143 #define CERTOPT_USER_RC (1<<4)
144 #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
145 CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
146 u_int32_t certflags_flags = CERTOPT_DEFAULT;
147 char *certflags_command = NULL;
148 char *certflags_src_addr = NULL;
149
150 /* Conversion to/from various formats */
151 int convert_to = 0;
152 int convert_from = 0;
153 enum {
154 FMT_RFC4716,
155 FMT_PKCS8,
156 FMT_PEM
157 } convert_format = FMT_RFC4716;
158 int print_public = 0;
159 int print_generic = 0;
160
161 char *key_type_name = NULL;
162
163 /* Load key from this PKCS#11 provider */
164 char *pkcs11provider = NULL;
165
166 /* Use new OpenSSH private key format when writing SSH2 keys instead of PEM */
167 int use_new_format = 0;
168
169 /* Cipher for new-format private keys */
170 char *new_format_cipher = NULL;
171
172 /*
173 * Number of KDF rounds to derive new format keys /
174 * number of primality trials when screening moduli.
175 */
176 int rounds = 0;
177
178 /* argv0 */
179 extern char *__progname;
180
181 char hostname[NI_MAXHOST];
182
183 #ifdef WITH_OPENSSL
184 /* moduli.c */
185 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
186 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long,
187 unsigned long);
188 #endif
189
190 static void
191 type_bits_valid(int type, const char *name, u_int32_t *bitsp)
192 {
193 #ifdef WITH_OPENSSL
194 u_int maxbits, nid;
195 #endif
196
197 if (type == KEY_UNSPEC)
198 fatal("unknown key type %s", key_type_name);
199 if (*bitsp == 0) {
200 #ifdef WITH_OPENSSL
201 if (type == KEY_DSA)
202 *bitsp = DEFAULT_BITS_DSA;
203 else if (type == KEY_ECDSA) {
204 if (name != NULL &&
205 (nid = sshkey_ecdsa_nid_from_name(name)) > 0)
206 *bitsp = sshkey_curve_nid_to_bits(nid);
207 if (*bitsp == 0)
208 *bitsp = DEFAULT_BITS_ECDSA;
209 } else
210 #endif
211 *bitsp = DEFAULT_BITS;
212 }
213 #ifdef WITH_OPENSSL
214 maxbits = (type == KEY_DSA) ?
215 OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS;
216 if (*bitsp > maxbits)
217 fatal("key bits exceeds maximum %d", maxbits);
218 if (type == KEY_DSA && *bitsp != 1024)
219 fatal("DSA keys must be 1024 bits");
220 else if (type != KEY_ECDSA && type != KEY_ED25519 && *bitsp < 1024)
221 fatal("Key must at least be 1024 bits");
222 else if (type == KEY_ECDSA && sshkey_ecdsa_bits_to_nid(*bitsp) == -1)
223 fatal("Invalid ECDSA key length - valid lengths are "
224 "256, 384 or 521 bits");
225 #endif
226 }
227
228 static void
229 ask_filename(struct passwd *pw, const char *prompt)
230 {
231 char buf[1024];
232 char *name = NULL;
233
234 if (key_type_name == NULL)
235 name = _PATH_SSH_CLIENT_ID_RSA;
236 else {
237 switch (sshkey_type_from_name(key_type_name)) {
238 case KEY_RSA1:
239 name = _PATH_SSH_CLIENT_IDENTITY;
240 break;
241 case KEY_DSA_CERT:
242 case KEY_DSA:
243 name = _PATH_SSH_CLIENT_ID_DSA;
244 break;
245 #ifdef OPENSSL_HAS_ECC
246 case KEY_ECDSA_CERT:
247 case KEY_ECDSA:
248 name = _PATH_SSH_CLIENT_ID_ECDSA;
249 break;
250 #endif
251 case KEY_RSA_CERT:
252 case KEY_RSA:
253 name = _PATH_SSH_CLIENT_ID_RSA;
254 break;
255 case KEY_ED25519:
256 case KEY_ED25519_CERT:
257 name = _PATH_SSH_CLIENT_ID_ED25519;
258 break;
259 default:
260 fatal("bad key type");
261 }
262 }
263 snprintf(identity_file, sizeof(identity_file),
264 "%s/%s", pw->pw_dir, name);
265 printf("%s (%s): ", prompt, identity_file);
266 fflush(stdout);
267 if (fgets(buf, sizeof(buf), stdin) == NULL)
268 exit(1);
269 buf[strcspn(buf, "\n")] = '\0';
270 if (strcmp(buf, "") != 0)
271 strlcpy(identity_file, buf, sizeof(identity_file));
272 have_identity = 1;
273 }
274
275 static struct sshkey *
276 load_identity(char *filename)
277 {
278 char *pass;
279 struct sshkey *prv;
280 int r;
281
282 if ((r = sshkey_load_private(filename, "", &prv, NULL)) == 0)
283 return prv;
284 if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
285 fatal("Load key \"%s\": %s", filename, ssh_err(r));
286 if (identity_passphrase)
287 pass = xstrdup(identity_passphrase);
288 else
289 pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN);
290 r = sshkey_load_private(filename, pass, &prv, NULL);
291 explicit_bzero(pass, strlen(pass));
292 free(pass);
293 if (r != 0)
294 fatal("Load key \"%s\": %s", filename, ssh_err(r));
295 return prv;
296 }
297
298 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
299 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
300 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
301 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
302
303 #ifdef WITH_OPENSSL
304 static void
305 do_convert_to_ssh2(struct passwd *pw, struct sshkey *k)
306 {
307 size_t len;
308 u_char *blob;
309 char comment[61];
310 int r;
311
312 if (k->type == KEY_RSA1)
313 fatal("version 1 keys are not supported");
314 if ((r = sshkey_to_blob(k, &blob, &len)) != 0)
315 fatal("key_to_blob failed: %s", ssh_err(r));
316 /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
317 snprintf(comment, sizeof(comment),
318 "%u-bit %s, converted by %s@%s from OpenSSH",
319 sshkey_size(k), sshkey_type(k),
320 pw->pw_name, hostname);
321
322 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
323 fprintf(stdout, "Comment: \"%s\"\n", comment);
324 dump_base64(stdout, blob, len);
325 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
326 sshkey_free(k);
327 free(blob);
328 exit(0);
329 }
330
331 static void
332 do_convert_to_pkcs8(struct sshkey *k)
333 {
334 switch (sshkey_type_plain(k->type)) {
335 case KEY_RSA1:
336 case KEY_RSA:
337 if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
338 fatal("PEM_write_RSA_PUBKEY failed");
339 break;
340 case KEY_DSA:
341 if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
342 fatal("PEM_write_DSA_PUBKEY failed");
343 break;
344 #ifdef OPENSSL_HAS_ECC
345 case KEY_ECDSA:
346 if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
347 fatal("PEM_write_EC_PUBKEY failed");
348 break;
349 #endif
350 default:
351 fatal("%s: unsupported key type %s", __func__, sshkey_type(k));
352 }
353 exit(0);
354 }
355
356 static void
357 do_convert_to_pem(struct sshkey *k)
358 {
359 switch (sshkey_type_plain(k->type)) {
360 case KEY_RSA1:
361 case KEY_RSA:
362 if (!PEM_write_RSAPublicKey(stdout, k->rsa))
363 fatal("PEM_write_RSAPublicKey failed");
364 break;
365 #if notyet /* OpenSSH 0.9.8 lacks this function */
366 case KEY_DSA:
367 if (!PEM_write_DSAPublicKey(stdout, k->dsa))
368 fatal("PEM_write_DSAPublicKey failed");
369 break;
370 #endif
371 /* XXX ECDSA? */
372 default:
373 fatal("%s: unsupported key type %s", __func__, sshkey_type(k));
374 }
375 exit(0);
376 }
377
378 static void
379 do_convert_to(struct passwd *pw)
380 {
381 struct sshkey *k;
382 struct stat st;
383 int r;
384
385 if (!have_identity)
386 ask_filename(pw, "Enter file in which the key is");
387 if (stat(identity_file, &st) < 0)
388 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
389 if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0)
390 k = load_identity(identity_file);
391 switch (convert_format) {
392 case FMT_RFC4716:
393 do_convert_to_ssh2(pw, k);
394 break;
395 case FMT_PKCS8:
396 do_convert_to_pkcs8(k);
397 break;
398 case FMT_PEM:
399 do_convert_to_pem(k);
400 break;
401 default:
402 fatal("%s: unknown key format %d", __func__, convert_format);
403 }
404 exit(0);
405 }
406
407 /*
408 * This is almost exactly the bignum1 encoding, but with 32 bit for length
409 * instead of 16.
410 */
411 static void
412 buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value)
413 {
414 u_int bytes, bignum_bits;
415 int r;
416
417 if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0)
418 fatal("%s: buffer error: %s", __func__, ssh_err(r));
419 bytes = (bignum_bits + 7) / 8;
420 if (sshbuf_len(b) < bytes)
421 fatal("%s: input buffer too small: need %d have %zu",
422 __func__, bytes, sshbuf_len(b));
423 if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL)
424 fatal("%s: BN_bin2bn failed", __func__);
425 if ((r = sshbuf_consume(b, bytes)) != 0)
426 fatal("%s: buffer error: %s", __func__, ssh_err(r));
427 }
428
429 static struct sshkey *
430 do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
431 {
432 struct sshbuf *b;
433 struct sshkey *key = NULL;
434 char *type, *cipher;
435 u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345";
436 int r, rlen, ktype;
437 u_int magic, i1, i2, i3, i4;
438 size_t slen;
439 u_long e;
440
441 if ((b = sshbuf_from(blob, blen)) == NULL)
442 fatal("%s: sshbuf_from failed", __func__);
443 if ((r = sshbuf_get_u32(b, &magic)) != 0)
444 fatal("%s: buffer error: %s", __func__, ssh_err(r));
445
446 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
447 error("bad magic 0x%x != 0x%x", magic,
448 SSH_COM_PRIVATE_KEY_MAGIC);
449 sshbuf_free(b);
450 return NULL;
451 }
452 if ((r = sshbuf_get_u32(b, &i1)) != 0 ||
453 (r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
454 (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 ||
455 (r = sshbuf_get_u32(b, &i2)) != 0 ||
456 (r = sshbuf_get_u32(b, &i3)) != 0 ||
457 (r = sshbuf_get_u32(b, &i4)) != 0)
458 fatal("%s: buffer error: %s", __func__, ssh_err(r));
459 debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
460 if (strcmp(cipher, "none") != 0) {
461 error("unsupported cipher %s", cipher);
462 free(cipher);
463 sshbuf_free(b);
464 free(type);
465 return NULL;
466 }
467 free(cipher);
468
469 if (strstr(type, "dsa")) {
470 ktype = KEY_DSA;
471 } else if (strstr(type, "rsa")) {
472 ktype = KEY_RSA;
473 } else {
474 sshbuf_free(b);
475 free(type);
476 return NULL;
477 }
478 if ((key = sshkey_new_private(ktype)) == NULL)
479 fatal("key_new_private failed");
480 free(type);
481
482 switch (key->type) {
483 case KEY_DSA:
484 buffer_get_bignum_bits(b, key->dsa->p);
485 buffer_get_bignum_bits(b, key->dsa->g);
486 buffer_get_bignum_bits(b, key->dsa->q);
487 buffer_get_bignum_bits(b, key->dsa->pub_key);
488 buffer_get_bignum_bits(b, key->dsa->priv_key);
489 break;
490 case KEY_RSA:
491 if ((r = sshbuf_get_u8(b, &e1)) != 0 ||
492 (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) ||
493 (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0))
494 fatal("%s: buffer error: %s", __func__, ssh_err(r));
495 e = e1;
496 debug("e %lx", e);
497 if (e < 30) {
498 e <<= 8;
499 e += e2;
500 debug("e %lx", e);
501 e <<= 8;
502 e += e3;
503 debug("e %lx", e);
504 }
505 if (!BN_set_word(key->rsa->e, e)) {
506 sshbuf_free(b);
507 sshkey_free(key);
508 return NULL;
509 }
510 buffer_get_bignum_bits(b, key->rsa->d);
511 buffer_get_bignum_bits(b, key->rsa->n);
512 buffer_get_bignum_bits(b, key->rsa->iqmp);
513 buffer_get_bignum_bits(b, key->rsa->q);
514 buffer_get_bignum_bits(b, key->rsa->p);
515 if ((r = rsa_generate_additional_parameters(key->rsa)) != 0)
516 fatal("generate RSA parameters failed: %s", ssh_err(r));
517 break;
518 }
519 rlen = sshbuf_len(b);
520 if (rlen != 0)
521 error("do_convert_private_ssh2_from_blob: "
522 "remaining bytes in key blob %d", rlen);
523 sshbuf_free(b);
524
525 /* try the key */
526 if (sshkey_sign(key, &sig, &slen, data, sizeof(data), NULL, 0) != 0 ||
527 sshkey_verify(key, sig, slen, data, sizeof(data), 0) != 0) {
528 sshkey_free(key);
529 free(sig);
530 return NULL;
531 }
532 free(sig);
533 return key;
534 }
535
536 static int
537 get_line(FILE *fp, char *line, size_t len)
538 {
539 int c;
540 size_t pos = 0;
541
542 line[0] = '\0';
543 while ((c = fgetc(fp)) != EOF) {
544 if (pos >= len - 1)
545 fatal("input line too long.");
546 switch (c) {
547 case '\r':
548 c = fgetc(fp);
549 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF)
550 fatal("unget: %s", strerror(errno));
551 return pos;
552 case '\n':
553 return pos;
554 }
555 line[pos++] = c;
556 line[pos] = '\0';
557 }
558 /* We reached EOF */
559 return -1;
560 }
561
562 static void
563 do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private)
564 {
565 int r, blen, escaped = 0;
566 u_int len;
567 char line[1024];
568 u_char blob[8096];
569 char encoded[8096];
570 FILE *fp;
571
572 if ((fp = fopen(identity_file, "r")) == NULL)
573 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
574 encoded[0] = '\0';
575 while ((blen = get_line(fp, line, sizeof(line))) != -1) {
576 if (blen > 0 && line[blen - 1] == '\\')
577 escaped++;
578 if (strncmp(line, "----", 4) == 0 ||
579 strstr(line, ": ") != NULL) {
580 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
581 *private = 1;
582 if (strstr(line, " END ") != NULL) {
583 break;
584 }
585 /* fprintf(stderr, "ignore: %s", line); */
586 continue;
587 }
588 if (escaped) {
589 escaped--;
590 /* fprintf(stderr, "escaped: %s", line); */
591 continue;
592 }
593 strlcat(encoded, line, sizeof(encoded));
594 }
595 len = strlen(encoded);
596 if (((len % 4) == 3) &&
597 (encoded[len-1] == '=') &&
598 (encoded[len-2] == '=') &&
599 (encoded[len-3] == '='))
600 encoded[len-3] = '\0';
601 blen = uudecode(encoded, blob, sizeof(blob));
602 if (blen < 0)
603 fatal("uudecode failed.");
604 if (*private)
605 *k = do_convert_private_ssh2_from_blob(blob, blen);
606 else if ((r = sshkey_from_blob(blob, blen, k)) != 0)
607 fatal("decode blob failed: %s", ssh_err(r));
608 fclose(fp);
609 }
610
611 static void
612 do_convert_from_pkcs8(struct sshkey **k, int *private)
613 {
614 EVP_PKEY *pubkey;
615 FILE *fp;
616
617 if ((fp = fopen(identity_file, "r")) == NULL)
618 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
619 if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
620 fatal("%s: %s is not a recognised public key format", __func__,
621 identity_file);
622 }
623 fclose(fp);
624 switch (EVP_PKEY_type(pubkey->type)) {
625 case EVP_PKEY_RSA:
626 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
627 fatal("sshkey_new failed");
628 (*k)->type = KEY_RSA;
629 (*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
630 break;
631 case EVP_PKEY_DSA:
632 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
633 fatal("sshkey_new failed");
634 (*k)->type = KEY_DSA;
635 (*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
636 break;
637 #ifdef OPENSSL_HAS_ECC
638 case EVP_PKEY_EC:
639 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
640 fatal("sshkey_new failed");
641 (*k)->type = KEY_ECDSA;
642 (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
643 (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);
644 break;
645 #endif
646 default:
647 fatal("%s: unsupported pubkey type %d", __func__,
648 EVP_PKEY_type(pubkey->type));
649 }
650 EVP_PKEY_free(pubkey);
651 return;
652 }
653
654 static void
655 do_convert_from_pem(struct sshkey **k, int *private)
656 {
657 FILE *fp;
658 RSA *rsa;
659 #ifdef notyet
660 DSA *dsa;
661 #endif
662
663 if ((fp = fopen(identity_file, "r")) == NULL)
664 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
665 if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
666 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
667 fatal("sshkey_new failed");
668 (*k)->type = KEY_RSA;
669 (*k)->rsa = rsa;
670 fclose(fp);
671 return;
672 }
673 #if notyet /* OpenSSH 0.9.8 lacks this function */
674 rewind(fp);
675 if ((dsa = PEM_read_DSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
676 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
677 fatal("sshkey_new failed");
678 (*k)->type = KEY_DSA;
679 (*k)->dsa = dsa;
680 fclose(fp);
681 return;
682 }
683 /* XXX ECDSA */
684 #endif
685 fatal("%s: unrecognised raw private key format", __func__);
686 }
687
688 static void
689 do_convert_from(struct passwd *pw)
690 {
691 struct sshkey *k = NULL;
692 int r, private = 0, ok = 0;
693 struct stat st;
694
695 if (!have_identity)
696 ask_filename(pw, "Enter file in which the key is");
697 if (stat(identity_file, &st) < 0)
698 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
699
700 switch (convert_format) {
701 case FMT_RFC4716:
702 do_convert_from_ssh2(pw, &k, &private);
703 break;
704 case FMT_PKCS8:
705 do_convert_from_pkcs8(&k, &private);
706 break;
707 case FMT_PEM:
708 do_convert_from_pem(&k, &private);
709 break;
710 default:
711 fatal("%s: unknown key format %d", __func__, convert_format);
712 }
713
714 if (!private) {
715 if ((r = sshkey_write(k, stdout)) == 0)
716 ok = 1;
717 if (ok)
718 fprintf(stdout, "\n");
719 } else {
720 switch (k->type) {
721 case KEY_DSA:
722 ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
723 NULL, 0, NULL, NULL);
724 break;
725 #ifdef OPENSSL_HAS_ECC
726 case KEY_ECDSA:
727 ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
728 NULL, 0, NULL, NULL);
729 break;
730 #endif
731 case KEY_RSA:
732 ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
733 NULL, 0, NULL, NULL);
734 break;
735 default:
736 fatal("%s: unsupported key type %s", __func__,
737 sshkey_type(k));
738 }
739 }
740
741 if (!ok)
742 fatal("key write failed");
743 sshkey_free(k);
744 exit(0);
745 }
746 #endif
747
748 static void
749 do_print_public(struct passwd *pw)
750 {
751 struct sshkey *prv;
752 struct stat st;
753 int r;
754
755 if (!have_identity)
756 ask_filename(pw, "Enter file in which the key is");
757 if (stat(identity_file, &st) < 0)
758 fatal("%s: %s", identity_file, strerror(errno));
759 prv = load_identity(identity_file);
760 if ((r = sshkey_write(prv, stdout)) != 0)
761 error("key_write failed: %s", ssh_err(r));
762 sshkey_free(prv);
763 fprintf(stdout, "\n");
764 exit(0);
765 }
766
767 static void
768 do_download(struct passwd *pw)
769 {
770 #ifdef ENABLE_PKCS11
771 struct sshkey **keys = NULL;
772 int i, nkeys;
773 enum sshkey_fp_rep rep;
774 int fptype;
775 char *fp, *ra;
776
777 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
778 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
779
780 pkcs11_init(0);
781 nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys);
782 if (nkeys <= 0)
783 fatal("cannot read public key from pkcs11");
784 for (i = 0; i < nkeys; i++) {
785 if (print_fingerprint) {
786 fp = sshkey_fingerprint(keys[i], fptype, rep);
787 ra = sshkey_fingerprint(keys[i], fingerprint_hash,
788 SSH_FP_RANDOMART);
789 if (fp == NULL || ra == NULL)
790 fatal("%s: sshkey_fingerprint fail", __func__);
791 printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]),
792 fp, sshkey_type(keys[i]));
793 if (log_level >= SYSLOG_LEVEL_VERBOSE)
794 printf("%s\n", ra);
795 free(ra);
796 free(fp);
797 } else {
798 (void) sshkey_write(keys[i], stdout); /* XXX check */
799 fprintf(stdout, "\n");
800 }
801 sshkey_free(keys[i]);
802 }
803 free(keys);
804 pkcs11_terminate();
805 exit(0);
806 #else
807 fatal("no pkcs11 support");
808 #endif /* ENABLE_PKCS11 */
809 }
810
811 static struct sshkey *
812 try_read_key(char **cpp)
813 {
814 struct sshkey *ret;
815 int r;
816
817 if ((ret = sshkey_new(KEY_RSA1)) == NULL)
818 fatal("sshkey_new failed");
819 /* Try RSA1 */
820 if ((r = sshkey_read(ret, cpp)) == 0)
821 return ret;
822 /* Try modern */
823 sshkey_free(ret);
824 if ((ret = sshkey_new(KEY_UNSPEC)) == NULL)
825 fatal("sshkey_new failed");
826 if ((r = sshkey_read(ret, cpp)) == 0)
827 return ret;
828 /* Not a key */
829 sshkey_free(ret);
830 return NULL;
831 }
832
833 static void
834 fingerprint_one_key(const struct sshkey *public, const char *comment)
835 {
836 char *fp = NULL, *ra = NULL;
837 enum sshkey_fp_rep rep;
838 int fptype;
839
840 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
841 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
842 fp = sshkey_fingerprint(public, fptype, rep);
843 ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);
844 if (fp == NULL || ra == NULL)
845 fatal("%s: sshkey_fingerprint failed", __func__);
846 printf("%u %s %s (%s)\n", sshkey_size(public), fp,
847 comment ? comment : "no comment", sshkey_type(public));
848 if (log_level >= SYSLOG_LEVEL_VERBOSE)
849 printf("%s\n", ra);
850 free(ra);
851 free(fp);
852 }
853
854 static void
855 fingerprint_private(const char *path)
856 {
857 struct stat st;
858 char *comment = NULL;
859 struct sshkey *public = NULL;
860 int r;
861
862 if (stat(identity_file, &st) < 0)
863 fatal("%s: %s", path, strerror(errno));
864 if ((r = sshkey_load_public(path, &public, &comment)) != 0) {
865 debug("load public \"%s\": %s", path, ssh_err(r));
866 if ((r = sshkey_load_private(path, NULL,
867 &public, &comment)) != 0) {
868 debug("load private \"%s\": %s", path, ssh_err(r));
869 fatal("%s is not a key file.", path);
870 }
871 }
872
873 fingerprint_one_key(public, comment);
874 sshkey_free(public);
875 free(comment);
876 }
877
878 static void
879 do_fingerprint(struct passwd *pw)
880 {
881 FILE *f;
882 struct sshkey *public = NULL;
883 char *comment = NULL, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES];
884 int i, invalid = 1;
885 const char *path;
886 u_long lnum = 0;
887
888 if (!have_identity)
889 ask_filename(pw, "Enter file in which the key is");
890 path = identity_file;
891
892 if (strcmp(identity_file, "-") == 0) {
893 f = stdin;
894 path = "(stdin)";
895 } else if ((f = fopen(path, "r")) == NULL)
896 fatal("%s: %s: %s", __progname, path, strerror(errno));
897
898 while (read_keyfile_line(f, path, line, sizeof(line), &lnum) == 0) {
899 cp = line;
900 cp[strcspn(cp, "\n")] = '\0';
901 /* Trim leading space and comments */
902 cp = line + strspn(line, " \t");
903 if (*cp == '#' || *cp == '\0')
904 continue;
905
906 /*
907 * Input may be plain keys, private keys, authorized_keys
908 * or known_hosts.
909 */
910
911 /*
912 * Try private keys first. Assume a key is private if
913 * "SSH PRIVATE KEY" appears on the first line and we're
914 * not reading from stdin (XXX support private keys on stdin).
915 */
916 if (lnum == 1 && strcmp(identity_file, "-") != 0 &&
917 strstr(cp, "PRIVATE KEY") != NULL) {
918 fclose(f);
919 fingerprint_private(path);
920 exit(0);
921 }
922
923 /*
924 * If it's not a private key, then this must be prepared to
925 * accept a public key prefixed with a hostname or options.
926 * Try a bare key first, otherwise skip the leading stuff.
927 */
928 if ((public = try_read_key(&cp)) == NULL) {
929 i = strtol(cp, &ep, 10);
930 if (i == 0 || ep == NULL ||
931 (*ep != ' ' && *ep != '\t')) {
932 int quoted = 0;
933
934 comment = cp;
935 for (; *cp && (quoted || (*cp != ' ' &&
936 *cp != '\t')); cp++) {
937 if (*cp == '\\' && cp[1] == '"')
938 cp++; /* Skip both */
939 else if (*cp == '"')
940 quoted = !quoted;
941 }
942 if (!*cp)
943 continue;
944 *cp++ = '\0';
945 }
946 }
947 /* Retry after parsing leading hostname/key options */
948 if (public == NULL && (public = try_read_key(&cp)) == NULL) {
949 debug("%s:%lu: not a public key", path, lnum);
950 continue;
951 }
952
953 /* Find trailing comment, if any */
954 for (; *cp == ' ' || *cp == '\t'; cp++)
955 ;
956 if (*cp != '\0' && *cp != '#')
957 comment = cp;
958
959 fingerprint_one_key(public, comment);
960 sshkey_free(public);
961 invalid = 0; /* One good key in the file is sufficient */
962 }
963 fclose(f);
964
965 if (invalid)
966 fatal("%s is not a public key file.", path);
967 exit(0);
968 }
969
970 static void
971 do_gen_all_hostkeys(struct passwd *pw)
972 {
973 struct {
974 char *key_type;
975 char *key_type_display;
976 char *path;
977 } key_types[] = {
978 #ifdef WITH_OPENSSL
979 #ifdef WITH_SSH1
980 { "rsa1", "RSA1", _PATH_HOST_KEY_FILE },
981 #endif /* WITH_SSH1 */
982 { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
983 { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE },
984 #ifdef OPENSSL_HAS_ECC
985 { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
986 #endif /* OPENSSL_HAS_ECC */
987 #endif /* WITH_OPENSSL */
988 { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE },
989 { NULL, NULL, NULL }
990 };
991
992 int first = 0;
993 struct stat st;
994 struct sshkey *private, *public;
995 char comment[1024];
996 int i, type, fd, r;
997 FILE *f;
998
999 for (i = 0; key_types[i].key_type; i++) {
1000 if (stat(key_types[i].path, &st) == 0)
1001 continue;
1002 if (errno != ENOENT) {
1003 error("Could not stat %s: %s", key_types[i].path,
1004 strerror(errno));
1005 first = 0;
1006 continue;
1007 }
1008
1009 if (first == 0) {
1010 first = 1;
1011 printf("%s: generating new host keys: ", __progname);
1012 }
1013 printf("%s ", key_types[i].key_type_display);
1014 fflush(stdout);
1015 type = sshkey_type_from_name(key_types[i].key_type);
1016 strlcpy(identity_file, key_types[i].path, sizeof(identity_file));
1017 bits = 0;
1018 type_bits_valid(type, NULL, &bits);
1019 if ((r = sshkey_generate(type, bits, &private)) != 0) {
1020 error("key_generate failed: %s", ssh_err(r));
1021 first = 0;
1022 continue;
1023 }
1024 if ((r = sshkey_from_private(private, &public)) != 0)
1025 fatal("sshkey_from_private failed: %s", ssh_err(r));
1026 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
1027 hostname);
1028 if ((r = sshkey_save_private(private, identity_file, "",
1029 comment, use_new_format, new_format_cipher, rounds)) != 0) {
1030 error("Saving key \"%s\" failed: %s",
1031 identity_file, ssh_err(r));
1032 sshkey_free(private);
1033 sshkey_free(public);
1034 first = 0;
1035 continue;
1036 }
1037 sshkey_free(private);
1038 strlcat(identity_file, ".pub", sizeof(identity_file));
1039 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1040 if (fd == -1) {
1041 error("Could not save your public key in %s",
1042 identity_file);
1043 sshkey_free(public);
1044 first = 0;
1045 continue;
1046 }
1047 f = fdopen(fd, "w");
1048 if (f == NULL) {
1049 error("fdopen %s failed", identity_file);
1050 close(fd);
1051 sshkey_free(public);
1052 first = 0;
1053 continue;
1054 }
1055 if ((r = sshkey_write(public, f)) != 0) {
1056 error("write key failed: %s", ssh_err(r));
1057 fclose(f);
1058 sshkey_free(public);
1059 first = 0;
1060 continue;
1061 }
1062 fprintf(f, " %s\n", comment);
1063 fclose(f);
1064 sshkey_free(public);
1065
1066 }
1067 if (first != 0)
1068 printf("\n");
1069 }
1070
1071 struct known_hosts_ctx {
1072 const char *host; /* Hostname searched for in find/delete case */
1073 FILE *out; /* Output file, stdout for find_hosts case */
1074 int has_unhashed; /* When hashing, original had unhashed hosts */
1075 int found_key; /* For find/delete, host was found */
1076 int invalid; /* File contained invalid items; don't delete */
1077 };
1078
1079 static int
1080 known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx)
1081 {
1082 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1083 char *hashed, *cp, *hosts, *ohosts;
1084 int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts);
1085
1086 switch (l->status) {
1087 case HKF_STATUS_OK:
1088 case HKF_STATUS_MATCHED:
1089 /*
1090 * Don't hash hosts already already hashed, with wildcard
1091 * characters or a CA/revocation marker.
1092 */
1093 if ((l->match & HKF_MATCH_HOST_HASHED) != 0 ||
1094 has_wild || l->marker != MRK_NONE) {
1095 fprintf(ctx->out, "%s\n", l->line);
1096 if (has_wild && !find_host) {
1097 logit("%s:%ld: ignoring host name "
1098 "with wildcard: %.64s", l->path,
1099 l->linenum, l->hosts);
1100 }
1101 return 0;
1102 }
1103 /*
1104 * Split any comma-separated hostnames from the host list,
1105 * hash and store separately.
1106 */
1107 ohosts = hosts = xstrdup(l->hosts);
1108 while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') {
1109 if ((hashed = host_hash(cp, NULL, 0)) == NULL)
1110 fatal("hash_host failed");
1111 fprintf(ctx->out, "%s %s\n", hashed, l->rawkey);
1112 ctx->has_unhashed = 1;
1113 }
1114 free(ohosts);
1115 return 0;
1116 case HKF_STATUS_INVALID:
1117 /* Retain invalid lines, but mark file as invalid. */
1118 ctx->invalid = 1;
1119 logit("%s:%ld: invalid line", l->path, l->linenum);
1120 /* FALLTHROUGH */
1121 default:
1122 fprintf(ctx->out, "%s\n", l->line);
1123 return 0;
1124 }
1125 /* NOTREACHED */
1126 return -1;
1127 }
1128
1129 static int
1130 known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx)
1131 {
1132 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1133 enum sshkey_fp_rep rep;
1134 int fptype;
1135 char *fp;
1136
1137 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
1138 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1139
1140 if (l->status == HKF_STATUS_MATCHED) {
1141 if (delete_host) {
1142 if (l->marker != MRK_NONE) {
1143 /* Don't remove CA and revocation lines */
1144 fprintf(ctx->out, "%s\n", l->line);
1145 } else {
1146 /*
1147 * Hostname matches and has no CA/revoke
1148 * marker, delete it by *not* writing the
1149 * line to ctx->out.
1150 */
1151 ctx->found_key = 1;
1152 if (!quiet)
1153 printf("# Host %s found: line %ld\n",
1154 ctx->host, l->linenum);
1155 }
1156 return 0;
1157 } else if (find_host) {
1158 ctx->found_key = 1;
1159 if (!quiet) {
1160 printf("# Host %s found: line %ld %s\n",
1161 ctx->host,
1162 l->linenum, l->marker == MRK_CA ? "CA" :
1163 (l->marker == MRK_REVOKE ? "REVOKED" : ""));
1164 }
1165 if (hash_hosts)
1166 known_hosts_hash(l, ctx);
1167 else if (print_fingerprint) {
1168 fp = sshkey_fingerprint(l->key, fptype, rep);
1169 printf("%s %s %s %s\n", ctx->host,
1170 sshkey_type(l->key), fp, l->comment);
1171 free(fp);
1172 } else
1173 fprintf(ctx->out, "%s\n", l->line);
1174 return 0;
1175 }
1176 } else if (delete_host) {
1177 /* Retain non-matching hosts when deleting */
1178 if (l->status == HKF_STATUS_INVALID) {
1179 ctx->invalid = 1;
1180 logit("%s:%ld: invalid line", l->path, l->linenum);
1181 }
1182 fprintf(ctx->out, "%s\n", l->line);
1183 }
1184 return 0;
1185 }
1186
1187 static void
1188 do_known_hosts(struct passwd *pw, const char *name)
1189 {
1190 char *cp, tmp[PATH_MAX], old[PATH_MAX];
1191 int r, fd, oerrno, inplace = 0;
1192 struct known_hosts_ctx ctx;
1193 u_int foreach_options;
1194
1195 if (!have_identity) {
1196 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
1197 if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
1198 sizeof(identity_file))
1199 fatal("Specified known hosts path too long");
1200 free(cp);
1201 have_identity = 1;
1202 }
1203
1204 memset(&ctx, 0, sizeof(ctx));
1205 ctx.out = stdout;
1206 ctx.host = name;
1207
1208 /*
1209 * Find hosts goes to stdout, hash and deletions happen in-place
1210 * A corner case is ssh-keygen -HF foo, which should go to stdout
1211 */
1212 if (!find_host && (hash_hosts || delete_host)) {
1213 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
1214 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
1215 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
1216 strlcat(old, ".old", sizeof(old)) >= sizeof(old))
1217 fatal("known_hosts path too long");
1218 umask(077);
1219 if ((fd = mkstemp(tmp)) == -1)
1220 fatal("mkstemp: %s", strerror(errno));
1221 if ((ctx.out = fdopen(fd, "w")) == NULL) {
1222 oerrno = errno;
1223 unlink(tmp);
1224 fatal("fdopen: %s", strerror(oerrno));
1225 }
1226 inplace = 1;
1227 }
1228
1229 /* XXX support identity_file == "-" for stdin */
1230 foreach_options = find_host ? HKF_WANT_MATCH : 0;
1231 foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0;
1232 if ((r = hostkeys_foreach(identity_file,
1233 hash_hosts ? known_hosts_hash : known_hosts_find_delete, &ctx,
1234 name, NULL, foreach_options)) != 0) {
1235 if (inplace)
1236 unlink(tmp);
1237 fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r));
1238 }
1239
1240 if (inplace)
1241 fclose(ctx.out);
1242
1243 if (ctx.invalid) {
1244 error("%s is not a valid known_hosts file.", identity_file);
1245 if (inplace) {
1246 error("Not replacing existing known_hosts "
1247 "file because of errors");
1248 unlink(tmp);
1249 }
1250 exit(1);
1251 } else if (delete_host && !ctx.found_key) {
1252 logit("Host %s not found in %s", name, identity_file);
1253 if (inplace)
1254 unlink(tmp);
1255 } else if (inplace) {
1256 /* Backup existing file */
1257 if (unlink(old) == -1 && errno != ENOENT)
1258 fatal("unlink %.100s: %s", old, strerror(errno));
1259 if (link(identity_file, old) == -1)
1260 fatal("link %.100s to %.100s: %s", identity_file, old,
1261 strerror(errno));
1262 /* Move new one into place */
1263 if (rename(tmp, identity_file) == -1) {
1264 error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
1265 strerror(errno));
1266 unlink(tmp);
1267 unlink(old);
1268 exit(1);
1269 }
1270
1271 printf("%s updated.\n", identity_file);
1272 printf("Original contents retained as %s\n", old);
1273 if (ctx.has_unhashed) {
1274 logit("WARNING: %s contains unhashed entries", old);
1275 logit("Delete this file to ensure privacy "
1276 "of hostnames");
1277 }
1278 }
1279
1280 exit (find_host && !ctx.found_key);
1281 }
1282
1283 /*
1284 * Perform changing a passphrase. The argument is the passwd structure
1285 * for the current user.
1286 */
1287 static void
1288 do_change_passphrase(struct passwd *pw)
1289 {
1290 char *comment;
1291 char *old_passphrase, *passphrase1, *passphrase2;
1292 struct stat st;
1293 struct sshkey *private;
1294 int r;
1295
1296 if (!have_identity)
1297 ask_filename(pw, "Enter file in which the key is");
1298 if (stat(identity_file, &st) < 0)
1299 fatal("%s: %s", identity_file, strerror(errno));
1300 /* Try to load the file with empty passphrase. */
1301 r = sshkey_load_private(identity_file, "", &private, &comment);
1302 if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
1303 if (identity_passphrase)
1304 old_passphrase = xstrdup(identity_passphrase);
1305 else
1306 old_passphrase =
1307 read_passphrase("Enter old passphrase: ",
1308 RP_ALLOW_STDIN);
1309 r = sshkey_load_private(identity_file, old_passphrase,
1310 &private, &comment);
1311 explicit_bzero(old_passphrase, strlen(old_passphrase));
1312 free(old_passphrase);
1313 if (r != 0)
1314 goto badkey;
1315 } else if (r != 0) {
1316 badkey:
1317 fatal("Failed to load key %s: %s", identity_file, ssh_err(r));
1318 }
1319 if (comment)
1320 printf("Key has comment '%s'\n", comment);
1321
1322 /* Ask the new passphrase (twice). */
1323 if (identity_new_passphrase) {
1324 passphrase1 = xstrdup(identity_new_passphrase);
1325 passphrase2 = NULL;
1326 } else {
1327 passphrase1 =
1328 read_passphrase("Enter new passphrase (empty for no "
1329 "passphrase): ", RP_ALLOW_STDIN);
1330 passphrase2 = read_passphrase("Enter same passphrase again: ",
1331 RP_ALLOW_STDIN);
1332
1333 /* Verify that they are the same. */
1334 if (strcmp(passphrase1, passphrase2) != 0) {
1335 explicit_bzero(passphrase1, strlen(passphrase1));
1336 explicit_bzero(passphrase2, strlen(passphrase2));
1337 free(passphrase1);
1338 free(passphrase2);
1339 printf("Pass phrases do not match. Try again.\n");
1340 exit(1);
1341 }
1342 /* Destroy the other copy. */
1343 explicit_bzero(passphrase2, strlen(passphrase2));
1344 free(passphrase2);
1345 }
1346
1347 /* Save the file using the new passphrase. */
1348 if ((r = sshkey_save_private(private, identity_file, passphrase1,
1349 comment, use_new_format, new_format_cipher, rounds)) != 0) {
1350 error("Saving key \"%s\" failed: %s.",
1351 identity_file, ssh_err(r));
1352 explicit_bzero(passphrase1, strlen(passphrase1));
1353 free(passphrase1);
1354 sshkey_free(private);
1355 free(comment);
1356 exit(1);
1357 }
1358 /* Destroy the passphrase and the copy of the key in memory. */
1359 explicit_bzero(passphrase1, strlen(passphrase1));
1360 free(passphrase1);
1361 sshkey_free(private); /* Destroys contents */
1362 free(comment);
1363
1364 printf("Your identification has been saved with the new passphrase.\n");
1365 exit(0);
1366 }
1367
1368 /*
1369 * Print the SSHFP RR.
1370 */
1371 static int
1372 do_print_resource_record(struct passwd *pw, char *fname, char *hname)
1373 {
1374 struct sshkey *public;
1375 char *comment = NULL;
1376 struct stat st;
1377 int r;
1378
1379 if (fname == NULL)
1380 fatal("%s: no filename", __func__);
1381 if (stat(fname, &st) < 0) {
1382 if (errno == ENOENT)
1383 return 0;
1384 fatal("%s: %s", fname, strerror(errno));
1385 }
1386 if ((r = sshkey_load_public(fname, &public, &comment)) != 0)
1387 fatal("Failed to read v2 public key from \"%s\": %s.",
1388 fname, ssh_err(r));
1389 export_dns_rr(hname, public, stdout, print_generic);
1390 sshkey_free(public);
1391 free(comment);
1392 return 1;
1393 }
1394
1395 /*
1396 * Change the comment of a private key file.
1397 */
1398 static void
1399 do_change_comment(struct passwd *pw)
1400 {
1401 char new_comment[1024], *comment, *passphrase;
1402 struct sshkey *private;
1403 struct sshkey *public;
1404 struct stat st;
1405 FILE *f;
1406 int r, fd;
1407
1408 if (!have_identity)
1409 ask_filename(pw, "Enter file in which the key is");
1410 if (stat(identity_file, &st) < 0)
1411 fatal("%s: %s", identity_file, strerror(errno));
1412 if ((r = sshkey_load_private(identity_file, "",
1413 &private, &comment)) == 0)
1414 passphrase = xstrdup("");
1415 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1416 fatal("Cannot load private key \"%s\": %s.",
1417 identity_file, ssh_err(r));
1418 else {
1419 if (identity_passphrase)
1420 passphrase = xstrdup(identity_passphrase);
1421 else if (identity_new_passphrase)
1422 passphrase = xstrdup(identity_new_passphrase);
1423 else
1424 passphrase = read_passphrase("Enter passphrase: ",
1425 RP_ALLOW_STDIN);
1426 /* Try to load using the passphrase. */
1427 if ((r = sshkey_load_private(identity_file, passphrase,
1428 &private, &comment)) != 0) {
1429 explicit_bzero(passphrase, strlen(passphrase));
1430 free(passphrase);
1431 fatal("Cannot load private key \"%s\": %s.",
1432 identity_file, ssh_err(r));
1433 }
1434 }
1435
1436 if (private->type != KEY_RSA1 && private->type != KEY_ED25519 &&
1437 !use_new_format) {
1438 error("Comments are only supported for RSA1 or keys stored in "
1439 "the new format (-o).");
1440 explicit_bzero(passphrase, strlen(passphrase));
1441 sshkey_free(private);
1442 exit(1);
1443 }
1444 printf("Key now has comment '%s'\n", comment);
1445
1446 if (identity_comment) {
1447 strlcpy(new_comment, identity_comment, sizeof(new_comment));
1448 } else {
1449 printf("Enter new comment: ");
1450 fflush(stdout);
1451 if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1452 explicit_bzero(passphrase, strlen(passphrase));
1453 sshkey_free(private);
1454 exit(1);
1455 }
1456 new_comment[strcspn(new_comment, "\n")] = '\0';
1457 }
1458
1459 /* Save the file using the new passphrase. */
1460 if ((r = sshkey_save_private(private, identity_file, passphrase,
1461 new_comment, use_new_format, new_format_cipher, rounds)) != 0) {
1462 error("Saving key \"%s\" failed: %s",
1463 identity_file, ssh_err(r));
1464 explicit_bzero(passphrase, strlen(passphrase));
1465 free(passphrase);
1466 sshkey_free(private);
1467 free(comment);
1468 exit(1);
1469 }
1470 explicit_bzero(passphrase, strlen(passphrase));
1471 free(passphrase);
1472 if ((r = sshkey_from_private(private, &public)) != 0)
1473 fatal("key_from_private failed: %s", ssh_err(r));
1474 sshkey_free(private);
1475
1476 strlcat(identity_file, ".pub", sizeof(identity_file));
1477 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1478 if (fd == -1)
1479 fatal("Could not save your public key in %s", identity_file);
1480 f = fdopen(fd, "w");
1481 if (f == NULL)
1482 fatal("fdopen %s failed: %s", identity_file, strerror(errno));
1483 if ((r = sshkey_write(public, f)) != 0)
1484 fatal("write key failed: %s", ssh_err(r));
1485 sshkey_free(public);
1486 fprintf(f, " %s\n", new_comment);
1487 fclose(f);
1488
1489 free(comment);
1490
1491 printf("The comment in your key file has been changed.\n");
1492 exit(0);
1493 }
1494
1495 static void
1496 add_flag_option(struct sshbuf *c, const char *name)
1497 {
1498 int r;
1499
1500 debug3("%s: %s", __func__, name);
1501 if ((r = sshbuf_put_cstring(c, name)) != 0 ||
1502 (r = sshbuf_put_string(c, NULL, 0)) != 0)
1503 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1504 }
1505
1506 static void
1507 add_string_option(struct sshbuf *c, const char *name, const char *value)
1508 {
1509 struct sshbuf *b;
1510 int r;
1511
1512 debug3("%s: %s=%s", __func__, name, value);
1513 if ((b = sshbuf_new()) == NULL)
1514 fatal("%s: sshbuf_new failed", __func__);
1515 if ((r = sshbuf_put_cstring(b, value)) != 0 ||
1516 (r = sshbuf_put_cstring(c, name)) != 0 ||
1517 (r = sshbuf_put_stringb(c, b)) != 0)
1518 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1519
1520 sshbuf_free(b);
1521 }
1522
1523 #define OPTIONS_CRITICAL 1
1524 #define OPTIONS_EXTENSIONS 2
1525 static void
1526 prepare_options_buf(struct sshbuf *c, int which)
1527 {
1528 sshbuf_reset(c);
1529 if ((which & OPTIONS_CRITICAL) != 0 &&
1530 certflags_command != NULL)
1531 add_string_option(c, "force-command", certflags_command);
1532 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1533 (certflags_flags & CERTOPT_X_FWD) != 0)
1534 add_flag_option(c, "permit-X11-forwarding");
1535 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1536 (certflags_flags & CERTOPT_AGENT_FWD) != 0)
1537 add_flag_option(c, "permit-agent-forwarding");
1538 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1539 (certflags_flags & CERTOPT_PORT_FWD) != 0)
1540 add_flag_option(c, "permit-port-forwarding");
1541 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1542 (certflags_flags & CERTOPT_PTY) != 0)
1543 add_flag_option(c, "permit-pty");
1544 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1545 (certflags_flags & CERTOPT_USER_RC) != 0)
1546 add_flag_option(c, "permit-user-rc");
1547 if ((which & OPTIONS_CRITICAL) != 0 &&
1548 certflags_src_addr != NULL)
1549 add_string_option(c, "source-address", certflags_src_addr);
1550 }
1551
1552 static struct sshkey *
1553 load_pkcs11_key(char *path)
1554 {
1555 #ifdef ENABLE_PKCS11
1556 struct sshkey **keys = NULL, *public, *private = NULL;
1557 int r, i, nkeys;
1558
1559 if ((r = sshkey_load_public(path, &public, NULL)) != 0)
1560 fatal("Couldn't load CA public key \"%s\": %s",
1561 path, ssh_err(r));
1562
1563 nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys);
1564 debug3("%s: %d keys", __func__, nkeys);
1565 if (nkeys <= 0)
1566 fatal("cannot read public key from pkcs11");
1567 for (i = 0; i < nkeys; i++) {
1568 if (sshkey_equal_public(public, keys[i])) {
1569 private = keys[i];
1570 continue;
1571 }
1572 sshkey_free(keys[i]);
1573 }
1574 free(keys);
1575 sshkey_free(public);
1576 return private;
1577 #else
1578 fatal("no pkcs11 support");
1579 #endif /* ENABLE_PKCS11 */
1580 }
1581
1582 static void
1583 do_ca_sign(struct passwd *pw, int argc, char **argv)
1584 {
1585 int r, i, fd;
1586 u_int n;
1587 struct sshkey *ca, *public;
1588 char valid[64], *otmp, *tmp, *cp, *out, *comment, **plist = NULL;
1589 FILE *f;
1590
1591 #ifdef ENABLE_PKCS11
1592 pkcs11_init(1);
1593 #endif
1594 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1595 if (pkcs11provider != NULL) {
1596 if ((ca = load_pkcs11_key(tmp)) == NULL)
1597 fatal("No PKCS#11 key matching %s found", ca_key_path);
1598 } else
1599 ca = load_identity(tmp);
1600 free(tmp);
1601
1602 if (key_type_name != NULL &&
1603 sshkey_type_from_name(key_type_name) != ca->type) {
1604 fatal("CA key type %s doesn't match specified %s",
1605 sshkey_ssh_name(ca), key_type_name);
1606 }
1607
1608 for (i = 0; i < argc; i++) {
1609 /* Split list of principals */
1610 n = 0;
1611 if (cert_principals != NULL) {
1612 otmp = tmp = xstrdup(cert_principals);
1613 plist = NULL;
1614 for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1615 plist = xreallocarray(plist, n + 1, sizeof(*plist));
1616 if (*(plist[n] = xstrdup(cp)) == '\0')
1617 fatal("Empty principal name");
1618 }
1619 free(otmp);
1620 }
1621
1622 tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1623 if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)
1624 fatal("%s: unable to open \"%s\": %s",
1625 __func__, tmp, ssh_err(r));
1626 if (public->type != KEY_RSA && public->type != KEY_DSA &&
1627 public->type != KEY_ECDSA && public->type != KEY_ED25519)
1628 fatal("%s: key \"%s\" type %s cannot be certified",
1629 __func__, tmp, sshkey_type(public));
1630
1631 /* Prepare certificate to sign */
1632 if ((r = sshkey_to_certified(public)) != 0)
1633 fatal("Could not upgrade key %s to certificate: %s",
1634 tmp, ssh_err(r));
1635 public->cert->type = cert_key_type;
1636 public->cert->serial = (u_int64_t)cert_serial;
1637 public->cert->key_id = xstrdup(cert_key_id);
1638 public->cert->nprincipals = n;
1639 public->cert->principals = plist;
1640 public->cert->valid_after = cert_valid_from;
1641 public->cert->valid_before = cert_valid_to;
1642 prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL);
1643 prepare_options_buf(public->cert->extensions,
1644 OPTIONS_EXTENSIONS);
1645 if ((r = sshkey_from_private(ca,
1646 &public->cert->signature_key)) != 0)
1647 fatal("key_from_private (ca key): %s", ssh_err(r));
1648
1649 if ((r = sshkey_certify(public, ca, key_type_name)) != 0)
1650 fatal("Couldn't certify key %s: %s", tmp, ssh_err(r));
1651
1652 if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1653 *cp = '\0';
1654 xasprintf(&out, "%s-cert.pub", tmp);
1655 free(tmp);
1656
1657 if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
1658 fatal("Could not open \"%s\" for writing: %s", out,
1659 strerror(errno));
1660 if ((f = fdopen(fd, "w")) == NULL)
1661 fatal("%s: fdopen: %s", __func__, strerror(errno));
1662 if ((r = sshkey_write(public, f)) != 0)
1663 fatal("Could not write certified key to %s: %s",
1664 out, ssh_err(r));
1665 fprintf(f, " %s\n", comment);
1666 fclose(f);
1667
1668 if (!quiet) {
1669 sshkey_format_cert_validity(public->cert,
1670 valid, sizeof(valid));
1671 logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1672 "valid %s", sshkey_cert_type(public),
1673 out, public->cert->key_id,
1674 (unsigned long long)public->cert->serial,
1675 cert_principals != NULL ? " for " : "",
1676 cert_principals != NULL ? cert_principals : "",
1677 valid);
1678 }
1679
1680 sshkey_free(public);
1681 free(out);
1682 }
1683 #ifdef ENABLE_PKCS11
1684 pkcs11_terminate();
1685 #endif
1686 exit(0);
1687 }
1688
1689 static u_int64_t
1690 parse_relative_time(const char *s, time_t now)
1691 {
1692 int64_t mul, secs;
1693
1694 mul = *s == '-' ? -1 : 1;
1695
1696 if ((secs = convtime(s + 1)) == -1)
1697 fatal("Invalid relative certificate time %s", s);
1698 if (mul == -1 && secs > now)
1699 fatal("Certificate time %s cannot be represented", s);
1700 return now + (u_int64_t)(secs * mul);
1701 }
1702
1703 static u_int64_t
1704 parse_absolute_time(const char *s)
1705 {
1706 struct tm tm;
1707 time_t tt;
1708 char buf[32], *fmt;
1709
1710 /*
1711 * POSIX strptime says "The application shall ensure that there
1712 * is white-space or other non-alphanumeric characters between
1713 * any two conversion specifications" so arrange things this way.
1714 */
1715 switch (strlen(s)) {
1716 case 8:
1717 fmt = "%Y-%m-%d";
1718 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6);
1719 break;
1720 case 14:
1721 fmt = "%Y-%m-%dT%H:%M:%S";
1722 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s",
1723 s, s + 4, s + 6, s + 8, s + 10, s + 12);
1724 break;
1725 default:
1726 fatal("Invalid certificate time format %s", s);
1727 }
1728
1729 memset(&tm, 0, sizeof(tm));
1730 if (strptime(buf, fmt, &tm) == NULL)
1731 fatal("Invalid certificate time %s", s);
1732 if ((tt = mktime(&tm)) < 0)
1733 fatal("Certificate time %s cannot be represented", s);
1734 return (u_int64_t)tt;
1735 }
1736
1737 static void
1738 parse_cert_times(char *timespec)
1739 {
1740 char *from, *to;
1741 time_t now = time(NULL);
1742 int64_t secs;
1743
1744 /* +timespec relative to now */
1745 if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1746 if ((secs = convtime(timespec + 1)) == -1)
1747 fatal("Invalid relative certificate life %s", timespec);
1748 cert_valid_to = now + secs;
1749 /*
1750 * Backdate certificate one minute to avoid problems on hosts
1751 * with poorly-synchronised clocks.
1752 */
1753 cert_valid_from = ((now - 59)/ 60) * 60;
1754 return;
1755 }
1756
1757 /*
1758 * from:to, where
1759 * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1760 * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1761 */
1762 from = xstrdup(timespec);
1763 to = strchr(from, ':');
1764 if (to == NULL || from == to || *(to + 1) == '\0')
1765 fatal("Invalid certificate life specification %s", timespec);
1766 *to++ = '\0';
1767
1768 if (*from == '-' || *from == '+')
1769 cert_valid_from = parse_relative_time(from, now);
1770 else
1771 cert_valid_from = parse_absolute_time(from);
1772
1773 if (*to == '-' || *to == '+')
1774 cert_valid_to = parse_relative_time(to, now);
1775 else
1776 cert_valid_to = parse_absolute_time(to);
1777
1778 if (cert_valid_to <= cert_valid_from)
1779 fatal("Empty certificate validity interval");
1780 free(from);
1781 }
1782
1783 static void
1784 add_cert_option(char *opt)
1785 {
1786 char *val;
1787
1788 if (strcasecmp(opt, "clear") == 0)
1789 certflags_flags = 0;
1790 else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1791 certflags_flags &= ~CERTOPT_X_FWD;
1792 else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1793 certflags_flags |= CERTOPT_X_FWD;
1794 else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1795 certflags_flags &= ~CERTOPT_AGENT_FWD;
1796 else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1797 certflags_flags |= CERTOPT_AGENT_FWD;
1798 else if (strcasecmp(opt, "no-port-forwarding") == 0)
1799 certflags_flags &= ~CERTOPT_PORT_FWD;
1800 else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1801 certflags_flags |= CERTOPT_PORT_FWD;
1802 else if (strcasecmp(opt, "no-pty") == 0)
1803 certflags_flags &= ~CERTOPT_PTY;
1804 else if (strcasecmp(opt, "permit-pty") == 0)
1805 certflags_flags |= CERTOPT_PTY;
1806 else if (strcasecmp(opt, "no-user-rc") == 0)
1807 certflags_flags &= ~CERTOPT_USER_RC;
1808 else if (strcasecmp(opt, "permit-user-rc") == 0)
1809 certflags_flags |= CERTOPT_USER_RC;
1810 else if (strncasecmp(opt, "force-command=", 14) == 0) {
1811 val = opt + 14;
1812 if (*val == '\0')
1813 fatal("Empty force-command option");
1814 if (certflags_command != NULL)
1815 fatal("force-command already specified");
1816 certflags_command = xstrdup(val);
1817 } else if (strncasecmp(opt, "source-address=", 15) == 0) {
1818 val = opt + 15;
1819 if (*val == '\0')
1820 fatal("Empty source-address option");
1821 if (certflags_src_addr != NULL)
1822 fatal("source-address already specified");
1823 if (addr_match_cidr_list(NULL, val) != 0)
1824 fatal("Invalid source-address list");
1825 certflags_src_addr = xstrdup(val);
1826 } else
1827 fatal("Unsupported certificate option \"%s\"", opt);
1828 }
1829
1830 static void
1831 show_options(struct sshbuf *optbuf, int in_critical)
1832 {
1833 char *name, *arg;
1834 struct sshbuf *options, *option = NULL;
1835 int r;
1836
1837 if ((options = sshbuf_fromb(optbuf)) == NULL)
1838 fatal("%s: sshbuf_fromb failed", __func__);
1839 while (sshbuf_len(options) != 0) {
1840 sshbuf_free(option);
1841 option = NULL;
1842 if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 ||
1843 (r = sshbuf_froms(options, &option)) != 0)
1844 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1845 printf(" %s", name);
1846 if (!in_critical &&
1847 (strcmp(name, "permit-X11-forwarding") == 0 ||
1848 strcmp(name, "permit-agent-forwarding") == 0 ||
1849 strcmp(name, "permit-port-forwarding") == 0 ||
1850 strcmp(name, "permit-pty") == 0 ||
1851 strcmp(name, "permit-user-rc") == 0))
1852 printf("\n");
1853 else if (in_critical &&
1854 (strcmp(name, "force-command") == 0 ||
1855 strcmp(name, "source-address") == 0)) {
1856 if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)
1857 fatal("%s: buffer error: %s",
1858 __func__, ssh_err(r));
1859 printf(" %s\n", arg);
1860 free(arg);
1861 } else {
1862 printf(" UNKNOWN OPTION (len %zu)\n",
1863 sshbuf_len(option));
1864 sshbuf_reset(option);
1865 }
1866 free(name);
1867 if (sshbuf_len(option) != 0)
1868 fatal("Option corrupt: extra data at end");
1869 }
1870 sshbuf_free(option);
1871 sshbuf_free(options);
1872 }
1873
1874 static void
1875 print_cert(struct sshkey *key)
1876 {
1877 char valid[64], *key_fp, *ca_fp;
1878 u_int i;
1879
1880 key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT);
1881 ca_fp = sshkey_fingerprint(key->cert->signature_key,
1882 fingerprint_hash, SSH_FP_DEFAULT);
1883 if (key_fp == NULL || ca_fp == NULL)
1884 fatal("%s: sshkey_fingerprint fail", __func__);
1885 sshkey_format_cert_validity(key->cert, valid, sizeof(valid));
1886
1887 printf(" Type: %s %s certificate\n", sshkey_ssh_name(key),
1888 sshkey_cert_type(key));
1889 printf(" Public key: %s %s\n", sshkey_type(key), key_fp);
1890 printf(" Signing CA: %s %s\n",
1891 sshkey_type(key->cert->signature_key), ca_fp);
1892 printf(" Key ID: \"%s\"\n", key->cert->key_id);
1893 printf(" Serial: %llu\n", (unsigned long long)key->cert->serial);
1894 printf(" Valid: %s\n", valid);
1895 printf(" Principals: ");
1896 if (key->cert->nprincipals == 0)
1897 printf("(none)\n");
1898 else {
1899 for (i = 0; i < key->cert->nprincipals; i++)
1900 printf("\n %s",
1901 key->cert->principals[i]);
1902 printf("\n");
1903 }
1904 printf(" Critical Options: ");
1905 if (sshbuf_len(key->cert->critical) == 0)
1906 printf("(none)\n");
1907 else {
1908 printf("\n");
1909 show_options(key->cert->critical, 1);
1910 }
1911 printf(" Extensions: ");
1912 if (sshbuf_len(key->cert->extensions) == 0)
1913 printf("(none)\n");
1914 else {
1915 printf("\n");
1916 show_options(key->cert->extensions, 0);
1917 }
1918 }
1919
1920 static void
1921 do_show_cert(struct passwd *pw)
1922 {
1923 struct sshkey *key = NULL;
1924 struct stat st;
1925 int r, is_stdin = 0, ok = 0;
1926 FILE *f;
1927 char *cp, line[SSH_MAX_PUBKEY_BYTES];
1928 const char *path;
1929 u_long lnum = 0;
1930
1931 if (!have_identity)
1932 ask_filename(pw, "Enter file in which the key is");
1933 if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) < 0)
1934 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1935
1936 path = identity_file;
1937 if (strcmp(path, "-") == 0) {
1938 f = stdin;
1939 path = "(stdin)";
1940 is_stdin = 1;
1941 } else if ((f = fopen(identity_file, "r")) == NULL)
1942 fatal("fopen %s: %s", identity_file, strerror(errno));
1943
1944 while (read_keyfile_line(f, path, line, sizeof(line), &lnum) == 0) {
1945 sshkey_free(key);
1946 key = NULL;
1947 /* Trim leading space and comments */
1948 cp = line + strspn(line, " \t");
1949 if (*cp == '#' || *cp == '\0')
1950 continue;
1951 if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1952 fatal("key_new");
1953 if ((r = sshkey_read(key, &cp)) != 0) {
1954 error("%s:%lu: invalid key: %s", path,
1955 lnum, ssh_err(r));
1956 continue;
1957 }
1958 if (!sshkey_is_cert(key)) {
1959 error("%s:%lu is not a certificate", path, lnum);
1960 continue;
1961 }
1962 ok = 1;
1963 if (!is_stdin && lnum == 1)
1964 printf("%s:\n", path);
1965 else
1966 printf("%s:%lu:\n", path, lnum);
1967 print_cert(key);
1968 }
1969 sshkey_free(key);
1970 fclose(f);
1971 exit(ok ? 0 : 1);
1972 }
1973
1974 static void
1975 load_krl(const char *path, struct ssh_krl **krlp)
1976 {
1977 struct sshbuf *krlbuf;
1978 int r, fd;
1979
1980 if ((krlbuf = sshbuf_new()) == NULL)
1981 fatal("sshbuf_new failed");
1982 if ((fd = open(path, O_RDONLY)) == -1)
1983 fatal("open %s: %s", path, strerror(errno));
1984 if ((r = sshkey_load_file(fd, krlbuf)) != 0)
1985 fatal("Unable to load KRL: %s", ssh_err(r));
1986 close(fd);
1987 /* XXX check sigs */
1988 if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 ||
1989 *krlp == NULL)
1990 fatal("Invalid KRL file: %s", ssh_err(r));
1991 sshbuf_free(krlbuf);
1992 }
1993
1994 static void
1995 update_krl_from_file(struct passwd *pw, const char *file, int wild_ca,
1996 const struct sshkey *ca, struct ssh_krl *krl)
1997 {
1998 struct sshkey *key = NULL;
1999 u_long lnum = 0;
2000 char *path, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES];
2001 unsigned long long serial, serial2;
2002 int i, was_explicit_key, was_sha1, r;
2003 FILE *krl_spec;
2004
2005 path = tilde_expand_filename(file, pw->pw_uid);
2006 if (strcmp(path, "-") == 0) {
2007 krl_spec = stdin;
2008 free(path);
2009 path = xstrdup("(standard input)");
2010 } else if ((krl_spec = fopen(path, "r")) == NULL)
2011 fatal("fopen %s: %s", path, strerror(errno));
2012
2013 if (!quiet)
2014 printf("Revoking from %s\n", path);
2015 while (read_keyfile_line(krl_spec, path, line, sizeof(line),
2016 &lnum) == 0) {
2017 was_explicit_key = was_sha1 = 0;
2018 cp = line + strspn(line, " \t");
2019 /* Trim trailing space, comments and strip \n */
2020 for (i = 0, r = -1; cp[i] != '\0'; i++) {
2021 if (cp[i] == '#' || cp[i] == '\n') {
2022 cp[i] = '\0';
2023 break;
2024 }
2025 if (cp[i] == ' ' || cp[i] == '\t') {
2026 /* Remember the start of a span of whitespace */
2027 if (r == -1)
2028 r = i;
2029 } else
2030 r = -1;
2031 }
2032 if (r != -1)
2033 cp[r] = '\0';
2034 if (*cp == '\0')
2035 continue;
2036 if (strncasecmp(cp, "serial:", 7) == 0) {
2037 if (ca == NULL && !wild_ca) {
2038 fatal("revoking certificates by serial number "
2039 "requires specification of a CA key");
2040 }
2041 cp += 7;
2042 cp = cp + strspn(cp, " \t");
2043 errno = 0;
2044 serial = strtoull(cp, &ep, 0);
2045 if (*cp == '\0' || (*ep != '\0' && *ep != '-'))
2046 fatal("%s:%lu: invalid serial \"%s\"",
2047 path, lnum, cp);
2048 if (errno == ERANGE && serial == ULLONG_MAX)
2049 fatal("%s:%lu: serial out of range",
2050 path, lnum);
2051 serial2 = serial;
2052 if (*ep == '-') {
2053 cp = ep + 1;
2054 errno = 0;
2055 serial2 = strtoull(cp, &ep, 0);
2056 if (*cp == '\0' || *ep != '\0')
2057 fatal("%s:%lu: invalid serial \"%s\"",
2058 path, lnum, cp);
2059 if (errno == ERANGE && serial2 == ULLONG_MAX)
2060 fatal("%s:%lu: serial out of range",
2061 path, lnum);
2062 if (serial2 <= serial)
2063 fatal("%s:%lu: invalid serial range "
2064 "%llu:%llu", path, lnum,
2065 (unsigned long long)serial,
2066 (unsigned long long)serial2);
2067 }
2068 if (ssh_krl_revoke_cert_by_serial_range(krl,
2069 ca, serial, serial2) != 0) {
2070 fatal("%s: revoke serial failed",
2071 __func__);
2072 }
2073 } else if (strncasecmp(cp, "id:", 3) == 0) {
2074 if (ca == NULL && !wild_ca) {
2075 fatal("revoking certificates by key ID "
2076 "requires specification of a CA key");
2077 }
2078 cp += 3;
2079 cp = cp + strspn(cp, " \t");
2080 if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)
2081 fatal("%s: revoke key ID failed", __func__);
2082 } else {
2083 if (strncasecmp(cp, "key:", 4) == 0) {
2084 cp += 4;
2085 cp = cp + strspn(cp, " \t");
2086 was_explicit_key = 1;
2087 } else if (strncasecmp(cp, "sha1:", 5) == 0) {
2088 cp += 5;
2089 cp = cp + strspn(cp, " \t");
2090 was_sha1 = 1;
2091 } else {
2092 /*
2093 * Just try to process the line as a key.
2094 * Parsing will fail if it isn't.
2095 */
2096 }
2097 if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
2098 fatal("key_new");
2099 if ((r = sshkey_read(key, &cp)) != 0)
2100 fatal("%s:%lu: invalid key: %s",
2101 path, lnum, ssh_err(r));
2102 if (was_explicit_key)
2103 r = ssh_krl_revoke_key_explicit(krl, key);
2104 else if (was_sha1)
2105 r = ssh_krl_revoke_key_sha1(krl, key);
2106 else
2107 r = ssh_krl_revoke_key(krl, key);
2108 if (r != 0)
2109 fatal("%s: revoke key failed: %s",
2110 __func__, ssh_err(r));
2111 sshkey_free(key);
2112 }
2113 }
2114 if (strcmp(path, "-") != 0)
2115 fclose(krl_spec);
2116 free(path);
2117 }
2118
2119 static void
2120 do_gen_krl(struct passwd *pw, int updating, int argc, char **argv)
2121 {
2122 struct ssh_krl *krl;
2123 struct stat sb;
2124 struct sshkey *ca = NULL;
2125 int fd, i, r, wild_ca = 0;
2126 char *tmp;
2127 struct sshbuf *kbuf;
2128
2129 if (*identity_file == '\0')
2130 fatal("KRL generation requires an output file");
2131 if (stat(identity_file, &sb) == -1) {
2132 if (errno != ENOENT)
2133 fatal("Cannot access KRL \"%s\": %s",
2134 identity_file, strerror(errno));
2135 if (updating)
2136 fatal("KRL \"%s\" does not exist", identity_file);
2137 }
2138 if (ca_key_path != NULL) {
2139 if (strcasecmp(ca_key_path, "none") == 0)
2140 wild_ca = 1;
2141 else {
2142 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
2143 if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
2144 fatal("Cannot load CA public key %s: %s",
2145 tmp, ssh_err(r));
2146 free(tmp);
2147 }
2148 }
2149
2150 if (updating)
2151 load_krl(identity_file, &krl);
2152 else if ((krl = ssh_krl_init()) == NULL)
2153 fatal("couldn't create KRL");
2154
2155 if (cert_serial != 0)
2156 ssh_krl_set_version(krl, cert_serial);
2157 if (identity_comment != NULL)
2158 ssh_krl_set_comment(krl, identity_comment);
2159
2160 for (i = 0; i < argc; i++)
2161 update_krl_from_file(pw, argv[i], wild_ca, ca, krl);
2162
2163 if ((kbuf = sshbuf_new()) == NULL)
2164 fatal("sshbuf_new failed");
2165 if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0)
2166 fatal("Couldn't generate KRL");
2167 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
2168 fatal("open %s: %s", identity_file, strerror(errno));
2169 if (atomicio(vwrite, fd, (void *)sshbuf_ptr(kbuf), sshbuf_len(kbuf)) !=
2170 sshbuf_len(kbuf))
2171 fatal("write %s: %s", identity_file, strerror(errno));
2172 close(fd);
2173 sshbuf_free(kbuf);
2174 ssh_krl_free(krl);
2175 sshkey_free(ca);
2176 }
2177
2178 static void
2179 do_check_krl(struct passwd *pw, int argc, char **argv)
2180 {
2181 int i, r, ret = 0;
2182 char *comment;
2183 struct ssh_krl *krl;
2184 struct sshkey *k;
2185
2186 if (*identity_file == '\0')
2187 fatal("KRL checking requires an input file");
2188 load_krl(identity_file, &krl);
2189 for (i = 0; i < argc; i++) {
2190 if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0)
2191 fatal("Cannot load public key %s: %s",
2192 argv[i], ssh_err(r));
2193 r = ssh_krl_check_key(krl, k);
2194 printf("%s%s%s%s: %s\n", argv[i],
2195 *comment ? " (" : "", comment, *comment ? ")" : "",
2196 r == 0 ? "ok" : "REVOKED");
2197 if (r != 0)
2198 ret = 1;
2199 sshkey_free(k);
2200 free(comment);
2201 }
2202 ssh_krl_free(krl);
2203 exit(ret);
2204 }
2205
2206 static void
2207 usage(void)
2208 {
2209 fprintf(stderr,
2210 "usage: ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa | rsa1]\n"
2211 " [-N new_passphrase] [-C comment] [-f output_keyfile]\n"
2212 " ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]\n"
2213 " ssh-keygen -i [-m key_format] [-f input_keyfile]\n"
2214 " ssh-keygen -e [-m key_format] [-f input_keyfile]\n"
2215 " ssh-keygen -y [-f input_keyfile]\n"
2216 " ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]\n"
2217 " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n"
2218 " ssh-keygen -B [-f input_keyfile]\n");
2219 #ifdef ENABLE_PKCS11
2220 fprintf(stderr,
2221 " ssh-keygen -D pkcs11\n");
2222 #endif
2223 fprintf(stderr,
2224 " ssh-keygen -F hostname [-f known_hosts_file] [-l]\n"
2225 " ssh-keygen -H [-f known_hosts_file]\n"
2226 " ssh-keygen -R hostname [-f known_hosts_file]\n"
2227 " ssh-keygen -r hostname [-f input_keyfile] [-g]\n"
2228 #ifdef WITH_OPENSSL
2229 " ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n"
2230 " ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]\n"
2231 " [-j start_line] [-K checkpt] [-W generator]\n"
2232 #endif
2233 " ssh-keygen -s ca_key -I certificate_identity [-h] [-n principals]\n"
2234 " [-O option] [-V validity_interval] [-z serial_number] file ...\n"
2235 " ssh-keygen -L [-f input_keyfile]\n"
2236 " ssh-keygen -A\n"
2237 " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n"
2238 " file ...\n"
2239 " ssh-keygen -Q -f krl_file file ...\n");
2240 exit(1);
2241 }
2242
2243 /*
2244 * Main program for key management.
2245 */
2246 int
2247 main(int argc, char **argv)
2248 {
2249 char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2;
2250 char *rr_hostname = NULL, *ep, *fp, *ra;
2251 struct sshkey *private, *public;
2252 struct passwd *pw;
2253 struct stat st;
2254 int r, opt, type, fd;
2255 int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;
2256 FILE *f;
2257 const char *errstr;
2258 #ifdef WITH_OPENSSL
2259 /* Moduli generation/screening */
2260 char out_file[PATH_MAX], *checkpoint = NULL;
2261 u_int32_t memory = 0, generator_wanted = 0;
2262 int do_gen_candidates = 0, do_screen_candidates = 0;
2263 unsigned long start_lineno = 0, lines_to_process = 0;
2264 BIGNUM *start = NULL;
2265 #endif
2266
2267 extern int optind;
2268 extern char *optarg;
2269
2270 ssh_malloc_init(); /* must be called before any mallocs */
2271 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
2272 sanitise_stdfd();
2273
2274 __progname = ssh_get_progname(argv[0]);
2275
2276 #ifdef WITH_OPENSSL
2277 OpenSSL_add_all_algorithms();
2278 #endif
2279 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
2280
2281 seed_rng();
2282
2283 /* we need this for the home * directory. */
2284 pw = getpwuid(getuid());
2285 if (!pw)
2286 fatal("No user exists for uid %lu", (u_long)getuid());
2287 if (gethostname(hostname, sizeof(hostname)) < 0)
2288 fatal("gethostname: %s", strerror(errno));
2289
2290 /* Remaining characters: UYdw */
2291 while ((opt = getopt(argc, argv, "ABHLQXceghiklopquvxy"
2292 "C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Z:"
2293 "a:b:f:g:j:m:n:r:s:t:z:")) != -1) {
2294 switch (opt) {
2295 case 'A':
2296 gen_all_hostkeys = 1;
2297 break;
2298 case 'b':
2299 bits = (u_int32_t)strtonum(optarg, 256, 32768, &errstr);
2300 if (errstr)
2301 fatal("Bits has bad value %s (%s)",
2302 optarg, errstr);
2303 break;
2304 case 'E':
2305 fingerprint_hash = ssh_digest_alg_by_name(optarg);
2306 if (fingerprint_hash == -1)
2307 fatal("Invalid hash algorithm \"%s\"", optarg);
2308 break;
2309 case 'F':
2310 find_host = 1;
2311 rr_hostname = optarg;
2312 break;
2313 case 'H':
2314 hash_hosts = 1;
2315 break;
2316 case 'I':
2317 cert_key_id = optarg;
2318 break;
2319 case 'R':
2320 delete_host = 1;
2321 rr_hostname = optarg;
2322 break;
2323 case 'L':
2324 show_cert = 1;
2325 break;
2326 case 'l':
2327 print_fingerprint = 1;
2328 break;
2329 case 'B':
2330 print_bubblebabble = 1;
2331 break;
2332 case 'm':
2333 if (strcasecmp(optarg, "RFC4716") == 0 ||
2334 strcasecmp(optarg, "ssh2") == 0) {
2335 convert_format = FMT_RFC4716;
2336 break;
2337 }
2338 if (strcasecmp(optarg, "PKCS8") == 0) {
2339 convert_format = FMT_PKCS8;
2340 break;
2341 }
2342 if (strcasecmp(optarg, "PEM") == 0) {
2343 convert_format = FMT_PEM;
2344 break;
2345 }
2346 fatal("Unsupported conversion format \"%s\"", optarg);
2347 case 'n':
2348 cert_principals = optarg;
2349 break;
2350 case 'o':
2351 use_new_format = 1;
2352 break;
2353 case 'p':
2354 change_passphrase = 1;
2355 break;
2356 case 'c':
2357 change_comment = 1;
2358 break;
2359 case 'f':
2360 if (strlcpy(identity_file, optarg,
2361 sizeof(identity_file)) >= sizeof(identity_file))
2362 fatal("Identity filename too long");
2363 have_identity = 1;
2364 break;
2365 case 'g':
2366 print_generic = 1;
2367 break;
2368 case 'P':
2369 identity_passphrase = optarg;
2370 break;
2371 case 'N':
2372 identity_new_passphrase = optarg;
2373 break;
2374 case 'Q':
2375 check_krl = 1;
2376 break;
2377 case 'O':
2378 add_cert_option(optarg);
2379 break;
2380 case 'Z':
2381 new_format_cipher = optarg;
2382 break;
2383 case 'C':
2384 identity_comment = optarg;
2385 break;
2386 case 'q':
2387 quiet = 1;
2388 break;
2389 case 'e':
2390 case 'x':
2391 /* export key */
2392 convert_to = 1;
2393 break;
2394 case 'h':
2395 cert_key_type = SSH2_CERT_TYPE_HOST;
2396 certflags_flags = 0;
2397 break;
2398 case 'k':
2399 gen_krl = 1;
2400 break;
2401 case 'i':
2402 case 'X':
2403 /* import key */
2404 convert_from = 1;
2405 break;
2406 case 'y':
2407 print_public = 1;
2408 break;
2409 case 's':
2410 ca_key_path = optarg;
2411 break;
2412 case 't':
2413 key_type_name = optarg;
2414 break;
2415 case 'D':
2416 pkcs11provider = optarg;
2417 break;
2418 case 'u':
2419 update_krl = 1;
2420 break;
2421 case 'v':
2422 if (log_level == SYSLOG_LEVEL_INFO)
2423 log_level = SYSLOG_LEVEL_DEBUG1;
2424 else {
2425 if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
2426 log_level < SYSLOG_LEVEL_DEBUG3)
2427 log_level++;
2428 }
2429 break;
2430 case 'r':
2431 rr_hostname = optarg;
2432 break;
2433 case 'a':
2434 rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr);
2435 if (errstr)
2436 fatal("Invalid number: %s (%s)",
2437 optarg, errstr);
2438 break;
2439 case 'V':
2440 parse_cert_times(optarg);
2441 break;
2442 case 'z':
2443 errno = 0;
2444 cert_serial = strtoull(optarg, &ep, 10);
2445 if (*optarg < '0' || *optarg > '9' || *ep != '\0' ||
2446 (errno == ERANGE && cert_serial == ULLONG_MAX))
2447 fatal("Invalid serial number \"%s\"", optarg);
2448 break;
2449 #ifdef WITH_OPENSSL
2450 /* Moduli generation/screening */
2451 case 'W':
2452 generator_wanted = (u_int32_t)strtonum(optarg, 1,
2453 UINT_MAX, &errstr);
2454 if (errstr)
2455 fatal("Desired generator has bad value: %s (%s)",
2456 optarg, errstr);
2457 break;
2458 case 'M':
2459 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
2460 if (errstr)
2461 fatal("Memory limit is %s: %s", errstr, optarg);
2462 break;
2463 case 'G':
2464 do_gen_candidates = 1;
2465 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
2466 sizeof(out_file))
2467 fatal("Output filename too long");
2468 break;
2469 case 'T':
2470 do_screen_candidates = 1;
2471 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
2472 sizeof(out_file))
2473 fatal("Output filename too long");
2474 break;
2475 case 'K':
2476 if (strlen(optarg) >= PATH_MAX)
2477 fatal("Checkpoint filename too long");
2478 checkpoint = xstrdup(optarg);
2479 break;
2480 case 'S':
2481 /* XXX - also compare length against bits */
2482 if (BN_hex2bn(&start, optarg) == 0)
2483 fatal("Invalid start point.");
2484 break;
2485 #endif /* WITH_OPENSSL */
2486 case '?':
2487 default:
2488 usage();
2489 }
2490 }
2491
2492 /* reinit */
2493 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
2494
2495 argv += optind;
2496 argc -= optind;
2497
2498 if (ca_key_path != NULL) {
2499 if (argc < 1 && !gen_krl) {
2500 error("Too few arguments.");
2501 usage();
2502 }
2503 } else if (argc > 0 && !gen_krl && !check_krl) {
2504 error("Too many arguments.");
2505 usage();
2506 }
2507 if (change_passphrase && change_comment) {
2508 error("Can only have one of -p and -c.");
2509 usage();
2510 }
2511 if (print_fingerprint && (delete_host || hash_hosts)) {
2512 error("Cannot use -l with -H or -R.");
2513 usage();
2514 }
2515 if (gen_krl) {
2516 do_gen_krl(pw, update_krl, argc, argv);
2517 return (0);
2518 }
2519 if (check_krl) {
2520 do_check_krl(pw, argc, argv);
2521 return (0);
2522 }
2523 if (ca_key_path != NULL) {
2524 if (cert_key_id == NULL)
2525 fatal("Must specify key id (-I) when certifying");
2526 do_ca_sign(pw, argc, argv);
2527 }
2528 if (show_cert)
2529 do_show_cert(pw);
2530 if (delete_host || hash_hosts || find_host)
2531 do_known_hosts(pw, rr_hostname);
2532 if (pkcs11provider != NULL)
2533 do_download(pw);
2534 if (print_fingerprint || print_bubblebabble)
2535 do_fingerprint(pw);
2536 if (change_passphrase)
2537 do_change_passphrase(pw);
2538 if (change_comment)
2539 do_change_comment(pw);
2540 #ifdef WITH_OPENSSL
2541 if (convert_to)
2542 do_convert_to(pw);
2543 if (convert_from)
2544 do_convert_from(pw);
2545 #endif
2546 if (print_public)
2547 do_print_public(pw);
2548 if (rr_hostname != NULL) {
2549 unsigned int n = 0;
2550
2551 if (have_identity) {
2552 n = do_print_resource_record(pw,
2553 identity_file, rr_hostname);
2554 if (n == 0)
2555 fatal("%s: %s", identity_file, strerror(errno));
2556 exit(0);
2557 } else {
2558
2559 n += do_print_resource_record(pw,
2560 _PATH_HOST_RSA_KEY_FILE, rr_hostname);
2561 n += do_print_resource_record(pw,
2562 _PATH_HOST_DSA_KEY_FILE, rr_hostname);
2563 n += do_print_resource_record(pw,
2564 _PATH_HOST_ECDSA_KEY_FILE, rr_hostname);
2565 n += do_print_resource_record(pw,
2566 _PATH_HOST_ED25519_KEY_FILE, rr_hostname);
2567 if (n == 0)
2568 fatal("no keys found.");
2569 exit(0);
2570 }
2571 }
2572
2573 #ifdef WITH_OPENSSL
2574 if (do_gen_candidates) {
2575 FILE *out = fopen(out_file, "w");
2576
2577 if (out == NULL) {
2578 error("Couldn't open modulus candidate file \"%s\": %s",
2579 out_file, strerror(errno));
2580 return (1);
2581 }
2582 if (bits == 0)
2583 bits = DEFAULT_BITS;
2584 if (gen_candidates(out, memory, bits, start) != 0)
2585 fatal("modulus candidate generation failed");
2586
2587 return (0);
2588 }
2589
2590 if (do_screen_candidates) {
2591 FILE *in;
2592 FILE *out = fopen(out_file, "a");
2593
2594 if (have_identity && strcmp(identity_file, "-") != 0) {
2595 if ((in = fopen(identity_file, "r")) == NULL) {
2596 fatal("Couldn't open modulus candidate "
2597 "file \"%s\": %s", identity_file,
2598 strerror(errno));
2599 }
2600 } else
2601 in = stdin;
2602
2603 if (out == NULL) {
2604 fatal("Couldn't open moduli file \"%s\": %s",
2605 out_file, strerror(errno));
2606 }
2607 if (prime_test(in, out, rounds == 0 ? 100 : rounds,
2608 generator_wanted, checkpoint,
2609 start_lineno, lines_to_process) != 0)
2610 fatal("modulus screening failed");
2611 return (0);
2612 }
2613 #endif
2614
2615 if (gen_all_hostkeys) {
2616 do_gen_all_hostkeys(pw);
2617 return (0);
2618 }
2619
2620 if (key_type_name == NULL)
2621 key_type_name = DEFAULT_KEY_TYPE_NAME;
2622
2623 type = sshkey_type_from_name(key_type_name);
2624 type_bits_valid(type, key_type_name, &bits);
2625
2626 if (!quiet)
2627 printf("Generating public/private %s key pair.\n",
2628 key_type_name);
2629 if ((r = sshkey_generate(type, bits, &private)) != 0)
2630 fatal("key_generate failed");
2631 if ((r = sshkey_from_private(private, &public)) != 0)
2632 fatal("key_from_private failed: %s\n", ssh_err(r));
2633
2634 if (!have_identity)
2635 ask_filename(pw, "Enter file in which to save the key");
2636
2637 /* Create ~/.ssh directory if it doesn't already exist. */
2638 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s",
2639 pw->pw_dir, _PATH_SSH_USER_DIR);
2640 if (strstr(identity_file, dotsshdir) != NULL) {
2641 if (stat(dotsshdir, &st) < 0) {
2642 if (errno != ENOENT) {
2643 error("Could not stat %s: %s", dotsshdir,
2644 strerror(errno));
2645 } else if (mkdir(dotsshdir, 0700) < 0) {
2646 error("Could not create directory '%s': %s",
2647 dotsshdir, strerror(errno));
2648 } else if (!quiet)
2649 printf("Created directory '%s'.\n", dotsshdir);
2650 }
2651 }
2652 /* If the file already exists, ask the user to confirm. */
2653 if (stat(identity_file, &st) >= 0) {
2654 char yesno[3];
2655 printf("%s already exists.\n", identity_file);
2656 printf("Overwrite (y/n)? ");
2657 fflush(stdout);
2658 if (fgets(yesno, sizeof(yesno), stdin) == NULL)
2659 exit(1);
2660 if (yesno[0] != 'y' && yesno[0] != 'Y')
2661 exit(1);
2662 }
2663 /* Ask for a passphrase (twice). */
2664 if (identity_passphrase)
2665 passphrase1 = xstrdup(identity_passphrase);
2666 else if (identity_new_passphrase)
2667 passphrase1 = xstrdup(identity_new_passphrase);
2668 else {
2669 passphrase_again:
2670 passphrase1 =
2671 read_passphrase("Enter passphrase (empty for no "
2672 "passphrase): ", RP_ALLOW_STDIN);
2673 passphrase2 = read_passphrase("Enter same passphrase again: ",
2674 RP_ALLOW_STDIN);
2675 if (strcmp(passphrase1, passphrase2) != 0) {
2676 /*
2677 * The passphrases do not match. Clear them and
2678 * retry.
2679 */
2680 explicit_bzero(passphrase1, strlen(passphrase1));
2681 explicit_bzero(passphrase2, strlen(passphrase2));
2682 free(passphrase1);
2683 free(passphrase2);
2684 printf("Passphrases do not match. Try again.\n");
2685 goto passphrase_again;
2686 }
2687 /* Clear the other copy of the passphrase. */
2688 explicit_bzero(passphrase2, strlen(passphrase2));
2689 free(passphrase2);
2690 }
2691
2692 if (identity_comment) {
2693 strlcpy(comment, identity_comment, sizeof(comment));
2694 } else {
2695 /* Create default comment field for the passphrase. */
2696 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
2697 }
2698
2699 /* Save the key with the given passphrase and comment. */
2700 if ((r = sshkey_save_private(private, identity_file, passphrase1,
2701 comment, use_new_format, new_format_cipher, rounds)) != 0) {
2702 error("Saving key \"%s\" failed: %s",
2703 identity_file, ssh_err(r));
2704 explicit_bzero(passphrase1, strlen(passphrase1));
2705 free(passphrase1);
2706 exit(1);
2707 }
2708 /* Clear the passphrase. */
2709 explicit_bzero(passphrase1, strlen(passphrase1));
2710 free(passphrase1);
2711
2712 /* Clear the private key and the random number generator. */
2713 sshkey_free(private);
2714
2715 if (!quiet)
2716 printf("Your identification has been saved in %s.\n", identity_file);
2717
2718 strlcat(identity_file, ".pub", sizeof(identity_file));
2719 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
2720 fatal("Unable to save public key to %s: %s",
2721 identity_file, strerror(errno));
2722 if ((f = fdopen(fd, "w")) == NULL)
2723 fatal("fdopen %s failed: %s", identity_file, strerror(errno));
2724 if ((r = sshkey_write(public, f)) != 0)
2725 error("write key failed: %s", ssh_err(r));
2726 fprintf(f, " %s\n", comment);
2727 fclose(f);
2728
2729 if (!quiet) {
2730 fp = sshkey_fingerprint(public, fingerprint_hash,
2731 SSH_FP_DEFAULT);
2732 ra = sshkey_fingerprint(public, fingerprint_hash,
2733 SSH_FP_RANDOMART);
2734 if (fp == NULL || ra == NULL)
2735 fatal("sshkey_fingerprint failed");
2736 printf("Your public key has been saved in %s.\n",
2737 identity_file);
2738 printf("The key fingerprint is:\n");
2739 printf("%s %s\n", fp, comment);
2740 printf("The key's randomart image is:\n");
2741 printf("%s\n", ra);
2742 free(ra);
2743 free(fp);
2744 }
2745
2746 sshkey_free(public);
2747 exit(0);
2748 }
DragonFly BSD