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3c0ef626 | 1 | /* |
2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
3 | * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5 | * Identity and host key generation and maintenance. | |
6 | * | |
7 | * As far as I am concerned, the code I have written for this software | |
8 | * can be used freely for any purpose. Any derived versions of this | |
9 | * software must be clearly marked as such, and if the derived work is | |
10 | * incompatible with the protocol description in the RFC file, it must be | |
11 | * called by a name other than "ssh" or "Secure Shell". | |
12 | */ | |
13 | ||
14 | #include "includes.h" | |
2c06c99b | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.135 2005/11/29 02:04:55 dtucker Exp $"); |
3c0ef626 | 16 | |
17 | #include <openssl/evp.h> | |
18 | #include <openssl/pem.h> | |
19 | ||
20 | #include "xmalloc.h" | |
21 | #include "key.h" | |
22 | #include "rsa.h" | |
23 | #include "authfile.h" | |
24 | #include "uuencode.h" | |
25 | #include "buffer.h" | |
26 | #include "bufaux.h" | |
27 | #include "pathnames.h" | |
28 | #include "log.h" | |
c9f39d2c | 29 | #include "misc.h" |
996d5e62 | 30 | #include "match.h" |
31 | #include "hostfile.h" | |
3c0ef626 | 32 | |
33 | #ifdef SMARTCARD | |
3c0ef626 | 34 | #include "scard.h" |
35 | #endif | |
0fff78ff | 36 | #include "dns.h" |
3c0ef626 | 37 | |
2c06c99b | 38 | /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ |
39 | #define DEFAULT_BITS 2048 | |
40 | #define DEFAULT_BITS_DSA 1024 | |
41 | u_int32_t bits = 0; | |
3c0ef626 | 42 | |
43 | /* | |
44 | * Flag indicating that we just want to change the passphrase. This can be | |
45 | * set on the command line. | |
46 | */ | |
47 | int change_passphrase = 0; | |
48 | ||
49 | /* | |
50 | * Flag indicating that we just want to change the comment. This can be set | |
51 | * on the command line. | |
52 | */ | |
53 | int change_comment = 0; | |
54 | ||
55 | int quiet = 0; | |
56 | ||
996d5e62 | 57 | /* Flag indicating that we want to hash a known_hosts file */ |
58 | int hash_hosts = 0; | |
59 | /* Flag indicating that we want lookup a host in known_hosts file */ | |
60 | int find_host = 0; | |
61 | /* Flag indicating that we want to delete a host from a known_hosts file */ | |
62 | int delete_host = 0; | |
63 | ||
3c0ef626 | 64 | /* Flag indicating that we just want to see the key fingerprint */ |
65 | int print_fingerprint = 0; | |
66 | int print_bubblebabble = 0; | |
67 | ||
68 | /* The identity file name, given on the command line or entered by the user. */ | |
69 | char identity_file[1024]; | |
70 | int have_identity = 0; | |
71 | ||
72 | /* This is set to the passphrase if given on the command line. */ | |
73 | char *identity_passphrase = NULL; | |
74 | ||
75 | /* This is set to the new passphrase if given on the command line. */ | |
76 | char *identity_new_passphrase = NULL; | |
77 | ||
78 | /* This is set to the new comment if given on the command line. */ | |
79 | char *identity_comment = NULL; | |
80 | ||
81 | /* Dump public key file in format used by real and the original SSH 2 */ | |
82 | int convert_to_ssh2 = 0; | |
83 | int convert_from_ssh2 = 0; | |
84 | int print_public = 0; | |
0fff78ff | 85 | int print_generic = 0; |
3c0ef626 | 86 | |
e9a17296 | 87 | char *key_type_name = NULL; |
3c0ef626 | 88 | |
89 | /* argv0 */ | |
3c0ef626 | 90 | extern char *__progname; |
3c0ef626 | 91 | |
92 | char hostname[MAXHOSTNAMELEN]; | |
93 | ||
c9f39d2c | 94 | /* moduli.c */ |
665a873d | 95 | int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
c9f39d2c | 96 | int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
97 | ||
3c0ef626 | 98 | static void |
99 | ask_filename(struct passwd *pw, const char *prompt) | |
100 | { | |
101 | char buf[1024]; | |
102 | char *name = NULL; | |
103 | ||
e9a17296 | 104 | if (key_type_name == NULL) |
3c0ef626 | 105 | name = _PATH_SSH_CLIENT_ID_RSA; |
e9a17296 | 106 | else |
107 | switch (key_type_from_name(key_type_name)) { | |
108 | case KEY_RSA1: | |
109 | name = _PATH_SSH_CLIENT_IDENTITY; | |
110 | break; | |
111 | case KEY_DSA: | |
112 | name = _PATH_SSH_CLIENT_ID_DSA; | |
113 | break; | |
114 | case KEY_RSA: | |
115 | name = _PATH_SSH_CLIENT_ID_RSA; | |
116 | break; | |
117 | default: | |
118 | fprintf(stderr, "bad key type"); | |
119 | exit(1); | |
120 | break; | |
121 | } | |
122 | ||
3c0ef626 | 123 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
124 | fprintf(stderr, "%s (%s): ", prompt, identity_file); | |
3c0ef626 | 125 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
126 | exit(1); | |
127 | if (strchr(buf, '\n')) | |
128 | *strchr(buf, '\n') = 0; | |
129 | if (strcmp(buf, "") != 0) | |
130 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
131 | have_identity = 1; | |
132 | } | |
133 | ||
134 | static Key * | |
135 | load_identity(char *filename) | |
136 | { | |
137 | char *pass; | |
138 | Key *prv; | |
139 | ||
140 | prv = key_load_private(filename, "", NULL); | |
141 | if (prv == NULL) { | |
142 | if (identity_passphrase) | |
143 | pass = xstrdup(identity_passphrase); | |
144 | else | |
145 | pass = read_passphrase("Enter passphrase: ", | |
146 | RP_ALLOW_STDIN); | |
147 | prv = key_load_private(filename, pass, NULL); | |
148 | memset(pass, 0, strlen(pass)); | |
149 | xfree(pass); | |
150 | } | |
151 | return prv; | |
152 | } | |
153 | ||
154 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" | |
f5799ae1 | 155 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
3c0ef626 | 156 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
157 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb | |
158 | ||
159 | static void | |
160 | do_convert_to_ssh2(struct passwd *pw) | |
161 | { | |
162 | Key *k; | |
e9a17296 | 163 | u_int len; |
3c0ef626 | 164 | u_char *blob; |
165 | struct stat st; | |
166 | ||
167 | if (!have_identity) | |
168 | ask_filename(pw, "Enter file in which the key is"); | |
169 | if (stat(identity_file, &st) < 0) { | |
170 | perror(identity_file); | |
171 | exit(1); | |
172 | } | |
173 | if ((k = key_load_public(identity_file, NULL)) == NULL) { | |
174 | if ((k = load_identity(identity_file)) == NULL) { | |
175 | fprintf(stderr, "load failed\n"); | |
176 | exit(1); | |
177 | } | |
178 | } | |
0fff78ff | 179 | if (k->type == KEY_RSA1) { |
180 | fprintf(stderr, "version 1 keys are not supported\n"); | |
181 | exit(1); | |
182 | } | |
3c0ef626 | 183 | if (key_to_blob(k, &blob, &len) <= 0) { |
184 | fprintf(stderr, "key_to_blob failed\n"); | |
185 | exit(1); | |
186 | } | |
187 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); | |
188 | fprintf(stdout, | |
680cee3b | 189 | "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", |
3c0ef626 | 190 | key_size(k), key_type(k), |
191 | pw->pw_name, hostname); | |
192 | dump_base64(stdout, blob, len); | |
193 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); | |
194 | key_free(k); | |
195 | xfree(blob); | |
196 | exit(0); | |
197 | } | |
198 | ||
199 | static void | |
200 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) | |
201 | { | |
c9f39d2c | 202 | u_int bignum_bits = buffer_get_int(b); |
203 | u_int bytes = (bignum_bits + 7) / 8; | |
3c0ef626 | 204 | |
205 | if (buffer_len(b) < bytes) | |
206 | fatal("buffer_get_bignum_bits: input buffer too small: " | |
207 | "need %d have %d", bytes, buffer_len(b)); | |
e9a17296 | 208 | BN_bin2bn(buffer_ptr(b), bytes, value); |
3c0ef626 | 209 | buffer_consume(b, bytes); |
210 | } | |
211 | ||
212 | static Key * | |
e9a17296 | 213 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
3c0ef626 | 214 | { |
215 | Buffer b; | |
216 | Key *key = NULL; | |
217 | char *type, *cipher; | |
218 | u_char *sig, data[] = "abcde12345"; | |
219 | int magic, rlen, ktype, i1, i2, i3, i4; | |
220 | u_int slen; | |
221 | u_long e; | |
222 | ||
223 | buffer_init(&b); | |
224 | buffer_append(&b, blob, blen); | |
225 | ||
226 | magic = buffer_get_int(&b); | |
227 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
228 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
229 | buffer_free(&b); | |
230 | return NULL; | |
231 | } | |
232 | i1 = buffer_get_int(&b); | |
233 | type = buffer_get_string(&b, NULL); | |
234 | cipher = buffer_get_string(&b, NULL); | |
235 | i2 = buffer_get_int(&b); | |
236 | i3 = buffer_get_int(&b); | |
237 | i4 = buffer_get_int(&b); | |
238 | debug("ignore (%d %d %d %d)", i1,i2,i3,i4); | |
239 | if (strcmp(cipher, "none") != 0) { | |
240 | error("unsupported cipher %s", cipher); | |
241 | xfree(cipher); | |
242 | buffer_free(&b); | |
243 | xfree(type); | |
244 | return NULL; | |
245 | } | |
246 | xfree(cipher); | |
247 | ||
248 | if (strstr(type, "dsa")) { | |
249 | ktype = KEY_DSA; | |
250 | } else if (strstr(type, "rsa")) { | |
251 | ktype = KEY_RSA; | |
252 | } else { | |
996d5e62 | 253 | buffer_free(&b); |
3c0ef626 | 254 | xfree(type); |
255 | return NULL; | |
256 | } | |
257 | key = key_new_private(ktype); | |
258 | xfree(type); | |
259 | ||
260 | switch (key->type) { | |
261 | case KEY_DSA: | |
262 | buffer_get_bignum_bits(&b, key->dsa->p); | |
263 | buffer_get_bignum_bits(&b, key->dsa->g); | |
264 | buffer_get_bignum_bits(&b, key->dsa->q); | |
265 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
266 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
267 | break; | |
268 | case KEY_RSA: | |
269 | e = buffer_get_char(&b); | |
270 | debug("e %lx", e); | |
271 | if (e < 30) { | |
272 | e <<= 8; | |
273 | e += buffer_get_char(&b); | |
274 | debug("e %lx", e); | |
275 | e <<= 8; | |
276 | e += buffer_get_char(&b); | |
277 | debug("e %lx", e); | |
278 | } | |
279 | if (!BN_set_word(key->rsa->e, e)) { | |
280 | buffer_free(&b); | |
281 | key_free(key); | |
282 | return NULL; | |
283 | } | |
284 | buffer_get_bignum_bits(&b, key->rsa->d); | |
285 | buffer_get_bignum_bits(&b, key->rsa->n); | |
286 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
287 | buffer_get_bignum_bits(&b, key->rsa->q); | |
288 | buffer_get_bignum_bits(&b, key->rsa->p); | |
289 | rsa_generate_additional_parameters(key->rsa); | |
290 | break; | |
291 | } | |
292 | rlen = buffer_len(&b); | |
e9a17296 | 293 | if (rlen != 0) |
3c0ef626 | 294 | error("do_convert_private_ssh2_from_blob: " |
295 | "remaining bytes in key blob %d", rlen); | |
296 | buffer_free(&b); | |
297 | ||
298 | /* try the key */ | |
299 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
300 | key_verify(key, sig, slen, data, sizeof(data)); | |
301 | xfree(sig); | |
302 | return key; | |
303 | } | |
304 | ||
305 | static void | |
306 | do_convert_from_ssh2(struct passwd *pw) | |
307 | { | |
308 | Key *k; | |
309 | int blen; | |
700318f3 | 310 | u_int len; |
3c0ef626 | 311 | char line[1024], *p; |
312 | u_char blob[8096]; | |
313 | char encoded[8096]; | |
314 | struct stat st; | |
315 | int escaped = 0, private = 0, ok; | |
316 | FILE *fp; | |
317 | ||
318 | if (!have_identity) | |
319 | ask_filename(pw, "Enter file in which the key is"); | |
320 | if (stat(identity_file, &st) < 0) { | |
321 | perror(identity_file); | |
322 | exit(1); | |
323 | } | |
324 | fp = fopen(identity_file, "r"); | |
325 | if (fp == NULL) { | |
326 | perror(identity_file); | |
327 | exit(1); | |
328 | } | |
329 | encoded[0] = '\0'; | |
330 | while (fgets(line, sizeof(line), fp)) { | |
331 | if (!(p = strchr(line, '\n'))) { | |
332 | fprintf(stderr, "input line too long.\n"); | |
333 | exit(1); | |
334 | } | |
335 | if (p > line && p[-1] == '\\') | |
336 | escaped++; | |
337 | if (strncmp(line, "----", 4) == 0 || | |
338 | strstr(line, ": ") != NULL) { | |
339 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) | |
340 | private = 1; | |
341 | if (strstr(line, " END ") != NULL) { | |
342 | break; | |
343 | } | |
344 | /* fprintf(stderr, "ignore: %s", line); */ | |
345 | continue; | |
346 | } | |
347 | if (escaped) { | |
348 | escaped--; | |
349 | /* fprintf(stderr, "escaped: %s", line); */ | |
350 | continue; | |
351 | } | |
352 | *p = '\0'; | |
353 | strlcat(encoded, line, sizeof(encoded)); | |
354 | } | |
700318f3 | 355 | len = strlen(encoded); |
356 | if (((len % 4) == 3) && | |
357 | (encoded[len-1] == '=') && | |
358 | (encoded[len-2] == '=') && | |
359 | (encoded[len-3] == '=')) | |
360 | encoded[len-3] = '\0'; | |
e9a17296 | 361 | blen = uudecode(encoded, blob, sizeof(blob)); |
3c0ef626 | 362 | if (blen < 0) { |
363 | fprintf(stderr, "uudecode failed.\n"); | |
364 | exit(1); | |
365 | } | |
366 | k = private ? | |
367 | do_convert_private_ssh2_from_blob(blob, blen) : | |
368 | key_from_blob(blob, blen); | |
369 | if (k == NULL) { | |
370 | fprintf(stderr, "decode blob failed.\n"); | |
371 | exit(1); | |
372 | } | |
373 | ok = private ? | |
374 | (k->type == KEY_DSA ? | |
375 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
376 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
377 | key_write(k, stdout); | |
378 | if (!ok) { | |
379 | fprintf(stderr, "key write failed"); | |
380 | exit(1); | |
381 | } | |
382 | key_free(k); | |
e9a17296 | 383 | if (!private) |
384 | fprintf(stdout, "\n"); | |
3c0ef626 | 385 | fclose(fp); |
386 | exit(0); | |
387 | } | |
388 | ||
389 | static void | |
390 | do_print_public(struct passwd *pw) | |
391 | { | |
392 | Key *prv; | |
393 | struct stat st; | |
394 | ||
395 | if (!have_identity) | |
396 | ask_filename(pw, "Enter file in which the key is"); | |
397 | if (stat(identity_file, &st) < 0) { | |
398 | perror(identity_file); | |
399 | exit(1); | |
400 | } | |
401 | prv = load_identity(identity_file); | |
402 | if (prv == NULL) { | |
403 | fprintf(stderr, "load failed\n"); | |
404 | exit(1); | |
405 | } | |
406 | if (!key_write(prv, stdout)) | |
407 | fprintf(stderr, "key_write failed"); | |
408 | key_free(prv); | |
409 | fprintf(stdout, "\n"); | |
410 | exit(0); | |
411 | } | |
412 | ||
413 | #ifdef SMARTCARD | |
3c0ef626 | 414 | static void |
415 | do_upload(struct passwd *pw, const char *sc_reader_id) | |
416 | { | |
417 | Key *prv = NULL; | |
418 | struct stat st; | |
700318f3 | 419 | int ret; |
420 | ||
3c0ef626 | 421 | if (!have_identity) |
422 | ask_filename(pw, "Enter file in which the key is"); | |
423 | if (stat(identity_file, &st) < 0) { | |
424 | perror(identity_file); | |
700318f3 | 425 | exit(1); |
3c0ef626 | 426 | } |
427 | prv = load_identity(identity_file); | |
428 | if (prv == NULL) { | |
429 | error("load failed"); | |
700318f3 | 430 | exit(1); |
3c0ef626 | 431 | } |
700318f3 | 432 | ret = sc_put_key(prv, sc_reader_id); |
433 | key_free(prv); | |
434 | if (ret < 0) | |
435 | exit(1); | |
0fff78ff | 436 | logit("loading key done"); |
700318f3 | 437 | exit(0); |
3c0ef626 | 438 | } |
439 | ||
440 | static void | |
441 | do_download(struct passwd *pw, const char *sc_reader_id) | |
442 | { | |
700318f3 | 443 | Key **keys = NULL; |
444 | int i; | |
3c0ef626 | 445 | |
700318f3 | 446 | keys = sc_get_keys(sc_reader_id, NULL); |
447 | if (keys == NULL) | |
3c0ef626 | 448 | fatal("cannot read public key from smartcard"); |
700318f3 | 449 | for (i = 0; keys[i]; i++) { |
450 | key_write(keys[i], stdout); | |
451 | key_free(keys[i]); | |
452 | fprintf(stdout, "\n"); | |
453 | } | |
454 | xfree(keys); | |
3c0ef626 | 455 | exit(0); |
456 | } | |
457 | #endif /* SMARTCARD */ | |
458 | ||
459 | static void | |
460 | do_fingerprint(struct passwd *pw) | |
461 | { | |
462 | FILE *f; | |
463 | Key *public; | |
464 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; | |
e9a17296 | 465 | int i, skip = 0, num = 1, invalid = 1; |
466 | enum fp_rep rep; | |
467 | enum fp_type fptype; | |
3c0ef626 | 468 | struct stat st; |
469 | ||
470 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; | |
471 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
472 | ||
473 | if (!have_identity) | |
474 | ask_filename(pw, "Enter file in which the key is"); | |
475 | if (stat(identity_file, &st) < 0) { | |
476 | perror(identity_file); | |
477 | exit(1); | |
478 | } | |
479 | public = key_load_public(identity_file, &comment); | |
480 | if (public != NULL) { | |
481 | fp = key_fingerprint(public, fptype, rep); | |
680cee3b | 482 | printf("%u %s %s\n", key_size(public), fp, comment); |
3c0ef626 | 483 | key_free(public); |
484 | xfree(comment); | |
485 | xfree(fp); | |
486 | exit(0); | |
487 | } | |
488 | if (comment) | |
489 | xfree(comment); | |
490 | ||
491 | f = fopen(identity_file, "r"); | |
492 | if (f != NULL) { | |
493 | while (fgets(line, sizeof(line), f)) { | |
494 | i = strlen(line) - 1; | |
495 | if (line[i] != '\n') { | |
496 | error("line %d too long: %.40s...", num, line); | |
497 | skip = 1; | |
498 | continue; | |
499 | } | |
500 | num++; | |
501 | if (skip) { | |
502 | skip = 0; | |
503 | continue; | |
504 | } | |
505 | line[i] = '\0'; | |
506 | ||
507 | /* Skip leading whitespace, empty and comment lines. */ | |
508 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
509 | ; | |
510 | if (!*cp || *cp == '\n' || *cp == '#') | |
511 | continue ; | |
512 | i = strtol(cp, &ep, 10); | |
513 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
514 | int quoted = 0; | |
515 | comment = cp; | |
680cee3b | 516 | for (; *cp && (quoted || (*cp != ' ' && |
517 | *cp != '\t')); cp++) { | |
3c0ef626 | 518 | if (*cp == '\\' && cp[1] == '"') |
519 | cp++; /* Skip both */ | |
520 | else if (*cp == '"') | |
521 | quoted = !quoted; | |
522 | } | |
523 | if (!*cp) | |
524 | continue; | |
525 | *cp++ = '\0'; | |
526 | } | |
527 | ep = cp; | |
528 | public = key_new(KEY_RSA1); | |
529 | if (key_read(public, &cp) != 1) { | |
530 | cp = ep; | |
531 | key_free(public); | |
532 | public = key_new(KEY_UNSPEC); | |
533 | if (key_read(public, &cp) != 1) { | |
534 | key_free(public); | |
535 | continue; | |
536 | } | |
537 | } | |
538 | comment = *cp ? cp : comment; | |
539 | fp = key_fingerprint(public, fptype, rep); | |
680cee3b | 540 | printf("%u %s %s\n", key_size(public), fp, |
3c0ef626 | 541 | comment ? comment : "no comment"); |
542 | xfree(fp); | |
543 | key_free(public); | |
544 | invalid = 0; | |
545 | } | |
546 | fclose(f); | |
547 | } | |
548 | if (invalid) { | |
549 | printf("%s is not a public key file.\n", identity_file); | |
550 | exit(1); | |
551 | } | |
552 | exit(0); | |
553 | } | |
554 | ||
996d5e62 | 555 | static void |
556 | print_host(FILE *f, char *name, Key *public, int hash) | |
557 | { | |
558 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
559 | fatal("hash_host failed"); | |
560 | fprintf(f, "%s ", name); | |
561 | if (!key_write(public, f)) | |
562 | fatal("key_write failed"); | |
563 | fprintf(f, "\n"); | |
564 | } | |
565 | ||
566 | static void | |
567 | do_known_hosts(struct passwd *pw, const char *name) | |
568 | { | |
569 | FILE *in, *out = stdout; | |
570 | Key *public; | |
571 | char *cp, *cp2, *kp, *kp2; | |
572 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
573 | int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; | |
574 | ||
575 | if (!have_identity) { | |
576 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
577 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
578 | sizeof(identity_file)) | |
579 | fatal("Specified known hosts path too long"); | |
580 | xfree(cp); | |
581 | have_identity = 1; | |
582 | } | |
583 | if ((in = fopen(identity_file, "r")) == NULL) | |
584 | fatal("fopen: %s", strerror(errno)); | |
585 | ||
586 | /* | |
587 | * Find hosts goes to stdout, hash and deletions happen in-place | |
588 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
589 | */ | |
590 | if (!find_host && (hash_hosts || delete_host)) { | |
591 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
592 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
593 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
594 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
595 | fatal("known_hosts path too long"); | |
596 | umask(077); | |
597 | if ((c = mkstemp(tmp)) == -1) | |
598 | fatal("mkstemp: %s", strerror(errno)); | |
599 | if ((out = fdopen(c, "w")) == NULL) { | |
600 | c = errno; | |
601 | unlink(tmp); | |
602 | fatal("fdopen: %s", strerror(c)); | |
603 | } | |
604 | inplace = 1; | |
605 | } | |
606 | ||
607 | while (fgets(line, sizeof(line), in)) { | |
608 | num++; | |
609 | i = strlen(line) - 1; | |
610 | if (line[i] != '\n') { | |
611 | error("line %d too long: %.40s...", num, line); | |
612 | skip = 1; | |
613 | invalid = 1; | |
614 | continue; | |
615 | } | |
616 | if (skip) { | |
617 | skip = 0; | |
618 | continue; | |
619 | } | |
620 | line[i] = '\0'; | |
621 | ||
622 | /* Skip leading whitespace, empty and comment lines. */ | |
623 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
624 | ; | |
625 | if (!*cp || *cp == '\n' || *cp == '#') { | |
626 | if (inplace) | |
627 | fprintf(out, "%s\n", cp); | |
628 | continue; | |
629 | } | |
630 | /* Find the end of the host name portion. */ | |
631 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
632 | ; | |
633 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
634 | error("line %d missing key: %.40s...", | |
635 | num, line); | |
636 | invalid = 1; | |
637 | continue; | |
638 | } | |
639 | *kp++ = '\0'; | |
640 | kp2 = kp; | |
641 | ||
642 | public = key_new(KEY_RSA1); | |
643 | if (key_read(public, &kp) != 1) { | |
644 | kp = kp2; | |
645 | key_free(public); | |
646 | public = key_new(KEY_UNSPEC); | |
647 | if (key_read(public, &kp) != 1) { | |
648 | error("line %d invalid key: %.40s...", | |
649 | num, line); | |
650 | key_free(public); | |
651 | invalid = 1; | |
652 | continue; | |
653 | } | |
654 | } | |
655 | ||
656 | if (*cp == HASH_DELIM) { | |
657 | if (find_host || delete_host) { | |
658 | cp2 = host_hash(name, cp, strlen(cp)); | |
659 | if (cp2 == NULL) { | |
660 | error("line %d: invalid hashed " | |
661 | "name: %.64s...", num, line); | |
662 | invalid = 1; | |
663 | continue; | |
664 | } | |
665 | c = (strcmp(cp2, cp) == 0); | |
666 | if (find_host && c) { | |
667 | printf("# Host %s found: " | |
668 | "line %d type %s\n", name, | |
669 | num, key_type(public)); | |
670 | print_host(out, cp, public, 0); | |
671 | } | |
672 | if (delete_host && !c) | |
673 | print_host(out, cp, public, 0); | |
674 | } else if (hash_hosts) | |
675 | print_host(out, cp, public, 0); | |
676 | } else { | |
677 | if (find_host || delete_host) { | |
678 | c = (match_hostname(name, cp, | |
679 | strlen(cp)) == 1); | |
680 | if (find_host && c) { | |
681 | printf("# Host %s found: " | |
682 | "line %d type %s\n", name, | |
683 | num, key_type(public)); | |
684 | print_host(out, cp, public, hash_hosts); | |
685 | } | |
686 | if (delete_host && !c) | |
687 | print_host(out, cp, public, 0); | |
688 | } else if (hash_hosts) { | |
dec6d9fe | 689 | for (cp2 = strsep(&cp, ","); |
996d5e62 | 690 | cp2 != NULL && *cp2 != '\0'; |
691 | cp2 = strsep(&cp, ",")) { | |
692 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
693 | fprintf(stderr, "Warning: " | |
694 | "ignoring host name with " | |
695 | "metacharacters: %.64s\n", | |
696 | cp2); | |
697 | else | |
698 | print_host(out, cp2, public, 1); | |
699 | } | |
700 | has_unhashed = 1; | |
701 | } | |
702 | } | |
703 | key_free(public); | |
704 | } | |
705 | fclose(in); | |
706 | ||
707 | if (invalid) { | |
708 | fprintf(stderr, "%s is not a valid known_host file.\n", | |
709 | identity_file); | |
710 | if (inplace) { | |
711 | fprintf(stderr, "Not replacing existing known_hosts " | |
dec6d9fe | 712 | "file because of errors\n"); |
996d5e62 | 713 | fclose(out); |
714 | unlink(tmp); | |
715 | } | |
716 | exit(1); | |
717 | } | |
718 | ||
719 | if (inplace) { | |
720 | fclose(out); | |
721 | ||
722 | /* Backup existing file */ | |
723 | if (unlink(old) == -1 && errno != ENOENT) | |
724 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
725 | if (link(identity_file, old) == -1) | |
726 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
727 | strerror(errno)); | |
728 | /* Move new one into place */ | |
729 | if (rename(tmp, identity_file) == -1) { | |
730 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
731 | strerror(errno)); | |
732 | unlink(tmp); | |
733 | unlink(old); | |
734 | exit(1); | |
735 | } | |
736 | ||
737 | fprintf(stderr, "%s updated.\n", identity_file); | |
738 | fprintf(stderr, "Original contents retained as %s\n", old); | |
739 | if (has_unhashed) { | |
740 | fprintf(stderr, "WARNING: %s contains unhashed " | |
741 | "entries\n", old); | |
742 | fprintf(stderr, "Delete this file to ensure privacy " | |
665a873d | 743 | "of hostnames\n"); |
996d5e62 | 744 | } |
745 | } | |
746 | ||
747 | exit(0); | |
748 | } | |
749 | ||
3c0ef626 | 750 | /* |
751 | * Perform changing a passphrase. The argument is the passwd structure | |
752 | * for the current user. | |
753 | */ | |
754 | static void | |
755 | do_change_passphrase(struct passwd *pw) | |
756 | { | |
757 | char *comment; | |
758 | char *old_passphrase, *passphrase1, *passphrase2; | |
759 | struct stat st; | |
760 | Key *private; | |
761 | ||
762 | if (!have_identity) | |
763 | ask_filename(pw, "Enter file in which the key is"); | |
764 | if (stat(identity_file, &st) < 0) { | |
765 | perror(identity_file); | |
766 | exit(1); | |
767 | } | |
768 | /* Try to load the file with empty passphrase. */ | |
769 | private = key_load_private(identity_file, "", &comment); | |
770 | if (private == NULL) { | |
771 | if (identity_passphrase) | |
772 | old_passphrase = xstrdup(identity_passphrase); | |
773 | else | |
774 | old_passphrase = | |
775 | read_passphrase("Enter old passphrase: ", | |
776 | RP_ALLOW_STDIN); | |
777 | private = key_load_private(identity_file, old_passphrase, | |
778 | &comment); | |
779 | memset(old_passphrase, 0, strlen(old_passphrase)); | |
780 | xfree(old_passphrase); | |
781 | if (private == NULL) { | |
782 | printf("Bad passphrase.\n"); | |
783 | exit(1); | |
784 | } | |
785 | } | |
786 | printf("Key has comment '%s'\n", comment); | |
787 | ||
788 | /* Ask the new passphrase (twice). */ | |
789 | if (identity_new_passphrase) { | |
790 | passphrase1 = xstrdup(identity_new_passphrase); | |
791 | passphrase2 = NULL; | |
792 | } else { | |
793 | passphrase1 = | |
794 | read_passphrase("Enter new passphrase (empty for no " | |
795 | "passphrase): ", RP_ALLOW_STDIN); | |
796 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
e9a17296 | 797 | RP_ALLOW_STDIN); |
3c0ef626 | 798 | |
799 | /* Verify that they are the same. */ | |
800 | if (strcmp(passphrase1, passphrase2) != 0) { | |
801 | memset(passphrase1, 0, strlen(passphrase1)); | |
802 | memset(passphrase2, 0, strlen(passphrase2)); | |
803 | xfree(passphrase1); | |
804 | xfree(passphrase2); | |
805 | printf("Pass phrases do not match. Try again.\n"); | |
806 | exit(1); | |
807 | } | |
808 | /* Destroy the other copy. */ | |
809 | memset(passphrase2, 0, strlen(passphrase2)); | |
810 | xfree(passphrase2); | |
811 | } | |
812 | ||
813 | /* Save the file using the new passphrase. */ | |
814 | if (!key_save_private(private, identity_file, passphrase1, comment)) { | |
815 | printf("Saving the key failed: %s.\n", identity_file); | |
816 | memset(passphrase1, 0, strlen(passphrase1)); | |
817 | xfree(passphrase1); | |
818 | key_free(private); | |
819 | xfree(comment); | |
820 | exit(1); | |
821 | } | |
822 | /* Destroy the passphrase and the copy of the key in memory. */ | |
823 | memset(passphrase1, 0, strlen(passphrase1)); | |
824 | xfree(passphrase1); | |
825 | key_free(private); /* Destroys contents */ | |
826 | xfree(comment); | |
827 | ||
828 | printf("Your identification has been saved with the new passphrase.\n"); | |
829 | exit(0); | |
830 | } | |
831 | ||
0fff78ff | 832 | /* |
833 | * Print the SSHFP RR. | |
834 | */ | |
835 | static void | |
c9f39d2c | 836 | do_print_resource_record(struct passwd *pw, char *hname) |
0fff78ff | 837 | { |
838 | Key *public; | |
839 | char *comment = NULL; | |
840 | struct stat st; | |
841 | ||
842 | if (!have_identity) | |
843 | ask_filename(pw, "Enter file in which the key is"); | |
844 | if (stat(identity_file, &st) < 0) { | |
845 | perror(identity_file); | |
846 | exit(1); | |
847 | } | |
848 | public = key_load_public(identity_file, &comment); | |
849 | if (public != NULL) { | |
c9f39d2c | 850 | export_dns_rr(hname, public, stdout, print_generic); |
0fff78ff | 851 | key_free(public); |
852 | xfree(comment); | |
853 | exit(0); | |
854 | } | |
855 | if (comment) | |
856 | xfree(comment); | |
857 | ||
858 | printf("failed to read v2 public key from %s.\n", identity_file); | |
859 | exit(1); | |
860 | } | |
0fff78ff | 861 | |
3c0ef626 | 862 | /* |
863 | * Change the comment of a private key file. | |
864 | */ | |
865 | static void | |
866 | do_change_comment(struct passwd *pw) | |
867 | { | |
868 | char new_comment[1024], *comment, *passphrase; | |
869 | Key *private; | |
870 | Key *public; | |
871 | struct stat st; | |
872 | FILE *f; | |
873 | int fd; | |
874 | ||
875 | if (!have_identity) | |
876 | ask_filename(pw, "Enter file in which the key is"); | |
877 | if (stat(identity_file, &st) < 0) { | |
878 | perror(identity_file); | |
879 | exit(1); | |
880 | } | |
881 | private = key_load_private(identity_file, "", &comment); | |
882 | if (private == NULL) { | |
883 | if (identity_passphrase) | |
884 | passphrase = xstrdup(identity_passphrase); | |
885 | else if (identity_new_passphrase) | |
886 | passphrase = xstrdup(identity_new_passphrase); | |
887 | else | |
888 | passphrase = read_passphrase("Enter passphrase: ", | |
889 | RP_ALLOW_STDIN); | |
890 | /* Try to load using the passphrase. */ | |
891 | private = key_load_private(identity_file, passphrase, &comment); | |
892 | if (private == NULL) { | |
893 | memset(passphrase, 0, strlen(passphrase)); | |
894 | xfree(passphrase); | |
895 | printf("Bad passphrase.\n"); | |
896 | exit(1); | |
897 | } | |
898 | } else { | |
899 | passphrase = xstrdup(""); | |
900 | } | |
901 | if (private->type != KEY_RSA1) { | |
902 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
903 | key_free(private); | |
904 | exit(1); | |
e9a17296 | 905 | } |
3c0ef626 | 906 | printf("Key now has comment '%s'\n", comment); |
907 | ||
908 | if (identity_comment) { | |
909 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
910 | } else { | |
911 | printf("Enter new comment: "); | |
912 | fflush(stdout); | |
913 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
914 | memset(passphrase, 0, strlen(passphrase)); | |
915 | key_free(private); | |
916 | exit(1); | |
917 | } | |
918 | if (strchr(new_comment, '\n')) | |
919 | *strchr(new_comment, '\n') = 0; | |
920 | } | |
921 | ||
922 | /* Save the file using the new passphrase. */ | |
923 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { | |
924 | printf("Saving the key failed: %s.\n", identity_file); | |
925 | memset(passphrase, 0, strlen(passphrase)); | |
926 | xfree(passphrase); | |
927 | key_free(private); | |
928 | xfree(comment); | |
929 | exit(1); | |
930 | } | |
931 | memset(passphrase, 0, strlen(passphrase)); | |
932 | xfree(passphrase); | |
933 | public = key_from_private(private); | |
934 | key_free(private); | |
935 | ||
936 | strlcat(identity_file, ".pub", sizeof(identity_file)); | |
937 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); | |
938 | if (fd == -1) { | |
939 | printf("Could not save your public key in %s\n", identity_file); | |
940 | exit(1); | |
941 | } | |
942 | f = fdopen(fd, "w"); | |
943 | if (f == NULL) { | |
944 | printf("fdopen %s failed", identity_file); | |
945 | exit(1); | |
946 | } | |
947 | if (!key_write(public, f)) | |
948 | fprintf(stderr, "write key failed"); | |
949 | key_free(public); | |
950 | fprintf(f, " %s\n", new_comment); | |
951 | fclose(f); | |
952 | ||
953 | xfree(comment); | |
954 | ||
955 | printf("The comment in your key file has been changed.\n"); | |
956 | exit(0); | |
957 | } | |
958 | ||
959 | static void | |
960 | usage(void) | |
961 | { | |
962 | fprintf(stderr, "Usage: %s [options]\n", __progname); | |
963 | fprintf(stderr, "Options:\n"); | |
665a873d | 964 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
965 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
3c0ef626 | 966 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
665a873d | 967 | fprintf(stderr, " -C comment Provide new comment.\n"); |
3c0ef626 | 968 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
665a873d | 969 | #ifdef SMARTCARD |
970 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
971 | #endif /* SMARTCARD */ | |
3c0ef626 | 972 | fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n"); |
665a873d | 973 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
3c0ef626 | 974 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
665a873d | 975 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
0fff78ff | 976 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
665a873d | 977 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
3c0ef626 | 978 | fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n"); |
979 | fprintf(stderr, " -l Show fingerprint of key file.\n"); | |
665a873d | 980 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
3c0ef626 | 981 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
982 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
665a873d | 983 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
984 | fprintf(stderr, " -q Quiet.\n"); | |
985 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
0fff78ff | 986 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
665a873d | 987 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
988 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
989 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
3c0ef626 | 990 | #ifdef SMARTCARD |
3c0ef626 | 991 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
992 | #endif /* SMARTCARD */ | |
665a873d | 993 | fprintf(stderr, " -v Verbose.\n"); |
994 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
995 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
0fff78ff | 996 | |
3c0ef626 | 997 | exit(1); |
998 | } | |
999 | ||
1000 | /* | |
1001 | * Main program for key management. | |
1002 | */ | |
1003 | int | |
1004 | main(int ac, char **av) | |
1005 | { | |
e9a17296 | 1006 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
0fff78ff | 1007 | char out_file[MAXPATHLEN], *reader_id = NULL; |
996d5e62 | 1008 | char *rr_hostname = NULL; |
3c0ef626 | 1009 | Key *private, *public; |
1010 | struct passwd *pw; | |
1011 | struct stat st; | |
665a873d | 1012 | int opt, type, fd, download = 0; |
1013 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; | |
0fff78ff | 1014 | int do_gen_candidates = 0, do_screen_candidates = 0; |
cdd66111 | 1015 | int log_level = SYSLOG_LEVEL_INFO; |
0fff78ff | 1016 | BIGNUM *start = NULL; |
3c0ef626 | 1017 | FILE *f; |
665a873d | 1018 | const char *errstr; |
3c0ef626 | 1019 | |
1020 | extern int optind; | |
1021 | extern char *optarg; | |
1022 | ||
2c06c99b | 1023 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1024 | sanitise_stdfd(); | |
1025 | ||
0fff78ff | 1026 | __progname = ssh_get_progname(av[0]); |
3c0ef626 | 1027 | |
1028 | SSLeay_add_all_algorithms(); | |
0fff78ff | 1029 | log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
1030 | ||
41b2f314 | 1031 | init_rng(); |
1032 | seed_rng(); | |
3c0ef626 | 1033 | |
1034 | /* we need this for the home * directory. */ | |
1035 | pw = getpwuid(getuid()); | |
1036 | if (!pw) { | |
1037 | printf("You don't exist, go away!\n"); | |
1038 | exit(1); | |
1039 | } | |
1040 | if (gethostname(hostname, sizeof(hostname)) < 0) { | |
1041 | perror("gethostname"); | |
1042 | exit(1); | |
1043 | } | |
1044 | ||
0fff78ff | 1045 | while ((opt = getopt(ac, av, |
996d5e62 | 1046 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
3c0ef626 | 1047 | switch (opt) { |
1048 | case 'b': | |
2c06c99b | 1049 | bits = strtonum(optarg, 768, 32768, &errstr); |
665a873d | 1050 | if (errstr) |
1051 | fatal("Bits has bad value %s (%s)", | |
1052 | optarg, errstr); | |
3c0ef626 | 1053 | break; |
996d5e62 | 1054 | case 'F': |
1055 | find_host = 1; | |
1056 | rr_hostname = optarg; | |
1057 | break; | |
1058 | case 'H': | |
1059 | hash_hosts = 1; | |
1060 | break; | |
1061 | case 'R': | |
1062 | delete_host = 1; | |
1063 | rr_hostname = optarg; | |
1064 | break; | |
3c0ef626 | 1065 | case 'l': |
1066 | print_fingerprint = 1; | |
1067 | break; | |
1068 | case 'B': | |
1069 | print_bubblebabble = 1; | |
1070 | break; | |
1071 | case 'p': | |
1072 | change_passphrase = 1; | |
1073 | break; | |
1074 | case 'c': | |
1075 | change_comment = 1; | |
1076 | break; | |
1077 | case 'f': | |
665a873d | 1078 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1079 | sizeof(identity_file)) | |
1080 | fatal("Identity filename too long"); | |
3c0ef626 | 1081 | have_identity = 1; |
1082 | break; | |
0fff78ff | 1083 | case 'g': |
1084 | print_generic = 1; | |
1085 | break; | |
3c0ef626 | 1086 | case 'P': |
1087 | identity_passphrase = optarg; | |
1088 | break; | |
1089 | case 'N': | |
1090 | identity_new_passphrase = optarg; | |
1091 | break; | |
1092 | case 'C': | |
1093 | identity_comment = optarg; | |
1094 | break; | |
1095 | case 'q': | |
1096 | quiet = 1; | |
1097 | break; | |
3c0ef626 | 1098 | case 'e': |
1099 | case 'x': | |
1100 | /* export key */ | |
1101 | convert_to_ssh2 = 1; | |
1102 | break; | |
1103 | case 'i': | |
1104 | case 'X': | |
1105 | /* import key */ | |
1106 | convert_from_ssh2 = 1; | |
1107 | break; | |
1108 | case 'y': | |
1109 | print_public = 1; | |
1110 | break; | |
1111 | case 'd': | |
1112 | key_type_name = "dsa"; | |
1113 | break; | |
1114 | case 't': | |
1115 | key_type_name = optarg; | |
1116 | break; | |
1117 | case 'D': | |
1118 | download = 1; | |
1119 | case 'U': | |
1120 | reader_id = optarg; | |
1121 | break; | |
cdd66111 | 1122 | case 'v': |
1123 | if (log_level == SYSLOG_LEVEL_INFO) | |
1124 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1125 | else { | |
c9f39d2c | 1126 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
cdd66111 | 1127 | log_level < SYSLOG_LEVEL_DEBUG3) |
1128 | log_level++; | |
1129 | } | |
1130 | break; | |
0fff78ff | 1131 | case 'r': |
996d5e62 | 1132 | rr_hostname = optarg; |
0fff78ff | 1133 | break; |
1134 | case 'W': | |
665a873d | 1135 | generator_wanted = strtonum(optarg, 1, UINT_MAX, &errstr); |
1136 | if (errstr) | |
1137 | fatal("Desired generator has bad value: %s (%s)", | |
1138 | optarg, errstr); | |
0fff78ff | 1139 | break; |
1140 | case 'a': | |
665a873d | 1141 | trials = strtonum(optarg, 1, UINT_MAX, &errstr); |
1142 | if (errstr) | |
1143 | fatal("Invalid number of trials: %s (%s)", | |
1144 | optarg, errstr); | |
0fff78ff | 1145 | break; |
1146 | case 'M': | |
665a873d | 1147 | memory = strtonum(optarg, 1, UINT_MAX, &errstr); |
1148 | if (errstr) { | |
1149 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1150 | } | |
0fff78ff | 1151 | break; |
1152 | case 'G': | |
1153 | do_gen_candidates = 1; | |
665a873d | 1154 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1155 | sizeof(out_file)) | |
1156 | fatal("Output filename too long"); | |
0fff78ff | 1157 | break; |
1158 | case 'T': | |
1159 | do_screen_candidates = 1; | |
665a873d | 1160 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1161 | sizeof(out_file)) | |
1162 | fatal("Output filename too long"); | |
0fff78ff | 1163 | break; |
1164 | case 'S': | |
1165 | /* XXX - also compare length against bits */ | |
1166 | if (BN_hex2bn(&start, optarg) == 0) | |
1167 | fatal("Invalid start point."); | |
1168 | break; | |
3c0ef626 | 1169 | case '?': |
1170 | default: | |
1171 | usage(); | |
1172 | } | |
1173 | } | |
cdd66111 | 1174 | |
1175 | /* reinit */ | |
1176 | log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1); | |
1177 | ||
3c0ef626 | 1178 | if (optind < ac) { |
1179 | printf("Too many arguments.\n"); | |
1180 | usage(); | |
1181 | } | |
1182 | if (change_passphrase && change_comment) { | |
1183 | printf("Can only have one of -p and -c.\n"); | |
1184 | usage(); | |
1185 | } | |
996d5e62 | 1186 | if (delete_host || hash_hosts || find_host) |
1187 | do_known_hosts(pw, rr_hostname); | |
3c0ef626 | 1188 | if (print_fingerprint || print_bubblebabble) |
1189 | do_fingerprint(pw); | |
1190 | if (change_passphrase) | |
1191 | do_change_passphrase(pw); | |
700318f3 | 1192 | if (change_comment) |
1193 | do_change_comment(pw); | |
41b2f314 | 1194 | if (convert_to_ssh2) |
1195 | do_convert_to_ssh2(pw); | |
1196 | if (convert_from_ssh2) | |
1197 | do_convert_from_ssh2(pw); | |
3c0ef626 | 1198 | if (print_public) |
1199 | do_print_public(pw); | |
996d5e62 | 1200 | if (rr_hostname != NULL) { |
1201 | do_print_resource_record(pw, rr_hostname); | |
0fff78ff | 1202 | } |
3c0ef626 | 1203 | if (reader_id != NULL) { |
1204 | #ifdef SMARTCARD | |
1205 | if (download) | |
1206 | do_download(pw, reader_id); | |
1207 | else | |
1208 | do_upload(pw, reader_id); | |
1209 | #else /* SMARTCARD */ | |
1210 | fatal("no support for smartcards."); | |
1211 | #endif /* SMARTCARD */ | |
1212 | } | |
1213 | ||
0fff78ff | 1214 | if (do_gen_candidates) { |
1215 | FILE *out = fopen(out_file, "w"); | |
cdd66111 | 1216 | |
0fff78ff | 1217 | if (out == NULL) { |
1218 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1219 | out_file, strerror(errno)); | |
1220 | return (1); | |
1221 | } | |
2c06c99b | 1222 | if (bits == 0) |
1223 | bits = DEFAULT_BITS; | |
0fff78ff | 1224 | if (gen_candidates(out, memory, bits, start) != 0) |
2c06c99b | 1225 | fatal("modulus candidate generation failed"); |
0fff78ff | 1226 | |
1227 | return (0); | |
1228 | } | |
1229 | ||
1230 | if (do_screen_candidates) { | |
1231 | FILE *in; | |
1232 | FILE *out = fopen(out_file, "w"); | |
1233 | ||
1234 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1235 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1236 | fatal("Couldn't open modulus candidate " | |
cdd66111 | 1237 | "file \"%s\": %s", identity_file, |
0fff78ff | 1238 | strerror(errno)); |
1239 | } | |
1240 | } else | |
1241 | in = stdin; | |
1242 | ||
1243 | if (out == NULL) { | |
1244 | fatal("Couldn't open moduli file \"%s\": %s", | |
1245 | out_file, strerror(errno)); | |
1246 | } | |
1247 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
2c06c99b | 1248 | fatal("modulus screening failed"); |
0fff78ff | 1249 | return (0); |
1250 | } | |
1251 | ||
3c0ef626 | 1252 | arc4random_stir(); |
1253 | ||
2c06c99b | 1254 | if (key_type_name == NULL) |
1255 | key_type_name = "rsa"; | |
1256 | ||
3c0ef626 | 1257 | type = key_type_from_name(key_type_name); |
1258 | if (type == KEY_UNSPEC) { | |
1259 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1260 | exit(1); | |
1261 | } | |
2c06c99b | 1262 | if (bits == 0) |
1263 | bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; | |
1264 | if (type == KEY_DSA && bits != 1024) | |
1265 | fatal("DSA keys must be 1024 bits"); | |
3c0ef626 | 1266 | if (!quiet) |
1267 | printf("Generating public/private %s key pair.\n", key_type_name); | |
1268 | private = key_generate(type, bits); | |
1269 | if (private == NULL) { | |
1270 | fprintf(stderr, "key_generate failed"); | |
1271 | exit(1); | |
1272 | } | |
1273 | public = key_from_private(private); | |
1274 | ||
1275 | if (!have_identity) | |
1276 | ask_filename(pw, "Enter file in which to save the key"); | |
1277 | ||
2c06c99b | 1278 | /* Create ~/.ssh directory if it doesn't already exist. */ |
3c0ef626 | 1279 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
1280 | if (strstr(identity_file, dotsshdir) != NULL && | |
1281 | stat(dotsshdir, &st) < 0) { | |
1282 | if (mkdir(dotsshdir, 0700) < 0) | |
1283 | error("Could not create directory '%s'.", dotsshdir); | |
1284 | else if (!quiet) | |
1285 | printf("Created directory '%s'.\n", dotsshdir); | |
1286 | } | |
1287 | /* If the file already exists, ask the user to confirm. */ | |
1288 | if (stat(identity_file, &st) >= 0) { | |
1289 | char yesno[3]; | |
1290 | printf("%s already exists.\n", identity_file); | |
1291 | printf("Overwrite (y/n)? "); | |
1292 | fflush(stdout); | |
1293 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1294 | exit(1); | |
1295 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1296 | exit(1); | |
1297 | } | |
1298 | /* Ask for a passphrase (twice). */ | |
1299 | if (identity_passphrase) | |
1300 | passphrase1 = xstrdup(identity_passphrase); | |
1301 | else if (identity_new_passphrase) | |
1302 | passphrase1 = xstrdup(identity_new_passphrase); | |
1303 | else { | |
1304 | passphrase_again: | |
1305 | passphrase1 = | |
1306 | read_passphrase("Enter passphrase (empty for no " | |
1307 | "passphrase): ", RP_ALLOW_STDIN); | |
1308 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1309 | RP_ALLOW_STDIN); | |
1310 | if (strcmp(passphrase1, passphrase2) != 0) { | |
1311 | /* | |
1312 | * The passphrases do not match. Clear them and | |
1313 | * retry. | |
1314 | */ | |
1315 | memset(passphrase1, 0, strlen(passphrase1)); | |
1316 | memset(passphrase2, 0, strlen(passphrase2)); | |
1317 | xfree(passphrase1); | |
1318 | xfree(passphrase2); | |
1319 | printf("Passphrases do not match. Try again.\n"); | |
1320 | goto passphrase_again; | |
1321 | } | |
1322 | /* Clear the other copy of the passphrase. */ | |
1323 | memset(passphrase2, 0, strlen(passphrase2)); | |
1324 | xfree(passphrase2); | |
1325 | } | |
1326 | ||
1327 | if (identity_comment) { | |
1328 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1329 | } else { | |
1330 | /* Create default commend field for the passphrase. */ | |
1331 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); | |
1332 | } | |
1333 | ||
1334 | /* Save the key with the given passphrase and comment. */ | |
1335 | if (!key_save_private(private, identity_file, passphrase1, comment)) { | |
1336 | printf("Saving the key failed: %s.\n", identity_file); | |
1337 | memset(passphrase1, 0, strlen(passphrase1)); | |
1338 | xfree(passphrase1); | |
1339 | exit(1); | |
1340 | } | |
1341 | /* Clear the passphrase. */ | |
1342 | memset(passphrase1, 0, strlen(passphrase1)); | |
1343 | xfree(passphrase1); | |
1344 | ||
1345 | /* Clear the private key and the random number generator. */ | |
1346 | key_free(private); | |
1347 | arc4random_stir(); | |
1348 | ||
1349 | if (!quiet) | |
1350 | printf("Your identification has been saved in %s.\n", identity_file); | |
1351 | ||
1352 | strlcat(identity_file, ".pub", sizeof(identity_file)); | |
1353 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); | |
1354 | if (fd == -1) { | |
1355 | printf("Could not save your public key in %s\n", identity_file); | |
1356 | exit(1); | |
1357 | } | |
1358 | f = fdopen(fd, "w"); | |
1359 | if (f == NULL) { | |
1360 | printf("fdopen %s failed", identity_file); | |
1361 | exit(1); | |
1362 | } | |
1363 | if (!key_write(public, f)) | |
1364 | fprintf(stderr, "write key failed"); | |
1365 | fprintf(f, " %s\n", comment); | |
1366 | fclose(f); | |
1367 | ||
1368 | if (!quiet) { | |
1369 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); | |
1370 | printf("Your public key has been saved in %s.\n", | |
1371 | identity_file); | |
1372 | printf("The key fingerprint is:\n"); | |
1373 | printf("%s %s\n", fp, comment); | |
1374 | xfree(fp); | |
1375 | } | |
1376 | ||
1377 | key_free(public); | |
1378 | exit(0); | |
1379 | } |