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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" | |
34fee935 | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.128 2005/07/17 07:17:55 djm 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" | |
1b56ff3d | 29 | #include "misc.h" |
34fee935 | 30 | #include "match.h" |
31 | #include "hostfile.h" | |
3c0ef626 | 32 | |
33 | #ifdef SMARTCARD | |
3c0ef626 | 34 | #include "scard.h" |
35 | #endif | |
70791e56 | 36 | #include "dns.h" |
3c0ef626 | 37 | |
38 | /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ | |
34fee935 | 39 | u_int32_t bits = 2048; |
3c0ef626 | 40 | |
41 | /* | |
42 | * Flag indicating that we just want to change the passphrase. This can be | |
43 | * set on the command line. | |
44 | */ | |
45 | int change_passphrase = 0; | |
46 | ||
47 | /* | |
48 | * Flag indicating that we just want to change the comment. This can be set | |
49 | * on the command line. | |
50 | */ | |
51 | int change_comment = 0; | |
52 | ||
53 | int quiet = 0; | |
54 | ||
34fee935 | 55 | /* Flag indicating that we want to hash a known_hosts file */ |
56 | int hash_hosts = 0; | |
57 | /* Flag indicating that we want lookup a host in known_hosts file */ | |
58 | int find_host = 0; | |
59 | /* Flag indicating that we want to delete a host from a known_hosts file */ | |
60 | int delete_host = 0; | |
61 | ||
3c0ef626 | 62 | /* Flag indicating that we just want to see the key fingerprint */ |
63 | int print_fingerprint = 0; | |
64 | int print_bubblebabble = 0; | |
65 | ||
66 | /* The identity file name, given on the command line or entered by the user. */ | |
67 | char identity_file[1024]; | |
68 | int have_identity = 0; | |
69 | ||
70 | /* This is set to the passphrase if given on the command line. */ | |
71 | char *identity_passphrase = NULL; | |
72 | ||
73 | /* This is set to the new passphrase if given on the command line. */ | |
74 | char *identity_new_passphrase = NULL; | |
75 | ||
76 | /* This is set to the new comment if given on the command line. */ | |
77 | char *identity_comment = NULL; | |
78 | ||
79 | /* Dump public key file in format used by real and the original SSH 2 */ | |
80 | int convert_to_ssh2 = 0; | |
81 | int convert_from_ssh2 = 0; | |
82 | int print_public = 0; | |
70791e56 | 83 | int print_generic = 0; |
3c0ef626 | 84 | |
e9a17296 | 85 | char *key_type_name = NULL; |
3c0ef626 | 86 | |
87 | /* argv0 */ | |
3c0ef626 | 88 | extern char *__progname; |
3c0ef626 | 89 | |
90 | char hostname[MAXHOSTNAMELEN]; | |
91 | ||
1b56ff3d | 92 | /* moduli.c */ |
34fee935 | 93 | int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
1b56ff3d | 94 | int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
95 | ||
3c0ef626 | 96 | static void |
97 | ask_filename(struct passwd *pw, const char *prompt) | |
98 | { | |
99 | char buf[1024]; | |
100 | char *name = NULL; | |
101 | ||
e9a17296 | 102 | if (key_type_name == NULL) |
3c0ef626 | 103 | name = _PATH_SSH_CLIENT_ID_RSA; |
e9a17296 | 104 | else |
105 | switch (key_type_from_name(key_type_name)) { | |
106 | case KEY_RSA1: | |
107 | name = _PATH_SSH_CLIENT_IDENTITY; | |
108 | break; | |
109 | case KEY_DSA: | |
110 | name = _PATH_SSH_CLIENT_ID_DSA; | |
111 | break; | |
112 | case KEY_RSA: | |
113 | name = _PATH_SSH_CLIENT_ID_RSA; | |
114 | break; | |
115 | default: | |
116 | fprintf(stderr, "bad key type"); | |
117 | exit(1); | |
118 | break; | |
119 | } | |
120 | ||
3c0ef626 | 121 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
122 | fprintf(stderr, "%s (%s): ", prompt, identity_file); | |
3c0ef626 | 123 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
124 | exit(1); | |
125 | if (strchr(buf, '\n')) | |
126 | *strchr(buf, '\n') = 0; | |
127 | if (strcmp(buf, "") != 0) | |
128 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
129 | have_identity = 1; | |
130 | } | |
131 | ||
132 | static Key * | |
133 | load_identity(char *filename) | |
134 | { | |
135 | char *pass; | |
136 | Key *prv; | |
137 | ||
138 | prv = key_load_private(filename, "", NULL); | |
139 | if (prv == NULL) { | |
140 | if (identity_passphrase) | |
141 | pass = xstrdup(identity_passphrase); | |
142 | else | |
143 | pass = read_passphrase("Enter passphrase: ", | |
144 | RP_ALLOW_STDIN); | |
145 | prv = key_load_private(filename, pass, NULL); | |
146 | memset(pass, 0, strlen(pass)); | |
147 | xfree(pass); | |
148 | } | |
149 | return prv; | |
150 | } | |
151 | ||
152 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" | |
ff2d7a98 | 153 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
3c0ef626 | 154 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
155 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb | |
156 | ||
157 | static void | |
158 | do_convert_to_ssh2(struct passwd *pw) | |
159 | { | |
160 | Key *k; | |
e9a17296 | 161 | u_int len; |
3c0ef626 | 162 | u_char *blob; |
163 | struct stat st; | |
164 | ||
165 | if (!have_identity) | |
166 | ask_filename(pw, "Enter file in which the key is"); | |
167 | if (stat(identity_file, &st) < 0) { | |
168 | perror(identity_file); | |
169 | exit(1); | |
170 | } | |
171 | if ((k = key_load_public(identity_file, NULL)) == NULL) { | |
172 | if ((k = load_identity(identity_file)) == NULL) { | |
173 | fprintf(stderr, "load failed\n"); | |
174 | exit(1); | |
175 | } | |
176 | } | |
70791e56 | 177 | if (k->type == KEY_RSA1) { |
178 | fprintf(stderr, "version 1 keys are not supported\n"); | |
179 | exit(1); | |
180 | } | |
3c0ef626 | 181 | if (key_to_blob(k, &blob, &len) <= 0) { |
182 | fprintf(stderr, "key_to_blob failed\n"); | |
183 | exit(1); | |
184 | } | |
185 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); | |
186 | fprintf(stdout, | |
ff2d7a98 | 187 | "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", |
3c0ef626 | 188 | key_size(k), key_type(k), |
189 | pw->pw_name, hostname); | |
190 | dump_base64(stdout, blob, len); | |
191 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); | |
192 | key_free(k); | |
193 | xfree(blob); | |
194 | exit(0); | |
195 | } | |
196 | ||
197 | static void | |
198 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) | |
199 | { | |
1b56ff3d | 200 | u_int bignum_bits = buffer_get_int(b); |
201 | u_int bytes = (bignum_bits + 7) / 8; | |
3c0ef626 | 202 | |
203 | if (buffer_len(b) < bytes) | |
204 | fatal("buffer_get_bignum_bits: input buffer too small: " | |
205 | "need %d have %d", bytes, buffer_len(b)); | |
e9a17296 | 206 | BN_bin2bn(buffer_ptr(b), bytes, value); |
3c0ef626 | 207 | buffer_consume(b, bytes); |
208 | } | |
209 | ||
210 | static Key * | |
e9a17296 | 211 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
3c0ef626 | 212 | { |
213 | Buffer b; | |
214 | Key *key = NULL; | |
215 | char *type, *cipher; | |
216 | u_char *sig, data[] = "abcde12345"; | |
217 | int magic, rlen, ktype, i1, i2, i3, i4; | |
218 | u_int slen; | |
219 | u_long e; | |
220 | ||
221 | buffer_init(&b); | |
222 | buffer_append(&b, blob, blen); | |
223 | ||
224 | magic = buffer_get_int(&b); | |
225 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
226 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
227 | buffer_free(&b); | |
228 | return NULL; | |
229 | } | |
230 | i1 = buffer_get_int(&b); | |
231 | type = buffer_get_string(&b, NULL); | |
232 | cipher = buffer_get_string(&b, NULL); | |
233 | i2 = buffer_get_int(&b); | |
234 | i3 = buffer_get_int(&b); | |
235 | i4 = buffer_get_int(&b); | |
236 | debug("ignore (%d %d %d %d)", i1,i2,i3,i4); | |
237 | if (strcmp(cipher, "none") != 0) { | |
238 | error("unsupported cipher %s", cipher); | |
239 | xfree(cipher); | |
240 | buffer_free(&b); | |
241 | xfree(type); | |
242 | return NULL; | |
243 | } | |
244 | xfree(cipher); | |
245 | ||
246 | if (strstr(type, "dsa")) { | |
247 | ktype = KEY_DSA; | |
248 | } else if (strstr(type, "rsa")) { | |
249 | ktype = KEY_RSA; | |
250 | } else { | |
34fee935 | 251 | buffer_free(&b); |
3c0ef626 | 252 | xfree(type); |
253 | return NULL; | |
254 | } | |
255 | key = key_new_private(ktype); | |
256 | xfree(type); | |
257 | ||
258 | switch (key->type) { | |
259 | case KEY_DSA: | |
260 | buffer_get_bignum_bits(&b, key->dsa->p); | |
261 | buffer_get_bignum_bits(&b, key->dsa->g); | |
262 | buffer_get_bignum_bits(&b, key->dsa->q); | |
263 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
264 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
265 | break; | |
266 | case KEY_RSA: | |
267 | e = buffer_get_char(&b); | |
268 | debug("e %lx", e); | |
269 | if (e < 30) { | |
270 | e <<= 8; | |
271 | e += buffer_get_char(&b); | |
272 | debug("e %lx", e); | |
273 | e <<= 8; | |
274 | e += buffer_get_char(&b); | |
275 | debug("e %lx", e); | |
276 | } | |
277 | if (!BN_set_word(key->rsa->e, e)) { | |
278 | buffer_free(&b); | |
279 | key_free(key); | |
280 | return NULL; | |
281 | } | |
282 | buffer_get_bignum_bits(&b, key->rsa->d); | |
283 | buffer_get_bignum_bits(&b, key->rsa->n); | |
284 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
285 | buffer_get_bignum_bits(&b, key->rsa->q); | |
286 | buffer_get_bignum_bits(&b, key->rsa->p); | |
287 | rsa_generate_additional_parameters(key->rsa); | |
288 | break; | |
289 | } | |
290 | rlen = buffer_len(&b); | |
e9a17296 | 291 | if (rlen != 0) |
3c0ef626 | 292 | error("do_convert_private_ssh2_from_blob: " |
293 | "remaining bytes in key blob %d", rlen); | |
294 | buffer_free(&b); | |
295 | ||
296 | /* try the key */ | |
297 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
298 | key_verify(key, sig, slen, data, sizeof(data)); | |
299 | xfree(sig); | |
300 | return key; | |
301 | } | |
302 | ||
303 | static void | |
304 | do_convert_from_ssh2(struct passwd *pw) | |
305 | { | |
306 | Key *k; | |
307 | int blen; | |
2980ea68 | 308 | u_int len; |
3c0ef626 | 309 | char line[1024], *p; |
310 | u_char blob[8096]; | |
311 | char encoded[8096]; | |
312 | struct stat st; | |
313 | int escaped = 0, private = 0, ok; | |
314 | FILE *fp; | |
315 | ||
316 | if (!have_identity) | |
317 | ask_filename(pw, "Enter file in which the key is"); | |
318 | if (stat(identity_file, &st) < 0) { | |
319 | perror(identity_file); | |
320 | exit(1); | |
321 | } | |
322 | fp = fopen(identity_file, "r"); | |
323 | if (fp == NULL) { | |
324 | perror(identity_file); | |
325 | exit(1); | |
326 | } | |
327 | encoded[0] = '\0'; | |
328 | while (fgets(line, sizeof(line), fp)) { | |
329 | if (!(p = strchr(line, '\n'))) { | |
330 | fprintf(stderr, "input line too long.\n"); | |
331 | exit(1); | |
332 | } | |
333 | if (p > line && p[-1] == '\\') | |
334 | escaped++; | |
335 | if (strncmp(line, "----", 4) == 0 || | |
336 | strstr(line, ": ") != NULL) { | |
337 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) | |
338 | private = 1; | |
339 | if (strstr(line, " END ") != NULL) { | |
340 | break; | |
341 | } | |
342 | /* fprintf(stderr, "ignore: %s", line); */ | |
343 | continue; | |
344 | } | |
345 | if (escaped) { | |
346 | escaped--; | |
347 | /* fprintf(stderr, "escaped: %s", line); */ | |
348 | continue; | |
349 | } | |
350 | *p = '\0'; | |
351 | strlcat(encoded, line, sizeof(encoded)); | |
352 | } | |
2980ea68 | 353 | len = strlen(encoded); |
354 | if (((len % 4) == 3) && | |
355 | (encoded[len-1] == '=') && | |
356 | (encoded[len-2] == '=') && | |
357 | (encoded[len-3] == '=')) | |
358 | encoded[len-3] = '\0'; | |
e9a17296 | 359 | blen = uudecode(encoded, blob, sizeof(blob)); |
3c0ef626 | 360 | if (blen < 0) { |
361 | fprintf(stderr, "uudecode failed.\n"); | |
362 | exit(1); | |
363 | } | |
364 | k = private ? | |
365 | do_convert_private_ssh2_from_blob(blob, blen) : | |
366 | key_from_blob(blob, blen); | |
367 | if (k == NULL) { | |
368 | fprintf(stderr, "decode blob failed.\n"); | |
369 | exit(1); | |
370 | } | |
371 | ok = private ? | |
372 | (k->type == KEY_DSA ? | |
373 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
374 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
375 | key_write(k, stdout); | |
376 | if (!ok) { | |
377 | fprintf(stderr, "key write failed"); | |
378 | exit(1); | |
379 | } | |
380 | key_free(k); | |
e9a17296 | 381 | if (!private) |
382 | fprintf(stdout, "\n"); | |
3c0ef626 | 383 | fclose(fp); |
384 | exit(0); | |
385 | } | |
386 | ||
387 | static void | |
388 | do_print_public(struct passwd *pw) | |
389 | { | |
390 | Key *prv; | |
391 | struct stat st; | |
392 | ||
393 | if (!have_identity) | |
394 | ask_filename(pw, "Enter file in which the key is"); | |
395 | if (stat(identity_file, &st) < 0) { | |
396 | perror(identity_file); | |
397 | exit(1); | |
398 | } | |
399 | prv = load_identity(identity_file); | |
400 | if (prv == NULL) { | |
401 | fprintf(stderr, "load failed\n"); | |
402 | exit(1); | |
403 | } | |
404 | if (!key_write(prv, stdout)) | |
405 | fprintf(stderr, "key_write failed"); | |
406 | key_free(prv); | |
407 | fprintf(stdout, "\n"); | |
408 | exit(0); | |
409 | } | |
410 | ||
411 | #ifdef SMARTCARD | |
3c0ef626 | 412 | static void |
413 | do_upload(struct passwd *pw, const char *sc_reader_id) | |
414 | { | |
415 | Key *prv = NULL; | |
416 | struct stat st; | |
2980ea68 | 417 | int ret; |
418 | ||
3c0ef626 | 419 | if (!have_identity) |
420 | ask_filename(pw, "Enter file in which the key is"); | |
421 | if (stat(identity_file, &st) < 0) { | |
422 | perror(identity_file); | |
2980ea68 | 423 | exit(1); |
3c0ef626 | 424 | } |
425 | prv = load_identity(identity_file); | |
426 | if (prv == NULL) { | |
427 | error("load failed"); | |
2980ea68 | 428 | exit(1); |
3c0ef626 | 429 | } |
2980ea68 | 430 | ret = sc_put_key(prv, sc_reader_id); |
431 | key_free(prv); | |
432 | if (ret < 0) | |
433 | exit(1); | |
70791e56 | 434 | logit("loading key done"); |
2980ea68 | 435 | exit(0); |
3c0ef626 | 436 | } |
437 | ||
438 | static void | |
439 | do_download(struct passwd *pw, const char *sc_reader_id) | |
440 | { | |
2980ea68 | 441 | Key **keys = NULL; |
442 | int i; | |
3c0ef626 | 443 | |
2980ea68 | 444 | keys = sc_get_keys(sc_reader_id, NULL); |
445 | if (keys == NULL) | |
3c0ef626 | 446 | fatal("cannot read public key from smartcard"); |
2980ea68 | 447 | for (i = 0; keys[i]; i++) { |
448 | key_write(keys[i], stdout); | |
449 | key_free(keys[i]); | |
450 | fprintf(stdout, "\n"); | |
451 | } | |
452 | xfree(keys); | |
3c0ef626 | 453 | exit(0); |
454 | } | |
455 | #endif /* SMARTCARD */ | |
456 | ||
457 | static void | |
458 | do_fingerprint(struct passwd *pw) | |
459 | { | |
460 | FILE *f; | |
461 | Key *public; | |
462 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; | |
e9a17296 | 463 | int i, skip = 0, num = 1, invalid = 1; |
464 | enum fp_rep rep; | |
465 | enum fp_type fptype; | |
3c0ef626 | 466 | struct stat st; |
467 | ||
468 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; | |
469 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
470 | ||
471 | if (!have_identity) | |
472 | ask_filename(pw, "Enter file in which the key is"); | |
473 | if (stat(identity_file, &st) < 0) { | |
474 | perror(identity_file); | |
475 | exit(1); | |
476 | } | |
477 | public = key_load_public(identity_file, &comment); | |
478 | if (public != NULL) { | |
479 | fp = key_fingerprint(public, fptype, rep); | |
ff2d7a98 | 480 | printf("%u %s %s\n", key_size(public), fp, comment); |
3c0ef626 | 481 | key_free(public); |
482 | xfree(comment); | |
483 | xfree(fp); | |
484 | exit(0); | |
485 | } | |
486 | if (comment) | |
487 | xfree(comment); | |
488 | ||
489 | f = fopen(identity_file, "r"); | |
490 | if (f != NULL) { | |
491 | while (fgets(line, sizeof(line), f)) { | |
492 | i = strlen(line) - 1; | |
493 | if (line[i] != '\n') { | |
494 | error("line %d too long: %.40s...", num, line); | |
495 | skip = 1; | |
496 | continue; | |
497 | } | |
498 | num++; | |
499 | if (skip) { | |
500 | skip = 0; | |
501 | continue; | |
502 | } | |
503 | line[i] = '\0'; | |
504 | ||
505 | /* Skip leading whitespace, empty and comment lines. */ | |
506 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
507 | ; | |
508 | if (!*cp || *cp == '\n' || *cp == '#') | |
509 | continue ; | |
510 | i = strtol(cp, &ep, 10); | |
511 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
512 | int quoted = 0; | |
513 | comment = cp; | |
ff2d7a98 | 514 | for (; *cp && (quoted || (*cp != ' ' && |
515 | *cp != '\t')); cp++) { | |
3c0ef626 | 516 | if (*cp == '\\' && cp[1] == '"') |
517 | cp++; /* Skip both */ | |
518 | else if (*cp == '"') | |
519 | quoted = !quoted; | |
520 | } | |
521 | if (!*cp) | |
522 | continue; | |
523 | *cp++ = '\0'; | |
524 | } | |
525 | ep = cp; | |
526 | public = key_new(KEY_RSA1); | |
527 | if (key_read(public, &cp) != 1) { | |
528 | cp = ep; | |
529 | key_free(public); | |
530 | public = key_new(KEY_UNSPEC); | |
531 | if (key_read(public, &cp) != 1) { | |
532 | key_free(public); | |
533 | continue; | |
534 | } | |
535 | } | |
536 | comment = *cp ? cp : comment; | |
537 | fp = key_fingerprint(public, fptype, rep); | |
ff2d7a98 | 538 | printf("%u %s %s\n", key_size(public), fp, |
3c0ef626 | 539 | comment ? comment : "no comment"); |
540 | xfree(fp); | |
541 | key_free(public); | |
542 | invalid = 0; | |
543 | } | |
544 | fclose(f); | |
545 | } | |
546 | if (invalid) { | |
547 | printf("%s is not a public key file.\n", identity_file); | |
548 | exit(1); | |
549 | } | |
550 | exit(0); | |
551 | } | |
552 | ||
34fee935 | 553 | static void |
554 | print_host(FILE *f, char *name, Key *public, int hash) | |
555 | { | |
556 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
557 | fatal("hash_host failed"); | |
558 | fprintf(f, "%s ", name); | |
559 | if (!key_write(public, f)) | |
560 | fatal("key_write failed"); | |
561 | fprintf(f, "\n"); | |
562 | } | |
563 | ||
564 | static void | |
565 | do_known_hosts(struct passwd *pw, const char *name) | |
566 | { | |
567 | FILE *in, *out = stdout; | |
568 | Key *public; | |
569 | char *cp, *cp2, *kp, *kp2; | |
570 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
571 | int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; | |
572 | ||
573 | if (!have_identity) { | |
574 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
575 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
576 | sizeof(identity_file)) | |
577 | fatal("Specified known hosts path too long"); | |
578 | xfree(cp); | |
579 | have_identity = 1; | |
580 | } | |
581 | if ((in = fopen(identity_file, "r")) == NULL) | |
582 | fatal("fopen: %s", strerror(errno)); | |
583 | ||
584 | /* | |
585 | * Find hosts goes to stdout, hash and deletions happen in-place | |
586 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
587 | */ | |
588 | if (!find_host && (hash_hosts || delete_host)) { | |
589 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
590 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
591 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
592 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
593 | fatal("known_hosts path too long"); | |
594 | umask(077); | |
595 | if ((c = mkstemp(tmp)) == -1) | |
596 | fatal("mkstemp: %s", strerror(errno)); | |
597 | if ((out = fdopen(c, "w")) == NULL) { | |
598 | c = errno; | |
599 | unlink(tmp); | |
600 | fatal("fdopen: %s", strerror(c)); | |
601 | } | |
602 | inplace = 1; | |
603 | } | |
604 | ||
605 | while (fgets(line, sizeof(line), in)) { | |
606 | num++; | |
607 | i = strlen(line) - 1; | |
608 | if (line[i] != '\n') { | |
609 | error("line %d too long: %.40s...", num, line); | |
610 | skip = 1; | |
611 | invalid = 1; | |
612 | continue; | |
613 | } | |
614 | if (skip) { | |
615 | skip = 0; | |
616 | continue; | |
617 | } | |
618 | line[i] = '\0'; | |
619 | ||
620 | /* Skip leading whitespace, empty and comment lines. */ | |
621 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
622 | ; | |
623 | if (!*cp || *cp == '\n' || *cp == '#') { | |
624 | if (inplace) | |
625 | fprintf(out, "%s\n", cp); | |
626 | continue; | |
627 | } | |
628 | /* Find the end of the host name portion. */ | |
629 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
630 | ; | |
631 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
632 | error("line %d missing key: %.40s...", | |
633 | num, line); | |
634 | invalid = 1; | |
635 | continue; | |
636 | } | |
637 | *kp++ = '\0'; | |
638 | kp2 = kp; | |
639 | ||
640 | public = key_new(KEY_RSA1); | |
641 | if (key_read(public, &kp) != 1) { | |
642 | kp = kp2; | |
643 | key_free(public); | |
644 | public = key_new(KEY_UNSPEC); | |
645 | if (key_read(public, &kp) != 1) { | |
646 | error("line %d invalid key: %.40s...", | |
647 | num, line); | |
648 | key_free(public); | |
649 | invalid = 1; | |
650 | continue; | |
651 | } | |
652 | } | |
653 | ||
654 | if (*cp == HASH_DELIM) { | |
655 | if (find_host || delete_host) { | |
656 | cp2 = host_hash(name, cp, strlen(cp)); | |
657 | if (cp2 == NULL) { | |
658 | error("line %d: invalid hashed " | |
659 | "name: %.64s...", num, line); | |
660 | invalid = 1; | |
661 | continue; | |
662 | } | |
663 | c = (strcmp(cp2, cp) == 0); | |
664 | if (find_host && c) { | |
665 | printf("# Host %s found: " | |
666 | "line %d type %s\n", name, | |
667 | num, key_type(public)); | |
668 | print_host(out, cp, public, 0); | |
669 | } | |
670 | if (delete_host && !c) | |
671 | print_host(out, cp, public, 0); | |
672 | } else if (hash_hosts) | |
673 | print_host(out, cp, public, 0); | |
674 | } else { | |
675 | if (find_host || delete_host) { | |
676 | c = (match_hostname(name, cp, | |
677 | strlen(cp)) == 1); | |
678 | if (find_host && c) { | |
679 | printf("# Host %s found: " | |
680 | "line %d type %s\n", name, | |
681 | num, key_type(public)); | |
682 | print_host(out, cp, public, hash_hosts); | |
683 | } | |
684 | if (delete_host && !c) | |
685 | print_host(out, cp, public, 0); | |
686 | } else if (hash_hosts) { | |
687 | for (cp2 = strsep(&cp, ","); | |
688 | cp2 != NULL && *cp2 != '\0'; | |
689 | cp2 = strsep(&cp, ",")) { | |
690 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
691 | fprintf(stderr, "Warning: " | |
692 | "ignoring host name with " | |
693 | "metacharacters: %.64s\n", | |
694 | cp2); | |
695 | else | |
696 | print_host(out, cp2, public, 1); | |
697 | } | |
698 | has_unhashed = 1; | |
699 | } | |
700 | } | |
701 | key_free(public); | |
702 | } | |
703 | fclose(in); | |
704 | ||
705 | if (invalid) { | |
706 | fprintf(stderr, "%s is not a valid known_host file.\n", | |
707 | identity_file); | |
708 | if (inplace) { | |
709 | fprintf(stderr, "Not replacing existing known_hosts " | |
710 | "file because of errors\n"); | |
711 | fclose(out); | |
712 | unlink(tmp); | |
713 | } | |
714 | exit(1); | |
715 | } | |
716 | ||
717 | if (inplace) { | |
718 | fclose(out); | |
719 | ||
720 | /* Backup existing file */ | |
721 | if (unlink(old) == -1 && errno != ENOENT) | |
722 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
723 | if (link(identity_file, old) == -1) | |
724 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
725 | strerror(errno)); | |
726 | /* Move new one into place */ | |
727 | if (rename(tmp, identity_file) == -1) { | |
728 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
729 | strerror(errno)); | |
730 | unlink(tmp); | |
731 | unlink(old); | |
732 | exit(1); | |
733 | } | |
734 | ||
735 | fprintf(stderr, "%s updated.\n", identity_file); | |
736 | fprintf(stderr, "Original contents retained as %s\n", old); | |
737 | if (has_unhashed) { | |
738 | fprintf(stderr, "WARNING: %s contains unhashed " | |
739 | "entries\n", old); | |
740 | fprintf(stderr, "Delete this file to ensure privacy " | |
741 | "of hostnames\n"); | |
742 | } | |
743 | } | |
744 | ||
745 | exit(0); | |
746 | } | |
747 | ||
3c0ef626 | 748 | /* |
749 | * Perform changing a passphrase. The argument is the passwd structure | |
750 | * for the current user. | |
751 | */ | |
752 | static void | |
753 | do_change_passphrase(struct passwd *pw) | |
754 | { | |
755 | char *comment; | |
756 | char *old_passphrase, *passphrase1, *passphrase2; | |
757 | struct stat st; | |
758 | Key *private; | |
759 | ||
760 | if (!have_identity) | |
761 | ask_filename(pw, "Enter file in which the key is"); | |
762 | if (stat(identity_file, &st) < 0) { | |
763 | perror(identity_file); | |
764 | exit(1); | |
765 | } | |
766 | /* Try to load the file with empty passphrase. */ | |
767 | private = key_load_private(identity_file, "", &comment); | |
768 | if (private == NULL) { | |
769 | if (identity_passphrase) | |
770 | old_passphrase = xstrdup(identity_passphrase); | |
771 | else | |
772 | old_passphrase = | |
773 | read_passphrase("Enter old passphrase: ", | |
774 | RP_ALLOW_STDIN); | |
775 | private = key_load_private(identity_file, old_passphrase, | |
776 | &comment); | |
777 | memset(old_passphrase, 0, strlen(old_passphrase)); | |
778 | xfree(old_passphrase); | |
779 | if (private == NULL) { | |
780 | printf("Bad passphrase.\n"); | |
781 | exit(1); | |
782 | } | |
783 | } | |
784 | printf("Key has comment '%s'\n", comment); | |
785 | ||
786 | /* Ask the new passphrase (twice). */ | |
787 | if (identity_new_passphrase) { | |
788 | passphrase1 = xstrdup(identity_new_passphrase); | |
789 | passphrase2 = NULL; | |
790 | } else { | |
791 | passphrase1 = | |
792 | read_passphrase("Enter new passphrase (empty for no " | |
793 | "passphrase): ", RP_ALLOW_STDIN); | |
794 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
e9a17296 | 795 | RP_ALLOW_STDIN); |
3c0ef626 | 796 | |
797 | /* Verify that they are the same. */ | |
798 | if (strcmp(passphrase1, passphrase2) != 0) { | |
799 | memset(passphrase1, 0, strlen(passphrase1)); | |
800 | memset(passphrase2, 0, strlen(passphrase2)); | |
801 | xfree(passphrase1); | |
802 | xfree(passphrase2); | |
803 | printf("Pass phrases do not match. Try again.\n"); | |
804 | exit(1); | |
805 | } | |
806 | /* Destroy the other copy. */ | |
807 | memset(passphrase2, 0, strlen(passphrase2)); | |
808 | xfree(passphrase2); | |
809 | } | |
810 | ||
811 | /* Save the file using the new passphrase. */ | |
812 | if (!key_save_private(private, identity_file, passphrase1, comment)) { | |
813 | printf("Saving the key failed: %s.\n", identity_file); | |
814 | memset(passphrase1, 0, strlen(passphrase1)); | |
815 | xfree(passphrase1); | |
816 | key_free(private); | |
817 | xfree(comment); | |
818 | exit(1); | |
819 | } | |
820 | /* Destroy the passphrase and the copy of the key in memory. */ | |
821 | memset(passphrase1, 0, strlen(passphrase1)); | |
822 | xfree(passphrase1); | |
823 | key_free(private); /* Destroys contents */ | |
824 | xfree(comment); | |
825 | ||
826 | printf("Your identification has been saved with the new passphrase.\n"); | |
827 | exit(0); | |
828 | } | |
829 | ||
70791e56 | 830 | /* |
831 | * Print the SSHFP RR. | |
832 | */ | |
833 | static void | |
1b56ff3d | 834 | do_print_resource_record(struct passwd *pw, char *hname) |
70791e56 | 835 | { |
836 | Key *public; | |
837 | char *comment = NULL; | |
838 | struct stat st; | |
839 | ||
840 | if (!have_identity) | |
841 | ask_filename(pw, "Enter file in which the key is"); | |
842 | if (stat(identity_file, &st) < 0) { | |
843 | perror(identity_file); | |
844 | exit(1); | |
845 | } | |
846 | public = key_load_public(identity_file, &comment); | |
847 | if (public != NULL) { | |
1b56ff3d | 848 | export_dns_rr(hname, public, stdout, print_generic); |
70791e56 | 849 | key_free(public); |
850 | xfree(comment); | |
851 | exit(0); | |
852 | } | |
853 | if (comment) | |
854 | xfree(comment); | |
855 | ||
856 | printf("failed to read v2 public key from %s.\n", identity_file); | |
857 | exit(1); | |
858 | } | |
70791e56 | 859 | |
3c0ef626 | 860 | /* |
861 | * Change the comment of a private key file. | |
862 | */ | |
863 | static void | |
864 | do_change_comment(struct passwd *pw) | |
865 | { | |
866 | char new_comment[1024], *comment, *passphrase; | |
867 | Key *private; | |
868 | Key *public; | |
869 | struct stat st; | |
870 | FILE *f; | |
871 | int fd; | |
872 | ||
873 | if (!have_identity) | |
874 | ask_filename(pw, "Enter file in which the key is"); | |
875 | if (stat(identity_file, &st) < 0) { | |
876 | perror(identity_file); | |
877 | exit(1); | |
878 | } | |
879 | private = key_load_private(identity_file, "", &comment); | |
880 | if (private == NULL) { | |
881 | if (identity_passphrase) | |
882 | passphrase = xstrdup(identity_passphrase); | |
883 | else if (identity_new_passphrase) | |
884 | passphrase = xstrdup(identity_new_passphrase); | |
885 | else | |
886 | passphrase = read_passphrase("Enter passphrase: ", | |
887 | RP_ALLOW_STDIN); | |
888 | /* Try to load using the passphrase. */ | |
889 | private = key_load_private(identity_file, passphrase, &comment); | |
890 | if (private == NULL) { | |
891 | memset(passphrase, 0, strlen(passphrase)); | |
892 | xfree(passphrase); | |
893 | printf("Bad passphrase.\n"); | |
894 | exit(1); | |
895 | } | |
896 | } else { | |
897 | passphrase = xstrdup(""); | |
898 | } | |
899 | if (private->type != KEY_RSA1) { | |
900 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
901 | key_free(private); | |
902 | exit(1); | |
e9a17296 | 903 | } |
3c0ef626 | 904 | printf("Key now has comment '%s'\n", comment); |
905 | ||
906 | if (identity_comment) { | |
907 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
908 | } else { | |
909 | printf("Enter new comment: "); | |
910 | fflush(stdout); | |
911 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
912 | memset(passphrase, 0, strlen(passphrase)); | |
913 | key_free(private); | |
914 | exit(1); | |
915 | } | |
916 | if (strchr(new_comment, '\n')) | |
917 | *strchr(new_comment, '\n') = 0; | |
918 | } | |
919 | ||
920 | /* Save the file using the new passphrase. */ | |
921 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { | |
922 | printf("Saving the key failed: %s.\n", identity_file); | |
923 | memset(passphrase, 0, strlen(passphrase)); | |
924 | xfree(passphrase); | |
925 | key_free(private); | |
926 | xfree(comment); | |
927 | exit(1); | |
928 | } | |
929 | memset(passphrase, 0, strlen(passphrase)); | |
930 | xfree(passphrase); | |
931 | public = key_from_private(private); | |
932 | key_free(private); | |
933 | ||
934 | strlcat(identity_file, ".pub", sizeof(identity_file)); | |
935 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); | |
936 | if (fd == -1) { | |
937 | printf("Could not save your public key in %s\n", identity_file); | |
938 | exit(1); | |
939 | } | |
940 | f = fdopen(fd, "w"); | |
941 | if (f == NULL) { | |
942 | printf("fdopen %s failed", identity_file); | |
943 | exit(1); | |
944 | } | |
945 | if (!key_write(public, f)) | |
946 | fprintf(stderr, "write key failed"); | |
947 | key_free(public); | |
948 | fprintf(f, " %s\n", new_comment); | |
949 | fclose(f); | |
950 | ||
951 | xfree(comment); | |
952 | ||
953 | printf("The comment in your key file has been changed.\n"); | |
954 | exit(0); | |
955 | } | |
956 | ||
957 | static void | |
958 | usage(void) | |
959 | { | |
960 | fprintf(stderr, "Usage: %s [options]\n", __progname); | |
961 | fprintf(stderr, "Options:\n"); | |
34fee935 | 962 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
963 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
3c0ef626 | 964 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
34fee935 | 965 | fprintf(stderr, " -C comment Provide new comment.\n"); |
3c0ef626 | 966 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
34fee935 | 967 | #ifdef SMARTCARD |
968 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
969 | #endif /* SMARTCARD */ | |
3c0ef626 | 970 | fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n"); |
34fee935 | 971 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
3c0ef626 | 972 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
34fee935 | 973 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
70791e56 | 974 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
34fee935 | 975 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
3c0ef626 | 976 | fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n"); |
977 | fprintf(stderr, " -l Show fingerprint of key file.\n"); | |
34fee935 | 978 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
3c0ef626 | 979 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
980 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
34fee935 | 981 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
982 | fprintf(stderr, " -q Quiet.\n"); | |
983 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
70791e56 | 984 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
34fee935 | 985 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
986 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
987 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
3c0ef626 | 988 | #ifdef SMARTCARD |
3c0ef626 | 989 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
990 | #endif /* SMARTCARD */ | |
34fee935 | 991 | fprintf(stderr, " -v Verbose.\n"); |
992 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
993 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
70791e56 | 994 | |
3c0ef626 | 995 | exit(1); |
996 | } | |
997 | ||
998 | /* | |
999 | * Main program for key management. | |
1000 | */ | |
1001 | int | |
1002 | main(int ac, char **av) | |
1003 | { | |
e9a17296 | 1004 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
70791e56 | 1005 | char out_file[MAXPATHLEN], *reader_id = NULL; |
34fee935 | 1006 | char *rr_hostname = NULL; |
3c0ef626 | 1007 | Key *private, *public; |
1008 | struct passwd *pw; | |
1009 | struct stat st; | |
34fee935 | 1010 | int opt, type, fd, download = 0; |
1011 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; | |
70791e56 | 1012 | int do_gen_candidates = 0, do_screen_candidates = 0; |
416fd2a8 | 1013 | int log_level = SYSLOG_LEVEL_INFO; |
70791e56 | 1014 | BIGNUM *start = NULL; |
3c0ef626 | 1015 | FILE *f; |
34fee935 | 1016 | const char *errstr; |
3c0ef626 | 1017 | |
1018 | extern int optind; | |
1019 | extern char *optarg; | |
1020 | ||
70791e56 | 1021 | __progname = ssh_get_progname(av[0]); |
1b2ae391 | 1022 | init_pathnames(); |
3c0ef626 | 1023 | |
1024 | SSLeay_add_all_algorithms(); | |
70791e56 | 1025 | log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
1026 | ||
e54b3d7c | 1027 | init_rng(); |
1028 | seed_rng(); | |
3c0ef626 | 1029 | |
1030 | /* we need this for the home * directory. */ | |
1031 | pw = getpwuid(getuid()); | |
1032 | if (!pw) { | |
1033 | printf("You don't exist, go away!\n"); | |
1034 | exit(1); | |
1035 | } | |
1036 | if (gethostname(hostname, sizeof(hostname)) < 0) { | |
1037 | perror("gethostname"); | |
1038 | exit(1); | |
1039 | } | |
1040 | ||
70791e56 | 1041 | while ((opt = getopt(ac, av, |
34fee935 | 1042 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
3c0ef626 | 1043 | switch (opt) { |
1044 | case 'b': | |
34fee935 | 1045 | bits = strtonum(optarg, 512, 32768, &errstr); |
1046 | if (errstr) | |
1047 | fatal("Bits has bad value %s (%s)", | |
1048 | optarg, errstr); | |
1049 | break; | |
1050 | case 'F': | |
1051 | find_host = 1; | |
1052 | rr_hostname = optarg; | |
1053 | break; | |
1054 | case 'H': | |
1055 | hash_hosts = 1; | |
1056 | break; | |
1057 | case 'R': | |
1058 | delete_host = 1; | |
1059 | rr_hostname = optarg; | |
3c0ef626 | 1060 | break; |
1061 | case 'l': | |
1062 | print_fingerprint = 1; | |
1063 | break; | |
1064 | case 'B': | |
1065 | print_bubblebabble = 1; | |
1066 | break; | |
1067 | case 'p': | |
1068 | change_passphrase = 1; | |
1069 | break; | |
1070 | case 'c': | |
1071 | change_comment = 1; | |
1072 | break; | |
1073 | case 'f': | |
34fee935 | 1074 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1075 | sizeof(identity_file)) | |
1076 | fatal("Identity filename too long"); | |
3c0ef626 | 1077 | have_identity = 1; |
1078 | break; | |
70791e56 | 1079 | case 'g': |
1080 | print_generic = 1; | |
1081 | break; | |
3c0ef626 | 1082 | case 'P': |
1083 | identity_passphrase = optarg; | |
1084 | break; | |
1085 | case 'N': | |
1086 | identity_new_passphrase = optarg; | |
1087 | break; | |
1088 | case 'C': | |
1089 | identity_comment = optarg; | |
1090 | break; | |
1091 | case 'q': | |
1092 | quiet = 1; | |
1093 | break; | |
3c0ef626 | 1094 | case 'e': |
1095 | case 'x': | |
1096 | /* export key */ | |
1097 | convert_to_ssh2 = 1; | |
1098 | break; | |
1099 | case 'i': | |
1100 | case 'X': | |
1101 | /* import key */ | |
1102 | convert_from_ssh2 = 1; | |
1103 | break; | |
1104 | case 'y': | |
1105 | print_public = 1; | |
1106 | break; | |
1107 | case 'd': | |
1108 | key_type_name = "dsa"; | |
1109 | break; | |
1110 | case 't': | |
1111 | key_type_name = optarg; | |
1112 | break; | |
1113 | case 'D': | |
1114 | download = 1; | |
1115 | case 'U': | |
1116 | reader_id = optarg; | |
1117 | break; | |
416fd2a8 | 1118 | case 'v': |
1119 | if (log_level == SYSLOG_LEVEL_INFO) | |
1120 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1121 | else { | |
1b56ff3d | 1122 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
416fd2a8 | 1123 | log_level < SYSLOG_LEVEL_DEBUG3) |
1124 | log_level++; | |
1125 | } | |
1126 | break; | |
70791e56 | 1127 | case 'r': |
34fee935 | 1128 | rr_hostname = optarg; |
70791e56 | 1129 | break; |
1130 | case 'W': | |
34fee935 | 1131 | generator_wanted = strtonum(optarg, 1, UINT_MAX, &errstr); |
1132 | if (errstr) | |
1133 | fatal("Desired generator has bad value: %s (%s)", | |
1134 | optarg, errstr); | |
70791e56 | 1135 | break; |
1136 | case 'a': | |
34fee935 | 1137 | trials = strtonum(optarg, 1, UINT_MAX, &errstr); |
1138 | if (errstr) | |
1139 | fatal("Invalid number of trials: %s (%s)", | |
1140 | optarg, errstr); | |
70791e56 | 1141 | break; |
1142 | case 'M': | |
34fee935 | 1143 | memory = strtonum(optarg, 1, UINT_MAX, &errstr); |
1144 | if (errstr) { | |
1145 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1146 | } | |
70791e56 | 1147 | break; |
1148 | case 'G': | |
1149 | do_gen_candidates = 1; | |
34fee935 | 1150 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1151 | sizeof(out_file)) | |
1152 | fatal("Output filename too long"); | |
70791e56 | 1153 | break; |
1154 | case 'T': | |
1155 | do_screen_candidates = 1; | |
34fee935 | 1156 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1157 | sizeof(out_file)) | |
1158 | fatal("Output filename too long"); | |
70791e56 | 1159 | break; |
1160 | case 'S': | |
1161 | /* XXX - also compare length against bits */ | |
1162 | if (BN_hex2bn(&start, optarg) == 0) | |
1163 | fatal("Invalid start point."); | |
1164 | break; | |
3c0ef626 | 1165 | case '?': |
1166 | default: | |
1167 | usage(); | |
1168 | } | |
1169 | } | |
416fd2a8 | 1170 | |
1171 | /* reinit */ | |
1172 | log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1); | |
1173 | ||
3c0ef626 | 1174 | if (optind < ac) { |
1175 | printf("Too many arguments.\n"); | |
1176 | usage(); | |
1177 | } | |
1178 | if (change_passphrase && change_comment) { | |
1179 | printf("Can only have one of -p and -c.\n"); | |
1180 | usage(); | |
1181 | } | |
34fee935 | 1182 | if (delete_host || hash_hosts || find_host) |
1183 | do_known_hosts(pw, rr_hostname); | |
3c0ef626 | 1184 | if (print_fingerprint || print_bubblebabble) |
1185 | do_fingerprint(pw); | |
1186 | if (change_passphrase) | |
1187 | do_change_passphrase(pw); | |
2980ea68 | 1188 | if (change_comment) |
1189 | do_change_comment(pw); | |
e54b3d7c | 1190 | if (convert_to_ssh2) |
1191 | do_convert_to_ssh2(pw); | |
1192 | if (convert_from_ssh2) | |
1193 | do_convert_from_ssh2(pw); | |
3c0ef626 | 1194 | if (print_public) |
1195 | do_print_public(pw); | |
34fee935 | 1196 | if (rr_hostname != NULL) { |
1197 | do_print_resource_record(pw, rr_hostname); | |
70791e56 | 1198 | } |
3c0ef626 | 1199 | if (reader_id != NULL) { |
1200 | #ifdef SMARTCARD | |
1201 | if (download) | |
1202 | do_download(pw, reader_id); | |
1203 | else | |
1204 | do_upload(pw, reader_id); | |
1205 | #else /* SMARTCARD */ | |
1206 | fatal("no support for smartcards."); | |
1207 | #endif /* SMARTCARD */ | |
1208 | } | |
1209 | ||
70791e56 | 1210 | if (do_gen_candidates) { |
1211 | FILE *out = fopen(out_file, "w"); | |
416fd2a8 | 1212 | |
70791e56 | 1213 | if (out == NULL) { |
1214 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1215 | out_file, strerror(errno)); | |
1216 | return (1); | |
1217 | } | |
1218 | if (gen_candidates(out, memory, bits, start) != 0) | |
1219 | fatal("modulus candidate generation failed\n"); | |
1220 | ||
1221 | return (0); | |
1222 | } | |
1223 | ||
1224 | if (do_screen_candidates) { | |
1225 | FILE *in; | |
1226 | FILE *out = fopen(out_file, "w"); | |
1227 | ||
1228 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1229 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1230 | fatal("Couldn't open modulus candidate " | |
416fd2a8 | 1231 | "file \"%s\": %s", identity_file, |
70791e56 | 1232 | strerror(errno)); |
1233 | } | |
1234 | } else | |
1235 | in = stdin; | |
1236 | ||
1237 | if (out == NULL) { | |
1238 | fatal("Couldn't open moduli file \"%s\": %s", | |
1239 | out_file, strerror(errno)); | |
1240 | } | |
1241 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
1242 | fatal("modulus screening failed\n"); | |
1243 | return (0); | |
1244 | } | |
1245 | ||
3c0ef626 | 1246 | arc4random_stir(); |
1247 | ||
e9a17296 | 1248 | if (key_type_name == NULL) { |
1249 | printf("You must specify a key type (-t).\n"); | |
1250 | usage(); | |
1251 | } | |
3c0ef626 | 1252 | type = key_type_from_name(key_type_name); |
1253 | if (type == KEY_UNSPEC) { | |
1254 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1255 | exit(1); | |
1256 | } | |
1257 | if (!quiet) | |
1258 | printf("Generating public/private %s key pair.\n", key_type_name); | |
1259 | private = key_generate(type, bits); | |
1260 | if (private == NULL) { | |
1261 | fprintf(stderr, "key_generate failed"); | |
1262 | exit(1); | |
1263 | } | |
1264 | public = key_from_private(private); | |
1265 | ||
1266 | if (!have_identity) | |
1267 | ask_filename(pw, "Enter file in which to save the key"); | |
1268 | ||
1269 | /* Create ~/.ssh directory if it doesn\'t already exist. */ | |
1270 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); | |
1271 | if (strstr(identity_file, dotsshdir) != NULL && | |
1272 | stat(dotsshdir, &st) < 0) { | |
1273 | if (mkdir(dotsshdir, 0700) < 0) | |
1274 | error("Could not create directory '%s'.", dotsshdir); | |
1275 | else if (!quiet) | |
1276 | printf("Created directory '%s'.\n", dotsshdir); | |
1277 | } | |
1278 | /* If the file already exists, ask the user to confirm. */ | |
1279 | if (stat(identity_file, &st) >= 0) { | |
1280 | char yesno[3]; | |
1281 | printf("%s already exists.\n", identity_file); | |
1282 | printf("Overwrite (y/n)? "); | |
1283 | fflush(stdout); | |
1284 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1285 | exit(1); | |
1286 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1287 | exit(1); | |
1288 | } | |
1289 | /* Ask for a passphrase (twice). */ | |
1290 | if (identity_passphrase) | |
1291 | passphrase1 = xstrdup(identity_passphrase); | |
1292 | else if (identity_new_passphrase) | |
1293 | passphrase1 = xstrdup(identity_new_passphrase); | |
1294 | else { | |
1295 | passphrase_again: | |
1296 | passphrase1 = | |
1297 | read_passphrase("Enter passphrase (empty for no " | |
1298 | "passphrase): ", RP_ALLOW_STDIN); | |
1299 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1300 | RP_ALLOW_STDIN); | |
1301 | if (strcmp(passphrase1, passphrase2) != 0) { | |
1302 | /* | |
1303 | * The passphrases do not match. Clear them and | |
1304 | * retry. | |
1305 | */ | |
1306 | memset(passphrase1, 0, strlen(passphrase1)); | |
1307 | memset(passphrase2, 0, strlen(passphrase2)); | |
1308 | xfree(passphrase1); | |
1309 | xfree(passphrase2); | |
1310 | printf("Passphrases do not match. Try again.\n"); | |
1311 | goto passphrase_again; | |
1312 | } | |
1313 | /* Clear the other copy of the passphrase. */ | |
1314 | memset(passphrase2, 0, strlen(passphrase2)); | |
1315 | xfree(passphrase2); | |
1316 | } | |
1317 | ||
1318 | if (identity_comment) { | |
1319 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1320 | } else { | |
1321 | /* Create default commend field for the passphrase. */ | |
1322 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); | |
1323 | } | |
1324 | ||
1325 | /* Save the key with the given passphrase and comment. */ | |
1326 | if (!key_save_private(private, identity_file, passphrase1, comment)) { | |
1327 | printf("Saving the key failed: %s.\n", identity_file); | |
1328 | memset(passphrase1, 0, strlen(passphrase1)); | |
1329 | xfree(passphrase1); | |
1330 | exit(1); | |
1331 | } | |
1332 | /* Clear the passphrase. */ | |
1333 | memset(passphrase1, 0, strlen(passphrase1)); | |
1334 | xfree(passphrase1); | |
1335 | ||
1336 | /* Clear the private key and the random number generator. */ | |
1337 | key_free(private); | |
1338 | arc4random_stir(); | |
1339 | ||
1340 | if (!quiet) | |
1341 | printf("Your identification has been saved in %s.\n", identity_file); | |
1342 | ||
1343 | strlcat(identity_file, ".pub", sizeof(identity_file)); | |
1344 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); | |
1345 | if (fd == -1) { | |
1346 | printf("Could not save your public key in %s\n", identity_file); | |
1347 | exit(1); | |
1348 | } | |
1349 | f = fdopen(fd, "w"); | |
1350 | if (f == NULL) { | |
1351 | printf("fdopen %s failed", identity_file); | |
1352 | exit(1); | |
1353 | } | |
1354 | if (!key_write(public, f)) | |
1355 | fprintf(stderr, "write key failed"); | |
1356 | fprintf(f, " %s\n", comment); | |
1357 | fclose(f); | |
1358 | ||
1359 | if (!quiet) { | |
1360 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); | |
1361 | printf("Your public key has been saved in %s.\n", | |
1362 | identity_file); | |
1363 | printf("The key fingerprint is:\n"); | |
1364 | printf("%s %s\n", fp, comment); | |
1365 | xfree(fp); | |
1366 | } | |
1367 | ||
1368 | key_free(public); | |
1369 | exit(0); | |
1370 | } |