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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
3 | * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5260325f | 5 | * Identity and host key generation and maintenance. |
bcbf86ec | 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". | |
5260325f | 12 | */ |
8efc0c15 | 13 | |
14 | #include "includes.h" | |
c523303b | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.35 2000/11/25 17:19:33 markus Exp $"); |
8efc0c15 | 16 | |
a306f2dd | 17 | #include <openssl/evp.h> |
18 | #include <openssl/pem.h> | |
19 | #include <openssl/rsa.h> | |
20 | #include <openssl/dsa.h> | |
21 | ||
8efc0c15 | 22 | #include "ssh.h" |
23 | #include "xmalloc.h" | |
a306f2dd | 24 | #include "key.h" |
25 | #include "rsa.h" | |
a306f2dd | 26 | #include "authfile.h" |
27 | #include "uuencode.h" | |
8efc0c15 | 28 | |
94ec8c6b | 29 | #include "buffer.h" |
30 | #include "bufaux.h" | |
31 | ||
a306f2dd | 32 | /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
8efc0c15 | 33 | int bits = 1024; |
34 | ||
aa3378df | 35 | /* |
36 | * Flag indicating that we just want to change the passphrase. This can be | |
37 | * set on the command line. | |
38 | */ | |
8efc0c15 | 39 | int change_passphrase = 0; |
40 | ||
aa3378df | 41 | /* |
42 | * Flag indicating that we just want to change the comment. This can be set | |
43 | * on the command line. | |
44 | */ | |
8efc0c15 | 45 | int change_comment = 0; |
46 | ||
47 | int quiet = 0; | |
48 | ||
f095fcc7 | 49 | /* Flag indicating that we just want to see the key fingerprint */ |
50 | int print_fingerprint = 0; | |
51 | ||
5ad13cd7 | 52 | /* The identity file name, given on the command line or entered by the user. */ |
53 | char identity_file[1024]; | |
54 | int have_identity = 0; | |
8efc0c15 | 55 | |
56 | /* This is set to the passphrase if given on the command line. */ | |
57 | char *identity_passphrase = NULL; | |
58 | ||
59 | /* This is set to the new passphrase if given on the command line. */ | |
60 | char *identity_new_passphrase = NULL; | |
61 | ||
62 | /* This is set to the new comment if given on the command line. */ | |
63 | char *identity_comment = NULL; | |
64 | ||
a306f2dd | 65 | /* Dump public key file in format used by real and the original SSH 2 */ |
66 | int convert_to_ssh2 = 0; | |
67 | int convert_from_ssh2 = 0; | |
68 | int print_public = 0; | |
fa08c86b | 69 | |
c523303b | 70 | /* default to RSA for SSH-1 */ |
71 | char *key_type_name = "rsa1"; | |
a306f2dd | 72 | |
5ad13cd7 | 73 | /* argv0 */ |
5260325f | 74 | #ifdef HAVE___PROGNAME |
5ad13cd7 | 75 | extern char *__progname; |
260d427b | 76 | #else |
77 | char *__progname; | |
78 | #endif | |
8efc0c15 | 79 | |
a306f2dd | 80 | char hostname[MAXHOSTNAMELEN]; |
81 | ||
5ad13cd7 | 82 | void |
83 | ask_filename(struct passwd *pw, const char *prompt) | |
8efc0c15 | 84 | { |
5260325f | 85 | char buf[1024]; |
c523303b | 86 | char *name = NULL; |
87 | ||
88 | switch (key_type_from_name(key_type_name)) { | |
89 | case KEY_RSA1: | |
90 | name = SSH_CLIENT_IDENTITY; | |
91 | break; | |
92 | case KEY_DSA: | |
93 | name = SSH_CLIENT_ID_DSA; | |
94 | break; | |
95 | case KEY_RSA: | |
96 | name = SSH_CLIENT_ID_RSA; | |
97 | break; | |
98 | default: | |
99 | fprintf(stderr, "bad key type"); | |
100 | exit(1); | |
101 | break; | |
102 | } | |
103 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); | |
5260325f | 104 | printf("%s (%s): ", prompt, identity_file); |
105 | fflush(stdout); | |
106 | if (fgets(buf, sizeof(buf), stdin) == NULL) | |
107 | exit(1); | |
108 | if (strchr(buf, '\n')) | |
109 | *strchr(buf, '\n') = 0; | |
110 | if (strcmp(buf, "") != 0) | |
111 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
112 | have_identity = 1; | |
f095fcc7 | 113 | } |
8efc0c15 | 114 | |
a306f2dd | 115 | int |
116 | try_load_key(char *filename, Key *k) | |
117 | { | |
118 | int success = 1; | |
119 | if (!load_private_key(filename, "", k, NULL)) { | |
120 | char *pass = read_passphrase("Enter passphrase: ", 1); | |
121 | if (!load_private_key(filename, pass, k, NULL)) { | |
122 | success = 0; | |
123 | } | |
124 | memset(pass, 0, strlen(pass)); | |
125 | xfree(pass); | |
126 | } | |
127 | return success; | |
128 | } | |
129 | ||
94ec8c6b | 130 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
131 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" | |
132 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" | |
133 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb | |
a306f2dd | 134 | |
135 | void | |
136 | do_convert_to_ssh2(struct passwd *pw) | |
137 | { | |
138 | Key *k; | |
139 | int len; | |
140 | unsigned char *blob; | |
141 | struct stat st; | |
142 | ||
143 | if (!have_identity) | |
144 | ask_filename(pw, "Enter file in which the key is"); | |
145 | if (stat(identity_file, &st) < 0) { | |
146 | perror(identity_file); | |
147 | exit(1); | |
148 | } | |
fa08c86b | 149 | k = key_new(KEY_UNSPEC); |
a306f2dd | 150 | if (!try_load_key(identity_file, k)) { |
151 | fprintf(stderr, "load failed\n"); | |
152 | exit(1); | |
153 | } | |
fa08c86b | 154 | key_to_blob(k, &blob, &len); |
94ec8c6b | 155 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 156 | fprintf(stdout, |
94ec8c6b | 157 | "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
158 | key_size(k), key_type(k), | |
a306f2dd | 159 | pw->pw_name, hostname); |
160 | dump_base64(stdout, blob, len); | |
94ec8c6b | 161 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
a306f2dd | 162 | key_free(k); |
163 | xfree(blob); | |
164 | exit(0); | |
165 | } | |
166 | ||
94ec8c6b | 167 | void |
168 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) | |
169 | { | |
170 | int bits = buffer_get_int(b); | |
171 | int bytes = (bits + 7) / 8; | |
172 | if (buffer_len(b) < bytes) | |
173 | fatal("buffer_get_bignum_bits: input buffer too small"); | |
174 | BN_bin2bn((unsigned char *)buffer_ptr(b), bytes, value); | |
175 | buffer_consume(b, bytes); | |
176 | } | |
177 | ||
178 | Key * | |
179 | do_convert_private_ssh2_from_blob(char *blob, int blen) | |
180 | { | |
181 | Buffer b; | |
182 | DSA *dsa; | |
183 | Key *key = NULL; | |
184 | int ignore, magic, rlen; | |
185 | char *type, *cipher; | |
186 | ||
187 | buffer_init(&b); | |
188 | buffer_append(&b, blob, blen); | |
189 | ||
190 | magic = buffer_get_int(&b); | |
191 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
192 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
193 | buffer_free(&b); | |
194 | return NULL; | |
195 | } | |
196 | ignore = buffer_get_int(&b); | |
197 | type = buffer_get_string(&b, NULL); | |
198 | cipher = buffer_get_string(&b, NULL); | |
199 | ignore = buffer_get_int(&b); | |
200 | ignore = buffer_get_int(&b); | |
201 | ignore = buffer_get_int(&b); | |
202 | xfree(type); | |
203 | ||
204 | if (strcmp(cipher, "none") != 0) { | |
205 | error("unsupported cipher %s", cipher); | |
206 | xfree(cipher); | |
207 | buffer_free(&b); | |
208 | return NULL; | |
209 | } | |
210 | xfree(cipher); | |
211 | ||
212 | key = key_new(KEY_DSA); | |
213 | dsa = key->dsa; | |
214 | dsa->priv_key = BN_new(); | |
215 | if (dsa->priv_key == NULL) { | |
216 | error("alloc priv_key failed"); | |
217 | key_free(key); | |
218 | return NULL; | |
219 | } | |
220 | buffer_get_bignum_bits(&b, dsa->p); | |
221 | buffer_get_bignum_bits(&b, dsa->g); | |
222 | buffer_get_bignum_bits(&b, dsa->q); | |
223 | buffer_get_bignum_bits(&b, dsa->pub_key); | |
224 | buffer_get_bignum_bits(&b, dsa->priv_key); | |
225 | rlen = buffer_len(&b); | |
226 | if(rlen != 0) | |
227 | error("do_convert_private_ssh2_from_blob: remaining bytes in key blob %d", rlen); | |
228 | buffer_free(&b); | |
229 | return key; | |
230 | } | |
231 | ||
a306f2dd | 232 | void |
233 | do_convert_from_ssh2(struct passwd *pw) | |
234 | { | |
235 | Key *k; | |
236 | int blen; | |
237 | char line[1024], *p; | |
238 | char blob[8096]; | |
239 | char encoded[8096]; | |
240 | struct stat st; | |
94ec8c6b | 241 | int escaped = 0, private = 0, ok; |
a306f2dd | 242 | FILE *fp; |
243 | ||
244 | if (!have_identity) | |
245 | ask_filename(pw, "Enter file in which the key is"); | |
246 | if (stat(identity_file, &st) < 0) { | |
247 | perror(identity_file); | |
248 | exit(1); | |
249 | } | |
250 | fp = fopen(identity_file, "r"); | |
251 | if (fp == NULL) { | |
252 | perror(identity_file); | |
253 | exit(1); | |
254 | } | |
255 | encoded[0] = '\0'; | |
256 | while (fgets(line, sizeof(line), fp)) { | |
d0c832f3 | 257 | if (!(p = strchr(line, '\n'))) { |
258 | fprintf(stderr, "input line too long.\n"); | |
259 | exit(1); | |
260 | } | |
261 | if (p > line && p[-1] == '\\') | |
262 | escaped++; | |
a306f2dd | 263 | if (strncmp(line, "----", 4) == 0 || |
264 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 265 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
266 | private = 1; | |
a306f2dd | 267 | fprintf(stderr, "ignore: %s", line); |
268 | continue; | |
269 | } | |
d0c832f3 | 270 | if (escaped) { |
271 | escaped--; | |
272 | fprintf(stderr, "escaped: %s", line); | |
273 | continue; | |
a306f2dd | 274 | } |
275 | *p = '\0'; | |
276 | strlcat(encoded, line, sizeof(encoded)); | |
277 | } | |
278 | blen = uudecode(encoded, (unsigned char *)blob, sizeof(blob)); | |
279 | if (blen < 0) { | |
280 | fprintf(stderr, "uudecode failed.\n"); | |
281 | exit(1); | |
282 | } | |
94ec8c6b | 283 | k = private ? |
284 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 285 | key_from_blob(blob, blen); |
94ec8c6b | 286 | if (k == NULL) { |
287 | fprintf(stderr, "decode blob failed.\n"); | |
288 | exit(1); | |
289 | } | |
290 | ok = private ? | |
291 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
292 | key_write(k, stdout); | |
293 | if (!ok) { | |
294 | fprintf(stderr, "key write failed"); | |
295 | exit(1); | |
296 | } | |
a306f2dd | 297 | key_free(k); |
298 | fprintf(stdout, "\n"); | |
299 | fclose(fp); | |
300 | exit(0); | |
301 | } | |
302 | ||
303 | void | |
304 | do_print_public(struct passwd *pw) | |
305 | { | |
306 | Key *k; | |
a306f2dd | 307 | struct stat st; |
308 | ||
309 | if (!have_identity) | |
310 | ask_filename(pw, "Enter file in which the key is"); | |
311 | if (stat(identity_file, &st) < 0) { | |
312 | perror(identity_file); | |
313 | exit(1); | |
314 | } | |
fa08c86b | 315 | k = key_new(KEY_UNSPEC); |
a306f2dd | 316 | if (!try_load_key(identity_file, k)) { |
317 | fprintf(stderr, "load failed\n"); | |
318 | exit(1); | |
319 | } | |
a306f2dd | 320 | if (!key_write(k, stdout)) |
321 | fprintf(stderr, "key_write failed"); | |
322 | key_free(k); | |
a306f2dd | 323 | fprintf(stdout, "\n"); |
324 | exit(0); | |
325 | } | |
326 | ||
f095fcc7 | 327 | void |
328 | do_fingerprint(struct passwd *pw) | |
329 | { | |
2e73a022 | 330 | |
c8d54615 | 331 | FILE *f; |
a306f2dd | 332 | Key *public; |
c8d54615 | 333 | char *comment = NULL, *cp, *ep, line[16*1024]; |
fa08c86b | 334 | int i, skip = 0, num = 1, invalid = 1, success = 0; |
610cd5c6 | 335 | unsigned int ignore; |
5260325f | 336 | struct stat st; |
337 | ||
338 | if (!have_identity) | |
339 | ask_filename(pw, "Enter file in which the key is"); | |
340 | if (stat(identity_file, &st) < 0) { | |
341 | perror(identity_file); | |
342 | exit(1); | |
343 | } | |
fa08c86b | 344 | public = key_new(KEY_RSA1); |
a306f2dd | 345 | if (load_public_key(identity_file, public, &comment)) { |
fa08c86b | 346 | success = 1; |
347 | } else { | |
348 | key_free(public); | |
349 | public = key_new(KEY_UNSPEC); | |
350 | if (try_load_public_key(identity_file, public, &comment)) | |
351 | success = 1; | |
352 | else | |
353 | error("try_load_public_key KEY_UNSPEC failed"); | |
354 | } | |
355 | if (success) { | |
356 | printf("%d %s %s\n", key_size(public), key_fingerprint(public), comment); | |
a306f2dd | 357 | key_free(public); |
fa08c86b | 358 | xfree(comment); |
c8d54615 | 359 | exit(0); |
360 | } | |
c8d54615 | 361 | |
fa08c86b | 362 | /* XXX RSA1 only */ |
363 | ||
364 | public = key_new(KEY_RSA1); | |
c8d54615 | 365 | f = fopen(identity_file, "r"); |
366 | if (f != NULL) { | |
c8d54615 | 367 | while (fgets(line, sizeof(line), f)) { |
368 | i = strlen(line) - 1; | |
369 | if (line[i] != '\n') { | |
370 | error("line %d too long: %.40s...", num, line); | |
371 | skip = 1; | |
372 | continue; | |
373 | } | |
374 | num++; | |
375 | if (skip) { | |
376 | skip = 0; | |
377 | continue; | |
378 | } | |
379 | line[i] = '\0'; | |
380 | ||
381 | /* Skip leading whitespace, empty and comment lines. */ | |
382 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
383 | ; | |
384 | if (!*cp || *cp == '\n' || *cp == '#') | |
385 | continue ; | |
386 | i = strtol(cp, &ep, 10); | |
387 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
388 | int quoted = 0; | |
389 | comment = cp; | |
390 | for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { | |
391 | if (*cp == '\\' && cp[1] == '"') | |
392 | cp++; /* Skip both */ | |
393 | else if (*cp == '"') | |
394 | quoted = !quoted; | |
395 | } | |
396 | if (!*cp) | |
397 | continue; | |
398 | *cp++ = '\0'; | |
399 | } | |
400 | ep = cp; | |
2e73a022 | 401 | if (auth_rsa_read_key(&cp, &ignore, public->rsa->e, public->rsa->n)) { |
c8d54615 | 402 | invalid = 0; |
403 | comment = *cp ? cp : comment; | |
2e73a022 | 404 | printf("%d %s %s\n", key_size(public), |
405 | key_fingerprint(public), | |
c8d54615 | 406 | comment ? comment : "no comment"); |
5260325f | 407 | } |
5260325f | 408 | } |
c8d54615 | 409 | fclose(f); |
410 | } | |
2e73a022 | 411 | key_free(public); |
c8d54615 | 412 | if (invalid) { |
413 | printf("%s is not a valid key file.\n", identity_file); | |
414 | exit(1); | |
5260325f | 415 | } |
5260325f | 416 | exit(0); |
f095fcc7 | 417 | } |
418 | ||
5260325f | 419 | /* |
420 | * Perform changing a passphrase. The argument is the passwd structure | |
421 | * for the current user. | |
422 | */ | |
f095fcc7 | 423 | void |
424 | do_change_passphrase(struct passwd *pw) | |
425 | { | |
5260325f | 426 | char *comment; |
427 | char *old_passphrase, *passphrase1, *passphrase2; | |
428 | struct stat st; | |
a306f2dd | 429 | Key *private; |
430 | Key *public; | |
fa08c86b | 431 | int type = KEY_RSA1; |
5260325f | 432 | |
433 | if (!have_identity) | |
434 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 435 | if (stat(identity_file, &st) < 0) { |
436 | perror(identity_file); | |
437 | exit(1); | |
438 | } | |
fa08c86b | 439 | public = key_new(type); |
440 | if (!load_public_key(identity_file, public, NULL)) { | |
441 | type = KEY_UNSPEC; | |
442 | } else { | |
a306f2dd | 443 | /* Clear the public key since we are just about to load the whole file. */ |
444 | key_free(public); | |
5260325f | 445 | } |
5260325f | 446 | /* Try to load the file with empty passphrase. */ |
a306f2dd | 447 | private = key_new(type); |
448 | if (!load_private_key(identity_file, "", private, &comment)) { | |
5260325f | 449 | if (identity_passphrase) |
450 | old_passphrase = xstrdup(identity_passphrase); | |
451 | else | |
452 | old_passphrase = read_passphrase("Enter old passphrase: ", 1); | |
a306f2dd | 453 | if (!load_private_key(identity_file, old_passphrase, private, &comment)) { |
5260325f | 454 | memset(old_passphrase, 0, strlen(old_passphrase)); |
455 | xfree(old_passphrase); | |
456 | printf("Bad passphrase.\n"); | |
457 | exit(1); | |
458 | } | |
5260325f | 459 | memset(old_passphrase, 0, strlen(old_passphrase)); |
460 | xfree(old_passphrase); | |
461 | } | |
462 | printf("Key has comment '%s'\n", comment); | |
463 | ||
464 | /* Ask the new passphrase (twice). */ | |
465 | if (identity_new_passphrase) { | |
466 | passphrase1 = xstrdup(identity_new_passphrase); | |
467 | passphrase2 = NULL; | |
468 | } else { | |
469 | passphrase1 = | |
470 | read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); | |
471 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
472 | ||
473 | /* Verify that they are the same. */ | |
474 | if (strcmp(passphrase1, passphrase2) != 0) { | |
475 | memset(passphrase1, 0, strlen(passphrase1)); | |
476 | memset(passphrase2, 0, strlen(passphrase2)); | |
477 | xfree(passphrase1); | |
478 | xfree(passphrase2); | |
479 | printf("Pass phrases do not match. Try again.\n"); | |
480 | exit(1); | |
481 | } | |
482 | /* Destroy the other copy. */ | |
483 | memset(passphrase2, 0, strlen(passphrase2)); | |
484 | xfree(passphrase2); | |
8efc0c15 | 485 | } |
8efc0c15 | 486 | |
5260325f | 487 | /* Save the file using the new passphrase. */ |
a306f2dd | 488 | if (!save_private_key(identity_file, passphrase1, private, comment)) { |
5260325f | 489 | printf("Saving the key failed: %s: %s.\n", |
490 | identity_file, strerror(errno)); | |
491 | memset(passphrase1, 0, strlen(passphrase1)); | |
492 | xfree(passphrase1); | |
a306f2dd | 493 | key_free(private); |
5260325f | 494 | xfree(comment); |
495 | exit(1); | |
496 | } | |
497 | /* Destroy the passphrase and the copy of the key in memory. */ | |
498 | memset(passphrase1, 0, strlen(passphrase1)); | |
499 | xfree(passphrase1); | |
a306f2dd | 500 | key_free(private); /* Destroys contents */ |
5260325f | 501 | xfree(comment); |
502 | ||
503 | printf("Your identification has been saved with the new passphrase.\n"); | |
504 | exit(0); | |
505 | } | |
8efc0c15 | 506 | |
5260325f | 507 | /* |
508 | * Change the comment of a private key file. | |
509 | */ | |
8efc0c15 | 510 | void |
511 | do_change_comment(struct passwd *pw) | |
512 | { | |
5260325f | 513 | char new_comment[1024], *comment; |
a306f2dd | 514 | Key *private; |
515 | Key *public; | |
5260325f | 516 | char *passphrase; |
517 | struct stat st; | |
518 | FILE *f; | |
5260325f | 519 | |
520 | if (!have_identity) | |
521 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 522 | if (stat(identity_file, &st) < 0) { |
523 | perror(identity_file); | |
524 | exit(1); | |
525 | } | |
aa3378df | 526 | /* |
527 | * Try to load the public key from the file the verify that it is | |
528 | * readable and of the proper format. | |
529 | */ | |
fa08c86b | 530 | public = key_new(KEY_RSA1); |
a306f2dd | 531 | if (!load_public_key(identity_file, public, NULL)) { |
5260325f | 532 | printf("%s is not a valid key file.\n", identity_file); |
533 | exit(1); | |
8efc0c15 | 534 | } |
aa3378df | 535 | |
fa08c86b | 536 | private = key_new(KEY_RSA1); |
a306f2dd | 537 | if (load_private_key(identity_file, "", private, &comment)) |
5260325f | 538 | passphrase = xstrdup(""); |
539 | else { | |
5260325f | 540 | if (identity_passphrase) |
541 | passphrase = xstrdup(identity_passphrase); | |
542 | else if (identity_new_passphrase) | |
543 | passphrase = xstrdup(identity_new_passphrase); | |
544 | else | |
545 | passphrase = read_passphrase("Enter passphrase: ", 1); | |
546 | /* Try to load using the passphrase. */ | |
a306f2dd | 547 | if (!load_private_key(identity_file, passphrase, private, &comment)) { |
5260325f | 548 | memset(passphrase, 0, strlen(passphrase)); |
549 | xfree(passphrase); | |
550 | printf("Bad passphrase.\n"); | |
551 | exit(1); | |
552 | } | |
553 | } | |
554 | printf("Key now has comment '%s'\n", comment); | |
555 | ||
556 | if (identity_comment) { | |
557 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
558 | } else { | |
559 | printf("Enter new comment: "); | |
560 | fflush(stdout); | |
561 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
562 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 563 | key_free(private); |
5260325f | 564 | exit(1); |
565 | } | |
5260325f | 566 | if (strchr(new_comment, '\n')) |
567 | *strchr(new_comment, '\n') = 0; | |
568 | } | |
569 | ||
570 | /* Save the file using the new passphrase. */ | |
a306f2dd | 571 | if (!save_private_key(identity_file, passphrase, private, new_comment)) { |
5260325f | 572 | printf("Saving the key failed: %s: %s.\n", |
573 | identity_file, strerror(errno)); | |
574 | memset(passphrase, 0, strlen(passphrase)); | |
575 | xfree(passphrase); | |
a306f2dd | 576 | key_free(private); |
5260325f | 577 | xfree(comment); |
578 | exit(1); | |
8efc0c15 | 579 | } |
5260325f | 580 | memset(passphrase, 0, strlen(passphrase)); |
581 | xfree(passphrase); | |
a306f2dd | 582 | key_free(private); |
5260325f | 583 | |
5260325f | 584 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
585 | f = fopen(identity_file, "w"); | |
586 | if (!f) { | |
587 | printf("Could not save your public key in %s\n", identity_file); | |
588 | exit(1); | |
589 | } | |
a306f2dd | 590 | if (!key_write(public, f)) |
591 | fprintf(stderr, "write key failed"); | |
592 | key_free(public); | |
593 | fprintf(f, " %s\n", new_comment); | |
5260325f | 594 | fclose(f); |
595 | ||
596 | xfree(comment); | |
597 | ||
598 | printf("The comment in your key file has been changed.\n"); | |
599 | exit(0); | |
8efc0c15 | 600 | } |
601 | ||
5ad13cd7 | 602 | void |
603 | usage(void) | |
604 | { | |
fa08c86b | 605 | printf("Usage: %s [-lpqxXyc] [-t type] [-b bits] [-f file] [-C comment] [-N new-pass] [-P pass]\n", __progname); |
5260325f | 606 | exit(1); |
5ad13cd7 | 607 | } |
608 | ||
5260325f | 609 | /* |
610 | * Main program for key management. | |
611 | */ | |
8efc0c15 | 612 | int |
613 | main(int ac, char **av) | |
614 | { | |
5260325f | 615 | char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
616 | struct passwd *pw; | |
c523303b | 617 | int opt, type; |
5260325f | 618 | struct stat st; |
619 | FILE *f; | |
a306f2dd | 620 | Key *private; |
621 | Key *public; | |
fa08c86b | 622 | |
5260325f | 623 | extern int optind; |
624 | extern char *optarg; | |
625 | ||
260d427b | 626 | __progname = get_progname(av[0]); |
264dce47 | 627 | init_rng(); |
628 | ||
fa649821 | 629 | SSLeay_add_all_algorithms(); |
a306f2dd | 630 | |
aa3378df | 631 | /* we need this for the home * directory. */ |
5260325f | 632 | pw = getpwuid(getuid()); |
633 | if (!pw) { | |
634 | printf("You don't exist, go away!\n"); | |
635 | exit(1); | |
636 | } | |
a306f2dd | 637 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
638 | perror("gethostname"); | |
639 | exit(1); | |
640 | } | |
aa3378df | 641 | |
fa08c86b | 642 | while ((opt = getopt(ac, av, "dqpclRxXyb:f:t:P:N:C:")) != EOF) { |
5260325f | 643 | switch (opt) { |
644 | case 'b': | |
645 | bits = atoi(optarg); | |
646 | if (bits < 512 || bits > 32768) { | |
647 | printf("Bits has bad value.\n"); | |
648 | exit(1); | |
649 | } | |
650 | break; | |
651 | ||
652 | case 'l': | |
653 | print_fingerprint = 1; | |
654 | break; | |
655 | ||
656 | case 'p': | |
657 | change_passphrase = 1; | |
658 | break; | |
659 | ||
660 | case 'c': | |
661 | change_comment = 1; | |
662 | break; | |
663 | ||
664 | case 'f': | |
665 | strlcpy(identity_file, optarg, sizeof(identity_file)); | |
666 | have_identity = 1; | |
667 | break; | |
668 | ||
669 | case 'P': | |
670 | identity_passphrase = optarg; | |
671 | break; | |
672 | ||
673 | case 'N': | |
674 | identity_new_passphrase = optarg; | |
675 | break; | |
676 | ||
677 | case 'C': | |
678 | identity_comment = optarg; | |
679 | break; | |
680 | ||
681 | case 'q': | |
682 | quiet = 1; | |
683 | break; | |
684 | ||
a306f2dd | 685 | case 'R': |
fa08c86b | 686 | /* unused */ |
687 | exit(0); | |
a306f2dd | 688 | break; |
689 | ||
690 | case 'x': | |
691 | convert_to_ssh2 = 1; | |
692 | break; | |
693 | ||
694 | case 'X': | |
695 | convert_from_ssh2 = 1; | |
696 | break; | |
697 | ||
698 | case 'y': | |
699 | print_public = 1; | |
700 | break; | |
701 | ||
702 | case 'd': | |
fa08c86b | 703 | key_type_name = "dsa"; |
a306f2dd | 704 | break; |
705 | ||
fa08c86b | 706 | case 't': |
707 | key_type_name = optarg; | |
fa08c86b | 708 | break; |
709 | ||
5260325f | 710 | case '?': |
711 | default: | |
712 | usage(); | |
713 | } | |
714 | } | |
715 | if (optind < ac) { | |
716 | printf("Too many arguments.\n"); | |
717 | usage(); | |
718 | } | |
719 | if (change_passphrase && change_comment) { | |
720 | printf("Can only have one of -p and -c.\n"); | |
721 | usage(); | |
722 | } | |
723 | if (print_fingerprint) | |
724 | do_fingerprint(pw); | |
5260325f | 725 | if (change_passphrase) |
726 | do_change_passphrase(pw); | |
5260325f | 727 | if (change_comment) |
728 | do_change_comment(pw); | |
a306f2dd | 729 | if (convert_to_ssh2) |
730 | do_convert_to_ssh2(pw); | |
731 | if (convert_from_ssh2) | |
732 | do_convert_from_ssh2(pw); | |
733 | if (print_public) | |
734 | do_print_public(pw); | |
5260325f | 735 | |
736 | arc4random_stir(); | |
737 | ||
c523303b | 738 | type = key_type_from_name(key_type_name); |
739 | if (type == KEY_UNSPEC) { | |
740 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
741 | exit(1); | |
a306f2dd | 742 | } |
fa08c86b | 743 | if (!quiet) |
c523303b | 744 | printf("Generating public/private %s key pair.\n", key_type_name); |
fa08c86b | 745 | private = key_generate(type, bits); |
746 | if (private == NULL) { | |
747 | fprintf(stderr, "key_generate failed"); | |
748 | exit(1); | |
749 | } | |
750 | public = key_from_private(private); | |
5260325f | 751 | |
752 | if (!have_identity) | |
753 | ask_filename(pw, "Enter file in which to save the key"); | |
754 | ||
755 | /* Create ~/.ssh directory if it doesn\'t already exist. */ | |
756 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, SSH_USER_DIR); | |
757 | if (strstr(identity_file, dotsshdir) != NULL && | |
758 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 759 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 760 | error("Could not create directory '%s'.", dotsshdir); |
761 | else if (!quiet) | |
762 | printf("Created directory '%s'.\n", dotsshdir); | |
763 | } | |
764 | /* If the file already exists, ask the user to confirm. */ | |
765 | if (stat(identity_file, &st) >= 0) { | |
766 | char yesno[3]; | |
767 | printf("%s already exists.\n", identity_file); | |
768 | printf("Overwrite (y/n)? "); | |
769 | fflush(stdout); | |
770 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
771 | exit(1); | |
772 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
773 | exit(1); | |
774 | } | |
775 | /* Ask for a passphrase (twice). */ | |
776 | if (identity_passphrase) | |
777 | passphrase1 = xstrdup(identity_passphrase); | |
778 | else if (identity_new_passphrase) | |
779 | passphrase1 = xstrdup(identity_new_passphrase); | |
780 | else { | |
781 | passphrase_again: | |
782 | passphrase1 = | |
783 | read_passphrase("Enter passphrase (empty for no passphrase): ", 1); | |
784 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
785 | if (strcmp(passphrase1, passphrase2) != 0) { | |
786 | /* The passphrases do not match. Clear them and retry. */ | |
787 | memset(passphrase1, 0, strlen(passphrase1)); | |
788 | memset(passphrase2, 0, strlen(passphrase2)); | |
789 | xfree(passphrase1); | |
790 | xfree(passphrase2); | |
791 | printf("Passphrases do not match. Try again.\n"); | |
792 | goto passphrase_again; | |
793 | } | |
794 | /* Clear the other copy of the passphrase. */ | |
795 | memset(passphrase2, 0, strlen(passphrase2)); | |
796 | xfree(passphrase2); | |
797 | } | |
798 | ||
5260325f | 799 | if (identity_comment) { |
800 | strlcpy(comment, identity_comment, sizeof(comment)); | |
801 | } else { | |
6ae2364d | 802 | /* Create default commend field for the passphrase. */ |
5260325f | 803 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
804 | } | |
805 | ||
806 | /* Save the key with the given passphrase and comment. */ | |
a306f2dd | 807 | if (!save_private_key(identity_file, passphrase1, private, comment)) { |
5260325f | 808 | printf("Saving the key failed: %s: %s.\n", |
a306f2dd | 809 | identity_file, strerror(errno)); |
5260325f | 810 | memset(passphrase1, 0, strlen(passphrase1)); |
811 | xfree(passphrase1); | |
812 | exit(1); | |
813 | } | |
814 | /* Clear the passphrase. */ | |
815 | memset(passphrase1, 0, strlen(passphrase1)); | |
816 | xfree(passphrase1); | |
817 | ||
818 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 819 | key_free(private); |
5260325f | 820 | arc4random_stir(); |
821 | ||
822 | if (!quiet) | |
823 | printf("Your identification has been saved in %s.\n", identity_file); | |
824 | ||
5260325f | 825 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
826 | f = fopen(identity_file, "w"); | |
827 | if (!f) { | |
828 | printf("Could not save your public key in %s\n", identity_file); | |
829 | exit(1); | |
830 | } | |
a306f2dd | 831 | if (!key_write(public, f)) |
832 | fprintf(stderr, "write key failed"); | |
833 | fprintf(f, " %s\n", comment); | |
5260325f | 834 | fclose(f); |
835 | ||
836 | if (!quiet) { | |
a306f2dd | 837 | printf("Your public key has been saved in %s.\n", |
838 | identity_file); | |
5260325f | 839 | printf("The key fingerprint is:\n"); |
a306f2dd | 840 | printf("%s %s\n", key_fingerprint(public), comment); |
8efc0c15 | 841 | } |
a306f2dd | 842 | |
843 | key_free(public); | |
5260325f | 844 | exit(0); |
8efc0c15 | 845 | } |