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Commit | Line | Data |
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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" | |
fa08c86b | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.33 2000/11/12 19:50:38 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 | |
70 | /* key type */ | |
71 | int dsa_mode = 0; /* compat */ | |
72 | char *key_type_name = NULL; | |
a306f2dd | 73 | |
5ad13cd7 | 74 | /* argv0 */ |
5260325f | 75 | #ifdef HAVE___PROGNAME |
5ad13cd7 | 76 | extern char *__progname; |
5260325f | 77 | #else /* HAVE___PROGNAME */ |
3fd95d9a | 78 | static const char *__progname = "ssh-keygen"; |
5260325f | 79 | #endif /* HAVE___PROGNAME */ |
8efc0c15 | 80 | |
a306f2dd | 81 | char hostname[MAXHOSTNAMELEN]; |
82 | ||
5ad13cd7 | 83 | void |
84 | ask_filename(struct passwd *pw, const char *prompt) | |
8efc0c15 | 85 | { |
5260325f | 86 | char buf[1024]; |
87 | snprintf(identity_file, sizeof(identity_file), "%s/%s", | |
1d1ffb87 | 88 | pw->pw_dir, |
89 | dsa_mode ? SSH_CLIENT_ID_DSA: SSH_CLIENT_IDENTITY); | |
5260325f | 90 | printf("%s (%s): ", prompt, identity_file); |
91 | fflush(stdout); | |
92 | if (fgets(buf, sizeof(buf), stdin) == NULL) | |
93 | exit(1); | |
94 | if (strchr(buf, '\n')) | |
95 | *strchr(buf, '\n') = 0; | |
96 | if (strcmp(buf, "") != 0) | |
97 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
98 | have_identity = 1; | |
f095fcc7 | 99 | } |
8efc0c15 | 100 | |
a306f2dd | 101 | int |
102 | try_load_key(char *filename, Key *k) | |
103 | { | |
104 | int success = 1; | |
105 | if (!load_private_key(filename, "", k, NULL)) { | |
106 | char *pass = read_passphrase("Enter passphrase: ", 1); | |
107 | if (!load_private_key(filename, pass, k, NULL)) { | |
108 | success = 0; | |
109 | } | |
110 | memset(pass, 0, strlen(pass)); | |
111 | xfree(pass); | |
112 | } | |
113 | return success; | |
114 | } | |
115 | ||
94ec8c6b | 116 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
117 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" | |
118 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" | |
119 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb | |
a306f2dd | 120 | |
121 | void | |
122 | do_convert_to_ssh2(struct passwd *pw) | |
123 | { | |
124 | Key *k; | |
125 | int len; | |
126 | unsigned char *blob; | |
127 | struct stat st; | |
128 | ||
129 | if (!have_identity) | |
130 | ask_filename(pw, "Enter file in which the key is"); | |
131 | if (stat(identity_file, &st) < 0) { | |
132 | perror(identity_file); | |
133 | exit(1); | |
134 | } | |
fa08c86b | 135 | k = key_new(KEY_UNSPEC); |
a306f2dd | 136 | if (!try_load_key(identity_file, k)) { |
137 | fprintf(stderr, "load failed\n"); | |
138 | exit(1); | |
139 | } | |
fa08c86b | 140 | key_to_blob(k, &blob, &len); |
94ec8c6b | 141 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 142 | fprintf(stdout, |
94ec8c6b | 143 | "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
144 | key_size(k), key_type(k), | |
a306f2dd | 145 | pw->pw_name, hostname); |
146 | dump_base64(stdout, blob, len); | |
94ec8c6b | 147 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
a306f2dd | 148 | key_free(k); |
149 | xfree(blob); | |
150 | exit(0); | |
151 | } | |
152 | ||
94ec8c6b | 153 | void |
154 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) | |
155 | { | |
156 | int bits = buffer_get_int(b); | |
157 | int bytes = (bits + 7) / 8; | |
158 | if (buffer_len(b) < bytes) | |
159 | fatal("buffer_get_bignum_bits: input buffer too small"); | |
160 | BN_bin2bn((unsigned char *)buffer_ptr(b), bytes, value); | |
161 | buffer_consume(b, bytes); | |
162 | } | |
163 | ||
164 | Key * | |
165 | do_convert_private_ssh2_from_blob(char *blob, int blen) | |
166 | { | |
167 | Buffer b; | |
168 | DSA *dsa; | |
169 | Key *key = NULL; | |
170 | int ignore, magic, rlen; | |
171 | char *type, *cipher; | |
172 | ||
173 | buffer_init(&b); | |
174 | buffer_append(&b, blob, blen); | |
175 | ||
176 | magic = buffer_get_int(&b); | |
177 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
178 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
179 | buffer_free(&b); | |
180 | return NULL; | |
181 | } | |
182 | ignore = buffer_get_int(&b); | |
183 | type = buffer_get_string(&b, NULL); | |
184 | cipher = buffer_get_string(&b, NULL); | |
185 | ignore = buffer_get_int(&b); | |
186 | ignore = buffer_get_int(&b); | |
187 | ignore = buffer_get_int(&b); | |
188 | xfree(type); | |
189 | ||
190 | if (strcmp(cipher, "none") != 0) { | |
191 | error("unsupported cipher %s", cipher); | |
192 | xfree(cipher); | |
193 | buffer_free(&b); | |
194 | return NULL; | |
195 | } | |
196 | xfree(cipher); | |
197 | ||
198 | key = key_new(KEY_DSA); | |
199 | dsa = key->dsa; | |
200 | dsa->priv_key = BN_new(); | |
201 | if (dsa->priv_key == NULL) { | |
202 | error("alloc priv_key failed"); | |
203 | key_free(key); | |
204 | return NULL; | |
205 | } | |
206 | buffer_get_bignum_bits(&b, dsa->p); | |
207 | buffer_get_bignum_bits(&b, dsa->g); | |
208 | buffer_get_bignum_bits(&b, dsa->q); | |
209 | buffer_get_bignum_bits(&b, dsa->pub_key); | |
210 | buffer_get_bignum_bits(&b, dsa->priv_key); | |
211 | rlen = buffer_len(&b); | |
212 | if(rlen != 0) | |
213 | error("do_convert_private_ssh2_from_blob: remaining bytes in key blob %d", rlen); | |
214 | buffer_free(&b); | |
215 | return key; | |
216 | } | |
217 | ||
a306f2dd | 218 | void |
219 | do_convert_from_ssh2(struct passwd *pw) | |
220 | { | |
221 | Key *k; | |
222 | int blen; | |
223 | char line[1024], *p; | |
224 | char blob[8096]; | |
225 | char encoded[8096]; | |
226 | struct stat st; | |
94ec8c6b | 227 | int escaped = 0, private = 0, ok; |
a306f2dd | 228 | FILE *fp; |
229 | ||
230 | if (!have_identity) | |
231 | ask_filename(pw, "Enter file in which the key is"); | |
232 | if (stat(identity_file, &st) < 0) { | |
233 | perror(identity_file); | |
234 | exit(1); | |
235 | } | |
236 | fp = fopen(identity_file, "r"); | |
237 | if (fp == NULL) { | |
238 | perror(identity_file); | |
239 | exit(1); | |
240 | } | |
241 | encoded[0] = '\0'; | |
242 | while (fgets(line, sizeof(line), fp)) { | |
d0c832f3 | 243 | if (!(p = strchr(line, '\n'))) { |
244 | fprintf(stderr, "input line too long.\n"); | |
245 | exit(1); | |
246 | } | |
247 | if (p > line && p[-1] == '\\') | |
248 | escaped++; | |
a306f2dd | 249 | if (strncmp(line, "----", 4) == 0 || |
250 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 251 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
252 | private = 1; | |
a306f2dd | 253 | fprintf(stderr, "ignore: %s", line); |
254 | continue; | |
255 | } | |
d0c832f3 | 256 | if (escaped) { |
257 | escaped--; | |
258 | fprintf(stderr, "escaped: %s", line); | |
259 | continue; | |
a306f2dd | 260 | } |
261 | *p = '\0'; | |
262 | strlcat(encoded, line, sizeof(encoded)); | |
263 | } | |
264 | blen = uudecode(encoded, (unsigned char *)blob, sizeof(blob)); | |
265 | if (blen < 0) { | |
266 | fprintf(stderr, "uudecode failed.\n"); | |
267 | exit(1); | |
268 | } | |
94ec8c6b | 269 | k = private ? |
270 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 271 | key_from_blob(blob, blen); |
94ec8c6b | 272 | if (k == NULL) { |
273 | fprintf(stderr, "decode blob failed.\n"); | |
274 | exit(1); | |
275 | } | |
276 | ok = private ? | |
277 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
278 | key_write(k, stdout); | |
279 | if (!ok) { | |
280 | fprintf(stderr, "key write failed"); | |
281 | exit(1); | |
282 | } | |
a306f2dd | 283 | key_free(k); |
284 | fprintf(stdout, "\n"); | |
285 | fclose(fp); | |
286 | exit(0); | |
287 | } | |
288 | ||
289 | void | |
290 | do_print_public(struct passwd *pw) | |
291 | { | |
292 | Key *k; | |
a306f2dd | 293 | struct stat st; |
294 | ||
295 | if (!have_identity) | |
296 | ask_filename(pw, "Enter file in which the key is"); | |
297 | if (stat(identity_file, &st) < 0) { | |
298 | perror(identity_file); | |
299 | exit(1); | |
300 | } | |
fa08c86b | 301 | k = key_new(KEY_UNSPEC); |
a306f2dd | 302 | if (!try_load_key(identity_file, k)) { |
303 | fprintf(stderr, "load failed\n"); | |
304 | exit(1); | |
305 | } | |
a306f2dd | 306 | if (!key_write(k, stdout)) |
307 | fprintf(stderr, "key_write failed"); | |
308 | key_free(k); | |
a306f2dd | 309 | fprintf(stdout, "\n"); |
310 | exit(0); | |
311 | } | |
312 | ||
f095fcc7 | 313 | void |
314 | do_fingerprint(struct passwd *pw) | |
315 | { | |
2e73a022 | 316 | |
c8d54615 | 317 | FILE *f; |
a306f2dd | 318 | Key *public; |
c8d54615 | 319 | char *comment = NULL, *cp, *ep, line[16*1024]; |
fa08c86b | 320 | int i, skip = 0, num = 1, invalid = 1, success = 0; |
610cd5c6 | 321 | unsigned int ignore; |
5260325f | 322 | struct stat st; |
323 | ||
324 | if (!have_identity) | |
325 | ask_filename(pw, "Enter file in which the key is"); | |
326 | if (stat(identity_file, &st) < 0) { | |
327 | perror(identity_file); | |
328 | exit(1); | |
329 | } | |
fa08c86b | 330 | public = key_new(KEY_RSA1); |
a306f2dd | 331 | if (load_public_key(identity_file, public, &comment)) { |
fa08c86b | 332 | success = 1; |
333 | } else { | |
334 | key_free(public); | |
335 | public = key_new(KEY_UNSPEC); | |
336 | if (try_load_public_key(identity_file, public, &comment)) | |
337 | success = 1; | |
338 | else | |
339 | error("try_load_public_key KEY_UNSPEC failed"); | |
340 | } | |
341 | if (success) { | |
342 | printf("%d %s %s\n", key_size(public), key_fingerprint(public), comment); | |
a306f2dd | 343 | key_free(public); |
fa08c86b | 344 | xfree(comment); |
c8d54615 | 345 | exit(0); |
346 | } | |
c8d54615 | 347 | |
fa08c86b | 348 | /* XXX RSA1 only */ |
349 | ||
350 | public = key_new(KEY_RSA1); | |
c8d54615 | 351 | f = fopen(identity_file, "r"); |
352 | if (f != NULL) { | |
c8d54615 | 353 | while (fgets(line, sizeof(line), f)) { |
354 | i = strlen(line) - 1; | |
355 | if (line[i] != '\n') { | |
356 | error("line %d too long: %.40s...", num, line); | |
357 | skip = 1; | |
358 | continue; | |
359 | } | |
360 | num++; | |
361 | if (skip) { | |
362 | skip = 0; | |
363 | continue; | |
364 | } | |
365 | line[i] = '\0'; | |
366 | ||
367 | /* Skip leading whitespace, empty and comment lines. */ | |
368 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
369 | ; | |
370 | if (!*cp || *cp == '\n' || *cp == '#') | |
371 | continue ; | |
372 | i = strtol(cp, &ep, 10); | |
373 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
374 | int quoted = 0; | |
375 | comment = cp; | |
376 | for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { | |
377 | if (*cp == '\\' && cp[1] == '"') | |
378 | cp++; /* Skip both */ | |
379 | else if (*cp == '"') | |
380 | quoted = !quoted; | |
381 | } | |
382 | if (!*cp) | |
383 | continue; | |
384 | *cp++ = '\0'; | |
385 | } | |
386 | ep = cp; | |
2e73a022 | 387 | if (auth_rsa_read_key(&cp, &ignore, public->rsa->e, public->rsa->n)) { |
c8d54615 | 388 | invalid = 0; |
389 | comment = *cp ? cp : comment; | |
2e73a022 | 390 | printf("%d %s %s\n", key_size(public), |
391 | key_fingerprint(public), | |
c8d54615 | 392 | comment ? comment : "no comment"); |
5260325f | 393 | } |
5260325f | 394 | } |
c8d54615 | 395 | fclose(f); |
396 | } | |
2e73a022 | 397 | key_free(public); |
c8d54615 | 398 | if (invalid) { |
399 | printf("%s is not a valid key file.\n", identity_file); | |
400 | exit(1); | |
5260325f | 401 | } |
5260325f | 402 | exit(0); |
f095fcc7 | 403 | } |
404 | ||
5260325f | 405 | /* |
406 | * Perform changing a passphrase. The argument is the passwd structure | |
407 | * for the current user. | |
408 | */ | |
f095fcc7 | 409 | void |
410 | do_change_passphrase(struct passwd *pw) | |
411 | { | |
5260325f | 412 | char *comment; |
413 | char *old_passphrase, *passphrase1, *passphrase2; | |
414 | struct stat st; | |
a306f2dd | 415 | Key *private; |
416 | Key *public; | |
fa08c86b | 417 | int type = KEY_RSA1; |
5260325f | 418 | |
419 | if (!have_identity) | |
420 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 421 | if (stat(identity_file, &st) < 0) { |
422 | perror(identity_file); | |
423 | exit(1); | |
424 | } | |
fa08c86b | 425 | public = key_new(type); |
426 | if (!load_public_key(identity_file, public, NULL)) { | |
427 | type = KEY_UNSPEC; | |
428 | } else { | |
a306f2dd | 429 | /* Clear the public key since we are just about to load the whole file. */ |
430 | key_free(public); | |
5260325f | 431 | } |
5260325f | 432 | /* Try to load the file with empty passphrase. */ |
a306f2dd | 433 | private = key_new(type); |
434 | if (!load_private_key(identity_file, "", private, &comment)) { | |
5260325f | 435 | if (identity_passphrase) |
436 | old_passphrase = xstrdup(identity_passphrase); | |
437 | else | |
438 | old_passphrase = read_passphrase("Enter old passphrase: ", 1); | |
a306f2dd | 439 | if (!load_private_key(identity_file, old_passphrase, private, &comment)) { |
5260325f | 440 | memset(old_passphrase, 0, strlen(old_passphrase)); |
441 | xfree(old_passphrase); | |
442 | printf("Bad passphrase.\n"); | |
443 | exit(1); | |
444 | } | |
5260325f | 445 | memset(old_passphrase, 0, strlen(old_passphrase)); |
446 | xfree(old_passphrase); | |
447 | } | |
448 | printf("Key has comment '%s'\n", comment); | |
449 | ||
450 | /* Ask the new passphrase (twice). */ | |
451 | if (identity_new_passphrase) { | |
452 | passphrase1 = xstrdup(identity_new_passphrase); | |
453 | passphrase2 = NULL; | |
454 | } else { | |
455 | passphrase1 = | |
456 | read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); | |
457 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
458 | ||
459 | /* Verify that they are the same. */ | |
460 | if (strcmp(passphrase1, passphrase2) != 0) { | |
461 | memset(passphrase1, 0, strlen(passphrase1)); | |
462 | memset(passphrase2, 0, strlen(passphrase2)); | |
463 | xfree(passphrase1); | |
464 | xfree(passphrase2); | |
465 | printf("Pass phrases do not match. Try again.\n"); | |
466 | exit(1); | |
467 | } | |
468 | /* Destroy the other copy. */ | |
469 | memset(passphrase2, 0, strlen(passphrase2)); | |
470 | xfree(passphrase2); | |
8efc0c15 | 471 | } |
8efc0c15 | 472 | |
5260325f | 473 | /* Save the file using the new passphrase. */ |
a306f2dd | 474 | if (!save_private_key(identity_file, passphrase1, private, comment)) { |
5260325f | 475 | printf("Saving the key failed: %s: %s.\n", |
476 | identity_file, strerror(errno)); | |
477 | memset(passphrase1, 0, strlen(passphrase1)); | |
478 | xfree(passphrase1); | |
a306f2dd | 479 | key_free(private); |
5260325f | 480 | xfree(comment); |
481 | exit(1); | |
482 | } | |
483 | /* Destroy the passphrase and the copy of the key in memory. */ | |
484 | memset(passphrase1, 0, strlen(passphrase1)); | |
485 | xfree(passphrase1); | |
a306f2dd | 486 | key_free(private); /* Destroys contents */ |
5260325f | 487 | xfree(comment); |
488 | ||
489 | printf("Your identification has been saved with the new passphrase.\n"); | |
490 | exit(0); | |
491 | } | |
8efc0c15 | 492 | |
5260325f | 493 | /* |
494 | * Change the comment of a private key file. | |
495 | */ | |
8efc0c15 | 496 | void |
497 | do_change_comment(struct passwd *pw) | |
498 | { | |
5260325f | 499 | char new_comment[1024], *comment; |
a306f2dd | 500 | Key *private; |
501 | Key *public; | |
5260325f | 502 | char *passphrase; |
503 | struct stat st; | |
504 | FILE *f; | |
5260325f | 505 | |
506 | if (!have_identity) | |
507 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 508 | if (stat(identity_file, &st) < 0) { |
509 | perror(identity_file); | |
510 | exit(1); | |
511 | } | |
aa3378df | 512 | /* |
513 | * Try to load the public key from the file the verify that it is | |
514 | * readable and of the proper format. | |
515 | */ | |
fa08c86b | 516 | public = key_new(KEY_RSA1); |
a306f2dd | 517 | if (!load_public_key(identity_file, public, NULL)) { |
5260325f | 518 | printf("%s is not a valid key file.\n", identity_file); |
519 | exit(1); | |
8efc0c15 | 520 | } |
aa3378df | 521 | |
fa08c86b | 522 | private = key_new(KEY_RSA1); |
a306f2dd | 523 | if (load_private_key(identity_file, "", private, &comment)) |
5260325f | 524 | passphrase = xstrdup(""); |
525 | else { | |
5260325f | 526 | if (identity_passphrase) |
527 | passphrase = xstrdup(identity_passphrase); | |
528 | else if (identity_new_passphrase) | |
529 | passphrase = xstrdup(identity_new_passphrase); | |
530 | else | |
531 | passphrase = read_passphrase("Enter passphrase: ", 1); | |
532 | /* Try to load using the passphrase. */ | |
a306f2dd | 533 | if (!load_private_key(identity_file, passphrase, private, &comment)) { |
5260325f | 534 | memset(passphrase, 0, strlen(passphrase)); |
535 | xfree(passphrase); | |
536 | printf("Bad passphrase.\n"); | |
537 | exit(1); | |
538 | } | |
539 | } | |
540 | printf("Key now has comment '%s'\n", comment); | |
541 | ||
542 | if (identity_comment) { | |
543 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
544 | } else { | |
545 | printf("Enter new comment: "); | |
546 | fflush(stdout); | |
547 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
548 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 549 | key_free(private); |
5260325f | 550 | exit(1); |
551 | } | |
5260325f | 552 | if (strchr(new_comment, '\n')) |
553 | *strchr(new_comment, '\n') = 0; | |
554 | } | |
555 | ||
556 | /* Save the file using the new passphrase. */ | |
a306f2dd | 557 | if (!save_private_key(identity_file, passphrase, private, new_comment)) { |
5260325f | 558 | printf("Saving the key failed: %s: %s.\n", |
559 | identity_file, strerror(errno)); | |
560 | memset(passphrase, 0, strlen(passphrase)); | |
561 | xfree(passphrase); | |
a306f2dd | 562 | key_free(private); |
5260325f | 563 | xfree(comment); |
564 | exit(1); | |
8efc0c15 | 565 | } |
5260325f | 566 | memset(passphrase, 0, strlen(passphrase)); |
567 | xfree(passphrase); | |
a306f2dd | 568 | key_free(private); |
5260325f | 569 | |
5260325f | 570 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
571 | f = fopen(identity_file, "w"); | |
572 | if (!f) { | |
573 | printf("Could not save your public key in %s\n", identity_file); | |
574 | exit(1); | |
575 | } | |
a306f2dd | 576 | if (!key_write(public, f)) |
577 | fprintf(stderr, "write key failed"); | |
578 | key_free(public); | |
579 | fprintf(f, " %s\n", new_comment); | |
5260325f | 580 | fclose(f); |
581 | ||
582 | xfree(comment); | |
583 | ||
584 | printf("The comment in your key file has been changed.\n"); | |
585 | exit(0); | |
8efc0c15 | 586 | } |
587 | ||
5ad13cd7 | 588 | void |
589 | usage(void) | |
590 | { | |
fa08c86b | 591 | printf("Usage: %s [-lpqxXyc] [-t type] [-b bits] [-f file] [-C comment] [-N new-pass] [-P pass]\n", __progname); |
5260325f | 592 | exit(1); |
5ad13cd7 | 593 | } |
594 | ||
5260325f | 595 | /* |
596 | * Main program for key management. | |
597 | */ | |
8efc0c15 | 598 | int |
599 | main(int ac, char **av) | |
600 | { | |
5260325f | 601 | char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
602 | struct passwd *pw; | |
5260325f | 603 | int opt; |
604 | struct stat st; | |
605 | FILE *f; | |
fa08c86b | 606 | int type = KEY_RSA1; |
a306f2dd | 607 | Key *private; |
608 | Key *public; | |
fa08c86b | 609 | |
5260325f | 610 | extern int optind; |
611 | extern char *optarg; | |
612 | ||
264dce47 | 613 | init_rng(); |
614 | ||
fa649821 | 615 | SSLeay_add_all_algorithms(); |
a306f2dd | 616 | |
aa3378df | 617 | /* we need this for the home * directory. */ |
5260325f | 618 | pw = getpwuid(getuid()); |
619 | if (!pw) { | |
620 | printf("You don't exist, go away!\n"); | |
621 | exit(1); | |
622 | } | |
a306f2dd | 623 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
624 | perror("gethostname"); | |
625 | exit(1); | |
626 | } | |
aa3378df | 627 | |
fa08c86b | 628 | while ((opt = getopt(ac, av, "dqpclRxXyb:f:t:P:N:C:")) != EOF) { |
5260325f | 629 | switch (opt) { |
630 | case 'b': | |
631 | bits = atoi(optarg); | |
632 | if (bits < 512 || bits > 32768) { | |
633 | printf("Bits has bad value.\n"); | |
634 | exit(1); | |
635 | } | |
636 | break; | |
637 | ||
638 | case 'l': | |
639 | print_fingerprint = 1; | |
640 | break; | |
641 | ||
642 | case 'p': | |
643 | change_passphrase = 1; | |
644 | break; | |
645 | ||
646 | case 'c': | |
647 | change_comment = 1; | |
648 | break; | |
649 | ||
650 | case 'f': | |
651 | strlcpy(identity_file, optarg, sizeof(identity_file)); | |
652 | have_identity = 1; | |
653 | break; | |
654 | ||
655 | case 'P': | |
656 | identity_passphrase = optarg; | |
657 | break; | |
658 | ||
659 | case 'N': | |
660 | identity_new_passphrase = optarg; | |
661 | break; | |
662 | ||
663 | case 'C': | |
664 | identity_comment = optarg; | |
665 | break; | |
666 | ||
667 | case 'q': | |
668 | quiet = 1; | |
669 | break; | |
670 | ||
a306f2dd | 671 | case 'R': |
fa08c86b | 672 | /* unused */ |
673 | exit(0); | |
a306f2dd | 674 | break; |
675 | ||
676 | case 'x': | |
677 | convert_to_ssh2 = 1; | |
678 | break; | |
679 | ||
680 | case 'X': | |
681 | convert_from_ssh2 = 1; | |
682 | break; | |
683 | ||
684 | case 'y': | |
685 | print_public = 1; | |
686 | break; | |
687 | ||
688 | case 'd': | |
fa08c86b | 689 | key_type_name = "dsa"; |
a306f2dd | 690 | dsa_mode = 1; |
691 | break; | |
692 | ||
fa08c86b | 693 | case 't': |
694 | key_type_name = optarg; | |
695 | dsa_mode = (strcmp(optarg, "dsa") == 0); | |
696 | break; | |
697 | ||
5260325f | 698 | case '?': |
699 | default: | |
700 | usage(); | |
701 | } | |
702 | } | |
703 | if (optind < ac) { | |
704 | printf("Too many arguments.\n"); | |
705 | usage(); | |
706 | } | |
707 | if (change_passphrase && change_comment) { | |
708 | printf("Can only have one of -p and -c.\n"); | |
709 | usage(); | |
710 | } | |
711 | if (print_fingerprint) | |
712 | do_fingerprint(pw); | |
5260325f | 713 | if (change_passphrase) |
714 | do_change_passphrase(pw); | |
5260325f | 715 | if (change_comment) |
716 | do_change_comment(pw); | |
a306f2dd | 717 | if (convert_to_ssh2) |
718 | do_convert_to_ssh2(pw); | |
719 | if (convert_from_ssh2) | |
720 | do_convert_from_ssh2(pw); | |
721 | if (print_public) | |
722 | do_print_public(pw); | |
5260325f | 723 | |
724 | arc4random_stir(); | |
725 | ||
fa08c86b | 726 | if (key_type_name != NULL) { |
727 | type = key_type_from_name(key_type_name); | |
728 | if (type == KEY_UNSPEC) { | |
729 | fprintf(stderr, "unknown key type %s", key_type_name); | |
a306f2dd | 730 | exit(1); |
731 | } | |
a306f2dd | 732 | } |
fa08c86b | 733 | if (!quiet) |
734 | printf("Generating public/private key pair.\n"); | |
735 | private = key_generate(type, bits); | |
736 | if (private == NULL) { | |
737 | fprintf(stderr, "key_generate failed"); | |
738 | exit(1); | |
739 | } | |
740 | public = key_from_private(private); | |
5260325f | 741 | |
742 | if (!have_identity) | |
743 | ask_filename(pw, "Enter file in which to save the key"); | |
744 | ||
745 | /* Create ~/.ssh directory if it doesn\'t already exist. */ | |
746 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, SSH_USER_DIR); | |
747 | if (strstr(identity_file, dotsshdir) != NULL && | |
748 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 749 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 750 | error("Could not create directory '%s'.", dotsshdir); |
751 | else if (!quiet) | |
752 | printf("Created directory '%s'.\n", dotsshdir); | |
753 | } | |
754 | /* If the file already exists, ask the user to confirm. */ | |
755 | if (stat(identity_file, &st) >= 0) { | |
756 | char yesno[3]; | |
757 | printf("%s already exists.\n", identity_file); | |
758 | printf("Overwrite (y/n)? "); | |
759 | fflush(stdout); | |
760 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
761 | exit(1); | |
762 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
763 | exit(1); | |
764 | } | |
765 | /* Ask for a passphrase (twice). */ | |
766 | if (identity_passphrase) | |
767 | passphrase1 = xstrdup(identity_passphrase); | |
768 | else if (identity_new_passphrase) | |
769 | passphrase1 = xstrdup(identity_new_passphrase); | |
770 | else { | |
771 | passphrase_again: | |
772 | passphrase1 = | |
773 | read_passphrase("Enter passphrase (empty for no passphrase): ", 1); | |
774 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
775 | if (strcmp(passphrase1, passphrase2) != 0) { | |
776 | /* The passphrases do not match. Clear them and retry. */ | |
777 | memset(passphrase1, 0, strlen(passphrase1)); | |
778 | memset(passphrase2, 0, strlen(passphrase2)); | |
779 | xfree(passphrase1); | |
780 | xfree(passphrase2); | |
781 | printf("Passphrases do not match. Try again.\n"); | |
782 | goto passphrase_again; | |
783 | } | |
784 | /* Clear the other copy of the passphrase. */ | |
785 | memset(passphrase2, 0, strlen(passphrase2)); | |
786 | xfree(passphrase2); | |
787 | } | |
788 | ||
5260325f | 789 | if (identity_comment) { |
790 | strlcpy(comment, identity_comment, sizeof(comment)); | |
791 | } else { | |
6ae2364d | 792 | /* Create default commend field for the passphrase. */ |
5260325f | 793 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
794 | } | |
795 | ||
796 | /* Save the key with the given passphrase and comment. */ | |
a306f2dd | 797 | if (!save_private_key(identity_file, passphrase1, private, comment)) { |
5260325f | 798 | printf("Saving the key failed: %s: %s.\n", |
a306f2dd | 799 | identity_file, strerror(errno)); |
5260325f | 800 | memset(passphrase1, 0, strlen(passphrase1)); |
801 | xfree(passphrase1); | |
802 | exit(1); | |
803 | } | |
804 | /* Clear the passphrase. */ | |
805 | memset(passphrase1, 0, strlen(passphrase1)); | |
806 | xfree(passphrase1); | |
807 | ||
808 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 809 | key_free(private); |
5260325f | 810 | arc4random_stir(); |
811 | ||
812 | if (!quiet) | |
813 | printf("Your identification has been saved in %s.\n", identity_file); | |
814 | ||
5260325f | 815 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
816 | f = fopen(identity_file, "w"); | |
817 | if (!f) { | |
818 | printf("Could not save your public key in %s\n", identity_file); | |
819 | exit(1); | |
820 | } | |
a306f2dd | 821 | if (!key_write(public, f)) |
822 | fprintf(stderr, "write key failed"); | |
823 | fprintf(f, " %s\n", comment); | |
5260325f | 824 | fclose(f); |
825 | ||
826 | if (!quiet) { | |
a306f2dd | 827 | printf("Your public key has been saved in %s.\n", |
828 | identity_file); | |
5260325f | 829 | printf("The key fingerprint is:\n"); |
a306f2dd | 830 | printf("%s %s\n", key_fingerprint(public), comment); |
8efc0c15 | 831 | } |
a306f2dd | 832 | |
833 | key_free(public); | |
5260325f | 834 | exit(0); |
8efc0c15 | 835 | } |