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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" | |
22138a36 | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.50 2001/03/12 22:02:02 markus Exp $"); |
8efc0c15 | 16 | |
a306f2dd | 17 | #include <openssl/evp.h> |
18 | #include <openssl/pem.h> | |
a306f2dd | 19 | |
8efc0c15 | 20 | #include "xmalloc.h" |
a306f2dd | 21 | #include "key.h" |
a306f2dd | 22 | #include "authfile.h" |
23 | #include "uuencode.h" | |
94ec8c6b | 24 | #include "buffer.h" |
25 | #include "bufaux.h" | |
42f11eb2 | 26 | #include "pathnames.h" |
27 | #include "log.h" | |
28 | #include "readpass.h" | |
94ec8c6b | 29 | |
a306f2dd | 30 | /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
8efc0c15 | 31 | int bits = 1024; |
32 | ||
aa3378df | 33 | /* |
34 | * Flag indicating that we just want to change the passphrase. This can be | |
35 | * set on the command line. | |
36 | */ | |
8efc0c15 | 37 | int change_passphrase = 0; |
38 | ||
aa3378df | 39 | /* |
40 | * Flag indicating that we just want to change the comment. This can be set | |
41 | * on the command line. | |
42 | */ | |
8efc0c15 | 43 | int change_comment = 0; |
44 | ||
45 | int quiet = 0; | |
46 | ||
f095fcc7 | 47 | /* Flag indicating that we just want to see the key fingerprint */ |
48 | int print_fingerprint = 0; | |
aaf45d87 | 49 | int print_bubblebabble = 0; |
f095fcc7 | 50 | |
5ad13cd7 | 51 | /* The identity file name, given on the command line or entered by the user. */ |
52 | char identity_file[1024]; | |
53 | int have_identity = 0; | |
8efc0c15 | 54 | |
55 | /* This is set to the passphrase if given on the command line. */ | |
56 | char *identity_passphrase = NULL; | |
57 | ||
58 | /* This is set to the new passphrase if given on the command line. */ | |
59 | char *identity_new_passphrase = NULL; | |
60 | ||
61 | /* This is set to the new comment if given on the command line. */ | |
62 | char *identity_comment = NULL; | |
63 | ||
a306f2dd | 64 | /* Dump public key file in format used by real and the original SSH 2 */ |
65 | int convert_to_ssh2 = 0; | |
66 | int convert_from_ssh2 = 0; | |
67 | int print_public = 0; | |
fa08c86b | 68 | |
c523303b | 69 | /* default to RSA for SSH-1 */ |
70 | char *key_type_name = "rsa1"; | |
a306f2dd | 71 | |
5ad13cd7 | 72 | /* argv0 */ |
5260325f | 73 | #ifdef HAVE___PROGNAME |
5ad13cd7 | 74 | extern char *__progname; |
260d427b | 75 | #else |
76 | char *__progname; | |
77 | #endif | |
8efc0c15 | 78 | |
a306f2dd | 79 | char hostname[MAXHOSTNAMELEN]; |
80 | ||
5ad13cd7 | 81 | void |
82 | ask_filename(struct passwd *pw, const char *prompt) | |
8efc0c15 | 83 | { |
5260325f | 84 | char buf[1024]; |
c523303b | 85 | char *name = NULL; |
86 | ||
87 | switch (key_type_from_name(key_type_name)) { | |
88 | case KEY_RSA1: | |
42f11eb2 | 89 | name = _PATH_SSH_CLIENT_IDENTITY; |
c523303b | 90 | break; |
91 | case KEY_DSA: | |
42f11eb2 | 92 | name = _PATH_SSH_CLIENT_ID_DSA; |
c523303b | 93 | break; |
94 | case KEY_RSA: | |
42f11eb2 | 95 | name = _PATH_SSH_CLIENT_ID_RSA; |
c523303b | 96 | break; |
97 | default: | |
98 | fprintf(stderr, "bad key type"); | |
99 | exit(1); | |
100 | break; | |
101 | } | |
102 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); | |
8d88011e | 103 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
104 | fflush(stderr); | |
5260325f | 105 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
106 | exit(1); | |
107 | if (strchr(buf, '\n')) | |
108 | *strchr(buf, '\n') = 0; | |
109 | if (strcmp(buf, "") != 0) | |
110 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
111 | have_identity = 1; | |
f095fcc7 | 112 | } |
8efc0c15 | 113 | |
a306f2dd | 114 | int |
115 | try_load_key(char *filename, Key *k) | |
116 | { | |
117 | int success = 1; | |
118 | if (!load_private_key(filename, "", k, NULL)) { | |
119 | char *pass = read_passphrase("Enter passphrase: ", 1); | |
120 | if (!load_private_key(filename, pass, k, NULL)) { | |
121 | success = 0; | |
122 | } | |
123 | memset(pass, 0, strlen(pass)); | |
124 | xfree(pass); | |
125 | } | |
126 | return success; | |
127 | } | |
128 | ||
94ec8c6b | 129 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
130 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" | |
131 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" | |
2b87da3b | 132 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 133 | |
134 | void | |
135 | do_convert_to_ssh2(struct passwd *pw) | |
136 | { | |
137 | Key *k; | |
138 | int len; | |
1e3b8b07 | 139 | u_char *blob; |
a306f2dd | 140 | struct stat st; |
141 | ||
142 | if (!have_identity) | |
143 | ask_filename(pw, "Enter file in which the key is"); | |
144 | if (stat(identity_file, &st) < 0) { | |
145 | perror(identity_file); | |
146 | exit(1); | |
147 | } | |
fa08c86b | 148 | k = key_new(KEY_UNSPEC); |
a306f2dd | 149 | if (!try_load_key(identity_file, k)) { |
150 | fprintf(stderr, "load failed\n"); | |
151 | exit(1); | |
152 | } | |
fa08c86b | 153 | key_to_blob(k, &blob, &len); |
94ec8c6b | 154 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 155 | fprintf(stdout, |
94ec8c6b | 156 | "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
157 | key_size(k), key_type(k), | |
a306f2dd | 158 | pw->pw_name, hostname); |
159 | dump_base64(stdout, blob, len); | |
94ec8c6b | 160 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
a306f2dd | 161 | key_free(k); |
162 | xfree(blob); | |
163 | exit(0); | |
164 | } | |
165 | ||
94ec8c6b | 166 | void |
167 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) | |
168 | { | |
169 | int bits = buffer_get_int(b); | |
170 | int bytes = (bits + 7) / 8; | |
171 | if (buffer_len(b) < bytes) | |
172 | fatal("buffer_get_bignum_bits: input buffer too small"); | |
1e3b8b07 | 173 | BN_bin2bn((u_char *)buffer_ptr(b), bytes, value); |
94ec8c6b | 174 | buffer_consume(b, bytes); |
175 | } | |
176 | ||
177 | Key * | |
178 | do_convert_private_ssh2_from_blob(char *blob, int blen) | |
179 | { | |
180 | Buffer b; | |
181 | DSA *dsa; | |
182 | Key *key = NULL; | |
183 | int ignore, magic, rlen; | |
184 | char *type, *cipher; | |
185 | ||
186 | buffer_init(&b); | |
187 | buffer_append(&b, blob, blen); | |
188 | ||
189 | magic = buffer_get_int(&b); | |
190 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
191 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
192 | buffer_free(&b); | |
193 | return NULL; | |
194 | } | |
195 | ignore = buffer_get_int(&b); | |
196 | type = buffer_get_string(&b, NULL); | |
197 | cipher = buffer_get_string(&b, NULL); | |
198 | ignore = buffer_get_int(&b); | |
199 | ignore = buffer_get_int(&b); | |
200 | ignore = buffer_get_int(&b); | |
201 | xfree(type); | |
202 | ||
203 | if (strcmp(cipher, "none") != 0) { | |
204 | error("unsupported cipher %s", cipher); | |
205 | xfree(cipher); | |
206 | buffer_free(&b); | |
207 | return NULL; | |
208 | } | |
209 | xfree(cipher); | |
210 | ||
211 | key = key_new(KEY_DSA); | |
212 | dsa = key->dsa; | |
213 | dsa->priv_key = BN_new(); | |
214 | if (dsa->priv_key == NULL) { | |
215 | error("alloc priv_key failed"); | |
216 | key_free(key); | |
217 | return NULL; | |
218 | } | |
219 | buffer_get_bignum_bits(&b, dsa->p); | |
220 | buffer_get_bignum_bits(&b, dsa->g); | |
221 | buffer_get_bignum_bits(&b, dsa->q); | |
222 | buffer_get_bignum_bits(&b, dsa->pub_key); | |
223 | buffer_get_bignum_bits(&b, dsa->priv_key); | |
224 | rlen = buffer_len(&b); | |
225 | if(rlen != 0) | |
226 | error("do_convert_private_ssh2_from_blob: remaining bytes in key blob %d", rlen); | |
227 | buffer_free(&b); | |
228 | return key; | |
229 | } | |
230 | ||
a306f2dd | 231 | void |
232 | do_convert_from_ssh2(struct passwd *pw) | |
233 | { | |
234 | Key *k; | |
235 | int blen; | |
236 | char line[1024], *p; | |
237 | char blob[8096]; | |
238 | char encoded[8096]; | |
239 | struct stat st; | |
94ec8c6b | 240 | int escaped = 0, private = 0, ok; |
a306f2dd | 241 | FILE *fp; |
242 | ||
243 | if (!have_identity) | |
244 | ask_filename(pw, "Enter file in which the key is"); | |
245 | if (stat(identity_file, &st) < 0) { | |
246 | perror(identity_file); | |
247 | exit(1); | |
248 | } | |
249 | fp = fopen(identity_file, "r"); | |
250 | if (fp == NULL) { | |
251 | perror(identity_file); | |
252 | exit(1); | |
253 | } | |
254 | encoded[0] = '\0'; | |
255 | while (fgets(line, sizeof(line), fp)) { | |
d0c832f3 | 256 | if (!(p = strchr(line, '\n'))) { |
257 | fprintf(stderr, "input line too long.\n"); | |
258 | exit(1); | |
259 | } | |
260 | if (p > line && p[-1] == '\\') | |
261 | escaped++; | |
a306f2dd | 262 | if (strncmp(line, "----", 4) == 0 || |
263 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 264 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
265 | private = 1; | |
a306f2dd | 266 | fprintf(stderr, "ignore: %s", line); |
267 | continue; | |
268 | } | |
d0c832f3 | 269 | if (escaped) { |
270 | escaped--; | |
271 | fprintf(stderr, "escaped: %s", line); | |
272 | continue; | |
a306f2dd | 273 | } |
274 | *p = '\0'; | |
275 | strlcat(encoded, line, sizeof(encoded)); | |
276 | } | |
1e3b8b07 | 277 | blen = uudecode(encoded, (u_char *)blob, sizeof(blob)); |
a306f2dd | 278 | if (blen < 0) { |
279 | fprintf(stderr, "uudecode failed.\n"); | |
280 | exit(1); | |
281 | } | |
94ec8c6b | 282 | k = private ? |
283 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 284 | key_from_blob(blob, blen); |
94ec8c6b | 285 | if (k == NULL) { |
286 | fprintf(stderr, "decode blob failed.\n"); | |
287 | exit(1); | |
288 | } | |
289 | ok = private ? | |
290 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
291 | key_write(k, stdout); | |
292 | if (!ok) { | |
293 | fprintf(stderr, "key write failed"); | |
294 | exit(1); | |
295 | } | |
a306f2dd | 296 | key_free(k); |
297 | fprintf(stdout, "\n"); | |
298 | fclose(fp); | |
299 | exit(0); | |
300 | } | |
301 | ||
302 | void | |
303 | do_print_public(struct passwd *pw) | |
304 | { | |
305 | Key *k; | |
a306f2dd | 306 | struct stat st; |
307 | ||
308 | if (!have_identity) | |
309 | ask_filename(pw, "Enter file in which the key is"); | |
310 | if (stat(identity_file, &st) < 0) { | |
311 | perror(identity_file); | |
312 | exit(1); | |
313 | } | |
fa08c86b | 314 | k = key_new(KEY_UNSPEC); |
a306f2dd | 315 | if (!try_load_key(identity_file, k)) { |
316 | fprintf(stderr, "load failed\n"); | |
317 | exit(1); | |
318 | } | |
a306f2dd | 319 | if (!key_write(k, stdout)) |
320 | fprintf(stderr, "key_write failed"); | |
321 | key_free(k); | |
a306f2dd | 322 | fprintf(stdout, "\n"); |
323 | exit(0); | |
324 | } | |
325 | ||
f095fcc7 | 326 | void |
327 | do_fingerprint(struct passwd *pw) | |
328 | { | |
c8d54615 | 329 | FILE *f; |
a306f2dd | 330 | Key *public; |
aaf45d87 | 331 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
332 | int i, skip = 0, num = 1, invalid = 1, success = 0, rep, type; | |
5260325f | 333 | struct stat st; |
334 | ||
aaf45d87 | 335 | type = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
336 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
337 | ||
5260325f | 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 | |
efcae5b1 | 353 | debug("try_load_public_key KEY_UNSPEC failed"); |
fa08c86b | 354 | } |
355 | if (success) { | |
22138a36 | 356 | fp = key_fingerprint(public, type, rep); |
aaf45d87 | 357 | printf("%d %s %s\n", key_size(public), |
358 | fp, comment); | |
a306f2dd | 359 | key_free(public); |
fa08c86b | 360 | xfree(comment); |
aaf45d87 | 361 | xfree(fp); |
c8d54615 | 362 | exit(0); |
363 | } | |
c8d54615 | 364 | |
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; | |
efcae5b1 | 401 | public = key_new(KEY_RSA1); |
402 | if (key_read(public, &cp) != 1) { | |
403 | cp = ep; | |
404 | key_free(public); | |
405 | public = key_new(KEY_UNSPEC); | |
406 | if (key_read(public, &cp) != 1) { | |
407 | key_free(public); | |
408 | continue; | |
409 | } | |
5260325f | 410 | } |
efcae5b1 | 411 | comment = *cp ? cp : comment; |
22138a36 | 412 | fp = key_fingerprint(public, type, rep); |
aaf45d87 | 413 | printf("%d %s %s\n", key_size(public), fp, |
efcae5b1 | 414 | comment ? comment : "no comment"); |
aaf45d87 | 415 | xfree(fp); |
efcae5b1 | 416 | invalid = 0; |
5260325f | 417 | } |
c8d54615 | 418 | fclose(f); |
419 | } | |
2e73a022 | 420 | key_free(public); |
c8d54615 | 421 | if (invalid) { |
422 | printf("%s is not a valid key file.\n", identity_file); | |
423 | exit(1); | |
5260325f | 424 | } |
5260325f | 425 | exit(0); |
f095fcc7 | 426 | } |
427 | ||
5260325f | 428 | /* |
429 | * Perform changing a passphrase. The argument is the passwd structure | |
430 | * for the current user. | |
431 | */ | |
f095fcc7 | 432 | void |
433 | do_change_passphrase(struct passwd *pw) | |
434 | { | |
5260325f | 435 | char *comment; |
436 | char *old_passphrase, *passphrase1, *passphrase2; | |
437 | struct stat st; | |
a306f2dd | 438 | Key *private; |
439 | Key *public; | |
fa08c86b | 440 | int type = KEY_RSA1; |
5260325f | 441 | |
442 | if (!have_identity) | |
443 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 444 | if (stat(identity_file, &st) < 0) { |
445 | perror(identity_file); | |
446 | exit(1); | |
447 | } | |
fa08c86b | 448 | public = key_new(type); |
449 | if (!load_public_key(identity_file, public, NULL)) { | |
450 | type = KEY_UNSPEC; | |
451 | } else { | |
a306f2dd | 452 | /* Clear the public key since we are just about to load the whole file. */ |
453 | key_free(public); | |
5260325f | 454 | } |
5260325f | 455 | /* Try to load the file with empty passphrase. */ |
a306f2dd | 456 | private = key_new(type); |
457 | if (!load_private_key(identity_file, "", private, &comment)) { | |
5260325f | 458 | if (identity_passphrase) |
459 | old_passphrase = xstrdup(identity_passphrase); | |
460 | else | |
461 | old_passphrase = read_passphrase("Enter old passphrase: ", 1); | |
a306f2dd | 462 | if (!load_private_key(identity_file, old_passphrase, private, &comment)) { |
5260325f | 463 | memset(old_passphrase, 0, strlen(old_passphrase)); |
464 | xfree(old_passphrase); | |
465 | printf("Bad passphrase.\n"); | |
466 | exit(1); | |
467 | } | |
5260325f | 468 | memset(old_passphrase, 0, strlen(old_passphrase)); |
469 | xfree(old_passphrase); | |
470 | } | |
471 | printf("Key has comment '%s'\n", comment); | |
472 | ||
473 | /* Ask the new passphrase (twice). */ | |
474 | if (identity_new_passphrase) { | |
475 | passphrase1 = xstrdup(identity_new_passphrase); | |
476 | passphrase2 = NULL; | |
477 | } else { | |
478 | passphrase1 = | |
479 | read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); | |
480 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
481 | ||
482 | /* Verify that they are the same. */ | |
483 | if (strcmp(passphrase1, passphrase2) != 0) { | |
484 | memset(passphrase1, 0, strlen(passphrase1)); | |
485 | memset(passphrase2, 0, strlen(passphrase2)); | |
486 | xfree(passphrase1); | |
487 | xfree(passphrase2); | |
488 | printf("Pass phrases do not match. Try again.\n"); | |
489 | exit(1); | |
490 | } | |
491 | /* Destroy the other copy. */ | |
492 | memset(passphrase2, 0, strlen(passphrase2)); | |
493 | xfree(passphrase2); | |
8efc0c15 | 494 | } |
8efc0c15 | 495 | |
5260325f | 496 | /* Save the file using the new passphrase. */ |
a306f2dd | 497 | if (!save_private_key(identity_file, passphrase1, private, comment)) { |
5260325f | 498 | printf("Saving the key failed: %s: %s.\n", |
499 | identity_file, strerror(errno)); | |
500 | memset(passphrase1, 0, strlen(passphrase1)); | |
501 | xfree(passphrase1); | |
a306f2dd | 502 | key_free(private); |
5260325f | 503 | xfree(comment); |
504 | exit(1); | |
505 | } | |
506 | /* Destroy the passphrase and the copy of the key in memory. */ | |
507 | memset(passphrase1, 0, strlen(passphrase1)); | |
508 | xfree(passphrase1); | |
a306f2dd | 509 | key_free(private); /* Destroys contents */ |
5260325f | 510 | xfree(comment); |
511 | ||
512 | printf("Your identification has been saved with the new passphrase.\n"); | |
513 | exit(0); | |
514 | } | |
8efc0c15 | 515 | |
5260325f | 516 | /* |
517 | * Change the comment of a private key file. | |
518 | */ | |
8efc0c15 | 519 | void |
520 | do_change_comment(struct passwd *pw) | |
521 | { | |
1c9a907f | 522 | char new_comment[1024], *comment, *passphrase; |
523 | Key *private, *public; | |
5260325f | 524 | struct stat st; |
525 | FILE *f; | |
1c9a907f | 526 | int fd; |
5260325f | 527 | |
528 | if (!have_identity) | |
529 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 530 | if (stat(identity_file, &st) < 0) { |
531 | perror(identity_file); | |
532 | exit(1); | |
533 | } | |
aa3378df | 534 | /* |
535 | * Try to load the public key from the file the verify that it is | |
536 | * readable and of the proper format. | |
537 | */ | |
fa08c86b | 538 | public = key_new(KEY_RSA1); |
a306f2dd | 539 | if (!load_public_key(identity_file, public, NULL)) { |
5260325f | 540 | printf("%s is not a valid key file.\n", identity_file); |
15853e93 | 541 | printf("Comments are only supported in RSA1 keys\n"); |
5260325f | 542 | exit(1); |
8efc0c15 | 543 | } |
aa3378df | 544 | |
fa08c86b | 545 | private = key_new(KEY_RSA1); |
a306f2dd | 546 | if (load_private_key(identity_file, "", private, &comment)) |
5260325f | 547 | passphrase = xstrdup(""); |
548 | else { | |
5260325f | 549 | if (identity_passphrase) |
550 | passphrase = xstrdup(identity_passphrase); | |
551 | else if (identity_new_passphrase) | |
552 | passphrase = xstrdup(identity_new_passphrase); | |
553 | else | |
554 | passphrase = read_passphrase("Enter passphrase: ", 1); | |
555 | /* Try to load using the passphrase. */ | |
a306f2dd | 556 | if (!load_private_key(identity_file, passphrase, private, &comment)) { |
5260325f | 557 | memset(passphrase, 0, strlen(passphrase)); |
558 | xfree(passphrase); | |
559 | printf("Bad passphrase.\n"); | |
560 | exit(1); | |
561 | } | |
562 | } | |
563 | printf("Key now has comment '%s'\n", comment); | |
564 | ||
565 | if (identity_comment) { | |
566 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
567 | } else { | |
568 | printf("Enter new comment: "); | |
569 | fflush(stdout); | |
570 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
571 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 572 | key_free(private); |
5260325f | 573 | exit(1); |
574 | } | |
5260325f | 575 | if (strchr(new_comment, '\n')) |
576 | *strchr(new_comment, '\n') = 0; | |
577 | } | |
578 | ||
579 | /* Save the file using the new passphrase. */ | |
a306f2dd | 580 | if (!save_private_key(identity_file, passphrase, private, new_comment)) { |
5260325f | 581 | printf("Saving the key failed: %s: %s.\n", |
582 | identity_file, strerror(errno)); | |
583 | memset(passphrase, 0, strlen(passphrase)); | |
584 | xfree(passphrase); | |
a306f2dd | 585 | key_free(private); |
5260325f | 586 | xfree(comment); |
587 | exit(1); | |
8efc0c15 | 588 | } |
5260325f | 589 | memset(passphrase, 0, strlen(passphrase)); |
590 | xfree(passphrase); | |
a306f2dd | 591 | key_free(private); |
5260325f | 592 | |
5260325f | 593 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 594 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
595 | if (fd == -1) { | |
5260325f | 596 | printf("Could not save your public key in %s\n", identity_file); |
597 | exit(1); | |
598 | } | |
1c9a907f | 599 | f = fdopen(fd, "w"); |
600 | if (f == NULL) { | |
601 | printf("fdopen %s failed", identity_file); | |
602 | exit(1); | |
603 | } | |
a306f2dd | 604 | if (!key_write(public, f)) |
605 | fprintf(stderr, "write key failed"); | |
606 | key_free(public); | |
607 | fprintf(f, " %s\n", new_comment); | |
5260325f | 608 | fclose(f); |
609 | ||
610 | xfree(comment); | |
611 | ||
612 | printf("The comment in your key file has been changed.\n"); | |
613 | exit(0); | |
8efc0c15 | 614 | } |
615 | ||
5ad13cd7 | 616 | void |
617 | usage(void) | |
618 | { | |
b07ae1e9 | 619 | printf("Usage: %s [-lpqxXyc] [-t type] [-b bits] [-f file] [-C comment] " |
ed2166d8 | 620 | "[-N new-pass] [-P pass]\n", __progname); |
5260325f | 621 | exit(1); |
5ad13cd7 | 622 | } |
623 | ||
5260325f | 624 | /* |
625 | * Main program for key management. | |
626 | */ | |
8efc0c15 | 627 | int |
628 | main(int ac, char **av) | |
629 | { | |
5260325f | 630 | char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
1c9a907f | 631 | Key *private, *public; |
5260325f | 632 | struct passwd *pw; |
1c9a907f | 633 | int opt, type, fd; |
5260325f | 634 | struct stat st; |
635 | FILE *f; | |
fa08c86b | 636 | |
5260325f | 637 | extern int optind; |
638 | extern char *optarg; | |
639 | ||
260d427b | 640 | __progname = get_progname(av[0]); |
264dce47 | 641 | init_rng(); |
642 | ||
fa649821 | 643 | SSLeay_add_all_algorithms(); |
a306f2dd | 644 | |
aa3378df | 645 | /* we need this for the home * directory. */ |
5260325f | 646 | pw = getpwuid(getuid()); |
647 | if (!pw) { | |
648 | printf("You don't exist, go away!\n"); | |
649 | exit(1); | |
650 | } | |
a306f2dd | 651 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
652 | perror("gethostname"); | |
653 | exit(1); | |
654 | } | |
aa3378df | 655 | |
aaf45d87 | 656 | while ((opt = getopt(ac, av, "dqpclBRxXyb:f:t:P:N:C:")) != -1) { |
5260325f | 657 | switch (opt) { |
658 | case 'b': | |
659 | bits = atoi(optarg); | |
660 | if (bits < 512 || bits > 32768) { | |
661 | printf("Bits has bad value.\n"); | |
662 | exit(1); | |
663 | } | |
664 | break; | |
665 | ||
666 | case 'l': | |
667 | print_fingerprint = 1; | |
668 | break; | |
669 | ||
aaf45d87 | 670 | case 'B': |
671 | print_bubblebabble = 1; | |
672 | break; | |
673 | ||
5260325f | 674 | case 'p': |
675 | change_passphrase = 1; | |
676 | break; | |
677 | ||
678 | case 'c': | |
679 | change_comment = 1; | |
680 | break; | |
681 | ||
682 | case 'f': | |
683 | strlcpy(identity_file, optarg, sizeof(identity_file)); | |
684 | have_identity = 1; | |
685 | break; | |
686 | ||
687 | case 'P': | |
688 | identity_passphrase = optarg; | |
689 | break; | |
690 | ||
691 | case 'N': | |
692 | identity_new_passphrase = optarg; | |
693 | break; | |
694 | ||
695 | case 'C': | |
696 | identity_comment = optarg; | |
697 | break; | |
698 | ||
699 | case 'q': | |
700 | quiet = 1; | |
701 | break; | |
702 | ||
a306f2dd | 703 | case 'R': |
fa08c86b | 704 | /* unused */ |
705 | exit(0); | |
a306f2dd | 706 | break; |
707 | ||
708 | case 'x': | |
709 | convert_to_ssh2 = 1; | |
710 | break; | |
711 | ||
712 | case 'X': | |
713 | convert_from_ssh2 = 1; | |
714 | break; | |
715 | ||
716 | case 'y': | |
717 | print_public = 1; | |
718 | break; | |
954f0550 | 719 | |
a306f2dd | 720 | case 'd': |
fa08c86b | 721 | key_type_name = "dsa"; |
a306f2dd | 722 | break; |
723 | ||
fa08c86b | 724 | case 't': |
725 | key_type_name = optarg; | |
fa08c86b | 726 | break; |
727 | ||
5260325f | 728 | case '?': |
729 | default: | |
730 | usage(); | |
731 | } | |
732 | } | |
733 | if (optind < ac) { | |
734 | printf("Too many arguments.\n"); | |
735 | usage(); | |
736 | } | |
737 | if (change_passphrase && change_comment) { | |
738 | printf("Can only have one of -p and -c.\n"); | |
739 | usage(); | |
740 | } | |
aaf45d87 | 741 | if (print_fingerprint || print_bubblebabble) |
5260325f | 742 | do_fingerprint(pw); |
5260325f | 743 | if (change_passphrase) |
744 | do_change_passphrase(pw); | |
5260325f | 745 | if (change_comment) |
746 | do_change_comment(pw); | |
a306f2dd | 747 | if (convert_to_ssh2) |
748 | do_convert_to_ssh2(pw); | |
749 | if (convert_from_ssh2) | |
750 | do_convert_from_ssh2(pw); | |
751 | if (print_public) | |
752 | do_print_public(pw); | |
5260325f | 753 | |
754 | arc4random_stir(); | |
755 | ||
c523303b | 756 | type = key_type_from_name(key_type_name); |
757 | if (type == KEY_UNSPEC) { | |
758 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
759 | exit(1); | |
a306f2dd | 760 | } |
fa08c86b | 761 | if (!quiet) |
c523303b | 762 | printf("Generating public/private %s key pair.\n", key_type_name); |
fa08c86b | 763 | private = key_generate(type, bits); |
764 | if (private == NULL) { | |
765 | fprintf(stderr, "key_generate failed"); | |
766 | exit(1); | |
767 | } | |
768 | public = key_from_private(private); | |
5260325f | 769 | |
770 | if (!have_identity) | |
771 | ask_filename(pw, "Enter file in which to save the key"); | |
772 | ||
773 | /* Create ~/.ssh directory if it doesn\'t already exist. */ | |
42f11eb2 | 774 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 775 | if (strstr(identity_file, dotsshdir) != NULL && |
776 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 777 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 778 | error("Could not create directory '%s'.", dotsshdir); |
779 | else if (!quiet) | |
780 | printf("Created directory '%s'.\n", dotsshdir); | |
781 | } | |
782 | /* If the file already exists, ask the user to confirm. */ | |
783 | if (stat(identity_file, &st) >= 0) { | |
784 | char yesno[3]; | |
785 | printf("%s already exists.\n", identity_file); | |
786 | printf("Overwrite (y/n)? "); | |
787 | fflush(stdout); | |
788 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
789 | exit(1); | |
790 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
791 | exit(1); | |
792 | } | |
793 | /* Ask for a passphrase (twice). */ | |
794 | if (identity_passphrase) | |
795 | passphrase1 = xstrdup(identity_passphrase); | |
796 | else if (identity_new_passphrase) | |
797 | passphrase1 = xstrdup(identity_new_passphrase); | |
798 | else { | |
799 | passphrase_again: | |
800 | passphrase1 = | |
801 | read_passphrase("Enter passphrase (empty for no passphrase): ", 1); | |
802 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
803 | if (strcmp(passphrase1, passphrase2) != 0) { | |
804 | /* The passphrases do not match. Clear them and retry. */ | |
805 | memset(passphrase1, 0, strlen(passphrase1)); | |
806 | memset(passphrase2, 0, strlen(passphrase2)); | |
807 | xfree(passphrase1); | |
808 | xfree(passphrase2); | |
809 | printf("Passphrases do not match. Try again.\n"); | |
810 | goto passphrase_again; | |
811 | } | |
812 | /* Clear the other copy of the passphrase. */ | |
813 | memset(passphrase2, 0, strlen(passphrase2)); | |
814 | xfree(passphrase2); | |
815 | } | |
816 | ||
5260325f | 817 | if (identity_comment) { |
818 | strlcpy(comment, identity_comment, sizeof(comment)); | |
819 | } else { | |
6ae2364d | 820 | /* Create default commend field for the passphrase. */ |
5260325f | 821 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
822 | } | |
823 | ||
824 | /* Save the key with the given passphrase and comment. */ | |
a306f2dd | 825 | if (!save_private_key(identity_file, passphrase1, private, comment)) { |
5260325f | 826 | printf("Saving the key failed: %s: %s.\n", |
a306f2dd | 827 | identity_file, strerror(errno)); |
5260325f | 828 | memset(passphrase1, 0, strlen(passphrase1)); |
829 | xfree(passphrase1); | |
830 | exit(1); | |
831 | } | |
832 | /* Clear the passphrase. */ | |
833 | memset(passphrase1, 0, strlen(passphrase1)); | |
834 | xfree(passphrase1); | |
835 | ||
836 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 837 | key_free(private); |
5260325f | 838 | arc4random_stir(); |
839 | ||
840 | if (!quiet) | |
841 | printf("Your identification has been saved in %s.\n", identity_file); | |
842 | ||
5260325f | 843 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 844 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
845 | if (fd == -1) { | |
5260325f | 846 | printf("Could not save your public key in %s\n", identity_file); |
847 | exit(1); | |
848 | } | |
1c9a907f | 849 | f = fdopen(fd, "w"); |
850 | if (f == NULL) { | |
851 | printf("fdopen %s failed", identity_file); | |
852 | exit(1); | |
853 | } | |
a306f2dd | 854 | if (!key_write(public, f)) |
855 | fprintf(stderr, "write key failed"); | |
856 | fprintf(f, " %s\n", comment); | |
5260325f | 857 | fclose(f); |
858 | ||
859 | if (!quiet) { | |
22138a36 | 860 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 861 | printf("Your public key has been saved in %s.\n", |
862 | identity_file); | |
5260325f | 863 | printf("The key fingerprint is:\n"); |
22138a36 | 864 | printf("%s %s\n", fp, comment); |
865 | xfree(fp); | |
8efc0c15 | 866 | } |
a306f2dd | 867 | |
868 | key_free(public); | |
5260325f | 869 | exit(0); |
8efc0c15 | 870 | } |