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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" | |
b705bea0 | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.42 2001/02/04 15:32:26 stevesk 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; | |
49 | ||
5ad13cd7 | 50 | /* The identity file name, given on the command line or entered by the user. */ |
51 | char identity_file[1024]; | |
52 | int have_identity = 0; | |
8efc0c15 | 53 | |
54 | /* This is set to the passphrase if given on the command line. */ | |
55 | char *identity_passphrase = NULL; | |
56 | ||
57 | /* This is set to the new passphrase if given on the command line. */ | |
58 | char *identity_new_passphrase = NULL; | |
59 | ||
60 | /* This is set to the new comment if given on the command line. */ | |
61 | char *identity_comment = NULL; | |
62 | ||
a306f2dd | 63 | /* Dump public key file in format used by real and the original SSH 2 */ |
64 | int convert_to_ssh2 = 0; | |
65 | int convert_from_ssh2 = 0; | |
66 | int print_public = 0; | |
fa08c86b | 67 | |
c523303b | 68 | /* default to RSA for SSH-1 */ |
69 | char *key_type_name = "rsa1"; | |
a306f2dd | 70 | |
5ad13cd7 | 71 | /* argv0 */ |
5260325f | 72 | #ifdef HAVE___PROGNAME |
5ad13cd7 | 73 | extern char *__progname; |
260d427b | 74 | #else |
75 | char *__progname; | |
76 | #endif | |
8efc0c15 | 77 | |
a306f2dd | 78 | char hostname[MAXHOSTNAMELEN]; |
79 | ||
5ad13cd7 | 80 | void |
81 | ask_filename(struct passwd *pw, const char *prompt) | |
8efc0c15 | 82 | { |
5260325f | 83 | char buf[1024]; |
c523303b | 84 | char *name = NULL; |
85 | ||
86 | switch (key_type_from_name(key_type_name)) { | |
87 | case KEY_RSA1: | |
42f11eb2 | 88 | name = _PATH_SSH_CLIENT_IDENTITY; |
c523303b | 89 | break; |
90 | case KEY_DSA: | |
42f11eb2 | 91 | name = _PATH_SSH_CLIENT_ID_DSA; |
c523303b | 92 | break; |
93 | case KEY_RSA: | |
42f11eb2 | 94 | name = _PATH_SSH_CLIENT_ID_RSA; |
c523303b | 95 | break; |
96 | default: | |
97 | fprintf(stderr, "bad key type"); | |
98 | exit(1); | |
99 | break; | |
100 | } | |
101 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); | |
8d88011e | 102 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
103 | fflush(stderr); | |
5260325f | 104 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
105 | exit(1); | |
106 | if (strchr(buf, '\n')) | |
107 | *strchr(buf, '\n') = 0; | |
108 | if (strcmp(buf, "") != 0) | |
109 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
110 | have_identity = 1; | |
f095fcc7 | 111 | } |
8efc0c15 | 112 | |
a306f2dd | 113 | int |
114 | try_load_key(char *filename, Key *k) | |
115 | { | |
116 | int success = 1; | |
117 | if (!load_private_key(filename, "", k, NULL)) { | |
118 | char *pass = read_passphrase("Enter passphrase: ", 1); | |
119 | if (!load_private_key(filename, pass, k, NULL)) { | |
120 | success = 0; | |
121 | } | |
122 | memset(pass, 0, strlen(pass)); | |
123 | xfree(pass); | |
124 | } | |
125 | return success; | |
126 | } | |
127 | ||
94ec8c6b | 128 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
129 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" | |
130 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" | |
2b87da3b | 131 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 132 | |
133 | void | |
134 | do_convert_to_ssh2(struct passwd *pw) | |
135 | { | |
136 | Key *k; | |
137 | int len; | |
1e3b8b07 | 138 | u_char *blob; |
a306f2dd | 139 | struct stat st; |
140 | ||
141 | if (!have_identity) | |
142 | ask_filename(pw, "Enter file in which the key is"); | |
143 | if (stat(identity_file, &st) < 0) { | |
144 | perror(identity_file); | |
145 | exit(1); | |
146 | } | |
fa08c86b | 147 | k = key_new(KEY_UNSPEC); |
a306f2dd | 148 | if (!try_load_key(identity_file, k)) { |
149 | fprintf(stderr, "load failed\n"); | |
150 | exit(1); | |
151 | } | |
fa08c86b | 152 | key_to_blob(k, &blob, &len); |
94ec8c6b | 153 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 154 | fprintf(stdout, |
94ec8c6b | 155 | "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
156 | key_size(k), key_type(k), | |
a306f2dd | 157 | pw->pw_name, hostname); |
158 | dump_base64(stdout, blob, len); | |
94ec8c6b | 159 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
a306f2dd | 160 | key_free(k); |
161 | xfree(blob); | |
162 | exit(0); | |
163 | } | |
164 | ||
94ec8c6b | 165 | void |
166 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) | |
167 | { | |
168 | int bits = buffer_get_int(b); | |
169 | int bytes = (bits + 7) / 8; | |
170 | if (buffer_len(b) < bytes) | |
171 | fatal("buffer_get_bignum_bits: input buffer too small"); | |
1e3b8b07 | 172 | BN_bin2bn((u_char *)buffer_ptr(b), bytes, value); |
94ec8c6b | 173 | buffer_consume(b, bytes); |
174 | } | |
175 | ||
176 | Key * | |
177 | do_convert_private_ssh2_from_blob(char *blob, int blen) | |
178 | { | |
179 | Buffer b; | |
180 | DSA *dsa; | |
181 | Key *key = NULL; | |
182 | int ignore, magic, rlen; | |
183 | char *type, *cipher; | |
184 | ||
185 | buffer_init(&b); | |
186 | buffer_append(&b, blob, blen); | |
187 | ||
188 | magic = buffer_get_int(&b); | |
189 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
190 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
191 | buffer_free(&b); | |
192 | return NULL; | |
193 | } | |
194 | ignore = buffer_get_int(&b); | |
195 | type = buffer_get_string(&b, NULL); | |
196 | cipher = buffer_get_string(&b, NULL); | |
197 | ignore = buffer_get_int(&b); | |
198 | ignore = buffer_get_int(&b); | |
199 | ignore = buffer_get_int(&b); | |
200 | xfree(type); | |
201 | ||
202 | if (strcmp(cipher, "none") != 0) { | |
203 | error("unsupported cipher %s", cipher); | |
204 | xfree(cipher); | |
205 | buffer_free(&b); | |
206 | return NULL; | |
207 | } | |
208 | xfree(cipher); | |
209 | ||
210 | key = key_new(KEY_DSA); | |
211 | dsa = key->dsa; | |
212 | dsa->priv_key = BN_new(); | |
213 | if (dsa->priv_key == NULL) { | |
214 | error("alloc priv_key failed"); | |
215 | key_free(key); | |
216 | return NULL; | |
217 | } | |
218 | buffer_get_bignum_bits(&b, dsa->p); | |
219 | buffer_get_bignum_bits(&b, dsa->g); | |
220 | buffer_get_bignum_bits(&b, dsa->q); | |
221 | buffer_get_bignum_bits(&b, dsa->pub_key); | |
222 | buffer_get_bignum_bits(&b, dsa->priv_key); | |
223 | rlen = buffer_len(&b); | |
224 | if(rlen != 0) | |
225 | error("do_convert_private_ssh2_from_blob: remaining bytes in key blob %d", rlen); | |
226 | buffer_free(&b); | |
227 | return key; | |
228 | } | |
229 | ||
a306f2dd | 230 | void |
231 | do_convert_from_ssh2(struct passwd *pw) | |
232 | { | |
233 | Key *k; | |
234 | int blen; | |
235 | char line[1024], *p; | |
236 | char blob[8096]; | |
237 | char encoded[8096]; | |
238 | struct stat st; | |
94ec8c6b | 239 | int escaped = 0, private = 0, ok; |
a306f2dd | 240 | FILE *fp; |
241 | ||
242 | if (!have_identity) | |
243 | ask_filename(pw, "Enter file in which the key is"); | |
244 | if (stat(identity_file, &st) < 0) { | |
245 | perror(identity_file); | |
246 | exit(1); | |
247 | } | |
248 | fp = fopen(identity_file, "r"); | |
249 | if (fp == NULL) { | |
250 | perror(identity_file); | |
251 | exit(1); | |
252 | } | |
253 | encoded[0] = '\0'; | |
254 | while (fgets(line, sizeof(line), fp)) { | |
d0c832f3 | 255 | if (!(p = strchr(line, '\n'))) { |
256 | fprintf(stderr, "input line too long.\n"); | |
257 | exit(1); | |
258 | } | |
259 | if (p > line && p[-1] == '\\') | |
260 | escaped++; | |
a306f2dd | 261 | if (strncmp(line, "----", 4) == 0 || |
262 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 263 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
264 | private = 1; | |
a306f2dd | 265 | fprintf(stderr, "ignore: %s", line); |
266 | continue; | |
267 | } | |
d0c832f3 | 268 | if (escaped) { |
269 | escaped--; | |
270 | fprintf(stderr, "escaped: %s", line); | |
271 | continue; | |
a306f2dd | 272 | } |
273 | *p = '\0'; | |
274 | strlcat(encoded, line, sizeof(encoded)); | |
275 | } | |
1e3b8b07 | 276 | blen = uudecode(encoded, (u_char *)blob, sizeof(blob)); |
a306f2dd | 277 | if (blen < 0) { |
278 | fprintf(stderr, "uudecode failed.\n"); | |
279 | exit(1); | |
280 | } | |
94ec8c6b | 281 | k = private ? |
282 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 283 | key_from_blob(blob, blen); |
94ec8c6b | 284 | if (k == NULL) { |
285 | fprintf(stderr, "decode blob failed.\n"); | |
286 | exit(1); | |
287 | } | |
288 | ok = private ? | |
289 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
290 | key_write(k, stdout); | |
291 | if (!ok) { | |
292 | fprintf(stderr, "key write failed"); | |
293 | exit(1); | |
294 | } | |
a306f2dd | 295 | key_free(k); |
296 | fprintf(stdout, "\n"); | |
297 | fclose(fp); | |
298 | exit(0); | |
299 | } | |
300 | ||
301 | void | |
302 | do_print_public(struct passwd *pw) | |
303 | { | |
304 | Key *k; | |
a306f2dd | 305 | struct stat st; |
306 | ||
307 | if (!have_identity) | |
308 | ask_filename(pw, "Enter file in which the key is"); | |
309 | if (stat(identity_file, &st) < 0) { | |
310 | perror(identity_file); | |
311 | exit(1); | |
312 | } | |
fa08c86b | 313 | k = key_new(KEY_UNSPEC); |
a306f2dd | 314 | if (!try_load_key(identity_file, k)) { |
315 | fprintf(stderr, "load failed\n"); | |
316 | exit(1); | |
317 | } | |
a306f2dd | 318 | if (!key_write(k, stdout)) |
319 | fprintf(stderr, "key_write failed"); | |
320 | key_free(k); | |
a306f2dd | 321 | fprintf(stdout, "\n"); |
322 | exit(0); | |
323 | } | |
324 | ||
f095fcc7 | 325 | void |
326 | do_fingerprint(struct passwd *pw) | |
327 | { | |
2e73a022 | 328 | |
c8d54615 | 329 | FILE *f; |
a306f2dd | 330 | Key *public; |
c8d54615 | 331 | char *comment = NULL, *cp, *ep, line[16*1024]; |
fa08c86b | 332 | int i, skip = 0, num = 1, invalid = 1, success = 0; |
5260325f | 333 | struct stat st; |
334 | ||
335 | if (!have_identity) | |
336 | ask_filename(pw, "Enter file in which the key is"); | |
337 | if (stat(identity_file, &st) < 0) { | |
338 | perror(identity_file); | |
339 | exit(1); | |
340 | } | |
fa08c86b | 341 | public = key_new(KEY_RSA1); |
a306f2dd | 342 | if (load_public_key(identity_file, public, &comment)) { |
fa08c86b | 343 | success = 1; |
344 | } else { | |
345 | key_free(public); | |
346 | public = key_new(KEY_UNSPEC); | |
347 | if (try_load_public_key(identity_file, public, &comment)) | |
348 | success = 1; | |
349 | else | |
efcae5b1 | 350 | debug("try_load_public_key KEY_UNSPEC failed"); |
fa08c86b | 351 | } |
352 | if (success) { | |
353 | printf("%d %s %s\n", key_size(public), key_fingerprint(public), comment); | |
a306f2dd | 354 | key_free(public); |
fa08c86b | 355 | xfree(comment); |
c8d54615 | 356 | exit(0); |
357 | } | |
c8d54615 | 358 | |
359 | f = fopen(identity_file, "r"); | |
360 | if (f != NULL) { | |
c8d54615 | 361 | while (fgets(line, sizeof(line), f)) { |
362 | i = strlen(line) - 1; | |
363 | if (line[i] != '\n') { | |
364 | error("line %d too long: %.40s...", num, line); | |
365 | skip = 1; | |
366 | continue; | |
367 | } | |
368 | num++; | |
369 | if (skip) { | |
370 | skip = 0; | |
371 | continue; | |
372 | } | |
373 | line[i] = '\0'; | |
374 | ||
375 | /* Skip leading whitespace, empty and comment lines. */ | |
376 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
377 | ; | |
378 | if (!*cp || *cp == '\n' || *cp == '#') | |
379 | continue ; | |
380 | i = strtol(cp, &ep, 10); | |
381 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
382 | int quoted = 0; | |
383 | comment = cp; | |
384 | for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { | |
385 | if (*cp == '\\' && cp[1] == '"') | |
386 | cp++; /* Skip both */ | |
387 | else if (*cp == '"') | |
388 | quoted = !quoted; | |
389 | } | |
390 | if (!*cp) | |
391 | continue; | |
392 | *cp++ = '\0'; | |
393 | } | |
394 | ep = cp; | |
efcae5b1 | 395 | public = key_new(KEY_RSA1); |
396 | if (key_read(public, &cp) != 1) { | |
397 | cp = ep; | |
398 | key_free(public); | |
399 | public = key_new(KEY_UNSPEC); | |
400 | if (key_read(public, &cp) != 1) { | |
401 | key_free(public); | |
402 | continue; | |
403 | } | |
5260325f | 404 | } |
efcae5b1 | 405 | comment = *cp ? cp : comment; |
406 | printf("%d %s %s\n", key_size(public), | |
407 | key_fingerprint(public), | |
408 | comment ? comment : "no comment"); | |
409 | invalid = 0; | |
5260325f | 410 | } |
c8d54615 | 411 | fclose(f); |
412 | } | |
2e73a022 | 413 | key_free(public); |
c8d54615 | 414 | if (invalid) { |
415 | printf("%s is not a valid key file.\n", identity_file); | |
416 | exit(1); | |
5260325f | 417 | } |
5260325f | 418 | exit(0); |
f095fcc7 | 419 | } |
420 | ||
5260325f | 421 | /* |
422 | * Perform changing a passphrase. The argument is the passwd structure | |
423 | * for the current user. | |
424 | */ | |
f095fcc7 | 425 | void |
426 | do_change_passphrase(struct passwd *pw) | |
427 | { | |
5260325f | 428 | char *comment; |
429 | char *old_passphrase, *passphrase1, *passphrase2; | |
430 | struct stat st; | |
a306f2dd | 431 | Key *private; |
432 | Key *public; | |
fa08c86b | 433 | int type = KEY_RSA1; |
5260325f | 434 | |
435 | if (!have_identity) | |
436 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 437 | if (stat(identity_file, &st) < 0) { |
438 | perror(identity_file); | |
439 | exit(1); | |
440 | } | |
fa08c86b | 441 | public = key_new(type); |
442 | if (!load_public_key(identity_file, public, NULL)) { | |
443 | type = KEY_UNSPEC; | |
444 | } else { | |
a306f2dd | 445 | /* Clear the public key since we are just about to load the whole file. */ |
446 | key_free(public); | |
5260325f | 447 | } |
5260325f | 448 | /* Try to load the file with empty passphrase. */ |
a306f2dd | 449 | private = key_new(type); |
450 | if (!load_private_key(identity_file, "", private, &comment)) { | |
5260325f | 451 | if (identity_passphrase) |
452 | old_passphrase = xstrdup(identity_passphrase); | |
453 | else | |
454 | old_passphrase = read_passphrase("Enter old passphrase: ", 1); | |
a306f2dd | 455 | if (!load_private_key(identity_file, old_passphrase, private, &comment)) { |
5260325f | 456 | memset(old_passphrase, 0, strlen(old_passphrase)); |
457 | xfree(old_passphrase); | |
458 | printf("Bad passphrase.\n"); | |
459 | exit(1); | |
460 | } | |
5260325f | 461 | memset(old_passphrase, 0, strlen(old_passphrase)); |
462 | xfree(old_passphrase); | |
463 | } | |
464 | printf("Key has comment '%s'\n", comment); | |
465 | ||
466 | /* Ask the new passphrase (twice). */ | |
467 | if (identity_new_passphrase) { | |
468 | passphrase1 = xstrdup(identity_new_passphrase); | |
469 | passphrase2 = NULL; | |
470 | } else { | |
471 | passphrase1 = | |
472 | read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); | |
473 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
474 | ||
475 | /* Verify that they are the same. */ | |
476 | if (strcmp(passphrase1, passphrase2) != 0) { | |
477 | memset(passphrase1, 0, strlen(passphrase1)); | |
478 | memset(passphrase2, 0, strlen(passphrase2)); | |
479 | xfree(passphrase1); | |
480 | xfree(passphrase2); | |
481 | printf("Pass phrases do not match. Try again.\n"); | |
482 | exit(1); | |
483 | } | |
484 | /* Destroy the other copy. */ | |
485 | memset(passphrase2, 0, strlen(passphrase2)); | |
486 | xfree(passphrase2); | |
8efc0c15 | 487 | } |
8efc0c15 | 488 | |
5260325f | 489 | /* Save the file using the new passphrase. */ |
a306f2dd | 490 | if (!save_private_key(identity_file, passphrase1, private, comment)) { |
5260325f | 491 | printf("Saving the key failed: %s: %s.\n", |
492 | identity_file, strerror(errno)); | |
493 | memset(passphrase1, 0, strlen(passphrase1)); | |
494 | xfree(passphrase1); | |
a306f2dd | 495 | key_free(private); |
5260325f | 496 | xfree(comment); |
497 | exit(1); | |
498 | } | |
499 | /* Destroy the passphrase and the copy of the key in memory. */ | |
500 | memset(passphrase1, 0, strlen(passphrase1)); | |
501 | xfree(passphrase1); | |
a306f2dd | 502 | key_free(private); /* Destroys contents */ |
5260325f | 503 | xfree(comment); |
504 | ||
505 | printf("Your identification has been saved with the new passphrase.\n"); | |
506 | exit(0); | |
507 | } | |
8efc0c15 | 508 | |
5260325f | 509 | /* |
510 | * Change the comment of a private key file. | |
511 | */ | |
8efc0c15 | 512 | void |
513 | do_change_comment(struct passwd *pw) | |
514 | { | |
5260325f | 515 | char new_comment[1024], *comment; |
a306f2dd | 516 | Key *private; |
517 | Key *public; | |
5260325f | 518 | char *passphrase; |
519 | struct stat st; | |
520 | FILE *f; | |
5260325f | 521 | |
522 | if (!have_identity) | |
523 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 524 | if (stat(identity_file, &st) < 0) { |
525 | perror(identity_file); | |
526 | exit(1); | |
527 | } | |
aa3378df | 528 | /* |
529 | * Try to load the public key from the file the verify that it is | |
530 | * readable and of the proper format. | |
531 | */ | |
fa08c86b | 532 | public = key_new(KEY_RSA1); |
a306f2dd | 533 | if (!load_public_key(identity_file, public, NULL)) { |
5260325f | 534 | printf("%s is not a valid key file.\n", identity_file); |
535 | exit(1); | |
8efc0c15 | 536 | } |
aa3378df | 537 | |
fa08c86b | 538 | private = key_new(KEY_RSA1); |
a306f2dd | 539 | if (load_private_key(identity_file, "", private, &comment)) |
5260325f | 540 | passphrase = xstrdup(""); |
541 | else { | |
5260325f | 542 | if (identity_passphrase) |
543 | passphrase = xstrdup(identity_passphrase); | |
544 | else if (identity_new_passphrase) | |
545 | passphrase = xstrdup(identity_new_passphrase); | |
546 | else | |
547 | passphrase = read_passphrase("Enter passphrase: ", 1); | |
548 | /* Try to load using the passphrase. */ | |
a306f2dd | 549 | if (!load_private_key(identity_file, passphrase, private, &comment)) { |
5260325f | 550 | memset(passphrase, 0, strlen(passphrase)); |
551 | xfree(passphrase); | |
552 | printf("Bad passphrase.\n"); | |
553 | exit(1); | |
554 | } | |
555 | } | |
556 | printf("Key now has comment '%s'\n", comment); | |
557 | ||
558 | if (identity_comment) { | |
559 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
560 | } else { | |
561 | printf("Enter new comment: "); | |
562 | fflush(stdout); | |
563 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
564 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 565 | key_free(private); |
5260325f | 566 | exit(1); |
567 | } | |
5260325f | 568 | if (strchr(new_comment, '\n')) |
569 | *strchr(new_comment, '\n') = 0; | |
570 | } | |
571 | ||
572 | /* Save the file using the new passphrase. */ | |
a306f2dd | 573 | if (!save_private_key(identity_file, passphrase, private, new_comment)) { |
5260325f | 574 | printf("Saving the key failed: %s: %s.\n", |
575 | identity_file, strerror(errno)); | |
576 | memset(passphrase, 0, strlen(passphrase)); | |
577 | xfree(passphrase); | |
a306f2dd | 578 | key_free(private); |
5260325f | 579 | xfree(comment); |
580 | exit(1); | |
8efc0c15 | 581 | } |
5260325f | 582 | memset(passphrase, 0, strlen(passphrase)); |
583 | xfree(passphrase); | |
a306f2dd | 584 | key_free(private); |
5260325f | 585 | |
5260325f | 586 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
587 | f = fopen(identity_file, "w"); | |
588 | if (!f) { | |
589 | printf("Could not save your public key in %s\n", identity_file); | |
590 | exit(1); | |
591 | } | |
a306f2dd | 592 | if (!key_write(public, f)) |
593 | fprintf(stderr, "write key failed"); | |
594 | key_free(public); | |
595 | fprintf(f, " %s\n", new_comment); | |
5260325f | 596 | fclose(f); |
597 | ||
598 | xfree(comment); | |
599 | ||
600 | printf("The comment in your key file has been changed.\n"); | |
601 | exit(0); | |
8efc0c15 | 602 | } |
603 | ||
5ad13cd7 | 604 | void |
605 | usage(void) | |
606 | { | |
fa08c86b | 607 | printf("Usage: %s [-lpqxXyc] [-t type] [-b bits] [-f file] [-C comment] [-N new-pass] [-P pass]\n", __progname); |
5260325f | 608 | exit(1); |
5ad13cd7 | 609 | } |
610 | ||
5260325f | 611 | /* |
612 | * Main program for key management. | |
613 | */ | |
8efc0c15 | 614 | int |
615 | main(int ac, char **av) | |
616 | { | |
5260325f | 617 | char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
618 | struct passwd *pw; | |
c523303b | 619 | int opt, type; |
5260325f | 620 | struct stat st; |
621 | FILE *f; | |
a306f2dd | 622 | Key *private; |
623 | Key *public; | |
fa08c86b | 624 | |
5260325f | 625 | extern int optind; |
626 | extern char *optarg; | |
627 | ||
260d427b | 628 | __progname = get_progname(av[0]); |
264dce47 | 629 | init_rng(); |
630 | ||
fa649821 | 631 | SSLeay_add_all_algorithms(); |
a306f2dd | 632 | |
aa3378df | 633 | /* we need this for the home * directory. */ |
5260325f | 634 | pw = getpwuid(getuid()); |
635 | if (!pw) { | |
636 | printf("You don't exist, go away!\n"); | |
637 | exit(1); | |
638 | } | |
a306f2dd | 639 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
640 | perror("gethostname"); | |
641 | exit(1); | |
642 | } | |
aa3378df | 643 | |
b5c334cc | 644 | while ((opt = getopt(ac, av, "dqpclRxXyb:f:t:P:N:C:")) != -1) { |
5260325f | 645 | switch (opt) { |
646 | case 'b': | |
647 | bits = atoi(optarg); | |
648 | if (bits < 512 || bits > 32768) { | |
649 | printf("Bits has bad value.\n"); | |
650 | exit(1); | |
651 | } | |
652 | break; | |
653 | ||
654 | case 'l': | |
655 | print_fingerprint = 1; | |
656 | break; | |
657 | ||
658 | case 'p': | |
659 | change_passphrase = 1; | |
660 | break; | |
661 | ||
662 | case 'c': | |
663 | change_comment = 1; | |
664 | break; | |
665 | ||
666 | case 'f': | |
667 | strlcpy(identity_file, optarg, sizeof(identity_file)); | |
668 | have_identity = 1; | |
669 | break; | |
670 | ||
671 | case 'P': | |
672 | identity_passphrase = optarg; | |
673 | break; | |
674 | ||
675 | case 'N': | |
676 | identity_new_passphrase = optarg; | |
677 | break; | |
678 | ||
679 | case 'C': | |
680 | identity_comment = optarg; | |
681 | break; | |
682 | ||
683 | case 'q': | |
684 | quiet = 1; | |
685 | break; | |
686 | ||
a306f2dd | 687 | case 'R': |
fa08c86b | 688 | /* unused */ |
689 | exit(0); | |
a306f2dd | 690 | break; |
691 | ||
692 | case 'x': | |
693 | convert_to_ssh2 = 1; | |
694 | break; | |
695 | ||
696 | case 'X': | |
697 | convert_from_ssh2 = 1; | |
698 | break; | |
699 | ||
700 | case 'y': | |
701 | print_public = 1; | |
702 | break; | |
703 | ||
704 | case 'd': | |
fa08c86b | 705 | key_type_name = "dsa"; |
a306f2dd | 706 | break; |
707 | ||
fa08c86b | 708 | case 't': |
709 | key_type_name = optarg; | |
fa08c86b | 710 | break; |
711 | ||
5260325f | 712 | case '?': |
713 | default: | |
714 | usage(); | |
715 | } | |
716 | } | |
717 | if (optind < ac) { | |
718 | printf("Too many arguments.\n"); | |
719 | usage(); | |
720 | } | |
721 | if (change_passphrase && change_comment) { | |
722 | printf("Can only have one of -p and -c.\n"); | |
723 | usage(); | |
724 | } | |
725 | if (print_fingerprint) | |
726 | do_fingerprint(pw); | |
5260325f | 727 | if (change_passphrase) |
728 | do_change_passphrase(pw); | |
5260325f | 729 | if (change_comment) |
730 | do_change_comment(pw); | |
a306f2dd | 731 | if (convert_to_ssh2) |
732 | do_convert_to_ssh2(pw); | |
733 | if (convert_from_ssh2) | |
734 | do_convert_from_ssh2(pw); | |
735 | if (print_public) | |
736 | do_print_public(pw); | |
5260325f | 737 | |
738 | arc4random_stir(); | |
739 | ||
c523303b | 740 | type = key_type_from_name(key_type_name); |
741 | if (type == KEY_UNSPEC) { | |
742 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
743 | exit(1); | |
a306f2dd | 744 | } |
fa08c86b | 745 | if (!quiet) |
c523303b | 746 | printf("Generating public/private %s key pair.\n", key_type_name); |
fa08c86b | 747 | private = key_generate(type, bits); |
748 | if (private == NULL) { | |
749 | fprintf(stderr, "key_generate failed"); | |
750 | exit(1); | |
751 | } | |
752 | public = key_from_private(private); | |
5260325f | 753 | |
754 | if (!have_identity) | |
755 | ask_filename(pw, "Enter file in which to save the key"); | |
756 | ||
757 | /* Create ~/.ssh directory if it doesn\'t already exist. */ | |
42f11eb2 | 758 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 759 | if (strstr(identity_file, dotsshdir) != NULL && |
760 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 761 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 762 | error("Could not create directory '%s'.", dotsshdir); |
763 | else if (!quiet) | |
764 | printf("Created directory '%s'.\n", dotsshdir); | |
765 | } | |
766 | /* If the file already exists, ask the user to confirm. */ | |
767 | if (stat(identity_file, &st) >= 0) { | |
768 | char yesno[3]; | |
769 | printf("%s already exists.\n", identity_file); | |
770 | printf("Overwrite (y/n)? "); | |
771 | fflush(stdout); | |
772 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
773 | exit(1); | |
774 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
775 | exit(1); | |
776 | } | |
777 | /* Ask for a passphrase (twice). */ | |
778 | if (identity_passphrase) | |
779 | passphrase1 = xstrdup(identity_passphrase); | |
780 | else if (identity_new_passphrase) | |
781 | passphrase1 = xstrdup(identity_new_passphrase); | |
782 | else { | |
783 | passphrase_again: | |
784 | passphrase1 = | |
785 | read_passphrase("Enter passphrase (empty for no passphrase): ", 1); | |
786 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
787 | if (strcmp(passphrase1, passphrase2) != 0) { | |
788 | /* The passphrases do not match. Clear them and retry. */ | |
789 | memset(passphrase1, 0, strlen(passphrase1)); | |
790 | memset(passphrase2, 0, strlen(passphrase2)); | |
791 | xfree(passphrase1); | |
792 | xfree(passphrase2); | |
793 | printf("Passphrases do not match. Try again.\n"); | |
794 | goto passphrase_again; | |
795 | } | |
796 | /* Clear the other copy of the passphrase. */ | |
797 | memset(passphrase2, 0, strlen(passphrase2)); | |
798 | xfree(passphrase2); | |
799 | } | |
800 | ||
5260325f | 801 | if (identity_comment) { |
802 | strlcpy(comment, identity_comment, sizeof(comment)); | |
803 | } else { | |
6ae2364d | 804 | /* Create default commend field for the passphrase. */ |
5260325f | 805 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
806 | } | |
807 | ||
808 | /* Save the key with the given passphrase and comment. */ | |
a306f2dd | 809 | if (!save_private_key(identity_file, passphrase1, private, comment)) { |
5260325f | 810 | printf("Saving the key failed: %s: %s.\n", |
a306f2dd | 811 | identity_file, strerror(errno)); |
5260325f | 812 | memset(passphrase1, 0, strlen(passphrase1)); |
813 | xfree(passphrase1); | |
814 | exit(1); | |
815 | } | |
816 | /* Clear the passphrase. */ | |
817 | memset(passphrase1, 0, strlen(passphrase1)); | |
818 | xfree(passphrase1); | |
819 | ||
820 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 821 | key_free(private); |
5260325f | 822 | arc4random_stir(); |
823 | ||
824 | if (!quiet) | |
825 | printf("Your identification has been saved in %s.\n", identity_file); | |
826 | ||
5260325f | 827 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
828 | f = fopen(identity_file, "w"); | |
829 | if (!f) { | |
830 | printf("Could not save your public key in %s\n", identity_file); | |
831 | exit(1); | |
832 | } | |
a306f2dd | 833 | if (!key_write(public, f)) |
834 | fprintf(stderr, "write key failed"); | |
835 | fprintf(f, " %s\n", comment); | |
5260325f | 836 | fclose(f); |
837 | ||
838 | if (!quiet) { | |
a306f2dd | 839 | printf("Your public key has been saved in %s.\n", |
840 | identity_file); | |
5260325f | 841 | printf("The key fingerprint is:\n"); |
a306f2dd | 842 | printf("%s %s\n", key_fingerprint(public), comment); |
8efc0c15 | 843 | } |
a306f2dd | 844 | |
845 | key_free(public); | |
5260325f | 846 | exit(0); |
8efc0c15 | 847 | } |