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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" | |
aeaa3d9e | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.52 2001/03/26 08:07:09 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 | |
aeaa3d9e | 114 | Key * |
115 | try_load_pem_key(char *filename) | |
a306f2dd | 116 | { |
aeaa3d9e | 117 | char *pass; |
118 | Key *prv; | |
119 | ||
120 | prv = key_load_private(filename, "", NULL); | |
121 | if (prv == NULL) { | |
122 | pass = read_passphrase("Enter passphrase: ", 1); | |
123 | prv = key_load_private(filename, pass, NULL); | |
a306f2dd | 124 | memset(pass, 0, strlen(pass)); |
125 | xfree(pass); | |
126 | } | |
aeaa3d9e | 127 | return prv; |
a306f2dd | 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 ----" | |
2b87da3b | 133 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 134 | |
135 | void | |
136 | do_convert_to_ssh2(struct passwd *pw) | |
137 | { | |
aeaa3d9e | 138 | Key *prv; |
a306f2dd | 139 | int len; |
1e3b8b07 | 140 | u_char *blob; |
a306f2dd | 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 | } | |
aeaa3d9e | 149 | prv = try_load_pem_key(identity_file); |
150 | if (prv == NULL) { | |
a306f2dd | 151 | fprintf(stderr, "load failed\n"); |
152 | exit(1); | |
153 | } | |
aeaa3d9e | 154 | key_to_blob(prv, &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", |
aeaa3d9e | 158 | key_size(prv), key_type(prv), |
a306f2dd | 159 | pw->pw_name, hostname); |
160 | dump_base64(stdout, blob, len); | |
94ec8c6b | 161 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
aeaa3d9e | 162 | key_free(prv); |
a306f2dd | 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"); | |
1e3b8b07 | 174 | BN_bin2bn((u_char *)buffer_ptr(b), bytes, value); |
94ec8c6b | 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 | } | |
1e3b8b07 | 278 | blen = uudecode(encoded, (u_char *)blob, sizeof(blob)); |
a306f2dd | 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 | { | |
aeaa3d9e | 306 | Key *prv; |
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 | } | |
aeaa3d9e | 315 | prv = try_load_pem_key(identity_file); |
316 | if (prv == NULL) { | |
a306f2dd | 317 | fprintf(stderr, "load failed\n"); |
318 | exit(1); | |
319 | } | |
aeaa3d9e | 320 | if (!key_write(prv, stdout)) |
a306f2dd | 321 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 322 | key_free(prv); |
a306f2dd | 323 | fprintf(stdout, "\n"); |
324 | exit(0); | |
325 | } | |
326 | ||
f095fcc7 | 327 | void |
328 | do_fingerprint(struct passwd *pw) | |
329 | { | |
c8d54615 | 330 | FILE *f; |
a306f2dd | 331 | Key *public; |
aaf45d87 | 332 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
aeaa3d9e | 333 | int i, skip = 0, num = 1, invalid = 1, rep, fptype; |
5260325f | 334 | struct stat st; |
335 | ||
aeaa3d9e | 336 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
337 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 338 | |
5260325f | 339 | if (!have_identity) |
340 | ask_filename(pw, "Enter file in which the key is"); | |
341 | if (stat(identity_file, &st) < 0) { | |
342 | perror(identity_file); | |
343 | exit(1); | |
344 | } | |
aeaa3d9e | 345 | public = key_load_public(identity_file, &comment); |
346 | if (public != NULL) { | |
347 | fp = key_fingerprint(public, fptype, rep); | |
348 | printf("%d %s %s\n", key_size(public), fp, comment); | |
a306f2dd | 349 | key_free(public); |
fa08c86b | 350 | xfree(comment); |
aaf45d87 | 351 | xfree(fp); |
c8d54615 | 352 | exit(0); |
353 | } | |
aeaa3d9e | 354 | if (comment) |
355 | xfree(comment); | |
c8d54615 | 356 | |
357 | f = fopen(identity_file, "r"); | |
358 | if (f != NULL) { | |
c8d54615 | 359 | while (fgets(line, sizeof(line), f)) { |
360 | i = strlen(line) - 1; | |
361 | if (line[i] != '\n') { | |
362 | error("line %d too long: %.40s...", num, line); | |
363 | skip = 1; | |
364 | continue; | |
365 | } | |
366 | num++; | |
367 | if (skip) { | |
368 | skip = 0; | |
369 | continue; | |
370 | } | |
371 | line[i] = '\0'; | |
372 | ||
373 | /* Skip leading whitespace, empty and comment lines. */ | |
374 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
375 | ; | |
376 | if (!*cp || *cp == '\n' || *cp == '#') | |
377 | continue ; | |
378 | i = strtol(cp, &ep, 10); | |
379 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
380 | int quoted = 0; | |
381 | comment = cp; | |
382 | for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { | |
383 | if (*cp == '\\' && cp[1] == '"') | |
384 | cp++; /* Skip both */ | |
385 | else if (*cp == '"') | |
386 | quoted = !quoted; | |
387 | } | |
388 | if (!*cp) | |
389 | continue; | |
390 | *cp++ = '\0'; | |
391 | } | |
392 | ep = cp; | |
efcae5b1 | 393 | public = key_new(KEY_RSA1); |
394 | if (key_read(public, &cp) != 1) { | |
395 | cp = ep; | |
396 | key_free(public); | |
397 | public = key_new(KEY_UNSPEC); | |
398 | if (key_read(public, &cp) != 1) { | |
399 | key_free(public); | |
400 | continue; | |
401 | } | |
5260325f | 402 | } |
efcae5b1 | 403 | comment = *cp ? cp : comment; |
aeaa3d9e | 404 | fp = key_fingerprint(public, fptype, rep); |
aaf45d87 | 405 | printf("%d %s %s\n", key_size(public), fp, |
efcae5b1 | 406 | comment ? comment : "no comment"); |
aaf45d87 | 407 | xfree(fp); |
aeaa3d9e | 408 | key_free(public); |
efcae5b1 | 409 | invalid = 0; |
5260325f | 410 | } |
c8d54615 | 411 | fclose(f); |
412 | } | |
413 | if (invalid) { | |
414 | printf("%s is not a valid key file.\n", identity_file); | |
415 | exit(1); | |
5260325f | 416 | } |
5260325f | 417 | exit(0); |
f095fcc7 | 418 | } |
419 | ||
5260325f | 420 | /* |
421 | * Perform changing a passphrase. The argument is the passwd structure | |
422 | * for the current user. | |
423 | */ | |
f095fcc7 | 424 | void |
425 | do_change_passphrase(struct passwd *pw) | |
426 | { | |
5260325f | 427 | char *comment; |
428 | char *old_passphrase, *passphrase1, *passphrase2; | |
429 | struct stat st; | |
a306f2dd | 430 | Key *private; |
5260325f | 431 | |
432 | if (!have_identity) | |
433 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 434 | if (stat(identity_file, &st) < 0) { |
435 | perror(identity_file); | |
436 | exit(1); | |
437 | } | |
5260325f | 438 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 439 | private = key_load_private(identity_file, "", &comment); |
440 | if (private == NULL) { | |
5260325f | 441 | if (identity_passphrase) |
442 | old_passphrase = xstrdup(identity_passphrase); | |
443 | else | |
444 | old_passphrase = read_passphrase("Enter old passphrase: ", 1); | |
aeaa3d9e | 445 | private = key_load_private(identity_file, old_passphrase , &comment); |
446 | memset(old_passphrase, 0, strlen(old_passphrase)); | |
447 | xfree(old_passphrase); | |
448 | if (private == NULL) { | |
5260325f | 449 | printf("Bad passphrase.\n"); |
450 | exit(1); | |
451 | } | |
5260325f | 452 | } |
453 | printf("Key has comment '%s'\n", comment); | |
454 | ||
455 | /* Ask the new passphrase (twice). */ | |
456 | if (identity_new_passphrase) { | |
457 | passphrase1 = xstrdup(identity_new_passphrase); | |
458 | passphrase2 = NULL; | |
459 | } else { | |
460 | passphrase1 = | |
461 | read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); | |
462 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
463 | ||
464 | /* Verify that they are the same. */ | |
465 | if (strcmp(passphrase1, passphrase2) != 0) { | |
466 | memset(passphrase1, 0, strlen(passphrase1)); | |
467 | memset(passphrase2, 0, strlen(passphrase2)); | |
468 | xfree(passphrase1); | |
469 | xfree(passphrase2); | |
470 | printf("Pass phrases do not match. Try again.\n"); | |
471 | exit(1); | |
472 | } | |
473 | /* Destroy the other copy. */ | |
474 | memset(passphrase2, 0, strlen(passphrase2)); | |
475 | xfree(passphrase2); | |
8efc0c15 | 476 | } |
8efc0c15 | 477 | |
5260325f | 478 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 479 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
5260325f | 480 | printf("Saving the key failed: %s: %s.\n", |
481 | identity_file, strerror(errno)); | |
482 | memset(passphrase1, 0, strlen(passphrase1)); | |
483 | xfree(passphrase1); | |
a306f2dd | 484 | key_free(private); |
5260325f | 485 | xfree(comment); |
486 | exit(1); | |
487 | } | |
488 | /* Destroy the passphrase and the copy of the key in memory. */ | |
489 | memset(passphrase1, 0, strlen(passphrase1)); | |
490 | xfree(passphrase1); | |
a306f2dd | 491 | key_free(private); /* Destroys contents */ |
5260325f | 492 | xfree(comment); |
493 | ||
494 | printf("Your identification has been saved with the new passphrase.\n"); | |
495 | exit(0); | |
496 | } | |
8efc0c15 | 497 | |
5260325f | 498 | /* |
499 | * Change the comment of a private key file. | |
500 | */ | |
8efc0c15 | 501 | void |
502 | do_change_comment(struct passwd *pw) | |
503 | { | |
1c9a907f | 504 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 505 | Key *private; |
506 | Key *public; | |
5260325f | 507 | struct stat st; |
508 | FILE *f; | |
1c9a907f | 509 | int fd; |
5260325f | 510 | |
511 | if (!have_identity) | |
512 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 513 | if (stat(identity_file, &st) < 0) { |
514 | perror(identity_file); | |
515 | exit(1); | |
516 | } | |
aeaa3d9e | 517 | private = key_load_private(identity_file, "", &comment); |
518 | if (private == NULL) { | |
5260325f | 519 | if (identity_passphrase) |
520 | passphrase = xstrdup(identity_passphrase); | |
521 | else if (identity_new_passphrase) | |
522 | passphrase = xstrdup(identity_new_passphrase); | |
523 | else | |
524 | passphrase = read_passphrase("Enter passphrase: ", 1); | |
525 | /* Try to load using the passphrase. */ | |
aeaa3d9e | 526 | private = key_load_private(identity_file, passphrase, &comment); |
527 | if (private == NULL) { | |
5260325f | 528 | memset(passphrase, 0, strlen(passphrase)); |
529 | xfree(passphrase); | |
530 | printf("Bad passphrase.\n"); | |
531 | exit(1); | |
532 | } | |
aeaa3d9e | 533 | } else { |
534 | passphrase = xstrdup(""); | |
5260325f | 535 | } |
aeaa3d9e | 536 | if (private->type != KEY_RSA1) { |
537 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
538 | key_free(private); | |
539 | exit(1); | |
540 | } | |
5260325f | 541 | printf("Key now has comment '%s'\n", comment); |
542 | ||
543 | if (identity_comment) { | |
544 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
545 | } else { | |
546 | printf("Enter new comment: "); | |
547 | fflush(stdout); | |
548 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
549 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 550 | key_free(private); |
5260325f | 551 | exit(1); |
552 | } | |
5260325f | 553 | if (strchr(new_comment, '\n')) |
554 | *strchr(new_comment, '\n') = 0; | |
555 | } | |
556 | ||
557 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 558 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
5260325f | 559 | printf("Saving the key failed: %s: %s.\n", |
560 | identity_file, strerror(errno)); | |
561 | memset(passphrase, 0, strlen(passphrase)); | |
562 | xfree(passphrase); | |
a306f2dd | 563 | key_free(private); |
5260325f | 564 | xfree(comment); |
565 | exit(1); | |
8efc0c15 | 566 | } |
5260325f | 567 | memset(passphrase, 0, strlen(passphrase)); |
568 | xfree(passphrase); | |
aeaa3d9e | 569 | public = key_from_private(private); |
a306f2dd | 570 | key_free(private); |
5260325f | 571 | |
5260325f | 572 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 573 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
574 | if (fd == -1) { | |
5260325f | 575 | printf("Could not save your public key in %s\n", identity_file); |
576 | exit(1); | |
577 | } | |
1c9a907f | 578 | f = fdopen(fd, "w"); |
579 | if (f == NULL) { | |
580 | printf("fdopen %s failed", identity_file); | |
581 | exit(1); | |
582 | } | |
a306f2dd | 583 | if (!key_write(public, f)) |
584 | fprintf(stderr, "write key failed"); | |
585 | key_free(public); | |
586 | fprintf(f, " %s\n", new_comment); | |
5260325f | 587 | fclose(f); |
588 | ||
589 | xfree(comment); | |
590 | ||
591 | printf("The comment in your key file has been changed.\n"); | |
592 | exit(0); | |
8efc0c15 | 593 | } |
594 | ||
5ad13cd7 | 595 | void |
596 | usage(void) | |
597 | { | |
5e7cb456 | 598 | printf("Usage: %s [-lBpqxXyc] [-t type] [-b bits] [-f file] [-C comment] " |
ed2166d8 | 599 | "[-N new-pass] [-P pass]\n", __progname); |
5260325f | 600 | exit(1); |
5ad13cd7 | 601 | } |
602 | ||
5260325f | 603 | /* |
604 | * Main program for key management. | |
605 | */ | |
8efc0c15 | 606 | int |
607 | main(int ac, char **av) | |
608 | { | |
5260325f | 609 | char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
1c9a907f | 610 | Key *private, *public; |
5260325f | 611 | struct passwd *pw; |
1c9a907f | 612 | int opt, type, fd; |
5260325f | 613 | struct stat st; |
614 | FILE *f; | |
fa08c86b | 615 | |
5260325f | 616 | extern int optind; |
617 | extern char *optarg; | |
618 | ||
260d427b | 619 | __progname = get_progname(av[0]); |
264dce47 | 620 | init_rng(); |
e339aa53 | 621 | seed_rng(); |
264dce47 | 622 | |
fa649821 | 623 | SSLeay_add_all_algorithms(); |
a306f2dd | 624 | |
aa3378df | 625 | /* we need this for the home * directory. */ |
5260325f | 626 | pw = getpwuid(getuid()); |
627 | if (!pw) { | |
628 | printf("You don't exist, go away!\n"); | |
629 | exit(1); | |
630 | } | |
a306f2dd | 631 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
632 | perror("gethostname"); | |
633 | exit(1); | |
634 | } | |
aa3378df | 635 | |
aaf45d87 | 636 | while ((opt = getopt(ac, av, "dqpclBRxXyb:f:t:P:N:C:")) != -1) { |
5260325f | 637 | switch (opt) { |
638 | case 'b': | |
639 | bits = atoi(optarg); | |
640 | if (bits < 512 || bits > 32768) { | |
641 | printf("Bits has bad value.\n"); | |
642 | exit(1); | |
643 | } | |
644 | break; | |
645 | ||
646 | case 'l': | |
647 | print_fingerprint = 1; | |
648 | break; | |
649 | ||
aaf45d87 | 650 | case 'B': |
651 | print_bubblebabble = 1; | |
652 | break; | |
653 | ||
5260325f | 654 | case 'p': |
655 | change_passphrase = 1; | |
656 | break; | |
657 | ||
658 | case 'c': | |
659 | change_comment = 1; | |
660 | break; | |
661 | ||
662 | case 'f': | |
663 | strlcpy(identity_file, optarg, sizeof(identity_file)); | |
664 | have_identity = 1; | |
665 | break; | |
666 | ||
667 | case 'P': | |
668 | identity_passphrase = optarg; | |
669 | break; | |
670 | ||
671 | case 'N': | |
672 | identity_new_passphrase = optarg; | |
673 | break; | |
674 | ||
675 | case 'C': | |
676 | identity_comment = optarg; | |
677 | break; | |
678 | ||
679 | case 'q': | |
680 | quiet = 1; | |
681 | break; | |
682 | ||
a306f2dd | 683 | case 'R': |
fa08c86b | 684 | /* unused */ |
685 | exit(0); | |
a306f2dd | 686 | break; |
687 | ||
688 | case 'x': | |
689 | convert_to_ssh2 = 1; | |
690 | break; | |
691 | ||
692 | case 'X': | |
693 | convert_from_ssh2 = 1; | |
694 | break; | |
695 | ||
696 | case 'y': | |
697 | print_public = 1; | |
698 | break; | |
954f0550 | 699 | |
a306f2dd | 700 | case 'd': |
fa08c86b | 701 | key_type_name = "dsa"; |
a306f2dd | 702 | break; |
703 | ||
fa08c86b | 704 | case 't': |
705 | key_type_name = optarg; | |
fa08c86b | 706 | break; |
707 | ||
5260325f | 708 | case '?': |
709 | default: | |
710 | usage(); | |
711 | } | |
712 | } | |
713 | if (optind < ac) { | |
714 | printf("Too many arguments.\n"); | |
715 | usage(); | |
716 | } | |
717 | if (change_passphrase && change_comment) { | |
718 | printf("Can only have one of -p and -c.\n"); | |
719 | usage(); | |
720 | } | |
aaf45d87 | 721 | if (print_fingerprint || print_bubblebabble) |
5260325f | 722 | do_fingerprint(pw); |
5260325f | 723 | if (change_passphrase) |
724 | do_change_passphrase(pw); | |
5260325f | 725 | if (change_comment) |
726 | do_change_comment(pw); | |
a306f2dd | 727 | if (convert_to_ssh2) |
728 | do_convert_to_ssh2(pw); | |
729 | if (convert_from_ssh2) | |
730 | do_convert_from_ssh2(pw); | |
731 | if (print_public) | |
732 | do_print_public(pw); | |
5260325f | 733 | |
734 | arc4random_stir(); | |
735 | ||
c523303b | 736 | type = key_type_from_name(key_type_name); |
737 | if (type == KEY_UNSPEC) { | |
738 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
739 | exit(1); | |
a306f2dd | 740 | } |
fa08c86b | 741 | if (!quiet) |
c523303b | 742 | printf("Generating public/private %s key pair.\n", key_type_name); |
fa08c86b | 743 | private = key_generate(type, bits); |
744 | if (private == NULL) { | |
745 | fprintf(stderr, "key_generate failed"); | |
746 | exit(1); | |
747 | } | |
748 | public = key_from_private(private); | |
5260325f | 749 | |
750 | if (!have_identity) | |
751 | ask_filename(pw, "Enter file in which to save the key"); | |
752 | ||
753 | /* Create ~/.ssh directory if it doesn\'t already exist. */ | |
42f11eb2 | 754 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 755 | if (strstr(identity_file, dotsshdir) != NULL && |
756 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 757 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 758 | error("Could not create directory '%s'.", dotsshdir); |
759 | else if (!quiet) | |
760 | printf("Created directory '%s'.\n", dotsshdir); | |
761 | } | |
762 | /* If the file already exists, ask the user to confirm. */ | |
763 | if (stat(identity_file, &st) >= 0) { | |
764 | char yesno[3]; | |
765 | printf("%s already exists.\n", identity_file); | |
766 | printf("Overwrite (y/n)? "); | |
767 | fflush(stdout); | |
768 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
769 | exit(1); | |
770 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
771 | exit(1); | |
772 | } | |
773 | /* Ask for a passphrase (twice). */ | |
774 | if (identity_passphrase) | |
775 | passphrase1 = xstrdup(identity_passphrase); | |
776 | else if (identity_new_passphrase) | |
777 | passphrase1 = xstrdup(identity_new_passphrase); | |
778 | else { | |
779 | passphrase_again: | |
780 | passphrase1 = | |
781 | read_passphrase("Enter passphrase (empty for no passphrase): ", 1); | |
782 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
783 | if (strcmp(passphrase1, passphrase2) != 0) { | |
784 | /* The passphrases do not match. Clear them and retry. */ | |
785 | memset(passphrase1, 0, strlen(passphrase1)); | |
786 | memset(passphrase2, 0, strlen(passphrase2)); | |
787 | xfree(passphrase1); | |
788 | xfree(passphrase2); | |
789 | printf("Passphrases do not match. Try again.\n"); | |
790 | goto passphrase_again; | |
791 | } | |
792 | /* Clear the other copy of the passphrase. */ | |
793 | memset(passphrase2, 0, strlen(passphrase2)); | |
794 | xfree(passphrase2); | |
795 | } | |
796 | ||
5260325f | 797 | if (identity_comment) { |
798 | strlcpy(comment, identity_comment, sizeof(comment)); | |
799 | } else { | |
6ae2364d | 800 | /* Create default commend field for the passphrase. */ |
5260325f | 801 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
802 | } | |
803 | ||
804 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 805 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
5260325f | 806 | printf("Saving the key failed: %s: %s.\n", |
a306f2dd | 807 | identity_file, strerror(errno)); |
5260325f | 808 | memset(passphrase1, 0, strlen(passphrase1)); |
809 | xfree(passphrase1); | |
810 | exit(1); | |
811 | } | |
812 | /* Clear the passphrase. */ | |
813 | memset(passphrase1, 0, strlen(passphrase1)); | |
814 | xfree(passphrase1); | |
815 | ||
816 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 817 | key_free(private); |
5260325f | 818 | arc4random_stir(); |
819 | ||
820 | if (!quiet) | |
821 | printf("Your identification has been saved in %s.\n", identity_file); | |
822 | ||
5260325f | 823 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 824 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
825 | if (fd == -1) { | |
5260325f | 826 | printf("Could not save your public key in %s\n", identity_file); |
827 | exit(1); | |
828 | } | |
1c9a907f | 829 | f = fdopen(fd, "w"); |
830 | if (f == NULL) { | |
831 | printf("fdopen %s failed", identity_file); | |
832 | exit(1); | |
833 | } | |
a306f2dd | 834 | if (!key_write(public, f)) |
835 | fprintf(stderr, "write key failed"); | |
836 | fprintf(f, " %s\n", comment); | |
5260325f | 837 | fclose(f); |
838 | ||
839 | if (!quiet) { | |
22138a36 | 840 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 841 | printf("Your public key has been saved in %s.\n", |
842 | identity_file); | |
5260325f | 843 | printf("The key fingerprint is:\n"); |
22138a36 | 844 | printf("%s %s\n", fp, comment); |
845 | xfree(fp); | |
8efc0c15 | 846 | } |
a306f2dd | 847 | |
848 | key_free(public); | |
5260325f | 849 | exit(0); |
8efc0c15 | 850 | } |