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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" | |
457fc0c6 | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.53 2001/03/26 23:23:24 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" |
457fc0c6 | 22 | #include "rsa.h" |
a306f2dd | 23 | #include "authfile.h" |
24 | #include "uuencode.h" | |
94ec8c6b | 25 | #include "buffer.h" |
26 | #include "bufaux.h" | |
42f11eb2 | 27 | #include "pathnames.h" |
28 | #include "log.h" | |
29 | #include "readpass.h" | |
94ec8c6b | 30 | |
a306f2dd | 31 | /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
8efc0c15 | 32 | int bits = 1024; |
33 | ||
aa3378df | 34 | /* |
35 | * Flag indicating that we just want to change the passphrase. This can be | |
36 | * set on the command line. | |
37 | */ | |
8efc0c15 | 38 | int change_passphrase = 0; |
39 | ||
aa3378df | 40 | /* |
41 | * Flag indicating that we just want to change the comment. This can be set | |
42 | * on the command line. | |
43 | */ | |
8efc0c15 | 44 | int change_comment = 0; |
45 | ||
46 | int quiet = 0; | |
47 | ||
f095fcc7 | 48 | /* Flag indicating that we just want to see the key fingerprint */ |
49 | int print_fingerprint = 0; | |
aaf45d87 | 50 | int print_bubblebabble = 0; |
f095fcc7 | 51 | |
5ad13cd7 | 52 | /* The identity file name, given on the command line or entered by the user. */ |
53 | char identity_file[1024]; | |
54 | int have_identity = 0; | |
8efc0c15 | 55 | |
56 | /* This is set to the passphrase if given on the command line. */ | |
57 | char *identity_passphrase = NULL; | |
58 | ||
59 | /* This is set to the new passphrase if given on the command line. */ | |
60 | char *identity_new_passphrase = NULL; | |
61 | ||
62 | /* This is set to the new comment if given on the command line. */ | |
63 | char *identity_comment = NULL; | |
64 | ||
a306f2dd | 65 | /* Dump public key file in format used by real and the original SSH 2 */ |
66 | int convert_to_ssh2 = 0; | |
67 | int convert_from_ssh2 = 0; | |
68 | int print_public = 0; | |
fa08c86b | 69 | |
c523303b | 70 | /* default to RSA for SSH-1 */ |
71 | char *key_type_name = "rsa1"; | |
a306f2dd | 72 | |
5ad13cd7 | 73 | /* argv0 */ |
5260325f | 74 | #ifdef HAVE___PROGNAME |
5ad13cd7 | 75 | extern char *__progname; |
260d427b | 76 | #else |
77 | char *__progname; | |
78 | #endif | |
8efc0c15 | 79 | |
a306f2dd | 80 | char hostname[MAXHOSTNAMELEN]; |
81 | ||
5ad13cd7 | 82 | void |
83 | ask_filename(struct passwd *pw, const char *prompt) | |
8efc0c15 | 84 | { |
5260325f | 85 | char buf[1024]; |
c523303b | 86 | char *name = NULL; |
87 | ||
88 | switch (key_type_from_name(key_type_name)) { | |
89 | case KEY_RSA1: | |
42f11eb2 | 90 | name = _PATH_SSH_CLIENT_IDENTITY; |
c523303b | 91 | break; |
92 | case KEY_DSA: | |
42f11eb2 | 93 | name = _PATH_SSH_CLIENT_ID_DSA; |
c523303b | 94 | break; |
95 | case KEY_RSA: | |
42f11eb2 | 96 | name = _PATH_SSH_CLIENT_ID_RSA; |
c523303b | 97 | break; |
98 | default: | |
99 | fprintf(stderr, "bad key type"); | |
100 | exit(1); | |
101 | break; | |
102 | } | |
103 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); | |
8d88011e | 104 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
105 | fflush(stderr); | |
5260325f | 106 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
107 | exit(1); | |
108 | if (strchr(buf, '\n')) | |
109 | *strchr(buf, '\n') = 0; | |
110 | if (strcmp(buf, "") != 0) | |
111 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
112 | have_identity = 1; | |
f095fcc7 | 113 | } |
8efc0c15 | 114 | |
aeaa3d9e | 115 | Key * |
116 | try_load_pem_key(char *filename) | |
a306f2dd | 117 | { |
aeaa3d9e | 118 | char *pass; |
119 | Key *prv; | |
120 | ||
121 | prv = key_load_private(filename, "", NULL); | |
122 | if (prv == NULL) { | |
123 | pass = read_passphrase("Enter passphrase: ", 1); | |
124 | prv = key_load_private(filename, pass, NULL); | |
a306f2dd | 125 | memset(pass, 0, strlen(pass)); |
126 | xfree(pass); | |
127 | } | |
aeaa3d9e | 128 | return prv; |
a306f2dd | 129 | } |
130 | ||
94ec8c6b | 131 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
132 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" | |
133 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" | |
2b87da3b | 134 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 135 | |
136 | void | |
137 | do_convert_to_ssh2(struct passwd *pw) | |
138 | { | |
aeaa3d9e | 139 | Key *prv; |
a306f2dd | 140 | int len; |
1e3b8b07 | 141 | u_char *blob; |
a306f2dd | 142 | struct stat st; |
143 | ||
144 | if (!have_identity) | |
145 | ask_filename(pw, "Enter file in which the key is"); | |
146 | if (stat(identity_file, &st) < 0) { | |
147 | perror(identity_file); | |
148 | exit(1); | |
149 | } | |
aeaa3d9e | 150 | prv = try_load_pem_key(identity_file); |
151 | if (prv == NULL) { | |
a306f2dd | 152 | fprintf(stderr, "load failed\n"); |
153 | exit(1); | |
154 | } | |
aeaa3d9e | 155 | key_to_blob(prv, &blob, &len); |
94ec8c6b | 156 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 157 | fprintf(stdout, |
94ec8c6b | 158 | "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
aeaa3d9e | 159 | key_size(prv), key_type(prv), |
a306f2dd | 160 | pw->pw_name, hostname); |
161 | dump_base64(stdout, blob, len); | |
94ec8c6b | 162 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
aeaa3d9e | 163 | key_free(prv); |
a306f2dd | 164 | xfree(blob); |
165 | exit(0); | |
166 | } | |
167 | ||
94ec8c6b | 168 | void |
169 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) | |
170 | { | |
171 | int bits = buffer_get_int(b); | |
172 | int bytes = (bits + 7) / 8; | |
457fc0c6 | 173 | |
94ec8c6b | 174 | if (buffer_len(b) < bytes) |
457fc0c6 | 175 | fatal("buffer_get_bignum_bits: input buffer too small: " |
176 | "need %d have %d", bytes, buffer_len(b)); | |
1e3b8b07 | 177 | BN_bin2bn((u_char *)buffer_ptr(b), bytes, value); |
94ec8c6b | 178 | buffer_consume(b, bytes); |
179 | } | |
180 | ||
181 | Key * | |
182 | do_convert_private_ssh2_from_blob(char *blob, int blen) | |
183 | { | |
184 | Buffer b; | |
94ec8c6b | 185 | Key *key = NULL; |
457fc0c6 | 186 | int ignore, magic, rlen, ktype; |
94ec8c6b | 187 | char *type, *cipher; |
188 | ||
189 | buffer_init(&b); | |
190 | buffer_append(&b, blob, blen); | |
191 | ||
192 | magic = buffer_get_int(&b); | |
193 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
194 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
195 | buffer_free(&b); | |
196 | return NULL; | |
197 | } | |
198 | ignore = buffer_get_int(&b); | |
199 | type = buffer_get_string(&b, NULL); | |
200 | cipher = buffer_get_string(&b, NULL); | |
201 | ignore = buffer_get_int(&b); | |
202 | ignore = buffer_get_int(&b); | |
203 | ignore = buffer_get_int(&b); | |
94ec8c6b | 204 | |
205 | if (strcmp(cipher, "none") != 0) { | |
206 | error("unsupported cipher %s", cipher); | |
207 | xfree(cipher); | |
208 | buffer_free(&b); | |
457fc0c6 | 209 | xfree(type); |
94ec8c6b | 210 | return NULL; |
211 | } | |
212 | xfree(cipher); | |
213 | ||
457fc0c6 | 214 | if (strstr(type, "dsa")) { |
215 | ktype = KEY_DSA; | |
216 | } else if (strstr(type, "rsa")) { | |
217 | ktype = KEY_RSA; | |
218 | } else { | |
219 | xfree(type); | |
94ec8c6b | 220 | return NULL; |
221 | } | |
457fc0c6 | 222 | key = key_new_private(ktype); |
223 | xfree(type); | |
224 | ||
225 | switch (key->type) { | |
226 | case KEY_DSA: | |
227 | buffer_get_bignum_bits(&b, key->dsa->p); | |
228 | buffer_get_bignum_bits(&b, key->dsa->g); | |
229 | buffer_get_bignum_bits(&b, key->dsa->q); | |
230 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
231 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
232 | break; | |
233 | case KEY_RSA: | |
234 | if (!BN_set_word(key->rsa->e, (u_long) buffer_get_char(&b))) { | |
235 | buffer_free(&b); | |
236 | key_free(key); | |
237 | return NULL; | |
238 | } | |
239 | buffer_get_bignum_bits(&b, key->rsa->d); | |
240 | buffer_get_bignum_bits(&b, key->rsa->n); | |
241 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
242 | buffer_get_bignum_bits(&b, key->rsa->q); | |
243 | buffer_get_bignum_bits(&b, key->rsa->p); | |
244 | generate_additional_parameters(key->rsa); | |
245 | break; | |
246 | } | |
94ec8c6b | 247 | rlen = buffer_len(&b); |
248 | if(rlen != 0) | |
457fc0c6 | 249 | error("do_convert_private_ssh2_from_blob: " |
250 | "remaining bytes in key blob %d", rlen); | |
94ec8c6b | 251 | buffer_free(&b); |
457fc0c6 | 252 | #ifdef DEBUG_PK |
253 | { | |
254 | u_int slen; | |
255 | u_char *sig, data[10] = "abcde12345"; | |
256 | ||
257 | key_sign(key, &sig, &slen, data, sizeof data); | |
258 | key_verify(key, sig, slen, data, sizeof data); | |
259 | free(sig); | |
260 | } | |
261 | #endif | |
94ec8c6b | 262 | return key; |
263 | } | |
264 | ||
a306f2dd | 265 | void |
266 | do_convert_from_ssh2(struct passwd *pw) | |
267 | { | |
268 | Key *k; | |
269 | int blen; | |
270 | char line[1024], *p; | |
271 | char blob[8096]; | |
272 | char encoded[8096]; | |
273 | struct stat st; | |
94ec8c6b | 274 | int escaped = 0, private = 0, ok; |
a306f2dd | 275 | FILE *fp; |
276 | ||
277 | if (!have_identity) | |
278 | ask_filename(pw, "Enter file in which the key is"); | |
279 | if (stat(identity_file, &st) < 0) { | |
280 | perror(identity_file); | |
281 | exit(1); | |
282 | } | |
283 | fp = fopen(identity_file, "r"); | |
284 | if (fp == NULL) { | |
285 | perror(identity_file); | |
286 | exit(1); | |
287 | } | |
288 | encoded[0] = '\0'; | |
289 | while (fgets(line, sizeof(line), fp)) { | |
d0c832f3 | 290 | if (!(p = strchr(line, '\n'))) { |
291 | fprintf(stderr, "input line too long.\n"); | |
292 | exit(1); | |
293 | } | |
294 | if (p > line && p[-1] == '\\') | |
295 | escaped++; | |
a306f2dd | 296 | if (strncmp(line, "----", 4) == 0 || |
297 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 298 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
299 | private = 1; | |
a306f2dd | 300 | fprintf(stderr, "ignore: %s", line); |
301 | continue; | |
302 | } | |
d0c832f3 | 303 | if (escaped) { |
304 | escaped--; | |
305 | fprintf(stderr, "escaped: %s", line); | |
306 | continue; | |
a306f2dd | 307 | } |
308 | *p = '\0'; | |
309 | strlcat(encoded, line, sizeof(encoded)); | |
310 | } | |
1e3b8b07 | 311 | blen = uudecode(encoded, (u_char *)blob, sizeof(blob)); |
a306f2dd | 312 | if (blen < 0) { |
313 | fprintf(stderr, "uudecode failed.\n"); | |
314 | exit(1); | |
315 | } | |
94ec8c6b | 316 | k = private ? |
317 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 318 | key_from_blob(blob, blen); |
94ec8c6b | 319 | if (k == NULL) { |
320 | fprintf(stderr, "decode blob failed.\n"); | |
321 | exit(1); | |
322 | } | |
323 | ok = private ? | |
457fc0c6 | 324 | (k->type == KEY_DSA ? |
325 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
326 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
94ec8c6b | 327 | key_write(k, stdout); |
328 | if (!ok) { | |
329 | fprintf(stderr, "key write failed"); | |
330 | exit(1); | |
331 | } | |
a306f2dd | 332 | key_free(k); |
333 | fprintf(stdout, "\n"); | |
334 | fclose(fp); | |
335 | exit(0); | |
336 | } | |
337 | ||
338 | void | |
339 | do_print_public(struct passwd *pw) | |
340 | { | |
aeaa3d9e | 341 | Key *prv; |
a306f2dd | 342 | struct stat st; |
343 | ||
344 | if (!have_identity) | |
345 | ask_filename(pw, "Enter file in which the key is"); | |
346 | if (stat(identity_file, &st) < 0) { | |
347 | perror(identity_file); | |
348 | exit(1); | |
349 | } | |
aeaa3d9e | 350 | prv = try_load_pem_key(identity_file); |
351 | if (prv == NULL) { | |
a306f2dd | 352 | fprintf(stderr, "load failed\n"); |
353 | exit(1); | |
354 | } | |
aeaa3d9e | 355 | if (!key_write(prv, stdout)) |
a306f2dd | 356 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 357 | key_free(prv); |
a306f2dd | 358 | fprintf(stdout, "\n"); |
359 | exit(0); | |
360 | } | |
361 | ||
f095fcc7 | 362 | void |
363 | do_fingerprint(struct passwd *pw) | |
364 | { | |
c8d54615 | 365 | FILE *f; |
a306f2dd | 366 | Key *public; |
aaf45d87 | 367 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
aeaa3d9e | 368 | int i, skip = 0, num = 1, invalid = 1, rep, fptype; |
5260325f | 369 | struct stat st; |
370 | ||
aeaa3d9e | 371 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
372 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 373 | |
5260325f | 374 | if (!have_identity) |
375 | ask_filename(pw, "Enter file in which the key is"); | |
376 | if (stat(identity_file, &st) < 0) { | |
377 | perror(identity_file); | |
378 | exit(1); | |
379 | } | |
aeaa3d9e | 380 | public = key_load_public(identity_file, &comment); |
381 | if (public != NULL) { | |
382 | fp = key_fingerprint(public, fptype, rep); | |
383 | printf("%d %s %s\n", key_size(public), fp, comment); | |
a306f2dd | 384 | key_free(public); |
fa08c86b | 385 | xfree(comment); |
aaf45d87 | 386 | xfree(fp); |
c8d54615 | 387 | exit(0); |
388 | } | |
aeaa3d9e | 389 | if (comment) |
390 | xfree(comment); | |
c8d54615 | 391 | |
392 | f = fopen(identity_file, "r"); | |
393 | if (f != NULL) { | |
c8d54615 | 394 | while (fgets(line, sizeof(line), f)) { |
395 | i = strlen(line) - 1; | |
396 | if (line[i] != '\n') { | |
397 | error("line %d too long: %.40s...", num, line); | |
398 | skip = 1; | |
399 | continue; | |
400 | } | |
401 | num++; | |
402 | if (skip) { | |
403 | skip = 0; | |
404 | continue; | |
405 | } | |
406 | line[i] = '\0'; | |
407 | ||
408 | /* Skip leading whitespace, empty and comment lines. */ | |
409 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
410 | ; | |
411 | if (!*cp || *cp == '\n' || *cp == '#') | |
412 | continue ; | |
413 | i = strtol(cp, &ep, 10); | |
414 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
415 | int quoted = 0; | |
416 | comment = cp; | |
417 | for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { | |
418 | if (*cp == '\\' && cp[1] == '"') | |
419 | cp++; /* Skip both */ | |
420 | else if (*cp == '"') | |
421 | quoted = !quoted; | |
422 | } | |
423 | if (!*cp) | |
424 | continue; | |
425 | *cp++ = '\0'; | |
426 | } | |
427 | ep = cp; | |
efcae5b1 | 428 | public = key_new(KEY_RSA1); |
429 | if (key_read(public, &cp) != 1) { | |
430 | cp = ep; | |
431 | key_free(public); | |
432 | public = key_new(KEY_UNSPEC); | |
433 | if (key_read(public, &cp) != 1) { | |
434 | key_free(public); | |
435 | continue; | |
436 | } | |
5260325f | 437 | } |
efcae5b1 | 438 | comment = *cp ? cp : comment; |
aeaa3d9e | 439 | fp = key_fingerprint(public, fptype, rep); |
aaf45d87 | 440 | printf("%d %s %s\n", key_size(public), fp, |
efcae5b1 | 441 | comment ? comment : "no comment"); |
aaf45d87 | 442 | xfree(fp); |
aeaa3d9e | 443 | key_free(public); |
efcae5b1 | 444 | invalid = 0; |
5260325f | 445 | } |
c8d54615 | 446 | fclose(f); |
447 | } | |
448 | if (invalid) { | |
449 | printf("%s is not a valid key file.\n", identity_file); | |
450 | exit(1); | |
5260325f | 451 | } |
5260325f | 452 | exit(0); |
f095fcc7 | 453 | } |
454 | ||
5260325f | 455 | /* |
456 | * Perform changing a passphrase. The argument is the passwd structure | |
457 | * for the current user. | |
458 | */ | |
f095fcc7 | 459 | void |
460 | do_change_passphrase(struct passwd *pw) | |
461 | { | |
5260325f | 462 | char *comment; |
463 | char *old_passphrase, *passphrase1, *passphrase2; | |
464 | struct stat st; | |
a306f2dd | 465 | Key *private; |
5260325f | 466 | |
467 | if (!have_identity) | |
468 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 469 | if (stat(identity_file, &st) < 0) { |
470 | perror(identity_file); | |
471 | exit(1); | |
472 | } | |
5260325f | 473 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 474 | private = key_load_private(identity_file, "", &comment); |
475 | if (private == NULL) { | |
5260325f | 476 | if (identity_passphrase) |
477 | old_passphrase = xstrdup(identity_passphrase); | |
478 | else | |
479 | old_passphrase = read_passphrase("Enter old passphrase: ", 1); | |
aeaa3d9e | 480 | private = key_load_private(identity_file, old_passphrase , &comment); |
481 | memset(old_passphrase, 0, strlen(old_passphrase)); | |
482 | xfree(old_passphrase); | |
483 | if (private == NULL) { | |
5260325f | 484 | printf("Bad passphrase.\n"); |
485 | exit(1); | |
486 | } | |
5260325f | 487 | } |
488 | printf("Key has comment '%s'\n", comment); | |
489 | ||
490 | /* Ask the new passphrase (twice). */ | |
491 | if (identity_new_passphrase) { | |
492 | passphrase1 = xstrdup(identity_new_passphrase); | |
493 | passphrase2 = NULL; | |
494 | } else { | |
495 | passphrase1 = | |
496 | read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); | |
497 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
498 | ||
499 | /* Verify that they are the same. */ | |
500 | if (strcmp(passphrase1, passphrase2) != 0) { | |
501 | memset(passphrase1, 0, strlen(passphrase1)); | |
502 | memset(passphrase2, 0, strlen(passphrase2)); | |
503 | xfree(passphrase1); | |
504 | xfree(passphrase2); | |
505 | printf("Pass phrases do not match. Try again.\n"); | |
506 | exit(1); | |
507 | } | |
508 | /* Destroy the other copy. */ | |
509 | memset(passphrase2, 0, strlen(passphrase2)); | |
510 | xfree(passphrase2); | |
8efc0c15 | 511 | } |
8efc0c15 | 512 | |
5260325f | 513 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 514 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
5260325f | 515 | printf("Saving the key failed: %s: %s.\n", |
516 | identity_file, strerror(errno)); | |
517 | memset(passphrase1, 0, strlen(passphrase1)); | |
518 | xfree(passphrase1); | |
a306f2dd | 519 | key_free(private); |
5260325f | 520 | xfree(comment); |
521 | exit(1); | |
522 | } | |
523 | /* Destroy the passphrase and the copy of the key in memory. */ | |
524 | memset(passphrase1, 0, strlen(passphrase1)); | |
525 | xfree(passphrase1); | |
a306f2dd | 526 | key_free(private); /* Destroys contents */ |
5260325f | 527 | xfree(comment); |
528 | ||
529 | printf("Your identification has been saved with the new passphrase.\n"); | |
530 | exit(0); | |
531 | } | |
8efc0c15 | 532 | |
5260325f | 533 | /* |
534 | * Change the comment of a private key file. | |
535 | */ | |
8efc0c15 | 536 | void |
537 | do_change_comment(struct passwd *pw) | |
538 | { | |
1c9a907f | 539 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 540 | Key *private; |
541 | Key *public; | |
5260325f | 542 | struct stat st; |
543 | FILE *f; | |
1c9a907f | 544 | int fd; |
5260325f | 545 | |
546 | if (!have_identity) | |
547 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 548 | if (stat(identity_file, &st) < 0) { |
549 | perror(identity_file); | |
550 | exit(1); | |
551 | } | |
aeaa3d9e | 552 | private = key_load_private(identity_file, "", &comment); |
553 | if (private == NULL) { | |
5260325f | 554 | if (identity_passphrase) |
555 | passphrase = xstrdup(identity_passphrase); | |
556 | else if (identity_new_passphrase) | |
557 | passphrase = xstrdup(identity_new_passphrase); | |
558 | else | |
559 | passphrase = read_passphrase("Enter passphrase: ", 1); | |
560 | /* Try to load using the passphrase. */ | |
aeaa3d9e | 561 | private = key_load_private(identity_file, passphrase, &comment); |
562 | if (private == NULL) { | |
5260325f | 563 | memset(passphrase, 0, strlen(passphrase)); |
564 | xfree(passphrase); | |
565 | printf("Bad passphrase.\n"); | |
566 | exit(1); | |
567 | } | |
aeaa3d9e | 568 | } else { |
569 | passphrase = xstrdup(""); | |
5260325f | 570 | } |
aeaa3d9e | 571 | if (private->type != KEY_RSA1) { |
572 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
573 | key_free(private); | |
574 | exit(1); | |
575 | } | |
5260325f | 576 | printf("Key now has comment '%s'\n", comment); |
577 | ||
578 | if (identity_comment) { | |
579 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
580 | } else { | |
581 | printf("Enter new comment: "); | |
582 | fflush(stdout); | |
583 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
584 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 585 | key_free(private); |
5260325f | 586 | exit(1); |
587 | } | |
5260325f | 588 | if (strchr(new_comment, '\n')) |
589 | *strchr(new_comment, '\n') = 0; | |
590 | } | |
591 | ||
592 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 593 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
5260325f | 594 | printf("Saving the key failed: %s: %s.\n", |
595 | identity_file, strerror(errno)); | |
596 | memset(passphrase, 0, strlen(passphrase)); | |
597 | xfree(passphrase); | |
a306f2dd | 598 | key_free(private); |
5260325f | 599 | xfree(comment); |
600 | exit(1); | |
8efc0c15 | 601 | } |
5260325f | 602 | memset(passphrase, 0, strlen(passphrase)); |
603 | xfree(passphrase); | |
aeaa3d9e | 604 | public = key_from_private(private); |
a306f2dd | 605 | key_free(private); |
5260325f | 606 | |
5260325f | 607 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 608 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
609 | if (fd == -1) { | |
5260325f | 610 | printf("Could not save your public key in %s\n", identity_file); |
611 | exit(1); | |
612 | } | |
1c9a907f | 613 | f = fdopen(fd, "w"); |
614 | if (f == NULL) { | |
615 | printf("fdopen %s failed", identity_file); | |
616 | exit(1); | |
617 | } | |
a306f2dd | 618 | if (!key_write(public, f)) |
619 | fprintf(stderr, "write key failed"); | |
620 | key_free(public); | |
621 | fprintf(f, " %s\n", new_comment); | |
5260325f | 622 | fclose(f); |
623 | ||
624 | xfree(comment); | |
625 | ||
626 | printf("The comment in your key file has been changed.\n"); | |
627 | exit(0); | |
8efc0c15 | 628 | } |
629 | ||
5ad13cd7 | 630 | void |
631 | usage(void) | |
632 | { | |
5e7cb456 | 633 | printf("Usage: %s [-lBpqxXyc] [-t type] [-b bits] [-f file] [-C comment] " |
ed2166d8 | 634 | "[-N new-pass] [-P pass]\n", __progname); |
5260325f | 635 | exit(1); |
5ad13cd7 | 636 | } |
637 | ||
5260325f | 638 | /* |
639 | * Main program for key management. | |
640 | */ | |
8efc0c15 | 641 | int |
642 | main(int ac, char **av) | |
643 | { | |
5260325f | 644 | char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
1c9a907f | 645 | Key *private, *public; |
5260325f | 646 | struct passwd *pw; |
1c9a907f | 647 | int opt, type, fd; |
5260325f | 648 | struct stat st; |
649 | FILE *f; | |
fa08c86b | 650 | |
5260325f | 651 | extern int optind; |
652 | extern char *optarg; | |
653 | ||
260d427b | 654 | __progname = get_progname(av[0]); |
264dce47 | 655 | init_rng(); |
e339aa53 | 656 | seed_rng(); |
264dce47 | 657 | |
fa649821 | 658 | SSLeay_add_all_algorithms(); |
a306f2dd | 659 | |
aa3378df | 660 | /* we need this for the home * directory. */ |
5260325f | 661 | pw = getpwuid(getuid()); |
662 | if (!pw) { | |
663 | printf("You don't exist, go away!\n"); | |
664 | exit(1); | |
665 | } | |
a306f2dd | 666 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
667 | perror("gethostname"); | |
668 | exit(1); | |
669 | } | |
aa3378df | 670 | |
aaf45d87 | 671 | while ((opt = getopt(ac, av, "dqpclBRxXyb:f:t:P:N:C:")) != -1) { |
5260325f | 672 | switch (opt) { |
673 | case 'b': | |
674 | bits = atoi(optarg); | |
675 | if (bits < 512 || bits > 32768) { | |
676 | printf("Bits has bad value.\n"); | |
677 | exit(1); | |
678 | } | |
679 | break; | |
680 | ||
681 | case 'l': | |
682 | print_fingerprint = 1; | |
683 | break; | |
684 | ||
aaf45d87 | 685 | case 'B': |
686 | print_bubblebabble = 1; | |
687 | break; | |
688 | ||
5260325f | 689 | case 'p': |
690 | change_passphrase = 1; | |
691 | break; | |
692 | ||
693 | case 'c': | |
694 | change_comment = 1; | |
695 | break; | |
696 | ||
697 | case 'f': | |
698 | strlcpy(identity_file, optarg, sizeof(identity_file)); | |
699 | have_identity = 1; | |
700 | break; | |
701 | ||
702 | case 'P': | |
703 | identity_passphrase = optarg; | |
704 | break; | |
705 | ||
706 | case 'N': | |
707 | identity_new_passphrase = optarg; | |
708 | break; | |
709 | ||
710 | case 'C': | |
711 | identity_comment = optarg; | |
712 | break; | |
713 | ||
714 | case 'q': | |
715 | quiet = 1; | |
716 | break; | |
717 | ||
a306f2dd | 718 | case 'R': |
fa08c86b | 719 | /* unused */ |
720 | exit(0); | |
a306f2dd | 721 | break; |
722 | ||
723 | case 'x': | |
724 | convert_to_ssh2 = 1; | |
725 | break; | |
726 | ||
727 | case 'X': | |
728 | convert_from_ssh2 = 1; | |
729 | break; | |
730 | ||
731 | case 'y': | |
732 | print_public = 1; | |
733 | break; | |
954f0550 | 734 | |
a306f2dd | 735 | case 'd': |
fa08c86b | 736 | key_type_name = "dsa"; |
a306f2dd | 737 | break; |
738 | ||
fa08c86b | 739 | case 't': |
740 | key_type_name = optarg; | |
fa08c86b | 741 | break; |
742 | ||
5260325f | 743 | case '?': |
744 | default: | |
745 | usage(); | |
746 | } | |
747 | } | |
748 | if (optind < ac) { | |
749 | printf("Too many arguments.\n"); | |
750 | usage(); | |
751 | } | |
752 | if (change_passphrase && change_comment) { | |
753 | printf("Can only have one of -p and -c.\n"); | |
754 | usage(); | |
755 | } | |
aaf45d87 | 756 | if (print_fingerprint || print_bubblebabble) |
5260325f | 757 | do_fingerprint(pw); |
5260325f | 758 | if (change_passphrase) |
759 | do_change_passphrase(pw); | |
5260325f | 760 | if (change_comment) |
761 | do_change_comment(pw); | |
a306f2dd | 762 | if (convert_to_ssh2) |
763 | do_convert_to_ssh2(pw); | |
764 | if (convert_from_ssh2) | |
765 | do_convert_from_ssh2(pw); | |
766 | if (print_public) | |
767 | do_print_public(pw); | |
5260325f | 768 | |
769 | arc4random_stir(); | |
770 | ||
c523303b | 771 | type = key_type_from_name(key_type_name); |
772 | if (type == KEY_UNSPEC) { | |
773 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
774 | exit(1); | |
a306f2dd | 775 | } |
fa08c86b | 776 | if (!quiet) |
c523303b | 777 | printf("Generating public/private %s key pair.\n", key_type_name); |
fa08c86b | 778 | private = key_generate(type, bits); |
779 | if (private == NULL) { | |
780 | fprintf(stderr, "key_generate failed"); | |
781 | exit(1); | |
782 | } | |
783 | public = key_from_private(private); | |
5260325f | 784 | |
785 | if (!have_identity) | |
786 | ask_filename(pw, "Enter file in which to save the key"); | |
787 | ||
788 | /* Create ~/.ssh directory if it doesn\'t already exist. */ | |
42f11eb2 | 789 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 790 | if (strstr(identity_file, dotsshdir) != NULL && |
791 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 792 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 793 | error("Could not create directory '%s'.", dotsshdir); |
794 | else if (!quiet) | |
795 | printf("Created directory '%s'.\n", dotsshdir); | |
796 | } | |
797 | /* If the file already exists, ask the user to confirm. */ | |
798 | if (stat(identity_file, &st) >= 0) { | |
799 | char yesno[3]; | |
800 | printf("%s already exists.\n", identity_file); | |
801 | printf("Overwrite (y/n)? "); | |
802 | fflush(stdout); | |
803 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
804 | exit(1); | |
805 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
806 | exit(1); | |
807 | } | |
808 | /* Ask for a passphrase (twice). */ | |
809 | if (identity_passphrase) | |
810 | passphrase1 = xstrdup(identity_passphrase); | |
811 | else if (identity_new_passphrase) | |
812 | passphrase1 = xstrdup(identity_new_passphrase); | |
813 | else { | |
814 | passphrase_again: | |
815 | passphrase1 = | |
816 | read_passphrase("Enter passphrase (empty for no passphrase): ", 1); | |
817 | passphrase2 = read_passphrase("Enter same passphrase again: ", 1); | |
818 | if (strcmp(passphrase1, passphrase2) != 0) { | |
819 | /* The passphrases do not match. Clear them and retry. */ | |
820 | memset(passphrase1, 0, strlen(passphrase1)); | |
821 | memset(passphrase2, 0, strlen(passphrase2)); | |
822 | xfree(passphrase1); | |
823 | xfree(passphrase2); | |
824 | printf("Passphrases do not match. Try again.\n"); | |
825 | goto passphrase_again; | |
826 | } | |
827 | /* Clear the other copy of the passphrase. */ | |
828 | memset(passphrase2, 0, strlen(passphrase2)); | |
829 | xfree(passphrase2); | |
830 | } | |
831 | ||
5260325f | 832 | if (identity_comment) { |
833 | strlcpy(comment, identity_comment, sizeof(comment)); | |
834 | } else { | |
6ae2364d | 835 | /* Create default commend field for the passphrase. */ |
5260325f | 836 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
837 | } | |
838 | ||
839 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 840 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
5260325f | 841 | printf("Saving the key failed: %s: %s.\n", |
a306f2dd | 842 | identity_file, strerror(errno)); |
5260325f | 843 | memset(passphrase1, 0, strlen(passphrase1)); |
844 | xfree(passphrase1); | |
845 | exit(1); | |
846 | } | |
847 | /* Clear the passphrase. */ | |
848 | memset(passphrase1, 0, strlen(passphrase1)); | |
849 | xfree(passphrase1); | |
850 | ||
851 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 852 | key_free(private); |
5260325f | 853 | arc4random_stir(); |
854 | ||
855 | if (!quiet) | |
856 | printf("Your identification has been saved in %s.\n", identity_file); | |
857 | ||
5260325f | 858 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 859 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
860 | if (fd == -1) { | |
5260325f | 861 | printf("Could not save your public key in %s\n", identity_file); |
862 | exit(1); | |
863 | } | |
1c9a907f | 864 | f = fdopen(fd, "w"); |
865 | if (f == NULL) { | |
866 | printf("fdopen %s failed", identity_file); | |
867 | exit(1); | |
868 | } | |
a306f2dd | 869 | if (!key_write(public, f)) |
870 | fprintf(stderr, "write key failed"); | |
871 | fprintf(f, " %s\n", comment); | |
5260325f | 872 | fclose(f); |
873 | ||
874 | if (!quiet) { | |
22138a36 | 875 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 876 | printf("Your public key has been saved in %s.\n", |
877 | identity_file); | |
5260325f | 878 | printf("The key fingerprint is:\n"); |
22138a36 | 879 | printf("%s %s\n", fp, comment); |
880 | xfree(fp); | |
8efc0c15 | 881 | } |
a306f2dd | 882 | |
883 | key_free(public); | |
5260325f | 884 | exit(0); |
8efc0c15 | 885 | } |