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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" | |
86c4f63d | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.96 2002/03/21 21:54:34 rees 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 | |
93a56445 | 31 | #ifdef SMARTCARD |
93a56445 | 32 | #include "scard.h" |
dd2495cb | 33 | #endif |
2b30154a | 34 | |
a306f2dd | 35 | /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
8efc0c15 | 36 | int bits = 1024; |
37 | ||
aa3378df | 38 | /* |
39 | * Flag indicating that we just want to change the passphrase. This can be | |
40 | * set on the command line. | |
41 | */ | |
8efc0c15 | 42 | int change_passphrase = 0; |
43 | ||
aa3378df | 44 | /* |
45 | * Flag indicating that we just want to change the comment. This can be set | |
46 | * on the command line. | |
47 | */ | |
8efc0c15 | 48 | int change_comment = 0; |
49 | ||
50 | int quiet = 0; | |
51 | ||
f095fcc7 | 52 | /* Flag indicating that we just want to see the key fingerprint */ |
53 | int print_fingerprint = 0; | |
aaf45d87 | 54 | int print_bubblebabble = 0; |
f095fcc7 | 55 | |
5ad13cd7 | 56 | /* The identity file name, given on the command line or entered by the user. */ |
57 | char identity_file[1024]; | |
58 | int have_identity = 0; | |
8efc0c15 | 59 | |
60 | /* This is set to the passphrase if given on the command line. */ | |
61 | char *identity_passphrase = NULL; | |
62 | ||
63 | /* This is set to the new passphrase if given on the command line. */ | |
64 | char *identity_new_passphrase = NULL; | |
65 | ||
66 | /* This is set to the new comment if given on the command line. */ | |
67 | char *identity_comment = NULL; | |
68 | ||
a306f2dd | 69 | /* Dump public key file in format used by real and the original SSH 2 */ |
70 | int convert_to_ssh2 = 0; | |
71 | int convert_from_ssh2 = 0; | |
72 | int print_public = 0; | |
fa08c86b | 73 | |
3dc93cd8 | 74 | char *key_type_name = NULL; |
a306f2dd | 75 | |
5ad13cd7 | 76 | /* argv0 */ |
5260325f | 77 | #ifdef HAVE___PROGNAME |
5ad13cd7 | 78 | extern char *__progname; |
260d427b | 79 | #else |
80 | char *__progname; | |
81 | #endif | |
8efc0c15 | 82 | |
a306f2dd | 83 | char hostname[MAXHOSTNAMELEN]; |
84 | ||
396c147e | 85 | static void |
5ad13cd7 | 86 | ask_filename(struct passwd *pw, const char *prompt) |
8efc0c15 | 87 | { |
5260325f | 88 | char buf[1024]; |
c523303b | 89 | char *name = NULL; |
90 | ||
8d22d775 | 91 | if (key_type_name == NULL) |
42f11eb2 | 92 | name = _PATH_SSH_CLIENT_ID_RSA; |
8d22d775 | 93 | else |
94 | switch (key_type_from_name(key_type_name)) { | |
95 | case KEY_RSA1: | |
96 | name = _PATH_SSH_CLIENT_IDENTITY; | |
97 | break; | |
98 | case KEY_DSA: | |
99 | name = _PATH_SSH_CLIENT_ID_DSA; | |
100 | break; | |
101 | case KEY_RSA: | |
102 | name = _PATH_SSH_CLIENT_ID_RSA; | |
103 | break; | |
104 | default: | |
105 | fprintf(stderr, "bad key type"); | |
106 | exit(1); | |
107 | break; | |
108 | } | |
109 | ||
c523303b | 110 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
8d88011e | 111 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
112 | fflush(stderr); | |
5260325f | 113 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
114 | exit(1); | |
115 | if (strchr(buf, '\n')) | |
116 | *strchr(buf, '\n') = 0; | |
117 | if (strcmp(buf, "") != 0) | |
118 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
119 | have_identity = 1; | |
f095fcc7 | 120 | } |
8efc0c15 | 121 | |
396c147e | 122 | static Key * |
abe0fb9f | 123 | load_identity(char *filename) |
a306f2dd | 124 | { |
aeaa3d9e | 125 | char *pass; |
126 | Key *prv; | |
127 | ||
cd332296 | 128 | prv = key_load_private(filename, "", NULL); |
aeaa3d9e | 129 | if (prv == NULL) { |
abe0fb9f | 130 | if (identity_passphrase) |
131 | pass = xstrdup(identity_passphrase); | |
132 | else | |
1843a425 | 133 | pass = read_passphrase("Enter passphrase: ", |
134 | RP_ALLOW_STDIN); | |
aeaa3d9e | 135 | prv = key_load_private(filename, pass, NULL); |
a306f2dd | 136 | memset(pass, 0, strlen(pass)); |
137 | xfree(pass); | |
138 | } | |
aeaa3d9e | 139 | return prv; |
a306f2dd | 140 | } |
141 | ||
94ec8c6b | 142 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
143 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" | |
144 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" | |
2b87da3b | 145 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 146 | |
396c147e | 147 | static void |
a306f2dd | 148 | do_convert_to_ssh2(struct passwd *pw) |
149 | { | |
b587c165 | 150 | Key *k; |
21b30f38 | 151 | u_int len; |
1e3b8b07 | 152 | u_char *blob; |
a306f2dd | 153 | struct stat st; |
154 | ||
155 | if (!have_identity) | |
156 | ask_filename(pw, "Enter file in which the key is"); | |
157 | if (stat(identity_file, &st) < 0) { | |
158 | perror(identity_file); | |
159 | exit(1); | |
160 | } | |
b587c165 | 161 | if ((k = key_load_public(identity_file, NULL)) == NULL) { |
abe0fb9f | 162 | if ((k = load_identity(identity_file)) == NULL) { |
b587c165 | 163 | fprintf(stderr, "load failed\n"); |
164 | exit(1); | |
165 | } | |
a306f2dd | 166 | } |
f7436b8c | 167 | if (key_to_blob(k, &blob, &len) <= 0) { |
168 | fprintf(stderr, "key_to_blob failed\n"); | |
169 | exit(1); | |
170 | } | |
94ec8c6b | 171 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 172 | fprintf(stdout, |
94ec8c6b | 173 | "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
b587c165 | 174 | key_size(k), key_type(k), |
a306f2dd | 175 | pw->pw_name, hostname); |
176 | dump_base64(stdout, blob, len); | |
94ec8c6b | 177 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
b587c165 | 178 | key_free(k); |
a306f2dd | 179 | xfree(blob); |
180 | exit(0); | |
181 | } | |
182 | ||
396c147e | 183 | static void |
94ec8c6b | 184 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
185 | { | |
186 | int bits = buffer_get_int(b); | |
187 | int bytes = (bits + 7) / 8; | |
457fc0c6 | 188 | |
94ec8c6b | 189 | if (buffer_len(b) < bytes) |
457fc0c6 | 190 | fatal("buffer_get_bignum_bits: input buffer too small: " |
191 | "need %d have %d", bytes, buffer_len(b)); | |
20905a8e | 192 | BN_bin2bn(buffer_ptr(b), bytes, value); |
94ec8c6b | 193 | buffer_consume(b, bytes); |
194 | } | |
195 | ||
396c147e | 196 | static Key * |
c66f9d0e | 197 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
94ec8c6b | 198 | { |
199 | Buffer b; | |
94ec8c6b | 200 | Key *key = NULL; |
a599bd06 | 201 | char *type, *cipher; |
d3260e12 | 202 | u_char *sig, data[] = "abcde12345"; |
2e0becb6 | 203 | int magic, rlen, ktype, i1, i2, i3, i4; |
a599bd06 | 204 | u_int slen; |
2e0becb6 | 205 | u_long e; |
94ec8c6b | 206 | |
207 | buffer_init(&b); | |
208 | buffer_append(&b, blob, blen); | |
209 | ||
210 | magic = buffer_get_int(&b); | |
211 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
212 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
213 | buffer_free(&b); | |
214 | return NULL; | |
215 | } | |
2e0becb6 | 216 | i1 = buffer_get_int(&b); |
94ec8c6b | 217 | type = buffer_get_string(&b, NULL); |
218 | cipher = buffer_get_string(&b, NULL); | |
2e0becb6 | 219 | i2 = buffer_get_int(&b); |
220 | i3 = buffer_get_int(&b); | |
221 | i4 = buffer_get_int(&b); | |
222 | debug("ignore (%d %d %d %d)", i1,i2,i3,i4); | |
94ec8c6b | 223 | if (strcmp(cipher, "none") != 0) { |
224 | error("unsupported cipher %s", cipher); | |
225 | xfree(cipher); | |
226 | buffer_free(&b); | |
457fc0c6 | 227 | xfree(type); |
94ec8c6b | 228 | return NULL; |
229 | } | |
230 | xfree(cipher); | |
231 | ||
457fc0c6 | 232 | if (strstr(type, "dsa")) { |
233 | ktype = KEY_DSA; | |
234 | } else if (strstr(type, "rsa")) { | |
235 | ktype = KEY_RSA; | |
236 | } else { | |
237 | xfree(type); | |
94ec8c6b | 238 | return NULL; |
239 | } | |
457fc0c6 | 240 | key = key_new_private(ktype); |
241 | xfree(type); | |
242 | ||
243 | switch (key->type) { | |
244 | case KEY_DSA: | |
245 | buffer_get_bignum_bits(&b, key->dsa->p); | |
246 | buffer_get_bignum_bits(&b, key->dsa->g); | |
247 | buffer_get_bignum_bits(&b, key->dsa->q); | |
248 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
249 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
250 | break; | |
251 | case KEY_RSA: | |
2e0becb6 | 252 | e = buffer_get_char(&b); |
253 | debug("e %lx", e); | |
254 | if (e < 30) { | |
255 | e <<= 8; | |
256 | e += buffer_get_char(&b); | |
257 | debug("e %lx", e); | |
258 | e <<= 8; | |
259 | e += buffer_get_char(&b); | |
260 | debug("e %lx", e); | |
261 | } | |
262 | if (!BN_set_word(key->rsa->e, e)) { | |
457fc0c6 | 263 | buffer_free(&b); |
264 | key_free(key); | |
265 | return NULL; | |
266 | } | |
267 | buffer_get_bignum_bits(&b, key->rsa->d); | |
268 | buffer_get_bignum_bits(&b, key->rsa->n); | |
269 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
270 | buffer_get_bignum_bits(&b, key->rsa->q); | |
271 | buffer_get_bignum_bits(&b, key->rsa->p); | |
2b63e803 | 272 | rsa_generate_additional_parameters(key->rsa); |
457fc0c6 | 273 | break; |
274 | } | |
94ec8c6b | 275 | rlen = buffer_len(&b); |
6aacefa7 | 276 | if (rlen != 0) |
457fc0c6 | 277 | error("do_convert_private_ssh2_from_blob: " |
278 | "remaining bytes in key blob %d", rlen); | |
94ec8c6b | 279 | buffer_free(&b); |
a599bd06 | 280 | |
281 | /* try the key */ | |
282 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
283 | key_verify(key, sig, slen, data, sizeof(data)); | |
284 | xfree(sig); | |
94ec8c6b | 285 | return key; |
286 | } | |
287 | ||
396c147e | 288 | static void |
a306f2dd | 289 | do_convert_from_ssh2(struct passwd *pw) |
290 | { | |
291 | Key *k; | |
292 | int blen; | |
293 | char line[1024], *p; | |
cf54363d | 294 | u_char blob[8096]; |
a306f2dd | 295 | char encoded[8096]; |
296 | struct stat st; | |
94ec8c6b | 297 | int escaped = 0, private = 0, ok; |
a306f2dd | 298 | FILE *fp; |
299 | ||
300 | if (!have_identity) | |
301 | ask_filename(pw, "Enter file in which the key is"); | |
302 | if (stat(identity_file, &st) < 0) { | |
303 | perror(identity_file); | |
304 | exit(1); | |
305 | } | |
306 | fp = fopen(identity_file, "r"); | |
307 | if (fp == NULL) { | |
308 | perror(identity_file); | |
309 | exit(1); | |
310 | } | |
311 | encoded[0] = '\0'; | |
312 | while (fgets(line, sizeof(line), fp)) { | |
d0c832f3 | 313 | if (!(p = strchr(line, '\n'))) { |
314 | fprintf(stderr, "input line too long.\n"); | |
315 | exit(1); | |
316 | } | |
317 | if (p > line && p[-1] == '\\') | |
318 | escaped++; | |
a306f2dd | 319 | if (strncmp(line, "----", 4) == 0 || |
320 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 321 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
322 | private = 1; | |
a599bd06 | 323 | if (strstr(line, " END ") != NULL) { |
324 | break; | |
325 | } | |
012bc0e1 | 326 | /* fprintf(stderr, "ignore: %s", line); */ |
a306f2dd | 327 | continue; |
328 | } | |
d0c832f3 | 329 | if (escaped) { |
330 | escaped--; | |
012bc0e1 | 331 | /* fprintf(stderr, "escaped: %s", line); */ |
d0c832f3 | 332 | continue; |
a306f2dd | 333 | } |
334 | *p = '\0'; | |
335 | strlcat(encoded, line, sizeof(encoded)); | |
336 | } | |
e6207598 | 337 | blen = uudecode(encoded, blob, sizeof(blob)); |
a306f2dd | 338 | if (blen < 0) { |
339 | fprintf(stderr, "uudecode failed.\n"); | |
340 | exit(1); | |
341 | } | |
94ec8c6b | 342 | k = private ? |
343 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 344 | key_from_blob(blob, blen); |
94ec8c6b | 345 | if (k == NULL) { |
346 | fprintf(stderr, "decode blob failed.\n"); | |
347 | exit(1); | |
348 | } | |
349 | ok = private ? | |
457fc0c6 | 350 | (k->type == KEY_DSA ? |
351 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
352 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
94ec8c6b | 353 | key_write(k, stdout); |
354 | if (!ok) { | |
355 | fprintf(stderr, "key write failed"); | |
356 | exit(1); | |
357 | } | |
a306f2dd | 358 | key_free(k); |
4ccb828d | 359 | if (!private) |
360 | fprintf(stdout, "\n"); | |
a306f2dd | 361 | fclose(fp); |
362 | exit(0); | |
363 | } | |
364 | ||
396c147e | 365 | static void |
a306f2dd | 366 | do_print_public(struct passwd *pw) |
367 | { | |
aeaa3d9e | 368 | Key *prv; |
a306f2dd | 369 | struct stat st; |
370 | ||
371 | if (!have_identity) | |
372 | ask_filename(pw, "Enter file in which the key is"); | |
373 | if (stat(identity_file, &st) < 0) { | |
374 | perror(identity_file); | |
375 | exit(1); | |
376 | } | |
abe0fb9f | 377 | prv = load_identity(identity_file); |
aeaa3d9e | 378 | if (prv == NULL) { |
a306f2dd | 379 | fprintf(stderr, "load failed\n"); |
380 | exit(1); | |
381 | } | |
aeaa3d9e | 382 | if (!key_write(prv, stdout)) |
a306f2dd | 383 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 384 | key_free(prv); |
a306f2dd | 385 | fprintf(stdout, "\n"); |
386 | exit(0); | |
387 | } | |
388 | ||
4f831fd7 | 389 | #ifdef SMARTCARD |
2b30154a | 390 | static void |
93a56445 | 391 | do_upload(struct passwd *pw, const char *sc_reader_id) |
2b30154a | 392 | { |
2b30154a | 393 | Key *prv = NULL; |
394 | struct stat st; | |
b9f62352 | 395 | int ret; |
396 | ||
2b30154a | 397 | if (!have_identity) |
398 | ask_filename(pw, "Enter file in which the key is"); | |
399 | if (stat(identity_file, &st) < 0) { | |
400 | perror(identity_file); | |
b9f62352 | 401 | exit(1); |
2b30154a | 402 | } |
403 | prv = load_identity(identity_file); | |
404 | if (prv == NULL) { | |
405 | error("load failed"); | |
b9f62352 | 406 | exit(1); |
49ccba9c | 407 | } |
b9f62352 | 408 | ret = sc_put_key(prv, sc_reader_id); |
409 | key_free(prv); | |
410 | if (ret < 0) | |
411 | exit(1); | |
412 | log("loading key done"); | |
413 | exit(0); | |
2b30154a | 414 | } |
93a56445 | 415 | |
416 | static void | |
417 | do_download(struct passwd *pw, const char *sc_reader_id) | |
418 | { | |
419 | Key *pub = NULL; | |
420 | ||
86c4f63d | 421 | pub = sc_get_key(sc_reader_id, NULL); |
93a56445 | 422 | if (pub == NULL) |
423 | fatal("cannot read public key from smartcard"); | |
424 | key_write(pub, stdout); | |
425 | key_free(pub); | |
426 | fprintf(stdout, "\n"); | |
427 | exit(0); | |
428 | } | |
3e984472 | 429 | #endif /* SMARTCARD */ |
2b30154a | 430 | |
396c147e | 431 | static void |
f095fcc7 | 432 | do_fingerprint(struct passwd *pw) |
433 | { | |
c8d54615 | 434 | FILE *f; |
a306f2dd | 435 | Key *public; |
aaf45d87 | 436 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
17a3011c | 437 | int i, skip = 0, num = 1, invalid = 1; |
438 | enum fp_rep rep; | |
439 | enum fp_type fptype; | |
5260325f | 440 | struct stat st; |
441 | ||
aeaa3d9e | 442 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
443 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 444 | |
5260325f | 445 | if (!have_identity) |
446 | ask_filename(pw, "Enter file in which the key is"); | |
447 | if (stat(identity_file, &st) < 0) { | |
448 | perror(identity_file); | |
449 | exit(1); | |
450 | } | |
aeaa3d9e | 451 | public = key_load_public(identity_file, &comment); |
452 | if (public != NULL) { | |
453 | fp = key_fingerprint(public, fptype, rep); | |
454 | printf("%d %s %s\n", key_size(public), fp, comment); | |
a306f2dd | 455 | key_free(public); |
fa08c86b | 456 | xfree(comment); |
aaf45d87 | 457 | xfree(fp); |
c8d54615 | 458 | exit(0); |
459 | } | |
aeaa3d9e | 460 | if (comment) |
461 | xfree(comment); | |
c8d54615 | 462 | |
463 | f = fopen(identity_file, "r"); | |
464 | if (f != NULL) { | |
c8d54615 | 465 | while (fgets(line, sizeof(line), f)) { |
466 | i = strlen(line) - 1; | |
467 | if (line[i] != '\n') { | |
468 | error("line %d too long: %.40s...", num, line); | |
469 | skip = 1; | |
470 | continue; | |
471 | } | |
472 | num++; | |
473 | if (skip) { | |
474 | skip = 0; | |
475 | continue; | |
476 | } | |
477 | line[i] = '\0'; | |
478 | ||
479 | /* Skip leading whitespace, empty and comment lines. */ | |
480 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
481 | ; | |
482 | if (!*cp || *cp == '\n' || *cp == '#') | |
483 | continue ; | |
484 | i = strtol(cp, &ep, 10); | |
485 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
486 | int quoted = 0; | |
487 | comment = cp; | |
488 | for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { | |
489 | if (*cp == '\\' && cp[1] == '"') | |
490 | cp++; /* Skip both */ | |
491 | else if (*cp == '"') | |
492 | quoted = !quoted; | |
493 | } | |
494 | if (!*cp) | |
495 | continue; | |
496 | *cp++ = '\0'; | |
497 | } | |
498 | ep = cp; | |
efcae5b1 | 499 | public = key_new(KEY_RSA1); |
500 | if (key_read(public, &cp) != 1) { | |
501 | cp = ep; | |
502 | key_free(public); | |
503 | public = key_new(KEY_UNSPEC); | |
504 | if (key_read(public, &cp) != 1) { | |
505 | key_free(public); | |
506 | continue; | |
507 | } | |
5260325f | 508 | } |
efcae5b1 | 509 | comment = *cp ? cp : comment; |
aeaa3d9e | 510 | fp = key_fingerprint(public, fptype, rep); |
aaf45d87 | 511 | printf("%d %s %s\n", key_size(public), fp, |
efcae5b1 | 512 | comment ? comment : "no comment"); |
aaf45d87 | 513 | xfree(fp); |
aeaa3d9e | 514 | key_free(public); |
efcae5b1 | 515 | invalid = 0; |
5260325f | 516 | } |
c8d54615 | 517 | fclose(f); |
518 | } | |
519 | if (invalid) { | |
f564d016 | 520 | printf("%s is not a public key file.\n", identity_file); |
c8d54615 | 521 | exit(1); |
5260325f | 522 | } |
5260325f | 523 | exit(0); |
f095fcc7 | 524 | } |
525 | ||
5260325f | 526 | /* |
527 | * Perform changing a passphrase. The argument is the passwd structure | |
528 | * for the current user. | |
529 | */ | |
396c147e | 530 | static void |
f095fcc7 | 531 | do_change_passphrase(struct passwd *pw) |
532 | { | |
5260325f | 533 | char *comment; |
534 | char *old_passphrase, *passphrase1, *passphrase2; | |
535 | struct stat st; | |
a306f2dd | 536 | Key *private; |
5260325f | 537 | |
538 | if (!have_identity) | |
539 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 540 | if (stat(identity_file, &st) < 0) { |
541 | perror(identity_file); | |
542 | exit(1); | |
543 | } | |
5260325f | 544 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 545 | private = key_load_private(identity_file, "", &comment); |
546 | if (private == NULL) { | |
5260325f | 547 | if (identity_passphrase) |
548 | old_passphrase = xstrdup(identity_passphrase); | |
549 | else | |
1843a425 | 550 | old_passphrase = |
551 | read_passphrase("Enter old passphrase: ", | |
552 | RP_ALLOW_STDIN); | |
553 | private = key_load_private(identity_file, old_passphrase, | |
554 | &comment); | |
aeaa3d9e | 555 | memset(old_passphrase, 0, strlen(old_passphrase)); |
556 | xfree(old_passphrase); | |
557 | if (private == NULL) { | |
5260325f | 558 | printf("Bad passphrase.\n"); |
559 | exit(1); | |
560 | } | |
5260325f | 561 | } |
562 | printf("Key has comment '%s'\n", comment); | |
563 | ||
564 | /* Ask the new passphrase (twice). */ | |
565 | if (identity_new_passphrase) { | |
566 | passphrase1 = xstrdup(identity_new_passphrase); | |
567 | passphrase2 = NULL; | |
568 | } else { | |
569 | passphrase1 = | |
1843a425 | 570 | read_passphrase("Enter new passphrase (empty for no " |
571 | "passphrase): ", RP_ALLOW_STDIN); | |
572 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
184eed6a | 573 | RP_ALLOW_STDIN); |
5260325f | 574 | |
575 | /* Verify that they are the same. */ | |
576 | if (strcmp(passphrase1, passphrase2) != 0) { | |
577 | memset(passphrase1, 0, strlen(passphrase1)); | |
578 | memset(passphrase2, 0, strlen(passphrase2)); | |
579 | xfree(passphrase1); | |
580 | xfree(passphrase2); | |
581 | printf("Pass phrases do not match. Try again.\n"); | |
582 | exit(1); | |
583 | } | |
584 | /* Destroy the other copy. */ | |
585 | memset(passphrase2, 0, strlen(passphrase2)); | |
586 | xfree(passphrase2); | |
8efc0c15 | 587 | } |
8efc0c15 | 588 | |
5260325f | 589 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 590 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 591 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 592 | memset(passphrase1, 0, strlen(passphrase1)); |
593 | xfree(passphrase1); | |
a306f2dd | 594 | key_free(private); |
5260325f | 595 | xfree(comment); |
596 | exit(1); | |
597 | } | |
598 | /* Destroy the passphrase and the copy of the key in memory. */ | |
599 | memset(passphrase1, 0, strlen(passphrase1)); | |
600 | xfree(passphrase1); | |
a306f2dd | 601 | key_free(private); /* Destroys contents */ |
5260325f | 602 | xfree(comment); |
603 | ||
604 | printf("Your identification has been saved with the new passphrase.\n"); | |
605 | exit(0); | |
606 | } | |
8efc0c15 | 607 | |
5260325f | 608 | /* |
609 | * Change the comment of a private key file. | |
610 | */ | |
396c147e | 611 | static void |
8efc0c15 | 612 | do_change_comment(struct passwd *pw) |
613 | { | |
1c9a907f | 614 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 615 | Key *private; |
616 | Key *public; | |
5260325f | 617 | struct stat st; |
618 | FILE *f; | |
1c9a907f | 619 | int fd; |
5260325f | 620 | |
621 | if (!have_identity) | |
622 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 623 | if (stat(identity_file, &st) < 0) { |
624 | perror(identity_file); | |
625 | exit(1); | |
626 | } | |
aeaa3d9e | 627 | private = key_load_private(identity_file, "", &comment); |
628 | if (private == NULL) { | |
5260325f | 629 | if (identity_passphrase) |
630 | passphrase = xstrdup(identity_passphrase); | |
631 | else if (identity_new_passphrase) | |
632 | passphrase = xstrdup(identity_new_passphrase); | |
633 | else | |
1843a425 | 634 | passphrase = read_passphrase("Enter passphrase: ", |
635 | RP_ALLOW_STDIN); | |
5260325f | 636 | /* Try to load using the passphrase. */ |
aeaa3d9e | 637 | private = key_load_private(identity_file, passphrase, &comment); |
638 | if (private == NULL) { | |
5260325f | 639 | memset(passphrase, 0, strlen(passphrase)); |
640 | xfree(passphrase); | |
641 | printf("Bad passphrase.\n"); | |
642 | exit(1); | |
643 | } | |
aeaa3d9e | 644 | } else { |
645 | passphrase = xstrdup(""); | |
5260325f | 646 | } |
aeaa3d9e | 647 | if (private->type != KEY_RSA1) { |
648 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
649 | key_free(private); | |
650 | exit(1); | |
184eed6a | 651 | } |
5260325f | 652 | printf("Key now has comment '%s'\n", comment); |
653 | ||
654 | if (identity_comment) { | |
655 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
656 | } else { | |
657 | printf("Enter new comment: "); | |
658 | fflush(stdout); | |
659 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
660 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 661 | key_free(private); |
5260325f | 662 | exit(1); |
663 | } | |
5260325f | 664 | if (strchr(new_comment, '\n')) |
665 | *strchr(new_comment, '\n') = 0; | |
666 | } | |
667 | ||
668 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 669 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
58cfa257 | 670 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 671 | memset(passphrase, 0, strlen(passphrase)); |
672 | xfree(passphrase); | |
a306f2dd | 673 | key_free(private); |
5260325f | 674 | xfree(comment); |
675 | exit(1); | |
8efc0c15 | 676 | } |
5260325f | 677 | memset(passphrase, 0, strlen(passphrase)); |
678 | xfree(passphrase); | |
aeaa3d9e | 679 | public = key_from_private(private); |
a306f2dd | 680 | key_free(private); |
5260325f | 681 | |
5260325f | 682 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 683 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
684 | if (fd == -1) { | |
5260325f | 685 | printf("Could not save your public key in %s\n", identity_file); |
686 | exit(1); | |
687 | } | |
1c9a907f | 688 | f = fdopen(fd, "w"); |
689 | if (f == NULL) { | |
690 | printf("fdopen %s failed", identity_file); | |
691 | exit(1); | |
692 | } | |
a306f2dd | 693 | if (!key_write(public, f)) |
694 | fprintf(stderr, "write key failed"); | |
695 | key_free(public); | |
696 | fprintf(f, " %s\n", new_comment); | |
5260325f | 697 | fclose(f); |
698 | ||
699 | xfree(comment); | |
700 | ||
701 | printf("The comment in your key file has been changed.\n"); | |
702 | exit(0); | |
8efc0c15 | 703 | } |
704 | ||
396c147e | 705 | static void |
5ad13cd7 | 706 | usage(void) |
707 | { | |
58153e34 | 708 | fprintf(stderr, "Usage: %s [options]\n", __progname); |
709 | fprintf(stderr, "Options:\n"); | |
710 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); | |
711 | fprintf(stderr, " -c Change comment in private and public key files.\n"); | |
712 | fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n"); | |
713 | fprintf(stderr, " -f filename Filename of the key file.\n"); | |
714 | fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n"); | |
715 | fprintf(stderr, " -l Show fingerprint of key file.\n"); | |
716 | fprintf(stderr, " -p Change passphrase of private key file.\n"); | |
717 | fprintf(stderr, " -q Quiet.\n"); | |
718 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
719 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
720 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
721 | fprintf(stderr, " -C comment Provide new comment.\n"); | |
722 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); | |
723 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
724 | #ifdef SMARTCARD | |
725 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
726 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); | |
727 | #endif /* SMARTCARD */ | |
728 | ||
5260325f | 729 | exit(1); |
5ad13cd7 | 730 | } |
731 | ||
5260325f | 732 | /* |
733 | * Main program for key management. | |
734 | */ | |
8efc0c15 | 735 | int |
736 | main(int ac, char **av) | |
737 | { | |
3dc93cd8 | 738 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
93a56445 | 739 | char *reader_id = NULL; |
1c9a907f | 740 | Key *private, *public; |
5260325f | 741 | struct passwd *pw; |
5260325f | 742 | struct stat st; |
93a56445 | 743 | int opt, type, fd, download = 0; |
5260325f | 744 | FILE *f; |
fa08c86b | 745 | |
5260325f | 746 | extern int optind; |
747 | extern char *optarg; | |
748 | ||
260d427b | 749 | __progname = get_progname(av[0]); |
264dce47 | 750 | |
fa649821 | 751 | SSLeay_add_all_algorithms(); |
a306f2dd | 752 | |
aa3378df | 753 | /* we need this for the home * directory. */ |
5260325f | 754 | pw = getpwuid(getuid()); |
755 | if (!pw) { | |
756 | printf("You don't exist, go away!\n"); | |
757 | exit(1); | |
758 | } | |
a306f2dd | 759 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
760 | perror("gethostname"); | |
761 | exit(1); | |
762 | } | |
aa3378df | 763 | |
285d2b15 | 764 | while ((opt = getopt(ac, av, "deiqpclBRxXyb:f:t:U:D:P:N:C:")) != -1) { |
5260325f | 765 | switch (opt) { |
766 | case 'b': | |
767 | bits = atoi(optarg); | |
768 | if (bits < 512 || bits > 32768) { | |
769 | printf("Bits has bad value.\n"); | |
770 | exit(1); | |
771 | } | |
772 | break; | |
5260325f | 773 | case 'l': |
774 | print_fingerprint = 1; | |
775 | break; | |
aaf45d87 | 776 | case 'B': |
777 | print_bubblebabble = 1; | |
778 | break; | |
5260325f | 779 | case 'p': |
780 | change_passphrase = 1; | |
781 | break; | |
5260325f | 782 | case 'c': |
783 | change_comment = 1; | |
784 | break; | |
5260325f | 785 | case 'f': |
786 | strlcpy(identity_file, optarg, sizeof(identity_file)); | |
787 | have_identity = 1; | |
788 | break; | |
5260325f | 789 | case 'P': |
790 | identity_passphrase = optarg; | |
791 | break; | |
5260325f | 792 | case 'N': |
793 | identity_new_passphrase = optarg; | |
794 | break; | |
5260325f | 795 | case 'C': |
796 | identity_comment = optarg; | |
797 | break; | |
5260325f | 798 | case 'q': |
799 | quiet = 1; | |
800 | break; | |
a306f2dd | 801 | case 'R': |
fa08c86b | 802 | /* unused */ |
803 | exit(0); | |
a306f2dd | 804 | break; |
5deceabb | 805 | case 'e': |
a306f2dd | 806 | case 'x': |
5deceabb | 807 | /* export key */ |
a306f2dd | 808 | convert_to_ssh2 = 1; |
809 | break; | |
5deceabb | 810 | case 'i': |
a306f2dd | 811 | case 'X': |
5deceabb | 812 | /* import key */ |
a306f2dd | 813 | convert_from_ssh2 = 1; |
814 | break; | |
a306f2dd | 815 | case 'y': |
816 | print_public = 1; | |
817 | break; | |
a306f2dd | 818 | case 'd': |
fa08c86b | 819 | key_type_name = "dsa"; |
a306f2dd | 820 | break; |
fa08c86b | 821 | case 't': |
822 | key_type_name = optarg; | |
fa08c86b | 823 | break; |
93a56445 | 824 | case 'D': |
825 | download = 1; | |
285d2b15 | 826 | case 'U': |
93a56445 | 827 | reader_id = optarg; |
2b30154a | 828 | break; |
5260325f | 829 | case '?': |
830 | default: | |
831 | usage(); | |
832 | } | |
833 | } | |
834 | if (optind < ac) { | |
835 | printf("Too many arguments.\n"); | |
836 | usage(); | |
837 | } | |
838 | if (change_passphrase && change_comment) { | |
839 | printf("Can only have one of -p and -c.\n"); | |
840 | usage(); | |
841 | } | |
aaf45d87 | 842 | if (print_fingerprint || print_bubblebabble) |
5260325f | 843 | do_fingerprint(pw); |
5260325f | 844 | if (change_passphrase) |
845 | do_change_passphrase(pw); | |
a306f2dd | 846 | if (convert_to_ssh2) |
847 | do_convert_to_ssh2(pw); | |
633151a3 | 848 | if (change_comment) |
849 | do_change_comment(pw); | |
a306f2dd | 850 | if (print_public) |
851 | do_print_public(pw); | |
93a56445 | 852 | if (reader_id != NULL) { |
4f831fd7 | 853 | #ifdef SMARTCARD |
93a56445 | 854 | if (download) |
855 | do_download(pw, reader_id); | |
856 | else | |
857 | do_upload(pw, reader_id); | |
3e984472 | 858 | #else /* SMARTCARD */ |
4f831fd7 | 859 | fatal("no support for smartcards."); |
3e984472 | 860 | #endif /* SMARTCARD */ |
93a56445 | 861 | } |
5260325f | 862 | |
8d7324af | 863 | init_rng(); |
864 | seed_rng(); | |
5260325f | 865 | arc4random_stir(); |
866 | ||
633151a3 | 867 | if (convert_from_ssh2) |
868 | do_convert_from_ssh2(pw); | |
869 | ||
bb28e836 | 870 | if (key_type_name == NULL) { |
871 | printf("You must specify a key type (-t).\n"); | |
872 | usage(); | |
873 | } | |
c523303b | 874 | type = key_type_from_name(key_type_name); |
875 | if (type == KEY_UNSPEC) { | |
876 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
877 | exit(1); | |
a306f2dd | 878 | } |
fa08c86b | 879 | if (!quiet) |
c523303b | 880 | printf("Generating public/private %s key pair.\n", key_type_name); |
fa08c86b | 881 | private = key_generate(type, bits); |
882 | if (private == NULL) { | |
883 | fprintf(stderr, "key_generate failed"); | |
884 | exit(1); | |
885 | } | |
886 | public = key_from_private(private); | |
5260325f | 887 | |
888 | if (!have_identity) | |
889 | ask_filename(pw, "Enter file in which to save the key"); | |
890 | ||
891 | /* Create ~/.ssh directory if it doesn\'t already exist. */ | |
42f11eb2 | 892 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 893 | if (strstr(identity_file, dotsshdir) != NULL && |
894 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 895 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 896 | error("Could not create directory '%s'.", dotsshdir); |
897 | else if (!quiet) | |
898 | printf("Created directory '%s'.\n", dotsshdir); | |
899 | } | |
900 | /* If the file already exists, ask the user to confirm. */ | |
901 | if (stat(identity_file, &st) >= 0) { | |
902 | char yesno[3]; | |
903 | printf("%s already exists.\n", identity_file); | |
904 | printf("Overwrite (y/n)? "); | |
905 | fflush(stdout); | |
906 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
907 | exit(1); | |
908 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
909 | exit(1); | |
910 | } | |
911 | /* Ask for a passphrase (twice). */ | |
912 | if (identity_passphrase) | |
913 | passphrase1 = xstrdup(identity_passphrase); | |
914 | else if (identity_new_passphrase) | |
915 | passphrase1 = xstrdup(identity_new_passphrase); | |
916 | else { | |
917 | passphrase_again: | |
918 | passphrase1 = | |
1843a425 | 919 | read_passphrase("Enter passphrase (empty for no " |
920 | "passphrase): ", RP_ALLOW_STDIN); | |
921 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
922 | RP_ALLOW_STDIN); | |
5260325f | 923 | if (strcmp(passphrase1, passphrase2) != 0) { |
1843a425 | 924 | /* |
925 | * The passphrases do not match. Clear them and | |
926 | * retry. | |
927 | */ | |
5260325f | 928 | memset(passphrase1, 0, strlen(passphrase1)); |
929 | memset(passphrase2, 0, strlen(passphrase2)); | |
930 | xfree(passphrase1); | |
931 | xfree(passphrase2); | |
932 | printf("Passphrases do not match. Try again.\n"); | |
933 | goto passphrase_again; | |
934 | } | |
935 | /* Clear the other copy of the passphrase. */ | |
936 | memset(passphrase2, 0, strlen(passphrase2)); | |
937 | xfree(passphrase2); | |
938 | } | |
939 | ||
5260325f | 940 | if (identity_comment) { |
941 | strlcpy(comment, identity_comment, sizeof(comment)); | |
942 | } else { | |
6ae2364d | 943 | /* Create default commend field for the passphrase. */ |
5260325f | 944 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
945 | } | |
946 | ||
947 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 948 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 949 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 950 | memset(passphrase1, 0, strlen(passphrase1)); |
951 | xfree(passphrase1); | |
952 | exit(1); | |
953 | } | |
954 | /* Clear the passphrase. */ | |
955 | memset(passphrase1, 0, strlen(passphrase1)); | |
956 | xfree(passphrase1); | |
957 | ||
958 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 959 | key_free(private); |
5260325f | 960 | arc4random_stir(); |
961 | ||
962 | if (!quiet) | |
963 | printf("Your identification has been saved in %s.\n", identity_file); | |
964 | ||
5260325f | 965 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 966 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
967 | if (fd == -1) { | |
5260325f | 968 | printf("Could not save your public key in %s\n", identity_file); |
969 | exit(1); | |
970 | } | |
1c9a907f | 971 | f = fdopen(fd, "w"); |
972 | if (f == NULL) { | |
973 | printf("fdopen %s failed", identity_file); | |
974 | exit(1); | |
975 | } | |
a306f2dd | 976 | if (!key_write(public, f)) |
977 | fprintf(stderr, "write key failed"); | |
978 | fprintf(f, " %s\n", comment); | |
5260325f | 979 | fclose(f); |
980 | ||
981 | if (!quiet) { | |
22138a36 | 982 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 983 | printf("Your public key has been saved in %s.\n", |
984 | identity_file); | |
5260325f | 985 | printf("The key fingerprint is:\n"); |
22138a36 | 986 | printf("%s %s\n", fp, comment); |
987 | xfree(fp); | |
8efc0c15 | 988 | } |
a306f2dd | 989 | |
990 | key_free(public); | |
5260325f | 991 | exit(0); |
8efc0c15 | 992 | } |