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2ccf5424 | 1 | /* $OpenBSD: ssh-keygen.c,v 1.143 2006/03/30 11:05:17 dtucker Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
4 | * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
5 | * All rights reserved | |
5260325f | 6 | * Identity and host key generation and maintenance. |
bcbf86ec | 7 | * |
8 | * As far as I am concerned, the code I have written for this software | |
9 | * can be used freely for any purpose. Any derived versions of this | |
10 | * software must be clearly marked as such, and if the derived work is | |
11 | * incompatible with the protocol description in the RFC file, it must be | |
12 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 13 | */ |
8efc0c15 | 14 | |
15 | #include "includes.h" | |
4095f623 | 16 | |
17 | #include <sys/types.h> | |
18 | #include <sys/stat.h> | |
8efc0c15 | 19 | |
a306f2dd | 20 | #include <openssl/evp.h> |
21 | #include <openssl/pem.h> | |
a306f2dd | 22 | |
8efc0c15 | 23 | #include "xmalloc.h" |
a306f2dd | 24 | #include "key.h" |
457fc0c6 | 25 | #include "rsa.h" |
a306f2dd | 26 | #include "authfile.h" |
27 | #include "uuencode.h" | |
94ec8c6b | 28 | #include "buffer.h" |
29 | #include "bufaux.h" | |
42f11eb2 | 30 | #include "pathnames.h" |
31 | #include "log.h" | |
58ae9cb8 | 32 | #include "misc.h" |
bdffbcdc | 33 | #include "match.h" |
34 | #include "hostfile.h" | |
94ec8c6b | 35 | |
93a56445 | 36 | #ifdef SMARTCARD |
93a56445 | 37 | #include "scard.h" |
dd2495cb | 38 | #endif |
02159d9b | 39 | #include "dns.h" |
2b30154a | 40 | |
255d3e00 | 41 | /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ |
42 | #define DEFAULT_BITS 2048 | |
43 | #define DEFAULT_BITS_DSA 1024 | |
44 | u_int32_t bits = 0; | |
8efc0c15 | 45 | |
aa3378df | 46 | /* |
47 | * Flag indicating that we just want to change the passphrase. This can be | |
48 | * set on the command line. | |
49 | */ | |
8efc0c15 | 50 | int change_passphrase = 0; |
51 | ||
aa3378df | 52 | /* |
53 | * Flag indicating that we just want to change the comment. This can be set | |
54 | * on the command line. | |
55 | */ | |
8efc0c15 | 56 | int change_comment = 0; |
57 | ||
58 | int quiet = 0; | |
59 | ||
bdffbcdc | 60 | /* Flag indicating that we want to hash a known_hosts file */ |
61 | int hash_hosts = 0; | |
62 | /* Flag indicating that we want lookup a host in known_hosts file */ | |
63 | int find_host = 0; | |
64 | /* Flag indicating that we want to delete a host from a known_hosts file */ | |
65 | int delete_host = 0; | |
66 | ||
f095fcc7 | 67 | /* Flag indicating that we just want to see the key fingerprint */ |
68 | int print_fingerprint = 0; | |
aaf45d87 | 69 | int print_bubblebabble = 0; |
f095fcc7 | 70 | |
5ad13cd7 | 71 | /* The identity file name, given on the command line or entered by the user. */ |
72 | char identity_file[1024]; | |
73 | int have_identity = 0; | |
8efc0c15 | 74 | |
75 | /* This is set to the passphrase if given on the command line. */ | |
76 | char *identity_passphrase = NULL; | |
77 | ||
78 | /* This is set to the new passphrase if given on the command line. */ | |
79 | char *identity_new_passphrase = NULL; | |
80 | ||
81 | /* This is set to the new comment if given on the command line. */ | |
82 | char *identity_comment = NULL; | |
83 | ||
a306f2dd | 84 | /* Dump public key file in format used by real and the original SSH 2 */ |
85 | int convert_to_ssh2 = 0; | |
86 | int convert_from_ssh2 = 0; | |
87 | int print_public = 0; | |
21289cd0 | 88 | int print_generic = 0; |
fa08c86b | 89 | |
3dc93cd8 | 90 | char *key_type_name = NULL; |
a306f2dd | 91 | |
5ad13cd7 | 92 | /* argv0 */ |
93 | extern char *__progname; | |
8efc0c15 | 94 | |
a306f2dd | 95 | char hostname[MAXHOSTNAMELEN]; |
96 | ||
20eea1d7 | 97 | /* moduli.c */ |
c784ae09 | 98 | int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
20eea1d7 | 99 | int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
100 | ||
396c147e | 101 | static void |
5ad13cd7 | 102 | ask_filename(struct passwd *pw, const char *prompt) |
8efc0c15 | 103 | { |
5260325f | 104 | char buf[1024]; |
c523303b | 105 | char *name = NULL; |
106 | ||
8d22d775 | 107 | if (key_type_name == NULL) |
42f11eb2 | 108 | name = _PATH_SSH_CLIENT_ID_RSA; |
32596c7b | 109 | else { |
8d22d775 | 110 | switch (key_type_from_name(key_type_name)) { |
111 | case KEY_RSA1: | |
112 | name = _PATH_SSH_CLIENT_IDENTITY; | |
113 | break; | |
114 | case KEY_DSA: | |
115 | name = _PATH_SSH_CLIENT_ID_DSA; | |
116 | break; | |
117 | case KEY_RSA: | |
118 | name = _PATH_SSH_CLIENT_ID_RSA; | |
119 | break; | |
120 | default: | |
121 | fprintf(stderr, "bad key type"); | |
122 | exit(1); | |
123 | break; | |
124 | } | |
32596c7b | 125 | } |
c523303b | 126 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
8d88011e | 127 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
5260325f | 128 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
129 | exit(1); | |
130 | if (strchr(buf, '\n')) | |
131 | *strchr(buf, '\n') = 0; | |
132 | if (strcmp(buf, "") != 0) | |
133 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
134 | have_identity = 1; | |
f095fcc7 | 135 | } |
8efc0c15 | 136 | |
396c147e | 137 | static Key * |
abe0fb9f | 138 | load_identity(char *filename) |
a306f2dd | 139 | { |
aeaa3d9e | 140 | char *pass; |
141 | Key *prv; | |
142 | ||
cd332296 | 143 | prv = key_load_private(filename, "", NULL); |
aeaa3d9e | 144 | if (prv == NULL) { |
abe0fb9f | 145 | if (identity_passphrase) |
146 | pass = xstrdup(identity_passphrase); | |
147 | else | |
1843a425 | 148 | pass = read_passphrase("Enter passphrase: ", |
149 | RP_ALLOW_STDIN); | |
aeaa3d9e | 150 | prv = key_load_private(filename, pass, NULL); |
a306f2dd | 151 | memset(pass, 0, strlen(pass)); |
152 | xfree(pass); | |
153 | } | |
aeaa3d9e | 154 | return prv; |
a306f2dd | 155 | } |
156 | ||
94ec8c6b | 157 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
7203d6bb | 158 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
94ec8c6b | 159 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
2b87da3b | 160 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 161 | |
396c147e | 162 | static void |
a306f2dd | 163 | do_convert_to_ssh2(struct passwd *pw) |
164 | { | |
b587c165 | 165 | Key *k; |
21b30f38 | 166 | u_int len; |
1e3b8b07 | 167 | u_char *blob; |
a306f2dd | 168 | struct stat st; |
169 | ||
170 | if (!have_identity) | |
171 | ask_filename(pw, "Enter file in which the key is"); | |
172 | if (stat(identity_file, &st) < 0) { | |
173 | perror(identity_file); | |
174 | exit(1); | |
175 | } | |
b587c165 | 176 | if ((k = key_load_public(identity_file, NULL)) == NULL) { |
abe0fb9f | 177 | if ((k = load_identity(identity_file)) == NULL) { |
b587c165 | 178 | fprintf(stderr, "load failed\n"); |
179 | exit(1); | |
180 | } | |
a306f2dd | 181 | } |
3566c73c | 182 | if (k->type == KEY_RSA1) { |
183 | fprintf(stderr, "version 1 keys are not supported\n"); | |
184 | exit(1); | |
185 | } | |
f7436b8c | 186 | if (key_to_blob(k, &blob, &len) <= 0) { |
187 | fprintf(stderr, "key_to_blob failed\n"); | |
188 | exit(1); | |
189 | } | |
94ec8c6b | 190 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 191 | fprintf(stdout, |
512df038 | 192 | "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", |
b587c165 | 193 | key_size(k), key_type(k), |
a306f2dd | 194 | pw->pw_name, hostname); |
195 | dump_base64(stdout, blob, len); | |
94ec8c6b | 196 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
b587c165 | 197 | key_free(k); |
a306f2dd | 198 | xfree(blob); |
199 | exit(0); | |
200 | } | |
201 | ||
396c147e | 202 | static void |
94ec8c6b | 203 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
204 | { | |
ca75d7de | 205 | u_int bignum_bits = buffer_get_int(b); |
206 | u_int bytes = (bignum_bits + 7) / 8; | |
457fc0c6 | 207 | |
94ec8c6b | 208 | if (buffer_len(b) < bytes) |
457fc0c6 | 209 | fatal("buffer_get_bignum_bits: input buffer too small: " |
210 | "need %d have %d", bytes, buffer_len(b)); | |
20905a8e | 211 | BN_bin2bn(buffer_ptr(b), bytes, value); |
94ec8c6b | 212 | buffer_consume(b, bytes); |
213 | } | |
214 | ||
396c147e | 215 | static Key * |
c66f9d0e | 216 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
94ec8c6b | 217 | { |
218 | Buffer b; | |
94ec8c6b | 219 | Key *key = NULL; |
a599bd06 | 220 | char *type, *cipher; |
d3260e12 | 221 | u_char *sig, data[] = "abcde12345"; |
2e0becb6 | 222 | int magic, rlen, ktype, i1, i2, i3, i4; |
a599bd06 | 223 | u_int slen; |
2e0becb6 | 224 | u_long e; |
94ec8c6b | 225 | |
226 | buffer_init(&b); | |
227 | buffer_append(&b, blob, blen); | |
228 | ||
229 | magic = buffer_get_int(&b); | |
230 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
231 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
232 | buffer_free(&b); | |
233 | return NULL; | |
234 | } | |
2e0becb6 | 235 | i1 = buffer_get_int(&b); |
94ec8c6b | 236 | type = buffer_get_string(&b, NULL); |
237 | cipher = buffer_get_string(&b, NULL); | |
2e0becb6 | 238 | i2 = buffer_get_int(&b); |
239 | i3 = buffer_get_int(&b); | |
240 | i4 = buffer_get_int(&b); | |
241 | debug("ignore (%d %d %d %d)", i1,i2,i3,i4); | |
94ec8c6b | 242 | if (strcmp(cipher, "none") != 0) { |
243 | error("unsupported cipher %s", cipher); | |
244 | xfree(cipher); | |
245 | buffer_free(&b); | |
457fc0c6 | 246 | xfree(type); |
94ec8c6b | 247 | return NULL; |
248 | } | |
249 | xfree(cipher); | |
250 | ||
457fc0c6 | 251 | if (strstr(type, "dsa")) { |
252 | ktype = KEY_DSA; | |
253 | } else if (strstr(type, "rsa")) { | |
254 | ktype = KEY_RSA; | |
255 | } else { | |
3c460ede | 256 | buffer_free(&b); |
457fc0c6 | 257 | xfree(type); |
94ec8c6b | 258 | return NULL; |
259 | } | |
457fc0c6 | 260 | key = key_new_private(ktype); |
261 | xfree(type); | |
262 | ||
263 | switch (key->type) { | |
264 | case KEY_DSA: | |
265 | buffer_get_bignum_bits(&b, key->dsa->p); | |
266 | buffer_get_bignum_bits(&b, key->dsa->g); | |
267 | buffer_get_bignum_bits(&b, key->dsa->q); | |
268 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
269 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
270 | break; | |
271 | case KEY_RSA: | |
2e0becb6 | 272 | e = buffer_get_char(&b); |
273 | debug("e %lx", e); | |
274 | if (e < 30) { | |
275 | e <<= 8; | |
276 | e += buffer_get_char(&b); | |
277 | debug("e %lx", e); | |
278 | e <<= 8; | |
279 | e += buffer_get_char(&b); | |
280 | debug("e %lx", e); | |
281 | } | |
282 | if (!BN_set_word(key->rsa->e, e)) { | |
457fc0c6 | 283 | buffer_free(&b); |
284 | key_free(key); | |
285 | return NULL; | |
286 | } | |
287 | buffer_get_bignum_bits(&b, key->rsa->d); | |
288 | buffer_get_bignum_bits(&b, key->rsa->n); | |
289 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
290 | buffer_get_bignum_bits(&b, key->rsa->q); | |
291 | buffer_get_bignum_bits(&b, key->rsa->p); | |
2b63e803 | 292 | rsa_generate_additional_parameters(key->rsa); |
457fc0c6 | 293 | break; |
294 | } | |
94ec8c6b | 295 | rlen = buffer_len(&b); |
6aacefa7 | 296 | if (rlen != 0) |
457fc0c6 | 297 | error("do_convert_private_ssh2_from_blob: " |
298 | "remaining bytes in key blob %d", rlen); | |
94ec8c6b | 299 | buffer_free(&b); |
a599bd06 | 300 | |
301 | /* try the key */ | |
302 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
303 | key_verify(key, sig, slen, data, sizeof(data)); | |
304 | xfree(sig); | |
94ec8c6b | 305 | return key; |
306 | } | |
307 | ||
15b81af3 | 308 | static int |
309 | get_line(FILE *fp, char *line, size_t len) | |
310 | { | |
311 | int c; | |
312 | size_t pos = 0; | |
313 | ||
314 | line[0] = '\0'; | |
315 | while ((c = fgetc(fp)) != EOF) { | |
316 | if (pos >= len - 1) { | |
317 | fprintf(stderr, "input line too long.\n"); | |
318 | exit(1); | |
319 | } | |
32596c7b | 320 | switch (c) { |
15b81af3 | 321 | case '\r': |
322 | c = fgetc(fp); | |
323 | if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { | |
324 | fprintf(stderr, "unget: %s\n", strerror(errno)); | |
325 | exit(1); | |
326 | } | |
327 | return pos; | |
328 | case '\n': | |
329 | return pos; | |
330 | } | |
331 | line[pos++] = c; | |
332 | line[pos] = '\0'; | |
333 | } | |
2ccf5424 | 334 | if (c == EOF) |
335 | return -1; | |
15b81af3 | 336 | return pos; |
337 | } | |
338 | ||
396c147e | 339 | static void |
a306f2dd | 340 | do_convert_from_ssh2(struct passwd *pw) |
341 | { | |
342 | Key *k; | |
343 | int blen; | |
783dbbdc | 344 | u_int len; |
15b81af3 | 345 | char line[1024]; |
cf54363d | 346 | u_char blob[8096]; |
a306f2dd | 347 | char encoded[8096]; |
348 | struct stat st; | |
94ec8c6b | 349 | int escaped = 0, private = 0, ok; |
a306f2dd | 350 | FILE *fp; |
351 | ||
352 | if (!have_identity) | |
353 | ask_filename(pw, "Enter file in which the key is"); | |
354 | if (stat(identity_file, &st) < 0) { | |
355 | perror(identity_file); | |
356 | exit(1); | |
357 | } | |
358 | fp = fopen(identity_file, "r"); | |
359 | if (fp == NULL) { | |
360 | perror(identity_file); | |
361 | exit(1); | |
362 | } | |
363 | encoded[0] = '\0'; | |
15b81af3 | 364 | while ((blen = get_line(fp, line, sizeof(line))) != -1) { |
365 | if (line[blen - 1] == '\\') | |
d0c832f3 | 366 | escaped++; |
a306f2dd | 367 | if (strncmp(line, "----", 4) == 0 || |
368 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 369 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
370 | private = 1; | |
a599bd06 | 371 | if (strstr(line, " END ") != NULL) { |
372 | break; | |
373 | } | |
012bc0e1 | 374 | /* fprintf(stderr, "ignore: %s", line); */ |
a306f2dd | 375 | continue; |
376 | } | |
d0c832f3 | 377 | if (escaped) { |
378 | escaped--; | |
012bc0e1 | 379 | /* fprintf(stderr, "escaped: %s", line); */ |
d0c832f3 | 380 | continue; |
a306f2dd | 381 | } |
a306f2dd | 382 | strlcat(encoded, line, sizeof(encoded)); |
383 | } | |
783dbbdc | 384 | len = strlen(encoded); |
385 | if (((len % 4) == 3) && | |
386 | (encoded[len-1] == '=') && | |
387 | (encoded[len-2] == '=') && | |
388 | (encoded[len-3] == '=')) | |
389 | encoded[len-3] = '\0'; | |
e6207598 | 390 | blen = uudecode(encoded, blob, sizeof(blob)); |
a306f2dd | 391 | if (blen < 0) { |
392 | fprintf(stderr, "uudecode failed.\n"); | |
393 | exit(1); | |
394 | } | |
94ec8c6b | 395 | k = private ? |
396 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 397 | key_from_blob(blob, blen); |
94ec8c6b | 398 | if (k == NULL) { |
399 | fprintf(stderr, "decode blob failed.\n"); | |
400 | exit(1); | |
401 | } | |
402 | ok = private ? | |
457fc0c6 | 403 | (k->type == KEY_DSA ? |
404 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
405 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
94ec8c6b | 406 | key_write(k, stdout); |
407 | if (!ok) { | |
408 | fprintf(stderr, "key write failed"); | |
409 | exit(1); | |
410 | } | |
a306f2dd | 411 | key_free(k); |
4ccb828d | 412 | if (!private) |
413 | fprintf(stdout, "\n"); | |
a306f2dd | 414 | fclose(fp); |
415 | exit(0); | |
416 | } | |
417 | ||
396c147e | 418 | static void |
a306f2dd | 419 | do_print_public(struct passwd *pw) |
420 | { | |
aeaa3d9e | 421 | Key *prv; |
a306f2dd | 422 | struct stat st; |
423 | ||
424 | if (!have_identity) | |
425 | ask_filename(pw, "Enter file in which the key is"); | |
426 | if (stat(identity_file, &st) < 0) { | |
427 | perror(identity_file); | |
428 | exit(1); | |
429 | } | |
abe0fb9f | 430 | prv = load_identity(identity_file); |
aeaa3d9e | 431 | if (prv == NULL) { |
a306f2dd | 432 | fprintf(stderr, "load failed\n"); |
433 | exit(1); | |
434 | } | |
aeaa3d9e | 435 | if (!key_write(prv, stdout)) |
a306f2dd | 436 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 437 | key_free(prv); |
a306f2dd | 438 | fprintf(stdout, "\n"); |
439 | exit(0); | |
440 | } | |
441 | ||
4f831fd7 | 442 | #ifdef SMARTCARD |
2b30154a | 443 | static void |
93a56445 | 444 | do_upload(struct passwd *pw, const char *sc_reader_id) |
2b30154a | 445 | { |
2b30154a | 446 | Key *prv = NULL; |
447 | struct stat st; | |
b9f62352 | 448 | int ret; |
449 | ||
2b30154a | 450 | if (!have_identity) |
451 | ask_filename(pw, "Enter file in which the key is"); | |
452 | if (stat(identity_file, &st) < 0) { | |
453 | perror(identity_file); | |
b9f62352 | 454 | exit(1); |
2b30154a | 455 | } |
456 | prv = load_identity(identity_file); | |
457 | if (prv == NULL) { | |
458 | error("load failed"); | |
b9f62352 | 459 | exit(1); |
49ccba9c | 460 | } |
b9f62352 | 461 | ret = sc_put_key(prv, sc_reader_id); |
462 | key_free(prv); | |
463 | if (ret < 0) | |
464 | exit(1); | |
bbe88b6d | 465 | logit("loading key done"); |
b9f62352 | 466 | exit(0); |
2b30154a | 467 | } |
93a56445 | 468 | |
469 | static void | |
470 | do_download(struct passwd *pw, const char *sc_reader_id) | |
471 | { | |
0659cace | 472 | Key **keys = NULL; |
473 | int i; | |
93a56445 | 474 | |
0659cace | 475 | keys = sc_get_keys(sc_reader_id, NULL); |
476 | if (keys == NULL) | |
93a56445 | 477 | fatal("cannot read public key from smartcard"); |
0659cace | 478 | for (i = 0; keys[i]; i++) { |
479 | key_write(keys[i], stdout); | |
480 | key_free(keys[i]); | |
481 | fprintf(stdout, "\n"); | |
482 | } | |
483 | xfree(keys); | |
93a56445 | 484 | exit(0); |
485 | } | |
3e984472 | 486 | #endif /* SMARTCARD */ |
2b30154a | 487 | |
396c147e | 488 | static void |
f095fcc7 | 489 | do_fingerprint(struct passwd *pw) |
490 | { | |
c8d54615 | 491 | FILE *f; |
a306f2dd | 492 | Key *public; |
aaf45d87 | 493 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
17a3011c | 494 | int i, skip = 0, num = 1, invalid = 1; |
495 | enum fp_rep rep; | |
496 | enum fp_type fptype; | |
5260325f | 497 | struct stat st; |
498 | ||
aeaa3d9e | 499 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
500 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 501 | |
5260325f | 502 | if (!have_identity) |
503 | ask_filename(pw, "Enter file in which the key is"); | |
504 | if (stat(identity_file, &st) < 0) { | |
505 | perror(identity_file); | |
506 | exit(1); | |
507 | } | |
aeaa3d9e | 508 | public = key_load_public(identity_file, &comment); |
509 | if (public != NULL) { | |
510 | fp = key_fingerprint(public, fptype, rep); | |
512df038 | 511 | printf("%u %s %s\n", key_size(public), fp, comment); |
a306f2dd | 512 | key_free(public); |
fa08c86b | 513 | xfree(comment); |
aaf45d87 | 514 | xfree(fp); |
c8d54615 | 515 | exit(0); |
516 | } | |
aeaa3d9e | 517 | if (comment) |
518 | xfree(comment); | |
c8d54615 | 519 | |
520 | f = fopen(identity_file, "r"); | |
521 | if (f != NULL) { | |
c8d54615 | 522 | while (fgets(line, sizeof(line), f)) { |
523 | i = strlen(line) - 1; | |
524 | if (line[i] != '\n') { | |
525 | error("line %d too long: %.40s...", num, line); | |
526 | skip = 1; | |
527 | continue; | |
528 | } | |
529 | num++; | |
530 | if (skip) { | |
531 | skip = 0; | |
532 | continue; | |
533 | } | |
534 | line[i] = '\0'; | |
535 | ||
536 | /* Skip leading whitespace, empty and comment lines. */ | |
537 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
538 | ; | |
539 | if (!*cp || *cp == '\n' || *cp == '#') | |
540 | continue ; | |
541 | i = strtol(cp, &ep, 10); | |
542 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
543 | int quoted = 0; | |
544 | comment = cp; | |
512df038 | 545 | for (; *cp && (quoted || (*cp != ' ' && |
546 | *cp != '\t')); cp++) { | |
c8d54615 | 547 | if (*cp == '\\' && cp[1] == '"') |
548 | cp++; /* Skip both */ | |
549 | else if (*cp == '"') | |
550 | quoted = !quoted; | |
551 | } | |
552 | if (!*cp) | |
553 | continue; | |
554 | *cp++ = '\0'; | |
555 | } | |
556 | ep = cp; | |
efcae5b1 | 557 | public = key_new(KEY_RSA1); |
558 | if (key_read(public, &cp) != 1) { | |
559 | cp = ep; | |
560 | key_free(public); | |
561 | public = key_new(KEY_UNSPEC); | |
562 | if (key_read(public, &cp) != 1) { | |
563 | key_free(public); | |
564 | continue; | |
565 | } | |
5260325f | 566 | } |
efcae5b1 | 567 | comment = *cp ? cp : comment; |
aeaa3d9e | 568 | fp = key_fingerprint(public, fptype, rep); |
512df038 | 569 | printf("%u %s %s\n", key_size(public), fp, |
efcae5b1 | 570 | comment ? comment : "no comment"); |
aaf45d87 | 571 | xfree(fp); |
aeaa3d9e | 572 | key_free(public); |
efcae5b1 | 573 | invalid = 0; |
5260325f | 574 | } |
c8d54615 | 575 | fclose(f); |
576 | } | |
577 | if (invalid) { | |
f564d016 | 578 | printf("%s is not a public key file.\n", identity_file); |
c8d54615 | 579 | exit(1); |
5260325f | 580 | } |
5260325f | 581 | exit(0); |
f095fcc7 | 582 | } |
583 | ||
bdffbcdc | 584 | static void |
585 | print_host(FILE *f, char *name, Key *public, int hash) | |
586 | { | |
587 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
588 | fatal("hash_host failed"); | |
589 | fprintf(f, "%s ", name); | |
590 | if (!key_write(public, f)) | |
591 | fatal("key_write failed"); | |
592 | fprintf(f, "\n"); | |
593 | } | |
594 | ||
595 | static void | |
596 | do_known_hosts(struct passwd *pw, const char *name) | |
597 | { | |
598 | FILE *in, *out = stdout; | |
599 | Key *public; | |
600 | char *cp, *cp2, *kp, *kp2; | |
601 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
602 | int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; | |
603 | ||
604 | if (!have_identity) { | |
605 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
606 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
607 | sizeof(identity_file)) | |
608 | fatal("Specified known hosts path too long"); | |
609 | xfree(cp); | |
610 | have_identity = 1; | |
611 | } | |
612 | if ((in = fopen(identity_file, "r")) == NULL) | |
613 | fatal("fopen: %s", strerror(errno)); | |
614 | ||
615 | /* | |
616 | * Find hosts goes to stdout, hash and deletions happen in-place | |
617 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
618 | */ | |
619 | if (!find_host && (hash_hosts || delete_host)) { | |
620 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
621 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
622 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
623 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
624 | fatal("known_hosts path too long"); | |
625 | umask(077); | |
626 | if ((c = mkstemp(tmp)) == -1) | |
627 | fatal("mkstemp: %s", strerror(errno)); | |
628 | if ((out = fdopen(c, "w")) == NULL) { | |
629 | c = errno; | |
630 | unlink(tmp); | |
631 | fatal("fdopen: %s", strerror(c)); | |
632 | } | |
633 | inplace = 1; | |
634 | } | |
635 | ||
636 | while (fgets(line, sizeof(line), in)) { | |
637 | num++; | |
638 | i = strlen(line) - 1; | |
639 | if (line[i] != '\n') { | |
640 | error("line %d too long: %.40s...", num, line); | |
641 | skip = 1; | |
642 | invalid = 1; | |
643 | continue; | |
644 | } | |
645 | if (skip) { | |
646 | skip = 0; | |
647 | continue; | |
648 | } | |
649 | line[i] = '\0'; | |
650 | ||
651 | /* Skip leading whitespace, empty and comment lines. */ | |
652 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
653 | ; | |
654 | if (!*cp || *cp == '\n' || *cp == '#') { | |
655 | if (inplace) | |
656 | fprintf(out, "%s\n", cp); | |
657 | continue; | |
658 | } | |
659 | /* Find the end of the host name portion. */ | |
660 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
661 | ; | |
662 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
663 | error("line %d missing key: %.40s...", | |
664 | num, line); | |
665 | invalid = 1; | |
666 | continue; | |
667 | } | |
668 | *kp++ = '\0'; | |
669 | kp2 = kp; | |
670 | ||
671 | public = key_new(KEY_RSA1); | |
672 | if (key_read(public, &kp) != 1) { | |
673 | kp = kp2; | |
674 | key_free(public); | |
675 | public = key_new(KEY_UNSPEC); | |
676 | if (key_read(public, &kp) != 1) { | |
677 | error("line %d invalid key: %.40s...", | |
678 | num, line); | |
679 | key_free(public); | |
680 | invalid = 1; | |
681 | continue; | |
682 | } | |
683 | } | |
684 | ||
685 | if (*cp == HASH_DELIM) { | |
686 | if (find_host || delete_host) { | |
687 | cp2 = host_hash(name, cp, strlen(cp)); | |
688 | if (cp2 == NULL) { | |
689 | error("line %d: invalid hashed " | |
690 | "name: %.64s...", num, line); | |
691 | invalid = 1; | |
692 | continue; | |
693 | } | |
694 | c = (strcmp(cp2, cp) == 0); | |
695 | if (find_host && c) { | |
696 | printf("# Host %s found: " | |
697 | "line %d type %s\n", name, | |
698 | num, key_type(public)); | |
699 | print_host(out, cp, public, 0); | |
700 | } | |
701 | if (delete_host && !c) | |
702 | print_host(out, cp, public, 0); | |
703 | } else if (hash_hosts) | |
704 | print_host(out, cp, public, 0); | |
705 | } else { | |
706 | if (find_host || delete_host) { | |
707 | c = (match_hostname(name, cp, | |
708 | strlen(cp)) == 1); | |
709 | if (find_host && c) { | |
710 | printf("# Host %s found: " | |
711 | "line %d type %s\n", name, | |
712 | num, key_type(public)); | |
713 | print_host(out, cp, public, hash_hosts); | |
714 | } | |
715 | if (delete_host && !c) | |
716 | print_host(out, cp, public, 0); | |
717 | } else if (hash_hosts) { | |
f8cc7664 | 718 | for (cp2 = strsep(&cp, ","); |
bdffbcdc | 719 | cp2 != NULL && *cp2 != '\0'; |
bc7119ba | 720 | cp2 = strsep(&cp, ",")) { |
721 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
722 | fprintf(stderr, "Warning: " | |
723 | "ignoring host name with " | |
724 | "metacharacters: %.64s\n", | |
725 | cp2); | |
726 | else | |
727 | print_host(out, cp2, public, 1); | |
728 | } | |
bdffbcdc | 729 | has_unhashed = 1; |
730 | } | |
731 | } | |
732 | key_free(public); | |
733 | } | |
734 | fclose(in); | |
735 | ||
736 | if (invalid) { | |
737 | fprintf(stderr, "%s is not a valid known_host file.\n", | |
738 | identity_file); | |
739 | if (inplace) { | |
740 | fprintf(stderr, "Not replacing existing known_hosts " | |
604dac32 | 741 | "file because of errors\n"); |
bdffbcdc | 742 | fclose(out); |
743 | unlink(tmp); | |
744 | } | |
745 | exit(1); | |
746 | } | |
747 | ||
748 | if (inplace) { | |
749 | fclose(out); | |
750 | ||
751 | /* Backup existing file */ | |
752 | if (unlink(old) == -1 && errno != ENOENT) | |
753 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
754 | if (link(identity_file, old) == -1) | |
755 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
756 | strerror(errno)); | |
757 | /* Move new one into place */ | |
758 | if (rename(tmp, identity_file) == -1) { | |
759 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
760 | strerror(errno)); | |
761 | unlink(tmp); | |
762 | unlink(old); | |
763 | exit(1); | |
764 | } | |
765 | ||
766 | fprintf(stderr, "%s updated.\n", identity_file); | |
767 | fprintf(stderr, "Original contents retained as %s\n", old); | |
768 | if (has_unhashed) { | |
769 | fprintf(stderr, "WARNING: %s contains unhashed " | |
770 | "entries\n", old); | |
771 | fprintf(stderr, "Delete this file to ensure privacy " | |
4e2e5cfd | 772 | "of hostnames\n"); |
bdffbcdc | 773 | } |
774 | } | |
775 | ||
776 | exit(0); | |
777 | } | |
778 | ||
5260325f | 779 | /* |
780 | * Perform changing a passphrase. The argument is the passwd structure | |
781 | * for the current user. | |
782 | */ | |
396c147e | 783 | static void |
f095fcc7 | 784 | do_change_passphrase(struct passwd *pw) |
785 | { | |
5260325f | 786 | char *comment; |
787 | char *old_passphrase, *passphrase1, *passphrase2; | |
788 | struct stat st; | |
a306f2dd | 789 | Key *private; |
5260325f | 790 | |
791 | if (!have_identity) | |
792 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 793 | if (stat(identity_file, &st) < 0) { |
794 | perror(identity_file); | |
795 | exit(1); | |
796 | } | |
5260325f | 797 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 798 | private = key_load_private(identity_file, "", &comment); |
799 | if (private == NULL) { | |
5260325f | 800 | if (identity_passphrase) |
801 | old_passphrase = xstrdup(identity_passphrase); | |
802 | else | |
1843a425 | 803 | old_passphrase = |
804 | read_passphrase("Enter old passphrase: ", | |
805 | RP_ALLOW_STDIN); | |
806 | private = key_load_private(identity_file, old_passphrase, | |
807 | &comment); | |
aeaa3d9e | 808 | memset(old_passphrase, 0, strlen(old_passphrase)); |
809 | xfree(old_passphrase); | |
810 | if (private == NULL) { | |
5260325f | 811 | printf("Bad passphrase.\n"); |
812 | exit(1); | |
813 | } | |
5260325f | 814 | } |
815 | printf("Key has comment '%s'\n", comment); | |
816 | ||
817 | /* Ask the new passphrase (twice). */ | |
818 | if (identity_new_passphrase) { | |
819 | passphrase1 = xstrdup(identity_new_passphrase); | |
820 | passphrase2 = NULL; | |
821 | } else { | |
822 | passphrase1 = | |
1843a425 | 823 | read_passphrase("Enter new passphrase (empty for no " |
824 | "passphrase): ", RP_ALLOW_STDIN); | |
825 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
184eed6a | 826 | RP_ALLOW_STDIN); |
5260325f | 827 | |
828 | /* Verify that they are the same. */ | |
829 | if (strcmp(passphrase1, passphrase2) != 0) { | |
830 | memset(passphrase1, 0, strlen(passphrase1)); | |
831 | memset(passphrase2, 0, strlen(passphrase2)); | |
832 | xfree(passphrase1); | |
833 | xfree(passphrase2); | |
834 | printf("Pass phrases do not match. Try again.\n"); | |
835 | exit(1); | |
836 | } | |
837 | /* Destroy the other copy. */ | |
838 | memset(passphrase2, 0, strlen(passphrase2)); | |
839 | xfree(passphrase2); | |
8efc0c15 | 840 | } |
8efc0c15 | 841 | |
5260325f | 842 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 843 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 844 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 845 | memset(passphrase1, 0, strlen(passphrase1)); |
846 | xfree(passphrase1); | |
a306f2dd | 847 | key_free(private); |
5260325f | 848 | xfree(comment); |
849 | exit(1); | |
850 | } | |
851 | /* Destroy the passphrase and the copy of the key in memory. */ | |
852 | memset(passphrase1, 0, strlen(passphrase1)); | |
853 | xfree(passphrase1); | |
a306f2dd | 854 | key_free(private); /* Destroys contents */ |
5260325f | 855 | xfree(comment); |
856 | ||
857 | printf("Your identification has been saved with the new passphrase.\n"); | |
858 | exit(0); | |
859 | } | |
8efc0c15 | 860 | |
21289cd0 | 861 | /* |
862 | * Print the SSHFP RR. | |
863 | */ | |
3eff92ec | 864 | static int |
865 | do_print_resource_record(struct passwd *pw, char *fname, char *hname) | |
21289cd0 | 866 | { |
867 | Key *public; | |
868 | char *comment = NULL; | |
869 | struct stat st; | |
870 | ||
3eff92ec | 871 | if (fname == NULL) |
21289cd0 | 872 | ask_filename(pw, "Enter file in which the key is"); |
3eff92ec | 873 | if (stat(fname, &st) < 0) { |
874 | if (errno == ENOENT) | |
875 | return 0; | |
876 | perror(fname); | |
21289cd0 | 877 | exit(1); |
878 | } | |
3eff92ec | 879 | public = key_load_public(fname, &comment); |
21289cd0 | 880 | if (public != NULL) { |
ca75d7de | 881 | export_dns_rr(hname, public, stdout, print_generic); |
21289cd0 | 882 | key_free(public); |
883 | xfree(comment); | |
3eff92ec | 884 | return 1; |
21289cd0 | 885 | } |
886 | if (comment) | |
887 | xfree(comment); | |
888 | ||
3eff92ec | 889 | printf("failed to read v2 public key from %s.\n", fname); |
21289cd0 | 890 | exit(1); |
891 | } | |
21289cd0 | 892 | |
5260325f | 893 | /* |
894 | * Change the comment of a private key file. | |
895 | */ | |
396c147e | 896 | static void |
8efc0c15 | 897 | do_change_comment(struct passwd *pw) |
898 | { | |
1c9a907f | 899 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 900 | Key *private; |
901 | Key *public; | |
5260325f | 902 | struct stat st; |
903 | FILE *f; | |
1c9a907f | 904 | int fd; |
5260325f | 905 | |
906 | if (!have_identity) | |
907 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 908 | if (stat(identity_file, &st) < 0) { |
909 | perror(identity_file); | |
910 | exit(1); | |
911 | } | |
aeaa3d9e | 912 | private = key_load_private(identity_file, "", &comment); |
913 | if (private == NULL) { | |
5260325f | 914 | if (identity_passphrase) |
915 | passphrase = xstrdup(identity_passphrase); | |
916 | else if (identity_new_passphrase) | |
917 | passphrase = xstrdup(identity_new_passphrase); | |
918 | else | |
1843a425 | 919 | passphrase = read_passphrase("Enter passphrase: ", |
920 | RP_ALLOW_STDIN); | |
5260325f | 921 | /* Try to load using the passphrase. */ |
aeaa3d9e | 922 | private = key_load_private(identity_file, passphrase, &comment); |
923 | if (private == NULL) { | |
5260325f | 924 | memset(passphrase, 0, strlen(passphrase)); |
925 | xfree(passphrase); | |
926 | printf("Bad passphrase.\n"); | |
927 | exit(1); | |
928 | } | |
aeaa3d9e | 929 | } else { |
930 | passphrase = xstrdup(""); | |
5260325f | 931 | } |
aeaa3d9e | 932 | if (private->type != KEY_RSA1) { |
933 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
934 | key_free(private); | |
935 | exit(1); | |
184eed6a | 936 | } |
5260325f | 937 | printf("Key now has comment '%s'\n", comment); |
938 | ||
939 | if (identity_comment) { | |
940 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
941 | } else { | |
942 | printf("Enter new comment: "); | |
943 | fflush(stdout); | |
944 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
945 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 946 | key_free(private); |
5260325f | 947 | exit(1); |
948 | } | |
5260325f | 949 | if (strchr(new_comment, '\n')) |
950 | *strchr(new_comment, '\n') = 0; | |
951 | } | |
952 | ||
953 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 954 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
58cfa257 | 955 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 956 | memset(passphrase, 0, strlen(passphrase)); |
957 | xfree(passphrase); | |
a306f2dd | 958 | key_free(private); |
5260325f | 959 | xfree(comment); |
960 | exit(1); | |
8efc0c15 | 961 | } |
5260325f | 962 | memset(passphrase, 0, strlen(passphrase)); |
963 | xfree(passphrase); | |
aeaa3d9e | 964 | public = key_from_private(private); |
a306f2dd | 965 | key_free(private); |
5260325f | 966 | |
5260325f | 967 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 968 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
969 | if (fd == -1) { | |
5260325f | 970 | printf("Could not save your public key in %s\n", identity_file); |
971 | exit(1); | |
972 | } | |
1c9a907f | 973 | f = fdopen(fd, "w"); |
974 | if (f == NULL) { | |
975 | printf("fdopen %s failed", identity_file); | |
976 | exit(1); | |
977 | } | |
a306f2dd | 978 | if (!key_write(public, f)) |
979 | fprintf(stderr, "write key failed"); | |
980 | key_free(public); | |
981 | fprintf(f, " %s\n", new_comment); | |
5260325f | 982 | fclose(f); |
983 | ||
984 | xfree(comment); | |
985 | ||
986 | printf("The comment in your key file has been changed.\n"); | |
987 | exit(0); | |
8efc0c15 | 988 | } |
989 | ||
396c147e | 990 | static void |
5ad13cd7 | 991 | usage(void) |
992 | { | |
58153e34 | 993 | fprintf(stderr, "Usage: %s [options]\n", __progname); |
994 | fprintf(stderr, "Options:\n"); | |
4feb61af | 995 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
996 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
58153e34 | 997 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
4feb61af | 998 | fprintf(stderr, " -C comment Provide new comment.\n"); |
58153e34 | 999 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
4feb61af | 1000 | #ifdef SMARTCARD |
1001 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
1002 | #endif /* SMARTCARD */ | |
58153e34 | 1003 | fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n"); |
4feb61af | 1004 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
58153e34 | 1005 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
4feb61af | 1006 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
21289cd0 | 1007 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
4feb61af | 1008 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
58153e34 | 1009 | fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n"); |
1010 | fprintf(stderr, " -l Show fingerprint of key file.\n"); | |
4feb61af | 1011 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
58153e34 | 1012 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
1013 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
4feb61af | 1014 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
1015 | fprintf(stderr, " -q Quiet.\n"); | |
1016 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
21289cd0 | 1017 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
4feb61af | 1018 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
1019 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
1020 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
58153e34 | 1021 | #ifdef SMARTCARD |
58153e34 | 1022 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
1023 | #endif /* SMARTCARD */ | |
4feb61af | 1024 | fprintf(stderr, " -v Verbose.\n"); |
1025 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
1026 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
c35a6dc5 | 1027 | |
5260325f | 1028 | exit(1); |
5ad13cd7 | 1029 | } |
1030 | ||
5260325f | 1031 | /* |
1032 | * Main program for key management. | |
1033 | */ | |
8efc0c15 | 1034 | int |
1035 | main(int ac, char **av) | |
1036 | { | |
3dc93cd8 | 1037 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
8f52069e | 1038 | char out_file[MAXPATHLEN], *reader_id = NULL; |
bdffbcdc | 1039 | char *rr_hostname = NULL; |
1c9a907f | 1040 | Key *private, *public; |
5260325f | 1041 | struct passwd *pw; |
5260325f | 1042 | struct stat st; |
c784ae09 | 1043 | int opt, type, fd, download = 0; |
2a1995a3 | 1044 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; |
c35a6dc5 | 1045 | int do_gen_candidates = 0, do_screen_candidates = 0; |
c6fbc95a | 1046 | int log_level = SYSLOG_LEVEL_INFO; |
c35a6dc5 | 1047 | BIGNUM *start = NULL; |
5260325f | 1048 | FILE *f; |
de4feb6b | 1049 | const char *errstr; |
fa08c86b | 1050 | |
5260325f | 1051 | extern int optind; |
1052 | extern char *optarg; | |
1053 | ||
fd6168c1 | 1054 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1055 | sanitise_stdfd(); | |
1056 | ||
fda04d7d | 1057 | __progname = ssh_get_progname(av[0]); |
264dce47 | 1058 | |
fa649821 | 1059 | SSLeay_add_all_algorithms(); |
c35a6dc5 | 1060 | log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
1061 | ||
ce88d9df | 1062 | init_rng(); |
1063 | seed_rng(); | |
a306f2dd | 1064 | |
aa3378df | 1065 | /* we need this for the home * directory. */ |
5260325f | 1066 | pw = getpwuid(getuid()); |
1067 | if (!pw) { | |
1068 | printf("You don't exist, go away!\n"); | |
1069 | exit(1); | |
1070 | } | |
a306f2dd | 1071 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
1072 | perror("gethostname"); | |
1073 | exit(1); | |
1074 | } | |
aa3378df | 1075 | |
c35a6dc5 | 1076 | while ((opt = getopt(ac, av, |
bdffbcdc | 1077 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
5260325f | 1078 | switch (opt) { |
1079 | case 'b': | |
0fe9892f | 1080 | bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr); |
de4feb6b | 1081 | if (errstr) |
1082 | fatal("Bits has bad value %s (%s)", | |
1083 | optarg, errstr); | |
5260325f | 1084 | break; |
bdffbcdc | 1085 | case 'F': |
1086 | find_host = 1; | |
1087 | rr_hostname = optarg; | |
1088 | break; | |
1089 | case 'H': | |
1090 | hash_hosts = 1; | |
1091 | break; | |
1092 | case 'R': | |
1093 | delete_host = 1; | |
1094 | rr_hostname = optarg; | |
1095 | break; | |
5260325f | 1096 | case 'l': |
1097 | print_fingerprint = 1; | |
1098 | break; | |
aaf45d87 | 1099 | case 'B': |
1100 | print_bubblebabble = 1; | |
1101 | break; | |
5260325f | 1102 | case 'p': |
1103 | change_passphrase = 1; | |
1104 | break; | |
5260325f | 1105 | case 'c': |
1106 | change_comment = 1; | |
1107 | break; | |
5260325f | 1108 | case 'f': |
c784ae09 | 1109 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1110 | sizeof(identity_file)) | |
1111 | fatal("Identity filename too long"); | |
5260325f | 1112 | have_identity = 1; |
1113 | break; | |
21289cd0 | 1114 | case 'g': |
1115 | print_generic = 1; | |
1116 | break; | |
5260325f | 1117 | case 'P': |
1118 | identity_passphrase = optarg; | |
1119 | break; | |
5260325f | 1120 | case 'N': |
1121 | identity_new_passphrase = optarg; | |
1122 | break; | |
5260325f | 1123 | case 'C': |
1124 | identity_comment = optarg; | |
1125 | break; | |
5260325f | 1126 | case 'q': |
1127 | quiet = 1; | |
1128 | break; | |
5deceabb | 1129 | case 'e': |
a306f2dd | 1130 | case 'x': |
5deceabb | 1131 | /* export key */ |
a306f2dd | 1132 | convert_to_ssh2 = 1; |
1133 | break; | |
5deceabb | 1134 | case 'i': |
a306f2dd | 1135 | case 'X': |
5deceabb | 1136 | /* import key */ |
a306f2dd | 1137 | convert_from_ssh2 = 1; |
1138 | break; | |
a306f2dd | 1139 | case 'y': |
1140 | print_public = 1; | |
1141 | break; | |
a306f2dd | 1142 | case 'd': |
fa08c86b | 1143 | key_type_name = "dsa"; |
a306f2dd | 1144 | break; |
fa08c86b | 1145 | case 't': |
1146 | key_type_name = optarg; | |
fa08c86b | 1147 | break; |
93a56445 | 1148 | case 'D': |
1149 | download = 1; | |
32596c7b | 1150 | /*FALLTHROUGH*/ |
285d2b15 | 1151 | case 'U': |
93a56445 | 1152 | reader_id = optarg; |
2b30154a | 1153 | break; |
c6fbc95a | 1154 | case 'v': |
1155 | if (log_level == SYSLOG_LEVEL_INFO) | |
1156 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1157 | else { | |
f2107e97 | 1158 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
c6fbc95a | 1159 | log_level < SYSLOG_LEVEL_DEBUG3) |
1160 | log_level++; | |
1161 | } | |
1162 | break; | |
21289cd0 | 1163 | case 'r': |
bdffbcdc | 1164 | rr_hostname = optarg; |
21289cd0 | 1165 | break; |
c35a6dc5 | 1166 | case 'W': |
0fe9892f | 1167 | generator_wanted = (u_int32_t)strtonum(optarg, 1, |
1168 | UINT_MAX, &errstr); | |
c784ae09 | 1169 | if (errstr) |
1170 | fatal("Desired generator has bad value: %s (%s)", | |
1171 | optarg, errstr); | |
c35a6dc5 | 1172 | break; |
1173 | case 'a': | |
0fe9892f | 1174 | trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1175 | if (errstr) |
1176 | fatal("Invalid number of trials: %s (%s)", | |
1177 | optarg, errstr); | |
c35a6dc5 | 1178 | break; |
1179 | case 'M': | |
0fe9892f | 1180 | memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1181 | if (errstr) { |
1182 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1183 | } | |
c35a6dc5 | 1184 | break; |
1185 | case 'G': | |
1186 | do_gen_candidates = 1; | |
c784ae09 | 1187 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1188 | sizeof(out_file)) | |
1189 | fatal("Output filename too long"); | |
c35a6dc5 | 1190 | break; |
1191 | case 'T': | |
1192 | do_screen_candidates = 1; | |
c784ae09 | 1193 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1194 | sizeof(out_file)) | |
1195 | fatal("Output filename too long"); | |
c35a6dc5 | 1196 | break; |
1197 | case 'S': | |
1198 | /* XXX - also compare length against bits */ | |
1199 | if (BN_hex2bn(&start, optarg) == 0) | |
1200 | fatal("Invalid start point."); | |
1201 | break; | |
5260325f | 1202 | case '?': |
1203 | default: | |
1204 | usage(); | |
1205 | } | |
1206 | } | |
c6fbc95a | 1207 | |
1208 | /* reinit */ | |
1209 | log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1); | |
1210 | ||
5260325f | 1211 | if (optind < ac) { |
1212 | printf("Too many arguments.\n"); | |
1213 | usage(); | |
1214 | } | |
1215 | if (change_passphrase && change_comment) { | |
1216 | printf("Can only have one of -p and -c.\n"); | |
1217 | usage(); | |
1218 | } | |
bdffbcdc | 1219 | if (delete_host || hash_hosts || find_host) |
1220 | do_known_hosts(pw, rr_hostname); | |
aaf45d87 | 1221 | if (print_fingerprint || print_bubblebabble) |
5260325f | 1222 | do_fingerprint(pw); |
5260325f | 1223 | if (change_passphrase) |
1224 | do_change_passphrase(pw); | |
633151a3 | 1225 | if (change_comment) |
1226 | do_change_comment(pw); | |
ce88d9df | 1227 | if (convert_to_ssh2) |
1228 | do_convert_to_ssh2(pw); | |
1229 | if (convert_from_ssh2) | |
1230 | do_convert_from_ssh2(pw); | |
a306f2dd | 1231 | if (print_public) |
1232 | do_print_public(pw); | |
bdffbcdc | 1233 | if (rr_hostname != NULL) { |
3eff92ec | 1234 | unsigned int n = 0; |
1235 | ||
1236 | if (have_identity) { | |
1237 | n = do_print_resource_record(pw, | |
1238 | identity_file, rr_hostname); | |
1239 | if (n == 0) { | |
1240 | perror(identity_file); | |
1241 | exit(1); | |
1242 | } | |
1243 | exit(0); | |
1244 | } else { | |
1245 | ||
1246 | n += do_print_resource_record(pw, | |
1247 | _PATH_HOST_RSA_KEY_FILE, rr_hostname); | |
1248 | n += do_print_resource_record(pw, | |
1249 | _PATH_HOST_DSA_KEY_FILE, rr_hostname); | |
1250 | ||
1251 | if (n == 0) | |
1252 | fatal("no keys found."); | |
1253 | exit(0); | |
1254 | } | |
21289cd0 | 1255 | } |
93a56445 | 1256 | if (reader_id != NULL) { |
4f831fd7 | 1257 | #ifdef SMARTCARD |
93a56445 | 1258 | if (download) |
1259 | do_download(pw, reader_id); | |
1260 | else | |
1261 | do_upload(pw, reader_id); | |
3e984472 | 1262 | #else /* SMARTCARD */ |
4f831fd7 | 1263 | fatal("no support for smartcards."); |
3e984472 | 1264 | #endif /* SMARTCARD */ |
93a56445 | 1265 | } |
5260325f | 1266 | |
c35a6dc5 | 1267 | if (do_gen_candidates) { |
1268 | FILE *out = fopen(out_file, "w"); | |
b6453d99 | 1269 | |
c35a6dc5 | 1270 | if (out == NULL) { |
1271 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1272 | out_file, strerror(errno)); | |
1273 | return (1); | |
1274 | } | |
255d3e00 | 1275 | if (bits == 0) |
1276 | bits = DEFAULT_BITS; | |
c35a6dc5 | 1277 | if (gen_candidates(out, memory, bits, start) != 0) |
17318dd6 | 1278 | fatal("modulus candidate generation failed"); |
c35a6dc5 | 1279 | |
1280 | return (0); | |
1281 | } | |
1282 | ||
1283 | if (do_screen_candidates) { | |
1284 | FILE *in; | |
1285 | FILE *out = fopen(out_file, "w"); | |
1286 | ||
1287 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1288 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1289 | fatal("Couldn't open modulus candidate " | |
aff51935 | 1290 | "file \"%s\": %s", identity_file, |
c35a6dc5 | 1291 | strerror(errno)); |
1292 | } | |
1293 | } else | |
1294 | in = stdin; | |
1295 | ||
1296 | if (out == NULL) { | |
1297 | fatal("Couldn't open moduli file \"%s\": %s", | |
1298 | out_file, strerror(errno)); | |
1299 | } | |
1300 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
17318dd6 | 1301 | fatal("modulus screening failed"); |
08d035b6 | 1302 | return (0); |
c35a6dc5 | 1303 | } |
1304 | ||
5260325f | 1305 | arc4random_stir(); |
1306 | ||
882c9d5a | 1307 | if (key_type_name == NULL) |
1308 | key_type_name = "rsa"; | |
1309 | ||
c523303b | 1310 | type = key_type_from_name(key_type_name); |
1311 | if (type == KEY_UNSPEC) { | |
1312 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1313 | exit(1); | |
a306f2dd | 1314 | } |
255d3e00 | 1315 | if (bits == 0) |
1316 | bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; | |
6e94bd72 | 1317 | if (type == KEY_DSA && bits != 1024) |
1318 | fatal("DSA keys must be 1024 bits"); | |
60dc0294 | 1319 | if (!quiet) |
1320 | printf("Generating public/private %s key pair.\n", key_type_name); | |
fa08c86b | 1321 | private = key_generate(type, bits); |
1322 | if (private == NULL) { | |
1323 | fprintf(stderr, "key_generate failed"); | |
1324 | exit(1); | |
1325 | } | |
1326 | public = key_from_private(private); | |
5260325f | 1327 | |
1328 | if (!have_identity) | |
1329 | ask_filename(pw, "Enter file in which to save the key"); | |
1330 | ||
7b9b0103 | 1331 | /* Create ~/.ssh directory if it doesn't already exist. */ |
42f11eb2 | 1332 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 1333 | if (strstr(identity_file, dotsshdir) != NULL && |
1334 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 1335 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 1336 | error("Could not create directory '%s'.", dotsshdir); |
1337 | else if (!quiet) | |
1338 | printf("Created directory '%s'.\n", dotsshdir); | |
1339 | } | |
1340 | /* If the file already exists, ask the user to confirm. */ | |
1341 | if (stat(identity_file, &st) >= 0) { | |
1342 | char yesno[3]; | |
1343 | printf("%s already exists.\n", identity_file); | |
1344 | printf("Overwrite (y/n)? "); | |
1345 | fflush(stdout); | |
1346 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1347 | exit(1); | |
1348 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1349 | exit(1); | |
1350 | } | |
1351 | /* Ask for a passphrase (twice). */ | |
1352 | if (identity_passphrase) | |
1353 | passphrase1 = xstrdup(identity_passphrase); | |
1354 | else if (identity_new_passphrase) | |
1355 | passphrase1 = xstrdup(identity_new_passphrase); | |
1356 | else { | |
1357 | passphrase_again: | |
1358 | passphrase1 = | |
1843a425 | 1359 | read_passphrase("Enter passphrase (empty for no " |
1360 | "passphrase): ", RP_ALLOW_STDIN); | |
1361 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1362 | RP_ALLOW_STDIN); | |
5260325f | 1363 | if (strcmp(passphrase1, passphrase2) != 0) { |
1843a425 | 1364 | /* |
1365 | * The passphrases do not match. Clear them and | |
1366 | * retry. | |
1367 | */ | |
5260325f | 1368 | memset(passphrase1, 0, strlen(passphrase1)); |
1369 | memset(passphrase2, 0, strlen(passphrase2)); | |
1370 | xfree(passphrase1); | |
1371 | xfree(passphrase2); | |
1372 | printf("Passphrases do not match. Try again.\n"); | |
1373 | goto passphrase_again; | |
1374 | } | |
1375 | /* Clear the other copy of the passphrase. */ | |
1376 | memset(passphrase2, 0, strlen(passphrase2)); | |
1377 | xfree(passphrase2); | |
1378 | } | |
1379 | ||
5260325f | 1380 | if (identity_comment) { |
1381 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1382 | } else { | |
6ae2364d | 1383 | /* Create default commend field for the passphrase. */ |
5260325f | 1384 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
1385 | } | |
1386 | ||
1387 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 1388 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 1389 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 1390 | memset(passphrase1, 0, strlen(passphrase1)); |
1391 | xfree(passphrase1); | |
1392 | exit(1); | |
1393 | } | |
1394 | /* Clear the passphrase. */ | |
1395 | memset(passphrase1, 0, strlen(passphrase1)); | |
1396 | xfree(passphrase1); | |
1397 | ||
1398 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 1399 | key_free(private); |
5260325f | 1400 | arc4random_stir(); |
1401 | ||
1402 | if (!quiet) | |
1403 | printf("Your identification has been saved in %s.\n", identity_file); | |
1404 | ||
5260325f | 1405 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1406 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1407 | if (fd == -1) { | |
5260325f | 1408 | printf("Could not save your public key in %s\n", identity_file); |
1409 | exit(1); | |
1410 | } | |
1c9a907f | 1411 | f = fdopen(fd, "w"); |
1412 | if (f == NULL) { | |
1413 | printf("fdopen %s failed", identity_file); | |
1414 | exit(1); | |
1415 | } | |
a306f2dd | 1416 | if (!key_write(public, f)) |
1417 | fprintf(stderr, "write key failed"); | |
1418 | fprintf(f, " %s\n", comment); | |
5260325f | 1419 | fclose(f); |
1420 | ||
1421 | if (!quiet) { | |
22138a36 | 1422 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 1423 | printf("Your public key has been saved in %s.\n", |
1424 | identity_file); | |
5260325f | 1425 | printf("The key fingerprint is:\n"); |
22138a36 | 1426 | printf("%s %s\n", fp, comment); |
1427 | xfree(fp); | |
8efc0c15 | 1428 | } |
a306f2dd | 1429 | |
1430 | key_free(public); | |
5260325f | 1431 | exit(0); |
8efc0c15 | 1432 | } |