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048acbeb | 1 | /* $OpenBSD: ssh-keygen.c,v 1.166 2008/05/19 15:46:31 djm 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> | |
5b04a8bf | 18 | #include <sys/socket.h> |
4095f623 | 19 | #include <sys/stat.h> |
536c14e8 | 20 | #include <sys/param.h> |
8efc0c15 | 21 | |
a306f2dd | 22 | #include <openssl/evp.h> |
23 | #include <openssl/pem.h> | |
f5f25d17 | 24 | #include "openbsd-compat/openssl-compat.h" |
a306f2dd | 25 | |
028094f4 | 26 | #include <errno.h> |
d3221cca | 27 | #include <fcntl.h> |
28cb0a43 | 28 | #include <netdb.h> |
42685763 | 29 | #ifdef HAVE_PATHS_H |
30 | # include <paths.h> | |
31 | #endif | |
b1842393 | 32 | #include <pwd.h> |
24436b92 | 33 | #include <stdarg.h> |
cf851879 | 34 | #include <stdio.h> |
ffa517a8 | 35 | #include <stdlib.h> |
00146caa | 36 | #include <string.h> |
5188ba17 | 37 | #include <unistd.h> |
b1842393 | 38 | |
8efc0c15 | 39 | #include "xmalloc.h" |
a306f2dd | 40 | #include "key.h" |
457fc0c6 | 41 | #include "rsa.h" |
a306f2dd | 42 | #include "authfile.h" |
43 | #include "uuencode.h" | |
94ec8c6b | 44 | #include "buffer.h" |
42f11eb2 | 45 | #include "pathnames.h" |
46 | #include "log.h" | |
58ae9cb8 | 47 | #include "misc.h" |
bdffbcdc | 48 | #include "match.h" |
49 | #include "hostfile.h" | |
0cbe25f0 | 50 | #include "dns.h" |
94ec8c6b | 51 | |
93a56445 | 52 | #ifdef SMARTCARD |
93a56445 | 53 | #include "scard.h" |
dd2495cb | 54 | #endif |
2b30154a | 55 | |
255d3e00 | 56 | /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ |
57 | #define DEFAULT_BITS 2048 | |
58 | #define DEFAULT_BITS_DSA 1024 | |
59 | u_int32_t bits = 0; | |
8efc0c15 | 60 | |
aa3378df | 61 | /* |
62 | * Flag indicating that we just want to change the passphrase. This can be | |
63 | * set on the command line. | |
64 | */ | |
8efc0c15 | 65 | int change_passphrase = 0; |
66 | ||
aa3378df | 67 | /* |
68 | * Flag indicating that we just want to change the comment. This can be set | |
69 | * on the command line. | |
70 | */ | |
8efc0c15 | 71 | int change_comment = 0; |
72 | ||
73 | int quiet = 0; | |
74 | ||
bdffbcdc | 75 | /* Flag indicating that we want to hash a known_hosts file */ |
76 | int hash_hosts = 0; | |
77 | /* Flag indicating that we want lookup a host in known_hosts file */ | |
78 | int find_host = 0; | |
79 | /* Flag indicating that we want to delete a host from a known_hosts file */ | |
80 | int delete_host = 0; | |
81 | ||
f095fcc7 | 82 | /* Flag indicating that we just want to see the key fingerprint */ |
83 | int print_fingerprint = 0; | |
aaf45d87 | 84 | int print_bubblebabble = 0; |
f095fcc7 | 85 | |
5ad13cd7 | 86 | /* The identity file name, given on the command line or entered by the user. */ |
87 | char identity_file[1024]; | |
88 | int have_identity = 0; | |
8efc0c15 | 89 | |
90 | /* This is set to the passphrase if given on the command line. */ | |
91 | char *identity_passphrase = NULL; | |
92 | ||
93 | /* This is set to the new passphrase if given on the command line. */ | |
94 | char *identity_new_passphrase = NULL; | |
95 | ||
96 | /* This is set to the new comment if given on the command line. */ | |
97 | char *identity_comment = NULL; | |
98 | ||
a306f2dd | 99 | /* Dump public key file in format used by real and the original SSH 2 */ |
100 | int convert_to_ssh2 = 0; | |
101 | int convert_from_ssh2 = 0; | |
102 | int print_public = 0; | |
21289cd0 | 103 | int print_generic = 0; |
fa08c86b | 104 | |
3dc93cd8 | 105 | char *key_type_name = NULL; |
a306f2dd | 106 | |
5ad13cd7 | 107 | /* argv0 */ |
108 | extern char *__progname; | |
8efc0c15 | 109 | |
a306f2dd | 110 | char hostname[MAXHOSTNAMELEN]; |
111 | ||
20eea1d7 | 112 | /* moduli.c */ |
c784ae09 | 113 | int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
20eea1d7 | 114 | int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
115 | ||
396c147e | 116 | static void |
5ad13cd7 | 117 | ask_filename(struct passwd *pw, const char *prompt) |
8efc0c15 | 118 | { |
5260325f | 119 | char buf[1024]; |
c523303b | 120 | char *name = NULL; |
121 | ||
8d22d775 | 122 | if (key_type_name == NULL) |
42f11eb2 | 123 | name = _PATH_SSH_CLIENT_ID_RSA; |
32596c7b | 124 | else { |
8d22d775 | 125 | switch (key_type_from_name(key_type_name)) { |
126 | case KEY_RSA1: | |
127 | name = _PATH_SSH_CLIENT_IDENTITY; | |
128 | break; | |
129 | case KEY_DSA: | |
130 | name = _PATH_SSH_CLIENT_ID_DSA; | |
131 | break; | |
132 | case KEY_RSA: | |
133 | name = _PATH_SSH_CLIENT_ID_RSA; | |
134 | break; | |
135 | default: | |
136 | fprintf(stderr, "bad key type"); | |
137 | exit(1); | |
138 | break; | |
139 | } | |
32596c7b | 140 | } |
c523303b | 141 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
8d88011e | 142 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
5260325f | 143 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
144 | exit(1); | |
b05117ac | 145 | buf[strcspn(buf, "\n")] = '\0'; |
5260325f | 146 | if (strcmp(buf, "") != 0) |
147 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
148 | have_identity = 1; | |
f095fcc7 | 149 | } |
8efc0c15 | 150 | |
396c147e | 151 | static Key * |
abe0fb9f | 152 | load_identity(char *filename) |
a306f2dd | 153 | { |
aeaa3d9e | 154 | char *pass; |
155 | Key *prv; | |
156 | ||
cd332296 | 157 | prv = key_load_private(filename, "", NULL); |
aeaa3d9e | 158 | if (prv == NULL) { |
abe0fb9f | 159 | if (identity_passphrase) |
160 | pass = xstrdup(identity_passphrase); | |
161 | else | |
1843a425 | 162 | pass = read_passphrase("Enter passphrase: ", |
163 | RP_ALLOW_STDIN); | |
aeaa3d9e | 164 | prv = key_load_private(filename, pass, NULL); |
a306f2dd | 165 | memset(pass, 0, strlen(pass)); |
166 | xfree(pass); | |
167 | } | |
aeaa3d9e | 168 | return prv; |
a306f2dd | 169 | } |
170 | ||
94ec8c6b | 171 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
7203d6bb | 172 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
94ec8c6b | 173 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
2b87da3b | 174 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 175 | |
396c147e | 176 | static void |
a306f2dd | 177 | do_convert_to_ssh2(struct passwd *pw) |
178 | { | |
b587c165 | 179 | Key *k; |
21b30f38 | 180 | u_int len; |
1e3b8b07 | 181 | u_char *blob; |
a306f2dd | 182 | struct stat st; |
183 | ||
184 | if (!have_identity) | |
185 | ask_filename(pw, "Enter file in which the key is"); | |
186 | if (stat(identity_file, &st) < 0) { | |
187 | perror(identity_file); | |
188 | exit(1); | |
189 | } | |
b587c165 | 190 | if ((k = key_load_public(identity_file, NULL)) == NULL) { |
abe0fb9f | 191 | if ((k = load_identity(identity_file)) == NULL) { |
b587c165 | 192 | fprintf(stderr, "load failed\n"); |
193 | exit(1); | |
194 | } | |
a306f2dd | 195 | } |
3566c73c | 196 | if (k->type == KEY_RSA1) { |
197 | fprintf(stderr, "version 1 keys are not supported\n"); | |
198 | exit(1); | |
199 | } | |
f7436b8c | 200 | if (key_to_blob(k, &blob, &len) <= 0) { |
201 | fprintf(stderr, "key_to_blob failed\n"); | |
202 | exit(1); | |
203 | } | |
94ec8c6b | 204 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 205 | fprintf(stdout, |
512df038 | 206 | "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", |
b587c165 | 207 | key_size(k), key_type(k), |
a306f2dd | 208 | pw->pw_name, hostname); |
209 | dump_base64(stdout, blob, len); | |
94ec8c6b | 210 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
b587c165 | 211 | key_free(k); |
a306f2dd | 212 | xfree(blob); |
213 | exit(0); | |
214 | } | |
215 | ||
396c147e | 216 | static void |
94ec8c6b | 217 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
218 | { | |
ca75d7de | 219 | u_int bignum_bits = buffer_get_int(b); |
220 | u_int bytes = (bignum_bits + 7) / 8; | |
457fc0c6 | 221 | |
94ec8c6b | 222 | if (buffer_len(b) < bytes) |
457fc0c6 | 223 | fatal("buffer_get_bignum_bits: input buffer too small: " |
224 | "need %d have %d", bytes, buffer_len(b)); | |
e516451d | 225 | if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL) |
226 | fatal("buffer_get_bignum_bits: BN_bin2bn failed"); | |
94ec8c6b | 227 | buffer_consume(b, bytes); |
228 | } | |
229 | ||
396c147e | 230 | static Key * |
c66f9d0e | 231 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
94ec8c6b | 232 | { |
233 | Buffer b; | |
94ec8c6b | 234 | Key *key = NULL; |
a599bd06 | 235 | char *type, *cipher; |
d3260e12 | 236 | u_char *sig, data[] = "abcde12345"; |
2e0becb6 | 237 | int magic, rlen, ktype, i1, i2, i3, i4; |
a599bd06 | 238 | u_int slen; |
2e0becb6 | 239 | u_long e; |
94ec8c6b | 240 | |
241 | buffer_init(&b); | |
242 | buffer_append(&b, blob, blen); | |
243 | ||
803c4226 | 244 | magic = buffer_get_int(&b); |
94ec8c6b | 245 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { |
246 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
247 | buffer_free(&b); | |
248 | return NULL; | |
249 | } | |
2e0becb6 | 250 | i1 = buffer_get_int(&b); |
94ec8c6b | 251 | type = buffer_get_string(&b, NULL); |
252 | cipher = buffer_get_string(&b, NULL); | |
2e0becb6 | 253 | i2 = buffer_get_int(&b); |
254 | i3 = buffer_get_int(&b); | |
255 | i4 = buffer_get_int(&b); | |
4f6e2ba9 | 256 | debug("ignore (%d %d %d %d)", i1, i2, i3, i4); |
94ec8c6b | 257 | if (strcmp(cipher, "none") != 0) { |
258 | error("unsupported cipher %s", cipher); | |
259 | xfree(cipher); | |
260 | buffer_free(&b); | |
457fc0c6 | 261 | xfree(type); |
94ec8c6b | 262 | return NULL; |
263 | } | |
264 | xfree(cipher); | |
265 | ||
457fc0c6 | 266 | if (strstr(type, "dsa")) { |
267 | ktype = KEY_DSA; | |
268 | } else if (strstr(type, "rsa")) { | |
269 | ktype = KEY_RSA; | |
270 | } else { | |
3c460ede | 271 | buffer_free(&b); |
457fc0c6 | 272 | xfree(type); |
94ec8c6b | 273 | return NULL; |
274 | } | |
457fc0c6 | 275 | key = key_new_private(ktype); |
276 | xfree(type); | |
277 | ||
278 | switch (key->type) { | |
279 | case KEY_DSA: | |
280 | buffer_get_bignum_bits(&b, key->dsa->p); | |
281 | buffer_get_bignum_bits(&b, key->dsa->g); | |
282 | buffer_get_bignum_bits(&b, key->dsa->q); | |
283 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
284 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
285 | break; | |
286 | case KEY_RSA: | |
803c4226 | 287 | e = buffer_get_char(&b); |
2e0becb6 | 288 | debug("e %lx", e); |
289 | if (e < 30) { | |
290 | e <<= 8; | |
291 | e += buffer_get_char(&b); | |
292 | debug("e %lx", e); | |
293 | e <<= 8; | |
294 | e += buffer_get_char(&b); | |
295 | debug("e %lx", e); | |
296 | } | |
297 | if (!BN_set_word(key->rsa->e, e)) { | |
457fc0c6 | 298 | buffer_free(&b); |
299 | key_free(key); | |
300 | return NULL; | |
301 | } | |
302 | buffer_get_bignum_bits(&b, key->rsa->d); | |
303 | buffer_get_bignum_bits(&b, key->rsa->n); | |
304 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
305 | buffer_get_bignum_bits(&b, key->rsa->q); | |
306 | buffer_get_bignum_bits(&b, key->rsa->p); | |
2b63e803 | 307 | rsa_generate_additional_parameters(key->rsa); |
457fc0c6 | 308 | break; |
309 | } | |
94ec8c6b | 310 | rlen = buffer_len(&b); |
6aacefa7 | 311 | if (rlen != 0) |
457fc0c6 | 312 | error("do_convert_private_ssh2_from_blob: " |
313 | "remaining bytes in key blob %d", rlen); | |
94ec8c6b | 314 | buffer_free(&b); |
a599bd06 | 315 | |
316 | /* try the key */ | |
317 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
318 | key_verify(key, sig, slen, data, sizeof(data)); | |
319 | xfree(sig); | |
94ec8c6b | 320 | return key; |
321 | } | |
322 | ||
15b81af3 | 323 | static int |
324 | get_line(FILE *fp, char *line, size_t len) | |
325 | { | |
326 | int c; | |
327 | size_t pos = 0; | |
328 | ||
329 | line[0] = '\0'; | |
330 | while ((c = fgetc(fp)) != EOF) { | |
331 | if (pos >= len - 1) { | |
332 | fprintf(stderr, "input line too long.\n"); | |
333 | exit(1); | |
334 | } | |
32596c7b | 335 | switch (c) { |
15b81af3 | 336 | case '\r': |
337 | c = fgetc(fp); | |
338 | if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { | |
339 | fprintf(stderr, "unget: %s\n", strerror(errno)); | |
340 | exit(1); | |
341 | } | |
342 | return pos; | |
343 | case '\n': | |
344 | return pos; | |
345 | } | |
346 | line[pos++] = c; | |
347 | line[pos] = '\0'; | |
348 | } | |
cbaa43c0 | 349 | /* We reached EOF */ |
350 | return -1; | |
15b81af3 | 351 | } |
352 | ||
396c147e | 353 | static void |
a306f2dd | 354 | do_convert_from_ssh2(struct passwd *pw) |
355 | { | |
356 | Key *k; | |
357 | int blen; | |
783dbbdc | 358 | u_int len; |
15b81af3 | 359 | char line[1024]; |
cf54363d | 360 | u_char blob[8096]; |
a306f2dd | 361 | char encoded[8096]; |
362 | struct stat st; | |
94ec8c6b | 363 | int escaped = 0, private = 0, ok; |
a306f2dd | 364 | FILE *fp; |
365 | ||
366 | if (!have_identity) | |
367 | ask_filename(pw, "Enter file in which the key is"); | |
368 | if (stat(identity_file, &st) < 0) { | |
369 | perror(identity_file); | |
370 | exit(1); | |
371 | } | |
372 | fp = fopen(identity_file, "r"); | |
373 | if (fp == NULL) { | |
374 | perror(identity_file); | |
375 | exit(1); | |
376 | } | |
377 | encoded[0] = '\0'; | |
15b81af3 | 378 | while ((blen = get_line(fp, line, sizeof(line))) != -1) { |
379 | if (line[blen - 1] == '\\') | |
d0c832f3 | 380 | escaped++; |
a306f2dd | 381 | if (strncmp(line, "----", 4) == 0 || |
382 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 383 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
384 | private = 1; | |
a599bd06 | 385 | if (strstr(line, " END ") != NULL) { |
386 | break; | |
387 | } | |
012bc0e1 | 388 | /* fprintf(stderr, "ignore: %s", line); */ |
a306f2dd | 389 | continue; |
390 | } | |
d0c832f3 | 391 | if (escaped) { |
392 | escaped--; | |
012bc0e1 | 393 | /* fprintf(stderr, "escaped: %s", line); */ |
d0c832f3 | 394 | continue; |
a306f2dd | 395 | } |
a306f2dd | 396 | strlcat(encoded, line, sizeof(encoded)); |
397 | } | |
783dbbdc | 398 | len = strlen(encoded); |
399 | if (((len % 4) == 3) && | |
400 | (encoded[len-1] == '=') && | |
401 | (encoded[len-2] == '=') && | |
402 | (encoded[len-3] == '=')) | |
403 | encoded[len-3] = '\0'; | |
e6207598 | 404 | blen = uudecode(encoded, blob, sizeof(blob)); |
a306f2dd | 405 | if (blen < 0) { |
406 | fprintf(stderr, "uudecode failed.\n"); | |
407 | exit(1); | |
408 | } | |
94ec8c6b | 409 | k = private ? |
410 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 411 | key_from_blob(blob, blen); |
94ec8c6b | 412 | if (k == NULL) { |
413 | fprintf(stderr, "decode blob failed.\n"); | |
414 | exit(1); | |
415 | } | |
416 | ok = private ? | |
457fc0c6 | 417 | (k->type == KEY_DSA ? |
418 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
419 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
94ec8c6b | 420 | key_write(k, stdout); |
421 | if (!ok) { | |
422 | fprintf(stderr, "key write failed"); | |
423 | exit(1); | |
424 | } | |
a306f2dd | 425 | key_free(k); |
4ccb828d | 426 | if (!private) |
427 | fprintf(stdout, "\n"); | |
a306f2dd | 428 | fclose(fp); |
429 | exit(0); | |
430 | } | |
431 | ||
396c147e | 432 | static void |
a306f2dd | 433 | do_print_public(struct passwd *pw) |
434 | { | |
aeaa3d9e | 435 | Key *prv; |
a306f2dd | 436 | struct stat st; |
437 | ||
438 | if (!have_identity) | |
439 | ask_filename(pw, "Enter file in which the key is"); | |
440 | if (stat(identity_file, &st) < 0) { | |
441 | perror(identity_file); | |
442 | exit(1); | |
443 | } | |
abe0fb9f | 444 | prv = load_identity(identity_file); |
aeaa3d9e | 445 | if (prv == NULL) { |
a306f2dd | 446 | fprintf(stderr, "load failed\n"); |
447 | exit(1); | |
448 | } | |
aeaa3d9e | 449 | if (!key_write(prv, stdout)) |
a306f2dd | 450 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 451 | key_free(prv); |
a306f2dd | 452 | fprintf(stdout, "\n"); |
453 | exit(0); | |
454 | } | |
455 | ||
4f831fd7 | 456 | #ifdef SMARTCARD |
2b30154a | 457 | static void |
93a56445 | 458 | do_upload(struct passwd *pw, const char *sc_reader_id) |
2b30154a | 459 | { |
2b30154a | 460 | Key *prv = NULL; |
461 | struct stat st; | |
b9f62352 | 462 | int ret; |
463 | ||
2b30154a | 464 | if (!have_identity) |
465 | ask_filename(pw, "Enter file in which the key is"); | |
466 | if (stat(identity_file, &st) < 0) { | |
467 | perror(identity_file); | |
b9f62352 | 468 | exit(1); |
2b30154a | 469 | } |
470 | prv = load_identity(identity_file); | |
471 | if (prv == NULL) { | |
472 | error("load failed"); | |
b9f62352 | 473 | exit(1); |
49ccba9c | 474 | } |
b9f62352 | 475 | ret = sc_put_key(prv, sc_reader_id); |
476 | key_free(prv); | |
477 | if (ret < 0) | |
478 | exit(1); | |
bbe88b6d | 479 | logit("loading key done"); |
b9f62352 | 480 | exit(0); |
2b30154a | 481 | } |
93a56445 | 482 | |
483 | static void | |
484 | do_download(struct passwd *pw, const char *sc_reader_id) | |
485 | { | |
0659cace | 486 | Key **keys = NULL; |
487 | int i; | |
93a56445 | 488 | |
0659cace | 489 | keys = sc_get_keys(sc_reader_id, NULL); |
490 | if (keys == NULL) | |
93a56445 | 491 | fatal("cannot read public key from smartcard"); |
0659cace | 492 | for (i = 0; keys[i]; i++) { |
493 | key_write(keys[i], stdout); | |
494 | key_free(keys[i]); | |
495 | fprintf(stdout, "\n"); | |
496 | } | |
497 | xfree(keys); | |
93a56445 | 498 | exit(0); |
499 | } | |
3e984472 | 500 | #endif /* SMARTCARD */ |
2b30154a | 501 | |
396c147e | 502 | static void |
f095fcc7 | 503 | do_fingerprint(struct passwd *pw) |
504 | { | |
c8d54615 | 505 | FILE *f; |
a306f2dd | 506 | Key *public; |
aaf45d87 | 507 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
f8f89bae | 508 | int i, skip = 0, num = 0, invalid = 1; |
17a3011c | 509 | enum fp_rep rep; |
510 | enum fp_type fptype; | |
5260325f | 511 | struct stat st; |
512 | ||
aeaa3d9e | 513 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
514 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 515 | |
5260325f | 516 | if (!have_identity) |
517 | ask_filename(pw, "Enter file in which the key is"); | |
518 | if (stat(identity_file, &st) < 0) { | |
519 | perror(identity_file); | |
520 | exit(1); | |
521 | } | |
aeaa3d9e | 522 | public = key_load_public(identity_file, &comment); |
523 | if (public != NULL) { | |
524 | fp = key_fingerprint(public, fptype, rep); | |
512df038 | 525 | printf("%u %s %s\n", key_size(public), fp, comment); |
a306f2dd | 526 | key_free(public); |
fa08c86b | 527 | xfree(comment); |
aaf45d87 | 528 | xfree(fp); |
c8d54615 | 529 | exit(0); |
530 | } | |
2b8dc5e3 | 531 | if (comment) { |
aeaa3d9e | 532 | xfree(comment); |
2b8dc5e3 | 533 | comment = NULL; |
534 | } | |
c8d54615 | 535 | |
536 | f = fopen(identity_file, "r"); | |
537 | if (f != NULL) { | |
c8d54615 | 538 | while (fgets(line, sizeof(line), f)) { |
3e2d9453 | 539 | if ((cp = strchr(line, '\n')) == NULL) { |
f8f89bae | 540 | error("line %d too long: %.40s...", |
541 | num + 1, line); | |
c8d54615 | 542 | skip = 1; |
543 | continue; | |
544 | } | |
545 | num++; | |
546 | if (skip) { | |
547 | skip = 0; | |
548 | continue; | |
549 | } | |
3e2d9453 | 550 | *cp = '\0'; |
c8d54615 | 551 | |
552 | /* Skip leading whitespace, empty and comment lines. */ | |
553 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
554 | ; | |
555 | if (!*cp || *cp == '\n' || *cp == '#') | |
4f6e2ba9 | 556 | continue; |
c8d54615 | 557 | i = strtol(cp, &ep, 10); |
558 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
559 | int quoted = 0; | |
560 | comment = cp; | |
512df038 | 561 | for (; *cp && (quoted || (*cp != ' ' && |
562 | *cp != '\t')); cp++) { | |
c8d54615 | 563 | if (*cp == '\\' && cp[1] == '"') |
564 | cp++; /* Skip both */ | |
565 | else if (*cp == '"') | |
566 | quoted = !quoted; | |
567 | } | |
568 | if (!*cp) | |
569 | continue; | |
570 | *cp++ = '\0'; | |
571 | } | |
572 | ep = cp; | |
efcae5b1 | 573 | public = key_new(KEY_RSA1); |
574 | if (key_read(public, &cp) != 1) { | |
575 | cp = ep; | |
576 | key_free(public); | |
577 | public = key_new(KEY_UNSPEC); | |
578 | if (key_read(public, &cp) != 1) { | |
579 | key_free(public); | |
580 | continue; | |
581 | } | |
5260325f | 582 | } |
efcae5b1 | 583 | comment = *cp ? cp : comment; |
aeaa3d9e | 584 | fp = key_fingerprint(public, fptype, rep); |
512df038 | 585 | printf("%u %s %s\n", key_size(public), fp, |
efcae5b1 | 586 | comment ? comment : "no comment"); |
aaf45d87 | 587 | xfree(fp); |
aeaa3d9e | 588 | key_free(public); |
efcae5b1 | 589 | invalid = 0; |
5260325f | 590 | } |
c8d54615 | 591 | fclose(f); |
592 | } | |
593 | if (invalid) { | |
f564d016 | 594 | printf("%s is not a public key file.\n", identity_file); |
c8d54615 | 595 | exit(1); |
5260325f | 596 | } |
5260325f | 597 | exit(0); |
f095fcc7 | 598 | } |
599 | ||
bdffbcdc | 600 | static void |
ccc6beea | 601 | print_host(FILE *f, const char *name, Key *public, int hash) |
bdffbcdc | 602 | { |
048acbeb | 603 | if (print_fingerprint) { |
604 | enum fp_rep rep; | |
605 | enum fp_type fptype; | |
606 | char *fp; | |
607 | ||
608 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; | |
609 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
610 | fp = key_fingerprint(public, fptype, rep); | |
611 | printf("%u %s %s\n", key_size(public), fp, name); | |
612 | xfree(fp); | |
613 | } else { | |
614 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
615 | fatal("hash_host failed"); | |
616 | fprintf(f, "%s ", name); | |
617 | if (!key_write(public, f)) | |
618 | fatal("key_write failed"); | |
619 | fprintf(f, "\n"); | |
620 | } | |
bdffbcdc | 621 | } |
622 | ||
623 | static void | |
624 | do_known_hosts(struct passwd *pw, const char *name) | |
625 | { | |
626 | FILE *in, *out = stdout; | |
627 | Key *public; | |
628 | char *cp, *cp2, *kp, *kp2; | |
629 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
f8f89bae | 630 | int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; |
bdffbcdc | 631 | |
632 | if (!have_identity) { | |
633 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
634 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
635 | sizeof(identity_file)) | |
636 | fatal("Specified known hosts path too long"); | |
637 | xfree(cp); | |
638 | have_identity = 1; | |
639 | } | |
640 | if ((in = fopen(identity_file, "r")) == NULL) | |
641 | fatal("fopen: %s", strerror(errno)); | |
642 | ||
643 | /* | |
644 | * Find hosts goes to stdout, hash and deletions happen in-place | |
645 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
646 | */ | |
647 | if (!find_host && (hash_hosts || delete_host)) { | |
648 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
649 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
650 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
651 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
652 | fatal("known_hosts path too long"); | |
653 | umask(077); | |
654 | if ((c = mkstemp(tmp)) == -1) | |
655 | fatal("mkstemp: %s", strerror(errno)); | |
656 | if ((out = fdopen(c, "w")) == NULL) { | |
657 | c = errno; | |
658 | unlink(tmp); | |
659 | fatal("fdopen: %s", strerror(c)); | |
660 | } | |
661 | inplace = 1; | |
662 | } | |
663 | ||
664 | while (fgets(line, sizeof(line), in)) { | |
3e2d9453 | 665 | if ((cp = strchr(line, '\n')) == NULL) { |
f8f89bae | 666 | error("line %d too long: %.40s...", num + 1, line); |
bdffbcdc | 667 | skip = 1; |
668 | invalid = 1; | |
669 | continue; | |
670 | } | |
3e2d9453 | 671 | num++; |
bdffbcdc | 672 | if (skip) { |
673 | skip = 0; | |
674 | continue; | |
675 | } | |
3e2d9453 | 676 | *cp = '\0'; |
bdffbcdc | 677 | |
678 | /* Skip leading whitespace, empty and comment lines. */ | |
679 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
680 | ; | |
681 | if (!*cp || *cp == '\n' || *cp == '#') { | |
682 | if (inplace) | |
683 | fprintf(out, "%s\n", cp); | |
684 | continue; | |
685 | } | |
686 | /* Find the end of the host name portion. */ | |
687 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
688 | ; | |
689 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
690 | error("line %d missing key: %.40s...", | |
691 | num, line); | |
692 | invalid = 1; | |
693 | continue; | |
694 | } | |
695 | *kp++ = '\0'; | |
696 | kp2 = kp; | |
697 | ||
698 | public = key_new(KEY_RSA1); | |
699 | if (key_read(public, &kp) != 1) { | |
700 | kp = kp2; | |
701 | key_free(public); | |
702 | public = key_new(KEY_UNSPEC); | |
703 | if (key_read(public, &kp) != 1) { | |
704 | error("line %d invalid key: %.40s...", | |
705 | num, line); | |
706 | key_free(public); | |
707 | invalid = 1; | |
708 | continue; | |
709 | } | |
710 | } | |
711 | ||
712 | if (*cp == HASH_DELIM) { | |
713 | if (find_host || delete_host) { | |
714 | cp2 = host_hash(name, cp, strlen(cp)); | |
715 | if (cp2 == NULL) { | |
716 | error("line %d: invalid hashed " | |
717 | "name: %.64s...", num, line); | |
718 | invalid = 1; | |
719 | continue; | |
720 | } | |
721 | c = (strcmp(cp2, cp) == 0); | |
722 | if (find_host && c) { | |
723 | printf("# Host %s found: " | |
724 | "line %d type %s\n", name, | |
725 | num, key_type(public)); | |
726 | print_host(out, cp, public, 0); | |
727 | } | |
728 | if (delete_host && !c) | |
729 | print_host(out, cp, public, 0); | |
730 | } else if (hash_hosts) | |
731 | print_host(out, cp, public, 0); | |
732 | } else { | |
733 | if (find_host || delete_host) { | |
734 | c = (match_hostname(name, cp, | |
735 | strlen(cp)) == 1); | |
736 | if (find_host && c) { | |
737 | printf("# Host %s found: " | |
738 | "line %d type %s\n", name, | |
739 | num, key_type(public)); | |
ccc6beea | 740 | print_host(out, name, public, |
741 | hash_hosts); | |
bdffbcdc | 742 | } |
743 | if (delete_host && !c) | |
744 | print_host(out, cp, public, 0); | |
745 | } else if (hash_hosts) { | |
f8cc7664 | 746 | for (cp2 = strsep(&cp, ","); |
bdffbcdc | 747 | cp2 != NULL && *cp2 != '\0'; |
bc7119ba | 748 | cp2 = strsep(&cp, ",")) { |
749 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
750 | fprintf(stderr, "Warning: " | |
751 | "ignoring host name with " | |
752 | "metacharacters: %.64s\n", | |
753 | cp2); | |
754 | else | |
755 | print_host(out, cp2, public, 1); | |
756 | } | |
bdffbcdc | 757 | has_unhashed = 1; |
758 | } | |
759 | } | |
760 | key_free(public); | |
761 | } | |
762 | fclose(in); | |
763 | ||
764 | if (invalid) { | |
f8f89bae | 765 | fprintf(stderr, "%s is not a valid known_hosts file.\n", |
bdffbcdc | 766 | identity_file); |
767 | if (inplace) { | |
768 | fprintf(stderr, "Not replacing existing known_hosts " | |
604dac32 | 769 | "file because of errors\n"); |
bdffbcdc | 770 | fclose(out); |
771 | unlink(tmp); | |
772 | } | |
773 | exit(1); | |
774 | } | |
775 | ||
776 | if (inplace) { | |
777 | fclose(out); | |
778 | ||
779 | /* Backup existing file */ | |
780 | if (unlink(old) == -1 && errno != ENOENT) | |
781 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
782 | if (link(identity_file, old) == -1) | |
783 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
784 | strerror(errno)); | |
785 | /* Move new one into place */ | |
786 | if (rename(tmp, identity_file) == -1) { | |
787 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
788 | strerror(errno)); | |
789 | unlink(tmp); | |
790 | unlink(old); | |
791 | exit(1); | |
792 | } | |
793 | ||
794 | fprintf(stderr, "%s updated.\n", identity_file); | |
795 | fprintf(stderr, "Original contents retained as %s\n", old); | |
796 | if (has_unhashed) { | |
797 | fprintf(stderr, "WARNING: %s contains unhashed " | |
798 | "entries\n", old); | |
799 | fprintf(stderr, "Delete this file to ensure privacy " | |
4e2e5cfd | 800 | "of hostnames\n"); |
bdffbcdc | 801 | } |
802 | } | |
803 | ||
804 | exit(0); | |
805 | } | |
806 | ||
5260325f | 807 | /* |
808 | * Perform changing a passphrase. The argument is the passwd structure | |
809 | * for the current user. | |
810 | */ | |
396c147e | 811 | static void |
f095fcc7 | 812 | do_change_passphrase(struct passwd *pw) |
813 | { | |
5260325f | 814 | char *comment; |
815 | char *old_passphrase, *passphrase1, *passphrase2; | |
816 | struct stat st; | |
a306f2dd | 817 | Key *private; |
5260325f | 818 | |
819 | if (!have_identity) | |
820 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 821 | if (stat(identity_file, &st) < 0) { |
822 | perror(identity_file); | |
823 | exit(1); | |
824 | } | |
5260325f | 825 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 826 | private = key_load_private(identity_file, "", &comment); |
827 | if (private == NULL) { | |
5260325f | 828 | if (identity_passphrase) |
829 | old_passphrase = xstrdup(identity_passphrase); | |
830 | else | |
1843a425 | 831 | old_passphrase = |
832 | read_passphrase("Enter old passphrase: ", | |
833 | RP_ALLOW_STDIN); | |
834 | private = key_load_private(identity_file, old_passphrase, | |
835 | &comment); | |
aeaa3d9e | 836 | memset(old_passphrase, 0, strlen(old_passphrase)); |
837 | xfree(old_passphrase); | |
838 | if (private == NULL) { | |
5260325f | 839 | printf("Bad passphrase.\n"); |
840 | exit(1); | |
841 | } | |
5260325f | 842 | } |
843 | printf("Key has comment '%s'\n", comment); | |
844 | ||
845 | /* Ask the new passphrase (twice). */ | |
846 | if (identity_new_passphrase) { | |
847 | passphrase1 = xstrdup(identity_new_passphrase); | |
848 | passphrase2 = NULL; | |
849 | } else { | |
850 | passphrase1 = | |
1843a425 | 851 | read_passphrase("Enter new passphrase (empty for no " |
852 | "passphrase): ", RP_ALLOW_STDIN); | |
853 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
184eed6a | 854 | RP_ALLOW_STDIN); |
5260325f | 855 | |
856 | /* Verify that they are the same. */ | |
857 | if (strcmp(passphrase1, passphrase2) != 0) { | |
858 | memset(passphrase1, 0, strlen(passphrase1)); | |
859 | memset(passphrase2, 0, strlen(passphrase2)); | |
860 | xfree(passphrase1); | |
861 | xfree(passphrase2); | |
862 | printf("Pass phrases do not match. Try again.\n"); | |
863 | exit(1); | |
864 | } | |
865 | /* Destroy the other copy. */ | |
866 | memset(passphrase2, 0, strlen(passphrase2)); | |
867 | xfree(passphrase2); | |
8efc0c15 | 868 | } |
8efc0c15 | 869 | |
5260325f | 870 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 871 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 872 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 873 | memset(passphrase1, 0, strlen(passphrase1)); |
874 | xfree(passphrase1); | |
a306f2dd | 875 | key_free(private); |
5260325f | 876 | xfree(comment); |
877 | exit(1); | |
878 | } | |
879 | /* Destroy the passphrase and the copy of the key in memory. */ | |
880 | memset(passphrase1, 0, strlen(passphrase1)); | |
881 | xfree(passphrase1); | |
a306f2dd | 882 | key_free(private); /* Destroys contents */ |
5260325f | 883 | xfree(comment); |
884 | ||
885 | printf("Your identification has been saved with the new passphrase.\n"); | |
886 | exit(0); | |
887 | } | |
8efc0c15 | 888 | |
21289cd0 | 889 | /* |
890 | * Print the SSHFP RR. | |
891 | */ | |
3eff92ec | 892 | static int |
893 | do_print_resource_record(struct passwd *pw, char *fname, char *hname) | |
21289cd0 | 894 | { |
895 | Key *public; | |
896 | char *comment = NULL; | |
897 | struct stat st; | |
898 | ||
3eff92ec | 899 | if (fname == NULL) |
21289cd0 | 900 | ask_filename(pw, "Enter file in which the key is"); |
3eff92ec | 901 | if (stat(fname, &st) < 0) { |
902 | if (errno == ENOENT) | |
903 | return 0; | |
904 | perror(fname); | |
21289cd0 | 905 | exit(1); |
906 | } | |
3eff92ec | 907 | public = key_load_public(fname, &comment); |
21289cd0 | 908 | if (public != NULL) { |
ca75d7de | 909 | export_dns_rr(hname, public, stdout, print_generic); |
21289cd0 | 910 | key_free(public); |
911 | xfree(comment); | |
3eff92ec | 912 | return 1; |
21289cd0 | 913 | } |
914 | if (comment) | |
915 | xfree(comment); | |
916 | ||
3eff92ec | 917 | printf("failed to read v2 public key from %s.\n", fname); |
21289cd0 | 918 | exit(1); |
919 | } | |
21289cd0 | 920 | |
5260325f | 921 | /* |
922 | * Change the comment of a private key file. | |
923 | */ | |
396c147e | 924 | static void |
8efc0c15 | 925 | do_change_comment(struct passwd *pw) |
926 | { | |
1c9a907f | 927 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 928 | Key *private; |
929 | Key *public; | |
5260325f | 930 | struct stat st; |
931 | FILE *f; | |
1c9a907f | 932 | int fd; |
5260325f | 933 | |
934 | if (!have_identity) | |
935 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 936 | if (stat(identity_file, &st) < 0) { |
937 | perror(identity_file); | |
938 | exit(1); | |
939 | } | |
aeaa3d9e | 940 | private = key_load_private(identity_file, "", &comment); |
941 | if (private == NULL) { | |
5260325f | 942 | if (identity_passphrase) |
943 | passphrase = xstrdup(identity_passphrase); | |
944 | else if (identity_new_passphrase) | |
945 | passphrase = xstrdup(identity_new_passphrase); | |
946 | else | |
1843a425 | 947 | passphrase = read_passphrase("Enter passphrase: ", |
948 | RP_ALLOW_STDIN); | |
5260325f | 949 | /* Try to load using the passphrase. */ |
aeaa3d9e | 950 | private = key_load_private(identity_file, passphrase, &comment); |
951 | if (private == NULL) { | |
5260325f | 952 | memset(passphrase, 0, strlen(passphrase)); |
953 | xfree(passphrase); | |
954 | printf("Bad passphrase.\n"); | |
955 | exit(1); | |
956 | } | |
aeaa3d9e | 957 | } else { |
958 | passphrase = xstrdup(""); | |
5260325f | 959 | } |
aeaa3d9e | 960 | if (private->type != KEY_RSA1) { |
961 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
962 | key_free(private); | |
963 | exit(1); | |
184eed6a | 964 | } |
5260325f | 965 | printf("Key now has comment '%s'\n", comment); |
966 | ||
967 | if (identity_comment) { | |
968 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
969 | } else { | |
970 | printf("Enter new comment: "); | |
971 | fflush(stdout); | |
972 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
973 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 974 | key_free(private); |
5260325f | 975 | exit(1); |
976 | } | |
b05117ac | 977 | new_comment[strcspn(new_comment, "\n")] = '\0'; |
5260325f | 978 | } |
979 | ||
980 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 981 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
58cfa257 | 982 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 983 | memset(passphrase, 0, strlen(passphrase)); |
984 | xfree(passphrase); | |
a306f2dd | 985 | key_free(private); |
5260325f | 986 | xfree(comment); |
987 | exit(1); | |
8efc0c15 | 988 | } |
5260325f | 989 | memset(passphrase, 0, strlen(passphrase)); |
990 | xfree(passphrase); | |
aeaa3d9e | 991 | public = key_from_private(private); |
a306f2dd | 992 | key_free(private); |
5260325f | 993 | |
5260325f | 994 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 995 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
996 | if (fd == -1) { | |
5260325f | 997 | printf("Could not save your public key in %s\n", identity_file); |
998 | exit(1); | |
999 | } | |
1c9a907f | 1000 | f = fdopen(fd, "w"); |
1001 | if (f == NULL) { | |
1002 | printf("fdopen %s failed", identity_file); | |
1003 | exit(1); | |
1004 | } | |
a306f2dd | 1005 | if (!key_write(public, f)) |
1006 | fprintf(stderr, "write key failed"); | |
1007 | key_free(public); | |
1008 | fprintf(f, " %s\n", new_comment); | |
5260325f | 1009 | fclose(f); |
1010 | ||
1011 | xfree(comment); | |
1012 | ||
1013 | printf("The comment in your key file has been changed.\n"); | |
1014 | exit(0); | |
8efc0c15 | 1015 | } |
1016 | ||
396c147e | 1017 | static void |
5ad13cd7 | 1018 | usage(void) |
1019 | { | |
269cfc8a | 1020 | fprintf(stderr, "usage: %s [options]\n", __progname); |
58153e34 | 1021 | fprintf(stderr, "Options:\n"); |
4feb61af | 1022 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
1023 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
58153e34 | 1024 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
4feb61af | 1025 | fprintf(stderr, " -C comment Provide new comment.\n"); |
58153e34 | 1026 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
4feb61af | 1027 | #ifdef SMARTCARD |
1028 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
1029 | #endif /* SMARTCARD */ | |
e91a8c3f | 1030 | fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n"); |
4feb61af | 1031 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
58153e34 | 1032 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
4feb61af | 1033 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
21289cd0 | 1034 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
4feb61af | 1035 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
e91a8c3f | 1036 | fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n"); |
58153e34 | 1037 | fprintf(stderr, " -l Show fingerprint of key file.\n"); |
4feb61af | 1038 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
58153e34 | 1039 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
1040 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
4feb61af | 1041 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
1042 | fprintf(stderr, " -q Quiet.\n"); | |
1043 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
21289cd0 | 1044 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
4feb61af | 1045 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
1046 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
1047 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
58153e34 | 1048 | #ifdef SMARTCARD |
58153e34 | 1049 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
1050 | #endif /* SMARTCARD */ | |
4feb61af | 1051 | fprintf(stderr, " -v Verbose.\n"); |
1052 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
1053 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
c35a6dc5 | 1054 | |
5260325f | 1055 | exit(1); |
5ad13cd7 | 1056 | } |
1057 | ||
5260325f | 1058 | /* |
1059 | * Main program for key management. | |
1060 | */ | |
8efc0c15 | 1061 | int |
4b4810d4 | 1062 | main(int argc, char **argv) |
8efc0c15 | 1063 | { |
3dc93cd8 | 1064 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
8f52069e | 1065 | char out_file[MAXPATHLEN], *reader_id = NULL; |
bdffbcdc | 1066 | char *rr_hostname = NULL; |
1c9a907f | 1067 | Key *private, *public; |
5260325f | 1068 | struct passwd *pw; |
5260325f | 1069 | struct stat st; |
c784ae09 | 1070 | int opt, type, fd, download = 0; |
2a1995a3 | 1071 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; |
c35a6dc5 | 1072 | int do_gen_candidates = 0, do_screen_candidates = 0; |
c6fbc95a | 1073 | int log_level = SYSLOG_LEVEL_INFO; |
c35a6dc5 | 1074 | BIGNUM *start = NULL; |
5260325f | 1075 | FILE *f; |
de4feb6b | 1076 | const char *errstr; |
fa08c86b | 1077 | |
5260325f | 1078 | extern int optind; |
1079 | extern char *optarg; | |
1080 | ||
fd6168c1 | 1081 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1082 | sanitise_stdfd(); | |
1083 | ||
b05ff3f5 | 1084 | __progname = ssh_get_progname(argv[0]); |
264dce47 | 1085 | |
fa649821 | 1086 | SSLeay_add_all_algorithms(); |
4b4810d4 | 1087 | log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
c35a6dc5 | 1088 | |
ce88d9df | 1089 | init_rng(); |
1090 | seed_rng(); | |
a306f2dd | 1091 | |
aa3378df | 1092 | /* we need this for the home * directory. */ |
5260325f | 1093 | pw = getpwuid(getuid()); |
1094 | if (!pw) { | |
1095 | printf("You don't exist, go away!\n"); | |
1096 | exit(1); | |
1097 | } | |
a306f2dd | 1098 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
1099 | perror("gethostname"); | |
1100 | exit(1); | |
1101 | } | |
aa3378df | 1102 | |
4b4810d4 | 1103 | while ((opt = getopt(argc, argv, |
bdffbcdc | 1104 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
5260325f | 1105 | switch (opt) { |
1106 | case 'b': | |
0fe9892f | 1107 | bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr); |
de4feb6b | 1108 | if (errstr) |
1109 | fatal("Bits has bad value %s (%s)", | |
1110 | optarg, errstr); | |
5260325f | 1111 | break; |
bdffbcdc | 1112 | case 'F': |
1113 | find_host = 1; | |
1114 | rr_hostname = optarg; | |
1115 | break; | |
1116 | case 'H': | |
1117 | hash_hosts = 1; | |
1118 | break; | |
1119 | case 'R': | |
1120 | delete_host = 1; | |
1121 | rr_hostname = optarg; | |
1122 | break; | |
5260325f | 1123 | case 'l': |
1124 | print_fingerprint = 1; | |
1125 | break; | |
aaf45d87 | 1126 | case 'B': |
1127 | print_bubblebabble = 1; | |
1128 | break; | |
5260325f | 1129 | case 'p': |
1130 | change_passphrase = 1; | |
1131 | break; | |
5260325f | 1132 | case 'c': |
1133 | change_comment = 1; | |
1134 | break; | |
5260325f | 1135 | case 'f': |
c784ae09 | 1136 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1137 | sizeof(identity_file)) | |
1138 | fatal("Identity filename too long"); | |
5260325f | 1139 | have_identity = 1; |
1140 | break; | |
21289cd0 | 1141 | case 'g': |
1142 | print_generic = 1; | |
1143 | break; | |
5260325f | 1144 | case 'P': |
1145 | identity_passphrase = optarg; | |
1146 | break; | |
5260325f | 1147 | case 'N': |
1148 | identity_new_passphrase = optarg; | |
1149 | break; | |
5260325f | 1150 | case 'C': |
1151 | identity_comment = optarg; | |
1152 | break; | |
5260325f | 1153 | case 'q': |
1154 | quiet = 1; | |
1155 | break; | |
5deceabb | 1156 | case 'e': |
a306f2dd | 1157 | case 'x': |
5deceabb | 1158 | /* export key */ |
a306f2dd | 1159 | convert_to_ssh2 = 1; |
1160 | break; | |
5deceabb | 1161 | case 'i': |
a306f2dd | 1162 | case 'X': |
5deceabb | 1163 | /* import key */ |
a306f2dd | 1164 | convert_from_ssh2 = 1; |
1165 | break; | |
a306f2dd | 1166 | case 'y': |
1167 | print_public = 1; | |
1168 | break; | |
a306f2dd | 1169 | case 'd': |
fa08c86b | 1170 | key_type_name = "dsa"; |
a306f2dd | 1171 | break; |
fa08c86b | 1172 | case 't': |
1173 | key_type_name = optarg; | |
fa08c86b | 1174 | break; |
93a56445 | 1175 | case 'D': |
1176 | download = 1; | |
32596c7b | 1177 | /*FALLTHROUGH*/ |
285d2b15 | 1178 | case 'U': |
93a56445 | 1179 | reader_id = optarg; |
2b30154a | 1180 | break; |
c6fbc95a | 1181 | case 'v': |
1182 | if (log_level == SYSLOG_LEVEL_INFO) | |
1183 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1184 | else { | |
f2107e97 | 1185 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
c6fbc95a | 1186 | log_level < SYSLOG_LEVEL_DEBUG3) |
1187 | log_level++; | |
1188 | } | |
1189 | break; | |
21289cd0 | 1190 | case 'r': |
bdffbcdc | 1191 | rr_hostname = optarg; |
21289cd0 | 1192 | break; |
c35a6dc5 | 1193 | case 'W': |
0fe9892f | 1194 | generator_wanted = (u_int32_t)strtonum(optarg, 1, |
1195 | UINT_MAX, &errstr); | |
c784ae09 | 1196 | if (errstr) |
1197 | fatal("Desired generator has bad value: %s (%s)", | |
1198 | optarg, errstr); | |
c35a6dc5 | 1199 | break; |
1200 | case 'a': | |
0fe9892f | 1201 | trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1202 | if (errstr) |
1203 | fatal("Invalid number of trials: %s (%s)", | |
1204 | optarg, errstr); | |
c35a6dc5 | 1205 | break; |
1206 | case 'M': | |
0fe9892f | 1207 | memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1208 | if (errstr) { |
1209 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1210 | } | |
c35a6dc5 | 1211 | break; |
1212 | case 'G': | |
1213 | do_gen_candidates = 1; | |
c784ae09 | 1214 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1215 | sizeof(out_file)) | |
1216 | fatal("Output filename too long"); | |
c35a6dc5 | 1217 | break; |
1218 | case 'T': | |
1219 | do_screen_candidates = 1; | |
c784ae09 | 1220 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1221 | sizeof(out_file)) | |
1222 | fatal("Output filename too long"); | |
c35a6dc5 | 1223 | break; |
1224 | case 'S': | |
1225 | /* XXX - also compare length against bits */ | |
1226 | if (BN_hex2bn(&start, optarg) == 0) | |
1227 | fatal("Invalid start point."); | |
1228 | break; | |
5260325f | 1229 | case '?': |
1230 | default: | |
1231 | usage(); | |
1232 | } | |
1233 | } | |
c6fbc95a | 1234 | |
1235 | /* reinit */ | |
4b4810d4 | 1236 | log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); |
c6fbc95a | 1237 | |
4b4810d4 | 1238 | if (optind < argc) { |
5260325f | 1239 | printf("Too many arguments.\n"); |
1240 | usage(); | |
1241 | } | |
1242 | if (change_passphrase && change_comment) { | |
1243 | printf("Can only have one of -p and -c.\n"); | |
1244 | usage(); | |
1245 | } | |
048acbeb | 1246 | if (print_fingerprint && (delete_host || hash_hosts)) { |
1247 | printf("Cannot use -l with -D or -R.\n"); | |
1248 | usage(); | |
1249 | } | |
bdffbcdc | 1250 | if (delete_host || hash_hosts || find_host) |
1251 | do_known_hosts(pw, rr_hostname); | |
aaf45d87 | 1252 | if (print_fingerprint || print_bubblebabble) |
5260325f | 1253 | do_fingerprint(pw); |
5260325f | 1254 | if (change_passphrase) |
1255 | do_change_passphrase(pw); | |
633151a3 | 1256 | if (change_comment) |
1257 | do_change_comment(pw); | |
ce88d9df | 1258 | if (convert_to_ssh2) |
1259 | do_convert_to_ssh2(pw); | |
1260 | if (convert_from_ssh2) | |
1261 | do_convert_from_ssh2(pw); | |
a306f2dd | 1262 | if (print_public) |
1263 | do_print_public(pw); | |
bdffbcdc | 1264 | if (rr_hostname != NULL) { |
3eff92ec | 1265 | unsigned int n = 0; |
1266 | ||
1267 | if (have_identity) { | |
1268 | n = do_print_resource_record(pw, | |
1269 | identity_file, rr_hostname); | |
1270 | if (n == 0) { | |
1271 | perror(identity_file); | |
1272 | exit(1); | |
1273 | } | |
1274 | exit(0); | |
1275 | } else { | |
1276 | ||
1277 | n += do_print_resource_record(pw, | |
1278 | _PATH_HOST_RSA_KEY_FILE, rr_hostname); | |
1279 | n += do_print_resource_record(pw, | |
1280 | _PATH_HOST_DSA_KEY_FILE, rr_hostname); | |
1281 | ||
1282 | if (n == 0) | |
1283 | fatal("no keys found."); | |
1284 | exit(0); | |
1285 | } | |
21289cd0 | 1286 | } |
93a56445 | 1287 | if (reader_id != NULL) { |
4f831fd7 | 1288 | #ifdef SMARTCARD |
93a56445 | 1289 | if (download) |
1290 | do_download(pw, reader_id); | |
1291 | else | |
1292 | do_upload(pw, reader_id); | |
3e984472 | 1293 | #else /* SMARTCARD */ |
4f831fd7 | 1294 | fatal("no support for smartcards."); |
3e984472 | 1295 | #endif /* SMARTCARD */ |
93a56445 | 1296 | } |
5260325f | 1297 | |
c35a6dc5 | 1298 | if (do_gen_candidates) { |
1299 | FILE *out = fopen(out_file, "w"); | |
b6453d99 | 1300 | |
c35a6dc5 | 1301 | if (out == NULL) { |
1302 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1303 | out_file, strerror(errno)); | |
1304 | return (1); | |
1305 | } | |
255d3e00 | 1306 | if (bits == 0) |
1307 | bits = DEFAULT_BITS; | |
c35a6dc5 | 1308 | if (gen_candidates(out, memory, bits, start) != 0) |
17318dd6 | 1309 | fatal("modulus candidate generation failed"); |
c35a6dc5 | 1310 | |
1311 | return (0); | |
1312 | } | |
1313 | ||
1314 | if (do_screen_candidates) { | |
1315 | FILE *in; | |
1316 | FILE *out = fopen(out_file, "w"); | |
1317 | ||
1318 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1319 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1320 | fatal("Couldn't open modulus candidate " | |
aff51935 | 1321 | "file \"%s\": %s", identity_file, |
c35a6dc5 | 1322 | strerror(errno)); |
1323 | } | |
1324 | } else | |
1325 | in = stdin; | |
1326 | ||
1327 | if (out == NULL) { | |
1328 | fatal("Couldn't open moduli file \"%s\": %s", | |
1329 | out_file, strerror(errno)); | |
1330 | } | |
1331 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
17318dd6 | 1332 | fatal("modulus screening failed"); |
08d035b6 | 1333 | return (0); |
c35a6dc5 | 1334 | } |
1335 | ||
5260325f | 1336 | arc4random_stir(); |
1337 | ||
882c9d5a | 1338 | if (key_type_name == NULL) |
1339 | key_type_name = "rsa"; | |
1340 | ||
c523303b | 1341 | type = key_type_from_name(key_type_name); |
1342 | if (type == KEY_UNSPEC) { | |
1343 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1344 | exit(1); | |
a306f2dd | 1345 | } |
255d3e00 | 1346 | if (bits == 0) |
1347 | bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; | |
6e94bd72 | 1348 | if (type == KEY_DSA && bits != 1024) |
1349 | fatal("DSA keys must be 1024 bits"); | |
60dc0294 | 1350 | if (!quiet) |
1351 | printf("Generating public/private %s key pair.\n", key_type_name); | |
fa08c86b | 1352 | private = key_generate(type, bits); |
1353 | if (private == NULL) { | |
1354 | fprintf(stderr, "key_generate failed"); | |
1355 | exit(1); | |
1356 | } | |
1357 | public = key_from_private(private); | |
5260325f | 1358 | |
1359 | if (!have_identity) | |
1360 | ask_filename(pw, "Enter file in which to save the key"); | |
1361 | ||
7b9b0103 | 1362 | /* Create ~/.ssh directory if it doesn't already exist. */ |
42f11eb2 | 1363 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 1364 | if (strstr(identity_file, dotsshdir) != NULL && |
1365 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 1366 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 1367 | error("Could not create directory '%s'.", dotsshdir); |
1368 | else if (!quiet) | |
1369 | printf("Created directory '%s'.\n", dotsshdir); | |
1370 | } | |
1371 | /* If the file already exists, ask the user to confirm. */ | |
1372 | if (stat(identity_file, &st) >= 0) { | |
1373 | char yesno[3]; | |
1374 | printf("%s already exists.\n", identity_file); | |
1375 | printf("Overwrite (y/n)? "); | |
1376 | fflush(stdout); | |
1377 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1378 | exit(1); | |
1379 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1380 | exit(1); | |
1381 | } | |
1382 | /* Ask for a passphrase (twice). */ | |
1383 | if (identity_passphrase) | |
1384 | passphrase1 = xstrdup(identity_passphrase); | |
1385 | else if (identity_new_passphrase) | |
1386 | passphrase1 = xstrdup(identity_new_passphrase); | |
1387 | else { | |
1388 | passphrase_again: | |
1389 | passphrase1 = | |
1843a425 | 1390 | read_passphrase("Enter passphrase (empty for no " |
1391 | "passphrase): ", RP_ALLOW_STDIN); | |
1392 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1393 | RP_ALLOW_STDIN); | |
5260325f | 1394 | if (strcmp(passphrase1, passphrase2) != 0) { |
1843a425 | 1395 | /* |
1396 | * The passphrases do not match. Clear them and | |
1397 | * retry. | |
1398 | */ | |
5260325f | 1399 | memset(passphrase1, 0, strlen(passphrase1)); |
1400 | memset(passphrase2, 0, strlen(passphrase2)); | |
1401 | xfree(passphrase1); | |
1402 | xfree(passphrase2); | |
1403 | printf("Passphrases do not match. Try again.\n"); | |
1404 | goto passphrase_again; | |
1405 | } | |
1406 | /* Clear the other copy of the passphrase. */ | |
1407 | memset(passphrase2, 0, strlen(passphrase2)); | |
1408 | xfree(passphrase2); | |
1409 | } | |
1410 | ||
5260325f | 1411 | if (identity_comment) { |
1412 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1413 | } else { | |
6ae2364d | 1414 | /* Create default commend field for the passphrase. */ |
5260325f | 1415 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
1416 | } | |
1417 | ||
1418 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 1419 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 1420 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 1421 | memset(passphrase1, 0, strlen(passphrase1)); |
1422 | xfree(passphrase1); | |
1423 | exit(1); | |
1424 | } | |
1425 | /* Clear the passphrase. */ | |
1426 | memset(passphrase1, 0, strlen(passphrase1)); | |
1427 | xfree(passphrase1); | |
1428 | ||
1429 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 1430 | key_free(private); |
5260325f | 1431 | arc4random_stir(); |
1432 | ||
1433 | if (!quiet) | |
1434 | printf("Your identification has been saved in %s.\n", identity_file); | |
1435 | ||
5260325f | 1436 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1437 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1438 | if (fd == -1) { | |
5260325f | 1439 | printf("Could not save your public key in %s\n", identity_file); |
1440 | exit(1); | |
1441 | } | |
1c9a907f | 1442 | f = fdopen(fd, "w"); |
1443 | if (f == NULL) { | |
1444 | printf("fdopen %s failed", identity_file); | |
1445 | exit(1); | |
1446 | } | |
a306f2dd | 1447 | if (!key_write(public, f)) |
1448 | fprintf(stderr, "write key failed"); | |
1449 | fprintf(f, " %s\n", comment); | |
5260325f | 1450 | fclose(f); |
1451 | ||
1452 | if (!quiet) { | |
22138a36 | 1453 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 1454 | printf("Your public key has been saved in %s.\n", |
1455 | identity_file); | |
5260325f | 1456 | printf("The key fingerprint is:\n"); |
22138a36 | 1457 | printf("%s %s\n", fp, comment); |
1458 | xfree(fp); | |
8efc0c15 | 1459 | } |
a306f2dd | 1460 | |
1461 | key_free(public); | |
5260325f | 1462 | exit(0); |
8efc0c15 | 1463 | } |