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e91a8c3f | 1 | /* $OpenBSD: ssh-keygen.c,v 1.159 2007/01/12 20:20:41 jmc 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> | |
a306f2dd | 24 | |
028094f4 | 25 | #include <errno.h> |
d3221cca | 26 | #include <fcntl.h> |
28cb0a43 | 27 | #include <netdb.h> |
42685763 | 28 | #ifdef HAVE_PATHS_H |
29 | # include <paths.h> | |
30 | #endif | |
b1842393 | 31 | #include <pwd.h> |
24436b92 | 32 | #include <stdarg.h> |
cf851879 | 33 | #include <stdio.h> |
ffa517a8 | 34 | #include <stdlib.h> |
00146caa | 35 | #include <string.h> |
5188ba17 | 36 | #include <unistd.h> |
b1842393 | 37 | |
8efc0c15 | 38 | #include "xmalloc.h" |
a306f2dd | 39 | #include "key.h" |
457fc0c6 | 40 | #include "rsa.h" |
a306f2dd | 41 | #include "authfile.h" |
42 | #include "uuencode.h" | |
94ec8c6b | 43 | #include "buffer.h" |
42f11eb2 | 44 | #include "pathnames.h" |
45 | #include "log.h" | |
58ae9cb8 | 46 | #include "misc.h" |
bdffbcdc | 47 | #include "match.h" |
48 | #include "hostfile.h" | |
0cbe25f0 | 49 | #include "dns.h" |
94ec8c6b | 50 | |
93a56445 | 51 | #ifdef SMARTCARD |
93a56445 | 52 | #include "scard.h" |
dd2495cb | 53 | #endif |
2b30154a | 54 | |
255d3e00 | 55 | /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ |
56 | #define DEFAULT_BITS 2048 | |
57 | #define DEFAULT_BITS_DSA 1024 | |
58 | u_int32_t bits = 0; | |
8efc0c15 | 59 | |
aa3378df | 60 | /* |
61 | * Flag indicating that we just want to change the passphrase. This can be | |
62 | * set on the command line. | |
63 | */ | |
8efc0c15 | 64 | int change_passphrase = 0; |
65 | ||
aa3378df | 66 | /* |
67 | * Flag indicating that we just want to change the comment. This can be set | |
68 | * on the command line. | |
69 | */ | |
8efc0c15 | 70 | int change_comment = 0; |
71 | ||
72 | int quiet = 0; | |
73 | ||
bdffbcdc | 74 | /* Flag indicating that we want to hash a known_hosts file */ |
75 | int hash_hosts = 0; | |
76 | /* Flag indicating that we want lookup a host in known_hosts file */ | |
77 | int find_host = 0; | |
78 | /* Flag indicating that we want to delete a host from a known_hosts file */ | |
79 | int delete_host = 0; | |
80 | ||
f095fcc7 | 81 | /* Flag indicating that we just want to see the key fingerprint */ |
82 | int print_fingerprint = 0; | |
aaf45d87 | 83 | int print_bubblebabble = 0; |
f095fcc7 | 84 | |
5ad13cd7 | 85 | /* The identity file name, given on the command line or entered by the user. */ |
86 | char identity_file[1024]; | |
87 | int have_identity = 0; | |
8efc0c15 | 88 | |
89 | /* This is set to the passphrase if given on the command line. */ | |
90 | char *identity_passphrase = NULL; | |
91 | ||
92 | /* This is set to the new passphrase if given on the command line. */ | |
93 | char *identity_new_passphrase = NULL; | |
94 | ||
95 | /* This is set to the new comment if given on the command line. */ | |
96 | char *identity_comment = NULL; | |
97 | ||
a306f2dd | 98 | /* Dump public key file in format used by real and the original SSH 2 */ |
99 | int convert_to_ssh2 = 0; | |
100 | int convert_from_ssh2 = 0; | |
101 | int print_public = 0; | |
21289cd0 | 102 | int print_generic = 0; |
fa08c86b | 103 | |
3dc93cd8 | 104 | char *key_type_name = NULL; |
a306f2dd | 105 | |
5ad13cd7 | 106 | /* argv0 */ |
107 | extern char *__progname; | |
8efc0c15 | 108 | |
a306f2dd | 109 | char hostname[MAXHOSTNAMELEN]; |
110 | ||
20eea1d7 | 111 | /* moduli.c */ |
c784ae09 | 112 | int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
20eea1d7 | 113 | int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
114 | ||
396c147e | 115 | static void |
5ad13cd7 | 116 | ask_filename(struct passwd *pw, const char *prompt) |
8efc0c15 | 117 | { |
5260325f | 118 | char buf[1024]; |
c523303b | 119 | char *name = NULL; |
120 | ||
8d22d775 | 121 | if (key_type_name == NULL) |
42f11eb2 | 122 | name = _PATH_SSH_CLIENT_ID_RSA; |
32596c7b | 123 | else { |
8d22d775 | 124 | switch (key_type_from_name(key_type_name)) { |
125 | case KEY_RSA1: | |
126 | name = _PATH_SSH_CLIENT_IDENTITY; | |
127 | break; | |
128 | case KEY_DSA: | |
129 | name = _PATH_SSH_CLIENT_ID_DSA; | |
130 | break; | |
131 | case KEY_RSA: | |
132 | name = _PATH_SSH_CLIENT_ID_RSA; | |
133 | break; | |
134 | default: | |
135 | fprintf(stderr, "bad key type"); | |
136 | exit(1); | |
137 | break; | |
138 | } | |
32596c7b | 139 | } |
c523303b | 140 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
8d88011e | 141 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
5260325f | 142 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
143 | exit(1); | |
144 | if (strchr(buf, '\n')) | |
145 | *strchr(buf, '\n') = 0; | |
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 | ||
244 | magic = buffer_get_int(&b); | |
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: | |
2e0becb6 | 287 | e = buffer_get_char(&b); |
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; |
17a3011c | 508 | int i, skip = 0, num = 1, invalid = 1; |
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)) { |
539 | i = strlen(line) - 1; | |
540 | if (line[i] != '\n') { | |
541 | error("line %d too long: %.40s...", num, line); | |
542 | skip = 1; | |
543 | continue; | |
544 | } | |
545 | num++; | |
546 | if (skip) { | |
547 | skip = 0; | |
548 | continue; | |
549 | } | |
550 | line[i] = '\0'; | |
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 |
601 | print_host(FILE *f, char *name, Key *public, int hash) | |
602 | { | |
603 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
604 | fatal("hash_host failed"); | |
605 | fprintf(f, "%s ", name); | |
606 | if (!key_write(public, f)) | |
607 | fatal("key_write failed"); | |
608 | fprintf(f, "\n"); | |
609 | } | |
610 | ||
611 | static void | |
612 | do_known_hosts(struct passwd *pw, const char *name) | |
613 | { | |
614 | FILE *in, *out = stdout; | |
615 | Key *public; | |
616 | char *cp, *cp2, *kp, *kp2; | |
617 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
618 | int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; | |
619 | ||
620 | if (!have_identity) { | |
621 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
622 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
623 | sizeof(identity_file)) | |
624 | fatal("Specified known hosts path too long"); | |
625 | xfree(cp); | |
626 | have_identity = 1; | |
627 | } | |
628 | if ((in = fopen(identity_file, "r")) == NULL) | |
629 | fatal("fopen: %s", strerror(errno)); | |
630 | ||
631 | /* | |
632 | * Find hosts goes to stdout, hash and deletions happen in-place | |
633 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
634 | */ | |
635 | if (!find_host && (hash_hosts || delete_host)) { | |
636 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
637 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
638 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
639 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
640 | fatal("known_hosts path too long"); | |
641 | umask(077); | |
642 | if ((c = mkstemp(tmp)) == -1) | |
643 | fatal("mkstemp: %s", strerror(errno)); | |
644 | if ((out = fdopen(c, "w")) == NULL) { | |
645 | c = errno; | |
646 | unlink(tmp); | |
647 | fatal("fdopen: %s", strerror(c)); | |
648 | } | |
649 | inplace = 1; | |
650 | } | |
651 | ||
652 | while (fgets(line, sizeof(line), in)) { | |
653 | num++; | |
654 | i = strlen(line) - 1; | |
655 | if (line[i] != '\n') { | |
656 | error("line %d too long: %.40s...", num, line); | |
657 | skip = 1; | |
658 | invalid = 1; | |
659 | continue; | |
660 | } | |
661 | if (skip) { | |
662 | skip = 0; | |
663 | continue; | |
664 | } | |
665 | line[i] = '\0'; | |
666 | ||
667 | /* Skip leading whitespace, empty and comment lines. */ | |
668 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
669 | ; | |
670 | if (!*cp || *cp == '\n' || *cp == '#') { | |
671 | if (inplace) | |
672 | fprintf(out, "%s\n", cp); | |
673 | continue; | |
674 | } | |
675 | /* Find the end of the host name portion. */ | |
676 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
677 | ; | |
678 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
679 | error("line %d missing key: %.40s...", | |
680 | num, line); | |
681 | invalid = 1; | |
682 | continue; | |
683 | } | |
684 | *kp++ = '\0'; | |
685 | kp2 = kp; | |
686 | ||
687 | public = key_new(KEY_RSA1); | |
688 | if (key_read(public, &kp) != 1) { | |
689 | kp = kp2; | |
690 | key_free(public); | |
691 | public = key_new(KEY_UNSPEC); | |
692 | if (key_read(public, &kp) != 1) { | |
693 | error("line %d invalid key: %.40s...", | |
694 | num, line); | |
695 | key_free(public); | |
696 | invalid = 1; | |
697 | continue; | |
698 | } | |
699 | } | |
700 | ||
701 | if (*cp == HASH_DELIM) { | |
702 | if (find_host || delete_host) { | |
703 | cp2 = host_hash(name, cp, strlen(cp)); | |
704 | if (cp2 == NULL) { | |
705 | error("line %d: invalid hashed " | |
706 | "name: %.64s...", num, line); | |
707 | invalid = 1; | |
708 | continue; | |
709 | } | |
710 | c = (strcmp(cp2, cp) == 0); | |
711 | if (find_host && c) { | |
712 | printf("# Host %s found: " | |
713 | "line %d type %s\n", name, | |
714 | num, key_type(public)); | |
715 | print_host(out, cp, public, 0); | |
716 | } | |
717 | if (delete_host && !c) | |
718 | print_host(out, cp, public, 0); | |
719 | } else if (hash_hosts) | |
720 | print_host(out, cp, public, 0); | |
721 | } else { | |
722 | if (find_host || delete_host) { | |
723 | c = (match_hostname(name, cp, | |
724 | strlen(cp)) == 1); | |
725 | if (find_host && c) { | |
726 | printf("# Host %s found: " | |
727 | "line %d type %s\n", name, | |
728 | num, key_type(public)); | |
729 | print_host(out, cp, public, hash_hosts); | |
730 | } | |
731 | if (delete_host && !c) | |
732 | print_host(out, cp, public, 0); | |
733 | } else if (hash_hosts) { | |
f8cc7664 | 734 | for (cp2 = strsep(&cp, ","); |
bdffbcdc | 735 | cp2 != NULL && *cp2 != '\0'; |
bc7119ba | 736 | cp2 = strsep(&cp, ",")) { |
737 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
738 | fprintf(stderr, "Warning: " | |
739 | "ignoring host name with " | |
740 | "metacharacters: %.64s\n", | |
741 | cp2); | |
742 | else | |
743 | print_host(out, cp2, public, 1); | |
744 | } | |
bdffbcdc | 745 | has_unhashed = 1; |
746 | } | |
747 | } | |
748 | key_free(public); | |
749 | } | |
750 | fclose(in); | |
751 | ||
752 | if (invalid) { | |
753 | fprintf(stderr, "%s is not a valid known_host file.\n", | |
754 | identity_file); | |
755 | if (inplace) { | |
756 | fprintf(stderr, "Not replacing existing known_hosts " | |
604dac32 | 757 | "file because of errors\n"); |
bdffbcdc | 758 | fclose(out); |
759 | unlink(tmp); | |
760 | } | |
761 | exit(1); | |
762 | } | |
763 | ||
764 | if (inplace) { | |
765 | fclose(out); | |
766 | ||
767 | /* Backup existing file */ | |
768 | if (unlink(old) == -1 && errno != ENOENT) | |
769 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
770 | if (link(identity_file, old) == -1) | |
771 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
772 | strerror(errno)); | |
773 | /* Move new one into place */ | |
774 | if (rename(tmp, identity_file) == -1) { | |
775 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
776 | strerror(errno)); | |
777 | unlink(tmp); | |
778 | unlink(old); | |
779 | exit(1); | |
780 | } | |
781 | ||
782 | fprintf(stderr, "%s updated.\n", identity_file); | |
783 | fprintf(stderr, "Original contents retained as %s\n", old); | |
784 | if (has_unhashed) { | |
785 | fprintf(stderr, "WARNING: %s contains unhashed " | |
786 | "entries\n", old); | |
787 | fprintf(stderr, "Delete this file to ensure privacy " | |
4e2e5cfd | 788 | "of hostnames\n"); |
bdffbcdc | 789 | } |
790 | } | |
791 | ||
792 | exit(0); | |
793 | } | |
794 | ||
5260325f | 795 | /* |
796 | * Perform changing a passphrase. The argument is the passwd structure | |
797 | * for the current user. | |
798 | */ | |
396c147e | 799 | static void |
f095fcc7 | 800 | do_change_passphrase(struct passwd *pw) |
801 | { | |
5260325f | 802 | char *comment; |
803 | char *old_passphrase, *passphrase1, *passphrase2; | |
804 | struct stat st; | |
a306f2dd | 805 | Key *private; |
5260325f | 806 | |
807 | if (!have_identity) | |
808 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 809 | if (stat(identity_file, &st) < 0) { |
810 | perror(identity_file); | |
811 | exit(1); | |
812 | } | |
5260325f | 813 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 814 | private = key_load_private(identity_file, "", &comment); |
815 | if (private == NULL) { | |
5260325f | 816 | if (identity_passphrase) |
817 | old_passphrase = xstrdup(identity_passphrase); | |
818 | else | |
1843a425 | 819 | old_passphrase = |
820 | read_passphrase("Enter old passphrase: ", | |
821 | RP_ALLOW_STDIN); | |
822 | private = key_load_private(identity_file, old_passphrase, | |
823 | &comment); | |
aeaa3d9e | 824 | memset(old_passphrase, 0, strlen(old_passphrase)); |
825 | xfree(old_passphrase); | |
826 | if (private == NULL) { | |
5260325f | 827 | printf("Bad passphrase.\n"); |
828 | exit(1); | |
829 | } | |
5260325f | 830 | } |
831 | printf("Key has comment '%s'\n", comment); | |
832 | ||
833 | /* Ask the new passphrase (twice). */ | |
834 | if (identity_new_passphrase) { | |
835 | passphrase1 = xstrdup(identity_new_passphrase); | |
836 | passphrase2 = NULL; | |
837 | } else { | |
838 | passphrase1 = | |
1843a425 | 839 | read_passphrase("Enter new passphrase (empty for no " |
840 | "passphrase): ", RP_ALLOW_STDIN); | |
841 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
184eed6a | 842 | RP_ALLOW_STDIN); |
5260325f | 843 | |
844 | /* Verify that they are the same. */ | |
845 | if (strcmp(passphrase1, passphrase2) != 0) { | |
846 | memset(passphrase1, 0, strlen(passphrase1)); | |
847 | memset(passphrase2, 0, strlen(passphrase2)); | |
848 | xfree(passphrase1); | |
849 | xfree(passphrase2); | |
850 | printf("Pass phrases do not match. Try again.\n"); | |
851 | exit(1); | |
852 | } | |
853 | /* Destroy the other copy. */ | |
854 | memset(passphrase2, 0, strlen(passphrase2)); | |
855 | xfree(passphrase2); | |
8efc0c15 | 856 | } |
8efc0c15 | 857 | |
5260325f | 858 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 859 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 860 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 861 | memset(passphrase1, 0, strlen(passphrase1)); |
862 | xfree(passphrase1); | |
a306f2dd | 863 | key_free(private); |
5260325f | 864 | xfree(comment); |
865 | exit(1); | |
866 | } | |
867 | /* Destroy the passphrase and the copy of the key in memory. */ | |
868 | memset(passphrase1, 0, strlen(passphrase1)); | |
869 | xfree(passphrase1); | |
a306f2dd | 870 | key_free(private); /* Destroys contents */ |
5260325f | 871 | xfree(comment); |
872 | ||
873 | printf("Your identification has been saved with the new passphrase.\n"); | |
874 | exit(0); | |
875 | } | |
8efc0c15 | 876 | |
21289cd0 | 877 | /* |
878 | * Print the SSHFP RR. | |
879 | */ | |
3eff92ec | 880 | static int |
881 | do_print_resource_record(struct passwd *pw, char *fname, char *hname) | |
21289cd0 | 882 | { |
883 | Key *public; | |
884 | char *comment = NULL; | |
885 | struct stat st; | |
886 | ||
3eff92ec | 887 | if (fname == NULL) |
21289cd0 | 888 | ask_filename(pw, "Enter file in which the key is"); |
3eff92ec | 889 | if (stat(fname, &st) < 0) { |
890 | if (errno == ENOENT) | |
891 | return 0; | |
892 | perror(fname); | |
21289cd0 | 893 | exit(1); |
894 | } | |
3eff92ec | 895 | public = key_load_public(fname, &comment); |
21289cd0 | 896 | if (public != NULL) { |
ca75d7de | 897 | export_dns_rr(hname, public, stdout, print_generic); |
21289cd0 | 898 | key_free(public); |
899 | xfree(comment); | |
3eff92ec | 900 | return 1; |
21289cd0 | 901 | } |
902 | if (comment) | |
903 | xfree(comment); | |
904 | ||
3eff92ec | 905 | printf("failed to read v2 public key from %s.\n", fname); |
21289cd0 | 906 | exit(1); |
907 | } | |
21289cd0 | 908 | |
5260325f | 909 | /* |
910 | * Change the comment of a private key file. | |
911 | */ | |
396c147e | 912 | static void |
8efc0c15 | 913 | do_change_comment(struct passwd *pw) |
914 | { | |
1c9a907f | 915 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 916 | Key *private; |
917 | Key *public; | |
5260325f | 918 | struct stat st; |
919 | FILE *f; | |
1c9a907f | 920 | int fd; |
5260325f | 921 | |
922 | if (!have_identity) | |
923 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 924 | if (stat(identity_file, &st) < 0) { |
925 | perror(identity_file); | |
926 | exit(1); | |
927 | } | |
aeaa3d9e | 928 | private = key_load_private(identity_file, "", &comment); |
929 | if (private == NULL) { | |
5260325f | 930 | if (identity_passphrase) |
931 | passphrase = xstrdup(identity_passphrase); | |
932 | else if (identity_new_passphrase) | |
933 | passphrase = xstrdup(identity_new_passphrase); | |
934 | else | |
1843a425 | 935 | passphrase = read_passphrase("Enter passphrase: ", |
936 | RP_ALLOW_STDIN); | |
5260325f | 937 | /* Try to load using the passphrase. */ |
aeaa3d9e | 938 | private = key_load_private(identity_file, passphrase, &comment); |
939 | if (private == NULL) { | |
5260325f | 940 | memset(passphrase, 0, strlen(passphrase)); |
941 | xfree(passphrase); | |
942 | printf("Bad passphrase.\n"); | |
943 | exit(1); | |
944 | } | |
aeaa3d9e | 945 | } else { |
946 | passphrase = xstrdup(""); | |
5260325f | 947 | } |
aeaa3d9e | 948 | if (private->type != KEY_RSA1) { |
949 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
950 | key_free(private); | |
951 | exit(1); | |
184eed6a | 952 | } |
5260325f | 953 | printf("Key now has comment '%s'\n", comment); |
954 | ||
955 | if (identity_comment) { | |
956 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
957 | } else { | |
958 | printf("Enter new comment: "); | |
959 | fflush(stdout); | |
960 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
961 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 962 | key_free(private); |
5260325f | 963 | exit(1); |
964 | } | |
5260325f | 965 | if (strchr(new_comment, '\n')) |
966 | *strchr(new_comment, '\n') = 0; | |
967 | } | |
968 | ||
969 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 970 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
58cfa257 | 971 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 972 | memset(passphrase, 0, strlen(passphrase)); |
973 | xfree(passphrase); | |
a306f2dd | 974 | key_free(private); |
5260325f | 975 | xfree(comment); |
976 | exit(1); | |
8efc0c15 | 977 | } |
5260325f | 978 | memset(passphrase, 0, strlen(passphrase)); |
979 | xfree(passphrase); | |
aeaa3d9e | 980 | public = key_from_private(private); |
a306f2dd | 981 | key_free(private); |
5260325f | 982 | |
5260325f | 983 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 984 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
985 | if (fd == -1) { | |
5260325f | 986 | printf("Could not save your public key in %s\n", identity_file); |
987 | exit(1); | |
988 | } | |
1c9a907f | 989 | f = fdopen(fd, "w"); |
990 | if (f == NULL) { | |
991 | printf("fdopen %s failed", identity_file); | |
992 | exit(1); | |
993 | } | |
a306f2dd | 994 | if (!key_write(public, f)) |
995 | fprintf(stderr, "write key failed"); | |
996 | key_free(public); | |
997 | fprintf(f, " %s\n", new_comment); | |
5260325f | 998 | fclose(f); |
999 | ||
1000 | xfree(comment); | |
1001 | ||
1002 | printf("The comment in your key file has been changed.\n"); | |
1003 | exit(0); | |
8efc0c15 | 1004 | } |
1005 | ||
396c147e | 1006 | static void |
5ad13cd7 | 1007 | usage(void) |
1008 | { | |
58153e34 | 1009 | fprintf(stderr, "Usage: %s [options]\n", __progname); |
1010 | fprintf(stderr, "Options:\n"); | |
4feb61af | 1011 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
1012 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
58153e34 | 1013 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
4feb61af | 1014 | fprintf(stderr, " -C comment Provide new comment.\n"); |
58153e34 | 1015 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
4feb61af | 1016 | #ifdef SMARTCARD |
1017 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
1018 | #endif /* SMARTCARD */ | |
e91a8c3f | 1019 | fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n"); |
4feb61af | 1020 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
58153e34 | 1021 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
4feb61af | 1022 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
21289cd0 | 1023 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
4feb61af | 1024 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
e91a8c3f | 1025 | fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n"); |
58153e34 | 1026 | fprintf(stderr, " -l Show fingerprint of key file.\n"); |
4feb61af | 1027 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
58153e34 | 1028 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
1029 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
4feb61af | 1030 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
1031 | fprintf(stderr, " -q Quiet.\n"); | |
1032 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
21289cd0 | 1033 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
4feb61af | 1034 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
1035 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
1036 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
58153e34 | 1037 | #ifdef SMARTCARD |
58153e34 | 1038 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
1039 | #endif /* SMARTCARD */ | |
4feb61af | 1040 | fprintf(stderr, " -v Verbose.\n"); |
1041 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
1042 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
c35a6dc5 | 1043 | |
5260325f | 1044 | exit(1); |
5ad13cd7 | 1045 | } |
1046 | ||
5260325f | 1047 | /* |
1048 | * Main program for key management. | |
1049 | */ | |
8efc0c15 | 1050 | int |
4b4810d4 | 1051 | main(int argc, char **argv) |
8efc0c15 | 1052 | { |
3dc93cd8 | 1053 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
8f52069e | 1054 | char out_file[MAXPATHLEN], *reader_id = NULL; |
bdffbcdc | 1055 | char *rr_hostname = NULL; |
1c9a907f | 1056 | Key *private, *public; |
5260325f | 1057 | struct passwd *pw; |
5260325f | 1058 | struct stat st; |
c784ae09 | 1059 | int opt, type, fd, download = 0; |
2a1995a3 | 1060 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; |
c35a6dc5 | 1061 | int do_gen_candidates = 0, do_screen_candidates = 0; |
c6fbc95a | 1062 | int log_level = SYSLOG_LEVEL_INFO; |
c35a6dc5 | 1063 | BIGNUM *start = NULL; |
5260325f | 1064 | FILE *f; |
de4feb6b | 1065 | const char *errstr; |
fa08c86b | 1066 | |
5260325f | 1067 | extern int optind; |
1068 | extern char *optarg; | |
1069 | ||
fd6168c1 | 1070 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1071 | sanitise_stdfd(); | |
1072 | ||
b05ff3f5 | 1073 | __progname = ssh_get_progname(argv[0]); |
264dce47 | 1074 | |
fa649821 | 1075 | SSLeay_add_all_algorithms(); |
4b4810d4 | 1076 | log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
c35a6dc5 | 1077 | |
ce88d9df | 1078 | init_rng(); |
1079 | seed_rng(); | |
a306f2dd | 1080 | |
aa3378df | 1081 | /* we need this for the home * directory. */ |
5260325f | 1082 | pw = getpwuid(getuid()); |
1083 | if (!pw) { | |
1084 | printf("You don't exist, go away!\n"); | |
1085 | exit(1); | |
1086 | } | |
a306f2dd | 1087 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
1088 | perror("gethostname"); | |
1089 | exit(1); | |
1090 | } | |
aa3378df | 1091 | |
4b4810d4 | 1092 | while ((opt = getopt(argc, argv, |
bdffbcdc | 1093 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
5260325f | 1094 | switch (opt) { |
1095 | case 'b': | |
0fe9892f | 1096 | bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr); |
de4feb6b | 1097 | if (errstr) |
1098 | fatal("Bits has bad value %s (%s)", | |
1099 | optarg, errstr); | |
5260325f | 1100 | break; |
bdffbcdc | 1101 | case 'F': |
1102 | find_host = 1; | |
1103 | rr_hostname = optarg; | |
1104 | break; | |
1105 | case 'H': | |
1106 | hash_hosts = 1; | |
1107 | break; | |
1108 | case 'R': | |
1109 | delete_host = 1; | |
1110 | rr_hostname = optarg; | |
1111 | break; | |
5260325f | 1112 | case 'l': |
1113 | print_fingerprint = 1; | |
1114 | break; | |
aaf45d87 | 1115 | case 'B': |
1116 | print_bubblebabble = 1; | |
1117 | break; | |
5260325f | 1118 | case 'p': |
1119 | change_passphrase = 1; | |
1120 | break; | |
5260325f | 1121 | case 'c': |
1122 | change_comment = 1; | |
1123 | break; | |
5260325f | 1124 | case 'f': |
c784ae09 | 1125 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1126 | sizeof(identity_file)) | |
1127 | fatal("Identity filename too long"); | |
5260325f | 1128 | have_identity = 1; |
1129 | break; | |
21289cd0 | 1130 | case 'g': |
1131 | print_generic = 1; | |
1132 | break; | |
5260325f | 1133 | case 'P': |
1134 | identity_passphrase = optarg; | |
1135 | break; | |
5260325f | 1136 | case 'N': |
1137 | identity_new_passphrase = optarg; | |
1138 | break; | |
5260325f | 1139 | case 'C': |
1140 | identity_comment = optarg; | |
1141 | break; | |
5260325f | 1142 | case 'q': |
1143 | quiet = 1; | |
1144 | break; | |
5deceabb | 1145 | case 'e': |
a306f2dd | 1146 | case 'x': |
5deceabb | 1147 | /* export key */ |
a306f2dd | 1148 | convert_to_ssh2 = 1; |
1149 | break; | |
5deceabb | 1150 | case 'i': |
a306f2dd | 1151 | case 'X': |
5deceabb | 1152 | /* import key */ |
a306f2dd | 1153 | convert_from_ssh2 = 1; |
1154 | break; | |
a306f2dd | 1155 | case 'y': |
1156 | print_public = 1; | |
1157 | break; | |
a306f2dd | 1158 | case 'd': |
fa08c86b | 1159 | key_type_name = "dsa"; |
a306f2dd | 1160 | break; |
fa08c86b | 1161 | case 't': |
1162 | key_type_name = optarg; | |
fa08c86b | 1163 | break; |
93a56445 | 1164 | case 'D': |
1165 | download = 1; | |
32596c7b | 1166 | /*FALLTHROUGH*/ |
285d2b15 | 1167 | case 'U': |
93a56445 | 1168 | reader_id = optarg; |
2b30154a | 1169 | break; |
c6fbc95a | 1170 | case 'v': |
1171 | if (log_level == SYSLOG_LEVEL_INFO) | |
1172 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1173 | else { | |
f2107e97 | 1174 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
c6fbc95a | 1175 | log_level < SYSLOG_LEVEL_DEBUG3) |
1176 | log_level++; | |
1177 | } | |
1178 | break; | |
21289cd0 | 1179 | case 'r': |
bdffbcdc | 1180 | rr_hostname = optarg; |
21289cd0 | 1181 | break; |
c35a6dc5 | 1182 | case 'W': |
0fe9892f | 1183 | generator_wanted = (u_int32_t)strtonum(optarg, 1, |
1184 | UINT_MAX, &errstr); | |
c784ae09 | 1185 | if (errstr) |
1186 | fatal("Desired generator has bad value: %s (%s)", | |
1187 | optarg, errstr); | |
c35a6dc5 | 1188 | break; |
1189 | case 'a': | |
0fe9892f | 1190 | trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1191 | if (errstr) |
1192 | fatal("Invalid number of trials: %s (%s)", | |
1193 | optarg, errstr); | |
c35a6dc5 | 1194 | break; |
1195 | case 'M': | |
0fe9892f | 1196 | memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1197 | if (errstr) { |
1198 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1199 | } | |
c35a6dc5 | 1200 | break; |
1201 | case 'G': | |
1202 | do_gen_candidates = 1; | |
c784ae09 | 1203 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1204 | sizeof(out_file)) | |
1205 | fatal("Output filename too long"); | |
c35a6dc5 | 1206 | break; |
1207 | case 'T': | |
1208 | do_screen_candidates = 1; | |
c784ae09 | 1209 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1210 | sizeof(out_file)) | |
1211 | fatal("Output filename too long"); | |
c35a6dc5 | 1212 | break; |
1213 | case 'S': | |
1214 | /* XXX - also compare length against bits */ | |
1215 | if (BN_hex2bn(&start, optarg) == 0) | |
1216 | fatal("Invalid start point."); | |
1217 | break; | |
5260325f | 1218 | case '?': |
1219 | default: | |
1220 | usage(); | |
1221 | } | |
1222 | } | |
c6fbc95a | 1223 | |
1224 | /* reinit */ | |
4b4810d4 | 1225 | log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); |
c6fbc95a | 1226 | |
4b4810d4 | 1227 | if (optind < argc) { |
5260325f | 1228 | printf("Too many arguments.\n"); |
1229 | usage(); | |
1230 | } | |
1231 | if (change_passphrase && change_comment) { | |
1232 | printf("Can only have one of -p and -c.\n"); | |
1233 | usage(); | |
1234 | } | |
bdffbcdc | 1235 | if (delete_host || hash_hosts || find_host) |
1236 | do_known_hosts(pw, rr_hostname); | |
aaf45d87 | 1237 | if (print_fingerprint || print_bubblebabble) |
5260325f | 1238 | do_fingerprint(pw); |
5260325f | 1239 | if (change_passphrase) |
1240 | do_change_passphrase(pw); | |
633151a3 | 1241 | if (change_comment) |
1242 | do_change_comment(pw); | |
ce88d9df | 1243 | if (convert_to_ssh2) |
1244 | do_convert_to_ssh2(pw); | |
1245 | if (convert_from_ssh2) | |
1246 | do_convert_from_ssh2(pw); | |
a306f2dd | 1247 | if (print_public) |
1248 | do_print_public(pw); | |
bdffbcdc | 1249 | if (rr_hostname != NULL) { |
3eff92ec | 1250 | unsigned int n = 0; |
1251 | ||
1252 | if (have_identity) { | |
1253 | n = do_print_resource_record(pw, | |
1254 | identity_file, rr_hostname); | |
1255 | if (n == 0) { | |
1256 | perror(identity_file); | |
1257 | exit(1); | |
1258 | } | |
1259 | exit(0); | |
1260 | } else { | |
1261 | ||
1262 | n += do_print_resource_record(pw, | |
1263 | _PATH_HOST_RSA_KEY_FILE, rr_hostname); | |
1264 | n += do_print_resource_record(pw, | |
1265 | _PATH_HOST_DSA_KEY_FILE, rr_hostname); | |
1266 | ||
1267 | if (n == 0) | |
1268 | fatal("no keys found."); | |
1269 | exit(0); | |
1270 | } | |
21289cd0 | 1271 | } |
93a56445 | 1272 | if (reader_id != NULL) { |
4f831fd7 | 1273 | #ifdef SMARTCARD |
93a56445 | 1274 | if (download) |
1275 | do_download(pw, reader_id); | |
1276 | else | |
1277 | do_upload(pw, reader_id); | |
3e984472 | 1278 | #else /* SMARTCARD */ |
4f831fd7 | 1279 | fatal("no support for smartcards."); |
3e984472 | 1280 | #endif /* SMARTCARD */ |
93a56445 | 1281 | } |
5260325f | 1282 | |
c35a6dc5 | 1283 | if (do_gen_candidates) { |
1284 | FILE *out = fopen(out_file, "w"); | |
b6453d99 | 1285 | |
c35a6dc5 | 1286 | if (out == NULL) { |
1287 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1288 | out_file, strerror(errno)); | |
1289 | return (1); | |
1290 | } | |
255d3e00 | 1291 | if (bits == 0) |
1292 | bits = DEFAULT_BITS; | |
c35a6dc5 | 1293 | if (gen_candidates(out, memory, bits, start) != 0) |
17318dd6 | 1294 | fatal("modulus candidate generation failed"); |
c35a6dc5 | 1295 | |
1296 | return (0); | |
1297 | } | |
1298 | ||
1299 | if (do_screen_candidates) { | |
1300 | FILE *in; | |
1301 | FILE *out = fopen(out_file, "w"); | |
1302 | ||
1303 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1304 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1305 | fatal("Couldn't open modulus candidate " | |
aff51935 | 1306 | "file \"%s\": %s", identity_file, |
c35a6dc5 | 1307 | strerror(errno)); |
1308 | } | |
1309 | } else | |
1310 | in = stdin; | |
1311 | ||
1312 | if (out == NULL) { | |
1313 | fatal("Couldn't open moduli file \"%s\": %s", | |
1314 | out_file, strerror(errno)); | |
1315 | } | |
1316 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
17318dd6 | 1317 | fatal("modulus screening failed"); |
08d035b6 | 1318 | return (0); |
c35a6dc5 | 1319 | } |
1320 | ||
5260325f | 1321 | arc4random_stir(); |
1322 | ||
882c9d5a | 1323 | if (key_type_name == NULL) |
1324 | key_type_name = "rsa"; | |
1325 | ||
c523303b | 1326 | type = key_type_from_name(key_type_name); |
1327 | if (type == KEY_UNSPEC) { | |
1328 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1329 | exit(1); | |
a306f2dd | 1330 | } |
255d3e00 | 1331 | if (bits == 0) |
1332 | bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; | |
6e94bd72 | 1333 | if (type == KEY_DSA && bits != 1024) |
1334 | fatal("DSA keys must be 1024 bits"); | |
60dc0294 | 1335 | if (!quiet) |
1336 | printf("Generating public/private %s key pair.\n", key_type_name); | |
fa08c86b | 1337 | private = key_generate(type, bits); |
1338 | if (private == NULL) { | |
1339 | fprintf(stderr, "key_generate failed"); | |
1340 | exit(1); | |
1341 | } | |
1342 | public = key_from_private(private); | |
5260325f | 1343 | |
1344 | if (!have_identity) | |
1345 | ask_filename(pw, "Enter file in which to save the key"); | |
1346 | ||
7b9b0103 | 1347 | /* Create ~/.ssh directory if it doesn't already exist. */ |
42f11eb2 | 1348 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 1349 | if (strstr(identity_file, dotsshdir) != NULL && |
1350 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 1351 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 1352 | error("Could not create directory '%s'.", dotsshdir); |
1353 | else if (!quiet) | |
1354 | printf("Created directory '%s'.\n", dotsshdir); | |
1355 | } | |
1356 | /* If the file already exists, ask the user to confirm. */ | |
1357 | if (stat(identity_file, &st) >= 0) { | |
1358 | char yesno[3]; | |
1359 | printf("%s already exists.\n", identity_file); | |
1360 | printf("Overwrite (y/n)? "); | |
1361 | fflush(stdout); | |
1362 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1363 | exit(1); | |
1364 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1365 | exit(1); | |
1366 | } | |
1367 | /* Ask for a passphrase (twice). */ | |
1368 | if (identity_passphrase) | |
1369 | passphrase1 = xstrdup(identity_passphrase); | |
1370 | else if (identity_new_passphrase) | |
1371 | passphrase1 = xstrdup(identity_new_passphrase); | |
1372 | else { | |
1373 | passphrase_again: | |
1374 | passphrase1 = | |
1843a425 | 1375 | read_passphrase("Enter passphrase (empty for no " |
1376 | "passphrase): ", RP_ALLOW_STDIN); | |
1377 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1378 | RP_ALLOW_STDIN); | |
5260325f | 1379 | if (strcmp(passphrase1, passphrase2) != 0) { |
1843a425 | 1380 | /* |
1381 | * The passphrases do not match. Clear them and | |
1382 | * retry. | |
1383 | */ | |
5260325f | 1384 | memset(passphrase1, 0, strlen(passphrase1)); |
1385 | memset(passphrase2, 0, strlen(passphrase2)); | |
1386 | xfree(passphrase1); | |
1387 | xfree(passphrase2); | |
1388 | printf("Passphrases do not match. Try again.\n"); | |
1389 | goto passphrase_again; | |
1390 | } | |
1391 | /* Clear the other copy of the passphrase. */ | |
1392 | memset(passphrase2, 0, strlen(passphrase2)); | |
1393 | xfree(passphrase2); | |
1394 | } | |
1395 | ||
5260325f | 1396 | if (identity_comment) { |
1397 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1398 | } else { | |
6ae2364d | 1399 | /* Create default commend field for the passphrase. */ |
5260325f | 1400 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
1401 | } | |
1402 | ||
1403 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 1404 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 1405 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 1406 | memset(passphrase1, 0, strlen(passphrase1)); |
1407 | xfree(passphrase1); | |
1408 | exit(1); | |
1409 | } | |
1410 | /* Clear the passphrase. */ | |
1411 | memset(passphrase1, 0, strlen(passphrase1)); | |
1412 | xfree(passphrase1); | |
1413 | ||
1414 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 1415 | key_free(private); |
5260325f | 1416 | arc4random_stir(); |
1417 | ||
1418 | if (!quiet) | |
1419 | printf("Your identification has been saved in %s.\n", identity_file); | |
1420 | ||
5260325f | 1421 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1422 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1423 | if (fd == -1) { | |
5260325f | 1424 | printf("Could not save your public key in %s\n", identity_file); |
1425 | exit(1); | |
1426 | } | |
1c9a907f | 1427 | f = fdopen(fd, "w"); |
1428 | if (f == NULL) { | |
1429 | printf("fdopen %s failed", identity_file); | |
1430 | exit(1); | |
1431 | } | |
a306f2dd | 1432 | if (!key_write(public, f)) |
1433 | fprintf(stderr, "write key failed"); | |
1434 | fprintf(f, " %s\n", comment); | |
5260325f | 1435 | fclose(f); |
1436 | ||
1437 | if (!quiet) { | |
22138a36 | 1438 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 1439 | printf("Your public key has been saved in %s.\n", |
1440 | identity_file); | |
5260325f | 1441 | printf("The key fingerprint is:\n"); |
22138a36 | 1442 | printf("%s %s\n", fp, comment); |
1443 | xfree(fp); | |
8efc0c15 | 1444 | } |
a306f2dd | 1445 | |
1446 | key_free(public); | |
5260325f | 1447 | exit(0); |
8efc0c15 | 1448 | } |