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5188ba17 | 1 | /* $OpenBSD: ssh-keygen.c,v 1.149 2006/07/17 01:31:10 stevesk 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> |
8efc0c15 | 20 | |
a306f2dd | 21 | #include <openssl/evp.h> |
22 | #include <openssl/pem.h> | |
a306f2dd | 23 | |
028094f4 | 24 | #include <errno.h> |
d3221cca | 25 | #include <fcntl.h> |
c8dfff33 | 26 | #if defined(HAVE_NETDB_H) |
27 | # include <netdb.h> | |
28 | #endif | |
42685763 | 29 | #ifdef HAVE_PATHS_H |
30 | # include <paths.h> | |
31 | #endif | |
b1842393 | 32 | #include <pwd.h> |
5188ba17 | 33 | #include <unistd.h> |
b1842393 | 34 | |
8efc0c15 | 35 | #include "xmalloc.h" |
a306f2dd | 36 | #include "key.h" |
457fc0c6 | 37 | #include "rsa.h" |
a306f2dd | 38 | #include "authfile.h" |
39 | #include "uuencode.h" | |
94ec8c6b | 40 | #include "buffer.h" |
41 | #include "bufaux.h" | |
42f11eb2 | 42 | #include "pathnames.h" |
43 | #include "log.h" | |
58ae9cb8 | 44 | #include "misc.h" |
bdffbcdc | 45 | #include "match.h" |
46 | #include "hostfile.h" | |
0cbe25f0 | 47 | #include "dns.h" |
94ec8c6b | 48 | |
93a56445 | 49 | #ifdef SMARTCARD |
93a56445 | 50 | #include "scard.h" |
dd2495cb | 51 | #endif |
2b30154a | 52 | |
255d3e00 | 53 | /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ |
54 | #define DEFAULT_BITS 2048 | |
55 | #define DEFAULT_BITS_DSA 1024 | |
56 | u_int32_t bits = 0; | |
8efc0c15 | 57 | |
aa3378df | 58 | /* |
59 | * Flag indicating that we just want to change the passphrase. This can be | |
60 | * set on the command line. | |
61 | */ | |
8efc0c15 | 62 | int change_passphrase = 0; |
63 | ||
aa3378df | 64 | /* |
65 | * Flag indicating that we just want to change the comment. This can be set | |
66 | * on the command line. | |
67 | */ | |
8efc0c15 | 68 | int change_comment = 0; |
69 | ||
70 | int quiet = 0; | |
71 | ||
bdffbcdc | 72 | /* Flag indicating that we want to hash a known_hosts file */ |
73 | int hash_hosts = 0; | |
74 | /* Flag indicating that we want lookup a host in known_hosts file */ | |
75 | int find_host = 0; | |
76 | /* Flag indicating that we want to delete a host from a known_hosts file */ | |
77 | int delete_host = 0; | |
78 | ||
f095fcc7 | 79 | /* Flag indicating that we just want to see the key fingerprint */ |
80 | int print_fingerprint = 0; | |
aaf45d87 | 81 | int print_bubblebabble = 0; |
f095fcc7 | 82 | |
5ad13cd7 | 83 | /* The identity file name, given on the command line or entered by the user. */ |
84 | char identity_file[1024]; | |
85 | int have_identity = 0; | |
8efc0c15 | 86 | |
87 | /* This is set to the passphrase if given on the command line. */ | |
88 | char *identity_passphrase = NULL; | |
89 | ||
90 | /* This is set to the new passphrase if given on the command line. */ | |
91 | char *identity_new_passphrase = NULL; | |
92 | ||
93 | /* This is set to the new comment if given on the command line. */ | |
94 | char *identity_comment = NULL; | |
95 | ||
a306f2dd | 96 | /* Dump public key file in format used by real and the original SSH 2 */ |
97 | int convert_to_ssh2 = 0; | |
98 | int convert_from_ssh2 = 0; | |
99 | int print_public = 0; | |
21289cd0 | 100 | int print_generic = 0; |
fa08c86b | 101 | |
3dc93cd8 | 102 | char *key_type_name = NULL; |
a306f2dd | 103 | |
5ad13cd7 | 104 | /* argv0 */ |
105 | extern char *__progname; | |
8efc0c15 | 106 | |
a306f2dd | 107 | char hostname[MAXHOSTNAMELEN]; |
108 | ||
20eea1d7 | 109 | /* moduli.c */ |
c784ae09 | 110 | int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
20eea1d7 | 111 | int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
112 | ||
396c147e | 113 | static void |
5ad13cd7 | 114 | ask_filename(struct passwd *pw, const char *prompt) |
8efc0c15 | 115 | { |
5260325f | 116 | char buf[1024]; |
c523303b | 117 | char *name = NULL; |
118 | ||
8d22d775 | 119 | if (key_type_name == NULL) |
42f11eb2 | 120 | name = _PATH_SSH_CLIENT_ID_RSA; |
32596c7b | 121 | else { |
8d22d775 | 122 | switch (key_type_from_name(key_type_name)) { |
123 | case KEY_RSA1: | |
124 | name = _PATH_SSH_CLIENT_IDENTITY; | |
125 | break; | |
126 | case KEY_DSA: | |
127 | name = _PATH_SSH_CLIENT_ID_DSA; | |
128 | break; | |
129 | case KEY_RSA: | |
130 | name = _PATH_SSH_CLIENT_ID_RSA; | |
131 | break; | |
132 | default: | |
133 | fprintf(stderr, "bad key type"); | |
134 | exit(1); | |
135 | break; | |
136 | } | |
32596c7b | 137 | } |
c523303b | 138 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
8d88011e | 139 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
5260325f | 140 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
141 | exit(1); | |
142 | if (strchr(buf, '\n')) | |
143 | *strchr(buf, '\n') = 0; | |
144 | if (strcmp(buf, "") != 0) | |
145 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
146 | have_identity = 1; | |
f095fcc7 | 147 | } |
8efc0c15 | 148 | |
396c147e | 149 | static Key * |
abe0fb9f | 150 | load_identity(char *filename) |
a306f2dd | 151 | { |
aeaa3d9e | 152 | char *pass; |
153 | Key *prv; | |
154 | ||
cd332296 | 155 | prv = key_load_private(filename, "", NULL); |
aeaa3d9e | 156 | if (prv == NULL) { |
abe0fb9f | 157 | if (identity_passphrase) |
158 | pass = xstrdup(identity_passphrase); | |
159 | else | |
1843a425 | 160 | pass = read_passphrase("Enter passphrase: ", |
161 | RP_ALLOW_STDIN); | |
aeaa3d9e | 162 | prv = key_load_private(filename, pass, NULL); |
a306f2dd | 163 | memset(pass, 0, strlen(pass)); |
164 | xfree(pass); | |
165 | } | |
aeaa3d9e | 166 | return prv; |
a306f2dd | 167 | } |
168 | ||
94ec8c6b | 169 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
7203d6bb | 170 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
94ec8c6b | 171 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
2b87da3b | 172 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 173 | |
396c147e | 174 | static void |
a306f2dd | 175 | do_convert_to_ssh2(struct passwd *pw) |
176 | { | |
b587c165 | 177 | Key *k; |
21b30f38 | 178 | u_int len; |
1e3b8b07 | 179 | u_char *blob; |
a306f2dd | 180 | struct stat st; |
181 | ||
182 | if (!have_identity) | |
183 | ask_filename(pw, "Enter file in which the key is"); | |
184 | if (stat(identity_file, &st) < 0) { | |
185 | perror(identity_file); | |
186 | exit(1); | |
187 | } | |
b587c165 | 188 | if ((k = key_load_public(identity_file, NULL)) == NULL) { |
abe0fb9f | 189 | if ((k = load_identity(identity_file)) == NULL) { |
b587c165 | 190 | fprintf(stderr, "load failed\n"); |
191 | exit(1); | |
192 | } | |
a306f2dd | 193 | } |
3566c73c | 194 | if (k->type == KEY_RSA1) { |
195 | fprintf(stderr, "version 1 keys are not supported\n"); | |
196 | exit(1); | |
197 | } | |
f7436b8c | 198 | if (key_to_blob(k, &blob, &len) <= 0) { |
199 | fprintf(stderr, "key_to_blob failed\n"); | |
200 | exit(1); | |
201 | } | |
94ec8c6b | 202 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 203 | fprintf(stdout, |
512df038 | 204 | "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", |
b587c165 | 205 | key_size(k), key_type(k), |
a306f2dd | 206 | pw->pw_name, hostname); |
207 | dump_base64(stdout, blob, len); | |
94ec8c6b | 208 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
b587c165 | 209 | key_free(k); |
a306f2dd | 210 | xfree(blob); |
211 | exit(0); | |
212 | } | |
213 | ||
396c147e | 214 | static void |
94ec8c6b | 215 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
216 | { | |
ca75d7de | 217 | u_int bignum_bits = buffer_get_int(b); |
218 | u_int bytes = (bignum_bits + 7) / 8; | |
457fc0c6 | 219 | |
94ec8c6b | 220 | if (buffer_len(b) < bytes) |
457fc0c6 | 221 | fatal("buffer_get_bignum_bits: input buffer too small: " |
222 | "need %d have %d", bytes, buffer_len(b)); | |
20905a8e | 223 | BN_bin2bn(buffer_ptr(b), bytes, value); |
94ec8c6b | 224 | buffer_consume(b, bytes); |
225 | } | |
226 | ||
396c147e | 227 | static Key * |
c66f9d0e | 228 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
94ec8c6b | 229 | { |
230 | Buffer b; | |
94ec8c6b | 231 | Key *key = NULL; |
a599bd06 | 232 | char *type, *cipher; |
d3260e12 | 233 | u_char *sig, data[] = "abcde12345"; |
2e0becb6 | 234 | int magic, rlen, ktype, i1, i2, i3, i4; |
a599bd06 | 235 | u_int slen; |
2e0becb6 | 236 | u_long e; |
94ec8c6b | 237 | |
238 | buffer_init(&b); | |
239 | buffer_append(&b, blob, blen); | |
240 | ||
241 | magic = buffer_get_int(&b); | |
242 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
243 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
244 | buffer_free(&b); | |
245 | return NULL; | |
246 | } | |
2e0becb6 | 247 | i1 = buffer_get_int(&b); |
94ec8c6b | 248 | type = buffer_get_string(&b, NULL); |
249 | cipher = buffer_get_string(&b, NULL); | |
2e0becb6 | 250 | i2 = buffer_get_int(&b); |
251 | i3 = buffer_get_int(&b); | |
252 | i4 = buffer_get_int(&b); | |
253 | debug("ignore (%d %d %d %d)", i1,i2,i3,i4); | |
94ec8c6b | 254 | if (strcmp(cipher, "none") != 0) { |
255 | error("unsupported cipher %s", cipher); | |
256 | xfree(cipher); | |
257 | buffer_free(&b); | |
457fc0c6 | 258 | xfree(type); |
94ec8c6b | 259 | return NULL; |
260 | } | |
261 | xfree(cipher); | |
262 | ||
457fc0c6 | 263 | if (strstr(type, "dsa")) { |
264 | ktype = KEY_DSA; | |
265 | } else if (strstr(type, "rsa")) { | |
266 | ktype = KEY_RSA; | |
267 | } else { | |
3c460ede | 268 | buffer_free(&b); |
457fc0c6 | 269 | xfree(type); |
94ec8c6b | 270 | return NULL; |
271 | } | |
457fc0c6 | 272 | key = key_new_private(ktype); |
273 | xfree(type); | |
274 | ||
275 | switch (key->type) { | |
276 | case KEY_DSA: | |
277 | buffer_get_bignum_bits(&b, key->dsa->p); | |
278 | buffer_get_bignum_bits(&b, key->dsa->g); | |
279 | buffer_get_bignum_bits(&b, key->dsa->q); | |
280 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
281 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
282 | break; | |
283 | case KEY_RSA: | |
2e0becb6 | 284 | e = buffer_get_char(&b); |
285 | debug("e %lx", e); | |
286 | if (e < 30) { | |
287 | e <<= 8; | |
288 | e += buffer_get_char(&b); | |
289 | debug("e %lx", e); | |
290 | e <<= 8; | |
291 | e += buffer_get_char(&b); | |
292 | debug("e %lx", e); | |
293 | } | |
294 | if (!BN_set_word(key->rsa->e, e)) { | |
457fc0c6 | 295 | buffer_free(&b); |
296 | key_free(key); | |
297 | return NULL; | |
298 | } | |
299 | buffer_get_bignum_bits(&b, key->rsa->d); | |
300 | buffer_get_bignum_bits(&b, key->rsa->n); | |
301 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
302 | buffer_get_bignum_bits(&b, key->rsa->q); | |
303 | buffer_get_bignum_bits(&b, key->rsa->p); | |
2b63e803 | 304 | rsa_generate_additional_parameters(key->rsa); |
457fc0c6 | 305 | break; |
306 | } | |
94ec8c6b | 307 | rlen = buffer_len(&b); |
6aacefa7 | 308 | if (rlen != 0) |
457fc0c6 | 309 | error("do_convert_private_ssh2_from_blob: " |
310 | "remaining bytes in key blob %d", rlen); | |
94ec8c6b | 311 | buffer_free(&b); |
a599bd06 | 312 | |
313 | /* try the key */ | |
314 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
315 | key_verify(key, sig, slen, data, sizeof(data)); | |
316 | xfree(sig); | |
94ec8c6b | 317 | return key; |
318 | } | |
319 | ||
15b81af3 | 320 | static int |
321 | get_line(FILE *fp, char *line, size_t len) | |
322 | { | |
323 | int c; | |
324 | size_t pos = 0; | |
325 | ||
326 | line[0] = '\0'; | |
327 | while ((c = fgetc(fp)) != EOF) { | |
328 | if (pos >= len - 1) { | |
329 | fprintf(stderr, "input line too long.\n"); | |
330 | exit(1); | |
331 | } | |
32596c7b | 332 | switch (c) { |
15b81af3 | 333 | case '\r': |
334 | c = fgetc(fp); | |
335 | if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { | |
336 | fprintf(stderr, "unget: %s\n", strerror(errno)); | |
337 | exit(1); | |
338 | } | |
339 | return pos; | |
340 | case '\n': | |
341 | return pos; | |
342 | } | |
343 | line[pos++] = c; | |
344 | line[pos] = '\0'; | |
345 | } | |
2ccf5424 | 346 | if (c == EOF) |
347 | return -1; | |
15b81af3 | 348 | return pos; |
349 | } | |
350 | ||
396c147e | 351 | static void |
a306f2dd | 352 | do_convert_from_ssh2(struct passwd *pw) |
353 | { | |
354 | Key *k; | |
355 | int blen; | |
783dbbdc | 356 | u_int len; |
15b81af3 | 357 | char line[1024]; |
cf54363d | 358 | u_char blob[8096]; |
a306f2dd | 359 | char encoded[8096]; |
360 | struct stat st; | |
94ec8c6b | 361 | int escaped = 0, private = 0, ok; |
a306f2dd | 362 | FILE *fp; |
363 | ||
364 | if (!have_identity) | |
365 | ask_filename(pw, "Enter file in which the key is"); | |
366 | if (stat(identity_file, &st) < 0) { | |
367 | perror(identity_file); | |
368 | exit(1); | |
369 | } | |
370 | fp = fopen(identity_file, "r"); | |
371 | if (fp == NULL) { | |
372 | perror(identity_file); | |
373 | exit(1); | |
374 | } | |
375 | encoded[0] = '\0'; | |
15b81af3 | 376 | while ((blen = get_line(fp, line, sizeof(line))) != -1) { |
377 | if (line[blen - 1] == '\\') | |
d0c832f3 | 378 | escaped++; |
a306f2dd | 379 | if (strncmp(line, "----", 4) == 0 || |
380 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 381 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
382 | private = 1; | |
a599bd06 | 383 | if (strstr(line, " END ") != NULL) { |
384 | break; | |
385 | } | |
012bc0e1 | 386 | /* fprintf(stderr, "ignore: %s", line); */ |
a306f2dd | 387 | continue; |
388 | } | |
d0c832f3 | 389 | if (escaped) { |
390 | escaped--; | |
012bc0e1 | 391 | /* fprintf(stderr, "escaped: %s", line); */ |
d0c832f3 | 392 | continue; |
a306f2dd | 393 | } |
a306f2dd | 394 | strlcat(encoded, line, sizeof(encoded)); |
395 | } | |
783dbbdc | 396 | len = strlen(encoded); |
397 | if (((len % 4) == 3) && | |
398 | (encoded[len-1] == '=') && | |
399 | (encoded[len-2] == '=') && | |
400 | (encoded[len-3] == '=')) | |
401 | encoded[len-3] = '\0'; | |
e6207598 | 402 | blen = uudecode(encoded, blob, sizeof(blob)); |
a306f2dd | 403 | if (blen < 0) { |
404 | fprintf(stderr, "uudecode failed.\n"); | |
405 | exit(1); | |
406 | } | |
94ec8c6b | 407 | k = private ? |
408 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 409 | key_from_blob(blob, blen); |
94ec8c6b | 410 | if (k == NULL) { |
411 | fprintf(stderr, "decode blob failed.\n"); | |
412 | exit(1); | |
413 | } | |
414 | ok = private ? | |
457fc0c6 | 415 | (k->type == KEY_DSA ? |
416 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
417 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
94ec8c6b | 418 | key_write(k, stdout); |
419 | if (!ok) { | |
420 | fprintf(stderr, "key write failed"); | |
421 | exit(1); | |
422 | } | |
a306f2dd | 423 | key_free(k); |
4ccb828d | 424 | if (!private) |
425 | fprintf(stdout, "\n"); | |
a306f2dd | 426 | fclose(fp); |
427 | exit(0); | |
428 | } | |
429 | ||
396c147e | 430 | static void |
a306f2dd | 431 | do_print_public(struct passwd *pw) |
432 | { | |
aeaa3d9e | 433 | Key *prv; |
a306f2dd | 434 | struct stat st; |
435 | ||
436 | if (!have_identity) | |
437 | ask_filename(pw, "Enter file in which the key is"); | |
438 | if (stat(identity_file, &st) < 0) { | |
439 | perror(identity_file); | |
440 | exit(1); | |
441 | } | |
abe0fb9f | 442 | prv = load_identity(identity_file); |
aeaa3d9e | 443 | if (prv == NULL) { |
a306f2dd | 444 | fprintf(stderr, "load failed\n"); |
445 | exit(1); | |
446 | } | |
aeaa3d9e | 447 | if (!key_write(prv, stdout)) |
a306f2dd | 448 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 449 | key_free(prv); |
a306f2dd | 450 | fprintf(stdout, "\n"); |
451 | exit(0); | |
452 | } | |
453 | ||
4f831fd7 | 454 | #ifdef SMARTCARD |
2b30154a | 455 | static void |
93a56445 | 456 | do_upload(struct passwd *pw, const char *sc_reader_id) |
2b30154a | 457 | { |
2b30154a | 458 | Key *prv = NULL; |
459 | struct stat st; | |
b9f62352 | 460 | int ret; |
461 | ||
2b30154a | 462 | if (!have_identity) |
463 | ask_filename(pw, "Enter file in which the key is"); | |
464 | if (stat(identity_file, &st) < 0) { | |
465 | perror(identity_file); | |
b9f62352 | 466 | exit(1); |
2b30154a | 467 | } |
468 | prv = load_identity(identity_file); | |
469 | if (prv == NULL) { | |
470 | error("load failed"); | |
b9f62352 | 471 | exit(1); |
49ccba9c | 472 | } |
b9f62352 | 473 | ret = sc_put_key(prv, sc_reader_id); |
474 | key_free(prv); | |
475 | if (ret < 0) | |
476 | exit(1); | |
bbe88b6d | 477 | logit("loading key done"); |
b9f62352 | 478 | exit(0); |
2b30154a | 479 | } |
93a56445 | 480 | |
481 | static void | |
482 | do_download(struct passwd *pw, const char *sc_reader_id) | |
483 | { | |
0659cace | 484 | Key **keys = NULL; |
485 | int i; | |
93a56445 | 486 | |
0659cace | 487 | keys = sc_get_keys(sc_reader_id, NULL); |
488 | if (keys == NULL) | |
93a56445 | 489 | fatal("cannot read public key from smartcard"); |
0659cace | 490 | for (i = 0; keys[i]; i++) { |
491 | key_write(keys[i], stdout); | |
492 | key_free(keys[i]); | |
493 | fprintf(stdout, "\n"); | |
494 | } | |
495 | xfree(keys); | |
93a56445 | 496 | exit(0); |
497 | } | |
3e984472 | 498 | #endif /* SMARTCARD */ |
2b30154a | 499 | |
396c147e | 500 | static void |
f095fcc7 | 501 | do_fingerprint(struct passwd *pw) |
502 | { | |
c8d54615 | 503 | FILE *f; |
a306f2dd | 504 | Key *public; |
aaf45d87 | 505 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
17a3011c | 506 | int i, skip = 0, num = 1, invalid = 1; |
507 | enum fp_rep rep; | |
508 | enum fp_type fptype; | |
5260325f | 509 | struct stat st; |
510 | ||
aeaa3d9e | 511 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
512 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 513 | |
5260325f | 514 | if (!have_identity) |
515 | ask_filename(pw, "Enter file in which the key is"); | |
516 | if (stat(identity_file, &st) < 0) { | |
517 | perror(identity_file); | |
518 | exit(1); | |
519 | } | |
aeaa3d9e | 520 | public = key_load_public(identity_file, &comment); |
521 | if (public != NULL) { | |
522 | fp = key_fingerprint(public, fptype, rep); | |
512df038 | 523 | printf("%u %s %s\n", key_size(public), fp, comment); |
a306f2dd | 524 | key_free(public); |
fa08c86b | 525 | xfree(comment); |
aaf45d87 | 526 | xfree(fp); |
c8d54615 | 527 | exit(0); |
528 | } | |
2b8dc5e3 | 529 | if (comment) { |
aeaa3d9e | 530 | xfree(comment); |
2b8dc5e3 | 531 | comment = NULL; |
532 | } | |
c8d54615 | 533 | |
534 | f = fopen(identity_file, "r"); | |
535 | if (f != NULL) { | |
c8d54615 | 536 | while (fgets(line, sizeof(line), f)) { |
537 | i = strlen(line) - 1; | |
538 | if (line[i] != '\n') { | |
539 | error("line %d too long: %.40s...", num, line); | |
540 | skip = 1; | |
541 | continue; | |
542 | } | |
543 | num++; | |
544 | if (skip) { | |
545 | skip = 0; | |
546 | continue; | |
547 | } | |
548 | line[i] = '\0'; | |
549 | ||
550 | /* Skip leading whitespace, empty and comment lines. */ | |
551 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
552 | ; | |
553 | if (!*cp || *cp == '\n' || *cp == '#') | |
554 | continue ; | |
555 | i = strtol(cp, &ep, 10); | |
556 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
557 | int quoted = 0; | |
558 | comment = cp; | |
512df038 | 559 | for (; *cp && (quoted || (*cp != ' ' && |
560 | *cp != '\t')); cp++) { | |
c8d54615 | 561 | if (*cp == '\\' && cp[1] == '"') |
562 | cp++; /* Skip both */ | |
563 | else if (*cp == '"') | |
564 | quoted = !quoted; | |
565 | } | |
566 | if (!*cp) | |
567 | continue; | |
568 | *cp++ = '\0'; | |
569 | } | |
570 | ep = cp; | |
efcae5b1 | 571 | public = key_new(KEY_RSA1); |
572 | if (key_read(public, &cp) != 1) { | |
573 | cp = ep; | |
574 | key_free(public); | |
575 | public = key_new(KEY_UNSPEC); | |
576 | if (key_read(public, &cp) != 1) { | |
577 | key_free(public); | |
578 | continue; | |
579 | } | |
5260325f | 580 | } |
efcae5b1 | 581 | comment = *cp ? cp : comment; |
aeaa3d9e | 582 | fp = key_fingerprint(public, fptype, rep); |
512df038 | 583 | printf("%u %s %s\n", key_size(public), fp, |
efcae5b1 | 584 | comment ? comment : "no comment"); |
aaf45d87 | 585 | xfree(fp); |
aeaa3d9e | 586 | key_free(public); |
efcae5b1 | 587 | invalid = 0; |
5260325f | 588 | } |
c8d54615 | 589 | fclose(f); |
590 | } | |
591 | if (invalid) { | |
f564d016 | 592 | printf("%s is not a public key file.\n", identity_file); |
c8d54615 | 593 | exit(1); |
5260325f | 594 | } |
5260325f | 595 | exit(0); |
f095fcc7 | 596 | } |
597 | ||
bdffbcdc | 598 | static void |
599 | print_host(FILE *f, char *name, Key *public, int hash) | |
600 | { | |
601 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
602 | fatal("hash_host failed"); | |
603 | fprintf(f, "%s ", name); | |
604 | if (!key_write(public, f)) | |
605 | fatal("key_write failed"); | |
606 | fprintf(f, "\n"); | |
607 | } | |
608 | ||
609 | static void | |
610 | do_known_hosts(struct passwd *pw, const char *name) | |
611 | { | |
612 | FILE *in, *out = stdout; | |
613 | Key *public; | |
614 | char *cp, *cp2, *kp, *kp2; | |
615 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
616 | int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; | |
617 | ||
618 | if (!have_identity) { | |
619 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
620 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
621 | sizeof(identity_file)) | |
622 | fatal("Specified known hosts path too long"); | |
623 | xfree(cp); | |
624 | have_identity = 1; | |
625 | } | |
626 | if ((in = fopen(identity_file, "r")) == NULL) | |
627 | fatal("fopen: %s", strerror(errno)); | |
628 | ||
629 | /* | |
630 | * Find hosts goes to stdout, hash and deletions happen in-place | |
631 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
632 | */ | |
633 | if (!find_host && (hash_hosts || delete_host)) { | |
634 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
635 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
636 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
637 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
638 | fatal("known_hosts path too long"); | |
639 | umask(077); | |
640 | if ((c = mkstemp(tmp)) == -1) | |
641 | fatal("mkstemp: %s", strerror(errno)); | |
642 | if ((out = fdopen(c, "w")) == NULL) { | |
643 | c = errno; | |
644 | unlink(tmp); | |
645 | fatal("fdopen: %s", strerror(c)); | |
646 | } | |
647 | inplace = 1; | |
648 | } | |
649 | ||
650 | while (fgets(line, sizeof(line), in)) { | |
651 | num++; | |
652 | i = strlen(line) - 1; | |
653 | if (line[i] != '\n') { | |
654 | error("line %d too long: %.40s...", num, line); | |
655 | skip = 1; | |
656 | invalid = 1; | |
657 | continue; | |
658 | } | |
659 | if (skip) { | |
660 | skip = 0; | |
661 | continue; | |
662 | } | |
663 | line[i] = '\0'; | |
664 | ||
665 | /* Skip leading whitespace, empty and comment lines. */ | |
666 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
667 | ; | |
668 | if (!*cp || *cp == '\n' || *cp == '#') { | |
669 | if (inplace) | |
670 | fprintf(out, "%s\n", cp); | |
671 | continue; | |
672 | } | |
673 | /* Find the end of the host name portion. */ | |
674 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
675 | ; | |
676 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
677 | error("line %d missing key: %.40s...", | |
678 | num, line); | |
679 | invalid = 1; | |
680 | continue; | |
681 | } | |
682 | *kp++ = '\0'; | |
683 | kp2 = kp; | |
684 | ||
685 | public = key_new(KEY_RSA1); | |
686 | if (key_read(public, &kp) != 1) { | |
687 | kp = kp2; | |
688 | key_free(public); | |
689 | public = key_new(KEY_UNSPEC); | |
690 | if (key_read(public, &kp) != 1) { | |
691 | error("line %d invalid key: %.40s...", | |
692 | num, line); | |
693 | key_free(public); | |
694 | invalid = 1; | |
695 | continue; | |
696 | } | |
697 | } | |
698 | ||
699 | if (*cp == HASH_DELIM) { | |
700 | if (find_host || delete_host) { | |
701 | cp2 = host_hash(name, cp, strlen(cp)); | |
702 | if (cp2 == NULL) { | |
703 | error("line %d: invalid hashed " | |
704 | "name: %.64s...", num, line); | |
705 | invalid = 1; | |
706 | continue; | |
707 | } | |
708 | c = (strcmp(cp2, cp) == 0); | |
709 | if (find_host && c) { | |
710 | printf("# Host %s found: " | |
711 | "line %d type %s\n", name, | |
712 | num, key_type(public)); | |
713 | print_host(out, cp, public, 0); | |
714 | } | |
715 | if (delete_host && !c) | |
716 | print_host(out, cp, public, 0); | |
717 | } else if (hash_hosts) | |
718 | print_host(out, cp, public, 0); | |
719 | } else { | |
720 | if (find_host || delete_host) { | |
721 | c = (match_hostname(name, cp, | |
722 | strlen(cp)) == 1); | |
723 | if (find_host && c) { | |
724 | printf("# Host %s found: " | |
725 | "line %d type %s\n", name, | |
726 | num, key_type(public)); | |
727 | print_host(out, cp, public, hash_hosts); | |
728 | } | |
729 | if (delete_host && !c) | |
730 | print_host(out, cp, public, 0); | |
731 | } else if (hash_hosts) { | |
f8cc7664 | 732 | for (cp2 = strsep(&cp, ","); |
bdffbcdc | 733 | cp2 != NULL && *cp2 != '\0'; |
bc7119ba | 734 | cp2 = strsep(&cp, ",")) { |
735 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
736 | fprintf(stderr, "Warning: " | |
737 | "ignoring host name with " | |
738 | "metacharacters: %.64s\n", | |
739 | cp2); | |
740 | else | |
741 | print_host(out, cp2, public, 1); | |
742 | } | |
bdffbcdc | 743 | has_unhashed = 1; |
744 | } | |
745 | } | |
746 | key_free(public); | |
747 | } | |
748 | fclose(in); | |
749 | ||
750 | if (invalid) { | |
751 | fprintf(stderr, "%s is not a valid known_host file.\n", | |
752 | identity_file); | |
753 | if (inplace) { | |
754 | fprintf(stderr, "Not replacing existing known_hosts " | |
604dac32 | 755 | "file because of errors\n"); |
bdffbcdc | 756 | fclose(out); |
757 | unlink(tmp); | |
758 | } | |
759 | exit(1); | |
760 | } | |
761 | ||
762 | if (inplace) { | |
763 | fclose(out); | |
764 | ||
765 | /* Backup existing file */ | |
766 | if (unlink(old) == -1 && errno != ENOENT) | |
767 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
768 | if (link(identity_file, old) == -1) | |
769 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
770 | strerror(errno)); | |
771 | /* Move new one into place */ | |
772 | if (rename(tmp, identity_file) == -1) { | |
773 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
774 | strerror(errno)); | |
775 | unlink(tmp); | |
776 | unlink(old); | |
777 | exit(1); | |
778 | } | |
779 | ||
780 | fprintf(stderr, "%s updated.\n", identity_file); | |
781 | fprintf(stderr, "Original contents retained as %s\n", old); | |
782 | if (has_unhashed) { | |
783 | fprintf(stderr, "WARNING: %s contains unhashed " | |
784 | "entries\n", old); | |
785 | fprintf(stderr, "Delete this file to ensure privacy " | |
4e2e5cfd | 786 | "of hostnames\n"); |
bdffbcdc | 787 | } |
788 | } | |
789 | ||
790 | exit(0); | |
791 | } | |
792 | ||
5260325f | 793 | /* |
794 | * Perform changing a passphrase. The argument is the passwd structure | |
795 | * for the current user. | |
796 | */ | |
396c147e | 797 | static void |
f095fcc7 | 798 | do_change_passphrase(struct passwd *pw) |
799 | { | |
5260325f | 800 | char *comment; |
801 | char *old_passphrase, *passphrase1, *passphrase2; | |
802 | struct stat st; | |
a306f2dd | 803 | Key *private; |
5260325f | 804 | |
805 | if (!have_identity) | |
806 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 807 | if (stat(identity_file, &st) < 0) { |
808 | perror(identity_file); | |
809 | exit(1); | |
810 | } | |
5260325f | 811 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 812 | private = key_load_private(identity_file, "", &comment); |
813 | if (private == NULL) { | |
5260325f | 814 | if (identity_passphrase) |
815 | old_passphrase = xstrdup(identity_passphrase); | |
816 | else | |
1843a425 | 817 | old_passphrase = |
818 | read_passphrase("Enter old passphrase: ", | |
819 | RP_ALLOW_STDIN); | |
820 | private = key_load_private(identity_file, old_passphrase, | |
821 | &comment); | |
aeaa3d9e | 822 | memset(old_passphrase, 0, strlen(old_passphrase)); |
823 | xfree(old_passphrase); | |
824 | if (private == NULL) { | |
5260325f | 825 | printf("Bad passphrase.\n"); |
826 | exit(1); | |
827 | } | |
5260325f | 828 | } |
829 | printf("Key has comment '%s'\n", comment); | |
830 | ||
831 | /* Ask the new passphrase (twice). */ | |
832 | if (identity_new_passphrase) { | |
833 | passphrase1 = xstrdup(identity_new_passphrase); | |
834 | passphrase2 = NULL; | |
835 | } else { | |
836 | passphrase1 = | |
1843a425 | 837 | read_passphrase("Enter new passphrase (empty for no " |
838 | "passphrase): ", RP_ALLOW_STDIN); | |
839 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
184eed6a | 840 | RP_ALLOW_STDIN); |
5260325f | 841 | |
842 | /* Verify that they are the same. */ | |
843 | if (strcmp(passphrase1, passphrase2) != 0) { | |
844 | memset(passphrase1, 0, strlen(passphrase1)); | |
845 | memset(passphrase2, 0, strlen(passphrase2)); | |
846 | xfree(passphrase1); | |
847 | xfree(passphrase2); | |
848 | printf("Pass phrases do not match. Try again.\n"); | |
849 | exit(1); | |
850 | } | |
851 | /* Destroy the other copy. */ | |
852 | memset(passphrase2, 0, strlen(passphrase2)); | |
853 | xfree(passphrase2); | |
8efc0c15 | 854 | } |
8efc0c15 | 855 | |
5260325f | 856 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 857 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 858 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 859 | memset(passphrase1, 0, strlen(passphrase1)); |
860 | xfree(passphrase1); | |
a306f2dd | 861 | key_free(private); |
5260325f | 862 | xfree(comment); |
863 | exit(1); | |
864 | } | |
865 | /* Destroy the passphrase and the copy of the key in memory. */ | |
866 | memset(passphrase1, 0, strlen(passphrase1)); | |
867 | xfree(passphrase1); | |
a306f2dd | 868 | key_free(private); /* Destroys contents */ |
5260325f | 869 | xfree(comment); |
870 | ||
871 | printf("Your identification has been saved with the new passphrase.\n"); | |
872 | exit(0); | |
873 | } | |
8efc0c15 | 874 | |
21289cd0 | 875 | /* |
876 | * Print the SSHFP RR. | |
877 | */ | |
3eff92ec | 878 | static int |
879 | do_print_resource_record(struct passwd *pw, char *fname, char *hname) | |
21289cd0 | 880 | { |
881 | Key *public; | |
882 | char *comment = NULL; | |
883 | struct stat st; | |
884 | ||
3eff92ec | 885 | if (fname == NULL) |
21289cd0 | 886 | ask_filename(pw, "Enter file in which the key is"); |
3eff92ec | 887 | if (stat(fname, &st) < 0) { |
888 | if (errno == ENOENT) | |
889 | return 0; | |
890 | perror(fname); | |
21289cd0 | 891 | exit(1); |
892 | } | |
3eff92ec | 893 | public = key_load_public(fname, &comment); |
21289cd0 | 894 | if (public != NULL) { |
ca75d7de | 895 | export_dns_rr(hname, public, stdout, print_generic); |
21289cd0 | 896 | key_free(public); |
897 | xfree(comment); | |
3eff92ec | 898 | return 1; |
21289cd0 | 899 | } |
900 | if (comment) | |
901 | xfree(comment); | |
902 | ||
3eff92ec | 903 | printf("failed to read v2 public key from %s.\n", fname); |
21289cd0 | 904 | exit(1); |
905 | } | |
21289cd0 | 906 | |
5260325f | 907 | /* |
908 | * Change the comment of a private key file. | |
909 | */ | |
396c147e | 910 | static void |
8efc0c15 | 911 | do_change_comment(struct passwd *pw) |
912 | { | |
1c9a907f | 913 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 914 | Key *private; |
915 | Key *public; | |
5260325f | 916 | struct stat st; |
917 | FILE *f; | |
1c9a907f | 918 | int fd; |
5260325f | 919 | |
920 | if (!have_identity) | |
921 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 922 | if (stat(identity_file, &st) < 0) { |
923 | perror(identity_file); | |
924 | exit(1); | |
925 | } | |
aeaa3d9e | 926 | private = key_load_private(identity_file, "", &comment); |
927 | if (private == NULL) { | |
5260325f | 928 | if (identity_passphrase) |
929 | passphrase = xstrdup(identity_passphrase); | |
930 | else if (identity_new_passphrase) | |
931 | passphrase = xstrdup(identity_new_passphrase); | |
932 | else | |
1843a425 | 933 | passphrase = read_passphrase("Enter passphrase: ", |
934 | RP_ALLOW_STDIN); | |
5260325f | 935 | /* Try to load using the passphrase. */ |
aeaa3d9e | 936 | private = key_load_private(identity_file, passphrase, &comment); |
937 | if (private == NULL) { | |
5260325f | 938 | memset(passphrase, 0, strlen(passphrase)); |
939 | xfree(passphrase); | |
940 | printf("Bad passphrase.\n"); | |
941 | exit(1); | |
942 | } | |
aeaa3d9e | 943 | } else { |
944 | passphrase = xstrdup(""); | |
5260325f | 945 | } |
aeaa3d9e | 946 | if (private->type != KEY_RSA1) { |
947 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
948 | key_free(private); | |
949 | exit(1); | |
184eed6a | 950 | } |
5260325f | 951 | printf("Key now has comment '%s'\n", comment); |
952 | ||
953 | if (identity_comment) { | |
954 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
955 | } else { | |
956 | printf("Enter new comment: "); | |
957 | fflush(stdout); | |
958 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
959 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 960 | key_free(private); |
5260325f | 961 | exit(1); |
962 | } | |
5260325f | 963 | if (strchr(new_comment, '\n')) |
964 | *strchr(new_comment, '\n') = 0; | |
965 | } | |
966 | ||
967 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 968 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
58cfa257 | 969 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 970 | memset(passphrase, 0, strlen(passphrase)); |
971 | xfree(passphrase); | |
a306f2dd | 972 | key_free(private); |
5260325f | 973 | xfree(comment); |
974 | exit(1); | |
8efc0c15 | 975 | } |
5260325f | 976 | memset(passphrase, 0, strlen(passphrase)); |
977 | xfree(passphrase); | |
aeaa3d9e | 978 | public = key_from_private(private); |
a306f2dd | 979 | key_free(private); |
5260325f | 980 | |
5260325f | 981 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 982 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
983 | if (fd == -1) { | |
5260325f | 984 | printf("Could not save your public key in %s\n", identity_file); |
985 | exit(1); | |
986 | } | |
1c9a907f | 987 | f = fdopen(fd, "w"); |
988 | if (f == NULL) { | |
989 | printf("fdopen %s failed", identity_file); | |
990 | exit(1); | |
991 | } | |
a306f2dd | 992 | if (!key_write(public, f)) |
993 | fprintf(stderr, "write key failed"); | |
994 | key_free(public); | |
995 | fprintf(f, " %s\n", new_comment); | |
5260325f | 996 | fclose(f); |
997 | ||
998 | xfree(comment); | |
999 | ||
1000 | printf("The comment in your key file has been changed.\n"); | |
1001 | exit(0); | |
8efc0c15 | 1002 | } |
1003 | ||
396c147e | 1004 | static void |
5ad13cd7 | 1005 | usage(void) |
1006 | { | |
58153e34 | 1007 | fprintf(stderr, "Usage: %s [options]\n", __progname); |
1008 | fprintf(stderr, "Options:\n"); | |
4feb61af | 1009 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
1010 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
58153e34 | 1011 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
4feb61af | 1012 | fprintf(stderr, " -C comment Provide new comment.\n"); |
58153e34 | 1013 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
4feb61af | 1014 | #ifdef SMARTCARD |
1015 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
1016 | #endif /* SMARTCARD */ | |
58153e34 | 1017 | fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n"); |
4feb61af | 1018 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
58153e34 | 1019 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
4feb61af | 1020 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
21289cd0 | 1021 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
4feb61af | 1022 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
58153e34 | 1023 | fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n"); |
1024 | fprintf(stderr, " -l Show fingerprint of key file.\n"); | |
4feb61af | 1025 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
58153e34 | 1026 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
1027 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
4feb61af | 1028 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
1029 | fprintf(stderr, " -q Quiet.\n"); | |
1030 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
21289cd0 | 1031 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
4feb61af | 1032 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
1033 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
1034 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
58153e34 | 1035 | #ifdef SMARTCARD |
58153e34 | 1036 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
1037 | #endif /* SMARTCARD */ | |
4feb61af | 1038 | fprintf(stderr, " -v Verbose.\n"); |
1039 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
1040 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
c35a6dc5 | 1041 | |
5260325f | 1042 | exit(1); |
5ad13cd7 | 1043 | } |
1044 | ||
5260325f | 1045 | /* |
1046 | * Main program for key management. | |
1047 | */ | |
8efc0c15 | 1048 | int |
1049 | main(int ac, char **av) | |
1050 | { | |
3dc93cd8 | 1051 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
8f52069e | 1052 | char out_file[MAXPATHLEN], *reader_id = NULL; |
bdffbcdc | 1053 | char *rr_hostname = NULL; |
1c9a907f | 1054 | Key *private, *public; |
5260325f | 1055 | struct passwd *pw; |
5260325f | 1056 | struct stat st; |
c784ae09 | 1057 | int opt, type, fd, download = 0; |
2a1995a3 | 1058 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; |
c35a6dc5 | 1059 | int do_gen_candidates = 0, do_screen_candidates = 0; |
c6fbc95a | 1060 | int log_level = SYSLOG_LEVEL_INFO; |
c35a6dc5 | 1061 | BIGNUM *start = NULL; |
5260325f | 1062 | FILE *f; |
de4feb6b | 1063 | const char *errstr; |
fa08c86b | 1064 | |
5260325f | 1065 | extern int optind; |
1066 | extern char *optarg; | |
1067 | ||
fd6168c1 | 1068 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1069 | sanitise_stdfd(); | |
1070 | ||
fda04d7d | 1071 | __progname = ssh_get_progname(av[0]); |
264dce47 | 1072 | |
fa649821 | 1073 | SSLeay_add_all_algorithms(); |
c35a6dc5 | 1074 | log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
1075 | ||
ce88d9df | 1076 | init_rng(); |
1077 | seed_rng(); | |
a306f2dd | 1078 | |
aa3378df | 1079 | /* we need this for the home * directory. */ |
5260325f | 1080 | pw = getpwuid(getuid()); |
1081 | if (!pw) { | |
1082 | printf("You don't exist, go away!\n"); | |
1083 | exit(1); | |
1084 | } | |
a306f2dd | 1085 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
1086 | perror("gethostname"); | |
1087 | exit(1); | |
1088 | } | |
aa3378df | 1089 | |
c35a6dc5 | 1090 | while ((opt = getopt(ac, av, |
bdffbcdc | 1091 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
5260325f | 1092 | switch (opt) { |
1093 | case 'b': | |
0fe9892f | 1094 | bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr); |
de4feb6b | 1095 | if (errstr) |
1096 | fatal("Bits has bad value %s (%s)", | |
1097 | optarg, errstr); | |
5260325f | 1098 | break; |
bdffbcdc | 1099 | case 'F': |
1100 | find_host = 1; | |
1101 | rr_hostname = optarg; | |
1102 | break; | |
1103 | case 'H': | |
1104 | hash_hosts = 1; | |
1105 | break; | |
1106 | case 'R': | |
1107 | delete_host = 1; | |
1108 | rr_hostname = optarg; | |
1109 | break; | |
5260325f | 1110 | case 'l': |
1111 | print_fingerprint = 1; | |
1112 | break; | |
aaf45d87 | 1113 | case 'B': |
1114 | print_bubblebabble = 1; | |
1115 | break; | |
5260325f | 1116 | case 'p': |
1117 | change_passphrase = 1; | |
1118 | break; | |
5260325f | 1119 | case 'c': |
1120 | change_comment = 1; | |
1121 | break; | |
5260325f | 1122 | case 'f': |
c784ae09 | 1123 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1124 | sizeof(identity_file)) | |
1125 | fatal("Identity filename too long"); | |
5260325f | 1126 | have_identity = 1; |
1127 | break; | |
21289cd0 | 1128 | case 'g': |
1129 | print_generic = 1; | |
1130 | break; | |
5260325f | 1131 | case 'P': |
1132 | identity_passphrase = optarg; | |
1133 | break; | |
5260325f | 1134 | case 'N': |
1135 | identity_new_passphrase = optarg; | |
1136 | break; | |
5260325f | 1137 | case 'C': |
1138 | identity_comment = optarg; | |
1139 | break; | |
5260325f | 1140 | case 'q': |
1141 | quiet = 1; | |
1142 | break; | |
5deceabb | 1143 | case 'e': |
a306f2dd | 1144 | case 'x': |
5deceabb | 1145 | /* export key */ |
a306f2dd | 1146 | convert_to_ssh2 = 1; |
1147 | break; | |
5deceabb | 1148 | case 'i': |
a306f2dd | 1149 | case 'X': |
5deceabb | 1150 | /* import key */ |
a306f2dd | 1151 | convert_from_ssh2 = 1; |
1152 | break; | |
a306f2dd | 1153 | case 'y': |
1154 | print_public = 1; | |
1155 | break; | |
a306f2dd | 1156 | case 'd': |
fa08c86b | 1157 | key_type_name = "dsa"; |
a306f2dd | 1158 | break; |
fa08c86b | 1159 | case 't': |
1160 | key_type_name = optarg; | |
fa08c86b | 1161 | break; |
93a56445 | 1162 | case 'D': |
1163 | download = 1; | |
32596c7b | 1164 | /*FALLTHROUGH*/ |
285d2b15 | 1165 | case 'U': |
93a56445 | 1166 | reader_id = optarg; |
2b30154a | 1167 | break; |
c6fbc95a | 1168 | case 'v': |
1169 | if (log_level == SYSLOG_LEVEL_INFO) | |
1170 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1171 | else { | |
f2107e97 | 1172 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
c6fbc95a | 1173 | log_level < SYSLOG_LEVEL_DEBUG3) |
1174 | log_level++; | |
1175 | } | |
1176 | break; | |
21289cd0 | 1177 | case 'r': |
bdffbcdc | 1178 | rr_hostname = optarg; |
21289cd0 | 1179 | break; |
c35a6dc5 | 1180 | case 'W': |
0fe9892f | 1181 | generator_wanted = (u_int32_t)strtonum(optarg, 1, |
1182 | UINT_MAX, &errstr); | |
c784ae09 | 1183 | if (errstr) |
1184 | fatal("Desired generator has bad value: %s (%s)", | |
1185 | optarg, errstr); | |
c35a6dc5 | 1186 | break; |
1187 | case 'a': | |
0fe9892f | 1188 | trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1189 | if (errstr) |
1190 | fatal("Invalid number of trials: %s (%s)", | |
1191 | optarg, errstr); | |
c35a6dc5 | 1192 | break; |
1193 | case 'M': | |
0fe9892f | 1194 | memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1195 | if (errstr) { |
1196 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1197 | } | |
c35a6dc5 | 1198 | break; |
1199 | case 'G': | |
1200 | do_gen_candidates = 1; | |
c784ae09 | 1201 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1202 | sizeof(out_file)) | |
1203 | fatal("Output filename too long"); | |
c35a6dc5 | 1204 | break; |
1205 | case 'T': | |
1206 | do_screen_candidates = 1; | |
c784ae09 | 1207 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1208 | sizeof(out_file)) | |
1209 | fatal("Output filename too long"); | |
c35a6dc5 | 1210 | break; |
1211 | case 'S': | |
1212 | /* XXX - also compare length against bits */ | |
1213 | if (BN_hex2bn(&start, optarg) == 0) | |
1214 | fatal("Invalid start point."); | |
1215 | break; | |
5260325f | 1216 | case '?': |
1217 | default: | |
1218 | usage(); | |
1219 | } | |
1220 | } | |
c6fbc95a | 1221 | |
1222 | /* reinit */ | |
1223 | log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1); | |
1224 | ||
5260325f | 1225 | if (optind < ac) { |
1226 | printf("Too many arguments.\n"); | |
1227 | usage(); | |
1228 | } | |
1229 | if (change_passphrase && change_comment) { | |
1230 | printf("Can only have one of -p and -c.\n"); | |
1231 | usage(); | |
1232 | } | |
bdffbcdc | 1233 | if (delete_host || hash_hosts || find_host) |
1234 | do_known_hosts(pw, rr_hostname); | |
aaf45d87 | 1235 | if (print_fingerprint || print_bubblebabble) |
5260325f | 1236 | do_fingerprint(pw); |
5260325f | 1237 | if (change_passphrase) |
1238 | do_change_passphrase(pw); | |
633151a3 | 1239 | if (change_comment) |
1240 | do_change_comment(pw); | |
ce88d9df | 1241 | if (convert_to_ssh2) |
1242 | do_convert_to_ssh2(pw); | |
1243 | if (convert_from_ssh2) | |
1244 | do_convert_from_ssh2(pw); | |
a306f2dd | 1245 | if (print_public) |
1246 | do_print_public(pw); | |
bdffbcdc | 1247 | if (rr_hostname != NULL) { |
3eff92ec | 1248 | unsigned int n = 0; |
1249 | ||
1250 | if (have_identity) { | |
1251 | n = do_print_resource_record(pw, | |
1252 | identity_file, rr_hostname); | |
1253 | if (n == 0) { | |
1254 | perror(identity_file); | |
1255 | exit(1); | |
1256 | } | |
1257 | exit(0); | |
1258 | } else { | |
1259 | ||
1260 | n += do_print_resource_record(pw, | |
1261 | _PATH_HOST_RSA_KEY_FILE, rr_hostname); | |
1262 | n += do_print_resource_record(pw, | |
1263 | _PATH_HOST_DSA_KEY_FILE, rr_hostname); | |
1264 | ||
1265 | if (n == 0) | |
1266 | fatal("no keys found."); | |
1267 | exit(0); | |
1268 | } | |
21289cd0 | 1269 | } |
93a56445 | 1270 | if (reader_id != NULL) { |
4f831fd7 | 1271 | #ifdef SMARTCARD |
93a56445 | 1272 | if (download) |
1273 | do_download(pw, reader_id); | |
1274 | else | |
1275 | do_upload(pw, reader_id); | |
3e984472 | 1276 | #else /* SMARTCARD */ |
4f831fd7 | 1277 | fatal("no support for smartcards."); |
3e984472 | 1278 | #endif /* SMARTCARD */ |
93a56445 | 1279 | } |
5260325f | 1280 | |
c35a6dc5 | 1281 | if (do_gen_candidates) { |
1282 | FILE *out = fopen(out_file, "w"); | |
b6453d99 | 1283 | |
c35a6dc5 | 1284 | if (out == NULL) { |
1285 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1286 | out_file, strerror(errno)); | |
1287 | return (1); | |
1288 | } | |
255d3e00 | 1289 | if (bits == 0) |
1290 | bits = DEFAULT_BITS; | |
c35a6dc5 | 1291 | if (gen_candidates(out, memory, bits, start) != 0) |
17318dd6 | 1292 | fatal("modulus candidate generation failed"); |
c35a6dc5 | 1293 | |
1294 | return (0); | |
1295 | } | |
1296 | ||
1297 | if (do_screen_candidates) { | |
1298 | FILE *in; | |
1299 | FILE *out = fopen(out_file, "w"); | |
1300 | ||
1301 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1302 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1303 | fatal("Couldn't open modulus candidate " | |
aff51935 | 1304 | "file \"%s\": %s", identity_file, |
c35a6dc5 | 1305 | strerror(errno)); |
1306 | } | |
1307 | } else | |
1308 | in = stdin; | |
1309 | ||
1310 | if (out == NULL) { | |
1311 | fatal("Couldn't open moduli file \"%s\": %s", | |
1312 | out_file, strerror(errno)); | |
1313 | } | |
1314 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
17318dd6 | 1315 | fatal("modulus screening failed"); |
08d035b6 | 1316 | return (0); |
c35a6dc5 | 1317 | } |
1318 | ||
5260325f | 1319 | arc4random_stir(); |
1320 | ||
882c9d5a | 1321 | if (key_type_name == NULL) |
1322 | key_type_name = "rsa"; | |
1323 | ||
c523303b | 1324 | type = key_type_from_name(key_type_name); |
1325 | if (type == KEY_UNSPEC) { | |
1326 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1327 | exit(1); | |
a306f2dd | 1328 | } |
255d3e00 | 1329 | if (bits == 0) |
1330 | bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; | |
6e94bd72 | 1331 | if (type == KEY_DSA && bits != 1024) |
1332 | fatal("DSA keys must be 1024 bits"); | |
60dc0294 | 1333 | if (!quiet) |
1334 | printf("Generating public/private %s key pair.\n", key_type_name); | |
fa08c86b | 1335 | private = key_generate(type, bits); |
1336 | if (private == NULL) { | |
1337 | fprintf(stderr, "key_generate failed"); | |
1338 | exit(1); | |
1339 | } | |
1340 | public = key_from_private(private); | |
5260325f | 1341 | |
1342 | if (!have_identity) | |
1343 | ask_filename(pw, "Enter file in which to save the key"); | |
1344 | ||
7b9b0103 | 1345 | /* Create ~/.ssh directory if it doesn't already exist. */ |
42f11eb2 | 1346 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 1347 | if (strstr(identity_file, dotsshdir) != NULL && |
1348 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 1349 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 1350 | error("Could not create directory '%s'.", dotsshdir); |
1351 | else if (!quiet) | |
1352 | printf("Created directory '%s'.\n", dotsshdir); | |
1353 | } | |
1354 | /* If the file already exists, ask the user to confirm. */ | |
1355 | if (stat(identity_file, &st) >= 0) { | |
1356 | char yesno[3]; | |
1357 | printf("%s already exists.\n", identity_file); | |
1358 | printf("Overwrite (y/n)? "); | |
1359 | fflush(stdout); | |
1360 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1361 | exit(1); | |
1362 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1363 | exit(1); | |
1364 | } | |
1365 | /* Ask for a passphrase (twice). */ | |
1366 | if (identity_passphrase) | |
1367 | passphrase1 = xstrdup(identity_passphrase); | |
1368 | else if (identity_new_passphrase) | |
1369 | passphrase1 = xstrdup(identity_new_passphrase); | |
1370 | else { | |
1371 | passphrase_again: | |
1372 | passphrase1 = | |
1843a425 | 1373 | read_passphrase("Enter passphrase (empty for no " |
1374 | "passphrase): ", RP_ALLOW_STDIN); | |
1375 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1376 | RP_ALLOW_STDIN); | |
5260325f | 1377 | if (strcmp(passphrase1, passphrase2) != 0) { |
1843a425 | 1378 | /* |
1379 | * The passphrases do not match. Clear them and | |
1380 | * retry. | |
1381 | */ | |
5260325f | 1382 | memset(passphrase1, 0, strlen(passphrase1)); |
1383 | memset(passphrase2, 0, strlen(passphrase2)); | |
1384 | xfree(passphrase1); | |
1385 | xfree(passphrase2); | |
1386 | printf("Passphrases do not match. Try again.\n"); | |
1387 | goto passphrase_again; | |
1388 | } | |
1389 | /* Clear the other copy of the passphrase. */ | |
1390 | memset(passphrase2, 0, strlen(passphrase2)); | |
1391 | xfree(passphrase2); | |
1392 | } | |
1393 | ||
5260325f | 1394 | if (identity_comment) { |
1395 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1396 | } else { | |
6ae2364d | 1397 | /* Create default commend field for the passphrase. */ |
5260325f | 1398 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
1399 | } | |
1400 | ||
1401 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 1402 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 1403 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 1404 | memset(passphrase1, 0, strlen(passphrase1)); |
1405 | xfree(passphrase1); | |
1406 | exit(1); | |
1407 | } | |
1408 | /* Clear the passphrase. */ | |
1409 | memset(passphrase1, 0, strlen(passphrase1)); | |
1410 | xfree(passphrase1); | |
1411 | ||
1412 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 1413 | key_free(private); |
5260325f | 1414 | arc4random_stir(); |
1415 | ||
1416 | if (!quiet) | |
1417 | printf("Your identification has been saved in %s.\n", identity_file); | |
1418 | ||
5260325f | 1419 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1420 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1421 | if (fd == -1) { | |
5260325f | 1422 | printf("Could not save your public key in %s\n", identity_file); |
1423 | exit(1); | |
1424 | } | |
1c9a907f | 1425 | f = fdopen(fd, "w"); |
1426 | if (f == NULL) { | |
1427 | printf("fdopen %s failed", identity_file); | |
1428 | exit(1); | |
1429 | } | |
a306f2dd | 1430 | if (!key_write(public, f)) |
1431 | fprintf(stderr, "write key failed"); | |
1432 | fprintf(f, " %s\n", comment); | |
5260325f | 1433 | fclose(f); |
1434 | ||
1435 | if (!quiet) { | |
22138a36 | 1436 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 1437 | printf("Your public key has been saved in %s.\n", |
1438 | identity_file); | |
5260325f | 1439 | printf("The key fingerprint is:\n"); |
22138a36 | 1440 | printf("%s %s\n", fp, comment); |
1441 | xfree(fp); | |
8efc0c15 | 1442 | } |
a306f2dd | 1443 | |
1444 | key_free(public); | |
5260325f | 1445 | exit(0); |
8efc0c15 | 1446 | } |