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d3221cca | 1 | /* $OpenBSD: ssh-keygen.c,v 1.147 2006/07/09 15:15:11 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 | |
d3221cca | 24 | #include <fcntl.h> |
b1842393 | 25 | #include <paths.h> |
26 | #include <pwd.h> | |
27 | ||
8efc0c15 | 28 | #include "xmalloc.h" |
a306f2dd | 29 | #include "key.h" |
457fc0c6 | 30 | #include "rsa.h" |
a306f2dd | 31 | #include "authfile.h" |
32 | #include "uuencode.h" | |
94ec8c6b | 33 | #include "buffer.h" |
34 | #include "bufaux.h" | |
42f11eb2 | 35 | #include "pathnames.h" |
36 | #include "log.h" | |
58ae9cb8 | 37 | #include "misc.h" |
bdffbcdc | 38 | #include "match.h" |
39 | #include "hostfile.h" | |
0cbe25f0 | 40 | #include "dns.h" |
94ec8c6b | 41 | |
93a56445 | 42 | #ifdef SMARTCARD |
93a56445 | 43 | #include "scard.h" |
dd2495cb | 44 | #endif |
2b30154a | 45 | |
255d3e00 | 46 | /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ |
47 | #define DEFAULT_BITS 2048 | |
48 | #define DEFAULT_BITS_DSA 1024 | |
49 | u_int32_t bits = 0; | |
8efc0c15 | 50 | |
aa3378df | 51 | /* |
52 | * Flag indicating that we just want to change the passphrase. This can be | |
53 | * set on the command line. | |
54 | */ | |
8efc0c15 | 55 | int change_passphrase = 0; |
56 | ||
aa3378df | 57 | /* |
58 | * Flag indicating that we just want to change the comment. This can be set | |
59 | * on the command line. | |
60 | */ | |
8efc0c15 | 61 | int change_comment = 0; |
62 | ||
63 | int quiet = 0; | |
64 | ||
bdffbcdc | 65 | /* Flag indicating that we want to hash a known_hosts file */ |
66 | int hash_hosts = 0; | |
67 | /* Flag indicating that we want lookup a host in known_hosts file */ | |
68 | int find_host = 0; | |
69 | /* Flag indicating that we want to delete a host from a known_hosts file */ | |
70 | int delete_host = 0; | |
71 | ||
f095fcc7 | 72 | /* Flag indicating that we just want to see the key fingerprint */ |
73 | int print_fingerprint = 0; | |
aaf45d87 | 74 | int print_bubblebabble = 0; |
f095fcc7 | 75 | |
5ad13cd7 | 76 | /* The identity file name, given on the command line or entered by the user. */ |
77 | char identity_file[1024]; | |
78 | int have_identity = 0; | |
8efc0c15 | 79 | |
80 | /* This is set to the passphrase if given on the command line. */ | |
81 | char *identity_passphrase = NULL; | |
82 | ||
83 | /* This is set to the new passphrase if given on the command line. */ | |
84 | char *identity_new_passphrase = NULL; | |
85 | ||
86 | /* This is set to the new comment if given on the command line. */ | |
87 | char *identity_comment = NULL; | |
88 | ||
a306f2dd | 89 | /* Dump public key file in format used by real and the original SSH 2 */ |
90 | int convert_to_ssh2 = 0; | |
91 | int convert_from_ssh2 = 0; | |
92 | int print_public = 0; | |
21289cd0 | 93 | int print_generic = 0; |
fa08c86b | 94 | |
3dc93cd8 | 95 | char *key_type_name = NULL; |
a306f2dd | 96 | |
5ad13cd7 | 97 | /* argv0 */ |
98 | extern char *__progname; | |
8efc0c15 | 99 | |
a306f2dd | 100 | char hostname[MAXHOSTNAMELEN]; |
101 | ||
20eea1d7 | 102 | /* moduli.c */ |
c784ae09 | 103 | int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
20eea1d7 | 104 | int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
105 | ||
396c147e | 106 | static void |
5ad13cd7 | 107 | ask_filename(struct passwd *pw, const char *prompt) |
8efc0c15 | 108 | { |
5260325f | 109 | char buf[1024]; |
c523303b | 110 | char *name = NULL; |
111 | ||
8d22d775 | 112 | if (key_type_name == NULL) |
42f11eb2 | 113 | name = _PATH_SSH_CLIENT_ID_RSA; |
32596c7b | 114 | else { |
8d22d775 | 115 | switch (key_type_from_name(key_type_name)) { |
116 | case KEY_RSA1: | |
117 | name = _PATH_SSH_CLIENT_IDENTITY; | |
118 | break; | |
119 | case KEY_DSA: | |
120 | name = _PATH_SSH_CLIENT_ID_DSA; | |
121 | break; | |
122 | case KEY_RSA: | |
123 | name = _PATH_SSH_CLIENT_ID_RSA; | |
124 | break; | |
125 | default: | |
126 | fprintf(stderr, "bad key type"); | |
127 | exit(1); | |
128 | break; | |
129 | } | |
32596c7b | 130 | } |
c523303b | 131 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
8d88011e | 132 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
5260325f | 133 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
134 | exit(1); | |
135 | if (strchr(buf, '\n')) | |
136 | *strchr(buf, '\n') = 0; | |
137 | if (strcmp(buf, "") != 0) | |
138 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
139 | have_identity = 1; | |
f095fcc7 | 140 | } |
8efc0c15 | 141 | |
396c147e | 142 | static Key * |
abe0fb9f | 143 | load_identity(char *filename) |
a306f2dd | 144 | { |
aeaa3d9e | 145 | char *pass; |
146 | Key *prv; | |
147 | ||
cd332296 | 148 | prv = key_load_private(filename, "", NULL); |
aeaa3d9e | 149 | if (prv == NULL) { |
abe0fb9f | 150 | if (identity_passphrase) |
151 | pass = xstrdup(identity_passphrase); | |
152 | else | |
1843a425 | 153 | pass = read_passphrase("Enter passphrase: ", |
154 | RP_ALLOW_STDIN); | |
aeaa3d9e | 155 | prv = key_load_private(filename, pass, NULL); |
a306f2dd | 156 | memset(pass, 0, strlen(pass)); |
157 | xfree(pass); | |
158 | } | |
aeaa3d9e | 159 | return prv; |
a306f2dd | 160 | } |
161 | ||
94ec8c6b | 162 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
7203d6bb | 163 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
94ec8c6b | 164 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
2b87da3b | 165 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 166 | |
396c147e | 167 | static void |
a306f2dd | 168 | do_convert_to_ssh2(struct passwd *pw) |
169 | { | |
b587c165 | 170 | Key *k; |
21b30f38 | 171 | u_int len; |
1e3b8b07 | 172 | u_char *blob; |
a306f2dd | 173 | struct stat st; |
174 | ||
175 | if (!have_identity) | |
176 | ask_filename(pw, "Enter file in which the key is"); | |
177 | if (stat(identity_file, &st) < 0) { | |
178 | perror(identity_file); | |
179 | exit(1); | |
180 | } | |
b587c165 | 181 | if ((k = key_load_public(identity_file, NULL)) == NULL) { |
abe0fb9f | 182 | if ((k = load_identity(identity_file)) == NULL) { |
b587c165 | 183 | fprintf(stderr, "load failed\n"); |
184 | exit(1); | |
185 | } | |
a306f2dd | 186 | } |
3566c73c | 187 | if (k->type == KEY_RSA1) { |
188 | fprintf(stderr, "version 1 keys are not supported\n"); | |
189 | exit(1); | |
190 | } | |
f7436b8c | 191 | if (key_to_blob(k, &blob, &len) <= 0) { |
192 | fprintf(stderr, "key_to_blob failed\n"); | |
193 | exit(1); | |
194 | } | |
94ec8c6b | 195 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 196 | fprintf(stdout, |
512df038 | 197 | "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", |
b587c165 | 198 | key_size(k), key_type(k), |
a306f2dd | 199 | pw->pw_name, hostname); |
200 | dump_base64(stdout, blob, len); | |
94ec8c6b | 201 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
b587c165 | 202 | key_free(k); |
a306f2dd | 203 | xfree(blob); |
204 | exit(0); | |
205 | } | |
206 | ||
396c147e | 207 | static void |
94ec8c6b | 208 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
209 | { | |
ca75d7de | 210 | u_int bignum_bits = buffer_get_int(b); |
211 | u_int bytes = (bignum_bits + 7) / 8; | |
457fc0c6 | 212 | |
94ec8c6b | 213 | if (buffer_len(b) < bytes) |
457fc0c6 | 214 | fatal("buffer_get_bignum_bits: input buffer too small: " |
215 | "need %d have %d", bytes, buffer_len(b)); | |
20905a8e | 216 | BN_bin2bn(buffer_ptr(b), bytes, value); |
94ec8c6b | 217 | buffer_consume(b, bytes); |
218 | } | |
219 | ||
396c147e | 220 | static Key * |
c66f9d0e | 221 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
94ec8c6b | 222 | { |
223 | Buffer b; | |
94ec8c6b | 224 | Key *key = NULL; |
a599bd06 | 225 | char *type, *cipher; |
d3260e12 | 226 | u_char *sig, data[] = "abcde12345"; |
2e0becb6 | 227 | int magic, rlen, ktype, i1, i2, i3, i4; |
a599bd06 | 228 | u_int slen; |
2e0becb6 | 229 | u_long e; |
94ec8c6b | 230 | |
231 | buffer_init(&b); | |
232 | buffer_append(&b, blob, blen); | |
233 | ||
234 | magic = buffer_get_int(&b); | |
235 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
236 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
237 | buffer_free(&b); | |
238 | return NULL; | |
239 | } | |
2e0becb6 | 240 | i1 = buffer_get_int(&b); |
94ec8c6b | 241 | type = buffer_get_string(&b, NULL); |
242 | cipher = buffer_get_string(&b, NULL); | |
2e0becb6 | 243 | i2 = buffer_get_int(&b); |
244 | i3 = buffer_get_int(&b); | |
245 | i4 = buffer_get_int(&b); | |
246 | debug("ignore (%d %d %d %d)", i1,i2,i3,i4); | |
94ec8c6b | 247 | if (strcmp(cipher, "none") != 0) { |
248 | error("unsupported cipher %s", cipher); | |
249 | xfree(cipher); | |
250 | buffer_free(&b); | |
457fc0c6 | 251 | xfree(type); |
94ec8c6b | 252 | return NULL; |
253 | } | |
254 | xfree(cipher); | |
255 | ||
457fc0c6 | 256 | if (strstr(type, "dsa")) { |
257 | ktype = KEY_DSA; | |
258 | } else if (strstr(type, "rsa")) { | |
259 | ktype = KEY_RSA; | |
260 | } else { | |
3c460ede | 261 | buffer_free(&b); |
457fc0c6 | 262 | xfree(type); |
94ec8c6b | 263 | return NULL; |
264 | } | |
457fc0c6 | 265 | key = key_new_private(ktype); |
266 | xfree(type); | |
267 | ||
268 | switch (key->type) { | |
269 | case KEY_DSA: | |
270 | buffer_get_bignum_bits(&b, key->dsa->p); | |
271 | buffer_get_bignum_bits(&b, key->dsa->g); | |
272 | buffer_get_bignum_bits(&b, key->dsa->q); | |
273 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
274 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
275 | break; | |
276 | case KEY_RSA: | |
2e0becb6 | 277 | e = buffer_get_char(&b); |
278 | debug("e %lx", e); | |
279 | if (e < 30) { | |
280 | e <<= 8; | |
281 | e += buffer_get_char(&b); | |
282 | debug("e %lx", e); | |
283 | e <<= 8; | |
284 | e += buffer_get_char(&b); | |
285 | debug("e %lx", e); | |
286 | } | |
287 | if (!BN_set_word(key->rsa->e, e)) { | |
457fc0c6 | 288 | buffer_free(&b); |
289 | key_free(key); | |
290 | return NULL; | |
291 | } | |
292 | buffer_get_bignum_bits(&b, key->rsa->d); | |
293 | buffer_get_bignum_bits(&b, key->rsa->n); | |
294 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
295 | buffer_get_bignum_bits(&b, key->rsa->q); | |
296 | buffer_get_bignum_bits(&b, key->rsa->p); | |
2b63e803 | 297 | rsa_generate_additional_parameters(key->rsa); |
457fc0c6 | 298 | break; |
299 | } | |
94ec8c6b | 300 | rlen = buffer_len(&b); |
6aacefa7 | 301 | if (rlen != 0) |
457fc0c6 | 302 | error("do_convert_private_ssh2_from_blob: " |
303 | "remaining bytes in key blob %d", rlen); | |
94ec8c6b | 304 | buffer_free(&b); |
a599bd06 | 305 | |
306 | /* try the key */ | |
307 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
308 | key_verify(key, sig, slen, data, sizeof(data)); | |
309 | xfree(sig); | |
94ec8c6b | 310 | return key; |
311 | } | |
312 | ||
15b81af3 | 313 | static int |
314 | get_line(FILE *fp, char *line, size_t len) | |
315 | { | |
316 | int c; | |
317 | size_t pos = 0; | |
318 | ||
319 | line[0] = '\0'; | |
320 | while ((c = fgetc(fp)) != EOF) { | |
321 | if (pos >= len - 1) { | |
322 | fprintf(stderr, "input line too long.\n"); | |
323 | exit(1); | |
324 | } | |
32596c7b | 325 | switch (c) { |
15b81af3 | 326 | case '\r': |
327 | c = fgetc(fp); | |
328 | if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { | |
329 | fprintf(stderr, "unget: %s\n", strerror(errno)); | |
330 | exit(1); | |
331 | } | |
332 | return pos; | |
333 | case '\n': | |
334 | return pos; | |
335 | } | |
336 | line[pos++] = c; | |
337 | line[pos] = '\0'; | |
338 | } | |
2ccf5424 | 339 | if (c == EOF) |
340 | return -1; | |
15b81af3 | 341 | return pos; |
342 | } | |
343 | ||
396c147e | 344 | static void |
a306f2dd | 345 | do_convert_from_ssh2(struct passwd *pw) |
346 | { | |
347 | Key *k; | |
348 | int blen; | |
783dbbdc | 349 | u_int len; |
15b81af3 | 350 | char line[1024]; |
cf54363d | 351 | u_char blob[8096]; |
a306f2dd | 352 | char encoded[8096]; |
353 | struct stat st; | |
94ec8c6b | 354 | int escaped = 0, private = 0, ok; |
a306f2dd | 355 | FILE *fp; |
356 | ||
357 | if (!have_identity) | |
358 | ask_filename(pw, "Enter file in which the key is"); | |
359 | if (stat(identity_file, &st) < 0) { | |
360 | perror(identity_file); | |
361 | exit(1); | |
362 | } | |
363 | fp = fopen(identity_file, "r"); | |
364 | if (fp == NULL) { | |
365 | perror(identity_file); | |
366 | exit(1); | |
367 | } | |
368 | encoded[0] = '\0'; | |
15b81af3 | 369 | while ((blen = get_line(fp, line, sizeof(line))) != -1) { |
370 | if (line[blen - 1] == '\\') | |
d0c832f3 | 371 | escaped++; |
a306f2dd | 372 | if (strncmp(line, "----", 4) == 0 || |
373 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 374 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
375 | private = 1; | |
a599bd06 | 376 | if (strstr(line, " END ") != NULL) { |
377 | break; | |
378 | } | |
012bc0e1 | 379 | /* fprintf(stderr, "ignore: %s", line); */ |
a306f2dd | 380 | continue; |
381 | } | |
d0c832f3 | 382 | if (escaped) { |
383 | escaped--; | |
012bc0e1 | 384 | /* fprintf(stderr, "escaped: %s", line); */ |
d0c832f3 | 385 | continue; |
a306f2dd | 386 | } |
a306f2dd | 387 | strlcat(encoded, line, sizeof(encoded)); |
388 | } | |
783dbbdc | 389 | len = strlen(encoded); |
390 | if (((len % 4) == 3) && | |
391 | (encoded[len-1] == '=') && | |
392 | (encoded[len-2] == '=') && | |
393 | (encoded[len-3] == '=')) | |
394 | encoded[len-3] = '\0'; | |
e6207598 | 395 | blen = uudecode(encoded, blob, sizeof(blob)); |
a306f2dd | 396 | if (blen < 0) { |
397 | fprintf(stderr, "uudecode failed.\n"); | |
398 | exit(1); | |
399 | } | |
94ec8c6b | 400 | k = private ? |
401 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 402 | key_from_blob(blob, blen); |
94ec8c6b | 403 | if (k == NULL) { |
404 | fprintf(stderr, "decode blob failed.\n"); | |
405 | exit(1); | |
406 | } | |
407 | ok = private ? | |
457fc0c6 | 408 | (k->type == KEY_DSA ? |
409 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
410 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
94ec8c6b | 411 | key_write(k, stdout); |
412 | if (!ok) { | |
413 | fprintf(stderr, "key write failed"); | |
414 | exit(1); | |
415 | } | |
a306f2dd | 416 | key_free(k); |
4ccb828d | 417 | if (!private) |
418 | fprintf(stdout, "\n"); | |
a306f2dd | 419 | fclose(fp); |
420 | exit(0); | |
421 | } | |
422 | ||
396c147e | 423 | static void |
a306f2dd | 424 | do_print_public(struct passwd *pw) |
425 | { | |
aeaa3d9e | 426 | Key *prv; |
a306f2dd | 427 | struct stat st; |
428 | ||
429 | if (!have_identity) | |
430 | ask_filename(pw, "Enter file in which the key is"); | |
431 | if (stat(identity_file, &st) < 0) { | |
432 | perror(identity_file); | |
433 | exit(1); | |
434 | } | |
abe0fb9f | 435 | prv = load_identity(identity_file); |
aeaa3d9e | 436 | if (prv == NULL) { |
a306f2dd | 437 | fprintf(stderr, "load failed\n"); |
438 | exit(1); | |
439 | } | |
aeaa3d9e | 440 | if (!key_write(prv, stdout)) |
a306f2dd | 441 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 442 | key_free(prv); |
a306f2dd | 443 | fprintf(stdout, "\n"); |
444 | exit(0); | |
445 | } | |
446 | ||
4f831fd7 | 447 | #ifdef SMARTCARD |
2b30154a | 448 | static void |
93a56445 | 449 | do_upload(struct passwd *pw, const char *sc_reader_id) |
2b30154a | 450 | { |
2b30154a | 451 | Key *prv = NULL; |
452 | struct stat st; | |
b9f62352 | 453 | int ret; |
454 | ||
2b30154a | 455 | if (!have_identity) |
456 | ask_filename(pw, "Enter file in which the key is"); | |
457 | if (stat(identity_file, &st) < 0) { | |
458 | perror(identity_file); | |
b9f62352 | 459 | exit(1); |
2b30154a | 460 | } |
461 | prv = load_identity(identity_file); | |
462 | if (prv == NULL) { | |
463 | error("load failed"); | |
b9f62352 | 464 | exit(1); |
49ccba9c | 465 | } |
b9f62352 | 466 | ret = sc_put_key(prv, sc_reader_id); |
467 | key_free(prv); | |
468 | if (ret < 0) | |
469 | exit(1); | |
bbe88b6d | 470 | logit("loading key done"); |
b9f62352 | 471 | exit(0); |
2b30154a | 472 | } |
93a56445 | 473 | |
474 | static void | |
475 | do_download(struct passwd *pw, const char *sc_reader_id) | |
476 | { | |
0659cace | 477 | Key **keys = NULL; |
478 | int i; | |
93a56445 | 479 | |
0659cace | 480 | keys = sc_get_keys(sc_reader_id, NULL); |
481 | if (keys == NULL) | |
93a56445 | 482 | fatal("cannot read public key from smartcard"); |
0659cace | 483 | for (i = 0; keys[i]; i++) { |
484 | key_write(keys[i], stdout); | |
485 | key_free(keys[i]); | |
486 | fprintf(stdout, "\n"); | |
487 | } | |
488 | xfree(keys); | |
93a56445 | 489 | exit(0); |
490 | } | |
3e984472 | 491 | #endif /* SMARTCARD */ |
2b30154a | 492 | |
396c147e | 493 | static void |
f095fcc7 | 494 | do_fingerprint(struct passwd *pw) |
495 | { | |
c8d54615 | 496 | FILE *f; |
a306f2dd | 497 | Key *public; |
aaf45d87 | 498 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
17a3011c | 499 | int i, skip = 0, num = 1, invalid = 1; |
500 | enum fp_rep rep; | |
501 | enum fp_type fptype; | |
5260325f | 502 | struct stat st; |
503 | ||
aeaa3d9e | 504 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
505 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 506 | |
5260325f | 507 | if (!have_identity) |
508 | ask_filename(pw, "Enter file in which the key is"); | |
509 | if (stat(identity_file, &st) < 0) { | |
510 | perror(identity_file); | |
511 | exit(1); | |
512 | } | |
aeaa3d9e | 513 | public = key_load_public(identity_file, &comment); |
514 | if (public != NULL) { | |
515 | fp = key_fingerprint(public, fptype, rep); | |
512df038 | 516 | printf("%u %s %s\n", key_size(public), fp, comment); |
a306f2dd | 517 | key_free(public); |
fa08c86b | 518 | xfree(comment); |
aaf45d87 | 519 | xfree(fp); |
c8d54615 | 520 | exit(0); |
521 | } | |
2b8dc5e3 | 522 | if (comment) { |
aeaa3d9e | 523 | xfree(comment); |
2b8dc5e3 | 524 | comment = NULL; |
525 | } | |
c8d54615 | 526 | |
527 | f = fopen(identity_file, "r"); | |
528 | if (f != NULL) { | |
c8d54615 | 529 | while (fgets(line, sizeof(line), f)) { |
530 | i = strlen(line) - 1; | |
531 | if (line[i] != '\n') { | |
532 | error("line %d too long: %.40s...", num, line); | |
533 | skip = 1; | |
534 | continue; | |
535 | } | |
536 | num++; | |
537 | if (skip) { | |
538 | skip = 0; | |
539 | continue; | |
540 | } | |
541 | line[i] = '\0'; | |
542 | ||
543 | /* Skip leading whitespace, empty and comment lines. */ | |
544 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
545 | ; | |
546 | if (!*cp || *cp == '\n' || *cp == '#') | |
547 | continue ; | |
548 | i = strtol(cp, &ep, 10); | |
549 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
550 | int quoted = 0; | |
551 | comment = cp; | |
512df038 | 552 | for (; *cp && (quoted || (*cp != ' ' && |
553 | *cp != '\t')); cp++) { | |
c8d54615 | 554 | if (*cp == '\\' && cp[1] == '"') |
555 | cp++; /* Skip both */ | |
556 | else if (*cp == '"') | |
557 | quoted = !quoted; | |
558 | } | |
559 | if (!*cp) | |
560 | continue; | |
561 | *cp++ = '\0'; | |
562 | } | |
563 | ep = cp; | |
efcae5b1 | 564 | public = key_new(KEY_RSA1); |
565 | if (key_read(public, &cp) != 1) { | |
566 | cp = ep; | |
567 | key_free(public); | |
568 | public = key_new(KEY_UNSPEC); | |
569 | if (key_read(public, &cp) != 1) { | |
570 | key_free(public); | |
571 | continue; | |
572 | } | |
5260325f | 573 | } |
efcae5b1 | 574 | comment = *cp ? cp : comment; |
aeaa3d9e | 575 | fp = key_fingerprint(public, fptype, rep); |
512df038 | 576 | printf("%u %s %s\n", key_size(public), fp, |
efcae5b1 | 577 | comment ? comment : "no comment"); |
aaf45d87 | 578 | xfree(fp); |
aeaa3d9e | 579 | key_free(public); |
efcae5b1 | 580 | invalid = 0; |
5260325f | 581 | } |
c8d54615 | 582 | fclose(f); |
583 | } | |
584 | if (invalid) { | |
f564d016 | 585 | printf("%s is not a public key file.\n", identity_file); |
c8d54615 | 586 | exit(1); |
5260325f | 587 | } |
5260325f | 588 | exit(0); |
f095fcc7 | 589 | } |
590 | ||
bdffbcdc | 591 | static void |
592 | print_host(FILE *f, char *name, Key *public, int hash) | |
593 | { | |
594 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
595 | fatal("hash_host failed"); | |
596 | fprintf(f, "%s ", name); | |
597 | if (!key_write(public, f)) | |
598 | fatal("key_write failed"); | |
599 | fprintf(f, "\n"); | |
600 | } | |
601 | ||
602 | static void | |
603 | do_known_hosts(struct passwd *pw, const char *name) | |
604 | { | |
605 | FILE *in, *out = stdout; | |
606 | Key *public; | |
607 | char *cp, *cp2, *kp, *kp2; | |
608 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
609 | int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; | |
610 | ||
611 | if (!have_identity) { | |
612 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
613 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
614 | sizeof(identity_file)) | |
615 | fatal("Specified known hosts path too long"); | |
616 | xfree(cp); | |
617 | have_identity = 1; | |
618 | } | |
619 | if ((in = fopen(identity_file, "r")) == NULL) | |
620 | fatal("fopen: %s", strerror(errno)); | |
621 | ||
622 | /* | |
623 | * Find hosts goes to stdout, hash and deletions happen in-place | |
624 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
625 | */ | |
626 | if (!find_host && (hash_hosts || delete_host)) { | |
627 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
628 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
629 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
630 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
631 | fatal("known_hosts path too long"); | |
632 | umask(077); | |
633 | if ((c = mkstemp(tmp)) == -1) | |
634 | fatal("mkstemp: %s", strerror(errno)); | |
635 | if ((out = fdopen(c, "w")) == NULL) { | |
636 | c = errno; | |
637 | unlink(tmp); | |
638 | fatal("fdopen: %s", strerror(c)); | |
639 | } | |
640 | inplace = 1; | |
641 | } | |
642 | ||
643 | while (fgets(line, sizeof(line), in)) { | |
644 | num++; | |
645 | i = strlen(line) - 1; | |
646 | if (line[i] != '\n') { | |
647 | error("line %d too long: %.40s...", num, line); | |
648 | skip = 1; | |
649 | invalid = 1; | |
650 | continue; | |
651 | } | |
652 | if (skip) { | |
653 | skip = 0; | |
654 | continue; | |
655 | } | |
656 | line[i] = '\0'; | |
657 | ||
658 | /* Skip leading whitespace, empty and comment lines. */ | |
659 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
660 | ; | |
661 | if (!*cp || *cp == '\n' || *cp == '#') { | |
662 | if (inplace) | |
663 | fprintf(out, "%s\n", cp); | |
664 | continue; | |
665 | } | |
666 | /* Find the end of the host name portion. */ | |
667 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
668 | ; | |
669 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
670 | error("line %d missing key: %.40s...", | |
671 | num, line); | |
672 | invalid = 1; | |
673 | continue; | |
674 | } | |
675 | *kp++ = '\0'; | |
676 | kp2 = kp; | |
677 | ||
678 | public = key_new(KEY_RSA1); | |
679 | if (key_read(public, &kp) != 1) { | |
680 | kp = kp2; | |
681 | key_free(public); | |
682 | public = key_new(KEY_UNSPEC); | |
683 | if (key_read(public, &kp) != 1) { | |
684 | error("line %d invalid key: %.40s...", | |
685 | num, line); | |
686 | key_free(public); | |
687 | invalid = 1; | |
688 | continue; | |
689 | } | |
690 | } | |
691 | ||
692 | if (*cp == HASH_DELIM) { | |
693 | if (find_host || delete_host) { | |
694 | cp2 = host_hash(name, cp, strlen(cp)); | |
695 | if (cp2 == NULL) { | |
696 | error("line %d: invalid hashed " | |
697 | "name: %.64s...", num, line); | |
698 | invalid = 1; | |
699 | continue; | |
700 | } | |
701 | c = (strcmp(cp2, cp) == 0); | |
702 | if (find_host && c) { | |
703 | printf("# Host %s found: " | |
704 | "line %d type %s\n", name, | |
705 | num, key_type(public)); | |
706 | print_host(out, cp, public, 0); | |
707 | } | |
708 | if (delete_host && !c) | |
709 | print_host(out, cp, public, 0); | |
710 | } else if (hash_hosts) | |
711 | print_host(out, cp, public, 0); | |
712 | } else { | |
713 | if (find_host || delete_host) { | |
714 | c = (match_hostname(name, cp, | |
715 | strlen(cp)) == 1); | |
716 | if (find_host && c) { | |
717 | printf("# Host %s found: " | |
718 | "line %d type %s\n", name, | |
719 | num, key_type(public)); | |
720 | print_host(out, cp, public, hash_hosts); | |
721 | } | |
722 | if (delete_host && !c) | |
723 | print_host(out, cp, public, 0); | |
724 | } else if (hash_hosts) { | |
f8cc7664 | 725 | for (cp2 = strsep(&cp, ","); |
bdffbcdc | 726 | cp2 != NULL && *cp2 != '\0'; |
bc7119ba | 727 | cp2 = strsep(&cp, ",")) { |
728 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
729 | fprintf(stderr, "Warning: " | |
730 | "ignoring host name with " | |
731 | "metacharacters: %.64s\n", | |
732 | cp2); | |
733 | else | |
734 | print_host(out, cp2, public, 1); | |
735 | } | |
bdffbcdc | 736 | has_unhashed = 1; |
737 | } | |
738 | } | |
739 | key_free(public); | |
740 | } | |
741 | fclose(in); | |
742 | ||
743 | if (invalid) { | |
744 | fprintf(stderr, "%s is not a valid known_host file.\n", | |
745 | identity_file); | |
746 | if (inplace) { | |
747 | fprintf(stderr, "Not replacing existing known_hosts " | |
604dac32 | 748 | "file because of errors\n"); |
bdffbcdc | 749 | fclose(out); |
750 | unlink(tmp); | |
751 | } | |
752 | exit(1); | |
753 | } | |
754 | ||
755 | if (inplace) { | |
756 | fclose(out); | |
757 | ||
758 | /* Backup existing file */ | |
759 | if (unlink(old) == -1 && errno != ENOENT) | |
760 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
761 | if (link(identity_file, old) == -1) | |
762 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
763 | strerror(errno)); | |
764 | /* Move new one into place */ | |
765 | if (rename(tmp, identity_file) == -1) { | |
766 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
767 | strerror(errno)); | |
768 | unlink(tmp); | |
769 | unlink(old); | |
770 | exit(1); | |
771 | } | |
772 | ||
773 | fprintf(stderr, "%s updated.\n", identity_file); | |
774 | fprintf(stderr, "Original contents retained as %s\n", old); | |
775 | if (has_unhashed) { | |
776 | fprintf(stderr, "WARNING: %s contains unhashed " | |
777 | "entries\n", old); | |
778 | fprintf(stderr, "Delete this file to ensure privacy " | |
4e2e5cfd | 779 | "of hostnames\n"); |
bdffbcdc | 780 | } |
781 | } | |
782 | ||
783 | exit(0); | |
784 | } | |
785 | ||
5260325f | 786 | /* |
787 | * Perform changing a passphrase. The argument is the passwd structure | |
788 | * for the current user. | |
789 | */ | |
396c147e | 790 | static void |
f095fcc7 | 791 | do_change_passphrase(struct passwd *pw) |
792 | { | |
5260325f | 793 | char *comment; |
794 | char *old_passphrase, *passphrase1, *passphrase2; | |
795 | struct stat st; | |
a306f2dd | 796 | Key *private; |
5260325f | 797 | |
798 | if (!have_identity) | |
799 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 800 | if (stat(identity_file, &st) < 0) { |
801 | perror(identity_file); | |
802 | exit(1); | |
803 | } | |
5260325f | 804 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 805 | private = key_load_private(identity_file, "", &comment); |
806 | if (private == NULL) { | |
5260325f | 807 | if (identity_passphrase) |
808 | old_passphrase = xstrdup(identity_passphrase); | |
809 | else | |
1843a425 | 810 | old_passphrase = |
811 | read_passphrase("Enter old passphrase: ", | |
812 | RP_ALLOW_STDIN); | |
813 | private = key_load_private(identity_file, old_passphrase, | |
814 | &comment); | |
aeaa3d9e | 815 | memset(old_passphrase, 0, strlen(old_passphrase)); |
816 | xfree(old_passphrase); | |
817 | if (private == NULL) { | |
5260325f | 818 | printf("Bad passphrase.\n"); |
819 | exit(1); | |
820 | } | |
5260325f | 821 | } |
822 | printf("Key has comment '%s'\n", comment); | |
823 | ||
824 | /* Ask the new passphrase (twice). */ | |
825 | if (identity_new_passphrase) { | |
826 | passphrase1 = xstrdup(identity_new_passphrase); | |
827 | passphrase2 = NULL; | |
828 | } else { | |
829 | passphrase1 = | |
1843a425 | 830 | read_passphrase("Enter new passphrase (empty for no " |
831 | "passphrase): ", RP_ALLOW_STDIN); | |
832 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
184eed6a | 833 | RP_ALLOW_STDIN); |
5260325f | 834 | |
835 | /* Verify that they are the same. */ | |
836 | if (strcmp(passphrase1, passphrase2) != 0) { | |
837 | memset(passphrase1, 0, strlen(passphrase1)); | |
838 | memset(passphrase2, 0, strlen(passphrase2)); | |
839 | xfree(passphrase1); | |
840 | xfree(passphrase2); | |
841 | printf("Pass phrases do not match. Try again.\n"); | |
842 | exit(1); | |
843 | } | |
844 | /* Destroy the other copy. */ | |
845 | memset(passphrase2, 0, strlen(passphrase2)); | |
846 | xfree(passphrase2); | |
8efc0c15 | 847 | } |
8efc0c15 | 848 | |
5260325f | 849 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 850 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 851 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 852 | memset(passphrase1, 0, strlen(passphrase1)); |
853 | xfree(passphrase1); | |
a306f2dd | 854 | key_free(private); |
5260325f | 855 | xfree(comment); |
856 | exit(1); | |
857 | } | |
858 | /* Destroy the passphrase and the copy of the key in memory. */ | |
859 | memset(passphrase1, 0, strlen(passphrase1)); | |
860 | xfree(passphrase1); | |
a306f2dd | 861 | key_free(private); /* Destroys contents */ |
5260325f | 862 | xfree(comment); |
863 | ||
864 | printf("Your identification has been saved with the new passphrase.\n"); | |
865 | exit(0); | |
866 | } | |
8efc0c15 | 867 | |
21289cd0 | 868 | /* |
869 | * Print the SSHFP RR. | |
870 | */ | |
3eff92ec | 871 | static int |
872 | do_print_resource_record(struct passwd *pw, char *fname, char *hname) | |
21289cd0 | 873 | { |
874 | Key *public; | |
875 | char *comment = NULL; | |
876 | struct stat st; | |
877 | ||
3eff92ec | 878 | if (fname == NULL) |
21289cd0 | 879 | ask_filename(pw, "Enter file in which the key is"); |
3eff92ec | 880 | if (stat(fname, &st) < 0) { |
881 | if (errno == ENOENT) | |
882 | return 0; | |
883 | perror(fname); | |
21289cd0 | 884 | exit(1); |
885 | } | |
3eff92ec | 886 | public = key_load_public(fname, &comment); |
21289cd0 | 887 | if (public != NULL) { |
ca75d7de | 888 | export_dns_rr(hname, public, stdout, print_generic); |
21289cd0 | 889 | key_free(public); |
890 | xfree(comment); | |
3eff92ec | 891 | return 1; |
21289cd0 | 892 | } |
893 | if (comment) | |
894 | xfree(comment); | |
895 | ||
3eff92ec | 896 | printf("failed to read v2 public key from %s.\n", fname); |
21289cd0 | 897 | exit(1); |
898 | } | |
21289cd0 | 899 | |
5260325f | 900 | /* |
901 | * Change the comment of a private key file. | |
902 | */ | |
396c147e | 903 | static void |
8efc0c15 | 904 | do_change_comment(struct passwd *pw) |
905 | { | |
1c9a907f | 906 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 907 | Key *private; |
908 | Key *public; | |
5260325f | 909 | struct stat st; |
910 | FILE *f; | |
1c9a907f | 911 | int fd; |
5260325f | 912 | |
913 | if (!have_identity) | |
914 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 915 | if (stat(identity_file, &st) < 0) { |
916 | perror(identity_file); | |
917 | exit(1); | |
918 | } | |
aeaa3d9e | 919 | private = key_load_private(identity_file, "", &comment); |
920 | if (private == NULL) { | |
5260325f | 921 | if (identity_passphrase) |
922 | passphrase = xstrdup(identity_passphrase); | |
923 | else if (identity_new_passphrase) | |
924 | passphrase = xstrdup(identity_new_passphrase); | |
925 | else | |
1843a425 | 926 | passphrase = read_passphrase("Enter passphrase: ", |
927 | RP_ALLOW_STDIN); | |
5260325f | 928 | /* Try to load using the passphrase. */ |
aeaa3d9e | 929 | private = key_load_private(identity_file, passphrase, &comment); |
930 | if (private == NULL) { | |
5260325f | 931 | memset(passphrase, 0, strlen(passphrase)); |
932 | xfree(passphrase); | |
933 | printf("Bad passphrase.\n"); | |
934 | exit(1); | |
935 | } | |
aeaa3d9e | 936 | } else { |
937 | passphrase = xstrdup(""); | |
5260325f | 938 | } |
aeaa3d9e | 939 | if (private->type != KEY_RSA1) { |
940 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
941 | key_free(private); | |
942 | exit(1); | |
184eed6a | 943 | } |
5260325f | 944 | printf("Key now has comment '%s'\n", comment); |
945 | ||
946 | if (identity_comment) { | |
947 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
948 | } else { | |
949 | printf("Enter new comment: "); | |
950 | fflush(stdout); | |
951 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
952 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 953 | key_free(private); |
5260325f | 954 | exit(1); |
955 | } | |
5260325f | 956 | if (strchr(new_comment, '\n')) |
957 | *strchr(new_comment, '\n') = 0; | |
958 | } | |
959 | ||
960 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 961 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
58cfa257 | 962 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 963 | memset(passphrase, 0, strlen(passphrase)); |
964 | xfree(passphrase); | |
a306f2dd | 965 | key_free(private); |
5260325f | 966 | xfree(comment); |
967 | exit(1); | |
8efc0c15 | 968 | } |
5260325f | 969 | memset(passphrase, 0, strlen(passphrase)); |
970 | xfree(passphrase); | |
aeaa3d9e | 971 | public = key_from_private(private); |
a306f2dd | 972 | key_free(private); |
5260325f | 973 | |
5260325f | 974 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 975 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
976 | if (fd == -1) { | |
5260325f | 977 | printf("Could not save your public key in %s\n", identity_file); |
978 | exit(1); | |
979 | } | |
1c9a907f | 980 | f = fdopen(fd, "w"); |
981 | if (f == NULL) { | |
982 | printf("fdopen %s failed", identity_file); | |
983 | exit(1); | |
984 | } | |
a306f2dd | 985 | if (!key_write(public, f)) |
986 | fprintf(stderr, "write key failed"); | |
987 | key_free(public); | |
988 | fprintf(f, " %s\n", new_comment); | |
5260325f | 989 | fclose(f); |
990 | ||
991 | xfree(comment); | |
992 | ||
993 | printf("The comment in your key file has been changed.\n"); | |
994 | exit(0); | |
8efc0c15 | 995 | } |
996 | ||
396c147e | 997 | static void |
5ad13cd7 | 998 | usage(void) |
999 | { | |
58153e34 | 1000 | fprintf(stderr, "Usage: %s [options]\n", __progname); |
1001 | fprintf(stderr, "Options:\n"); | |
4feb61af | 1002 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
1003 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
58153e34 | 1004 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
4feb61af | 1005 | fprintf(stderr, " -C comment Provide new comment.\n"); |
58153e34 | 1006 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
4feb61af | 1007 | #ifdef SMARTCARD |
1008 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
1009 | #endif /* SMARTCARD */ | |
58153e34 | 1010 | fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n"); |
4feb61af | 1011 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
58153e34 | 1012 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
4feb61af | 1013 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
21289cd0 | 1014 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
4feb61af | 1015 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
58153e34 | 1016 | fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n"); |
1017 | fprintf(stderr, " -l Show fingerprint of key file.\n"); | |
4feb61af | 1018 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
58153e34 | 1019 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
1020 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
4feb61af | 1021 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
1022 | fprintf(stderr, " -q Quiet.\n"); | |
1023 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
21289cd0 | 1024 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
4feb61af | 1025 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
1026 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
1027 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
58153e34 | 1028 | #ifdef SMARTCARD |
58153e34 | 1029 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
1030 | #endif /* SMARTCARD */ | |
4feb61af | 1031 | fprintf(stderr, " -v Verbose.\n"); |
1032 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
1033 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
c35a6dc5 | 1034 | |
5260325f | 1035 | exit(1); |
5ad13cd7 | 1036 | } |
1037 | ||
5260325f | 1038 | /* |
1039 | * Main program for key management. | |
1040 | */ | |
8efc0c15 | 1041 | int |
1042 | main(int ac, char **av) | |
1043 | { | |
3dc93cd8 | 1044 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
8f52069e | 1045 | char out_file[MAXPATHLEN], *reader_id = NULL; |
bdffbcdc | 1046 | char *rr_hostname = NULL; |
1c9a907f | 1047 | Key *private, *public; |
5260325f | 1048 | struct passwd *pw; |
5260325f | 1049 | struct stat st; |
c784ae09 | 1050 | int opt, type, fd, download = 0; |
2a1995a3 | 1051 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; |
c35a6dc5 | 1052 | int do_gen_candidates = 0, do_screen_candidates = 0; |
c6fbc95a | 1053 | int log_level = SYSLOG_LEVEL_INFO; |
c35a6dc5 | 1054 | BIGNUM *start = NULL; |
5260325f | 1055 | FILE *f; |
de4feb6b | 1056 | const char *errstr; |
fa08c86b | 1057 | |
5260325f | 1058 | extern int optind; |
1059 | extern char *optarg; | |
1060 | ||
fd6168c1 | 1061 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1062 | sanitise_stdfd(); | |
1063 | ||
fda04d7d | 1064 | __progname = ssh_get_progname(av[0]); |
264dce47 | 1065 | |
fa649821 | 1066 | SSLeay_add_all_algorithms(); |
c35a6dc5 | 1067 | log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
1068 | ||
ce88d9df | 1069 | init_rng(); |
1070 | seed_rng(); | |
a306f2dd | 1071 | |
aa3378df | 1072 | /* we need this for the home * directory. */ |
5260325f | 1073 | pw = getpwuid(getuid()); |
1074 | if (!pw) { | |
1075 | printf("You don't exist, go away!\n"); | |
1076 | exit(1); | |
1077 | } | |
a306f2dd | 1078 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
1079 | perror("gethostname"); | |
1080 | exit(1); | |
1081 | } | |
aa3378df | 1082 | |
c35a6dc5 | 1083 | while ((opt = getopt(ac, av, |
bdffbcdc | 1084 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
5260325f | 1085 | switch (opt) { |
1086 | case 'b': | |
0fe9892f | 1087 | bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr); |
de4feb6b | 1088 | if (errstr) |
1089 | fatal("Bits has bad value %s (%s)", | |
1090 | optarg, errstr); | |
5260325f | 1091 | break; |
bdffbcdc | 1092 | case 'F': |
1093 | find_host = 1; | |
1094 | rr_hostname = optarg; | |
1095 | break; | |
1096 | case 'H': | |
1097 | hash_hosts = 1; | |
1098 | break; | |
1099 | case 'R': | |
1100 | delete_host = 1; | |
1101 | rr_hostname = optarg; | |
1102 | break; | |
5260325f | 1103 | case 'l': |
1104 | print_fingerprint = 1; | |
1105 | break; | |
aaf45d87 | 1106 | case 'B': |
1107 | print_bubblebabble = 1; | |
1108 | break; | |
5260325f | 1109 | case 'p': |
1110 | change_passphrase = 1; | |
1111 | break; | |
5260325f | 1112 | case 'c': |
1113 | change_comment = 1; | |
1114 | break; | |
5260325f | 1115 | case 'f': |
c784ae09 | 1116 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1117 | sizeof(identity_file)) | |
1118 | fatal("Identity filename too long"); | |
5260325f | 1119 | have_identity = 1; |
1120 | break; | |
21289cd0 | 1121 | case 'g': |
1122 | print_generic = 1; | |
1123 | break; | |
5260325f | 1124 | case 'P': |
1125 | identity_passphrase = optarg; | |
1126 | break; | |
5260325f | 1127 | case 'N': |
1128 | identity_new_passphrase = optarg; | |
1129 | break; | |
5260325f | 1130 | case 'C': |
1131 | identity_comment = optarg; | |
1132 | break; | |
5260325f | 1133 | case 'q': |
1134 | quiet = 1; | |
1135 | break; | |
5deceabb | 1136 | case 'e': |
a306f2dd | 1137 | case 'x': |
5deceabb | 1138 | /* export key */ |
a306f2dd | 1139 | convert_to_ssh2 = 1; |
1140 | break; | |
5deceabb | 1141 | case 'i': |
a306f2dd | 1142 | case 'X': |
5deceabb | 1143 | /* import key */ |
a306f2dd | 1144 | convert_from_ssh2 = 1; |
1145 | break; | |
a306f2dd | 1146 | case 'y': |
1147 | print_public = 1; | |
1148 | break; | |
a306f2dd | 1149 | case 'd': |
fa08c86b | 1150 | key_type_name = "dsa"; |
a306f2dd | 1151 | break; |
fa08c86b | 1152 | case 't': |
1153 | key_type_name = optarg; | |
fa08c86b | 1154 | break; |
93a56445 | 1155 | case 'D': |
1156 | download = 1; | |
32596c7b | 1157 | /*FALLTHROUGH*/ |
285d2b15 | 1158 | case 'U': |
93a56445 | 1159 | reader_id = optarg; |
2b30154a | 1160 | break; |
c6fbc95a | 1161 | case 'v': |
1162 | if (log_level == SYSLOG_LEVEL_INFO) | |
1163 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1164 | else { | |
f2107e97 | 1165 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
c6fbc95a | 1166 | log_level < SYSLOG_LEVEL_DEBUG3) |
1167 | log_level++; | |
1168 | } | |
1169 | break; | |
21289cd0 | 1170 | case 'r': |
bdffbcdc | 1171 | rr_hostname = optarg; |
21289cd0 | 1172 | break; |
c35a6dc5 | 1173 | case 'W': |
0fe9892f | 1174 | generator_wanted = (u_int32_t)strtonum(optarg, 1, |
1175 | UINT_MAX, &errstr); | |
c784ae09 | 1176 | if (errstr) |
1177 | fatal("Desired generator has bad value: %s (%s)", | |
1178 | optarg, errstr); | |
c35a6dc5 | 1179 | break; |
1180 | case 'a': | |
0fe9892f | 1181 | trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1182 | if (errstr) |
1183 | fatal("Invalid number of trials: %s (%s)", | |
1184 | optarg, errstr); | |
c35a6dc5 | 1185 | break; |
1186 | case 'M': | |
0fe9892f | 1187 | memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1188 | if (errstr) { |
1189 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1190 | } | |
c35a6dc5 | 1191 | break; |
1192 | case 'G': | |
1193 | do_gen_candidates = 1; | |
c784ae09 | 1194 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1195 | sizeof(out_file)) | |
1196 | fatal("Output filename too long"); | |
c35a6dc5 | 1197 | break; |
1198 | case 'T': | |
1199 | do_screen_candidates = 1; | |
c784ae09 | 1200 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1201 | sizeof(out_file)) | |
1202 | fatal("Output filename too long"); | |
c35a6dc5 | 1203 | break; |
1204 | case 'S': | |
1205 | /* XXX - also compare length against bits */ | |
1206 | if (BN_hex2bn(&start, optarg) == 0) | |
1207 | fatal("Invalid start point."); | |
1208 | break; | |
5260325f | 1209 | case '?': |
1210 | default: | |
1211 | usage(); | |
1212 | } | |
1213 | } | |
c6fbc95a | 1214 | |
1215 | /* reinit */ | |
1216 | log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1); | |
1217 | ||
5260325f | 1218 | if (optind < ac) { |
1219 | printf("Too many arguments.\n"); | |
1220 | usage(); | |
1221 | } | |
1222 | if (change_passphrase && change_comment) { | |
1223 | printf("Can only have one of -p and -c.\n"); | |
1224 | usage(); | |
1225 | } | |
bdffbcdc | 1226 | if (delete_host || hash_hosts || find_host) |
1227 | do_known_hosts(pw, rr_hostname); | |
aaf45d87 | 1228 | if (print_fingerprint || print_bubblebabble) |
5260325f | 1229 | do_fingerprint(pw); |
5260325f | 1230 | if (change_passphrase) |
1231 | do_change_passphrase(pw); | |
633151a3 | 1232 | if (change_comment) |
1233 | do_change_comment(pw); | |
ce88d9df | 1234 | if (convert_to_ssh2) |
1235 | do_convert_to_ssh2(pw); | |
1236 | if (convert_from_ssh2) | |
1237 | do_convert_from_ssh2(pw); | |
a306f2dd | 1238 | if (print_public) |
1239 | do_print_public(pw); | |
bdffbcdc | 1240 | if (rr_hostname != NULL) { |
3eff92ec | 1241 | unsigned int n = 0; |
1242 | ||
1243 | if (have_identity) { | |
1244 | n = do_print_resource_record(pw, | |
1245 | identity_file, rr_hostname); | |
1246 | if (n == 0) { | |
1247 | perror(identity_file); | |
1248 | exit(1); | |
1249 | } | |
1250 | exit(0); | |
1251 | } else { | |
1252 | ||
1253 | n += do_print_resource_record(pw, | |
1254 | _PATH_HOST_RSA_KEY_FILE, rr_hostname); | |
1255 | n += do_print_resource_record(pw, | |
1256 | _PATH_HOST_DSA_KEY_FILE, rr_hostname); | |
1257 | ||
1258 | if (n == 0) | |
1259 | fatal("no keys found."); | |
1260 | exit(0); | |
1261 | } | |
21289cd0 | 1262 | } |
93a56445 | 1263 | if (reader_id != NULL) { |
4f831fd7 | 1264 | #ifdef SMARTCARD |
93a56445 | 1265 | if (download) |
1266 | do_download(pw, reader_id); | |
1267 | else | |
1268 | do_upload(pw, reader_id); | |
3e984472 | 1269 | #else /* SMARTCARD */ |
4f831fd7 | 1270 | fatal("no support for smartcards."); |
3e984472 | 1271 | #endif /* SMARTCARD */ |
93a56445 | 1272 | } |
5260325f | 1273 | |
c35a6dc5 | 1274 | if (do_gen_candidates) { |
1275 | FILE *out = fopen(out_file, "w"); | |
b6453d99 | 1276 | |
c35a6dc5 | 1277 | if (out == NULL) { |
1278 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1279 | out_file, strerror(errno)); | |
1280 | return (1); | |
1281 | } | |
255d3e00 | 1282 | if (bits == 0) |
1283 | bits = DEFAULT_BITS; | |
c35a6dc5 | 1284 | if (gen_candidates(out, memory, bits, start) != 0) |
17318dd6 | 1285 | fatal("modulus candidate generation failed"); |
c35a6dc5 | 1286 | |
1287 | return (0); | |
1288 | } | |
1289 | ||
1290 | if (do_screen_candidates) { | |
1291 | FILE *in; | |
1292 | FILE *out = fopen(out_file, "w"); | |
1293 | ||
1294 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1295 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1296 | fatal("Couldn't open modulus candidate " | |
aff51935 | 1297 | "file \"%s\": %s", identity_file, |
c35a6dc5 | 1298 | strerror(errno)); |
1299 | } | |
1300 | } else | |
1301 | in = stdin; | |
1302 | ||
1303 | if (out == NULL) { | |
1304 | fatal("Couldn't open moduli file \"%s\": %s", | |
1305 | out_file, strerror(errno)); | |
1306 | } | |
1307 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
17318dd6 | 1308 | fatal("modulus screening failed"); |
08d035b6 | 1309 | return (0); |
c35a6dc5 | 1310 | } |
1311 | ||
5260325f | 1312 | arc4random_stir(); |
1313 | ||
882c9d5a | 1314 | if (key_type_name == NULL) |
1315 | key_type_name = "rsa"; | |
1316 | ||
c523303b | 1317 | type = key_type_from_name(key_type_name); |
1318 | if (type == KEY_UNSPEC) { | |
1319 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1320 | exit(1); | |
a306f2dd | 1321 | } |
255d3e00 | 1322 | if (bits == 0) |
1323 | bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; | |
6e94bd72 | 1324 | if (type == KEY_DSA && bits != 1024) |
1325 | fatal("DSA keys must be 1024 bits"); | |
60dc0294 | 1326 | if (!quiet) |
1327 | printf("Generating public/private %s key pair.\n", key_type_name); | |
fa08c86b | 1328 | private = key_generate(type, bits); |
1329 | if (private == NULL) { | |
1330 | fprintf(stderr, "key_generate failed"); | |
1331 | exit(1); | |
1332 | } | |
1333 | public = key_from_private(private); | |
5260325f | 1334 | |
1335 | if (!have_identity) | |
1336 | ask_filename(pw, "Enter file in which to save the key"); | |
1337 | ||
7b9b0103 | 1338 | /* Create ~/.ssh directory if it doesn't already exist. */ |
42f11eb2 | 1339 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 1340 | if (strstr(identity_file, dotsshdir) != NULL && |
1341 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 1342 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 1343 | error("Could not create directory '%s'.", dotsshdir); |
1344 | else if (!quiet) | |
1345 | printf("Created directory '%s'.\n", dotsshdir); | |
1346 | } | |
1347 | /* If the file already exists, ask the user to confirm. */ | |
1348 | if (stat(identity_file, &st) >= 0) { | |
1349 | char yesno[3]; | |
1350 | printf("%s already exists.\n", identity_file); | |
1351 | printf("Overwrite (y/n)? "); | |
1352 | fflush(stdout); | |
1353 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1354 | exit(1); | |
1355 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1356 | exit(1); | |
1357 | } | |
1358 | /* Ask for a passphrase (twice). */ | |
1359 | if (identity_passphrase) | |
1360 | passphrase1 = xstrdup(identity_passphrase); | |
1361 | else if (identity_new_passphrase) | |
1362 | passphrase1 = xstrdup(identity_new_passphrase); | |
1363 | else { | |
1364 | passphrase_again: | |
1365 | passphrase1 = | |
1843a425 | 1366 | read_passphrase("Enter passphrase (empty for no " |
1367 | "passphrase): ", RP_ALLOW_STDIN); | |
1368 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1369 | RP_ALLOW_STDIN); | |
5260325f | 1370 | if (strcmp(passphrase1, passphrase2) != 0) { |
1843a425 | 1371 | /* |
1372 | * The passphrases do not match. Clear them and | |
1373 | * retry. | |
1374 | */ | |
5260325f | 1375 | memset(passphrase1, 0, strlen(passphrase1)); |
1376 | memset(passphrase2, 0, strlen(passphrase2)); | |
1377 | xfree(passphrase1); | |
1378 | xfree(passphrase2); | |
1379 | printf("Passphrases do not match. Try again.\n"); | |
1380 | goto passphrase_again; | |
1381 | } | |
1382 | /* Clear the other copy of the passphrase. */ | |
1383 | memset(passphrase2, 0, strlen(passphrase2)); | |
1384 | xfree(passphrase2); | |
1385 | } | |
1386 | ||
5260325f | 1387 | if (identity_comment) { |
1388 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1389 | } else { | |
6ae2364d | 1390 | /* Create default commend field for the passphrase. */ |
5260325f | 1391 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
1392 | } | |
1393 | ||
1394 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 1395 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 1396 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 1397 | memset(passphrase1, 0, strlen(passphrase1)); |
1398 | xfree(passphrase1); | |
1399 | exit(1); | |
1400 | } | |
1401 | /* Clear the passphrase. */ | |
1402 | memset(passphrase1, 0, strlen(passphrase1)); | |
1403 | xfree(passphrase1); | |
1404 | ||
1405 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 1406 | key_free(private); |
5260325f | 1407 | arc4random_stir(); |
1408 | ||
1409 | if (!quiet) | |
1410 | printf("Your identification has been saved in %s.\n", identity_file); | |
1411 | ||
5260325f | 1412 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1413 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1414 | if (fd == -1) { | |
5260325f | 1415 | printf("Could not save your public key in %s\n", identity_file); |
1416 | exit(1); | |
1417 | } | |
1c9a907f | 1418 | f = fdopen(fd, "w"); |
1419 | if (f == NULL) { | |
1420 | printf("fdopen %s failed", identity_file); | |
1421 | exit(1); | |
1422 | } | |
a306f2dd | 1423 | if (!key_write(public, f)) |
1424 | fprintf(stderr, "write key failed"); | |
1425 | fprintf(f, " %s\n", comment); | |
5260325f | 1426 | fclose(f); |
1427 | ||
1428 | if (!quiet) { | |
22138a36 | 1429 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 1430 | printf("Your public key has been saved in %s.\n", |
1431 | identity_file); | |
5260325f | 1432 | printf("The key fingerprint is:\n"); |
22138a36 | 1433 | printf("%s %s\n", fp, comment); |
1434 | xfree(fp); | |
8efc0c15 | 1435 | } |
a306f2dd | 1436 | |
1437 | key_free(public); | |
5260325f | 1438 | exit(0); |
8efc0c15 | 1439 | } |