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Commit | Line | Data |
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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
3 | * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5260325f | 5 | * Identity and host key generation and maintenance. |
bcbf86ec | 6 | * |
7 | * As far as I am concerned, the code I have written for this software | |
8 | * can be used freely for any purpose. Any derived versions of this | |
9 | * software must be clearly marked as such, and if the derived work is | |
10 | * incompatible with the protocol description in the RFC file, it must be | |
11 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 12 | */ |
8efc0c15 | 13 | |
14 | #include "includes.h" | |
15b81af3 | 15 | RCSID("$OpenBSD: ssh-keygen.c,v 1.137 2006/03/13 08:43:16 dtucker Exp $"); |
4095f623 | 16 | |
17 | #include <sys/types.h> | |
18 | #include <sys/stat.h> | |
8efc0c15 | 19 | |
a306f2dd | 20 | #include <openssl/evp.h> |
21 | #include <openssl/pem.h> | |
a306f2dd | 22 | |
8efc0c15 | 23 | #include "xmalloc.h" |
a306f2dd | 24 | #include "key.h" |
457fc0c6 | 25 | #include "rsa.h" |
a306f2dd | 26 | #include "authfile.h" |
27 | #include "uuencode.h" | |
94ec8c6b | 28 | #include "buffer.h" |
29 | #include "bufaux.h" | |
42f11eb2 | 30 | #include "pathnames.h" |
31 | #include "log.h" | |
58ae9cb8 | 32 | #include "misc.h" |
bdffbcdc | 33 | #include "match.h" |
34 | #include "hostfile.h" | |
94ec8c6b | 35 | |
93a56445 | 36 | #ifdef SMARTCARD |
93a56445 | 37 | #include "scard.h" |
dd2495cb | 38 | #endif |
02159d9b | 39 | #include "dns.h" |
2b30154a | 40 | |
255d3e00 | 41 | /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ |
42 | #define DEFAULT_BITS 2048 | |
43 | #define DEFAULT_BITS_DSA 1024 | |
44 | u_int32_t bits = 0; | |
8efc0c15 | 45 | |
aa3378df | 46 | /* |
47 | * Flag indicating that we just want to change the passphrase. This can be | |
48 | * set on the command line. | |
49 | */ | |
8efc0c15 | 50 | int change_passphrase = 0; |
51 | ||
aa3378df | 52 | /* |
53 | * Flag indicating that we just want to change the comment. This can be set | |
54 | * on the command line. | |
55 | */ | |
8efc0c15 | 56 | int change_comment = 0; |
57 | ||
58 | int quiet = 0; | |
59 | ||
bdffbcdc | 60 | /* Flag indicating that we want to hash a known_hosts file */ |
61 | int hash_hosts = 0; | |
62 | /* Flag indicating that we want lookup a host in known_hosts file */ | |
63 | int find_host = 0; | |
64 | /* Flag indicating that we want to delete a host from a known_hosts file */ | |
65 | int delete_host = 0; | |
66 | ||
f095fcc7 | 67 | /* Flag indicating that we just want to see the key fingerprint */ |
68 | int print_fingerprint = 0; | |
aaf45d87 | 69 | int print_bubblebabble = 0; |
f095fcc7 | 70 | |
5ad13cd7 | 71 | /* The identity file name, given on the command line or entered by the user. */ |
72 | char identity_file[1024]; | |
73 | int have_identity = 0; | |
8efc0c15 | 74 | |
75 | /* This is set to the passphrase if given on the command line. */ | |
76 | char *identity_passphrase = NULL; | |
77 | ||
78 | /* This is set to the new passphrase if given on the command line. */ | |
79 | char *identity_new_passphrase = NULL; | |
80 | ||
81 | /* This is set to the new comment if given on the command line. */ | |
82 | char *identity_comment = NULL; | |
83 | ||
a306f2dd | 84 | /* Dump public key file in format used by real and the original SSH 2 */ |
85 | int convert_to_ssh2 = 0; | |
86 | int convert_from_ssh2 = 0; | |
87 | int print_public = 0; | |
21289cd0 | 88 | int print_generic = 0; |
fa08c86b | 89 | |
3dc93cd8 | 90 | char *key_type_name = NULL; |
a306f2dd | 91 | |
5ad13cd7 | 92 | /* argv0 */ |
93 | extern char *__progname; | |
8efc0c15 | 94 | |
a306f2dd | 95 | char hostname[MAXHOSTNAMELEN]; |
96 | ||
20eea1d7 | 97 | /* moduli.c */ |
c784ae09 | 98 | int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
20eea1d7 | 99 | int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
100 | ||
396c147e | 101 | static void |
5ad13cd7 | 102 | ask_filename(struct passwd *pw, const char *prompt) |
8efc0c15 | 103 | { |
5260325f | 104 | char buf[1024]; |
c523303b | 105 | char *name = NULL; |
106 | ||
8d22d775 | 107 | if (key_type_name == NULL) |
42f11eb2 | 108 | name = _PATH_SSH_CLIENT_ID_RSA; |
8d22d775 | 109 | else |
110 | switch (key_type_from_name(key_type_name)) { | |
111 | case KEY_RSA1: | |
112 | name = _PATH_SSH_CLIENT_IDENTITY; | |
113 | break; | |
114 | case KEY_DSA: | |
115 | name = _PATH_SSH_CLIENT_ID_DSA; | |
116 | break; | |
117 | case KEY_RSA: | |
118 | name = _PATH_SSH_CLIENT_ID_RSA; | |
119 | break; | |
120 | default: | |
121 | fprintf(stderr, "bad key type"); | |
122 | exit(1); | |
123 | break; | |
124 | } | |
125 | ||
c523303b | 126 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
8d88011e | 127 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
5260325f | 128 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
129 | exit(1); | |
130 | if (strchr(buf, '\n')) | |
131 | *strchr(buf, '\n') = 0; | |
132 | if (strcmp(buf, "") != 0) | |
133 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
134 | have_identity = 1; | |
f095fcc7 | 135 | } |
8efc0c15 | 136 | |
396c147e | 137 | static Key * |
abe0fb9f | 138 | load_identity(char *filename) |
a306f2dd | 139 | { |
aeaa3d9e | 140 | char *pass; |
141 | Key *prv; | |
142 | ||
cd332296 | 143 | prv = key_load_private(filename, "", NULL); |
aeaa3d9e | 144 | if (prv == NULL) { |
abe0fb9f | 145 | if (identity_passphrase) |
146 | pass = xstrdup(identity_passphrase); | |
147 | else | |
1843a425 | 148 | pass = read_passphrase("Enter passphrase: ", |
149 | RP_ALLOW_STDIN); | |
aeaa3d9e | 150 | prv = key_load_private(filename, pass, NULL); |
a306f2dd | 151 | memset(pass, 0, strlen(pass)); |
152 | xfree(pass); | |
153 | } | |
aeaa3d9e | 154 | return prv; |
a306f2dd | 155 | } |
156 | ||
94ec8c6b | 157 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
7203d6bb | 158 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
94ec8c6b | 159 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
2b87da3b | 160 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 161 | |
396c147e | 162 | static void |
a306f2dd | 163 | do_convert_to_ssh2(struct passwd *pw) |
164 | { | |
b587c165 | 165 | Key *k; |
21b30f38 | 166 | u_int len; |
1e3b8b07 | 167 | u_char *blob; |
a306f2dd | 168 | struct stat st; |
169 | ||
170 | if (!have_identity) | |
171 | ask_filename(pw, "Enter file in which the key is"); | |
172 | if (stat(identity_file, &st) < 0) { | |
173 | perror(identity_file); | |
174 | exit(1); | |
175 | } | |
b587c165 | 176 | if ((k = key_load_public(identity_file, NULL)) == NULL) { |
abe0fb9f | 177 | if ((k = load_identity(identity_file)) == NULL) { |
b587c165 | 178 | fprintf(stderr, "load failed\n"); |
179 | exit(1); | |
180 | } | |
a306f2dd | 181 | } |
3566c73c | 182 | if (k->type == KEY_RSA1) { |
183 | fprintf(stderr, "version 1 keys are not supported\n"); | |
184 | exit(1); | |
185 | } | |
f7436b8c | 186 | if (key_to_blob(k, &blob, &len) <= 0) { |
187 | fprintf(stderr, "key_to_blob failed\n"); | |
188 | exit(1); | |
189 | } | |
94ec8c6b | 190 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 191 | fprintf(stdout, |
512df038 | 192 | "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", |
b587c165 | 193 | key_size(k), key_type(k), |
a306f2dd | 194 | pw->pw_name, hostname); |
195 | dump_base64(stdout, blob, len); | |
94ec8c6b | 196 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
b587c165 | 197 | key_free(k); |
a306f2dd | 198 | xfree(blob); |
199 | exit(0); | |
200 | } | |
201 | ||
396c147e | 202 | static void |
94ec8c6b | 203 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
204 | { | |
ca75d7de | 205 | u_int bignum_bits = buffer_get_int(b); |
206 | u_int bytes = (bignum_bits + 7) / 8; | |
457fc0c6 | 207 | |
94ec8c6b | 208 | if (buffer_len(b) < bytes) |
457fc0c6 | 209 | fatal("buffer_get_bignum_bits: input buffer too small: " |
210 | "need %d have %d", bytes, buffer_len(b)); | |
20905a8e | 211 | BN_bin2bn(buffer_ptr(b), bytes, value); |
94ec8c6b | 212 | buffer_consume(b, bytes); |
213 | } | |
214 | ||
396c147e | 215 | static Key * |
c66f9d0e | 216 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
94ec8c6b | 217 | { |
218 | Buffer b; | |
94ec8c6b | 219 | Key *key = NULL; |
a599bd06 | 220 | char *type, *cipher; |
d3260e12 | 221 | u_char *sig, data[] = "abcde12345"; |
2e0becb6 | 222 | int magic, rlen, ktype, i1, i2, i3, i4; |
a599bd06 | 223 | u_int slen; |
2e0becb6 | 224 | u_long e; |
94ec8c6b | 225 | |
226 | buffer_init(&b); | |
227 | buffer_append(&b, blob, blen); | |
228 | ||
229 | magic = buffer_get_int(&b); | |
230 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { | |
231 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
232 | buffer_free(&b); | |
233 | return NULL; | |
234 | } | |
2e0becb6 | 235 | i1 = buffer_get_int(&b); |
94ec8c6b | 236 | type = buffer_get_string(&b, NULL); |
237 | cipher = buffer_get_string(&b, NULL); | |
2e0becb6 | 238 | i2 = buffer_get_int(&b); |
239 | i3 = buffer_get_int(&b); | |
240 | i4 = buffer_get_int(&b); | |
241 | debug("ignore (%d %d %d %d)", i1,i2,i3,i4); | |
94ec8c6b | 242 | if (strcmp(cipher, "none") != 0) { |
243 | error("unsupported cipher %s", cipher); | |
244 | xfree(cipher); | |
245 | buffer_free(&b); | |
457fc0c6 | 246 | xfree(type); |
94ec8c6b | 247 | return NULL; |
248 | } | |
249 | xfree(cipher); | |
250 | ||
457fc0c6 | 251 | if (strstr(type, "dsa")) { |
252 | ktype = KEY_DSA; | |
253 | } else if (strstr(type, "rsa")) { | |
254 | ktype = KEY_RSA; | |
255 | } else { | |
3c460ede | 256 | buffer_free(&b); |
457fc0c6 | 257 | xfree(type); |
94ec8c6b | 258 | return NULL; |
259 | } | |
457fc0c6 | 260 | key = key_new_private(ktype); |
261 | xfree(type); | |
262 | ||
263 | switch (key->type) { | |
264 | case KEY_DSA: | |
265 | buffer_get_bignum_bits(&b, key->dsa->p); | |
266 | buffer_get_bignum_bits(&b, key->dsa->g); | |
267 | buffer_get_bignum_bits(&b, key->dsa->q); | |
268 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
269 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
270 | break; | |
271 | case KEY_RSA: | |
2e0becb6 | 272 | e = buffer_get_char(&b); |
273 | debug("e %lx", e); | |
274 | if (e < 30) { | |
275 | e <<= 8; | |
276 | e += buffer_get_char(&b); | |
277 | debug("e %lx", e); | |
278 | e <<= 8; | |
279 | e += buffer_get_char(&b); | |
280 | debug("e %lx", e); | |
281 | } | |
282 | if (!BN_set_word(key->rsa->e, e)) { | |
457fc0c6 | 283 | buffer_free(&b); |
284 | key_free(key); | |
285 | return NULL; | |
286 | } | |
287 | buffer_get_bignum_bits(&b, key->rsa->d); | |
288 | buffer_get_bignum_bits(&b, key->rsa->n); | |
289 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
290 | buffer_get_bignum_bits(&b, key->rsa->q); | |
291 | buffer_get_bignum_bits(&b, key->rsa->p); | |
2b63e803 | 292 | rsa_generate_additional_parameters(key->rsa); |
457fc0c6 | 293 | break; |
294 | } | |
94ec8c6b | 295 | rlen = buffer_len(&b); |
6aacefa7 | 296 | if (rlen != 0) |
457fc0c6 | 297 | error("do_convert_private_ssh2_from_blob: " |
298 | "remaining bytes in key blob %d", rlen); | |
94ec8c6b | 299 | buffer_free(&b); |
a599bd06 | 300 | |
301 | /* try the key */ | |
302 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
303 | key_verify(key, sig, slen, data, sizeof(data)); | |
304 | xfree(sig); | |
94ec8c6b | 305 | return key; |
306 | } | |
307 | ||
15b81af3 | 308 | static int |
309 | get_line(FILE *fp, char *line, size_t len) | |
310 | { | |
311 | int c; | |
312 | size_t pos = 0; | |
313 | ||
314 | line[0] = '\0'; | |
315 | while ((c = fgetc(fp)) != EOF) { | |
316 | if (pos >= len - 1) { | |
317 | fprintf(stderr, "input line too long.\n"); | |
318 | exit(1); | |
319 | } | |
320 | switch(c) { | |
321 | case '\r': | |
322 | c = fgetc(fp); | |
323 | if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { | |
324 | fprintf(stderr, "unget: %s\n", strerror(errno)); | |
325 | exit(1); | |
326 | } | |
327 | return pos; | |
328 | case '\n': | |
329 | return pos; | |
330 | } | |
331 | line[pos++] = c; | |
332 | line[pos] = '\0'; | |
333 | } | |
334 | return pos; | |
335 | } | |
336 | ||
396c147e | 337 | static void |
a306f2dd | 338 | do_convert_from_ssh2(struct passwd *pw) |
339 | { | |
340 | Key *k; | |
341 | int blen; | |
783dbbdc | 342 | u_int len; |
15b81af3 | 343 | char line[1024]; |
cf54363d | 344 | u_char blob[8096]; |
a306f2dd | 345 | char encoded[8096]; |
346 | struct stat st; | |
94ec8c6b | 347 | int escaped = 0, private = 0, ok; |
a306f2dd | 348 | FILE *fp; |
349 | ||
350 | if (!have_identity) | |
351 | ask_filename(pw, "Enter file in which the key is"); | |
352 | if (stat(identity_file, &st) < 0) { | |
353 | perror(identity_file); | |
354 | exit(1); | |
355 | } | |
356 | fp = fopen(identity_file, "r"); | |
357 | if (fp == NULL) { | |
358 | perror(identity_file); | |
359 | exit(1); | |
360 | } | |
361 | encoded[0] = '\0'; | |
15b81af3 | 362 | while ((blen = get_line(fp, line, sizeof(line))) != -1) { |
363 | if (line[blen - 1] == '\\') | |
d0c832f3 | 364 | escaped++; |
a306f2dd | 365 | if (strncmp(line, "----", 4) == 0 || |
366 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 367 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
368 | private = 1; | |
a599bd06 | 369 | if (strstr(line, " END ") != NULL) { |
370 | break; | |
371 | } | |
012bc0e1 | 372 | /* fprintf(stderr, "ignore: %s", line); */ |
a306f2dd | 373 | continue; |
374 | } | |
d0c832f3 | 375 | if (escaped) { |
376 | escaped--; | |
012bc0e1 | 377 | /* fprintf(stderr, "escaped: %s", line); */ |
d0c832f3 | 378 | continue; |
a306f2dd | 379 | } |
a306f2dd | 380 | strlcat(encoded, line, sizeof(encoded)); |
381 | } | |
783dbbdc | 382 | len = strlen(encoded); |
383 | if (((len % 4) == 3) && | |
384 | (encoded[len-1] == '=') && | |
385 | (encoded[len-2] == '=') && | |
386 | (encoded[len-3] == '=')) | |
387 | encoded[len-3] = '\0'; | |
e6207598 | 388 | blen = uudecode(encoded, blob, sizeof(blob)); |
a306f2dd | 389 | if (blen < 0) { |
390 | fprintf(stderr, "uudecode failed.\n"); | |
391 | exit(1); | |
392 | } | |
94ec8c6b | 393 | k = private ? |
394 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 395 | key_from_blob(blob, blen); |
94ec8c6b | 396 | if (k == NULL) { |
397 | fprintf(stderr, "decode blob failed.\n"); | |
398 | exit(1); | |
399 | } | |
400 | ok = private ? | |
457fc0c6 | 401 | (k->type == KEY_DSA ? |
402 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
403 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
94ec8c6b | 404 | key_write(k, stdout); |
405 | if (!ok) { | |
406 | fprintf(stderr, "key write failed"); | |
407 | exit(1); | |
408 | } | |
a306f2dd | 409 | key_free(k); |
4ccb828d | 410 | if (!private) |
411 | fprintf(stdout, "\n"); | |
a306f2dd | 412 | fclose(fp); |
413 | exit(0); | |
414 | } | |
415 | ||
396c147e | 416 | static void |
a306f2dd | 417 | do_print_public(struct passwd *pw) |
418 | { | |
aeaa3d9e | 419 | Key *prv; |
a306f2dd | 420 | struct stat st; |
421 | ||
422 | if (!have_identity) | |
423 | ask_filename(pw, "Enter file in which the key is"); | |
424 | if (stat(identity_file, &st) < 0) { | |
425 | perror(identity_file); | |
426 | exit(1); | |
427 | } | |
abe0fb9f | 428 | prv = load_identity(identity_file); |
aeaa3d9e | 429 | if (prv == NULL) { |
a306f2dd | 430 | fprintf(stderr, "load failed\n"); |
431 | exit(1); | |
432 | } | |
aeaa3d9e | 433 | if (!key_write(prv, stdout)) |
a306f2dd | 434 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 435 | key_free(prv); |
a306f2dd | 436 | fprintf(stdout, "\n"); |
437 | exit(0); | |
438 | } | |
439 | ||
4f831fd7 | 440 | #ifdef SMARTCARD |
2b30154a | 441 | static void |
93a56445 | 442 | do_upload(struct passwd *pw, const char *sc_reader_id) |
2b30154a | 443 | { |
2b30154a | 444 | Key *prv = NULL; |
445 | struct stat st; | |
b9f62352 | 446 | int ret; |
447 | ||
2b30154a | 448 | if (!have_identity) |
449 | ask_filename(pw, "Enter file in which the key is"); | |
450 | if (stat(identity_file, &st) < 0) { | |
451 | perror(identity_file); | |
b9f62352 | 452 | exit(1); |
2b30154a | 453 | } |
454 | prv = load_identity(identity_file); | |
455 | if (prv == NULL) { | |
456 | error("load failed"); | |
b9f62352 | 457 | exit(1); |
49ccba9c | 458 | } |
b9f62352 | 459 | ret = sc_put_key(prv, sc_reader_id); |
460 | key_free(prv); | |
461 | if (ret < 0) | |
462 | exit(1); | |
bbe88b6d | 463 | logit("loading key done"); |
b9f62352 | 464 | exit(0); |
2b30154a | 465 | } |
93a56445 | 466 | |
467 | static void | |
468 | do_download(struct passwd *pw, const char *sc_reader_id) | |
469 | { | |
0659cace | 470 | Key **keys = NULL; |
471 | int i; | |
93a56445 | 472 | |
0659cace | 473 | keys = sc_get_keys(sc_reader_id, NULL); |
474 | if (keys == NULL) | |
93a56445 | 475 | fatal("cannot read public key from smartcard"); |
0659cace | 476 | for (i = 0; keys[i]; i++) { |
477 | key_write(keys[i], stdout); | |
478 | key_free(keys[i]); | |
479 | fprintf(stdout, "\n"); | |
480 | } | |
481 | xfree(keys); | |
93a56445 | 482 | exit(0); |
483 | } | |
3e984472 | 484 | #endif /* SMARTCARD */ |
2b30154a | 485 | |
396c147e | 486 | static void |
f095fcc7 | 487 | do_fingerprint(struct passwd *pw) |
488 | { | |
c8d54615 | 489 | FILE *f; |
a306f2dd | 490 | Key *public; |
aaf45d87 | 491 | char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
17a3011c | 492 | int i, skip = 0, num = 1, invalid = 1; |
493 | enum fp_rep rep; | |
494 | enum fp_type fptype; | |
5260325f | 495 | struct stat st; |
496 | ||
aeaa3d9e | 497 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
498 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 499 | |
5260325f | 500 | if (!have_identity) |
501 | ask_filename(pw, "Enter file in which the key is"); | |
502 | if (stat(identity_file, &st) < 0) { | |
503 | perror(identity_file); | |
504 | exit(1); | |
505 | } | |
aeaa3d9e | 506 | public = key_load_public(identity_file, &comment); |
507 | if (public != NULL) { | |
508 | fp = key_fingerprint(public, fptype, rep); | |
512df038 | 509 | printf("%u %s %s\n", key_size(public), fp, comment); |
a306f2dd | 510 | key_free(public); |
fa08c86b | 511 | xfree(comment); |
aaf45d87 | 512 | xfree(fp); |
c8d54615 | 513 | exit(0); |
514 | } | |
aeaa3d9e | 515 | if (comment) |
516 | xfree(comment); | |
c8d54615 | 517 | |
518 | f = fopen(identity_file, "r"); | |
519 | if (f != NULL) { | |
c8d54615 | 520 | while (fgets(line, sizeof(line), f)) { |
521 | i = strlen(line) - 1; | |
522 | if (line[i] != '\n') { | |
523 | error("line %d too long: %.40s...", num, line); | |
524 | skip = 1; | |
525 | continue; | |
526 | } | |
527 | num++; | |
528 | if (skip) { | |
529 | skip = 0; | |
530 | continue; | |
531 | } | |
532 | line[i] = '\0'; | |
533 | ||
534 | /* Skip leading whitespace, empty and comment lines. */ | |
535 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
536 | ; | |
537 | if (!*cp || *cp == '\n' || *cp == '#') | |
538 | continue ; | |
539 | i = strtol(cp, &ep, 10); | |
540 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
541 | int quoted = 0; | |
542 | comment = cp; | |
512df038 | 543 | for (; *cp && (quoted || (*cp != ' ' && |
544 | *cp != '\t')); cp++) { | |
c8d54615 | 545 | if (*cp == '\\' && cp[1] == '"') |
546 | cp++; /* Skip both */ | |
547 | else if (*cp == '"') | |
548 | quoted = !quoted; | |
549 | } | |
550 | if (!*cp) | |
551 | continue; | |
552 | *cp++ = '\0'; | |
553 | } | |
554 | ep = cp; | |
efcae5b1 | 555 | public = key_new(KEY_RSA1); |
556 | if (key_read(public, &cp) != 1) { | |
557 | cp = ep; | |
558 | key_free(public); | |
559 | public = key_new(KEY_UNSPEC); | |
560 | if (key_read(public, &cp) != 1) { | |
561 | key_free(public); | |
562 | continue; | |
563 | } | |
5260325f | 564 | } |
efcae5b1 | 565 | comment = *cp ? cp : comment; |
aeaa3d9e | 566 | fp = key_fingerprint(public, fptype, rep); |
512df038 | 567 | printf("%u %s %s\n", key_size(public), fp, |
efcae5b1 | 568 | comment ? comment : "no comment"); |
aaf45d87 | 569 | xfree(fp); |
aeaa3d9e | 570 | key_free(public); |
efcae5b1 | 571 | invalid = 0; |
5260325f | 572 | } |
c8d54615 | 573 | fclose(f); |
574 | } | |
575 | if (invalid) { | |
f564d016 | 576 | printf("%s is not a public key file.\n", identity_file); |
c8d54615 | 577 | exit(1); |
5260325f | 578 | } |
5260325f | 579 | exit(0); |
f095fcc7 | 580 | } |
581 | ||
bdffbcdc | 582 | static void |
583 | print_host(FILE *f, char *name, Key *public, int hash) | |
584 | { | |
585 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
586 | fatal("hash_host failed"); | |
587 | fprintf(f, "%s ", name); | |
588 | if (!key_write(public, f)) | |
589 | fatal("key_write failed"); | |
590 | fprintf(f, "\n"); | |
591 | } | |
592 | ||
593 | static void | |
594 | do_known_hosts(struct passwd *pw, const char *name) | |
595 | { | |
596 | FILE *in, *out = stdout; | |
597 | Key *public; | |
598 | char *cp, *cp2, *kp, *kp2; | |
599 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
600 | int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; | |
601 | ||
602 | if (!have_identity) { | |
603 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
604 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
605 | sizeof(identity_file)) | |
606 | fatal("Specified known hosts path too long"); | |
607 | xfree(cp); | |
608 | have_identity = 1; | |
609 | } | |
610 | if ((in = fopen(identity_file, "r")) == NULL) | |
611 | fatal("fopen: %s", strerror(errno)); | |
612 | ||
613 | /* | |
614 | * Find hosts goes to stdout, hash and deletions happen in-place | |
615 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
616 | */ | |
617 | if (!find_host && (hash_hosts || delete_host)) { | |
618 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
619 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
620 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
621 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
622 | fatal("known_hosts path too long"); | |
623 | umask(077); | |
624 | if ((c = mkstemp(tmp)) == -1) | |
625 | fatal("mkstemp: %s", strerror(errno)); | |
626 | if ((out = fdopen(c, "w")) == NULL) { | |
627 | c = errno; | |
628 | unlink(tmp); | |
629 | fatal("fdopen: %s", strerror(c)); | |
630 | } | |
631 | inplace = 1; | |
632 | } | |
633 | ||
634 | while (fgets(line, sizeof(line), in)) { | |
635 | num++; | |
636 | i = strlen(line) - 1; | |
637 | if (line[i] != '\n') { | |
638 | error("line %d too long: %.40s...", num, line); | |
639 | skip = 1; | |
640 | invalid = 1; | |
641 | continue; | |
642 | } | |
643 | if (skip) { | |
644 | skip = 0; | |
645 | continue; | |
646 | } | |
647 | line[i] = '\0'; | |
648 | ||
649 | /* Skip leading whitespace, empty and comment lines. */ | |
650 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
651 | ; | |
652 | if (!*cp || *cp == '\n' || *cp == '#') { | |
653 | if (inplace) | |
654 | fprintf(out, "%s\n", cp); | |
655 | continue; | |
656 | } | |
657 | /* Find the end of the host name portion. */ | |
658 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
659 | ; | |
660 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
661 | error("line %d missing key: %.40s...", | |
662 | num, line); | |
663 | invalid = 1; | |
664 | continue; | |
665 | } | |
666 | *kp++ = '\0'; | |
667 | kp2 = kp; | |
668 | ||
669 | public = key_new(KEY_RSA1); | |
670 | if (key_read(public, &kp) != 1) { | |
671 | kp = kp2; | |
672 | key_free(public); | |
673 | public = key_new(KEY_UNSPEC); | |
674 | if (key_read(public, &kp) != 1) { | |
675 | error("line %d invalid key: %.40s...", | |
676 | num, line); | |
677 | key_free(public); | |
678 | invalid = 1; | |
679 | continue; | |
680 | } | |
681 | } | |
682 | ||
683 | if (*cp == HASH_DELIM) { | |
684 | if (find_host || delete_host) { | |
685 | cp2 = host_hash(name, cp, strlen(cp)); | |
686 | if (cp2 == NULL) { | |
687 | error("line %d: invalid hashed " | |
688 | "name: %.64s...", num, line); | |
689 | invalid = 1; | |
690 | continue; | |
691 | } | |
692 | c = (strcmp(cp2, cp) == 0); | |
693 | if (find_host && c) { | |
694 | printf("# Host %s found: " | |
695 | "line %d type %s\n", name, | |
696 | num, key_type(public)); | |
697 | print_host(out, cp, public, 0); | |
698 | } | |
699 | if (delete_host && !c) | |
700 | print_host(out, cp, public, 0); | |
701 | } else if (hash_hosts) | |
702 | print_host(out, cp, public, 0); | |
703 | } else { | |
704 | if (find_host || delete_host) { | |
705 | c = (match_hostname(name, cp, | |
706 | strlen(cp)) == 1); | |
707 | if (find_host && c) { | |
708 | printf("# Host %s found: " | |
709 | "line %d type %s\n", name, | |
710 | num, key_type(public)); | |
711 | print_host(out, cp, public, hash_hosts); | |
712 | } | |
713 | if (delete_host && !c) | |
714 | print_host(out, cp, public, 0); | |
715 | } else if (hash_hosts) { | |
f8cc7664 | 716 | for (cp2 = strsep(&cp, ","); |
bdffbcdc | 717 | cp2 != NULL && *cp2 != '\0'; |
bc7119ba | 718 | cp2 = strsep(&cp, ",")) { |
719 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
720 | fprintf(stderr, "Warning: " | |
721 | "ignoring host name with " | |
722 | "metacharacters: %.64s\n", | |
723 | cp2); | |
724 | else | |
725 | print_host(out, cp2, public, 1); | |
726 | } | |
bdffbcdc | 727 | has_unhashed = 1; |
728 | } | |
729 | } | |
730 | key_free(public); | |
731 | } | |
732 | fclose(in); | |
733 | ||
734 | if (invalid) { | |
735 | fprintf(stderr, "%s is not a valid known_host file.\n", | |
736 | identity_file); | |
737 | if (inplace) { | |
738 | fprintf(stderr, "Not replacing existing known_hosts " | |
604dac32 | 739 | "file because of errors\n"); |
bdffbcdc | 740 | fclose(out); |
741 | unlink(tmp); | |
742 | } | |
743 | exit(1); | |
744 | } | |
745 | ||
746 | if (inplace) { | |
747 | fclose(out); | |
748 | ||
749 | /* Backup existing file */ | |
750 | if (unlink(old) == -1 && errno != ENOENT) | |
751 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
752 | if (link(identity_file, old) == -1) | |
753 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
754 | strerror(errno)); | |
755 | /* Move new one into place */ | |
756 | if (rename(tmp, identity_file) == -1) { | |
757 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
758 | strerror(errno)); | |
759 | unlink(tmp); | |
760 | unlink(old); | |
761 | exit(1); | |
762 | } | |
763 | ||
764 | fprintf(stderr, "%s updated.\n", identity_file); | |
765 | fprintf(stderr, "Original contents retained as %s\n", old); | |
766 | if (has_unhashed) { | |
767 | fprintf(stderr, "WARNING: %s contains unhashed " | |
768 | "entries\n", old); | |
769 | fprintf(stderr, "Delete this file to ensure privacy " | |
4e2e5cfd | 770 | "of hostnames\n"); |
bdffbcdc | 771 | } |
772 | } | |
773 | ||
774 | exit(0); | |
775 | } | |
776 | ||
5260325f | 777 | /* |
778 | * Perform changing a passphrase. The argument is the passwd structure | |
779 | * for the current user. | |
780 | */ | |
396c147e | 781 | static void |
f095fcc7 | 782 | do_change_passphrase(struct passwd *pw) |
783 | { | |
5260325f | 784 | char *comment; |
785 | char *old_passphrase, *passphrase1, *passphrase2; | |
786 | struct stat st; | |
a306f2dd | 787 | Key *private; |
5260325f | 788 | |
789 | if (!have_identity) | |
790 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 791 | if (stat(identity_file, &st) < 0) { |
792 | perror(identity_file); | |
793 | exit(1); | |
794 | } | |
5260325f | 795 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 796 | private = key_load_private(identity_file, "", &comment); |
797 | if (private == NULL) { | |
5260325f | 798 | if (identity_passphrase) |
799 | old_passphrase = xstrdup(identity_passphrase); | |
800 | else | |
1843a425 | 801 | old_passphrase = |
802 | read_passphrase("Enter old passphrase: ", | |
803 | RP_ALLOW_STDIN); | |
804 | private = key_load_private(identity_file, old_passphrase, | |
805 | &comment); | |
aeaa3d9e | 806 | memset(old_passphrase, 0, strlen(old_passphrase)); |
807 | xfree(old_passphrase); | |
808 | if (private == NULL) { | |
5260325f | 809 | printf("Bad passphrase.\n"); |
810 | exit(1); | |
811 | } | |
5260325f | 812 | } |
813 | printf("Key has comment '%s'\n", comment); | |
814 | ||
815 | /* Ask the new passphrase (twice). */ | |
816 | if (identity_new_passphrase) { | |
817 | passphrase1 = xstrdup(identity_new_passphrase); | |
818 | passphrase2 = NULL; | |
819 | } else { | |
820 | passphrase1 = | |
1843a425 | 821 | read_passphrase("Enter new passphrase (empty for no " |
822 | "passphrase): ", RP_ALLOW_STDIN); | |
823 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
184eed6a | 824 | RP_ALLOW_STDIN); |
5260325f | 825 | |
826 | /* Verify that they are the same. */ | |
827 | if (strcmp(passphrase1, passphrase2) != 0) { | |
828 | memset(passphrase1, 0, strlen(passphrase1)); | |
829 | memset(passphrase2, 0, strlen(passphrase2)); | |
830 | xfree(passphrase1); | |
831 | xfree(passphrase2); | |
832 | printf("Pass phrases do not match. Try again.\n"); | |
833 | exit(1); | |
834 | } | |
835 | /* Destroy the other copy. */ | |
836 | memset(passphrase2, 0, strlen(passphrase2)); | |
837 | xfree(passphrase2); | |
8efc0c15 | 838 | } |
8efc0c15 | 839 | |
5260325f | 840 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 841 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 842 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 843 | memset(passphrase1, 0, strlen(passphrase1)); |
844 | xfree(passphrase1); | |
a306f2dd | 845 | key_free(private); |
5260325f | 846 | xfree(comment); |
847 | exit(1); | |
848 | } | |
849 | /* Destroy the passphrase and the copy of the key in memory. */ | |
850 | memset(passphrase1, 0, strlen(passphrase1)); | |
851 | xfree(passphrase1); | |
a306f2dd | 852 | key_free(private); /* Destroys contents */ |
5260325f | 853 | xfree(comment); |
854 | ||
855 | printf("Your identification has been saved with the new passphrase.\n"); | |
856 | exit(0); | |
857 | } | |
8efc0c15 | 858 | |
21289cd0 | 859 | /* |
860 | * Print the SSHFP RR. | |
861 | */ | |
862 | static void | |
ca75d7de | 863 | do_print_resource_record(struct passwd *pw, char *hname) |
21289cd0 | 864 | { |
865 | Key *public; | |
866 | char *comment = NULL; | |
867 | struct stat st; | |
868 | ||
869 | if (!have_identity) | |
870 | ask_filename(pw, "Enter file in which the key is"); | |
871 | if (stat(identity_file, &st) < 0) { | |
872 | perror(identity_file); | |
873 | exit(1); | |
874 | } | |
875 | public = key_load_public(identity_file, &comment); | |
876 | if (public != NULL) { | |
ca75d7de | 877 | export_dns_rr(hname, public, stdout, print_generic); |
21289cd0 | 878 | key_free(public); |
879 | xfree(comment); | |
880 | exit(0); | |
881 | } | |
882 | if (comment) | |
883 | xfree(comment); | |
884 | ||
885 | printf("failed to read v2 public key from %s.\n", identity_file); | |
886 | exit(1); | |
887 | } | |
21289cd0 | 888 | |
5260325f | 889 | /* |
890 | * Change the comment of a private key file. | |
891 | */ | |
396c147e | 892 | static void |
8efc0c15 | 893 | do_change_comment(struct passwd *pw) |
894 | { | |
1c9a907f | 895 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 896 | Key *private; |
897 | Key *public; | |
5260325f | 898 | struct stat st; |
899 | FILE *f; | |
1c9a907f | 900 | int fd; |
5260325f | 901 | |
902 | if (!have_identity) | |
903 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 904 | if (stat(identity_file, &st) < 0) { |
905 | perror(identity_file); | |
906 | exit(1); | |
907 | } | |
aeaa3d9e | 908 | private = key_load_private(identity_file, "", &comment); |
909 | if (private == NULL) { | |
5260325f | 910 | if (identity_passphrase) |
911 | passphrase = xstrdup(identity_passphrase); | |
912 | else if (identity_new_passphrase) | |
913 | passphrase = xstrdup(identity_new_passphrase); | |
914 | else | |
1843a425 | 915 | passphrase = read_passphrase("Enter passphrase: ", |
916 | RP_ALLOW_STDIN); | |
5260325f | 917 | /* Try to load using the passphrase. */ |
aeaa3d9e | 918 | private = key_load_private(identity_file, passphrase, &comment); |
919 | if (private == NULL) { | |
5260325f | 920 | memset(passphrase, 0, strlen(passphrase)); |
921 | xfree(passphrase); | |
922 | printf("Bad passphrase.\n"); | |
923 | exit(1); | |
924 | } | |
aeaa3d9e | 925 | } else { |
926 | passphrase = xstrdup(""); | |
5260325f | 927 | } |
aeaa3d9e | 928 | if (private->type != KEY_RSA1) { |
929 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
930 | key_free(private); | |
931 | exit(1); | |
184eed6a | 932 | } |
5260325f | 933 | printf("Key now has comment '%s'\n", comment); |
934 | ||
935 | if (identity_comment) { | |
936 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
937 | } else { | |
938 | printf("Enter new comment: "); | |
939 | fflush(stdout); | |
940 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
941 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 942 | key_free(private); |
5260325f | 943 | exit(1); |
944 | } | |
5260325f | 945 | if (strchr(new_comment, '\n')) |
946 | *strchr(new_comment, '\n') = 0; | |
947 | } | |
948 | ||
949 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 950 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
58cfa257 | 951 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 952 | memset(passphrase, 0, strlen(passphrase)); |
953 | xfree(passphrase); | |
a306f2dd | 954 | key_free(private); |
5260325f | 955 | xfree(comment); |
956 | exit(1); | |
8efc0c15 | 957 | } |
5260325f | 958 | memset(passphrase, 0, strlen(passphrase)); |
959 | xfree(passphrase); | |
aeaa3d9e | 960 | public = key_from_private(private); |
a306f2dd | 961 | key_free(private); |
5260325f | 962 | |
5260325f | 963 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 964 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
965 | if (fd == -1) { | |
5260325f | 966 | printf("Could not save your public key in %s\n", identity_file); |
967 | exit(1); | |
968 | } | |
1c9a907f | 969 | f = fdopen(fd, "w"); |
970 | if (f == NULL) { | |
971 | printf("fdopen %s failed", identity_file); | |
972 | exit(1); | |
973 | } | |
a306f2dd | 974 | if (!key_write(public, f)) |
975 | fprintf(stderr, "write key failed"); | |
976 | key_free(public); | |
977 | fprintf(f, " %s\n", new_comment); | |
5260325f | 978 | fclose(f); |
979 | ||
980 | xfree(comment); | |
981 | ||
982 | printf("The comment in your key file has been changed.\n"); | |
983 | exit(0); | |
8efc0c15 | 984 | } |
985 | ||
396c147e | 986 | static void |
5ad13cd7 | 987 | usage(void) |
988 | { | |
58153e34 | 989 | fprintf(stderr, "Usage: %s [options]\n", __progname); |
990 | fprintf(stderr, "Options:\n"); | |
4feb61af | 991 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
992 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
58153e34 | 993 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
4feb61af | 994 | fprintf(stderr, " -C comment Provide new comment.\n"); |
58153e34 | 995 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
4feb61af | 996 | #ifdef SMARTCARD |
997 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
998 | #endif /* SMARTCARD */ | |
58153e34 | 999 | fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n"); |
4feb61af | 1000 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
58153e34 | 1001 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
4feb61af | 1002 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
21289cd0 | 1003 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
4feb61af | 1004 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
58153e34 | 1005 | fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n"); |
1006 | fprintf(stderr, " -l Show fingerprint of key file.\n"); | |
4feb61af | 1007 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
58153e34 | 1008 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
1009 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
4feb61af | 1010 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
1011 | fprintf(stderr, " -q Quiet.\n"); | |
1012 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
21289cd0 | 1013 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
4feb61af | 1014 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
1015 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
1016 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
58153e34 | 1017 | #ifdef SMARTCARD |
58153e34 | 1018 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
1019 | #endif /* SMARTCARD */ | |
4feb61af | 1020 | fprintf(stderr, " -v Verbose.\n"); |
1021 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
1022 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
c35a6dc5 | 1023 | |
5260325f | 1024 | exit(1); |
5ad13cd7 | 1025 | } |
1026 | ||
5260325f | 1027 | /* |
1028 | * Main program for key management. | |
1029 | */ | |
8efc0c15 | 1030 | int |
1031 | main(int ac, char **av) | |
1032 | { | |
3dc93cd8 | 1033 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
8f52069e | 1034 | char out_file[MAXPATHLEN], *reader_id = NULL; |
bdffbcdc | 1035 | char *rr_hostname = NULL; |
1c9a907f | 1036 | Key *private, *public; |
5260325f | 1037 | struct passwd *pw; |
5260325f | 1038 | struct stat st; |
c784ae09 | 1039 | int opt, type, fd, download = 0; |
2a1995a3 | 1040 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; |
c35a6dc5 | 1041 | int do_gen_candidates = 0, do_screen_candidates = 0; |
c6fbc95a | 1042 | int log_level = SYSLOG_LEVEL_INFO; |
c35a6dc5 | 1043 | BIGNUM *start = NULL; |
5260325f | 1044 | FILE *f; |
de4feb6b | 1045 | const char *errstr; |
fa08c86b | 1046 | |
5260325f | 1047 | extern int optind; |
1048 | extern char *optarg; | |
1049 | ||
fd6168c1 | 1050 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1051 | sanitise_stdfd(); | |
1052 | ||
fda04d7d | 1053 | __progname = ssh_get_progname(av[0]); |
264dce47 | 1054 | |
fa649821 | 1055 | SSLeay_add_all_algorithms(); |
c35a6dc5 | 1056 | log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
1057 | ||
ce88d9df | 1058 | init_rng(); |
1059 | seed_rng(); | |
a306f2dd | 1060 | |
aa3378df | 1061 | /* we need this for the home * directory. */ |
5260325f | 1062 | pw = getpwuid(getuid()); |
1063 | if (!pw) { | |
1064 | printf("You don't exist, go away!\n"); | |
1065 | exit(1); | |
1066 | } | |
a306f2dd | 1067 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
1068 | perror("gethostname"); | |
1069 | exit(1); | |
1070 | } | |
aa3378df | 1071 | |
c35a6dc5 | 1072 | while ((opt = getopt(ac, av, |
bdffbcdc | 1073 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
5260325f | 1074 | switch (opt) { |
1075 | case 'b': | |
c6d7b211 | 1076 | bits = strtonum(optarg, 768, 32768, &errstr); |
de4feb6b | 1077 | if (errstr) |
1078 | fatal("Bits has bad value %s (%s)", | |
1079 | optarg, errstr); | |
5260325f | 1080 | break; |
bdffbcdc | 1081 | case 'F': |
1082 | find_host = 1; | |
1083 | rr_hostname = optarg; | |
1084 | break; | |
1085 | case 'H': | |
1086 | hash_hosts = 1; | |
1087 | break; | |
1088 | case 'R': | |
1089 | delete_host = 1; | |
1090 | rr_hostname = optarg; | |
1091 | break; | |
5260325f | 1092 | case 'l': |
1093 | print_fingerprint = 1; | |
1094 | break; | |
aaf45d87 | 1095 | case 'B': |
1096 | print_bubblebabble = 1; | |
1097 | break; | |
5260325f | 1098 | case 'p': |
1099 | change_passphrase = 1; | |
1100 | break; | |
5260325f | 1101 | case 'c': |
1102 | change_comment = 1; | |
1103 | break; | |
5260325f | 1104 | case 'f': |
c784ae09 | 1105 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1106 | sizeof(identity_file)) | |
1107 | fatal("Identity filename too long"); | |
5260325f | 1108 | have_identity = 1; |
1109 | break; | |
21289cd0 | 1110 | case 'g': |
1111 | print_generic = 1; | |
1112 | break; | |
5260325f | 1113 | case 'P': |
1114 | identity_passphrase = optarg; | |
1115 | break; | |
5260325f | 1116 | case 'N': |
1117 | identity_new_passphrase = optarg; | |
1118 | break; | |
5260325f | 1119 | case 'C': |
1120 | identity_comment = optarg; | |
1121 | break; | |
5260325f | 1122 | case 'q': |
1123 | quiet = 1; | |
1124 | break; | |
5deceabb | 1125 | case 'e': |
a306f2dd | 1126 | case 'x': |
5deceabb | 1127 | /* export key */ |
a306f2dd | 1128 | convert_to_ssh2 = 1; |
1129 | break; | |
5deceabb | 1130 | case 'i': |
a306f2dd | 1131 | case 'X': |
5deceabb | 1132 | /* import key */ |
a306f2dd | 1133 | convert_from_ssh2 = 1; |
1134 | break; | |
a306f2dd | 1135 | case 'y': |
1136 | print_public = 1; | |
1137 | break; | |
a306f2dd | 1138 | case 'd': |
fa08c86b | 1139 | key_type_name = "dsa"; |
a306f2dd | 1140 | break; |
fa08c86b | 1141 | case 't': |
1142 | key_type_name = optarg; | |
fa08c86b | 1143 | break; |
93a56445 | 1144 | case 'D': |
1145 | download = 1; | |
285d2b15 | 1146 | case 'U': |
93a56445 | 1147 | reader_id = optarg; |
2b30154a | 1148 | break; |
c6fbc95a | 1149 | case 'v': |
1150 | if (log_level == SYSLOG_LEVEL_INFO) | |
1151 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1152 | else { | |
f2107e97 | 1153 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
c6fbc95a | 1154 | log_level < SYSLOG_LEVEL_DEBUG3) |
1155 | log_level++; | |
1156 | } | |
1157 | break; | |
21289cd0 | 1158 | case 'r': |
bdffbcdc | 1159 | rr_hostname = optarg; |
21289cd0 | 1160 | break; |
c35a6dc5 | 1161 | case 'W': |
c784ae09 | 1162 | generator_wanted = strtonum(optarg, 1, UINT_MAX, &errstr); |
1163 | if (errstr) | |
1164 | fatal("Desired generator has bad value: %s (%s)", | |
1165 | optarg, errstr); | |
c35a6dc5 | 1166 | break; |
1167 | case 'a': | |
c784ae09 | 1168 | trials = strtonum(optarg, 1, UINT_MAX, &errstr); |
1169 | if (errstr) | |
1170 | fatal("Invalid number of trials: %s (%s)", | |
1171 | optarg, errstr); | |
c35a6dc5 | 1172 | break; |
1173 | case 'M': | |
c784ae09 | 1174 | memory = strtonum(optarg, 1, UINT_MAX, &errstr); |
1175 | if (errstr) { | |
1176 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1177 | } | |
c35a6dc5 | 1178 | break; |
1179 | case 'G': | |
1180 | do_gen_candidates = 1; | |
c784ae09 | 1181 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1182 | sizeof(out_file)) | |
1183 | fatal("Output filename too long"); | |
c35a6dc5 | 1184 | break; |
1185 | case 'T': | |
1186 | do_screen_candidates = 1; | |
c784ae09 | 1187 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1188 | sizeof(out_file)) | |
1189 | fatal("Output filename too long"); | |
c35a6dc5 | 1190 | break; |
1191 | case 'S': | |
1192 | /* XXX - also compare length against bits */ | |
1193 | if (BN_hex2bn(&start, optarg) == 0) | |
1194 | fatal("Invalid start point."); | |
1195 | break; | |
5260325f | 1196 | case '?': |
1197 | default: | |
1198 | usage(); | |
1199 | } | |
1200 | } | |
c6fbc95a | 1201 | |
1202 | /* reinit */ | |
1203 | log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1); | |
1204 | ||
5260325f | 1205 | if (optind < ac) { |
1206 | printf("Too many arguments.\n"); | |
1207 | usage(); | |
1208 | } | |
1209 | if (change_passphrase && change_comment) { | |
1210 | printf("Can only have one of -p and -c.\n"); | |
1211 | usage(); | |
1212 | } | |
bdffbcdc | 1213 | if (delete_host || hash_hosts || find_host) |
1214 | do_known_hosts(pw, rr_hostname); | |
aaf45d87 | 1215 | if (print_fingerprint || print_bubblebabble) |
5260325f | 1216 | do_fingerprint(pw); |
5260325f | 1217 | if (change_passphrase) |
1218 | do_change_passphrase(pw); | |
633151a3 | 1219 | if (change_comment) |
1220 | do_change_comment(pw); | |
ce88d9df | 1221 | if (convert_to_ssh2) |
1222 | do_convert_to_ssh2(pw); | |
1223 | if (convert_from_ssh2) | |
1224 | do_convert_from_ssh2(pw); | |
a306f2dd | 1225 | if (print_public) |
1226 | do_print_public(pw); | |
bdffbcdc | 1227 | if (rr_hostname != NULL) { |
1228 | do_print_resource_record(pw, rr_hostname); | |
21289cd0 | 1229 | } |
93a56445 | 1230 | if (reader_id != NULL) { |
4f831fd7 | 1231 | #ifdef SMARTCARD |
93a56445 | 1232 | if (download) |
1233 | do_download(pw, reader_id); | |
1234 | else | |
1235 | do_upload(pw, reader_id); | |
3e984472 | 1236 | #else /* SMARTCARD */ |
4f831fd7 | 1237 | fatal("no support for smartcards."); |
3e984472 | 1238 | #endif /* SMARTCARD */ |
93a56445 | 1239 | } |
5260325f | 1240 | |
c35a6dc5 | 1241 | if (do_gen_candidates) { |
1242 | FILE *out = fopen(out_file, "w"); | |
b6453d99 | 1243 | |
c35a6dc5 | 1244 | if (out == NULL) { |
1245 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1246 | out_file, strerror(errno)); | |
1247 | return (1); | |
1248 | } | |
255d3e00 | 1249 | if (bits == 0) |
1250 | bits = DEFAULT_BITS; | |
c35a6dc5 | 1251 | if (gen_candidates(out, memory, bits, start) != 0) |
17318dd6 | 1252 | fatal("modulus candidate generation failed"); |
c35a6dc5 | 1253 | |
1254 | return (0); | |
1255 | } | |
1256 | ||
1257 | if (do_screen_candidates) { | |
1258 | FILE *in; | |
1259 | FILE *out = fopen(out_file, "w"); | |
1260 | ||
1261 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1262 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1263 | fatal("Couldn't open modulus candidate " | |
aff51935 | 1264 | "file \"%s\": %s", identity_file, |
c35a6dc5 | 1265 | strerror(errno)); |
1266 | } | |
1267 | } else | |
1268 | in = stdin; | |
1269 | ||
1270 | if (out == NULL) { | |
1271 | fatal("Couldn't open moduli file \"%s\": %s", | |
1272 | out_file, strerror(errno)); | |
1273 | } | |
1274 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
17318dd6 | 1275 | fatal("modulus screening failed"); |
08d035b6 | 1276 | return (0); |
c35a6dc5 | 1277 | } |
1278 | ||
5260325f | 1279 | arc4random_stir(); |
1280 | ||
882c9d5a | 1281 | if (key_type_name == NULL) |
1282 | key_type_name = "rsa"; | |
1283 | ||
c523303b | 1284 | type = key_type_from_name(key_type_name); |
1285 | if (type == KEY_UNSPEC) { | |
1286 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1287 | exit(1); | |
a306f2dd | 1288 | } |
255d3e00 | 1289 | if (bits == 0) |
1290 | bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; | |
6e94bd72 | 1291 | if (type == KEY_DSA && bits != 1024) |
1292 | fatal("DSA keys must be 1024 bits"); | |
60dc0294 | 1293 | if (!quiet) |
1294 | printf("Generating public/private %s key pair.\n", key_type_name); | |
fa08c86b | 1295 | private = key_generate(type, bits); |
1296 | if (private == NULL) { | |
1297 | fprintf(stderr, "key_generate failed"); | |
1298 | exit(1); | |
1299 | } | |
1300 | public = key_from_private(private); | |
5260325f | 1301 | |
1302 | if (!have_identity) | |
1303 | ask_filename(pw, "Enter file in which to save the key"); | |
1304 | ||
7b9b0103 | 1305 | /* Create ~/.ssh directory if it doesn't already exist. */ |
42f11eb2 | 1306 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 1307 | if (strstr(identity_file, dotsshdir) != NULL && |
1308 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 1309 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 1310 | error("Could not create directory '%s'.", dotsshdir); |
1311 | else if (!quiet) | |
1312 | printf("Created directory '%s'.\n", dotsshdir); | |
1313 | } | |
1314 | /* If the file already exists, ask the user to confirm. */ | |
1315 | if (stat(identity_file, &st) >= 0) { | |
1316 | char yesno[3]; | |
1317 | printf("%s already exists.\n", identity_file); | |
1318 | printf("Overwrite (y/n)? "); | |
1319 | fflush(stdout); | |
1320 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1321 | exit(1); | |
1322 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1323 | exit(1); | |
1324 | } | |
1325 | /* Ask for a passphrase (twice). */ | |
1326 | if (identity_passphrase) | |
1327 | passphrase1 = xstrdup(identity_passphrase); | |
1328 | else if (identity_new_passphrase) | |
1329 | passphrase1 = xstrdup(identity_new_passphrase); | |
1330 | else { | |
1331 | passphrase_again: | |
1332 | passphrase1 = | |
1843a425 | 1333 | read_passphrase("Enter passphrase (empty for no " |
1334 | "passphrase): ", RP_ALLOW_STDIN); | |
1335 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1336 | RP_ALLOW_STDIN); | |
5260325f | 1337 | if (strcmp(passphrase1, passphrase2) != 0) { |
1843a425 | 1338 | /* |
1339 | * The passphrases do not match. Clear them and | |
1340 | * retry. | |
1341 | */ | |
5260325f | 1342 | memset(passphrase1, 0, strlen(passphrase1)); |
1343 | memset(passphrase2, 0, strlen(passphrase2)); | |
1344 | xfree(passphrase1); | |
1345 | xfree(passphrase2); | |
1346 | printf("Passphrases do not match. Try again.\n"); | |
1347 | goto passphrase_again; | |
1348 | } | |
1349 | /* Clear the other copy of the passphrase. */ | |
1350 | memset(passphrase2, 0, strlen(passphrase2)); | |
1351 | xfree(passphrase2); | |
1352 | } | |
1353 | ||
5260325f | 1354 | if (identity_comment) { |
1355 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1356 | } else { | |
6ae2364d | 1357 | /* Create default commend field for the passphrase. */ |
5260325f | 1358 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
1359 | } | |
1360 | ||
1361 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 1362 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 1363 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 1364 | memset(passphrase1, 0, strlen(passphrase1)); |
1365 | xfree(passphrase1); | |
1366 | exit(1); | |
1367 | } | |
1368 | /* Clear the passphrase. */ | |
1369 | memset(passphrase1, 0, strlen(passphrase1)); | |
1370 | xfree(passphrase1); | |
1371 | ||
1372 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 1373 | key_free(private); |
5260325f | 1374 | arc4random_stir(); |
1375 | ||
1376 | if (!quiet) | |
1377 | printf("Your identification has been saved in %s.\n", identity_file); | |
1378 | ||
5260325f | 1379 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1380 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1381 | if (fd == -1) { | |
5260325f | 1382 | printf("Could not save your public key in %s\n", identity_file); |
1383 | exit(1); | |
1384 | } | |
1c9a907f | 1385 | f = fdopen(fd, "w"); |
1386 | if (f == NULL) { | |
1387 | printf("fdopen %s failed", identity_file); | |
1388 | exit(1); | |
1389 | } | |
a306f2dd | 1390 | if (!key_write(public, f)) |
1391 | fprintf(stderr, "write key failed"); | |
1392 | fprintf(f, " %s\n", comment); | |
5260325f | 1393 | fclose(f); |
1394 | ||
1395 | if (!quiet) { | |
22138a36 | 1396 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
a306f2dd | 1397 | printf("Your public key has been saved in %s.\n", |
1398 | identity_file); | |
5260325f | 1399 | printf("The key fingerprint is:\n"); |
22138a36 | 1400 | printf("%s %s\n", fp, comment); |
1401 | xfree(fp); | |
8efc0c15 | 1402 | } |
a306f2dd | 1403 | |
1404 | key_free(public); | |
5260325f | 1405 | exit(0); |
8efc0c15 | 1406 | } |