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31de76cc | 1 | /* $OpenBSD: ssh-keygen.c,v 1.170 2008/06/12 21:14:46 grunk Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
4 | * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
5 | * All rights reserved | |
5260325f | 6 | * Identity and host key generation and maintenance. |
bcbf86ec | 7 | * |
8 | * As far as I am concerned, the code I have written for this software | |
9 | * can be used freely for any purpose. Any derived versions of this | |
10 | * software must be clearly marked as such, and if the derived work is | |
11 | * incompatible with the protocol description in the RFC file, it must be | |
12 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 13 | */ |
8efc0c15 | 14 | |
15 | #include "includes.h" | |
4095f623 | 16 | |
17 | #include <sys/types.h> | |
5b04a8bf | 18 | #include <sys/socket.h> |
4095f623 | 19 | #include <sys/stat.h> |
536c14e8 | 20 | #include <sys/param.h> |
8efc0c15 | 21 | |
a306f2dd | 22 | #include <openssl/evp.h> |
23 | #include <openssl/pem.h> | |
f5f25d17 | 24 | #include "openbsd-compat/openssl-compat.h" |
a306f2dd | 25 | |
028094f4 | 26 | #include <errno.h> |
d3221cca | 27 | #include <fcntl.h> |
28cb0a43 | 28 | #include <netdb.h> |
42685763 | 29 | #ifdef HAVE_PATHS_H |
30 | # include <paths.h> | |
31 | #endif | |
b1842393 | 32 | #include <pwd.h> |
24436b92 | 33 | #include <stdarg.h> |
cf851879 | 34 | #include <stdio.h> |
ffa517a8 | 35 | #include <stdlib.h> |
00146caa | 36 | #include <string.h> |
5188ba17 | 37 | #include <unistd.h> |
b1842393 | 38 | |
8efc0c15 | 39 | #include "xmalloc.h" |
a306f2dd | 40 | #include "key.h" |
457fc0c6 | 41 | #include "rsa.h" |
a306f2dd | 42 | #include "authfile.h" |
43 | #include "uuencode.h" | |
94ec8c6b | 44 | #include "buffer.h" |
42f11eb2 | 45 | #include "pathnames.h" |
46 | #include "log.h" | |
58ae9cb8 | 47 | #include "misc.h" |
bdffbcdc | 48 | #include "match.h" |
49 | #include "hostfile.h" | |
0cbe25f0 | 50 | #include "dns.h" |
94ec8c6b | 51 | |
93a56445 | 52 | #ifdef SMARTCARD |
93a56445 | 53 | #include "scard.h" |
dd2495cb | 54 | #endif |
2b30154a | 55 | |
255d3e00 | 56 | /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ |
57 | #define DEFAULT_BITS 2048 | |
58 | #define DEFAULT_BITS_DSA 1024 | |
59 | u_int32_t bits = 0; | |
8efc0c15 | 60 | |
aa3378df | 61 | /* |
62 | * Flag indicating that we just want to change the passphrase. This can be | |
63 | * set on the command line. | |
64 | */ | |
8efc0c15 | 65 | int change_passphrase = 0; |
66 | ||
aa3378df | 67 | /* |
68 | * Flag indicating that we just want to change the comment. This can be set | |
69 | * on the command line. | |
70 | */ | |
8efc0c15 | 71 | int change_comment = 0; |
72 | ||
73 | int quiet = 0; | |
74 | ||
639211b7 | 75 | int log_level = SYSLOG_LEVEL_INFO; |
76 | ||
bdffbcdc | 77 | /* Flag indicating that we want to hash a known_hosts file */ |
78 | int hash_hosts = 0; | |
79 | /* Flag indicating that we want lookup a host in known_hosts file */ | |
80 | int find_host = 0; | |
81 | /* Flag indicating that we want to delete a host from a known_hosts file */ | |
82 | int delete_host = 0; | |
83 | ||
f095fcc7 | 84 | /* Flag indicating that we just want to see the key fingerprint */ |
85 | int print_fingerprint = 0; | |
aaf45d87 | 86 | int print_bubblebabble = 0; |
f095fcc7 | 87 | |
5ad13cd7 | 88 | /* The identity file name, given on the command line or entered by the user. */ |
89 | char identity_file[1024]; | |
90 | int have_identity = 0; | |
8efc0c15 | 91 | |
92 | /* This is set to the passphrase if given on the command line. */ | |
93 | char *identity_passphrase = NULL; | |
94 | ||
95 | /* This is set to the new passphrase if given on the command line. */ | |
96 | char *identity_new_passphrase = NULL; | |
97 | ||
98 | /* This is set to the new comment if given on the command line. */ | |
99 | char *identity_comment = NULL; | |
100 | ||
a306f2dd | 101 | /* Dump public key file in format used by real and the original SSH 2 */ |
102 | int convert_to_ssh2 = 0; | |
103 | int convert_from_ssh2 = 0; | |
104 | int print_public = 0; | |
21289cd0 | 105 | int print_generic = 0; |
fa08c86b | 106 | |
3dc93cd8 | 107 | char *key_type_name = NULL; |
a306f2dd | 108 | |
5ad13cd7 | 109 | /* argv0 */ |
110 | extern char *__progname; | |
8efc0c15 | 111 | |
a306f2dd | 112 | char hostname[MAXHOSTNAMELEN]; |
113 | ||
20eea1d7 | 114 | /* moduli.c */ |
c784ae09 | 115 | int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
20eea1d7 | 116 | int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
117 | ||
396c147e | 118 | static void |
5ad13cd7 | 119 | ask_filename(struct passwd *pw, const char *prompt) |
8efc0c15 | 120 | { |
5260325f | 121 | char buf[1024]; |
c523303b | 122 | char *name = NULL; |
123 | ||
8d22d775 | 124 | if (key_type_name == NULL) |
42f11eb2 | 125 | name = _PATH_SSH_CLIENT_ID_RSA; |
32596c7b | 126 | else { |
8d22d775 | 127 | switch (key_type_from_name(key_type_name)) { |
128 | case KEY_RSA1: | |
129 | name = _PATH_SSH_CLIENT_IDENTITY; | |
130 | break; | |
131 | case KEY_DSA: | |
132 | name = _PATH_SSH_CLIENT_ID_DSA; | |
133 | break; | |
134 | case KEY_RSA: | |
135 | name = _PATH_SSH_CLIENT_ID_RSA; | |
136 | break; | |
137 | default: | |
138 | fprintf(stderr, "bad key type"); | |
139 | exit(1); | |
140 | break; | |
141 | } | |
32596c7b | 142 | } |
c523303b | 143 | snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
8d88011e | 144 | fprintf(stderr, "%s (%s): ", prompt, identity_file); |
5260325f | 145 | if (fgets(buf, sizeof(buf), stdin) == NULL) |
146 | exit(1); | |
b05117ac | 147 | buf[strcspn(buf, "\n")] = '\0'; |
5260325f | 148 | if (strcmp(buf, "") != 0) |
149 | strlcpy(identity_file, buf, sizeof(identity_file)); | |
150 | have_identity = 1; | |
f095fcc7 | 151 | } |
8efc0c15 | 152 | |
396c147e | 153 | static Key * |
abe0fb9f | 154 | load_identity(char *filename) |
a306f2dd | 155 | { |
aeaa3d9e | 156 | char *pass; |
157 | Key *prv; | |
158 | ||
cd332296 | 159 | prv = key_load_private(filename, "", NULL); |
aeaa3d9e | 160 | if (prv == NULL) { |
abe0fb9f | 161 | if (identity_passphrase) |
162 | pass = xstrdup(identity_passphrase); | |
163 | else | |
1843a425 | 164 | pass = read_passphrase("Enter passphrase: ", |
165 | RP_ALLOW_STDIN); | |
aeaa3d9e | 166 | prv = key_load_private(filename, pass, NULL); |
a306f2dd | 167 | memset(pass, 0, strlen(pass)); |
168 | xfree(pass); | |
169 | } | |
aeaa3d9e | 170 | return prv; |
a306f2dd | 171 | } |
172 | ||
94ec8c6b | 173 | #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
7203d6bb | 174 | #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
94ec8c6b | 175 | #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
2b87da3b | 176 | #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
a306f2dd | 177 | |
396c147e | 178 | static void |
a306f2dd | 179 | do_convert_to_ssh2(struct passwd *pw) |
180 | { | |
b587c165 | 181 | Key *k; |
21b30f38 | 182 | u_int len; |
1e3b8b07 | 183 | u_char *blob; |
a306f2dd | 184 | struct stat st; |
185 | ||
186 | if (!have_identity) | |
187 | ask_filename(pw, "Enter file in which the key is"); | |
188 | if (stat(identity_file, &st) < 0) { | |
189 | perror(identity_file); | |
190 | exit(1); | |
191 | } | |
b587c165 | 192 | if ((k = key_load_public(identity_file, NULL)) == NULL) { |
abe0fb9f | 193 | if ((k = load_identity(identity_file)) == NULL) { |
b587c165 | 194 | fprintf(stderr, "load failed\n"); |
195 | exit(1); | |
196 | } | |
a306f2dd | 197 | } |
3566c73c | 198 | if (k->type == KEY_RSA1) { |
199 | fprintf(stderr, "version 1 keys are not supported\n"); | |
200 | exit(1); | |
201 | } | |
f7436b8c | 202 | if (key_to_blob(k, &blob, &len) <= 0) { |
203 | fprintf(stderr, "key_to_blob failed\n"); | |
204 | exit(1); | |
205 | } | |
94ec8c6b | 206 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
a306f2dd | 207 | fprintf(stdout, |
512df038 | 208 | "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", |
b587c165 | 209 | key_size(k), key_type(k), |
a306f2dd | 210 | pw->pw_name, hostname); |
211 | dump_base64(stdout, blob, len); | |
94ec8c6b | 212 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
b587c165 | 213 | key_free(k); |
a306f2dd | 214 | xfree(blob); |
215 | exit(0); | |
216 | } | |
217 | ||
396c147e | 218 | static void |
94ec8c6b | 219 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
220 | { | |
ca75d7de | 221 | u_int bignum_bits = buffer_get_int(b); |
222 | u_int bytes = (bignum_bits + 7) / 8; | |
457fc0c6 | 223 | |
94ec8c6b | 224 | if (buffer_len(b) < bytes) |
457fc0c6 | 225 | fatal("buffer_get_bignum_bits: input buffer too small: " |
226 | "need %d have %d", bytes, buffer_len(b)); | |
e516451d | 227 | if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL) |
228 | fatal("buffer_get_bignum_bits: BN_bin2bn failed"); | |
94ec8c6b | 229 | buffer_consume(b, bytes); |
230 | } | |
231 | ||
396c147e | 232 | static Key * |
c66f9d0e | 233 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
94ec8c6b | 234 | { |
235 | Buffer b; | |
94ec8c6b | 236 | Key *key = NULL; |
a599bd06 | 237 | char *type, *cipher; |
d3260e12 | 238 | u_char *sig, data[] = "abcde12345"; |
2e0becb6 | 239 | int magic, rlen, ktype, i1, i2, i3, i4; |
a599bd06 | 240 | u_int slen; |
2e0becb6 | 241 | u_long e; |
94ec8c6b | 242 | |
243 | buffer_init(&b); | |
244 | buffer_append(&b, blob, blen); | |
245 | ||
803c4226 | 246 | magic = buffer_get_int(&b); |
94ec8c6b | 247 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { |
248 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
249 | buffer_free(&b); | |
250 | return NULL; | |
251 | } | |
2e0becb6 | 252 | i1 = buffer_get_int(&b); |
94ec8c6b | 253 | type = buffer_get_string(&b, NULL); |
254 | cipher = buffer_get_string(&b, NULL); | |
2e0becb6 | 255 | i2 = buffer_get_int(&b); |
256 | i3 = buffer_get_int(&b); | |
257 | i4 = buffer_get_int(&b); | |
4f6e2ba9 | 258 | debug("ignore (%d %d %d %d)", i1, i2, i3, i4); |
94ec8c6b | 259 | if (strcmp(cipher, "none") != 0) { |
260 | error("unsupported cipher %s", cipher); | |
261 | xfree(cipher); | |
262 | buffer_free(&b); | |
457fc0c6 | 263 | xfree(type); |
94ec8c6b | 264 | return NULL; |
265 | } | |
266 | xfree(cipher); | |
267 | ||
457fc0c6 | 268 | if (strstr(type, "dsa")) { |
269 | ktype = KEY_DSA; | |
270 | } else if (strstr(type, "rsa")) { | |
271 | ktype = KEY_RSA; | |
272 | } else { | |
3c460ede | 273 | buffer_free(&b); |
457fc0c6 | 274 | xfree(type); |
94ec8c6b | 275 | return NULL; |
276 | } | |
457fc0c6 | 277 | key = key_new_private(ktype); |
278 | xfree(type); | |
279 | ||
280 | switch (key->type) { | |
281 | case KEY_DSA: | |
282 | buffer_get_bignum_bits(&b, key->dsa->p); | |
283 | buffer_get_bignum_bits(&b, key->dsa->g); | |
284 | buffer_get_bignum_bits(&b, key->dsa->q); | |
285 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
286 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
287 | break; | |
288 | case KEY_RSA: | |
803c4226 | 289 | e = buffer_get_char(&b); |
2e0becb6 | 290 | debug("e %lx", e); |
291 | if (e < 30) { | |
292 | e <<= 8; | |
293 | e += buffer_get_char(&b); | |
294 | debug("e %lx", e); | |
295 | e <<= 8; | |
296 | e += buffer_get_char(&b); | |
297 | debug("e %lx", e); | |
298 | } | |
299 | if (!BN_set_word(key->rsa->e, e)) { | |
457fc0c6 | 300 | buffer_free(&b); |
301 | key_free(key); | |
302 | return NULL; | |
303 | } | |
304 | buffer_get_bignum_bits(&b, key->rsa->d); | |
305 | buffer_get_bignum_bits(&b, key->rsa->n); | |
306 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
307 | buffer_get_bignum_bits(&b, key->rsa->q); | |
308 | buffer_get_bignum_bits(&b, key->rsa->p); | |
2b63e803 | 309 | rsa_generate_additional_parameters(key->rsa); |
457fc0c6 | 310 | break; |
311 | } | |
94ec8c6b | 312 | rlen = buffer_len(&b); |
6aacefa7 | 313 | if (rlen != 0) |
457fc0c6 | 314 | error("do_convert_private_ssh2_from_blob: " |
315 | "remaining bytes in key blob %d", rlen); | |
94ec8c6b | 316 | buffer_free(&b); |
a599bd06 | 317 | |
318 | /* try the key */ | |
319 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
320 | key_verify(key, sig, slen, data, sizeof(data)); | |
321 | xfree(sig); | |
94ec8c6b | 322 | return key; |
323 | } | |
324 | ||
15b81af3 | 325 | static int |
326 | get_line(FILE *fp, char *line, size_t len) | |
327 | { | |
328 | int c; | |
329 | size_t pos = 0; | |
330 | ||
331 | line[0] = '\0'; | |
332 | while ((c = fgetc(fp)) != EOF) { | |
333 | if (pos >= len - 1) { | |
334 | fprintf(stderr, "input line too long.\n"); | |
335 | exit(1); | |
336 | } | |
32596c7b | 337 | switch (c) { |
15b81af3 | 338 | case '\r': |
339 | c = fgetc(fp); | |
340 | if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { | |
341 | fprintf(stderr, "unget: %s\n", strerror(errno)); | |
342 | exit(1); | |
343 | } | |
344 | return pos; | |
345 | case '\n': | |
346 | return pos; | |
347 | } | |
348 | line[pos++] = c; | |
349 | line[pos] = '\0'; | |
350 | } | |
cbaa43c0 | 351 | /* We reached EOF */ |
352 | return -1; | |
15b81af3 | 353 | } |
354 | ||
396c147e | 355 | static void |
a306f2dd | 356 | do_convert_from_ssh2(struct passwd *pw) |
357 | { | |
358 | Key *k; | |
359 | int blen; | |
783dbbdc | 360 | u_int len; |
15b81af3 | 361 | char line[1024]; |
cf54363d | 362 | u_char blob[8096]; |
a306f2dd | 363 | char encoded[8096]; |
364 | struct stat st; | |
94ec8c6b | 365 | int escaped = 0, private = 0, ok; |
a306f2dd | 366 | FILE *fp; |
367 | ||
368 | if (!have_identity) | |
369 | ask_filename(pw, "Enter file in which the key is"); | |
370 | if (stat(identity_file, &st) < 0) { | |
371 | perror(identity_file); | |
372 | exit(1); | |
373 | } | |
374 | fp = fopen(identity_file, "r"); | |
375 | if (fp == NULL) { | |
376 | perror(identity_file); | |
377 | exit(1); | |
378 | } | |
379 | encoded[0] = '\0'; | |
15b81af3 | 380 | while ((blen = get_line(fp, line, sizeof(line))) != -1) { |
381 | if (line[blen - 1] == '\\') | |
d0c832f3 | 382 | escaped++; |
a306f2dd | 383 | if (strncmp(line, "----", 4) == 0 || |
384 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 385 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
386 | private = 1; | |
a599bd06 | 387 | if (strstr(line, " END ") != NULL) { |
388 | break; | |
389 | } | |
012bc0e1 | 390 | /* fprintf(stderr, "ignore: %s", line); */ |
a306f2dd | 391 | continue; |
392 | } | |
d0c832f3 | 393 | if (escaped) { |
394 | escaped--; | |
012bc0e1 | 395 | /* fprintf(stderr, "escaped: %s", line); */ |
d0c832f3 | 396 | continue; |
a306f2dd | 397 | } |
a306f2dd | 398 | strlcat(encoded, line, sizeof(encoded)); |
399 | } | |
783dbbdc | 400 | len = strlen(encoded); |
401 | if (((len % 4) == 3) && | |
402 | (encoded[len-1] == '=') && | |
403 | (encoded[len-2] == '=') && | |
404 | (encoded[len-3] == '=')) | |
405 | encoded[len-3] = '\0'; | |
e6207598 | 406 | blen = uudecode(encoded, blob, sizeof(blob)); |
a306f2dd | 407 | if (blen < 0) { |
408 | fprintf(stderr, "uudecode failed.\n"); | |
409 | exit(1); | |
410 | } | |
94ec8c6b | 411 | k = private ? |
412 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 413 | key_from_blob(blob, blen); |
94ec8c6b | 414 | if (k == NULL) { |
415 | fprintf(stderr, "decode blob failed.\n"); | |
416 | exit(1); | |
417 | } | |
418 | ok = private ? | |
457fc0c6 | 419 | (k->type == KEY_DSA ? |
420 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
421 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
94ec8c6b | 422 | key_write(k, stdout); |
423 | if (!ok) { | |
424 | fprintf(stderr, "key write failed"); | |
425 | exit(1); | |
426 | } | |
a306f2dd | 427 | key_free(k); |
4ccb828d | 428 | if (!private) |
429 | fprintf(stdout, "\n"); | |
a306f2dd | 430 | fclose(fp); |
431 | exit(0); | |
432 | } | |
433 | ||
396c147e | 434 | static void |
a306f2dd | 435 | do_print_public(struct passwd *pw) |
436 | { | |
aeaa3d9e | 437 | Key *prv; |
a306f2dd | 438 | struct stat st; |
439 | ||
440 | if (!have_identity) | |
441 | ask_filename(pw, "Enter file in which the key is"); | |
442 | if (stat(identity_file, &st) < 0) { | |
443 | perror(identity_file); | |
444 | exit(1); | |
445 | } | |
abe0fb9f | 446 | prv = load_identity(identity_file); |
aeaa3d9e | 447 | if (prv == NULL) { |
a306f2dd | 448 | fprintf(stderr, "load failed\n"); |
449 | exit(1); | |
450 | } | |
aeaa3d9e | 451 | if (!key_write(prv, stdout)) |
a306f2dd | 452 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 453 | key_free(prv); |
a306f2dd | 454 | fprintf(stdout, "\n"); |
455 | exit(0); | |
456 | } | |
457 | ||
4f831fd7 | 458 | #ifdef SMARTCARD |
2b30154a | 459 | static void |
93a56445 | 460 | do_upload(struct passwd *pw, const char *sc_reader_id) |
2b30154a | 461 | { |
2b30154a | 462 | Key *prv = NULL; |
463 | struct stat st; | |
b9f62352 | 464 | int ret; |
465 | ||
2b30154a | 466 | if (!have_identity) |
467 | ask_filename(pw, "Enter file in which the key is"); | |
468 | if (stat(identity_file, &st) < 0) { | |
469 | perror(identity_file); | |
b9f62352 | 470 | exit(1); |
2b30154a | 471 | } |
472 | prv = load_identity(identity_file); | |
473 | if (prv == NULL) { | |
474 | error("load failed"); | |
b9f62352 | 475 | exit(1); |
49ccba9c | 476 | } |
b9f62352 | 477 | ret = sc_put_key(prv, sc_reader_id); |
478 | key_free(prv); | |
479 | if (ret < 0) | |
480 | exit(1); | |
bbe88b6d | 481 | logit("loading key done"); |
b9f62352 | 482 | exit(0); |
2b30154a | 483 | } |
93a56445 | 484 | |
485 | static void | |
486 | do_download(struct passwd *pw, const char *sc_reader_id) | |
487 | { | |
0659cace | 488 | Key **keys = NULL; |
489 | int i; | |
93a56445 | 490 | |
0659cace | 491 | keys = sc_get_keys(sc_reader_id, NULL); |
492 | if (keys == NULL) | |
93a56445 | 493 | fatal("cannot read public key from smartcard"); |
0659cace | 494 | for (i = 0; keys[i]; i++) { |
495 | key_write(keys[i], stdout); | |
496 | key_free(keys[i]); | |
497 | fprintf(stdout, "\n"); | |
498 | } | |
499 | xfree(keys); | |
93a56445 | 500 | exit(0); |
501 | } | |
3e984472 | 502 | #endif /* SMARTCARD */ |
2b30154a | 503 | |
396c147e | 504 | static void |
f095fcc7 | 505 | do_fingerprint(struct passwd *pw) |
506 | { | |
c8d54615 | 507 | FILE *f; |
a306f2dd | 508 | Key *public; |
aff73c5f | 509 | char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra; |
f8f89bae | 510 | int i, skip = 0, num = 0, invalid = 1; |
17a3011c | 511 | enum fp_rep rep; |
512 | enum fp_type fptype; | |
5260325f | 513 | struct stat st; |
514 | ||
aeaa3d9e | 515 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
516 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 517 | |
5260325f | 518 | if (!have_identity) |
519 | ask_filename(pw, "Enter file in which the key is"); | |
520 | if (stat(identity_file, &st) < 0) { | |
521 | perror(identity_file); | |
522 | exit(1); | |
523 | } | |
aeaa3d9e | 524 | public = key_load_public(identity_file, &comment); |
525 | if (public != NULL) { | |
526 | fp = key_fingerprint(public, fptype, rep); | |
93778882 | 527 | ra = key_fingerprint(public, fptype, SSH_FP_RANDOMART); |
31de76cc | 528 | printf("%u %s %s (%s)\n", key_size(public), fp, comment, |
529 | key_type(public)); | |
639211b7 | 530 | if (log_level >= SYSLOG_LEVEL_VERBOSE) |
531 | printf("%s\n", ra); | |
a306f2dd | 532 | key_free(public); |
fa08c86b | 533 | xfree(comment); |
aff73c5f | 534 | xfree(ra); |
aaf45d87 | 535 | xfree(fp); |
c8d54615 | 536 | exit(0); |
537 | } | |
2b8dc5e3 | 538 | if (comment) { |
aeaa3d9e | 539 | xfree(comment); |
2b8dc5e3 | 540 | comment = NULL; |
541 | } | |
c8d54615 | 542 | |
543 | f = fopen(identity_file, "r"); | |
544 | if (f != NULL) { | |
c8d54615 | 545 | while (fgets(line, sizeof(line), f)) { |
3e2d9453 | 546 | if ((cp = strchr(line, '\n')) == NULL) { |
f8f89bae | 547 | error("line %d too long: %.40s...", |
548 | num + 1, line); | |
c8d54615 | 549 | skip = 1; |
550 | continue; | |
551 | } | |
552 | num++; | |
553 | if (skip) { | |
554 | skip = 0; | |
555 | continue; | |
556 | } | |
3e2d9453 | 557 | *cp = '\0'; |
c8d54615 | 558 | |
559 | /* Skip leading whitespace, empty and comment lines. */ | |
560 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
561 | ; | |
562 | if (!*cp || *cp == '\n' || *cp == '#') | |
4f6e2ba9 | 563 | continue; |
c8d54615 | 564 | i = strtol(cp, &ep, 10); |
565 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
566 | int quoted = 0; | |
567 | comment = cp; | |
512df038 | 568 | for (; *cp && (quoted || (*cp != ' ' && |
569 | *cp != '\t')); cp++) { | |
c8d54615 | 570 | if (*cp == '\\' && cp[1] == '"') |
571 | cp++; /* Skip both */ | |
572 | else if (*cp == '"') | |
573 | quoted = !quoted; | |
574 | } | |
575 | if (!*cp) | |
576 | continue; | |
577 | *cp++ = '\0'; | |
578 | } | |
579 | ep = cp; | |
efcae5b1 | 580 | public = key_new(KEY_RSA1); |
581 | if (key_read(public, &cp) != 1) { | |
582 | cp = ep; | |
583 | key_free(public); | |
584 | public = key_new(KEY_UNSPEC); | |
585 | if (key_read(public, &cp) != 1) { | |
586 | key_free(public); | |
587 | continue; | |
588 | } | |
5260325f | 589 | } |
efcae5b1 | 590 | comment = *cp ? cp : comment; |
aeaa3d9e | 591 | fp = key_fingerprint(public, fptype, rep); |
aff73c5f | 592 | ra = key_fingerprint(public, fptype, SSH_FP_RANDOMART); |
31de76cc | 593 | printf("%u %s %s (%s)\n", key_size(public), fp, |
594 | comment ? comment : "no comment", key_type(public)); | |
639211b7 | 595 | if (log_level >= SYSLOG_LEVEL_VERBOSE) |
596 | printf("%s\n", ra); | |
aff73c5f | 597 | xfree(ra); |
aaf45d87 | 598 | xfree(fp); |
aeaa3d9e | 599 | key_free(public); |
efcae5b1 | 600 | invalid = 0; |
5260325f | 601 | } |
c8d54615 | 602 | fclose(f); |
603 | } | |
604 | if (invalid) { | |
f564d016 | 605 | printf("%s is not a public key file.\n", identity_file); |
c8d54615 | 606 | exit(1); |
5260325f | 607 | } |
5260325f | 608 | exit(0); |
f095fcc7 | 609 | } |
610 | ||
bdffbcdc | 611 | static void |
ccc6beea | 612 | print_host(FILE *f, const char *name, Key *public, int hash) |
bdffbcdc | 613 | { |
048acbeb | 614 | if (print_fingerprint) { |
615 | enum fp_rep rep; | |
616 | enum fp_type fptype; | |
aff73c5f | 617 | char *fp, *ra; |
048acbeb | 618 | |
619 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; | |
620 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
621 | fp = key_fingerprint(public, fptype, rep); | |
aff73c5f | 622 | ra = key_fingerprint(public, fptype, SSH_FP_RANDOMART); |
31de76cc | 623 | printf("%u %s %s (%s)\n%s\n", key_size(public), fp, name, |
624 | key_type(public), ra); | |
aff73c5f | 625 | xfree(ra); |
048acbeb | 626 | xfree(fp); |
627 | } else { | |
628 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
629 | fatal("hash_host failed"); | |
630 | fprintf(f, "%s ", name); | |
631 | if (!key_write(public, f)) | |
632 | fatal("key_write failed"); | |
633 | fprintf(f, "\n"); | |
634 | } | |
bdffbcdc | 635 | } |
636 | ||
637 | static void | |
638 | do_known_hosts(struct passwd *pw, const char *name) | |
639 | { | |
640 | FILE *in, *out = stdout; | |
641 | Key *public; | |
642 | char *cp, *cp2, *kp, *kp2; | |
643 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
f8f89bae | 644 | int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; |
bdffbcdc | 645 | |
646 | if (!have_identity) { | |
647 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
648 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
649 | sizeof(identity_file)) | |
650 | fatal("Specified known hosts path too long"); | |
651 | xfree(cp); | |
652 | have_identity = 1; | |
653 | } | |
654 | if ((in = fopen(identity_file, "r")) == NULL) | |
655 | fatal("fopen: %s", strerror(errno)); | |
656 | ||
657 | /* | |
658 | * Find hosts goes to stdout, hash and deletions happen in-place | |
659 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
660 | */ | |
661 | if (!find_host && (hash_hosts || delete_host)) { | |
662 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
663 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
664 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
665 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
666 | fatal("known_hosts path too long"); | |
667 | umask(077); | |
668 | if ((c = mkstemp(tmp)) == -1) | |
669 | fatal("mkstemp: %s", strerror(errno)); | |
670 | if ((out = fdopen(c, "w")) == NULL) { | |
671 | c = errno; | |
672 | unlink(tmp); | |
673 | fatal("fdopen: %s", strerror(c)); | |
674 | } | |
675 | inplace = 1; | |
676 | } | |
677 | ||
678 | while (fgets(line, sizeof(line), in)) { | |
3e2d9453 | 679 | if ((cp = strchr(line, '\n')) == NULL) { |
f8f89bae | 680 | error("line %d too long: %.40s...", num + 1, line); |
bdffbcdc | 681 | skip = 1; |
682 | invalid = 1; | |
683 | continue; | |
684 | } | |
3e2d9453 | 685 | num++; |
bdffbcdc | 686 | if (skip) { |
687 | skip = 0; | |
688 | continue; | |
689 | } | |
3e2d9453 | 690 | *cp = '\0'; |
bdffbcdc | 691 | |
692 | /* Skip leading whitespace, empty and comment lines. */ | |
693 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
694 | ; | |
695 | if (!*cp || *cp == '\n' || *cp == '#') { | |
696 | if (inplace) | |
697 | fprintf(out, "%s\n", cp); | |
698 | continue; | |
699 | } | |
700 | /* Find the end of the host name portion. */ | |
701 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
702 | ; | |
703 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
704 | error("line %d missing key: %.40s...", | |
705 | num, line); | |
706 | invalid = 1; | |
707 | continue; | |
708 | } | |
709 | *kp++ = '\0'; | |
710 | kp2 = kp; | |
711 | ||
712 | public = key_new(KEY_RSA1); | |
713 | if (key_read(public, &kp) != 1) { | |
714 | kp = kp2; | |
715 | key_free(public); | |
716 | public = key_new(KEY_UNSPEC); | |
717 | if (key_read(public, &kp) != 1) { | |
718 | error("line %d invalid key: %.40s...", | |
719 | num, line); | |
720 | key_free(public); | |
721 | invalid = 1; | |
722 | continue; | |
723 | } | |
724 | } | |
725 | ||
726 | if (*cp == HASH_DELIM) { | |
727 | if (find_host || delete_host) { | |
728 | cp2 = host_hash(name, cp, strlen(cp)); | |
729 | if (cp2 == NULL) { | |
730 | error("line %d: invalid hashed " | |
731 | "name: %.64s...", num, line); | |
732 | invalid = 1; | |
733 | continue; | |
734 | } | |
735 | c = (strcmp(cp2, cp) == 0); | |
736 | if (find_host && c) { | |
737 | printf("# Host %s found: " | |
738 | "line %d type %s\n", name, | |
739 | num, key_type(public)); | |
740 | print_host(out, cp, public, 0); | |
741 | } | |
742 | if (delete_host && !c) | |
743 | print_host(out, cp, public, 0); | |
744 | } else if (hash_hosts) | |
745 | print_host(out, cp, public, 0); | |
746 | } else { | |
747 | if (find_host || delete_host) { | |
748 | c = (match_hostname(name, cp, | |
749 | strlen(cp)) == 1); | |
750 | if (find_host && c) { | |
751 | printf("# Host %s found: " | |
752 | "line %d type %s\n", name, | |
753 | num, key_type(public)); | |
ccc6beea | 754 | print_host(out, name, public, |
755 | hash_hosts); | |
bdffbcdc | 756 | } |
757 | if (delete_host && !c) | |
758 | print_host(out, cp, public, 0); | |
759 | } else if (hash_hosts) { | |
f8cc7664 | 760 | for (cp2 = strsep(&cp, ","); |
bdffbcdc | 761 | cp2 != NULL && *cp2 != '\0'; |
bc7119ba | 762 | cp2 = strsep(&cp, ",")) { |
763 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
764 | fprintf(stderr, "Warning: " | |
765 | "ignoring host name with " | |
766 | "metacharacters: %.64s\n", | |
767 | cp2); | |
768 | else | |
769 | print_host(out, cp2, public, 1); | |
770 | } | |
bdffbcdc | 771 | has_unhashed = 1; |
772 | } | |
773 | } | |
774 | key_free(public); | |
775 | } | |
776 | fclose(in); | |
777 | ||
778 | if (invalid) { | |
f8f89bae | 779 | fprintf(stderr, "%s is not a valid known_hosts file.\n", |
bdffbcdc | 780 | identity_file); |
781 | if (inplace) { | |
782 | fprintf(stderr, "Not replacing existing known_hosts " | |
604dac32 | 783 | "file because of errors\n"); |
bdffbcdc | 784 | fclose(out); |
785 | unlink(tmp); | |
786 | } | |
787 | exit(1); | |
788 | } | |
789 | ||
790 | if (inplace) { | |
791 | fclose(out); | |
792 | ||
793 | /* Backup existing file */ | |
794 | if (unlink(old) == -1 && errno != ENOENT) | |
795 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
796 | if (link(identity_file, old) == -1) | |
797 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
798 | strerror(errno)); | |
799 | /* Move new one into place */ | |
800 | if (rename(tmp, identity_file) == -1) { | |
801 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
802 | strerror(errno)); | |
803 | unlink(tmp); | |
804 | unlink(old); | |
805 | exit(1); | |
806 | } | |
807 | ||
808 | fprintf(stderr, "%s updated.\n", identity_file); | |
809 | fprintf(stderr, "Original contents retained as %s\n", old); | |
810 | if (has_unhashed) { | |
811 | fprintf(stderr, "WARNING: %s contains unhashed " | |
812 | "entries\n", old); | |
813 | fprintf(stderr, "Delete this file to ensure privacy " | |
4e2e5cfd | 814 | "of hostnames\n"); |
bdffbcdc | 815 | } |
816 | } | |
817 | ||
818 | exit(0); | |
819 | } | |
820 | ||
5260325f | 821 | /* |
822 | * Perform changing a passphrase. The argument is the passwd structure | |
823 | * for the current user. | |
824 | */ | |
396c147e | 825 | static void |
f095fcc7 | 826 | do_change_passphrase(struct passwd *pw) |
827 | { | |
5260325f | 828 | char *comment; |
829 | char *old_passphrase, *passphrase1, *passphrase2; | |
830 | struct stat st; | |
a306f2dd | 831 | Key *private; |
5260325f | 832 | |
833 | if (!have_identity) | |
834 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 835 | if (stat(identity_file, &st) < 0) { |
836 | perror(identity_file); | |
837 | exit(1); | |
838 | } | |
5260325f | 839 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 840 | private = key_load_private(identity_file, "", &comment); |
841 | if (private == NULL) { | |
5260325f | 842 | if (identity_passphrase) |
843 | old_passphrase = xstrdup(identity_passphrase); | |
844 | else | |
1843a425 | 845 | old_passphrase = |
846 | read_passphrase("Enter old passphrase: ", | |
847 | RP_ALLOW_STDIN); | |
848 | private = key_load_private(identity_file, old_passphrase, | |
849 | &comment); | |
aeaa3d9e | 850 | memset(old_passphrase, 0, strlen(old_passphrase)); |
851 | xfree(old_passphrase); | |
852 | if (private == NULL) { | |
5260325f | 853 | printf("Bad passphrase.\n"); |
854 | exit(1); | |
855 | } | |
5260325f | 856 | } |
857 | printf("Key has comment '%s'\n", comment); | |
858 | ||
859 | /* Ask the new passphrase (twice). */ | |
860 | if (identity_new_passphrase) { | |
861 | passphrase1 = xstrdup(identity_new_passphrase); | |
862 | passphrase2 = NULL; | |
863 | } else { | |
864 | passphrase1 = | |
1843a425 | 865 | read_passphrase("Enter new passphrase (empty for no " |
866 | "passphrase): ", RP_ALLOW_STDIN); | |
867 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
184eed6a | 868 | RP_ALLOW_STDIN); |
5260325f | 869 | |
870 | /* Verify that they are the same. */ | |
871 | if (strcmp(passphrase1, passphrase2) != 0) { | |
872 | memset(passphrase1, 0, strlen(passphrase1)); | |
873 | memset(passphrase2, 0, strlen(passphrase2)); | |
874 | xfree(passphrase1); | |
875 | xfree(passphrase2); | |
876 | printf("Pass phrases do not match. Try again.\n"); | |
877 | exit(1); | |
878 | } | |
879 | /* Destroy the other copy. */ | |
880 | memset(passphrase2, 0, strlen(passphrase2)); | |
881 | xfree(passphrase2); | |
8efc0c15 | 882 | } |
8efc0c15 | 883 | |
5260325f | 884 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 885 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 886 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 887 | memset(passphrase1, 0, strlen(passphrase1)); |
888 | xfree(passphrase1); | |
a306f2dd | 889 | key_free(private); |
5260325f | 890 | xfree(comment); |
891 | exit(1); | |
892 | } | |
893 | /* Destroy the passphrase and the copy of the key in memory. */ | |
894 | memset(passphrase1, 0, strlen(passphrase1)); | |
895 | xfree(passphrase1); | |
a306f2dd | 896 | key_free(private); /* Destroys contents */ |
5260325f | 897 | xfree(comment); |
898 | ||
899 | printf("Your identification has been saved with the new passphrase.\n"); | |
900 | exit(0); | |
901 | } | |
8efc0c15 | 902 | |
21289cd0 | 903 | /* |
904 | * Print the SSHFP RR. | |
905 | */ | |
3eff92ec | 906 | static int |
907 | do_print_resource_record(struct passwd *pw, char *fname, char *hname) | |
21289cd0 | 908 | { |
909 | Key *public; | |
910 | char *comment = NULL; | |
911 | struct stat st; | |
912 | ||
3eff92ec | 913 | if (fname == NULL) |
21289cd0 | 914 | ask_filename(pw, "Enter file in which the key is"); |
3eff92ec | 915 | if (stat(fname, &st) < 0) { |
916 | if (errno == ENOENT) | |
917 | return 0; | |
918 | perror(fname); | |
21289cd0 | 919 | exit(1); |
920 | } | |
3eff92ec | 921 | public = key_load_public(fname, &comment); |
21289cd0 | 922 | if (public != NULL) { |
ca75d7de | 923 | export_dns_rr(hname, public, stdout, print_generic); |
21289cd0 | 924 | key_free(public); |
925 | xfree(comment); | |
3eff92ec | 926 | return 1; |
21289cd0 | 927 | } |
928 | if (comment) | |
929 | xfree(comment); | |
930 | ||
3eff92ec | 931 | printf("failed to read v2 public key from %s.\n", fname); |
21289cd0 | 932 | exit(1); |
933 | } | |
21289cd0 | 934 | |
5260325f | 935 | /* |
936 | * Change the comment of a private key file. | |
937 | */ | |
396c147e | 938 | static void |
8efc0c15 | 939 | do_change_comment(struct passwd *pw) |
940 | { | |
1c9a907f | 941 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 942 | Key *private; |
943 | Key *public; | |
5260325f | 944 | struct stat st; |
945 | FILE *f; | |
1c9a907f | 946 | int fd; |
5260325f | 947 | |
948 | if (!have_identity) | |
949 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 950 | if (stat(identity_file, &st) < 0) { |
951 | perror(identity_file); | |
952 | exit(1); | |
953 | } | |
aeaa3d9e | 954 | private = key_load_private(identity_file, "", &comment); |
955 | if (private == NULL) { | |
5260325f | 956 | if (identity_passphrase) |
957 | passphrase = xstrdup(identity_passphrase); | |
958 | else if (identity_new_passphrase) | |
959 | passphrase = xstrdup(identity_new_passphrase); | |
960 | else | |
1843a425 | 961 | passphrase = read_passphrase("Enter passphrase: ", |
962 | RP_ALLOW_STDIN); | |
5260325f | 963 | /* Try to load using the passphrase. */ |
aeaa3d9e | 964 | private = key_load_private(identity_file, passphrase, &comment); |
965 | if (private == NULL) { | |
5260325f | 966 | memset(passphrase, 0, strlen(passphrase)); |
967 | xfree(passphrase); | |
968 | printf("Bad passphrase.\n"); | |
969 | exit(1); | |
970 | } | |
aeaa3d9e | 971 | } else { |
972 | passphrase = xstrdup(""); | |
5260325f | 973 | } |
aeaa3d9e | 974 | if (private->type != KEY_RSA1) { |
975 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
976 | key_free(private); | |
977 | exit(1); | |
184eed6a | 978 | } |
5260325f | 979 | printf("Key now has comment '%s'\n", comment); |
980 | ||
981 | if (identity_comment) { | |
982 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
983 | } else { | |
984 | printf("Enter new comment: "); | |
985 | fflush(stdout); | |
986 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
987 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 988 | key_free(private); |
5260325f | 989 | exit(1); |
990 | } | |
b05117ac | 991 | new_comment[strcspn(new_comment, "\n")] = '\0'; |
5260325f | 992 | } |
993 | ||
994 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 995 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
58cfa257 | 996 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 997 | memset(passphrase, 0, strlen(passphrase)); |
998 | xfree(passphrase); | |
a306f2dd | 999 | key_free(private); |
5260325f | 1000 | xfree(comment); |
1001 | exit(1); | |
8efc0c15 | 1002 | } |
5260325f | 1003 | memset(passphrase, 0, strlen(passphrase)); |
1004 | xfree(passphrase); | |
aeaa3d9e | 1005 | public = key_from_private(private); |
a306f2dd | 1006 | key_free(private); |
5260325f | 1007 | |
5260325f | 1008 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1009 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1010 | if (fd == -1) { | |
5260325f | 1011 | printf("Could not save your public key in %s\n", identity_file); |
1012 | exit(1); | |
1013 | } | |
1c9a907f | 1014 | f = fdopen(fd, "w"); |
1015 | if (f == NULL) { | |
1016 | printf("fdopen %s failed", identity_file); | |
1017 | exit(1); | |
1018 | } | |
a306f2dd | 1019 | if (!key_write(public, f)) |
1020 | fprintf(stderr, "write key failed"); | |
1021 | key_free(public); | |
1022 | fprintf(f, " %s\n", new_comment); | |
5260325f | 1023 | fclose(f); |
1024 | ||
1025 | xfree(comment); | |
1026 | ||
1027 | printf("The comment in your key file has been changed.\n"); | |
1028 | exit(0); | |
8efc0c15 | 1029 | } |
1030 | ||
396c147e | 1031 | static void |
5ad13cd7 | 1032 | usage(void) |
1033 | { | |
269cfc8a | 1034 | fprintf(stderr, "usage: %s [options]\n", __progname); |
58153e34 | 1035 | fprintf(stderr, "Options:\n"); |
4feb61af | 1036 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
1037 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
58153e34 | 1038 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
4feb61af | 1039 | fprintf(stderr, " -C comment Provide new comment.\n"); |
58153e34 | 1040 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
4feb61af | 1041 | #ifdef SMARTCARD |
1042 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
1043 | #endif /* SMARTCARD */ | |
e91a8c3f | 1044 | fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n"); |
4feb61af | 1045 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
58153e34 | 1046 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
4feb61af | 1047 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
21289cd0 | 1048 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
4feb61af | 1049 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
e91a8c3f | 1050 | fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n"); |
58153e34 | 1051 | fprintf(stderr, " -l Show fingerprint of key file.\n"); |
4feb61af | 1052 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
58153e34 | 1053 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
1054 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
4feb61af | 1055 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
1056 | fprintf(stderr, " -q Quiet.\n"); | |
1057 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
21289cd0 | 1058 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
4feb61af | 1059 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
1060 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
1061 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
58153e34 | 1062 | #ifdef SMARTCARD |
58153e34 | 1063 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
1064 | #endif /* SMARTCARD */ | |
4feb61af | 1065 | fprintf(stderr, " -v Verbose.\n"); |
1066 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
1067 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
c35a6dc5 | 1068 | |
5260325f | 1069 | exit(1); |
5ad13cd7 | 1070 | } |
1071 | ||
5260325f | 1072 | /* |
1073 | * Main program for key management. | |
1074 | */ | |
8efc0c15 | 1075 | int |
4b4810d4 | 1076 | main(int argc, char **argv) |
8efc0c15 | 1077 | { |
3dc93cd8 | 1078 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
8f52069e | 1079 | char out_file[MAXPATHLEN], *reader_id = NULL; |
bdffbcdc | 1080 | char *rr_hostname = NULL; |
1c9a907f | 1081 | Key *private, *public; |
5260325f | 1082 | struct passwd *pw; |
5260325f | 1083 | struct stat st; |
c784ae09 | 1084 | int opt, type, fd, download = 0; |
2a1995a3 | 1085 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; |
c35a6dc5 | 1086 | int do_gen_candidates = 0, do_screen_candidates = 0; |
1087 | BIGNUM *start = NULL; | |
5260325f | 1088 | FILE *f; |
de4feb6b | 1089 | const char *errstr; |
fa08c86b | 1090 | |
5260325f | 1091 | extern int optind; |
1092 | extern char *optarg; | |
1093 | ||
fd6168c1 | 1094 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1095 | sanitise_stdfd(); | |
1096 | ||
b05ff3f5 | 1097 | __progname = ssh_get_progname(argv[0]); |
264dce47 | 1098 | |
fa649821 | 1099 | SSLeay_add_all_algorithms(); |
4b4810d4 | 1100 | log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
c35a6dc5 | 1101 | |
ce88d9df | 1102 | init_rng(); |
1103 | seed_rng(); | |
a306f2dd | 1104 | |
aa3378df | 1105 | /* we need this for the home * directory. */ |
5260325f | 1106 | pw = getpwuid(getuid()); |
1107 | if (!pw) { | |
1108 | printf("You don't exist, go away!\n"); | |
1109 | exit(1); | |
1110 | } | |
a306f2dd | 1111 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
1112 | perror("gethostname"); | |
1113 | exit(1); | |
1114 | } | |
aa3378df | 1115 | |
4b4810d4 | 1116 | while ((opt = getopt(argc, argv, |
bdffbcdc | 1117 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
5260325f | 1118 | switch (opt) { |
1119 | case 'b': | |
0fe9892f | 1120 | bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr); |
de4feb6b | 1121 | if (errstr) |
1122 | fatal("Bits has bad value %s (%s)", | |
1123 | optarg, errstr); | |
5260325f | 1124 | break; |
bdffbcdc | 1125 | case 'F': |
1126 | find_host = 1; | |
1127 | rr_hostname = optarg; | |
1128 | break; | |
1129 | case 'H': | |
1130 | hash_hosts = 1; | |
1131 | break; | |
1132 | case 'R': | |
1133 | delete_host = 1; | |
1134 | rr_hostname = optarg; | |
1135 | break; | |
5260325f | 1136 | case 'l': |
1137 | print_fingerprint = 1; | |
1138 | break; | |
aaf45d87 | 1139 | case 'B': |
1140 | print_bubblebabble = 1; | |
1141 | break; | |
5260325f | 1142 | case 'p': |
1143 | change_passphrase = 1; | |
1144 | break; | |
5260325f | 1145 | case 'c': |
1146 | change_comment = 1; | |
1147 | break; | |
5260325f | 1148 | case 'f': |
c784ae09 | 1149 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1150 | sizeof(identity_file)) | |
1151 | fatal("Identity filename too long"); | |
5260325f | 1152 | have_identity = 1; |
1153 | break; | |
21289cd0 | 1154 | case 'g': |
1155 | print_generic = 1; | |
1156 | break; | |
5260325f | 1157 | case 'P': |
1158 | identity_passphrase = optarg; | |
1159 | break; | |
5260325f | 1160 | case 'N': |
1161 | identity_new_passphrase = optarg; | |
1162 | break; | |
5260325f | 1163 | case 'C': |
1164 | identity_comment = optarg; | |
1165 | break; | |
5260325f | 1166 | case 'q': |
1167 | quiet = 1; | |
1168 | break; | |
5deceabb | 1169 | case 'e': |
a306f2dd | 1170 | case 'x': |
5deceabb | 1171 | /* export key */ |
a306f2dd | 1172 | convert_to_ssh2 = 1; |
1173 | break; | |
5deceabb | 1174 | case 'i': |
a306f2dd | 1175 | case 'X': |
5deceabb | 1176 | /* import key */ |
a306f2dd | 1177 | convert_from_ssh2 = 1; |
1178 | break; | |
a306f2dd | 1179 | case 'y': |
1180 | print_public = 1; | |
1181 | break; | |
a306f2dd | 1182 | case 'd': |
fa08c86b | 1183 | key_type_name = "dsa"; |
a306f2dd | 1184 | break; |
fa08c86b | 1185 | case 't': |
1186 | key_type_name = optarg; | |
fa08c86b | 1187 | break; |
93a56445 | 1188 | case 'D': |
1189 | download = 1; | |
32596c7b | 1190 | /*FALLTHROUGH*/ |
285d2b15 | 1191 | case 'U': |
93a56445 | 1192 | reader_id = optarg; |
2b30154a | 1193 | break; |
c6fbc95a | 1194 | case 'v': |
1195 | if (log_level == SYSLOG_LEVEL_INFO) | |
1196 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1197 | else { | |
f2107e97 | 1198 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
c6fbc95a | 1199 | log_level < SYSLOG_LEVEL_DEBUG3) |
1200 | log_level++; | |
1201 | } | |
1202 | break; | |
21289cd0 | 1203 | case 'r': |
bdffbcdc | 1204 | rr_hostname = optarg; |
21289cd0 | 1205 | break; |
c35a6dc5 | 1206 | case 'W': |
0fe9892f | 1207 | generator_wanted = (u_int32_t)strtonum(optarg, 1, |
1208 | UINT_MAX, &errstr); | |
c784ae09 | 1209 | if (errstr) |
1210 | fatal("Desired generator has bad value: %s (%s)", | |
1211 | optarg, errstr); | |
c35a6dc5 | 1212 | break; |
1213 | case 'a': | |
0fe9892f | 1214 | trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1215 | if (errstr) |
1216 | fatal("Invalid number of trials: %s (%s)", | |
1217 | optarg, errstr); | |
c35a6dc5 | 1218 | break; |
1219 | case 'M': | |
0fe9892f | 1220 | memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1221 | if (errstr) { |
1222 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1223 | } | |
c35a6dc5 | 1224 | break; |
1225 | case 'G': | |
1226 | do_gen_candidates = 1; | |
c784ae09 | 1227 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1228 | sizeof(out_file)) | |
1229 | fatal("Output filename too long"); | |
c35a6dc5 | 1230 | break; |
1231 | case 'T': | |
1232 | do_screen_candidates = 1; | |
c784ae09 | 1233 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1234 | sizeof(out_file)) | |
1235 | fatal("Output filename too long"); | |
c35a6dc5 | 1236 | break; |
1237 | case 'S': | |
1238 | /* XXX - also compare length against bits */ | |
1239 | if (BN_hex2bn(&start, optarg) == 0) | |
1240 | fatal("Invalid start point."); | |
1241 | break; | |
5260325f | 1242 | case '?': |
1243 | default: | |
1244 | usage(); | |
1245 | } | |
1246 | } | |
c6fbc95a | 1247 | |
1248 | /* reinit */ | |
4b4810d4 | 1249 | log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); |
c6fbc95a | 1250 | |
4b4810d4 | 1251 | if (optind < argc) { |
5260325f | 1252 | printf("Too many arguments.\n"); |
1253 | usage(); | |
1254 | } | |
1255 | if (change_passphrase && change_comment) { | |
1256 | printf("Can only have one of -p and -c.\n"); | |
1257 | usage(); | |
1258 | } | |
048acbeb | 1259 | if (print_fingerprint && (delete_host || hash_hosts)) { |
1260 | printf("Cannot use -l with -D or -R.\n"); | |
1261 | usage(); | |
1262 | } | |
bdffbcdc | 1263 | if (delete_host || hash_hosts || find_host) |
1264 | do_known_hosts(pw, rr_hostname); | |
aaf45d87 | 1265 | if (print_fingerprint || print_bubblebabble) |
5260325f | 1266 | do_fingerprint(pw); |
5260325f | 1267 | if (change_passphrase) |
1268 | do_change_passphrase(pw); | |
633151a3 | 1269 | if (change_comment) |
1270 | do_change_comment(pw); | |
ce88d9df | 1271 | if (convert_to_ssh2) |
1272 | do_convert_to_ssh2(pw); | |
1273 | if (convert_from_ssh2) | |
1274 | do_convert_from_ssh2(pw); | |
a306f2dd | 1275 | if (print_public) |
1276 | do_print_public(pw); | |
bdffbcdc | 1277 | if (rr_hostname != NULL) { |
3eff92ec | 1278 | unsigned int n = 0; |
1279 | ||
1280 | if (have_identity) { | |
1281 | n = do_print_resource_record(pw, | |
1282 | identity_file, rr_hostname); | |
1283 | if (n == 0) { | |
1284 | perror(identity_file); | |
1285 | exit(1); | |
1286 | } | |
1287 | exit(0); | |
1288 | } else { | |
1289 | ||
1290 | n += do_print_resource_record(pw, | |
1291 | _PATH_HOST_RSA_KEY_FILE, rr_hostname); | |
1292 | n += do_print_resource_record(pw, | |
1293 | _PATH_HOST_DSA_KEY_FILE, rr_hostname); | |
1294 | ||
1295 | if (n == 0) | |
1296 | fatal("no keys found."); | |
1297 | exit(0); | |
1298 | } | |
21289cd0 | 1299 | } |
93a56445 | 1300 | if (reader_id != NULL) { |
4f831fd7 | 1301 | #ifdef SMARTCARD |
93a56445 | 1302 | if (download) |
1303 | do_download(pw, reader_id); | |
1304 | else | |
1305 | do_upload(pw, reader_id); | |
3e984472 | 1306 | #else /* SMARTCARD */ |
4f831fd7 | 1307 | fatal("no support for smartcards."); |
3e984472 | 1308 | #endif /* SMARTCARD */ |
93a56445 | 1309 | } |
5260325f | 1310 | |
c35a6dc5 | 1311 | if (do_gen_candidates) { |
1312 | FILE *out = fopen(out_file, "w"); | |
b6453d99 | 1313 | |
c35a6dc5 | 1314 | if (out == NULL) { |
1315 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1316 | out_file, strerror(errno)); | |
1317 | return (1); | |
1318 | } | |
255d3e00 | 1319 | if (bits == 0) |
1320 | bits = DEFAULT_BITS; | |
c35a6dc5 | 1321 | if (gen_candidates(out, memory, bits, start) != 0) |
17318dd6 | 1322 | fatal("modulus candidate generation failed"); |
c35a6dc5 | 1323 | |
1324 | return (0); | |
1325 | } | |
1326 | ||
1327 | if (do_screen_candidates) { | |
1328 | FILE *in; | |
1329 | FILE *out = fopen(out_file, "w"); | |
1330 | ||
1331 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1332 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1333 | fatal("Couldn't open modulus candidate " | |
aff51935 | 1334 | "file \"%s\": %s", identity_file, |
c35a6dc5 | 1335 | strerror(errno)); |
1336 | } | |
1337 | } else | |
1338 | in = stdin; | |
1339 | ||
1340 | if (out == NULL) { | |
1341 | fatal("Couldn't open moduli file \"%s\": %s", | |
1342 | out_file, strerror(errno)); | |
1343 | } | |
1344 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
17318dd6 | 1345 | fatal("modulus screening failed"); |
08d035b6 | 1346 | return (0); |
c35a6dc5 | 1347 | } |
1348 | ||
5260325f | 1349 | arc4random_stir(); |
1350 | ||
882c9d5a | 1351 | if (key_type_name == NULL) |
1352 | key_type_name = "rsa"; | |
1353 | ||
c523303b | 1354 | type = key_type_from_name(key_type_name); |
1355 | if (type == KEY_UNSPEC) { | |
1356 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1357 | exit(1); | |
a306f2dd | 1358 | } |
255d3e00 | 1359 | if (bits == 0) |
1360 | bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; | |
6e94bd72 | 1361 | if (type == KEY_DSA && bits != 1024) |
1362 | fatal("DSA keys must be 1024 bits"); | |
60dc0294 | 1363 | if (!quiet) |
1364 | printf("Generating public/private %s key pair.\n", key_type_name); | |
fa08c86b | 1365 | private = key_generate(type, bits); |
1366 | if (private == NULL) { | |
1367 | fprintf(stderr, "key_generate failed"); | |
1368 | exit(1); | |
1369 | } | |
1370 | public = key_from_private(private); | |
5260325f | 1371 | |
1372 | if (!have_identity) | |
1373 | ask_filename(pw, "Enter file in which to save the key"); | |
1374 | ||
7b9b0103 | 1375 | /* Create ~/.ssh directory if it doesn't already exist. */ |
42f11eb2 | 1376 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 1377 | if (strstr(identity_file, dotsshdir) != NULL && |
1378 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 1379 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 1380 | error("Could not create directory '%s'.", dotsshdir); |
1381 | else if (!quiet) | |
1382 | printf("Created directory '%s'.\n", dotsshdir); | |
1383 | } | |
1384 | /* If the file already exists, ask the user to confirm. */ | |
1385 | if (stat(identity_file, &st) >= 0) { | |
1386 | char yesno[3]; | |
1387 | printf("%s already exists.\n", identity_file); | |
1388 | printf("Overwrite (y/n)? "); | |
1389 | fflush(stdout); | |
1390 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1391 | exit(1); | |
1392 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1393 | exit(1); | |
1394 | } | |
1395 | /* Ask for a passphrase (twice). */ | |
1396 | if (identity_passphrase) | |
1397 | passphrase1 = xstrdup(identity_passphrase); | |
1398 | else if (identity_new_passphrase) | |
1399 | passphrase1 = xstrdup(identity_new_passphrase); | |
1400 | else { | |
1401 | passphrase_again: | |
1402 | passphrase1 = | |
1843a425 | 1403 | read_passphrase("Enter passphrase (empty for no " |
1404 | "passphrase): ", RP_ALLOW_STDIN); | |
1405 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1406 | RP_ALLOW_STDIN); | |
5260325f | 1407 | if (strcmp(passphrase1, passphrase2) != 0) { |
1843a425 | 1408 | /* |
1409 | * The passphrases do not match. Clear them and | |
1410 | * retry. | |
1411 | */ | |
5260325f | 1412 | memset(passphrase1, 0, strlen(passphrase1)); |
1413 | memset(passphrase2, 0, strlen(passphrase2)); | |
1414 | xfree(passphrase1); | |
1415 | xfree(passphrase2); | |
1416 | printf("Passphrases do not match. Try again.\n"); | |
1417 | goto passphrase_again; | |
1418 | } | |
1419 | /* Clear the other copy of the passphrase. */ | |
1420 | memset(passphrase2, 0, strlen(passphrase2)); | |
1421 | xfree(passphrase2); | |
1422 | } | |
1423 | ||
5260325f | 1424 | if (identity_comment) { |
1425 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1426 | } else { | |
6ae2364d | 1427 | /* Create default commend field for the passphrase. */ |
5260325f | 1428 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
1429 | } | |
1430 | ||
1431 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 1432 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 1433 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 1434 | memset(passphrase1, 0, strlen(passphrase1)); |
1435 | xfree(passphrase1); | |
1436 | exit(1); | |
1437 | } | |
1438 | /* Clear the passphrase. */ | |
1439 | memset(passphrase1, 0, strlen(passphrase1)); | |
1440 | xfree(passphrase1); | |
1441 | ||
1442 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 1443 | key_free(private); |
5260325f | 1444 | arc4random_stir(); |
1445 | ||
1446 | if (!quiet) | |
1447 | printf("Your identification has been saved in %s.\n", identity_file); | |
1448 | ||
5260325f | 1449 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1450 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1451 | if (fd == -1) { | |
5260325f | 1452 | printf("Could not save your public key in %s\n", identity_file); |
1453 | exit(1); | |
1454 | } | |
1c9a907f | 1455 | f = fdopen(fd, "w"); |
1456 | if (f == NULL) { | |
1457 | printf("fdopen %s failed", identity_file); | |
1458 | exit(1); | |
1459 | } | |
a306f2dd | 1460 | if (!key_write(public, f)) |
1461 | fprintf(stderr, "write key failed"); | |
1462 | fprintf(f, " %s\n", comment); | |
5260325f | 1463 | fclose(f); |
1464 | ||
1465 | if (!quiet) { | |
22138a36 | 1466 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
aff73c5f | 1467 | char *ra = key_fingerprint(public, SSH_FP_MD5, |
1468 | SSH_FP_RANDOMART); | |
a306f2dd | 1469 | printf("Your public key has been saved in %s.\n", |
1470 | identity_file); | |
5260325f | 1471 | printf("The key fingerprint is:\n"); |
22138a36 | 1472 | printf("%s %s\n", fp, comment); |
aff73c5f | 1473 | printf("The key's randomart image is:\n"); |
1474 | printf("%s\n", ra); | |
1475 | xfree(ra); | |
22138a36 | 1476 | xfree(fp); |
8efc0c15 | 1477 | } |
a306f2dd | 1478 | |
1479 | key_free(public); | |
5260325f | 1480 | exit(0); |
8efc0c15 | 1481 | } |