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c23cfd0d | 1 | /* $OpenBSD: ssh-keygen.c,v 1.176 2010/01/11 10:51:07 djm 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: | |
7eec82ab | 138 | fprintf(stderr, "bad key type\n"); |
8d22d775 | 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; |
c23cfd0d | 184 | char comment[61]; |
a306f2dd | 185 | struct stat st; |
186 | ||
187 | if (!have_identity) | |
188 | ask_filename(pw, "Enter file in which the key is"); | |
189 | if (stat(identity_file, &st) < 0) { | |
190 | perror(identity_file); | |
191 | exit(1); | |
192 | } | |
b587c165 | 193 | if ((k = key_load_public(identity_file, NULL)) == NULL) { |
abe0fb9f | 194 | if ((k = load_identity(identity_file)) == NULL) { |
b587c165 | 195 | fprintf(stderr, "load failed\n"); |
196 | exit(1); | |
197 | } | |
a306f2dd | 198 | } |
3566c73c | 199 | if (k->type == KEY_RSA1) { |
200 | fprintf(stderr, "version 1 keys are not supported\n"); | |
201 | exit(1); | |
202 | } | |
f7436b8c | 203 | if (key_to_blob(k, &blob, &len) <= 0) { |
204 | fprintf(stderr, "key_to_blob failed\n"); | |
205 | exit(1); | |
206 | } | |
c23cfd0d | 207 | /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */ |
208 | snprintf(comment, sizeof(comment), | |
209 | "%u-bit %s, converted by %s@%s from OpenSSH", | |
b587c165 | 210 | key_size(k), key_type(k), |
a306f2dd | 211 | pw->pw_name, hostname); |
c23cfd0d | 212 | |
213 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); | |
214 | fprintf(stdout, "Comment: \"%s\"\n", comment); | |
a306f2dd | 215 | dump_base64(stdout, blob, len); |
94ec8c6b | 216 | fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
b587c165 | 217 | key_free(k); |
a306f2dd | 218 | xfree(blob); |
219 | exit(0); | |
220 | } | |
221 | ||
396c147e | 222 | static void |
94ec8c6b | 223 | buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
224 | { | |
ca75d7de | 225 | u_int bignum_bits = buffer_get_int(b); |
226 | u_int bytes = (bignum_bits + 7) / 8; | |
457fc0c6 | 227 | |
94ec8c6b | 228 | if (buffer_len(b) < bytes) |
457fc0c6 | 229 | fatal("buffer_get_bignum_bits: input buffer too small: " |
230 | "need %d have %d", bytes, buffer_len(b)); | |
e516451d | 231 | if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL) |
232 | fatal("buffer_get_bignum_bits: BN_bin2bn failed"); | |
94ec8c6b | 233 | buffer_consume(b, bytes); |
234 | } | |
235 | ||
396c147e | 236 | static Key * |
c66f9d0e | 237 | do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
94ec8c6b | 238 | { |
239 | Buffer b; | |
94ec8c6b | 240 | Key *key = NULL; |
a599bd06 | 241 | char *type, *cipher; |
d3260e12 | 242 | u_char *sig, data[] = "abcde12345"; |
2e0becb6 | 243 | int magic, rlen, ktype, i1, i2, i3, i4; |
a599bd06 | 244 | u_int slen; |
2e0becb6 | 245 | u_long e; |
94ec8c6b | 246 | |
247 | buffer_init(&b); | |
248 | buffer_append(&b, blob, blen); | |
249 | ||
803c4226 | 250 | magic = buffer_get_int(&b); |
94ec8c6b | 251 | if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { |
252 | error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); | |
253 | buffer_free(&b); | |
254 | return NULL; | |
255 | } | |
2e0becb6 | 256 | i1 = buffer_get_int(&b); |
94ec8c6b | 257 | type = buffer_get_string(&b, NULL); |
258 | cipher = buffer_get_string(&b, NULL); | |
2e0becb6 | 259 | i2 = buffer_get_int(&b); |
260 | i3 = buffer_get_int(&b); | |
261 | i4 = buffer_get_int(&b); | |
4f6e2ba9 | 262 | debug("ignore (%d %d %d %d)", i1, i2, i3, i4); |
94ec8c6b | 263 | if (strcmp(cipher, "none") != 0) { |
264 | error("unsupported cipher %s", cipher); | |
265 | xfree(cipher); | |
266 | buffer_free(&b); | |
457fc0c6 | 267 | xfree(type); |
94ec8c6b | 268 | return NULL; |
269 | } | |
270 | xfree(cipher); | |
271 | ||
457fc0c6 | 272 | if (strstr(type, "dsa")) { |
273 | ktype = KEY_DSA; | |
274 | } else if (strstr(type, "rsa")) { | |
275 | ktype = KEY_RSA; | |
276 | } else { | |
3c460ede | 277 | buffer_free(&b); |
457fc0c6 | 278 | xfree(type); |
94ec8c6b | 279 | return NULL; |
280 | } | |
457fc0c6 | 281 | key = key_new_private(ktype); |
282 | xfree(type); | |
283 | ||
284 | switch (key->type) { | |
285 | case KEY_DSA: | |
286 | buffer_get_bignum_bits(&b, key->dsa->p); | |
287 | buffer_get_bignum_bits(&b, key->dsa->g); | |
288 | buffer_get_bignum_bits(&b, key->dsa->q); | |
289 | buffer_get_bignum_bits(&b, key->dsa->pub_key); | |
290 | buffer_get_bignum_bits(&b, key->dsa->priv_key); | |
291 | break; | |
292 | case KEY_RSA: | |
803c4226 | 293 | e = buffer_get_char(&b); |
2e0becb6 | 294 | debug("e %lx", e); |
295 | if (e < 30) { | |
296 | e <<= 8; | |
297 | e += buffer_get_char(&b); | |
298 | debug("e %lx", e); | |
299 | e <<= 8; | |
300 | e += buffer_get_char(&b); | |
301 | debug("e %lx", e); | |
302 | } | |
303 | if (!BN_set_word(key->rsa->e, e)) { | |
457fc0c6 | 304 | buffer_free(&b); |
305 | key_free(key); | |
306 | return NULL; | |
307 | } | |
308 | buffer_get_bignum_bits(&b, key->rsa->d); | |
309 | buffer_get_bignum_bits(&b, key->rsa->n); | |
310 | buffer_get_bignum_bits(&b, key->rsa->iqmp); | |
311 | buffer_get_bignum_bits(&b, key->rsa->q); | |
312 | buffer_get_bignum_bits(&b, key->rsa->p); | |
2b63e803 | 313 | rsa_generate_additional_parameters(key->rsa); |
457fc0c6 | 314 | break; |
315 | } | |
94ec8c6b | 316 | rlen = buffer_len(&b); |
6aacefa7 | 317 | if (rlen != 0) |
457fc0c6 | 318 | error("do_convert_private_ssh2_from_blob: " |
319 | "remaining bytes in key blob %d", rlen); | |
94ec8c6b | 320 | buffer_free(&b); |
a599bd06 | 321 | |
322 | /* try the key */ | |
323 | key_sign(key, &sig, &slen, data, sizeof(data)); | |
324 | key_verify(key, sig, slen, data, sizeof(data)); | |
325 | xfree(sig); | |
94ec8c6b | 326 | return key; |
327 | } | |
328 | ||
15b81af3 | 329 | static int |
330 | get_line(FILE *fp, char *line, size_t len) | |
331 | { | |
332 | int c; | |
333 | size_t pos = 0; | |
334 | ||
335 | line[0] = '\0'; | |
336 | while ((c = fgetc(fp)) != EOF) { | |
337 | if (pos >= len - 1) { | |
338 | fprintf(stderr, "input line too long.\n"); | |
339 | exit(1); | |
340 | } | |
32596c7b | 341 | switch (c) { |
15b81af3 | 342 | case '\r': |
343 | c = fgetc(fp); | |
344 | if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { | |
345 | fprintf(stderr, "unget: %s\n", strerror(errno)); | |
346 | exit(1); | |
347 | } | |
348 | return pos; | |
349 | case '\n': | |
350 | return pos; | |
351 | } | |
352 | line[pos++] = c; | |
353 | line[pos] = '\0'; | |
354 | } | |
cbaa43c0 | 355 | /* We reached EOF */ |
356 | return -1; | |
15b81af3 | 357 | } |
358 | ||
396c147e | 359 | static void |
a306f2dd | 360 | do_convert_from_ssh2(struct passwd *pw) |
361 | { | |
362 | Key *k; | |
363 | int blen; | |
783dbbdc | 364 | u_int len; |
15b81af3 | 365 | char line[1024]; |
cf54363d | 366 | u_char blob[8096]; |
a306f2dd | 367 | char encoded[8096]; |
368 | struct stat st; | |
94ec8c6b | 369 | int escaped = 0, private = 0, ok; |
a306f2dd | 370 | FILE *fp; |
371 | ||
372 | if (!have_identity) | |
373 | ask_filename(pw, "Enter file in which the key is"); | |
374 | if (stat(identity_file, &st) < 0) { | |
375 | perror(identity_file); | |
376 | exit(1); | |
377 | } | |
378 | fp = fopen(identity_file, "r"); | |
379 | if (fp == NULL) { | |
380 | perror(identity_file); | |
381 | exit(1); | |
382 | } | |
383 | encoded[0] = '\0'; | |
15b81af3 | 384 | while ((blen = get_line(fp, line, sizeof(line))) != -1) { |
385 | if (line[blen - 1] == '\\') | |
d0c832f3 | 386 | escaped++; |
a306f2dd | 387 | if (strncmp(line, "----", 4) == 0 || |
388 | strstr(line, ": ") != NULL) { | |
94ec8c6b | 389 | if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
390 | private = 1; | |
a599bd06 | 391 | if (strstr(line, " END ") != NULL) { |
392 | break; | |
393 | } | |
012bc0e1 | 394 | /* fprintf(stderr, "ignore: %s", line); */ |
a306f2dd | 395 | continue; |
396 | } | |
d0c832f3 | 397 | if (escaped) { |
398 | escaped--; | |
012bc0e1 | 399 | /* fprintf(stderr, "escaped: %s", line); */ |
d0c832f3 | 400 | continue; |
a306f2dd | 401 | } |
a306f2dd | 402 | strlcat(encoded, line, sizeof(encoded)); |
403 | } | |
783dbbdc | 404 | len = strlen(encoded); |
405 | if (((len % 4) == 3) && | |
406 | (encoded[len-1] == '=') && | |
407 | (encoded[len-2] == '=') && | |
408 | (encoded[len-3] == '=')) | |
409 | encoded[len-3] = '\0'; | |
e6207598 | 410 | blen = uudecode(encoded, blob, sizeof(blob)); |
a306f2dd | 411 | if (blen < 0) { |
412 | fprintf(stderr, "uudecode failed.\n"); | |
413 | exit(1); | |
414 | } | |
94ec8c6b | 415 | k = private ? |
416 | do_convert_private_ssh2_from_blob(blob, blen) : | |
fa08c86b | 417 | key_from_blob(blob, blen); |
94ec8c6b | 418 | if (k == NULL) { |
419 | fprintf(stderr, "decode blob failed.\n"); | |
420 | exit(1); | |
421 | } | |
422 | ok = private ? | |
457fc0c6 | 423 | (k->type == KEY_DSA ? |
424 | PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : | |
425 | PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : | |
94ec8c6b | 426 | key_write(k, stdout); |
427 | if (!ok) { | |
7eec82ab | 428 | fprintf(stderr, "key write failed\n"); |
94ec8c6b | 429 | exit(1); |
430 | } | |
a306f2dd | 431 | key_free(k); |
4ccb828d | 432 | if (!private) |
433 | fprintf(stdout, "\n"); | |
a306f2dd | 434 | fclose(fp); |
435 | exit(0); | |
436 | } | |
437 | ||
396c147e | 438 | static void |
a306f2dd | 439 | do_print_public(struct passwd *pw) |
440 | { | |
aeaa3d9e | 441 | Key *prv; |
a306f2dd | 442 | struct stat st; |
443 | ||
444 | if (!have_identity) | |
445 | ask_filename(pw, "Enter file in which the key is"); | |
446 | if (stat(identity_file, &st) < 0) { | |
447 | perror(identity_file); | |
448 | exit(1); | |
449 | } | |
abe0fb9f | 450 | prv = load_identity(identity_file); |
aeaa3d9e | 451 | if (prv == NULL) { |
a306f2dd | 452 | fprintf(stderr, "load failed\n"); |
453 | exit(1); | |
454 | } | |
aeaa3d9e | 455 | if (!key_write(prv, stdout)) |
a306f2dd | 456 | fprintf(stderr, "key_write failed"); |
aeaa3d9e | 457 | key_free(prv); |
a306f2dd | 458 | fprintf(stdout, "\n"); |
459 | exit(0); | |
460 | } | |
461 | ||
4f831fd7 | 462 | #ifdef SMARTCARD |
2b30154a | 463 | static void |
93a56445 | 464 | do_upload(struct passwd *pw, const char *sc_reader_id) |
2b30154a | 465 | { |
2b30154a | 466 | Key *prv = NULL; |
467 | struct stat st; | |
b9f62352 | 468 | int ret; |
469 | ||
2b30154a | 470 | if (!have_identity) |
471 | ask_filename(pw, "Enter file in which the key is"); | |
472 | if (stat(identity_file, &st) < 0) { | |
473 | perror(identity_file); | |
b9f62352 | 474 | exit(1); |
2b30154a | 475 | } |
476 | prv = load_identity(identity_file); | |
477 | if (prv == NULL) { | |
478 | error("load failed"); | |
b9f62352 | 479 | exit(1); |
49ccba9c | 480 | } |
b9f62352 | 481 | ret = sc_put_key(prv, sc_reader_id); |
482 | key_free(prv); | |
483 | if (ret < 0) | |
484 | exit(1); | |
bbe88b6d | 485 | logit("loading key done"); |
b9f62352 | 486 | exit(0); |
2b30154a | 487 | } |
93a56445 | 488 | |
489 | static void | |
490 | do_download(struct passwd *pw, const char *sc_reader_id) | |
491 | { | |
0659cace | 492 | Key **keys = NULL; |
493 | int i; | |
93a56445 | 494 | |
0659cace | 495 | keys = sc_get_keys(sc_reader_id, NULL); |
496 | if (keys == NULL) | |
93a56445 | 497 | fatal("cannot read public key from smartcard"); |
0659cace | 498 | for (i = 0; keys[i]; i++) { |
499 | key_write(keys[i], stdout); | |
500 | key_free(keys[i]); | |
501 | fprintf(stdout, "\n"); | |
502 | } | |
503 | xfree(keys); | |
93a56445 | 504 | exit(0); |
505 | } | |
3e984472 | 506 | #endif /* SMARTCARD */ |
2b30154a | 507 | |
396c147e | 508 | static void |
f095fcc7 | 509 | do_fingerprint(struct passwd *pw) |
510 | { | |
c8d54615 | 511 | FILE *f; |
a306f2dd | 512 | Key *public; |
aff73c5f | 513 | char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra; |
f8f89bae | 514 | int i, skip = 0, num = 0, invalid = 1; |
17a3011c | 515 | enum fp_rep rep; |
516 | enum fp_type fptype; | |
5260325f | 517 | struct stat st; |
518 | ||
aeaa3d9e | 519 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
520 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
aaf45d87 | 521 | |
5260325f | 522 | if (!have_identity) |
523 | ask_filename(pw, "Enter file in which the key is"); | |
524 | if (stat(identity_file, &st) < 0) { | |
525 | perror(identity_file); | |
526 | exit(1); | |
527 | } | |
aeaa3d9e | 528 | public = key_load_public(identity_file, &comment); |
529 | if (public != NULL) { | |
530 | fp = key_fingerprint(public, fptype, rep); | |
bf3290be | 531 | ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART); |
31de76cc | 532 | printf("%u %s %s (%s)\n", key_size(public), fp, comment, |
533 | key_type(public)); | |
639211b7 | 534 | if (log_level >= SYSLOG_LEVEL_VERBOSE) |
535 | printf("%s\n", ra); | |
a306f2dd | 536 | key_free(public); |
fa08c86b | 537 | xfree(comment); |
aff73c5f | 538 | xfree(ra); |
aaf45d87 | 539 | xfree(fp); |
c8d54615 | 540 | exit(0); |
541 | } | |
2b8dc5e3 | 542 | if (comment) { |
aeaa3d9e | 543 | xfree(comment); |
2b8dc5e3 | 544 | comment = NULL; |
545 | } | |
c8d54615 | 546 | |
547 | f = fopen(identity_file, "r"); | |
548 | if (f != NULL) { | |
c8d54615 | 549 | while (fgets(line, sizeof(line), f)) { |
3e2d9453 | 550 | if ((cp = strchr(line, '\n')) == NULL) { |
f8f89bae | 551 | error("line %d too long: %.40s...", |
552 | num + 1, line); | |
c8d54615 | 553 | skip = 1; |
554 | continue; | |
555 | } | |
556 | num++; | |
557 | if (skip) { | |
558 | skip = 0; | |
559 | continue; | |
560 | } | |
3e2d9453 | 561 | *cp = '\0'; |
c8d54615 | 562 | |
563 | /* Skip leading whitespace, empty and comment lines. */ | |
564 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
565 | ; | |
566 | if (!*cp || *cp == '\n' || *cp == '#') | |
4f6e2ba9 | 567 | continue; |
c8d54615 | 568 | i = strtol(cp, &ep, 10); |
569 | if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { | |
570 | int quoted = 0; | |
571 | comment = cp; | |
512df038 | 572 | for (; *cp && (quoted || (*cp != ' ' && |
573 | *cp != '\t')); cp++) { | |
c8d54615 | 574 | if (*cp == '\\' && cp[1] == '"') |
575 | cp++; /* Skip both */ | |
576 | else if (*cp == '"') | |
577 | quoted = !quoted; | |
578 | } | |
579 | if (!*cp) | |
580 | continue; | |
581 | *cp++ = '\0'; | |
582 | } | |
583 | ep = cp; | |
efcae5b1 | 584 | public = key_new(KEY_RSA1); |
585 | if (key_read(public, &cp) != 1) { | |
586 | cp = ep; | |
587 | key_free(public); | |
588 | public = key_new(KEY_UNSPEC); | |
589 | if (key_read(public, &cp) != 1) { | |
590 | key_free(public); | |
591 | continue; | |
592 | } | |
5260325f | 593 | } |
efcae5b1 | 594 | comment = *cp ? cp : comment; |
aeaa3d9e | 595 | fp = key_fingerprint(public, fptype, rep); |
bf3290be | 596 | ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART); |
31de76cc | 597 | printf("%u %s %s (%s)\n", key_size(public), fp, |
598 | comment ? comment : "no comment", key_type(public)); | |
639211b7 | 599 | if (log_level >= SYSLOG_LEVEL_VERBOSE) |
600 | printf("%s\n", ra); | |
aff73c5f | 601 | xfree(ra); |
aaf45d87 | 602 | xfree(fp); |
aeaa3d9e | 603 | key_free(public); |
efcae5b1 | 604 | invalid = 0; |
5260325f | 605 | } |
c8d54615 | 606 | fclose(f); |
607 | } | |
608 | if (invalid) { | |
f564d016 | 609 | printf("%s is not a public key file.\n", identity_file); |
c8d54615 | 610 | exit(1); |
5260325f | 611 | } |
5260325f | 612 | exit(0); |
f095fcc7 | 613 | } |
614 | ||
bdffbcdc | 615 | static void |
ccc6beea | 616 | print_host(FILE *f, const char *name, Key *public, int hash) |
bdffbcdc | 617 | { |
048acbeb | 618 | if (print_fingerprint) { |
619 | enum fp_rep rep; | |
620 | enum fp_type fptype; | |
aff73c5f | 621 | char *fp, *ra; |
048acbeb | 622 | |
623 | fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; | |
624 | rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; | |
625 | fp = key_fingerprint(public, fptype, rep); | |
bf3290be | 626 | ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART); |
322b3f02 | 627 | printf("%u %s %s (%s)\n", key_size(public), fp, name, |
628 | key_type(public)); | |
629 | if (log_level >= SYSLOG_LEVEL_VERBOSE) | |
630 | printf("%s\n", ra); | |
aff73c5f | 631 | xfree(ra); |
048acbeb | 632 | xfree(fp); |
633 | } else { | |
634 | if (hash && (name = host_hash(name, NULL, 0)) == NULL) | |
635 | fatal("hash_host failed"); | |
636 | fprintf(f, "%s ", name); | |
637 | if (!key_write(public, f)) | |
638 | fatal("key_write failed"); | |
639 | fprintf(f, "\n"); | |
640 | } | |
bdffbcdc | 641 | } |
642 | ||
643 | static void | |
644 | do_known_hosts(struct passwd *pw, const char *name) | |
645 | { | |
646 | FILE *in, *out = stdout; | |
647 | Key *public; | |
648 | char *cp, *cp2, *kp, *kp2; | |
649 | char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; | |
f8f89bae | 650 | int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; |
bdffbcdc | 651 | |
652 | if (!have_identity) { | |
653 | cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); | |
654 | if (strlcpy(identity_file, cp, sizeof(identity_file)) >= | |
655 | sizeof(identity_file)) | |
656 | fatal("Specified known hosts path too long"); | |
657 | xfree(cp); | |
658 | have_identity = 1; | |
659 | } | |
660 | if ((in = fopen(identity_file, "r")) == NULL) | |
661 | fatal("fopen: %s", strerror(errno)); | |
662 | ||
663 | /* | |
664 | * Find hosts goes to stdout, hash and deletions happen in-place | |
665 | * A corner case is ssh-keygen -HF foo, which should go to stdout | |
666 | */ | |
667 | if (!find_host && (hash_hosts || delete_host)) { | |
668 | if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || | |
669 | strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || | |
670 | strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || | |
671 | strlcat(old, ".old", sizeof(old)) >= sizeof(old)) | |
672 | fatal("known_hosts path too long"); | |
673 | umask(077); | |
674 | if ((c = mkstemp(tmp)) == -1) | |
675 | fatal("mkstemp: %s", strerror(errno)); | |
676 | if ((out = fdopen(c, "w")) == NULL) { | |
677 | c = errno; | |
678 | unlink(tmp); | |
679 | fatal("fdopen: %s", strerror(c)); | |
680 | } | |
681 | inplace = 1; | |
682 | } | |
683 | ||
684 | while (fgets(line, sizeof(line), in)) { | |
3e2d9453 | 685 | if ((cp = strchr(line, '\n')) == NULL) { |
f8f89bae | 686 | error("line %d too long: %.40s...", num + 1, line); |
bdffbcdc | 687 | skip = 1; |
688 | invalid = 1; | |
689 | continue; | |
690 | } | |
3e2d9453 | 691 | num++; |
bdffbcdc | 692 | if (skip) { |
693 | skip = 0; | |
694 | continue; | |
695 | } | |
3e2d9453 | 696 | *cp = '\0'; |
bdffbcdc | 697 | |
698 | /* Skip leading whitespace, empty and comment lines. */ | |
699 | for (cp = line; *cp == ' ' || *cp == '\t'; cp++) | |
700 | ; | |
701 | if (!*cp || *cp == '\n' || *cp == '#') { | |
702 | if (inplace) | |
703 | fprintf(out, "%s\n", cp); | |
704 | continue; | |
705 | } | |
706 | /* Find the end of the host name portion. */ | |
707 | for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) | |
708 | ; | |
709 | if (*kp == '\0' || *(kp + 1) == '\0') { | |
710 | error("line %d missing key: %.40s...", | |
711 | num, line); | |
712 | invalid = 1; | |
713 | continue; | |
714 | } | |
715 | *kp++ = '\0'; | |
716 | kp2 = kp; | |
717 | ||
718 | public = key_new(KEY_RSA1); | |
719 | if (key_read(public, &kp) != 1) { | |
720 | kp = kp2; | |
721 | key_free(public); | |
722 | public = key_new(KEY_UNSPEC); | |
723 | if (key_read(public, &kp) != 1) { | |
724 | error("line %d invalid key: %.40s...", | |
725 | num, line); | |
726 | key_free(public); | |
727 | invalid = 1; | |
728 | continue; | |
729 | } | |
730 | } | |
731 | ||
732 | if (*cp == HASH_DELIM) { | |
733 | if (find_host || delete_host) { | |
734 | cp2 = host_hash(name, cp, strlen(cp)); | |
735 | if (cp2 == NULL) { | |
736 | error("line %d: invalid hashed " | |
737 | "name: %.64s...", num, line); | |
738 | invalid = 1; | |
739 | continue; | |
740 | } | |
741 | c = (strcmp(cp2, cp) == 0); | |
742 | if (find_host && c) { | |
743 | printf("# Host %s found: " | |
744 | "line %d type %s\n", name, | |
745 | num, key_type(public)); | |
746 | print_host(out, cp, public, 0); | |
747 | } | |
748 | if (delete_host && !c) | |
749 | print_host(out, cp, public, 0); | |
750 | } else if (hash_hosts) | |
751 | print_host(out, cp, public, 0); | |
752 | } else { | |
753 | if (find_host || delete_host) { | |
754 | c = (match_hostname(name, cp, | |
755 | strlen(cp)) == 1); | |
756 | if (find_host && c) { | |
757 | printf("# Host %s found: " | |
758 | "line %d type %s\n", name, | |
759 | num, key_type(public)); | |
ccc6beea | 760 | print_host(out, name, public, |
761 | hash_hosts); | |
bdffbcdc | 762 | } |
763 | if (delete_host && !c) | |
764 | print_host(out, cp, public, 0); | |
765 | } else if (hash_hosts) { | |
f8cc7664 | 766 | for (cp2 = strsep(&cp, ","); |
bdffbcdc | 767 | cp2 != NULL && *cp2 != '\0'; |
bc7119ba | 768 | cp2 = strsep(&cp, ",")) { |
769 | if (strcspn(cp2, "*?!") != strlen(cp2)) | |
770 | fprintf(stderr, "Warning: " | |
771 | "ignoring host name with " | |
772 | "metacharacters: %.64s\n", | |
773 | cp2); | |
774 | else | |
775 | print_host(out, cp2, public, 1); | |
776 | } | |
bdffbcdc | 777 | has_unhashed = 1; |
778 | } | |
779 | } | |
780 | key_free(public); | |
781 | } | |
782 | fclose(in); | |
783 | ||
784 | if (invalid) { | |
f8f89bae | 785 | fprintf(stderr, "%s is not a valid known_hosts file.\n", |
bdffbcdc | 786 | identity_file); |
787 | if (inplace) { | |
788 | fprintf(stderr, "Not replacing existing known_hosts " | |
604dac32 | 789 | "file because of errors\n"); |
bdffbcdc | 790 | fclose(out); |
791 | unlink(tmp); | |
792 | } | |
793 | exit(1); | |
794 | } | |
795 | ||
796 | if (inplace) { | |
797 | fclose(out); | |
798 | ||
799 | /* Backup existing file */ | |
800 | if (unlink(old) == -1 && errno != ENOENT) | |
801 | fatal("unlink %.100s: %s", old, strerror(errno)); | |
802 | if (link(identity_file, old) == -1) | |
803 | fatal("link %.100s to %.100s: %s", identity_file, old, | |
804 | strerror(errno)); | |
805 | /* Move new one into place */ | |
806 | if (rename(tmp, identity_file) == -1) { | |
807 | error("rename\"%s\" to \"%s\": %s", tmp, identity_file, | |
808 | strerror(errno)); | |
809 | unlink(tmp); | |
810 | unlink(old); | |
811 | exit(1); | |
812 | } | |
813 | ||
814 | fprintf(stderr, "%s updated.\n", identity_file); | |
815 | fprintf(stderr, "Original contents retained as %s\n", old); | |
816 | if (has_unhashed) { | |
817 | fprintf(stderr, "WARNING: %s contains unhashed " | |
818 | "entries\n", old); | |
819 | fprintf(stderr, "Delete this file to ensure privacy " | |
4e2e5cfd | 820 | "of hostnames\n"); |
bdffbcdc | 821 | } |
822 | } | |
823 | ||
824 | exit(0); | |
825 | } | |
826 | ||
5260325f | 827 | /* |
828 | * Perform changing a passphrase. The argument is the passwd structure | |
829 | * for the current user. | |
830 | */ | |
396c147e | 831 | static void |
f095fcc7 | 832 | do_change_passphrase(struct passwd *pw) |
833 | { | |
5260325f | 834 | char *comment; |
835 | char *old_passphrase, *passphrase1, *passphrase2; | |
836 | struct stat st; | |
a306f2dd | 837 | Key *private; |
5260325f | 838 | |
839 | if (!have_identity) | |
840 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 841 | if (stat(identity_file, &st) < 0) { |
842 | perror(identity_file); | |
843 | exit(1); | |
844 | } | |
5260325f | 845 | /* Try to load the file with empty passphrase. */ |
aeaa3d9e | 846 | private = key_load_private(identity_file, "", &comment); |
847 | if (private == NULL) { | |
5260325f | 848 | if (identity_passphrase) |
849 | old_passphrase = xstrdup(identity_passphrase); | |
850 | else | |
1843a425 | 851 | old_passphrase = |
852 | read_passphrase("Enter old passphrase: ", | |
853 | RP_ALLOW_STDIN); | |
854 | private = key_load_private(identity_file, old_passphrase, | |
855 | &comment); | |
aeaa3d9e | 856 | memset(old_passphrase, 0, strlen(old_passphrase)); |
857 | xfree(old_passphrase); | |
858 | if (private == NULL) { | |
5260325f | 859 | printf("Bad passphrase.\n"); |
860 | exit(1); | |
861 | } | |
5260325f | 862 | } |
863 | printf("Key has comment '%s'\n", comment); | |
864 | ||
865 | /* Ask the new passphrase (twice). */ | |
866 | if (identity_new_passphrase) { | |
867 | passphrase1 = xstrdup(identity_new_passphrase); | |
868 | passphrase2 = NULL; | |
869 | } else { | |
870 | passphrase1 = | |
1843a425 | 871 | read_passphrase("Enter new passphrase (empty for no " |
872 | "passphrase): ", RP_ALLOW_STDIN); | |
873 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
184eed6a | 874 | RP_ALLOW_STDIN); |
5260325f | 875 | |
876 | /* Verify that they are the same. */ | |
877 | if (strcmp(passphrase1, passphrase2) != 0) { | |
878 | memset(passphrase1, 0, strlen(passphrase1)); | |
879 | memset(passphrase2, 0, strlen(passphrase2)); | |
880 | xfree(passphrase1); | |
881 | xfree(passphrase2); | |
882 | printf("Pass phrases do not match. Try again.\n"); | |
883 | exit(1); | |
884 | } | |
885 | /* Destroy the other copy. */ | |
886 | memset(passphrase2, 0, strlen(passphrase2)); | |
887 | xfree(passphrase2); | |
8efc0c15 | 888 | } |
8efc0c15 | 889 | |
5260325f | 890 | /* Save the file using the new passphrase. */ |
aeaa3d9e | 891 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 892 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 893 | memset(passphrase1, 0, strlen(passphrase1)); |
894 | xfree(passphrase1); | |
a306f2dd | 895 | key_free(private); |
5260325f | 896 | xfree(comment); |
897 | exit(1); | |
898 | } | |
899 | /* Destroy the passphrase and the copy of the key in memory. */ | |
900 | memset(passphrase1, 0, strlen(passphrase1)); | |
901 | xfree(passphrase1); | |
a306f2dd | 902 | key_free(private); /* Destroys contents */ |
5260325f | 903 | xfree(comment); |
904 | ||
905 | printf("Your identification has been saved with the new passphrase.\n"); | |
906 | exit(0); | |
907 | } | |
8efc0c15 | 908 | |
21289cd0 | 909 | /* |
910 | * Print the SSHFP RR. | |
911 | */ | |
3eff92ec | 912 | static int |
913 | do_print_resource_record(struct passwd *pw, char *fname, char *hname) | |
21289cd0 | 914 | { |
915 | Key *public; | |
916 | char *comment = NULL; | |
917 | struct stat st; | |
918 | ||
3eff92ec | 919 | if (fname == NULL) |
21289cd0 | 920 | ask_filename(pw, "Enter file in which the key is"); |
3eff92ec | 921 | if (stat(fname, &st) < 0) { |
922 | if (errno == ENOENT) | |
923 | return 0; | |
924 | perror(fname); | |
21289cd0 | 925 | exit(1); |
926 | } | |
3eff92ec | 927 | public = key_load_public(fname, &comment); |
21289cd0 | 928 | if (public != NULL) { |
ca75d7de | 929 | export_dns_rr(hname, public, stdout, print_generic); |
21289cd0 | 930 | key_free(public); |
931 | xfree(comment); | |
3eff92ec | 932 | return 1; |
21289cd0 | 933 | } |
934 | if (comment) | |
935 | xfree(comment); | |
936 | ||
3eff92ec | 937 | printf("failed to read v2 public key from %s.\n", fname); |
21289cd0 | 938 | exit(1); |
939 | } | |
21289cd0 | 940 | |
5260325f | 941 | /* |
942 | * Change the comment of a private key file. | |
943 | */ | |
396c147e | 944 | static void |
8efc0c15 | 945 | do_change_comment(struct passwd *pw) |
946 | { | |
1c9a907f | 947 | char new_comment[1024], *comment, *passphrase; |
aeaa3d9e | 948 | Key *private; |
949 | Key *public; | |
5260325f | 950 | struct stat st; |
951 | FILE *f; | |
1c9a907f | 952 | int fd; |
5260325f | 953 | |
954 | if (!have_identity) | |
955 | ask_filename(pw, "Enter file in which the key is"); | |
5260325f | 956 | if (stat(identity_file, &st) < 0) { |
957 | perror(identity_file); | |
958 | exit(1); | |
959 | } | |
aeaa3d9e | 960 | private = key_load_private(identity_file, "", &comment); |
961 | if (private == NULL) { | |
5260325f | 962 | if (identity_passphrase) |
963 | passphrase = xstrdup(identity_passphrase); | |
964 | else if (identity_new_passphrase) | |
965 | passphrase = xstrdup(identity_new_passphrase); | |
966 | else | |
1843a425 | 967 | passphrase = read_passphrase("Enter passphrase: ", |
968 | RP_ALLOW_STDIN); | |
5260325f | 969 | /* Try to load using the passphrase. */ |
aeaa3d9e | 970 | private = key_load_private(identity_file, passphrase, &comment); |
971 | if (private == NULL) { | |
5260325f | 972 | memset(passphrase, 0, strlen(passphrase)); |
973 | xfree(passphrase); | |
974 | printf("Bad passphrase.\n"); | |
975 | exit(1); | |
976 | } | |
aeaa3d9e | 977 | } else { |
978 | passphrase = xstrdup(""); | |
5260325f | 979 | } |
aeaa3d9e | 980 | if (private->type != KEY_RSA1) { |
981 | fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); | |
982 | key_free(private); | |
983 | exit(1); | |
184eed6a | 984 | } |
5260325f | 985 | printf("Key now has comment '%s'\n", comment); |
986 | ||
987 | if (identity_comment) { | |
988 | strlcpy(new_comment, identity_comment, sizeof(new_comment)); | |
989 | } else { | |
990 | printf("Enter new comment: "); | |
991 | fflush(stdout); | |
992 | if (!fgets(new_comment, sizeof(new_comment), stdin)) { | |
993 | memset(passphrase, 0, strlen(passphrase)); | |
a306f2dd | 994 | key_free(private); |
5260325f | 995 | exit(1); |
996 | } | |
b05117ac | 997 | new_comment[strcspn(new_comment, "\n")] = '\0'; |
5260325f | 998 | } |
999 | ||
1000 | /* Save the file using the new passphrase. */ | |
aeaa3d9e | 1001 | if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
58cfa257 | 1002 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 1003 | memset(passphrase, 0, strlen(passphrase)); |
1004 | xfree(passphrase); | |
a306f2dd | 1005 | key_free(private); |
5260325f | 1006 | xfree(comment); |
1007 | exit(1); | |
8efc0c15 | 1008 | } |
5260325f | 1009 | memset(passphrase, 0, strlen(passphrase)); |
1010 | xfree(passphrase); | |
aeaa3d9e | 1011 | public = key_from_private(private); |
a306f2dd | 1012 | key_free(private); |
5260325f | 1013 | |
5260325f | 1014 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1015 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1016 | if (fd == -1) { | |
5260325f | 1017 | printf("Could not save your public key in %s\n", identity_file); |
1018 | exit(1); | |
1019 | } | |
1c9a907f | 1020 | f = fdopen(fd, "w"); |
1021 | if (f == NULL) { | |
7eec82ab | 1022 | printf("fdopen %s failed\n", identity_file); |
1c9a907f | 1023 | exit(1); |
1024 | } | |
a306f2dd | 1025 | if (!key_write(public, f)) |
7eec82ab | 1026 | fprintf(stderr, "write key failed\n"); |
a306f2dd | 1027 | key_free(public); |
1028 | fprintf(f, " %s\n", new_comment); | |
5260325f | 1029 | fclose(f); |
1030 | ||
1031 | xfree(comment); | |
1032 | ||
1033 | printf("The comment in your key file has been changed.\n"); | |
1034 | exit(0); | |
8efc0c15 | 1035 | } |
1036 | ||
396c147e | 1037 | static void |
5ad13cd7 | 1038 | usage(void) |
1039 | { | |
269cfc8a | 1040 | fprintf(stderr, "usage: %s [options]\n", __progname); |
58153e34 | 1041 | fprintf(stderr, "Options:\n"); |
4feb61af | 1042 | fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
1043 | fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); | |
58153e34 | 1044 | fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
4feb61af | 1045 | fprintf(stderr, " -C comment Provide new comment.\n"); |
58153e34 | 1046 | fprintf(stderr, " -c Change comment in private and public key files.\n"); |
4feb61af | 1047 | #ifdef SMARTCARD |
1048 | fprintf(stderr, " -D reader Download public key from smartcard.\n"); | |
1049 | #endif /* SMARTCARD */ | |
e91a8c3f | 1050 | fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n"); |
4feb61af | 1051 | fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
58153e34 | 1052 | fprintf(stderr, " -f filename Filename of the key file.\n"); |
4feb61af | 1053 | fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
21289cd0 | 1054 | fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
4feb61af | 1055 | fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
e91a8c3f | 1056 | fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n"); |
58153e34 | 1057 | fprintf(stderr, " -l Show fingerprint of key file.\n"); |
4feb61af | 1058 | fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
58153e34 | 1059 | fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
1060 | fprintf(stderr, " -P phrase Provide old passphrase.\n"); | |
4feb61af | 1061 | fprintf(stderr, " -p Change passphrase of private key file.\n"); |
1062 | fprintf(stderr, " -q Quiet.\n"); | |
1063 | fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); | |
21289cd0 | 1064 | fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
4feb61af | 1065 | fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
1066 | fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); | |
1067 | fprintf(stderr, " -t type Specify type of key to create.\n"); | |
58153e34 | 1068 | #ifdef SMARTCARD |
58153e34 | 1069 | fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
1070 | #endif /* SMARTCARD */ | |
4feb61af | 1071 | fprintf(stderr, " -v Verbose.\n"); |
1072 | fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); | |
1073 | fprintf(stderr, " -y Read private key file and print public key.\n"); | |
c35a6dc5 | 1074 | |
5260325f | 1075 | exit(1); |
5ad13cd7 | 1076 | } |
1077 | ||
5260325f | 1078 | /* |
1079 | * Main program for key management. | |
1080 | */ | |
8efc0c15 | 1081 | int |
4b4810d4 | 1082 | main(int argc, char **argv) |
8efc0c15 | 1083 | { |
3dc93cd8 | 1084 | char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
8f52069e | 1085 | char out_file[MAXPATHLEN], *reader_id = NULL; |
bdffbcdc | 1086 | char *rr_hostname = NULL; |
1c9a907f | 1087 | Key *private, *public; |
5260325f | 1088 | struct passwd *pw; |
5260325f | 1089 | struct stat st; |
c784ae09 | 1090 | int opt, type, fd, download = 0; |
2a1995a3 | 1091 | u_int32_t memory = 0, generator_wanted = 0, trials = 100; |
c35a6dc5 | 1092 | int do_gen_candidates = 0, do_screen_candidates = 0; |
1093 | BIGNUM *start = NULL; | |
5260325f | 1094 | FILE *f; |
de4feb6b | 1095 | const char *errstr; |
fa08c86b | 1096 | |
5260325f | 1097 | extern int optind; |
1098 | extern char *optarg; | |
1099 | ||
fd6168c1 | 1100 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1101 | sanitise_stdfd(); | |
1102 | ||
b05ff3f5 | 1103 | __progname = ssh_get_progname(argv[0]); |
264dce47 | 1104 | |
fa649821 | 1105 | SSLeay_add_all_algorithms(); |
4b4810d4 | 1106 | log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
c35a6dc5 | 1107 | |
ce88d9df | 1108 | init_rng(); |
1109 | seed_rng(); | |
a306f2dd | 1110 | |
aa3378df | 1111 | /* we need this for the home * directory. */ |
5260325f | 1112 | pw = getpwuid(getuid()); |
1113 | if (!pw) { | |
1114 | printf("You don't exist, go away!\n"); | |
1115 | exit(1); | |
1116 | } | |
a306f2dd | 1117 | if (gethostname(hostname, sizeof(hostname)) < 0) { |
1118 | perror("gethostname"); | |
1119 | exit(1); | |
1120 | } | |
aa3378df | 1121 | |
4b4810d4 | 1122 | while ((opt = getopt(argc, argv, |
bdffbcdc | 1123 | "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
5260325f | 1124 | switch (opt) { |
1125 | case 'b': | |
0fe9892f | 1126 | bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr); |
de4feb6b | 1127 | if (errstr) |
1128 | fatal("Bits has bad value %s (%s)", | |
1129 | optarg, errstr); | |
5260325f | 1130 | break; |
bdffbcdc | 1131 | case 'F': |
1132 | find_host = 1; | |
1133 | rr_hostname = optarg; | |
1134 | break; | |
1135 | case 'H': | |
1136 | hash_hosts = 1; | |
1137 | break; | |
1138 | case 'R': | |
1139 | delete_host = 1; | |
1140 | rr_hostname = optarg; | |
1141 | break; | |
5260325f | 1142 | case 'l': |
1143 | print_fingerprint = 1; | |
1144 | break; | |
aaf45d87 | 1145 | case 'B': |
1146 | print_bubblebabble = 1; | |
1147 | break; | |
5260325f | 1148 | case 'p': |
1149 | change_passphrase = 1; | |
1150 | break; | |
5260325f | 1151 | case 'c': |
1152 | change_comment = 1; | |
1153 | break; | |
5260325f | 1154 | case 'f': |
c784ae09 | 1155 | if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
1156 | sizeof(identity_file)) | |
1157 | fatal("Identity filename too long"); | |
5260325f | 1158 | have_identity = 1; |
1159 | break; | |
21289cd0 | 1160 | case 'g': |
1161 | print_generic = 1; | |
1162 | break; | |
5260325f | 1163 | case 'P': |
1164 | identity_passphrase = optarg; | |
1165 | break; | |
5260325f | 1166 | case 'N': |
1167 | identity_new_passphrase = optarg; | |
1168 | break; | |
5260325f | 1169 | case 'C': |
1170 | identity_comment = optarg; | |
1171 | break; | |
5260325f | 1172 | case 'q': |
1173 | quiet = 1; | |
1174 | break; | |
5deceabb | 1175 | case 'e': |
a306f2dd | 1176 | case 'x': |
5deceabb | 1177 | /* export key */ |
a306f2dd | 1178 | convert_to_ssh2 = 1; |
1179 | break; | |
5deceabb | 1180 | case 'i': |
a306f2dd | 1181 | case 'X': |
5deceabb | 1182 | /* import key */ |
a306f2dd | 1183 | convert_from_ssh2 = 1; |
1184 | break; | |
a306f2dd | 1185 | case 'y': |
1186 | print_public = 1; | |
1187 | break; | |
a306f2dd | 1188 | case 'd': |
fa08c86b | 1189 | key_type_name = "dsa"; |
a306f2dd | 1190 | break; |
fa08c86b | 1191 | case 't': |
1192 | key_type_name = optarg; | |
fa08c86b | 1193 | break; |
93a56445 | 1194 | case 'D': |
1195 | download = 1; | |
32596c7b | 1196 | /*FALLTHROUGH*/ |
285d2b15 | 1197 | case 'U': |
93a56445 | 1198 | reader_id = optarg; |
2b30154a | 1199 | break; |
c6fbc95a | 1200 | case 'v': |
1201 | if (log_level == SYSLOG_LEVEL_INFO) | |
1202 | log_level = SYSLOG_LEVEL_DEBUG1; | |
1203 | else { | |
f2107e97 | 1204 | if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
c6fbc95a | 1205 | log_level < SYSLOG_LEVEL_DEBUG3) |
1206 | log_level++; | |
1207 | } | |
1208 | break; | |
21289cd0 | 1209 | case 'r': |
bdffbcdc | 1210 | rr_hostname = optarg; |
21289cd0 | 1211 | break; |
c35a6dc5 | 1212 | case 'W': |
0fe9892f | 1213 | generator_wanted = (u_int32_t)strtonum(optarg, 1, |
1214 | UINT_MAX, &errstr); | |
c784ae09 | 1215 | if (errstr) |
1216 | fatal("Desired generator has bad value: %s (%s)", | |
1217 | optarg, errstr); | |
c35a6dc5 | 1218 | break; |
1219 | case 'a': | |
0fe9892f | 1220 | trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1221 | if (errstr) |
1222 | fatal("Invalid number of trials: %s (%s)", | |
1223 | optarg, errstr); | |
c35a6dc5 | 1224 | break; |
1225 | case 'M': | |
0fe9892f | 1226 | memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
c784ae09 | 1227 | if (errstr) { |
1228 | fatal("Memory limit is %s: %s", errstr, optarg); | |
1229 | } | |
c35a6dc5 | 1230 | break; |
1231 | case 'G': | |
1232 | do_gen_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 'T': | |
1238 | do_screen_candidates = 1; | |
c784ae09 | 1239 | if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
1240 | sizeof(out_file)) | |
1241 | fatal("Output filename too long"); | |
c35a6dc5 | 1242 | break; |
1243 | case 'S': | |
1244 | /* XXX - also compare length against bits */ | |
1245 | if (BN_hex2bn(&start, optarg) == 0) | |
1246 | fatal("Invalid start point."); | |
1247 | break; | |
5260325f | 1248 | case '?': |
1249 | default: | |
1250 | usage(); | |
1251 | } | |
1252 | } | |
c6fbc95a | 1253 | |
1254 | /* reinit */ | |
4b4810d4 | 1255 | log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); |
c6fbc95a | 1256 | |
4b4810d4 | 1257 | if (optind < argc) { |
5260325f | 1258 | printf("Too many arguments.\n"); |
1259 | usage(); | |
1260 | } | |
1261 | if (change_passphrase && change_comment) { | |
1262 | printf("Can only have one of -p and -c.\n"); | |
1263 | usage(); | |
1264 | } | |
048acbeb | 1265 | if (print_fingerprint && (delete_host || hash_hosts)) { |
1266 | printf("Cannot use -l with -D or -R.\n"); | |
1267 | usage(); | |
1268 | } | |
bdffbcdc | 1269 | if (delete_host || hash_hosts || find_host) |
1270 | do_known_hosts(pw, rr_hostname); | |
aaf45d87 | 1271 | if (print_fingerprint || print_bubblebabble) |
5260325f | 1272 | do_fingerprint(pw); |
5260325f | 1273 | if (change_passphrase) |
1274 | do_change_passphrase(pw); | |
633151a3 | 1275 | if (change_comment) |
1276 | do_change_comment(pw); | |
ce88d9df | 1277 | if (convert_to_ssh2) |
1278 | do_convert_to_ssh2(pw); | |
1279 | if (convert_from_ssh2) | |
1280 | do_convert_from_ssh2(pw); | |
a306f2dd | 1281 | if (print_public) |
1282 | do_print_public(pw); | |
bdffbcdc | 1283 | if (rr_hostname != NULL) { |
3eff92ec | 1284 | unsigned int n = 0; |
1285 | ||
1286 | if (have_identity) { | |
1287 | n = do_print_resource_record(pw, | |
1288 | identity_file, rr_hostname); | |
1289 | if (n == 0) { | |
1290 | perror(identity_file); | |
1291 | exit(1); | |
1292 | } | |
1293 | exit(0); | |
1294 | } else { | |
1295 | ||
1296 | n += do_print_resource_record(pw, | |
1297 | _PATH_HOST_RSA_KEY_FILE, rr_hostname); | |
1298 | n += do_print_resource_record(pw, | |
1299 | _PATH_HOST_DSA_KEY_FILE, rr_hostname); | |
1300 | ||
1301 | if (n == 0) | |
1302 | fatal("no keys found."); | |
1303 | exit(0); | |
1304 | } | |
21289cd0 | 1305 | } |
93a56445 | 1306 | if (reader_id != NULL) { |
4f831fd7 | 1307 | #ifdef SMARTCARD |
93a56445 | 1308 | if (download) |
1309 | do_download(pw, reader_id); | |
1310 | else | |
1311 | do_upload(pw, reader_id); | |
3e984472 | 1312 | #else /* SMARTCARD */ |
4f831fd7 | 1313 | fatal("no support for smartcards."); |
3e984472 | 1314 | #endif /* SMARTCARD */ |
93a56445 | 1315 | } |
5260325f | 1316 | |
c35a6dc5 | 1317 | if (do_gen_candidates) { |
1318 | FILE *out = fopen(out_file, "w"); | |
b6453d99 | 1319 | |
c35a6dc5 | 1320 | if (out == NULL) { |
1321 | error("Couldn't open modulus candidate file \"%s\": %s", | |
1322 | out_file, strerror(errno)); | |
1323 | return (1); | |
1324 | } | |
255d3e00 | 1325 | if (bits == 0) |
1326 | bits = DEFAULT_BITS; | |
c35a6dc5 | 1327 | if (gen_candidates(out, memory, bits, start) != 0) |
17318dd6 | 1328 | fatal("modulus candidate generation failed"); |
c35a6dc5 | 1329 | |
1330 | return (0); | |
1331 | } | |
1332 | ||
1333 | if (do_screen_candidates) { | |
1334 | FILE *in; | |
1335 | FILE *out = fopen(out_file, "w"); | |
1336 | ||
1337 | if (have_identity && strcmp(identity_file, "-") != 0) { | |
1338 | if ((in = fopen(identity_file, "r")) == NULL) { | |
1339 | fatal("Couldn't open modulus candidate " | |
aff51935 | 1340 | "file \"%s\": %s", identity_file, |
c35a6dc5 | 1341 | strerror(errno)); |
1342 | } | |
1343 | } else | |
1344 | in = stdin; | |
1345 | ||
1346 | if (out == NULL) { | |
1347 | fatal("Couldn't open moduli file \"%s\": %s", | |
1348 | out_file, strerror(errno)); | |
1349 | } | |
1350 | if (prime_test(in, out, trials, generator_wanted) != 0) | |
17318dd6 | 1351 | fatal("modulus screening failed"); |
08d035b6 | 1352 | return (0); |
c35a6dc5 | 1353 | } |
1354 | ||
5260325f | 1355 | arc4random_stir(); |
1356 | ||
882c9d5a | 1357 | if (key_type_name == NULL) |
1358 | key_type_name = "rsa"; | |
1359 | ||
c523303b | 1360 | type = key_type_from_name(key_type_name); |
1361 | if (type == KEY_UNSPEC) { | |
1362 | fprintf(stderr, "unknown key type %s\n", key_type_name); | |
1363 | exit(1); | |
a306f2dd | 1364 | } |
255d3e00 | 1365 | if (bits == 0) |
1366 | bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; | |
6e94bd72 | 1367 | if (type == KEY_DSA && bits != 1024) |
1368 | fatal("DSA keys must be 1024 bits"); | |
60dc0294 | 1369 | if (!quiet) |
1370 | printf("Generating public/private %s key pair.\n", key_type_name); | |
fa08c86b | 1371 | private = key_generate(type, bits); |
1372 | if (private == NULL) { | |
7eec82ab | 1373 | fprintf(stderr, "key_generate failed\n"); |
fa08c86b | 1374 | exit(1); |
1375 | } | |
1376 | public = key_from_private(private); | |
5260325f | 1377 | |
1378 | if (!have_identity) | |
1379 | ask_filename(pw, "Enter file in which to save the key"); | |
1380 | ||
7b9b0103 | 1381 | /* Create ~/.ssh directory if it doesn't already exist. */ |
42f11eb2 | 1382 | snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
5260325f | 1383 | if (strstr(identity_file, dotsshdir) != NULL && |
1384 | stat(dotsshdir, &st) < 0) { | |
704b1659 | 1385 | if (mkdir(dotsshdir, 0700) < 0) |
5260325f | 1386 | error("Could not create directory '%s'.", dotsshdir); |
1387 | else if (!quiet) | |
1388 | printf("Created directory '%s'.\n", dotsshdir); | |
1389 | } | |
1390 | /* If the file already exists, ask the user to confirm. */ | |
1391 | if (stat(identity_file, &st) >= 0) { | |
1392 | char yesno[3]; | |
1393 | printf("%s already exists.\n", identity_file); | |
1394 | printf("Overwrite (y/n)? "); | |
1395 | fflush(stdout); | |
1396 | if (fgets(yesno, sizeof(yesno), stdin) == NULL) | |
1397 | exit(1); | |
1398 | if (yesno[0] != 'y' && yesno[0] != 'Y') | |
1399 | exit(1); | |
1400 | } | |
1401 | /* Ask for a passphrase (twice). */ | |
1402 | if (identity_passphrase) | |
1403 | passphrase1 = xstrdup(identity_passphrase); | |
1404 | else if (identity_new_passphrase) | |
1405 | passphrase1 = xstrdup(identity_new_passphrase); | |
1406 | else { | |
1407 | passphrase_again: | |
1408 | passphrase1 = | |
1843a425 | 1409 | read_passphrase("Enter passphrase (empty for no " |
1410 | "passphrase): ", RP_ALLOW_STDIN); | |
1411 | passphrase2 = read_passphrase("Enter same passphrase again: ", | |
1412 | RP_ALLOW_STDIN); | |
5260325f | 1413 | if (strcmp(passphrase1, passphrase2) != 0) { |
1843a425 | 1414 | /* |
1415 | * The passphrases do not match. Clear them and | |
1416 | * retry. | |
1417 | */ | |
5260325f | 1418 | memset(passphrase1, 0, strlen(passphrase1)); |
1419 | memset(passphrase2, 0, strlen(passphrase2)); | |
1420 | xfree(passphrase1); | |
1421 | xfree(passphrase2); | |
1422 | printf("Passphrases do not match. Try again.\n"); | |
1423 | goto passphrase_again; | |
1424 | } | |
1425 | /* Clear the other copy of the passphrase. */ | |
1426 | memset(passphrase2, 0, strlen(passphrase2)); | |
1427 | xfree(passphrase2); | |
1428 | } | |
1429 | ||
5260325f | 1430 | if (identity_comment) { |
1431 | strlcpy(comment, identity_comment, sizeof(comment)); | |
1432 | } else { | |
1890bf8b | 1433 | /* Create default comment field for the passphrase. */ |
5260325f | 1434 | snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
1435 | } | |
1436 | ||
1437 | /* Save the key with the given passphrase and comment. */ | |
aeaa3d9e | 1438 | if (!key_save_private(private, identity_file, passphrase1, comment)) { |
58cfa257 | 1439 | printf("Saving the key failed: %s.\n", identity_file); |
5260325f | 1440 | memset(passphrase1, 0, strlen(passphrase1)); |
1441 | xfree(passphrase1); | |
1442 | exit(1); | |
1443 | } | |
1444 | /* Clear the passphrase. */ | |
1445 | memset(passphrase1, 0, strlen(passphrase1)); | |
1446 | xfree(passphrase1); | |
1447 | ||
1448 | /* Clear the private key and the random number generator. */ | |
fa08c86b | 1449 | key_free(private); |
5260325f | 1450 | arc4random_stir(); |
1451 | ||
1452 | if (!quiet) | |
1453 | printf("Your identification has been saved in %s.\n", identity_file); | |
1454 | ||
5260325f | 1455 | strlcat(identity_file, ".pub", sizeof(identity_file)); |
1c9a907f | 1456 | fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
1457 | if (fd == -1) { | |
5260325f | 1458 | printf("Could not save your public key in %s\n", identity_file); |
1459 | exit(1); | |
1460 | } | |
1c9a907f | 1461 | f = fdopen(fd, "w"); |
1462 | if (f == NULL) { | |
7eec82ab | 1463 | printf("fdopen %s failed\n", identity_file); |
1c9a907f | 1464 | exit(1); |
1465 | } | |
a306f2dd | 1466 | if (!key_write(public, f)) |
7eec82ab | 1467 | fprintf(stderr, "write key failed\n"); |
a306f2dd | 1468 | fprintf(f, " %s\n", comment); |
5260325f | 1469 | fclose(f); |
1470 | ||
1471 | if (!quiet) { | |
22138a36 | 1472 | char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
aff73c5f | 1473 | char *ra = key_fingerprint(public, SSH_FP_MD5, |
1474 | SSH_FP_RANDOMART); | |
a306f2dd | 1475 | printf("Your public key has been saved in %s.\n", |
1476 | identity_file); | |
5260325f | 1477 | printf("The key fingerprint is:\n"); |
22138a36 | 1478 | printf("%s %s\n", fp, comment); |
aff73c5f | 1479 | printf("The key's randomart image is:\n"); |
1480 | printf("%s\n", ra); | |
1481 | xfree(ra); | |
22138a36 | 1482 | xfree(fp); |
8efc0c15 | 1483 | } |
a306f2dd | 1484 | |
1485 | key_free(public); | |
5260325f | 1486 | exit(0); |
8efc0c15 | 1487 | } |