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e6207598 | 1 | /* $OpenBSD: ssh-agent.c,v 1.79 2002/01/18 18:14:17 stevesk Exp $ */ |
dae3fa13 | 2 | |
8efc0c15 | 3 | /* |
5260325f | 4 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
6 | * All rights reserved | |
5260325f | 7 | * The authentication agent program. |
2e73a022 | 8 | * |
bcbf86ec | 9 | * As far as I am concerned, the code I have written for this software |
10 | * can be used freely for any purpose. Any derived versions of this | |
11 | * software must be clearly marked as such, and if the derived work is | |
12 | * incompatible with the protocol description in the RFC file, it must be | |
13 | * called by a name other than "ssh" or "Secure Shell". | |
14 | * | |
a96070d4 | 15 | * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. |
bcbf86ec | 16 | * |
17 | * Redistribution and use in source and binary forms, with or without | |
18 | * modification, are permitted provided that the following conditions | |
19 | * are met: | |
20 | * 1. Redistributions of source code must retain the above copyright | |
21 | * notice, this list of conditions and the following disclaimer. | |
22 | * 2. Redistributions in binary form must reproduce the above copyright | |
23 | * notice, this list of conditions and the following disclaimer in the | |
24 | * documentation and/or other materials provided with the distribution. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
27 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
28 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
29 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
30 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
31 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
32 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
33 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
34 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
35 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
5260325f | 36 | */ |
8efc0c15 | 37 | |
38 | #include "includes.h" | |
e6207598 | 39 | RCSID("$OpenBSD: ssh-agent.c,v 1.79 2002/01/18 18:14:17 stevesk Exp $"); |
42f11eb2 | 40 | |
187cd1fa | 41 | #if defined(HAVE_SYS_QUEUE_H) && !defined(HAVE_BOGUS_SYS_QUEUE_H) |
42 | #include <sys/queue.h> | |
43 | #else | |
44 | #include "openbsd-compat/fake-queue.h" | |
45 | #endif | |
46 | ||
47 | ||
42f11eb2 | 48 | #include <openssl/evp.h> |
49 | #include <openssl/md5.h> | |
8efc0c15 | 50 | |
51 | #include "ssh.h" | |
52 | #include "rsa.h" | |
8efc0c15 | 53 | #include "buffer.h" |
54 | #include "bufaux.h" | |
55 | #include "xmalloc.h" | |
56 | #include "packet.h" | |
57 | #include "getput.h" | |
58 | #include "mpaux.h" | |
4c8722d9 | 59 | #include "key.h" |
60 | #include "authfd.h" | |
42f11eb2 | 61 | #include "cipher.h" |
2e73a022 | 62 | #include "kex.h" |
188adeb2 | 63 | #include "compat.h" |
42f11eb2 | 64 | #include "log.h" |
8efc0c15 | 65 | |
2b5fe3b8 | 66 | #ifdef SMARTCARD |
67 | #include <openssl/engine.h> | |
68 | #include "scard.h" | |
dd2495cb | 69 | #endif |
2b5fe3b8 | 70 | |
17a3011c | 71 | typedef enum { |
72 | AUTH_UNUSED, | |
73 | AUTH_SOCKET, | |
74 | AUTH_CONNECTION | |
75 | } sock_type; | |
76 | ||
5260325f | 77 | typedef struct { |
78 | int fd; | |
17a3011c | 79 | sock_type type; |
5260325f | 80 | Buffer input; |
81 | Buffer output; | |
8efc0c15 | 82 | } SocketEntry; |
83 | ||
1e3b8b07 | 84 | u_int sockets_alloc = 0; |
8efc0c15 | 85 | SocketEntry *sockets = NULL; |
86 | ||
95f0a918 | 87 | typedef struct identity { |
88 | TAILQ_ENTRY(identity) next; | |
2e73a022 | 89 | Key *key; |
5260325f | 90 | char *comment; |
8efc0c15 | 91 | } Identity; |
92 | ||
2e73a022 | 93 | typedef struct { |
94 | int nentries; | |
95f0a918 | 95 | TAILQ_HEAD(idqueue, identity) idlist; |
2e73a022 | 96 | } Idtab; |
97 | ||
98 | /* private key table, one per protocol version */ | |
99 | Idtab idtable[3]; | |
8efc0c15 | 100 | |
101 | int max_fd = 0; | |
102 | ||
103 | /* pid of shell == parent of agent */ | |
9da5c3c9 | 104 | pid_t parent_pid = -1; |
8efc0c15 | 105 | |
106 | /* pathname and directory for AUTH_SOCKET */ | |
107 | char socket_name[1024]; | |
108 | char socket_dir[1024]; | |
109 | ||
5260325f | 110 | #ifdef HAVE___PROGNAME |
111 | extern char *__progname; | |
260d427b | 112 | #else |
113 | char *__progname; | |
114 | #endif | |
5260325f | 115 | |
396c147e | 116 | static void |
2e73a022 | 117 | idtab_init(void) |
118 | { | |
119 | int i; | |
6aacefa7 | 120 | for (i = 0; i <=2; i++) { |
95f0a918 | 121 | TAILQ_INIT(&idtable[i].idlist); |
2e73a022 | 122 | idtable[i].nentries = 0; |
123 | } | |
124 | } | |
125 | ||
126 | /* return private key table for requested protocol version */ | |
396c147e | 127 | static Idtab * |
2e73a022 | 128 | idtab_lookup(int version) |
129 | { | |
130 | if (version < 1 || version > 2) | |
131 | fatal("internal error, bad protocol version %d", version); | |
132 | return &idtable[version]; | |
133 | } | |
134 | ||
135 | /* return matching private key for given public key */ | |
95f0a918 | 136 | static Identity * |
137 | lookup_identity(Key *key, int version) | |
2e73a022 | 138 | { |
95f0a918 | 139 | Identity *id; |
140 | ||
2e73a022 | 141 | Idtab *tab = idtab_lookup(version); |
95f0a918 | 142 | TAILQ_FOREACH(id, &tab->idlist, next) { |
143 | if (key_equal(key, id->key)) | |
144 | return (id); | |
2e73a022 | 145 | } |
95f0a918 | 146 | return (NULL); |
147 | } | |
148 | ||
149 | static void | |
150 | free_identity(Identity *id) | |
151 | { | |
152 | key_free(id->key); | |
153 | xfree(id->comment); | |
154 | xfree(id); | |
2e73a022 | 155 | } |
156 | ||
157 | /* send list of supported public keys to 'client' */ | |
396c147e | 158 | static void |
2e73a022 | 159 | process_request_identities(SocketEntry *e, int version) |
8efc0c15 | 160 | { |
2e73a022 | 161 | Idtab *tab = idtab_lookup(version); |
5260325f | 162 | Buffer msg; |
95f0a918 | 163 | Identity *id; |
5260325f | 164 | |
165 | buffer_init(&msg); | |
2e73a022 | 166 | buffer_put_char(&msg, (version == 1) ? |
167 | SSH_AGENT_RSA_IDENTITIES_ANSWER : SSH2_AGENT_IDENTITIES_ANSWER); | |
168 | buffer_put_int(&msg, tab->nentries); | |
95f0a918 | 169 | TAILQ_FOREACH(id, &tab->idlist, next) { |
fa08c86b | 170 | if (id->key->type == KEY_RSA1) { |
2e73a022 | 171 | buffer_put_int(&msg, BN_num_bits(id->key->rsa->n)); |
172 | buffer_put_bignum(&msg, id->key->rsa->e); | |
173 | buffer_put_bignum(&msg, id->key->rsa->n); | |
174 | } else { | |
1e3b8b07 | 175 | u_char *blob; |
176 | u_int blen; | |
fa08c86b | 177 | key_to_blob(id->key, &blob, &blen); |
2e73a022 | 178 | buffer_put_string(&msg, blob, blen); |
179 | xfree(blob); | |
180 | } | |
181 | buffer_put_cstring(&msg, id->comment); | |
5260325f | 182 | } |
183 | buffer_put_int(&e->output, buffer_len(&msg)); | |
184 | buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg)); | |
185 | buffer_free(&msg); | |
8efc0c15 | 186 | } |
187 | ||
2e73a022 | 188 | /* ssh1 only */ |
396c147e | 189 | static void |
2e73a022 | 190 | process_authentication_challenge1(SocketEntry *e) |
8efc0c15 | 191 | { |
95f0a918 | 192 | Identity *id; |
193 | Key *key; | |
2e73a022 | 194 | BIGNUM *challenge; |
195 | int i, len; | |
5260325f | 196 | Buffer msg; |
197 | MD5_CTX md; | |
1e3b8b07 | 198 | u_char buf[32], mdbuf[16], session_id[16]; |
199 | u_int response_type; | |
5260325f | 200 | |
201 | buffer_init(&msg); | |
fa08c86b | 202 | key = key_new(KEY_RSA1); |
b775c6f2 | 203 | if ((challenge = BN_new()) == NULL) |
204 | fatal("process_authentication_challenge1: BN_new failed"); | |
5260325f | 205 | |
2e73a022 | 206 | buffer_get_int(&e->input); /* ignored */ |
207 | buffer_get_bignum(&e->input, key->rsa->e); | |
208 | buffer_get_bignum(&e->input, key->rsa->n); | |
209 | buffer_get_bignum(&e->input, challenge); | |
5260325f | 210 | |
2e73a022 | 211 | /* Only protocol 1.1 is supported */ |
212 | if (buffer_len(&e->input) == 0) | |
213 | goto failure; | |
e6207598 | 214 | buffer_get(&e->input, session_id, 16); |
2e73a022 | 215 | response_type = buffer_get_int(&e->input); |
216 | if (response_type != 1) | |
217 | goto failure; | |
218 | ||
95f0a918 | 219 | id = lookup_identity(key, 1); |
220 | if (id != NULL) { | |
221 | Key *private = id->key; | |
2e73a022 | 222 | /* Decrypt the challenge using the private key. */ |
46aa2d1f | 223 | if (rsa_private_decrypt(challenge, challenge, private->rsa) <= 0) |
224 | goto failure; | |
2e73a022 | 225 | |
226 | /* The response is MD5 of decrypted challenge plus session id. */ | |
227 | len = BN_num_bytes(challenge); | |
228 | if (len <= 0 || len > 32) { | |
229 | log("process_authentication_challenge: bad challenge length %d", len); | |
230 | goto failure; | |
5260325f | 231 | } |
2e73a022 | 232 | memset(buf, 0, 32); |
233 | BN_bn2bin(challenge, buf + 32 - len); | |
234 | MD5_Init(&md); | |
235 | MD5_Update(&md, buf, 32); | |
236 | MD5_Update(&md, session_id, 16); | |
237 | MD5_Final(mdbuf, &md); | |
238 | ||
239 | /* Send the response. */ | |
240 | buffer_put_char(&msg, SSH_AGENT_RSA_RESPONSE); | |
241 | for (i = 0; i < 16; i++) | |
242 | buffer_put_char(&msg, mdbuf[i]); | |
243 | goto send; | |
244 | } | |
245 | ||
246 | failure: | |
247 | /* Unknown identity or protocol error. Send failure. */ | |
5260325f | 248 | buffer_put_char(&msg, SSH_AGENT_FAILURE); |
249 | send: | |
2e73a022 | 250 | buffer_put_int(&e->output, buffer_len(&msg)); |
251 | buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg)); | |
252 | key_free(key); | |
253 | BN_clear_free(challenge); | |
254 | buffer_free(&msg); | |
255 | } | |
256 | ||
257 | /* ssh2 only */ | |
396c147e | 258 | static void |
2e73a022 | 259 | process_sign_request2(SocketEntry *e) |
260 | { | |
261 | extern int datafellows; | |
95f0a918 | 262 | Key *key; |
1e3b8b07 | 263 | u_char *blob, *data, *signature = NULL; |
264 | u_int blen, dlen, slen = 0; | |
188adeb2 | 265 | int flags; |
2e73a022 | 266 | Buffer msg; |
267 | int ok = -1; | |
268 | ||
269 | datafellows = 0; | |
227e8e86 | 270 | |
2e73a022 | 271 | blob = buffer_get_string(&e->input, &blen); |
272 | data = buffer_get_string(&e->input, &dlen); | |
188adeb2 | 273 | |
274 | flags = buffer_get_int(&e->input); | |
275 | if (flags & SSH_AGENT_OLD_SIGNATURE) | |
276 | datafellows = SSH_BUG_SIGBLOB; | |
2e73a022 | 277 | |
fa08c86b | 278 | key = key_from_blob(blob, blen); |
2e73a022 | 279 | if (key != NULL) { |
95f0a918 | 280 | Identity *id = lookup_identity(key, 2); |
281 | if (id != NULL) | |
282 | ok = key_sign(id->key, &signature, &slen, data, dlen); | |
2e73a022 | 283 | } |
284 | key_free(key); | |
285 | buffer_init(&msg); | |
286 | if (ok == 0) { | |
287 | buffer_put_char(&msg, SSH2_AGENT_SIGN_RESPONSE); | |
288 | buffer_put_string(&msg, signature, slen); | |
289 | } else { | |
290 | buffer_put_char(&msg, SSH_AGENT_FAILURE); | |
291 | } | |
5260325f | 292 | buffer_put_int(&e->output, buffer_len(&msg)); |
293 | buffer_append(&e->output, buffer_ptr(&msg), | |
2e73a022 | 294 | buffer_len(&msg)); |
5260325f | 295 | buffer_free(&msg); |
2e73a022 | 296 | xfree(data); |
297 | xfree(blob); | |
298 | if (signature != NULL) | |
299 | xfree(signature); | |
8efc0c15 | 300 | } |
301 | ||
2e73a022 | 302 | /* shared */ |
396c147e | 303 | static void |
2e73a022 | 304 | process_remove_identity(SocketEntry *e, int version) |
8efc0c15 | 305 | { |
95f0a918 | 306 | Key *key = NULL; |
1e3b8b07 | 307 | u_char *blob; |
308 | u_int blen; | |
309 | u_int bits; | |
2e73a022 | 310 | int success = 0; |
311 | ||
6aacefa7 | 312 | switch (version) { |
2e73a022 | 313 | case 1: |
fa08c86b | 314 | key = key_new(KEY_RSA1); |
2e73a022 | 315 | bits = buffer_get_int(&e->input); |
316 | buffer_get_bignum(&e->input, key->rsa->e); | |
317 | buffer_get_bignum(&e->input, key->rsa->n); | |
318 | ||
319 | if (bits != key_size(key)) | |
320 | log("Warning: identity keysize mismatch: actual %d, announced %d", | |
42f11eb2 | 321 | key_size(key), bits); |
2e73a022 | 322 | break; |
323 | case 2: | |
324 | blob = buffer_get_string(&e->input, &blen); | |
fa08c86b | 325 | key = key_from_blob(blob, blen); |
2e73a022 | 326 | xfree(blob); |
327 | break; | |
328 | } | |
329 | if (key != NULL) { | |
95f0a918 | 330 | Identity *id = lookup_identity(key, version); |
331 | if (id != NULL) { | |
aa3378df | 332 | /* |
333 | * We have this key. Free the old key. Since we | |
334 | * don\'t want to leave empty slots in the middle of | |
d343d900 | 335 | * the array, we actually free the key there and move |
336 | * all the entries between the empty slot and the end | |
337 | * of the array. | |
aa3378df | 338 | */ |
2e73a022 | 339 | Idtab *tab = idtab_lookup(version); |
fa08c86b | 340 | if (tab->nentries < 1) |
341 | fatal("process_remove_identity: " | |
342 | "internal error: tab->nentries %d", | |
343 | tab->nentries); | |
95f0a918 | 344 | TAILQ_REMOVE(&tab->idlist, id, next); |
345 | free_identity(id); | |
2e73a022 | 346 | tab->nentries--; |
347 | success = 1; | |
5260325f | 348 | } |
2e73a022 | 349 | key_free(key); |
350 | } | |
8efc0c15 | 351 | buffer_put_int(&e->output, 1); |
2e73a022 | 352 | buffer_put_char(&e->output, |
353 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
8efc0c15 | 354 | } |
355 | ||
396c147e | 356 | static void |
2e73a022 | 357 | process_remove_all_identities(SocketEntry *e, int version) |
8efc0c15 | 358 | { |
2e73a022 | 359 | Idtab *tab = idtab_lookup(version); |
95f0a918 | 360 | Identity *id; |
8efc0c15 | 361 | |
5260325f | 362 | /* Loop over all identities and clear the keys. */ |
95f0a918 | 363 | for (id = TAILQ_FIRST(&tab->idlist); id; |
364 | id = TAILQ_FIRST(&tab->idlist)) { | |
365 | TAILQ_REMOVE(&tab->idlist, id, next); | |
366 | free_identity(id); | |
5260325f | 367 | } |
8efc0c15 | 368 | |
5260325f | 369 | /* Mark that there are no identities. */ |
2e73a022 | 370 | tab->nentries = 0; |
8efc0c15 | 371 | |
372 | /* Send success. */ | |
373 | buffer_put_int(&e->output, 1); | |
374 | buffer_put_char(&e->output, SSH_AGENT_SUCCESS); | |
375 | return; | |
5260325f | 376 | } |
377 | ||
396c147e | 378 | static void |
fa08c86b | 379 | process_add_identity(SocketEntry *e, int version) |
380 | { | |
381 | Key *k = NULL; | |
382 | char *type_name; | |
2e73a022 | 383 | char *comment; |
fa08c86b | 384 | int type, success = 0; |
2e73a022 | 385 | Idtab *tab = idtab_lookup(version); |
5260325f | 386 | |
2e73a022 | 387 | switch (version) { |
388 | case 1: | |
fa08c86b | 389 | k = key_new_private(KEY_RSA1); |
42f11eb2 | 390 | buffer_get_int(&e->input); /* ignored */ |
fa08c86b | 391 | buffer_get_bignum(&e->input, k->rsa->n); |
392 | buffer_get_bignum(&e->input, k->rsa->e); | |
393 | buffer_get_bignum(&e->input, k->rsa->d); | |
394 | buffer_get_bignum(&e->input, k->rsa->iqmp); | |
2e73a022 | 395 | |
396 | /* SSH and SSL have p and q swapped */ | |
fa08c86b | 397 | buffer_get_bignum(&e->input, k->rsa->q); /* p */ |
398 | buffer_get_bignum(&e->input, k->rsa->p); /* q */ | |
2e73a022 | 399 | |
400 | /* Generate additional parameters */ | |
2b63e803 | 401 | rsa_generate_additional_parameters(k->rsa); |
2e73a022 | 402 | break; |
403 | case 2: | |
fa08c86b | 404 | type_name = buffer_get_string(&e->input, NULL); |
42f11eb2 | 405 | type = key_type_from_name(type_name); |
fa08c86b | 406 | xfree(type_name); |
6aacefa7 | 407 | switch (type) { |
fa08c86b | 408 | case KEY_DSA: |
409 | k = key_new_private(type); | |
410 | buffer_get_bignum2(&e->input, k->dsa->p); | |
411 | buffer_get_bignum2(&e->input, k->dsa->q); | |
412 | buffer_get_bignum2(&e->input, k->dsa->g); | |
413 | buffer_get_bignum2(&e->input, k->dsa->pub_key); | |
414 | buffer_get_bignum2(&e->input, k->dsa->priv_key); | |
415 | break; | |
416 | case KEY_RSA: | |
417 | k = key_new_private(type); | |
418 | buffer_get_bignum2(&e->input, k->rsa->n); | |
419 | buffer_get_bignum2(&e->input, k->rsa->e); | |
420 | buffer_get_bignum2(&e->input, k->rsa->d); | |
421 | buffer_get_bignum2(&e->input, k->rsa->iqmp); | |
422 | buffer_get_bignum2(&e->input, k->rsa->p); | |
423 | buffer_get_bignum2(&e->input, k->rsa->q); | |
424 | ||
425 | /* Generate additional parameters */ | |
2b63e803 | 426 | rsa_generate_additional_parameters(k->rsa); |
fa08c86b | 427 | break; |
428 | default: | |
2e73a022 | 429 | buffer_clear(&e->input); |
2e73a022 | 430 | goto send; |
5260325f | 431 | } |
2e73a022 | 432 | break; |
433 | } | |
2e73a022 | 434 | comment = buffer_get_string(&e->input, NULL); |
435 | if (k == NULL) { | |
436 | xfree(comment); | |
437 | goto send; | |
438 | } | |
439 | success = 1; | |
95f0a918 | 440 | if (lookup_identity(k, version) == NULL) { |
441 | Identity *id = xmalloc(sizeof(Identity)); | |
442 | id->key = k; | |
443 | id->comment = comment; | |
444 | TAILQ_INSERT_TAIL(&tab->idlist, id, next); | |
2e73a022 | 445 | /* Increment the number of identities. */ |
446 | tab->nentries++; | |
447 | } else { | |
448 | key_free(k); | |
449 | xfree(comment); | |
450 | } | |
451 | send: | |
5260325f | 452 | buffer_put_int(&e->output, 1); |
2e73a022 | 453 | buffer_put_char(&e->output, |
454 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
8efc0c15 | 455 | } |
456 | ||
2b5fe3b8 | 457 | |
458 | #ifdef SMARTCARD | |
459 | static void | |
460 | process_add_smartcard_key (SocketEntry *e) | |
461 | { | |
462 | Idtab *tab; | |
463 | Key *n = NULL, *k = NULL; | |
9ff6f66f | 464 | char *sc_reader_id = NULL; |
2b5fe3b8 | 465 | int success = 0; |
184eed6a | 466 | |
9ff6f66f | 467 | sc_reader_id = buffer_get_string(&e->input, NULL); |
468 | k = sc_get_key(sc_reader_id); | |
469 | xfree(sc_reader_id); | |
2b5fe3b8 | 470 | |
2b5fe3b8 | 471 | if (k == NULL) { |
472 | error("sc_get_pubkey failed"); | |
473 | goto send; | |
474 | } | |
475 | success = 1; | |
476 | ||
477 | tab = idtab_lookup(1); | |
a0e0f486 | 478 | k->type = KEY_RSA1; |
95f0a918 | 479 | if (lookup_identity(k, 1) == NULL) { |
480 | Identity *id = xmalloc(sizeof(Identity)); | |
2b5fe3b8 | 481 | n = key_new(KEY_RSA1); |
482 | BN_copy(n->rsa->n, k->rsa->n); | |
483 | BN_copy(n->rsa->e, k->rsa->e); | |
484 | RSA_set_method(n->rsa, sc_get_engine()); | |
95f0a918 | 485 | id->key = n; |
486 | id->comment = xstrdup("rsa1 smartcard"); | |
487 | TAILQ_INSERT_TAIL(&tab->idlist, id, next); | |
2b5fe3b8 | 488 | tab->nentries++; |
489 | } | |
a0e0f486 | 490 | k->type = KEY_RSA; |
2b5fe3b8 | 491 | tab = idtab_lookup(2); |
95f0a918 | 492 | if (lookup_identity(k, 2) == NULL) { |
493 | Identity *id = xmalloc(sizeof(Identity)); | |
2b5fe3b8 | 494 | n = key_new(KEY_RSA); |
495 | BN_copy(n->rsa->n, k->rsa->n); | |
496 | BN_copy(n->rsa->e, k->rsa->e); | |
497 | RSA_set_method(n->rsa, sc_get_engine()); | |
95f0a918 | 498 | id->key = n; |
499 | id->comment = xstrdup("rsa smartcard"); | |
500 | TAILQ_INSERT_TAIL(&tab->idlist, id, next); | |
2b5fe3b8 | 501 | tab->nentries++; |
502 | } | |
503 | key_free(k); | |
504 | send: | |
505 | buffer_put_int(&e->output, 1); | |
506 | buffer_put_char(&e->output, | |
507 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
508 | } | |
509 | ||
510 | static void | |
511 | process_remove_smartcard_key(SocketEntry *e) | |
512 | { | |
95f0a918 | 513 | Key *k = NULL; |
2b5fe3b8 | 514 | int success = 0; |
9ff6f66f | 515 | char *sc_reader_id = NULL; |
2b5fe3b8 | 516 | |
9ff6f66f | 517 | sc_reader_id = buffer_get_string(&e->input, NULL); |
518 | k = sc_get_key(sc_reader_id); | |
519 | xfree(sc_reader_id); | |
2b5fe3b8 | 520 | |
9ff6f66f | 521 | if (k == NULL) { |
2b5fe3b8 | 522 | error("sc_get_pubkey failed"); |
523 | } else { | |
95f0a918 | 524 | Identity *id; |
77261db4 | 525 | k->type = KEY_RSA1; |
95f0a918 | 526 | id = lookup_identity(k, 1); |
527 | if (id != NULL) { | |
2b5fe3b8 | 528 | Idtab *tab = idtab_lookup(1); |
95f0a918 | 529 | TAILQ_REMOVE(&tab->idlist, id, next); |
530 | free_identity(id); | |
2b5fe3b8 | 531 | tab->nentries--; |
532 | success = 1; | |
533 | } | |
77261db4 | 534 | k->type = KEY_RSA; |
95f0a918 | 535 | id = lookup_identity(k, 2); |
536 | if (id != NULL) { | |
2b5fe3b8 | 537 | Idtab *tab = idtab_lookup(2); |
95f0a918 | 538 | TAILQ_REMOVE(&tab->idlist, id, next); |
539 | free_identity(id); | |
2b5fe3b8 | 540 | tab->nentries--; |
541 | success = 1; | |
542 | } | |
543 | key_free(k); | |
544 | } | |
545 | ||
546 | buffer_put_int(&e->output, 1); | |
547 | buffer_put_char(&e->output, | |
548 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
549 | } | |
3e984472 | 550 | #endif /* SMARTCARD */ |
2b5fe3b8 | 551 | |
2e73a022 | 552 | /* dispatch incoming messages */ |
553 | ||
396c147e | 554 | static void |
8efc0c15 | 555 | process_message(SocketEntry *e) |
556 | { | |
1e3b8b07 | 557 | u_int msg_len; |
558 | u_int type; | |
559 | u_char *cp; | |
5260325f | 560 | if (buffer_len(&e->input) < 5) |
561 | return; /* Incomplete message. */ | |
20905a8e | 562 | cp = buffer_ptr(&e->input); |
5260325f | 563 | msg_len = GET_32BIT(cp); |
564 | if (msg_len > 256 * 1024) { | |
565 | shutdown(e->fd, SHUT_RDWR); | |
566 | close(e->fd); | |
567 | e->type = AUTH_UNUSED; | |
568 | return; | |
569 | } | |
570 | if (buffer_len(&e->input) < msg_len + 4) | |
571 | return; | |
572 | buffer_consume(&e->input, 4); | |
573 | type = buffer_get_char(&e->input); | |
574 | ||
2b5fe3b8 | 575 | debug("type %d", type); |
5260325f | 576 | switch (type) { |
2e73a022 | 577 | /* ssh1 */ |
5260325f | 578 | case SSH_AGENTC_RSA_CHALLENGE: |
2e73a022 | 579 | process_authentication_challenge1(e); |
580 | break; | |
581 | case SSH_AGENTC_REQUEST_RSA_IDENTITIES: | |
582 | process_request_identities(e, 1); | |
5260325f | 583 | break; |
584 | case SSH_AGENTC_ADD_RSA_IDENTITY: | |
2e73a022 | 585 | process_add_identity(e, 1); |
5260325f | 586 | break; |
587 | case SSH_AGENTC_REMOVE_RSA_IDENTITY: | |
2e73a022 | 588 | process_remove_identity(e, 1); |
5260325f | 589 | break; |
590 | case SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES: | |
2e73a022 | 591 | process_remove_all_identities(e, 1); |
592 | break; | |
593 | /* ssh2 */ | |
594 | case SSH2_AGENTC_SIGN_REQUEST: | |
595 | process_sign_request2(e); | |
596 | break; | |
597 | case SSH2_AGENTC_REQUEST_IDENTITIES: | |
598 | process_request_identities(e, 2); | |
599 | break; | |
600 | case SSH2_AGENTC_ADD_IDENTITY: | |
601 | process_add_identity(e, 2); | |
602 | break; | |
603 | case SSH2_AGENTC_REMOVE_IDENTITY: | |
604 | process_remove_identity(e, 2); | |
605 | break; | |
606 | case SSH2_AGENTC_REMOVE_ALL_IDENTITIES: | |
607 | process_remove_all_identities(e, 2); | |
5260325f | 608 | break; |
2b5fe3b8 | 609 | #ifdef SMARTCARD |
610 | case SSH_AGENTC_ADD_SMARTCARD_KEY: | |
611 | process_add_smartcard_key(e); | |
184eed6a | 612 | break; |
2b5fe3b8 | 613 | case SSH_AGENTC_REMOVE_SMARTCARD_KEY: |
614 | process_remove_smartcard_key(e); | |
184eed6a | 615 | break; |
3e984472 | 616 | #endif /* SMARTCARD */ |
5260325f | 617 | default: |
618 | /* Unknown message. Respond with failure. */ | |
619 | error("Unknown message %d", type); | |
620 | buffer_clear(&e->input); | |
621 | buffer_put_int(&e->output, 1); | |
622 | buffer_put_char(&e->output, SSH_AGENT_FAILURE); | |
623 | break; | |
624 | } | |
8efc0c15 | 625 | } |
626 | ||
396c147e | 627 | static void |
17a3011c | 628 | new_socket(sock_type type, int fd) |
8efc0c15 | 629 | { |
1e3b8b07 | 630 | u_int i, old_alloc; |
5260325f | 631 | if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) |
632 | error("fcntl O_NONBLOCK: %s", strerror(errno)); | |
633 | ||
634 | if (fd > max_fd) | |
635 | max_fd = fd; | |
636 | ||
637 | for (i = 0; i < sockets_alloc; i++) | |
638 | if (sockets[i].type == AUTH_UNUSED) { | |
639 | sockets[i].fd = fd; | |
640 | sockets[i].type = type; | |
641 | buffer_init(&sockets[i].input); | |
642 | buffer_init(&sockets[i].output); | |
643 | return; | |
644 | } | |
645 | old_alloc = sockets_alloc; | |
646 | sockets_alloc += 10; | |
647 | if (sockets) | |
648 | sockets = xrealloc(sockets, sockets_alloc * sizeof(sockets[0])); | |
649 | else | |
650 | sockets = xmalloc(sockets_alloc * sizeof(sockets[0])); | |
651 | for (i = old_alloc; i < sockets_alloc; i++) | |
652 | sockets[i].type = AUTH_UNUSED; | |
653 | sockets[old_alloc].type = type; | |
654 | sockets[old_alloc].fd = fd; | |
655 | buffer_init(&sockets[old_alloc].input); | |
656 | buffer_init(&sockets[old_alloc].output); | |
8efc0c15 | 657 | } |
658 | ||
396c147e | 659 | static int |
e364646f | 660 | prepare_select(fd_set **fdrp, fd_set **fdwp, int *fdl, int *nallocp) |
8efc0c15 | 661 | { |
42f11eb2 | 662 | u_int i, sz; |
663 | int n = 0; | |
664 | ||
665 | for (i = 0; i < sockets_alloc; i++) { | |
5260325f | 666 | switch (sockets[i].type) { |
667 | case AUTH_SOCKET: | |
668 | case AUTH_CONNECTION: | |
42f11eb2 | 669 | n = MAX(n, sockets[i].fd); |
5260325f | 670 | break; |
671 | case AUTH_UNUSED: | |
672 | break; | |
673 | default: | |
674 | fatal("Unknown socket type %d", sockets[i].type); | |
675 | break; | |
676 | } | |
42f11eb2 | 677 | } |
678 | ||
679 | sz = howmany(n+1, NFDBITS) * sizeof(fd_mask); | |
e364646f | 680 | if (*fdrp == NULL || sz > *nallocp) { |
42f11eb2 | 681 | if (*fdrp) |
894c5fa6 | 682 | xfree(*fdrp); |
42f11eb2 | 683 | if (*fdwp) |
894c5fa6 | 684 | xfree(*fdwp); |
42f11eb2 | 685 | *fdrp = xmalloc(sz); |
686 | *fdwp = xmalloc(sz); | |
e364646f | 687 | *nallocp = sz; |
42f11eb2 | 688 | } |
e364646f | 689 | if (n < *fdl) |
690 | debug("XXX shrink: %d < %d", n, *fdl); | |
691 | *fdl = n; | |
42f11eb2 | 692 | memset(*fdrp, 0, sz); |
693 | memset(*fdwp, 0, sz); | |
694 | ||
695 | for (i = 0; i < sockets_alloc; i++) { | |
696 | switch (sockets[i].type) { | |
697 | case AUTH_SOCKET: | |
698 | case AUTH_CONNECTION: | |
699 | FD_SET(sockets[i].fd, *fdrp); | |
700 | if (buffer_len(&sockets[i].output) > 0) | |
701 | FD_SET(sockets[i].fd, *fdwp); | |
702 | break; | |
703 | default: | |
704 | break; | |
705 | } | |
706 | } | |
707 | return (1); | |
8efc0c15 | 708 | } |
709 | ||
396c147e | 710 | static void |
5260325f | 711 | after_select(fd_set *readset, fd_set *writeset) |
8efc0c15 | 712 | { |
1e3b8b07 | 713 | u_int i; |
5260325f | 714 | int len, sock; |
610cd5c6 | 715 | socklen_t slen; |
5260325f | 716 | char buf[1024]; |
717 | struct sockaddr_un sunaddr; | |
718 | ||
719 | for (i = 0; i < sockets_alloc; i++) | |
720 | switch (sockets[i].type) { | |
721 | case AUTH_UNUSED: | |
722 | break; | |
723 | case AUTH_SOCKET: | |
724 | if (FD_ISSET(sockets[i].fd, readset)) { | |
610cd5c6 | 725 | slen = sizeof(sunaddr); |
42f11eb2 | 726 | sock = accept(sockets[i].fd, |
727 | (struct sockaddr *) &sunaddr, &slen); | |
5260325f | 728 | if (sock < 0) { |
729 | perror("accept from AUTH_SOCKET"); | |
730 | break; | |
731 | } | |
732 | new_socket(AUTH_CONNECTION, sock); | |
733 | } | |
734 | break; | |
735 | case AUTH_CONNECTION: | |
736 | if (buffer_len(&sockets[i].output) > 0 && | |
737 | FD_ISSET(sockets[i].fd, writeset)) { | |
bbc62e59 | 738 | do { |
739 | len = write(sockets[i].fd, | |
740 | buffer_ptr(&sockets[i].output), | |
741 | buffer_len(&sockets[i].output)); | |
742 | if (len == -1 && (errno == EAGAIN || | |
743 | errno == EINTR)) | |
744 | continue; | |
745 | break; | |
746 | } while (1); | |
5260325f | 747 | if (len <= 0) { |
748 | shutdown(sockets[i].fd, SHUT_RDWR); | |
749 | close(sockets[i].fd); | |
750 | sockets[i].type = AUTH_UNUSED; | |
0ac7199f | 751 | buffer_free(&sockets[i].input); |
752 | buffer_free(&sockets[i].output); | |
5260325f | 753 | break; |
754 | } | |
755 | buffer_consume(&sockets[i].output, len); | |
756 | } | |
757 | if (FD_ISSET(sockets[i].fd, readset)) { | |
bbc62e59 | 758 | do { |
759 | len = read(sockets[i].fd, buf, sizeof(buf)); | |
760 | if (len == -1 && (errno == EAGAIN || | |
761 | errno == EINTR)) | |
762 | continue; | |
763 | break; | |
764 | } while (1); | |
5260325f | 765 | if (len <= 0) { |
766 | shutdown(sockets[i].fd, SHUT_RDWR); | |
767 | close(sockets[i].fd); | |
768 | sockets[i].type = AUTH_UNUSED; | |
0ac7199f | 769 | buffer_free(&sockets[i].input); |
770 | buffer_free(&sockets[i].output); | |
5260325f | 771 | break; |
772 | } | |
773 | buffer_append(&sockets[i].input, buf, len); | |
774 | process_message(&sockets[i]); | |
775 | } | |
776 | break; | |
777 | default: | |
778 | fatal("Unknown type %d", sockets[i].type); | |
779 | } | |
8efc0c15 | 780 | } |
781 | ||
396c147e | 782 | static void |
dae3fa13 | 783 | cleanup_socket(void) |
784 | { | |
2f4b2e38 | 785 | if (socket_name[0]) |
786 | unlink(socket_name); | |
787 | if (socket_dir[0]) | |
788 | rmdir(socket_dir); | |
8efc0c15 | 789 | } |
790 | ||
396c147e | 791 | static void |
dae3fa13 | 792 | cleanup_exit(int i) |
793 | { | |
5260325f | 794 | cleanup_socket(); |
795 | exit(i); | |
dae3fa13 | 796 | } |
797 | ||
396c147e | 798 | static void |
2f4b2e38 | 799 | cleanup_handler(int sig) |
800 | { | |
801 | cleanup_socket(); | |
802 | _exit(2); | |
803 | } | |
804 | ||
7efa8482 | 805 | static void |
806 | check_parent_exists(int sig) | |
807 | { | |
808 | int save_errno = errno; | |
809 | ||
810 | if (parent_pid != -1 && kill(parent_pid, 0) < 0) { | |
811 | /* printf("Parent has died - Authentication agent exiting.\n"); */ | |
812 | cleanup_handler(sig); /* safe */ | |
813 | } | |
814 | signal(SIGALRM, check_parent_exists); | |
815 | alarm(10); | |
816 | errno = save_errno; | |
817 | } | |
818 | ||
396c147e | 819 | static void |
cc8aca8a | 820 | usage(void) |
dae3fa13 | 821 | { |
33e766d2 | 822 | fprintf(stderr, "Usage: %s [options] [command [args ...]]\n", |
0e3c1f95 | 823 | __progname); |
33e766d2 | 824 | fprintf(stderr, "Options:\n"); |
825 | fprintf(stderr, " -c Generate C-shell commands on stdout.\n"); | |
826 | fprintf(stderr, " -s Generate Bourne shell commands on stdout.\n"); | |
827 | fprintf(stderr, " -k Kill the current agent.\n"); | |
828 | fprintf(stderr, " -d Debug mode.\n"); | |
5260325f | 829 | exit(1); |
dae3fa13 | 830 | } |
831 | ||
8efc0c15 | 832 | int |
833 | main(int ac, char **av) | |
834 | { | |
e364646f | 835 | int sock, c_flag = 0, d_flag = 0, k_flag = 0, s_flag = 0, ch, nalloc; |
5260325f | 836 | struct sockaddr_un sunaddr; |
b03bd394 | 837 | #ifdef HAVE_SETRLIMIT |
0b6fbf03 | 838 | struct rlimit rlim; |
c7ccfd39 | 839 | #endif |
840 | #ifdef HAVE_CYGWIN | |
841 | int prev_mask; | |
b03bd394 | 842 | #endif |
5260325f | 843 | pid_t pid; |
844 | char *shell, *format, *pidstr, pidstrbuf[1 + 3 * sizeof pid]; | |
c04f75f1 | 845 | extern int optind; |
42f11eb2 | 846 | fd_set *readsetp = NULL, *writesetp = NULL; |
fcb975eb | 847 | |
457fc0c6 | 848 | SSLeay_add_all_algorithms(); |
849 | ||
260d427b | 850 | __progname = get_progname(av[0]); |
264dce47 | 851 | init_rng(); |
e339aa53 | 852 | seed_rng(); |
2b87da3b | 853 | |
4e577b89 | 854 | #ifdef __GNU_LIBRARY__ |
ffdb5d70 | 855 | while ((ch = getopt(ac, av, "+cdks")) != -1) { |
4e577b89 | 856 | #else /* __GNU_LIBRARY__ */ |
ffdb5d70 | 857 | while ((ch = getopt(ac, av, "cdks")) != -1) { |
4e577b89 | 858 | #endif /* __GNU_LIBRARY__ */ |
5260325f | 859 | switch (ch) { |
860 | case 'c': | |
861 | if (s_flag) | |
862 | usage(); | |
863 | c_flag++; | |
864 | break; | |
865 | case 'k': | |
866 | k_flag++; | |
867 | break; | |
868 | case 's': | |
869 | if (c_flag) | |
870 | usage(); | |
871 | s_flag++; | |
872 | break; | |
ffdb5d70 | 873 | case 'd': |
874 | if (d_flag) | |
875 | usage(); | |
876 | d_flag++; | |
877 | break; | |
5260325f | 878 | default: |
879 | usage(); | |
880 | } | |
dae3fa13 | 881 | } |
5260325f | 882 | ac -= optind; |
883 | av += optind; | |
884 | ||
ffdb5d70 | 885 | if (ac > 0 && (c_flag || k_flag || s_flag || d_flag)) |
5260325f | 886 | usage(); |
887 | ||
ffdb5d70 | 888 | if (ac == 0 && !c_flag && !k_flag && !s_flag && !d_flag) { |
5260325f | 889 | shell = getenv("SHELL"); |
890 | if (shell != NULL && strncmp(shell + strlen(shell) - 3, "csh", 3) == 0) | |
891 | c_flag = 1; | |
dae3fa13 | 892 | } |
5260325f | 893 | if (k_flag) { |
894 | pidstr = getenv(SSH_AGENTPID_ENV_NAME); | |
895 | if (pidstr == NULL) { | |
896 | fprintf(stderr, "%s not set, cannot kill agent\n", | |
42f11eb2 | 897 | SSH_AGENTPID_ENV_NAME); |
5260325f | 898 | exit(1); |
899 | } | |
900 | pid = atoi(pidstr); | |
42f11eb2 | 901 | if (pid < 1) { |
5260325f | 902 | fprintf(stderr, "%s=\"%s\", which is not a good PID\n", |
42f11eb2 | 903 | SSH_AGENTPID_ENV_NAME, pidstr); |
5260325f | 904 | exit(1); |
905 | } | |
906 | if (kill(pid, SIGTERM) == -1) { | |
907 | perror("kill"); | |
908 | exit(1); | |
909 | } | |
910 | format = c_flag ? "unsetenv %s;\n" : "unset %s;\n"; | |
911 | printf(format, SSH_AUTHSOCKET_ENV_NAME); | |
912 | printf(format, SSH_AGENTPID_ENV_NAME); | |
913 | printf("echo Agent pid %d killed;\n", pid); | |
914 | exit(0); | |
dae3fa13 | 915 | } |
5260325f | 916 | parent_pid = getpid(); |
917 | ||
918 | /* Create private directory for agent socket */ | |
919 | strlcpy(socket_dir, "/tmp/ssh-XXXXXXXX", sizeof socket_dir); | |
920 | if (mkdtemp(socket_dir) == NULL) { | |
921 | perror("mkdtemp: private socket dir"); | |
922 | exit(1); | |
923 | } | |
924 | snprintf(socket_name, sizeof socket_name, "%s/agent.%d", socket_dir, | |
42f11eb2 | 925 | parent_pid); |
5260325f | 926 | |
aa3378df | 927 | /* |
928 | * Create socket early so it will exist before command gets run from | |
929 | * the parent. | |
930 | */ | |
5260325f | 931 | sock = socket(AF_UNIX, SOCK_STREAM, 0); |
932 | if (sock < 0) { | |
933 | perror("socket"); | |
934 | cleanup_exit(1); | |
935 | } | |
936 | memset(&sunaddr, 0, sizeof(sunaddr)); | |
937 | sunaddr.sun_family = AF_UNIX; | |
938 | strlcpy(sunaddr.sun_path, socket_name, sizeof(sunaddr.sun_path)); | |
c7ccfd39 | 939 | #ifdef HAVE_CYGWIN |
940 | prev_mask = umask(0177); | |
941 | #endif | |
5260325f | 942 | if (bind(sock, (struct sockaddr *) & sunaddr, sizeof(sunaddr)) < 0) { |
943 | perror("bind"); | |
c7ccfd39 | 944 | #ifdef HAVE_CYGWIN |
945 | umask(prev_mask); | |
946 | #endif | |
5260325f | 947 | cleanup_exit(1); |
948 | } | |
c7ccfd39 | 949 | #ifdef HAVE_CYGWIN |
950 | umask(prev_mask); | |
951 | #endif | |
5260325f | 952 | if (listen(sock, 5) < 0) { |
953 | perror("listen"); | |
954 | cleanup_exit(1); | |
dae3fa13 | 955 | } |
42f11eb2 | 956 | |
aa3378df | 957 | /* |
958 | * Fork, and have the parent execute the command, if any, or present | |
959 | * the socket data. The child continues as the authentication agent. | |
960 | */ | |
ffdb5d70 | 961 | if (d_flag) { |
962 | log_init(__progname, SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 1); | |
963 | format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n"; | |
964 | printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name, | |
965 | SSH_AUTHSOCKET_ENV_NAME); | |
966 | printf("echo Agent pid %d;\n", parent_pid); | |
967 | goto skip; | |
968 | } | |
5260325f | 969 | pid = fork(); |
970 | if (pid == -1) { | |
971 | perror("fork"); | |
972 | exit(1); | |
dae3fa13 | 973 | } |
5260325f | 974 | if (pid != 0) { /* Parent - execute the given command. */ |
975 | close(sock); | |
976 | snprintf(pidstrbuf, sizeof pidstrbuf, "%d", pid); | |
977 | if (ac == 0) { | |
978 | format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n"; | |
979 | printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name, | |
42f11eb2 | 980 | SSH_AUTHSOCKET_ENV_NAME); |
5260325f | 981 | printf(format, SSH_AGENTPID_ENV_NAME, pidstrbuf, |
42f11eb2 | 982 | SSH_AGENTPID_ENV_NAME); |
5260325f | 983 | printf("echo Agent pid %d;\n", pid); |
984 | exit(0); | |
985 | } | |
bcbf86ec | 986 | if (setenv(SSH_AUTHSOCKET_ENV_NAME, socket_name, 1) == -1 || |
987 | setenv(SSH_AGENTPID_ENV_NAME, pidstrbuf, 1) == -1) { | |
988 | perror("setenv"); | |
989 | exit(1); | |
990 | } | |
5260325f | 991 | execvp(av[0], av); |
992 | perror(av[0]); | |
993 | exit(1); | |
994 | } | |
ec9f3450 | 995 | |
996 | if (setsid() == -1) { | |
997 | perror("setsid"); | |
998 | cleanup_exit(1); | |
999 | } | |
1000 | ||
1001 | (void)chdir("/"); | |
5260325f | 1002 | close(0); |
1003 | close(1); | |
1004 | close(2); | |
dae3fa13 | 1005 | |
b03bd394 | 1006 | #ifdef HAVE_SETRLIMIT |
0b6fbf03 | 1007 | /* deny core dumps, since memory contains unencrypted private keys */ |
1008 | rlim.rlim_cur = rlim.rlim_max = 0; | |
1009 | if (setrlimit(RLIMIT_CORE, &rlim) < 0) { | |
1010 | perror("setrlimit rlimit_core failed"); | |
1011 | cleanup_exit(1); | |
1012 | } | |
b03bd394 | 1013 | #endif |
ffdb5d70 | 1014 | |
1015 | skip: | |
5260325f | 1016 | if (atexit(cleanup_socket) < 0) { |
1017 | perror("atexit"); | |
1018 | cleanup_exit(1); | |
1019 | } | |
1020 | new_socket(AUTH_SOCKET, sock); | |
1021 | if (ac > 0) { | |
1022 | signal(SIGALRM, check_parent_exists); | |
1023 | alarm(10); | |
1024 | } | |
2e73a022 | 1025 | idtab_init(); |
1ee482c5 | 1026 | if (!d_flag) |
ffdb5d70 | 1027 | signal(SIGINT, SIG_IGN); |
1ee482c5 | 1028 | signal(SIGPIPE, SIG_IGN); |
2f4b2e38 | 1029 | signal(SIGHUP, cleanup_handler); |
1030 | signal(SIGTERM, cleanup_handler); | |
e364646f | 1031 | nalloc = 0; |
1032 | ||
5260325f | 1033 | while (1) { |
e364646f | 1034 | prepare_select(&readsetp, &writesetp, &max_fd, &nalloc); |
42f11eb2 | 1035 | if (select(max_fd + 1, readsetp, writesetp, NULL, NULL) < 0) { |
5260325f | 1036 | if (errno == EINTR) |
1037 | continue; | |
1038 | exit(1); | |
1039 | } | |
42f11eb2 | 1040 | after_select(readsetp, writesetp); |
8efc0c15 | 1041 | } |
5260325f | 1042 | /* NOTREACHED */ |
8efc0c15 | 1043 | } |