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184eed6a | 1 | /* $OpenBSD: ssh-agent.c,v 1.75 2001/12/19 07:18:56 deraadt 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" | |
184eed6a | 39 | RCSID("$OpenBSD: ssh-agent.c,v 1.75 2001/12/19 07:18:56 deraadt Exp $"); |
42f11eb2 | 40 | |
41 | #include <openssl/evp.h> | |
42 | #include <openssl/md5.h> | |
8efc0c15 | 43 | |
44 | #include "ssh.h" | |
45 | #include "rsa.h" | |
8efc0c15 | 46 | #include "buffer.h" |
47 | #include "bufaux.h" | |
48 | #include "xmalloc.h" | |
49 | #include "packet.h" | |
50 | #include "getput.h" | |
51 | #include "mpaux.h" | |
4c8722d9 | 52 | #include "key.h" |
53 | #include "authfd.h" | |
42f11eb2 | 54 | #include "cipher.h" |
2e73a022 | 55 | #include "kex.h" |
188adeb2 | 56 | #include "compat.h" |
42f11eb2 | 57 | #include "log.h" |
8efc0c15 | 58 | |
2b5fe3b8 | 59 | #ifdef SMARTCARD |
60 | #include <openssl/engine.h> | |
61 | #include "scard.h" | |
dd2495cb | 62 | #endif |
2b5fe3b8 | 63 | |
17a3011c | 64 | typedef enum { |
65 | AUTH_UNUSED, | |
66 | AUTH_SOCKET, | |
67 | AUTH_CONNECTION | |
68 | } sock_type; | |
69 | ||
5260325f | 70 | typedef struct { |
71 | int fd; | |
17a3011c | 72 | sock_type type; |
5260325f | 73 | Buffer input; |
74 | Buffer output; | |
8efc0c15 | 75 | } SocketEntry; |
76 | ||
1e3b8b07 | 77 | u_int sockets_alloc = 0; |
8efc0c15 | 78 | SocketEntry *sockets = NULL; |
79 | ||
5260325f | 80 | typedef struct { |
2e73a022 | 81 | Key *key; |
5260325f | 82 | char *comment; |
8efc0c15 | 83 | } Identity; |
84 | ||
2e73a022 | 85 | typedef struct { |
86 | int nentries; | |
87 | Identity *identities; | |
88 | } Idtab; | |
89 | ||
90 | /* private key table, one per protocol version */ | |
91 | Idtab idtable[3]; | |
8efc0c15 | 92 | |
93 | int max_fd = 0; | |
94 | ||
95 | /* pid of shell == parent of agent */ | |
9da5c3c9 | 96 | pid_t parent_pid = -1; |
8efc0c15 | 97 | |
98 | /* pathname and directory for AUTH_SOCKET */ | |
99 | char socket_name[1024]; | |
100 | char socket_dir[1024]; | |
101 | ||
5260325f | 102 | #ifdef HAVE___PROGNAME |
103 | extern char *__progname; | |
260d427b | 104 | #else |
105 | char *__progname; | |
106 | #endif | |
5260325f | 107 | |
396c147e | 108 | static void |
2e73a022 | 109 | idtab_init(void) |
110 | { | |
111 | int i; | |
6aacefa7 | 112 | for (i = 0; i <=2; i++) { |
2e73a022 | 113 | idtable[i].identities = NULL; |
114 | idtable[i].nentries = 0; | |
115 | } | |
116 | } | |
117 | ||
118 | /* return private key table for requested protocol version */ | |
396c147e | 119 | static Idtab * |
2e73a022 | 120 | idtab_lookup(int version) |
121 | { | |
122 | if (version < 1 || version > 2) | |
123 | fatal("internal error, bad protocol version %d", version); | |
124 | return &idtable[version]; | |
125 | } | |
126 | ||
127 | /* return matching private key for given public key */ | |
396c147e | 128 | static Key * |
2e73a022 | 129 | lookup_private_key(Key *key, int *idx, int version) |
130 | { | |
131 | int i; | |
132 | Idtab *tab = idtab_lookup(version); | |
133 | for (i = 0; i < tab->nentries; i++) { | |
134 | if (key_equal(key, tab->identities[i].key)) { | |
135 | if (idx != NULL) | |
136 | *idx = i; | |
137 | return tab->identities[i].key; | |
138 | } | |
139 | } | |
140 | return NULL; | |
141 | } | |
142 | ||
143 | /* send list of supported public keys to 'client' */ | |
396c147e | 144 | static void |
2e73a022 | 145 | process_request_identities(SocketEntry *e, int version) |
8efc0c15 | 146 | { |
2e73a022 | 147 | Idtab *tab = idtab_lookup(version); |
5260325f | 148 | Buffer msg; |
149 | int i; | |
150 | ||
151 | buffer_init(&msg); | |
2e73a022 | 152 | buffer_put_char(&msg, (version == 1) ? |
153 | SSH_AGENT_RSA_IDENTITIES_ANSWER : SSH2_AGENT_IDENTITIES_ANSWER); | |
154 | buffer_put_int(&msg, tab->nentries); | |
155 | for (i = 0; i < tab->nentries; i++) { | |
156 | Identity *id = &tab->identities[i]; | |
fa08c86b | 157 | if (id->key->type == KEY_RSA1) { |
2e73a022 | 158 | buffer_put_int(&msg, BN_num_bits(id->key->rsa->n)); |
159 | buffer_put_bignum(&msg, id->key->rsa->e); | |
160 | buffer_put_bignum(&msg, id->key->rsa->n); | |
161 | } else { | |
1e3b8b07 | 162 | u_char *blob; |
163 | u_int blen; | |
fa08c86b | 164 | key_to_blob(id->key, &blob, &blen); |
2e73a022 | 165 | buffer_put_string(&msg, blob, blen); |
166 | xfree(blob); | |
167 | } | |
168 | buffer_put_cstring(&msg, id->comment); | |
5260325f | 169 | } |
170 | buffer_put_int(&e->output, buffer_len(&msg)); | |
171 | buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg)); | |
172 | buffer_free(&msg); | |
8efc0c15 | 173 | } |
174 | ||
2e73a022 | 175 | /* ssh1 only */ |
396c147e | 176 | static void |
2e73a022 | 177 | process_authentication_challenge1(SocketEntry *e) |
8efc0c15 | 178 | { |
2e73a022 | 179 | Key *key, *private; |
180 | BIGNUM *challenge; | |
181 | int i, len; | |
5260325f | 182 | Buffer msg; |
183 | MD5_CTX md; | |
1e3b8b07 | 184 | u_char buf[32], mdbuf[16], session_id[16]; |
185 | u_int response_type; | |
5260325f | 186 | |
187 | buffer_init(&msg); | |
fa08c86b | 188 | key = key_new(KEY_RSA1); |
5260325f | 189 | challenge = BN_new(); |
5260325f | 190 | |
2e73a022 | 191 | buffer_get_int(&e->input); /* ignored */ |
192 | buffer_get_bignum(&e->input, key->rsa->e); | |
193 | buffer_get_bignum(&e->input, key->rsa->n); | |
194 | buffer_get_bignum(&e->input, challenge); | |
5260325f | 195 | |
2e73a022 | 196 | /* Only protocol 1.1 is supported */ |
197 | if (buffer_len(&e->input) == 0) | |
198 | goto failure; | |
199 | buffer_get(&e->input, (char *) session_id, 16); | |
200 | response_type = buffer_get_int(&e->input); | |
201 | if (response_type != 1) | |
202 | goto failure; | |
203 | ||
204 | private = lookup_private_key(key, NULL, 1); | |
205 | if (private != NULL) { | |
206 | /* Decrypt the challenge using the private key. */ | |
46aa2d1f | 207 | if (rsa_private_decrypt(challenge, challenge, private->rsa) <= 0) |
208 | goto failure; | |
2e73a022 | 209 | |
210 | /* The response is MD5 of decrypted challenge plus session id. */ | |
211 | len = BN_num_bytes(challenge); | |
212 | if (len <= 0 || len > 32) { | |
213 | log("process_authentication_challenge: bad challenge length %d", len); | |
214 | goto failure; | |
5260325f | 215 | } |
2e73a022 | 216 | memset(buf, 0, 32); |
217 | BN_bn2bin(challenge, buf + 32 - len); | |
218 | MD5_Init(&md); | |
219 | MD5_Update(&md, buf, 32); | |
220 | MD5_Update(&md, session_id, 16); | |
221 | MD5_Final(mdbuf, &md); | |
222 | ||
223 | /* Send the response. */ | |
224 | buffer_put_char(&msg, SSH_AGENT_RSA_RESPONSE); | |
225 | for (i = 0; i < 16; i++) | |
226 | buffer_put_char(&msg, mdbuf[i]); | |
227 | goto send; | |
228 | } | |
229 | ||
230 | failure: | |
231 | /* Unknown identity or protocol error. Send failure. */ | |
5260325f | 232 | buffer_put_char(&msg, SSH_AGENT_FAILURE); |
233 | send: | |
2e73a022 | 234 | buffer_put_int(&e->output, buffer_len(&msg)); |
235 | buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg)); | |
236 | key_free(key); | |
237 | BN_clear_free(challenge); | |
238 | buffer_free(&msg); | |
239 | } | |
240 | ||
241 | /* ssh2 only */ | |
396c147e | 242 | static void |
2e73a022 | 243 | process_sign_request2(SocketEntry *e) |
244 | { | |
245 | extern int datafellows; | |
246 | Key *key, *private; | |
1e3b8b07 | 247 | u_char *blob, *data, *signature = NULL; |
248 | u_int blen, dlen, slen = 0; | |
188adeb2 | 249 | int flags; |
2e73a022 | 250 | Buffer msg; |
251 | int ok = -1; | |
252 | ||
253 | datafellows = 0; | |
227e8e86 | 254 | |
2e73a022 | 255 | blob = buffer_get_string(&e->input, &blen); |
256 | data = buffer_get_string(&e->input, &dlen); | |
188adeb2 | 257 | |
258 | flags = buffer_get_int(&e->input); | |
259 | if (flags & SSH_AGENT_OLD_SIGNATURE) | |
260 | datafellows = SSH_BUG_SIGBLOB; | |
2e73a022 | 261 | |
fa08c86b | 262 | key = key_from_blob(blob, blen); |
2e73a022 | 263 | if (key != NULL) { |
264 | private = lookup_private_key(key, NULL, 2); | |
265 | if (private != NULL) | |
fa08c86b | 266 | ok = key_sign(private, &signature, &slen, data, dlen); |
2e73a022 | 267 | } |
268 | key_free(key); | |
269 | buffer_init(&msg); | |
270 | if (ok == 0) { | |
271 | buffer_put_char(&msg, SSH2_AGENT_SIGN_RESPONSE); | |
272 | buffer_put_string(&msg, signature, slen); | |
273 | } else { | |
274 | buffer_put_char(&msg, SSH_AGENT_FAILURE); | |
275 | } | |
5260325f | 276 | buffer_put_int(&e->output, buffer_len(&msg)); |
277 | buffer_append(&e->output, buffer_ptr(&msg), | |
2e73a022 | 278 | buffer_len(&msg)); |
5260325f | 279 | buffer_free(&msg); |
2e73a022 | 280 | xfree(data); |
281 | xfree(blob); | |
282 | if (signature != NULL) | |
283 | xfree(signature); | |
8efc0c15 | 284 | } |
285 | ||
2e73a022 | 286 | /* shared */ |
396c147e | 287 | static void |
2e73a022 | 288 | process_remove_identity(SocketEntry *e, int version) |
8efc0c15 | 289 | { |
2e73a022 | 290 | Key *key = NULL, *private; |
1e3b8b07 | 291 | u_char *blob; |
292 | u_int blen; | |
293 | u_int bits; | |
2e73a022 | 294 | int success = 0; |
295 | ||
6aacefa7 | 296 | switch (version) { |
2e73a022 | 297 | case 1: |
fa08c86b | 298 | key = key_new(KEY_RSA1); |
2e73a022 | 299 | bits = buffer_get_int(&e->input); |
300 | buffer_get_bignum(&e->input, key->rsa->e); | |
301 | buffer_get_bignum(&e->input, key->rsa->n); | |
302 | ||
303 | if (bits != key_size(key)) | |
304 | log("Warning: identity keysize mismatch: actual %d, announced %d", | |
42f11eb2 | 305 | key_size(key), bits); |
2e73a022 | 306 | break; |
307 | case 2: | |
308 | blob = buffer_get_string(&e->input, &blen); | |
fa08c86b | 309 | key = key_from_blob(blob, blen); |
2e73a022 | 310 | xfree(blob); |
311 | break; | |
312 | } | |
313 | if (key != NULL) { | |
314 | int idx; | |
315 | private = lookup_private_key(key, &idx, version); | |
316 | if (private != NULL) { | |
aa3378df | 317 | /* |
318 | * We have this key. Free the old key. Since we | |
319 | * don\'t want to leave empty slots in the middle of | |
d343d900 | 320 | * the array, we actually free the key there and move |
321 | * all the entries between the empty slot and the end | |
322 | * of the array. | |
aa3378df | 323 | */ |
2e73a022 | 324 | Idtab *tab = idtab_lookup(version); |
325 | key_free(tab->identities[idx].key); | |
326 | xfree(tab->identities[idx].comment); | |
fa08c86b | 327 | if (tab->nentries < 1) |
328 | fatal("process_remove_identity: " | |
329 | "internal error: tab->nentries %d", | |
330 | tab->nentries); | |
d343d900 | 331 | if (idx != tab->nentries - 1) { |
332 | int i; | |
333 | for (i = idx; i < tab->nentries - 1; i++) | |
334 | tab->identities[i] = tab->identities[i+1]; | |
335 | } | |
336 | tab->identities[tab->nentries - 1].key = NULL; | |
337 | tab->identities[tab->nentries - 1].comment = NULL; | |
2e73a022 | 338 | tab->nentries--; |
339 | success = 1; | |
5260325f | 340 | } |
2e73a022 | 341 | key_free(key); |
342 | } | |
8efc0c15 | 343 | buffer_put_int(&e->output, 1); |
2e73a022 | 344 | buffer_put_char(&e->output, |
345 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
8efc0c15 | 346 | } |
347 | ||
396c147e | 348 | static void |
2e73a022 | 349 | process_remove_all_identities(SocketEntry *e, int version) |
8efc0c15 | 350 | { |
1e3b8b07 | 351 | u_int i; |
2e73a022 | 352 | Idtab *tab = idtab_lookup(version); |
8efc0c15 | 353 | |
5260325f | 354 | /* Loop over all identities and clear the keys. */ |
2e73a022 | 355 | for (i = 0; i < tab->nentries; i++) { |
356 | key_free(tab->identities[i].key); | |
357 | xfree(tab->identities[i].comment); | |
5260325f | 358 | } |
8efc0c15 | 359 | |
5260325f | 360 | /* Mark that there are no identities. */ |
2e73a022 | 361 | tab->nentries = 0; |
8efc0c15 | 362 | |
363 | /* Send success. */ | |
364 | buffer_put_int(&e->output, 1); | |
365 | buffer_put_char(&e->output, SSH_AGENT_SUCCESS); | |
366 | return; | |
5260325f | 367 | } |
368 | ||
396c147e | 369 | static void |
fa08c86b | 370 | process_add_identity(SocketEntry *e, int version) |
371 | { | |
372 | Key *k = NULL; | |
373 | char *type_name; | |
2e73a022 | 374 | char *comment; |
fa08c86b | 375 | int type, success = 0; |
2e73a022 | 376 | Idtab *tab = idtab_lookup(version); |
5260325f | 377 | |
2e73a022 | 378 | switch (version) { |
379 | case 1: | |
fa08c86b | 380 | k = key_new_private(KEY_RSA1); |
42f11eb2 | 381 | buffer_get_int(&e->input); /* ignored */ |
fa08c86b | 382 | buffer_get_bignum(&e->input, k->rsa->n); |
383 | buffer_get_bignum(&e->input, k->rsa->e); | |
384 | buffer_get_bignum(&e->input, k->rsa->d); | |
385 | buffer_get_bignum(&e->input, k->rsa->iqmp); | |
2e73a022 | 386 | |
387 | /* SSH and SSL have p and q swapped */ | |
fa08c86b | 388 | buffer_get_bignum(&e->input, k->rsa->q); /* p */ |
389 | buffer_get_bignum(&e->input, k->rsa->p); /* q */ | |
2e73a022 | 390 | |
391 | /* Generate additional parameters */ | |
2b63e803 | 392 | rsa_generate_additional_parameters(k->rsa); |
2e73a022 | 393 | break; |
394 | case 2: | |
fa08c86b | 395 | type_name = buffer_get_string(&e->input, NULL); |
42f11eb2 | 396 | type = key_type_from_name(type_name); |
fa08c86b | 397 | xfree(type_name); |
6aacefa7 | 398 | switch (type) { |
fa08c86b | 399 | case KEY_DSA: |
400 | k = key_new_private(type); | |
401 | buffer_get_bignum2(&e->input, k->dsa->p); | |
402 | buffer_get_bignum2(&e->input, k->dsa->q); | |
403 | buffer_get_bignum2(&e->input, k->dsa->g); | |
404 | buffer_get_bignum2(&e->input, k->dsa->pub_key); | |
405 | buffer_get_bignum2(&e->input, k->dsa->priv_key); | |
406 | break; | |
407 | case KEY_RSA: | |
408 | k = key_new_private(type); | |
409 | buffer_get_bignum2(&e->input, k->rsa->n); | |
410 | buffer_get_bignum2(&e->input, k->rsa->e); | |
411 | buffer_get_bignum2(&e->input, k->rsa->d); | |
412 | buffer_get_bignum2(&e->input, k->rsa->iqmp); | |
413 | buffer_get_bignum2(&e->input, k->rsa->p); | |
414 | buffer_get_bignum2(&e->input, k->rsa->q); | |
415 | ||
416 | /* Generate additional parameters */ | |
2b63e803 | 417 | rsa_generate_additional_parameters(k->rsa); |
fa08c86b | 418 | break; |
419 | default: | |
2e73a022 | 420 | buffer_clear(&e->input); |
2e73a022 | 421 | goto send; |
5260325f | 422 | } |
2e73a022 | 423 | break; |
424 | } | |
2e73a022 | 425 | comment = buffer_get_string(&e->input, NULL); |
426 | if (k == NULL) { | |
427 | xfree(comment); | |
428 | goto send; | |
429 | } | |
430 | success = 1; | |
431 | if (lookup_private_key(k, NULL, version) == NULL) { | |
432 | if (tab->nentries == 0) | |
433 | tab->identities = xmalloc(sizeof(Identity)); | |
434 | else | |
435 | tab->identities = xrealloc(tab->identities, | |
436 | (tab->nentries + 1) * sizeof(Identity)); | |
437 | tab->identities[tab->nentries].key = k; | |
438 | tab->identities[tab->nentries].comment = comment; | |
439 | /* Increment the number of identities. */ | |
440 | tab->nentries++; | |
441 | } else { | |
442 | key_free(k); | |
443 | xfree(comment); | |
444 | } | |
445 | send: | |
5260325f | 446 | buffer_put_int(&e->output, 1); |
2e73a022 | 447 | buffer_put_char(&e->output, |
448 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
8efc0c15 | 449 | } |
450 | ||
2b5fe3b8 | 451 | |
452 | #ifdef SMARTCARD | |
453 | static void | |
454 | process_add_smartcard_key (SocketEntry *e) | |
455 | { | |
456 | Idtab *tab; | |
457 | Key *n = NULL, *k = NULL; | |
9ff6f66f | 458 | char *sc_reader_id = NULL; |
2b5fe3b8 | 459 | int success = 0; |
184eed6a | 460 | |
9ff6f66f | 461 | sc_reader_id = buffer_get_string(&e->input, NULL); |
462 | k = sc_get_key(sc_reader_id); | |
463 | xfree(sc_reader_id); | |
2b5fe3b8 | 464 | |
2b5fe3b8 | 465 | if (k == NULL) { |
466 | error("sc_get_pubkey failed"); | |
467 | goto send; | |
468 | } | |
469 | success = 1; | |
470 | ||
471 | tab = idtab_lookup(1); | |
a0e0f486 | 472 | k->type = KEY_RSA1; |
2b5fe3b8 | 473 | if (lookup_private_key(k, NULL, 1) == NULL) { |
474 | if (tab->nentries == 0) | |
475 | tab->identities = xmalloc(sizeof(Identity)); | |
476 | else | |
477 | tab->identities = xrealloc(tab->identities, | |
478 | (tab->nentries + 1) * sizeof(Identity)); | |
479 | n = key_new(KEY_RSA1); | |
480 | BN_copy(n->rsa->n, k->rsa->n); | |
481 | BN_copy(n->rsa->e, k->rsa->e); | |
482 | RSA_set_method(n->rsa, sc_get_engine()); | |
483 | tab->identities[tab->nentries].key = n; | |
484 | tab->identities[tab->nentries].comment = | |
485 | xstrdup("rsa1 smartcard"); | |
486 | tab->nentries++; | |
487 | } | |
a0e0f486 | 488 | k->type = KEY_RSA; |
2b5fe3b8 | 489 | tab = idtab_lookup(2); |
490 | if (lookup_private_key(k, NULL, 2) == NULL) { | |
491 | if (tab->nentries == 0) | |
492 | tab->identities = xmalloc(sizeof(Identity)); | |
493 | else | |
494 | tab->identities = xrealloc(tab->identities, | |
495 | (tab->nentries + 1) * sizeof(Identity)); | |
496 | n = key_new(KEY_RSA); | |
497 | BN_copy(n->rsa->n, k->rsa->n); | |
498 | BN_copy(n->rsa->e, k->rsa->e); | |
499 | RSA_set_method(n->rsa, sc_get_engine()); | |
500 | tab->identities[tab->nentries].key = n; | |
501 | tab->identities[tab->nentries].comment = | |
502 | xstrdup("rsa smartcard"); | |
503 | tab->nentries++; | |
504 | } | |
505 | key_free(k); | |
506 | send: | |
507 | buffer_put_int(&e->output, 1); | |
508 | buffer_put_char(&e->output, | |
509 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
510 | } | |
511 | ||
512 | static void | |
513 | process_remove_smartcard_key(SocketEntry *e) | |
514 | { | |
515 | Key *k = NULL, *private; | |
516 | int idx; | |
517 | int success = 0; | |
9ff6f66f | 518 | char *sc_reader_id = NULL; |
2b5fe3b8 | 519 | |
9ff6f66f | 520 | sc_reader_id = buffer_get_string(&e->input, NULL); |
521 | k = sc_get_key(sc_reader_id); | |
522 | xfree(sc_reader_id); | |
2b5fe3b8 | 523 | |
9ff6f66f | 524 | if (k == NULL) { |
2b5fe3b8 | 525 | error("sc_get_pubkey failed"); |
526 | } else { | |
77261db4 | 527 | k->type = KEY_RSA1; |
2b5fe3b8 | 528 | private = lookup_private_key(k, &idx, 1); |
529 | if (private != NULL) { | |
530 | Idtab *tab = idtab_lookup(1); | |
531 | key_free(tab->identities[idx].key); | |
532 | xfree(tab->identities[idx].comment); | |
533 | if (idx != tab->nentries) | |
534 | tab->identities[idx] = tab->identities[tab->nentries]; | |
535 | tab->nentries--; | |
536 | success = 1; | |
537 | } | |
77261db4 | 538 | k->type = KEY_RSA; |
2b5fe3b8 | 539 | private = lookup_private_key(k, &idx, 2); |
540 | if (private != NULL) { | |
541 | Idtab *tab = idtab_lookup(2); | |
542 | key_free(tab->identities[idx].key); | |
543 | xfree(tab->identities[idx].comment); | |
544 | if (idx != tab->nentries) | |
545 | tab->identities[idx] = tab->identities[tab->nentries]; | |
546 | tab->nentries--; | |
547 | success = 1; | |
548 | } | |
549 | key_free(k); | |
550 | } | |
551 | ||
552 | buffer_put_int(&e->output, 1); | |
553 | buffer_put_char(&e->output, | |
554 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
555 | } | |
3e984472 | 556 | #endif /* SMARTCARD */ |
2b5fe3b8 | 557 | |
2e73a022 | 558 | /* dispatch incoming messages */ |
559 | ||
396c147e | 560 | static void |
8efc0c15 | 561 | process_message(SocketEntry *e) |
562 | { | |
1e3b8b07 | 563 | u_int msg_len; |
564 | u_int type; | |
565 | u_char *cp; | |
5260325f | 566 | if (buffer_len(&e->input) < 5) |
567 | return; /* Incomplete message. */ | |
1e3b8b07 | 568 | cp = (u_char *) buffer_ptr(&e->input); |
5260325f | 569 | msg_len = GET_32BIT(cp); |
570 | if (msg_len > 256 * 1024) { | |
571 | shutdown(e->fd, SHUT_RDWR); | |
572 | close(e->fd); | |
573 | e->type = AUTH_UNUSED; | |
574 | return; | |
575 | } | |
576 | if (buffer_len(&e->input) < msg_len + 4) | |
577 | return; | |
578 | buffer_consume(&e->input, 4); | |
579 | type = buffer_get_char(&e->input); | |
580 | ||
2b5fe3b8 | 581 | debug("type %d", type); |
5260325f | 582 | switch (type) { |
2e73a022 | 583 | /* ssh1 */ |
5260325f | 584 | case SSH_AGENTC_RSA_CHALLENGE: |
2e73a022 | 585 | process_authentication_challenge1(e); |
586 | break; | |
587 | case SSH_AGENTC_REQUEST_RSA_IDENTITIES: | |
588 | process_request_identities(e, 1); | |
5260325f | 589 | break; |
590 | case SSH_AGENTC_ADD_RSA_IDENTITY: | |
2e73a022 | 591 | process_add_identity(e, 1); |
5260325f | 592 | break; |
593 | case SSH_AGENTC_REMOVE_RSA_IDENTITY: | |
2e73a022 | 594 | process_remove_identity(e, 1); |
5260325f | 595 | break; |
596 | case SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES: | |
2e73a022 | 597 | process_remove_all_identities(e, 1); |
598 | break; | |
599 | /* ssh2 */ | |
600 | case SSH2_AGENTC_SIGN_REQUEST: | |
601 | process_sign_request2(e); | |
602 | break; | |
603 | case SSH2_AGENTC_REQUEST_IDENTITIES: | |
604 | process_request_identities(e, 2); | |
605 | break; | |
606 | case SSH2_AGENTC_ADD_IDENTITY: | |
607 | process_add_identity(e, 2); | |
608 | break; | |
609 | case SSH2_AGENTC_REMOVE_IDENTITY: | |
610 | process_remove_identity(e, 2); | |
611 | break; | |
612 | case SSH2_AGENTC_REMOVE_ALL_IDENTITIES: | |
613 | process_remove_all_identities(e, 2); | |
5260325f | 614 | break; |
2b5fe3b8 | 615 | #ifdef SMARTCARD |
616 | case SSH_AGENTC_ADD_SMARTCARD_KEY: | |
617 | process_add_smartcard_key(e); | |
184eed6a | 618 | break; |
2b5fe3b8 | 619 | case SSH_AGENTC_REMOVE_SMARTCARD_KEY: |
620 | process_remove_smartcard_key(e); | |
184eed6a | 621 | break; |
3e984472 | 622 | #endif /* SMARTCARD */ |
5260325f | 623 | default: |
624 | /* Unknown message. Respond with failure. */ | |
625 | error("Unknown message %d", type); | |
626 | buffer_clear(&e->input); | |
627 | buffer_put_int(&e->output, 1); | |
628 | buffer_put_char(&e->output, SSH_AGENT_FAILURE); | |
629 | break; | |
630 | } | |
8efc0c15 | 631 | } |
632 | ||
396c147e | 633 | static void |
17a3011c | 634 | new_socket(sock_type type, int fd) |
8efc0c15 | 635 | { |
1e3b8b07 | 636 | u_int i, old_alloc; |
5260325f | 637 | if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) |
638 | error("fcntl O_NONBLOCK: %s", strerror(errno)); | |
639 | ||
640 | if (fd > max_fd) | |
641 | max_fd = fd; | |
642 | ||
643 | for (i = 0; i < sockets_alloc; i++) | |
644 | if (sockets[i].type == AUTH_UNUSED) { | |
645 | sockets[i].fd = fd; | |
646 | sockets[i].type = type; | |
647 | buffer_init(&sockets[i].input); | |
648 | buffer_init(&sockets[i].output); | |
649 | return; | |
650 | } | |
651 | old_alloc = sockets_alloc; | |
652 | sockets_alloc += 10; | |
653 | if (sockets) | |
654 | sockets = xrealloc(sockets, sockets_alloc * sizeof(sockets[0])); | |
655 | else | |
656 | sockets = xmalloc(sockets_alloc * sizeof(sockets[0])); | |
657 | for (i = old_alloc; i < sockets_alloc; i++) | |
658 | sockets[i].type = AUTH_UNUSED; | |
659 | sockets[old_alloc].type = type; | |
660 | sockets[old_alloc].fd = fd; | |
661 | buffer_init(&sockets[old_alloc].input); | |
662 | buffer_init(&sockets[old_alloc].output); | |
8efc0c15 | 663 | } |
664 | ||
396c147e | 665 | static int |
e364646f | 666 | prepare_select(fd_set **fdrp, fd_set **fdwp, int *fdl, int *nallocp) |
8efc0c15 | 667 | { |
42f11eb2 | 668 | u_int i, sz; |
669 | int n = 0; | |
670 | ||
671 | for (i = 0; i < sockets_alloc; i++) { | |
5260325f | 672 | switch (sockets[i].type) { |
673 | case AUTH_SOCKET: | |
674 | case AUTH_CONNECTION: | |
42f11eb2 | 675 | n = MAX(n, sockets[i].fd); |
5260325f | 676 | break; |
677 | case AUTH_UNUSED: | |
678 | break; | |
679 | default: | |
680 | fatal("Unknown socket type %d", sockets[i].type); | |
681 | break; | |
682 | } | |
42f11eb2 | 683 | } |
684 | ||
685 | sz = howmany(n+1, NFDBITS) * sizeof(fd_mask); | |
e364646f | 686 | if (*fdrp == NULL || sz > *nallocp) { |
42f11eb2 | 687 | if (*fdrp) |
894c5fa6 | 688 | xfree(*fdrp); |
42f11eb2 | 689 | if (*fdwp) |
894c5fa6 | 690 | xfree(*fdwp); |
42f11eb2 | 691 | *fdrp = xmalloc(sz); |
692 | *fdwp = xmalloc(sz); | |
e364646f | 693 | *nallocp = sz; |
42f11eb2 | 694 | } |
e364646f | 695 | if (n < *fdl) |
696 | debug("XXX shrink: %d < %d", n, *fdl); | |
697 | *fdl = n; | |
42f11eb2 | 698 | memset(*fdrp, 0, sz); |
699 | memset(*fdwp, 0, sz); | |
700 | ||
701 | for (i = 0; i < sockets_alloc; i++) { | |
702 | switch (sockets[i].type) { | |
703 | case AUTH_SOCKET: | |
704 | case AUTH_CONNECTION: | |
705 | FD_SET(sockets[i].fd, *fdrp); | |
706 | if (buffer_len(&sockets[i].output) > 0) | |
707 | FD_SET(sockets[i].fd, *fdwp); | |
708 | break; | |
709 | default: | |
710 | break; | |
711 | } | |
712 | } | |
713 | return (1); | |
8efc0c15 | 714 | } |
715 | ||
396c147e | 716 | static void |
5260325f | 717 | after_select(fd_set *readset, fd_set *writeset) |
8efc0c15 | 718 | { |
1e3b8b07 | 719 | u_int i; |
5260325f | 720 | int len, sock; |
610cd5c6 | 721 | socklen_t slen; |
5260325f | 722 | char buf[1024]; |
723 | struct sockaddr_un sunaddr; | |
724 | ||
725 | for (i = 0; i < sockets_alloc; i++) | |
726 | switch (sockets[i].type) { | |
727 | case AUTH_UNUSED: | |
728 | break; | |
729 | case AUTH_SOCKET: | |
730 | if (FD_ISSET(sockets[i].fd, readset)) { | |
610cd5c6 | 731 | slen = sizeof(sunaddr); |
42f11eb2 | 732 | sock = accept(sockets[i].fd, |
733 | (struct sockaddr *) &sunaddr, &slen); | |
5260325f | 734 | if (sock < 0) { |
735 | perror("accept from AUTH_SOCKET"); | |
736 | break; | |
737 | } | |
738 | new_socket(AUTH_CONNECTION, sock); | |
739 | } | |
740 | break; | |
741 | case AUTH_CONNECTION: | |
742 | if (buffer_len(&sockets[i].output) > 0 && | |
743 | FD_ISSET(sockets[i].fd, writeset)) { | |
bbc62e59 | 744 | do { |
745 | len = write(sockets[i].fd, | |
746 | buffer_ptr(&sockets[i].output), | |
747 | buffer_len(&sockets[i].output)); | |
748 | if (len == -1 && (errno == EAGAIN || | |
749 | errno == EINTR)) | |
750 | continue; | |
751 | break; | |
752 | } while (1); | |
5260325f | 753 | if (len <= 0) { |
754 | shutdown(sockets[i].fd, SHUT_RDWR); | |
755 | close(sockets[i].fd); | |
756 | sockets[i].type = AUTH_UNUSED; | |
0ac7199f | 757 | buffer_free(&sockets[i].input); |
758 | buffer_free(&sockets[i].output); | |
5260325f | 759 | break; |
760 | } | |
761 | buffer_consume(&sockets[i].output, len); | |
762 | } | |
763 | if (FD_ISSET(sockets[i].fd, readset)) { | |
bbc62e59 | 764 | do { |
765 | len = read(sockets[i].fd, buf, sizeof(buf)); | |
766 | if (len == -1 && (errno == EAGAIN || | |
767 | errno == EINTR)) | |
768 | continue; | |
769 | break; | |
770 | } while (1); | |
5260325f | 771 | if (len <= 0) { |
772 | shutdown(sockets[i].fd, SHUT_RDWR); | |
773 | close(sockets[i].fd); | |
774 | sockets[i].type = AUTH_UNUSED; | |
0ac7199f | 775 | buffer_free(&sockets[i].input); |
776 | buffer_free(&sockets[i].output); | |
5260325f | 777 | break; |
778 | } | |
779 | buffer_append(&sockets[i].input, buf, len); | |
780 | process_message(&sockets[i]); | |
781 | } | |
782 | break; | |
783 | default: | |
784 | fatal("Unknown type %d", sockets[i].type); | |
785 | } | |
8efc0c15 | 786 | } |
787 | ||
396c147e | 788 | static void |
dae3fa13 | 789 | cleanup_socket(void) |
790 | { | |
2f4b2e38 | 791 | if (socket_name[0]) |
792 | unlink(socket_name); | |
793 | if (socket_dir[0]) | |
794 | rmdir(socket_dir); | |
8efc0c15 | 795 | } |
796 | ||
396c147e | 797 | static void |
dae3fa13 | 798 | cleanup_exit(int i) |
799 | { | |
5260325f | 800 | cleanup_socket(); |
801 | exit(i); | |
dae3fa13 | 802 | } |
803 | ||
396c147e | 804 | static void |
2f4b2e38 | 805 | cleanup_handler(int sig) |
806 | { | |
807 | cleanup_socket(); | |
808 | _exit(2); | |
809 | } | |
810 | ||
7efa8482 | 811 | static void |
812 | check_parent_exists(int sig) | |
813 | { | |
814 | int save_errno = errno; | |
815 | ||
816 | if (parent_pid != -1 && kill(parent_pid, 0) < 0) { | |
817 | /* printf("Parent has died - Authentication agent exiting.\n"); */ | |
818 | cleanup_handler(sig); /* safe */ | |
819 | } | |
820 | signal(SIGALRM, check_parent_exists); | |
821 | alarm(10); | |
822 | errno = save_errno; | |
823 | } | |
824 | ||
396c147e | 825 | static void |
cc8aca8a | 826 | usage(void) |
dae3fa13 | 827 | { |
33e766d2 | 828 | fprintf(stderr, "Usage: %s [options] [command [args ...]]\n", |
0e3c1f95 | 829 | __progname); |
33e766d2 | 830 | fprintf(stderr, "Options:\n"); |
831 | fprintf(stderr, " -c Generate C-shell commands on stdout.\n"); | |
832 | fprintf(stderr, " -s Generate Bourne shell commands on stdout.\n"); | |
833 | fprintf(stderr, " -k Kill the current agent.\n"); | |
834 | fprintf(stderr, " -d Debug mode.\n"); | |
5260325f | 835 | exit(1); |
dae3fa13 | 836 | } |
837 | ||
8efc0c15 | 838 | int |
839 | main(int ac, char **av) | |
840 | { | |
e364646f | 841 | int sock, c_flag = 0, d_flag = 0, k_flag = 0, s_flag = 0, ch, nalloc; |
5260325f | 842 | struct sockaddr_un sunaddr; |
b03bd394 | 843 | #ifdef HAVE_SETRLIMIT |
0b6fbf03 | 844 | struct rlimit rlim; |
c7ccfd39 | 845 | #endif |
846 | #ifdef HAVE_CYGWIN | |
847 | int prev_mask; | |
b03bd394 | 848 | #endif |
5260325f | 849 | pid_t pid; |
850 | char *shell, *format, *pidstr, pidstrbuf[1 + 3 * sizeof pid]; | |
c04f75f1 | 851 | extern int optind; |
42f11eb2 | 852 | fd_set *readsetp = NULL, *writesetp = NULL; |
fcb975eb | 853 | |
457fc0c6 | 854 | SSLeay_add_all_algorithms(); |
855 | ||
260d427b | 856 | __progname = get_progname(av[0]); |
264dce47 | 857 | init_rng(); |
e339aa53 | 858 | seed_rng(); |
2b87da3b | 859 | |
4e577b89 | 860 | #ifdef __GNU_LIBRARY__ |
ffdb5d70 | 861 | while ((ch = getopt(ac, av, "+cdks")) != -1) { |
4e577b89 | 862 | #else /* __GNU_LIBRARY__ */ |
ffdb5d70 | 863 | while ((ch = getopt(ac, av, "cdks")) != -1) { |
4e577b89 | 864 | #endif /* __GNU_LIBRARY__ */ |
5260325f | 865 | switch (ch) { |
866 | case 'c': | |
867 | if (s_flag) | |
868 | usage(); | |
869 | c_flag++; | |
870 | break; | |
871 | case 'k': | |
872 | k_flag++; | |
873 | break; | |
874 | case 's': | |
875 | if (c_flag) | |
876 | usage(); | |
877 | s_flag++; | |
878 | break; | |
ffdb5d70 | 879 | case 'd': |
880 | if (d_flag) | |
881 | usage(); | |
882 | d_flag++; | |
883 | break; | |
5260325f | 884 | default: |
885 | usage(); | |
886 | } | |
dae3fa13 | 887 | } |
5260325f | 888 | ac -= optind; |
889 | av += optind; | |
890 | ||
ffdb5d70 | 891 | if (ac > 0 && (c_flag || k_flag || s_flag || d_flag)) |
5260325f | 892 | usage(); |
893 | ||
ffdb5d70 | 894 | if (ac == 0 && !c_flag && !k_flag && !s_flag && !d_flag) { |
5260325f | 895 | shell = getenv("SHELL"); |
896 | if (shell != NULL && strncmp(shell + strlen(shell) - 3, "csh", 3) == 0) | |
897 | c_flag = 1; | |
dae3fa13 | 898 | } |
5260325f | 899 | if (k_flag) { |
900 | pidstr = getenv(SSH_AGENTPID_ENV_NAME); | |
901 | if (pidstr == NULL) { | |
902 | fprintf(stderr, "%s not set, cannot kill agent\n", | |
42f11eb2 | 903 | SSH_AGENTPID_ENV_NAME); |
5260325f | 904 | exit(1); |
905 | } | |
906 | pid = atoi(pidstr); | |
42f11eb2 | 907 | if (pid < 1) { |
5260325f | 908 | fprintf(stderr, "%s=\"%s\", which is not a good PID\n", |
42f11eb2 | 909 | SSH_AGENTPID_ENV_NAME, pidstr); |
5260325f | 910 | exit(1); |
911 | } | |
912 | if (kill(pid, SIGTERM) == -1) { | |
913 | perror("kill"); | |
914 | exit(1); | |
915 | } | |
916 | format = c_flag ? "unsetenv %s;\n" : "unset %s;\n"; | |
917 | printf(format, SSH_AUTHSOCKET_ENV_NAME); | |
918 | printf(format, SSH_AGENTPID_ENV_NAME); | |
919 | printf("echo Agent pid %d killed;\n", pid); | |
920 | exit(0); | |
dae3fa13 | 921 | } |
5260325f | 922 | parent_pid = getpid(); |
923 | ||
924 | /* Create private directory for agent socket */ | |
925 | strlcpy(socket_dir, "/tmp/ssh-XXXXXXXX", sizeof socket_dir); | |
926 | if (mkdtemp(socket_dir) == NULL) { | |
927 | perror("mkdtemp: private socket dir"); | |
928 | exit(1); | |
929 | } | |
930 | snprintf(socket_name, sizeof socket_name, "%s/agent.%d", socket_dir, | |
42f11eb2 | 931 | parent_pid); |
5260325f | 932 | |
aa3378df | 933 | /* |
934 | * Create socket early so it will exist before command gets run from | |
935 | * the parent. | |
936 | */ | |
5260325f | 937 | sock = socket(AF_UNIX, SOCK_STREAM, 0); |
938 | if (sock < 0) { | |
939 | perror("socket"); | |
940 | cleanup_exit(1); | |
941 | } | |
942 | memset(&sunaddr, 0, sizeof(sunaddr)); | |
943 | sunaddr.sun_family = AF_UNIX; | |
944 | strlcpy(sunaddr.sun_path, socket_name, sizeof(sunaddr.sun_path)); | |
c7ccfd39 | 945 | #ifdef HAVE_CYGWIN |
946 | prev_mask = umask(0177); | |
947 | #endif | |
5260325f | 948 | if (bind(sock, (struct sockaddr *) & sunaddr, sizeof(sunaddr)) < 0) { |
949 | perror("bind"); | |
c7ccfd39 | 950 | #ifdef HAVE_CYGWIN |
951 | umask(prev_mask); | |
952 | #endif | |
5260325f | 953 | cleanup_exit(1); |
954 | } | |
c7ccfd39 | 955 | #ifdef HAVE_CYGWIN |
956 | umask(prev_mask); | |
957 | #endif | |
5260325f | 958 | if (listen(sock, 5) < 0) { |
959 | perror("listen"); | |
960 | cleanup_exit(1); | |
dae3fa13 | 961 | } |
42f11eb2 | 962 | |
aa3378df | 963 | /* |
964 | * Fork, and have the parent execute the command, if any, or present | |
965 | * the socket data. The child continues as the authentication agent. | |
966 | */ | |
ffdb5d70 | 967 | if (d_flag) { |
968 | log_init(__progname, SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 1); | |
969 | format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n"; | |
970 | printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name, | |
971 | SSH_AUTHSOCKET_ENV_NAME); | |
972 | printf("echo Agent pid %d;\n", parent_pid); | |
973 | goto skip; | |
974 | } | |
5260325f | 975 | pid = fork(); |
976 | if (pid == -1) { | |
977 | perror("fork"); | |
978 | exit(1); | |
dae3fa13 | 979 | } |
5260325f | 980 | if (pid != 0) { /* Parent - execute the given command. */ |
981 | close(sock); | |
982 | snprintf(pidstrbuf, sizeof pidstrbuf, "%d", pid); | |
983 | if (ac == 0) { | |
984 | format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n"; | |
985 | printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name, | |
42f11eb2 | 986 | SSH_AUTHSOCKET_ENV_NAME); |
5260325f | 987 | printf(format, SSH_AGENTPID_ENV_NAME, pidstrbuf, |
42f11eb2 | 988 | SSH_AGENTPID_ENV_NAME); |
5260325f | 989 | printf("echo Agent pid %d;\n", pid); |
990 | exit(0); | |
991 | } | |
bcbf86ec | 992 | if (setenv(SSH_AUTHSOCKET_ENV_NAME, socket_name, 1) == -1 || |
993 | setenv(SSH_AGENTPID_ENV_NAME, pidstrbuf, 1) == -1) { | |
994 | perror("setenv"); | |
995 | exit(1); | |
996 | } | |
5260325f | 997 | execvp(av[0], av); |
998 | perror(av[0]); | |
999 | exit(1); | |
1000 | } | |
ec9f3450 | 1001 | |
1002 | if (setsid() == -1) { | |
1003 | perror("setsid"); | |
1004 | cleanup_exit(1); | |
1005 | } | |
1006 | ||
1007 | (void)chdir("/"); | |
5260325f | 1008 | close(0); |
1009 | close(1); | |
1010 | close(2); | |
dae3fa13 | 1011 | |
b03bd394 | 1012 | #ifdef HAVE_SETRLIMIT |
0b6fbf03 | 1013 | /* deny core dumps, since memory contains unencrypted private keys */ |
1014 | rlim.rlim_cur = rlim.rlim_max = 0; | |
1015 | if (setrlimit(RLIMIT_CORE, &rlim) < 0) { | |
1016 | perror("setrlimit rlimit_core failed"); | |
1017 | cleanup_exit(1); | |
1018 | } | |
b03bd394 | 1019 | #endif |
ffdb5d70 | 1020 | |
1021 | skip: | |
5260325f | 1022 | if (atexit(cleanup_socket) < 0) { |
1023 | perror("atexit"); | |
1024 | cleanup_exit(1); | |
1025 | } | |
1026 | new_socket(AUTH_SOCKET, sock); | |
1027 | if (ac > 0) { | |
1028 | signal(SIGALRM, check_parent_exists); | |
1029 | alarm(10); | |
1030 | } | |
2e73a022 | 1031 | idtab_init(); |
1ee482c5 | 1032 | if (!d_flag) |
ffdb5d70 | 1033 | signal(SIGINT, SIG_IGN); |
1ee482c5 | 1034 | signal(SIGPIPE, SIG_IGN); |
2f4b2e38 | 1035 | signal(SIGHUP, cleanup_handler); |
1036 | signal(SIGTERM, cleanup_handler); | |
e364646f | 1037 | nalloc = 0; |
1038 | ||
5260325f | 1039 | while (1) { |
e364646f | 1040 | prepare_select(&readsetp, &writesetp, &max_fd, &nalloc); |
42f11eb2 | 1041 | if (select(max_fd + 1, readsetp, writesetp, NULL, NULL) < 0) { |
5260325f | 1042 | if (errno == EINTR) |
1043 | continue; | |
1044 | exit(1); | |
1045 | } | |
42f11eb2 | 1046 | after_select(readsetp, writesetp); |
8efc0c15 | 1047 | } |
5260325f | 1048 | /* NOTREACHED */ |
8efc0c15 | 1049 | } |