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fccfbe3b | 1 | /* $OpenBSD: ssh-agent.c,v 1.81 2002/02/05 15:50:12 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" | |
fccfbe3b | 39 | RCSID("$OpenBSD: ssh-agent.c,v 1.81 2002/02/05 15:50:12 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" | |
8efc0c15 | 56 | #include "getput.h" |
4c8722d9 | 57 | #include "key.h" |
58 | #include "authfd.h" | |
188adeb2 | 59 | #include "compat.h" |
42f11eb2 | 60 | #include "log.h" |
8efc0c15 | 61 | |
2b5fe3b8 | 62 | #ifdef SMARTCARD |
63 | #include <openssl/engine.h> | |
64 | #include "scard.h" | |
dd2495cb | 65 | #endif |
2b5fe3b8 | 66 | |
17a3011c | 67 | typedef enum { |
68 | AUTH_UNUSED, | |
69 | AUTH_SOCKET, | |
70 | AUTH_CONNECTION | |
71 | } sock_type; | |
72 | ||
5260325f | 73 | typedef struct { |
74 | int fd; | |
17a3011c | 75 | sock_type type; |
5260325f | 76 | Buffer input; |
77 | Buffer output; | |
8efc0c15 | 78 | } SocketEntry; |
79 | ||
1e3b8b07 | 80 | u_int sockets_alloc = 0; |
8efc0c15 | 81 | SocketEntry *sockets = NULL; |
82 | ||
95f0a918 | 83 | typedef struct identity { |
84 | TAILQ_ENTRY(identity) next; | |
2e73a022 | 85 | Key *key; |
5260325f | 86 | char *comment; |
8efc0c15 | 87 | } Identity; |
88 | ||
2e73a022 | 89 | typedef struct { |
90 | int nentries; | |
95f0a918 | 91 | TAILQ_HEAD(idqueue, identity) idlist; |
2e73a022 | 92 | } Idtab; |
93 | ||
94 | /* private key table, one per protocol version */ | |
95 | Idtab idtable[3]; | |
8efc0c15 | 96 | |
97 | int max_fd = 0; | |
98 | ||
99 | /* pid of shell == parent of agent */ | |
9da5c3c9 | 100 | pid_t parent_pid = -1; |
8efc0c15 | 101 | |
102 | /* pathname and directory for AUTH_SOCKET */ | |
103 | char socket_name[1024]; | |
104 | char socket_dir[1024]; | |
105 | ||
5260325f | 106 | #ifdef HAVE___PROGNAME |
107 | extern char *__progname; | |
260d427b | 108 | #else |
109 | char *__progname; | |
110 | #endif | |
5260325f | 111 | |
396c147e | 112 | static void |
2e73a022 | 113 | idtab_init(void) |
114 | { | |
115 | int i; | |
6aacefa7 | 116 | for (i = 0; i <=2; i++) { |
95f0a918 | 117 | TAILQ_INIT(&idtable[i].idlist); |
2e73a022 | 118 | idtable[i].nentries = 0; |
119 | } | |
120 | } | |
121 | ||
122 | /* return private key table for requested protocol version */ | |
396c147e | 123 | static Idtab * |
2e73a022 | 124 | idtab_lookup(int version) |
125 | { | |
126 | if (version < 1 || version > 2) | |
127 | fatal("internal error, bad protocol version %d", version); | |
128 | return &idtable[version]; | |
129 | } | |
130 | ||
131 | /* return matching private key for given public key */ | |
95f0a918 | 132 | static Identity * |
133 | lookup_identity(Key *key, int version) | |
2e73a022 | 134 | { |
95f0a918 | 135 | Identity *id; |
136 | ||
2e73a022 | 137 | Idtab *tab = idtab_lookup(version); |
95f0a918 | 138 | TAILQ_FOREACH(id, &tab->idlist, next) { |
139 | if (key_equal(key, id->key)) | |
140 | return (id); | |
2e73a022 | 141 | } |
95f0a918 | 142 | return (NULL); |
143 | } | |
144 | ||
145 | static void | |
146 | free_identity(Identity *id) | |
147 | { | |
148 | key_free(id->key); | |
149 | xfree(id->comment); | |
150 | xfree(id); | |
2e73a022 | 151 | } |
152 | ||
153 | /* send list of supported public keys to 'client' */ | |
396c147e | 154 | static void |
2e73a022 | 155 | process_request_identities(SocketEntry *e, int version) |
8efc0c15 | 156 | { |
2e73a022 | 157 | Idtab *tab = idtab_lookup(version); |
5260325f | 158 | Buffer msg; |
95f0a918 | 159 | Identity *id; |
5260325f | 160 | |
161 | buffer_init(&msg); | |
2e73a022 | 162 | buffer_put_char(&msg, (version == 1) ? |
163 | SSH_AGENT_RSA_IDENTITIES_ANSWER : SSH2_AGENT_IDENTITIES_ANSWER); | |
164 | buffer_put_int(&msg, tab->nentries); | |
95f0a918 | 165 | TAILQ_FOREACH(id, &tab->idlist, next) { |
fa08c86b | 166 | if (id->key->type == KEY_RSA1) { |
2e73a022 | 167 | buffer_put_int(&msg, BN_num_bits(id->key->rsa->n)); |
168 | buffer_put_bignum(&msg, id->key->rsa->e); | |
169 | buffer_put_bignum(&msg, id->key->rsa->n); | |
170 | } else { | |
1e3b8b07 | 171 | u_char *blob; |
172 | u_int blen; | |
fa08c86b | 173 | key_to_blob(id->key, &blob, &blen); |
2e73a022 | 174 | buffer_put_string(&msg, blob, blen); |
175 | xfree(blob); | |
176 | } | |
177 | buffer_put_cstring(&msg, id->comment); | |
5260325f | 178 | } |
179 | buffer_put_int(&e->output, buffer_len(&msg)); | |
180 | buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg)); | |
181 | buffer_free(&msg); | |
8efc0c15 | 182 | } |
183 | ||
2e73a022 | 184 | /* ssh1 only */ |
396c147e | 185 | static void |
2e73a022 | 186 | process_authentication_challenge1(SocketEntry *e) |
8efc0c15 | 187 | { |
95f0a918 | 188 | Identity *id; |
189 | Key *key; | |
2e73a022 | 190 | BIGNUM *challenge; |
191 | int i, len; | |
5260325f | 192 | Buffer msg; |
193 | MD5_CTX md; | |
1e3b8b07 | 194 | u_char buf[32], mdbuf[16], session_id[16]; |
195 | u_int response_type; | |
5260325f | 196 | |
197 | buffer_init(&msg); | |
fa08c86b | 198 | key = key_new(KEY_RSA1); |
b775c6f2 | 199 | if ((challenge = BN_new()) == NULL) |
200 | fatal("process_authentication_challenge1: BN_new failed"); | |
5260325f | 201 | |
2e73a022 | 202 | buffer_get_int(&e->input); /* ignored */ |
203 | buffer_get_bignum(&e->input, key->rsa->e); | |
204 | buffer_get_bignum(&e->input, key->rsa->n); | |
205 | buffer_get_bignum(&e->input, challenge); | |
5260325f | 206 | |
2e73a022 | 207 | /* Only protocol 1.1 is supported */ |
208 | if (buffer_len(&e->input) == 0) | |
209 | goto failure; | |
e6207598 | 210 | buffer_get(&e->input, session_id, 16); |
2e73a022 | 211 | response_type = buffer_get_int(&e->input); |
212 | if (response_type != 1) | |
213 | goto failure; | |
214 | ||
95f0a918 | 215 | id = lookup_identity(key, 1); |
216 | if (id != NULL) { | |
217 | Key *private = id->key; | |
2e73a022 | 218 | /* Decrypt the challenge using the private key. */ |
46aa2d1f | 219 | if (rsa_private_decrypt(challenge, challenge, private->rsa) <= 0) |
220 | goto failure; | |
2e73a022 | 221 | |
222 | /* The response is MD5 of decrypted challenge plus session id. */ | |
223 | len = BN_num_bytes(challenge); | |
224 | if (len <= 0 || len > 32) { | |
225 | log("process_authentication_challenge: bad challenge length %d", len); | |
226 | goto failure; | |
5260325f | 227 | } |
2e73a022 | 228 | memset(buf, 0, 32); |
229 | BN_bn2bin(challenge, buf + 32 - len); | |
230 | MD5_Init(&md); | |
231 | MD5_Update(&md, buf, 32); | |
232 | MD5_Update(&md, session_id, 16); | |
233 | MD5_Final(mdbuf, &md); | |
234 | ||
235 | /* Send the response. */ | |
236 | buffer_put_char(&msg, SSH_AGENT_RSA_RESPONSE); | |
237 | for (i = 0; i < 16; i++) | |
238 | buffer_put_char(&msg, mdbuf[i]); | |
239 | goto send; | |
240 | } | |
241 | ||
242 | failure: | |
243 | /* Unknown identity or protocol error. Send failure. */ | |
5260325f | 244 | buffer_put_char(&msg, SSH_AGENT_FAILURE); |
245 | send: | |
2e73a022 | 246 | buffer_put_int(&e->output, buffer_len(&msg)); |
247 | buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg)); | |
248 | key_free(key); | |
249 | BN_clear_free(challenge); | |
250 | buffer_free(&msg); | |
251 | } | |
252 | ||
253 | /* ssh2 only */ | |
396c147e | 254 | static void |
2e73a022 | 255 | process_sign_request2(SocketEntry *e) |
256 | { | |
257 | extern int datafellows; | |
95f0a918 | 258 | Key *key; |
1e3b8b07 | 259 | u_char *blob, *data, *signature = NULL; |
260 | u_int blen, dlen, slen = 0; | |
188adeb2 | 261 | int flags; |
2e73a022 | 262 | Buffer msg; |
263 | int ok = -1; | |
264 | ||
265 | datafellows = 0; | |
227e8e86 | 266 | |
2e73a022 | 267 | blob = buffer_get_string(&e->input, &blen); |
268 | data = buffer_get_string(&e->input, &dlen); | |
188adeb2 | 269 | |
270 | flags = buffer_get_int(&e->input); | |
271 | if (flags & SSH_AGENT_OLD_SIGNATURE) | |
272 | datafellows = SSH_BUG_SIGBLOB; | |
2e73a022 | 273 | |
fa08c86b | 274 | key = key_from_blob(blob, blen); |
2e73a022 | 275 | if (key != NULL) { |
95f0a918 | 276 | Identity *id = lookup_identity(key, 2); |
277 | if (id != NULL) | |
278 | ok = key_sign(id->key, &signature, &slen, data, dlen); | |
2e73a022 | 279 | } |
280 | key_free(key); | |
281 | buffer_init(&msg); | |
282 | if (ok == 0) { | |
283 | buffer_put_char(&msg, SSH2_AGENT_SIGN_RESPONSE); | |
284 | buffer_put_string(&msg, signature, slen); | |
285 | } else { | |
286 | buffer_put_char(&msg, SSH_AGENT_FAILURE); | |
287 | } | |
5260325f | 288 | buffer_put_int(&e->output, buffer_len(&msg)); |
289 | buffer_append(&e->output, buffer_ptr(&msg), | |
2e73a022 | 290 | buffer_len(&msg)); |
5260325f | 291 | buffer_free(&msg); |
2e73a022 | 292 | xfree(data); |
293 | xfree(blob); | |
294 | if (signature != NULL) | |
295 | xfree(signature); | |
8efc0c15 | 296 | } |
297 | ||
2e73a022 | 298 | /* shared */ |
396c147e | 299 | static void |
2e73a022 | 300 | process_remove_identity(SocketEntry *e, int version) |
8efc0c15 | 301 | { |
95f0a918 | 302 | Key *key = NULL; |
1e3b8b07 | 303 | u_char *blob; |
304 | u_int blen; | |
305 | u_int bits; | |
2e73a022 | 306 | int success = 0; |
307 | ||
6aacefa7 | 308 | switch (version) { |
2e73a022 | 309 | case 1: |
fa08c86b | 310 | key = key_new(KEY_RSA1); |
2e73a022 | 311 | bits = buffer_get_int(&e->input); |
312 | buffer_get_bignum(&e->input, key->rsa->e); | |
313 | buffer_get_bignum(&e->input, key->rsa->n); | |
314 | ||
315 | if (bits != key_size(key)) | |
316 | log("Warning: identity keysize mismatch: actual %d, announced %d", | |
42f11eb2 | 317 | key_size(key), bits); |
2e73a022 | 318 | break; |
319 | case 2: | |
320 | blob = buffer_get_string(&e->input, &blen); | |
fa08c86b | 321 | key = key_from_blob(blob, blen); |
2e73a022 | 322 | xfree(blob); |
323 | break; | |
324 | } | |
325 | if (key != NULL) { | |
95f0a918 | 326 | Identity *id = lookup_identity(key, version); |
327 | if (id != NULL) { | |
aa3378df | 328 | /* |
329 | * We have this key. Free the old key. Since we | |
330 | * don\'t want to leave empty slots in the middle of | |
d343d900 | 331 | * the array, we actually free the key there and move |
332 | * all the entries between the empty slot and the end | |
333 | * of the array. | |
aa3378df | 334 | */ |
2e73a022 | 335 | Idtab *tab = idtab_lookup(version); |
fa08c86b | 336 | if (tab->nentries < 1) |
337 | fatal("process_remove_identity: " | |
338 | "internal error: tab->nentries %d", | |
339 | tab->nentries); | |
95f0a918 | 340 | TAILQ_REMOVE(&tab->idlist, id, next); |
341 | free_identity(id); | |
2e73a022 | 342 | tab->nentries--; |
343 | success = 1; | |
5260325f | 344 | } |
2e73a022 | 345 | key_free(key); |
346 | } | |
8efc0c15 | 347 | buffer_put_int(&e->output, 1); |
2e73a022 | 348 | buffer_put_char(&e->output, |
349 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
8efc0c15 | 350 | } |
351 | ||
396c147e | 352 | static void |
2e73a022 | 353 | process_remove_all_identities(SocketEntry *e, int version) |
8efc0c15 | 354 | { |
2e73a022 | 355 | Idtab *tab = idtab_lookup(version); |
95f0a918 | 356 | Identity *id; |
8efc0c15 | 357 | |
5260325f | 358 | /* Loop over all identities and clear the keys. */ |
95f0a918 | 359 | for (id = TAILQ_FIRST(&tab->idlist); id; |
360 | id = TAILQ_FIRST(&tab->idlist)) { | |
361 | TAILQ_REMOVE(&tab->idlist, id, next); | |
362 | free_identity(id); | |
5260325f | 363 | } |
8efc0c15 | 364 | |
5260325f | 365 | /* Mark that there are no identities. */ |
2e73a022 | 366 | tab->nentries = 0; |
8efc0c15 | 367 | |
368 | /* Send success. */ | |
369 | buffer_put_int(&e->output, 1); | |
370 | buffer_put_char(&e->output, SSH_AGENT_SUCCESS); | |
371 | return; | |
5260325f | 372 | } |
373 | ||
396c147e | 374 | static void |
fa08c86b | 375 | process_add_identity(SocketEntry *e, int version) |
376 | { | |
377 | Key *k = NULL; | |
378 | char *type_name; | |
2e73a022 | 379 | char *comment; |
fa08c86b | 380 | int type, success = 0; |
2e73a022 | 381 | Idtab *tab = idtab_lookup(version); |
5260325f | 382 | |
2e73a022 | 383 | switch (version) { |
384 | case 1: | |
fa08c86b | 385 | k = key_new_private(KEY_RSA1); |
42f11eb2 | 386 | buffer_get_int(&e->input); /* ignored */ |
fa08c86b | 387 | buffer_get_bignum(&e->input, k->rsa->n); |
388 | buffer_get_bignum(&e->input, k->rsa->e); | |
389 | buffer_get_bignum(&e->input, k->rsa->d); | |
390 | buffer_get_bignum(&e->input, k->rsa->iqmp); | |
2e73a022 | 391 | |
392 | /* SSH and SSL have p and q swapped */ | |
fa08c86b | 393 | buffer_get_bignum(&e->input, k->rsa->q); /* p */ |
394 | buffer_get_bignum(&e->input, k->rsa->p); /* q */ | |
2e73a022 | 395 | |
396 | /* Generate additional parameters */ | |
2b63e803 | 397 | rsa_generate_additional_parameters(k->rsa); |
2e73a022 | 398 | break; |
399 | case 2: | |
fa08c86b | 400 | type_name = buffer_get_string(&e->input, NULL); |
42f11eb2 | 401 | type = key_type_from_name(type_name); |
fa08c86b | 402 | xfree(type_name); |
6aacefa7 | 403 | switch (type) { |
fa08c86b | 404 | case KEY_DSA: |
405 | k = key_new_private(type); | |
406 | buffer_get_bignum2(&e->input, k->dsa->p); | |
407 | buffer_get_bignum2(&e->input, k->dsa->q); | |
408 | buffer_get_bignum2(&e->input, k->dsa->g); | |
409 | buffer_get_bignum2(&e->input, k->dsa->pub_key); | |
410 | buffer_get_bignum2(&e->input, k->dsa->priv_key); | |
411 | break; | |
412 | case KEY_RSA: | |
413 | k = key_new_private(type); | |
414 | buffer_get_bignum2(&e->input, k->rsa->n); | |
415 | buffer_get_bignum2(&e->input, k->rsa->e); | |
416 | buffer_get_bignum2(&e->input, k->rsa->d); | |
417 | buffer_get_bignum2(&e->input, k->rsa->iqmp); | |
418 | buffer_get_bignum2(&e->input, k->rsa->p); | |
419 | buffer_get_bignum2(&e->input, k->rsa->q); | |
420 | ||
421 | /* Generate additional parameters */ | |
2b63e803 | 422 | rsa_generate_additional_parameters(k->rsa); |
fa08c86b | 423 | break; |
424 | default: | |
2e73a022 | 425 | buffer_clear(&e->input); |
2e73a022 | 426 | goto send; |
5260325f | 427 | } |
2e73a022 | 428 | break; |
429 | } | |
2e73a022 | 430 | comment = buffer_get_string(&e->input, NULL); |
431 | if (k == NULL) { | |
432 | xfree(comment); | |
433 | goto send; | |
434 | } | |
435 | success = 1; | |
95f0a918 | 436 | if (lookup_identity(k, version) == NULL) { |
437 | Identity *id = xmalloc(sizeof(Identity)); | |
438 | id->key = k; | |
439 | id->comment = comment; | |
440 | TAILQ_INSERT_TAIL(&tab->idlist, id, next); | |
2e73a022 | 441 | /* Increment the number of identities. */ |
442 | tab->nentries++; | |
443 | } else { | |
444 | key_free(k); | |
445 | xfree(comment); | |
446 | } | |
447 | send: | |
5260325f | 448 | buffer_put_int(&e->output, 1); |
2e73a022 | 449 | buffer_put_char(&e->output, |
450 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
8efc0c15 | 451 | } |
452 | ||
2b5fe3b8 | 453 | |
454 | #ifdef SMARTCARD | |
455 | static void | |
456 | process_add_smartcard_key (SocketEntry *e) | |
457 | { | |
458 | Idtab *tab; | |
459 | Key *n = NULL, *k = NULL; | |
9ff6f66f | 460 | char *sc_reader_id = NULL; |
2b5fe3b8 | 461 | int success = 0; |
184eed6a | 462 | |
9ff6f66f | 463 | sc_reader_id = buffer_get_string(&e->input, NULL); |
464 | k = sc_get_key(sc_reader_id); | |
465 | xfree(sc_reader_id); | |
2b5fe3b8 | 466 | |
2b5fe3b8 | 467 | if (k == NULL) { |
468 | error("sc_get_pubkey failed"); | |
469 | goto send; | |
470 | } | |
471 | success = 1; | |
472 | ||
473 | tab = idtab_lookup(1); | |
a0e0f486 | 474 | k->type = KEY_RSA1; |
95f0a918 | 475 | if (lookup_identity(k, 1) == NULL) { |
476 | Identity *id = xmalloc(sizeof(Identity)); | |
2b5fe3b8 | 477 | n = key_new(KEY_RSA1); |
478 | BN_copy(n->rsa->n, k->rsa->n); | |
479 | BN_copy(n->rsa->e, k->rsa->e); | |
480 | RSA_set_method(n->rsa, sc_get_engine()); | |
95f0a918 | 481 | id->key = n; |
482 | id->comment = xstrdup("rsa1 smartcard"); | |
483 | TAILQ_INSERT_TAIL(&tab->idlist, id, next); | |
2b5fe3b8 | 484 | tab->nentries++; |
485 | } | |
a0e0f486 | 486 | k->type = KEY_RSA; |
2b5fe3b8 | 487 | tab = idtab_lookup(2); |
95f0a918 | 488 | if (lookup_identity(k, 2) == NULL) { |
489 | Identity *id = xmalloc(sizeof(Identity)); | |
2b5fe3b8 | 490 | n = key_new(KEY_RSA); |
491 | BN_copy(n->rsa->n, k->rsa->n); | |
492 | BN_copy(n->rsa->e, k->rsa->e); | |
493 | RSA_set_method(n->rsa, sc_get_engine()); | |
95f0a918 | 494 | id->key = n; |
495 | id->comment = xstrdup("rsa smartcard"); | |
496 | TAILQ_INSERT_TAIL(&tab->idlist, id, next); | |
2b5fe3b8 | 497 | tab->nentries++; |
498 | } | |
499 | key_free(k); | |
500 | send: | |
501 | buffer_put_int(&e->output, 1); | |
502 | buffer_put_char(&e->output, | |
503 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
504 | } | |
505 | ||
506 | static void | |
507 | process_remove_smartcard_key(SocketEntry *e) | |
508 | { | |
95f0a918 | 509 | Key *k = NULL; |
2b5fe3b8 | 510 | int success = 0; |
9ff6f66f | 511 | char *sc_reader_id = NULL; |
2b5fe3b8 | 512 | |
9ff6f66f | 513 | sc_reader_id = buffer_get_string(&e->input, NULL); |
514 | k = sc_get_key(sc_reader_id); | |
515 | xfree(sc_reader_id); | |
2b5fe3b8 | 516 | |
9ff6f66f | 517 | if (k == NULL) { |
2b5fe3b8 | 518 | error("sc_get_pubkey failed"); |
519 | } else { | |
95f0a918 | 520 | Identity *id; |
77261db4 | 521 | k->type = KEY_RSA1; |
95f0a918 | 522 | id = lookup_identity(k, 1); |
523 | if (id != NULL) { | |
2b5fe3b8 | 524 | Idtab *tab = idtab_lookup(1); |
95f0a918 | 525 | TAILQ_REMOVE(&tab->idlist, id, next); |
526 | free_identity(id); | |
2b5fe3b8 | 527 | tab->nentries--; |
528 | success = 1; | |
529 | } | |
77261db4 | 530 | k->type = KEY_RSA; |
95f0a918 | 531 | id = lookup_identity(k, 2); |
532 | if (id != NULL) { | |
2b5fe3b8 | 533 | Idtab *tab = idtab_lookup(2); |
95f0a918 | 534 | TAILQ_REMOVE(&tab->idlist, id, next); |
535 | free_identity(id); | |
2b5fe3b8 | 536 | tab->nentries--; |
537 | success = 1; | |
538 | } | |
539 | key_free(k); | |
540 | } | |
541 | ||
542 | buffer_put_int(&e->output, 1); | |
543 | buffer_put_char(&e->output, | |
544 | success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); | |
545 | } | |
3e984472 | 546 | #endif /* SMARTCARD */ |
2b5fe3b8 | 547 | |
2e73a022 | 548 | /* dispatch incoming messages */ |
549 | ||
396c147e | 550 | static void |
8efc0c15 | 551 | process_message(SocketEntry *e) |
552 | { | |
1e3b8b07 | 553 | u_int msg_len; |
554 | u_int type; | |
555 | u_char *cp; | |
5260325f | 556 | if (buffer_len(&e->input) < 5) |
557 | return; /* Incomplete message. */ | |
20905a8e | 558 | cp = buffer_ptr(&e->input); |
5260325f | 559 | msg_len = GET_32BIT(cp); |
560 | if (msg_len > 256 * 1024) { | |
561 | shutdown(e->fd, SHUT_RDWR); | |
562 | close(e->fd); | |
563 | e->type = AUTH_UNUSED; | |
564 | return; | |
565 | } | |
566 | if (buffer_len(&e->input) < msg_len + 4) | |
567 | return; | |
568 | buffer_consume(&e->input, 4); | |
569 | type = buffer_get_char(&e->input); | |
570 | ||
2b5fe3b8 | 571 | debug("type %d", type); |
5260325f | 572 | switch (type) { |
2e73a022 | 573 | /* ssh1 */ |
5260325f | 574 | case SSH_AGENTC_RSA_CHALLENGE: |
2e73a022 | 575 | process_authentication_challenge1(e); |
576 | break; | |
577 | case SSH_AGENTC_REQUEST_RSA_IDENTITIES: | |
578 | process_request_identities(e, 1); | |
5260325f | 579 | break; |
580 | case SSH_AGENTC_ADD_RSA_IDENTITY: | |
2e73a022 | 581 | process_add_identity(e, 1); |
5260325f | 582 | break; |
583 | case SSH_AGENTC_REMOVE_RSA_IDENTITY: | |
2e73a022 | 584 | process_remove_identity(e, 1); |
5260325f | 585 | break; |
586 | case SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES: | |
2e73a022 | 587 | process_remove_all_identities(e, 1); |
588 | break; | |
589 | /* ssh2 */ | |
590 | case SSH2_AGENTC_SIGN_REQUEST: | |
591 | process_sign_request2(e); | |
592 | break; | |
593 | case SSH2_AGENTC_REQUEST_IDENTITIES: | |
594 | process_request_identities(e, 2); | |
595 | break; | |
596 | case SSH2_AGENTC_ADD_IDENTITY: | |
597 | process_add_identity(e, 2); | |
598 | break; | |
599 | case SSH2_AGENTC_REMOVE_IDENTITY: | |
600 | process_remove_identity(e, 2); | |
601 | break; | |
602 | case SSH2_AGENTC_REMOVE_ALL_IDENTITIES: | |
603 | process_remove_all_identities(e, 2); | |
5260325f | 604 | break; |
2b5fe3b8 | 605 | #ifdef SMARTCARD |
606 | case SSH_AGENTC_ADD_SMARTCARD_KEY: | |
607 | process_add_smartcard_key(e); | |
184eed6a | 608 | break; |
2b5fe3b8 | 609 | case SSH_AGENTC_REMOVE_SMARTCARD_KEY: |
610 | process_remove_smartcard_key(e); | |
184eed6a | 611 | break; |
3e984472 | 612 | #endif /* SMARTCARD */ |
5260325f | 613 | default: |
614 | /* Unknown message. Respond with failure. */ | |
615 | error("Unknown message %d", type); | |
616 | buffer_clear(&e->input); | |
617 | buffer_put_int(&e->output, 1); | |
618 | buffer_put_char(&e->output, SSH_AGENT_FAILURE); | |
619 | break; | |
620 | } | |
8efc0c15 | 621 | } |
622 | ||
396c147e | 623 | static void |
17a3011c | 624 | new_socket(sock_type type, int fd) |
8efc0c15 | 625 | { |
1e3b8b07 | 626 | u_int i, old_alloc; |
5260325f | 627 | if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) |
628 | error("fcntl O_NONBLOCK: %s", strerror(errno)); | |
629 | ||
630 | if (fd > max_fd) | |
631 | max_fd = fd; | |
632 | ||
633 | for (i = 0; i < sockets_alloc; i++) | |
634 | if (sockets[i].type == AUTH_UNUSED) { | |
635 | sockets[i].fd = fd; | |
636 | sockets[i].type = type; | |
637 | buffer_init(&sockets[i].input); | |
638 | buffer_init(&sockets[i].output); | |
639 | return; | |
640 | } | |
641 | old_alloc = sockets_alloc; | |
642 | sockets_alloc += 10; | |
643 | if (sockets) | |
644 | sockets = xrealloc(sockets, sockets_alloc * sizeof(sockets[0])); | |
645 | else | |
646 | sockets = xmalloc(sockets_alloc * sizeof(sockets[0])); | |
647 | for (i = old_alloc; i < sockets_alloc; i++) | |
648 | sockets[i].type = AUTH_UNUSED; | |
649 | sockets[old_alloc].type = type; | |
650 | sockets[old_alloc].fd = fd; | |
651 | buffer_init(&sockets[old_alloc].input); | |
652 | buffer_init(&sockets[old_alloc].output); | |
8efc0c15 | 653 | } |
654 | ||
396c147e | 655 | static int |
e364646f | 656 | prepare_select(fd_set **fdrp, fd_set **fdwp, int *fdl, int *nallocp) |
8efc0c15 | 657 | { |
42f11eb2 | 658 | u_int i, sz; |
659 | int n = 0; | |
660 | ||
661 | for (i = 0; i < sockets_alloc; i++) { | |
5260325f | 662 | switch (sockets[i].type) { |
663 | case AUTH_SOCKET: | |
664 | case AUTH_CONNECTION: | |
42f11eb2 | 665 | n = MAX(n, sockets[i].fd); |
5260325f | 666 | break; |
667 | case AUTH_UNUSED: | |
668 | break; | |
669 | default: | |
670 | fatal("Unknown socket type %d", sockets[i].type); | |
671 | break; | |
672 | } | |
42f11eb2 | 673 | } |
674 | ||
675 | sz = howmany(n+1, NFDBITS) * sizeof(fd_mask); | |
e364646f | 676 | if (*fdrp == NULL || sz > *nallocp) { |
42f11eb2 | 677 | if (*fdrp) |
894c5fa6 | 678 | xfree(*fdrp); |
42f11eb2 | 679 | if (*fdwp) |
894c5fa6 | 680 | xfree(*fdwp); |
42f11eb2 | 681 | *fdrp = xmalloc(sz); |
682 | *fdwp = xmalloc(sz); | |
e364646f | 683 | *nallocp = sz; |
42f11eb2 | 684 | } |
e364646f | 685 | if (n < *fdl) |
686 | debug("XXX shrink: %d < %d", n, *fdl); | |
687 | *fdl = n; | |
42f11eb2 | 688 | memset(*fdrp, 0, sz); |
689 | memset(*fdwp, 0, sz); | |
690 | ||
691 | for (i = 0; i < sockets_alloc; i++) { | |
692 | switch (sockets[i].type) { | |
693 | case AUTH_SOCKET: | |
694 | case AUTH_CONNECTION: | |
695 | FD_SET(sockets[i].fd, *fdrp); | |
696 | if (buffer_len(&sockets[i].output) > 0) | |
697 | FD_SET(sockets[i].fd, *fdwp); | |
698 | break; | |
699 | default: | |
700 | break; | |
701 | } | |
702 | } | |
703 | return (1); | |
8efc0c15 | 704 | } |
705 | ||
396c147e | 706 | static void |
5260325f | 707 | after_select(fd_set *readset, fd_set *writeset) |
8efc0c15 | 708 | { |
1e3b8b07 | 709 | u_int i; |
5260325f | 710 | int len, sock; |
610cd5c6 | 711 | socklen_t slen; |
5260325f | 712 | char buf[1024]; |
713 | struct sockaddr_un sunaddr; | |
714 | ||
715 | for (i = 0; i < sockets_alloc; i++) | |
716 | switch (sockets[i].type) { | |
717 | case AUTH_UNUSED: | |
718 | break; | |
719 | case AUTH_SOCKET: | |
720 | if (FD_ISSET(sockets[i].fd, readset)) { | |
610cd5c6 | 721 | slen = sizeof(sunaddr); |
42f11eb2 | 722 | sock = accept(sockets[i].fd, |
723 | (struct sockaddr *) &sunaddr, &slen); | |
5260325f | 724 | if (sock < 0) { |
fccfbe3b | 725 | error("accept from AUTH_SOCKET: %s", |
726 | strerror(errno)); | |
5260325f | 727 | break; |
728 | } | |
729 | new_socket(AUTH_CONNECTION, sock); | |
730 | } | |
731 | break; | |
732 | case AUTH_CONNECTION: | |
733 | if (buffer_len(&sockets[i].output) > 0 && | |
734 | FD_ISSET(sockets[i].fd, writeset)) { | |
bbc62e59 | 735 | do { |
736 | len = write(sockets[i].fd, | |
737 | buffer_ptr(&sockets[i].output), | |
738 | buffer_len(&sockets[i].output)); | |
739 | if (len == -1 && (errno == EAGAIN || | |
740 | errno == EINTR)) | |
741 | continue; | |
742 | break; | |
743 | } while (1); | |
5260325f | 744 | if (len <= 0) { |
745 | shutdown(sockets[i].fd, SHUT_RDWR); | |
746 | close(sockets[i].fd); | |
747 | sockets[i].type = AUTH_UNUSED; | |
0ac7199f | 748 | buffer_free(&sockets[i].input); |
749 | buffer_free(&sockets[i].output); | |
5260325f | 750 | break; |
751 | } | |
752 | buffer_consume(&sockets[i].output, len); | |
753 | } | |
754 | if (FD_ISSET(sockets[i].fd, readset)) { | |
bbc62e59 | 755 | do { |
756 | len = read(sockets[i].fd, buf, sizeof(buf)); | |
757 | if (len == -1 && (errno == EAGAIN || | |
758 | errno == EINTR)) | |
759 | continue; | |
760 | break; | |
761 | } while (1); | |
5260325f | 762 | if (len <= 0) { |
763 | shutdown(sockets[i].fd, SHUT_RDWR); | |
764 | close(sockets[i].fd); | |
765 | sockets[i].type = AUTH_UNUSED; | |
0ac7199f | 766 | buffer_free(&sockets[i].input); |
767 | buffer_free(&sockets[i].output); | |
5260325f | 768 | break; |
769 | } | |
770 | buffer_append(&sockets[i].input, buf, len); | |
771 | process_message(&sockets[i]); | |
772 | } | |
773 | break; | |
774 | default: | |
775 | fatal("Unknown type %d", sockets[i].type); | |
776 | } | |
8efc0c15 | 777 | } |
778 | ||
396c147e | 779 | static void |
fccfbe3b | 780 | cleanup_socket(void *p) |
dae3fa13 | 781 | { |
2f4b2e38 | 782 | if (socket_name[0]) |
783 | unlink(socket_name); | |
784 | if (socket_dir[0]) | |
785 | rmdir(socket_dir); | |
8efc0c15 | 786 | } |
787 | ||
396c147e | 788 | static void |
dae3fa13 | 789 | cleanup_exit(int i) |
790 | { | |
fccfbe3b | 791 | cleanup_socket(NULL); |
5260325f | 792 | exit(i); |
dae3fa13 | 793 | } |
794 | ||
396c147e | 795 | static void |
2f4b2e38 | 796 | cleanup_handler(int sig) |
797 | { | |
fccfbe3b | 798 | cleanup_socket(NULL); |
2f4b2e38 | 799 | _exit(2); |
800 | } | |
801 | ||
7efa8482 | 802 | static void |
803 | check_parent_exists(int sig) | |
804 | { | |
805 | int save_errno = errno; | |
806 | ||
807 | if (parent_pid != -1 && kill(parent_pid, 0) < 0) { | |
808 | /* printf("Parent has died - Authentication agent exiting.\n"); */ | |
809 | cleanup_handler(sig); /* safe */ | |
810 | } | |
811 | signal(SIGALRM, check_parent_exists); | |
812 | alarm(10); | |
813 | errno = save_errno; | |
814 | } | |
815 | ||
396c147e | 816 | static void |
cc8aca8a | 817 | usage(void) |
dae3fa13 | 818 | { |
33e766d2 | 819 | fprintf(stderr, "Usage: %s [options] [command [args ...]]\n", |
0e3c1f95 | 820 | __progname); |
33e766d2 | 821 | fprintf(stderr, "Options:\n"); |
822 | fprintf(stderr, " -c Generate C-shell commands on stdout.\n"); | |
823 | fprintf(stderr, " -s Generate Bourne shell commands on stdout.\n"); | |
824 | fprintf(stderr, " -k Kill the current agent.\n"); | |
825 | fprintf(stderr, " -d Debug mode.\n"); | |
5260325f | 826 | exit(1); |
dae3fa13 | 827 | } |
828 | ||
8efc0c15 | 829 | int |
830 | main(int ac, char **av) | |
831 | { | |
e364646f | 832 | int sock, c_flag = 0, d_flag = 0, k_flag = 0, s_flag = 0, ch, nalloc; |
5260325f | 833 | struct sockaddr_un sunaddr; |
b03bd394 | 834 | #ifdef HAVE_SETRLIMIT |
0b6fbf03 | 835 | struct rlimit rlim; |
c7ccfd39 | 836 | #endif |
837 | #ifdef HAVE_CYGWIN | |
838 | int prev_mask; | |
b03bd394 | 839 | #endif |
5260325f | 840 | pid_t pid; |
841 | char *shell, *format, *pidstr, pidstrbuf[1 + 3 * sizeof pid]; | |
c04f75f1 | 842 | extern int optind; |
42f11eb2 | 843 | fd_set *readsetp = NULL, *writesetp = NULL; |
fcb975eb | 844 | |
457fc0c6 | 845 | SSLeay_add_all_algorithms(); |
846 | ||
260d427b | 847 | __progname = get_progname(av[0]); |
264dce47 | 848 | init_rng(); |
e339aa53 | 849 | seed_rng(); |
2b87da3b | 850 | |
4e577b89 | 851 | #ifdef __GNU_LIBRARY__ |
ffdb5d70 | 852 | while ((ch = getopt(ac, av, "+cdks")) != -1) { |
4e577b89 | 853 | #else /* __GNU_LIBRARY__ */ |
ffdb5d70 | 854 | while ((ch = getopt(ac, av, "cdks")) != -1) { |
4e577b89 | 855 | #endif /* __GNU_LIBRARY__ */ |
5260325f | 856 | switch (ch) { |
857 | case 'c': | |
858 | if (s_flag) | |
859 | usage(); | |
860 | c_flag++; | |
861 | break; | |
862 | case 'k': | |
863 | k_flag++; | |
864 | break; | |
865 | case 's': | |
866 | if (c_flag) | |
867 | usage(); | |
868 | s_flag++; | |
869 | break; | |
ffdb5d70 | 870 | case 'd': |
871 | if (d_flag) | |
872 | usage(); | |
873 | d_flag++; | |
874 | break; | |
5260325f | 875 | default: |
876 | usage(); | |
877 | } | |
dae3fa13 | 878 | } |
5260325f | 879 | ac -= optind; |
880 | av += optind; | |
881 | ||
ffdb5d70 | 882 | if (ac > 0 && (c_flag || k_flag || s_flag || d_flag)) |
5260325f | 883 | usage(); |
884 | ||
ffdb5d70 | 885 | if (ac == 0 && !c_flag && !k_flag && !s_flag && !d_flag) { |
5260325f | 886 | shell = getenv("SHELL"); |
887 | if (shell != NULL && strncmp(shell + strlen(shell) - 3, "csh", 3) == 0) | |
888 | c_flag = 1; | |
dae3fa13 | 889 | } |
5260325f | 890 | if (k_flag) { |
891 | pidstr = getenv(SSH_AGENTPID_ENV_NAME); | |
892 | if (pidstr == NULL) { | |
893 | fprintf(stderr, "%s not set, cannot kill agent\n", | |
42f11eb2 | 894 | SSH_AGENTPID_ENV_NAME); |
5260325f | 895 | exit(1); |
896 | } | |
897 | pid = atoi(pidstr); | |
42f11eb2 | 898 | if (pid < 1) { |
5260325f | 899 | fprintf(stderr, "%s=\"%s\", which is not a good PID\n", |
42f11eb2 | 900 | SSH_AGENTPID_ENV_NAME, pidstr); |
5260325f | 901 | exit(1); |
902 | } | |
903 | if (kill(pid, SIGTERM) == -1) { | |
904 | perror("kill"); | |
905 | exit(1); | |
906 | } | |
907 | format = c_flag ? "unsetenv %s;\n" : "unset %s;\n"; | |
908 | printf(format, SSH_AUTHSOCKET_ENV_NAME); | |
909 | printf(format, SSH_AGENTPID_ENV_NAME); | |
910 | printf("echo Agent pid %d killed;\n", pid); | |
911 | exit(0); | |
dae3fa13 | 912 | } |
5260325f | 913 | parent_pid = getpid(); |
914 | ||
915 | /* Create private directory for agent socket */ | |
916 | strlcpy(socket_dir, "/tmp/ssh-XXXXXXXX", sizeof socket_dir); | |
917 | if (mkdtemp(socket_dir) == NULL) { | |
918 | perror("mkdtemp: private socket dir"); | |
919 | exit(1); | |
920 | } | |
921 | snprintf(socket_name, sizeof socket_name, "%s/agent.%d", socket_dir, | |
42f11eb2 | 922 | parent_pid); |
5260325f | 923 | |
aa3378df | 924 | /* |
925 | * Create socket early so it will exist before command gets run from | |
926 | * the parent. | |
927 | */ | |
5260325f | 928 | sock = socket(AF_UNIX, SOCK_STREAM, 0); |
929 | if (sock < 0) { | |
930 | perror("socket"); | |
931 | cleanup_exit(1); | |
932 | } | |
933 | memset(&sunaddr, 0, sizeof(sunaddr)); | |
934 | sunaddr.sun_family = AF_UNIX; | |
935 | strlcpy(sunaddr.sun_path, socket_name, sizeof(sunaddr.sun_path)); | |
c7ccfd39 | 936 | #ifdef HAVE_CYGWIN |
937 | prev_mask = umask(0177); | |
938 | #endif | |
5260325f | 939 | if (bind(sock, (struct sockaddr *) & sunaddr, sizeof(sunaddr)) < 0) { |
940 | perror("bind"); | |
c7ccfd39 | 941 | #ifdef HAVE_CYGWIN |
942 | umask(prev_mask); | |
943 | #endif | |
5260325f | 944 | cleanup_exit(1); |
945 | } | |
c7ccfd39 | 946 | #ifdef HAVE_CYGWIN |
947 | umask(prev_mask); | |
948 | #endif | |
5260325f | 949 | if (listen(sock, 5) < 0) { |
950 | perror("listen"); | |
951 | cleanup_exit(1); | |
dae3fa13 | 952 | } |
42f11eb2 | 953 | |
aa3378df | 954 | /* |
955 | * Fork, and have the parent execute the command, if any, or present | |
956 | * the socket data. The child continues as the authentication agent. | |
957 | */ | |
ffdb5d70 | 958 | if (d_flag) { |
959 | log_init(__progname, SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 1); | |
960 | format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n"; | |
961 | printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name, | |
962 | SSH_AUTHSOCKET_ENV_NAME); | |
963 | printf("echo Agent pid %d;\n", parent_pid); | |
964 | goto skip; | |
965 | } | |
5260325f | 966 | pid = fork(); |
967 | if (pid == -1) { | |
968 | perror("fork"); | |
fccfbe3b | 969 | cleanup_exit(1); |
dae3fa13 | 970 | } |
5260325f | 971 | if (pid != 0) { /* Parent - execute the given command. */ |
972 | close(sock); | |
973 | snprintf(pidstrbuf, sizeof pidstrbuf, "%d", pid); | |
974 | if (ac == 0) { | |
975 | format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n"; | |
976 | printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name, | |
42f11eb2 | 977 | SSH_AUTHSOCKET_ENV_NAME); |
5260325f | 978 | printf(format, SSH_AGENTPID_ENV_NAME, pidstrbuf, |
42f11eb2 | 979 | SSH_AGENTPID_ENV_NAME); |
5260325f | 980 | printf("echo Agent pid %d;\n", pid); |
981 | exit(0); | |
982 | } | |
bcbf86ec | 983 | if (setenv(SSH_AUTHSOCKET_ENV_NAME, socket_name, 1) == -1 || |
984 | setenv(SSH_AGENTPID_ENV_NAME, pidstrbuf, 1) == -1) { | |
985 | perror("setenv"); | |
986 | exit(1); | |
987 | } | |
5260325f | 988 | execvp(av[0], av); |
989 | perror(av[0]); | |
990 | exit(1); | |
991 | } | |
fccfbe3b | 992 | /* child */ |
993 | log_init(__progname, SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_AUTH, 0); | |
ec9f3450 | 994 | |
995 | if (setsid() == -1) { | |
fccfbe3b | 996 | error("setsid: %s", strerror(errno)); |
ec9f3450 | 997 | cleanup_exit(1); |
998 | } | |
999 | ||
1000 | (void)chdir("/"); | |
5260325f | 1001 | close(0); |
1002 | close(1); | |
1003 | close(2); | |
dae3fa13 | 1004 | |
b03bd394 | 1005 | #ifdef HAVE_SETRLIMIT |
0b6fbf03 | 1006 | /* deny core dumps, since memory contains unencrypted private keys */ |
1007 | rlim.rlim_cur = rlim.rlim_max = 0; | |
1008 | if (setrlimit(RLIMIT_CORE, &rlim) < 0) { | |
fccfbe3b | 1009 | error("setrlimit RLIMIT_CORE: %s", strerror(errno)); |
0b6fbf03 | 1010 | cleanup_exit(1); |
1011 | } | |
b03bd394 | 1012 | #endif |
ffdb5d70 | 1013 | |
1014 | skip: | |
fccfbe3b | 1015 | fatal_add_cleanup(cleanup_socket, NULL); |
5260325f | 1016 | new_socket(AUTH_SOCKET, sock); |
1017 | if (ac > 0) { | |
1018 | signal(SIGALRM, check_parent_exists); | |
1019 | alarm(10); | |
1020 | } | |
2e73a022 | 1021 | idtab_init(); |
1ee482c5 | 1022 | if (!d_flag) |
ffdb5d70 | 1023 | signal(SIGINT, SIG_IGN); |
1ee482c5 | 1024 | signal(SIGPIPE, SIG_IGN); |
2f4b2e38 | 1025 | signal(SIGHUP, cleanup_handler); |
1026 | signal(SIGTERM, cleanup_handler); | |
e364646f | 1027 | nalloc = 0; |
1028 | ||
5260325f | 1029 | while (1) { |
e364646f | 1030 | prepare_select(&readsetp, &writesetp, &max_fd, &nalloc); |
42f11eb2 | 1031 | if (select(max_fd + 1, readsetp, writesetp, NULL, NULL) < 0) { |
5260325f | 1032 | if (errno == EINTR) |
1033 | continue; | |
fccfbe3b | 1034 | fatal("select: %s", strerror(errno)); |
5260325f | 1035 | } |
42f11eb2 | 1036 | after_select(readsetp, writesetp); |
8efc0c15 | 1037 | } |
5260325f | 1038 | /* NOTREACHED */ |
8efc0c15 | 1039 | } |