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Commit | Line | Data |
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8efc0c15 | 1 | /* |
6ae2364d | 2 | * |
5260325f | 3 | * authfd.c |
6ae2364d | 4 | * |
5260325f | 5 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
6ae2364d | 6 | * |
5260325f | 7 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
8 | * All rights reserved | |
6ae2364d | 9 | * |
5260325f | 10 | * Created: Wed Mar 29 01:30:28 1995 ylo |
6ae2364d | 11 | * |
5260325f | 12 | * Functions for connecting the local authentication agent. |
6ae2364d | 13 | * |
5260325f | 14 | */ |
8efc0c15 | 15 | |
16 | #include "includes.h" | |
17 | RCSID("$Id$"); | |
18 | ||
19 | #include "ssh.h" | |
20 | #include "rsa.h" | |
21 | #include "authfd.h" | |
22 | #include "buffer.h" | |
23 | #include "bufaux.h" | |
24 | #include "xmalloc.h" | |
25 | #include "getput.h" | |
26 | ||
27 | #include <openssl/rsa.h> | |
28 | ||
29 | /* Returns the number of the authentication fd, or -1 if there is none. */ | |
30 | ||
31 | int | |
32 | ssh_get_authentication_socket() | |
33 | { | |
5260325f | 34 | const char *authsocket; |
35 | int sock; | |
36 | struct sockaddr_un sunaddr; | |
37 | ||
38 | authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME); | |
39 | if (!authsocket) | |
40 | return -1; | |
41 | ||
42 | sunaddr.sun_family = AF_UNIX; | |
43 | strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path)); | |
44 | ||
45 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
46 | if (sock < 0) | |
47 | return -1; | |
48 | ||
49 | /* close on exec */ | |
50 | if (fcntl(sock, F_SETFD, 1) == -1) { | |
51 | close(sock); | |
52 | return -1; | |
53 | } | |
54 | if (connect(sock, (struct sockaddr *) & sunaddr, sizeof(sunaddr)) < 0) { | |
55 | close(sock); | |
56 | return -1; | |
57 | } | |
58 | return sock; | |
8efc0c15 | 59 | } |
60 | ||
aa3378df | 61 | /* |
62 | * Closes the agent socket if it should be closed (depends on how it was | |
63 | * obtained). The argument must have been returned by | |
64 | * ssh_get_authentication_socket(). | |
65 | */ | |
8efc0c15 | 66 | |
6ae2364d | 67 | void |
5260325f | 68 | ssh_close_authentication_socket(int sock) |
8efc0c15 | 69 | { |
5260325f | 70 | if (getenv(SSH_AUTHSOCKET_ENV_NAME)) |
71 | close(sock); | |
8efc0c15 | 72 | } |
73 | ||
aa3378df | 74 | /* |
75 | * Opens and connects a private socket for communication with the | |
76 | * authentication agent. Returns the file descriptor (which must be | |
77 | * shut down and closed by the caller when no longer needed). | |
78 | * Returns NULL if an error occurred and the connection could not be | |
79 | * opened. | |
80 | */ | |
8efc0c15 | 81 | |
5260325f | 82 | AuthenticationConnection * |
83 | ssh_get_authentication_connection() | |
8efc0c15 | 84 | { |
5260325f | 85 | AuthenticationConnection *auth; |
86 | int sock; | |
87 | ||
88 | sock = ssh_get_authentication_socket(); | |
89 | ||
aa3378df | 90 | /* |
91 | * Fail if we couldn't obtain a connection. This happens if we | |
92 | * exited due to a timeout. | |
93 | */ | |
5260325f | 94 | if (sock < 0) |
95 | return NULL; | |
96 | ||
5260325f | 97 | auth = xmalloc(sizeof(*auth)); |
98 | auth->fd = sock; | |
99 | buffer_init(&auth->packet); | |
100 | buffer_init(&auth->identities); | |
101 | auth->howmany = 0; | |
102 | ||
103 | return auth; | |
8efc0c15 | 104 | } |
105 | ||
aa3378df | 106 | /* |
107 | * Closes the connection to the authentication agent and frees any associated | |
108 | * memory. | |
109 | */ | |
8efc0c15 | 110 | |
6ae2364d | 111 | void |
5260325f | 112 | ssh_close_authentication_connection(AuthenticationConnection *ac) |
8efc0c15 | 113 | { |
5260325f | 114 | buffer_free(&ac->packet); |
115 | buffer_free(&ac->identities); | |
116 | close(ac->fd); | |
117 | xfree(ac); | |
8efc0c15 | 118 | } |
119 | ||
aa3378df | 120 | /* |
121 | * Returns the first authentication identity held by the agent. | |
122 | * Returns true if an identity is available, 0 otherwise. | |
123 | * The caller must initialize the integers before the call, and free the | |
124 | * comment after a successful call (before calling ssh_get_next_identity). | |
125 | */ | |
8efc0c15 | 126 | |
127 | int | |
128 | ssh_get_first_identity(AuthenticationConnection *auth, | |
4d195447 | 129 | BIGNUM *e, BIGNUM *n, char **comment) |
8efc0c15 | 130 | { |
5260325f | 131 | unsigned char msg[8192]; |
132 | int len, l; | |
133 | ||
aa3378df | 134 | /* |
135 | * Send a message to the agent requesting for a list of the | |
136 | * identities it can represent. | |
137 | */ | |
5260325f | 138 | msg[0] = 0; |
139 | msg[1] = 0; | |
140 | msg[2] = 0; | |
141 | msg[3] = 1; | |
142 | msg[4] = SSH_AGENTC_REQUEST_RSA_IDENTITIES; | |
a408af76 | 143 | if (atomicio(write, auth->fd, msg, 5) != 5) { |
5260325f | 144 | error("write auth->fd: %.100s", strerror(errno)); |
145 | return 0; | |
146 | } | |
147 | /* Read the length of the response. XXX implement timeouts here. */ | |
148 | len = 4; | |
149 | while (len > 0) { | |
150 | l = read(auth->fd, msg + 4 - len, len); | |
151 | if (l <= 0) { | |
152 | error("read auth->fd: %.100s", strerror(errno)); | |
153 | return 0; | |
154 | } | |
155 | len -= l; | |
156 | } | |
157 | ||
aa3378df | 158 | /* |
159 | * Extract the length, and check it for sanity. (We cannot trust | |
160 | * authentication agents). | |
161 | */ | |
5260325f | 162 | len = GET_32BIT(msg); |
163 | if (len < 1 || len > 256 * 1024) | |
164 | fatal("Authentication reply message too long: %d\n", len); | |
165 | ||
166 | /* Read the packet itself. */ | |
167 | buffer_clear(&auth->identities); | |
168 | while (len > 0) { | |
169 | l = len; | |
170 | if (l > sizeof(msg)) | |
171 | l = sizeof(msg); | |
172 | l = read(auth->fd, msg, l); | |
173 | if (l <= 0) | |
174 | fatal("Incomplete authentication reply."); | |
175 | buffer_append(&auth->identities, (char *) msg, l); | |
176 | len -= l; | |
8efc0c15 | 177 | } |
5260325f | 178 | |
179 | /* Get message type, and verify that we got a proper answer. */ | |
180 | buffer_get(&auth->identities, (char *) msg, 1); | |
181 | if (msg[0] != SSH_AGENT_RSA_IDENTITIES_ANSWER) | |
182 | fatal("Bad authentication reply message type: %d", msg[0]); | |
183 | ||
184 | /* Get the number of entries in the response and check it for sanity. */ | |
185 | auth->howmany = buffer_get_int(&auth->identities); | |
186 | if (auth->howmany > 1024) | |
187 | fatal("Too many identities in authentication reply: %d\n", auth->howmany); | |
188 | ||
189 | /* Return the first entry (if any). */ | |
190 | return ssh_get_next_identity(auth, e, n, comment); | |
8efc0c15 | 191 | } |
192 | ||
aa3378df | 193 | /* |
194 | * Returns the next authentication identity for the agent. Other functions | |
195 | * can be called between this and ssh_get_first_identity or two calls of this | |
196 | * function. This returns 0 if there are no more identities. The caller | |
197 | * must free comment after a successful return. | |
198 | */ | |
8efc0c15 | 199 | |
200 | int | |
201 | ssh_get_next_identity(AuthenticationConnection *auth, | |
4d195447 | 202 | BIGNUM *e, BIGNUM *n, char **comment) |
8efc0c15 | 203 | { |
5260325f | 204 | unsigned int bits; |
4d195447 | 205 | |
5260325f | 206 | /* Return failure if no more entries. */ |
207 | if (auth->howmany <= 0) | |
208 | return 0; | |
8efc0c15 | 209 | |
aa3378df | 210 | /* |
211 | * Get the next entry from the packet. These will abort with a fatal | |
212 | * error if the packet is too short or contains corrupt data. | |
213 | */ | |
5260325f | 214 | bits = buffer_get_int(&auth->identities); |
215 | buffer_get_bignum(&auth->identities, e); | |
216 | buffer_get_bignum(&auth->identities, n); | |
217 | *comment = buffer_get_string(&auth->identities, NULL); | |
8efc0c15 | 218 | |
5260325f | 219 | if (bits != BN_num_bits(n)) |
0b242b12 | 220 | log("Warning: identity keysize mismatch: actual %d, announced %u", |
221 | BN_num_bits(n), bits); | |
4d195447 | 222 | |
5260325f | 223 | /* Decrement the number of remaining entries. */ |
224 | auth->howmany--; | |
8efc0c15 | 225 | |
5260325f | 226 | return 1; |
8efc0c15 | 227 | } |
228 | ||
aa3378df | 229 | /* |
230 | * Generates a random challenge, sends it to the agent, and waits for | |
231 | * response from the agent. Returns true (non-zero) if the agent gave the | |
232 | * correct answer, zero otherwise. Response type selects the style of | |
233 | * response desired, with 0 corresponding to protocol version 1.0 (no longer | |
234 | * supported) and 1 corresponding to protocol version 1.1. | |
235 | */ | |
8efc0c15 | 236 | |
237 | int | |
238 | ssh_decrypt_challenge(AuthenticationConnection *auth, | |
5260325f | 239 | BIGNUM* e, BIGNUM *n, BIGNUM *challenge, |
8efc0c15 | 240 | unsigned char session_id[16], |
241 | unsigned int response_type, | |
242 | unsigned char response[16]) | |
243 | { | |
5260325f | 244 | Buffer buffer; |
245 | unsigned char buf[8192]; | |
246 | int len, l, i; | |
247 | ||
248 | /* Response type 0 is no longer supported. */ | |
249 | if (response_type == 0) | |
250 | fatal("Compatibility with ssh protocol version 1.0 no longer supported."); | |
251 | ||
252 | /* Format a message to the agent. */ | |
253 | buf[0] = SSH_AGENTC_RSA_CHALLENGE; | |
254 | buffer_init(&buffer); | |
255 | buffer_append(&buffer, (char *) buf, 1); | |
256 | buffer_put_int(&buffer, BN_num_bits(n)); | |
257 | buffer_put_bignum(&buffer, e); | |
258 | buffer_put_bignum(&buffer, n); | |
259 | buffer_put_bignum(&buffer, challenge); | |
260 | buffer_append(&buffer, (char *) session_id, 16); | |
261 | buffer_put_int(&buffer, response_type); | |
262 | ||
263 | /* Get the length of the message, and format it in the buffer. */ | |
264 | len = buffer_len(&buffer); | |
265 | PUT_32BIT(buf, len); | |
266 | ||
267 | /* Send the length and then the packet to the agent. */ | |
a408af76 | 268 | if (atomicio(write, auth->fd, buf, 4) != 4 || |
269 | atomicio(write, auth->fd, buffer_ptr(&buffer), | |
270 | buffer_len(&buffer)) != buffer_len(&buffer)) { | |
5260325f | 271 | error("Error writing to authentication socket."); |
272 | error_cleanup: | |
273 | buffer_free(&buffer); | |
274 | return 0; | |
275 | } | |
aa3378df | 276 | /* |
277 | * Wait for response from the agent. First read the length of the | |
278 | * response packet. | |
279 | */ | |
5260325f | 280 | len = 4; |
281 | while (len > 0) { | |
282 | l = read(auth->fd, buf + 4 - len, len); | |
283 | if (l <= 0) { | |
284 | error("Error reading response length from authentication socket."); | |
285 | goto error_cleanup; | |
286 | } | |
287 | len -= l; | |
288 | } | |
289 | ||
290 | /* Extract the length, and check it for sanity. */ | |
291 | len = GET_32BIT(buf); | |
292 | if (len > 256 * 1024) | |
293 | fatal("Authentication response too long: %d", len); | |
294 | ||
295 | /* Read the rest of the response in tothe buffer. */ | |
296 | buffer_clear(&buffer); | |
297 | while (len > 0) { | |
298 | l = len; | |
299 | if (l > sizeof(buf)) | |
300 | l = sizeof(buf); | |
301 | l = read(auth->fd, buf, l); | |
302 | if (l <= 0) { | |
303 | error("Error reading response from authentication socket."); | |
304 | goto error_cleanup; | |
305 | } | |
306 | buffer_append(&buffer, (char *) buf, l); | |
307 | len -= l; | |
8efc0c15 | 308 | } |
5260325f | 309 | |
310 | /* Get the type of the packet. */ | |
311 | buffer_get(&buffer, (char *) buf, 1); | |
312 | ||
313 | /* Check for agent failure message. */ | |
314 | if (buf[0] == SSH_AGENT_FAILURE) { | |
315 | log("Agent admitted failure to authenticate using the key."); | |
316 | goto error_cleanup; | |
8efc0c15 | 317 | } |
5260325f | 318 | /* Now it must be an authentication response packet. */ |
319 | if (buf[0] != SSH_AGENT_RSA_RESPONSE) | |
320 | fatal("Bad authentication response: %d", buf[0]); | |
321 | ||
aa3378df | 322 | /* |
323 | * Get the response from the packet. This will abort with a fatal | |
324 | * error if the packet is corrupt. | |
325 | */ | |
5260325f | 326 | for (i = 0; i < 16; i++) |
327 | response[i] = buffer_get_char(&buffer); | |
328 | ||
329 | /* The buffer containing the packet is no longer needed. */ | |
330 | buffer_free(&buffer); | |
331 | ||
332 | /* Correct answer. */ | |
333 | return 1; | |
334 | } | |
8efc0c15 | 335 | |
aa3378df | 336 | /* |
337 | * Adds an identity to the authentication server. This call is not meant to | |
338 | * be used by normal applications. | |
339 | */ | |
8efc0c15 | 340 | |
6ae2364d | 341 | int |
5260325f | 342 | ssh_add_identity(AuthenticationConnection *auth, |
343 | RSA * key, const char *comment) | |
8efc0c15 | 344 | { |
5260325f | 345 | Buffer buffer; |
346 | unsigned char buf[8192]; | |
347 | int len, l, type; | |
348 | ||
349 | /* Format a message to the agent. */ | |
350 | buffer_init(&buffer); | |
351 | buffer_put_char(&buffer, SSH_AGENTC_ADD_RSA_IDENTITY); | |
352 | buffer_put_int(&buffer, BN_num_bits(key->n)); | |
353 | buffer_put_bignum(&buffer, key->n); | |
354 | buffer_put_bignum(&buffer, key->e); | |
355 | buffer_put_bignum(&buffer, key->d); | |
356 | /* To keep within the protocol: p < q for ssh. in SSL p > q */ | |
357 | buffer_put_bignum(&buffer, key->iqmp); /* ssh key->u */ | |
358 | buffer_put_bignum(&buffer, key->q); /* ssh key->p, SSL key->q */ | |
359 | buffer_put_bignum(&buffer, key->p); /* ssh key->q, SSL key->p */ | |
360 | buffer_put_string(&buffer, comment, strlen(comment)); | |
361 | ||
362 | /* Get the length of the message, and format it in the buffer. */ | |
363 | len = buffer_len(&buffer); | |
364 | PUT_32BIT(buf, len); | |
365 | ||
366 | /* Send the length and then the packet to the agent. */ | |
a408af76 | 367 | if (atomicio(write, auth->fd, buf, 4) != 4 || |
368 | atomicio(write, auth->fd, buffer_ptr(&buffer), | |
369 | buffer_len(&buffer)) != buffer_len(&buffer)) { | |
5260325f | 370 | error("Error writing to authentication socket."); |
371 | error_cleanup: | |
372 | buffer_free(&buffer); | |
373 | return 0; | |
374 | } | |
375 | /* Wait for response from the agent. First read the length of the | |
376 | response packet. */ | |
377 | len = 4; | |
378 | while (len > 0) { | |
379 | l = read(auth->fd, buf + 4 - len, len); | |
380 | if (l <= 0) { | |
381 | error("Error reading response length from authentication socket."); | |
382 | goto error_cleanup; | |
383 | } | |
384 | len -= l; | |
385 | } | |
386 | ||
387 | /* Extract the length, and check it for sanity. */ | |
388 | len = GET_32BIT(buf); | |
389 | if (len > 256 * 1024) | |
390 | fatal("Add identity response too long: %d", len); | |
391 | ||
392 | /* Read the rest of the response in tothe buffer. */ | |
393 | buffer_clear(&buffer); | |
394 | while (len > 0) { | |
395 | l = len; | |
396 | if (l > sizeof(buf)) | |
397 | l = sizeof(buf); | |
398 | l = read(auth->fd, buf, l); | |
399 | if (l <= 0) { | |
400 | error("Error reading response from authentication socket."); | |
401 | goto error_cleanup; | |
402 | } | |
403 | buffer_append(&buffer, (char *) buf, l); | |
404 | len -= l; | |
8efc0c15 | 405 | } |
5260325f | 406 | |
407 | /* Get the type of the packet. */ | |
408 | type = buffer_get_char(&buffer); | |
409 | switch (type) { | |
410 | case SSH_AGENT_FAILURE: | |
411 | buffer_free(&buffer); | |
412 | return 0; | |
413 | case SSH_AGENT_SUCCESS: | |
414 | buffer_free(&buffer); | |
415 | return 1; | |
416 | default: | |
417 | fatal("Bad response to add identity from authentication agent: %d", | |
418 | type); | |
8efc0c15 | 419 | } |
5260325f | 420 | /* NOTREACHED */ |
421 | return 0; | |
422 | } | |
423 | ||
aa3378df | 424 | /* |
425 | * Removes an identity from the authentication server. This call is not | |
426 | * meant to be used by normal applications. | |
427 | */ | |
8efc0c15 | 428 | |
6ae2364d | 429 | int |
5260325f | 430 | ssh_remove_identity(AuthenticationConnection *auth, RSA *key) |
8efc0c15 | 431 | { |
5260325f | 432 | Buffer buffer; |
433 | unsigned char buf[8192]; | |
434 | int len, l, type; | |
435 | ||
436 | /* Format a message to the agent. */ | |
437 | buffer_init(&buffer); | |
438 | buffer_put_char(&buffer, SSH_AGENTC_REMOVE_RSA_IDENTITY); | |
439 | buffer_put_int(&buffer, BN_num_bits(key->n)); | |
440 | buffer_put_bignum(&buffer, key->e); | |
441 | buffer_put_bignum(&buffer, key->n); | |
442 | ||
443 | /* Get the length of the message, and format it in the buffer. */ | |
444 | len = buffer_len(&buffer); | |
445 | PUT_32BIT(buf, len); | |
446 | ||
447 | /* Send the length and then the packet to the agent. */ | |
a408af76 | 448 | if (atomicio(write, auth->fd, buf, 4) != 4 || |
449 | atomicio(write, auth->fd, buffer_ptr(&buffer), | |
450 | buffer_len(&buffer)) != buffer_len(&buffer)) { | |
5260325f | 451 | error("Error writing to authentication socket."); |
452 | error_cleanup: | |
453 | buffer_free(&buffer); | |
454 | return 0; | |
455 | } | |
aa3378df | 456 | /* |
457 | * Wait for response from the agent. First read the length of the | |
458 | * response packet. | |
459 | */ | |
5260325f | 460 | len = 4; |
461 | while (len > 0) { | |
462 | l = read(auth->fd, buf + 4 - len, len); | |
463 | if (l <= 0) { | |
464 | error("Error reading response length from authentication socket."); | |
465 | goto error_cleanup; | |
466 | } | |
467 | len -= l; | |
468 | } | |
469 | ||
470 | /* Extract the length, and check it for sanity. */ | |
471 | len = GET_32BIT(buf); | |
472 | if (len > 256 * 1024) | |
473 | fatal("Remove identity response too long: %d", len); | |
474 | ||
475 | /* Read the rest of the response in tothe buffer. */ | |
476 | buffer_clear(&buffer); | |
477 | while (len > 0) { | |
478 | l = len; | |
479 | if (l > sizeof(buf)) | |
480 | l = sizeof(buf); | |
481 | l = read(auth->fd, buf, l); | |
482 | if (l <= 0) { | |
483 | error("Error reading response from authentication socket."); | |
484 | goto error_cleanup; | |
485 | } | |
486 | buffer_append(&buffer, (char *) buf, l); | |
487 | len -= l; | |
8efc0c15 | 488 | } |
5260325f | 489 | |
490 | /* Get the type of the packet. */ | |
491 | type = buffer_get_char(&buffer); | |
492 | switch (type) { | |
493 | case SSH_AGENT_FAILURE: | |
494 | buffer_free(&buffer); | |
495 | return 0; | |
496 | case SSH_AGENT_SUCCESS: | |
497 | buffer_free(&buffer); | |
498 | return 1; | |
499 | default: | |
500 | fatal("Bad response to remove identity from authentication agent: %d", | |
501 | type); | |
8efc0c15 | 502 | } |
5260325f | 503 | /* NOTREACHED */ |
504 | return 0; | |
505 | } | |
506 | ||
aa3378df | 507 | /* |
508 | * Removes all identities from the agent. This call is not meant to be used | |
509 | * by normal applications. | |
510 | */ | |
8efc0c15 | 511 | |
6ae2364d | 512 | int |
5260325f | 513 | ssh_remove_all_identities(AuthenticationConnection *auth) |
8efc0c15 | 514 | { |
5260325f | 515 | Buffer buffer; |
516 | unsigned char buf[8192]; | |
517 | int len, l, type; | |
518 | ||
519 | /* Get the length of the message, and format it in the buffer. */ | |
520 | PUT_32BIT(buf, 1); | |
521 | buf[4] = SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES; | |
522 | ||
523 | /* Send the length and then the packet to the agent. */ | |
a408af76 | 524 | if (atomicio(write, auth->fd, buf, 5) != 5) { |
5260325f | 525 | error("Error writing to authentication socket."); |
526 | return 0; | |
527 | } | |
aa3378df | 528 | /* |
529 | * Wait for response from the agent. First read the length of the | |
530 | * response packet. | |
531 | */ | |
5260325f | 532 | len = 4; |
533 | while (len > 0) { | |
534 | l = read(auth->fd, buf + 4 - len, len); | |
535 | if (l <= 0) { | |
536 | error("Error reading response length from authentication socket."); | |
537 | return 0; | |
538 | } | |
539 | len -= l; | |
540 | } | |
541 | ||
542 | /* Extract the length, and check it for sanity. */ | |
543 | len = GET_32BIT(buf); | |
544 | if (len > 256 * 1024) | |
545 | fatal("Remove identity response too long: %d", len); | |
546 | ||
547 | /* Read the rest of the response into the buffer. */ | |
548 | buffer_init(&buffer); | |
549 | while (len > 0) { | |
550 | l = len; | |
551 | if (l > sizeof(buf)) | |
552 | l = sizeof(buf); | |
553 | l = read(auth->fd, buf, l); | |
554 | if (l <= 0) { | |
555 | error("Error reading response from authentication socket."); | |
556 | buffer_free(&buffer); | |
557 | return 0; | |
558 | } | |
559 | buffer_append(&buffer, (char *) buf, l); | |
560 | len -= l; | |
8efc0c15 | 561 | } |
5260325f | 562 | |
563 | /* Get the type of the packet. */ | |
564 | type = buffer_get_char(&buffer); | |
565 | switch (type) { | |
566 | case SSH_AGENT_FAILURE: | |
567 | buffer_free(&buffer); | |
568 | return 0; | |
569 | case SSH_AGENT_SUCCESS: | |
570 | buffer_free(&buffer); | |
571 | return 1; | |
572 | default: | |
573 | fatal("Bad response to remove identity from authentication agent: %d", | |
574 | type); | |
8efc0c15 | 575 | } |
5260325f | 576 | /* NOTREACHED */ |
577 | return 0; | |
578 | } |