Annotation of src/crypto/external/bsd/openssh/dist/authfd.c, Revision 1.5
1.5 ! christos 1: /* $NetBSD: authfd.c,v 1.4 2011/07/25 03:03:10 christos Exp $ */
! 2: /* $OpenBSD: authfd.c,v 1.86 2011/07/06 18:09:21 tedu Exp $ */
1.1 christos 3: /*
4: * Author: Tatu Ylonen <ylo@cs.hut.fi>
5: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6: * All rights reserved
7: * Functions for connecting the local authentication agent.
8: *
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: *
15: * SSH2 implementation,
16: * Copyright (c) 2000 Markus Friedl. All rights reserved.
17: *
18: * Redistribution and use in source and binary forms, with or without
19: * modification, are permitted provided that the following conditions
20: * are met:
21: * 1. Redistributions of source code must retain the above copyright
22: * notice, this list of conditions and the following disclaimer.
23: * 2. Redistributions in binary form must reproduce the above copyright
24: * notice, this list of conditions and the following disclaimer in the
25: * documentation and/or other materials provided with the distribution.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
28: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
29: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
30: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
31: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
32: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
36: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37: */
38:
1.2 christos 39: #include "includes.h"
1.5 ! christos 40: __RCSID("$NetBSD: authfd.c,v 1.4 2011/07/25 03:03:10 christos Exp $");
1.1 christos 41: #include <sys/types.h>
42: #include <sys/un.h>
43: #include <sys/socket.h>
44:
45: #include <openssl/evp.h>
46:
47: #include <openssl/crypto.h>
48: #include <fcntl.h>
49: #include <stdlib.h>
50: #include <signal.h>
51: #include <string.h>
52: #include <unistd.h>
53:
54: #include "xmalloc.h"
55: #include "ssh.h"
56: #include "rsa.h"
57: #include "buffer.h"
58: #include "key.h"
59: #include "authfd.h"
60: #include "cipher.h"
61: #include "kex.h"
62: #include "compat.h"
63: #include "log.h"
64: #include "atomicio.h"
65: #include "misc.h"
66:
67: static int agent_present = 0;
68:
69: /* helper */
70: int decode_reply(int type);
71:
72: /* macro to check for "agent failure" message */
73: #define agent_failed(x) \
74: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
75: (x == SSH2_AGENT_FAILURE))
76:
77: int
78: ssh_agent_present(void)
79: {
80: int authfd;
81:
82: if (agent_present)
83: return 1;
84: if ((authfd = ssh_get_authentication_socket()) == -1)
85: return 0;
86: else {
87: ssh_close_authentication_socket(authfd);
88: return 1;
89: }
90: }
91:
92: /* Returns the number of the authentication fd, or -1 if there is none. */
93:
94: int
95: ssh_get_authentication_socket(void)
96: {
97: const char *authsocket;
98: int sock;
99: struct sockaddr_un sunaddr;
100:
101: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
102: if (!authsocket)
103: return -1;
104:
1.5 ! christos 105: bzero(&sunaddr, sizeof(sunaddr));
1.1 christos 106: sunaddr.sun_family = AF_UNIX;
107: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
108:
109: sock = socket(AF_UNIX, SOCK_STREAM, 0);
110: if (sock < 0)
111: return -1;
112:
113: /* close on exec */
1.5 ! christos 114: if (fcntl(sock, F_SETFD, FD_CLOEXEC) == -1) {
1.1 christos 115: close(sock);
116: return -1;
117: }
1.5 ! christos 118: if (connect(sock, (struct sockaddr *)(void *)&sunaddr, sizeof sunaddr) < 0) {
1.1 christos 119: close(sock);
120: return -1;
121: }
122: agent_present = 1;
123: return sock;
124: }
125:
126: static int
127: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
128: {
129: u_int l, len;
130: char buf[1024];
131:
132: /* Get the length of the message, and format it in the buffer. */
133: len = buffer_len(request);
134: put_u32(buf, len);
135:
136: /* Send the length and then the packet to the agent. */
137: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
138: atomicio(vwrite, auth->fd, buffer_ptr(request),
139: buffer_len(request)) != buffer_len(request)) {
140: error("Error writing to authentication socket.");
141: return 0;
142: }
143: /*
144: * Wait for response from the agent. First read the length of the
145: * response packet.
146: */
147: if (atomicio(read, auth->fd, buf, 4) != 4) {
148: error("Error reading response length from authentication socket.");
149: return 0;
150: }
151:
152: /* Extract the length, and check it for sanity. */
153: len = get_u32(buf);
154: if (len > 256 * 1024)
155: fatal("Authentication response too long: %u", len);
156:
157: /* Read the rest of the response in to the buffer. */
158: buffer_clear(reply);
159: while (len > 0) {
160: l = len;
161: if (l > sizeof(buf))
162: l = sizeof(buf);
163: if (atomicio(read, auth->fd, buf, l) != l) {
164: error("Error reading response from authentication socket.");
165: return 0;
166: }
167: buffer_append(reply, buf, l);
168: len -= l;
169: }
170: return 1;
171: }
172:
173: /*
174: * Closes the agent socket if it should be closed (depends on how it was
175: * obtained). The argument must have been returned by
176: * ssh_get_authentication_socket().
177: */
178:
179: void
180: ssh_close_authentication_socket(int sock)
181: {
182: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
183: close(sock);
184: }
185:
186: /*
187: * Opens and connects a private socket for communication with the
188: * authentication agent. Returns the file descriptor (which must be
189: * shut down and closed by the caller when no longer needed).
190: * Returns NULL if an error occurred and the connection could not be
191: * opened.
192: */
193:
194: AuthenticationConnection *
195: ssh_get_authentication_connection(void)
196: {
197: AuthenticationConnection *auth;
198: int sock;
199:
200: sock = ssh_get_authentication_socket();
201:
202: /*
203: * Fail if we couldn't obtain a connection. This happens if we
204: * exited due to a timeout.
205: */
206: if (sock < 0)
207: return NULL;
208:
209: auth = xmalloc(sizeof(*auth));
210: auth->fd = sock;
211: buffer_init(&auth->identities);
212: auth->howmany = 0;
213:
214: return auth;
215: }
216:
217: /*
218: * Closes the connection to the authentication agent and frees any associated
219: * memory.
220: */
221:
222: void
223: ssh_close_authentication_connection(AuthenticationConnection *auth)
224: {
225: buffer_free(&auth->identities);
226: close(auth->fd);
227: xfree(auth);
228: }
229:
230: /* Lock/unlock agent */
231: int
232: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
233: {
234: int type;
235: Buffer msg;
236:
237: buffer_init(&msg);
238: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
239: buffer_put_cstring(&msg, password);
240:
241: if (ssh_request_reply(auth, &msg, &msg) == 0) {
242: buffer_free(&msg);
243: return 0;
244: }
245: type = buffer_get_char(&msg);
246: buffer_free(&msg);
247: return decode_reply(type);
248: }
249:
250: /*
251: * Returns the first authentication identity held by the agent.
252: */
253:
254: int
255: ssh_get_num_identities(AuthenticationConnection *auth, int version)
256: {
257: int type, code1 = 0, code2 = 0;
258: Buffer request;
259:
260: switch (version) {
261: case 1:
262: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
263: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
264: break;
265: case 2:
266: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
267: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
268: break;
269: default:
270: return 0;
271: }
272:
273: /*
274: * Send a message to the agent requesting for a list of the
275: * identities it can represent.
276: */
277: buffer_init(&request);
278: buffer_put_char(&request, code1);
279:
280: buffer_clear(&auth->identities);
281: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
282: buffer_free(&request);
283: return 0;
284: }
285: buffer_free(&request);
286:
287: /* Get message type, and verify that we got a proper answer. */
288: type = buffer_get_char(&auth->identities);
289: if (agent_failed(type)) {
290: return 0;
291: } else if (type != code2) {
292: fatal("Bad authentication reply message type: %d", type);
293: }
294:
295: /* Get the number of entries in the response and check it for sanity. */
296: auth->howmany = buffer_get_int(&auth->identities);
297: if ((u_int)auth->howmany > 1024)
298: fatal("Too many identities in authentication reply: %d",
299: auth->howmany);
300:
301: return auth->howmany;
302: }
303:
304: Key *
305: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
306: {
307: /* get number of identities and return the first entry (if any). */
308: if (ssh_get_num_identities(auth, version) > 0)
309: return ssh_get_next_identity(auth, comment, version);
310: return NULL;
311: }
312:
313: Key *
314: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
315: {
316: int keybits;
317: u_int bits;
318: u_char *blob;
319: u_int blen;
320: Key *key = NULL;
321:
322: /* Return failure if no more entries. */
323: if (auth->howmany <= 0)
324: return NULL;
325:
326: /*
327: * Get the next entry from the packet. These will abort with a fatal
328: * error if the packet is too short or contains corrupt data.
329: */
330: switch (version) {
331: case 1:
332: key = key_new(KEY_RSA1);
333: bits = buffer_get_int(&auth->identities);
334: buffer_get_bignum(&auth->identities, key->rsa->e);
335: buffer_get_bignum(&auth->identities, key->rsa->n);
336: *comment = buffer_get_string(&auth->identities, NULL);
337: keybits = BN_num_bits(key->rsa->n);
338: if (keybits < 0 || bits != (u_int)keybits)
339: logit("Warning: identity keysize mismatch: actual %d, announced %u",
340: BN_num_bits(key->rsa->n), bits);
341: break;
342: case 2:
343: blob = buffer_get_string(&auth->identities, &blen);
344: *comment = buffer_get_string(&auth->identities, NULL);
345: key = key_from_blob(blob, blen);
346: xfree(blob);
347: break;
348: default:
349: return NULL;
350: }
351: /* Decrement the number of remaining entries. */
352: auth->howmany--;
353: return key;
354: }
355:
356: /*
357: * Generates a random challenge, sends it to the agent, and waits for
358: * response from the agent. Returns true (non-zero) if the agent gave the
359: * correct answer, zero otherwise. Response type selects the style of
360: * response desired, with 0 corresponding to protocol version 1.0 (no longer
361: * supported) and 1 corresponding to protocol version 1.1.
362: */
363:
364: int
365: ssh_decrypt_challenge(AuthenticationConnection *auth,
366: Key* key, BIGNUM *challenge,
367: u_char session_id[16],
368: u_int response_type,
369: u_char response[16])
370: {
371: Buffer buffer;
372: int success = 0;
373: int i;
374: int type;
375:
376: if (key->type != KEY_RSA1)
377: return 0;
378: if (response_type == 0) {
379: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
380: return 0;
381: }
382: buffer_init(&buffer);
383: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
384: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
385: buffer_put_bignum(&buffer, key->rsa->e);
386: buffer_put_bignum(&buffer, key->rsa->n);
387: buffer_put_bignum(&buffer, challenge);
388: buffer_append(&buffer, session_id, 16);
389: buffer_put_int(&buffer, response_type);
390:
391: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
392: buffer_free(&buffer);
393: return 0;
394: }
395: type = buffer_get_char(&buffer);
396:
397: if (agent_failed(type)) {
398: logit("Agent admitted failure to authenticate using the key.");
399: } else if (type != SSH_AGENT_RSA_RESPONSE) {
400: fatal("Bad authentication response: %d", type);
401: } else {
402: success = 1;
403: /*
404: * Get the response from the packet. This will abort with a
405: * fatal error if the packet is corrupt.
406: */
407: for (i = 0; i < 16; i++)
408: response[i] = (u_char)buffer_get_char(&buffer);
409: }
410: buffer_free(&buffer);
411: return success;
412: }
413:
414: /* ask agent to sign data, returns -1 on error, 0 on success */
415: int
416: ssh_agent_sign(AuthenticationConnection *auth,
417: Key *key,
418: u_char **sigp, u_int *lenp,
419: u_char *data, u_int datalen)
420: {
421: extern int datafellows;
422: Buffer msg;
423: u_char *blob;
424: u_int blen;
425: int type, flags = 0;
426: int ret = -1;
427:
428: if (key_to_blob(key, &blob, &blen) == 0)
429: return -1;
430:
431: if (datafellows & SSH_BUG_SIGBLOB)
432: flags = SSH_AGENT_OLD_SIGNATURE;
433:
434: buffer_init(&msg);
435: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
436: buffer_put_string(&msg, blob, blen);
437: buffer_put_string(&msg, data, datalen);
438: buffer_put_int(&msg, flags);
439: xfree(blob);
440:
441: if (ssh_request_reply(auth, &msg, &msg) == 0) {
442: buffer_free(&msg);
443: return -1;
444: }
445: type = buffer_get_char(&msg);
446: if (agent_failed(type)) {
447: logit("Agent admitted failure to sign using the key.");
448: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
449: fatal("Bad authentication response: %d", type);
450: } else {
451: ret = 0;
452: *sigp = buffer_get_string(&msg, lenp);
453: }
454: buffer_free(&msg);
455: return ret;
456: }
457:
458: /* Encode key for a message to the agent. */
459:
460: static void
461: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
462: {
463: buffer_put_int(b, BN_num_bits(key->n));
464: buffer_put_bignum(b, key->n);
465: buffer_put_bignum(b, key->e);
466: buffer_put_bignum(b, key->d);
467: /* To keep within the protocol: p < q for ssh. in SSL p > q */
468: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
469: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
470: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
471: buffer_put_cstring(b, comment);
472: }
473:
474: static void
475: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
476: {
477: buffer_put_cstring(b, key_ssh_name(key));
478: switch (key->type) {
479: case KEY_RSA:
480: buffer_put_bignum2(b, key->rsa->n);
481: buffer_put_bignum2(b, key->rsa->e);
482: buffer_put_bignum2(b, key->rsa->d);
483: buffer_put_bignum2(b, key->rsa->iqmp);
484: buffer_put_bignum2(b, key->rsa->p);
485: buffer_put_bignum2(b, key->rsa->q);
486: break;
1.3 adam 487: case KEY_RSA_CERT_V00:
488: case KEY_RSA_CERT:
489: if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0)
490: fatal("%s: no cert/certblob", __func__);
491: buffer_put_string(b, buffer_ptr(&key->cert->certblob),
492: buffer_len(&key->cert->certblob));
493: buffer_put_bignum2(b, key->rsa->d);
494: buffer_put_bignum2(b, key->rsa->iqmp);
495: buffer_put_bignum2(b, key->rsa->p);
496: buffer_put_bignum2(b, key->rsa->q);
497: break;
1.1 christos 498: case KEY_DSA:
499: buffer_put_bignum2(b, key->dsa->p);
500: buffer_put_bignum2(b, key->dsa->q);
501: buffer_put_bignum2(b, key->dsa->g);
502: buffer_put_bignum2(b, key->dsa->pub_key);
503: buffer_put_bignum2(b, key->dsa->priv_key);
504: break;
1.3 adam 505: case KEY_DSA_CERT_V00:
506: case KEY_DSA_CERT:
507: if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0)
508: fatal("%s: no cert/certblob", __func__);
509: buffer_put_string(b, buffer_ptr(&key->cert->certblob),
510: buffer_len(&key->cert->certblob));
511: buffer_put_bignum2(b, key->dsa->priv_key);
512: break;
1.4 christos 513: case KEY_ECDSA:
514: buffer_put_cstring(b, key_curve_nid_to_name(key->ecdsa_nid));
515: buffer_put_ecpoint(b, EC_KEY_get0_group(key->ecdsa),
516: EC_KEY_get0_public_key(key->ecdsa));
517: buffer_put_bignum2(b, EC_KEY_get0_private_key(key->ecdsa));
518: break;
519: case KEY_ECDSA_CERT:
520: if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0)
521: fatal("%s: no cert/certblob", __func__);
522: buffer_put_string(b, buffer_ptr(&key->cert->certblob),
523: buffer_len(&key->cert->certblob));
524: buffer_put_bignum2(b, EC_KEY_get0_private_key(key->ecdsa));
525: break;
1.1 christos 526: }
527: buffer_put_cstring(b, comment);
528: }
529:
530: /*
531: * Adds an identity to the authentication server. This call is not meant to
532: * be used by normal applications.
533: */
534:
535: int
536: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
537: const char *comment, u_int life, u_int confirm)
538: {
539: Buffer msg;
540: int type, constrained = (life || confirm);
541:
542: buffer_init(&msg);
543:
544: switch (key->type) {
545: case KEY_RSA1:
546: type = constrained ?
547: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
548: SSH_AGENTC_ADD_RSA_IDENTITY;
549: buffer_put_char(&msg, type);
550: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
551: break;
552: case KEY_RSA:
1.3 adam 553: case KEY_RSA_CERT:
554: case KEY_RSA_CERT_V00:
1.1 christos 555: case KEY_DSA:
1.3 adam 556: case KEY_DSA_CERT:
557: case KEY_DSA_CERT_V00:
1.4 christos 558: case KEY_ECDSA:
559: case KEY_ECDSA_CERT:
1.1 christos 560: type = constrained ?
561: SSH2_AGENTC_ADD_ID_CONSTRAINED :
562: SSH2_AGENTC_ADD_IDENTITY;
563: buffer_put_char(&msg, type);
564: ssh_encode_identity_ssh2(&msg, key, comment);
565: break;
566: default:
567: buffer_free(&msg);
568: return 0;
569: }
570: if (constrained) {
571: if (life != 0) {
572: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
573: buffer_put_int(&msg, life);
574: }
575: if (confirm != 0)
576: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
577: }
578: if (ssh_request_reply(auth, &msg, &msg) == 0) {
579: buffer_free(&msg);
580: return 0;
581: }
582: type = buffer_get_char(&msg);
583: buffer_free(&msg);
584: return decode_reply(type);
585: }
586:
587: /*
588: * Removes an identity from the authentication server. This call is not
589: * meant to be used by normal applications.
590: */
591:
592: int
593: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
594: {
595: Buffer msg;
596: int type;
597: u_char *blob;
598: u_int blen;
599:
600: buffer_init(&msg);
601:
602: if (key->type == KEY_RSA1) {
603: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
604: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
605: buffer_put_bignum(&msg, key->rsa->e);
606: buffer_put_bignum(&msg, key->rsa->n);
1.3 adam 607: } else if (key_type_plain(key->type) == KEY_DSA ||
1.4 christos 608: key_type_plain(key->type) == KEY_RSA ||
609: key_type_plain(key->type) == KEY_ECDSA) {
1.1 christos 610: key_to_blob(key, &blob, &blen);
611: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
612: buffer_put_string(&msg, blob, blen);
613: xfree(blob);
614: } else {
615: buffer_free(&msg);
616: return 0;
617: }
618: if (ssh_request_reply(auth, &msg, &msg) == 0) {
619: buffer_free(&msg);
620: return 0;
621: }
622: type = buffer_get_char(&msg);
623: buffer_free(&msg);
624: return decode_reply(type);
625: }
626:
627: int
628: ssh_update_card(AuthenticationConnection *auth, int add,
629: const char *reader_id, const char *pin, u_int life, u_int confirm)
630: {
631: Buffer msg;
632: int type, constrained = (life || confirm);
633:
634: if (add) {
635: type = constrained ?
636: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
637: SSH_AGENTC_ADD_SMARTCARD_KEY;
638: } else
639: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
640:
641: buffer_init(&msg);
642: buffer_put_char(&msg, type);
643: buffer_put_cstring(&msg, reader_id);
644: buffer_put_cstring(&msg, pin);
645:
646: if (constrained) {
647: if (life != 0) {
648: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
649: buffer_put_int(&msg, life);
650: }
651: if (confirm != 0)
652: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
653: }
654:
655: if (ssh_request_reply(auth, &msg, &msg) == 0) {
656: buffer_free(&msg);
657: return 0;
658: }
659: type = buffer_get_char(&msg);
660: buffer_free(&msg);
661: return decode_reply(type);
662: }
663:
664: /*
665: * Removes all identities from the agent. This call is not meant to be used
666: * by normal applications.
667: */
668:
669: int
670: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
671: {
672: Buffer msg;
673: int type;
674: int code = (version==1) ?
675: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
676: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
677:
678: buffer_init(&msg);
679: buffer_put_char(&msg, code);
680:
681: if (ssh_request_reply(auth, &msg, &msg) == 0) {
682: buffer_free(&msg);
683: return 0;
684: }
685: type = buffer_get_char(&msg);
686: buffer_free(&msg);
687: return decode_reply(type);
688: }
689:
690: int
691: decode_reply(int type)
692: {
693: switch (type) {
694: case SSH_AGENT_FAILURE:
695: case SSH_COM_AGENT2_FAILURE:
696: case SSH2_AGENT_FAILURE:
697: logit("SSH_AGENT_FAILURE");
698: return 0;
699: case SSH_AGENT_SUCCESS:
700: return 1;
701: default:
702: fatal("Bad response from authentication agent: %d", type);
703: }
704: /* NOTREACHED */
705: return 0;
706: }
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