Annotation of src/usr.bin/ssh/authfd.c, Revision 1.45.2.4
1.1 deraadt 1: /*
1.13 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
1.27 deraadt 5: * Functions for connecting the local authentication agent.
1.18 markus 6: *
1.27 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.18 markus 12: *
1.25 markus 13: * SSH2 implementation,
1.27 deraadt 14: * Copyright (c) 2000 Markus Friedl. All rights reserved.
1.25 markus 15: *
1.27 deraadt 16: * Redistribution and use in source and binary forms, with or without
17: * modification, are permitted provided that the following conditions
18: * are met:
19: * 1. Redistributions of source code must retain the above copyright
20: * notice, this list of conditions and the following disclaimer.
21: * 2. Redistributions in binary form must reproduce the above copyright
22: * notice, this list of conditions and the following disclaimer in the
23: * documentation and/or other materials provided with the distribution.
24: *
25: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.13 deraadt 35: */
1.1 deraadt 36:
37: #include "includes.h"
1.45.2.4! miod 38: RCSID("$OpenBSD: authfd.c,v 1.45.2.3 2002/06/22 07:23:17 miod Exp $");
1.33 markus 39:
40: #include <openssl/evp.h>
1.1 deraadt 41:
42: #include "ssh.h"
43: #include "rsa.h"
44: #include "buffer.h"
45: #include "bufaux.h"
46: #include "xmalloc.h"
47: #include "getput.h"
1.22 markus 48: #include "key.h"
49: #include "authfd.h"
1.33 markus 50: #include "cipher.h"
1.22 markus 51: #include "kex.h"
1.28 markus 52: #include "compat.h"
1.33 markus 53: #include "log.h"
54: #include "atomicio.h"
1.2 provos 55:
1.21 markus 56: /* helper */
1.24 markus 57: int decode_reply(int type);
1.21 markus 58:
1.29 markus 59: /* macro to check for "agent failure" message */
60: #define agent_failed(x) \
1.44 markus 61: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.45.2.3 miod 62: (x == SSH2_AGENT_FAILURE))
1.29 markus 63:
1.1 deraadt 64: /* Returns the number of the authentication fd, or -1 if there is none. */
65:
1.2 provos 66: int
1.32 markus 67: ssh_get_authentication_socket(void)
1.1 deraadt 68: {
1.12 markus 69: const char *authsocket;
1.45 stevesk 70: int sock;
1.12 markus 71: struct sockaddr_un sunaddr;
72:
73: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
74: if (!authsocket)
75: return -1;
76:
77: sunaddr.sun_family = AF_UNIX;
78: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
79:
80: sock = socket(AF_UNIX, SOCK_STREAM, 0);
81: if (sock < 0)
82: return -1;
83:
84: /* close on exec */
85: if (fcntl(sock, F_SETFD, 1) == -1) {
86: close(sock);
87: return -1;
88: }
1.45 stevesk 89: if (connect(sock, (struct sockaddr *) &sunaddr, sizeof sunaddr) < 0) {
1.12 markus 90: close(sock);
91: return -1;
92: }
93: return sock;
1.1 deraadt 94: }
95:
1.41 itojun 96: static int
1.25 markus 97: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 98: {
99: int l, len;
100: char buf[1024];
101:
102: /* Get the length of the message, and format it in the buffer. */
103: len = buffer_len(request);
104: PUT_32BIT(buf, len);
105:
106: /* Send the length and then the packet to the agent. */
107: if (atomicio(write, auth->fd, buf, 4) != 4 ||
108: atomicio(write, auth->fd, buffer_ptr(request),
109: buffer_len(request)) != buffer_len(request)) {
110: error("Error writing to authentication socket.");
111: return 0;
112: }
113: /*
114: * Wait for response from the agent. First read the length of the
115: * response packet.
116: */
117: len = 4;
118: while (len > 0) {
119: l = read(auth->fd, buf + 4 - len, len);
1.38 deraadt 120: if (l == -1 && (errno == EAGAIN || errno == EINTR))
1.39 markus 121: continue;
1.24 markus 122: if (l <= 0) {
123: error("Error reading response length from authentication socket.");
124: return 0;
125: }
126: len -= l;
127: }
128:
129: /* Extract the length, and check it for sanity. */
130: len = GET_32BIT(buf);
131: if (len > 256 * 1024)
132: fatal("Authentication response too long: %d", len);
133:
134: /* Read the rest of the response in to the buffer. */
135: buffer_clear(reply);
136: while (len > 0) {
137: l = len;
138: if (l > sizeof(buf))
139: l = sizeof(buf);
140: l = read(auth->fd, buf, l);
1.38 deraadt 141: if (l == -1 && (errno == EAGAIN || errno == EINTR))
1.39 markus 142: continue;
1.24 markus 143: if (l <= 0) {
144: error("Error reading response from authentication socket.");
145: return 0;
146: }
1.45.2.4! miod 147: buffer_append(reply, buf, l);
1.24 markus 148: len -= l;
149: }
150: return 1;
151: }
152:
1.14 markus 153: /*
154: * Closes the agent socket if it should be closed (depends on how it was
155: * obtained). The argument must have been returned by
156: * ssh_get_authentication_socket().
157: */
1.1 deraadt 158:
1.18 markus 159: void
1.12 markus 160: ssh_close_authentication_socket(int sock)
1.1 deraadt 161: {
1.12 markus 162: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
163: close(sock);
1.1 deraadt 164: }
165:
1.14 markus 166: /*
167: * Opens and connects a private socket for communication with the
168: * authentication agent. Returns the file descriptor (which must be
169: * shut down and closed by the caller when no longer needed).
170: * Returns NULL if an error occurred and the connection could not be
171: * opened.
172: */
1.1 deraadt 173:
1.12 markus 174: AuthenticationConnection *
1.32 markus 175: ssh_get_authentication_connection(void)
1.1 deraadt 176: {
1.12 markus 177: AuthenticationConnection *auth;
178: int sock;
1.1 deraadt 179:
1.12 markus 180: sock = ssh_get_authentication_socket();
181:
1.14 markus 182: /*
183: * Fail if we couldn't obtain a connection. This happens if we
184: * exited due to a timeout.
185: */
1.12 markus 186: if (sock < 0)
187: return NULL;
188:
189: auth = xmalloc(sizeof(*auth));
190: auth->fd = sock;
191: buffer_init(&auth->identities);
192: auth->howmany = 0;
193:
194: return auth;
1.1 deraadt 195: }
196:
1.14 markus 197: /*
198: * Closes the connection to the authentication agent and frees any associated
199: * memory.
200: */
1.1 deraadt 201:
1.18 markus 202: void
1.25 markus 203: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 204: {
1.25 markus 205: buffer_free(&auth->identities);
206: close(auth->fd);
207: xfree(auth);
1.1 deraadt 208: }
209:
1.45.2.3 miod 210: /* Lock/unlock agent */
211: int
212: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
213: {
214: int type;
215: Buffer msg;
216:
217: buffer_init(&msg);
218: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
219: buffer_put_cstring(&msg, password);
220:
221: if (ssh_request_reply(auth, &msg, &msg) == 0) {
222: buffer_free(&msg);
223: return 0;
224: }
225: type = buffer_get_char(&msg);
226: buffer_free(&msg);
227: return decode_reply(type);
228: }
229:
1.14 markus 230: /*
231: * Returns the first authentication identity held by the agent.
232: */
1.1 deraadt 233:
1.30 markus 234: int
235: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 236: {
1.25 markus 237: int type, code1 = 0, code2 = 0;
1.24 markus 238: Buffer request;
1.25 markus 239:
1.45.2.1 jason 240: switch (version) {
1.25 markus 241: case 1:
242: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
243: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
244: break;
245: case 2:
246: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
247: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
248: break;
249: default:
1.30 markus 250: return 0;
1.25 markus 251: }
1.1 deraadt 252:
1.14 markus 253: /*
254: * Send a message to the agent requesting for a list of the
255: * identities it can represent.
256: */
1.24 markus 257: buffer_init(&request);
1.25 markus 258: buffer_put_char(&request, code1);
1.12 markus 259:
260: buffer_clear(&auth->identities);
1.24 markus 261: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
262: buffer_free(&request);
1.30 markus 263: return 0;
1.12 markus 264: }
1.24 markus 265: buffer_free(&request);
1.1 deraadt 266:
1.12 markus 267: /* Get message type, and verify that we got a proper answer. */
1.24 markus 268: type = buffer_get_char(&auth->identities);
1.29 markus 269: if (agent_failed(type)) {
1.30 markus 270: return 0;
1.25 markus 271: } else if (type != code2) {
1.24 markus 272: fatal("Bad authentication reply message type: %d", type);
1.25 markus 273: }
1.12 markus 274:
275: /* Get the number of entries in the response and check it for sanity. */
276: auth->howmany = buffer_get_int(&auth->identities);
277: if (auth->howmany > 1024)
1.37 millert 278: fatal("Too many identities in authentication reply: %d",
1.24 markus 279: auth->howmany);
1.12 markus 280:
1.30 markus 281: return auth->howmany;
282: }
283:
284: Key *
285: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
286: {
287: /* get number of identities and return the first entry (if any). */
288: if (ssh_get_num_identities(auth, version) > 0)
289: return ssh_get_next_identity(auth, comment, version);
290: return NULL;
1.1 deraadt 291: }
292:
1.25 markus 293: Key *
294: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 295: {
1.31 markus 296: u_int bits;
297: u_char *blob;
298: u_int blen;
1.25 markus 299: Key *key = NULL;
1.9 markus 300:
1.12 markus 301: /* Return failure if no more entries. */
302: if (auth->howmany <= 0)
1.25 markus 303: return NULL;
1.12 markus 304:
1.14 markus 305: /*
306: * Get the next entry from the packet. These will abort with a fatal
307: * error if the packet is too short or contains corrupt data.
308: */
1.45.2.1 jason 309: switch (version) {
1.25 markus 310: case 1:
1.30 markus 311: key = key_new(KEY_RSA1);
1.25 markus 312: bits = buffer_get_int(&auth->identities);
313: buffer_get_bignum(&auth->identities, key->rsa->e);
314: buffer_get_bignum(&auth->identities, key->rsa->n);
315: *comment = buffer_get_string(&auth->identities, NULL);
316: if (bits != BN_num_bits(key->rsa->n))
317: log("Warning: identity keysize mismatch: actual %d, announced %u",
318: BN_num_bits(key->rsa->n), bits);
319: break;
320: case 2:
321: blob = buffer_get_string(&auth->identities, &blen);
322: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 323: key = key_from_blob(blob, blen);
1.25 markus 324: xfree(blob);
325: break;
326: default:
327: return NULL;
328: break;
329: }
1.12 markus 330: /* Decrement the number of remaining entries. */
331: auth->howmany--;
1.25 markus 332: return key;
1.1 deraadt 333: }
334:
1.14 markus 335: /*
336: * Generates a random challenge, sends it to the agent, and waits for
337: * response from the agent. Returns true (non-zero) if the agent gave the
338: * correct answer, zero otherwise. Response type selects the style of
339: * response desired, with 0 corresponding to protocol version 1.0 (no longer
340: * supported) and 1 corresponding to protocol version 1.1.
341: */
1.1 deraadt 342:
1.2 provos 343: int
344: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 345: Key* key, BIGNUM *challenge,
1.31 markus 346: u_char session_id[16],
347: u_int response_type,
348: u_char response[16])
1.1 deraadt 349: {
1.12 markus 350: Buffer buffer;
1.24 markus 351: int success = 0;
352: int i;
353: int type;
1.12 markus 354:
1.30 markus 355: if (key->type != KEY_RSA1)
1.25 markus 356: return 0;
357: if (response_type == 0) {
358: log("Compatibility with ssh protocol version 1.0 no longer supported.");
359: return 0;
360: }
1.12 markus 361: buffer_init(&buffer);
1.24 markus 362: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 363: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
364: buffer_put_bignum(&buffer, key->rsa->e);
365: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 366: buffer_put_bignum(&buffer, challenge);
1.45.2.1 jason 367: buffer_append(&buffer, session_id, 16);
1.12 markus 368: buffer_put_int(&buffer, response_type);
369:
1.24 markus 370: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 371: buffer_free(&buffer);
372: return 0;
373: }
1.24 markus 374: type = buffer_get_char(&buffer);
1.12 markus 375:
1.29 markus 376: if (agent_failed(type)) {
1.12 markus 377: log("Agent admitted failure to authenticate using the key.");
1.24 markus 378: } else if (type != SSH_AGENT_RSA_RESPONSE) {
379: fatal("Bad authentication response: %d", type);
380: } else {
381: success = 1;
382: /*
383: * Get the response from the packet. This will abort with a
384: * fatal error if the packet is corrupt.
385: */
386: for (i = 0; i < 16; i++)
387: response[i] = buffer_get_char(&buffer);
1.12 markus 388: }
389: buffer_free(&buffer);
1.24 markus 390: return success;
1.12 markus 391: }
1.1 deraadt 392:
1.25 markus 393: /* ask agent to sign data, returns -1 on error, 0 on success */
394: int
395: ssh_agent_sign(AuthenticationConnection *auth,
396: Key *key,
1.45.2.1 jason 397: u_char **sigp, u_int *lenp,
398: u_char *data, u_int datalen)
1.25 markus 399: {
1.28 markus 400: extern int datafellows;
1.25 markus 401: Buffer msg;
1.31 markus 402: u_char *blob;
403: u_int blen;
1.28 markus 404: int type, flags = 0;
1.25 markus 405: int ret = -1;
406:
1.30 markus 407: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 408: return -1;
409:
1.28 markus 410: if (datafellows & SSH_BUG_SIGBLOB)
411: flags = SSH_AGENT_OLD_SIGNATURE;
412:
1.25 markus 413: buffer_init(&msg);
414: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
415: buffer_put_string(&msg, blob, blen);
416: buffer_put_string(&msg, data, datalen);
1.28 markus 417: buffer_put_int(&msg, flags);
1.25 markus 418: xfree(blob);
419:
420: if (ssh_request_reply(auth, &msg, &msg) == 0) {
421: buffer_free(&msg);
422: return -1;
423: }
424: type = buffer_get_char(&msg);
1.29 markus 425: if (agent_failed(type)) {
1.25 markus 426: log("Agent admitted failure to sign using the key.");
427: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
428: fatal("Bad authentication response: %d", type);
429: } else {
430: ret = 0;
431: *sigp = buffer_get_string(&msg, lenp);
432: }
433: buffer_free(&msg);
434: return ret;
435: }
436:
1.22 markus 437: /* Encode key for a message to the agent. */
438:
1.41 itojun 439: static void
1.30 markus 440: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 441: {
442: buffer_put_int(b, BN_num_bits(key->n));
443: buffer_put_bignum(b, key->n);
444: buffer_put_bignum(b, key->e);
445: buffer_put_bignum(b, key->d);
446: /* To keep within the protocol: p < q for ssh. in SSL p > q */
447: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
448: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
449: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 450: buffer_put_cstring(b, comment);
1.22 markus 451: }
452:
1.41 itojun 453: static void
1.30 markus 454: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 455: {
1.30 markus 456: buffer_put_cstring(b, key_ssh_name(key));
1.45.2.1 jason 457: switch (key->type) {
1.30 markus 458: case KEY_RSA:
459: buffer_put_bignum2(b, key->rsa->n);
460: buffer_put_bignum2(b, key->rsa->e);
461: buffer_put_bignum2(b, key->rsa->d);
462: buffer_put_bignum2(b, key->rsa->iqmp);
463: buffer_put_bignum2(b, key->rsa->p);
464: buffer_put_bignum2(b, key->rsa->q);
465: break;
466: case KEY_DSA:
467: buffer_put_bignum2(b, key->dsa->p);
468: buffer_put_bignum2(b, key->dsa->q);
469: buffer_put_bignum2(b, key->dsa->g);
470: buffer_put_bignum2(b, key->dsa->pub_key);
471: buffer_put_bignum2(b, key->dsa->priv_key);
472: break;
473: }
474: buffer_put_cstring(b, comment);
1.22 markus 475: }
476:
1.14 markus 477: /*
478: * Adds an identity to the authentication server. This call is not meant to
479: * be used by normal applications.
480: */
1.1 deraadt 481:
1.18 markus 482: int
1.45.2.3 miod 483: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
484: const char *comment, u_int life)
1.1 deraadt 485: {
1.25 markus 486: Buffer msg;
1.45.2.3 miod 487: int type, constrained = (life != 0);
1.12 markus 488:
1.25 markus 489: buffer_init(&msg);
1.22 markus 490:
491: switch (key->type) {
1.30 markus 492: case KEY_RSA1:
1.45.2.3 miod 493: type = constrained ?
494: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
495: SSH_AGENTC_ADD_RSA_IDENTITY;
496: buffer_put_char(&msg, type);
1.30 markus 497: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
498: break;
1.22 markus 499: case KEY_RSA:
500: case KEY_DSA:
1.45.2.3 miod 501: type = constrained ?
502: SSH2_AGENTC_ADD_ID_CONSTRAINED :
503: SSH2_AGENTC_ADD_IDENTITY;
504: buffer_put_char(&msg, type);
1.30 markus 505: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 506: break;
507: default:
1.25 markus 508: buffer_free(&msg);
1.22 markus 509: return 0;
510: break;
511: }
1.45.2.3 miod 512: if (constrained) {
513: if (life != 0) {
514: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
515: buffer_put_int(&msg, life);
516: }
517: }
1.25 markus 518: if (ssh_request_reply(auth, &msg, &msg) == 0) {
519: buffer_free(&msg);
1.12 markus 520: return 0;
521: }
1.25 markus 522: type = buffer_get_char(&msg);
523: buffer_free(&msg);
1.24 markus 524: return decode_reply(type);
1.45.2.3 miod 525: }
526:
527: int
528: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
529: {
530: return ssh_add_identity_constrained(auth, key, comment, 0);
1.12 markus 531: }
1.1 deraadt 532:
1.14 markus 533: /*
534: * Removes an identity from the authentication server. This call is not
535: * meant to be used by normal applications.
536: */
1.1 deraadt 537:
1.18 markus 538: int
1.25 markus 539: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 540: {
1.25 markus 541: Buffer msg;
1.24 markus 542: int type;
1.31 markus 543: u_char *blob;
544: u_int blen;
1.12 markus 545:
1.25 markus 546: buffer_init(&msg);
1.12 markus 547:
1.30 markus 548: if (key->type == KEY_RSA1) {
1.25 markus 549: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
550: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
551: buffer_put_bignum(&msg, key->rsa->e);
552: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 553: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
554: key_to_blob(key, &blob, &blen);
1.25 markus 555: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
556: buffer_put_string(&msg, blob, blen);
557: xfree(blob);
558: } else {
559: buffer_free(&msg);
560: return 0;
561: }
1.42 markus 562: if (ssh_request_reply(auth, &msg, &msg) == 0) {
563: buffer_free(&msg);
564: return 0;
565: }
566: type = buffer_get_char(&msg);
567: buffer_free(&msg);
568: return decode_reply(type);
569: }
570:
571: int
1.45.2.2 miod 572: ssh_update_card(AuthenticationConnection *auth, int add, const char *reader_id, const char *pin)
1.42 markus 573: {
574: Buffer msg;
575: int type;
576:
577: buffer_init(&msg);
578: buffer_put_char(&msg, add ? SSH_AGENTC_ADD_SMARTCARD_KEY :
579: SSH_AGENTC_REMOVE_SMARTCARD_KEY);
1.43 markus 580: buffer_put_cstring(&msg, reader_id);
1.45.2.2 miod 581: buffer_put_cstring(&msg, pin);
1.25 markus 582: if (ssh_request_reply(auth, &msg, &msg) == 0) {
583: buffer_free(&msg);
1.12 markus 584: return 0;
585: }
1.25 markus 586: type = buffer_get_char(&msg);
587: buffer_free(&msg);
1.24 markus 588: return decode_reply(type);
1.12 markus 589: }
590:
1.14 markus 591: /*
592: * Removes all identities from the agent. This call is not meant to be used
593: * by normal applications.
594: */
1.1 deraadt 595:
1.18 markus 596: int
1.25 markus 597: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 598: {
1.25 markus 599: Buffer msg;
1.24 markus 600: int type;
1.25 markus 601: int code = (version==1) ?
602: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
603: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 604:
1.25 markus 605: buffer_init(&msg);
606: buffer_put_char(&msg, code);
1.12 markus 607:
1.25 markus 608: if (ssh_request_reply(auth, &msg, &msg) == 0) {
609: buffer_free(&msg);
1.12 markus 610: return 0;
611: }
1.25 markus 612: type = buffer_get_char(&msg);
613: buffer_free(&msg);
1.24 markus 614: return decode_reply(type);
1.21 markus 615: }
616:
1.35 stevesk 617: int
1.24 markus 618: decode_reply(int type)
1.21 markus 619: {
1.12 markus 620: switch (type) {
621: case SSH_AGENT_FAILURE:
1.29 markus 622: case SSH_COM_AGENT2_FAILURE:
1.44 markus 623: case SSH2_AGENT_FAILURE:
1.24 markus 624: log("SSH_AGENT_FAILURE");
1.12 markus 625: return 0;
626: case SSH_AGENT_SUCCESS:
627: return 1;
628: default:
1.21 markus 629: fatal("Bad response from authentication agent: %d", type);
1.12 markus 630: }
631: /* NOTREACHED */
632: return 0;
633: }
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