Annotation of src/usr.bin/ssh/authfd.c, Revision 1.45.2.1
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"
1.45.2.1! jason 38: RCSID("$OpenBSD: authfd.c,v 1.48 2002/02/24 19:14:59 markus 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) || \
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: }
147: buffer_append(reply, (char *) buf, l);
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:
1.14 markus 210: /*
211: * Returns the first authentication identity held by the agent.
212: */
1.1 deraadt 213:
1.30 markus 214: int
215: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 216: {
1.25 markus 217: int type, code1 = 0, code2 = 0;
1.24 markus 218: Buffer request;
1.25 markus 219:
1.45.2.1! jason 220: switch (version) {
1.25 markus 221: case 1:
222: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
223: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
224: break;
225: case 2:
226: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
227: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
228: break;
229: default:
1.30 markus 230: return 0;
1.25 markus 231: }
1.1 deraadt 232:
1.14 markus 233: /*
234: * Send a message to the agent requesting for a list of the
235: * identities it can represent.
236: */
1.24 markus 237: buffer_init(&request);
1.25 markus 238: buffer_put_char(&request, code1);
1.12 markus 239:
240: buffer_clear(&auth->identities);
1.24 markus 241: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
242: buffer_free(&request);
1.30 markus 243: return 0;
1.12 markus 244: }
1.24 markus 245: buffer_free(&request);
1.1 deraadt 246:
1.12 markus 247: /* Get message type, and verify that we got a proper answer. */
1.24 markus 248: type = buffer_get_char(&auth->identities);
1.29 markus 249: if (agent_failed(type)) {
1.30 markus 250: return 0;
1.25 markus 251: } else if (type != code2) {
1.24 markus 252: fatal("Bad authentication reply message type: %d", type);
1.25 markus 253: }
1.12 markus 254:
255: /* Get the number of entries in the response and check it for sanity. */
256: auth->howmany = buffer_get_int(&auth->identities);
257: if (auth->howmany > 1024)
1.37 millert 258: fatal("Too many identities in authentication reply: %d",
1.24 markus 259: auth->howmany);
1.12 markus 260:
1.30 markus 261: return auth->howmany;
262: }
263:
264: Key *
265: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
266: {
267: /* get number of identities and return the first entry (if any). */
268: if (ssh_get_num_identities(auth, version) > 0)
269: return ssh_get_next_identity(auth, comment, version);
270: return NULL;
1.1 deraadt 271: }
272:
1.25 markus 273: Key *
274: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 275: {
1.31 markus 276: u_int bits;
277: u_char *blob;
278: u_int blen;
1.25 markus 279: Key *key = NULL;
1.9 markus 280:
1.12 markus 281: /* Return failure if no more entries. */
282: if (auth->howmany <= 0)
1.25 markus 283: return NULL;
1.12 markus 284:
1.14 markus 285: /*
286: * Get the next entry from the packet. These will abort with a fatal
287: * error if the packet is too short or contains corrupt data.
288: */
1.45.2.1! jason 289: switch (version) {
1.25 markus 290: case 1:
1.30 markus 291: key = key_new(KEY_RSA1);
1.25 markus 292: bits = buffer_get_int(&auth->identities);
293: buffer_get_bignum(&auth->identities, key->rsa->e);
294: buffer_get_bignum(&auth->identities, key->rsa->n);
295: *comment = buffer_get_string(&auth->identities, NULL);
296: if (bits != BN_num_bits(key->rsa->n))
297: log("Warning: identity keysize mismatch: actual %d, announced %u",
298: BN_num_bits(key->rsa->n), bits);
299: break;
300: case 2:
301: blob = buffer_get_string(&auth->identities, &blen);
302: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 303: key = key_from_blob(blob, blen);
1.25 markus 304: xfree(blob);
305: break;
306: default:
307: return NULL;
308: break;
309: }
1.12 markus 310: /* Decrement the number of remaining entries. */
311: auth->howmany--;
1.25 markus 312: return key;
1.1 deraadt 313: }
314:
1.14 markus 315: /*
316: * Generates a random challenge, sends it to the agent, and waits for
317: * response from the agent. Returns true (non-zero) if the agent gave the
318: * correct answer, zero otherwise. Response type selects the style of
319: * response desired, with 0 corresponding to protocol version 1.0 (no longer
320: * supported) and 1 corresponding to protocol version 1.1.
321: */
1.1 deraadt 322:
1.2 provos 323: int
324: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 325: Key* key, BIGNUM *challenge,
1.31 markus 326: u_char session_id[16],
327: u_int response_type,
328: u_char response[16])
1.1 deraadt 329: {
1.12 markus 330: Buffer buffer;
1.24 markus 331: int success = 0;
332: int i;
333: int type;
1.12 markus 334:
1.30 markus 335: if (key->type != KEY_RSA1)
1.25 markus 336: return 0;
337: if (response_type == 0) {
338: log("Compatibility with ssh protocol version 1.0 no longer supported.");
339: return 0;
340: }
1.12 markus 341: buffer_init(&buffer);
1.24 markus 342: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 343: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
344: buffer_put_bignum(&buffer, key->rsa->e);
345: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 346: buffer_put_bignum(&buffer, challenge);
1.45.2.1! jason 347: buffer_append(&buffer, session_id, 16);
1.12 markus 348: buffer_put_int(&buffer, response_type);
349:
1.24 markus 350: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 351: buffer_free(&buffer);
352: return 0;
353: }
1.24 markus 354: type = buffer_get_char(&buffer);
1.12 markus 355:
1.29 markus 356: if (agent_failed(type)) {
1.12 markus 357: log("Agent admitted failure to authenticate using the key.");
1.24 markus 358: } else if (type != SSH_AGENT_RSA_RESPONSE) {
359: fatal("Bad authentication response: %d", type);
360: } else {
361: success = 1;
362: /*
363: * Get the response from the packet. This will abort with a
364: * fatal error if the packet is corrupt.
365: */
366: for (i = 0; i < 16; i++)
367: response[i] = buffer_get_char(&buffer);
1.12 markus 368: }
369: buffer_free(&buffer);
1.24 markus 370: return success;
1.12 markus 371: }
1.1 deraadt 372:
1.25 markus 373: /* ask agent to sign data, returns -1 on error, 0 on success */
374: int
375: ssh_agent_sign(AuthenticationConnection *auth,
376: Key *key,
1.45.2.1! jason 377: u_char **sigp, u_int *lenp,
! 378: u_char *data, u_int datalen)
1.25 markus 379: {
1.28 markus 380: extern int datafellows;
1.25 markus 381: Buffer msg;
1.31 markus 382: u_char *blob;
383: u_int blen;
1.28 markus 384: int type, flags = 0;
1.25 markus 385: int ret = -1;
386:
1.30 markus 387: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 388: return -1;
389:
1.28 markus 390: if (datafellows & SSH_BUG_SIGBLOB)
391: flags = SSH_AGENT_OLD_SIGNATURE;
392:
1.25 markus 393: buffer_init(&msg);
394: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
395: buffer_put_string(&msg, blob, blen);
396: buffer_put_string(&msg, data, datalen);
1.28 markus 397: buffer_put_int(&msg, flags);
1.25 markus 398: xfree(blob);
399:
400: if (ssh_request_reply(auth, &msg, &msg) == 0) {
401: buffer_free(&msg);
402: return -1;
403: }
404: type = buffer_get_char(&msg);
1.29 markus 405: if (agent_failed(type)) {
1.25 markus 406: log("Agent admitted failure to sign using the key.");
407: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
408: fatal("Bad authentication response: %d", type);
409: } else {
410: ret = 0;
411: *sigp = buffer_get_string(&msg, lenp);
412: }
413: buffer_free(&msg);
414: return ret;
415: }
416:
1.22 markus 417: /* Encode key for a message to the agent. */
418:
1.41 itojun 419: static void
1.30 markus 420: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 421: {
422: buffer_clear(b);
423: buffer_put_char(b, SSH_AGENTC_ADD_RSA_IDENTITY);
424: buffer_put_int(b, BN_num_bits(key->n));
425: buffer_put_bignum(b, key->n);
426: buffer_put_bignum(b, key->e);
427: buffer_put_bignum(b, key->d);
428: /* To keep within the protocol: p < q for ssh. in SSL p > q */
429: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
430: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
431: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 432: buffer_put_cstring(b, comment);
1.22 markus 433: }
434:
1.41 itojun 435: static void
1.30 markus 436: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 437: {
438: buffer_clear(b);
439: buffer_put_char(b, SSH2_AGENTC_ADD_IDENTITY);
1.30 markus 440: buffer_put_cstring(b, key_ssh_name(key));
1.45.2.1! jason 441: switch (key->type) {
1.30 markus 442: case KEY_RSA:
443: buffer_put_bignum2(b, key->rsa->n);
444: buffer_put_bignum2(b, key->rsa->e);
445: buffer_put_bignum2(b, key->rsa->d);
446: buffer_put_bignum2(b, key->rsa->iqmp);
447: buffer_put_bignum2(b, key->rsa->p);
448: buffer_put_bignum2(b, key->rsa->q);
449: break;
450: case KEY_DSA:
451: buffer_put_bignum2(b, key->dsa->p);
452: buffer_put_bignum2(b, key->dsa->q);
453: buffer_put_bignum2(b, key->dsa->g);
454: buffer_put_bignum2(b, key->dsa->pub_key);
455: buffer_put_bignum2(b, key->dsa->priv_key);
456: break;
457: }
458: buffer_put_cstring(b, comment);
1.22 markus 459: }
460:
1.14 markus 461: /*
462: * Adds an identity to the authentication server. This call is not meant to
463: * be used by normal applications.
464: */
1.1 deraadt 465:
1.18 markus 466: int
1.22 markus 467: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
1.1 deraadt 468: {
1.25 markus 469: Buffer msg;
1.24 markus 470: int type;
1.12 markus 471:
1.25 markus 472: buffer_init(&msg);
1.22 markus 473:
474: switch (key->type) {
1.30 markus 475: case KEY_RSA1:
476: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
477: break;
1.22 markus 478: case KEY_RSA:
479: case KEY_DSA:
1.30 markus 480: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 481: break;
482: default:
1.25 markus 483: buffer_free(&msg);
1.22 markus 484: return 0;
485: break;
486: }
1.25 markus 487: if (ssh_request_reply(auth, &msg, &msg) == 0) {
488: buffer_free(&msg);
1.12 markus 489: return 0;
490: }
1.25 markus 491: type = buffer_get_char(&msg);
492: buffer_free(&msg);
1.24 markus 493: return decode_reply(type);
1.12 markus 494: }
1.1 deraadt 495:
1.14 markus 496: /*
497: * Removes an identity from the authentication server. This call is not
498: * meant to be used by normal applications.
499: */
1.1 deraadt 500:
1.18 markus 501: int
1.25 markus 502: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 503: {
1.25 markus 504: Buffer msg;
1.24 markus 505: int type;
1.31 markus 506: u_char *blob;
507: u_int blen;
1.12 markus 508:
1.25 markus 509: buffer_init(&msg);
1.12 markus 510:
1.30 markus 511: if (key->type == KEY_RSA1) {
1.25 markus 512: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
513: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
514: buffer_put_bignum(&msg, key->rsa->e);
515: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 516: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
517: key_to_blob(key, &blob, &blen);
1.25 markus 518: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
519: buffer_put_string(&msg, blob, blen);
520: xfree(blob);
521: } else {
522: buffer_free(&msg);
523: return 0;
524: }
1.42 markus 525: if (ssh_request_reply(auth, &msg, &msg) == 0) {
526: buffer_free(&msg);
527: return 0;
528: }
529: type = buffer_get_char(&msg);
530: buffer_free(&msg);
531: return decode_reply(type);
532: }
533:
534: int
1.43 markus 535: ssh_update_card(AuthenticationConnection *auth, int add, const char *reader_id)
1.42 markus 536: {
537: Buffer msg;
538: int type;
539:
540: buffer_init(&msg);
541: buffer_put_char(&msg, add ? SSH_AGENTC_ADD_SMARTCARD_KEY :
542: SSH_AGENTC_REMOVE_SMARTCARD_KEY);
1.43 markus 543: buffer_put_cstring(&msg, reader_id);
1.25 markus 544: if (ssh_request_reply(auth, &msg, &msg) == 0) {
545: buffer_free(&msg);
1.12 markus 546: return 0;
547: }
1.25 markus 548: type = buffer_get_char(&msg);
549: buffer_free(&msg);
1.24 markus 550: return decode_reply(type);
1.12 markus 551: }
552:
1.14 markus 553: /*
554: * Removes all identities from the agent. This call is not meant to be used
555: * by normal applications.
556: */
1.1 deraadt 557:
1.18 markus 558: int
1.25 markus 559: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 560: {
1.25 markus 561: Buffer msg;
1.24 markus 562: int type;
1.25 markus 563: int code = (version==1) ?
564: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
565: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 566:
1.25 markus 567: buffer_init(&msg);
568: buffer_put_char(&msg, code);
1.12 markus 569:
1.25 markus 570: if (ssh_request_reply(auth, &msg, &msg) == 0) {
571: buffer_free(&msg);
1.12 markus 572: return 0;
573: }
1.25 markus 574: type = buffer_get_char(&msg);
575: buffer_free(&msg);
1.24 markus 576: return decode_reply(type);
1.21 markus 577: }
578:
1.35 stevesk 579: int
1.24 markus 580: decode_reply(int type)
1.21 markus 581: {
1.12 markus 582: switch (type) {
583: case SSH_AGENT_FAILURE:
1.29 markus 584: case SSH_COM_AGENT2_FAILURE:
1.44 markus 585: case SSH2_AGENT_FAILURE:
1.24 markus 586: log("SSH_AGENT_FAILURE");
1.12 markus 587: return 0;
588: case SSH_AGENT_SUCCESS:
589: return 1;
590: default:
1.21 markus 591: fatal("Bad response from authentication agent: %d", type);
1.12 markus 592: }
593: /* NOTREACHED */
594: return 0;
595: }
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