Annotation of src/usr.bin/ssh/authfd.c, Revision 1.44
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"
1.44 ! markus 38: RCSID("$OpenBSD: authfd.c,v 1.43 2001/08/01 22:03:33 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;
1.23 deraadt 70: int sock, len;
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));
1.36 deraadt 79: len = SUN_LEN(&sunaddr)+1;
80: sunaddr.sun_len = len;
1.12 markus 81:
82: sock = socket(AF_UNIX, SOCK_STREAM, 0);
83: if (sock < 0)
84: return -1;
85:
86: /* close on exec */
87: if (fcntl(sock, F_SETFD, 1) == -1) {
88: close(sock);
89: return -1;
90: }
1.23 deraadt 91: if (connect(sock, (struct sockaddr *) & sunaddr, len) < 0) {
1.12 markus 92: close(sock);
93: return -1;
94: }
95: return sock;
1.1 deraadt 96: }
97:
1.41 itojun 98: static int
1.25 markus 99: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 100: {
101: int l, len;
102: char buf[1024];
103:
104: /* Get the length of the message, and format it in the buffer. */
105: len = buffer_len(request);
106: PUT_32BIT(buf, len);
107:
108: /* Send the length and then the packet to the agent. */
109: if (atomicio(write, auth->fd, buf, 4) != 4 ||
110: atomicio(write, auth->fd, buffer_ptr(request),
111: buffer_len(request)) != buffer_len(request)) {
112: error("Error writing to authentication socket.");
113: return 0;
114: }
115: /*
116: * Wait for response from the agent. First read the length of the
117: * response packet.
118: */
119: len = 4;
120: while (len > 0) {
121: l = read(auth->fd, buf + 4 - len, len);
1.38 deraadt 122: if (l == -1 && (errno == EAGAIN || errno == EINTR))
1.39 markus 123: continue;
1.24 markus 124: if (l <= 0) {
125: error("Error reading response length from authentication socket.");
126: return 0;
127: }
128: len -= l;
129: }
130:
131: /* Extract the length, and check it for sanity. */
132: len = GET_32BIT(buf);
133: if (len > 256 * 1024)
134: fatal("Authentication response too long: %d", len);
135:
136: /* Read the rest of the response in to the buffer. */
137: buffer_clear(reply);
138: while (len > 0) {
139: l = len;
140: if (l > sizeof(buf))
141: l = sizeof(buf);
142: l = read(auth->fd, buf, l);
1.38 deraadt 143: if (l == -1 && (errno == EAGAIN || errno == EINTR))
1.39 markus 144: continue;
1.24 markus 145: if (l <= 0) {
146: error("Error reading response from authentication socket.");
147: return 0;
148: }
149: buffer_append(reply, (char *) buf, l);
150: len -= l;
151: }
152: return 1;
153: }
154:
1.14 markus 155: /*
156: * Closes the agent socket if it should be closed (depends on how it was
157: * obtained). The argument must have been returned by
158: * ssh_get_authentication_socket().
159: */
1.1 deraadt 160:
1.18 markus 161: void
1.12 markus 162: ssh_close_authentication_socket(int sock)
1.1 deraadt 163: {
1.12 markus 164: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
165: close(sock);
1.1 deraadt 166: }
167:
1.14 markus 168: /*
169: * Opens and connects a private socket for communication with the
170: * authentication agent. Returns the file descriptor (which must be
171: * shut down and closed by the caller when no longer needed).
172: * Returns NULL if an error occurred and the connection could not be
173: * opened.
174: */
1.1 deraadt 175:
1.12 markus 176: AuthenticationConnection *
1.32 markus 177: ssh_get_authentication_connection(void)
1.1 deraadt 178: {
1.12 markus 179: AuthenticationConnection *auth;
180: int sock;
1.1 deraadt 181:
1.12 markus 182: sock = ssh_get_authentication_socket();
183:
1.14 markus 184: /*
185: * Fail if we couldn't obtain a connection. This happens if we
186: * exited due to a timeout.
187: */
1.12 markus 188: if (sock < 0)
189: return NULL;
190:
191: auth = xmalloc(sizeof(*auth));
192: auth->fd = sock;
193: buffer_init(&auth->identities);
194: auth->howmany = 0;
195:
196: return auth;
1.1 deraadt 197: }
198:
1.14 markus 199: /*
200: * Closes the connection to the authentication agent and frees any associated
201: * memory.
202: */
1.1 deraadt 203:
1.18 markus 204: void
1.25 markus 205: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 206: {
1.25 markus 207: buffer_free(&auth->identities);
208: close(auth->fd);
209: xfree(auth);
1.1 deraadt 210: }
211:
1.14 markus 212: /*
213: * Returns the first authentication identity held by the agent.
214: */
1.1 deraadt 215:
1.30 markus 216: int
217: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 218: {
1.25 markus 219: int type, code1 = 0, code2 = 0;
1.24 markus 220: Buffer request;
1.25 markus 221:
222: switch(version){
223: case 1:
224: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
225: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
226: break;
227: case 2:
228: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
229: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
230: break;
231: default:
1.30 markus 232: return 0;
1.25 markus 233: }
1.1 deraadt 234:
1.14 markus 235: /*
236: * Send a message to the agent requesting for a list of the
237: * identities it can represent.
238: */
1.24 markus 239: buffer_init(&request);
1.25 markus 240: buffer_put_char(&request, code1);
1.12 markus 241:
242: buffer_clear(&auth->identities);
1.24 markus 243: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
244: buffer_free(&request);
1.30 markus 245: return 0;
1.12 markus 246: }
1.24 markus 247: buffer_free(&request);
1.1 deraadt 248:
1.12 markus 249: /* Get message type, and verify that we got a proper answer. */
1.24 markus 250: type = buffer_get_char(&auth->identities);
1.29 markus 251: if (agent_failed(type)) {
1.30 markus 252: return 0;
1.25 markus 253: } else if (type != code2) {
1.24 markus 254: fatal("Bad authentication reply message type: %d", type);
1.25 markus 255: }
1.12 markus 256:
257: /* Get the number of entries in the response and check it for sanity. */
258: auth->howmany = buffer_get_int(&auth->identities);
259: if (auth->howmany > 1024)
1.37 millert 260: fatal("Too many identities in authentication reply: %d",
1.24 markus 261: auth->howmany);
1.12 markus 262:
1.30 markus 263: return auth->howmany;
264: }
265:
266: Key *
267: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
268: {
269: /* get number of identities and return the first entry (if any). */
270: if (ssh_get_num_identities(auth, version) > 0)
271: return ssh_get_next_identity(auth, comment, version);
272: return NULL;
1.1 deraadt 273: }
274:
1.25 markus 275: Key *
276: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 277: {
1.31 markus 278: u_int bits;
279: u_char *blob;
280: u_int blen;
1.25 markus 281: Key *key = NULL;
1.9 markus 282:
1.12 markus 283: /* Return failure if no more entries. */
284: if (auth->howmany <= 0)
1.25 markus 285: return NULL;
1.12 markus 286:
1.14 markus 287: /*
288: * Get the next entry from the packet. These will abort with a fatal
289: * error if the packet is too short or contains corrupt data.
290: */
1.25 markus 291: switch(version){
292: case 1:
1.30 markus 293: key = key_new(KEY_RSA1);
1.25 markus 294: bits = buffer_get_int(&auth->identities);
295: buffer_get_bignum(&auth->identities, key->rsa->e);
296: buffer_get_bignum(&auth->identities, key->rsa->n);
297: *comment = buffer_get_string(&auth->identities, NULL);
298: if (bits != BN_num_bits(key->rsa->n))
299: log("Warning: identity keysize mismatch: actual %d, announced %u",
300: BN_num_bits(key->rsa->n), bits);
301: break;
302: case 2:
303: blob = buffer_get_string(&auth->identities, &blen);
304: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 305: key = key_from_blob(blob, blen);
1.25 markus 306: xfree(blob);
307: break;
308: default:
309: return NULL;
310: break;
311: }
1.12 markus 312: /* Decrement the number of remaining entries. */
313: auth->howmany--;
1.25 markus 314: return key;
1.1 deraadt 315: }
316:
1.14 markus 317: /*
318: * Generates a random challenge, sends it to the agent, and waits for
319: * response from the agent. Returns true (non-zero) if the agent gave the
320: * correct answer, zero otherwise. Response type selects the style of
321: * response desired, with 0 corresponding to protocol version 1.0 (no longer
322: * supported) and 1 corresponding to protocol version 1.1.
323: */
1.1 deraadt 324:
1.2 provos 325: int
326: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 327: Key* key, BIGNUM *challenge,
1.31 markus 328: u_char session_id[16],
329: u_int response_type,
330: u_char response[16])
1.1 deraadt 331: {
1.12 markus 332: Buffer buffer;
1.24 markus 333: int success = 0;
334: int i;
335: int type;
1.12 markus 336:
1.30 markus 337: if (key->type != KEY_RSA1)
1.25 markus 338: return 0;
339: if (response_type == 0) {
340: log("Compatibility with ssh protocol version 1.0 no longer supported.");
341: return 0;
342: }
1.12 markus 343: buffer_init(&buffer);
1.24 markus 344: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 345: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
346: buffer_put_bignum(&buffer, key->rsa->e);
347: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 348: buffer_put_bignum(&buffer, challenge);
349: buffer_append(&buffer, (char *) session_id, 16);
350: buffer_put_int(&buffer, response_type);
351:
1.24 markus 352: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 353: buffer_free(&buffer);
354: return 0;
355: }
1.24 markus 356: type = buffer_get_char(&buffer);
1.12 markus 357:
1.29 markus 358: if (agent_failed(type)) {
1.12 markus 359: log("Agent admitted failure to authenticate using the key.");
1.24 markus 360: } else if (type != SSH_AGENT_RSA_RESPONSE) {
361: fatal("Bad authentication response: %d", type);
362: } else {
363: success = 1;
364: /*
365: * Get the response from the packet. This will abort with a
366: * fatal error if the packet is corrupt.
367: */
368: for (i = 0; i < 16; i++)
369: response[i] = buffer_get_char(&buffer);
1.12 markus 370: }
371: buffer_free(&buffer);
1.24 markus 372: return success;
1.12 markus 373: }
1.1 deraadt 374:
1.25 markus 375: /* ask agent to sign data, returns -1 on error, 0 on success */
376: int
377: ssh_agent_sign(AuthenticationConnection *auth,
378: Key *key,
1.31 markus 379: u_char **sigp, int *lenp,
380: u_char *data, int datalen)
1.25 markus 381: {
1.28 markus 382: extern int datafellows;
1.25 markus 383: Buffer msg;
1.31 markus 384: u_char *blob;
385: u_int blen;
1.28 markus 386: int type, flags = 0;
1.25 markus 387: int ret = -1;
388:
1.30 markus 389: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 390: return -1;
391:
1.28 markus 392: if (datafellows & SSH_BUG_SIGBLOB)
393: flags = SSH_AGENT_OLD_SIGNATURE;
394:
1.25 markus 395: buffer_init(&msg);
396: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
397: buffer_put_string(&msg, blob, blen);
398: buffer_put_string(&msg, data, datalen);
1.28 markus 399: buffer_put_int(&msg, flags);
1.25 markus 400: xfree(blob);
401:
402: if (ssh_request_reply(auth, &msg, &msg) == 0) {
403: buffer_free(&msg);
404: return -1;
405: }
406: type = buffer_get_char(&msg);
1.29 markus 407: if (agent_failed(type)) {
1.25 markus 408: log("Agent admitted failure to sign using the key.");
409: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
410: fatal("Bad authentication response: %d", type);
411: } else {
412: ret = 0;
413: *sigp = buffer_get_string(&msg, lenp);
414: }
415: buffer_free(&msg);
416: return ret;
417: }
418:
1.22 markus 419: /* Encode key for a message to the agent. */
420:
1.41 itojun 421: static void
1.30 markus 422: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 423: {
424: buffer_clear(b);
425: buffer_put_char(b, SSH_AGENTC_ADD_RSA_IDENTITY);
426: buffer_put_int(b, BN_num_bits(key->n));
427: buffer_put_bignum(b, key->n);
428: buffer_put_bignum(b, key->e);
429: buffer_put_bignum(b, key->d);
430: /* To keep within the protocol: p < q for ssh. in SSL p > q */
431: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
432: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
433: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 434: buffer_put_cstring(b, comment);
1.22 markus 435: }
436:
1.41 itojun 437: static void
1.30 markus 438: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 439: {
440: buffer_clear(b);
441: buffer_put_char(b, SSH2_AGENTC_ADD_IDENTITY);
1.30 markus 442: buffer_put_cstring(b, key_ssh_name(key));
443: switch(key->type){
444: case KEY_RSA:
445: buffer_put_bignum2(b, key->rsa->n);
446: buffer_put_bignum2(b, key->rsa->e);
447: buffer_put_bignum2(b, key->rsa->d);
448: buffer_put_bignum2(b, key->rsa->iqmp);
449: buffer_put_bignum2(b, key->rsa->p);
450: buffer_put_bignum2(b, key->rsa->q);
451: break;
452: case KEY_DSA:
453: buffer_put_bignum2(b, key->dsa->p);
454: buffer_put_bignum2(b, key->dsa->q);
455: buffer_put_bignum2(b, key->dsa->g);
456: buffer_put_bignum2(b, key->dsa->pub_key);
457: buffer_put_bignum2(b, key->dsa->priv_key);
458: break;
459: }
460: buffer_put_cstring(b, comment);
1.22 markus 461: }
462:
1.14 markus 463: /*
464: * Adds an identity to the authentication server. This call is not meant to
465: * be used by normal applications.
466: */
1.1 deraadt 467:
1.18 markus 468: int
1.22 markus 469: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
1.1 deraadt 470: {
1.25 markus 471: Buffer msg;
1.24 markus 472: int type;
1.12 markus 473:
1.25 markus 474: buffer_init(&msg);
1.22 markus 475:
476: switch (key->type) {
1.30 markus 477: case KEY_RSA1:
478: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
479: break;
1.22 markus 480: case KEY_RSA:
481: case KEY_DSA:
1.30 markus 482: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 483: break;
484: default:
1.25 markus 485: buffer_free(&msg);
1.22 markus 486: return 0;
487: break;
488: }
1.25 markus 489: if (ssh_request_reply(auth, &msg, &msg) == 0) {
490: buffer_free(&msg);
1.12 markus 491: return 0;
492: }
1.25 markus 493: type = buffer_get_char(&msg);
494: buffer_free(&msg);
1.24 markus 495: return decode_reply(type);
1.12 markus 496: }
1.1 deraadt 497:
1.14 markus 498: /*
499: * Removes an identity from the authentication server. This call is not
500: * meant to be used by normal applications.
501: */
1.1 deraadt 502:
1.18 markus 503: int
1.25 markus 504: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 505: {
1.25 markus 506: Buffer msg;
1.24 markus 507: int type;
1.31 markus 508: u_char *blob;
509: u_int blen;
1.12 markus 510:
1.25 markus 511: buffer_init(&msg);
1.12 markus 512:
1.30 markus 513: if (key->type == KEY_RSA1) {
1.25 markus 514: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
515: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
516: buffer_put_bignum(&msg, key->rsa->e);
517: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 518: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
519: key_to_blob(key, &blob, &blen);
1.25 markus 520: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
521: buffer_put_string(&msg, blob, blen);
522: xfree(blob);
523: } else {
524: buffer_free(&msg);
525: return 0;
526: }
1.42 markus 527: if (ssh_request_reply(auth, &msg, &msg) == 0) {
528: buffer_free(&msg);
529: return 0;
530: }
531: type = buffer_get_char(&msg);
532: buffer_free(&msg);
533: return decode_reply(type);
534: }
535:
536: int
1.43 markus 537: ssh_update_card(AuthenticationConnection *auth, int add, const char *reader_id)
1.42 markus 538: {
539: Buffer msg;
540: int type;
541:
542: buffer_init(&msg);
543: buffer_put_char(&msg, add ? SSH_AGENTC_ADD_SMARTCARD_KEY :
544: SSH_AGENTC_REMOVE_SMARTCARD_KEY);
1.43 markus 545: buffer_put_cstring(&msg, reader_id);
1.25 markus 546: if (ssh_request_reply(auth, &msg, &msg) == 0) {
547: buffer_free(&msg);
1.12 markus 548: return 0;
549: }
1.25 markus 550: type = buffer_get_char(&msg);
551: buffer_free(&msg);
1.24 markus 552: return decode_reply(type);
1.12 markus 553: }
554:
1.14 markus 555: /*
556: * Removes all identities from the agent. This call is not meant to be used
557: * by normal applications.
558: */
1.1 deraadt 559:
1.18 markus 560: int
1.25 markus 561: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 562: {
1.25 markus 563: Buffer msg;
1.24 markus 564: int type;
1.25 markus 565: int code = (version==1) ?
566: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
567: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 568:
1.25 markus 569: buffer_init(&msg);
570: buffer_put_char(&msg, code);
1.12 markus 571:
1.25 markus 572: if (ssh_request_reply(auth, &msg, &msg) == 0) {
573: buffer_free(&msg);
1.12 markus 574: return 0;
575: }
1.25 markus 576: type = buffer_get_char(&msg);
577: buffer_free(&msg);
1.24 markus 578: return decode_reply(type);
1.21 markus 579: }
580:
1.35 stevesk 581: int
1.24 markus 582: decode_reply(int type)
1.21 markus 583: {
1.12 markus 584: switch (type) {
585: case SSH_AGENT_FAILURE:
1.29 markus 586: case SSH_COM_AGENT2_FAILURE:
1.44 ! markus 587: case SSH2_AGENT_FAILURE:
1.24 markus 588: log("SSH_AGENT_FAILURE");
1.12 markus 589: return 0;
590: case SSH_AGENT_SUCCESS:
591: return 1;
592: default:
1.21 markus 593: fatal("Bad response from authentication agent: %d", type);
1.12 markus 594: }
595: /* NOTREACHED */
596: return 0;
597: }
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