Annotation of src/usr.bin/ssh/authfd.c, Revision 1.59
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"
1.59 ! itojun 38: RCSID("$OpenBSD: authfd.c,v 1.58 2003/01/23 13:50:27 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:
1.57 stevesk 56: static int agent_present = 0;
57:
1.21 markus 58: /* helper */
1.24 markus 59: int decode_reply(int type);
1.21 markus 60:
1.29 markus 61: /* macro to check for "agent failure" message */
62: #define agent_failed(x) \
1.44 markus 63: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 64: (x == SSH2_AGENT_FAILURE))
1.29 markus 65:
1.57 stevesk 66: int
67: ssh_agent_present(void)
68: {
69: int authfd;
70:
71: if (agent_present)
72: return 1;
73: if ((authfd = ssh_get_authentication_socket()) == -1)
74: return 0;
75: else {
76: ssh_close_authentication_socket(authfd);
77: return 1;
78: }
79: }
80:
1.1 deraadt 81: /* Returns the number of the authentication fd, or -1 if there is none. */
82:
1.2 provos 83: int
1.32 markus 84: ssh_get_authentication_socket(void)
1.1 deraadt 85: {
1.12 markus 86: const char *authsocket;
1.45 stevesk 87: int sock;
1.12 markus 88: struct sockaddr_un sunaddr;
89:
90: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
91: if (!authsocket)
92: return -1;
93:
94: sunaddr.sun_family = AF_UNIX;
95: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
96:
97: sock = socket(AF_UNIX, SOCK_STREAM, 0);
98: if (sock < 0)
99: return -1;
100:
101: /* close on exec */
102: if (fcntl(sock, F_SETFD, 1) == -1) {
103: close(sock);
104: return -1;
105: }
1.45 stevesk 106: if (connect(sock, (struct sockaddr *) &sunaddr, sizeof sunaddr) < 0) {
1.12 markus 107: close(sock);
108: return -1;
109: }
1.57 stevesk 110: agent_present = 1;
1.12 markus 111: return sock;
1.1 deraadt 112: }
113:
1.41 itojun 114: static int
1.25 markus 115: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 116: {
117: int l, len;
118: char buf[1024];
119:
120: /* Get the length of the message, and format it in the buffer. */
121: len = buffer_len(request);
122: PUT_32BIT(buf, len);
123:
124: /* Send the length and then the packet to the agent. */
125: if (atomicio(write, auth->fd, buf, 4) != 4 ||
126: atomicio(write, auth->fd, buffer_ptr(request),
127: buffer_len(request)) != buffer_len(request)) {
128: error("Error writing to authentication socket.");
129: return 0;
130: }
131: /*
132: * Wait for response from the agent. First read the length of the
133: * response packet.
134: */
135: len = 4;
136: while (len > 0) {
137: l = read(auth->fd, buf + 4 - len, len);
1.38 deraadt 138: if (l == -1 && (errno == EAGAIN || errno == EINTR))
1.39 markus 139: continue;
1.24 markus 140: if (l <= 0) {
141: error("Error reading response length from authentication socket.");
142: return 0;
143: }
144: len -= l;
145: }
146:
147: /* Extract the length, and check it for sanity. */
148: len = GET_32BIT(buf);
149: if (len > 256 * 1024)
150: fatal("Authentication response too long: %d", len);
151:
152: /* Read the rest of the response in to the buffer. */
153: buffer_clear(reply);
154: while (len > 0) {
155: l = len;
156: if (l > sizeof(buf))
157: l = sizeof(buf);
158: l = read(auth->fd, buf, l);
1.38 deraadt 159: if (l == -1 && (errno == EAGAIN || errno == EINTR))
1.39 markus 160: continue;
1.24 markus 161: if (l <= 0) {
162: error("Error reading response from authentication socket.");
163: return 0;
164: }
1.56 markus 165: buffer_append(reply, buf, l);
1.24 markus 166: len -= l;
167: }
168: return 1;
169: }
170:
1.14 markus 171: /*
172: * Closes the agent socket if it should be closed (depends on how it was
173: * obtained). The argument must have been returned by
174: * ssh_get_authentication_socket().
175: */
1.1 deraadt 176:
1.18 markus 177: void
1.12 markus 178: ssh_close_authentication_socket(int sock)
1.1 deraadt 179: {
1.12 markus 180: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
181: close(sock);
1.1 deraadt 182: }
183:
1.14 markus 184: /*
185: * Opens and connects a private socket for communication with the
186: * authentication agent. Returns the file descriptor (which must be
187: * shut down and closed by the caller when no longer needed).
188: * Returns NULL if an error occurred and the connection could not be
189: * opened.
190: */
1.1 deraadt 191:
1.12 markus 192: AuthenticationConnection *
1.32 markus 193: ssh_get_authentication_connection(void)
1.1 deraadt 194: {
1.12 markus 195: AuthenticationConnection *auth;
196: int sock;
1.1 deraadt 197:
1.12 markus 198: sock = ssh_get_authentication_socket();
199:
1.14 markus 200: /*
201: * Fail if we couldn't obtain a connection. This happens if we
202: * exited due to a timeout.
203: */
1.12 markus 204: if (sock < 0)
205: return NULL;
206:
207: auth = xmalloc(sizeof(*auth));
208: auth->fd = sock;
209: buffer_init(&auth->identities);
210: auth->howmany = 0;
211:
212: return auth;
1.1 deraadt 213: }
214:
1.14 markus 215: /*
216: * Closes the connection to the authentication agent and frees any associated
217: * memory.
218: */
1.1 deraadt 219:
1.18 markus 220: void
1.25 markus 221: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 222: {
1.25 markus 223: buffer_free(&auth->identities);
224: close(auth->fd);
225: xfree(auth);
1.50 markus 226: }
227:
228: /* Lock/unlock agent */
229: int
230: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
231: {
232: int type;
233: Buffer msg;
234:
235: buffer_init(&msg);
236: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
237: buffer_put_cstring(&msg, password);
238:
239: if (ssh_request_reply(auth, &msg, &msg) == 0) {
240: buffer_free(&msg);
241: return 0;
242: }
243: type = buffer_get_char(&msg);
244: buffer_free(&msg);
245: return decode_reply(type);
1.1 deraadt 246: }
247:
1.14 markus 248: /*
249: * Returns the first authentication identity held by the agent.
250: */
1.1 deraadt 251:
1.30 markus 252: int
253: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 254: {
1.25 markus 255: int type, code1 = 0, code2 = 0;
1.24 markus 256: Buffer request;
1.25 markus 257:
1.46 deraadt 258: switch (version) {
1.25 markus 259: case 1:
260: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
261: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
262: break;
263: case 2:
264: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
265: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
266: break;
267: default:
1.30 markus 268: return 0;
1.25 markus 269: }
1.1 deraadt 270:
1.14 markus 271: /*
272: * Send a message to the agent requesting for a list of the
273: * identities it can represent.
274: */
1.24 markus 275: buffer_init(&request);
1.25 markus 276: buffer_put_char(&request, code1);
1.12 markus 277:
278: buffer_clear(&auth->identities);
1.24 markus 279: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
280: buffer_free(&request);
1.30 markus 281: return 0;
1.12 markus 282: }
1.24 markus 283: buffer_free(&request);
1.1 deraadt 284:
1.12 markus 285: /* Get message type, and verify that we got a proper answer. */
1.24 markus 286: type = buffer_get_char(&auth->identities);
1.29 markus 287: if (agent_failed(type)) {
1.30 markus 288: return 0;
1.25 markus 289: } else if (type != code2) {
1.24 markus 290: fatal("Bad authentication reply message type: %d", type);
1.25 markus 291: }
1.12 markus 292:
293: /* Get the number of entries in the response and check it for sanity. */
294: auth->howmany = buffer_get_int(&auth->identities);
295: if (auth->howmany > 1024)
1.37 millert 296: fatal("Too many identities in authentication reply: %d",
1.24 markus 297: auth->howmany);
1.12 markus 298:
1.30 markus 299: return auth->howmany;
300: }
301:
302: Key *
303: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
304: {
305: /* get number of identities and return the first entry (if any). */
306: if (ssh_get_num_identities(auth, version) > 0)
307: return ssh_get_next_identity(auth, comment, version);
308: return NULL;
1.1 deraadt 309: }
310:
1.25 markus 311: Key *
312: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 313: {
1.31 markus 314: u_int bits;
315: u_char *blob;
316: u_int blen;
1.25 markus 317: Key *key = NULL;
1.9 markus 318:
1.12 markus 319: /* Return failure if no more entries. */
320: if (auth->howmany <= 0)
1.25 markus 321: return NULL;
1.12 markus 322:
1.14 markus 323: /*
324: * Get the next entry from the packet. These will abort with a fatal
325: * error if the packet is too short or contains corrupt data.
326: */
1.46 deraadt 327: switch (version) {
1.25 markus 328: case 1:
1.30 markus 329: key = key_new(KEY_RSA1);
1.25 markus 330: bits = buffer_get_int(&auth->identities);
331: buffer_get_bignum(&auth->identities, key->rsa->e);
332: buffer_get_bignum(&auth->identities, key->rsa->n);
333: *comment = buffer_get_string(&auth->identities, NULL);
334: if (bits != BN_num_bits(key->rsa->n))
1.59 ! itojun 335: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 336: BN_num_bits(key->rsa->n), bits);
337: break;
338: case 2:
339: blob = buffer_get_string(&auth->identities, &blen);
340: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 341: key = key_from_blob(blob, blen);
1.25 markus 342: xfree(blob);
343: break;
344: default:
345: return NULL;
346: break;
347: }
1.12 markus 348: /* Decrement the number of remaining entries. */
349: auth->howmany--;
1.25 markus 350: return key;
1.1 deraadt 351: }
352:
1.14 markus 353: /*
354: * Generates a random challenge, sends it to the agent, and waits for
355: * response from the agent. Returns true (non-zero) if the agent gave the
356: * correct answer, zero otherwise. Response type selects the style of
357: * response desired, with 0 corresponding to protocol version 1.0 (no longer
358: * supported) and 1 corresponding to protocol version 1.1.
359: */
1.1 deraadt 360:
1.2 provos 361: int
362: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 363: Key* key, BIGNUM *challenge,
1.31 markus 364: u_char session_id[16],
365: u_int response_type,
366: u_char response[16])
1.1 deraadt 367: {
1.12 markus 368: Buffer buffer;
1.24 markus 369: int success = 0;
370: int i;
371: int type;
1.12 markus 372:
1.30 markus 373: if (key->type != KEY_RSA1)
1.25 markus 374: return 0;
375: if (response_type == 0) {
1.59 ! itojun 376: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 377: return 0;
378: }
1.12 markus 379: buffer_init(&buffer);
1.24 markus 380: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 381: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
382: buffer_put_bignum(&buffer, key->rsa->e);
383: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 384: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 385: buffer_append(&buffer, session_id, 16);
1.12 markus 386: buffer_put_int(&buffer, response_type);
387:
1.24 markus 388: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 389: buffer_free(&buffer);
390: return 0;
391: }
1.24 markus 392: type = buffer_get_char(&buffer);
1.12 markus 393:
1.29 markus 394: if (agent_failed(type)) {
1.59 ! itojun 395: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 396: } else if (type != SSH_AGENT_RSA_RESPONSE) {
397: fatal("Bad authentication response: %d", type);
398: } else {
399: success = 1;
400: /*
401: * Get the response from the packet. This will abort with a
402: * fatal error if the packet is corrupt.
403: */
404: for (i = 0; i < 16; i++)
405: response[i] = buffer_get_char(&buffer);
1.12 markus 406: }
407: buffer_free(&buffer);
1.24 markus 408: return success;
1.12 markus 409: }
1.1 deraadt 410:
1.25 markus 411: /* ask agent to sign data, returns -1 on error, 0 on success */
412: int
413: ssh_agent_sign(AuthenticationConnection *auth,
414: Key *key,
1.48 markus 415: u_char **sigp, u_int *lenp,
416: u_char *data, u_int datalen)
1.25 markus 417: {
1.28 markus 418: extern int datafellows;
1.25 markus 419: Buffer msg;
1.31 markus 420: u_char *blob;
421: u_int blen;
1.28 markus 422: int type, flags = 0;
1.25 markus 423: int ret = -1;
424:
1.30 markus 425: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 426: return -1;
427:
1.28 markus 428: if (datafellows & SSH_BUG_SIGBLOB)
429: flags = SSH_AGENT_OLD_SIGNATURE;
430:
1.25 markus 431: buffer_init(&msg);
432: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
433: buffer_put_string(&msg, blob, blen);
434: buffer_put_string(&msg, data, datalen);
1.28 markus 435: buffer_put_int(&msg, flags);
1.25 markus 436: xfree(blob);
437:
438: if (ssh_request_reply(auth, &msg, &msg) == 0) {
439: buffer_free(&msg);
440: return -1;
441: }
442: type = buffer_get_char(&msg);
1.29 markus 443: if (agent_failed(type)) {
1.59 ! itojun 444: logit("Agent admitted failure to sign using the key.");
1.25 markus 445: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
446: fatal("Bad authentication response: %d", type);
447: } else {
448: ret = 0;
449: *sigp = buffer_get_string(&msg, lenp);
450: }
451: buffer_free(&msg);
452: return ret;
453: }
454:
1.22 markus 455: /* Encode key for a message to the agent. */
456:
1.41 itojun 457: static void
1.30 markus 458: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 459: {
460: buffer_put_int(b, BN_num_bits(key->n));
461: buffer_put_bignum(b, key->n);
462: buffer_put_bignum(b, key->e);
463: buffer_put_bignum(b, key->d);
464: /* To keep within the protocol: p < q for ssh. in SSL p > q */
465: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
466: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
467: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 468: buffer_put_cstring(b, comment);
1.22 markus 469: }
470:
1.41 itojun 471: static void
1.30 markus 472: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 473: {
1.30 markus 474: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 475: switch (key->type) {
1.30 markus 476: case KEY_RSA:
477: buffer_put_bignum2(b, key->rsa->n);
478: buffer_put_bignum2(b, key->rsa->e);
479: buffer_put_bignum2(b, key->rsa->d);
480: buffer_put_bignum2(b, key->rsa->iqmp);
481: buffer_put_bignum2(b, key->rsa->p);
482: buffer_put_bignum2(b, key->rsa->q);
483: break;
484: case KEY_DSA:
485: buffer_put_bignum2(b, key->dsa->p);
486: buffer_put_bignum2(b, key->dsa->q);
487: buffer_put_bignum2(b, key->dsa->g);
488: buffer_put_bignum2(b, key->dsa->pub_key);
489: buffer_put_bignum2(b, key->dsa->priv_key);
490: break;
491: }
492: buffer_put_cstring(b, comment);
1.22 markus 493: }
494:
1.14 markus 495: /*
496: * Adds an identity to the authentication server. This call is not meant to
497: * be used by normal applications.
498: */
1.1 deraadt 499:
1.18 markus 500: int
1.54 markus 501: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 502: const char *comment, u_int life, u_int confirm)
1.1 deraadt 503: {
1.25 markus 504: Buffer msg;
1.58 markus 505: int type, constrained = (life || confirm);
1.12 markus 506:
1.25 markus 507: buffer_init(&msg);
1.22 markus 508:
509: switch (key->type) {
1.30 markus 510: case KEY_RSA1:
1.54 markus 511: type = constrained ?
512: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
513: SSH_AGENTC_ADD_RSA_IDENTITY;
514: buffer_put_char(&msg, type);
1.30 markus 515: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
516: break;
1.22 markus 517: case KEY_RSA:
518: case KEY_DSA:
1.54 markus 519: type = constrained ?
520: SSH2_AGENTC_ADD_ID_CONSTRAINED :
521: SSH2_AGENTC_ADD_IDENTITY;
522: buffer_put_char(&msg, type);
1.30 markus 523: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 524: break;
525: default:
1.25 markus 526: buffer_free(&msg);
1.22 markus 527: return 0;
528: break;
529: }
1.54 markus 530: if (constrained) {
531: if (life != 0) {
532: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
533: buffer_put_int(&msg, life);
534: }
1.58 markus 535: if (confirm != 0)
536: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 537: }
1.25 markus 538: if (ssh_request_reply(auth, &msg, &msg) == 0) {
539: buffer_free(&msg);
1.12 markus 540: return 0;
541: }
1.25 markus 542: type = buffer_get_char(&msg);
543: buffer_free(&msg);
1.24 markus 544: return decode_reply(type);
1.12 markus 545: }
1.1 deraadt 546:
1.54 markus 547: int
548: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
549: {
1.58 markus 550: return ssh_add_identity_constrained(auth, key, comment, 0, 0);
1.54 markus 551: }
552:
1.14 markus 553: /*
554: * Removes an identity from the authentication server. This call is not
555: * meant to be used by normal applications.
556: */
1.1 deraadt 557:
1.18 markus 558: int
1.25 markus 559: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 560: {
1.25 markus 561: Buffer msg;
1.24 markus 562: int type;
1.31 markus 563: u_char *blob;
564: u_int blen;
1.12 markus 565:
1.25 markus 566: buffer_init(&msg);
1.12 markus 567:
1.30 markus 568: if (key->type == KEY_RSA1) {
1.25 markus 569: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
570: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
571: buffer_put_bignum(&msg, key->rsa->e);
572: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 573: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
574: key_to_blob(key, &blob, &blen);
1.25 markus 575: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 576: buffer_put_string(&msg, blob, blen);
577: xfree(blob);
578: } else {
579: buffer_free(&msg);
580: return 0;
581: }
1.42 markus 582: if (ssh_request_reply(auth, &msg, &msg) == 0) {
583: buffer_free(&msg);
584: return 0;
585: }
586: type = buffer_get_char(&msg);
587: buffer_free(&msg);
588: return decode_reply(type);
589: }
590:
591: int
1.49 rees 592: ssh_update_card(AuthenticationConnection *auth, int add, const char *reader_id, const char *pin)
1.42 markus 593: {
594: Buffer msg;
595: int type;
596:
597: buffer_init(&msg);
598: buffer_put_char(&msg, add ? SSH_AGENTC_ADD_SMARTCARD_KEY :
599: SSH_AGENTC_REMOVE_SMARTCARD_KEY);
1.43 markus 600: buffer_put_cstring(&msg, reader_id);
1.49 rees 601: buffer_put_cstring(&msg, pin);
1.25 markus 602: if (ssh_request_reply(auth, &msg, &msg) == 0) {
603: buffer_free(&msg);
1.12 markus 604: return 0;
605: }
1.25 markus 606: type = buffer_get_char(&msg);
607: buffer_free(&msg);
1.24 markus 608: return decode_reply(type);
1.12 markus 609: }
610:
1.14 markus 611: /*
612: * Removes all identities from the agent. This call is not meant to be used
613: * by normal applications.
614: */
1.1 deraadt 615:
1.18 markus 616: int
1.25 markus 617: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 618: {
1.25 markus 619: Buffer msg;
1.24 markus 620: int type;
1.25 markus 621: int code = (version==1) ?
622: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
623: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 624:
1.25 markus 625: buffer_init(&msg);
626: buffer_put_char(&msg, code);
1.12 markus 627:
1.25 markus 628: if (ssh_request_reply(auth, &msg, &msg) == 0) {
629: buffer_free(&msg);
1.12 markus 630: return 0;
631: }
1.25 markus 632: type = buffer_get_char(&msg);
633: buffer_free(&msg);
1.24 markus 634: return decode_reply(type);
1.21 markus 635: }
636:
1.35 stevesk 637: int
1.24 markus 638: decode_reply(int type)
1.21 markus 639: {
1.12 markus 640: switch (type) {
641: case SSH_AGENT_FAILURE:
1.29 markus 642: case SSH_COM_AGENT2_FAILURE:
1.44 markus 643: case SSH2_AGENT_FAILURE:
1.59 ! itojun 644: logit("SSH_AGENT_FAILURE");
1.12 markus 645: return 0;
646: case SSH_AGENT_SUCCESS:
647: return 1;
648: default:
1.21 markus 649: fatal("Bad response from authentication agent: %d", type);
1.12 markus 650: }
651: /* NOTREACHED */
652: return 0;
653: }
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