Annotation of src/usr.bin/ssh/authfd.c, Revision 1.62
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"
1.62 ! miod 38: RCSID("$OpenBSD: authfd.c,v 1.61 2003/06/28 16:23:06 deraadt 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: {
1.62 ! miod 117: int l;
! 118: u_int len;
1.24 markus 119: char buf[1024];
120:
121: /* Get the length of the message, and format it in the buffer. */
122: len = buffer_len(request);
123: PUT_32BIT(buf, len);
124:
125: /* Send the length and then the packet to the agent. */
1.61 deraadt 126: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
127: atomicio(vwrite, auth->fd, buffer_ptr(request),
1.24 markus 128: buffer_len(request)) != buffer_len(request)) {
129: error("Error writing to authentication socket.");
130: return 0;
131: }
132: /*
133: * Wait for response from the agent. First read the length of the
134: * response packet.
135: */
136: len = 4;
137: while (len > 0) {
138: l = read(auth->fd, buf + 4 - len, len);
1.38 deraadt 139: if (l == -1 && (errno == EAGAIN || errno == EINTR))
1.39 markus 140: continue;
1.24 markus 141: if (l <= 0) {
142: error("Error reading response length from authentication socket.");
143: return 0;
144: }
145: len -= l;
146: }
147:
148: /* Extract the length, and check it for sanity. */
149: len = GET_32BIT(buf);
150: if (len > 256 * 1024)
1.62 ! miod 151: fatal("Authentication response too long: %u", len);
1.24 markus 152:
153: /* Read the rest of the response in to the buffer. */
154: buffer_clear(reply);
155: while (len > 0) {
156: l = len;
157: if (l > sizeof(buf))
158: l = sizeof(buf);
159: l = read(auth->fd, buf, l);
1.38 deraadt 160: if (l == -1 && (errno == EAGAIN || errno == EINTR))
1.39 markus 161: continue;
1.24 markus 162: if (l <= 0) {
163: error("Error reading response from authentication socket.");
164: return 0;
165: }
1.56 markus 166: buffer_append(reply, buf, l);
1.24 markus 167: len -= l;
168: }
169: return 1;
170: }
171:
1.14 markus 172: /*
173: * Closes the agent socket if it should be closed (depends on how it was
174: * obtained). The argument must have been returned by
175: * ssh_get_authentication_socket().
176: */
1.1 deraadt 177:
1.18 markus 178: void
1.12 markus 179: ssh_close_authentication_socket(int sock)
1.1 deraadt 180: {
1.12 markus 181: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
182: close(sock);
1.1 deraadt 183: }
184:
1.14 markus 185: /*
186: * Opens and connects a private socket for communication with the
187: * authentication agent. Returns the file descriptor (which must be
188: * shut down and closed by the caller when no longer needed).
189: * Returns NULL if an error occurred and the connection could not be
190: * opened.
191: */
1.1 deraadt 192:
1.12 markus 193: AuthenticationConnection *
1.32 markus 194: ssh_get_authentication_connection(void)
1.1 deraadt 195: {
1.12 markus 196: AuthenticationConnection *auth;
197: int sock;
1.1 deraadt 198:
1.12 markus 199: sock = ssh_get_authentication_socket();
200:
1.14 markus 201: /*
202: * Fail if we couldn't obtain a connection. This happens if we
203: * exited due to a timeout.
204: */
1.12 markus 205: if (sock < 0)
206: return NULL;
207:
208: auth = xmalloc(sizeof(*auth));
209: auth->fd = sock;
210: buffer_init(&auth->identities);
211: auth->howmany = 0;
212:
213: return auth;
1.1 deraadt 214: }
215:
1.14 markus 216: /*
217: * Closes the connection to the authentication agent and frees any associated
218: * memory.
219: */
1.1 deraadt 220:
1.18 markus 221: void
1.25 markus 222: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 223: {
1.25 markus 224: buffer_free(&auth->identities);
225: close(auth->fd);
226: xfree(auth);
1.50 markus 227: }
228:
229: /* Lock/unlock agent */
230: int
231: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
232: {
233: int type;
234: Buffer msg;
235:
236: buffer_init(&msg);
237: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
238: buffer_put_cstring(&msg, password);
239:
240: if (ssh_request_reply(auth, &msg, &msg) == 0) {
241: buffer_free(&msg);
242: return 0;
243: }
244: type = buffer_get_char(&msg);
245: buffer_free(&msg);
246: return decode_reply(type);
1.1 deraadt 247: }
248:
1.14 markus 249: /*
250: * Returns the first authentication identity held by the agent.
251: */
1.1 deraadt 252:
1.30 markus 253: int
254: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 255: {
1.25 markus 256: int type, code1 = 0, code2 = 0;
1.24 markus 257: Buffer request;
1.25 markus 258:
1.46 deraadt 259: switch (version) {
1.25 markus 260: case 1:
261: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
262: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
263: break;
264: case 2:
265: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
266: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
267: break;
268: default:
1.30 markus 269: return 0;
1.25 markus 270: }
1.1 deraadt 271:
1.14 markus 272: /*
273: * Send a message to the agent requesting for a list of the
274: * identities it can represent.
275: */
1.24 markus 276: buffer_init(&request);
1.25 markus 277: buffer_put_char(&request, code1);
1.12 markus 278:
279: buffer_clear(&auth->identities);
1.24 markus 280: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
281: buffer_free(&request);
1.30 markus 282: return 0;
1.12 markus 283: }
1.24 markus 284: buffer_free(&request);
1.1 deraadt 285:
1.12 markus 286: /* Get message type, and verify that we got a proper answer. */
1.24 markus 287: type = buffer_get_char(&auth->identities);
1.29 markus 288: if (agent_failed(type)) {
1.30 markus 289: return 0;
1.25 markus 290: } else if (type != code2) {
1.24 markus 291: fatal("Bad authentication reply message type: %d", type);
1.25 markus 292: }
1.12 markus 293:
294: /* Get the number of entries in the response and check it for sanity. */
295: auth->howmany = buffer_get_int(&auth->identities);
1.62 ! miod 296: if ((u_int)auth->howmany > 1024)
1.37 millert 297: fatal("Too many identities in authentication reply: %d",
1.24 markus 298: auth->howmany);
1.12 markus 299:
1.30 markus 300: return auth->howmany;
301: }
302:
303: Key *
304: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
305: {
306: /* get number of identities and return the first entry (if any). */
307: if (ssh_get_num_identities(auth, version) > 0)
308: return ssh_get_next_identity(auth, comment, version);
309: return NULL;
1.1 deraadt 310: }
311:
1.25 markus 312: Key *
313: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 314: {
1.31 markus 315: u_int bits;
316: u_char *blob;
317: u_int blen;
1.25 markus 318: Key *key = NULL;
1.9 markus 319:
1.12 markus 320: /* Return failure if no more entries. */
321: if (auth->howmany <= 0)
1.25 markus 322: return NULL;
1.12 markus 323:
1.14 markus 324: /*
325: * Get the next entry from the packet. These will abort with a fatal
326: * error if the packet is too short or contains corrupt data.
327: */
1.46 deraadt 328: switch (version) {
1.25 markus 329: case 1:
1.30 markus 330: key = key_new(KEY_RSA1);
1.25 markus 331: bits = buffer_get_int(&auth->identities);
332: buffer_get_bignum(&auth->identities, key->rsa->e);
333: buffer_get_bignum(&auth->identities, key->rsa->n);
334: *comment = buffer_get_string(&auth->identities, NULL);
335: if (bits != BN_num_bits(key->rsa->n))
1.59 itojun 336: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 337: BN_num_bits(key->rsa->n), bits);
338: break;
339: case 2:
340: blob = buffer_get_string(&auth->identities, &blen);
341: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 342: key = key_from_blob(blob, blen);
1.25 markus 343: xfree(blob);
344: break;
345: default:
346: return NULL;
347: break;
348: }
1.12 markus 349: /* Decrement the number of remaining entries. */
350: auth->howmany--;
1.25 markus 351: return key;
1.1 deraadt 352: }
353:
1.14 markus 354: /*
355: * Generates a random challenge, sends it to the agent, and waits for
356: * response from the agent. Returns true (non-zero) if the agent gave the
357: * correct answer, zero otherwise. Response type selects the style of
358: * response desired, with 0 corresponding to protocol version 1.0 (no longer
359: * supported) and 1 corresponding to protocol version 1.1.
360: */
1.1 deraadt 361:
1.2 provos 362: int
363: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 364: Key* key, BIGNUM *challenge,
1.31 markus 365: u_char session_id[16],
366: u_int response_type,
367: u_char response[16])
1.1 deraadt 368: {
1.12 markus 369: Buffer buffer;
1.24 markus 370: int success = 0;
371: int i;
372: int type;
1.12 markus 373:
1.30 markus 374: if (key->type != KEY_RSA1)
1.25 markus 375: return 0;
376: if (response_type == 0) {
1.59 itojun 377: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 378: return 0;
379: }
1.12 markus 380: buffer_init(&buffer);
1.24 markus 381: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 382: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
383: buffer_put_bignum(&buffer, key->rsa->e);
384: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 385: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 386: buffer_append(&buffer, session_id, 16);
1.12 markus 387: buffer_put_int(&buffer, response_type);
388:
1.24 markus 389: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 390: buffer_free(&buffer);
391: return 0;
392: }
1.24 markus 393: type = buffer_get_char(&buffer);
1.12 markus 394:
1.29 markus 395: if (agent_failed(type)) {
1.59 itojun 396: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 397: } else if (type != SSH_AGENT_RSA_RESPONSE) {
398: fatal("Bad authentication response: %d", type);
399: } else {
400: success = 1;
401: /*
402: * Get the response from the packet. This will abort with a
403: * fatal error if the packet is corrupt.
404: */
405: for (i = 0; i < 16; i++)
406: response[i] = buffer_get_char(&buffer);
1.12 markus 407: }
408: buffer_free(&buffer);
1.24 markus 409: return success;
1.12 markus 410: }
1.1 deraadt 411:
1.25 markus 412: /* ask agent to sign data, returns -1 on error, 0 on success */
413: int
414: ssh_agent_sign(AuthenticationConnection *auth,
415: Key *key,
1.48 markus 416: u_char **sigp, u_int *lenp,
417: u_char *data, u_int datalen)
1.25 markus 418: {
1.28 markus 419: extern int datafellows;
1.25 markus 420: Buffer msg;
1.31 markus 421: u_char *blob;
422: u_int blen;
1.28 markus 423: int type, flags = 0;
1.25 markus 424: int ret = -1;
425:
1.30 markus 426: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 427: return -1;
428:
1.28 markus 429: if (datafellows & SSH_BUG_SIGBLOB)
430: flags = SSH_AGENT_OLD_SIGNATURE;
431:
1.25 markus 432: buffer_init(&msg);
433: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
434: buffer_put_string(&msg, blob, blen);
435: buffer_put_string(&msg, data, datalen);
1.28 markus 436: buffer_put_int(&msg, flags);
1.25 markus 437: xfree(blob);
438:
439: if (ssh_request_reply(auth, &msg, &msg) == 0) {
440: buffer_free(&msg);
441: return -1;
442: }
443: type = buffer_get_char(&msg);
1.29 markus 444: if (agent_failed(type)) {
1.59 itojun 445: logit("Agent admitted failure to sign using the key.");
1.25 markus 446: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
447: fatal("Bad authentication response: %d", type);
448: } else {
449: ret = 0;
450: *sigp = buffer_get_string(&msg, lenp);
451: }
452: buffer_free(&msg);
453: return ret;
454: }
455:
1.22 markus 456: /* Encode key for a message to the agent. */
457:
1.41 itojun 458: static void
1.30 markus 459: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 460: {
461: buffer_put_int(b, BN_num_bits(key->n));
462: buffer_put_bignum(b, key->n);
463: buffer_put_bignum(b, key->e);
464: buffer_put_bignum(b, key->d);
465: /* To keep within the protocol: p < q for ssh. in SSL p > q */
466: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
467: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
468: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 469: buffer_put_cstring(b, comment);
1.22 markus 470: }
471:
1.41 itojun 472: static void
1.30 markus 473: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 474: {
1.30 markus 475: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 476: switch (key->type) {
1.30 markus 477: case KEY_RSA:
478: buffer_put_bignum2(b, key->rsa->n);
479: buffer_put_bignum2(b, key->rsa->e);
480: buffer_put_bignum2(b, key->rsa->d);
481: buffer_put_bignum2(b, key->rsa->iqmp);
482: buffer_put_bignum2(b, key->rsa->p);
483: buffer_put_bignum2(b, key->rsa->q);
484: break;
485: case KEY_DSA:
486: buffer_put_bignum2(b, key->dsa->p);
487: buffer_put_bignum2(b, key->dsa->q);
488: buffer_put_bignum2(b, key->dsa->g);
489: buffer_put_bignum2(b, key->dsa->pub_key);
490: buffer_put_bignum2(b, key->dsa->priv_key);
491: break;
492: }
493: buffer_put_cstring(b, comment);
1.22 markus 494: }
495:
1.14 markus 496: /*
497: * Adds an identity to the authentication server. This call is not meant to
498: * be used by normal applications.
499: */
1.1 deraadt 500:
1.18 markus 501: int
1.54 markus 502: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 503: const char *comment, u_int life, u_int confirm)
1.1 deraadt 504: {
1.25 markus 505: Buffer msg;
1.58 markus 506: int type, constrained = (life || confirm);
1.12 markus 507:
1.25 markus 508: buffer_init(&msg);
1.22 markus 509:
510: switch (key->type) {
1.30 markus 511: case KEY_RSA1:
1.54 markus 512: type = constrained ?
513: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
514: SSH_AGENTC_ADD_RSA_IDENTITY;
515: buffer_put_char(&msg, type);
1.30 markus 516: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
517: break;
1.22 markus 518: case KEY_RSA:
519: case KEY_DSA:
1.54 markus 520: type = constrained ?
521: SSH2_AGENTC_ADD_ID_CONSTRAINED :
522: SSH2_AGENTC_ADD_IDENTITY;
523: buffer_put_char(&msg, type);
1.30 markus 524: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 525: break;
526: default:
1.25 markus 527: buffer_free(&msg);
1.22 markus 528: return 0;
529: break;
530: }
1.54 markus 531: if (constrained) {
532: if (life != 0) {
533: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
534: buffer_put_int(&msg, life);
535: }
1.58 markus 536: if (confirm != 0)
537: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 538: }
1.25 markus 539: if (ssh_request_reply(auth, &msg, &msg) == 0) {
540: buffer_free(&msg);
1.12 markus 541: return 0;
542: }
1.25 markus 543: type = buffer_get_char(&msg);
544: buffer_free(&msg);
1.24 markus 545: return decode_reply(type);
1.12 markus 546: }
1.1 deraadt 547:
1.54 markus 548: int
549: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
550: {
1.58 markus 551: return ssh_add_identity_constrained(auth, key, comment, 0, 0);
1.54 markus 552: }
553:
1.14 markus 554: /*
555: * Removes an identity from the authentication server. This call is not
556: * meant to be used by normal applications.
557: */
1.1 deraadt 558:
1.18 markus 559: int
1.25 markus 560: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 561: {
1.25 markus 562: Buffer msg;
1.24 markus 563: int type;
1.31 markus 564: u_char *blob;
565: u_int blen;
1.12 markus 566:
1.25 markus 567: buffer_init(&msg);
1.12 markus 568:
1.30 markus 569: if (key->type == KEY_RSA1) {
1.25 markus 570: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
571: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
572: buffer_put_bignum(&msg, key->rsa->e);
573: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 574: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
575: key_to_blob(key, &blob, &blen);
1.25 markus 576: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 577: buffer_put_string(&msg, blob, blen);
578: xfree(blob);
579: } else {
580: buffer_free(&msg);
581: return 0;
582: }
1.42 markus 583: if (ssh_request_reply(auth, &msg, &msg) == 0) {
584: buffer_free(&msg);
585: return 0;
586: }
587: type = buffer_get_char(&msg);
588: buffer_free(&msg);
589: return decode_reply(type);
590: }
591:
592: int
1.60 djm 593: ssh_update_card(AuthenticationConnection *auth, int add,
594: const char *reader_id, const char *pin, u_int life, u_int confirm)
1.42 markus 595: {
596: Buffer msg;
1.60 djm 597: int type, constrained = (life || confirm);
598:
599: if (add) {
600: type = constrained ?
601: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
602: SSH_AGENTC_ADD_SMARTCARD_KEY;
603: } else
604: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 605:
606: buffer_init(&msg);
1.60 djm 607: buffer_put_char(&msg, type);
1.43 markus 608: buffer_put_cstring(&msg, reader_id);
1.49 rees 609: buffer_put_cstring(&msg, pin);
1.60 djm 610:
611: if (constrained) {
612: if (life != 0) {
613: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
614: buffer_put_int(&msg, life);
615: }
616: if (confirm != 0)
617: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
618: }
619:
1.25 markus 620: if (ssh_request_reply(auth, &msg, &msg) == 0) {
621: buffer_free(&msg);
1.12 markus 622: return 0;
623: }
1.25 markus 624: type = buffer_get_char(&msg);
625: buffer_free(&msg);
1.24 markus 626: return decode_reply(type);
1.12 markus 627: }
628:
1.14 markus 629: /*
630: * Removes all identities from the agent. This call is not meant to be used
631: * by normal applications.
632: */
1.1 deraadt 633:
1.18 markus 634: int
1.25 markus 635: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 636: {
1.25 markus 637: Buffer msg;
1.24 markus 638: int type;
1.25 markus 639: int code = (version==1) ?
640: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
641: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 642:
1.25 markus 643: buffer_init(&msg);
644: buffer_put_char(&msg, code);
1.12 markus 645:
1.25 markus 646: if (ssh_request_reply(auth, &msg, &msg) == 0) {
647: buffer_free(&msg);
1.12 markus 648: return 0;
649: }
1.25 markus 650: type = buffer_get_char(&msg);
651: buffer_free(&msg);
1.24 markus 652: return decode_reply(type);
1.21 markus 653: }
654:
1.35 stevesk 655: int
1.24 markus 656: decode_reply(int type)
1.21 markus 657: {
1.12 markus 658: switch (type) {
659: case SSH_AGENT_FAILURE:
1.29 markus 660: case SSH_COM_AGENT2_FAILURE:
1.44 markus 661: case SSH2_AGENT_FAILURE:
1.59 itojun 662: logit("SSH_AGENT_FAILURE");
1.12 markus 663: return 0;
664: case SSH_AGENT_SUCCESS:
665: return 1;
666: default:
1.21 markus 667: fatal("Bad response from authentication agent: %d", type);
1.12 markus 668: }
669: /* NOTREACHED */
670: return 0;
671: }
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