Annotation of src/usr.bin/ssh/authfd.c, Revision 1.65
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"
1.65 ! avsm 38: RCSID("$OpenBSD: authfd.c,v 1.64 2004/08/11 21:44:31 avsm 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: */
1.64 avsm 136: if (atomicio(read, auth->fd, buf, 4) != 4) {
137: error("Error reading response length from authentication socket.");
138: return 0;
1.24 markus 139: }
140:
141: /* Extract the length, and check it for sanity. */
142: len = GET_32BIT(buf);
143: if (len > 256 * 1024)
1.62 miod 144: fatal("Authentication response too long: %u", len);
1.24 markus 145:
146: /* Read the rest of the response in to the buffer. */
147: buffer_clear(reply);
148: while (len > 0) {
149: l = len;
150: if (l > sizeof(buf))
151: l = sizeof(buf);
1.65 ! avsm 152: if (atomicio(read, auth->fd, buf, l) != l) {
1.24 markus 153: error("Error reading response from authentication socket.");
154: return 0;
155: }
1.56 markus 156: buffer_append(reply, buf, l);
1.24 markus 157: len -= l;
158: }
159: return 1;
160: }
161:
1.14 markus 162: /*
163: * Closes the agent socket if it should be closed (depends on how it was
164: * obtained). The argument must have been returned by
165: * ssh_get_authentication_socket().
166: */
1.1 deraadt 167:
1.18 markus 168: void
1.12 markus 169: ssh_close_authentication_socket(int sock)
1.1 deraadt 170: {
1.12 markus 171: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
172: close(sock);
1.1 deraadt 173: }
174:
1.14 markus 175: /*
176: * Opens and connects a private socket for communication with the
177: * authentication agent. Returns the file descriptor (which must be
178: * shut down and closed by the caller when no longer needed).
179: * Returns NULL if an error occurred and the connection could not be
180: * opened.
181: */
1.1 deraadt 182:
1.12 markus 183: AuthenticationConnection *
1.32 markus 184: ssh_get_authentication_connection(void)
1.1 deraadt 185: {
1.12 markus 186: AuthenticationConnection *auth;
187: int sock;
1.1 deraadt 188:
1.12 markus 189: sock = ssh_get_authentication_socket();
190:
1.14 markus 191: /*
192: * Fail if we couldn't obtain a connection. This happens if we
193: * exited due to a timeout.
194: */
1.12 markus 195: if (sock < 0)
196: return NULL;
197:
198: auth = xmalloc(sizeof(*auth));
199: auth->fd = sock;
200: buffer_init(&auth->identities);
201: auth->howmany = 0;
202:
203: return auth;
1.1 deraadt 204: }
205:
1.14 markus 206: /*
207: * Closes the connection to the authentication agent and frees any associated
208: * memory.
209: */
1.1 deraadt 210:
1.18 markus 211: void
1.25 markus 212: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 213: {
1.25 markus 214: buffer_free(&auth->identities);
215: close(auth->fd);
216: xfree(auth);
1.50 markus 217: }
218:
219: /* Lock/unlock agent */
220: int
221: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
222: {
223: int type;
224: Buffer msg;
225:
226: buffer_init(&msg);
227: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
228: buffer_put_cstring(&msg, password);
229:
230: if (ssh_request_reply(auth, &msg, &msg) == 0) {
231: buffer_free(&msg);
232: return 0;
233: }
234: type = buffer_get_char(&msg);
235: buffer_free(&msg);
236: return decode_reply(type);
1.1 deraadt 237: }
238:
1.14 markus 239: /*
240: * Returns the first authentication identity held by the agent.
241: */
1.1 deraadt 242:
1.30 markus 243: int
244: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 245: {
1.25 markus 246: int type, code1 = 0, code2 = 0;
1.24 markus 247: Buffer request;
1.25 markus 248:
1.46 deraadt 249: switch (version) {
1.25 markus 250: case 1:
251: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
252: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
253: break;
254: case 2:
255: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
256: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
257: break;
258: default:
1.30 markus 259: return 0;
1.25 markus 260: }
1.1 deraadt 261:
1.14 markus 262: /*
263: * Send a message to the agent requesting for a list of the
264: * identities it can represent.
265: */
1.24 markus 266: buffer_init(&request);
1.25 markus 267: buffer_put_char(&request, code1);
1.12 markus 268:
269: buffer_clear(&auth->identities);
1.24 markus 270: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
271: buffer_free(&request);
1.30 markus 272: return 0;
1.12 markus 273: }
1.24 markus 274: buffer_free(&request);
1.1 deraadt 275:
1.12 markus 276: /* Get message type, and verify that we got a proper answer. */
1.24 markus 277: type = buffer_get_char(&auth->identities);
1.29 markus 278: if (agent_failed(type)) {
1.30 markus 279: return 0;
1.25 markus 280: } else if (type != code2) {
1.24 markus 281: fatal("Bad authentication reply message type: %d", type);
1.25 markus 282: }
1.12 markus 283:
284: /* Get the number of entries in the response and check it for sanity. */
285: auth->howmany = buffer_get_int(&auth->identities);
1.62 miod 286: if ((u_int)auth->howmany > 1024)
1.37 millert 287: fatal("Too many identities in authentication reply: %d",
1.24 markus 288: auth->howmany);
1.12 markus 289:
1.30 markus 290: return auth->howmany;
291: }
292:
293: Key *
294: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
295: {
296: /* get number of identities and return the first entry (if any). */
297: if (ssh_get_num_identities(auth, version) > 0)
298: return ssh_get_next_identity(auth, comment, version);
299: return NULL;
1.1 deraadt 300: }
301:
1.25 markus 302: Key *
303: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 304: {
1.31 markus 305: u_int bits;
306: u_char *blob;
307: u_int blen;
1.25 markus 308: Key *key = NULL;
1.9 markus 309:
1.12 markus 310: /* Return failure if no more entries. */
311: if (auth->howmany <= 0)
1.25 markus 312: return NULL;
1.12 markus 313:
1.14 markus 314: /*
315: * Get the next entry from the packet. These will abort with a fatal
316: * error if the packet is too short or contains corrupt data.
317: */
1.46 deraadt 318: switch (version) {
1.25 markus 319: case 1:
1.30 markus 320: key = key_new(KEY_RSA1);
1.25 markus 321: bits = buffer_get_int(&auth->identities);
322: buffer_get_bignum(&auth->identities, key->rsa->e);
323: buffer_get_bignum(&auth->identities, key->rsa->n);
324: *comment = buffer_get_string(&auth->identities, NULL);
325: if (bits != BN_num_bits(key->rsa->n))
1.59 itojun 326: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 327: BN_num_bits(key->rsa->n), bits);
328: break;
329: case 2:
330: blob = buffer_get_string(&auth->identities, &blen);
331: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 332: key = key_from_blob(blob, blen);
1.25 markus 333: xfree(blob);
334: break;
335: default:
336: return NULL;
337: break;
338: }
1.12 markus 339: /* Decrement the number of remaining entries. */
340: auth->howmany--;
1.25 markus 341: return key;
1.1 deraadt 342: }
343:
1.14 markus 344: /*
345: * Generates a random challenge, sends it to the agent, and waits for
346: * response from the agent. Returns true (non-zero) if the agent gave the
347: * correct answer, zero otherwise. Response type selects the style of
348: * response desired, with 0 corresponding to protocol version 1.0 (no longer
349: * supported) and 1 corresponding to protocol version 1.1.
350: */
1.1 deraadt 351:
1.2 provos 352: int
353: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 354: Key* key, BIGNUM *challenge,
1.31 markus 355: u_char session_id[16],
356: u_int response_type,
357: u_char response[16])
1.1 deraadt 358: {
1.12 markus 359: Buffer buffer;
1.24 markus 360: int success = 0;
361: int i;
362: int type;
1.12 markus 363:
1.30 markus 364: if (key->type != KEY_RSA1)
1.25 markus 365: return 0;
366: if (response_type == 0) {
1.59 itojun 367: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 368: return 0;
369: }
1.12 markus 370: buffer_init(&buffer);
1.24 markus 371: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 372: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
373: buffer_put_bignum(&buffer, key->rsa->e);
374: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 375: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 376: buffer_append(&buffer, session_id, 16);
1.12 markus 377: buffer_put_int(&buffer, response_type);
378:
1.24 markus 379: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 380: buffer_free(&buffer);
381: return 0;
382: }
1.24 markus 383: type = buffer_get_char(&buffer);
1.12 markus 384:
1.29 markus 385: if (agent_failed(type)) {
1.59 itojun 386: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 387: } else if (type != SSH_AGENT_RSA_RESPONSE) {
388: fatal("Bad authentication response: %d", type);
389: } else {
390: success = 1;
391: /*
392: * Get the response from the packet. This will abort with a
393: * fatal error if the packet is corrupt.
394: */
395: for (i = 0; i < 16; i++)
396: response[i] = buffer_get_char(&buffer);
1.12 markus 397: }
398: buffer_free(&buffer);
1.24 markus 399: return success;
1.12 markus 400: }
1.1 deraadt 401:
1.25 markus 402: /* ask agent to sign data, returns -1 on error, 0 on success */
403: int
404: ssh_agent_sign(AuthenticationConnection *auth,
405: Key *key,
1.48 markus 406: u_char **sigp, u_int *lenp,
407: u_char *data, u_int datalen)
1.25 markus 408: {
1.28 markus 409: extern int datafellows;
1.25 markus 410: Buffer msg;
1.31 markus 411: u_char *blob;
412: u_int blen;
1.28 markus 413: int type, flags = 0;
1.25 markus 414: int ret = -1;
415:
1.30 markus 416: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 417: return -1;
418:
1.28 markus 419: if (datafellows & SSH_BUG_SIGBLOB)
420: flags = SSH_AGENT_OLD_SIGNATURE;
421:
1.25 markus 422: buffer_init(&msg);
423: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
424: buffer_put_string(&msg, blob, blen);
425: buffer_put_string(&msg, data, datalen);
1.28 markus 426: buffer_put_int(&msg, flags);
1.25 markus 427: xfree(blob);
428:
429: if (ssh_request_reply(auth, &msg, &msg) == 0) {
430: buffer_free(&msg);
431: return -1;
432: }
433: type = buffer_get_char(&msg);
1.29 markus 434: if (agent_failed(type)) {
1.59 itojun 435: logit("Agent admitted failure to sign using the key.");
1.25 markus 436: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
437: fatal("Bad authentication response: %d", type);
438: } else {
439: ret = 0;
440: *sigp = buffer_get_string(&msg, lenp);
441: }
442: buffer_free(&msg);
443: return ret;
444: }
445:
1.22 markus 446: /* Encode key for a message to the agent. */
447:
1.41 itojun 448: static void
1.30 markus 449: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 450: {
451: buffer_put_int(b, BN_num_bits(key->n));
452: buffer_put_bignum(b, key->n);
453: buffer_put_bignum(b, key->e);
454: buffer_put_bignum(b, key->d);
455: /* To keep within the protocol: p < q for ssh. in SSL p > q */
456: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
457: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
458: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 459: buffer_put_cstring(b, comment);
1.22 markus 460: }
461:
1.41 itojun 462: static void
1.30 markus 463: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 464: {
1.30 markus 465: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 466: switch (key->type) {
1.30 markus 467: case KEY_RSA:
468: buffer_put_bignum2(b, key->rsa->n);
469: buffer_put_bignum2(b, key->rsa->e);
470: buffer_put_bignum2(b, key->rsa->d);
471: buffer_put_bignum2(b, key->rsa->iqmp);
472: buffer_put_bignum2(b, key->rsa->p);
473: buffer_put_bignum2(b, key->rsa->q);
474: break;
475: case KEY_DSA:
476: buffer_put_bignum2(b, key->dsa->p);
477: buffer_put_bignum2(b, key->dsa->q);
478: buffer_put_bignum2(b, key->dsa->g);
479: buffer_put_bignum2(b, key->dsa->pub_key);
480: buffer_put_bignum2(b, key->dsa->priv_key);
481: break;
482: }
483: buffer_put_cstring(b, comment);
1.22 markus 484: }
485:
1.14 markus 486: /*
487: * Adds an identity to the authentication server. This call is not meant to
488: * be used by normal applications.
489: */
1.1 deraadt 490:
1.18 markus 491: int
1.54 markus 492: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 493: const char *comment, u_int life, u_int confirm)
1.1 deraadt 494: {
1.25 markus 495: Buffer msg;
1.58 markus 496: int type, constrained = (life || confirm);
1.12 markus 497:
1.25 markus 498: buffer_init(&msg);
1.22 markus 499:
500: switch (key->type) {
1.30 markus 501: case KEY_RSA1:
1.54 markus 502: type = constrained ?
503: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
504: SSH_AGENTC_ADD_RSA_IDENTITY;
505: buffer_put_char(&msg, type);
1.30 markus 506: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
507: break;
1.22 markus 508: case KEY_RSA:
509: case KEY_DSA:
1.54 markus 510: type = constrained ?
511: SSH2_AGENTC_ADD_ID_CONSTRAINED :
512: SSH2_AGENTC_ADD_IDENTITY;
513: buffer_put_char(&msg, type);
1.30 markus 514: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 515: break;
516: default:
1.25 markus 517: buffer_free(&msg);
1.22 markus 518: return 0;
519: break;
520: }
1.54 markus 521: if (constrained) {
522: if (life != 0) {
523: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
524: buffer_put_int(&msg, life);
525: }
1.58 markus 526: if (confirm != 0)
527: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 528: }
1.25 markus 529: if (ssh_request_reply(auth, &msg, &msg) == 0) {
530: buffer_free(&msg);
1.12 markus 531: return 0;
532: }
1.25 markus 533: type = buffer_get_char(&msg);
534: buffer_free(&msg);
1.24 markus 535: return decode_reply(type);
1.12 markus 536: }
1.1 deraadt 537:
1.54 markus 538: int
539: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
540: {
1.58 markus 541: return ssh_add_identity_constrained(auth, key, comment, 0, 0);
1.54 markus 542: }
543:
1.14 markus 544: /*
545: * Removes an identity from the authentication server. This call is not
546: * meant to be used by normal applications.
547: */
1.1 deraadt 548:
1.18 markus 549: int
1.25 markus 550: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 551: {
1.25 markus 552: Buffer msg;
1.24 markus 553: int type;
1.31 markus 554: u_char *blob;
555: u_int blen;
1.12 markus 556:
1.25 markus 557: buffer_init(&msg);
1.12 markus 558:
1.30 markus 559: if (key->type == KEY_RSA1) {
1.25 markus 560: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
561: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
562: buffer_put_bignum(&msg, key->rsa->e);
563: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 564: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
565: key_to_blob(key, &blob, &blen);
1.25 markus 566: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 567: buffer_put_string(&msg, blob, blen);
568: xfree(blob);
569: } else {
570: buffer_free(&msg);
571: return 0;
572: }
1.42 markus 573: if (ssh_request_reply(auth, &msg, &msg) == 0) {
574: buffer_free(&msg);
575: return 0;
576: }
577: type = buffer_get_char(&msg);
578: buffer_free(&msg);
579: return decode_reply(type);
580: }
581:
582: int
1.63 djm 583: ssh_update_card(AuthenticationConnection *auth, int add,
1.60 djm 584: const char *reader_id, const char *pin, u_int life, u_int confirm)
1.42 markus 585: {
586: Buffer msg;
1.60 djm 587: int type, constrained = (life || confirm);
588:
589: if (add) {
590: type = constrained ?
591: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
592: SSH_AGENTC_ADD_SMARTCARD_KEY;
593: } else
594: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 595:
596: buffer_init(&msg);
1.60 djm 597: buffer_put_char(&msg, type);
1.43 markus 598: buffer_put_cstring(&msg, reader_id);
1.49 rees 599: buffer_put_cstring(&msg, pin);
1.63 djm 600:
1.60 djm 601: if (constrained) {
602: if (life != 0) {
603: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
604: buffer_put_int(&msg, life);
605: }
606: if (confirm != 0)
607: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
608: }
609:
1.25 markus 610: if (ssh_request_reply(auth, &msg, &msg) == 0) {
611: buffer_free(&msg);
1.12 markus 612: return 0;
613: }
1.25 markus 614: type = buffer_get_char(&msg);
615: buffer_free(&msg);
1.24 markus 616: return decode_reply(type);
1.12 markus 617: }
618:
1.14 markus 619: /*
620: * Removes all identities from the agent. This call is not meant to be used
621: * by normal applications.
622: */
1.1 deraadt 623:
1.18 markus 624: int
1.25 markus 625: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 626: {
1.25 markus 627: Buffer msg;
1.24 markus 628: int type;
1.25 markus 629: int code = (version==1) ?
630: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
631: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 632:
1.25 markus 633: buffer_init(&msg);
634: buffer_put_char(&msg, code);
1.12 markus 635:
1.25 markus 636: if (ssh_request_reply(auth, &msg, &msg) == 0) {
637: buffer_free(&msg);
1.12 markus 638: return 0;
639: }
1.25 markus 640: type = buffer_get_char(&msg);
641: buffer_free(&msg);
1.24 markus 642: return decode_reply(type);
1.21 markus 643: }
644:
1.35 stevesk 645: int
1.24 markus 646: decode_reply(int type)
1.21 markus 647: {
1.12 markus 648: switch (type) {
649: case SSH_AGENT_FAILURE:
1.29 markus 650: case SSH_COM_AGENT2_FAILURE:
1.44 markus 651: case SSH2_AGENT_FAILURE:
1.59 itojun 652: logit("SSH_AGENT_FAILURE");
1.12 markus 653: return 0;
654: case SSH_AGENT_SUCCESS:
655: return 1;
656: default:
1.21 markus 657: fatal("Bad response from authentication agent: %d", type);
1.12 markus 658: }
659: /* NOTREACHED */
660: return 0;
661: }
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