Annotation of src/usr.bin/ssh/authfd.c, Revision 1.75
1.75 ! stevesk 1: /* $OpenBSD: authfd.c,v 1.74 2006/03/30 09:58:15 djm Exp $ */
1.1 deraadt 2: /*
1.13 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
1.27 deraadt 6: * Functions for connecting the local authentication agent.
1.18 markus 7: *
1.27 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 markus 13: *
1.25 markus 14: * SSH2 implementation,
1.27 deraadt 15: * Copyright (c) 2000 Markus Friedl. All rights reserved.
1.25 markus 16: *
1.27 deraadt 17: * Redistribution and use in source and binary forms, with or without
18: * modification, are permitted provided that the following conditions
19: * are met:
20: * 1. Redistributions of source code must retain the above copyright
21: * notice, this list of conditions and the following disclaimer.
22: * 2. Redistributions in binary form must reproduce the above copyright
23: * notice, this list of conditions and the following disclaimer in the
24: * documentation and/or other materials provided with the distribution.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.13 deraadt 36: */
1.1 deraadt 37:
38: #include "includes.h"
1.67 stevesk 39:
40: #include <sys/types.h>
41: #include <sys/un.h>
1.75 ! stevesk 42: #include <sys/socket.h>
1.33 markus 43:
44: #include <openssl/evp.h>
1.1 deraadt 45:
46: #include "ssh.h"
47: #include "rsa.h"
48: #include "buffer.h"
49: #include "bufaux.h"
50: #include "xmalloc.h"
1.22 markus 51: #include "key.h"
52: #include "authfd.h"
1.33 markus 53: #include "cipher.h"
1.22 markus 54: #include "kex.h"
1.28 markus 55: #include "compat.h"
1.33 markus 56: #include "log.h"
57: #include "atomicio.h"
1.74 djm 58: #include "misc.h"
1.2 provos 59:
1.57 stevesk 60: static int agent_present = 0;
61:
1.21 markus 62: /* helper */
1.24 markus 63: int decode_reply(int type);
1.21 markus 64:
1.29 markus 65: /* macro to check for "agent failure" message */
66: #define agent_failed(x) \
1.44 markus 67: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 68: (x == SSH2_AGENT_FAILURE))
1.29 markus 69:
1.57 stevesk 70: int
71: ssh_agent_present(void)
72: {
73: int authfd;
74:
75: if (agent_present)
76: return 1;
77: if ((authfd = ssh_get_authentication_socket()) == -1)
78: return 0;
79: else {
80: ssh_close_authentication_socket(authfd);
81: return 1;
82: }
83: }
84:
1.1 deraadt 85: /* Returns the number of the authentication fd, or -1 if there is none. */
86:
1.2 provos 87: int
1.32 markus 88: ssh_get_authentication_socket(void)
1.1 deraadt 89: {
1.12 markus 90: const char *authsocket;
1.45 stevesk 91: int sock;
1.12 markus 92: struct sockaddr_un sunaddr;
93:
94: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
95: if (!authsocket)
96: return -1;
97:
98: sunaddr.sun_family = AF_UNIX;
99: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
100:
101: sock = socket(AF_UNIX, SOCK_STREAM, 0);
102: if (sock < 0)
103: return -1;
104:
105: /* close on exec */
106: if (fcntl(sock, F_SETFD, 1) == -1) {
107: close(sock);
108: return -1;
109: }
1.71 deraadt 110: if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) {
1.12 markus 111: close(sock);
112: return -1;
113: }
1.57 stevesk 114: agent_present = 1;
1.12 markus 115: return sock;
1.1 deraadt 116: }
117:
1.41 itojun 118: static int
1.25 markus 119: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 120: {
1.66 djm 121: u_int l, len;
1.24 markus 122: char buf[1024];
123:
124: /* Get the length of the message, and format it in the buffer. */
125: len = buffer_len(request);
1.74 djm 126: put_u32(buf, len);
1.24 markus 127:
128: /* Send the length and then the packet to the agent. */
1.61 deraadt 129: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
130: atomicio(vwrite, auth->fd, buffer_ptr(request),
1.24 markus 131: buffer_len(request)) != buffer_len(request)) {
132: error("Error writing to authentication socket.");
133: return 0;
134: }
135: /*
136: * Wait for response from the agent. First read the length of the
137: * response packet.
138: */
1.64 avsm 139: if (atomicio(read, auth->fd, buf, 4) != 4) {
140: error("Error reading response length from authentication socket.");
141: return 0;
1.24 markus 142: }
143:
144: /* Extract the length, and check it for sanity. */
1.74 djm 145: len = get_u32(buf);
1.24 markus 146: if (len > 256 * 1024)
1.62 miod 147: fatal("Authentication response too long: %u", len);
1.24 markus 148:
149: /* Read the rest of the response in to the buffer. */
150: buffer_clear(reply);
151: while (len > 0) {
152: l = len;
153: if (l > sizeof(buf))
154: l = sizeof(buf);
1.65 avsm 155: if (atomicio(read, auth->fd, buf, l) != l) {
1.24 markus 156: error("Error reading response from authentication socket.");
157: return 0;
158: }
1.56 markus 159: buffer_append(reply, buf, l);
1.24 markus 160: len -= l;
161: }
162: return 1;
163: }
164:
1.14 markus 165: /*
166: * Closes the agent socket if it should be closed (depends on how it was
167: * obtained). The argument must have been returned by
168: * ssh_get_authentication_socket().
169: */
1.1 deraadt 170:
1.18 markus 171: void
1.12 markus 172: ssh_close_authentication_socket(int sock)
1.1 deraadt 173: {
1.12 markus 174: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
175: close(sock);
1.1 deraadt 176: }
177:
1.14 markus 178: /*
179: * Opens and connects a private socket for communication with the
180: * authentication agent. Returns the file descriptor (which must be
181: * shut down and closed by the caller when no longer needed).
182: * Returns NULL if an error occurred and the connection could not be
183: * opened.
184: */
1.1 deraadt 185:
1.12 markus 186: AuthenticationConnection *
1.32 markus 187: ssh_get_authentication_connection(void)
1.1 deraadt 188: {
1.12 markus 189: AuthenticationConnection *auth;
190: int sock;
1.1 deraadt 191:
1.12 markus 192: sock = ssh_get_authentication_socket();
193:
1.14 markus 194: /*
195: * Fail if we couldn't obtain a connection. This happens if we
196: * exited due to a timeout.
197: */
1.12 markus 198: if (sock < 0)
199: return NULL;
200:
201: auth = xmalloc(sizeof(*auth));
202: auth->fd = sock;
203: buffer_init(&auth->identities);
204: auth->howmany = 0;
205:
206: return auth;
1.1 deraadt 207: }
208:
1.14 markus 209: /*
210: * Closes the connection to the authentication agent and frees any associated
211: * memory.
212: */
1.1 deraadt 213:
1.18 markus 214: void
1.25 markus 215: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 216: {
1.25 markus 217: buffer_free(&auth->identities);
218: close(auth->fd);
219: xfree(auth);
1.50 markus 220: }
221:
222: /* Lock/unlock agent */
223: int
224: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
225: {
226: int type;
227: Buffer msg;
228:
229: buffer_init(&msg);
230: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
231: buffer_put_cstring(&msg, password);
232:
233: if (ssh_request_reply(auth, &msg, &msg) == 0) {
234: buffer_free(&msg);
235: return 0;
236: }
237: type = buffer_get_char(&msg);
238: buffer_free(&msg);
239: return decode_reply(type);
1.1 deraadt 240: }
241:
1.14 markus 242: /*
243: * Returns the first authentication identity held by the agent.
244: */
1.1 deraadt 245:
1.30 markus 246: int
247: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 248: {
1.25 markus 249: int type, code1 = 0, code2 = 0;
1.24 markus 250: Buffer request;
1.25 markus 251:
1.46 deraadt 252: switch (version) {
1.25 markus 253: case 1:
254: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
255: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
256: break;
257: case 2:
258: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
259: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
260: break;
261: default:
1.30 markus 262: return 0;
1.25 markus 263: }
1.1 deraadt 264:
1.14 markus 265: /*
266: * Send a message to the agent requesting for a list of the
267: * identities it can represent.
268: */
1.24 markus 269: buffer_init(&request);
1.25 markus 270: buffer_put_char(&request, code1);
1.12 markus 271:
272: buffer_clear(&auth->identities);
1.24 markus 273: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
274: buffer_free(&request);
1.30 markus 275: return 0;
1.12 markus 276: }
1.24 markus 277: buffer_free(&request);
1.1 deraadt 278:
1.12 markus 279: /* Get message type, and verify that we got a proper answer. */
1.24 markus 280: type = buffer_get_char(&auth->identities);
1.29 markus 281: if (agent_failed(type)) {
1.30 markus 282: return 0;
1.25 markus 283: } else if (type != code2) {
1.24 markus 284: fatal("Bad authentication reply message type: %d", type);
1.25 markus 285: }
1.12 markus 286:
287: /* Get the number of entries in the response and check it for sanity. */
288: auth->howmany = buffer_get_int(&auth->identities);
1.62 miod 289: if ((u_int)auth->howmany > 1024)
1.37 millert 290: fatal("Too many identities in authentication reply: %d",
1.24 markus 291: auth->howmany);
1.12 markus 292:
1.30 markus 293: return auth->howmany;
294: }
295:
296: Key *
297: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
298: {
299: /* get number of identities and return the first entry (if any). */
300: if (ssh_get_num_identities(auth, version) > 0)
301: return ssh_get_next_identity(auth, comment, version);
302: return NULL;
1.1 deraadt 303: }
304:
1.25 markus 305: Key *
306: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 307: {
1.66 djm 308: int keybits;
1.31 markus 309: u_int bits;
310: u_char *blob;
311: u_int blen;
1.25 markus 312: Key *key = NULL;
1.9 markus 313:
1.12 markus 314: /* Return failure if no more entries. */
315: if (auth->howmany <= 0)
1.25 markus 316: return NULL;
1.12 markus 317:
1.14 markus 318: /*
319: * Get the next entry from the packet. These will abort with a fatal
320: * error if the packet is too short or contains corrupt data.
321: */
1.46 deraadt 322: switch (version) {
1.25 markus 323: case 1:
1.30 markus 324: key = key_new(KEY_RSA1);
1.25 markus 325: bits = buffer_get_int(&auth->identities);
326: buffer_get_bignum(&auth->identities, key->rsa->e);
327: buffer_get_bignum(&auth->identities, key->rsa->n);
328: *comment = buffer_get_string(&auth->identities, NULL);
1.66 djm 329: keybits = BN_num_bits(key->rsa->n);
330: if (keybits < 0 || bits != (u_int)keybits)
1.59 itojun 331: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 332: BN_num_bits(key->rsa->n), bits);
333: break;
334: case 2:
335: blob = buffer_get_string(&auth->identities, &blen);
336: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 337: key = key_from_blob(blob, blen);
1.25 markus 338: xfree(blob);
339: break;
340: default:
341: return NULL;
342: }
1.12 markus 343: /* Decrement the number of remaining entries. */
344: auth->howmany--;
1.25 markus 345: return key;
1.1 deraadt 346: }
347:
1.14 markus 348: /*
349: * Generates a random challenge, sends it to the agent, and waits for
350: * response from the agent. Returns true (non-zero) if the agent gave the
351: * correct answer, zero otherwise. Response type selects the style of
352: * response desired, with 0 corresponding to protocol version 1.0 (no longer
353: * supported) and 1 corresponding to protocol version 1.1.
354: */
1.1 deraadt 355:
1.2 provos 356: int
357: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 358: Key* key, BIGNUM *challenge,
1.31 markus 359: u_char session_id[16],
360: u_int response_type,
361: u_char response[16])
1.1 deraadt 362: {
1.12 markus 363: Buffer buffer;
1.24 markus 364: int success = 0;
365: int i;
366: int type;
1.12 markus 367:
1.30 markus 368: if (key->type != KEY_RSA1)
1.25 markus 369: return 0;
370: if (response_type == 0) {
1.59 itojun 371: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 372: return 0;
373: }
1.12 markus 374: buffer_init(&buffer);
1.24 markus 375: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 376: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
377: buffer_put_bignum(&buffer, key->rsa->e);
378: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 379: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 380: buffer_append(&buffer, session_id, 16);
1.12 markus 381: buffer_put_int(&buffer, response_type);
382:
1.24 markus 383: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 384: buffer_free(&buffer);
385: return 0;
386: }
1.24 markus 387: type = buffer_get_char(&buffer);
1.12 markus 388:
1.29 markus 389: if (agent_failed(type)) {
1.59 itojun 390: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 391: } else if (type != SSH_AGENT_RSA_RESPONSE) {
392: fatal("Bad authentication response: %d", type);
393: } else {
394: success = 1;
395: /*
396: * Get the response from the packet. This will abort with a
397: * fatal error if the packet is corrupt.
398: */
399: for (i = 0; i < 16; i++)
1.73 deraadt 400: response[i] = (u_char)buffer_get_char(&buffer);
1.12 markus 401: }
402: buffer_free(&buffer);
1.24 markus 403: return success;
1.12 markus 404: }
1.1 deraadt 405:
1.25 markus 406: /* ask agent to sign data, returns -1 on error, 0 on success */
407: int
408: ssh_agent_sign(AuthenticationConnection *auth,
409: Key *key,
1.48 markus 410: u_char **sigp, u_int *lenp,
411: u_char *data, u_int datalen)
1.25 markus 412: {
1.28 markus 413: extern int datafellows;
1.25 markus 414: Buffer msg;
1.31 markus 415: u_char *blob;
416: u_int blen;
1.28 markus 417: int type, flags = 0;
1.25 markus 418: int ret = -1;
419:
1.30 markus 420: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 421: return -1;
422:
1.28 markus 423: if (datafellows & SSH_BUG_SIGBLOB)
424: flags = SSH_AGENT_OLD_SIGNATURE;
425:
1.25 markus 426: buffer_init(&msg);
427: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
428: buffer_put_string(&msg, blob, blen);
429: buffer_put_string(&msg, data, datalen);
1.28 markus 430: buffer_put_int(&msg, flags);
1.25 markus 431: xfree(blob);
432:
433: if (ssh_request_reply(auth, &msg, &msg) == 0) {
434: buffer_free(&msg);
435: return -1;
436: }
437: type = buffer_get_char(&msg);
1.29 markus 438: if (agent_failed(type)) {
1.59 itojun 439: logit("Agent admitted failure to sign using the key.");
1.25 markus 440: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
441: fatal("Bad authentication response: %d", type);
442: } else {
443: ret = 0;
444: *sigp = buffer_get_string(&msg, lenp);
445: }
446: buffer_free(&msg);
447: return ret;
448: }
449:
1.22 markus 450: /* Encode key for a message to the agent. */
451:
1.41 itojun 452: static void
1.30 markus 453: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 454: {
455: buffer_put_int(b, BN_num_bits(key->n));
456: buffer_put_bignum(b, key->n);
457: buffer_put_bignum(b, key->e);
458: buffer_put_bignum(b, key->d);
459: /* To keep within the protocol: p < q for ssh. in SSL p > q */
460: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
461: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
462: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 463: buffer_put_cstring(b, comment);
1.22 markus 464: }
465:
1.41 itojun 466: static void
1.30 markus 467: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 468: {
1.30 markus 469: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 470: switch (key->type) {
1.30 markus 471: case KEY_RSA:
472: buffer_put_bignum2(b, key->rsa->n);
473: buffer_put_bignum2(b, key->rsa->e);
474: buffer_put_bignum2(b, key->rsa->d);
475: buffer_put_bignum2(b, key->rsa->iqmp);
476: buffer_put_bignum2(b, key->rsa->p);
477: buffer_put_bignum2(b, key->rsa->q);
478: break;
479: case KEY_DSA:
480: buffer_put_bignum2(b, key->dsa->p);
481: buffer_put_bignum2(b, key->dsa->q);
482: buffer_put_bignum2(b, key->dsa->g);
483: buffer_put_bignum2(b, key->dsa->pub_key);
484: buffer_put_bignum2(b, key->dsa->priv_key);
485: break;
486: }
487: buffer_put_cstring(b, comment);
1.22 markus 488: }
489:
1.14 markus 490: /*
491: * Adds an identity to the authentication server. This call is not meant to
492: * be used by normal applications.
493: */
1.1 deraadt 494:
1.18 markus 495: int
1.54 markus 496: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 497: const char *comment, u_int life, u_int confirm)
1.1 deraadt 498: {
1.25 markus 499: Buffer msg;
1.58 markus 500: int type, constrained = (life || confirm);
1.12 markus 501:
1.25 markus 502: buffer_init(&msg);
1.22 markus 503:
504: switch (key->type) {
1.30 markus 505: case KEY_RSA1:
1.54 markus 506: type = constrained ?
507: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
508: SSH_AGENTC_ADD_RSA_IDENTITY;
509: buffer_put_char(&msg, type);
1.30 markus 510: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
511: break;
1.22 markus 512: case KEY_RSA:
513: case KEY_DSA:
1.54 markus 514: type = constrained ?
515: SSH2_AGENTC_ADD_ID_CONSTRAINED :
516: SSH2_AGENTC_ADD_IDENTITY;
517: buffer_put_char(&msg, type);
1.30 markus 518: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 519: break;
520: default:
1.25 markus 521: buffer_free(&msg);
1.22 markus 522: return 0;
523: }
1.54 markus 524: if (constrained) {
525: if (life != 0) {
526: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
527: buffer_put_int(&msg, life);
528: }
1.58 markus 529: if (confirm != 0)
530: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 531: }
1.25 markus 532: if (ssh_request_reply(auth, &msg, &msg) == 0) {
533: buffer_free(&msg);
1.12 markus 534: return 0;
535: }
1.25 markus 536: type = buffer_get_char(&msg);
537: buffer_free(&msg);
1.24 markus 538: return decode_reply(type);
1.12 markus 539: }
1.1 deraadt 540:
1.54 markus 541: int
542: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
543: {
1.58 markus 544: return ssh_add_identity_constrained(auth, key, comment, 0, 0);
1.54 markus 545: }
546:
1.14 markus 547: /*
548: * Removes an identity from the authentication server. This call is not
549: * meant to be used by normal applications.
550: */
1.1 deraadt 551:
1.18 markus 552: int
1.25 markus 553: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 554: {
1.25 markus 555: Buffer msg;
1.24 markus 556: int type;
1.31 markus 557: u_char *blob;
558: u_int blen;
1.12 markus 559:
1.25 markus 560: buffer_init(&msg);
1.12 markus 561:
1.30 markus 562: if (key->type == KEY_RSA1) {
1.25 markus 563: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
564: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
565: buffer_put_bignum(&msg, key->rsa->e);
566: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 567: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
568: key_to_blob(key, &blob, &blen);
1.25 markus 569: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 570: buffer_put_string(&msg, blob, blen);
571: xfree(blob);
572: } else {
573: buffer_free(&msg);
574: return 0;
575: }
1.42 markus 576: if (ssh_request_reply(auth, &msg, &msg) == 0) {
577: buffer_free(&msg);
578: return 0;
579: }
580: type = buffer_get_char(&msg);
581: buffer_free(&msg);
582: return decode_reply(type);
583: }
584:
585: int
1.63 djm 586: ssh_update_card(AuthenticationConnection *auth, int add,
1.60 djm 587: const char *reader_id, const char *pin, u_int life, u_int confirm)
1.42 markus 588: {
589: Buffer msg;
1.60 djm 590: int type, constrained = (life || confirm);
591:
592: if (add) {
593: type = constrained ?
594: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
595: SSH_AGENTC_ADD_SMARTCARD_KEY;
596: } else
597: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 598:
599: buffer_init(&msg);
1.60 djm 600: buffer_put_char(&msg, type);
1.43 markus 601: buffer_put_cstring(&msg, reader_id);
1.49 rees 602: buffer_put_cstring(&msg, pin);
1.63 djm 603:
1.60 djm 604: if (constrained) {
605: if (life != 0) {
606: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
607: buffer_put_int(&msg, life);
608: }
609: if (confirm != 0)
610: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
611: }
612:
1.25 markus 613: if (ssh_request_reply(auth, &msg, &msg) == 0) {
614: buffer_free(&msg);
1.12 markus 615: return 0;
616: }
1.25 markus 617: type = buffer_get_char(&msg);
618: buffer_free(&msg);
1.24 markus 619: return decode_reply(type);
1.12 markus 620: }
621:
1.14 markus 622: /*
623: * Removes all identities from the agent. This call is not meant to be used
624: * by normal applications.
625: */
1.1 deraadt 626:
1.18 markus 627: int
1.25 markus 628: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 629: {
1.25 markus 630: Buffer msg;
1.24 markus 631: int type;
1.25 markus 632: int code = (version==1) ?
633: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
634: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 635:
1.25 markus 636: buffer_init(&msg);
637: buffer_put_char(&msg, code);
1.12 markus 638:
1.25 markus 639: if (ssh_request_reply(auth, &msg, &msg) == 0) {
640: buffer_free(&msg);
1.12 markus 641: return 0;
642: }
1.25 markus 643: type = buffer_get_char(&msg);
644: buffer_free(&msg);
1.24 markus 645: return decode_reply(type);
1.21 markus 646: }
647:
1.35 stevesk 648: int
1.24 markus 649: decode_reply(int type)
1.21 markus 650: {
1.12 markus 651: switch (type) {
652: case SSH_AGENT_FAILURE:
1.29 markus 653: case SSH_COM_AGENT2_FAILURE:
1.44 markus 654: case SSH2_AGENT_FAILURE:
1.59 itojun 655: logit("SSH_AGENT_FAILURE");
1.12 markus 656: return 0;
657: case SSH_AGENT_SUCCESS:
658: return 1;
659: default:
1.21 markus 660: fatal("Bad response from authentication agent: %d", type);
1.12 markus 661: }
662: /* NOTREACHED */
663: return 0;
664: }
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