Annotation of src/usr.bin/ssh/authfd.c, Revision 1.78
1.78 ! stevesk 1: /* $OpenBSD: authfd.c,v 1.77 2006/07/17 01:31:09 stevesk 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>
1.76 stevesk 45:
46: #include <fcntl.h>
1.78 ! stevesk 47: #include <string.h>
1.77 stevesk 48: #include <unistd.h>
1.1 deraadt 49:
50: #include "ssh.h"
51: #include "rsa.h"
52: #include "buffer.h"
53: #include "bufaux.h"
54: #include "xmalloc.h"
1.22 markus 55: #include "key.h"
56: #include "authfd.h"
1.33 markus 57: #include "cipher.h"
1.22 markus 58: #include "kex.h"
1.28 markus 59: #include "compat.h"
1.33 markus 60: #include "log.h"
61: #include "atomicio.h"
1.74 djm 62: #include "misc.h"
1.2 provos 63:
1.57 stevesk 64: static int agent_present = 0;
65:
1.21 markus 66: /* helper */
1.24 markus 67: int decode_reply(int type);
1.21 markus 68:
1.29 markus 69: /* macro to check for "agent failure" message */
70: #define agent_failed(x) \
1.44 markus 71: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 72: (x == SSH2_AGENT_FAILURE))
1.29 markus 73:
1.57 stevesk 74: int
75: ssh_agent_present(void)
76: {
77: int authfd;
78:
79: if (agent_present)
80: return 1;
81: if ((authfd = ssh_get_authentication_socket()) == -1)
82: return 0;
83: else {
84: ssh_close_authentication_socket(authfd);
85: return 1;
86: }
87: }
88:
1.1 deraadt 89: /* Returns the number of the authentication fd, or -1 if there is none. */
90:
1.2 provos 91: int
1.32 markus 92: ssh_get_authentication_socket(void)
1.1 deraadt 93: {
1.12 markus 94: const char *authsocket;
1.45 stevesk 95: int sock;
1.12 markus 96: struct sockaddr_un sunaddr;
97:
98: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
99: if (!authsocket)
100: return -1;
101:
102: sunaddr.sun_family = AF_UNIX;
103: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
104:
105: sock = socket(AF_UNIX, SOCK_STREAM, 0);
106: if (sock < 0)
107: return -1;
108:
109: /* close on exec */
110: if (fcntl(sock, F_SETFD, 1) == -1) {
111: close(sock);
112: return -1;
113: }
1.71 deraadt 114: if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) {
1.12 markus 115: close(sock);
116: return -1;
117: }
1.57 stevesk 118: agent_present = 1;
1.12 markus 119: return sock;
1.1 deraadt 120: }
121:
1.41 itojun 122: static int
1.25 markus 123: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 124: {
1.66 djm 125: u_int l, len;
1.24 markus 126: char buf[1024];
127:
128: /* Get the length of the message, and format it in the buffer. */
129: len = buffer_len(request);
1.74 djm 130: put_u32(buf, len);
1.24 markus 131:
132: /* Send the length and then the packet to the agent. */
1.61 deraadt 133: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
134: atomicio(vwrite, auth->fd, buffer_ptr(request),
1.24 markus 135: buffer_len(request)) != buffer_len(request)) {
136: error("Error writing to authentication socket.");
137: return 0;
138: }
139: /*
140: * Wait for response from the agent. First read the length of the
141: * response packet.
142: */
1.64 avsm 143: if (atomicio(read, auth->fd, buf, 4) != 4) {
144: error("Error reading response length from authentication socket.");
145: return 0;
1.24 markus 146: }
147:
148: /* Extract the length, and check it for sanity. */
1.74 djm 149: len = get_u32(buf);
1.24 markus 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);
1.65 avsm 159: if (atomicio(read, auth->fd, buf, l) != l) {
1.24 markus 160: error("Error reading response from authentication socket.");
161: return 0;
162: }
1.56 markus 163: buffer_append(reply, buf, l);
1.24 markus 164: len -= l;
165: }
166: return 1;
167: }
168:
1.14 markus 169: /*
170: * Closes the agent socket if it should be closed (depends on how it was
171: * obtained). The argument must have been returned by
172: * ssh_get_authentication_socket().
173: */
1.1 deraadt 174:
1.18 markus 175: void
1.12 markus 176: ssh_close_authentication_socket(int sock)
1.1 deraadt 177: {
1.12 markus 178: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
179: close(sock);
1.1 deraadt 180: }
181:
1.14 markus 182: /*
183: * Opens and connects a private socket for communication with the
184: * authentication agent. Returns the file descriptor (which must be
185: * shut down and closed by the caller when no longer needed).
186: * Returns NULL if an error occurred and the connection could not be
187: * opened.
188: */
1.1 deraadt 189:
1.12 markus 190: AuthenticationConnection *
1.32 markus 191: ssh_get_authentication_connection(void)
1.1 deraadt 192: {
1.12 markus 193: AuthenticationConnection *auth;
194: int sock;
1.1 deraadt 195:
1.12 markus 196: sock = ssh_get_authentication_socket();
197:
1.14 markus 198: /*
199: * Fail if we couldn't obtain a connection. This happens if we
200: * exited due to a timeout.
201: */
1.12 markus 202: if (sock < 0)
203: return NULL;
204:
205: auth = xmalloc(sizeof(*auth));
206: auth->fd = sock;
207: buffer_init(&auth->identities);
208: auth->howmany = 0;
209:
210: return auth;
1.1 deraadt 211: }
212:
1.14 markus 213: /*
214: * Closes the connection to the authentication agent and frees any associated
215: * memory.
216: */
1.1 deraadt 217:
1.18 markus 218: void
1.25 markus 219: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 220: {
1.25 markus 221: buffer_free(&auth->identities);
222: close(auth->fd);
223: xfree(auth);
1.50 markus 224: }
225:
226: /* Lock/unlock agent */
227: int
228: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
229: {
230: int type;
231: Buffer msg;
232:
233: buffer_init(&msg);
234: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
235: buffer_put_cstring(&msg, password);
236:
237: if (ssh_request_reply(auth, &msg, &msg) == 0) {
238: buffer_free(&msg);
239: return 0;
240: }
241: type = buffer_get_char(&msg);
242: buffer_free(&msg);
243: return decode_reply(type);
1.1 deraadt 244: }
245:
1.14 markus 246: /*
247: * Returns the first authentication identity held by the agent.
248: */
1.1 deraadt 249:
1.30 markus 250: int
251: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 252: {
1.25 markus 253: int type, code1 = 0, code2 = 0;
1.24 markus 254: Buffer request;
1.25 markus 255:
1.46 deraadt 256: switch (version) {
1.25 markus 257: case 1:
258: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
259: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
260: break;
261: case 2:
262: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
263: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
264: break;
265: default:
1.30 markus 266: return 0;
1.25 markus 267: }
1.1 deraadt 268:
1.14 markus 269: /*
270: * Send a message to the agent requesting for a list of the
271: * identities it can represent.
272: */
1.24 markus 273: buffer_init(&request);
1.25 markus 274: buffer_put_char(&request, code1);
1.12 markus 275:
276: buffer_clear(&auth->identities);
1.24 markus 277: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
278: buffer_free(&request);
1.30 markus 279: return 0;
1.12 markus 280: }
1.24 markus 281: buffer_free(&request);
1.1 deraadt 282:
1.12 markus 283: /* Get message type, and verify that we got a proper answer. */
1.24 markus 284: type = buffer_get_char(&auth->identities);
1.29 markus 285: if (agent_failed(type)) {
1.30 markus 286: return 0;
1.25 markus 287: } else if (type != code2) {
1.24 markus 288: fatal("Bad authentication reply message type: %d", type);
1.25 markus 289: }
1.12 markus 290:
291: /* Get the number of entries in the response and check it for sanity. */
292: auth->howmany = buffer_get_int(&auth->identities);
1.62 miod 293: if ((u_int)auth->howmany > 1024)
1.37 millert 294: fatal("Too many identities in authentication reply: %d",
1.24 markus 295: auth->howmany);
1.12 markus 296:
1.30 markus 297: return auth->howmany;
298: }
299:
300: Key *
301: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
302: {
303: /* get number of identities and return the first entry (if any). */
304: if (ssh_get_num_identities(auth, version) > 0)
305: return ssh_get_next_identity(auth, comment, version);
306: return NULL;
1.1 deraadt 307: }
308:
1.25 markus 309: Key *
310: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 311: {
1.66 djm 312: int keybits;
1.31 markus 313: u_int bits;
314: u_char *blob;
315: u_int blen;
1.25 markus 316: Key *key = NULL;
1.9 markus 317:
1.12 markus 318: /* Return failure if no more entries. */
319: if (auth->howmany <= 0)
1.25 markus 320: return NULL;
1.12 markus 321:
1.14 markus 322: /*
323: * Get the next entry from the packet. These will abort with a fatal
324: * error if the packet is too short or contains corrupt data.
325: */
1.46 deraadt 326: switch (version) {
1.25 markus 327: case 1:
1.30 markus 328: key = key_new(KEY_RSA1);
1.25 markus 329: bits = buffer_get_int(&auth->identities);
330: buffer_get_bignum(&auth->identities, key->rsa->e);
331: buffer_get_bignum(&auth->identities, key->rsa->n);
332: *comment = buffer_get_string(&auth->identities, NULL);
1.66 djm 333: keybits = BN_num_bits(key->rsa->n);
334: if (keybits < 0 || bits != (u_int)keybits)
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: }
1.12 markus 347: /* Decrement the number of remaining entries. */
348: auth->howmany--;
1.25 markus 349: return key;
1.1 deraadt 350: }
351:
1.14 markus 352: /*
353: * Generates a random challenge, sends it to the agent, and waits for
354: * response from the agent. Returns true (non-zero) if the agent gave the
355: * correct answer, zero otherwise. Response type selects the style of
356: * response desired, with 0 corresponding to protocol version 1.0 (no longer
357: * supported) and 1 corresponding to protocol version 1.1.
358: */
1.1 deraadt 359:
1.2 provos 360: int
361: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 362: Key* key, BIGNUM *challenge,
1.31 markus 363: u_char session_id[16],
364: u_int response_type,
365: u_char response[16])
1.1 deraadt 366: {
1.12 markus 367: Buffer buffer;
1.24 markus 368: int success = 0;
369: int i;
370: int type;
1.12 markus 371:
1.30 markus 372: if (key->type != KEY_RSA1)
1.25 markus 373: return 0;
374: if (response_type == 0) {
1.59 itojun 375: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 376: return 0;
377: }
1.12 markus 378: buffer_init(&buffer);
1.24 markus 379: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 380: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
381: buffer_put_bignum(&buffer, key->rsa->e);
382: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 383: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 384: buffer_append(&buffer, session_id, 16);
1.12 markus 385: buffer_put_int(&buffer, response_type);
386:
1.24 markus 387: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 388: buffer_free(&buffer);
389: return 0;
390: }
1.24 markus 391: type = buffer_get_char(&buffer);
1.12 markus 392:
1.29 markus 393: if (agent_failed(type)) {
1.59 itojun 394: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 395: } else if (type != SSH_AGENT_RSA_RESPONSE) {
396: fatal("Bad authentication response: %d", type);
397: } else {
398: success = 1;
399: /*
400: * Get the response from the packet. This will abort with a
401: * fatal error if the packet is corrupt.
402: */
403: for (i = 0; i < 16; i++)
1.73 deraadt 404: response[i] = (u_char)buffer_get_char(&buffer);
1.12 markus 405: }
406: buffer_free(&buffer);
1.24 markus 407: return success;
1.12 markus 408: }
1.1 deraadt 409:
1.25 markus 410: /* ask agent to sign data, returns -1 on error, 0 on success */
411: int
412: ssh_agent_sign(AuthenticationConnection *auth,
413: Key *key,
1.48 markus 414: u_char **sigp, u_int *lenp,
415: u_char *data, u_int datalen)
1.25 markus 416: {
1.28 markus 417: extern int datafellows;
1.25 markus 418: Buffer msg;
1.31 markus 419: u_char *blob;
420: u_int blen;
1.28 markus 421: int type, flags = 0;
1.25 markus 422: int ret = -1;
423:
1.30 markus 424: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 425: return -1;
426:
1.28 markus 427: if (datafellows & SSH_BUG_SIGBLOB)
428: flags = SSH_AGENT_OLD_SIGNATURE;
429:
1.25 markus 430: buffer_init(&msg);
431: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
432: buffer_put_string(&msg, blob, blen);
433: buffer_put_string(&msg, data, datalen);
1.28 markus 434: buffer_put_int(&msg, flags);
1.25 markus 435: xfree(blob);
436:
437: if (ssh_request_reply(auth, &msg, &msg) == 0) {
438: buffer_free(&msg);
439: return -1;
440: }
441: type = buffer_get_char(&msg);
1.29 markus 442: if (agent_failed(type)) {
1.59 itojun 443: logit("Agent admitted failure to sign using the key.");
1.25 markus 444: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
445: fatal("Bad authentication response: %d", type);
446: } else {
447: ret = 0;
448: *sigp = buffer_get_string(&msg, lenp);
449: }
450: buffer_free(&msg);
451: return ret;
452: }
453:
1.22 markus 454: /* Encode key for a message to the agent. */
455:
1.41 itojun 456: static void
1.30 markus 457: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 458: {
459: buffer_put_int(b, BN_num_bits(key->n));
460: buffer_put_bignum(b, key->n);
461: buffer_put_bignum(b, key->e);
462: buffer_put_bignum(b, key->d);
463: /* To keep within the protocol: p < q for ssh. in SSL p > q */
464: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
465: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
466: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 467: buffer_put_cstring(b, comment);
1.22 markus 468: }
469:
1.41 itojun 470: static void
1.30 markus 471: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 472: {
1.30 markus 473: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 474: switch (key->type) {
1.30 markus 475: case KEY_RSA:
476: buffer_put_bignum2(b, key->rsa->n);
477: buffer_put_bignum2(b, key->rsa->e);
478: buffer_put_bignum2(b, key->rsa->d);
479: buffer_put_bignum2(b, key->rsa->iqmp);
480: buffer_put_bignum2(b, key->rsa->p);
481: buffer_put_bignum2(b, key->rsa->q);
482: break;
483: case KEY_DSA:
484: buffer_put_bignum2(b, key->dsa->p);
485: buffer_put_bignum2(b, key->dsa->q);
486: buffer_put_bignum2(b, key->dsa->g);
487: buffer_put_bignum2(b, key->dsa->pub_key);
488: buffer_put_bignum2(b, key->dsa->priv_key);
489: break;
490: }
491: buffer_put_cstring(b, comment);
1.22 markus 492: }
493:
1.14 markus 494: /*
495: * Adds an identity to the authentication server. This call is not meant to
496: * be used by normal applications.
497: */
1.1 deraadt 498:
1.18 markus 499: int
1.54 markus 500: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 501: const char *comment, u_int life, u_int confirm)
1.1 deraadt 502: {
1.25 markus 503: Buffer msg;
1.58 markus 504: int type, constrained = (life || confirm);
1.12 markus 505:
1.25 markus 506: buffer_init(&msg);
1.22 markus 507:
508: switch (key->type) {
1.30 markus 509: case KEY_RSA1:
1.54 markus 510: type = constrained ?
511: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
512: SSH_AGENTC_ADD_RSA_IDENTITY;
513: buffer_put_char(&msg, type);
1.30 markus 514: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
515: break;
1.22 markus 516: case KEY_RSA:
517: case KEY_DSA:
1.54 markus 518: type = constrained ?
519: SSH2_AGENTC_ADD_ID_CONSTRAINED :
520: SSH2_AGENTC_ADD_IDENTITY;
521: buffer_put_char(&msg, type);
1.30 markus 522: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 523: break;
524: default:
1.25 markus 525: buffer_free(&msg);
1.22 markus 526: return 0;
527: }
1.54 markus 528: if (constrained) {
529: if (life != 0) {
530: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
531: buffer_put_int(&msg, life);
532: }
1.58 markus 533: if (confirm != 0)
534: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 535: }
1.25 markus 536: if (ssh_request_reply(auth, &msg, &msg) == 0) {
537: buffer_free(&msg);
1.12 markus 538: return 0;
539: }
1.25 markus 540: type = buffer_get_char(&msg);
541: buffer_free(&msg);
1.24 markus 542: return decode_reply(type);
1.12 markus 543: }
1.1 deraadt 544:
1.54 markus 545: int
546: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
547: {
1.58 markus 548: return ssh_add_identity_constrained(auth, key, comment, 0, 0);
1.54 markus 549: }
550:
1.14 markus 551: /*
552: * Removes an identity from the authentication server. This call is not
553: * meant to be used by normal applications.
554: */
1.1 deraadt 555:
1.18 markus 556: int
1.25 markus 557: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 558: {
1.25 markus 559: Buffer msg;
1.24 markus 560: int type;
1.31 markus 561: u_char *blob;
562: u_int blen;
1.12 markus 563:
1.25 markus 564: buffer_init(&msg);
1.12 markus 565:
1.30 markus 566: if (key->type == KEY_RSA1) {
1.25 markus 567: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
568: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
569: buffer_put_bignum(&msg, key->rsa->e);
570: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 571: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
572: key_to_blob(key, &blob, &blen);
1.25 markus 573: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 574: buffer_put_string(&msg, blob, blen);
575: xfree(blob);
576: } else {
577: buffer_free(&msg);
578: return 0;
579: }
1.42 markus 580: if (ssh_request_reply(auth, &msg, &msg) == 0) {
581: buffer_free(&msg);
582: return 0;
583: }
584: type = buffer_get_char(&msg);
585: buffer_free(&msg);
586: return decode_reply(type);
587: }
588:
589: int
1.63 djm 590: ssh_update_card(AuthenticationConnection *auth, int add,
1.60 djm 591: const char *reader_id, const char *pin, u_int life, u_int confirm)
1.42 markus 592: {
593: Buffer msg;
1.60 djm 594: int type, constrained = (life || confirm);
595:
596: if (add) {
597: type = constrained ?
598: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
599: SSH_AGENTC_ADD_SMARTCARD_KEY;
600: } else
601: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 602:
603: buffer_init(&msg);
1.60 djm 604: buffer_put_char(&msg, type);
1.43 markus 605: buffer_put_cstring(&msg, reader_id);
1.49 rees 606: buffer_put_cstring(&msg, pin);
1.63 djm 607:
1.60 djm 608: if (constrained) {
609: if (life != 0) {
610: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
611: buffer_put_int(&msg, life);
612: }
613: if (confirm != 0)
614: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
615: }
616:
1.25 markus 617: if (ssh_request_reply(auth, &msg, &msg) == 0) {
618: buffer_free(&msg);
1.12 markus 619: return 0;
620: }
1.25 markus 621: type = buffer_get_char(&msg);
622: buffer_free(&msg);
1.24 markus 623: return decode_reply(type);
1.12 markus 624: }
625:
1.14 markus 626: /*
627: * Removes all identities from the agent. This call is not meant to be used
628: * by normal applications.
629: */
1.1 deraadt 630:
1.18 markus 631: int
1.25 markus 632: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 633: {
1.25 markus 634: Buffer msg;
1.24 markus 635: int type;
1.25 markus 636: int code = (version==1) ?
637: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
638: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 639:
1.25 markus 640: buffer_init(&msg);
641: buffer_put_char(&msg, code);
1.12 markus 642:
1.25 markus 643: if (ssh_request_reply(auth, &msg, &msg) == 0) {
644: buffer_free(&msg);
1.12 markus 645: return 0;
646: }
1.25 markus 647: type = buffer_get_char(&msg);
648: buffer_free(&msg);
1.24 markus 649: return decode_reply(type);
1.21 markus 650: }
651:
1.35 stevesk 652: int
1.24 markus 653: decode_reply(int type)
1.21 markus 654: {
1.12 markus 655: switch (type) {
656: case SSH_AGENT_FAILURE:
1.29 markus 657: case SSH_COM_AGENT2_FAILURE:
1.44 markus 658: case SSH2_AGENT_FAILURE:
1.59 itojun 659: logit("SSH_AGENT_FAILURE");
1.12 markus 660: return 0;
661: case SSH_AGENT_SUCCESS:
662: return 1;
663: default:
1.21 markus 664: fatal("Bad response from authentication agent: %d", type);
1.12 markus 665: }
666: /* NOTREACHED */
667: return 0;
668: }
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