Annotation of src/usr.bin/ssh/authfd.c, Revision 1.76
1.76 ! stevesk 1: /* $OpenBSD: authfd.c,v 1.75 2006/07/08 21:47:12 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>
1.1 deraadt 47:
48: #include "ssh.h"
49: #include "rsa.h"
50: #include "buffer.h"
51: #include "bufaux.h"
52: #include "xmalloc.h"
1.22 markus 53: #include "key.h"
54: #include "authfd.h"
1.33 markus 55: #include "cipher.h"
1.22 markus 56: #include "kex.h"
1.28 markus 57: #include "compat.h"
1.33 markus 58: #include "log.h"
59: #include "atomicio.h"
1.74 djm 60: #include "misc.h"
1.2 provos 61:
1.57 stevesk 62: static int agent_present = 0;
63:
1.21 markus 64: /* helper */
1.24 markus 65: int decode_reply(int type);
1.21 markus 66:
1.29 markus 67: /* macro to check for "agent failure" message */
68: #define agent_failed(x) \
1.44 markus 69: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 70: (x == SSH2_AGENT_FAILURE))
1.29 markus 71:
1.57 stevesk 72: int
73: ssh_agent_present(void)
74: {
75: int authfd;
76:
77: if (agent_present)
78: return 1;
79: if ((authfd = ssh_get_authentication_socket()) == -1)
80: return 0;
81: else {
82: ssh_close_authentication_socket(authfd);
83: return 1;
84: }
85: }
86:
1.1 deraadt 87: /* Returns the number of the authentication fd, or -1 if there is none. */
88:
1.2 provos 89: int
1.32 markus 90: ssh_get_authentication_socket(void)
1.1 deraadt 91: {
1.12 markus 92: const char *authsocket;
1.45 stevesk 93: int sock;
1.12 markus 94: struct sockaddr_un sunaddr;
95:
96: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
97: if (!authsocket)
98: return -1;
99:
100: sunaddr.sun_family = AF_UNIX;
101: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
102:
103: sock = socket(AF_UNIX, SOCK_STREAM, 0);
104: if (sock < 0)
105: return -1;
106:
107: /* close on exec */
108: if (fcntl(sock, F_SETFD, 1) == -1) {
109: close(sock);
110: return -1;
111: }
1.71 deraadt 112: if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) {
1.12 markus 113: close(sock);
114: return -1;
115: }
1.57 stevesk 116: agent_present = 1;
1.12 markus 117: return sock;
1.1 deraadt 118: }
119:
1.41 itojun 120: static int
1.25 markus 121: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 122: {
1.66 djm 123: u_int l, len;
1.24 markus 124: char buf[1024];
125:
126: /* Get the length of the message, and format it in the buffer. */
127: len = buffer_len(request);
1.74 djm 128: put_u32(buf, len);
1.24 markus 129:
130: /* Send the length and then the packet to the agent. */
1.61 deraadt 131: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
132: atomicio(vwrite, auth->fd, buffer_ptr(request),
1.24 markus 133: buffer_len(request)) != buffer_len(request)) {
134: error("Error writing to authentication socket.");
135: return 0;
136: }
137: /*
138: * Wait for response from the agent. First read the length of the
139: * response packet.
140: */
1.64 avsm 141: if (atomicio(read, auth->fd, buf, 4) != 4) {
142: error("Error reading response length from authentication socket.");
143: return 0;
1.24 markus 144: }
145:
146: /* Extract the length, and check it for sanity. */
1.74 djm 147: len = get_u32(buf);
1.24 markus 148: if (len > 256 * 1024)
1.62 miod 149: fatal("Authentication response too long: %u", len);
1.24 markus 150:
151: /* Read the rest of the response in to the buffer. */
152: buffer_clear(reply);
153: while (len > 0) {
154: l = len;
155: if (l > sizeof(buf))
156: l = sizeof(buf);
1.65 avsm 157: if (atomicio(read, auth->fd, buf, l) != l) {
1.24 markus 158: error("Error reading response from authentication socket.");
159: return 0;
160: }
1.56 markus 161: buffer_append(reply, buf, l);
1.24 markus 162: len -= l;
163: }
164: return 1;
165: }
166:
1.14 markus 167: /*
168: * Closes the agent socket if it should be closed (depends on how it was
169: * obtained). The argument must have been returned by
170: * ssh_get_authentication_socket().
171: */
1.1 deraadt 172:
1.18 markus 173: void
1.12 markus 174: ssh_close_authentication_socket(int sock)
1.1 deraadt 175: {
1.12 markus 176: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
177: close(sock);
1.1 deraadt 178: }
179:
1.14 markus 180: /*
181: * Opens and connects a private socket for communication with the
182: * authentication agent. Returns the file descriptor (which must be
183: * shut down and closed by the caller when no longer needed).
184: * Returns NULL if an error occurred and the connection could not be
185: * opened.
186: */
1.1 deraadt 187:
1.12 markus 188: AuthenticationConnection *
1.32 markus 189: ssh_get_authentication_connection(void)
1.1 deraadt 190: {
1.12 markus 191: AuthenticationConnection *auth;
192: int sock;
1.1 deraadt 193:
1.12 markus 194: sock = ssh_get_authentication_socket();
195:
1.14 markus 196: /*
197: * Fail if we couldn't obtain a connection. This happens if we
198: * exited due to a timeout.
199: */
1.12 markus 200: if (sock < 0)
201: return NULL;
202:
203: auth = xmalloc(sizeof(*auth));
204: auth->fd = sock;
205: buffer_init(&auth->identities);
206: auth->howmany = 0;
207:
208: return auth;
1.1 deraadt 209: }
210:
1.14 markus 211: /*
212: * Closes the connection to the authentication agent and frees any associated
213: * memory.
214: */
1.1 deraadt 215:
1.18 markus 216: void
1.25 markus 217: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 218: {
1.25 markus 219: buffer_free(&auth->identities);
220: close(auth->fd);
221: xfree(auth);
1.50 markus 222: }
223:
224: /* Lock/unlock agent */
225: int
226: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
227: {
228: int type;
229: Buffer msg;
230:
231: buffer_init(&msg);
232: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
233: buffer_put_cstring(&msg, password);
234:
235: if (ssh_request_reply(auth, &msg, &msg) == 0) {
236: buffer_free(&msg);
237: return 0;
238: }
239: type = buffer_get_char(&msg);
240: buffer_free(&msg);
241: return decode_reply(type);
1.1 deraadt 242: }
243:
1.14 markus 244: /*
245: * Returns the first authentication identity held by the agent.
246: */
1.1 deraadt 247:
1.30 markus 248: int
249: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 250: {
1.25 markus 251: int type, code1 = 0, code2 = 0;
1.24 markus 252: Buffer request;
1.25 markus 253:
1.46 deraadt 254: switch (version) {
1.25 markus 255: case 1:
256: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
257: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
258: break;
259: case 2:
260: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
261: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
262: break;
263: default:
1.30 markus 264: return 0;
1.25 markus 265: }
1.1 deraadt 266:
1.14 markus 267: /*
268: * Send a message to the agent requesting for a list of the
269: * identities it can represent.
270: */
1.24 markus 271: buffer_init(&request);
1.25 markus 272: buffer_put_char(&request, code1);
1.12 markus 273:
274: buffer_clear(&auth->identities);
1.24 markus 275: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
276: buffer_free(&request);
1.30 markus 277: return 0;
1.12 markus 278: }
1.24 markus 279: buffer_free(&request);
1.1 deraadt 280:
1.12 markus 281: /* Get message type, and verify that we got a proper answer. */
1.24 markus 282: type = buffer_get_char(&auth->identities);
1.29 markus 283: if (agent_failed(type)) {
1.30 markus 284: return 0;
1.25 markus 285: } else if (type != code2) {
1.24 markus 286: fatal("Bad authentication reply message type: %d", type);
1.25 markus 287: }
1.12 markus 288:
289: /* Get the number of entries in the response and check it for sanity. */
290: auth->howmany = buffer_get_int(&auth->identities);
1.62 miod 291: if ((u_int)auth->howmany > 1024)
1.37 millert 292: fatal("Too many identities in authentication reply: %d",
1.24 markus 293: auth->howmany);
1.12 markus 294:
1.30 markus 295: return auth->howmany;
296: }
297:
298: Key *
299: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
300: {
301: /* get number of identities and return the first entry (if any). */
302: if (ssh_get_num_identities(auth, version) > 0)
303: return ssh_get_next_identity(auth, comment, version);
304: return NULL;
1.1 deraadt 305: }
306:
1.25 markus 307: Key *
308: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 309: {
1.66 djm 310: int keybits;
1.31 markus 311: u_int bits;
312: u_char *blob;
313: u_int blen;
1.25 markus 314: Key *key = NULL;
1.9 markus 315:
1.12 markus 316: /* Return failure if no more entries. */
317: if (auth->howmany <= 0)
1.25 markus 318: return NULL;
1.12 markus 319:
1.14 markus 320: /*
321: * Get the next entry from the packet. These will abort with a fatal
322: * error if the packet is too short or contains corrupt data.
323: */
1.46 deraadt 324: switch (version) {
1.25 markus 325: case 1:
1.30 markus 326: key = key_new(KEY_RSA1);
1.25 markus 327: bits = buffer_get_int(&auth->identities);
328: buffer_get_bignum(&auth->identities, key->rsa->e);
329: buffer_get_bignum(&auth->identities, key->rsa->n);
330: *comment = buffer_get_string(&auth->identities, NULL);
1.66 djm 331: keybits = BN_num_bits(key->rsa->n);
332: if (keybits < 0 || bits != (u_int)keybits)
1.59 itojun 333: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 334: BN_num_bits(key->rsa->n), bits);
335: break;
336: case 2:
337: blob = buffer_get_string(&auth->identities, &blen);
338: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 339: key = key_from_blob(blob, blen);
1.25 markus 340: xfree(blob);
341: break;
342: default:
343: return NULL;
344: }
1.12 markus 345: /* Decrement the number of remaining entries. */
346: auth->howmany--;
1.25 markus 347: return key;
1.1 deraadt 348: }
349:
1.14 markus 350: /*
351: * Generates a random challenge, sends it to the agent, and waits for
352: * response from the agent. Returns true (non-zero) if the agent gave the
353: * correct answer, zero otherwise. Response type selects the style of
354: * response desired, with 0 corresponding to protocol version 1.0 (no longer
355: * supported) and 1 corresponding to protocol version 1.1.
356: */
1.1 deraadt 357:
1.2 provos 358: int
359: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 360: Key* key, BIGNUM *challenge,
1.31 markus 361: u_char session_id[16],
362: u_int response_type,
363: u_char response[16])
1.1 deraadt 364: {
1.12 markus 365: Buffer buffer;
1.24 markus 366: int success = 0;
367: int i;
368: int type;
1.12 markus 369:
1.30 markus 370: if (key->type != KEY_RSA1)
1.25 markus 371: return 0;
372: if (response_type == 0) {
1.59 itojun 373: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 374: return 0;
375: }
1.12 markus 376: buffer_init(&buffer);
1.24 markus 377: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 378: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
379: buffer_put_bignum(&buffer, key->rsa->e);
380: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 381: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 382: buffer_append(&buffer, session_id, 16);
1.12 markus 383: buffer_put_int(&buffer, response_type);
384:
1.24 markus 385: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 386: buffer_free(&buffer);
387: return 0;
388: }
1.24 markus 389: type = buffer_get_char(&buffer);
1.12 markus 390:
1.29 markus 391: if (agent_failed(type)) {
1.59 itojun 392: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 393: } else if (type != SSH_AGENT_RSA_RESPONSE) {
394: fatal("Bad authentication response: %d", type);
395: } else {
396: success = 1;
397: /*
398: * Get the response from the packet. This will abort with a
399: * fatal error if the packet is corrupt.
400: */
401: for (i = 0; i < 16; i++)
1.73 deraadt 402: response[i] = (u_char)buffer_get_char(&buffer);
1.12 markus 403: }
404: buffer_free(&buffer);
1.24 markus 405: return success;
1.12 markus 406: }
1.1 deraadt 407:
1.25 markus 408: /* ask agent to sign data, returns -1 on error, 0 on success */
409: int
410: ssh_agent_sign(AuthenticationConnection *auth,
411: Key *key,
1.48 markus 412: u_char **sigp, u_int *lenp,
413: u_char *data, u_int datalen)
1.25 markus 414: {
1.28 markus 415: extern int datafellows;
1.25 markus 416: Buffer msg;
1.31 markus 417: u_char *blob;
418: u_int blen;
1.28 markus 419: int type, flags = 0;
1.25 markus 420: int ret = -1;
421:
1.30 markus 422: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 423: return -1;
424:
1.28 markus 425: if (datafellows & SSH_BUG_SIGBLOB)
426: flags = SSH_AGENT_OLD_SIGNATURE;
427:
1.25 markus 428: buffer_init(&msg);
429: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
430: buffer_put_string(&msg, blob, blen);
431: buffer_put_string(&msg, data, datalen);
1.28 markus 432: buffer_put_int(&msg, flags);
1.25 markus 433: xfree(blob);
434:
435: if (ssh_request_reply(auth, &msg, &msg) == 0) {
436: buffer_free(&msg);
437: return -1;
438: }
439: type = buffer_get_char(&msg);
1.29 markus 440: if (agent_failed(type)) {
1.59 itojun 441: logit("Agent admitted failure to sign using the key.");
1.25 markus 442: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
443: fatal("Bad authentication response: %d", type);
444: } else {
445: ret = 0;
446: *sigp = buffer_get_string(&msg, lenp);
447: }
448: buffer_free(&msg);
449: return ret;
450: }
451:
1.22 markus 452: /* Encode key for a message to the agent. */
453:
1.41 itojun 454: static void
1.30 markus 455: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 456: {
457: buffer_put_int(b, BN_num_bits(key->n));
458: buffer_put_bignum(b, key->n);
459: buffer_put_bignum(b, key->e);
460: buffer_put_bignum(b, key->d);
461: /* To keep within the protocol: p < q for ssh. in SSL p > q */
462: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
463: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
464: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 465: buffer_put_cstring(b, comment);
1.22 markus 466: }
467:
1.41 itojun 468: static void
1.30 markus 469: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 470: {
1.30 markus 471: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 472: switch (key->type) {
1.30 markus 473: case KEY_RSA:
474: buffer_put_bignum2(b, key->rsa->n);
475: buffer_put_bignum2(b, key->rsa->e);
476: buffer_put_bignum2(b, key->rsa->d);
477: buffer_put_bignum2(b, key->rsa->iqmp);
478: buffer_put_bignum2(b, key->rsa->p);
479: buffer_put_bignum2(b, key->rsa->q);
480: break;
481: case KEY_DSA:
482: buffer_put_bignum2(b, key->dsa->p);
483: buffer_put_bignum2(b, key->dsa->q);
484: buffer_put_bignum2(b, key->dsa->g);
485: buffer_put_bignum2(b, key->dsa->pub_key);
486: buffer_put_bignum2(b, key->dsa->priv_key);
487: break;
488: }
489: buffer_put_cstring(b, comment);
1.22 markus 490: }
491:
1.14 markus 492: /*
493: * Adds an identity to the authentication server. This call is not meant to
494: * be used by normal applications.
495: */
1.1 deraadt 496:
1.18 markus 497: int
1.54 markus 498: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 499: const char *comment, u_int life, u_int confirm)
1.1 deraadt 500: {
1.25 markus 501: Buffer msg;
1.58 markus 502: int type, constrained = (life || confirm);
1.12 markus 503:
1.25 markus 504: buffer_init(&msg);
1.22 markus 505:
506: switch (key->type) {
1.30 markus 507: case KEY_RSA1:
1.54 markus 508: type = constrained ?
509: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
510: SSH_AGENTC_ADD_RSA_IDENTITY;
511: buffer_put_char(&msg, type);
1.30 markus 512: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
513: break;
1.22 markus 514: case KEY_RSA:
515: case KEY_DSA:
1.54 markus 516: type = constrained ?
517: SSH2_AGENTC_ADD_ID_CONSTRAINED :
518: SSH2_AGENTC_ADD_IDENTITY;
519: buffer_put_char(&msg, type);
1.30 markus 520: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 521: break;
522: default:
1.25 markus 523: buffer_free(&msg);
1.22 markus 524: return 0;
525: }
1.54 markus 526: if (constrained) {
527: if (life != 0) {
528: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
529: buffer_put_int(&msg, life);
530: }
1.58 markus 531: if (confirm != 0)
532: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 533: }
1.25 markus 534: if (ssh_request_reply(auth, &msg, &msg) == 0) {
535: buffer_free(&msg);
1.12 markus 536: return 0;
537: }
1.25 markus 538: type = buffer_get_char(&msg);
539: buffer_free(&msg);
1.24 markus 540: return decode_reply(type);
1.12 markus 541: }
1.1 deraadt 542:
1.54 markus 543: int
544: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
545: {
1.58 markus 546: return ssh_add_identity_constrained(auth, key, comment, 0, 0);
1.54 markus 547: }
548:
1.14 markus 549: /*
550: * Removes an identity from the authentication server. This call is not
551: * meant to be used by normal applications.
552: */
1.1 deraadt 553:
1.18 markus 554: int
1.25 markus 555: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 556: {
1.25 markus 557: Buffer msg;
1.24 markus 558: int type;
1.31 markus 559: u_char *blob;
560: u_int blen;
1.12 markus 561:
1.25 markus 562: buffer_init(&msg);
1.12 markus 563:
1.30 markus 564: if (key->type == KEY_RSA1) {
1.25 markus 565: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
566: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
567: buffer_put_bignum(&msg, key->rsa->e);
568: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 569: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
570: key_to_blob(key, &blob, &blen);
1.25 markus 571: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 572: buffer_put_string(&msg, blob, blen);
573: xfree(blob);
574: } else {
575: buffer_free(&msg);
576: return 0;
577: }
1.42 markus 578: if (ssh_request_reply(auth, &msg, &msg) == 0) {
579: buffer_free(&msg);
580: return 0;
581: }
582: type = buffer_get_char(&msg);
583: buffer_free(&msg);
584: return decode_reply(type);
585: }
586:
587: int
1.63 djm 588: ssh_update_card(AuthenticationConnection *auth, int add,
1.60 djm 589: const char *reader_id, const char *pin, u_int life, u_int confirm)
1.42 markus 590: {
591: Buffer msg;
1.60 djm 592: int type, constrained = (life || confirm);
593:
594: if (add) {
595: type = constrained ?
596: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
597: SSH_AGENTC_ADD_SMARTCARD_KEY;
598: } else
599: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 600:
601: buffer_init(&msg);
1.60 djm 602: buffer_put_char(&msg, type);
1.43 markus 603: buffer_put_cstring(&msg, reader_id);
1.49 rees 604: buffer_put_cstring(&msg, pin);
1.63 djm 605:
1.60 djm 606: if (constrained) {
607: if (life != 0) {
608: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
609: buffer_put_int(&msg, life);
610: }
611: if (confirm != 0)
612: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
613: }
614:
1.25 markus 615: if (ssh_request_reply(auth, &msg, &msg) == 0) {
616: buffer_free(&msg);
1.12 markus 617: return 0;
618: }
1.25 markus 619: type = buffer_get_char(&msg);
620: buffer_free(&msg);
1.24 markus 621: return decode_reply(type);
1.12 markus 622: }
623:
1.14 markus 624: /*
625: * Removes all identities from the agent. This call is not meant to be used
626: * by normal applications.
627: */
1.1 deraadt 628:
1.18 markus 629: int
1.25 markus 630: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 631: {
1.25 markus 632: Buffer msg;
1.24 markus 633: int type;
1.25 markus 634: int code = (version==1) ?
635: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
636: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 637:
1.25 markus 638: buffer_init(&msg);
639: buffer_put_char(&msg, code);
1.12 markus 640:
1.25 markus 641: if (ssh_request_reply(auth, &msg, &msg) == 0) {
642: buffer_free(&msg);
1.12 markus 643: return 0;
644: }
1.25 markus 645: type = buffer_get_char(&msg);
646: buffer_free(&msg);
1.24 markus 647: return decode_reply(type);
1.21 markus 648: }
649:
1.35 stevesk 650: int
1.24 markus 651: decode_reply(int type)
1.21 markus 652: {
1.12 markus 653: switch (type) {
654: case SSH_AGENT_FAILURE:
1.29 markus 655: case SSH_COM_AGENT2_FAILURE:
1.44 markus 656: case SSH2_AGENT_FAILURE:
1.59 itojun 657: logit("SSH_AGENT_FAILURE");
1.12 markus 658: return 0;
659: case SSH_AGENT_SUCCESS:
660: return 1;
661: default:
1.21 markus 662: fatal("Bad response from authentication agent: %d", type);
1.12 markus 663: }
664: /* NOTREACHED */
665: return 0;
666: }
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