Annotation of src/usr.bin/ssh/authfd.c, Revision 1.77
1.77 ! stevesk 1: /* $OpenBSD: authfd.c,v 1.76 2006/07/09 15:15:10 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>
1.77 ! stevesk 47: #include <unistd.h>
1.1 deraadt 48:
49: #include "ssh.h"
50: #include "rsa.h"
51: #include "buffer.h"
52: #include "bufaux.h"
53: #include "xmalloc.h"
1.22 markus 54: #include "key.h"
55: #include "authfd.h"
1.33 markus 56: #include "cipher.h"
1.22 markus 57: #include "kex.h"
1.28 markus 58: #include "compat.h"
1.33 markus 59: #include "log.h"
60: #include "atomicio.h"
1.74 djm 61: #include "misc.h"
1.2 provos 62:
1.57 stevesk 63: static int agent_present = 0;
64:
1.21 markus 65: /* helper */
1.24 markus 66: int decode_reply(int type);
1.21 markus 67:
1.29 markus 68: /* macro to check for "agent failure" message */
69: #define agent_failed(x) \
1.44 markus 70: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 71: (x == SSH2_AGENT_FAILURE))
1.29 markus 72:
1.57 stevesk 73: int
74: ssh_agent_present(void)
75: {
76: int authfd;
77:
78: if (agent_present)
79: return 1;
80: if ((authfd = ssh_get_authentication_socket()) == -1)
81: return 0;
82: else {
83: ssh_close_authentication_socket(authfd);
84: return 1;
85: }
86: }
87:
1.1 deraadt 88: /* Returns the number of the authentication fd, or -1 if there is none. */
89:
1.2 provos 90: int
1.32 markus 91: ssh_get_authentication_socket(void)
1.1 deraadt 92: {
1.12 markus 93: const char *authsocket;
1.45 stevesk 94: int sock;
1.12 markus 95: struct sockaddr_un sunaddr;
96:
97: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
98: if (!authsocket)
99: return -1;
100:
101: sunaddr.sun_family = AF_UNIX;
102: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
103:
104: sock = socket(AF_UNIX, SOCK_STREAM, 0);
105: if (sock < 0)
106: return -1;
107:
108: /* close on exec */
109: if (fcntl(sock, F_SETFD, 1) == -1) {
110: close(sock);
111: return -1;
112: }
1.71 deraadt 113: if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) {
1.12 markus 114: close(sock);
115: return -1;
116: }
1.57 stevesk 117: agent_present = 1;
1.12 markus 118: return sock;
1.1 deraadt 119: }
120:
1.41 itojun 121: static int
1.25 markus 122: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 123: {
1.66 djm 124: u_int l, len;
1.24 markus 125: char buf[1024];
126:
127: /* Get the length of the message, and format it in the buffer. */
128: len = buffer_len(request);
1.74 djm 129: put_u32(buf, len);
1.24 markus 130:
131: /* Send the length and then the packet to the agent. */
1.61 deraadt 132: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
133: atomicio(vwrite, auth->fd, buffer_ptr(request),
1.24 markus 134: buffer_len(request)) != buffer_len(request)) {
135: error("Error writing to authentication socket.");
136: return 0;
137: }
138: /*
139: * Wait for response from the agent. First read the length of the
140: * response packet.
141: */
1.64 avsm 142: if (atomicio(read, auth->fd, buf, 4) != 4) {
143: error("Error reading response length from authentication socket.");
144: return 0;
1.24 markus 145: }
146:
147: /* Extract the length, and check it for sanity. */
1.74 djm 148: len = get_u32(buf);
1.24 markus 149: if (len > 256 * 1024)
1.62 miod 150: fatal("Authentication response too long: %u", len);
1.24 markus 151:
152: /* Read the rest of the response in to the buffer. */
153: buffer_clear(reply);
154: while (len > 0) {
155: l = len;
156: if (l > sizeof(buf))
157: l = sizeof(buf);
1.65 avsm 158: if (atomicio(read, auth->fd, buf, l) != l) {
1.24 markus 159: error("Error reading response from authentication socket.");
160: return 0;
161: }
1.56 markus 162: buffer_append(reply, buf, l);
1.24 markus 163: len -= l;
164: }
165: return 1;
166: }
167:
1.14 markus 168: /*
169: * Closes the agent socket if it should be closed (depends on how it was
170: * obtained). The argument must have been returned by
171: * ssh_get_authentication_socket().
172: */
1.1 deraadt 173:
1.18 markus 174: void
1.12 markus 175: ssh_close_authentication_socket(int sock)
1.1 deraadt 176: {
1.12 markus 177: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
178: close(sock);
1.1 deraadt 179: }
180:
1.14 markus 181: /*
182: * Opens and connects a private socket for communication with the
183: * authentication agent. Returns the file descriptor (which must be
184: * shut down and closed by the caller when no longer needed).
185: * Returns NULL if an error occurred and the connection could not be
186: * opened.
187: */
1.1 deraadt 188:
1.12 markus 189: AuthenticationConnection *
1.32 markus 190: ssh_get_authentication_connection(void)
1.1 deraadt 191: {
1.12 markus 192: AuthenticationConnection *auth;
193: int sock;
1.1 deraadt 194:
1.12 markus 195: sock = ssh_get_authentication_socket();
196:
1.14 markus 197: /*
198: * Fail if we couldn't obtain a connection. This happens if we
199: * exited due to a timeout.
200: */
1.12 markus 201: if (sock < 0)
202: return NULL;
203:
204: auth = xmalloc(sizeof(*auth));
205: auth->fd = sock;
206: buffer_init(&auth->identities);
207: auth->howmany = 0;
208:
209: return auth;
1.1 deraadt 210: }
211:
1.14 markus 212: /*
213: * Closes the connection to the authentication agent and frees any associated
214: * memory.
215: */
1.1 deraadt 216:
1.18 markus 217: void
1.25 markus 218: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 219: {
1.25 markus 220: buffer_free(&auth->identities);
221: close(auth->fd);
222: xfree(auth);
1.50 markus 223: }
224:
225: /* Lock/unlock agent */
226: int
227: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
228: {
229: int type;
230: Buffer msg;
231:
232: buffer_init(&msg);
233: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
234: buffer_put_cstring(&msg, password);
235:
236: if (ssh_request_reply(auth, &msg, &msg) == 0) {
237: buffer_free(&msg);
238: return 0;
239: }
240: type = buffer_get_char(&msg);
241: buffer_free(&msg);
242: return decode_reply(type);
1.1 deraadt 243: }
244:
1.14 markus 245: /*
246: * Returns the first authentication identity held by the agent.
247: */
1.1 deraadt 248:
1.30 markus 249: int
250: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 251: {
1.25 markus 252: int type, code1 = 0, code2 = 0;
1.24 markus 253: Buffer request;
1.25 markus 254:
1.46 deraadt 255: switch (version) {
1.25 markus 256: case 1:
257: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
258: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
259: break;
260: case 2:
261: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
262: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
263: break;
264: default:
1.30 markus 265: return 0;
1.25 markus 266: }
1.1 deraadt 267:
1.14 markus 268: /*
269: * Send a message to the agent requesting for a list of the
270: * identities it can represent.
271: */
1.24 markus 272: buffer_init(&request);
1.25 markus 273: buffer_put_char(&request, code1);
1.12 markus 274:
275: buffer_clear(&auth->identities);
1.24 markus 276: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
277: buffer_free(&request);
1.30 markus 278: return 0;
1.12 markus 279: }
1.24 markus 280: buffer_free(&request);
1.1 deraadt 281:
1.12 markus 282: /* Get message type, and verify that we got a proper answer. */
1.24 markus 283: type = buffer_get_char(&auth->identities);
1.29 markus 284: if (agent_failed(type)) {
1.30 markus 285: return 0;
1.25 markus 286: } else if (type != code2) {
1.24 markus 287: fatal("Bad authentication reply message type: %d", type);
1.25 markus 288: }
1.12 markus 289:
290: /* Get the number of entries in the response and check it for sanity. */
291: auth->howmany = buffer_get_int(&auth->identities);
1.62 miod 292: if ((u_int)auth->howmany > 1024)
1.37 millert 293: fatal("Too many identities in authentication reply: %d",
1.24 markus 294: auth->howmany);
1.12 markus 295:
1.30 markus 296: return auth->howmany;
297: }
298:
299: Key *
300: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
301: {
302: /* get number of identities and return the first entry (if any). */
303: if (ssh_get_num_identities(auth, version) > 0)
304: return ssh_get_next_identity(auth, comment, version);
305: return NULL;
1.1 deraadt 306: }
307:
1.25 markus 308: Key *
309: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 310: {
1.66 djm 311: int keybits;
1.31 markus 312: u_int bits;
313: u_char *blob;
314: u_int blen;
1.25 markus 315: Key *key = NULL;
1.9 markus 316:
1.12 markus 317: /* Return failure if no more entries. */
318: if (auth->howmany <= 0)
1.25 markus 319: return NULL;
1.12 markus 320:
1.14 markus 321: /*
322: * Get the next entry from the packet. These will abort with a fatal
323: * error if the packet is too short or contains corrupt data.
324: */
1.46 deraadt 325: switch (version) {
1.25 markus 326: case 1:
1.30 markus 327: key = key_new(KEY_RSA1);
1.25 markus 328: bits = buffer_get_int(&auth->identities);
329: buffer_get_bignum(&auth->identities, key->rsa->e);
330: buffer_get_bignum(&auth->identities, key->rsa->n);
331: *comment = buffer_get_string(&auth->identities, NULL);
1.66 djm 332: keybits = BN_num_bits(key->rsa->n);
333: if (keybits < 0 || bits != (u_int)keybits)
1.59 itojun 334: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 335: BN_num_bits(key->rsa->n), bits);
336: break;
337: case 2:
338: blob = buffer_get_string(&auth->identities, &blen);
339: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 340: key = key_from_blob(blob, blen);
1.25 markus 341: xfree(blob);
342: break;
343: default:
344: return NULL;
345: }
1.12 markus 346: /* Decrement the number of remaining entries. */
347: auth->howmany--;
1.25 markus 348: return key;
1.1 deraadt 349: }
350:
1.14 markus 351: /*
352: * Generates a random challenge, sends it to the agent, and waits for
353: * response from the agent. Returns true (non-zero) if the agent gave the
354: * correct answer, zero otherwise. Response type selects the style of
355: * response desired, with 0 corresponding to protocol version 1.0 (no longer
356: * supported) and 1 corresponding to protocol version 1.1.
357: */
1.1 deraadt 358:
1.2 provos 359: int
360: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 361: Key* key, BIGNUM *challenge,
1.31 markus 362: u_char session_id[16],
363: u_int response_type,
364: u_char response[16])
1.1 deraadt 365: {
1.12 markus 366: Buffer buffer;
1.24 markus 367: int success = 0;
368: int i;
369: int type;
1.12 markus 370:
1.30 markus 371: if (key->type != KEY_RSA1)
1.25 markus 372: return 0;
373: if (response_type == 0) {
1.59 itojun 374: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 375: return 0;
376: }
1.12 markus 377: buffer_init(&buffer);
1.24 markus 378: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 379: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
380: buffer_put_bignum(&buffer, key->rsa->e);
381: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 382: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 383: buffer_append(&buffer, session_id, 16);
1.12 markus 384: buffer_put_int(&buffer, response_type);
385:
1.24 markus 386: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 387: buffer_free(&buffer);
388: return 0;
389: }
1.24 markus 390: type = buffer_get_char(&buffer);
1.12 markus 391:
1.29 markus 392: if (agent_failed(type)) {
1.59 itojun 393: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 394: } else if (type != SSH_AGENT_RSA_RESPONSE) {
395: fatal("Bad authentication response: %d", type);
396: } else {
397: success = 1;
398: /*
399: * Get the response from the packet. This will abort with a
400: * fatal error if the packet is corrupt.
401: */
402: for (i = 0; i < 16; i++)
1.73 deraadt 403: response[i] = (u_char)buffer_get_char(&buffer);
1.12 markus 404: }
405: buffer_free(&buffer);
1.24 markus 406: return success;
1.12 markus 407: }
1.1 deraadt 408:
1.25 markus 409: /* ask agent to sign data, returns -1 on error, 0 on success */
410: int
411: ssh_agent_sign(AuthenticationConnection *auth,
412: Key *key,
1.48 markus 413: u_char **sigp, u_int *lenp,
414: u_char *data, u_int datalen)
1.25 markus 415: {
1.28 markus 416: extern int datafellows;
1.25 markus 417: Buffer msg;
1.31 markus 418: u_char *blob;
419: u_int blen;
1.28 markus 420: int type, flags = 0;
1.25 markus 421: int ret = -1;
422:
1.30 markus 423: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 424: return -1;
425:
1.28 markus 426: if (datafellows & SSH_BUG_SIGBLOB)
427: flags = SSH_AGENT_OLD_SIGNATURE;
428:
1.25 markus 429: buffer_init(&msg);
430: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
431: buffer_put_string(&msg, blob, blen);
432: buffer_put_string(&msg, data, datalen);
1.28 markus 433: buffer_put_int(&msg, flags);
1.25 markus 434: xfree(blob);
435:
436: if (ssh_request_reply(auth, &msg, &msg) == 0) {
437: buffer_free(&msg);
438: return -1;
439: }
440: type = buffer_get_char(&msg);
1.29 markus 441: if (agent_failed(type)) {
1.59 itojun 442: logit("Agent admitted failure to sign using the key.");
1.25 markus 443: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
444: fatal("Bad authentication response: %d", type);
445: } else {
446: ret = 0;
447: *sigp = buffer_get_string(&msg, lenp);
448: }
449: buffer_free(&msg);
450: return ret;
451: }
452:
1.22 markus 453: /* Encode key for a message to the agent. */
454:
1.41 itojun 455: static void
1.30 markus 456: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 457: {
458: buffer_put_int(b, BN_num_bits(key->n));
459: buffer_put_bignum(b, key->n);
460: buffer_put_bignum(b, key->e);
461: buffer_put_bignum(b, key->d);
462: /* To keep within the protocol: p < q for ssh. in SSL p > q */
463: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
464: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
465: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 466: buffer_put_cstring(b, comment);
1.22 markus 467: }
468:
1.41 itojun 469: static void
1.30 markus 470: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 471: {
1.30 markus 472: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 473: switch (key->type) {
1.30 markus 474: case KEY_RSA:
475: buffer_put_bignum2(b, key->rsa->n);
476: buffer_put_bignum2(b, key->rsa->e);
477: buffer_put_bignum2(b, key->rsa->d);
478: buffer_put_bignum2(b, key->rsa->iqmp);
479: buffer_put_bignum2(b, key->rsa->p);
480: buffer_put_bignum2(b, key->rsa->q);
481: break;
482: case KEY_DSA:
483: buffer_put_bignum2(b, key->dsa->p);
484: buffer_put_bignum2(b, key->dsa->q);
485: buffer_put_bignum2(b, key->dsa->g);
486: buffer_put_bignum2(b, key->dsa->pub_key);
487: buffer_put_bignum2(b, key->dsa->priv_key);
488: break;
489: }
490: buffer_put_cstring(b, comment);
1.22 markus 491: }
492:
1.14 markus 493: /*
494: * Adds an identity to the authentication server. This call is not meant to
495: * be used by normal applications.
496: */
1.1 deraadt 497:
1.18 markus 498: int
1.54 markus 499: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 500: const char *comment, u_int life, u_int confirm)
1.1 deraadt 501: {
1.25 markus 502: Buffer msg;
1.58 markus 503: int type, constrained = (life || confirm);
1.12 markus 504:
1.25 markus 505: buffer_init(&msg);
1.22 markus 506:
507: switch (key->type) {
1.30 markus 508: case KEY_RSA1:
1.54 markus 509: type = constrained ?
510: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
511: SSH_AGENTC_ADD_RSA_IDENTITY;
512: buffer_put_char(&msg, type);
1.30 markus 513: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
514: break;
1.22 markus 515: case KEY_RSA:
516: case KEY_DSA:
1.54 markus 517: type = constrained ?
518: SSH2_AGENTC_ADD_ID_CONSTRAINED :
519: SSH2_AGENTC_ADD_IDENTITY;
520: buffer_put_char(&msg, type);
1.30 markus 521: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 522: break;
523: default:
1.25 markus 524: buffer_free(&msg);
1.22 markus 525: return 0;
526: }
1.54 markus 527: if (constrained) {
528: if (life != 0) {
529: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
530: buffer_put_int(&msg, life);
531: }
1.58 markus 532: if (confirm != 0)
533: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 534: }
1.25 markus 535: if (ssh_request_reply(auth, &msg, &msg) == 0) {
536: buffer_free(&msg);
1.12 markus 537: return 0;
538: }
1.25 markus 539: type = buffer_get_char(&msg);
540: buffer_free(&msg);
1.24 markus 541: return decode_reply(type);
1.12 markus 542: }
1.1 deraadt 543:
1.54 markus 544: int
545: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
546: {
1.58 markus 547: return ssh_add_identity_constrained(auth, key, comment, 0, 0);
1.54 markus 548: }
549:
1.14 markus 550: /*
551: * Removes an identity from the authentication server. This call is not
552: * meant to be used by normal applications.
553: */
1.1 deraadt 554:
1.18 markus 555: int
1.25 markus 556: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 557: {
1.25 markus 558: Buffer msg;
1.24 markus 559: int type;
1.31 markus 560: u_char *blob;
561: u_int blen;
1.12 markus 562:
1.25 markus 563: buffer_init(&msg);
1.12 markus 564:
1.30 markus 565: if (key->type == KEY_RSA1) {
1.25 markus 566: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
567: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
568: buffer_put_bignum(&msg, key->rsa->e);
569: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 570: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
571: key_to_blob(key, &blob, &blen);
1.25 markus 572: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 573: buffer_put_string(&msg, blob, blen);
574: xfree(blob);
575: } else {
576: buffer_free(&msg);
577: return 0;
578: }
1.42 markus 579: if (ssh_request_reply(auth, &msg, &msg) == 0) {
580: buffer_free(&msg);
581: return 0;
582: }
583: type = buffer_get_char(&msg);
584: buffer_free(&msg);
585: return decode_reply(type);
586: }
587:
588: int
1.63 djm 589: ssh_update_card(AuthenticationConnection *auth, int add,
1.60 djm 590: const char *reader_id, const char *pin, u_int life, u_int confirm)
1.42 markus 591: {
592: Buffer msg;
1.60 djm 593: int type, constrained = (life || confirm);
594:
595: if (add) {
596: type = constrained ?
597: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
598: SSH_AGENTC_ADD_SMARTCARD_KEY;
599: } else
600: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 601:
602: buffer_init(&msg);
1.60 djm 603: buffer_put_char(&msg, type);
1.43 markus 604: buffer_put_cstring(&msg, reader_id);
1.49 rees 605: buffer_put_cstring(&msg, pin);
1.63 djm 606:
1.60 djm 607: if (constrained) {
608: if (life != 0) {
609: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
610: buffer_put_int(&msg, life);
611: }
612: if (confirm != 0)
613: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
614: }
615:
1.25 markus 616: if (ssh_request_reply(auth, &msg, &msg) == 0) {
617: buffer_free(&msg);
1.12 markus 618: return 0;
619: }
1.25 markus 620: type = buffer_get_char(&msg);
621: buffer_free(&msg);
1.24 markus 622: return decode_reply(type);
1.12 markus 623: }
624:
1.14 markus 625: /*
626: * Removes all identities from the agent. This call is not meant to be used
627: * by normal applications.
628: */
1.1 deraadt 629:
1.18 markus 630: int
1.25 markus 631: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 632: {
1.25 markus 633: Buffer msg;
1.24 markus 634: int type;
1.25 markus 635: int code = (version==1) ?
636: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
637: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 638:
1.25 markus 639: buffer_init(&msg);
640: buffer_put_char(&msg, code);
1.12 markus 641:
1.25 markus 642: if (ssh_request_reply(auth, &msg, &msg) == 0) {
643: buffer_free(&msg);
1.12 markus 644: return 0;
645: }
1.25 markus 646: type = buffer_get_char(&msg);
647: buffer_free(&msg);
1.24 markus 648: return decode_reply(type);
1.21 markus 649: }
650:
1.35 stevesk 651: int
1.24 markus 652: decode_reply(int type)
1.21 markus 653: {
1.12 markus 654: switch (type) {
655: case SSH_AGENT_FAILURE:
1.29 markus 656: case SSH_COM_AGENT2_FAILURE:
1.44 markus 657: case SSH2_AGENT_FAILURE:
1.59 itojun 658: logit("SSH_AGENT_FAILURE");
1.12 markus 659: return 0;
660: case SSH_AGENT_SUCCESS:
661: return 1;
662: default:
1.21 markus 663: fatal("Bad response from authentication agent: %d", type);
1.12 markus 664: }
665: /* NOTREACHED */
666: return 0;
667: }