Annotation of src/usr.bin/ssh/authfd.c, Revision 1.93
1.93 ! markus 1: /* $OpenBSD: authfd.c,v 1.92 2014/01/31 16:39:19 tedu 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:
1.67 stevesk 38:
39: #include <sys/types.h>
40: #include <sys/un.h>
1.75 stevesk 41: #include <sys/socket.h>
1.33 markus 42:
1.76 stevesk 43: #include <fcntl.h>
1.79 stevesk 44: #include <stdlib.h>
1.80 deraadt 45: #include <signal.h>
1.78 stevesk 46: #include <string.h>
1.77 stevesk 47: #include <unistd.h>
1.1 deraadt 48:
1.80 deraadt 49: #include "xmalloc.h"
1.1 deraadt 50: #include "ssh.h"
51: #include "rsa.h"
52: #include "buffer.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:
1.92 tedu 100: memset(&sunaddr, 0, sizeof(sunaddr));
1.12 markus 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 */
1.85 djm 109: if (fcntl(sock, F_SETFD, FD_CLOEXEC) == -1) {
1.12 markus 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:
1.88 djm 204: auth = xcalloc(1, sizeof(*auth));
1.12 markus 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);
1.87 djm 222: free(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: {
1.93 ! markus 311: #ifdef WITH_SSH1
1.66 djm 312: int keybits;
1.31 markus 313: u_int bits;
1.93 ! markus 314: #endif
1.31 markus 315: u_char *blob;
316: u_int blen;
1.25 markus 317: Key *key = NULL;
1.9 markus 318:
1.12 markus 319: /* Return failure if no more entries. */
320: if (auth->howmany <= 0)
1.25 markus 321: return NULL;
1.12 markus 322:
1.14 markus 323: /*
324: * Get the next entry from the packet. These will abort with a fatal
325: * error if the packet is too short or contains corrupt data.
326: */
1.46 deraadt 327: switch (version) {
1.93 ! markus 328: #ifdef WITH_SSH1
1.25 markus 329: case 1:
1.30 markus 330: key = key_new(KEY_RSA1);
1.25 markus 331: bits = buffer_get_int(&auth->identities);
332: buffer_get_bignum(&auth->identities, key->rsa->e);
333: buffer_get_bignum(&auth->identities, key->rsa->n);
334: *comment = buffer_get_string(&auth->identities, NULL);
1.66 djm 335: keybits = BN_num_bits(key->rsa->n);
336: if (keybits < 0 || bits != (u_int)keybits)
1.59 itojun 337: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 338: BN_num_bits(key->rsa->n), bits);
339: break;
1.93 ! markus 340: #endif
1.25 markus 341: case 2:
342: blob = buffer_get_string(&auth->identities, &blen);
343: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 344: key = key_from_blob(blob, blen);
1.87 djm 345: free(blob);
1.25 markus 346: break;
347: default:
348: return NULL;
349: }
1.12 markus 350: /* Decrement the number of remaining entries. */
351: auth->howmany--;
1.25 markus 352: return key;
1.1 deraadt 353: }
354:
1.14 markus 355: /*
356: * Generates a random challenge, sends it to the agent, and waits for
357: * response from the agent. Returns true (non-zero) if the agent gave the
358: * correct answer, zero otherwise. Response type selects the style of
359: * response desired, with 0 corresponding to protocol version 1.0 (no longer
360: * supported) and 1 corresponding to protocol version 1.1.
361: */
1.1 deraadt 362:
1.93 ! markus 363: #ifdef WITH_SSH1
1.2 provos 364: int
365: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 366: Key* key, BIGNUM *challenge,
1.31 markus 367: u_char session_id[16],
368: u_int response_type,
369: u_char response[16])
1.1 deraadt 370: {
1.12 markus 371: Buffer buffer;
1.24 markus 372: int success = 0;
373: int i;
374: int type;
1.12 markus 375:
1.30 markus 376: if (key->type != KEY_RSA1)
1.25 markus 377: return 0;
378: if (response_type == 0) {
1.59 itojun 379: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 380: return 0;
381: }
1.12 markus 382: buffer_init(&buffer);
1.24 markus 383: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 384: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
385: buffer_put_bignum(&buffer, key->rsa->e);
386: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 387: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 388: buffer_append(&buffer, session_id, 16);
1.12 markus 389: buffer_put_int(&buffer, response_type);
390:
1.24 markus 391: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 392: buffer_free(&buffer);
393: return 0;
394: }
1.24 markus 395: type = buffer_get_char(&buffer);
1.12 markus 396:
1.29 markus 397: if (agent_failed(type)) {
1.59 itojun 398: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 399: } else if (type != SSH_AGENT_RSA_RESPONSE) {
400: fatal("Bad authentication response: %d", type);
401: } else {
402: success = 1;
403: /*
404: * Get the response from the packet. This will abort with a
405: * fatal error if the packet is corrupt.
406: */
407: for (i = 0; i < 16; i++)
1.73 deraadt 408: response[i] = (u_char)buffer_get_char(&buffer);
1.12 markus 409: }
410: buffer_free(&buffer);
1.24 markus 411: return success;
1.12 markus 412: }
1.93 ! markus 413: #endif
1.1 deraadt 414:
1.25 markus 415: /* ask agent to sign data, returns -1 on error, 0 on success */
416: int
417: ssh_agent_sign(AuthenticationConnection *auth,
418: Key *key,
1.48 markus 419: u_char **sigp, u_int *lenp,
420: u_char *data, u_int datalen)
1.25 markus 421: {
1.28 markus 422: extern int datafellows;
1.25 markus 423: Buffer msg;
1.31 markus 424: u_char *blob;
425: u_int blen;
1.28 markus 426: int type, flags = 0;
1.25 markus 427: int ret = -1;
428:
1.30 markus 429: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 430: return -1;
431:
1.28 markus 432: if (datafellows & SSH_BUG_SIGBLOB)
433: flags = SSH_AGENT_OLD_SIGNATURE;
434:
1.25 markus 435: buffer_init(&msg);
436: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
437: buffer_put_string(&msg, blob, blen);
438: buffer_put_string(&msg, data, datalen);
1.28 markus 439: buffer_put_int(&msg, flags);
1.87 djm 440: free(blob);
1.25 markus 441:
442: if (ssh_request_reply(auth, &msg, &msg) == 0) {
443: buffer_free(&msg);
444: return -1;
445: }
446: type = buffer_get_char(&msg);
1.29 markus 447: if (agent_failed(type)) {
1.59 itojun 448: logit("Agent admitted failure to sign using the key.");
1.25 markus 449: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
450: fatal("Bad authentication response: %d", type);
451: } else {
452: ret = 0;
453: *sigp = buffer_get_string(&msg, lenp);
454: }
455: buffer_free(&msg);
456: return ret;
457: }
458:
1.22 markus 459: /* Encode key for a message to the agent. */
460:
1.93 ! markus 461: #ifdef WITH_SSH1
1.41 itojun 462: static void
1.30 markus 463: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 464: {
465: buffer_put_int(b, BN_num_bits(key->n));
466: buffer_put_bignum(b, key->n);
467: buffer_put_bignum(b, key->e);
468: buffer_put_bignum(b, key->d);
469: /* To keep within the protocol: p < q for ssh. in SSL p > q */
470: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
471: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
472: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 473: buffer_put_cstring(b, comment);
1.22 markus 474: }
1.93 ! markus 475: #endif
1.22 markus 476:
1.41 itojun 477: static void
1.30 markus 478: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 479: {
1.89 markus 480: key_private_serialize(key, b);
1.30 markus 481: buffer_put_cstring(b, comment);
1.22 markus 482: }
483:
1.14 markus 484: /*
485: * Adds an identity to the authentication server. This call is not meant to
486: * be used by normal applications.
487: */
1.1 deraadt 488:
1.18 markus 489: int
1.54 markus 490: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 491: const char *comment, u_int life, u_int confirm)
1.1 deraadt 492: {
1.25 markus 493: Buffer msg;
1.58 markus 494: int type, constrained = (life || confirm);
1.12 markus 495:
1.25 markus 496: buffer_init(&msg);
1.22 markus 497:
498: switch (key->type) {
1.93 ! markus 499: #ifdef WITH_SSH1
1.30 markus 500: case KEY_RSA1:
1.54 markus 501: type = constrained ?
502: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
503: SSH_AGENTC_ADD_RSA_IDENTITY;
504: buffer_put_char(&msg, type);
1.30 markus 505: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
506: break;
1.93 ! markus 507: #endif
! 508: #ifdef WITH_OPENSSL
1.22 markus 509: case KEY_RSA:
1.82 djm 510: case KEY_RSA_CERT:
1.83 djm 511: case KEY_RSA_CERT_V00:
1.22 markus 512: case KEY_DSA:
1.82 djm 513: case KEY_DSA_CERT:
1.83 djm 514: case KEY_DSA_CERT_V00:
1.84 djm 515: case KEY_ECDSA:
516: case KEY_ECDSA_CERT:
1.93 ! markus 517: #endif
1.90 markus 518: case KEY_ED25519:
519: case KEY_ED25519_CERT:
1.54 markus 520: type = constrained ?
521: SSH2_AGENTC_ADD_ID_CONSTRAINED :
522: SSH2_AGENTC_ADD_IDENTITY;
523: buffer_put_char(&msg, type);
1.30 markus 524: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 525: break;
526: default:
1.25 markus 527: buffer_free(&msg);
1.22 markus 528: return 0;
529: }
1.54 markus 530: if (constrained) {
531: if (life != 0) {
532: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
533: buffer_put_int(&msg, life);
534: }
1.58 markus 535: if (confirm != 0)
536: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 537: }
1.25 markus 538: if (ssh_request_reply(auth, &msg, &msg) == 0) {
539: buffer_free(&msg);
1.12 markus 540: return 0;
541: }
1.25 markus 542: type = buffer_get_char(&msg);
543: buffer_free(&msg);
1.24 markus 544: return decode_reply(type);
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:
1.93 ! markus 562: #ifdef WITH_SSH1
1.30 markus 563: if (key->type == KEY_RSA1) {
1.25 markus 564: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
565: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
566: buffer_put_bignum(&msg, key->rsa->e);
567: buffer_put_bignum(&msg, key->rsa->n);
1.93 ! markus 568: } else
! 569: #endif
! 570: if (key->type != KEY_UNSPEC) {
1.30 markus 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);
1.87 djm 574: free(blob);
1.51 markus 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: }
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