Annotation of src/usr.bin/ssh/authfd.c, Revision 1.82
1.82 ! djm 1: /* $OpenBSD: authfd.c,v 1.81 2009/08/27 17:44:52 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:
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:
43: #include <openssl/evp.h>
1.76 stevesk 44:
1.80 deraadt 45: #include <openssl/crypto.h>
1.76 stevesk 46: #include <fcntl.h>
1.79 stevesk 47: #include <stdlib.h>
1.80 deraadt 48: #include <signal.h>
1.78 stevesk 49: #include <string.h>
1.77 stevesk 50: #include <unistd.h>
1.1 deraadt 51:
1.80 deraadt 52: #include "xmalloc.h"
1.1 deraadt 53: #include "ssh.h"
54: #include "rsa.h"
55: #include "buffer.h"
1.22 markus 56: #include "key.h"
57: #include "authfd.h"
1.33 markus 58: #include "cipher.h"
1.22 markus 59: #include "kex.h"
1.28 markus 60: #include "compat.h"
1.33 markus 61: #include "log.h"
62: #include "atomicio.h"
1.74 djm 63: #include "misc.h"
1.2 provos 64:
1.57 stevesk 65: static int agent_present = 0;
66:
1.21 markus 67: /* helper */
1.24 markus 68: int decode_reply(int type);
1.21 markus 69:
1.29 markus 70: /* macro to check for "agent failure" message */
71: #define agent_failed(x) \
1.44 markus 72: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 73: (x == SSH2_AGENT_FAILURE))
1.29 markus 74:
1.57 stevesk 75: int
76: ssh_agent_present(void)
77: {
78: int authfd;
79:
80: if (agent_present)
81: return 1;
82: if ((authfd = ssh_get_authentication_socket()) == -1)
83: return 0;
84: else {
85: ssh_close_authentication_socket(authfd);
86: return 1;
87: }
88: }
89:
1.1 deraadt 90: /* Returns the number of the authentication fd, or -1 if there is none. */
91:
1.2 provos 92: int
1.32 markus 93: ssh_get_authentication_socket(void)
1.1 deraadt 94: {
1.12 markus 95: const char *authsocket;
1.45 stevesk 96: int sock;
1.12 markus 97: struct sockaddr_un sunaddr;
98:
99: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
100: if (!authsocket)
101: return -1;
102:
103: sunaddr.sun_family = AF_UNIX;
104: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
105:
106: sock = socket(AF_UNIX, SOCK_STREAM, 0);
107: if (sock < 0)
108: return -1;
109:
110: /* close on exec */
111: if (fcntl(sock, F_SETFD, 1) == -1) {
112: close(sock);
113: return -1;
114: }
1.71 deraadt 115: if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) {
1.12 markus 116: close(sock);
117: return -1;
118: }
1.57 stevesk 119: agent_present = 1;
1.12 markus 120: return sock;
1.1 deraadt 121: }
122:
1.41 itojun 123: static int
1.25 markus 124: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 125: {
1.66 djm 126: u_int l, len;
1.24 markus 127: char buf[1024];
128:
129: /* Get the length of the message, and format it in the buffer. */
130: len = buffer_len(request);
1.74 djm 131: put_u32(buf, len);
1.24 markus 132:
133: /* Send the length and then the packet to the agent. */
1.61 deraadt 134: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
135: atomicio(vwrite, auth->fd, buffer_ptr(request),
1.24 markus 136: buffer_len(request)) != buffer_len(request)) {
137: error("Error writing to authentication socket.");
138: return 0;
139: }
140: /*
141: * Wait for response from the agent. First read the length of the
142: * response packet.
143: */
1.64 avsm 144: if (atomicio(read, auth->fd, buf, 4) != 4) {
145: error("Error reading response length from authentication socket.");
146: return 0;
1.24 markus 147: }
148:
149: /* Extract the length, and check it for sanity. */
1.74 djm 150: len = get_u32(buf);
1.24 markus 151: if (len > 256 * 1024)
1.62 miod 152: fatal("Authentication response too long: %u", len);
1.24 markus 153:
154: /* Read the rest of the response in to the buffer. */
155: buffer_clear(reply);
156: while (len > 0) {
157: l = len;
158: if (l > sizeof(buf))
159: l = sizeof(buf);
1.65 avsm 160: if (atomicio(read, auth->fd, buf, l) != l) {
1.24 markus 161: error("Error reading response from authentication socket.");
162: return 0;
163: }
1.56 markus 164: buffer_append(reply, buf, l);
1.24 markus 165: len -= l;
166: }
167: return 1;
168: }
169:
1.14 markus 170: /*
171: * Closes the agent socket if it should be closed (depends on how it was
172: * obtained). The argument must have been returned by
173: * ssh_get_authentication_socket().
174: */
1.1 deraadt 175:
1.18 markus 176: void
1.12 markus 177: ssh_close_authentication_socket(int sock)
1.1 deraadt 178: {
1.12 markus 179: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
180: close(sock);
1.1 deraadt 181: }
182:
1.14 markus 183: /*
184: * Opens and connects a private socket for communication with the
185: * authentication agent. Returns the file descriptor (which must be
186: * shut down and closed by the caller when no longer needed).
187: * Returns NULL if an error occurred and the connection could not be
188: * opened.
189: */
1.1 deraadt 190:
1.12 markus 191: AuthenticationConnection *
1.32 markus 192: ssh_get_authentication_connection(void)
1.1 deraadt 193: {
1.12 markus 194: AuthenticationConnection *auth;
195: int sock;
1.1 deraadt 196:
1.12 markus 197: sock = ssh_get_authentication_socket();
198:
1.14 markus 199: /*
200: * Fail if we couldn't obtain a connection. This happens if we
201: * exited due to a timeout.
202: */
1.12 markus 203: if (sock < 0)
204: return NULL;
205:
206: auth = xmalloc(sizeof(*auth));
207: auth->fd = sock;
208: buffer_init(&auth->identities);
209: auth->howmany = 0;
210:
211: return auth;
1.1 deraadt 212: }
213:
1.14 markus 214: /*
215: * Closes the connection to the authentication agent and frees any associated
216: * memory.
217: */
1.1 deraadt 218:
1.18 markus 219: void
1.25 markus 220: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 221: {
1.25 markus 222: buffer_free(&auth->identities);
223: close(auth->fd);
224: xfree(auth);
1.50 markus 225: }
226:
227: /* Lock/unlock agent */
228: int
229: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
230: {
231: int type;
232: Buffer msg;
233:
234: buffer_init(&msg);
235: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
236: buffer_put_cstring(&msg, password);
237:
238: if (ssh_request_reply(auth, &msg, &msg) == 0) {
239: buffer_free(&msg);
240: return 0;
241: }
242: type = buffer_get_char(&msg);
243: buffer_free(&msg);
244: return decode_reply(type);
1.1 deraadt 245: }
246:
1.14 markus 247: /*
248: * Returns the first authentication identity held by the agent.
249: */
1.1 deraadt 250:
1.30 markus 251: int
252: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 253: {
1.25 markus 254: int type, code1 = 0, code2 = 0;
1.24 markus 255: Buffer request;
1.25 markus 256:
1.46 deraadt 257: switch (version) {
1.25 markus 258: case 1:
259: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
260: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
261: break;
262: case 2:
263: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
264: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
265: break;
266: default:
1.30 markus 267: return 0;
1.25 markus 268: }
1.1 deraadt 269:
1.14 markus 270: /*
271: * Send a message to the agent requesting for a list of the
272: * identities it can represent.
273: */
1.24 markus 274: buffer_init(&request);
1.25 markus 275: buffer_put_char(&request, code1);
1.12 markus 276:
277: buffer_clear(&auth->identities);
1.24 markus 278: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
279: buffer_free(&request);
1.30 markus 280: return 0;
1.12 markus 281: }
1.24 markus 282: buffer_free(&request);
1.1 deraadt 283:
1.12 markus 284: /* Get message type, and verify that we got a proper answer. */
1.24 markus 285: type = buffer_get_char(&auth->identities);
1.29 markus 286: if (agent_failed(type)) {
1.30 markus 287: return 0;
1.25 markus 288: } else if (type != code2) {
1.24 markus 289: fatal("Bad authentication reply message type: %d", type);
1.25 markus 290: }
1.12 markus 291:
292: /* Get the number of entries in the response and check it for sanity. */
293: auth->howmany = buffer_get_int(&auth->identities);
1.62 miod 294: if ((u_int)auth->howmany > 1024)
1.37 millert 295: fatal("Too many identities in authentication reply: %d",
1.24 markus 296: auth->howmany);
1.12 markus 297:
1.30 markus 298: return auth->howmany;
299: }
300:
301: Key *
302: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
303: {
304: /* get number of identities and return the first entry (if any). */
305: if (ssh_get_num_identities(auth, version) > 0)
306: return ssh_get_next_identity(auth, comment, version);
307: return NULL;
1.1 deraadt 308: }
309:
1.25 markus 310: Key *
311: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 312: {
1.66 djm 313: int keybits;
1.31 markus 314: u_int bits;
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) {
1.25 markus 328: case 1:
1.30 markus 329: key = key_new(KEY_RSA1);
1.25 markus 330: bits = buffer_get_int(&auth->identities);
331: buffer_get_bignum(&auth->identities, key->rsa->e);
332: buffer_get_bignum(&auth->identities, key->rsa->n);
333: *comment = buffer_get_string(&auth->identities, NULL);
1.66 djm 334: keybits = BN_num_bits(key->rsa->n);
335: if (keybits < 0 || bits != (u_int)keybits)
1.59 itojun 336: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 337: BN_num_bits(key->rsa->n), bits);
338: break;
339: case 2:
340: blob = buffer_get_string(&auth->identities, &blen);
341: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 342: key = key_from_blob(blob, blen);
1.25 markus 343: xfree(blob);
344: break;
345: default:
346: return NULL;
347: }
1.12 markus 348: /* Decrement the number of remaining entries. */
349: auth->howmany--;
1.25 markus 350: return key;
1.1 deraadt 351: }
352:
1.14 markus 353: /*
354: * Generates a random challenge, sends it to the agent, and waits for
355: * response from the agent. Returns true (non-zero) if the agent gave the
356: * correct answer, zero otherwise. Response type selects the style of
357: * response desired, with 0 corresponding to protocol version 1.0 (no longer
358: * supported) and 1 corresponding to protocol version 1.1.
359: */
1.1 deraadt 360:
1.2 provos 361: int
362: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 363: Key* key, BIGNUM *challenge,
1.31 markus 364: u_char session_id[16],
365: u_int response_type,
366: u_char response[16])
1.1 deraadt 367: {
1.12 markus 368: Buffer buffer;
1.24 markus 369: int success = 0;
370: int i;
371: int type;
1.12 markus 372:
1.30 markus 373: if (key->type != KEY_RSA1)
1.25 markus 374: return 0;
375: if (response_type == 0) {
1.59 itojun 376: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 377: return 0;
378: }
1.12 markus 379: buffer_init(&buffer);
1.24 markus 380: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 381: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
382: buffer_put_bignum(&buffer, key->rsa->e);
383: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 384: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 385: buffer_append(&buffer, session_id, 16);
1.12 markus 386: buffer_put_int(&buffer, response_type);
387:
1.24 markus 388: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 389: buffer_free(&buffer);
390: return 0;
391: }
1.24 markus 392: type = buffer_get_char(&buffer);
1.12 markus 393:
1.29 markus 394: if (agent_failed(type)) {
1.59 itojun 395: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 396: } else if (type != SSH_AGENT_RSA_RESPONSE) {
397: fatal("Bad authentication response: %d", type);
398: } else {
399: success = 1;
400: /*
401: * Get the response from the packet. This will abort with a
402: * fatal error if the packet is corrupt.
403: */
404: for (i = 0; i < 16; i++)
1.73 deraadt 405: response[i] = (u_char)buffer_get_char(&buffer);
1.12 markus 406: }
407: buffer_free(&buffer);
1.24 markus 408: return success;
1.12 markus 409: }
1.1 deraadt 410:
1.25 markus 411: /* ask agent to sign data, returns -1 on error, 0 on success */
412: int
413: ssh_agent_sign(AuthenticationConnection *auth,
414: Key *key,
1.48 markus 415: u_char **sigp, u_int *lenp,
416: u_char *data, u_int datalen)
1.25 markus 417: {
1.28 markus 418: extern int datafellows;
1.25 markus 419: Buffer msg;
1.31 markus 420: u_char *blob;
421: u_int blen;
1.28 markus 422: int type, flags = 0;
1.25 markus 423: int ret = -1;
424:
1.30 markus 425: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 426: return -1;
427:
1.28 markus 428: if (datafellows & SSH_BUG_SIGBLOB)
429: flags = SSH_AGENT_OLD_SIGNATURE;
430:
1.25 markus 431: buffer_init(&msg);
432: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
433: buffer_put_string(&msg, blob, blen);
434: buffer_put_string(&msg, data, datalen);
1.28 markus 435: buffer_put_int(&msg, flags);
1.25 markus 436: xfree(blob);
437:
438: if (ssh_request_reply(auth, &msg, &msg) == 0) {
439: buffer_free(&msg);
440: return -1;
441: }
442: type = buffer_get_char(&msg);
1.29 markus 443: if (agent_failed(type)) {
1.59 itojun 444: logit("Agent admitted failure to sign using the key.");
1.25 markus 445: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
446: fatal("Bad authentication response: %d", type);
447: } else {
448: ret = 0;
449: *sigp = buffer_get_string(&msg, lenp);
450: }
451: buffer_free(&msg);
452: return ret;
453: }
454:
1.22 markus 455: /* Encode key for a message to the agent. */
456:
1.41 itojun 457: static void
1.30 markus 458: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 459: {
460: buffer_put_int(b, BN_num_bits(key->n));
461: buffer_put_bignum(b, key->n);
462: buffer_put_bignum(b, key->e);
463: buffer_put_bignum(b, key->d);
464: /* To keep within the protocol: p < q for ssh. in SSL p > q */
465: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
466: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
467: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 468: buffer_put_cstring(b, comment);
1.22 markus 469: }
470:
1.41 itojun 471: static void
1.30 markus 472: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 473: {
1.30 markus 474: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 475: switch (key->type) {
1.30 markus 476: case KEY_RSA:
477: buffer_put_bignum2(b, key->rsa->n);
478: buffer_put_bignum2(b, key->rsa->e);
479: buffer_put_bignum2(b, key->rsa->d);
480: buffer_put_bignum2(b, key->rsa->iqmp);
481: buffer_put_bignum2(b, key->rsa->p);
482: buffer_put_bignum2(b, key->rsa->q);
483: break;
1.82 ! djm 484: case KEY_RSA_CERT:
! 485: if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0)
! 486: fatal("%s: no cert/certblob", __func__);
! 487: buffer_put_string(b, buffer_ptr(&key->cert->certblob),
! 488: buffer_len(&key->cert->certblob));
! 489: buffer_put_bignum2(b, key->rsa->d);
! 490: buffer_put_bignum2(b, key->rsa->iqmp);
! 491: buffer_put_bignum2(b, key->rsa->p);
! 492: buffer_put_bignum2(b, key->rsa->q);
! 493: break;
1.30 markus 494: case KEY_DSA:
495: buffer_put_bignum2(b, key->dsa->p);
496: buffer_put_bignum2(b, key->dsa->q);
497: buffer_put_bignum2(b, key->dsa->g);
498: buffer_put_bignum2(b, key->dsa->pub_key);
499: buffer_put_bignum2(b, key->dsa->priv_key);
500: break;
1.82 ! djm 501: case KEY_DSA_CERT:
! 502: if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0)
! 503: fatal("%s: no cert/certblob", __func__);
! 504: buffer_put_string(b, buffer_ptr(&key->cert->certblob),
! 505: buffer_len(&key->cert->certblob));
! 506: buffer_put_bignum2(b, key->dsa->priv_key);
! 507: break;
1.30 markus 508: }
509: buffer_put_cstring(b, comment);
1.22 markus 510: }
511:
1.14 markus 512: /*
513: * Adds an identity to the authentication server. This call is not meant to
514: * be used by normal applications.
515: */
1.1 deraadt 516:
1.18 markus 517: int
1.54 markus 518: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 519: const char *comment, u_int life, u_int confirm)
1.1 deraadt 520: {
1.25 markus 521: Buffer msg;
1.58 markus 522: int type, constrained = (life || confirm);
1.12 markus 523:
1.25 markus 524: buffer_init(&msg);
1.22 markus 525:
526: switch (key->type) {
1.30 markus 527: case KEY_RSA1:
1.54 markus 528: type = constrained ?
529: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
530: SSH_AGENTC_ADD_RSA_IDENTITY;
531: buffer_put_char(&msg, type);
1.30 markus 532: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
533: break;
1.22 markus 534: case KEY_RSA:
1.82 ! djm 535: case KEY_RSA_CERT:
1.22 markus 536: case KEY_DSA:
1.82 ! djm 537: case KEY_DSA_CERT:
1.54 markus 538: type = constrained ?
539: SSH2_AGENTC_ADD_ID_CONSTRAINED :
540: SSH2_AGENTC_ADD_IDENTITY;
541: buffer_put_char(&msg, type);
1.30 markus 542: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 543: break;
544: default:
1.25 markus 545: buffer_free(&msg);
1.22 markus 546: return 0;
547: }
1.54 markus 548: if (constrained) {
549: if (life != 0) {
550: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
551: buffer_put_int(&msg, life);
552: }
1.58 markus 553: if (confirm != 0)
554: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 555: }
1.25 markus 556: if (ssh_request_reply(auth, &msg, &msg) == 0) {
557: buffer_free(&msg);
1.12 markus 558: return 0;
559: }
1.25 markus 560: type = buffer_get_char(&msg);
561: buffer_free(&msg);
1.24 markus 562: return decode_reply(type);
1.54 markus 563: }
564:
1.14 markus 565: /*
566: * Removes an identity from the authentication server. This call is not
567: * meant to be used by normal applications.
568: */
1.1 deraadt 569:
1.18 markus 570: int
1.25 markus 571: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 572: {
1.25 markus 573: Buffer msg;
1.24 markus 574: int type;
1.31 markus 575: u_char *blob;
576: u_int blen;
1.12 markus 577:
1.25 markus 578: buffer_init(&msg);
1.12 markus 579:
1.30 markus 580: if (key->type == KEY_RSA1) {
1.25 markus 581: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
582: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
583: buffer_put_bignum(&msg, key->rsa->e);
584: buffer_put_bignum(&msg, key->rsa->n);
1.82 ! djm 585: } else if (key_type_plain(key->type) == KEY_DSA ||
! 586: key_type_plain(key->type) == KEY_RSA) {
1.30 markus 587: key_to_blob(key, &blob, &blen);
1.25 markus 588: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 589: buffer_put_string(&msg, blob, blen);
590: xfree(blob);
591: } else {
592: buffer_free(&msg);
593: return 0;
594: }
1.42 markus 595: if (ssh_request_reply(auth, &msg, &msg) == 0) {
596: buffer_free(&msg);
597: return 0;
598: }
599: type = buffer_get_char(&msg);
600: buffer_free(&msg);
601: return decode_reply(type);
602: }
603:
604: int
1.63 djm 605: ssh_update_card(AuthenticationConnection *auth, int add,
1.60 djm 606: const char *reader_id, const char *pin, u_int life, u_int confirm)
1.42 markus 607: {
608: Buffer msg;
1.60 djm 609: int type, constrained = (life || confirm);
610:
611: if (add) {
612: type = constrained ?
613: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
614: SSH_AGENTC_ADD_SMARTCARD_KEY;
615: } else
616: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 617:
618: buffer_init(&msg);
1.60 djm 619: buffer_put_char(&msg, type);
1.43 markus 620: buffer_put_cstring(&msg, reader_id);
1.49 rees 621: buffer_put_cstring(&msg, pin);
1.63 djm 622:
1.60 djm 623: if (constrained) {
624: if (life != 0) {
625: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
626: buffer_put_int(&msg, life);
627: }
628: if (confirm != 0)
629: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
630: }
631:
1.25 markus 632: if (ssh_request_reply(auth, &msg, &msg) == 0) {
633: buffer_free(&msg);
1.12 markus 634: return 0;
635: }
1.25 markus 636: type = buffer_get_char(&msg);
637: buffer_free(&msg);
1.24 markus 638: return decode_reply(type);
1.12 markus 639: }
640:
1.14 markus 641: /*
642: * Removes all identities from the agent. This call is not meant to be used
643: * by normal applications.
644: */
1.1 deraadt 645:
1.18 markus 646: int
1.25 markus 647: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 648: {
1.25 markus 649: Buffer msg;
1.24 markus 650: int type;
1.25 markus 651: int code = (version==1) ?
652: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
653: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 654:
1.25 markus 655: buffer_init(&msg);
656: buffer_put_char(&msg, code);
1.12 markus 657:
1.25 markus 658: if (ssh_request_reply(auth, &msg, &msg) == 0) {
659: buffer_free(&msg);
1.12 markus 660: return 0;
661: }
1.25 markus 662: type = buffer_get_char(&msg);
663: buffer_free(&msg);
1.24 markus 664: return decode_reply(type);
1.21 markus 665: }
666:
1.35 stevesk 667: int
1.24 markus 668: decode_reply(int type)
1.21 markus 669: {
1.12 markus 670: switch (type) {
671: case SSH_AGENT_FAILURE:
1.29 markus 672: case SSH_COM_AGENT2_FAILURE:
1.44 markus 673: case SSH2_AGENT_FAILURE:
1.59 itojun 674: logit("SSH_AGENT_FAILURE");
1.12 markus 675: return 0;
676: case SSH_AGENT_SUCCESS:
677: return 1;
678: default:
1.21 markus 679: fatal("Bad response from authentication agent: %d", type);
1.12 markus 680: }
681: /* NOTREACHED */
682: return 0;
683: }
![[BACK]](/icons/back.gif){kind=icon}
Return to authfd.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh