Annotation of src/usr.bin/ssh/authfd.c, Revision 1.64.4.1
1.1 deraadt 1: /*
1.13 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
1.27 deraadt 5: * Functions for connecting the local authentication agent.
1.18 markus 6: *
1.27 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.18 markus 12: *
1.25 markus 13: * SSH2 implementation,
1.27 deraadt 14: * Copyright (c) 2000 Markus Friedl. All rights reserved.
1.25 markus 15: *
1.27 deraadt 16: * Redistribution and use in source and binary forms, with or without
17: * modification, are permitted provided that the following conditions
18: * are met:
19: * 1. Redistributions of source code must retain the above copyright
20: * notice, this list of conditions and the following disclaimer.
21: * 2. Redistributions in binary form must reproduce the above copyright
22: * notice, this list of conditions and the following disclaimer in the
23: * documentation and/or other materials provided with the distribution.
24: *
25: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.13 deraadt 35: */
1.1 deraadt 36:
37: #include "includes.h"
1.64.4.1! brad 38: RCSID("$OpenBSD: authfd.c,v 1.66 2005/06/17 02:44:32 djm Exp $");
1.33 markus 39:
40: #include <openssl/evp.h>
1.1 deraadt 41:
42: #include "ssh.h"
43: #include "rsa.h"
44: #include "buffer.h"
45: #include "bufaux.h"
46: #include "xmalloc.h"
47: #include "getput.h"
1.22 markus 48: #include "key.h"
49: #include "authfd.h"
1.33 markus 50: #include "cipher.h"
1.22 markus 51: #include "kex.h"
1.28 markus 52: #include "compat.h"
1.33 markus 53: #include "log.h"
54: #include "atomicio.h"
1.2 provos 55:
1.57 stevesk 56: static int agent_present = 0;
57:
1.21 markus 58: /* helper */
1.24 markus 59: int decode_reply(int type);
1.21 markus 60:
1.29 markus 61: /* macro to check for "agent failure" message */
62: #define agent_failed(x) \
1.44 markus 63: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 64: (x == SSH2_AGENT_FAILURE))
1.29 markus 65:
1.57 stevesk 66: int
67: ssh_agent_present(void)
68: {
69: int authfd;
70:
71: if (agent_present)
72: return 1;
73: if ((authfd = ssh_get_authentication_socket()) == -1)
74: return 0;
75: else {
76: ssh_close_authentication_socket(authfd);
77: return 1;
78: }
79: }
80:
1.1 deraadt 81: /* Returns the number of the authentication fd, or -1 if there is none. */
82:
1.2 provos 83: int
1.32 markus 84: ssh_get_authentication_socket(void)
1.1 deraadt 85: {
1.12 markus 86: const char *authsocket;
1.45 stevesk 87: int sock;
1.12 markus 88: struct sockaddr_un sunaddr;
89:
90: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
91: if (!authsocket)
92: return -1;
93:
94: sunaddr.sun_family = AF_UNIX;
95: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
96:
97: sock = socket(AF_UNIX, SOCK_STREAM, 0);
98: if (sock < 0)
99: return -1;
100:
101: /* close on exec */
102: if (fcntl(sock, F_SETFD, 1) == -1) {
103: close(sock);
104: return -1;
105: }
1.45 stevesk 106: if (connect(sock, (struct sockaddr *) &sunaddr, sizeof sunaddr) < 0) {
1.12 markus 107: close(sock);
108: return -1;
109: }
1.57 stevesk 110: agent_present = 1;
1.12 markus 111: return sock;
1.1 deraadt 112: }
113:
1.41 itojun 114: static int
1.25 markus 115: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 116: {
1.64.4.1! brad 117: u_int l, len;
1.24 markus 118: char buf[1024];
119:
120: /* Get the length of the message, and format it in the buffer. */
121: len = buffer_len(request);
122: PUT_32BIT(buf, len);
123:
124: /* Send the length and then the packet to the agent. */
1.61 deraadt 125: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
126: atomicio(vwrite, auth->fd, buffer_ptr(request),
1.24 markus 127: buffer_len(request)) != buffer_len(request)) {
128: error("Error writing to authentication socket.");
129: return 0;
130: }
131: /*
132: * Wait for response from the agent. First read the length of the
133: * response packet.
134: */
1.64 avsm 135: if (atomicio(read, auth->fd, buf, 4) != 4) {
136: error("Error reading response length from authentication socket.");
137: return 0;
1.24 markus 138: }
139:
140: /* Extract the length, and check it for sanity. */
141: len = GET_32BIT(buf);
142: if (len > 256 * 1024)
1.62 miod 143: fatal("Authentication response too long: %u", len);
1.24 markus 144:
145: /* Read the rest of the response in to the buffer. */
146: buffer_clear(reply);
147: while (len > 0) {
148: l = len;
149: if (l > sizeof(buf))
150: l = sizeof(buf);
1.64.4.1! brad 151: if (atomicio(read, auth->fd, buf, l) != l) {
1.24 markus 152: error("Error reading response from authentication socket.");
153: return 0;
154: }
1.56 markus 155: buffer_append(reply, buf, l);
1.24 markus 156: len -= l;
157: }
158: return 1;
159: }
160:
1.14 markus 161: /*
162: * Closes the agent socket if it should be closed (depends on how it was
163: * obtained). The argument must have been returned by
164: * ssh_get_authentication_socket().
165: */
1.1 deraadt 166:
1.18 markus 167: void
1.12 markus 168: ssh_close_authentication_socket(int sock)
1.1 deraadt 169: {
1.12 markus 170: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
171: close(sock);
1.1 deraadt 172: }
173:
1.14 markus 174: /*
175: * Opens and connects a private socket for communication with the
176: * authentication agent. Returns the file descriptor (which must be
177: * shut down and closed by the caller when no longer needed).
178: * Returns NULL if an error occurred and the connection could not be
179: * opened.
180: */
1.1 deraadt 181:
1.12 markus 182: AuthenticationConnection *
1.32 markus 183: ssh_get_authentication_connection(void)
1.1 deraadt 184: {
1.12 markus 185: AuthenticationConnection *auth;
186: int sock;
1.1 deraadt 187:
1.12 markus 188: sock = ssh_get_authentication_socket();
189:
1.14 markus 190: /*
191: * Fail if we couldn't obtain a connection. This happens if we
192: * exited due to a timeout.
193: */
1.12 markus 194: if (sock < 0)
195: return NULL;
196:
197: auth = xmalloc(sizeof(*auth));
198: auth->fd = sock;
199: buffer_init(&auth->identities);
200: auth->howmany = 0;
201:
202: return auth;
1.1 deraadt 203: }
204:
1.14 markus 205: /*
206: * Closes the connection to the authentication agent and frees any associated
207: * memory.
208: */
1.1 deraadt 209:
1.18 markus 210: void
1.25 markus 211: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 212: {
1.25 markus 213: buffer_free(&auth->identities);
214: close(auth->fd);
215: xfree(auth);
1.50 markus 216: }
217:
218: /* Lock/unlock agent */
219: int
220: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
221: {
222: int type;
223: Buffer msg;
224:
225: buffer_init(&msg);
226: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
227: buffer_put_cstring(&msg, password);
228:
229: if (ssh_request_reply(auth, &msg, &msg) == 0) {
230: buffer_free(&msg);
231: return 0;
232: }
233: type = buffer_get_char(&msg);
234: buffer_free(&msg);
235: return decode_reply(type);
1.1 deraadt 236: }
237:
1.14 markus 238: /*
239: * Returns the first authentication identity held by the agent.
240: */
1.1 deraadt 241:
1.30 markus 242: int
243: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 244: {
1.25 markus 245: int type, code1 = 0, code2 = 0;
1.24 markus 246: Buffer request;
1.25 markus 247:
1.46 deraadt 248: switch (version) {
1.25 markus 249: case 1:
250: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
251: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
252: break;
253: case 2:
254: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
255: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
256: break;
257: default:
1.30 markus 258: return 0;
1.25 markus 259: }
1.1 deraadt 260:
1.14 markus 261: /*
262: * Send a message to the agent requesting for a list of the
263: * identities it can represent.
264: */
1.24 markus 265: buffer_init(&request);
1.25 markus 266: buffer_put_char(&request, code1);
1.12 markus 267:
268: buffer_clear(&auth->identities);
1.24 markus 269: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
270: buffer_free(&request);
1.30 markus 271: return 0;
1.12 markus 272: }
1.24 markus 273: buffer_free(&request);
1.1 deraadt 274:
1.12 markus 275: /* Get message type, and verify that we got a proper answer. */
1.24 markus 276: type = buffer_get_char(&auth->identities);
1.29 markus 277: if (agent_failed(type)) {
1.30 markus 278: return 0;
1.25 markus 279: } else if (type != code2) {
1.24 markus 280: fatal("Bad authentication reply message type: %d", type);
1.25 markus 281: }
1.12 markus 282:
283: /* Get the number of entries in the response and check it for sanity. */
284: auth->howmany = buffer_get_int(&auth->identities);
1.62 miod 285: if ((u_int)auth->howmany > 1024)
1.37 millert 286: fatal("Too many identities in authentication reply: %d",
1.24 markus 287: auth->howmany);
1.12 markus 288:
1.30 markus 289: return auth->howmany;
290: }
291:
292: Key *
293: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
294: {
295: /* get number of identities and return the first entry (if any). */
296: if (ssh_get_num_identities(auth, version) > 0)
297: return ssh_get_next_identity(auth, comment, version);
298: return NULL;
1.1 deraadt 299: }
300:
1.25 markus 301: Key *
302: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 303: {
1.64.4.1! brad 304: int keybits;
1.31 markus 305: u_int bits;
306: u_char *blob;
307: u_int blen;
1.25 markus 308: Key *key = NULL;
1.9 markus 309:
1.12 markus 310: /* Return failure if no more entries. */
311: if (auth->howmany <= 0)
1.25 markus 312: return NULL;
1.12 markus 313:
1.14 markus 314: /*
315: * Get the next entry from the packet. These will abort with a fatal
316: * error if the packet is too short or contains corrupt data.
317: */
1.46 deraadt 318: switch (version) {
1.25 markus 319: case 1:
1.30 markus 320: key = key_new(KEY_RSA1);
1.25 markus 321: bits = buffer_get_int(&auth->identities);
322: buffer_get_bignum(&auth->identities, key->rsa->e);
323: buffer_get_bignum(&auth->identities, key->rsa->n);
324: *comment = buffer_get_string(&auth->identities, NULL);
1.64.4.1! brad 325: keybits = BN_num_bits(key->rsa->n);
! 326: if (keybits < 0 || bits != (u_int)keybits)
1.59 itojun 327: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 328: BN_num_bits(key->rsa->n), bits);
329: break;
330: case 2:
331: blob = buffer_get_string(&auth->identities, &blen);
332: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 333: key = key_from_blob(blob, blen);
1.25 markus 334: xfree(blob);
335: break;
336: default:
337: return NULL;
338: break;
339: }
1.12 markus 340: /* Decrement the number of remaining entries. */
341: auth->howmany--;
1.25 markus 342: return key;
1.1 deraadt 343: }
344:
1.14 markus 345: /*
346: * Generates a random challenge, sends it to the agent, and waits for
347: * response from the agent. Returns true (non-zero) if the agent gave the
348: * correct answer, zero otherwise. Response type selects the style of
349: * response desired, with 0 corresponding to protocol version 1.0 (no longer
350: * supported) and 1 corresponding to protocol version 1.1.
351: */
1.1 deraadt 352:
1.2 provos 353: int
354: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 355: Key* key, BIGNUM *challenge,
1.31 markus 356: u_char session_id[16],
357: u_int response_type,
358: u_char response[16])
1.1 deraadt 359: {
1.12 markus 360: Buffer buffer;
1.24 markus 361: int success = 0;
362: int i;
363: int type;
1.12 markus 364:
1.30 markus 365: if (key->type != KEY_RSA1)
1.25 markus 366: return 0;
367: if (response_type == 0) {
1.59 itojun 368: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 369: return 0;
370: }
1.12 markus 371: buffer_init(&buffer);
1.24 markus 372: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 373: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
374: buffer_put_bignum(&buffer, key->rsa->e);
375: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 376: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 377: buffer_append(&buffer, session_id, 16);
1.12 markus 378: buffer_put_int(&buffer, response_type);
379:
1.24 markus 380: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 381: buffer_free(&buffer);
382: return 0;
383: }
1.24 markus 384: type = buffer_get_char(&buffer);
1.12 markus 385:
1.29 markus 386: if (agent_failed(type)) {
1.59 itojun 387: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 388: } else if (type != SSH_AGENT_RSA_RESPONSE) {
389: fatal("Bad authentication response: %d", type);
390: } else {
391: success = 1;
392: /*
393: * Get the response from the packet. This will abort with a
394: * fatal error if the packet is corrupt.
395: */
396: for (i = 0; i < 16; i++)
397: response[i] = buffer_get_char(&buffer);
1.12 markus 398: }
399: buffer_free(&buffer);
1.24 markus 400: return success;
1.12 markus 401: }
1.1 deraadt 402:
1.25 markus 403: /* ask agent to sign data, returns -1 on error, 0 on success */
404: int
405: ssh_agent_sign(AuthenticationConnection *auth,
406: Key *key,
1.48 markus 407: u_char **sigp, u_int *lenp,
408: u_char *data, u_int datalen)
1.25 markus 409: {
1.28 markus 410: extern int datafellows;
1.25 markus 411: Buffer msg;
1.31 markus 412: u_char *blob;
413: u_int blen;
1.28 markus 414: int type, flags = 0;
1.25 markus 415: int ret = -1;
416:
1.30 markus 417: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 418: return -1;
419:
1.28 markus 420: if (datafellows & SSH_BUG_SIGBLOB)
421: flags = SSH_AGENT_OLD_SIGNATURE;
422:
1.25 markus 423: buffer_init(&msg);
424: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
425: buffer_put_string(&msg, blob, blen);
426: buffer_put_string(&msg, data, datalen);
1.28 markus 427: buffer_put_int(&msg, flags);
1.25 markus 428: xfree(blob);
429:
430: if (ssh_request_reply(auth, &msg, &msg) == 0) {
431: buffer_free(&msg);
432: return -1;
433: }
434: type = buffer_get_char(&msg);
1.29 markus 435: if (agent_failed(type)) {
1.59 itojun 436: logit("Agent admitted failure to sign using the key.");
1.25 markus 437: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
438: fatal("Bad authentication response: %d", type);
439: } else {
440: ret = 0;
441: *sigp = buffer_get_string(&msg, lenp);
442: }
443: buffer_free(&msg);
444: return ret;
445: }
446:
1.22 markus 447: /* Encode key for a message to the agent. */
448:
1.41 itojun 449: static void
1.30 markus 450: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 451: {
452: buffer_put_int(b, BN_num_bits(key->n));
453: buffer_put_bignum(b, key->n);
454: buffer_put_bignum(b, key->e);
455: buffer_put_bignum(b, key->d);
456: /* To keep within the protocol: p < q for ssh. in SSL p > q */
457: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
458: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
459: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 460: buffer_put_cstring(b, comment);
1.22 markus 461: }
462:
1.41 itojun 463: static void
1.30 markus 464: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 465: {
1.30 markus 466: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 467: switch (key->type) {
1.30 markus 468: case KEY_RSA:
469: buffer_put_bignum2(b, key->rsa->n);
470: buffer_put_bignum2(b, key->rsa->e);
471: buffer_put_bignum2(b, key->rsa->d);
472: buffer_put_bignum2(b, key->rsa->iqmp);
473: buffer_put_bignum2(b, key->rsa->p);
474: buffer_put_bignum2(b, key->rsa->q);
475: break;
476: case KEY_DSA:
477: buffer_put_bignum2(b, key->dsa->p);
478: buffer_put_bignum2(b, key->dsa->q);
479: buffer_put_bignum2(b, key->dsa->g);
480: buffer_put_bignum2(b, key->dsa->pub_key);
481: buffer_put_bignum2(b, key->dsa->priv_key);
482: break;
483: }
484: buffer_put_cstring(b, comment);
1.22 markus 485: }
486:
1.14 markus 487: /*
488: * Adds an identity to the authentication server. This call is not meant to
489: * be used by normal applications.
490: */
1.1 deraadt 491:
1.18 markus 492: int
1.54 markus 493: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 494: const char *comment, u_int life, u_int confirm)
1.1 deraadt 495: {
1.25 markus 496: Buffer msg;
1.58 markus 497: int type, constrained = (life || confirm);
1.12 markus 498:
1.25 markus 499: buffer_init(&msg);
1.22 markus 500:
501: switch (key->type) {
1.30 markus 502: case KEY_RSA1:
1.54 markus 503: type = constrained ?
504: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
505: SSH_AGENTC_ADD_RSA_IDENTITY;
506: buffer_put_char(&msg, type);
1.30 markus 507: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
508: break;
1.22 markus 509: case KEY_RSA:
510: case KEY_DSA:
1.54 markus 511: type = constrained ?
512: SSH2_AGENTC_ADD_ID_CONSTRAINED :
513: SSH2_AGENTC_ADD_IDENTITY;
514: buffer_put_char(&msg, type);
1.30 markus 515: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 516: break;
517: default:
1.25 markus 518: buffer_free(&msg);
1.22 markus 519: return 0;
520: break;
521: }
1.54 markus 522: if (constrained) {
523: if (life != 0) {
524: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
525: buffer_put_int(&msg, life);
526: }
1.58 markus 527: if (confirm != 0)
528: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 529: }
1.25 markus 530: if (ssh_request_reply(auth, &msg, &msg) == 0) {
531: buffer_free(&msg);
1.12 markus 532: return 0;
533: }
1.25 markus 534: type = buffer_get_char(&msg);
535: buffer_free(&msg);
1.24 markus 536: return decode_reply(type);
1.12 markus 537: }
1.1 deraadt 538:
1.54 markus 539: int
540: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
541: {
1.58 markus 542: return ssh_add_identity_constrained(auth, key, comment, 0, 0);
1.54 markus 543: }
544:
1.14 markus 545: /*
546: * Removes an identity from the authentication server. This call is not
547: * meant to be used by normal applications.
548: */
1.1 deraadt 549:
1.18 markus 550: int
1.25 markus 551: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 552: {
1.25 markus 553: Buffer msg;
1.24 markus 554: int type;
1.31 markus 555: u_char *blob;
556: u_int blen;
1.12 markus 557:
1.25 markus 558: buffer_init(&msg);
1.12 markus 559:
1.30 markus 560: if (key->type == KEY_RSA1) {
1.25 markus 561: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
562: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
563: buffer_put_bignum(&msg, key->rsa->e);
564: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 565: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
566: key_to_blob(key, &blob, &blen);
1.25 markus 567: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 568: buffer_put_string(&msg, blob, blen);
569: xfree(blob);
570: } else {
571: buffer_free(&msg);
572: return 0;
573: }
1.42 markus 574: if (ssh_request_reply(auth, &msg, &msg) == 0) {
575: buffer_free(&msg);
576: return 0;
577: }
578: type = buffer_get_char(&msg);
579: buffer_free(&msg);
580: return decode_reply(type);
581: }
582:
583: int
1.63 djm 584: ssh_update_card(AuthenticationConnection *auth, int add,
1.60 djm 585: const char *reader_id, const char *pin, u_int life, u_int confirm)
1.42 markus 586: {
587: Buffer msg;
1.60 djm 588: int type, constrained = (life || confirm);
589:
590: if (add) {
591: type = constrained ?
592: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
593: SSH_AGENTC_ADD_SMARTCARD_KEY;
594: } else
595: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 596:
597: buffer_init(&msg);
1.60 djm 598: buffer_put_char(&msg, type);
1.43 markus 599: buffer_put_cstring(&msg, reader_id);
1.49 rees 600: buffer_put_cstring(&msg, pin);
1.63 djm 601:
1.60 djm 602: if (constrained) {
603: if (life != 0) {
604: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
605: buffer_put_int(&msg, life);
606: }
607: if (confirm != 0)
608: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
609: }
610:
1.25 markus 611: if (ssh_request_reply(auth, &msg, &msg) == 0) {
612: buffer_free(&msg);
1.12 markus 613: return 0;
614: }
1.25 markus 615: type = buffer_get_char(&msg);
616: buffer_free(&msg);
1.24 markus 617: return decode_reply(type);
1.12 markus 618: }
619:
1.14 markus 620: /*
621: * Removes all identities from the agent. This call is not meant to be used
622: * by normal applications.
623: */
1.1 deraadt 624:
1.18 markus 625: int
1.25 markus 626: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 627: {
1.25 markus 628: Buffer msg;
1.24 markus 629: int type;
1.25 markus 630: int code = (version==1) ?
631: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
632: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 633:
1.25 markus 634: buffer_init(&msg);
635: buffer_put_char(&msg, code);
1.12 markus 636:
1.25 markus 637: if (ssh_request_reply(auth, &msg, &msg) == 0) {
638: buffer_free(&msg);
1.12 markus 639: return 0;
640: }
1.25 markus 641: type = buffer_get_char(&msg);
642: buffer_free(&msg);
1.24 markus 643: return decode_reply(type);
1.21 markus 644: }
645:
1.35 stevesk 646: int
1.24 markus 647: decode_reply(int type)
1.21 markus 648: {
1.12 markus 649: switch (type) {
650: case SSH_AGENT_FAILURE:
1.29 markus 651: case SSH_COM_AGENT2_FAILURE:
1.44 markus 652: case SSH2_AGENT_FAILURE:
1.59 itojun 653: logit("SSH_AGENT_FAILURE");
1.12 markus 654: return 0;
655: case SSH_AGENT_SUCCESS:
656: return 1;
657: default:
1.21 markus 658: fatal("Bad response from authentication agent: %d", type);
1.12 markus 659: }
660: /* NOTREACHED */
661: return 0;
662: }
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