Annotation of src/usr.bin/ssh/authfd.c, Revision 1.71
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"
1.67 stevesk 38:
39: #include <sys/types.h>
40: #include <sys/un.h>
1.33 markus 41:
42: #include <openssl/evp.h>
1.1 deraadt 43:
44: #include "ssh.h"
45: #include "rsa.h"
46: #include "buffer.h"
47: #include "bufaux.h"
48: #include "xmalloc.h"
49: #include "getput.h"
1.22 markus 50: #include "key.h"
51: #include "authfd.h"
1.33 markus 52: #include "cipher.h"
1.22 markus 53: #include "kex.h"
1.28 markus 54: #include "compat.h"
1.33 markus 55: #include "log.h"
56: #include "atomicio.h"
1.2 provos 57:
1.57 stevesk 58: static int agent_present = 0;
59:
1.21 markus 60: /* helper */
1.24 markus 61: int decode_reply(int type);
1.21 markus 62:
1.29 markus 63: /* macro to check for "agent failure" message */
64: #define agent_failed(x) \
1.44 markus 65: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 66: (x == SSH2_AGENT_FAILURE))
1.29 markus 67:
1.57 stevesk 68: int
69: ssh_agent_present(void)
70: {
71: int authfd;
72:
73: if (agent_present)
74: return 1;
75: if ((authfd = ssh_get_authentication_socket()) == -1)
76: return 0;
77: else {
78: ssh_close_authentication_socket(authfd);
79: return 1;
80: }
81: }
82:
1.1 deraadt 83: /* Returns the number of the authentication fd, or -1 if there is none. */
84:
1.2 provos 85: int
1.32 markus 86: ssh_get_authentication_socket(void)
1.1 deraadt 87: {
1.12 markus 88: const char *authsocket;
1.45 stevesk 89: int sock;
1.12 markus 90: struct sockaddr_un sunaddr;
91:
92: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
93: if (!authsocket)
94: return -1;
95:
96: sunaddr.sun_family = AF_UNIX;
97: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
98:
99: sock = socket(AF_UNIX, SOCK_STREAM, 0);
100: if (sock < 0)
101: return -1;
102:
103: /* close on exec */
104: if (fcntl(sock, F_SETFD, 1) == -1) {
105: close(sock);
106: return -1;
107: }
1.71 ! deraadt 108: if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) {
1.12 markus 109: close(sock);
110: return -1;
111: }
1.57 stevesk 112: agent_present = 1;
1.12 markus 113: return sock;
1.1 deraadt 114: }
115:
1.41 itojun 116: static int
1.25 markus 117: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 118: {
1.66 djm 119: u_int l, len;
1.24 markus 120: char buf[1024];
121:
122: /* Get the length of the message, and format it in the buffer. */
123: len = buffer_len(request);
124: PUT_32BIT(buf, len);
125:
126: /* Send the length and then the packet to the agent. */
1.61 deraadt 127: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
128: atomicio(vwrite, auth->fd, buffer_ptr(request),
1.24 markus 129: buffer_len(request)) != buffer_len(request)) {
130: error("Error writing to authentication socket.");
131: return 0;
132: }
133: /*
134: * Wait for response from the agent. First read the length of the
135: * response packet.
136: */
1.64 avsm 137: if (atomicio(read, auth->fd, buf, 4) != 4) {
138: error("Error reading response length from authentication socket.");
139: return 0;
1.24 markus 140: }
141:
142: /* Extract the length, and check it for sanity. */
143: len = GET_32BIT(buf);
144: if (len > 256 * 1024)
1.62 miod 145: fatal("Authentication response too long: %u", len);
1.24 markus 146:
147: /* Read the rest of the response in to the buffer. */
148: buffer_clear(reply);
149: while (len > 0) {
150: l = len;
151: if (l > sizeof(buf))
152: l = sizeof(buf);
1.65 avsm 153: if (atomicio(read, auth->fd, buf, l) != l) {
1.24 markus 154: error("Error reading response from authentication socket.");
155: return 0;
156: }
1.56 markus 157: buffer_append(reply, buf, l);
1.24 markus 158: len -= l;
159: }
160: return 1;
161: }
162:
1.14 markus 163: /*
164: * Closes the agent socket if it should be closed (depends on how it was
165: * obtained). The argument must have been returned by
166: * ssh_get_authentication_socket().
167: */
1.1 deraadt 168:
1.18 markus 169: void
1.12 markus 170: ssh_close_authentication_socket(int sock)
1.1 deraadt 171: {
1.12 markus 172: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
173: close(sock);
1.1 deraadt 174: }
175:
1.14 markus 176: /*
177: * Opens and connects a private socket for communication with the
178: * authentication agent. Returns the file descriptor (which must be
179: * shut down and closed by the caller when no longer needed).
180: * Returns NULL if an error occurred and the connection could not be
181: * opened.
182: */
1.1 deraadt 183:
1.12 markus 184: AuthenticationConnection *
1.32 markus 185: ssh_get_authentication_connection(void)
1.1 deraadt 186: {
1.12 markus 187: AuthenticationConnection *auth;
188: int sock;
1.1 deraadt 189:
1.12 markus 190: sock = ssh_get_authentication_socket();
191:
1.14 markus 192: /*
193: * Fail if we couldn't obtain a connection. This happens if we
194: * exited due to a timeout.
195: */
1.12 markus 196: if (sock < 0)
197: return NULL;
198:
199: auth = xmalloc(sizeof(*auth));
200: auth->fd = sock;
201: buffer_init(&auth->identities);
202: auth->howmany = 0;
203:
204: return auth;
1.1 deraadt 205: }
206:
1.14 markus 207: /*
208: * Closes the connection to the authentication agent and frees any associated
209: * memory.
210: */
1.1 deraadt 211:
1.18 markus 212: void
1.25 markus 213: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 214: {
1.25 markus 215: buffer_free(&auth->identities);
216: close(auth->fd);
217: xfree(auth);
1.50 markus 218: }
219:
220: /* Lock/unlock agent */
221: int
222: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
223: {
224: int type;
225: Buffer msg;
226:
227: buffer_init(&msg);
228: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
229: buffer_put_cstring(&msg, password);
230:
231: if (ssh_request_reply(auth, &msg, &msg) == 0) {
232: buffer_free(&msg);
233: return 0;
234: }
235: type = buffer_get_char(&msg);
236: buffer_free(&msg);
237: return decode_reply(type);
1.1 deraadt 238: }
239:
1.14 markus 240: /*
241: * Returns the first authentication identity held by the agent.
242: */
1.1 deraadt 243:
1.30 markus 244: int
245: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 246: {
1.25 markus 247: int type, code1 = 0, code2 = 0;
1.24 markus 248: Buffer request;
1.25 markus 249:
1.46 deraadt 250: switch (version) {
1.25 markus 251: case 1:
252: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
253: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
254: break;
255: case 2:
256: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
257: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
258: break;
259: default:
1.30 markus 260: return 0;
1.25 markus 261: }
1.1 deraadt 262:
1.14 markus 263: /*
264: * Send a message to the agent requesting for a list of the
265: * identities it can represent.
266: */
1.24 markus 267: buffer_init(&request);
1.25 markus 268: buffer_put_char(&request, code1);
1.12 markus 269:
270: buffer_clear(&auth->identities);
1.24 markus 271: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
272: buffer_free(&request);
1.30 markus 273: return 0;
1.12 markus 274: }
1.24 markus 275: buffer_free(&request);
1.1 deraadt 276:
1.12 markus 277: /* Get message type, and verify that we got a proper answer. */
1.24 markus 278: type = buffer_get_char(&auth->identities);
1.29 markus 279: if (agent_failed(type)) {
1.30 markus 280: return 0;
1.25 markus 281: } else if (type != code2) {
1.24 markus 282: fatal("Bad authentication reply message type: %d", type);
1.25 markus 283: }
1.12 markus 284:
285: /* Get the number of entries in the response and check it for sanity. */
286: auth->howmany = buffer_get_int(&auth->identities);
1.62 miod 287: if ((u_int)auth->howmany > 1024)
1.37 millert 288: fatal("Too many identities in authentication reply: %d",
1.24 markus 289: auth->howmany);
1.12 markus 290:
1.30 markus 291: return auth->howmany;
292: }
293:
294: Key *
295: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
296: {
297: /* get number of identities and return the first entry (if any). */
298: if (ssh_get_num_identities(auth, version) > 0)
299: return ssh_get_next_identity(auth, comment, version);
300: return NULL;
1.1 deraadt 301: }
302:
1.25 markus 303: Key *
304: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 305: {
1.66 djm 306: int keybits;
1.31 markus 307: u_int bits;
308: u_char *blob;
309: u_int blen;
1.25 markus 310: Key *key = NULL;
1.9 markus 311:
1.12 markus 312: /* Return failure if no more entries. */
313: if (auth->howmany <= 0)
1.25 markus 314: return NULL;
1.12 markus 315:
1.14 markus 316: /*
317: * Get the next entry from the packet. These will abort with a fatal
318: * error if the packet is too short or contains corrupt data.
319: */
1.46 deraadt 320: switch (version) {
1.25 markus 321: case 1:
1.30 markus 322: key = key_new(KEY_RSA1);
1.25 markus 323: bits = buffer_get_int(&auth->identities);
324: buffer_get_bignum(&auth->identities, key->rsa->e);
325: buffer_get_bignum(&auth->identities, key->rsa->n);
326: *comment = buffer_get_string(&auth->identities, NULL);
1.66 djm 327: keybits = BN_num_bits(key->rsa->n);
328: if (keybits < 0 || bits != (u_int)keybits)
1.59 itojun 329: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 330: BN_num_bits(key->rsa->n), bits);
331: break;
332: case 2:
333: blob = buffer_get_string(&auth->identities, &blen);
334: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 335: key = key_from_blob(blob, blen);
1.25 markus 336: xfree(blob);
337: break;
338: default:
339: return NULL;
340: }
1.12 markus 341: /* Decrement the number of remaining entries. */
342: auth->howmany--;
1.25 markus 343: return key;
1.1 deraadt 344: }
345:
1.14 markus 346: /*
347: * Generates a random challenge, sends it to the agent, and waits for
348: * response from the agent. Returns true (non-zero) if the agent gave the
349: * correct answer, zero otherwise. Response type selects the style of
350: * response desired, with 0 corresponding to protocol version 1.0 (no longer
351: * supported) and 1 corresponding to protocol version 1.1.
352: */
1.1 deraadt 353:
1.2 provos 354: int
355: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 356: Key* key, BIGNUM *challenge,
1.31 markus 357: u_char session_id[16],
358: u_int response_type,
359: u_char response[16])
1.1 deraadt 360: {
1.12 markus 361: Buffer buffer;
1.24 markus 362: int success = 0;
363: int i;
364: int type;
1.12 markus 365:
1.30 markus 366: if (key->type != KEY_RSA1)
1.25 markus 367: return 0;
368: if (response_type == 0) {
1.59 itojun 369: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 370: return 0;
371: }
1.12 markus 372: buffer_init(&buffer);
1.24 markus 373: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 374: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
375: buffer_put_bignum(&buffer, key->rsa->e);
376: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 377: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 378: buffer_append(&buffer, session_id, 16);
1.12 markus 379: buffer_put_int(&buffer, response_type);
380:
1.24 markus 381: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 382: buffer_free(&buffer);
383: return 0;
384: }
1.24 markus 385: type = buffer_get_char(&buffer);
1.12 markus 386:
1.29 markus 387: if (agent_failed(type)) {
1.59 itojun 388: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 389: } else if (type != SSH_AGENT_RSA_RESPONSE) {
390: fatal("Bad authentication response: %d", type);
391: } else {
392: success = 1;
393: /*
394: * Get the response from the packet. This will abort with a
395: * fatal error if the packet is corrupt.
396: */
397: for (i = 0; i < 16; i++)
398: response[i] = buffer_get_char(&buffer);
1.12 markus 399: }
400: buffer_free(&buffer);
1.24 markus 401: return success;
1.12 markus 402: }
1.1 deraadt 403:
1.25 markus 404: /* ask agent to sign data, returns -1 on error, 0 on success */
405: int
406: ssh_agent_sign(AuthenticationConnection *auth,
407: Key *key,
1.48 markus 408: u_char **sigp, u_int *lenp,
409: u_char *data, u_int datalen)
1.25 markus 410: {
1.28 markus 411: extern int datafellows;
1.25 markus 412: Buffer msg;
1.31 markus 413: u_char *blob;
414: u_int blen;
1.28 markus 415: int type, flags = 0;
1.25 markus 416: int ret = -1;
417:
1.30 markus 418: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 419: return -1;
420:
1.28 markus 421: if (datafellows & SSH_BUG_SIGBLOB)
422: flags = SSH_AGENT_OLD_SIGNATURE;
423:
1.25 markus 424: buffer_init(&msg);
425: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
426: buffer_put_string(&msg, blob, blen);
427: buffer_put_string(&msg, data, datalen);
1.28 markus 428: buffer_put_int(&msg, flags);
1.25 markus 429: xfree(blob);
430:
431: if (ssh_request_reply(auth, &msg, &msg) == 0) {
432: buffer_free(&msg);
433: return -1;
434: }
435: type = buffer_get_char(&msg);
1.29 markus 436: if (agent_failed(type)) {
1.59 itojun 437: logit("Agent admitted failure to sign using the key.");
1.25 markus 438: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
439: fatal("Bad authentication response: %d", type);
440: } else {
441: ret = 0;
442: *sigp = buffer_get_string(&msg, lenp);
443: }
444: buffer_free(&msg);
445: return ret;
446: }
447:
1.22 markus 448: /* Encode key for a message to the agent. */
449:
1.41 itojun 450: static void
1.30 markus 451: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 452: {
453: buffer_put_int(b, BN_num_bits(key->n));
454: buffer_put_bignum(b, key->n);
455: buffer_put_bignum(b, key->e);
456: buffer_put_bignum(b, key->d);
457: /* To keep within the protocol: p < q for ssh. in SSL p > q */
458: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
459: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
460: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 461: buffer_put_cstring(b, comment);
1.22 markus 462: }
463:
1.41 itojun 464: static void
1.30 markus 465: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 466: {
1.30 markus 467: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 468: switch (key->type) {
1.30 markus 469: case KEY_RSA:
470: buffer_put_bignum2(b, key->rsa->n);
471: buffer_put_bignum2(b, key->rsa->e);
472: buffer_put_bignum2(b, key->rsa->d);
473: buffer_put_bignum2(b, key->rsa->iqmp);
474: buffer_put_bignum2(b, key->rsa->p);
475: buffer_put_bignum2(b, key->rsa->q);
476: break;
477: case KEY_DSA:
478: buffer_put_bignum2(b, key->dsa->p);
479: buffer_put_bignum2(b, key->dsa->q);
480: buffer_put_bignum2(b, key->dsa->g);
481: buffer_put_bignum2(b, key->dsa->pub_key);
482: buffer_put_bignum2(b, key->dsa->priv_key);
483: break;
484: }
485: buffer_put_cstring(b, comment);
1.22 markus 486: }
487:
1.14 markus 488: /*
489: * Adds an identity to the authentication server. This call is not meant to
490: * be used by normal applications.
491: */
1.1 deraadt 492:
1.18 markus 493: int
1.54 markus 494: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 495: const char *comment, u_int life, u_int confirm)
1.1 deraadt 496: {
1.25 markus 497: Buffer msg;
1.58 markus 498: int type, constrained = (life || confirm);
1.12 markus 499:
1.25 markus 500: buffer_init(&msg);
1.22 markus 501:
502: switch (key->type) {
1.30 markus 503: case KEY_RSA1:
1.54 markus 504: type = constrained ?
505: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
506: SSH_AGENTC_ADD_RSA_IDENTITY;
507: buffer_put_char(&msg, type);
1.30 markus 508: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
509: break;
1.22 markus 510: case KEY_RSA:
511: case KEY_DSA:
1.54 markus 512: type = constrained ?
513: SSH2_AGENTC_ADD_ID_CONSTRAINED :
514: SSH2_AGENTC_ADD_IDENTITY;
515: buffer_put_char(&msg, type);
1.30 markus 516: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 517: break;
518: default:
1.25 markus 519: buffer_free(&msg);
1.22 markus 520: return 0;
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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