Annotation of src/usr.bin/ssh/authfd.c, Revision 1.73
1.73 ! deraadt 1: /* $OpenBSD: authfd.c,v 1.72 2006/03/25 13:17:01 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:
38: #include "includes.h"
1.67 stevesk 39:
40: #include <sys/types.h>
41: #include <sys/un.h>
1.33 markus 42:
43: #include <openssl/evp.h>
1.1 deraadt 44:
45: #include "ssh.h"
46: #include "rsa.h"
47: #include "buffer.h"
48: #include "bufaux.h"
49: #include "xmalloc.h"
50: #include "getput.h"
1.22 markus 51: #include "key.h"
52: #include "authfd.h"
1.33 markus 53: #include "cipher.h"
1.22 markus 54: #include "kex.h"
1.28 markus 55: #include "compat.h"
1.33 markus 56: #include "log.h"
57: #include "atomicio.h"
1.2 provos 58:
1.57 stevesk 59: static int agent_present = 0;
60:
1.21 markus 61: /* helper */
1.24 markus 62: int decode_reply(int type);
1.21 markus 63:
1.29 markus 64: /* macro to check for "agent failure" message */
65: #define agent_failed(x) \
1.44 markus 66: ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 67: (x == SSH2_AGENT_FAILURE))
1.29 markus 68:
1.57 stevesk 69: int
70: ssh_agent_present(void)
71: {
72: int authfd;
73:
74: if (agent_present)
75: return 1;
76: if ((authfd = ssh_get_authentication_socket()) == -1)
77: return 0;
78: else {
79: ssh_close_authentication_socket(authfd);
80: return 1;
81: }
82: }
83:
1.1 deraadt 84: /* Returns the number of the authentication fd, or -1 if there is none. */
85:
1.2 provos 86: int
1.32 markus 87: ssh_get_authentication_socket(void)
1.1 deraadt 88: {
1.12 markus 89: const char *authsocket;
1.45 stevesk 90: int sock;
1.12 markus 91: struct sockaddr_un sunaddr;
92:
93: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
94: if (!authsocket)
95: return -1;
96:
97: sunaddr.sun_family = AF_UNIX;
98: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
99:
100: sock = socket(AF_UNIX, SOCK_STREAM, 0);
101: if (sock < 0)
102: return -1;
103:
104: /* close on exec */
105: if (fcntl(sock, F_SETFD, 1) == -1) {
106: close(sock);
107: return -1;
108: }
1.71 deraadt 109: if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) {
1.12 markus 110: close(sock);
111: return -1;
112: }
1.57 stevesk 113: agent_present = 1;
1.12 markus 114: return sock;
1.1 deraadt 115: }
116:
1.41 itojun 117: static int
1.25 markus 118: ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
1.24 markus 119: {
1.66 djm 120: u_int l, len;
1.24 markus 121: char buf[1024];
122:
123: /* Get the length of the message, and format it in the buffer. */
124: len = buffer_len(request);
125: PUT_32BIT(buf, len);
126:
127: /* Send the length and then the packet to the agent. */
1.61 deraadt 128: if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
129: atomicio(vwrite, auth->fd, buffer_ptr(request),
1.24 markus 130: buffer_len(request)) != buffer_len(request)) {
131: error("Error writing to authentication socket.");
132: return 0;
133: }
134: /*
135: * Wait for response from the agent. First read the length of the
136: * response packet.
137: */
1.64 avsm 138: if (atomicio(read, auth->fd, buf, 4) != 4) {
139: error("Error reading response length from authentication socket.");
140: return 0;
1.24 markus 141: }
142:
143: /* Extract the length, and check it for sanity. */
144: len = GET_32BIT(buf);
145: if (len > 256 * 1024)
1.62 miod 146: fatal("Authentication response too long: %u", len);
1.24 markus 147:
148: /* Read the rest of the response in to the buffer. */
149: buffer_clear(reply);
150: while (len > 0) {
151: l = len;
152: if (l > sizeof(buf))
153: l = sizeof(buf);
1.65 avsm 154: if (atomicio(read, auth->fd, buf, l) != l) {
1.24 markus 155: error("Error reading response from authentication socket.");
156: return 0;
157: }
1.56 markus 158: buffer_append(reply, buf, l);
1.24 markus 159: len -= l;
160: }
161: return 1;
162: }
163:
1.14 markus 164: /*
165: * Closes the agent socket if it should be closed (depends on how it was
166: * obtained). The argument must have been returned by
167: * ssh_get_authentication_socket().
168: */
1.1 deraadt 169:
1.18 markus 170: void
1.12 markus 171: ssh_close_authentication_socket(int sock)
1.1 deraadt 172: {
1.12 markus 173: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
174: close(sock);
1.1 deraadt 175: }
176:
1.14 markus 177: /*
178: * Opens and connects a private socket for communication with the
179: * authentication agent. Returns the file descriptor (which must be
180: * shut down and closed by the caller when no longer needed).
181: * Returns NULL if an error occurred and the connection could not be
182: * opened.
183: */
1.1 deraadt 184:
1.12 markus 185: AuthenticationConnection *
1.32 markus 186: ssh_get_authentication_connection(void)
1.1 deraadt 187: {
1.12 markus 188: AuthenticationConnection *auth;
189: int sock;
1.1 deraadt 190:
1.12 markus 191: sock = ssh_get_authentication_socket();
192:
1.14 markus 193: /*
194: * Fail if we couldn't obtain a connection. This happens if we
195: * exited due to a timeout.
196: */
1.12 markus 197: if (sock < 0)
198: return NULL;
199:
200: auth = xmalloc(sizeof(*auth));
201: auth->fd = sock;
202: buffer_init(&auth->identities);
203: auth->howmany = 0;
204:
205: return auth;
1.1 deraadt 206: }
207:
1.14 markus 208: /*
209: * Closes the connection to the authentication agent and frees any associated
210: * memory.
211: */
1.1 deraadt 212:
1.18 markus 213: void
1.25 markus 214: ssh_close_authentication_connection(AuthenticationConnection *auth)
1.1 deraadt 215: {
1.25 markus 216: buffer_free(&auth->identities);
217: close(auth->fd);
218: xfree(auth);
1.50 markus 219: }
220:
221: /* Lock/unlock agent */
222: int
223: ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
224: {
225: int type;
226: Buffer msg;
227:
228: buffer_init(&msg);
229: buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK);
230: buffer_put_cstring(&msg, password);
231:
232: if (ssh_request_reply(auth, &msg, &msg) == 0) {
233: buffer_free(&msg);
234: return 0;
235: }
236: type = buffer_get_char(&msg);
237: buffer_free(&msg);
238: return decode_reply(type);
1.1 deraadt 239: }
240:
1.14 markus 241: /*
242: * Returns the first authentication identity held by the agent.
243: */
1.1 deraadt 244:
1.30 markus 245: int
246: ssh_get_num_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 247: {
1.25 markus 248: int type, code1 = 0, code2 = 0;
1.24 markus 249: Buffer request;
1.25 markus 250:
1.46 deraadt 251: switch (version) {
1.25 markus 252: case 1:
253: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
254: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
255: break;
256: case 2:
257: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
258: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
259: break;
260: default:
1.30 markus 261: return 0;
1.25 markus 262: }
1.1 deraadt 263:
1.14 markus 264: /*
265: * Send a message to the agent requesting for a list of the
266: * identities it can represent.
267: */
1.24 markus 268: buffer_init(&request);
1.25 markus 269: buffer_put_char(&request, code1);
1.12 markus 270:
271: buffer_clear(&auth->identities);
1.24 markus 272: if (ssh_request_reply(auth, &request, &auth->identities) == 0) {
273: buffer_free(&request);
1.30 markus 274: return 0;
1.12 markus 275: }
1.24 markus 276: buffer_free(&request);
1.1 deraadt 277:
1.12 markus 278: /* Get message type, and verify that we got a proper answer. */
1.24 markus 279: type = buffer_get_char(&auth->identities);
1.29 markus 280: if (agent_failed(type)) {
1.30 markus 281: return 0;
1.25 markus 282: } else if (type != code2) {
1.24 markus 283: fatal("Bad authentication reply message type: %d", type);
1.25 markus 284: }
1.12 markus 285:
286: /* Get the number of entries in the response and check it for sanity. */
287: auth->howmany = buffer_get_int(&auth->identities);
1.62 miod 288: if ((u_int)auth->howmany > 1024)
1.37 millert 289: fatal("Too many identities in authentication reply: %d",
1.24 markus 290: auth->howmany);
1.12 markus 291:
1.30 markus 292: return auth->howmany;
293: }
294:
295: Key *
296: ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version)
297: {
298: /* get number of identities and return the first entry (if any). */
299: if (ssh_get_num_identities(auth, version) > 0)
300: return ssh_get_next_identity(auth, comment, version);
301: return NULL;
1.1 deraadt 302: }
303:
1.25 markus 304: Key *
305: ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version)
1.1 deraadt 306: {
1.66 djm 307: int keybits;
1.31 markus 308: u_int bits;
309: u_char *blob;
310: u_int blen;
1.25 markus 311: Key *key = NULL;
1.9 markus 312:
1.12 markus 313: /* Return failure if no more entries. */
314: if (auth->howmany <= 0)
1.25 markus 315: return NULL;
1.12 markus 316:
1.14 markus 317: /*
318: * Get the next entry from the packet. These will abort with a fatal
319: * error if the packet is too short or contains corrupt data.
320: */
1.46 deraadt 321: switch (version) {
1.25 markus 322: case 1:
1.30 markus 323: key = key_new(KEY_RSA1);
1.25 markus 324: bits = buffer_get_int(&auth->identities);
325: buffer_get_bignum(&auth->identities, key->rsa->e);
326: buffer_get_bignum(&auth->identities, key->rsa->n);
327: *comment = buffer_get_string(&auth->identities, NULL);
1.66 djm 328: keybits = BN_num_bits(key->rsa->n);
329: if (keybits < 0 || bits != (u_int)keybits)
1.59 itojun 330: logit("Warning: identity keysize mismatch: actual %d, announced %u",
1.25 markus 331: BN_num_bits(key->rsa->n), bits);
332: break;
333: case 2:
334: blob = buffer_get_string(&auth->identities, &blen);
335: *comment = buffer_get_string(&auth->identities, NULL);
1.30 markus 336: key = key_from_blob(blob, blen);
1.25 markus 337: xfree(blob);
338: break;
339: default:
340: return NULL;
341: }
1.12 markus 342: /* Decrement the number of remaining entries. */
343: auth->howmany--;
1.25 markus 344: return key;
1.1 deraadt 345: }
346:
1.14 markus 347: /*
348: * Generates a random challenge, sends it to the agent, and waits for
349: * response from the agent. Returns true (non-zero) if the agent gave the
350: * correct answer, zero otherwise. Response type selects the style of
351: * response desired, with 0 corresponding to protocol version 1.0 (no longer
352: * supported) and 1 corresponding to protocol version 1.1.
353: */
1.1 deraadt 354:
1.2 provos 355: int
356: ssh_decrypt_challenge(AuthenticationConnection *auth,
1.25 markus 357: Key* key, BIGNUM *challenge,
1.31 markus 358: u_char session_id[16],
359: u_int response_type,
360: u_char response[16])
1.1 deraadt 361: {
1.12 markus 362: Buffer buffer;
1.24 markus 363: int success = 0;
364: int i;
365: int type;
1.12 markus 366:
1.30 markus 367: if (key->type != KEY_RSA1)
1.25 markus 368: return 0;
369: if (response_type == 0) {
1.59 itojun 370: logit("Compatibility with ssh protocol version 1.0 no longer supported.");
1.25 markus 371: return 0;
372: }
1.12 markus 373: buffer_init(&buffer);
1.24 markus 374: buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE);
1.25 markus 375: buffer_put_int(&buffer, BN_num_bits(key->rsa->n));
376: buffer_put_bignum(&buffer, key->rsa->e);
377: buffer_put_bignum(&buffer, key->rsa->n);
1.12 markus 378: buffer_put_bignum(&buffer, challenge);
1.47 stevesk 379: buffer_append(&buffer, session_id, 16);
1.12 markus 380: buffer_put_int(&buffer, response_type);
381:
1.24 markus 382: if (ssh_request_reply(auth, &buffer, &buffer) == 0) {
1.12 markus 383: buffer_free(&buffer);
384: return 0;
385: }
1.24 markus 386: type = buffer_get_char(&buffer);
1.12 markus 387:
1.29 markus 388: if (agent_failed(type)) {
1.59 itojun 389: logit("Agent admitted failure to authenticate using the key.");
1.24 markus 390: } else if (type != SSH_AGENT_RSA_RESPONSE) {
391: fatal("Bad authentication response: %d", type);
392: } else {
393: success = 1;
394: /*
395: * Get the response from the packet. This will abort with a
396: * fatal error if the packet is corrupt.
397: */
398: for (i = 0; i < 16; i++)
1.73 ! deraadt 399: response[i] = (u_char)buffer_get_char(&buffer);
1.12 markus 400: }
401: buffer_free(&buffer);
1.24 markus 402: return success;
1.12 markus 403: }
1.1 deraadt 404:
1.25 markus 405: /* ask agent to sign data, returns -1 on error, 0 on success */
406: int
407: ssh_agent_sign(AuthenticationConnection *auth,
408: Key *key,
1.48 markus 409: u_char **sigp, u_int *lenp,
410: u_char *data, u_int datalen)
1.25 markus 411: {
1.28 markus 412: extern int datafellows;
1.25 markus 413: Buffer msg;
1.31 markus 414: u_char *blob;
415: u_int blen;
1.28 markus 416: int type, flags = 0;
1.25 markus 417: int ret = -1;
418:
1.30 markus 419: if (key_to_blob(key, &blob, &blen) == 0)
1.25 markus 420: return -1;
421:
1.28 markus 422: if (datafellows & SSH_BUG_SIGBLOB)
423: flags = SSH_AGENT_OLD_SIGNATURE;
424:
1.25 markus 425: buffer_init(&msg);
426: buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);
427: buffer_put_string(&msg, blob, blen);
428: buffer_put_string(&msg, data, datalen);
1.28 markus 429: buffer_put_int(&msg, flags);
1.25 markus 430: xfree(blob);
431:
432: if (ssh_request_reply(auth, &msg, &msg) == 0) {
433: buffer_free(&msg);
434: return -1;
435: }
436: type = buffer_get_char(&msg);
1.29 markus 437: if (agent_failed(type)) {
1.59 itojun 438: logit("Agent admitted failure to sign using the key.");
1.25 markus 439: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
440: fatal("Bad authentication response: %d", type);
441: } else {
442: ret = 0;
443: *sigp = buffer_get_string(&msg, lenp);
444: }
445: buffer_free(&msg);
446: return ret;
447: }
448:
1.22 markus 449: /* Encode key for a message to the agent. */
450:
1.41 itojun 451: static void
1.30 markus 452: ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
1.22 markus 453: {
454: buffer_put_int(b, BN_num_bits(key->n));
455: buffer_put_bignum(b, key->n);
456: buffer_put_bignum(b, key->e);
457: buffer_put_bignum(b, key->d);
458: /* To keep within the protocol: p < q for ssh. in SSL p > q */
459: buffer_put_bignum(b, key->iqmp); /* ssh key->u */
460: buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */
461: buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */
1.40 markus 462: buffer_put_cstring(b, comment);
1.22 markus 463: }
464:
1.41 itojun 465: static void
1.30 markus 466: ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
1.22 markus 467: {
1.30 markus 468: buffer_put_cstring(b, key_ssh_name(key));
1.46 deraadt 469: switch (key->type) {
1.30 markus 470: case KEY_RSA:
471: buffer_put_bignum2(b, key->rsa->n);
472: buffer_put_bignum2(b, key->rsa->e);
473: buffer_put_bignum2(b, key->rsa->d);
474: buffer_put_bignum2(b, key->rsa->iqmp);
475: buffer_put_bignum2(b, key->rsa->p);
476: buffer_put_bignum2(b, key->rsa->q);
477: break;
478: case KEY_DSA:
479: buffer_put_bignum2(b, key->dsa->p);
480: buffer_put_bignum2(b, key->dsa->q);
481: buffer_put_bignum2(b, key->dsa->g);
482: buffer_put_bignum2(b, key->dsa->pub_key);
483: buffer_put_bignum2(b, key->dsa->priv_key);
484: break;
485: }
486: buffer_put_cstring(b, comment);
1.22 markus 487: }
488:
1.14 markus 489: /*
490: * Adds an identity to the authentication server. This call is not meant to
491: * be used by normal applications.
492: */
1.1 deraadt 493:
1.18 markus 494: int
1.54 markus 495: ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
1.58 markus 496: const char *comment, u_int life, u_int confirm)
1.1 deraadt 497: {
1.25 markus 498: Buffer msg;
1.58 markus 499: int type, constrained = (life || confirm);
1.12 markus 500:
1.25 markus 501: buffer_init(&msg);
1.22 markus 502:
503: switch (key->type) {
1.30 markus 504: case KEY_RSA1:
1.54 markus 505: type = constrained ?
506: SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
507: SSH_AGENTC_ADD_RSA_IDENTITY;
508: buffer_put_char(&msg, type);
1.30 markus 509: ssh_encode_identity_rsa1(&msg, key->rsa, comment);
510: break;
1.22 markus 511: case KEY_RSA:
512: case KEY_DSA:
1.54 markus 513: type = constrained ?
514: SSH2_AGENTC_ADD_ID_CONSTRAINED :
515: SSH2_AGENTC_ADD_IDENTITY;
516: buffer_put_char(&msg, type);
1.30 markus 517: ssh_encode_identity_ssh2(&msg, key, comment);
1.22 markus 518: break;
519: default:
1.25 markus 520: buffer_free(&msg);
1.22 markus 521: return 0;
522: }
1.54 markus 523: if (constrained) {
524: if (life != 0) {
525: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
526: buffer_put_int(&msg, life);
527: }
1.58 markus 528: if (confirm != 0)
529: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
1.54 markus 530: }
1.25 markus 531: if (ssh_request_reply(auth, &msg, &msg) == 0) {
532: buffer_free(&msg);
1.12 markus 533: return 0;
534: }
1.25 markus 535: type = buffer_get_char(&msg);
536: buffer_free(&msg);
1.24 markus 537: return decode_reply(type);
1.12 markus 538: }
1.1 deraadt 539:
1.54 markus 540: int
541: ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
542: {
1.58 markus 543: return ssh_add_identity_constrained(auth, key, comment, 0, 0);
1.54 markus 544: }
545:
1.14 markus 546: /*
547: * Removes an identity from the authentication server. This call is not
548: * meant to be used by normal applications.
549: */
1.1 deraadt 550:
1.18 markus 551: int
1.25 markus 552: ssh_remove_identity(AuthenticationConnection *auth, Key *key)
1.1 deraadt 553: {
1.25 markus 554: Buffer msg;
1.24 markus 555: int type;
1.31 markus 556: u_char *blob;
557: u_int blen;
1.12 markus 558:
1.25 markus 559: buffer_init(&msg);
1.12 markus 560:
1.30 markus 561: if (key->type == KEY_RSA1) {
1.25 markus 562: buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY);
563: buffer_put_int(&msg, BN_num_bits(key->rsa->n));
564: buffer_put_bignum(&msg, key->rsa->e);
565: buffer_put_bignum(&msg, key->rsa->n);
1.30 markus 566: } else if (key->type == KEY_DSA || key->type == KEY_RSA) {
567: key_to_blob(key, &blob, &blen);
1.25 markus 568: buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY);
1.51 markus 569: buffer_put_string(&msg, blob, blen);
570: xfree(blob);
571: } else {
572: buffer_free(&msg);
573: return 0;
574: }
1.42 markus 575: if (ssh_request_reply(auth, &msg, &msg) == 0) {
576: buffer_free(&msg);
577: return 0;
578: }
579: type = buffer_get_char(&msg);
580: buffer_free(&msg);
581: return decode_reply(type);
582: }
583:
584: int
1.63 djm 585: ssh_update_card(AuthenticationConnection *auth, int add,
1.60 djm 586: const char *reader_id, const char *pin, u_int life, u_int confirm)
1.42 markus 587: {
588: Buffer msg;
1.60 djm 589: int type, constrained = (life || confirm);
590:
591: if (add) {
592: type = constrained ?
593: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
594: SSH_AGENTC_ADD_SMARTCARD_KEY;
595: } else
596: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 597:
598: buffer_init(&msg);
1.60 djm 599: buffer_put_char(&msg, type);
1.43 markus 600: buffer_put_cstring(&msg, reader_id);
1.49 rees 601: buffer_put_cstring(&msg, pin);
1.63 djm 602:
1.60 djm 603: if (constrained) {
604: if (life != 0) {
605: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
606: buffer_put_int(&msg, life);
607: }
608: if (confirm != 0)
609: buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
610: }
611:
1.25 markus 612: if (ssh_request_reply(auth, &msg, &msg) == 0) {
613: buffer_free(&msg);
1.12 markus 614: return 0;
615: }
1.25 markus 616: type = buffer_get_char(&msg);
617: buffer_free(&msg);
1.24 markus 618: return decode_reply(type);
1.12 markus 619: }
620:
1.14 markus 621: /*
622: * Removes all identities from the agent. This call is not meant to be used
623: * by normal applications.
624: */
1.1 deraadt 625:
1.18 markus 626: int
1.25 markus 627: ssh_remove_all_identities(AuthenticationConnection *auth, int version)
1.1 deraadt 628: {
1.25 markus 629: Buffer msg;
1.24 markus 630: int type;
1.25 markus 631: int code = (version==1) ?
632: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
633: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
1.12 markus 634:
1.25 markus 635: buffer_init(&msg);
636: buffer_put_char(&msg, code);
1.12 markus 637:
1.25 markus 638: if (ssh_request_reply(auth, &msg, &msg) == 0) {
639: buffer_free(&msg);
1.12 markus 640: return 0;
641: }
1.25 markus 642: type = buffer_get_char(&msg);
643: buffer_free(&msg);
1.24 markus 644: return decode_reply(type);
1.21 markus 645: }
646:
1.35 stevesk 647: int
1.24 markus 648: decode_reply(int type)
1.21 markus 649: {
1.12 markus 650: switch (type) {
651: case SSH_AGENT_FAILURE:
1.29 markus 652: case SSH_COM_AGENT2_FAILURE:
1.44 markus 653: case SSH2_AGENT_FAILURE:
1.59 itojun 654: logit("SSH_AGENT_FAILURE");
1.12 markus 655: return 0;
656: case SSH_AGENT_SUCCESS:
657: return 1;
658: default:
1.21 markus 659: fatal("Bad response from authentication agent: %d", type);
1.12 markus 660: }
661: /* NOTREACHED */
662: return 0;
663: }
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