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3c0ef626 | 1 | /* |
2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5 | * Functions for connecting the local authentication agent. | |
6 | * | |
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". | |
12 | * | |
13 | * SSH2 implementation, | |
14 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | |
15 | * | |
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. | |
35 | */ | |
36 | ||
37 | #include "includes.h" | |
665a873d | 38 | RCSID("$OpenBSD: authfd.c,v 1.66 2005/06/17 02:44:32 djm Exp $"); |
3c0ef626 | 39 | |
40 | #include <openssl/evp.h> | |
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" | |
48 | #include "key.h" | |
49 | #include "authfd.h" | |
50 | #include "cipher.h" | |
51 | #include "kex.h" | |
52 | #include "compat.h" | |
53 | #include "log.h" | |
54 | #include "atomicio.h" | |
55 | ||
41b2f314 | 56 | static int agent_present = 0; |
57 | ||
3c0ef626 | 58 | /* helper */ |
59 | int decode_reply(int type); | |
60 | ||
61 | /* macro to check for "agent failure" message */ | |
62 | #define agent_failed(x) \ | |
63 | ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \ | |
f5799ae1 | 64 | (x == SSH2_AGENT_FAILURE)) |
3c0ef626 | 65 | |
41b2f314 | 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 | ||
3c0ef626 | 81 | /* Returns the number of the authentication fd, or -1 if there is none. */ |
82 | ||
83 | int | |
84 | ssh_get_authentication_socket(void) | |
85 | { | |
86 | const char *authsocket; | |
87 | int sock; | |
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 | } | |
106 | if (connect(sock, (struct sockaddr *) &sunaddr, sizeof sunaddr) < 0) { | |
107 | close(sock); | |
108 | return -1; | |
109 | } | |
41b2f314 | 110 | agent_present = 1; |
3c0ef626 | 111 | return sock; |
112 | } | |
113 | ||
114 | static int | |
115 | ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply) | |
116 | { | |
665a873d | 117 | u_int l, len; |
3c0ef626 | 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. */ | |
0fff78ff | 125 | if (atomicio(vwrite, auth->fd, buf, 4) != 4 || |
126 | atomicio(vwrite, auth->fd, buffer_ptr(request), | |
3c0ef626 | 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 | */ | |
c9f39d2c | 135 | if (atomicio(read, auth->fd, buf, 4) != 4) { |
136 | error("Error reading response length from authentication socket."); | |
137 | return 0; | |
3c0ef626 | 138 | } |
139 | ||
140 | /* Extract the length, and check it for sanity. */ | |
141 | len = GET_32BIT(buf); | |
142 | if (len > 256 * 1024) | |
cdd66111 | 143 | fatal("Authentication response too long: %u", len); |
3c0ef626 | 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); | |
665a873d | 151 | if (atomicio(read, auth->fd, buf, l) != l) { |
3c0ef626 | 152 | error("Error reading response from authentication socket."); |
153 | return 0; | |
154 | } | |
680cee3b | 155 | buffer_append(reply, buf, l); |
3c0ef626 | 156 | len -= l; |
157 | } | |
158 | return 1; | |
159 | } | |
160 | ||
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 | */ | |
166 | ||
167 | void | |
168 | ssh_close_authentication_socket(int sock) | |
169 | { | |
170 | if (getenv(SSH_AUTHSOCKET_ENV_NAME)) | |
171 | close(sock); | |
172 | } | |
173 | ||
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 | */ | |
181 | ||
182 | AuthenticationConnection * | |
183 | ssh_get_authentication_connection(void) | |
184 | { | |
185 | AuthenticationConnection *auth; | |
186 | int sock; | |
187 | ||
188 | sock = ssh_get_authentication_socket(); | |
189 | ||
190 | /* | |
191 | * Fail if we couldn't obtain a connection. This happens if we | |
192 | * exited due to a timeout. | |
193 | */ | |
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; | |
203 | } | |
204 | ||
205 | /* | |
206 | * Closes the connection to the authentication agent and frees any associated | |
207 | * memory. | |
208 | */ | |
209 | ||
210 | void | |
211 | ssh_close_authentication_connection(AuthenticationConnection *auth) | |
212 | { | |
213 | buffer_free(&auth->identities); | |
214 | close(auth->fd); | |
215 | xfree(auth); | |
216 | } | |
217 | ||
f5799ae1 | 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); | |
236 | } | |
237 | ||
3c0ef626 | 238 | /* |
239 | * Returns the first authentication identity held by the agent. | |
240 | */ | |
241 | ||
242 | int | |
243 | ssh_get_num_identities(AuthenticationConnection *auth, int version) | |
244 | { | |
245 | int type, code1 = 0, code2 = 0; | |
246 | Buffer request; | |
247 | ||
e9a17296 | 248 | switch (version) { |
3c0ef626 | 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: | |
258 | return 0; | |
259 | } | |
260 | ||
261 | /* | |
262 | * Send a message to the agent requesting for a list of the | |
263 | * identities it can represent. | |
264 | */ | |
265 | buffer_init(&request); | |
266 | buffer_put_char(&request, code1); | |
267 | ||
268 | buffer_clear(&auth->identities); | |
269 | if (ssh_request_reply(auth, &request, &auth->identities) == 0) { | |
270 | buffer_free(&request); | |
271 | return 0; | |
272 | } | |
273 | buffer_free(&request); | |
274 | ||
275 | /* Get message type, and verify that we got a proper answer. */ | |
276 | type = buffer_get_char(&auth->identities); | |
277 | if (agent_failed(type)) { | |
278 | return 0; | |
279 | } else if (type != code2) { | |
280 | fatal("Bad authentication reply message type: %d", type); | |
281 | } | |
282 | ||
283 | /* Get the number of entries in the response and check it for sanity. */ | |
284 | auth->howmany = buffer_get_int(&auth->identities); | |
cdd66111 | 285 | if ((u_int)auth->howmany > 1024) |
3c0ef626 | 286 | fatal("Too many identities in authentication reply: %d", |
287 | auth->howmany); | |
288 | ||
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; | |
299 | } | |
300 | ||
301 | Key * | |
302 | ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version) | |
303 | { | |
665a873d | 304 | int keybits; |
3c0ef626 | 305 | u_int bits; |
306 | u_char *blob; | |
307 | u_int blen; | |
308 | Key *key = NULL; | |
309 | ||
310 | /* Return failure if no more entries. */ | |
311 | if (auth->howmany <= 0) | |
312 | return NULL; | |
313 | ||
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 | */ | |
e9a17296 | 318 | switch (version) { |
3c0ef626 | 319 | case 1: |
320 | key = key_new(KEY_RSA1); | |
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); | |
665a873d | 325 | keybits = BN_num_bits(key->rsa->n); |
326 | if (keybits < 0 || bits != (u_int)keybits) | |
0fff78ff | 327 | logit("Warning: identity keysize mismatch: actual %d, announced %u", |
3c0ef626 | 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); | |
333 | key = key_from_blob(blob, blen); | |
334 | xfree(blob); | |
335 | break; | |
336 | default: | |
337 | return NULL; | |
338 | break; | |
339 | } | |
340 | /* Decrement the number of remaining entries. */ | |
341 | auth->howmany--; | |
342 | return key; | |
343 | } | |
344 | ||
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 | */ | |
352 | ||
353 | int | |
354 | ssh_decrypt_challenge(AuthenticationConnection *auth, | |
355 | Key* key, BIGNUM *challenge, | |
356 | u_char session_id[16], | |
357 | u_int response_type, | |
358 | u_char response[16]) | |
359 | { | |
360 | Buffer buffer; | |
361 | int success = 0; | |
362 | int i; | |
363 | int type; | |
364 | ||
365 | if (key->type != KEY_RSA1) | |
366 | return 0; | |
367 | if (response_type == 0) { | |
0fff78ff | 368 | logit("Compatibility with ssh protocol version 1.0 no longer supported."); |
3c0ef626 | 369 | return 0; |
370 | } | |
371 | buffer_init(&buffer); | |
372 | buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE); | |
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); | |
376 | buffer_put_bignum(&buffer, challenge); | |
e9a17296 | 377 | buffer_append(&buffer, session_id, 16); |
3c0ef626 | 378 | buffer_put_int(&buffer, response_type); |
379 | ||
380 | if (ssh_request_reply(auth, &buffer, &buffer) == 0) { | |
381 | buffer_free(&buffer); | |
382 | return 0; | |
383 | } | |
384 | type = buffer_get_char(&buffer); | |
385 | ||
386 | if (agent_failed(type)) { | |
0fff78ff | 387 | logit("Agent admitted failure to authenticate using the key."); |
3c0ef626 | 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); | |
398 | } | |
399 | buffer_free(&buffer); | |
400 | return success; | |
401 | } | |
402 | ||
403 | /* ask agent to sign data, returns -1 on error, 0 on success */ | |
404 | int | |
405 | ssh_agent_sign(AuthenticationConnection *auth, | |
406 | Key *key, | |
e9a17296 | 407 | u_char **sigp, u_int *lenp, |
408 | u_char *data, u_int datalen) | |
3c0ef626 | 409 | { |
410 | extern int datafellows; | |
411 | Buffer msg; | |
412 | u_char *blob; | |
413 | u_int blen; | |
414 | int type, flags = 0; | |
415 | int ret = -1; | |
416 | ||
417 | if (key_to_blob(key, &blob, &blen) == 0) | |
418 | return -1; | |
419 | ||
420 | if (datafellows & SSH_BUG_SIGBLOB) | |
421 | flags = SSH_AGENT_OLD_SIGNATURE; | |
422 | ||
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); | |
427 | buffer_put_int(&msg, flags); | |
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); | |
435 | if (agent_failed(type)) { | |
0fff78ff | 436 | logit("Agent admitted failure to sign using the key."); |
3c0ef626 | 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 | ||
447 | /* Encode key for a message to the agent. */ | |
448 | ||
449 | static void | |
450 | ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment) | |
451 | { | |
3c0ef626 | 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 */ | |
460 | buffer_put_cstring(b, comment); | |
461 | } | |
462 | ||
463 | static void | |
464 | ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment) | |
465 | { | |
3c0ef626 | 466 | buffer_put_cstring(b, key_ssh_name(key)); |
e9a17296 | 467 | switch (key->type) { |
3c0ef626 | 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); | |
485 | } | |
486 | ||
487 | /* | |
488 | * Adds an identity to the authentication server. This call is not meant to | |
489 | * be used by normal applications. | |
490 | */ | |
491 | ||
492 | int | |
f5799ae1 | 493 | ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key, |
6a9b3198 | 494 | const char *comment, u_int life, u_int confirm) |
3c0ef626 | 495 | { |
496 | Buffer msg; | |
6a9b3198 | 497 | int type, constrained = (life || confirm); |
3c0ef626 | 498 | |
499 | buffer_init(&msg); | |
500 | ||
501 | switch (key->type) { | |
502 | case KEY_RSA1: | |
f5799ae1 | 503 | type = constrained ? |
504 | SSH_AGENTC_ADD_RSA_ID_CONSTRAINED : | |
505 | SSH_AGENTC_ADD_RSA_IDENTITY; | |
506 | buffer_put_char(&msg, type); | |
3c0ef626 | 507 | ssh_encode_identity_rsa1(&msg, key->rsa, comment); |
508 | break; | |
509 | case KEY_RSA: | |
510 | case KEY_DSA: | |
f5799ae1 | 511 | type = constrained ? |
512 | SSH2_AGENTC_ADD_ID_CONSTRAINED : | |
513 | SSH2_AGENTC_ADD_IDENTITY; | |
514 | buffer_put_char(&msg, type); | |
3c0ef626 | 515 | ssh_encode_identity_ssh2(&msg, key, comment); |
516 | break; | |
517 | default: | |
518 | buffer_free(&msg); | |
519 | return 0; | |
520 | break; | |
521 | } | |
f5799ae1 | 522 | if (constrained) { |
523 | if (life != 0) { | |
524 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); | |
525 | buffer_put_int(&msg, life); | |
526 | } | |
6a9b3198 | 527 | if (confirm != 0) |
528 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM); | |
f5799ae1 | 529 | } |
3c0ef626 | 530 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
531 | buffer_free(&msg); | |
532 | return 0; | |
533 | } | |
534 | type = buffer_get_char(&msg); | |
535 | buffer_free(&msg); | |
536 | return decode_reply(type); | |
537 | } | |
538 | ||
f5799ae1 | 539 | int |
540 | ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment) | |
541 | { | |
6a9b3198 | 542 | return ssh_add_identity_constrained(auth, key, comment, 0, 0); |
f5799ae1 | 543 | } |
544 | ||
3c0ef626 | 545 | /* |
546 | * Removes an identity from the authentication server. This call is not | |
547 | * meant to be used by normal applications. | |
548 | */ | |
549 | ||
550 | int | |
551 | ssh_remove_identity(AuthenticationConnection *auth, Key *key) | |
552 | { | |
553 | Buffer msg; | |
554 | int type; | |
555 | u_char *blob; | |
556 | u_int blen; | |
557 | ||
558 | buffer_init(&msg); | |
559 | ||
560 | if (key->type == KEY_RSA1) { | |
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); | |
565 | } else if (key->type == KEY_DSA || key->type == KEY_RSA) { | |
566 | key_to_blob(key, &blob, &blen); | |
567 | buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY); | |
568 | buffer_put_string(&msg, blob, blen); | |
569 | xfree(blob); | |
570 | } else { | |
571 | buffer_free(&msg); | |
572 | return 0; | |
573 | } | |
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 | |
cdd66111 | 584 | ssh_update_card(AuthenticationConnection *auth, int add, |
0fff78ff | 585 | const char *reader_id, const char *pin, u_int life, u_int confirm) |
3c0ef626 | 586 | { |
587 | Buffer msg; | |
0fff78ff | 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; | |
3c0ef626 | 596 | |
597 | buffer_init(&msg); | |
0fff78ff | 598 | buffer_put_char(&msg, type); |
3c0ef626 | 599 | buffer_put_cstring(&msg, reader_id); |
700318f3 | 600 | buffer_put_cstring(&msg, pin); |
cdd66111 | 601 | |
0fff78ff | 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 | ||
3c0ef626 | 611 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
612 | buffer_free(&msg); | |
613 | return 0; | |
614 | } | |
615 | type = buffer_get_char(&msg); | |
616 | buffer_free(&msg); | |
617 | return decode_reply(type); | |
618 | } | |
619 | ||
620 | /* | |
621 | * Removes all identities from the agent. This call is not meant to be used | |
622 | * by normal applications. | |
623 | */ | |
624 | ||
625 | int | |
626 | ssh_remove_all_identities(AuthenticationConnection *auth, int version) | |
627 | { | |
628 | Buffer msg; | |
629 | int type; | |
630 | int code = (version==1) ? | |
631 | SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : | |
632 | SSH2_AGENTC_REMOVE_ALL_IDENTITIES; | |
633 | ||
634 | buffer_init(&msg); | |
635 | buffer_put_char(&msg, code); | |
636 | ||
637 | if (ssh_request_reply(auth, &msg, &msg) == 0) { | |
638 | buffer_free(&msg); | |
639 | return 0; | |
640 | } | |
641 | type = buffer_get_char(&msg); | |
642 | buffer_free(&msg); | |
643 | return decode_reply(type); | |
644 | } | |
645 | ||
646 | int | |
647 | decode_reply(int type) | |
648 | { | |
649 | switch (type) { | |
650 | case SSH_AGENT_FAILURE: | |
651 | case SSH_COM_AGENT2_FAILURE: | |
652 | case SSH2_AGENT_FAILURE: | |
0fff78ff | 653 | logit("SSH_AGENT_FAILURE"); |
3c0ef626 | 654 | return 0; |
655 | case SSH_AGENT_SUCCESS: | |
656 | return 1; | |
657 | default: | |
658 | fatal("Bad response from authentication agent: %d", type); | |
659 | } | |
660 | /* NOTREACHED */ | |
661 | return 0; | |
662 | } |