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b4741f94 | 1 | /* $OpenBSD: authfd.c,v 1.81 2009/08/27 17:44:52 djm Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
5 | * All rights reserved | |
5260325f | 6 | * Functions for connecting the local authentication agent. |
6ae2364d | 7 | * |
bcbf86ec | 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". | |
13 | * | |
2e73a022 | 14 | * SSH2 implementation, |
bcbf86ec | 15 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
16 | * | |
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. | |
2e73a022 | 25 | * |
bcbf86ec | 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. | |
5260325f | 36 | */ |
8efc0c15 | 37 | |
38 | #include "includes.h" | |
cebb4c24 | 39 | |
40 | #include <sys/types.h> | |
41 | #include <sys/un.h> | |
5b04a8bf | 42 | #include <sys/socket.h> |
42f11eb2 | 43 | |
44 | #include <openssl/evp.h> | |
8efc0c15 | 45 | |
31652869 | 46 | #include <openssl/crypto.h> |
d3221cca | 47 | #include <fcntl.h> |
ffa517a8 | 48 | #include <stdlib.h> |
31652869 | 49 | #include <signal.h> |
24436b92 | 50 | #include <stdarg.h> |
00146caa | 51 | #include <string.h> |
5188ba17 | 52 | #include <unistd.h> |
d3221cca | 53 | |
31652869 | 54 | #include "xmalloc.h" |
8efc0c15 | 55 | #include "ssh.h" |
56 | #include "rsa.h" | |
8efc0c15 | 57 | #include "buffer.h" |
4c8722d9 | 58 | #include "key.h" |
59 | #include "authfd.h" | |
42f11eb2 | 60 | #include "cipher.h" |
4c8722d9 | 61 | #include "kex.h" |
188adeb2 | 62 | #include "compat.h" |
42f11eb2 | 63 | #include "log.h" |
64 | #include "atomicio.h" | |
51e7a012 | 65 | #include "misc.h" |
8efc0c15 | 66 | |
8b10e20e | 67 | static int agent_present = 0; |
68 | ||
089fbbd2 | 69 | /* helper */ |
c345cf9d | 70 | int decode_reply(int type); |
089fbbd2 | 71 | |
94ec8c6b | 72 | /* macro to check for "agent failure" message */ |
73 | #define agent_failed(x) \ | |
65e683bd | 74 | ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \ |
7203d6bb | 75 | (x == SSH2_AGENT_FAILURE)) |
94ec8c6b | 76 | |
8b10e20e | 77 | int |
78 | ssh_agent_present(void) | |
79 | { | |
80 | int authfd; | |
81 | ||
82 | if (agent_present) | |
83 | return 1; | |
84 | if ((authfd = ssh_get_authentication_socket()) == -1) | |
85 | return 0; | |
86 | else { | |
87 | ssh_close_authentication_socket(authfd); | |
88 | return 1; | |
89 | } | |
90 | } | |
91 | ||
8efc0c15 | 92 | /* Returns the number of the authentication fd, or -1 if there is none. */ |
93 | ||
94 | int | |
1e3b8b07 | 95 | ssh_get_authentication_socket(void) |
8efc0c15 | 96 | { |
5260325f | 97 | const char *authsocket; |
f34f05d5 | 98 | int sock; |
5260325f | 99 | struct sockaddr_un sunaddr; |
100 | ||
101 | authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME); | |
102 | if (!authsocket) | |
103 | return -1; | |
104 | ||
105 | sunaddr.sun_family = AF_UNIX; | |
106 | strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path)); | |
107 | ||
108 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
109 | if (sock < 0) | |
110 | return -1; | |
111 | ||
112 | /* close on exec */ | |
113 | if (fcntl(sock, F_SETFD, 1) == -1) { | |
114 | close(sock); | |
115 | return -1; | |
116 | } | |
c8e9c167 | 117 | if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) { |
5260325f | 118 | close(sock); |
119 | return -1; | |
120 | } | |
8b10e20e | 121 | agent_present = 1; |
5260325f | 122 | return sock; |
8efc0c15 | 123 | } |
124 | ||
396c147e | 125 | static int |
2e73a022 | 126 | ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply) |
c345cf9d | 127 | { |
2ceb8101 | 128 | u_int l, len; |
c345cf9d | 129 | char buf[1024]; |
130 | ||
131 | /* Get the length of the message, and format it in the buffer. */ | |
132 | len = buffer_len(request); | |
51e7a012 | 133 | put_u32(buf, len); |
c345cf9d | 134 | |
135 | /* Send the length and then the packet to the agent. */ | |
dc54438a | 136 | if (atomicio(vwrite, auth->fd, buf, 4) != 4 || |
137 | atomicio(vwrite, auth->fd, buffer_ptr(request), | |
c345cf9d | 138 | buffer_len(request)) != buffer_len(request)) { |
139 | error("Error writing to authentication socket."); | |
140 | return 0; | |
141 | } | |
142 | /* | |
143 | * Wait for response from the agent. First read the length of the | |
144 | * response packet. | |
145 | */ | |
f581b6e8 | 146 | if (atomicio(read, auth->fd, buf, 4) != 4) { |
147 | error("Error reading response length from authentication socket."); | |
148 | return 0; | |
c345cf9d | 149 | } |
150 | ||
151 | /* Extract the length, and check it for sanity. */ | |
51e7a012 | 152 | len = get_u32(buf); |
c345cf9d | 153 | if (len > 256 * 1024) |
bb92e5cc | 154 | fatal("Authentication response too long: %u", len); |
c345cf9d | 155 | |
156 | /* Read the rest of the response in to the buffer. */ | |
157 | buffer_clear(reply); | |
158 | while (len > 0) { | |
159 | l = len; | |
160 | if (l > sizeof(buf)) | |
161 | l = sizeof(buf); | |
05624c18 | 162 | if (atomicio(read, auth->fd, buf, l) != l) { |
c345cf9d | 163 | error("Error reading response from authentication socket."); |
164 | return 0; | |
165 | } | |
6c69a6a9 | 166 | buffer_append(reply, buf, l); |
c345cf9d | 167 | len -= l; |
168 | } | |
169 | return 1; | |
170 | } | |
171 | ||
aa3378df | 172 | /* |
173 | * Closes the agent socket if it should be closed (depends on how it was | |
174 | * obtained). The argument must have been returned by | |
175 | * ssh_get_authentication_socket(). | |
176 | */ | |
8efc0c15 | 177 | |
6ae2364d | 178 | void |
5260325f | 179 | ssh_close_authentication_socket(int sock) |
8efc0c15 | 180 | { |
5260325f | 181 | if (getenv(SSH_AUTHSOCKET_ENV_NAME)) |
182 | close(sock); | |
8efc0c15 | 183 | } |
184 | ||
aa3378df | 185 | /* |
186 | * Opens and connects a private socket for communication with the | |
187 | * authentication agent. Returns the file descriptor (which must be | |
188 | * shut down and closed by the caller when no longer needed). | |
189 | * Returns NULL if an error occurred and the connection could not be | |
190 | * opened. | |
191 | */ | |
8efc0c15 | 192 | |
5260325f | 193 | AuthenticationConnection * |
1e3b8b07 | 194 | ssh_get_authentication_connection(void) |
8efc0c15 | 195 | { |
5260325f | 196 | AuthenticationConnection *auth; |
197 | int sock; | |
198 | ||
199 | sock = ssh_get_authentication_socket(); | |
200 | ||
aa3378df | 201 | /* |
202 | * Fail if we couldn't obtain a connection. This happens if we | |
203 | * exited due to a timeout. | |
204 | */ | |
5260325f | 205 | if (sock < 0) |
206 | return NULL; | |
207 | ||
5260325f | 208 | auth = xmalloc(sizeof(*auth)); |
209 | auth->fd = sock; | |
5260325f | 210 | buffer_init(&auth->identities); |
211 | auth->howmany = 0; | |
212 | ||
213 | return auth; | |
8efc0c15 | 214 | } |
215 | ||
aa3378df | 216 | /* |
217 | * Closes the connection to the authentication agent and frees any associated | |
218 | * memory. | |
219 | */ | |
8efc0c15 | 220 | |
6ae2364d | 221 | void |
2e73a022 | 222 | ssh_close_authentication_connection(AuthenticationConnection *auth) |
8efc0c15 | 223 | { |
2e73a022 | 224 | buffer_free(&auth->identities); |
225 | close(auth->fd); | |
226 | xfree(auth); | |
8efc0c15 | 227 | } |
228 | ||
3db7f994 | 229 | /* Lock/unlock agent */ |
230 | int | |
231 | ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password) | |
232 | { | |
233 | int type; | |
234 | Buffer msg; | |
235 | ||
236 | buffer_init(&msg); | |
237 | buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK); | |
238 | buffer_put_cstring(&msg, password); | |
239 | ||
240 | if (ssh_request_reply(auth, &msg, &msg) == 0) { | |
241 | buffer_free(&msg); | |
242 | return 0; | |
243 | } | |
244 | type = buffer_get_char(&msg); | |
245 | buffer_free(&msg); | |
246 | return decode_reply(type); | |
247 | } | |
248 | ||
aa3378df | 249 | /* |
250 | * Returns the first authentication identity held by the agent. | |
aa3378df | 251 | */ |
8efc0c15 | 252 | |
fa08c86b | 253 | int |
254 | ssh_get_num_identities(AuthenticationConnection *auth, int version) | |
8efc0c15 | 255 | { |
2e73a022 | 256 | int type, code1 = 0, code2 = 0; |
c345cf9d | 257 | Buffer request; |
2e73a022 | 258 | |
6aacefa7 | 259 | switch (version) { |
2e73a022 | 260 | case 1: |
261 | code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES; | |
262 | code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER; | |
263 | break; | |
264 | case 2: | |
265 | code1 = SSH2_AGENTC_REQUEST_IDENTITIES; | |
266 | code2 = SSH2_AGENT_IDENTITIES_ANSWER; | |
267 | break; | |
268 | default: | |
fa08c86b | 269 | return 0; |
2e73a022 | 270 | } |
5260325f | 271 | |
aa3378df | 272 | /* |
273 | * Send a message to the agent requesting for a list of the | |
274 | * identities it can represent. | |
275 | */ | |
c345cf9d | 276 | buffer_init(&request); |
2e73a022 | 277 | buffer_put_char(&request, code1); |
5260325f | 278 | |
5260325f | 279 | buffer_clear(&auth->identities); |
c345cf9d | 280 | if (ssh_request_reply(auth, &request, &auth->identities) == 0) { |
281 | buffer_free(&request); | |
fa08c86b | 282 | return 0; |
8efc0c15 | 283 | } |
c345cf9d | 284 | buffer_free(&request); |
5260325f | 285 | |
286 | /* Get message type, and verify that we got a proper answer. */ | |
c345cf9d | 287 | type = buffer_get_char(&auth->identities); |
94ec8c6b | 288 | if (agent_failed(type)) { |
fa08c86b | 289 | return 0; |
2e73a022 | 290 | } else if (type != code2) { |
c345cf9d | 291 | fatal("Bad authentication reply message type: %d", type); |
2e73a022 | 292 | } |
5260325f | 293 | |
294 | /* Get the number of entries in the response and check it for sanity. */ | |
295 | auth->howmany = buffer_get_int(&auth->identities); | |
bb92e5cc | 296 | if ((u_int)auth->howmany > 1024) |
54b974dc | 297 | fatal("Too many identities in authentication reply: %d", |
c345cf9d | 298 | auth->howmany); |
5260325f | 299 | |
fa08c86b | 300 | return auth->howmany; |
301 | } | |
302 | ||
303 | Key * | |
304 | ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version) | |
305 | { | |
306 | /* get number of identities and return the first entry (if any). */ | |
307 | if (ssh_get_num_identities(auth, version) > 0) | |
308 | return ssh_get_next_identity(auth, comment, version); | |
309 | return NULL; | |
8efc0c15 | 310 | } |
311 | ||
2e73a022 | 312 | Key * |
313 | ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version) | |
8efc0c15 | 314 | { |
2ceb8101 | 315 | int keybits; |
1e3b8b07 | 316 | u_int bits; |
317 | u_char *blob; | |
318 | u_int blen; | |
2e73a022 | 319 | Key *key = NULL; |
4d195447 | 320 | |
5260325f | 321 | /* Return failure if no more entries. */ |
322 | if (auth->howmany <= 0) | |
2e73a022 | 323 | return NULL; |
8efc0c15 | 324 | |
aa3378df | 325 | /* |
326 | * Get the next entry from the packet. These will abort with a fatal | |
327 | * error if the packet is too short or contains corrupt data. | |
328 | */ | |
6aacefa7 | 329 | switch (version) { |
2e73a022 | 330 | case 1: |
fa08c86b | 331 | key = key_new(KEY_RSA1); |
2e73a022 | 332 | bits = buffer_get_int(&auth->identities); |
333 | buffer_get_bignum(&auth->identities, key->rsa->e); | |
334 | buffer_get_bignum(&auth->identities, key->rsa->n); | |
335 | *comment = buffer_get_string(&auth->identities, NULL); | |
2ceb8101 | 336 | keybits = BN_num_bits(key->rsa->n); |
337 | if (keybits < 0 || bits != (u_int)keybits) | |
bbe88b6d | 338 | logit("Warning: identity keysize mismatch: actual %d, announced %u", |
2e73a022 | 339 | BN_num_bits(key->rsa->n), bits); |
340 | break; | |
341 | case 2: | |
342 | blob = buffer_get_string(&auth->identities, &blen); | |
343 | *comment = buffer_get_string(&auth->identities, NULL); | |
fa08c86b | 344 | key = key_from_blob(blob, blen); |
2e73a022 | 345 | xfree(blob); |
346 | break; | |
347 | default: | |
348 | return NULL; | |
2e73a022 | 349 | } |
5260325f | 350 | /* Decrement the number of remaining entries. */ |
351 | auth->howmany--; | |
2e73a022 | 352 | return key; |
8efc0c15 | 353 | } |
354 | ||
aa3378df | 355 | /* |
356 | * Generates a random challenge, sends it to the agent, and waits for | |
357 | * response from the agent. Returns true (non-zero) if the agent gave the | |
358 | * correct answer, zero otherwise. Response type selects the style of | |
359 | * response desired, with 0 corresponding to protocol version 1.0 (no longer | |
360 | * supported) and 1 corresponding to protocol version 1.1. | |
361 | */ | |
8efc0c15 | 362 | |
363 | int | |
364 | ssh_decrypt_challenge(AuthenticationConnection *auth, | |
2e73a022 | 365 | Key* key, BIGNUM *challenge, |
1e3b8b07 | 366 | u_char session_id[16], |
367 | u_int response_type, | |
368 | u_char response[16]) | |
8efc0c15 | 369 | { |
5260325f | 370 | Buffer buffer; |
c345cf9d | 371 | int success = 0; |
372 | int i; | |
373 | int type; | |
5260325f | 374 | |
fa08c86b | 375 | if (key->type != KEY_RSA1) |
2e73a022 | 376 | return 0; |
377 | if (response_type == 0) { | |
bbe88b6d | 378 | logit("Compatibility with ssh protocol version 1.0 no longer supported."); |
2e73a022 | 379 | return 0; |
380 | } | |
5260325f | 381 | buffer_init(&buffer); |
c345cf9d | 382 | buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE); |
2e73a022 | 383 | buffer_put_int(&buffer, BN_num_bits(key->rsa->n)); |
384 | buffer_put_bignum(&buffer, key->rsa->e); | |
385 | buffer_put_bignum(&buffer, key->rsa->n); | |
5260325f | 386 | buffer_put_bignum(&buffer, challenge); |
e6207598 | 387 | buffer_append(&buffer, session_id, 16); |
5260325f | 388 | buffer_put_int(&buffer, response_type); |
389 | ||
c345cf9d | 390 | if (ssh_request_reply(auth, &buffer, &buffer) == 0) { |
5260325f | 391 | buffer_free(&buffer); |
392 | return 0; | |
393 | } | |
c345cf9d | 394 | type = buffer_get_char(&buffer); |
5260325f | 395 | |
94ec8c6b | 396 | if (agent_failed(type)) { |
bbe88b6d | 397 | logit("Agent admitted failure to authenticate using the key."); |
c345cf9d | 398 | } else if (type != SSH_AGENT_RSA_RESPONSE) { |
399 | fatal("Bad authentication response: %d", type); | |
400 | } else { | |
401 | success = 1; | |
402 | /* | |
403 | * Get the response from the packet. This will abort with a | |
404 | * fatal error if the packet is corrupt. | |
405 | */ | |
406 | for (i = 0; i < 16; i++) | |
febd6f21 | 407 | response[i] = (u_char)buffer_get_char(&buffer); |
8efc0c15 | 408 | } |
5260325f | 409 | buffer_free(&buffer); |
c345cf9d | 410 | return success; |
5260325f | 411 | } |
8efc0c15 | 412 | |
2e73a022 | 413 | /* ask agent to sign data, returns -1 on error, 0 on success */ |
414 | int | |
415 | ssh_agent_sign(AuthenticationConnection *auth, | |
416 | Key *key, | |
c66f9d0e | 417 | u_char **sigp, u_int *lenp, |
418 | u_char *data, u_int datalen) | |
2e73a022 | 419 | { |
188adeb2 | 420 | extern int datafellows; |
2e73a022 | 421 | Buffer msg; |
1e3b8b07 | 422 | u_char *blob; |
423 | u_int blen; | |
188adeb2 | 424 | int type, flags = 0; |
2e73a022 | 425 | int ret = -1; |
426 | ||
fa08c86b | 427 | if (key_to_blob(key, &blob, &blen) == 0) |
2e73a022 | 428 | return -1; |
429 | ||
188adeb2 | 430 | if (datafellows & SSH_BUG_SIGBLOB) |
431 | flags = SSH_AGENT_OLD_SIGNATURE; | |
432 | ||
2e73a022 | 433 | buffer_init(&msg); |
434 | buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST); | |
435 | buffer_put_string(&msg, blob, blen); | |
436 | buffer_put_string(&msg, data, datalen); | |
188adeb2 | 437 | buffer_put_int(&msg, flags); |
2e73a022 | 438 | xfree(blob); |
439 | ||
440 | if (ssh_request_reply(auth, &msg, &msg) == 0) { | |
441 | buffer_free(&msg); | |
442 | return -1; | |
443 | } | |
444 | type = buffer_get_char(&msg); | |
94ec8c6b | 445 | if (agent_failed(type)) { |
bbe88b6d | 446 | logit("Agent admitted failure to sign using the key."); |
2e73a022 | 447 | } else if (type != SSH2_AGENT_SIGN_RESPONSE) { |
448 | fatal("Bad authentication response: %d", type); | |
449 | } else { | |
450 | ret = 0; | |
451 | *sigp = buffer_get_string(&msg, lenp); | |
452 | } | |
453 | buffer_free(&msg); | |
454 | return ret; | |
455 | } | |
456 | ||
4c8722d9 | 457 | /* Encode key for a message to the agent. */ |
458 | ||
396c147e | 459 | static void |
fa08c86b | 460 | ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment) |
4c8722d9 | 461 | { |
4c8722d9 | 462 | buffer_put_int(b, BN_num_bits(key->n)); |
463 | buffer_put_bignum(b, key->n); | |
464 | buffer_put_bignum(b, key->e); | |
465 | buffer_put_bignum(b, key->d); | |
466 | /* To keep within the protocol: p < q for ssh. in SSL p > q */ | |
467 | buffer_put_bignum(b, key->iqmp); /* ssh key->u */ | |
468 | buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */ | |
469 | buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */ | |
449c5ba5 | 470 | buffer_put_cstring(b, comment); |
4c8722d9 | 471 | } |
472 | ||
396c147e | 473 | static void |
fa08c86b | 474 | ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment) |
4c8722d9 | 475 | { |
fa08c86b | 476 | buffer_put_cstring(b, key_ssh_name(key)); |
6aacefa7 | 477 | switch (key->type) { |
fa08c86b | 478 | case KEY_RSA: |
479 | buffer_put_bignum2(b, key->rsa->n); | |
480 | buffer_put_bignum2(b, key->rsa->e); | |
481 | buffer_put_bignum2(b, key->rsa->d); | |
482 | buffer_put_bignum2(b, key->rsa->iqmp); | |
483 | buffer_put_bignum2(b, key->rsa->p); | |
484 | buffer_put_bignum2(b, key->rsa->q); | |
485 | break; | |
486 | case KEY_DSA: | |
487 | buffer_put_bignum2(b, key->dsa->p); | |
488 | buffer_put_bignum2(b, key->dsa->q); | |
489 | buffer_put_bignum2(b, key->dsa->g); | |
490 | buffer_put_bignum2(b, key->dsa->pub_key); | |
491 | buffer_put_bignum2(b, key->dsa->priv_key); | |
492 | break; | |
493 | } | |
494 | buffer_put_cstring(b, comment); | |
4c8722d9 | 495 | } |
496 | ||
aa3378df | 497 | /* |
498 | * Adds an identity to the authentication server. This call is not meant to | |
499 | * be used by normal applications. | |
500 | */ | |
8efc0c15 | 501 | |
6ae2364d | 502 | int |
ee900f87 | 503 | ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key, |
c4087616 | 504 | const char *comment, u_int life, u_int confirm) |
8efc0c15 | 505 | { |
2e73a022 | 506 | Buffer msg; |
c4087616 | 507 | int type, constrained = (life || confirm); |
5260325f | 508 | |
2e73a022 | 509 | buffer_init(&msg); |
4c8722d9 | 510 | |
511 | switch (key->type) { | |
fa08c86b | 512 | case KEY_RSA1: |
ee900f87 | 513 | type = constrained ? |
514 | SSH_AGENTC_ADD_RSA_ID_CONSTRAINED : | |
515 | SSH_AGENTC_ADD_RSA_IDENTITY; | |
516 | buffer_put_char(&msg, type); | |
fa08c86b | 517 | ssh_encode_identity_rsa1(&msg, key->rsa, comment); |
4c8722d9 | 518 | break; |
fa08c86b | 519 | case KEY_RSA: |
4c8722d9 | 520 | case KEY_DSA: |
ee900f87 | 521 | type = constrained ? |
522 | SSH2_AGENTC_ADD_ID_CONSTRAINED : | |
523 | SSH2_AGENTC_ADD_IDENTITY; | |
524 | buffer_put_char(&msg, type); | |
fa08c86b | 525 | ssh_encode_identity_ssh2(&msg, key, comment); |
4c8722d9 | 526 | break; |
527 | default: | |
2e73a022 | 528 | buffer_free(&msg); |
4c8722d9 | 529 | return 0; |
4c8722d9 | 530 | } |
ee900f87 | 531 | if (constrained) { |
532 | if (life != 0) { | |
533 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); | |
534 | buffer_put_int(&msg, life); | |
535 | } | |
c4087616 | 536 | if (confirm != 0) |
537 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM); | |
ee900f87 | 538 | } |
2e73a022 | 539 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
540 | buffer_free(&msg); | |
5260325f | 541 | return 0; |
542 | } | |
2e73a022 | 543 | type = buffer_get_char(&msg); |
544 | buffer_free(&msg); | |
c345cf9d | 545 | return decode_reply(type); |
5260325f | 546 | } |
547 | ||
aa3378df | 548 | /* |
549 | * Removes an identity from the authentication server. This call is not | |
550 | * meant to be used by normal applications. | |
551 | */ | |
8efc0c15 | 552 | |
6ae2364d | 553 | int |
2e73a022 | 554 | ssh_remove_identity(AuthenticationConnection *auth, Key *key) |
8efc0c15 | 555 | { |
2e73a022 | 556 | Buffer msg; |
c345cf9d | 557 | int type; |
1e3b8b07 | 558 | u_char *blob; |
559 | u_int blen; | |
2e73a022 | 560 | |
561 | buffer_init(&msg); | |
562 | ||
fa08c86b | 563 | if (key->type == KEY_RSA1) { |
2e73a022 | 564 | buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY); |
565 | buffer_put_int(&msg, BN_num_bits(key->rsa->n)); | |
566 | buffer_put_bignum(&msg, key->rsa->e); | |
567 | buffer_put_bignum(&msg, key->rsa->n); | |
fa08c86b | 568 | } else if (key->type == KEY_DSA || key->type == KEY_RSA) { |
569 | key_to_blob(key, &blob, &blen); | |
2e73a022 | 570 | buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY); |
571 | buffer_put_string(&msg, blob, blen); | |
572 | xfree(blob); | |
573 | } else { | |
574 | buffer_free(&msg); | |
5260325f | 575 | return 0; |
576 | } | |
2e73a022 | 577 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
578 | buffer_free(&msg); | |
579 | return 0; | |
580 | } | |
581 | type = buffer_get_char(&msg); | |
582 | buffer_free(&msg); | |
c345cf9d | 583 | return decode_reply(type); |
5260325f | 584 | } |
585 | ||
983def13 | 586 | int |
aff51935 | 587 | ssh_update_card(AuthenticationConnection *auth, int add, |
ca719034 | 588 | const char *reader_id, const char *pin, u_int life, u_int confirm) |
983def13 | 589 | { |
590 | Buffer msg; | |
ca719034 | 591 | int type, constrained = (life || confirm); |
592 | ||
593 | if (add) { | |
594 | type = constrained ? | |
595 | SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED : | |
596 | SSH_AGENTC_ADD_SMARTCARD_KEY; | |
597 | } else | |
598 | type = SSH_AGENTC_REMOVE_SMARTCARD_KEY; | |
983def13 | 599 | |
600 | buffer_init(&msg); | |
ca719034 | 601 | buffer_put_char(&msg, type); |
9ff6f66f | 602 | buffer_put_cstring(&msg, reader_id); |
76139bd8 | 603 | buffer_put_cstring(&msg, pin); |
b6453d99 | 604 | |
ca719034 | 605 | if (constrained) { |
606 | if (life != 0) { | |
607 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); | |
608 | buffer_put_int(&msg, life); | |
609 | } | |
610 | if (confirm != 0) | |
611 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM); | |
612 | } | |
613 | ||
983def13 | 614 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
615 | buffer_free(&msg); | |
616 | return 0; | |
617 | } | |
618 | type = buffer_get_char(&msg); | |
619 | buffer_free(&msg); | |
620 | return decode_reply(type); | |
621 | } | |
622 | ||
aa3378df | 623 | /* |
624 | * Removes all identities from the agent. This call is not meant to be used | |
625 | * by normal applications. | |
626 | */ | |
8efc0c15 | 627 | |
6ae2364d | 628 | int |
2e73a022 | 629 | ssh_remove_all_identities(AuthenticationConnection *auth, int version) |
8efc0c15 | 630 | { |
2e73a022 | 631 | Buffer msg; |
c345cf9d | 632 | int type; |
2e73a022 | 633 | int code = (version==1) ? |
634 | SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : | |
635 | SSH2_AGENTC_REMOVE_ALL_IDENTITIES; | |
5260325f | 636 | |
2e73a022 | 637 | buffer_init(&msg); |
638 | buffer_put_char(&msg, code); | |
5260325f | 639 | |
2e73a022 | 640 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
641 | buffer_free(&msg); | |
5260325f | 642 | return 0; |
643 | } | |
2e73a022 | 644 | type = buffer_get_char(&msg); |
645 | buffer_free(&msg); | |
c345cf9d | 646 | return decode_reply(type); |
089fbbd2 | 647 | } |
648 | ||
2b87da3b | 649 | int |
c345cf9d | 650 | decode_reply(int type) |
089fbbd2 | 651 | { |
5260325f | 652 | switch (type) { |
653 | case SSH_AGENT_FAILURE: | |
94ec8c6b | 654 | case SSH_COM_AGENT2_FAILURE: |
65e683bd | 655 | case SSH2_AGENT_FAILURE: |
bbe88b6d | 656 | logit("SSH_AGENT_FAILURE"); |
5260325f | 657 | return 0; |
658 | case SSH_AGENT_SUCCESS: | |
5260325f | 659 | return 1; |
660 | default: | |
089fbbd2 | 661 | fatal("Bad response from authentication agent: %d", type); |
8efc0c15 | 662 | } |
5260325f | 663 | /* NOTREACHED */ |
664 | return 0; | |
665 | } |