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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
5260325f | 5 | * Functions for connecting the local authentication agent. |
6ae2364d | 6 | * |
bcbf86ec | 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 | * | |
2e73a022 | 13 | * SSH2 implementation, |
bcbf86ec | 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. | |
2e73a022 | 24 | * |
bcbf86ec | 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. | |
5260325f | 35 | */ |
8efc0c15 | 36 | |
37 | #include "includes.h" | |
405e0c5e | 38 | RCSID("$OpenBSD: authfd.c,v 1.53 2002/06/15 00:07:38 markus Exp $"); |
42f11eb2 | 39 | |
40 | #include <openssl/evp.h> | |
8efc0c15 | 41 | |
42 | #include "ssh.h" | |
43 | #include "rsa.h" | |
8efc0c15 | 44 | #include "buffer.h" |
45 | #include "bufaux.h" | |
46 | #include "xmalloc.h" | |
47 | #include "getput.h" | |
4c8722d9 | 48 | #include "key.h" |
49 | #include "authfd.h" | |
42f11eb2 | 50 | #include "cipher.h" |
4c8722d9 | 51 | #include "kex.h" |
188adeb2 | 52 | #include "compat.h" |
42f11eb2 | 53 | #include "log.h" |
54 | #include "atomicio.h" | |
8efc0c15 | 55 | |
089fbbd2 | 56 | /* helper */ |
c345cf9d | 57 | int decode_reply(int type); |
089fbbd2 | 58 | |
94ec8c6b | 59 | /* macro to check for "agent failure" message */ |
60 | #define agent_failed(x) \ | |
65e683bd | 61 | ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \ |
62 | (x == SSH2_AGENT_FAILURE)) | |
94ec8c6b | 63 | |
8efc0c15 | 64 | /* Returns the number of the authentication fd, or -1 if there is none. */ |
65 | ||
66 | int | |
1e3b8b07 | 67 | ssh_get_authentication_socket(void) |
8efc0c15 | 68 | { |
5260325f | 69 | const char *authsocket; |
f34f05d5 | 70 | int sock; |
5260325f | 71 | struct sockaddr_un sunaddr; |
72 | ||
73 | authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME); | |
74 | if (!authsocket) | |
75 | return -1; | |
76 | ||
77 | sunaddr.sun_family = AF_UNIX; | |
78 | strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path)); | |
79 | ||
80 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
81 | if (sock < 0) | |
82 | return -1; | |
83 | ||
84 | /* close on exec */ | |
85 | if (fcntl(sock, F_SETFD, 1) == -1) { | |
86 | close(sock); | |
87 | return -1; | |
88 | } | |
f34f05d5 | 89 | if (connect(sock, (struct sockaddr *) &sunaddr, sizeof sunaddr) < 0) { |
5260325f | 90 | close(sock); |
91 | return -1; | |
92 | } | |
93 | return sock; | |
8efc0c15 | 94 | } |
95 | ||
396c147e | 96 | static int |
2e73a022 | 97 | ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply) |
c345cf9d | 98 | { |
99 | int l, len; | |
100 | char buf[1024]; | |
101 | ||
102 | /* Get the length of the message, and format it in the buffer. */ | |
103 | len = buffer_len(request); | |
104 | PUT_32BIT(buf, len); | |
105 | ||
106 | /* Send the length and then the packet to the agent. */ | |
107 | if (atomicio(write, auth->fd, buf, 4) != 4 || | |
108 | atomicio(write, auth->fd, buffer_ptr(request), | |
109 | buffer_len(request)) != buffer_len(request)) { | |
110 | error("Error writing to authentication socket."); | |
111 | return 0; | |
112 | } | |
113 | /* | |
114 | * Wait for response from the agent. First read the length of the | |
115 | * response packet. | |
116 | */ | |
117 | len = 4; | |
118 | while (len > 0) { | |
119 | l = read(auth->fd, buf + 4 - len, len); | |
bbc62e59 | 120 | if (l == -1 && (errno == EAGAIN || errno == EINTR)) |
cd332296 | 121 | continue; |
c345cf9d | 122 | if (l <= 0) { |
123 | error("Error reading response length from authentication socket."); | |
124 | return 0; | |
125 | } | |
126 | len -= l; | |
127 | } | |
128 | ||
129 | /* Extract the length, and check it for sanity. */ | |
130 | len = GET_32BIT(buf); | |
131 | if (len > 256 * 1024) | |
132 | fatal("Authentication response too long: %d", len); | |
133 | ||
134 | /* Read the rest of the response in to the buffer. */ | |
135 | buffer_clear(reply); | |
136 | while (len > 0) { | |
137 | l = len; | |
138 | if (l > sizeof(buf)) | |
139 | l = sizeof(buf); | |
140 | l = read(auth->fd, buf, l); | |
bbc62e59 | 141 | if (l == -1 && (errno == EAGAIN || errno == EINTR)) |
cd332296 | 142 | continue; |
c345cf9d | 143 | if (l <= 0) { |
144 | error("Error reading response from authentication socket."); | |
145 | return 0; | |
146 | } | |
147 | buffer_append(reply, (char *) buf, l); | |
148 | len -= l; | |
149 | } | |
150 | return 1; | |
151 | } | |
152 | ||
aa3378df | 153 | /* |
154 | * Closes the agent socket if it should be closed (depends on how it was | |
155 | * obtained). The argument must have been returned by | |
156 | * ssh_get_authentication_socket(). | |
157 | */ | |
8efc0c15 | 158 | |
6ae2364d | 159 | void |
5260325f | 160 | ssh_close_authentication_socket(int sock) |
8efc0c15 | 161 | { |
5260325f | 162 | if (getenv(SSH_AUTHSOCKET_ENV_NAME)) |
163 | close(sock); | |
8efc0c15 | 164 | } |
165 | ||
aa3378df | 166 | /* |
167 | * Opens and connects a private socket for communication with the | |
168 | * authentication agent. Returns the file descriptor (which must be | |
169 | * shut down and closed by the caller when no longer needed). | |
170 | * Returns NULL if an error occurred and the connection could not be | |
171 | * opened. | |
172 | */ | |
8efc0c15 | 173 | |
5260325f | 174 | AuthenticationConnection * |
1e3b8b07 | 175 | ssh_get_authentication_connection(void) |
8efc0c15 | 176 | { |
5260325f | 177 | AuthenticationConnection *auth; |
178 | int sock; | |
179 | ||
180 | sock = ssh_get_authentication_socket(); | |
181 | ||
aa3378df | 182 | /* |
183 | * Fail if we couldn't obtain a connection. This happens if we | |
184 | * exited due to a timeout. | |
185 | */ | |
5260325f | 186 | if (sock < 0) |
187 | return NULL; | |
188 | ||
5260325f | 189 | auth = xmalloc(sizeof(*auth)); |
190 | auth->fd = sock; | |
5260325f | 191 | buffer_init(&auth->identities); |
192 | auth->howmany = 0; | |
193 | ||
194 | return auth; | |
8efc0c15 | 195 | } |
196 | ||
aa3378df | 197 | /* |
198 | * Closes the connection to the authentication agent and frees any associated | |
199 | * memory. | |
200 | */ | |
8efc0c15 | 201 | |
6ae2364d | 202 | void |
2e73a022 | 203 | ssh_close_authentication_connection(AuthenticationConnection *auth) |
8efc0c15 | 204 | { |
2e73a022 | 205 | buffer_free(&auth->identities); |
206 | close(auth->fd); | |
207 | xfree(auth); | |
8efc0c15 | 208 | } |
209 | ||
3db7f994 | 210 | /* Lock/unlock agent */ |
211 | int | |
212 | ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password) | |
213 | { | |
214 | int type; | |
215 | Buffer msg; | |
216 | ||
217 | buffer_init(&msg); | |
218 | buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK); | |
219 | buffer_put_cstring(&msg, password); | |
220 | ||
221 | if (ssh_request_reply(auth, &msg, &msg) == 0) { | |
222 | buffer_free(&msg); | |
223 | return 0; | |
224 | } | |
225 | type = buffer_get_char(&msg); | |
226 | buffer_free(&msg); | |
227 | return decode_reply(type); | |
228 | } | |
229 | ||
aa3378df | 230 | /* |
231 | * Returns the first authentication identity held by the agent. | |
aa3378df | 232 | */ |
8efc0c15 | 233 | |
fa08c86b | 234 | int |
235 | ssh_get_num_identities(AuthenticationConnection *auth, int version) | |
8efc0c15 | 236 | { |
2e73a022 | 237 | int type, code1 = 0, code2 = 0; |
c345cf9d | 238 | Buffer request; |
2e73a022 | 239 | |
6aacefa7 | 240 | switch (version) { |
2e73a022 | 241 | case 1: |
242 | code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES; | |
243 | code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER; | |
244 | break; | |
245 | case 2: | |
246 | code1 = SSH2_AGENTC_REQUEST_IDENTITIES; | |
247 | code2 = SSH2_AGENT_IDENTITIES_ANSWER; | |
248 | break; | |
249 | default: | |
fa08c86b | 250 | return 0; |
2e73a022 | 251 | } |
5260325f | 252 | |
aa3378df | 253 | /* |
254 | * Send a message to the agent requesting for a list of the | |
255 | * identities it can represent. | |
256 | */ | |
c345cf9d | 257 | buffer_init(&request); |
2e73a022 | 258 | buffer_put_char(&request, code1); |
5260325f | 259 | |
5260325f | 260 | buffer_clear(&auth->identities); |
c345cf9d | 261 | if (ssh_request_reply(auth, &request, &auth->identities) == 0) { |
262 | buffer_free(&request); | |
fa08c86b | 263 | return 0; |
8efc0c15 | 264 | } |
c345cf9d | 265 | buffer_free(&request); |
5260325f | 266 | |
267 | /* Get message type, and verify that we got a proper answer. */ | |
c345cf9d | 268 | type = buffer_get_char(&auth->identities); |
94ec8c6b | 269 | if (agent_failed(type)) { |
fa08c86b | 270 | return 0; |
2e73a022 | 271 | } else if (type != code2) { |
c345cf9d | 272 | fatal("Bad authentication reply message type: %d", type); |
2e73a022 | 273 | } |
5260325f | 274 | |
275 | /* Get the number of entries in the response and check it for sanity. */ | |
276 | auth->howmany = buffer_get_int(&auth->identities); | |
277 | if (auth->howmany > 1024) | |
54b974dc | 278 | fatal("Too many identities in authentication reply: %d", |
c345cf9d | 279 | auth->howmany); |
5260325f | 280 | |
fa08c86b | 281 | return auth->howmany; |
282 | } | |
283 | ||
284 | Key * | |
285 | ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version) | |
286 | { | |
287 | /* get number of identities and return the first entry (if any). */ | |
288 | if (ssh_get_num_identities(auth, version) > 0) | |
289 | return ssh_get_next_identity(auth, comment, version); | |
290 | return NULL; | |
8efc0c15 | 291 | } |
292 | ||
2e73a022 | 293 | Key * |
294 | ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version) | |
8efc0c15 | 295 | { |
1e3b8b07 | 296 | u_int bits; |
297 | u_char *blob; | |
298 | u_int blen; | |
2e73a022 | 299 | Key *key = NULL; |
4d195447 | 300 | |
5260325f | 301 | /* Return failure if no more entries. */ |
302 | if (auth->howmany <= 0) | |
2e73a022 | 303 | return NULL; |
8efc0c15 | 304 | |
aa3378df | 305 | /* |
306 | * Get the next entry from the packet. These will abort with a fatal | |
307 | * error if the packet is too short or contains corrupt data. | |
308 | */ | |
6aacefa7 | 309 | switch (version) { |
2e73a022 | 310 | case 1: |
fa08c86b | 311 | key = key_new(KEY_RSA1); |
2e73a022 | 312 | bits = buffer_get_int(&auth->identities); |
313 | buffer_get_bignum(&auth->identities, key->rsa->e); | |
314 | buffer_get_bignum(&auth->identities, key->rsa->n); | |
315 | *comment = buffer_get_string(&auth->identities, NULL); | |
316 | if (bits != BN_num_bits(key->rsa->n)) | |
317 | log("Warning: identity keysize mismatch: actual %d, announced %u", | |
318 | BN_num_bits(key->rsa->n), bits); | |
319 | break; | |
320 | case 2: | |
321 | blob = buffer_get_string(&auth->identities, &blen); | |
322 | *comment = buffer_get_string(&auth->identities, NULL); | |
fa08c86b | 323 | key = key_from_blob(blob, blen); |
2e73a022 | 324 | xfree(blob); |
325 | break; | |
326 | default: | |
327 | return NULL; | |
328 | break; | |
329 | } | |
5260325f | 330 | /* Decrement the number of remaining entries. */ |
331 | auth->howmany--; | |
2e73a022 | 332 | return key; |
8efc0c15 | 333 | } |
334 | ||
aa3378df | 335 | /* |
336 | * Generates a random challenge, sends it to the agent, and waits for | |
337 | * response from the agent. Returns true (non-zero) if the agent gave the | |
338 | * correct answer, zero otherwise. Response type selects the style of | |
339 | * response desired, with 0 corresponding to protocol version 1.0 (no longer | |
340 | * supported) and 1 corresponding to protocol version 1.1. | |
341 | */ | |
8efc0c15 | 342 | |
343 | int | |
344 | ssh_decrypt_challenge(AuthenticationConnection *auth, | |
2e73a022 | 345 | Key* key, BIGNUM *challenge, |
1e3b8b07 | 346 | u_char session_id[16], |
347 | u_int response_type, | |
348 | u_char response[16]) | |
8efc0c15 | 349 | { |
5260325f | 350 | Buffer buffer; |
c345cf9d | 351 | int success = 0; |
352 | int i; | |
353 | int type; | |
5260325f | 354 | |
fa08c86b | 355 | if (key->type != KEY_RSA1) |
2e73a022 | 356 | return 0; |
357 | if (response_type == 0) { | |
358 | log("Compatibility with ssh protocol version 1.0 no longer supported."); | |
359 | return 0; | |
360 | } | |
5260325f | 361 | buffer_init(&buffer); |
c345cf9d | 362 | buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE); |
2e73a022 | 363 | buffer_put_int(&buffer, BN_num_bits(key->rsa->n)); |
364 | buffer_put_bignum(&buffer, key->rsa->e); | |
365 | buffer_put_bignum(&buffer, key->rsa->n); | |
5260325f | 366 | buffer_put_bignum(&buffer, challenge); |
e6207598 | 367 | buffer_append(&buffer, session_id, 16); |
5260325f | 368 | buffer_put_int(&buffer, response_type); |
369 | ||
c345cf9d | 370 | if (ssh_request_reply(auth, &buffer, &buffer) == 0) { |
5260325f | 371 | buffer_free(&buffer); |
372 | return 0; | |
373 | } | |
c345cf9d | 374 | type = buffer_get_char(&buffer); |
5260325f | 375 | |
94ec8c6b | 376 | if (agent_failed(type)) { |
5260325f | 377 | log("Agent admitted failure to authenticate using the key."); |
c345cf9d | 378 | } else if (type != SSH_AGENT_RSA_RESPONSE) { |
379 | fatal("Bad authentication response: %d", type); | |
380 | } else { | |
381 | success = 1; | |
382 | /* | |
383 | * Get the response from the packet. This will abort with a | |
384 | * fatal error if the packet is corrupt. | |
385 | */ | |
386 | for (i = 0; i < 16; i++) | |
387 | response[i] = buffer_get_char(&buffer); | |
8efc0c15 | 388 | } |
5260325f | 389 | buffer_free(&buffer); |
c345cf9d | 390 | return success; |
5260325f | 391 | } |
8efc0c15 | 392 | |
2e73a022 | 393 | /* ask agent to sign data, returns -1 on error, 0 on success */ |
394 | int | |
395 | ssh_agent_sign(AuthenticationConnection *auth, | |
396 | Key *key, | |
c66f9d0e | 397 | u_char **sigp, u_int *lenp, |
398 | u_char *data, u_int datalen) | |
2e73a022 | 399 | { |
188adeb2 | 400 | extern int datafellows; |
2e73a022 | 401 | Buffer msg; |
1e3b8b07 | 402 | u_char *blob; |
403 | u_int blen; | |
188adeb2 | 404 | int type, flags = 0; |
2e73a022 | 405 | int ret = -1; |
406 | ||
fa08c86b | 407 | if (key_to_blob(key, &blob, &blen) == 0) |
2e73a022 | 408 | return -1; |
409 | ||
188adeb2 | 410 | if (datafellows & SSH_BUG_SIGBLOB) |
411 | flags = SSH_AGENT_OLD_SIGNATURE; | |
412 | ||
2e73a022 | 413 | buffer_init(&msg); |
414 | buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST); | |
415 | buffer_put_string(&msg, blob, blen); | |
416 | buffer_put_string(&msg, data, datalen); | |
188adeb2 | 417 | buffer_put_int(&msg, flags); |
2e73a022 | 418 | xfree(blob); |
419 | ||
420 | if (ssh_request_reply(auth, &msg, &msg) == 0) { | |
421 | buffer_free(&msg); | |
422 | return -1; | |
423 | } | |
424 | type = buffer_get_char(&msg); | |
94ec8c6b | 425 | if (agent_failed(type)) { |
2e73a022 | 426 | log("Agent admitted failure to sign using the key."); |
427 | } else if (type != SSH2_AGENT_SIGN_RESPONSE) { | |
428 | fatal("Bad authentication response: %d", type); | |
429 | } else { | |
430 | ret = 0; | |
431 | *sigp = buffer_get_string(&msg, lenp); | |
432 | } | |
433 | buffer_free(&msg); | |
434 | return ret; | |
435 | } | |
436 | ||
4c8722d9 | 437 | /* Encode key for a message to the agent. */ |
438 | ||
396c147e | 439 | static void |
fa08c86b | 440 | ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment) |
4c8722d9 | 441 | { |
442 | buffer_clear(b); | |
443 | buffer_put_char(b, SSH_AGENTC_ADD_RSA_IDENTITY); | |
444 | buffer_put_int(b, BN_num_bits(key->n)); | |
445 | buffer_put_bignum(b, key->n); | |
446 | buffer_put_bignum(b, key->e); | |
447 | buffer_put_bignum(b, key->d); | |
448 | /* To keep within the protocol: p < q for ssh. in SSL p > q */ | |
449 | buffer_put_bignum(b, key->iqmp); /* ssh key->u */ | |
450 | buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */ | |
451 | buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */ | |
449c5ba5 | 452 | buffer_put_cstring(b, comment); |
4c8722d9 | 453 | } |
454 | ||
396c147e | 455 | static void |
fa08c86b | 456 | ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment) |
4c8722d9 | 457 | { |
458 | buffer_clear(b); | |
459 | buffer_put_char(b, SSH2_AGENTC_ADD_IDENTITY); | |
fa08c86b | 460 | buffer_put_cstring(b, key_ssh_name(key)); |
6aacefa7 | 461 | switch (key->type) { |
fa08c86b | 462 | case KEY_RSA: |
463 | buffer_put_bignum2(b, key->rsa->n); | |
464 | buffer_put_bignum2(b, key->rsa->e); | |
465 | buffer_put_bignum2(b, key->rsa->d); | |
466 | buffer_put_bignum2(b, key->rsa->iqmp); | |
467 | buffer_put_bignum2(b, key->rsa->p); | |
468 | buffer_put_bignum2(b, key->rsa->q); | |
469 | break; | |
470 | case KEY_DSA: | |
471 | buffer_put_bignum2(b, key->dsa->p); | |
472 | buffer_put_bignum2(b, key->dsa->q); | |
473 | buffer_put_bignum2(b, key->dsa->g); | |
474 | buffer_put_bignum2(b, key->dsa->pub_key); | |
475 | buffer_put_bignum2(b, key->dsa->priv_key); | |
476 | break; | |
477 | } | |
478 | buffer_put_cstring(b, comment); | |
4c8722d9 | 479 | } |
480 | ||
aa3378df | 481 | /* |
482 | * Adds an identity to the authentication server. This call is not meant to | |
483 | * be used by normal applications. | |
484 | */ | |
8efc0c15 | 485 | |
6ae2364d | 486 | int |
4c8722d9 | 487 | ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment) |
8efc0c15 | 488 | { |
2e73a022 | 489 | Buffer msg; |
c345cf9d | 490 | int type; |
5260325f | 491 | |
2e73a022 | 492 | buffer_init(&msg); |
4c8722d9 | 493 | |
494 | switch (key->type) { | |
fa08c86b | 495 | case KEY_RSA1: |
496 | ssh_encode_identity_rsa1(&msg, key->rsa, comment); | |
4c8722d9 | 497 | break; |
fa08c86b | 498 | case KEY_RSA: |
4c8722d9 | 499 | case KEY_DSA: |
fa08c86b | 500 | ssh_encode_identity_ssh2(&msg, key, comment); |
4c8722d9 | 501 | break; |
502 | default: | |
2e73a022 | 503 | buffer_free(&msg); |
4c8722d9 | 504 | return 0; |
505 | break; | |
506 | } | |
2e73a022 | 507 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
508 | buffer_free(&msg); | |
5260325f | 509 | return 0; |
510 | } | |
2e73a022 | 511 | type = buffer_get_char(&msg); |
512 | buffer_free(&msg); | |
c345cf9d | 513 | return decode_reply(type); |
5260325f | 514 | } |
515 | ||
aa3378df | 516 | /* |
517 | * Removes an identity from the authentication server. This call is not | |
518 | * meant to be used by normal applications. | |
519 | */ | |
8efc0c15 | 520 | |
6ae2364d | 521 | int |
2e73a022 | 522 | ssh_remove_identity(AuthenticationConnection *auth, Key *key) |
8efc0c15 | 523 | { |
2e73a022 | 524 | Buffer msg; |
c345cf9d | 525 | int type; |
1e3b8b07 | 526 | u_char *blob; |
527 | u_int blen; | |
2e73a022 | 528 | |
529 | buffer_init(&msg); | |
530 | ||
fa08c86b | 531 | if (key->type == KEY_RSA1) { |
2e73a022 | 532 | buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY); |
533 | buffer_put_int(&msg, BN_num_bits(key->rsa->n)); | |
534 | buffer_put_bignum(&msg, key->rsa->e); | |
535 | buffer_put_bignum(&msg, key->rsa->n); | |
fa08c86b | 536 | } else if (key->type == KEY_DSA || key->type == KEY_RSA) { |
537 | key_to_blob(key, &blob, &blen); | |
2e73a022 | 538 | buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY); |
539 | buffer_put_string(&msg, blob, blen); | |
540 | xfree(blob); | |
541 | } else { | |
542 | buffer_free(&msg); | |
5260325f | 543 | return 0; |
544 | } | |
2e73a022 | 545 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
546 | buffer_free(&msg); | |
547 | return 0; | |
548 | } | |
549 | type = buffer_get_char(&msg); | |
550 | buffer_free(&msg); | |
c345cf9d | 551 | return decode_reply(type); |
5260325f | 552 | } |
553 | ||
264572cc | 554 | int |
405e0c5e | 555 | ssh_constrain_identity(AuthenticationConnection *auth, Key *key, u_int life) |
264572cc | 556 | { |
557 | Buffer msg; | |
558 | int type; | |
559 | u_char *blob; | |
560 | u_int blen; | |
561 | ||
562 | buffer_init(&msg); | |
563 | ||
564 | if (key->type == KEY_RSA1) { | |
405e0c5e | 565 | buffer_put_char(&msg, SSH_AGENTC_CONSTRAIN_IDENTITY1); |
264572cc | 566 | buffer_put_int(&msg, BN_num_bits(key->rsa->n)); |
567 | buffer_put_bignum(&msg, key->rsa->e); | |
568 | buffer_put_bignum(&msg, key->rsa->n); | |
569 | } else if (key->type == KEY_DSA || key->type == KEY_RSA) { | |
570 | key_to_blob(key, &blob, &blen); | |
405e0c5e | 571 | buffer_put_char(&msg, SSH_AGENTC_CONSTRAIN_IDENTITY); |
264572cc | 572 | buffer_put_string(&msg, blob, blen); |
573 | xfree(blob); | |
574 | } else { | |
575 | buffer_free(&msg); | |
576 | return 0; | |
577 | } | |
405e0c5e | 578 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); |
37500e74 | 579 | buffer_put_int(&msg, life); |
580 | ||
264572cc | 581 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
582 | buffer_free(&msg); | |
583 | return 0; | |
584 | } | |
585 | type = buffer_get_char(&msg); | |
586 | buffer_free(&msg); | |
587 | return decode_reply(type); | |
588 | } | |
589 | ||
983def13 | 590 | int |
76139bd8 | 591 | ssh_update_card(AuthenticationConnection *auth, int add, const char *reader_id, const char *pin) |
983def13 | 592 | { |
593 | Buffer msg; | |
594 | int type; | |
595 | ||
596 | buffer_init(&msg); | |
597 | buffer_put_char(&msg, add ? SSH_AGENTC_ADD_SMARTCARD_KEY : | |
598 | SSH_AGENTC_REMOVE_SMARTCARD_KEY); | |
9ff6f66f | 599 | buffer_put_cstring(&msg, reader_id); |
76139bd8 | 600 | buffer_put_cstring(&msg, pin); |
983def13 | 601 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
602 | buffer_free(&msg); | |
603 | return 0; | |
604 | } | |
605 | type = buffer_get_char(&msg); | |
606 | buffer_free(&msg); | |
607 | return decode_reply(type); | |
608 | } | |
609 | ||
aa3378df | 610 | /* |
611 | * Removes all identities from the agent. This call is not meant to be used | |
612 | * by normal applications. | |
613 | */ | |
8efc0c15 | 614 | |
6ae2364d | 615 | int |
2e73a022 | 616 | ssh_remove_all_identities(AuthenticationConnection *auth, int version) |
8efc0c15 | 617 | { |
2e73a022 | 618 | Buffer msg; |
c345cf9d | 619 | int type; |
2e73a022 | 620 | int code = (version==1) ? |
621 | SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : | |
622 | SSH2_AGENTC_REMOVE_ALL_IDENTITIES; | |
5260325f | 623 | |
2e73a022 | 624 | buffer_init(&msg); |
625 | buffer_put_char(&msg, code); | |
5260325f | 626 | |
2e73a022 | 627 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
628 | buffer_free(&msg); | |
5260325f | 629 | return 0; |
630 | } | |
2e73a022 | 631 | type = buffer_get_char(&msg); |
632 | buffer_free(&msg); | |
c345cf9d | 633 | return decode_reply(type); |
089fbbd2 | 634 | } |
635 | ||
2b87da3b | 636 | int |
c345cf9d | 637 | decode_reply(int type) |
089fbbd2 | 638 | { |
5260325f | 639 | switch (type) { |
640 | case SSH_AGENT_FAILURE: | |
94ec8c6b | 641 | case SSH_COM_AGENT2_FAILURE: |
65e683bd | 642 | case SSH2_AGENT_FAILURE: |
c345cf9d | 643 | log("SSH_AGENT_FAILURE"); |
5260325f | 644 | return 0; |
645 | case SSH_AGENT_SUCCESS: | |
5260325f | 646 | return 1; |
647 | default: | |
089fbbd2 | 648 | fatal("Bad response from authentication agent: %d", type); |
8efc0c15 | 649 | } |
5260325f | 650 | /* NOTREACHED */ |
651 | return 0; | |
652 | } |