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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" | |
bbc62e59 | 38 | RCSID("$OpenBSD: authfd.c,v 1.38 2001/03/06 00:33:03 deraadt 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) \ | |
61 | ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE)) | |
62 | ||
8efc0c15 | 63 | /* Returns the number of the authentication fd, or -1 if there is none. */ |
64 | ||
65 | int | |
1e3b8b07 | 66 | ssh_get_authentication_socket(void) |
8efc0c15 | 67 | { |
5260325f | 68 | const char *authsocket; |
c345cf9d | 69 | int sock, len; |
5260325f | 70 | struct sockaddr_un sunaddr; |
71 | ||
72 | authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME); | |
73 | if (!authsocket) | |
74 | return -1; | |
75 | ||
76 | sunaddr.sun_family = AF_UNIX; | |
77 | strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path)); | |
c345cf9d | 78 | len = SUN_LEN(&sunaddr)+1; |
c3f7d267 | 79 | #ifdef HAVE_SUN_LEN_IN_SOCKADDR_UN |
80 | sunaddr.sun_len = len; | |
c345cf9d | 81 | #endif /* HAVE_SUN_LEN_IN_SOCKADDR_UN */ |
5260325f | 82 | |
83 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
84 | if (sock < 0) | |
85 | return -1; | |
86 | ||
87 | /* close on exec */ | |
88 | if (fcntl(sock, F_SETFD, 1) == -1) { | |
89 | close(sock); | |
90 | return -1; | |
91 | } | |
c345cf9d | 92 | if (connect(sock, (struct sockaddr *) & sunaddr, len) < 0) { |
5260325f | 93 | close(sock); |
94 | return -1; | |
95 | } | |
96 | return sock; | |
8efc0c15 | 97 | } |
98 | ||
c345cf9d | 99 | int |
2e73a022 | 100 | ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply) |
c345cf9d | 101 | { |
102 | int l, len; | |
103 | char buf[1024]; | |
104 | ||
105 | /* Get the length of the message, and format it in the buffer. */ | |
106 | len = buffer_len(request); | |
107 | PUT_32BIT(buf, len); | |
108 | ||
109 | /* Send the length and then the packet to the agent. */ | |
110 | if (atomicio(write, auth->fd, buf, 4) != 4 || | |
111 | atomicio(write, auth->fd, buffer_ptr(request), | |
112 | buffer_len(request)) != buffer_len(request)) { | |
113 | error("Error writing to authentication socket."); | |
114 | return 0; | |
115 | } | |
116 | /* | |
117 | * Wait for response from the agent. First read the length of the | |
118 | * response packet. | |
119 | */ | |
120 | len = 4; | |
121 | while (len > 0) { | |
122 | l = read(auth->fd, buf + 4 - len, len); | |
bbc62e59 | 123 | if (l == -1 && (errno == EAGAIN || errno == EINTR)) |
124 | continue; | |
c345cf9d | 125 | if (l <= 0) { |
126 | error("Error reading response length from authentication socket."); | |
127 | return 0; | |
128 | } | |
129 | len -= l; | |
130 | } | |
131 | ||
132 | /* Extract the length, and check it for sanity. */ | |
133 | len = GET_32BIT(buf); | |
134 | if (len > 256 * 1024) | |
135 | fatal("Authentication response too long: %d", len); | |
136 | ||
137 | /* Read the rest of the response in to the buffer. */ | |
138 | buffer_clear(reply); | |
139 | while (len > 0) { | |
140 | l = len; | |
141 | if (l > sizeof(buf)) | |
142 | l = sizeof(buf); | |
143 | l = read(auth->fd, buf, l); | |
bbc62e59 | 144 | if (l == -1 && (errno == EAGAIN || errno == EINTR)) |
145 | continue; | |
c345cf9d | 146 | if (l <= 0) { |
147 | error("Error reading response from authentication socket."); | |
148 | return 0; | |
149 | } | |
150 | buffer_append(reply, (char *) buf, l); | |
151 | len -= l; | |
152 | } | |
153 | return 1; | |
154 | } | |
155 | ||
aa3378df | 156 | /* |
157 | * Closes the agent socket if it should be closed (depends on how it was | |
158 | * obtained). The argument must have been returned by | |
159 | * ssh_get_authentication_socket(). | |
160 | */ | |
8efc0c15 | 161 | |
6ae2364d | 162 | void |
5260325f | 163 | ssh_close_authentication_socket(int sock) |
8efc0c15 | 164 | { |
5260325f | 165 | if (getenv(SSH_AUTHSOCKET_ENV_NAME)) |
166 | close(sock); | |
8efc0c15 | 167 | } |
168 | ||
aa3378df | 169 | /* |
170 | * Opens and connects a private socket for communication with the | |
171 | * authentication agent. Returns the file descriptor (which must be | |
172 | * shut down and closed by the caller when no longer needed). | |
173 | * Returns NULL if an error occurred and the connection could not be | |
174 | * opened. | |
175 | */ | |
8efc0c15 | 176 | |
5260325f | 177 | AuthenticationConnection * |
1e3b8b07 | 178 | ssh_get_authentication_connection(void) |
8efc0c15 | 179 | { |
5260325f | 180 | AuthenticationConnection *auth; |
181 | int sock; | |
182 | ||
183 | sock = ssh_get_authentication_socket(); | |
184 | ||
aa3378df | 185 | /* |
186 | * Fail if we couldn't obtain a connection. This happens if we | |
187 | * exited due to a timeout. | |
188 | */ | |
5260325f | 189 | if (sock < 0) |
190 | return NULL; | |
191 | ||
5260325f | 192 | auth = xmalloc(sizeof(*auth)); |
193 | auth->fd = sock; | |
5260325f | 194 | buffer_init(&auth->identities); |
195 | auth->howmany = 0; | |
196 | ||
197 | return auth; | |
8efc0c15 | 198 | } |
199 | ||
aa3378df | 200 | /* |
201 | * Closes the connection to the authentication agent and frees any associated | |
202 | * memory. | |
203 | */ | |
8efc0c15 | 204 | |
6ae2364d | 205 | void |
2e73a022 | 206 | ssh_close_authentication_connection(AuthenticationConnection *auth) |
8efc0c15 | 207 | { |
2e73a022 | 208 | buffer_free(&auth->identities); |
209 | close(auth->fd); | |
210 | xfree(auth); | |
8efc0c15 | 211 | } |
212 | ||
aa3378df | 213 | /* |
214 | * Returns the first authentication identity held by the agent. | |
aa3378df | 215 | */ |
8efc0c15 | 216 | |
fa08c86b | 217 | int |
218 | ssh_get_num_identities(AuthenticationConnection *auth, int version) | |
8efc0c15 | 219 | { |
2e73a022 | 220 | int type, code1 = 0, code2 = 0; |
c345cf9d | 221 | Buffer request; |
2e73a022 | 222 | |
223 | switch(version){ | |
224 | case 1: | |
225 | code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES; | |
226 | code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER; | |
227 | break; | |
228 | case 2: | |
229 | code1 = SSH2_AGENTC_REQUEST_IDENTITIES; | |
230 | code2 = SSH2_AGENT_IDENTITIES_ANSWER; | |
231 | break; | |
232 | default: | |
fa08c86b | 233 | return 0; |
2e73a022 | 234 | } |
5260325f | 235 | |
aa3378df | 236 | /* |
237 | * Send a message to the agent requesting for a list of the | |
238 | * identities it can represent. | |
239 | */ | |
c345cf9d | 240 | buffer_init(&request); |
2e73a022 | 241 | buffer_put_char(&request, code1); |
5260325f | 242 | |
5260325f | 243 | buffer_clear(&auth->identities); |
c345cf9d | 244 | if (ssh_request_reply(auth, &request, &auth->identities) == 0) { |
245 | buffer_free(&request); | |
fa08c86b | 246 | return 0; |
8efc0c15 | 247 | } |
c345cf9d | 248 | buffer_free(&request); |
5260325f | 249 | |
250 | /* Get message type, and verify that we got a proper answer. */ | |
c345cf9d | 251 | type = buffer_get_char(&auth->identities); |
94ec8c6b | 252 | if (agent_failed(type)) { |
fa08c86b | 253 | return 0; |
2e73a022 | 254 | } else if (type != code2) { |
c345cf9d | 255 | fatal("Bad authentication reply message type: %d", type); |
2e73a022 | 256 | } |
5260325f | 257 | |
258 | /* Get the number of entries in the response and check it for sanity. */ | |
259 | auth->howmany = buffer_get_int(&auth->identities); | |
260 | if (auth->howmany > 1024) | |
54b974dc | 261 | fatal("Too many identities in authentication reply: %d", |
c345cf9d | 262 | auth->howmany); |
5260325f | 263 | |
fa08c86b | 264 | return auth->howmany; |
265 | } | |
266 | ||
267 | Key * | |
268 | ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version) | |
269 | { | |
270 | /* get number of identities and return the first entry (if any). */ | |
271 | if (ssh_get_num_identities(auth, version) > 0) | |
272 | return ssh_get_next_identity(auth, comment, version); | |
273 | return NULL; | |
8efc0c15 | 274 | } |
275 | ||
2e73a022 | 276 | Key * |
277 | ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version) | |
8efc0c15 | 278 | { |
1e3b8b07 | 279 | u_int bits; |
280 | u_char *blob; | |
281 | u_int blen; | |
2e73a022 | 282 | Key *key = NULL; |
4d195447 | 283 | |
5260325f | 284 | /* Return failure if no more entries. */ |
285 | if (auth->howmany <= 0) | |
2e73a022 | 286 | return NULL; |
8efc0c15 | 287 | |
aa3378df | 288 | /* |
289 | * Get the next entry from the packet. These will abort with a fatal | |
290 | * error if the packet is too short or contains corrupt data. | |
291 | */ | |
2e73a022 | 292 | switch(version){ |
293 | case 1: | |
fa08c86b | 294 | key = key_new(KEY_RSA1); |
2e73a022 | 295 | bits = buffer_get_int(&auth->identities); |
296 | buffer_get_bignum(&auth->identities, key->rsa->e); | |
297 | buffer_get_bignum(&auth->identities, key->rsa->n); | |
298 | *comment = buffer_get_string(&auth->identities, NULL); | |
299 | if (bits != BN_num_bits(key->rsa->n)) | |
300 | log("Warning: identity keysize mismatch: actual %d, announced %u", | |
301 | BN_num_bits(key->rsa->n), bits); | |
302 | break; | |
303 | case 2: | |
304 | blob = buffer_get_string(&auth->identities, &blen); | |
305 | *comment = buffer_get_string(&auth->identities, NULL); | |
fa08c86b | 306 | key = key_from_blob(blob, blen); |
2e73a022 | 307 | xfree(blob); |
308 | break; | |
309 | default: | |
310 | return NULL; | |
311 | break; | |
312 | } | |
5260325f | 313 | /* Decrement the number of remaining entries. */ |
314 | auth->howmany--; | |
2e73a022 | 315 | return key; |
8efc0c15 | 316 | } |
317 | ||
aa3378df | 318 | /* |
319 | * Generates a random challenge, sends it to the agent, and waits for | |
320 | * response from the agent. Returns true (non-zero) if the agent gave the | |
321 | * correct answer, zero otherwise. Response type selects the style of | |
322 | * response desired, with 0 corresponding to protocol version 1.0 (no longer | |
323 | * supported) and 1 corresponding to protocol version 1.1. | |
324 | */ | |
8efc0c15 | 325 | |
326 | int | |
327 | ssh_decrypt_challenge(AuthenticationConnection *auth, | |
2e73a022 | 328 | Key* key, BIGNUM *challenge, |
1e3b8b07 | 329 | u_char session_id[16], |
330 | u_int response_type, | |
331 | u_char response[16]) | |
8efc0c15 | 332 | { |
5260325f | 333 | Buffer buffer; |
c345cf9d | 334 | int success = 0; |
335 | int i; | |
336 | int type; | |
5260325f | 337 | |
fa08c86b | 338 | if (key->type != KEY_RSA1) |
2e73a022 | 339 | return 0; |
340 | if (response_type == 0) { | |
341 | log("Compatibility with ssh protocol version 1.0 no longer supported."); | |
342 | return 0; | |
343 | } | |
5260325f | 344 | buffer_init(&buffer); |
c345cf9d | 345 | buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE); |
2e73a022 | 346 | buffer_put_int(&buffer, BN_num_bits(key->rsa->n)); |
347 | buffer_put_bignum(&buffer, key->rsa->e); | |
348 | buffer_put_bignum(&buffer, key->rsa->n); | |
5260325f | 349 | buffer_put_bignum(&buffer, challenge); |
350 | buffer_append(&buffer, (char *) session_id, 16); | |
351 | buffer_put_int(&buffer, response_type); | |
352 | ||
c345cf9d | 353 | if (ssh_request_reply(auth, &buffer, &buffer) == 0) { |
5260325f | 354 | buffer_free(&buffer); |
355 | return 0; | |
356 | } | |
c345cf9d | 357 | type = buffer_get_char(&buffer); |
5260325f | 358 | |
94ec8c6b | 359 | if (agent_failed(type)) { |
5260325f | 360 | log("Agent admitted failure to authenticate using the key."); |
c345cf9d | 361 | } else if (type != SSH_AGENT_RSA_RESPONSE) { |
362 | fatal("Bad authentication response: %d", type); | |
363 | } else { | |
364 | success = 1; | |
365 | /* | |
366 | * Get the response from the packet. This will abort with a | |
367 | * fatal error if the packet is corrupt. | |
368 | */ | |
369 | for (i = 0; i < 16; i++) | |
370 | response[i] = buffer_get_char(&buffer); | |
8efc0c15 | 371 | } |
5260325f | 372 | buffer_free(&buffer); |
c345cf9d | 373 | return success; |
5260325f | 374 | } |
8efc0c15 | 375 | |
2e73a022 | 376 | /* ask agent to sign data, returns -1 on error, 0 on success */ |
377 | int | |
378 | ssh_agent_sign(AuthenticationConnection *auth, | |
379 | Key *key, | |
1e3b8b07 | 380 | u_char **sigp, int *lenp, |
381 | u_char *data, int datalen) | |
2e73a022 | 382 | { |
188adeb2 | 383 | extern int datafellows; |
2e73a022 | 384 | Buffer msg; |
1e3b8b07 | 385 | u_char *blob; |
386 | u_int blen; | |
188adeb2 | 387 | int type, flags = 0; |
2e73a022 | 388 | int ret = -1; |
389 | ||
fa08c86b | 390 | if (key_to_blob(key, &blob, &blen) == 0) |
2e73a022 | 391 | return -1; |
392 | ||
188adeb2 | 393 | if (datafellows & SSH_BUG_SIGBLOB) |
394 | flags = SSH_AGENT_OLD_SIGNATURE; | |
395 | ||
2e73a022 | 396 | buffer_init(&msg); |
397 | buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST); | |
398 | buffer_put_string(&msg, blob, blen); | |
399 | buffer_put_string(&msg, data, datalen); | |
188adeb2 | 400 | buffer_put_int(&msg, flags); |
2e73a022 | 401 | xfree(blob); |
402 | ||
403 | if (ssh_request_reply(auth, &msg, &msg) == 0) { | |
404 | buffer_free(&msg); | |
405 | return -1; | |
406 | } | |
407 | type = buffer_get_char(&msg); | |
94ec8c6b | 408 | if (agent_failed(type)) { |
2e73a022 | 409 | log("Agent admitted failure to sign using the key."); |
410 | } else if (type != SSH2_AGENT_SIGN_RESPONSE) { | |
411 | fatal("Bad authentication response: %d", type); | |
412 | } else { | |
413 | ret = 0; | |
414 | *sigp = buffer_get_string(&msg, lenp); | |
415 | } | |
416 | buffer_free(&msg); | |
417 | return ret; | |
418 | } | |
419 | ||
4c8722d9 | 420 | /* Encode key for a message to the agent. */ |
421 | ||
422 | void | |
fa08c86b | 423 | ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment) |
4c8722d9 | 424 | { |
425 | buffer_clear(b); | |
426 | buffer_put_char(b, SSH_AGENTC_ADD_RSA_IDENTITY); | |
427 | buffer_put_int(b, BN_num_bits(key->n)); | |
428 | buffer_put_bignum(b, key->n); | |
429 | buffer_put_bignum(b, key->e); | |
430 | buffer_put_bignum(b, key->d); | |
431 | /* To keep within the protocol: p < q for ssh. in SSL p > q */ | |
432 | buffer_put_bignum(b, key->iqmp); /* ssh key->u */ | |
433 | buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */ | |
434 | buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */ | |
435 | buffer_put_string(b, comment, strlen(comment)); | |
436 | } | |
437 | ||
438 | void | |
fa08c86b | 439 | ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment) |
4c8722d9 | 440 | { |
441 | buffer_clear(b); | |
442 | buffer_put_char(b, SSH2_AGENTC_ADD_IDENTITY); | |
fa08c86b | 443 | buffer_put_cstring(b, key_ssh_name(key)); |
444 | switch(key->type){ | |
445 | case KEY_RSA: | |
446 | buffer_put_bignum2(b, key->rsa->n); | |
447 | buffer_put_bignum2(b, key->rsa->e); | |
448 | buffer_put_bignum2(b, key->rsa->d); | |
449 | buffer_put_bignum2(b, key->rsa->iqmp); | |
450 | buffer_put_bignum2(b, key->rsa->p); | |
451 | buffer_put_bignum2(b, key->rsa->q); | |
452 | break; | |
453 | case KEY_DSA: | |
454 | buffer_put_bignum2(b, key->dsa->p); | |
455 | buffer_put_bignum2(b, key->dsa->q); | |
456 | buffer_put_bignum2(b, key->dsa->g); | |
457 | buffer_put_bignum2(b, key->dsa->pub_key); | |
458 | buffer_put_bignum2(b, key->dsa->priv_key); | |
459 | break; | |
460 | } | |
461 | buffer_put_cstring(b, comment); | |
4c8722d9 | 462 | } |
463 | ||
aa3378df | 464 | /* |
465 | * Adds an identity to the authentication server. This call is not meant to | |
466 | * be used by normal applications. | |
467 | */ | |
8efc0c15 | 468 | |
6ae2364d | 469 | int |
4c8722d9 | 470 | ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment) |
8efc0c15 | 471 | { |
2e73a022 | 472 | Buffer msg; |
c345cf9d | 473 | int type; |
5260325f | 474 | |
2e73a022 | 475 | buffer_init(&msg); |
4c8722d9 | 476 | |
477 | switch (key->type) { | |
fa08c86b | 478 | case KEY_RSA1: |
479 | ssh_encode_identity_rsa1(&msg, key->rsa, comment); | |
4c8722d9 | 480 | break; |
fa08c86b | 481 | case KEY_RSA: |
4c8722d9 | 482 | case KEY_DSA: |
fa08c86b | 483 | ssh_encode_identity_ssh2(&msg, key, comment); |
4c8722d9 | 484 | break; |
485 | default: | |
2e73a022 | 486 | buffer_free(&msg); |
4c8722d9 | 487 | return 0; |
488 | break; | |
489 | } | |
2e73a022 | 490 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
491 | buffer_free(&msg); | |
5260325f | 492 | return 0; |
493 | } | |
2e73a022 | 494 | type = buffer_get_char(&msg); |
495 | buffer_free(&msg); | |
c345cf9d | 496 | return decode_reply(type); |
5260325f | 497 | } |
498 | ||
aa3378df | 499 | /* |
500 | * Removes an identity from the authentication server. This call is not | |
501 | * meant to be used by normal applications. | |
502 | */ | |
8efc0c15 | 503 | |
6ae2364d | 504 | int |
2e73a022 | 505 | ssh_remove_identity(AuthenticationConnection *auth, Key *key) |
8efc0c15 | 506 | { |
2e73a022 | 507 | Buffer msg; |
c345cf9d | 508 | int type; |
1e3b8b07 | 509 | u_char *blob; |
510 | u_int blen; | |
2e73a022 | 511 | |
512 | buffer_init(&msg); | |
513 | ||
fa08c86b | 514 | if (key->type == KEY_RSA1) { |
2e73a022 | 515 | buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY); |
516 | buffer_put_int(&msg, BN_num_bits(key->rsa->n)); | |
517 | buffer_put_bignum(&msg, key->rsa->e); | |
518 | buffer_put_bignum(&msg, key->rsa->n); | |
fa08c86b | 519 | } else if (key->type == KEY_DSA || key->type == KEY_RSA) { |
520 | key_to_blob(key, &blob, &blen); | |
2e73a022 | 521 | buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY); |
522 | buffer_put_string(&msg, blob, blen); | |
523 | xfree(blob); | |
524 | } else { | |
525 | buffer_free(&msg); | |
5260325f | 526 | return 0; |
527 | } | |
2e73a022 | 528 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
529 | buffer_free(&msg); | |
530 | return 0; | |
531 | } | |
532 | type = buffer_get_char(&msg); | |
533 | buffer_free(&msg); | |
c345cf9d | 534 | return decode_reply(type); |
5260325f | 535 | } |
536 | ||
aa3378df | 537 | /* |
538 | * Removes all identities from the agent. This call is not meant to be used | |
539 | * by normal applications. | |
540 | */ | |
8efc0c15 | 541 | |
6ae2364d | 542 | int |
2e73a022 | 543 | ssh_remove_all_identities(AuthenticationConnection *auth, int version) |
8efc0c15 | 544 | { |
2e73a022 | 545 | Buffer msg; |
c345cf9d | 546 | int type; |
2e73a022 | 547 | int code = (version==1) ? |
548 | SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : | |
549 | SSH2_AGENTC_REMOVE_ALL_IDENTITIES; | |
5260325f | 550 | |
2e73a022 | 551 | buffer_init(&msg); |
552 | buffer_put_char(&msg, code); | |
5260325f | 553 | |
2e73a022 | 554 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
555 | buffer_free(&msg); | |
5260325f | 556 | return 0; |
557 | } | |
2e73a022 | 558 | type = buffer_get_char(&msg); |
559 | buffer_free(&msg); | |
c345cf9d | 560 | return decode_reply(type); |
089fbbd2 | 561 | } |
562 | ||
2b87da3b | 563 | int |
c345cf9d | 564 | decode_reply(int type) |
089fbbd2 | 565 | { |
5260325f | 566 | switch (type) { |
567 | case SSH_AGENT_FAILURE: | |
94ec8c6b | 568 | case SSH_COM_AGENT2_FAILURE: |
c345cf9d | 569 | log("SSH_AGENT_FAILURE"); |
5260325f | 570 | return 0; |
571 | case SSH_AGENT_SUCCESS: | |
5260325f | 572 | return 1; |
573 | default: | |
089fbbd2 | 574 | fatal("Bad response from authentication agent: %d", type); |
8efc0c15 | 575 | } |
5260325f | 576 | /* NOTREACHED */ |
577 | return 0; | |
578 | } |