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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" | |
94ec8c6b | 38 | RCSID("$OpenBSD: authfd.c,v 1.29 2000/10/09 21:51:00 markus Exp $"); |
8efc0c15 | 39 | |
40 | #include "ssh.h" | |
41 | #include "rsa.h" | |
8efc0c15 | 42 | #include "buffer.h" |
43 | #include "bufaux.h" | |
44 | #include "xmalloc.h" | |
45 | #include "getput.h" | |
46 | ||
47 | #include <openssl/rsa.h> | |
4c8722d9 | 48 | #include <openssl/dsa.h> |
49 | #include <openssl/evp.h> | |
50 | #include "key.h" | |
51 | #include "authfd.h" | |
52 | #include "kex.h" | |
2e73a022 | 53 | #include "dsa.h" |
188adeb2 | 54 | #include "compat.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 | |
66 | ssh_get_authentication_socket() | |
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 | #ifdef HAVE_SUN_LEN_IN_SOCKADDR_UN |
79 | sunaddr.sun_len = len = SUN_LEN(&sunaddr)+1; | |
80 | #else /* HAVE_SUN_LEN_IN_SOCKADDR_UN */ | |
81 | len = SUN_LEN(&sunaddr)+1; | |
82 | #endif /* HAVE_SUN_LEN_IN_SOCKADDR_UN */ | |
5260325f | 83 | |
84 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
85 | if (sock < 0) | |
86 | return -1; | |
87 | ||
88 | /* close on exec */ | |
89 | if (fcntl(sock, F_SETFD, 1) == -1) { | |
90 | close(sock); | |
91 | return -1; | |
92 | } | |
c345cf9d | 93 | if (connect(sock, (struct sockaddr *) & sunaddr, len) < 0) { |
5260325f | 94 | close(sock); |
95 | return -1; | |
96 | } | |
97 | return sock; | |
8efc0c15 | 98 | } |
99 | ||
c345cf9d | 100 | int |
2e73a022 | 101 | ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply) |
c345cf9d | 102 | { |
103 | int l, len; | |
104 | char buf[1024]; | |
105 | ||
106 | /* Get the length of the message, and format it in the buffer. */ | |
107 | len = buffer_len(request); | |
108 | PUT_32BIT(buf, len); | |
109 | ||
110 | /* Send the length and then the packet to the agent. */ | |
111 | if (atomicio(write, auth->fd, buf, 4) != 4 || | |
112 | atomicio(write, auth->fd, buffer_ptr(request), | |
113 | buffer_len(request)) != buffer_len(request)) { | |
114 | error("Error writing to authentication socket."); | |
115 | return 0; | |
116 | } | |
117 | /* | |
118 | * Wait for response from the agent. First read the length of the | |
119 | * response packet. | |
120 | */ | |
121 | len = 4; | |
122 | while (len > 0) { | |
123 | l = read(auth->fd, buf + 4 - len, len); | |
124 | if (l <= 0) { | |
125 | error("Error reading response length from authentication socket."); | |
126 | return 0; | |
127 | } | |
128 | len -= l; | |
129 | } | |
130 | ||
131 | /* Extract the length, and check it for sanity. */ | |
132 | len = GET_32BIT(buf); | |
133 | if (len > 256 * 1024) | |
134 | fatal("Authentication response too long: %d", len); | |
135 | ||
136 | /* Read the rest of the response in to the buffer. */ | |
137 | buffer_clear(reply); | |
138 | while (len > 0) { | |
139 | l = len; | |
140 | if (l > sizeof(buf)) | |
141 | l = sizeof(buf); | |
142 | l = read(auth->fd, buf, l); | |
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 * |
175 | ssh_get_authentication_connection() | |
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 | ||
aa3378df | 210 | /* |
211 | * Returns the first authentication identity held by the agent. | |
aa3378df | 212 | */ |
8efc0c15 | 213 | |
2e73a022 | 214 | Key * |
215 | ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version) | |
8efc0c15 | 216 | { |
2e73a022 | 217 | int type, code1 = 0, code2 = 0; |
c345cf9d | 218 | Buffer request; |
2e73a022 | 219 | |
220 | switch(version){ | |
221 | case 1: | |
222 | code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES; | |
223 | code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER; | |
224 | break; | |
225 | case 2: | |
226 | code1 = SSH2_AGENTC_REQUEST_IDENTITIES; | |
227 | code2 = SSH2_AGENT_IDENTITIES_ANSWER; | |
228 | break; | |
229 | default: | |
230 | return NULL; | |
231 | } | |
5260325f | 232 | |
aa3378df | 233 | /* |
234 | * Send a message to the agent requesting for a list of the | |
235 | * identities it can represent. | |
236 | */ | |
c345cf9d | 237 | buffer_init(&request); |
2e73a022 | 238 | buffer_put_char(&request, code1); |
5260325f | 239 | |
5260325f | 240 | buffer_clear(&auth->identities); |
c345cf9d | 241 | if (ssh_request_reply(auth, &request, &auth->identities) == 0) { |
242 | buffer_free(&request); | |
2e73a022 | 243 | return NULL; |
8efc0c15 | 244 | } |
c345cf9d | 245 | buffer_free(&request); |
5260325f | 246 | |
247 | /* Get message type, and verify that we got a proper answer. */ | |
c345cf9d | 248 | type = buffer_get_char(&auth->identities); |
94ec8c6b | 249 | if (agent_failed(type)) { |
2e73a022 | 250 | return NULL; |
251 | } else if (type != code2) { | |
c345cf9d | 252 | fatal("Bad authentication reply message type: %d", type); |
2e73a022 | 253 | } |
5260325f | 254 | |
255 | /* Get the number of entries in the response and check it for sanity. */ | |
256 | auth->howmany = buffer_get_int(&auth->identities); | |
257 | if (auth->howmany > 1024) | |
c345cf9d | 258 | fatal("Too many identities in authentication reply: %d\n", |
259 | auth->howmany); | |
5260325f | 260 | |
261 | /* Return the first entry (if any). */ | |
2e73a022 | 262 | return ssh_get_next_identity(auth, comment, version); |
8efc0c15 | 263 | } |
264 | ||
2e73a022 | 265 | Key * |
266 | ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version) | |
8efc0c15 | 267 | { |
5260325f | 268 | unsigned int bits; |
2e73a022 | 269 | unsigned char *blob; |
270 | unsigned int blen; | |
271 | Key *key = NULL; | |
4d195447 | 272 | |
5260325f | 273 | /* Return failure if no more entries. */ |
274 | if (auth->howmany <= 0) | |
2e73a022 | 275 | return NULL; |
8efc0c15 | 276 | |
aa3378df | 277 | /* |
278 | * Get the next entry from the packet. These will abort with a fatal | |
279 | * error if the packet is too short or contains corrupt data. | |
280 | */ | |
2e73a022 | 281 | switch(version){ |
282 | case 1: | |
283 | key = key_new(KEY_RSA); | |
284 | bits = buffer_get_int(&auth->identities); | |
285 | buffer_get_bignum(&auth->identities, key->rsa->e); | |
286 | buffer_get_bignum(&auth->identities, key->rsa->n); | |
287 | *comment = buffer_get_string(&auth->identities, NULL); | |
288 | if (bits != BN_num_bits(key->rsa->n)) | |
289 | log("Warning: identity keysize mismatch: actual %d, announced %u", | |
290 | BN_num_bits(key->rsa->n), bits); | |
291 | break; | |
292 | case 2: | |
293 | blob = buffer_get_string(&auth->identities, &blen); | |
294 | *comment = buffer_get_string(&auth->identities, NULL); | |
295 | key = dsa_key_from_blob(blob, blen); | |
296 | xfree(blob); | |
297 | break; | |
298 | default: | |
299 | return NULL; | |
300 | break; | |
301 | } | |
5260325f | 302 | /* Decrement the number of remaining entries. */ |
303 | auth->howmany--; | |
2e73a022 | 304 | return key; |
8efc0c15 | 305 | } |
306 | ||
aa3378df | 307 | /* |
308 | * Generates a random challenge, sends it to the agent, and waits for | |
309 | * response from the agent. Returns true (non-zero) if the agent gave the | |
310 | * correct answer, zero otherwise. Response type selects the style of | |
311 | * response desired, with 0 corresponding to protocol version 1.0 (no longer | |
312 | * supported) and 1 corresponding to protocol version 1.1. | |
313 | */ | |
8efc0c15 | 314 | |
315 | int | |
316 | ssh_decrypt_challenge(AuthenticationConnection *auth, | |
2e73a022 | 317 | Key* key, BIGNUM *challenge, |
c345cf9d | 318 | unsigned char session_id[16], |
319 | unsigned int response_type, | |
320 | unsigned char response[16]) | |
8efc0c15 | 321 | { |
5260325f | 322 | Buffer buffer; |
c345cf9d | 323 | int success = 0; |
324 | int i; | |
325 | int type; | |
5260325f | 326 | |
2e73a022 | 327 | if (key->type != KEY_RSA) |
328 | return 0; | |
329 | if (response_type == 0) { | |
330 | log("Compatibility with ssh protocol version 1.0 no longer supported."); | |
331 | return 0; | |
332 | } | |
5260325f | 333 | buffer_init(&buffer); |
c345cf9d | 334 | buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE); |
2e73a022 | 335 | buffer_put_int(&buffer, BN_num_bits(key->rsa->n)); |
336 | buffer_put_bignum(&buffer, key->rsa->e); | |
337 | buffer_put_bignum(&buffer, key->rsa->n); | |
5260325f | 338 | buffer_put_bignum(&buffer, challenge); |
339 | buffer_append(&buffer, (char *) session_id, 16); | |
340 | buffer_put_int(&buffer, response_type); | |
341 | ||
c345cf9d | 342 | if (ssh_request_reply(auth, &buffer, &buffer) == 0) { |
5260325f | 343 | buffer_free(&buffer); |
344 | return 0; | |
345 | } | |
c345cf9d | 346 | type = buffer_get_char(&buffer); |
5260325f | 347 | |
94ec8c6b | 348 | if (agent_failed(type)) { |
5260325f | 349 | log("Agent admitted failure to authenticate using the key."); |
c345cf9d | 350 | } else if (type != SSH_AGENT_RSA_RESPONSE) { |
351 | fatal("Bad authentication response: %d", type); | |
352 | } else { | |
353 | success = 1; | |
354 | /* | |
355 | * Get the response from the packet. This will abort with a | |
356 | * fatal error if the packet is corrupt. | |
357 | */ | |
358 | for (i = 0; i < 16; i++) | |
359 | response[i] = buffer_get_char(&buffer); | |
8efc0c15 | 360 | } |
5260325f | 361 | buffer_free(&buffer); |
c345cf9d | 362 | return success; |
5260325f | 363 | } |
8efc0c15 | 364 | |
2e73a022 | 365 | /* ask agent to sign data, returns -1 on error, 0 on success */ |
366 | int | |
367 | ssh_agent_sign(AuthenticationConnection *auth, | |
368 | Key *key, | |
369 | unsigned char **sigp, int *lenp, | |
370 | unsigned char *data, int datalen) | |
371 | { | |
188adeb2 | 372 | extern int datafellows; |
2e73a022 | 373 | Buffer msg; |
374 | unsigned char *blob; | |
375 | unsigned int blen; | |
188adeb2 | 376 | int type, flags = 0; |
2e73a022 | 377 | int ret = -1; |
378 | ||
379 | if (dsa_make_key_blob(key, &blob, &blen) == 0) | |
380 | return -1; | |
381 | ||
188adeb2 | 382 | if (datafellows & SSH_BUG_SIGBLOB) |
383 | flags = SSH_AGENT_OLD_SIGNATURE; | |
384 | ||
2e73a022 | 385 | buffer_init(&msg); |
386 | buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST); | |
387 | buffer_put_string(&msg, blob, blen); | |
388 | buffer_put_string(&msg, data, datalen); | |
188adeb2 | 389 | buffer_put_int(&msg, flags); |
2e73a022 | 390 | xfree(blob); |
391 | ||
392 | if (ssh_request_reply(auth, &msg, &msg) == 0) { | |
393 | buffer_free(&msg); | |
394 | return -1; | |
395 | } | |
396 | type = buffer_get_char(&msg); | |
94ec8c6b | 397 | if (agent_failed(type)) { |
2e73a022 | 398 | log("Agent admitted failure to sign using the key."); |
399 | } else if (type != SSH2_AGENT_SIGN_RESPONSE) { | |
400 | fatal("Bad authentication response: %d", type); | |
401 | } else { | |
402 | ret = 0; | |
403 | *sigp = buffer_get_string(&msg, lenp); | |
404 | } | |
405 | buffer_free(&msg); | |
406 | return ret; | |
407 | } | |
408 | ||
4c8722d9 | 409 | /* Encode key for a message to the agent. */ |
410 | ||
411 | void | |
412 | ssh_encode_identity_rsa(Buffer *b, RSA *key, const char *comment) | |
413 | { | |
414 | buffer_clear(b); | |
415 | buffer_put_char(b, SSH_AGENTC_ADD_RSA_IDENTITY); | |
416 | buffer_put_int(b, BN_num_bits(key->n)); | |
417 | buffer_put_bignum(b, key->n); | |
418 | buffer_put_bignum(b, key->e); | |
419 | buffer_put_bignum(b, key->d); | |
420 | /* To keep within the protocol: p < q for ssh. in SSL p > q */ | |
421 | buffer_put_bignum(b, key->iqmp); /* ssh key->u */ | |
422 | buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */ | |
423 | buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */ | |
424 | buffer_put_string(b, comment, strlen(comment)); | |
425 | } | |
426 | ||
427 | void | |
428 | ssh_encode_identity_dsa(Buffer *b, DSA *key, const char *comment) | |
429 | { | |
430 | buffer_clear(b); | |
431 | buffer_put_char(b, SSH2_AGENTC_ADD_IDENTITY); | |
432 | buffer_put_cstring(b, KEX_DSS); | |
433 | buffer_put_bignum2(b, key->p); | |
434 | buffer_put_bignum2(b, key->q); | |
435 | buffer_put_bignum2(b, key->g); | |
436 | buffer_put_bignum2(b, key->pub_key); | |
437 | buffer_put_bignum2(b, key->priv_key); | |
438 | buffer_put_string(b, comment, strlen(comment)); | |
439 | } | |
440 | ||
aa3378df | 441 | /* |
442 | * Adds an identity to the authentication server. This call is not meant to | |
443 | * be used by normal applications. | |
444 | */ | |
8efc0c15 | 445 | |
6ae2364d | 446 | int |
4c8722d9 | 447 | ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment) |
8efc0c15 | 448 | { |
2e73a022 | 449 | Buffer msg; |
c345cf9d | 450 | int type; |
5260325f | 451 | |
2e73a022 | 452 | buffer_init(&msg); |
4c8722d9 | 453 | |
454 | switch (key->type) { | |
455 | case KEY_RSA: | |
2e73a022 | 456 | ssh_encode_identity_rsa(&msg, key->rsa, comment); |
4c8722d9 | 457 | break; |
458 | case KEY_DSA: | |
2e73a022 | 459 | ssh_encode_identity_dsa(&msg, key->dsa, comment); |
4c8722d9 | 460 | break; |
461 | default: | |
2e73a022 | 462 | buffer_free(&msg); |
4c8722d9 | 463 | return 0; |
464 | break; | |
465 | } | |
2e73a022 | 466 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
467 | buffer_free(&msg); | |
5260325f | 468 | return 0; |
469 | } | |
2e73a022 | 470 | type = buffer_get_char(&msg); |
471 | buffer_free(&msg); | |
c345cf9d | 472 | return decode_reply(type); |
5260325f | 473 | } |
474 | ||
aa3378df | 475 | /* |
476 | * Removes an identity from the authentication server. This call is not | |
477 | * meant to be used by normal applications. | |
478 | */ | |
8efc0c15 | 479 | |
6ae2364d | 480 | int |
2e73a022 | 481 | ssh_remove_identity(AuthenticationConnection *auth, Key *key) |
8efc0c15 | 482 | { |
2e73a022 | 483 | Buffer msg; |
c345cf9d | 484 | int type; |
2e73a022 | 485 | unsigned char *blob; |
486 | unsigned int blen; | |
487 | ||
488 | buffer_init(&msg); | |
489 | ||
490 | if (key->type == KEY_RSA) { | |
491 | buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY); | |
492 | buffer_put_int(&msg, BN_num_bits(key->rsa->n)); | |
493 | buffer_put_bignum(&msg, key->rsa->e); | |
494 | buffer_put_bignum(&msg, key->rsa->n); | |
495 | } else if (key->type == KEY_DSA) { | |
496 | dsa_make_key_blob(key, &blob, &blen); | |
497 | buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY); | |
498 | buffer_put_string(&msg, blob, blen); | |
499 | xfree(blob); | |
500 | } else { | |
501 | buffer_free(&msg); | |
5260325f | 502 | return 0; |
503 | } | |
2e73a022 | 504 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
505 | buffer_free(&msg); | |
506 | return 0; | |
507 | } | |
508 | type = buffer_get_char(&msg); | |
509 | buffer_free(&msg); | |
c345cf9d | 510 | return decode_reply(type); |
5260325f | 511 | } |
512 | ||
aa3378df | 513 | /* |
514 | * Removes all identities from the agent. This call is not meant to be used | |
515 | * by normal applications. | |
516 | */ | |
8efc0c15 | 517 | |
6ae2364d | 518 | int |
2e73a022 | 519 | ssh_remove_all_identities(AuthenticationConnection *auth, int version) |
8efc0c15 | 520 | { |
2e73a022 | 521 | Buffer msg; |
c345cf9d | 522 | int type; |
2e73a022 | 523 | int code = (version==1) ? |
524 | SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : | |
525 | SSH2_AGENTC_REMOVE_ALL_IDENTITIES; | |
5260325f | 526 | |
2e73a022 | 527 | buffer_init(&msg); |
528 | buffer_put_char(&msg, code); | |
5260325f | 529 | |
2e73a022 | 530 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
531 | buffer_free(&msg); | |
5260325f | 532 | return 0; |
533 | } | |
2e73a022 | 534 | type = buffer_get_char(&msg); |
535 | buffer_free(&msg); | |
c345cf9d | 536 | return decode_reply(type); |
089fbbd2 | 537 | } |
538 | ||
089fbbd2 | 539 | int |
c345cf9d | 540 | decode_reply(int type) |
089fbbd2 | 541 | { |
5260325f | 542 | switch (type) { |
543 | case SSH_AGENT_FAILURE: | |
94ec8c6b | 544 | case SSH_COM_AGENT2_FAILURE: |
c345cf9d | 545 | log("SSH_AGENT_FAILURE"); |
5260325f | 546 | return 0; |
547 | case SSH_AGENT_SUCCESS: | |
5260325f | 548 | return 1; |
549 | default: | |
089fbbd2 | 550 | fatal("Bad response from authentication agent: %d", type); |
8efc0c15 | 551 | } |
5260325f | 552 | /* NOTREACHED */ |
553 | return 0; | |
554 | } |