Annotation of src/usr.bin/ssh/authfd.c, Revision 1.101
1.101 ! djm 1: /* $OpenBSD: authfd.c,v 1.100 2015/12/04 16:41:28 markus Exp $ */
1.1 deraadt 2: /*
1.13 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
1.27 deraadt 6: * Functions for connecting the local authentication agent.
1.18 markus 7: *
1.27 deraadt 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".
1.18 markus 13: *
1.25 markus 14: * SSH2 implementation,
1.27 deraadt 15: * Copyright (c) 2000 Markus Friedl. All rights reserved.
1.25 markus 16: *
1.27 deraadt 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.
25: *
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.
1.13 deraadt 36: */
1.1 deraadt 37:
1.67 stevesk 38:
39: #include <sys/types.h>
40: #include <sys/un.h>
1.75 stevesk 41: #include <sys/socket.h>
1.33 markus 42:
1.76 stevesk 43: #include <fcntl.h>
1.79 stevesk 44: #include <stdlib.h>
1.80 deraadt 45: #include <signal.h>
1.78 stevesk 46: #include <string.h>
1.77 stevesk 47: #include <unistd.h>
1.94 djm 48: #include <errno.h>
1.1 deraadt 49:
1.80 deraadt 50: #include "xmalloc.h"
1.1 deraadt 51: #include "ssh.h"
52: #include "rsa.h"
1.94 djm 53: #include "sshbuf.h"
54: #include "sshkey.h"
1.22 markus 55: #include "authfd.h"
1.33 markus 56: #include "cipher.h"
1.28 markus 57: #include "compat.h"
1.33 markus 58: #include "log.h"
59: #include "atomicio.h"
1.74 djm 60: #include "misc.h"
1.94 djm 61: #include "ssherr.h"
1.2 provos 62:
1.94 djm 63: #define MAX_AGENT_IDENTITIES 2048 /* Max keys in agent reply */
64: #define MAX_AGENT_REPLY_LEN (256 * 1024) /* Max bytes in agent reply */
1.21 markus 65:
1.29 markus 66: /* macro to check for "agent failure" message */
67: #define agent_failed(x) \
1.94 djm 68: ((x == SSH_AGENT_FAILURE) || \
69: (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 70: (x == SSH2_AGENT_FAILURE))
1.29 markus 71:
1.94 djm 72: /* Convert success/failure response from agent to a err.h status */
73: static int
74: decode_reply(u_char type)
1.57 stevesk 75: {
1.94 djm 76: if (agent_failed(type))
77: return SSH_ERR_AGENT_FAILURE;
78: else if (type == SSH_AGENT_SUCCESS)
1.57 stevesk 79: return 0;
1.94 djm 80: else
81: return SSH_ERR_INVALID_FORMAT;
1.57 stevesk 82: }
83:
1.1 deraadt 84: /* Returns the number of the authentication fd, or -1 if there is none. */
1.2 provos 85: int
1.94 djm 86: ssh_get_authentication_socket(int *fdp)
1.1 deraadt 87: {
1.12 markus 88: const char *authsocket;
1.94 djm 89: int sock, oerrno;
1.12 markus 90: struct sockaddr_un sunaddr;
91:
1.94 djm 92: if (fdp != NULL)
93: *fdp = -1;
94:
1.12 markus 95: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
96: if (!authsocket)
1.94 djm 97: return SSH_ERR_AGENT_NOT_PRESENT;
1.12 markus 98:
1.92 tedu 99: memset(&sunaddr, 0, sizeof(sunaddr));
1.12 markus 100: sunaddr.sun_family = AF_UNIX;
101: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
102:
1.94 djm 103: if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
104: return SSH_ERR_SYSTEM_ERROR;
1.12 markus 105:
106: /* close on exec */
1.94 djm 107: if (fcntl(sock, F_SETFD, FD_CLOEXEC) == -1 ||
108: connect(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0) {
109: oerrno = errno;
1.12 markus 110: close(sock);
1.94 djm 111: errno = oerrno;
112: return SSH_ERR_SYSTEM_ERROR;
1.12 markus 113: }
1.94 djm 114: if (fdp != NULL)
115: *fdp = sock;
116: else
1.12 markus 117: close(sock);
1.94 djm 118: return 0;
1.1 deraadt 119: }
120:
1.94 djm 121: /* Communicate with agent: send request and read reply */
1.41 itojun 122: static int
1.94 djm 123: ssh_request_reply(int sock, struct sshbuf *request, struct sshbuf *reply)
1.24 markus 124: {
1.94 djm 125: int r;
126: size_t l, len;
1.24 markus 127: char buf[1024];
128:
129: /* Get the length of the message, and format it in the buffer. */
1.94 djm 130: len = sshbuf_len(request);
1.74 djm 131: put_u32(buf, len);
1.24 markus 132:
133: /* Send the length and then the packet to the agent. */
1.94 djm 134: if (atomicio(vwrite, sock, buf, 4) != 4 ||
135: atomicio(vwrite, sock, (u_char *)sshbuf_ptr(request),
136: sshbuf_len(request)) != sshbuf_len(request))
137: return SSH_ERR_AGENT_COMMUNICATION;
1.24 markus 138: /*
139: * Wait for response from the agent. First read the length of the
140: * response packet.
141: */
1.94 djm 142: if (atomicio(read, sock, buf, 4) != 4)
143: return SSH_ERR_AGENT_COMMUNICATION;
1.24 markus 144:
145: /* Extract the length, and check it for sanity. */
1.74 djm 146: len = get_u32(buf);
1.94 djm 147: if (len > MAX_AGENT_REPLY_LEN)
148: return SSH_ERR_INVALID_FORMAT;
1.24 markus 149:
150: /* Read the rest of the response in to the buffer. */
1.94 djm 151: sshbuf_reset(reply);
1.24 markus 152: while (len > 0) {
153: l = len;
154: if (l > sizeof(buf))
155: l = sizeof(buf);
1.94 djm 156: if (atomicio(read, sock, buf, l) != l)
157: return SSH_ERR_AGENT_COMMUNICATION;
158: if ((r = sshbuf_put(reply, buf, l)) != 0)
159: return r;
1.24 markus 160: len -= l;
161: }
1.94 djm 162: return 0;
1.24 markus 163: }
164:
1.14 markus 165: /*
166: * Closes the agent socket if it should be closed (depends on how it was
167: * obtained). The argument must have been returned by
168: * ssh_get_authentication_socket().
169: */
1.18 markus 170: void
1.12 markus 171: ssh_close_authentication_socket(int sock)
1.1 deraadt 172: {
1.12 markus 173: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
174: close(sock);
1.1 deraadt 175: }
176:
1.94 djm 177: /* Lock/unlock agent */
178: int
179: ssh_lock_agent(int sock, int lock, const char *password)
1.1 deraadt 180: {
1.94 djm 181: int r;
182: u_char type = lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK;
183: struct sshbuf *msg;
184:
185: if ((msg = sshbuf_new()) == NULL)
186: return SSH_ERR_ALLOC_FAIL;
187: if ((r = sshbuf_put_u8(msg, type)) != 0 ||
188: (r = sshbuf_put_cstring(msg, password)) != 0)
189: goto out;
190: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
191: goto out;
192: if ((r = sshbuf_get_u8(msg, &type)) != 0)
193: goto out;
194: r = decode_reply(type);
195: out:
196: sshbuf_free(msg);
197: return r;
1.1 deraadt 198: }
199:
1.50 markus 200:
1.94 djm 201: static int
202: deserialise_identity2(struct sshbuf *ids, struct sshkey **keyp, char **commentp)
1.50 markus 203: {
1.94 djm 204: int r;
205: char *comment = NULL;
206: const u_char *blob;
207: size_t blen;
208:
209: if ((r = sshbuf_get_string_direct(ids, &blob, &blen)) != 0 ||
210: (r = sshbuf_get_cstring(ids, &comment, NULL)) != 0)
211: goto out;
212: if ((r = sshkey_from_blob(blob, blen, keyp)) != 0)
213: goto out;
214: if (commentp != NULL) {
215: *commentp = comment;
216: comment = NULL;
217: }
218: r = 0;
219: out:
220: free(comment);
221: return r;
1.1 deraadt 222: }
223:
1.14 markus 224: /*
1.94 djm 225: * Fetch list of identities held by the agent.
1.14 markus 226: */
1.30 markus 227: int
1.94 djm 228: ssh_fetch_identitylist(int sock, int version, struct ssh_identitylist **idlp)
1.1 deraadt 229: {
1.94 djm 230: u_char type, code1 = 0, code2 = 0;
231: u_int32_t num, i;
232: struct sshbuf *msg;
233: struct ssh_identitylist *idl = NULL;
234: int r;
1.25 markus 235:
1.94 djm 236: /* Determine request and expected response types */
1.46 deraadt 237: switch (version) {
1.25 markus 238: case 1:
239: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
240: code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER;
241: break;
242: case 2:
243: code1 = SSH2_AGENTC_REQUEST_IDENTITIES;
244: code2 = SSH2_AGENT_IDENTITIES_ANSWER;
245: break;
246: default:
1.94 djm 247: return SSH_ERR_INVALID_ARGUMENT;
1.25 markus 248: }
1.1 deraadt 249:
1.14 markus 250: /*
251: * Send a message to the agent requesting for a list of the
252: * identities it can represent.
253: */
1.94 djm 254: if ((msg = sshbuf_new()) == NULL)
255: return SSH_ERR_ALLOC_FAIL;
256: if ((r = sshbuf_put_u8(msg, code1)) != 0)
257: goto out;
1.12 markus 258:
1.94 djm 259: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
260: goto out;
1.1 deraadt 261:
1.12 markus 262: /* Get message type, and verify that we got a proper answer. */
1.94 djm 263: if ((r = sshbuf_get_u8(msg, &type)) != 0)
264: goto out;
1.29 markus 265: if (agent_failed(type)) {
1.94 djm 266: r = SSH_ERR_AGENT_FAILURE;
267: goto out;
1.25 markus 268: } else if (type != code2) {
1.94 djm 269: r = SSH_ERR_INVALID_FORMAT;
270: goto out;
1.25 markus 271: }
1.12 markus 272:
273: /* Get the number of entries in the response and check it for sanity. */
1.94 djm 274: if ((r = sshbuf_get_u32(msg, &num)) != 0)
275: goto out;
276: if (num > MAX_AGENT_IDENTITIES) {
277: r = SSH_ERR_INVALID_FORMAT;
278: goto out;
279: }
280: if (num == 0) {
281: r = SSH_ERR_AGENT_NO_IDENTITIES;
282: goto out;
283: }
284:
285: /* Deserialise the response into a list of keys/comments */
286: if ((idl = calloc(1, sizeof(*idl))) == NULL ||
287: (idl->keys = calloc(num, sizeof(*idl->keys))) == NULL ||
288: (idl->comments = calloc(num, sizeof(*idl->comments))) == NULL) {
289: r = SSH_ERR_ALLOC_FAIL;
290: goto out;
291: }
292: for (i = 0; i < num;) {
293: switch (version) {
294: case 1:
295: break;
296: case 2:
297: if ((r = deserialise_identity2(msg,
298: &(idl->keys[i]), &(idl->comments[i]))) != 0) {
299: if (r == SSH_ERR_KEY_TYPE_UNKNOWN) {
300: /* Gracefully skip unknown key types */
301: num--;
302: continue;
303: } else
304: goto out;
305: }
306: break;
307: }
308: i++;
309: }
310: idl->nkeys = num;
311: *idlp = idl;
312: idl = NULL;
313: r = 0;
314: out:
315: sshbuf_free(msg);
316: if (idl != NULL)
317: ssh_free_identitylist(idl);
318: return r;
1.30 markus 319: }
320:
1.94 djm 321: void
322: ssh_free_identitylist(struct ssh_identitylist *idl)
1.30 markus 323: {
1.94 djm 324: size_t i;
1.1 deraadt 325:
1.94 djm 326: if (idl == NULL)
327: return;
328: for (i = 0; i < idl->nkeys; i++) {
329: if (idl->keys != NULL)
330: sshkey_free(idl->keys[i]);
331: if (idl->comments != NULL)
332: free(idl->comments[i]);
1.25 markus 333: }
1.94 djm 334: free(idl);
1.1 deraadt 335: }
336:
1.14 markus 337: /*
1.94 djm 338: * Sends a challenge (typically from a server via ssh(1)) to the agent,
339: * and waits for a response from the agent.
340: * Returns true (non-zero) if the agent gave the correct answer, zero
341: * otherwise.
1.14 markus 342: */
1.1 deraadt 343:
344:
1.100 markus 345: /* encode signature algoritm in flag bits, so we can keep the msg format */
346: static u_int
347: agent_encode_alg(struct sshkey *key, const char *alg)
348: {
349: if (alg != NULL && key->type == KEY_RSA) {
350: if (strcmp(alg, "rsa-sha2-256") == 0)
351: return SSH_AGENT_RSA_SHA2_256;
352: else if (strcmp(alg, "rsa-sha2-512") == 0)
353: return SSH_AGENT_RSA_SHA2_512;
354: }
355: return 0;
356: }
357:
1.94 djm 358: /* ask agent to sign data, returns err.h code on error, 0 on success */
1.25 markus 359: int
1.94 djm 360: ssh_agent_sign(int sock, struct sshkey *key,
361: u_char **sigp, size_t *lenp,
1.100 markus 362: const u_char *data, size_t datalen, const char *alg, u_int compat)
1.94 djm 363: {
364: struct sshbuf *msg;
365: u_char *blob = NULL, type;
366: size_t blen = 0, len = 0;
367: u_int flags = 0;
368: int r = SSH_ERR_INTERNAL_ERROR;
369:
1.97 markus 370: *sigp = NULL;
371: *lenp = 0;
1.94 djm 372:
373: if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE)
374: return SSH_ERR_INVALID_ARGUMENT;
375: if (compat & SSH_BUG_SIGBLOB)
376: flags |= SSH_AGENT_OLD_SIGNATURE;
377: if ((msg = sshbuf_new()) == NULL)
378: return SSH_ERR_ALLOC_FAIL;
379: if ((r = sshkey_to_blob(key, &blob, &blen)) != 0)
380: goto out;
1.100 markus 381: flags |= agent_encode_alg(key, alg);
1.94 djm 382: if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 ||
383: (r = sshbuf_put_string(msg, blob, blen)) != 0 ||
384: (r = sshbuf_put_string(msg, data, datalen)) != 0 ||
385: (r = sshbuf_put_u32(msg, flags)) != 0)
386: goto out;
1.99 jsg 387: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
1.94 djm 388: goto out;
389: if ((r = sshbuf_get_u8(msg, &type)) != 0)
390: goto out;
1.29 markus 391: if (agent_failed(type)) {
1.94 djm 392: r = SSH_ERR_AGENT_FAILURE;
393: goto out;
1.25 markus 394: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
1.94 djm 395: r = SSH_ERR_INVALID_FORMAT;
396: goto out;
397: }
398: if ((r = sshbuf_get_string(msg, sigp, &len)) != 0)
399: goto out;
1.97 markus 400: *lenp = len;
1.94 djm 401: r = 0;
402: out:
403: if (blob != NULL) {
404: explicit_bzero(blob, blen);
405: free(blob);
1.25 markus 406: }
1.94 djm 407: sshbuf_free(msg);
408: return r;
1.25 markus 409: }
410:
1.22 markus 411: /* Encode key for a message to the agent. */
412:
413:
1.94 djm 414: static int
415: ssh_encode_identity_ssh2(struct sshbuf *b, struct sshkey *key,
416: const char *comment)
1.22 markus 417: {
1.94 djm 418: int r;
419:
420: if ((r = sshkey_private_serialize(key, b)) != 0 ||
421: (r = sshbuf_put_cstring(b, comment)) != 0)
422: return r;
423: return 0;
424: }
425:
426: static int
427: encode_constraints(struct sshbuf *m, u_int life, u_int confirm)
428: {
429: int r;
430:
431: if (life != 0) {
432: if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_LIFETIME)) != 0 ||
433: (r = sshbuf_put_u32(m, life)) != 0)
434: goto out;
435: }
436: if (confirm != 0) {
437: if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_CONFIRM)) != 0)
438: goto out;
439: }
440: r = 0;
441: out:
442: return r;
1.22 markus 443: }
444:
1.14 markus 445: /*
1.94 djm 446: * Adds an identity to the authentication server.
447: * This call is intended only for use by ssh-add(1) and like applications.
1.14 markus 448: */
1.18 markus 449: int
1.94 djm 450: ssh_add_identity_constrained(int sock, struct sshkey *key, const char *comment,
451: u_int life, u_int confirm)
1.1 deraadt 452: {
1.94 djm 453: struct sshbuf *msg;
454: int r, constrained = (life || confirm);
455: u_char type;
1.12 markus 456:
1.94 djm 457: if ((msg = sshbuf_new()) == NULL)
458: return SSH_ERR_ALLOC_FAIL;
1.22 markus 459:
460: switch (key->type) {
1.93 markus 461: #ifdef WITH_OPENSSL
1.22 markus 462: case KEY_RSA:
1.82 djm 463: case KEY_RSA_CERT:
1.22 markus 464: case KEY_DSA:
1.82 djm 465: case KEY_DSA_CERT:
1.84 djm 466: case KEY_ECDSA:
467: case KEY_ECDSA_CERT:
1.93 markus 468: #endif
1.90 markus 469: case KEY_ED25519:
470: case KEY_ED25519_CERT:
1.54 markus 471: type = constrained ?
472: SSH2_AGENTC_ADD_ID_CONSTRAINED :
473: SSH2_AGENTC_ADD_IDENTITY;
1.94 djm 474: if ((r = sshbuf_put_u8(msg, type)) != 0 ||
475: (r = ssh_encode_identity_ssh2(msg, key, comment)) != 0)
476: goto out;
1.22 markus 477: break;
478: default:
1.94 djm 479: r = SSH_ERR_INVALID_ARGUMENT;
480: goto out;
1.12 markus 481: }
1.94 djm 482: if (constrained &&
483: (r = encode_constraints(msg, life, confirm)) != 0)
484: goto out;
485: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
486: goto out;
487: if ((r = sshbuf_get_u8(msg, &type)) != 0)
488: goto out;
489: r = decode_reply(type);
490: out:
491: sshbuf_free(msg);
492: return r;
1.54 markus 493: }
494:
1.14 markus 495: /*
1.94 djm 496: * Removes an identity from the authentication server.
497: * This call is intended only for use by ssh-add(1) and like applications.
1.14 markus 498: */
1.18 markus 499: int
1.94 djm 500: ssh_remove_identity(int sock, struct sshkey *key)
1.1 deraadt 501: {
1.94 djm 502: struct sshbuf *msg;
503: int r;
504: u_char type, *blob = NULL;
505: size_t blen;
1.12 markus 506:
1.94 djm 507: if ((msg = sshbuf_new()) == NULL)
508: return SSH_ERR_ALLOC_FAIL;
1.12 markus 509:
1.93 markus 510: if (key->type != KEY_UNSPEC) {
1.94 djm 511: if ((r = sshkey_to_blob(key, &blob, &blen)) != 0)
512: goto out;
513: if ((r = sshbuf_put_u8(msg,
514: SSH2_AGENTC_REMOVE_IDENTITY)) != 0 ||
515: (r = sshbuf_put_string(msg, blob, blen)) != 0)
516: goto out;
1.51 markus 517: } else {
1.94 djm 518: r = SSH_ERR_INVALID_ARGUMENT;
519: goto out;
1.51 markus 520: }
1.94 djm 521: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
522: goto out;
523: if ((r = sshbuf_get_u8(msg, &type)) != 0)
524: goto out;
525: r = decode_reply(type);
526: out:
527: if (blob != NULL) {
528: explicit_bzero(blob, blen);
529: free(blob);
1.42 markus 530: }
1.94 djm 531: sshbuf_free(msg);
532: return r;
1.42 markus 533: }
534:
1.94 djm 535: /*
536: * Add/remove an token-based identity from the authentication server.
537: * This call is intended only for use by ssh-add(1) and like applications.
538: */
1.42 markus 539: int
1.94 djm 540: ssh_update_card(int sock, int add, const char *reader_id, const char *pin,
541: u_int life, u_int confirm)
1.42 markus 542: {
1.94 djm 543: struct sshbuf *msg;
544: int r, constrained = (life || confirm);
545: u_char type;
1.60 djm 546:
547: if (add) {
548: type = constrained ?
549: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
550: SSH_AGENTC_ADD_SMARTCARD_KEY;
551: } else
552: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 553:
1.94 djm 554: if ((msg = sshbuf_new()) == NULL)
555: return SSH_ERR_ALLOC_FAIL;
556: if ((r = sshbuf_put_u8(msg, type)) != 0 ||
557: (r = sshbuf_put_cstring(msg, reader_id)) != 0 ||
558: (r = sshbuf_put_cstring(msg, pin)) != 0)
559: goto out;
560: if (constrained &&
561: (r = encode_constraints(msg, life, confirm)) != 0)
562: goto out;
563: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
564: goto out;
565: if ((r = sshbuf_get_u8(msg, &type)) != 0)
566: goto out;
567: r = decode_reply(type);
568: out:
569: sshbuf_free(msg);
570: return r;
1.12 markus 571: }
572:
1.14 markus 573: /*
1.94 djm 574: * Removes all identities from the agent.
575: * This call is intended only for use by ssh-add(1) and like applications.
1.14 markus 576: */
1.18 markus 577: int
1.94 djm 578: ssh_remove_all_identities(int sock, int version)
1.1 deraadt 579: {
1.94 djm 580: struct sshbuf *msg;
581: u_char type = (version == 1) ?
582: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
583: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
584: int r;
585:
586: if ((msg = sshbuf_new()) == NULL)
587: return SSH_ERR_ALLOC_FAIL;
588: if ((r = sshbuf_put_u8(msg, type)) != 0)
589: goto out;
590: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
591: goto out;
592: if ((r = sshbuf_get_u8(msg, &type)) != 0)
593: goto out;
594: r = decode_reply(type);
595: out:
596: sshbuf_free(msg);
597: return r;
1.12 markus 598: }
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