Annotation of src/usr.bin/ssh/authfd.c, Revision 1.117
1.117 ! djm 1: /* $OpenBSD: authfd.c,v 1.116 2019/09/03 08:28:30 djm 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"
1.94 djm 52: #include "sshbuf.h"
53: #include "sshkey.h"
1.22 markus 54: #include "authfd.h"
1.33 markus 55: #include "cipher.h"
1.28 markus 56: #include "compat.h"
1.33 markus 57: #include "log.h"
58: #include "atomicio.h"
1.74 djm 59: #include "misc.h"
1.94 djm 60: #include "ssherr.h"
1.2 provos 61:
1.94 djm 62: #define MAX_AGENT_IDENTITIES 2048 /* Max keys in agent reply */
63: #define MAX_AGENT_REPLY_LEN (256 * 1024) /* Max bytes in agent reply */
1.21 markus 64:
1.29 markus 65: /* macro to check for "agent failure" message */
66: #define agent_failed(x) \
1.94 djm 67: ((x == SSH_AGENT_FAILURE) || \
68: (x == SSH_COM_AGENT2_FAILURE) || \
1.55 deraadt 69: (x == SSH2_AGENT_FAILURE))
1.29 markus 70:
1.94 djm 71: /* Convert success/failure response from agent to a err.h status */
72: static int
73: decode_reply(u_char type)
1.57 stevesk 74: {
1.94 djm 75: if (agent_failed(type))
76: return SSH_ERR_AGENT_FAILURE;
77: else if (type == SSH_AGENT_SUCCESS)
1.57 stevesk 78: return 0;
1.94 djm 79: else
80: return SSH_ERR_INVALID_FORMAT;
1.57 stevesk 81: }
82:
1.1 deraadt 83: /* Returns the number of the authentication fd, or -1 if there is none. */
1.2 provos 84: int
1.94 djm 85: ssh_get_authentication_socket(int *fdp)
1.1 deraadt 86: {
1.12 markus 87: const char *authsocket;
1.94 djm 88: int sock, oerrno;
1.12 markus 89: struct sockaddr_un sunaddr;
90:
1.94 djm 91: if (fdp != NULL)
92: *fdp = -1;
93:
1.12 markus 94: authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
1.112 djm 95: if (authsocket == NULL || *authsocket == '\0')
1.94 djm 96: return SSH_ERR_AGENT_NOT_PRESENT;
1.12 markus 97:
1.92 tedu 98: memset(&sunaddr, 0, sizeof(sunaddr));
1.12 markus 99: sunaddr.sun_family = AF_UNIX;
100: strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
101:
1.115 deraadt 102: if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
1.94 djm 103: return SSH_ERR_SYSTEM_ERROR;
1.12 markus 104:
105: /* close on exec */
1.94 djm 106: if (fcntl(sock, F_SETFD, FD_CLOEXEC) == -1 ||
1.115 deraadt 107: connect(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
1.94 djm 108: oerrno = errno;
1.12 markus 109: close(sock);
1.94 djm 110: errno = oerrno;
111: return SSH_ERR_SYSTEM_ERROR;
1.12 markus 112: }
1.94 djm 113: if (fdp != NULL)
114: *fdp = sock;
115: else
1.12 markus 116: close(sock);
1.94 djm 117: return 0;
1.1 deraadt 118: }
119:
1.94 djm 120: /* Communicate with agent: send request and read reply */
1.41 itojun 121: static int
1.94 djm 122: ssh_request_reply(int sock, struct sshbuf *request, struct sshbuf *reply)
1.24 markus 123: {
1.94 djm 124: int r;
125: size_t l, len;
1.24 markus 126: char buf[1024];
127:
128: /* Get the length of the message, and format it in the buffer. */
1.94 djm 129: len = sshbuf_len(request);
1.108 markus 130: POKE_U32(buf, len);
1.24 markus 131:
132: /* Send the length and then the packet to the agent. */
1.94 djm 133: if (atomicio(vwrite, sock, buf, 4) != 4 ||
1.111 markus 134: atomicio(vwrite, sock, sshbuf_mutable_ptr(request),
1.94 djm 135: sshbuf_len(request)) != sshbuf_len(request))
136: return SSH_ERR_AGENT_COMMUNICATION;
1.24 markus 137: /*
138: * Wait for response from the agent. First read the length of the
139: * response packet.
140: */
1.94 djm 141: if (atomicio(read, sock, buf, 4) != 4)
142: return SSH_ERR_AGENT_COMMUNICATION;
1.24 markus 143:
144: /* Extract the length, and check it for sanity. */
1.108 markus 145: len = PEEK_U32(buf);
1.94 djm 146: if (len > MAX_AGENT_REPLY_LEN)
147: return SSH_ERR_INVALID_FORMAT;
1.24 markus 148:
149: /* Read the rest of the response in to the buffer. */
1.94 djm 150: sshbuf_reset(reply);
1.24 markus 151: while (len > 0) {
152: l = len;
153: if (l > sizeof(buf))
154: l = sizeof(buf);
1.94 djm 155: if (atomicio(read, sock, buf, l) != l)
156: return SSH_ERR_AGENT_COMMUNICATION;
157: if ((r = sshbuf_put(reply, buf, l)) != 0)
158: return r;
1.24 markus 159: len -= l;
160: }
1.94 djm 161: return 0;
1.24 markus 162: }
163:
1.14 markus 164: /*
165: * Closes the agent socket if it should be closed (depends on how it was
166: * obtained). The argument must have been returned by
167: * ssh_get_authentication_socket().
168: */
1.18 markus 169: void
1.12 markus 170: ssh_close_authentication_socket(int sock)
1.1 deraadt 171: {
1.12 markus 172: if (getenv(SSH_AUTHSOCKET_ENV_NAME))
173: close(sock);
1.1 deraadt 174: }
175:
1.94 djm 176: /* Lock/unlock agent */
177: int
178: ssh_lock_agent(int sock, int lock, const char *password)
1.1 deraadt 179: {
1.94 djm 180: int r;
181: u_char type = lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK;
182: struct sshbuf *msg;
183:
184: if ((msg = sshbuf_new()) == NULL)
185: return SSH_ERR_ALLOC_FAIL;
186: if ((r = sshbuf_put_u8(msg, type)) != 0 ||
187: (r = sshbuf_put_cstring(msg, password)) != 0)
188: goto out;
189: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
190: goto out;
191: if ((r = sshbuf_get_u8(msg, &type)) != 0)
192: goto out;
193: r = decode_reply(type);
194: out:
195: sshbuf_free(msg);
196: return r;
1.1 deraadt 197: }
198:
1.50 markus 199:
1.94 djm 200: static int
201: deserialise_identity2(struct sshbuf *ids, struct sshkey **keyp, char **commentp)
1.50 markus 202: {
1.94 djm 203: int r;
204: char *comment = NULL;
205: const u_char *blob;
206: size_t blen;
207:
208: if ((r = sshbuf_get_string_direct(ids, &blob, &blen)) != 0 ||
209: (r = sshbuf_get_cstring(ids, &comment, NULL)) != 0)
210: goto out;
211: if ((r = sshkey_from_blob(blob, blen, keyp)) != 0)
212: goto out;
213: if (commentp != NULL) {
214: *commentp = comment;
215: comment = NULL;
216: }
217: r = 0;
218: out:
219: free(comment);
220: return r;
1.1 deraadt 221: }
222:
1.14 markus 223: /*
1.94 djm 224: * Fetch list of identities held by the agent.
1.14 markus 225: */
1.30 markus 226: int
1.103 naddy 227: ssh_fetch_identitylist(int sock, struct ssh_identitylist **idlp)
1.1 deraadt 228: {
1.103 naddy 229: u_char type;
1.94 djm 230: u_int32_t num, i;
231: struct sshbuf *msg;
232: struct ssh_identitylist *idl = NULL;
233: int r;
1.25 markus 234:
1.14 markus 235: /*
236: * Send a message to the agent requesting for a list of the
237: * identities it can represent.
238: */
1.94 djm 239: if ((msg = sshbuf_new()) == NULL)
240: return SSH_ERR_ALLOC_FAIL;
1.103 naddy 241: if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_REQUEST_IDENTITIES)) != 0)
1.94 djm 242: goto out;
1.12 markus 243:
1.94 djm 244: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
245: goto out;
1.1 deraadt 246:
1.12 markus 247: /* Get message type, and verify that we got a proper answer. */
1.94 djm 248: if ((r = sshbuf_get_u8(msg, &type)) != 0)
249: goto out;
1.29 markus 250: if (agent_failed(type)) {
1.94 djm 251: r = SSH_ERR_AGENT_FAILURE;
252: goto out;
1.103 naddy 253: } else if (type != SSH2_AGENT_IDENTITIES_ANSWER) {
1.94 djm 254: r = SSH_ERR_INVALID_FORMAT;
255: goto out;
1.25 markus 256: }
1.12 markus 257:
258: /* Get the number of entries in the response and check it for sanity. */
1.94 djm 259: if ((r = sshbuf_get_u32(msg, &num)) != 0)
260: goto out;
261: if (num > MAX_AGENT_IDENTITIES) {
262: r = SSH_ERR_INVALID_FORMAT;
263: goto out;
264: }
265: if (num == 0) {
266: r = SSH_ERR_AGENT_NO_IDENTITIES;
267: goto out;
268: }
269:
270: /* Deserialise the response into a list of keys/comments */
271: if ((idl = calloc(1, sizeof(*idl))) == NULL ||
272: (idl->keys = calloc(num, sizeof(*idl->keys))) == NULL ||
273: (idl->comments = calloc(num, sizeof(*idl->comments))) == NULL) {
274: r = SSH_ERR_ALLOC_FAIL;
275: goto out;
276: }
277: for (i = 0; i < num;) {
1.103 naddy 278: if ((r = deserialise_identity2(msg, &(idl->keys[i]),
279: &(idl->comments[i]))) != 0) {
280: if (r == SSH_ERR_KEY_TYPE_UNKNOWN) {
281: /* Gracefully skip unknown key types */
282: num--;
283: continue;
284: } else
285: goto out;
1.94 djm 286: }
287: i++;
288: }
289: idl->nkeys = num;
290: *idlp = idl;
291: idl = NULL;
292: r = 0;
293: out:
294: sshbuf_free(msg);
295: if (idl != NULL)
296: ssh_free_identitylist(idl);
297: return r;
1.30 markus 298: }
299:
1.94 djm 300: void
301: ssh_free_identitylist(struct ssh_identitylist *idl)
1.30 markus 302: {
1.94 djm 303: size_t i;
1.1 deraadt 304:
1.94 djm 305: if (idl == NULL)
306: return;
307: for (i = 0; i < idl->nkeys; i++) {
308: if (idl->keys != NULL)
309: sshkey_free(idl->keys[i]);
310: if (idl->comments != NULL)
311: free(idl->comments[i]);
1.25 markus 312: }
1.116 djm 313: free(idl->keys);
314: free(idl->comments);
1.94 djm 315: free(idl);
1.117 ! djm 316: }
! 317:
! 318: /*
! 319: * Check if the ssh agent has a given key.
! 320: * Returns 0 if found, or a negative SSH_ERR_* error code on failure.
! 321: */
! 322: int
! 323: ssh_agent_has_key(int sock, struct sshkey *key)
! 324: {
! 325: int r, ret = SSH_ERR_KEY_NOT_FOUND;
! 326: size_t i;
! 327: struct ssh_identitylist *idlist = NULL;
! 328:
! 329: if ((r = ssh_fetch_identitylist(sock, &idlist)) < 0) {
! 330: return r;
! 331: }
! 332:
! 333: for (i = 0; i < idlist->nkeys; i++) {
! 334: if (sshkey_equal_public(idlist->keys[i], key)) {
! 335: ret = 0;
! 336: break;
! 337: }
! 338: }
! 339:
! 340: ssh_free_identitylist(idlist);
! 341: return ret;
1.1 deraadt 342: }
343:
1.14 markus 344: /*
1.94 djm 345: * Sends a challenge (typically from a server via ssh(1)) to the agent,
346: * and waits for a response from the agent.
347: * Returns true (non-zero) if the agent gave the correct answer, zero
348: * otherwise.
1.14 markus 349: */
1.1 deraadt 350:
351:
1.109 djm 352: /* encode signature algorithm in flag bits, so we can keep the msg format */
1.100 markus 353: static u_int
1.104 djm 354: agent_encode_alg(const struct sshkey *key, const char *alg)
1.100 markus 355: {
1.113 djm 356: if (alg != NULL && sshkey_type_plain(key->type) == KEY_RSA) {
357: if (strcmp(alg, "rsa-sha2-256") == 0 ||
358: strcmp(alg, "rsa-sha2-256-cert-v01@openssh.com") == 0)
1.100 markus 359: return SSH_AGENT_RSA_SHA2_256;
1.113 djm 360: if (strcmp(alg, "rsa-sha2-512") == 0 ||
361: strcmp(alg, "rsa-sha2-512-cert-v01@openssh.com") == 0)
1.100 markus 362: return SSH_AGENT_RSA_SHA2_512;
363: }
364: return 0;
365: }
366:
1.94 djm 367: /* ask agent to sign data, returns err.h code on error, 0 on success */
1.25 markus 368: int
1.104 djm 369: ssh_agent_sign(int sock, const struct sshkey *key,
1.94 djm 370: u_char **sigp, size_t *lenp,
1.100 markus 371: const u_char *data, size_t datalen, const char *alg, u_int compat)
1.94 djm 372: {
373: struct sshbuf *msg;
1.110 djm 374: u_char *sig = NULL, type = 0;
375: size_t len = 0;
1.94 djm 376: u_int flags = 0;
377: int r = SSH_ERR_INTERNAL_ERROR;
378:
1.97 markus 379: *sigp = NULL;
380: *lenp = 0;
1.94 djm 381:
382: if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE)
383: return SSH_ERR_INVALID_ARGUMENT;
384: if ((msg = sshbuf_new()) == NULL)
385: return SSH_ERR_ALLOC_FAIL;
1.100 markus 386: flags |= agent_encode_alg(key, alg);
1.94 djm 387: if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 ||
1.110 djm 388: (r = sshkey_puts(key, msg)) != 0 ||
1.94 djm 389: (r = sshbuf_put_string(msg, data, datalen)) != 0 ||
390: (r = sshbuf_put_u32(msg, flags)) != 0)
391: goto out;
1.99 jsg 392: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
1.94 djm 393: goto out;
394: if ((r = sshbuf_get_u8(msg, &type)) != 0)
395: goto out;
1.29 markus 396: if (agent_failed(type)) {
1.94 djm 397: r = SSH_ERR_AGENT_FAILURE;
398: goto out;
1.25 markus 399: } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
1.94 djm 400: r = SSH_ERR_INVALID_FORMAT;
401: goto out;
402: }
1.110 djm 403: if ((r = sshbuf_get_string(msg, &sig, &len)) != 0)
404: goto out;
405: /* Check what we actually got back from the agent. */
406: if ((r = sshkey_check_sigtype(sig, len, alg)) != 0)
1.94 djm 407: goto out;
1.110 djm 408: /* success */
409: *sigp = sig;
1.97 markus 410: *lenp = len;
1.110 djm 411: sig = NULL;
412: len = 0;
1.94 djm 413: r = 0;
414: out:
1.110 djm 415: freezero(sig, len);
1.94 djm 416: sshbuf_free(msg);
417: return r;
1.25 markus 418: }
419:
1.22 markus 420: /* Encode key for a message to the agent. */
421:
422:
1.94 djm 423: static int
1.108 markus 424: encode_constraints(struct sshbuf *m, u_int life, u_int confirm, u_int maxsign)
1.94 djm 425: {
426: int r;
427:
428: if (life != 0) {
429: if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_LIFETIME)) != 0 ||
430: (r = sshbuf_put_u32(m, life)) != 0)
431: goto out;
432: }
433: if (confirm != 0) {
434: if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_CONFIRM)) != 0)
435: goto out;
436: }
1.108 markus 437: if (maxsign != 0) {
438: if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_MAXSIGN)) != 0 ||
439: (r = sshbuf_put_u32(m, maxsign)) != 0)
440: goto out;
441: }
1.94 djm 442: r = 0;
443: out:
444: return r;
1.22 markus 445: }
446:
1.14 markus 447: /*
1.94 djm 448: * Adds an identity to the authentication server.
449: * This call is intended only for use by ssh-add(1) and like applications.
1.14 markus 450: */
1.18 markus 451: int
1.114 djm 452: ssh_add_identity_constrained(int sock, struct sshkey *key,
1.108 markus 453: const char *comment, u_int life, u_int confirm, u_int maxsign)
1.1 deraadt 454: {
1.94 djm 455: struct sshbuf *msg;
1.108 markus 456: int r, constrained = (life || confirm || maxsign);
1.94 djm 457: u_char type;
1.12 markus 458:
1.94 djm 459: if ((msg = sshbuf_new()) == NULL)
460: return SSH_ERR_ALLOC_FAIL;
1.22 markus 461:
462: switch (key->type) {
1.93 markus 463: #ifdef WITH_OPENSSL
1.22 markus 464: case KEY_RSA:
1.82 djm 465: case KEY_RSA_CERT:
1.22 markus 466: case KEY_DSA:
1.82 djm 467: case KEY_DSA_CERT:
1.84 djm 468: case KEY_ECDSA:
469: case KEY_ECDSA_CERT:
1.93 markus 470: #endif
1.90 markus 471: case KEY_ED25519:
472: case KEY_ED25519_CERT:
1.108 markus 473: case KEY_XMSS:
474: case KEY_XMSS_CERT:
1.54 markus 475: type = constrained ?
476: SSH2_AGENTC_ADD_ID_CONSTRAINED :
477: SSH2_AGENTC_ADD_IDENTITY;
1.94 djm 478: if ((r = sshbuf_put_u8(msg, type)) != 0 ||
1.108 markus 479: (r = sshkey_private_serialize_maxsign(key, msg, maxsign,
480: NULL)) != 0 ||
481: (r = sshbuf_put_cstring(msg, comment)) != 0)
1.94 djm 482: goto out;
1.22 markus 483: break;
484: default:
1.94 djm 485: r = SSH_ERR_INVALID_ARGUMENT;
486: goto out;
1.12 markus 487: }
1.94 djm 488: if (constrained &&
1.108 markus 489: (r = encode_constraints(msg, life, confirm, maxsign)) != 0)
1.94 djm 490: goto out;
491: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
492: goto out;
493: if ((r = sshbuf_get_u8(msg, &type)) != 0)
494: goto out;
495: r = decode_reply(type);
496: out:
497: sshbuf_free(msg);
498: return r;
1.54 markus 499: }
500:
1.14 markus 501: /*
1.94 djm 502: * Removes an identity from the authentication server.
503: * This call is intended only for use by ssh-add(1) and like applications.
1.14 markus 504: */
1.18 markus 505: int
1.94 djm 506: ssh_remove_identity(int sock, struct sshkey *key)
1.1 deraadt 507: {
1.94 djm 508: struct sshbuf *msg;
509: int r;
510: u_char type, *blob = NULL;
511: size_t blen;
1.12 markus 512:
1.94 djm 513: if ((msg = sshbuf_new()) == NULL)
514: return SSH_ERR_ALLOC_FAIL;
1.12 markus 515:
1.93 markus 516: if (key->type != KEY_UNSPEC) {
1.94 djm 517: if ((r = sshkey_to_blob(key, &blob, &blen)) != 0)
518: goto out;
519: if ((r = sshbuf_put_u8(msg,
520: SSH2_AGENTC_REMOVE_IDENTITY)) != 0 ||
521: (r = sshbuf_put_string(msg, blob, blen)) != 0)
522: goto out;
1.51 markus 523: } else {
1.94 djm 524: r = SSH_ERR_INVALID_ARGUMENT;
525: goto out;
1.51 markus 526: }
1.94 djm 527: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
528: goto out;
529: if ((r = sshbuf_get_u8(msg, &type)) != 0)
530: goto out;
531: r = decode_reply(type);
532: out:
533: if (blob != NULL) {
534: explicit_bzero(blob, blen);
535: free(blob);
1.42 markus 536: }
1.94 djm 537: sshbuf_free(msg);
538: return r;
1.42 markus 539: }
540:
1.94 djm 541: /*
542: * Add/remove an token-based identity from the authentication server.
543: * This call is intended only for use by ssh-add(1) and like applications.
544: */
1.42 markus 545: int
1.94 djm 546: ssh_update_card(int sock, int add, const char *reader_id, const char *pin,
547: u_int life, u_int confirm)
1.42 markus 548: {
1.94 djm 549: struct sshbuf *msg;
550: int r, constrained = (life || confirm);
551: u_char type;
1.60 djm 552:
553: if (add) {
554: type = constrained ?
555: SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
556: SSH_AGENTC_ADD_SMARTCARD_KEY;
557: } else
558: type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
1.42 markus 559:
1.94 djm 560: if ((msg = sshbuf_new()) == NULL)
561: return SSH_ERR_ALLOC_FAIL;
562: if ((r = sshbuf_put_u8(msg, type)) != 0 ||
563: (r = sshbuf_put_cstring(msg, reader_id)) != 0 ||
564: (r = sshbuf_put_cstring(msg, pin)) != 0)
565: goto out;
566: if (constrained &&
1.108 markus 567: (r = encode_constraints(msg, life, confirm, 0)) != 0)
1.94 djm 568: goto out;
569: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
570: goto out;
571: if ((r = sshbuf_get_u8(msg, &type)) != 0)
572: goto out;
573: r = decode_reply(type);
574: out:
575: sshbuf_free(msg);
576: return r;
1.12 markus 577: }
578:
1.14 markus 579: /*
1.94 djm 580: * Removes all identities from the agent.
581: * This call is intended only for use by ssh-add(1) and like applications.
1.102 djm 582: *
583: * This supports the SSH protocol 1 message to because, when clearing all
584: * keys from an agent, we generally want to clear both protocol v1 and v2
585: * keys.
1.14 markus 586: */
1.18 markus 587: int
1.94 djm 588: ssh_remove_all_identities(int sock, int version)
1.1 deraadt 589: {
1.94 djm 590: struct sshbuf *msg;
591: u_char type = (version == 1) ?
592: SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
593: SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
594: int r;
595:
596: if ((msg = sshbuf_new()) == NULL)
597: return SSH_ERR_ALLOC_FAIL;
598: if ((r = sshbuf_put_u8(msg, type)) != 0)
599: goto out;
600: if ((r = ssh_request_reply(sock, msg, msg)) != 0)
601: goto out;
602: if ((r = sshbuf_get_u8(msg, &type)) != 0)
603: goto out;
604: r = decode_reply(type);
605: out:
606: sshbuf_free(msg);
607: return r;
1.12 markus 608: }
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