Ashley Mills / tinydtls

Version 0.5.0 of tinydtls

Dependents:   tinydtls_test_cellular tinydtls_test_ethernet tiny-dtls

peer.c@1:598a56fe116e, 2014-02-12 (annotated)

Committer:
ashleymills
Date:
Wed Feb 12 09:30:16 2014 +0000
Revision:
1:598a56fe116e
Parent:
0:ff9ebe0cf0e9 
Explicitly removed something instead of relying on MACRO to disable it. Mbed can't use it.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ashleymills 0:ff9ebe0cf0e9 1 /* dtls -- a very basic DTLS implementation
ashleymills 0:ff9ebe0cf0e9 2 *
ashleymills 0:ff9ebe0cf0e9 3 * Copyright (C) 2011--2013 Olaf Bergmann <bergmann@tzi.org>
ashleymills 0:ff9ebe0cf0e9 4 *
ashleymills 0:ff9ebe0cf0e9 5 * Permission is hereby granted, free of charge, to any person
ashleymills 0:ff9ebe0cf0e9 6 * obtaining a copy of this software and associated documentation
ashleymills 0:ff9ebe0cf0e9 7 * files (the "Software"), to deal in the Software without
ashleymills 0:ff9ebe0cf0e9 8 * restriction, including without limitation the rights to use, copy,
ashleymills 0:ff9ebe0cf0e9 9 * modify, merge, publish, distribute, sublicense, and/or sell copies
ashleymills 0:ff9ebe0cf0e9 10 * of the Software, and to permit persons to whom the Software is
ashleymills 0:ff9ebe0cf0e9 11 * furnished to do so, subject to the following conditions:
ashleymills 0:ff9ebe0cf0e9 12 *
ashleymills 0:ff9ebe0cf0e9 13 * The above copyright notice and this permission notice shall be
ashleymills 0:ff9ebe0cf0e9 14 * included in all copies or substantial portions of the Software.
ashleymills 0:ff9ebe0cf0e9 15 *
ashleymills 0:ff9ebe0cf0e9 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
ashleymills 0:ff9ebe0cf0e9 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
ashleymills 0:ff9ebe0cf0e9 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
ashleymills 0:ff9ebe0cf0e9 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
ashleymills 0:ff9ebe0cf0e9 20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ashleymills 0:ff9ebe0cf0e9 21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
ashleymills 0:ff9ebe0cf0e9 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
ashleymills 0:ff9ebe0cf0e9 23 * SOFTWARE.
ashleymills 0:ff9ebe0cf0e9 24 */
ashleymills 0:ff9ebe0cf0e9 25
ashleymills 0:ff9ebe0cf0e9 26 #include "peer.h"
ashleymills 0:ff9ebe0cf0e9 27 #include "debug.h"
ashleymills 0:ff9ebe0cf0e9 28
ashleymills 0:ff9ebe0cf0e9 29 #define __DEBUG__ 0
ashleymills 0:ff9ebe0cf0e9 30 #ifndef __MODULE__
ashleymills 0:ff9ebe0cf0e9 31 #define __MODULE__ "peer.c"
ashleymills 0:ff9ebe0cf0e9 32 #endif
ashleymills 0:ff9ebe0cf0e9 33
ashleymills 0:ff9ebe0cf0e9 34 #include "dbg.h"
ashleymills 0:ff9ebe0cf0e9 35
ashleymills 0:ff9ebe0cf0e9 36 #ifndef WITH_CONTIKI
ashleymills 0:ff9ebe0cf0e9 37 void peer_init()
ashleymills 0:ff9ebe0cf0e9 38 {
ashleymills 0:ff9ebe0cf0e9 39 }
ashleymills 0:ff9ebe0cf0e9 40
ashleymills 0:ff9ebe0cf0e9 41 static inline dtls_peer_t *
ashleymills 0:ff9ebe0cf0e9 42 dtls_malloc_peer() {
ashleymills 0:ff9ebe0cf0e9 43 return (dtls_peer_t *)malloc(sizeof(dtls_peer_t));
ashleymills 0:ff9ebe0cf0e9 44 }
ashleymills 0:ff9ebe0cf0e9 45
ashleymills 0:ff9ebe0cf0e9 46 void
ashleymills 0:ff9ebe0cf0e9 47 dtls_free_peer(dtls_peer_t *peer) {
ashleymills 0:ff9ebe0cf0e9 48 dtls_cipher_free(peer->security_params.read_cipher);
ashleymills 0:ff9ebe0cf0e9 49 dtls_cipher_free(peer->security_params.write_cipher);
ashleymills 0:ff9ebe0cf0e9 50
ashleymills 0:ff9ebe0cf0e9 51 free(peer);
ashleymills 0:ff9ebe0cf0e9 52 }
ashleymills 0:ff9ebe0cf0e9 53 #else /* WITH_CONTIKI */
ashleymills 0:ff9ebe0cf0e9 54
ashleymills 0:ff9ebe0cf0e9 55 #include "memb.h"
ashleymills 0:ff9ebe0cf0e9 56 MEMB(peer_storage, dtls_peer_t, DTLS_PEER_MAX);
ashleymills 0:ff9ebe0cf0e9 57
ashleymills 0:ff9ebe0cf0e9 58 void
ashleymills 0:ff9ebe0cf0e9 59 peer_init() {
ashleymills 0:ff9ebe0cf0e9 60 memb_init(&peer_storage);
ashleymills 0:ff9ebe0cf0e9 61 }
ashleymills 0:ff9ebe0cf0e9 62
ashleymills 0:ff9ebe0cf0e9 63 static inline dtls_peer_t *
ashleymills 0:ff9ebe0cf0e9 64 dtls_malloc_peer() {
ashleymills 0:ff9ebe0cf0e9 65 return memb_alloc(&peer_storage);
ashleymills 0:ff9ebe0cf0e9 66 }
ashleymills 0:ff9ebe0cf0e9 67
ashleymills 0:ff9ebe0cf0e9 68 void
ashleymills 0:ff9ebe0cf0e9 69 dtls_free_peer(dtls_peer_t *peer) {
ashleymills 0:ff9ebe0cf0e9 70 dtls_cipher_free(peer->security_params.read_cipher);
ashleymills 0:ff9ebe0cf0e9 71 dtls_cipher_free(peer->security_params.write_cipher);
ashleymills 0:ff9ebe0cf0e9 72
ashleymills 0:ff9ebe0cf0e9 73 memb_free(&peer_storage, peer);
ashleymills 0:ff9ebe0cf0e9 74 }
ashleymills 0:ff9ebe0cf0e9 75 #endif /* WITH_CONTIKI */
ashleymills 0:ff9ebe0cf0e9 76
ashleymills 0:ff9ebe0cf0e9 77 dtls_peer_t *
ashleymills 0:ff9ebe0cf0e9 78 dtls_new_peer(const session_t *session) {
ashleymills 0:ff9ebe0cf0e9 79 dtls_peer_t *peer;
ashleymills 0:ff9ebe0cf0e9 80
ashleymills 0:ff9ebe0cf0e9 81 peer = dtls_malloc_peer();
ashleymills 0:ff9ebe0cf0e9 82 if (peer) {
ashleymills 0:ff9ebe0cf0e9 83 memset(peer, 0, sizeof(dtls_peer_t));
ashleymills 0:ff9ebe0cf0e9 84 memcpy(&peer->session, session, sizeof(session_t));
ashleymills 0:ff9ebe0cf0e9 85
ashleymills 0:ff9ebe0cf0e9 86 dtls_dsrv_log_addr(LOG_DEBUG, "dtls_new_peer", session);
ashleymills 0:ff9ebe0cf0e9 87 /* initially allow the NULL cipher */
ashleymills 0:ff9ebe0cf0e9 88 peer->security_params.cipher = TLS_NULL_WITH_NULL_NULL;
ashleymills 0:ff9ebe0cf0e9 89 peer->security_params.compression = TLS_COMPRESSION_NULL;
ashleymills 0:ff9ebe0cf0e9 90
ashleymills 0:ff9ebe0cf0e9 91 /* initialize the handshake hash wrt. the hard-coded DTLS version */
ashleymills 0:ff9ebe0cf0e9 92 DBG("DTLSv12: initialize HASH_SHA256");
ashleymills 0:ff9ebe0cf0e9 93 /* TLS 1.2: PRF(secret, label, seed) = P_<hash>(secret, label + seed) */
ashleymills 0:ff9ebe0cf0e9 94 /* FIXME: we use the default SHA256 here, might need to support other
ashleymills 0:ff9ebe0cf0e9 95 hash functions as well */
ashleymills 0:ff9ebe0cf0e9 96 dtls_hash_init(&peer->hs_state.hs_hash);
ashleymills 0:ff9ebe0cf0e9 97 }
ashleymills 0:ff9ebe0cf0e9 98
ashleymills 0:ff9ebe0cf0e9 99 return peer;
ashleymills 0:ff9ebe0cf0e9 100 }