1/*
2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25#include "inner.h"
26
27/* see bearssl_ssl.h */
28void
29br_ssl_client_zero(br_ssl_client_context *cc)
30{
31	/*
32	 * For really standard C, we should explicitly set to NULL all
33	 * pointers, and 0 all other fields. However, on all our target
34	 * architectures, a direct memset() will work, be faster, and
35	 * use a lot less code.
36	 */
37	memset(cc, 0, sizeof *cc);
38}
39
40/* see bearssl_ssl.h */
41int
42br_ssl_client_reset(br_ssl_client_context *cc,
43	const char *server_name, int resume_session)
44{
45	size_t n;
46
47	br_ssl_engine_set_buffer(&cc->eng, NULL, 0, 0);
48	cc->eng.version_out = cc->eng.version_min;
49	if (!resume_session) {
50		br_ssl_client_forget_session(cc);
51	}
52	if (!br_ssl_engine_init_rand(&cc->eng)) {
53		return 0;
54	}
55
56	/*
57	 * We always set back the "reneg" flag to 0 because we use it
58	 * to distinguish between first handshake and renegotiation.
59	 * Note that "renegotiation" and "session resumption" are two
60	 * different things.
61	 */
62	cc->eng.reneg = 0;
63
64	if (server_name == NULL) {
65		cc->eng.server_name[0] = 0;
66	} else {
67		n = strlen(server_name) + 1;
68		if (n > sizeof cc->eng.server_name) {
69			br_ssl_engine_fail(&cc->eng, BR_ERR_BAD_PARAM);
70			return 0;
71		}
72		memcpy(cc->eng.server_name, server_name, n);
73	}
74
75	br_ssl_engine_hs_reset(&cc->eng,
76		br_ssl_hs_client_init_main, br_ssl_hs_client_run);
77	return br_ssl_engine_last_error(&cc->eng) == BR_ERR_OK;
78}
79