Fix: make static ECDH selectable with the br_ssl_client_set_single_ec() helper function.
[BearSSL] / ssl / ssl_server_full_rsa.c
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 */
28 void
29 br_ssl_server_init_full_rsa(br_ssl_server_context *cc,
30 const br_x509_certificate *chain, size_t chain_len,
31 const br_rsa_private_key *sk)
32 {
33 /*
34 * The "full" profile supports all implemented cipher suites.
35 *
36 * Rationale for suite order, from most important to least
37 * important rule:
38 *
39 * -- Don't use 3DES if AES is available.
40 * -- Try to have Forward Secrecy (ECDHE suite) if possible.
41 * -- GCM is better than CBC.
42 * -- AES-128 is preferred over AES-256 (AES-128 is already
43 * strong enough, and AES-256 is 40% more expensive).
44 */
45 static const uint16_t suites[] = {
46 BR_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
47 BR_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
48 BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
49 BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
50 BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
51 BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
52 BR_TLS_RSA_WITH_AES_128_GCM_SHA256,
53 BR_TLS_RSA_WITH_AES_256_GCM_SHA384,
54 BR_TLS_RSA_WITH_AES_128_CBC_SHA256,
55 BR_TLS_RSA_WITH_AES_256_CBC_SHA256,
56 BR_TLS_RSA_WITH_AES_128_CBC_SHA,
57 BR_TLS_RSA_WITH_AES_256_CBC_SHA,
58 BR_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
59 BR_TLS_RSA_WITH_3DES_EDE_CBC_SHA
60 };
61
62 /*
63 * All hash functions are activated.
64 * Note: the X.509 validation engine will nonetheless refuse to
65 * validate signatures that use MD5 as hash function.
66 */
67 static const br_hash_class *hashes[] = {
68 &br_md5_vtable,
69 &br_sha1_vtable,
70 &br_sha224_vtable,
71 &br_sha256_vtable,
72 &br_sha384_vtable,
73 &br_sha512_vtable
74 };
75
76 int id;
77
78 /*
79 * Reset server context and set supported versions from TLS-1.0
80 * to TLS-1.2 (inclusive).
81 */
82 br_ssl_server_zero(cc);
83 br_ssl_engine_set_versions(&cc->eng, BR_TLS10, BR_TLS12);
84
85 /*
86 * Set suites and elliptic curve implementation (for ECDHE).
87 */
88 br_ssl_engine_set_suites(&cc->eng, suites,
89 (sizeof suites) / (sizeof suites[0]));
90 br_ssl_engine_set_ec(&cc->eng, &br_ec_prime_i31);
91
92 /*
93 * Set the "server policy": handler for the certificate chain
94 * and private key operations.
95 */
96 br_ssl_server_set_single_rsa(cc, chain, chain_len, sk,
97 BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN,
98 br_rsa_i31_private, br_rsa_i31_pkcs1_sign);
99
100 /*
101 * Set supported hash functions.
102 */
103 for (id = br_md5_ID; id <= br_sha512_ID; id ++) {
104 const br_hash_class *hc;
105
106 hc = hashes[id - 1];
107 br_ssl_engine_set_hash(&cc->eng, id, hc);
108 }
109
110 /*
111 * Set the PRF implementations.
112 */
113 br_ssl_engine_set_prf10(&cc->eng, &br_tls10_prf);
114 br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf);
115 br_ssl_engine_set_prf_sha384(&cc->eng, &br_tls12_sha384_prf);
116
117 /*
118 * Symmetric encryption. We use the "constant-time"
119 * implementations, which are the safest.
120 *
121 * On architectures detected as "64-bit", use the 64-bit
122 * versions (aes_ct64, ghash_ctmul64).
123 */
124 #if BR_64
125 br_ssl_engine_set_aes_cbc(&cc->eng,
126 &br_aes_ct64_cbcenc_vtable,
127 &br_aes_ct64_cbcdec_vtable);
128 br_ssl_engine_set_aes_ctr(&cc->eng,
129 &br_aes_ct64_ctr_vtable);
130 br_ssl_engine_set_ghash(&cc->eng,
131 &br_ghash_ctmul64);
132 #else
133 br_ssl_engine_set_aes_cbc(&cc->eng,
134 &br_aes_ct_cbcenc_vtable,
135 &br_aes_ct_cbcdec_vtable);
136 br_ssl_engine_set_aes_ctr(&cc->eng,
137 &br_aes_ct_ctr_vtable);
138 br_ssl_engine_set_ghash(&cc->eng,
139 &br_ghash_ctmul);
140 #endif
141 br_ssl_engine_set_des_cbc(&cc->eng,
142 &br_des_ct_cbcenc_vtable,
143 &br_des_ct_cbcdec_vtable);
144
145 /*
146 * Set the SSL record engines (CBC, GCM).
147 */
148 br_ssl_engine_set_cbc(&cc->eng,
149 &br_sslrec_in_cbc_vtable,
150 &br_sslrec_out_cbc_vtable);
151 br_ssl_engine_set_gcm(&cc->eng,
152 &br_sslrec_in_gcm_vtable,
153 &br_sslrec_out_gcm_vtable);
154 }