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_ec(br_ssl_server_context *cc, 30 const br_x509_certificate *chain, size_t chain_len, 31 unsigned cert_issuer_key_type, const br_ec_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 * -- ChaCha20+Poly1305 is better than AES/GCM (faster, smaller). 42 * -- GCM is better than CCM and CBC. CCM is better than CBC. 43 * -- CCM is better than CCM_8. 44 * -- AES-128 is preferred over AES-256 (AES-128 is already 45 * strong enough, and AES-256 is 40% more expensive). 46 * 47 * Note that for ECDH suites, the list will be automatically 48 * filtered based on the issuing CA key type. 49 */ 50 static const uint16_t suites[] = { 51 BR_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, 52 BR_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 53 BR_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, 54 BR_TLS_ECDHE_ECDSA_WITH_AES_128_CCM, 55 BR_TLS_ECDHE_ECDSA_WITH_AES_256_CCM, 56 BR_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8, 57 BR_TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8, 58 BR_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, 59 BR_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, 60 BR_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, 61 BR_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, 62 BR_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, 63 BR_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, 64 BR_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, 65 BR_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, 66 BR_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, 67 BR_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, 68 BR_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, 69 BR_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, 70 BR_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, 71 BR_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, 72 BR_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, 73 BR_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, 74 BR_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, 75 BR_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, 76 BR_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA 77 }; 78 79 /* 80 * All hash functions are activated. 81 * Note: the X.509 validation engine will nonetheless refuse to 82 * validate signatures that use MD5 as hash function. 83 */ 84 static const br_hash_class *hashes[] = { 85 &br_md5_vtable, 86 &br_sha1_vtable, 87 &br_sha224_vtable, 88 &br_sha256_vtable, 89 &br_sha384_vtable, 90 &br_sha512_vtable 91 }; 92 93 int id; 94 95 /* 96 * Reset server context and set supported versions from TLS-1.0 97 * to TLS-1.2 (inclusive). 98 */ 99 br_ssl_server_zero(cc); 100 br_ssl_engine_set_versions(&cc->eng, BR_TLS10, BR_TLS12); 101 102 /* 103 * Set suites and elliptic curve implementation (for ECDHE). 104 */ 105 br_ssl_engine_set_suites(&cc->eng, suites, 106 (sizeof suites) / (sizeof suites[0])); 107 br_ssl_engine_set_default_ec(&cc->eng); 108 109 /* 110 * Set the "server policy": handler for the certificate chain 111 * and private key operations. 112 */ 113 br_ssl_server_set_single_ec(cc, chain, chain_len, sk, 114 BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN, 115 cert_issuer_key_type, 116 br_ssl_engine_get_ec(&cc->eng), 117 #if BR_LOMUL 118 br_ecdsa_i15_sign_asn1 119 #else 120 br_ecdsa_i31_sign_asn1 121 #endif 122 ); 123 124 /* 125 * Set supported hash functions. 126 */ 127 for (id = br_md5_ID; id <= br_sha512_ID; id ++) { 128 const br_hash_class *hc; 129 130 hc = hashes[id - 1]; 131 br_ssl_engine_set_hash(&cc->eng, id, hc); 132 } 133 134 /* 135 * Set the PRF implementations. 136 */ 137 br_ssl_engine_set_prf10(&cc->eng, &br_tls10_prf); 138 br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); 139 br_ssl_engine_set_prf_sha384(&cc->eng, &br_tls12_sha384_prf); 140 141 /* 142 * Symmetric encryption. 143 */ 144 br_ssl_engine_set_default_aes_cbc(&cc->eng); 145 br_ssl_engine_set_default_aes_ccm(&cc->eng); 146 br_ssl_engine_set_default_aes_gcm(&cc->eng); 147 br_ssl_engine_set_default_des_cbc(&cc->eng); 148 br_ssl_engine_set_default_chapol(&cc->eng); 149 } 150