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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "net/quic/crypto/aes_128_gcm_12_decrypter.h" | |
| 6 | |
| 7 #include <openssl/evp.h> | |
| 8 #include <openssl/tls1.h> | |
| 9 | |
| 10 namespace net { | |
| 11 | |
| 12 namespace { | |
| 13 | |
| 14 const size_t kKeySize = 16; | |
| 15 const size_t kNoncePrefixSize = 4; | |
| 16 | |
| 17 } // namespace | |
| 18 | |
| 19 Aes128Gcm12Decrypter::Aes128Gcm12Decrypter() | |
| 20 : AeadBaseDecrypter(EVP_aead_aes_128_gcm(), | |
| 21 kKeySize, | |
| 22 kAuthTagSize, | |
| 23 kNoncePrefixSize) { | |
| 24 static_assert(kKeySize <= kMaxKeySize, "key size too big"); | |
| 25 static_assert(kNoncePrefixSize <= kMaxNoncePrefixSize, | |
| 26 "nonce prefix size too big"); | |
| 27 } | |
| 28 | |
| 29 Aes128Gcm12Decrypter::~Aes128Gcm12Decrypter() {} | |
| 30 | |
| 31 const char* Aes128Gcm12Decrypter::cipher_name() const { | |
| 32 return TLS1_TXT_ECDHE_RSA_WITH_AES_128_GCM_SHA256; | |
| 33 } | |
| 34 | |
| 35 uint32_t Aes128Gcm12Decrypter::cipher_id() const { | |
| 36 // This OpenSSL macro has the value 0x0300C02F. The two most significant bytes | |
| 37 // 0x0300 are OpenSSL specific and are NOT part of the TLS CipherSuite value | |
| 38 // for TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256. | |
| 39 return TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256; | |
| 40 } | |
| 41 | |
| 42 } // namespace net | |
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