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1 // Copyright 2014 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/chacha20_poly1305_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 = 32; | |
15 const size_t kNoncePrefixSize = 0; | |
16 | |
17 } // namespace | |
18 | |
19 // QUIC currently uses the draft-agl-tls-chacha20poly1305-04 ChaCha20-Poly1305 | |
20 // construction rather than RFC 7539. | |
21 ChaCha20Poly1305Decrypter::ChaCha20Poly1305Decrypter() | |
22 : AeadBaseDecrypter(EVP_aead_chacha20_poly1305_old(), | |
23 kKeySize, | |
24 kAuthTagSize, | |
25 kNoncePrefixSize) { | |
26 static_assert(kKeySize <= kMaxKeySize, "key size too big"); | |
27 static_assert(kNoncePrefixSize <= kMaxNoncePrefixSize, | |
28 "nonce prefix size too big"); | |
29 } | |
30 | |
31 ChaCha20Poly1305Decrypter::~ChaCha20Poly1305Decrypter() {} | |
32 | |
33 const char* ChaCha20Poly1305Decrypter::cipher_name() const { | |
34 return TLS1_TXT_ECDHE_RSA_WITH_CHACHA20_POLY1305_OLD; | |
35 } | |
36 | |
37 uint32_t ChaCha20Poly1305Decrypter::cipher_id() const { | |
38 return TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305_OLD; | |
39 } | |
40 | |
41 } // namespace net | |
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