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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_encrypter.h" | |
6 | |
7 #include <pk11pub.h> | |
8 | |
9 using base::StringPiece; | |
10 | |
11 namespace net { | |
12 | |
13 namespace { | |
14 | |
15 const size_t kKeySize = 32; | |
16 const size_t kNoncePrefixSize = 0; | |
17 | |
18 } // namespace | |
19 | |
20 ChaCha20Poly1305Encrypter::ChaCha20Poly1305Encrypter() | |
21 : AeadBaseEncrypter(CKM_NSS_CHACHA20_POLY1305, | |
22 kKeySize, | |
23 kAuthTagSize, | |
24 kNoncePrefixSize) { | |
25 static_assert(kKeySize <= kMaxKeySize, "key size too big"); | |
26 static_assert(kNoncePrefixSize <= kMaxNoncePrefixSize, | |
27 "nonce prefix size too big"); | |
28 } | |
29 | |
30 ChaCha20Poly1305Encrypter::~ChaCha20Poly1305Encrypter() {} | |
31 | |
32 void ChaCha20Poly1305Encrypter::FillAeadParams(StringPiece nonce, | |
33 StringPiece associated_data, | |
34 size_t auth_tag_size, | |
35 AeadParams* aead_params) const { | |
36 aead_params->len = sizeof(aead_params->data.nss_aead_params); | |
37 CK_NSS_AEAD_PARAMS* nss_aead_params = &aead_params->data.nss_aead_params; | |
38 nss_aead_params->pIv = | |
39 reinterpret_cast<CK_BYTE*>(const_cast<char*>(nonce.data())); | |
40 nss_aead_params->ulIvLen = nonce.size(); | |
41 nss_aead_params->pAAD = | |
42 reinterpret_cast<CK_BYTE*>(const_cast<char*>(associated_data.data())); | |
43 nss_aead_params->ulAADLen = associated_data.size(); | |
44 nss_aead_params->ulTagLen = auth_tag_size; | |
45 } | |
46 | |
47 } // namespace net | |
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