| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "net/quic/crypto/chacha20_poly1305_encrypter.h" |
| |
| #include <pk11pub.h> |
| |
| #include "base/logging.h" |
| |
| using base::StringPiece; |
| |
| namespace net { |
| |
| namespace { |
| |
| const size_t kKeySize = 32; |
| const size_t kNoncePrefixSize = 0; |
| |
| } // namespace |
| |
| #if defined(USE_NSS) |
| |
| // System NSS doesn't support ChaCha20+Poly1305 yet. |
| |
| ChaCha20Poly1305Encrypter::ChaCha20Poly1305Encrypter() |
| : AeadBaseEncrypter(CKM_INVALID_MECHANISM, nullptr, kKeySize, |
| kAuthTagSize, kNoncePrefixSize) { |
| NOTIMPLEMENTED(); |
| } |
| |
| ChaCha20Poly1305Encrypter::~ChaCha20Poly1305Encrypter() {} |
| |
| // static |
| bool ChaCha20Poly1305Encrypter::IsSupported() { |
| return false; |
| } |
| |
| void ChaCha20Poly1305Encrypter::FillAeadParams(StringPiece nonce, |
| StringPiece associated_data, |
| size_t auth_tag_size, |
| AeadParams* aead_params) const { |
| NOTIMPLEMENTED(); |
| } |
| |
| #else // defined(USE_NSS) |
| |
| ChaCha20Poly1305Encrypter::ChaCha20Poly1305Encrypter() |
| : AeadBaseEncrypter(CKM_NSS_CHACHA20_POLY1305, PK11_Encrypt, kKeySize, |
| kAuthTagSize, kNoncePrefixSize) { |
| COMPILE_ASSERT(kKeySize <= kMaxKeySize, key_size_too_big); |
| COMPILE_ASSERT(kNoncePrefixSize <= kMaxNoncePrefixSize, |
| nonce_prefix_size_too_big); |
| } |
| |
| ChaCha20Poly1305Encrypter::~ChaCha20Poly1305Encrypter() {} |
| |
| // static |
| bool ChaCha20Poly1305Encrypter::IsSupported() { |
| return true; |
| } |
| |
| void ChaCha20Poly1305Encrypter::FillAeadParams(StringPiece nonce, |
| StringPiece associated_data, |
| size_t auth_tag_size, |
| AeadParams* aead_params) const { |
| aead_params->len = sizeof(aead_params->data.nss_aead_params); |
| CK_NSS_AEAD_PARAMS* nss_aead_params = &aead_params->data.nss_aead_params; |
| nss_aead_params->pIv = |
| reinterpret_cast<CK_BYTE*>(const_cast<char*>(nonce.data())); |
| nss_aead_params->ulIvLen = nonce.size(); |
| nss_aead_params->pAAD = |
| reinterpret_cast<CK_BYTE*>(const_cast<char*>(associated_data.data())); |
| nss_aead_params->ulAADLen = associated_data.size(); |
| nss_aead_params->ulTagLen = auth_tag_size; |
| } |
| |
| #endif // defined(USE_NSS) |
| |
| } // namespace net |