1a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 2a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 3a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// found in the LICENSE file. 4a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 5a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "net/quic/crypto/chacha20_poly1305_decrypter.h" 6a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 7a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include <pk11pub.h> 8a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 9a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "base/logging.h" 10a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 11a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)using base::StringPiece; 12a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 13a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)namespace net { 14a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 15a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)namespace { 16a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 17a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)const size_t kKeySize = 32; 18a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)const size_t kNoncePrefixSize = 0; 19a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 20a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} // namespace 21a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 22a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#if defined(USE_NSS) 23a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 24a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// System NSS doesn't support ChaCha20+Poly1305 yet. 25a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 26a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)ChaCha20Poly1305Decrypter::ChaCha20Poly1305Decrypter() 27a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) : AeadBaseDecrypter(CKM_INVALID_MECHANISM, NULL, kKeySize, 28a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) kAuthTagSize, kNoncePrefixSize) { 29a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NOTIMPLEMENTED(); 30a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 31a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 32a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)ChaCha20Poly1305Decrypter::~ChaCha20Poly1305Decrypter() {} 33a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 34a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// static 35a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)bool ChaCha20Poly1305Decrypter::IsSupported() { 36a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return false; 37a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 38a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 39a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)void ChaCha20Poly1305Decrypter::FillAeadParams(StringPiece nonce, 40a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) StringPiece associated_data, 41a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) size_t auth_tag_size, 42a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AeadParams* aead_params) const { 43a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NOTIMPLEMENTED(); 44a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 45a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 46a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#else // defined(USE_NSS) 47a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 48a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)ChaCha20Poly1305Decrypter::ChaCha20Poly1305Decrypter() 49a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) : AeadBaseDecrypter(CKM_NSS_CHACHA20_POLY1305, PK11_Decrypt, kKeySize, 50a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) kAuthTagSize, kNoncePrefixSize) { 51a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) COMPILE_ASSERT(kKeySize <= kMaxKeySize, key_size_too_big); 52a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) COMPILE_ASSERT(kNoncePrefixSize <= kMaxNoncePrefixSize, 53a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) nonce_prefix_size_too_big); 54a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 55a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 56a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)ChaCha20Poly1305Decrypter::~ChaCha20Poly1305Decrypter() {} 57a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 58a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// static 59a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)bool ChaCha20Poly1305Decrypter::IsSupported() { 6023730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) return true; 61a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 62a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 63a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)void ChaCha20Poly1305Decrypter::FillAeadParams(StringPiece nonce, 64a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) StringPiece associated_data, 65a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) size_t auth_tag_size, 66a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AeadParams* aead_params) const { 6723730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) aead_params->len = sizeof(aead_params->data.nss_aead_params); 6823730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) CK_NSS_AEAD_PARAMS* nss_aead_params = &aead_params->data.nss_aead_params; 6923730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) nss_aead_params->pIv = 7023730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) reinterpret_cast<CK_BYTE*>(const_cast<char*>(nonce.data())); 7123730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) nss_aead_params->ulIvLen = nonce.size(); 7223730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) nss_aead_params->pAAD = 7323730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) reinterpret_cast<CK_BYTE*>(const_cast<char*>(associated_data.data())); 7423730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) nss_aead_params->ulAADLen = associated_data.size(); 7523730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) nss_aead_params->ulTagLen = auth_tag_size; 76a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 77a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 78a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif // defined(USE_NSS) 79a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 80a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} // namespace net 81