| /* |
| * Copyright (C) 2017 Apple Inc. All rights reserved. |
| * Copyright (C) 2020 Sony Interactive Entertainment Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include "CryptoAlgorithm.h" |
| |
| #if ENABLE(WEB_CRYPTO) |
| |
| namespace WebCore { |
| |
| class CryptoAlgorithmAesCtrParams; |
| class CryptoKeyAES; |
| |
| class CryptoAlgorithmAES_CTR final : public CryptoAlgorithm { |
| public: |
| class CounterBlockHelper { |
| public: |
| CounterBlockHelper(const Vector<uint8_t>& counterVector, size_t counterLength); |
| |
| size_t countToOverflowSaturating() const; |
| Vector<uint8_t> counterVectorAfterOverflow() const; |
| |
| private: |
| // 128 bits integer with miminum required operators. |
| struct CounterBlockBits { |
| void set(); |
| bool all() const; |
| bool any() const; |
| |
| CounterBlockBits operator&(const CounterBlockBits&) const; |
| CounterBlockBits operator~() const; |
| CounterBlockBits& operator <<=(unsigned); |
| CounterBlockBits& operator &=(const CounterBlockBits&); |
| |
| uint64_t m_hi { 0 }; |
| uint64_t m_lo { 0 }; |
| }; |
| |
| CounterBlockBits m_bits; |
| const size_t m_counterLength; |
| }; |
| |
| static constexpr const char* s_name = "AES-CTR"; |
| static constexpr CryptoAlgorithmIdentifier s_identifier = CryptoAlgorithmIdentifier::AES_CTR; |
| static Ref<CryptoAlgorithm> create(); |
| |
| private: |
| CryptoAlgorithmAES_CTR() = default; |
| CryptoAlgorithmIdentifier identifier() const final; |
| |
| void encrypt(const CryptoAlgorithmParameters&, Ref<CryptoKey>&&, Vector<uint8_t>&&, VectorCallback&&, ExceptionCallback&&, ScriptExecutionContext&, WorkQueue&) final; |
| void decrypt(const CryptoAlgorithmParameters&, Ref<CryptoKey>&&, Vector<uint8_t>&&, VectorCallback&&, ExceptionCallback&&, ScriptExecutionContext&, WorkQueue&) final; |
| void generateKey(const CryptoAlgorithmParameters&, bool extractable, CryptoKeyUsageBitmap, KeyOrKeyPairCallback&&, ExceptionCallback&&, ScriptExecutionContext&) final; |
| void importKey(CryptoKeyFormat, KeyData&&, const CryptoAlgorithmParameters&, bool extractable, CryptoKeyUsageBitmap, KeyCallback&&, ExceptionCallback&&) final; |
| void exportKey(CryptoKeyFormat, Ref<CryptoKey>&&, KeyDataCallback&&, ExceptionCallback&&) final; |
| ExceptionOr<size_t> getKeyLength(const CryptoAlgorithmParameters&) final; |
| |
| static ExceptionOr<Vector<uint8_t>> platformEncrypt(const CryptoAlgorithmAesCtrParams&, const CryptoKeyAES&, const Vector<uint8_t>&); |
| static ExceptionOr<Vector<uint8_t>> platformDecrypt(const CryptoAlgorithmAesCtrParams&, const CryptoKeyAES&, const Vector<uint8_t>&); |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(WEB_CRYPTO) |