Source/WebCore/crypto/algorithms/CryptoAlgorithmHKDF.h

/*
 * Copyright (C) 2017 Apple Inc. All rights reserved.
 *
 * 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
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 */

#pragma once

#include "CryptoAlgorithm.h"

#if ENABLE(SUBTLE_CRYPTO)

namespace WebCore {

class CryptoAlgorithmHkdfParams;
class CryptoKeyRaw;

class CryptoAlgorithmHKDF final : public CryptoAlgorithm {
public:
    static constexpr const char* s_name = "HKDF";
    static constexpr CryptoAlgorithmIdentifier s_identifier = CryptoAlgorithmIdentifier::HKDF;
    static Ref<CryptoAlgorithm> create();

private:
    CryptoAlgorithmHKDF() = default;
    CryptoAlgorithmIdentifier identifier() const final;

    void deriveBits(std::unique_ptr<CryptoAlgorithmParameters>&&, Ref<CryptoKey>&&, size_t length, VectorCallback&&, ExceptionCallback&&, ScriptExecutionContext&, WorkQueue&) final;
    void importKey(CryptoKeyFormat, KeyData&&, const std::unique_ptr<CryptoAlgorithmParameters>&&, bool extractable, CryptoKeyUsageBitmap, KeyCallback&&, ExceptionCallback&&) final;
    ExceptionOr<size_t> getKeyLength(const CryptoAlgorithmParameters&) final;

    static ExceptionOr<Vector<uint8_t>> platformDeriveBits(CryptoAlgorithmHkdfParams&, const CryptoKeyRaw&, size_t);
};

} // namespace WebCore

#endif // ENABLE(SUBTLE_CRYPTO)