Source/WebCore/crypto/parameters/CryptoAlgorithmAesCtrParams.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
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 * 1. Redistributions of source code must retain the above copyright
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 * 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
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#pragma once

#include "BufferSource.h"
#include "CryptoAlgorithmParameters.h"
#include <wtf/Vector.h>

#if ENABLE(WEB_CRYPTO)

namespace WebCore {

class CryptoAlgorithmAesCtrParams final : public CryptoAlgorithmParameters {
public:
    BufferSource counter;
    size_t length;

    Class parametersClass() const final { return Class::AesCtrParams; }

    const Vector<uint8_t>& counterVector() const
    {
        if (!m_counterVector.isEmpty() || !counter.length())
            return m_counterVector;

        m_counterVector.append(counter.data(), counter.length());
        return m_counterVector;
    }

    CryptoAlgorithmAesCtrParams isolatedCopy() const
    {
        CryptoAlgorithmAesCtrParams result;
        result.identifier = identifier;
        result.m_counterVector = counterVector();
        result.length = length;

        return result;
    }

private:
    mutable Vector<uint8_t> m_counterVector;
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_CRYPTO_ALGORITHM_PARAMETERS(AesCtrParams)

#endif // ENABLE(WEB_CRYPTO)