Source/WebCore/crypto/parameters/CryptoAlgorithmRsaOaepParams.h

/*
 * Copyright (C) 2016 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * 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 CryptoAlgorithmRsaOaepParams final : public CryptoAlgorithmParameters {
public:
    // Use labelVector() instead of label. The label will be gone once labelVector() is called.
    mutable std::optional<BufferSource::VariantType> label;

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

    const Vector<uint8_t>& labelVector() const
    {
        if (!m_labelVector.isEmpty() || !label)
            return m_labelVector;

        BufferSource labelBuffer = WTFMove(*label);
        label = std::nullopt;
        if (!labelBuffer.length())
            return m_labelVector;

        m_labelVector.append(labelBuffer.data(), labelBuffer.length());
        return m_labelVector;
    }

    CryptoAlgorithmRsaOaepParams isolatedCopy() const
    {
        CryptoAlgorithmRsaOaepParams result;
        result.identifier = identifier;
        result.m_labelVector = labelVector();

        return result;
    }

private:
    mutable Vector<uint8_t> m_labelVector;
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_CRYPTO_ALGORITHM_PARAMETERS(RsaOaepParams)

#endif // ENABLE(WEB_CRYPTO)