Source/WebCore/page/Crypto.cpp

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 * Copyright (C) 2013 Apple Inc. All rights reserved.
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 * are met:
 *
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 *     notice, this list of conditions and the following disclaimer. 
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 *     notice, this list of conditions and the following disclaimer in the
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 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY GOOGLE 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 OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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#include "config.h"
#include "Crypto.h"

#include "Document.h"
#include "ExceptionCode.h"
#include "SubtleCrypto.h"
#include <runtime/ArrayBufferView.h>
#include <wtf/CryptographicallyRandomNumber.h>

namespace WebCore {

Crypto::Crypto(Document& document)
    : ContextDestructionObserver(&document)
{
}

Crypto::~Crypto()
{
}

Document* Crypto::document() const
{
    return downcast<Document>(scriptExecutionContext());
}

void Crypto::getRandomValues(ArrayBufferView* array, ExceptionCode& ec)
{
    if (!array || !JSC::isInt(array->getType())) {
        ec = TYPE_MISMATCH_ERR;
        return;
    }
    if (array->byteLength() > 65536) {
        ec = QUOTA_EXCEEDED_ERR;
        return;
    }
    cryptographicallyRandomValues(array->baseAddress(), array->byteLength());
}

#if ENABLE(SUBTLE_CRYPTO)
SubtleCrypto* Crypto::subtle()
{
    ASSERT(isMainThread());
    if (!m_subtle)
        m_subtle = SubtleCrypto::create(*document());

    return m_subtle.get();
}
#endif

}