Crypto.cpp   [plain text]

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 * Copyright (C) 2013 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:
 *
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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 "SubtleCrypto.h"
#include <JavaScriptCore/ArrayBufferView.h>
#include <wtf/CryptographicallyRandomNumber.h>

#if OS(DARWIN)
#include "CommonCryptoUtilities.h"
#endif

namespace WebCore {

Crypto::Crypto(ScriptExecutionContext* context)
    : ContextDestructionObserver(context)
#if ENABLE(WEB_CRYPTO)
    , m_subtle(SubtleCrypto::create(context))
#endif
{
}

Crypto::~Crypto() = default;

ExceptionOr<void> Crypto::getRandomValues(ArrayBufferView& array)
{
    if (!isInt(array.getType()))
        return Exception { TypeMismatchError };
    if (array.byteLength() > 65536)
        return Exception { QuotaExceededError };
#if OS(DARWIN)
    auto rc = CCRandomGenerateBytes(array.baseAddress(), array.byteLength());
    RELEASE_ASSERT(rc == kCCSuccess);
#else
    cryptographicallyRandomValues(array.baseAddress(), array.byteLength());
#endif
    return { };
}

#if ENABLE(WEB_CRYPTO)

SubtleCrypto& Crypto::subtle()
{
    return m_subtle;
}

#endif

}