Source/bindings/v8/custom/V8CryptoCustom.cpp

/*
 * Copyright (C) 2012 Google 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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 *     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 CONSEQUENTIAL DAMAGES
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#include "config.h"
#include "V8Crypto.h"

#include "bindings/v8/ExceptionMessages.h"
#include "bindings/v8/ExceptionState.h"
#include "bindings/v8/V8Binding.h"
#include "bindings/v8/V8Utilities.h"
#include "bindings/v8/custom/V8ArrayBufferViewCustom.h"
#include "core/dom/ExceptionCode.h"
#include "modules/crypto/Crypto.h"
#include "wtf/ArrayBufferView.h"

namespace WebCore {

// This custom binding is shared by V8WorkerCrypto. As such:
//   * Do not call V8Crypto::toNative()
//   * Must be threadsafe
void V8Crypto::getRandomValuesMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
{
    if (info.Length() < 1) {
        throwTypeError(ExceptionMessages::failedToExecute("getRandomValues", "Crypto", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
        return;
    }

    v8::Handle<v8::Value> buffer = info[0];
    if (!V8ArrayBufferView::hasInstance(buffer, info.GetIsolate(), worldType(info.GetIsolate()))) {
        throwTypeError("First argument is not an ArrayBufferView", info.GetIsolate());
        return;
    }

    ArrayBufferView* arrayBufferView = V8ArrayBufferView::toNative(v8::Handle<v8::Object>::Cast(buffer));
    ASSERT(arrayBufferView);

    ExceptionState exceptionState(info.Holder(), info.GetIsolate());
    Crypto::getRandomValues(arrayBufferView, exceptionState);

    if (exceptionState.throwIfNeeded())
        return;

    v8SetReturnValue(info, buffer);
}

} // namespace WebCore