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/*
* Copyright (C) 2011 Google 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:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 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.
* 3. Neither the name of Google, Inc. ("Google") nor the names of
* 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
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "modules/crypto/Crypto.h"
#include "bindings/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "wtf/ArrayBufferView.h"
#include "wtf/CryptographicallyRandomNumber.h"
namespace WebCore {
namespace {
bool isIntegerArray(ArrayBufferView* array)
{
ArrayBufferView::ViewType type = array->getType();
return type == ArrayBufferView::TypeInt8
|| type == ArrayBufferView::TypeUint8
|| type == ArrayBufferView::TypeUint8Clamped
|| type == ArrayBufferView::TypeInt16
|| type == ArrayBufferView::TypeUint16
|| type == ArrayBufferView::TypeInt32
|| type == ArrayBufferView::TypeUint32;
}
}
Crypto::Crypto()
{
ScriptWrappable::init(this);
}
// Note: This implementation must be thread-safe, as it is used by workers.
void Crypto::getRandomValues(ArrayBufferView* array, ExceptionState& exceptionState)
{
if (!array) {
exceptionState.throwDOMException(TypeMismatchError, "The provided ArrayBufferView is null.");
return;
}
if (!isIntegerArray(array)) {
exceptionState.throwDOMException(TypeMismatchError, String::format("The provided ArrayBufferView is of type '%s', which is not an integer array type.", array->typeName()));
return;
}
if (array->byteLength() > 65536) {
exceptionState.throwDOMException(QuotaExceededError, String::format("The ArrayBufferView's byte length (%u) exceeds the number of bytes of entropy available via this API (65536).", array->byteLength()));
return;
}
cryptographicallyRandomValues(array->baseAddress(), array->byteLength());
}
SubtleCrypto* Crypto::subtle()
{
if (!m_subtleCrypto)
m_subtleCrypto = SubtleCrypto::create();
return m_subtleCrypto.get();
}
}
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