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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 "third_party/blink/renderer/modules/crypto/crypto.h"
#include "crypto/random.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_array_buffer_view.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
namespace blink {
namespace {
bool IsIntegerArray(NotShared<DOMArrayBufferView> array) {
DOMArrayBufferView::ViewType type = array->GetType();
return type == DOMArrayBufferView::kTypeInt8 ||
type == DOMArrayBufferView::kTypeUint8 ||
type == DOMArrayBufferView::kTypeUint8Clamped ||
type == DOMArrayBufferView::kTypeInt16 ||
type == DOMArrayBufferView::kTypeUint16 ||
type == DOMArrayBufferView::kTypeInt32 ||
type == DOMArrayBufferView::kTypeUint32;
}
} // namespace
NotShared<DOMArrayBufferView> Crypto::getRandomValues(
NotShared<DOMArrayBufferView> array,
ExceptionState& exception_state) {
DCHECK(array);
if (!IsIntegerArray(array)) {
exception_state.ThrowDOMException(
DOMExceptionCode::kTypeMismatchError,
String::Format("The provided ArrayBufferView is of type '%s', which is "
"not an integer array type.",
array->TypeName()));
return NotShared<DOMArrayBufferView>(nullptr);
}
if (array->byteLength() > 65536) {
exception_state.ThrowDOMException(
DOMExceptionCode::kQuotaExceededError,
String::Format("The ArrayBufferView's byte length (%zu) exceeds the "
"number of bytes of entropy available via this API "
"(65536).",
array->byteLength()));
return NotShared<DOMArrayBufferView>(nullptr);
}
crypto::RandBytes(array->BaseAddress(), array->byteLength());
return array;
}
SubtleCrypto* Crypto::subtle() {
if (!subtle_crypto_)
subtle_crypto_ = MakeGarbageCollected<SubtleCrypto>();
return subtle_crypto_.Get();
}
void Crypto::Trace(Visitor* visitor) const {
visitor->Trace(subtle_crypto_);
ScriptWrappable::Trace(visitor);
}
} // namespace blink
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