1/* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Google, Inc. ("Google") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY GOOGLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 30#include "config.h" 31#include "modules/crypto/Crypto.h" 32 33#include "bindings/core/v8/ExceptionState.h" 34#include "core/dom/ExceptionCode.h" 35#include "wtf/ArrayBufferView.h" 36#include "wtf/CryptographicallyRandomNumber.h" 37 38namespace blink { 39 40namespace { 41 42bool isIntegerArray(ArrayBufferView* array) 43{ 44 ArrayBufferView::ViewType type = array->type(); 45 return type == ArrayBufferView::TypeInt8 46 || type == ArrayBufferView::TypeUint8 47 || type == ArrayBufferView::TypeUint8Clamped 48 || type == ArrayBufferView::TypeInt16 49 || type == ArrayBufferView::TypeUint16 50 || type == ArrayBufferView::TypeInt32 51 || type == ArrayBufferView::TypeUint32; 52} 53 54} 55 56Crypto::Crypto() 57{ 58} 59 60void Crypto::getRandomValues(ArrayBufferView* array, ExceptionState& exceptionState) 61{ 62 if (!array) { 63 exceptionState.throwDOMException(TypeMismatchError, "The provided ArrayBufferView is null."); 64 return; 65 } 66 if (!isIntegerArray(array)) { 67 exceptionState.throwDOMException(TypeMismatchError, String::format("The provided ArrayBufferView is of type '%s', which is not an integer array type.", array->typeName())); 68 return; 69 } 70 if (array->byteLength() > 65536) { 71 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())); 72 return; 73 } 74 cryptographicallyRandomValues(array->baseAddress(), array->byteLength()); 75} 76 77SubtleCrypto* Crypto::subtle() 78{ 79 if (!m_subtleCrypto) 80 m_subtleCrypto = SubtleCrypto::create(); 81 return m_subtleCrypto.get(); 82} 83 84void Crypto::trace(Visitor* visitor) 85{ 86 visitor->trace(m_subtleCrypto); 87} 88 89} 90