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 "Crypto.h"
32
33#include "ExceptionCode.h"
34#include "ScriptWrappableInlines.h"
35#include <wtf/ArrayBufferView.h>
36#include <wtf/CryptographicallyRandomNumber.h>
37
38namespace WebCore {
39
40namespace {
41
42bool isIntegerArray(ArrayBufferView* array)
43{
44    ArrayBufferView::ViewType type = array->getType();
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, ExceptionCode& ec)
61{
62    if (!array || !isIntegerArray(array)) {
63        ec = TYPE_MISMATCH_ERR;
64        return;
65    }
66    if (array->byteLength() > 65536) {
67        ec = QUOTA_EXCEEDED_ERR;
68        return;
69    }
70    cryptographicallyRandomValues(array->baseAddress(), array->byteLength());
71}
72
73}
74