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
38 namespace blink {
39
40 namespace {
41
isIntegerArray(ArrayBufferView * array)42 bool 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
Crypto()56 Crypto::Crypto()
57 {
58 }
59
getRandomValues(ArrayBufferView * array,ExceptionState & exceptionState)60 void 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
subtle()77 SubtleCrypto* Crypto::subtle()
78 {
79 if (!m_subtleCrypto)
80 m_subtleCrypto = SubtleCrypto::create();
81 return m_subtleCrypto.get();
82 }
83
trace(Visitor * visitor)84 void Crypto::trace(Visitor* visitor)
85 {
86 visitor->trace(m_subtleCrypto);
87 }
88
89 }
90