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 #include "third_party/blink/renderer/modules/crypto/crypto.h"
30
31 #include "crypto/random.h"
32 #include "third_party/blink/renderer/core/typed_arrays/dom_array_buffer_view.h"
33 #include "third_party/blink/renderer/platform/bindings/exception_state.h"
34
35 namespace blink {
36
37 namespace {
38
IsIntegerArray(DOMArrayBufferView * array)39 bool IsIntegerArray(DOMArrayBufferView* array) {
40 DOMArrayBufferView::ViewType type = array->GetType();
41 return type == DOMArrayBufferView::kTypeInt8 ||
42 type == DOMArrayBufferView::kTypeUint8 ||
43 type == DOMArrayBufferView::kTypeUint8Clamped ||
44 type == DOMArrayBufferView::kTypeInt16 ||
45 type == DOMArrayBufferView::kTypeUint16 ||
46 type == DOMArrayBufferView::kTypeInt32 ||
47 type == DOMArrayBufferView::kTypeUint32;
48 }
49
50 } // namespace
51
getRandomValues(NotShared<DOMArrayBufferView> array,ExceptionState & exception_state)52 NotShared<DOMArrayBufferView> Crypto::getRandomValues(
53 NotShared<DOMArrayBufferView> array,
54 ExceptionState& exception_state) {
55 DCHECK(array);
56 if (!IsIntegerArray(array.View())) {
57 exception_state.ThrowDOMException(
58 DOMExceptionCode::kTypeMismatchError,
59 String::Format("The provided ArrayBufferView is of type '%s', which is "
60 "not an integer array type.",
61 array.View()->TypeName()));
62 return NotShared<DOMArrayBufferView>(nullptr);
63 }
64 if (array.View()->byteLength() > 65536) {
65 exception_state.ThrowDOMException(
66 DOMExceptionCode::kQuotaExceededError,
67 String::Format("The ArrayBufferView's byte length (%zu) exceeds the "
68 "number of bytes of entropy available via this API "
69 "(65536).",
70 array.View()->byteLength()));
71 return NotShared<DOMArrayBufferView>(nullptr);
72 }
73 crypto::RandBytes(array.View()->BaseAddress(), array.View()->byteLength());
74 return array;
75 }
76
subtle()77 SubtleCrypto* Crypto::subtle() {
78 if (!subtle_crypto_)
79 subtle_crypto_ = MakeGarbageCollected<SubtleCrypto>();
80 return subtle_crypto_.Get();
81 }
82
Trace(Visitor * visitor) const83 void Crypto::Trace(Visitor* visitor) const {
84 visitor->Trace(subtle_crypto_);
85 ScriptWrappable::Trace(visitor);
86 }
87
88 } // namespace blink
89