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      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 "Uint8Array.h"
     35 #include <wtf/CryptographicallyRandomNumber.h>
     36 
     37 namespace WebCore {
     38 
     39 namespace {
     40 
     41 bool isIntegerArray(ArrayBufferView* array)
     42 {
     43     return array->isByteArray()
     44         || array->isUnsignedByteArray()
     45         || array->isShortArray()
     46         || array->isUnsignedShortArray()
     47         || array->isIntArray()
     48         || array->isUnsignedIntArray();
     49 }
     50 
     51 }
     52 
     53 Crypto::Crypto()
     54 {
     55 }
     56 
     57 void Crypto::getRandomValues(ArrayBufferView* array, ExceptionCode& ec)
     58 {
     59 #if USE(OS_RANDOMNESS)
     60     if (!array || !isIntegerArray(array)) {
     61         ec = TYPE_MISMATCH_ERR;
     62         return;
     63     }
     64     cryptographicallyRandomValues(array->baseAddress(), array->byteLength());
     65 #else
     66     ASSERT_UNUSED(array, array);
     67     ec = NOT_SUPPORTED_ERR;
     68 #endif
     69 }
     70 
     71 }
     72