third_party/WebKit/Source/wtf/CryptographicallyRandomNumber.h

   1 /*
   2  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
   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  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef WTF_CryptographicallyRandomNumber_h
  27 #define WTF_CryptographicallyRandomNumber_h
  28
  29 #include <stdint.h>
  30
  31 #include "wtf/WTFExport.h"
  32
  33 namespace WTF {
  34
  35 typedef void (*RandomNumberSource)(unsigned char*, size_t);
  36
  37 // The RandomNumberSource function MUST be threadsafe.
  38 WTF_EXPORT void setRandomSource(RandomNumberSource);
  39
  40 // These functions are threadsafe.
  41 WTF_EXPORT uint32_t cryptographicallyRandomNumber();
  42 WTF_EXPORT void cryptographicallyRandomValues(void* buffer, size_t length);
  43
  44 }
  45
  46 using WTF::cryptographicallyRandomNumber;
  47 using WTF::cryptographicallyRandomValues;
  48
  49 #endif