mirror of
https://github.com/darlinghq/darling-WTF.git
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61 lines
2.2 KiB
C++
61 lines
2.2 KiB
C++
/*
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* Copyright (C) 2011 Google Inc.
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* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY GOOGLE, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <wtf/Noncopyable.h>
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#include <wtf/StdLibExtras.h>
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namespace WTF {
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class RandomDevice {
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WTF_MAKE_NONCOPYABLE(RandomDevice);
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public:
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#if OS(DARWIN) || OS(WINDOWS)
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RandomDevice() = default;
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#else
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RandomDevice();
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~RandomDevice();
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#endif
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// This function attempts to fill buffer with randomness from the operating
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// system. Rather than calling this function directly, consider calling
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// cryptographicallyRandomNumber or cryptographicallyRandomValues.
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void cryptographicallyRandomValues(unsigned char* buffer, size_t length);
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private:
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#if OS(DARWIN) || OS(WINDOWS)
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#elif OS(UNIX)
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int m_fd { -1 };
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#else
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#error "This configuration doesn't have a strong source of randomness."
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// WARNING: When adding new sources of OS randomness, the randomness must
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// be of cryptographic quality!
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#endif
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};
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}
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