third_party/WebKit/Source/wtf/CryptographicallyRandomNumber.cpp

/*
 * Copyright (c) 1996, David Mazieres <dm@uun.org>
 * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "config.h"
#include "wtf/CryptographicallyRandomNumber.h"

namespace WTF {

static RandomNumberSource sourceFunction;

void setRandomSource(RandomNumberSource source)
{
    sourceFunction = source;
}

uint32_t cryptographicallyRandomNumber()
{
    uint32_t result;
    cryptographicallyRandomValues(&result, sizeof(result));
    return result;
}

void cryptographicallyRandomValues(void* buffer, size_t length)
{
    (*sourceFunction)(reinterpret_cast<unsigned char*>(buffer), length);
}

}