YarrowPseudoRandom.cxx
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上传日期:2013-07-25
资源大小:3048k
文件大小:4k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
C/C++
- #ifndef NO_YARROW
- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- #include "CryptoRandom.hxx"
- #include "YarrowPseudoRandom.hxx"
- #include "cpLog.h"
- extern "C" {
- int yarrow_verbose = 0;
- };
- unsigned char YarrowPseudoRandom::entropyBuf[ENTROPY_BUF_SIZE];
- YarrowPseudoRandom* YarrowPseudoRandom::yarrowInst = 0;
- YarrowPseudoRandom::YarrowPseudoRandom()
- {
- unsigned devrandom;
- CryptoRandom crypto;
- int len;
- len = crypto.getRandom(entropyBuf, ENTROPY_BUF_SIZE);
- if (len == ENTROPY_BUF_SIZE)
- {
- cpLog(LOG_DEBUG, "New seed value generated");
- }
- else
- {
- cpLog(LOG_DEBUG, "Failed to generate new seed value");
- }
- //initialize yarrow
- int ret = Yarrow_Init(&yarrow, NULL);
- if (ret != YARROW_OK && ret != YARROW_NOT_SEEDED)
- {
- cpLog(LOG_DEBUG, "Yarrow not initialized");
- //throw exception.
- }
- else
- {
- cpLog(LOG_DEBUG, "Yarrow initialized successfully");
- Yarrow_Input(&yarrow, devrandom, entropyBuf, sizeof(entropyBuf), sizeof(entropyBuf)*3);
- }
- }
- YarrowPseudoRandom::~YarrowPseudoRandom()
- {
- }
- YarrowPseudoRandom* YarrowPseudoRandom::instance()
- {
- if (yarrowInst == 0)
- {
- yarrowInst = new YarrowPseudoRandom;
- }
- return yarrowInst;
- }
- int YarrowPseudoRandom::getRandom(unsigned char* buf, int num)
- {
- int ret = Yarrow_Output(&yarrow, buf, num);
- return ret;
- }
- #endif