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59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
// nonce.cpp
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/**
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* Copyright (C) 2009 10gen Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "stdafx.h"
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#include "nonce.h"
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namespace mongo {
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extern "C" int do_md5_test(void);
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Security::Security(){
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#if defined(__linux__)
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devrandom = new ifstream("/dev/urandom", ios::binary|ios::in);
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massert( "can't open dev/urandom", devrandom->is_open() );
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#elif defined(_WIN32)
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srand(curTimeMicros());
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#else
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srandomdev();
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#endif
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assert( sizeof(nonce) == 8 );
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#ifndef NDEBUG
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if ( do_md5_test() )
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massert("md5 unit test fails", false);
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#endif
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}
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nonce Security::getNonce(){
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nonce n;
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#if defined(__linux__)
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devrandom->read((char*)&n, sizeof(n));
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massert("devrandom failed", !devrandom->fail());
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#elif defined(_WIN32)
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n = (((unsigned long long)rand())<<32) | rand();
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#else
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n = (((unsigned long long)random())<<32) | random();
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#endif
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return n;
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}
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Security security;
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} // namespace mongo
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