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