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/**
* Copyright 2003-2016 SSHTOOLS Limited. All Rights Reserved.
*
* For product documentation visit https://www.sshtools.com/
*
* This file is part of J2SSH Maverick.
*
* J2SSH Maverick is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* J2SSH Maverick 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with J2SSH Maverick. If not, see safePrimes = new ArrayList();
static {
safePrimes.add(group1);
safePrimes.add(group5);
safePrimes.add(group14);
safePrimes.add(group15);
safePrimes.add(group16);
safePrimes.add(group17);
safePrimes.add(group18);
}
/**
* get the biggest safe prime from the list that is <= maximumSize
*
* @param maximumSize
* @return BigInteger
*/
public static BigInteger getSafePrime(UnsignedInteger32 maximumSize) {
BigInteger prime = group1;
for(Iterator it = safePrimes.iterator(); it.hasNext(); ) {
BigInteger p = it.next();
int len = p.bitLength();
if(len > maximumSize.intValue()) {
break;
}
prime = p;
}
return prime;
}
}