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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 and up.
package org.bouncycastle.util.test;
import org.bouncycastle.util.BigIntegers;
/**
* A fixed secure random designed to return data for someone needing to create a single BigInteger.
*/
public class TestRandomBigInteger
extends FixedSecureRandom
{
/**
* Constructor from a base 10 represention of a BigInteger.
*
* @param encoding a base 10 represention of a BigInteger.
*/
public TestRandomBigInteger(String encoding)
{
this(encoding, 10);
}
/**
* Constructor from a base radix represention of a BigInteger.
*
* @param encoding a String BigInteger of base radix.
* @param radix the radix to use.
*/
public TestRandomBigInteger(String encoding, int radix)
{
super(new FixedSecureRandom.Source[] { new FixedSecureRandom.BigInteger(BigIntegers.asUnsignedByteArray(new java.math.BigInteger(encoding, radix))) });
}
/**
* Constructor based on a byte array.
*
* @param encoding a 2's complement representation of the BigInteger.
*/
public TestRandomBigInteger(byte[] encoding)
{
super(new FixedSecureRandom.Source[] { new FixedSecureRandom.BigInteger(encoding) });
}
/**
* Constructor which ensures encoding will produce a BigInteger from a request from the passed in bitLength.
*
* @param bitLength bit length for the BigInteger data request.
* @param encoding bytes making up the encoding.
*/
public TestRandomBigInteger(int bitLength, byte[] encoding)
{
super(new FixedSecureRandom.Source[] { new FixedSecureRandom.BigInteger(bitLength, encoding) });
}
}