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The FIPS 140-3 Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms certified to FIPS 140-3 level 1. This jar contains JCE provider and low-level API for the BC-FJA version 2.0.0, FIPS Certificate #4743. Please see certificate for certified platform details.

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/***************************************************************/
/******    DO NOT EDIT THIS CLASS bc-java SOURCE FILE     ******/
/***************************************************************/
package org.bouncycastle.crypto.fips;

import java.math.BigInteger;
import java.security.SecureRandom;

class RandomDsaKCalculator
    implements DsaKCalculator
{
    private static final BigInteger ZERO = BigInteger.valueOf(0);

    private BigInteger q;
    private SecureRandom random;

    public boolean isDeterministic()
    {
        return false;
    }

    public void init(BigInteger n, SecureRandom random)
    {
        this.q = n;
        this.random = random;
    }

    public void init(BigInteger n, BigInteger d, byte[] message)
    {
        throw new IllegalStateException("Operation not supported");
    }

    public BigInteger nextK()
    {
        int qBitLength = q.bitLength();

        BigInteger k;
        do
        {
            k = new BigInteger(qBitLength, random);
        }
        while (k.equals(ZERO) || k.compareTo(q) >= 0);

        return k;
    }
}