http://www.bouncycastle.org/java.html: 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 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.jcajce.provider.asymmetric.util;

import java.io.IOException;
import java.math.BigInteger;


Deprecated:No longer used
/**
 * @deprecated No longer used
 */
public interface DSAEncoder
{
    byte[] encode(BigInteger r, BigInteger s)
        throws IOException;

    BigInteger[] decode(byte[] sig)
        throws IOException;
}