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.
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package org.bouncycastle.pqc.crypto.mceliece;

import org.bouncycastle.crypto.params.AsymmetricKeyParameter;


public class McElieceCCA2KeyParameters
    extends AsymmetricKeyParameter
{
    private String params;

    public McElieceCCA2KeyParameters(
        boolean isPrivate,
        String params)
    {
        super(isPrivate);
        this.params = params;
    }


    public String getDigest()
    {
        return params;
    }

}