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package org.bouncycastle.crypto;
import java.math.BigInteger;
/**
* The basic interface that basic Diffie-Hellman implementations
* conforms to.
*/
public interface BasicAgreement
{
/**
* initialise the agreement engine.
*/
public void init(CipherParameters param);
/**
* given a public key from a given party calculate the next
* message in the agreement sequence.
*/
public BigInteger calculateAgreement(CipherParameters pubKey);
}
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