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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 to JDK 1.8 with debug enabled.

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package org.bouncycastle.pqc.crypto.newhope;

import org.bouncycastle.crypto.CipherParameters;

public class NHAgreement
{
    private NHPrivateKeyParameters privKey;

    public void init(CipherParameters param)
    {
        privKey = (NHPrivateKeyParameters)param;
    }

    public byte[] calculateAgreement(CipherParameters otherPublicKey)
    {
        NHPublicKeyParameters pubKey = (NHPublicKeyParameters)otherPublicKey;

        byte[] sharedValue = new byte[NewHope.AGREEMENT_SIZE];

        NewHope.sharedA(sharedValue, privKey.secData, pubKey.pubData);

        return sharedValue;
    }
}




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