ecdhbasicagreement.java

来自「进行与数字证书相关开发必须的java源码」· Java 代码 · 共 38 行

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   ECDHBasicAgreement.java

package jit.crypto.agreement;

import jit.crypto.BasicAgreement;
import jit.crypto.CipherParameters;
import jit.crypto.params.ECPrivateKeyParameters;
import jit.crypto.params.ECPublicKeyParameters;
import jit.math.BigInteger;
import jit.math.ec.ECFieldElement;
import jit.math.ec.ECPoint;

public class ECDHBasicAgreement
    implements BasicAgreement
{

    private ECPrivateKeyParameters key;

    public ECDHBasicAgreement()
    {
    }

    public void init(CipherParameters key)
    {
        this.key = (ECPrivateKeyParameters)key;
    }

    public BigInteger calculateAgreement(CipherParameters pubKey)
    {
        ECPublicKeyParameters pub = (ECPublicKeyParameters)pubKey;
        ECPoint P = pub.getQ().multiply(key.getD());
        return P.getX().toBigInteger();
    }
}