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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.crypto.params;

import java.math.BigInteger;

public class RSAPrivateCrtKeyParameters
    extends RSAKeyParameters
{
    private BigInteger  e;
    private BigInteger  p;
    private BigInteger  q;
    private BigInteger  dP;
    private BigInteger  dQ;
    private BigInteger  qInv;

    /**
     * 
     */
    public RSAPrivateCrtKeyParameters(
        BigInteger  modulus,
        BigInteger  publicExponent,
        BigInteger  privateExponent,
        BigInteger  p,
        BigInteger  q,
        BigInteger  dP,
        BigInteger  dQ,
        BigInteger  qInv)
    {
        super(true, modulus, privateExponent);

        this.e = publicExponent;
        this.p = p;
        this.q = q;
        this.dP = dP;
        this.dQ = dQ;
        this.qInv = qInv;
    }

    public BigInteger getPublicExponent()
    {
        return e;
    }

    public BigInteger getP()
    {
        return p;
    }

    public BigInteger getQ()
    {
        return q;
    }

    public BigInteger getDP()
    {
        return dP;
    }

    public BigInteger getDQ()
    {
        return dQ;
    }

    public BigInteger getQInv()
    {
        return qInv;
    }
}