Java tutorial
/* * * This file is part of the XiPKI project. * Copyright (c) 2014 - 2015 Lijun Liao * Author: Lijun Liao * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License version 3 * as published by the Free Software Foundation with the addition of the * following permission added to Section 15 as permitted in Section 7(a): * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY * THE AUTHOR LIJUN LIAO. LIJUN LIAO DISCLAIMS THE WARRANTY OF NON INFRINGEMENT * OF THIRD PARTY RIGHTS. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * The interactive user interfaces in modified source and object code versions * of this program must display Appropriate Legal Notices, as required under * Section 5 of the GNU Affero General Public License. * * You can be released from the requirements of the license by purchasing * a commercial license. Buying such a license is mandatory as soon as you * develop commercial activities involving the XiPKI software without * disclosing the source code of your own applications. * * For more information, please contact Lijun Liao at this * address: lijun.liao@gmail.com */ package org.xipki.security.bcext; import java.io.IOException; import java.math.BigInteger; import java.security.interfaces.RSAPrivateCrtKey; import java.security.spec.RSAPrivateCrtKeySpec; import org.bouncycastle.asn1.DERNull; import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers; import org.bouncycastle.asn1.pkcs.PrivateKeyInfo; import org.bouncycastle.asn1.pkcs.RSAPrivateKey; import org.bouncycastle.asn1.x509.AlgorithmIdentifier; import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters; import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil; /** * Copied from BouncyCastle under license MIT * * A provider representation for a RSA private key, with CRT factors included. * @author Lijun Liao */ public class BCRSAPrivateCrtKey extends BCRSAPrivateKey implements RSAPrivateCrtKey { static final long serialVersionUID = 7834723820638524718L; private BigInteger publicExponent; private BigInteger primeP; private BigInteger primeQ; private BigInteger primeExponentP; private BigInteger primeExponentQ; private BigInteger crtCoefficient; /** * construct a private key from it's org.bouncycastle.crypto equivalent. * * @param key the parameters object representing the private key. */ public BCRSAPrivateCrtKey(final RSAPrivateCrtKeyParameters key) { super(key); this.publicExponent = key.getPublicExponent(); this.primeP = key.getP(); this.primeQ = key.getQ(); this.primeExponentP = key.getDP(); this.primeExponentQ = key.getDQ(); this.crtCoefficient = key.getQInv(); } /** * construct a private key from an RSAPrivateCrtKeySpec * * @param spec the spec to be used in construction. */ public BCRSAPrivateCrtKey(final RSAPrivateCrtKeySpec spec) { this.modulus = spec.getModulus(); this.publicExponent = spec.getPublicExponent(); this.privateExponent = spec.getPrivateExponent(); this.primeP = spec.getPrimeP(); this.primeQ = spec.getPrimeQ(); this.primeExponentP = spec.getPrimeExponentP(); this.primeExponentQ = spec.getPrimeExponentQ(); this.crtCoefficient = spec.getCrtCoefficient(); } /** * construct a private key from another RSAPrivateCrtKey. * * @param key the object implementing the RSAPrivateCrtKey interface. */ public BCRSAPrivateCrtKey(final RSAPrivateCrtKey key) { this.modulus = key.getModulus(); this.publicExponent = key.getPublicExponent(); this.privateExponent = key.getPrivateExponent(); this.primeP = key.getPrimeP(); this.primeQ = key.getPrimeQ(); this.primeExponentP = key.getPrimeExponentP(); this.primeExponentQ = key.getPrimeExponentQ(); this.crtCoefficient = key.getCrtCoefficient(); } /** * construct an RSA key from a private key info object. */ public BCRSAPrivateCrtKey(final PrivateKeyInfo info) throws IOException { this(RSAPrivateKey.getInstance(info.parsePrivateKey())); } /** * construct an RSA key from a ASN.1 RSA private key object. */ public BCRSAPrivateCrtKey(final RSAPrivateKey key) { this.modulus = key.getModulus(); this.publicExponent = key.getPublicExponent(); this.privateExponent = key.getPrivateExponent(); this.primeP = key.getPrime1(); this.primeQ = key.getPrime2(); this.primeExponentP = key.getExponent1(); this.primeExponentQ = key.getExponent2(); this.crtCoefficient = key.getCoefficient(); } /** * return the encoding format we produce in getEncoded(). * * @return the encoding format we produce in getEncoded(). */ public String getFormat() { return "PKCS#8"; } /** * Return a PKCS8 representation of the key. The sequence returned * represents a full PrivateKeyInfo object. * * @return a PKCS8 representation of the key. */ public byte[] getEncoded() { AlgorithmIdentifier algId = new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE); RSAPrivateKey key = new RSAPrivateKey(getModulus(), getPublicExponent(), getPrivateExponent(), getPrimeP(), getPrimeQ(), getPrimeExponentP(), getPrimeExponentQ(), getCrtCoefficient()); return KeyUtil.getEncodedPrivateKeyInfo(algId, key); } /** * return the public exponent. * * @return the public exponent. */ public BigInteger getPublicExponent() { return publicExponent; } /** * return the prime P. * * @return the prime P. */ public BigInteger getPrimeP() { return primeP; } /** * return the prime Q. * * @return the prime Q. */ public BigInteger getPrimeQ() { return primeQ; } /** * return the prime exponent for P. * * @return the prime exponent for P. */ public BigInteger getPrimeExponentP() { return primeExponentP; } /** * return the prime exponent for Q. * * @return the prime exponent for Q. */ public BigInteger getPrimeExponentQ() { return primeExponentQ; } /** * return the CRT coefficient. * * @return the CRT coefficient. */ public BigInteger getCrtCoefficient() { return crtCoefficient; } public int hashCode() { return this.getModulus().hashCode() ^ this.getPublicExponent().hashCode() ^ this.getPrivateExponent().hashCode(); } public boolean equals(Object o) { if (o == this) { return true; } if (!(o instanceof RSAPrivateCrtKey)) { return false; } RSAPrivateCrtKey key = (RSAPrivateCrtKey) o; return this.getModulus().equals(key.getModulus()) && this.getPublicExponent().equals(key.getPublicExponent()) && this.getPrivateExponent().equals(key.getPrivateExponent()) && this.getPrimeP().equals(key.getPrimeP()) && this.getPrimeQ().equals(key.getPrimeQ()) && this.getPrimeExponentP().equals(key.getPrimeExponentP()) && this.getPrimeExponentQ().equals(key.getPrimeExponentQ()) && this.getCrtCoefficient().equals(key.getCrtCoefficient()); } public String toString() { StringBuilder buf = new StringBuilder(); String nl = System.getProperty("line.separator"); buf.append("RSA Private CRT Key").append(nl); buf.append(" modulus: ").append(this.getModulus().toString(16)).append(nl); buf.append(" public exponent: ").append(this.getPublicExponent().toString(16)).append(nl); buf.append(" private exponent: ").append(this.getPrivateExponent().toString(16)).append(nl); buf.append(" primeP: ").append(this.getPrimeP().toString(16)).append(nl); buf.append(" primeQ: ").append(this.getPrimeQ().toString(16)).append(nl); buf.append(" primeExponentP: ").append(this.getPrimeExponentP().toString(16)).append(nl); buf.append(" primeExponentQ: ").append(this.getPrimeExponentQ().toString(16)).append(nl); buf.append(" crtCoefficient: ").append(this.getCrtCoefficient().toString(16)).append(nl); return buf.toString(); } }