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Java example source code file (GenerateRSAPrivateCrtKey.java)

This example Java source code file (GenerateRSAPrivateCrtKey.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

biginteger, exception, generatersaprivatecrtkey, keyfactory, math, pkcs, pkcs8, pkcs8encodedkeyspec, rsa, rsaprivatecrtkey, rsaprivatecrtkeyspec, security, sunrsasign, util

The GenerateRSAPrivateCrtKey.java Java example source code

/*
 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 4413634
 * @summary Make sure that RSA Private CRT Key factory generation using
 * java.security.spec.RSAPrivateCrtKeySpec passes
 */

import java.math.BigInteger;
import java.security.KeyFactory;
import java.security.interfaces.RSAPrivateCrtKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.RSAPrivateCrtKeySpec;
import java.util.Arrays;

public class GenerateRSAPrivateCrtKey {

    public static void main(String[] args) throws Exception {

        // Create an RSA Private Key from the CRT information
        RSAPrivateCrtKeySpec rsaCrtSpec =
            new RSAPrivateCrtKeySpec(new BigInteger(1, modulus),
                                     new BigInteger(1, pubExpo),
                                     new BigInteger(1, priExpo),
                                     new BigInteger(1, primeP),
                                     new BigInteger(1, primeQ),
                                     new BigInteger(1, expoP),
                                     new BigInteger(1, expoQ),
                                     new BigInteger(1, coeff));

        // Create an RSA private key from the CRT specification
        KeyFactory kf = KeyFactory.getInstance("RSA", "SunRsaSign");
        RSAPrivateCrtKey rsaPriKey =
            (RSAPrivateCrtKey) kf.generatePrivate(rsaCrtSpec);

        // test resulting key against original specification
        if (!rsaPriKey.getCrtCoefficient().equals(rsaCrtSpec.getCrtCoefficient()))
            throw new Exception("coefficients not equal");
        if (!rsaPriKey.getPrimeExponentP().equals(rsaCrtSpec.getPrimeExponentP()))
            throw new Exception("primeExponentPs not equal");
        if (!rsaPriKey.getPrimeExponentQ().equals(rsaCrtSpec.getPrimeExponentQ()))
            throw new Exception("primeExponentQs not equal");
        if (!rsaPriKey.getPrimeP().equals(rsaCrtSpec.getPrimeP()))
            throw new Exception("primePs not equal");
        if (!rsaPriKey.getPrimeQ().equals(rsaCrtSpec.getPrimeQ()))
            throw new Exception("primeQs not equal");
        if (!rsaPriKey.getPublicExponent().equals(rsaCrtSpec.getPublicExponent()))
            throw new Exception("public exponents not equal");
        if (!rsaPriKey.getPrivateExponent().equals(rsaCrtSpec.getPrivateExponent()))
            throw new Exception("private exponents not equal");
        if (!rsaPriKey.getModulus().equals(rsaCrtSpec.getModulus()))
            throw new Exception("modulus not equal");
        if (!rsaPriKey.getFormat().equals("PKCS#8") &&
            !rsaPriKey.getFormat().equals("PKCS8"))
            throw new Exception("format not PKCS#8");
        if (!rsaPriKey.getAlgorithm().equals("RSA"))
            throw new Exception("algorithm not RSA");
        if (rsaPriKey.getEncoded() == null)
            throw new Exception("encoded key is null");

        PKCS8EncodedKeySpec pkcs8Key =
            new PKCS8EncodedKeySpec(rsaPriKey.getEncoded());

        RSAPrivateCrtKey rsaPriKey2
            = (RSAPrivateCrtKey) kf.generatePrivate(pkcs8Key);
        if (!Arrays.equals(rsaPriKey.getEncoded(), rsaPriKey2.getEncoded()))
            throw new Exception("encoded keys not equal");
    }

    static byte[] modulus = {
        (byte)0xab, (byte)0x38, (byte)0x39, (byte)0x40,
        (byte)0x54, (byte)0x2c, (byte)0xac, (byte)0x9a,
        (byte)0xc0, (byte)0x37, (byte)0x40, (byte)0xd0,
        (byte)0x49, (byte)0x04, (byte)0xed, (byte)0x51,
        (byte)0x0e, (byte)0x95, (byte)0x72, (byte)0x02,
        (byte)0x51, (byte)0xc2, (byte)0xad, (byte)0x9d,
        (byte)0xa7, (byte)0xeb, (byte)0xba, (byte)0x29,
        (byte)0xae, (byte)0xd4, (byte)0x49, (byte)0x79,
        (byte)0x53, (byte)0xfa, (byte)0xdf, (byte)0x01,
        (byte)0x6c, (byte)0xbc, (byte)0x69, (byte)0x46,
        (byte)0x4c, (byte)0x83, (byte)0x1b, (byte)0xd9,
        (byte)0x3b, (byte)0x59, (byte)0x42, (byte)0x04,
        (byte)0x99, (byte)0x0f, (byte)0x63, (byte)0x24,
        (byte)0x75, (byte)0xa0, (byte)0xbe, (byte)0x6f,
        (byte)0x92, (byte)0x4d, (byte)0x9d, (byte)0xa2,
        (byte)0x40, (byte)0xda, (byte)0xf8, (byte)0x49
    };

    static byte[] pubExpo = {
        (byte)0x01, (byte)0x00, (byte)0x01
    };

    static byte[] priExpo = {
        (byte)0x4a, (byte)0xd2, (byte)0xe7, (byte)0x32,
        (byte)0x15, (byte)0x96, (byte)0xf0, (byte)0x57,
        (byte)0x30, (byte)0x68, (byte)0xf5, (byte)0x0a,
        (byte)0x10, (byte)0xde, (byte)0xf6, (byte)0x56,
        (byte)0xd5, (byte)0xe8, (byte)0xb9, (byte)0x4a,
        (byte)0x0a, (byte)0x30, (byte)0xe9, (byte)0x6e,
        (byte)0x5c, (byte)0x53, (byte)0xc7, (byte)0xa7,
        (byte)0x2f, (byte)0x9f, (byte)0xd5, (byte)0xfb,
        (byte)0x58, (byte)0x9b, (byte)0x1e, (byte)0x5b,
        (byte)0xe8, (byte)0x6e, (byte)0xae, (byte)0x02,
        (byte)0xaa, (byte)0x15, (byte)0x23, (byte)0x67,
        (byte)0xaa, (byte)0x20, (byte)0x9e, (byte)0x82,
        (byte)0x76, (byte)0x4c, (byte)0xad, (byte)0xe1,
        (byte)0x95, (byte)0xde, (byte)0xe3, (byte)0x25,
        (byte)0x66, (byte)0x2f, (byte)0xb0, (byte)0xab,
        (byte)0x1c, (byte)0xe5, (byte)0xa0, (byte)0x01
    };

    static byte[] primeP = {
        (byte)0xd1, (byte)0xeb, (byte)0x51, (byte)0xbd,
        (byte)0x09, (byte)0x26, (byte)0x7e, (byte)0xe7,
        (byte)0x12, (byte)0x8c, (byte)0xeb, (byte)0x5c,
        (byte)0x32, (byte)0x18, (byte)0xd1, (byte)0x60,
        (byte)0x0b, (byte)0x49, (byte)0x67, (byte)0x8f,
        (byte)0x78, (byte)0x3c, (byte)0x58, (byte)0xc5,
        (byte)0xb0, (byte)0x01, (byte)0x70, (byte)0xee,
        (byte)0x1a, (byte)0xcf, (byte)0x6e, (byte)0xe1
    };

    static byte[] primeQ = {
        (byte)0xd0, (byte)0xce, (byte)0x21, (byte)0x83,
        (byte)0x41, (byte)0x73, (byte)0xf6, (byte)0x84,
        (byte)0x32, (byte)0x06, (byte)0xa8, (byte)0xa6,
        (byte)0xad, (byte)0x13, (byte)0x2b, (byte)0x65,
        (byte)0x27, (byte)0x86, (byte)0x28, (byte)0xef,
        (byte)0x0e, (byte)0x8c, (byte)0xca, (byte)0x4f,
        (byte)0x20, (byte)0xc0, (byte)0x19, (byte)0x95,
        (byte)0xfe, (byte)0x6c, (byte)0x3e, (byte)0x69
    };

    static byte[] expoP = {
        (byte)0x1a, (byte)0x49, (byte)0x9c, (byte)0xb7,
        (byte)0xce, (byte)0x80, (byte)0x8a, (byte)0x9d,
        (byte)0xc7, (byte)0x3d, (byte)0xec, (byte)0x6f,
        (byte)0x64, (byte)0x3a, (byte)0xa5, (byte)0x65,
        (byte)0xa0, (byte)0xa4, (byte)0x35, (byte)0x9a,
        (byte)0xca, (byte)0xd4, (byte)0xcb, (byte)0xcd,
        (byte)0x1d, (byte)0xc8, (byte)0x60, (byte)0x6b,
        (byte)0x00, (byte)0xe2, (byte)0x7f, (byte)0x21
    };

    static byte[] expoQ = {
        (byte)0xa7, (byte)0x93, (byte)0xd7, (byte)0x77,
        (byte)0x94, (byte)0xef, (byte)0x31, (byte)0x78,
        (byte)0x55, (byte)0x01, (byte)0xdd, (byte)0x16,
        (byte)0xaf, (byte)0xae, (byte)0xc3, (byte)0xd4,
        (byte)0x12, (byte)0x0d, (byte)0x6d, (byte)0x0a,
        (byte)0xb6, (byte)0xdd, (byte)0xad, (byte)0x7c,
        (byte)0x25, (byte)0xe7, (byte)0xa6, (byte)0x61,
        (byte)0x27, (byte)0xe8, (byte)0xcd, (byte)0x89
    };

    static byte[] coeff = {
        (byte)0x0b, (byte)0xdb, (byte)0x90, (byte)0x7f,
        (byte)0x33, (byte)0xc5, (byte)0x1f, (byte)0x5b,
        (byte)0x4d, (byte)0xa4, (byte)0x86, (byte)0xda,
        (byte)0x77, (byte)0xd4, (byte)0xb3, (byte)0x1d,
        (byte)0xbc, (byte)0xc3, (byte)0xae, (byte)0x0b,
        (byte)0xac, (byte)0x91, (byte)0xf3, (byte)0x38,
        (byte)0x4a, (byte)0xcf, (byte)0x10, (byte)0xb1,
        (byte)0x5e, (byte)0x5a, (byte)0xd1, (byte)0x86
    };
}

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