Java Key Pair Create generateKeyPair()

Description

generate Key Pair

License

Open Source License

Declaration

public static KeyPair generateKeyPair()
            throws NoSuchAlgorithmException,
            InvalidAlgorithmParameterException 

Method Source Code

//package com.java2s;
/*//from  w w  w. j a  va  2  s.c  o m
 * SafeOnline project.
 *
 * Copyright 2005-2006 Frank Cornelis.
 * Copyright 2006-2007 Lin.k N.V. All rights reserved.
 * Lin.k N.V. proprietary/confidential. Use is subject to license terms.
 */

import java.security.*;

import java.security.interfaces.DSAKeyPairGenerator;
import java.security.spec.RSAKeyGenParameterSpec;

public class Main {
    protected static final int RSA_KEYSIZE = 1024;
    protected static final int DSA_MODLEN = 512;

    public static KeyPair generateKeyPair()
            throws NoSuchAlgorithmException,
            InvalidAlgorithmParameterException {

        return generateKeyPair("RSA");
    }

    public static KeyPair generateKeyPair(String algorithm)
            throws NoSuchAlgorithmException,
            InvalidAlgorithmParameterException {

        KeyPairGenerator keyPairGenerator = KeyPairGenerator
                .getInstance(algorithm);
        SecureRandom random = new SecureRandom();
        if ("RSA".equals(keyPairGenerator.getAlgorithm()))
            keyPairGenerator.initialize(new RSAKeyGenParameterSpec(
                    RSA_KEYSIZE, RSAKeyGenParameterSpec.F4), random);
        else if (keyPairGenerator instanceof DSAKeyPairGenerator) {
            DSAKeyPairGenerator dsaKeyPairGenerator = (DSAKeyPairGenerator) keyPairGenerator;
            dsaKeyPairGenerator.initialize(DSA_MODLEN, false, random);
        }
        return keyPairGenerator.generateKeyPair();
    }
}

Related

1. generateKeyDigest(int keyLength, String password)
2. generateKeyFromString(final String secKey, String algorithm)
3. generateKeyPair()
4. generateKeyPair()
5. generateKeyPair()
6. generateKeyPair()
7. generateKeyPair()
8. generateKeyPair()
9. generateKeyPair()