Java Key Pair Create generateKeyPair()

Description

generate Key Pair

License

Apache License

Declaration

public static KeyPair generateKeyPair() 

Method Source Code

//package com.java2s;
/*/*  w w  w .j  a  va2  s  .co m*/
 * Copyright (C) 2016 Maximilian Pawlidi
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.security.KeyPair;
import java.security.KeyPairGenerator;

import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.SecureRandom;

public class Main {
    public static final String CIPHER_ALGORITHM = "RSA";
    public static final String RANDOM_NUMBER_GENERATOR_ALGORITHM = "SHA1PRNG";

    /**
     * 
     * @return
     */
    public static KeyPair generateKeyPair() {
        KeyPairGenerator generator = null;
        SecureRandom secureRandom = null;
        try {
            generator = KeyPairGenerator.getInstance(CIPHER_ALGORITHM);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("Could not generate key", e);
        }
        try {
            secureRandom = SecureRandom.getInstance(RANDOM_NUMBER_GENERATOR_ALGORITHM, "SUN");
        } catch (NoSuchAlgorithmException | NoSuchProviderException e) {
            // ignore exception
        }
        if (secureRandom == null) {
            generator.initialize(2048);
        } else {
            generator.initialize(2048, secureRandom);
        }
        return generator.generateKeyPair();
    }
}

Related

1. generateKeyPair()
2. generateKeyPair()
3. generateKeyPair()
4. generateKeyPair()
5. generateKeyPair()
6. generateKeyPair(final Provider provider, final String keyPairAlgorithm, final String secureAlgorithm)
7. generateKeyPair(final String algorithm, final int keylen)
8. generateKeyPair(final String algorithmModePad, final int keySize)
9. generateKeyPair(int bit)