Java Key Pair Create generateKey(String keyPhrase)

Description

Generate key which contains a pair of privae and public key using 1024 bytes

License

Apache License

Exception

Parameter	Description
NoSuchAlgorithmException	an exception

Return

key pair

Declaration

public static KeyPair generateKey(String keyPhrase) throws GeneralSecurityException 

Method Source Code

//package com.java2s;
/**/* w ww  .  ja  v  a 2 s. c  o  m*/
 * Copyright (c) 2012 Aon eSolutions
 *
 * 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.GeneralSecurityException;

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

import java.security.SecureRandom;

public class Main {
    protected static final String ALGORITHM = "RSA";

    /**
     * Generate key which contains a pair of privae and public key using 1024 bytes
     * @return key pair
     * @throws NoSuchAlgorithmException
     */
    public static KeyPair generateKey(String keyPhrase) throws GeneralSecurityException {
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance(ALGORITHM);

        SecureRandom randomAlg = SecureRandom.getInstance("SHA1PRNG", "SUN");
        randomAlg.setSeed(keyPhrase.getBytes());

        keyGen.initialize(1024, randomAlg);
        KeyPair key = keyGen.generateKeyPair();
        return key;
    }

    public static KeyPair generateKey() throws GeneralSecurityException {
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance(ALGORITHM);
        keyGen.initialize(1024);
        KeyPair key = keyGen.generateKeyPair();
        return key;
    }
}

Related

1. generateKey(SecureRandom sr, int size)
2. generateKey(String algom, int keylength)
3. generateKey(String algorithm, int keySize)
4. generateKey(String algorithm, int size)
5. generateKey(String cipherAlgorithm)
6. generateKey(String password)
7. generateKey(String PRIVATE_KEY_FILE, String PUBLIC_KEY_FILE)
8. generateKey(String publicKeyFilename, String privateKeyFilename, String password)
9. generateKey(String secretKey)