Java Key Pair Create generateKeyPair(String type, int size)

Description

generate Key Pair

License

Apache License

Declaration

public static KeyPair generateKeyPair(String type, int size)
            throws NoSuchAlgorithmException, NoSuchProviderException 

Method Source Code

//package com.java2s;
/*// w  ww  . ja va 2 s  .co m
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  The ASF licenses this file to You
 * 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.  For additional information regarding
 * copyright in this work, please see the NOTICE file in the top level
 * directory of this distribution.
 */

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 KeyPair generateKeyPair(String type, int size)
            throws NoSuchAlgorithmException, NoSuchProviderException {
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance(type);
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        keyGen.initialize(size, random);
        random.setSeed(System.currentTimeMillis());
        return keyGen.generateKeyPair();
    }

    public static KeyPair generateKeyPair(String type, int size, String provider)
            throws NoSuchAlgorithmException, NoSuchProviderException {
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance(type, provider);
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG", provider);
        keyGen.initialize(size, random);
        random.setSeed(System.currentTimeMillis());
        return keyGen.generateKeyPair();
    }
}

Related

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2. generateKeyPair(String algorithm, int keySize)
3. generateKeyPair(String algorithm, int keysize)
4. generateKeyPair(String algorithm, int size)
5. generateKeyPair(String keyAlgorithm, int keySize)
6. generateKeys(int size)
7. generateKeyStoreFromPEM(File certFile, File keyFile)
8. generateKeyZ(ECPrivateKey privateKey, ECPublicKey publicKey)