Android Key Create getKeyFromPassphrase(String passphrase, byte[] salt, int iterations)

Description

get Key From Passphrase

License

Open Source License

Declaration

private static SecretKey getKeyFromPassphrase(String passphrase,
            byte[] salt, int iterations) throws GeneralSecurityException 

Method Source Code

//package com.java2s;
/**//from w w w . j a v  a  2 s  . c om
 * Copyright (C) 2011 Whisper Systems
 * Copyright (C) 2013 Open Whisper Systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.security.GeneralSecurityException;

import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;

public class Main {
    private static SecretKey getKeyFromPassphrase(String passphrase,
            byte[] salt, int iterations) throws GeneralSecurityException {
        PBEKeySpec keyspec = new PBEKeySpec(passphrase.toCharArray(), salt,
                iterations);
        SecretKeyFactory skf = SecretKeyFactory
                .getInstance("PBEWITHSHA1AND128BITAES-CBC-BC");
        return skf.generateSecret(keyspec);
    }
}

Related

1. generateKey(char[] passphraseOrPin, byte[] salt)
2. generateKey(char[] passphraseOrPin, byte[] salt)
3. generateMacSecret()
4. getKey(String keyRule)
5. getKeyFromPassphrase(String passphrase, byte[] salt)
6. createDESedeKeySpec(SecretKey key)
7. createSecretKey(byte[] rawkey)
8. generatePBEKey(char[] password, byte[] salt, String algorthm, int iterations, int keyLength)
9. generateSymmetricKey()