Android Password Encrypt encrypt(String password, String data)

Description

encrypt

License

Open Source License

Declaration

public static String encrypt(String password, String data)
            throws Exception 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import android.util.Base64;

public class Main {
    private static final String CIPHER_ALGORITHM = "AES";
    private static final String RANDOM_GENERATOR_ALGORITHM = "SHA1PRNG";
    private static final int RANDOM_KEY_SIZE = 128;

    public static String encrypt(String password, String data)
            throws Exception {

        byte[] secretKey = generateKey(password.getBytes());
        byte[] clear = data.getBytes();
        SecretKeySpec secretKeySpec = new SecretKeySpec(secretKey,
                CIPHER_ALGORITHM);/*from   w w w.  j  a v  a2s.  c  o  m*/
        Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
        byte[] encrypted = cipher.doFinal(clear);
        String encryptedString = Base64.encodeToString(encrypted,
                Base64.DEFAULT);
        return encryptedString;
    }

    public static byte[] generateKey(byte[] seed) throws Exception {
        KeyGenerator keyGenerator = KeyGenerator
                .getInstance(CIPHER_ALGORITHM);
        SecureRandom secureRandom = SecureRandom
                .getInstance(RANDOM_GENERATOR_ALGORITHM);
        secureRandom.setSeed(seed);
        keyGenerator.init(RANDOM_KEY_SIZE, secureRandom);
        SecretKey secretKey = keyGenerator.generateKey();
        return secretKey.getEncoded();
    }
}

Related

1. encryptionKey(String password)
2. encryptionKey(String password)