generate AES Key from key String - Android java.security

Android examples for java.security:AES

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Description

generate AES Key from key String

Demo Code


//package com.java2s;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;

import android.util.Log;

public class Main {
    public static final String AES = "AES";

    public static SecretKey geneKey(String key)
            throws NoSuchAlgorithmException {

        final int outputKeyLength = 256;

        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
        Log.i("sr", "secureRandom:" + secureRandom.getProvider().getInfo());


        secureRandom.setSeed(key.getBytes());

        KeyGenerator keyGenerator = KeyGenerator.getInstance(AES);

        keyGenerator.init(outputKeyLength, secureRandom);

        SecretKey seckey = keyGenerator.generateKey();
        return seckey;
    }/*from ww w. j  a  va  2s  .co m*/
}

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