AES encrypt String and return a string - Android java.security

Android examples for java.security:AES

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Description

AES encrypt String and return a string

Demo Code


//package com.java2s;

import javax.crypto.Cipher;

import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class Main {
    public static final String AES = "AES";
    public static String CRYPT_KEY = "your key";
    public static byte[] iv = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
            0, 0 };/* w  w w .  ja  va2 s  .  co  m*/

    public final static String encrypt(String data) {
        try {
            return byte2hex(encrypt(data.getBytes("utf-8"), CRYPT_KEY));
        } catch (Exception e) {
            e.printStackTrace();

        }
        return null;
    }

    public static byte[] encrypt(byte[] src, String key) throws Exception {

        //SecretKey seckey = geneKey(key);

        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), AES);

        IvParameterSpec ivspec = new IvParameterSpec(iv);// ????????????? (IV)

        // ????????? cipher ??
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");// ??????????????
        // Cipher ??
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivspec);// ???????,???????,??
        // cipher.update(src);
        return cipher.doFinal(src);// ??????
    }

    public static String byte2hex(byte[] b) {
        String hs = "";
        String stmp = "";
        for (int n = 0; n < b.length; n++) {
            stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
            if (stmp.length() == 1)
                hs = hs + "0" + stmp;
            else
                hs = hs + stmp;
        }
        return hs.toUpperCase();
    }
}

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