android AES加密 --java

android 之 AES加密 解密

之前呢，一直用md5加密，感觉不是很高，并且还容易泄密，听说有被攻击的可能，所以最近研究了下AES(有写只是自己的见解，请大家勿喷啊)

不多说了，在app中一般的家里都在登录和修改用户这里

我在这里去说下，我在这里为什么要使用他，使用的时间间隔在7天

废话不多说了  直接上代码吧   《如果有问题的可以在我博客里留言，可以相互讨论学习》

公共方法 Utils

/** * 连接字符串 * @param join * @param strAry * @return */public static String join(String join, String[] strAry) {    StringBuffer sb = new StringBuffer();    for (int i = 0; i < strAry.length; i++) {        if (i == (strAry.length - 1)) {            sb.append(strAry[i]);        } else {            sb.append(strAry[i]).append(join);        }    }    return new String(sb);}/** * 时间见个 * @return */public static String getUtc() {    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式    Date curDate = new Date(System.currentTimeMillis());//获取当前时间    String date=df.format(curDate);    try {        Date d1 = df.parse(date);        Date d2 = df.parse("1970-01-01 00:00:00");        long diff = d1.getTime() - d2.getTime();        long days = diff / 1000;        return String.valueOf(days);    } catch (Exception e) {        e.printStackTrace();    }    return "";}

AesOperator类

import javax.crypto.Cipher;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;import Decoder.BASE64Decoder;import Decoder.BASE64Encoder;/** * Created by FlyMe0116 on 2016/4/13 0013. * <p> * AES 是一种可逆加密算法，对用户的敏感信息加密处理 对原始数据进行AES加密后，在进行Base64编码转化； */public class AESOperator {    /*     * 加密用的Key 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式，key需要为16位。     */    public static String sKey = "flyMe2016";    public static String ivParameter = "0183539607427309";    private static AESOperator instance = null;    private AESOperator() {    }    public static AESOperator getInstance() {        if (instance == null)            instance = new AESOperator();        return instance;    }    public static String Encrypt(String encData, String secretKey, String vector) throws Exception {        if (secretKey == null) {            return null;        }        if (secretKey.length() != 16) {            return null;        }        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");        byte[] raw = secretKey.getBytes();        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");        IvParameterSpec iv = new IvParameterSpec(vector.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);        byte[] encrypted = cipher.doFinal(encData.getBytes("utf-8"));        return new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。    }    // 加密    public static String encrypt(String sSrc) throws Exception {        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");        byte[] raw = sKey.getBytes();        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");        IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);        byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));        return new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。    }    // 解密    public String decrypt(String sSrc) throws Exception {        try {            byte[] raw = sKey.getBytes("ASCII");            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");            IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);            byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密            byte[] original = cipher.doFinal(encrypted1);            String originalString = new String(original, "utf-8");            return originalString;        } catch (Exception ex) {            return null;        }    }    public String decrypt(String sSrc, String key, String ivs) throws Exception {        try {            byte[] raw = key.getBytes("ASCII");            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");            IvParameterSpec iv = new IvParameterSpec(ivs.getBytes());            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);            byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密            byte[] original = cipher.doFinal(encrypted1);            String originalString = new String(original, "utf-8");            return originalString;        } catch (Exception ex) {            return null;        }    }    public static String encodeBytes(byte[] bytes) {        StringBuffer strBuf = new StringBuffer();        for (int i = 0; i < bytes.length; i++) {            strBuf.append((char) (((bytes[i] >> 4) & 0xF) + ((int) 'a')));            strBuf.append((char) (((bytes[i]) & 0xF) + ((int) 'a')));        }        return strBuf.toString();    }    public static void main(String[] args) throws Exception {        // 需要加密的字串        String cSrc = "[{\"request_no\":\"1001\",\"service_code\":\"FS0001\",\"contract_id\":\"100002\",\"order_id\":\"0\",\"phone_id\":\"13913996922\",\"plat_offer_id\":\"100094\",\"channel_id\":\"1\",\"activity_id\":\"100045\"}]";        // 加密        long lStart = System.currentTimeMillis();        String enString = AESOperator1.getInstance().encrypt(cSrc);        System.out.println("加密后的字串是：" + enString);        long lUseTime = System.currentTimeMillis() - lStart;        System.out.println("加密耗时：" + lUseTime + "毫秒");        // 解密        lStart = System.currentTimeMillis();        String DeString = AESOperator1.getInstance().decrypt(enString);        System.out.println("解密后的字串是：" + DeString);        lUseTime = System.currentTimeMillis() - lStart;        System.out.println("解密耗时：" + lUseTime + "毫秒");    }}

Example 类

/** * Created by FlyMe0116 on 2016/4/9 0009. * json web token example */public class Example {    public static String newuserAppId = "100110";    public static String newuserAppUser = "flyMeAndroid";    public static String url = "http://192.168.1.15:8090/api/Auth/GetAccessToken?";    static String DUOSHUO_SHORTNAME = "test";    static String DUOSHUO_SECRET = "3d990d2276917dfac04467df11fff26d";    public static void main(String[] args) {        test2();    }    private void test1() {        JSONObject userInfo = new JSONObject();        userInfo.put("short_name", DUOSHUO_SHORTNAME);//必须项        userInfo.put("user_key", "1");//必须项        userInfo.put("name", "网站用户A");//可选项        Payload payload = new Payload(userInfo);        JWSHeader header = new JWSHeader(JWSAlgorithm.HS256);        header.setContentType("jwt");        // Create JWS object        JWSObject jwsObject = new JWSObject(header, payload);        // Create HMAC signer        JWSSigner signer = new MACSigner(DUOSHUO_SECRET.getBytes());        try {            jwsObject.sign(signer);        } catch (JOSEException e) {            System.err.println("Couldn't sign JWS object: " + e.getMessage());            return;        }        // Serialise JWS object to compact format        String token = jwsObject.serialize();        System.out.println("Serialised JWS object: " + token);        //示例输出结果为eyJhbGciOiJIUzI1NiIsImN0eSI6Imp3dCJ9.eyJ1c2VyX2tleSI6IjEiLCJuYW1lIjoi572R56uZ55So5oi3QSIsInNob3J0X25hbWUiOiJ0ZXN0In0.NXKDXwXThzFkyfl_k_-p6mfM5cpOFppvfdIjrjEq14I    }    private static void test2() {        String timeStamp = Utils.getUtc();        System.out.println("===" + timeStamp);        try {            String signature = signatureString("flyMe2016", timeStamp, newuserAppId);            String appended = "&signature=" + signature + "&timestamp=" + timeStamp +                    "&username=" + newuserAppUser + "&appid=" + newuserAppId;            String queryUrl = url + appended;            System.out.println(queryUrl);        } catch (Exception e) {            e.printStackTrace();        }    }    private static String signatureString(String appSecret, String timeStamp, String appId) throws Exception {        String[] arrTmp = {appId, appSecret, timeStamp};        Arrays.sort(arrTmp);        String tmpStr = Utils.join("", arrTmp);//arrTmp[0]+arrTmp[1]+arrTmp[2];        //tmpStr = AESOperator.encrypt(tmpStr);        System.out.println("===" + tmpStr);        tmpStr = AESOperator1.encrypt(tmpStr);        System.out.println("===" + tmpStr);        return URLEncoder.encode(tmpStr,"UTF-8");       // return Uri.encode(tmpStr);//        URLEncoder.encode(string, "UTF-8");        //return Uri.encode(tmpStr, "UTF-8");    }}