AES/DES加密解密及设备唯一标识获取

一、AES加密解密

公共变量：

   private static final String keyStr = "UITN25LMUQC436IM";    private static final String AESTYPE = "AES/CBC/PKCS5Padding";

1，加密

   public static String AES_Encrypt(String plainText){        byte[] encrypt = null;        try{            SecretKeySpec keySpec = new SecretKeySpec(keyStr.getBytes(), "AES");            //Key key = generateKey(keyStr);            IvParameterSpec iv = new IvParameterSpec(keyStr.getBytes("utf-8"));            Key key = keySpec;            Cipher cipher = Cipher.getInstance(AESTYPE);            cipher.init(Cipher.ENCRYPT_MODE, key, iv);            encrypt = cipher.doFinal(plainText.getBytes("utf-8"));        }catch(Exception e){            e.printStackTrace();        }        return android.util.Base64.encodeToString(encrypt, android.util.Base64.NO_WRAP);    }

2，解密

    public static String AES_Decrypt(String encryptData){        byte[] decrypt = null;        try{            SecretKeySpec keySpec = new SecretKeySpec(keyStr.getBytes(), "AES");            //Key key = generateKey(keyStr);            IvParameterSpec iv = new IvParameterSpec(keyStr.getBytes("utf-8"));            Key key = keySpec;            Cipher cipher = Cipher.getInstance(AESTYPE);            cipher.init(Cipher.DECRYPT_MODE, key, iv);            decrypt = cipher.doFinal(android.util.Base64.decode(encryptData.getBytes(), android.util.Base64.NO_WRAP));        }catch(Exception e){            e.printStackTrace();            return "";        }        return new String(decrypt).trim();    }

二、DES加密解密

1，CBC模式

    private static byte[] iv = {1, 2, 3, 4, 5, 6, 7, 8};    public static String encryptDES(String encryptString, String encryptKey) throws Exception {//      IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]);        IvParameterSpec zeroIv = new IvParameterSpec(iv);        SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES");        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");        cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);        byte[] encryptedData = cipher.doFinal(encryptString.getBytes());        return Base64Util.encode(encryptedData);    }    public static String decryptDES(String decryptString, String decryptKey) throws Exception {        byte[] byteMi = new Base64Util().decode(decryptString);        IvParameterSpec zeroIv = new IvParameterSpec(iv);//      IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]);        SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES");        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");        cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);        byte decryptedData[] = cipher.doFinal(byteMi);        return new String(decryptedData);    }

2，ECB模式

  public static final String ALGORITHM_DES = "DES/ECB/PKCS5Padding";    /**     * 加密     *     * @param data 待加密字符串     * @param key  加密私钥，长度不能够小于8位     * @return 加密后的字节数组，一般结合Base64编码使用     * @throws Exception 异常     */    public static String encode(String key, String data) throws Exception {        try {            DESKeySpec dks = new DESKeySpec(key.getBytes());            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");            // key的长度不能够小于8位字节            Key secretKey = keyFactory.generateSecret(dks);            Cipher cipher = Cipher.getInstance(ALGORITHM_DES);            cipher.init(Cipher.ENCRYPT_MODE, secretKey);            byte[] bytes = cipher.doFinal(data.getBytes());            return Base64.encodeToString(bytes, 3);        } catch (Exception e) {            throw new Exception(e);        }    }    /**     * 解密     *     * @param data 待解密字符串     * @param key  解密私钥，长度不能够小于8位     * @return 解密后的字节数组     * @throws Exception 异常     */    public static byte[] decode(String key, byte[] data) throws Exception {        try {            DESKeySpec dks = new DESKeySpec(key.getBytes());            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");            // key的长度不能够小于8位字节            Key secretKey = keyFactory.generateSecret(dks);            Cipher cipher = Cipher.getInstance(ALGORITHM_DES);            cipher.init(Cipher.DECRYPT_MODE, secretKey);            return cipher.doFinal(data);        } catch (Exception e) {            throw new Exception(e);        }    }    /**     * 获取编码后的值     *     * @param key     * @param data     * @return     * @throws Exception     */    public static String decodeValue(String key, String data) {        byte[] datas;        String value = null;        try {            if (System.getProperty("os.name") != null                    && (System.getProperty("os.name").equalsIgnoreCase("sunos") || System                    .getProperty("os.name").equalsIgnoreCase("linux"))) {                datas = decode(key, Base64.decode(data, 3));            } else {                datas = decode(key, Base64.decode(data, 3));            }            value = new String(datas);        } catch (Exception e) {            value = "";        }        return value;    }

三、加密解密校验

加密解密代码：

        String key = "MNOojhxv";//key保持加密解密一致就好        String text = "12345678";        try {            String result1 = DesUtil.encryptDES(text, key);            String result2 = DesUtil.decryptDES(result1, key);            Log.i("DES encode text is ", result1);            Log.i("DES encode text is ", result2);            String result3 = AesUtil.AES_Encrypt(text);            String result4 = AesUtil.AES_Decrypt(result3);            Log.i("AES encode text is ", result3);            Log.i("AES encode text is ", result4);        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        //        测试（CBC模式的测试和ECB的一样）：        try {            //待加密内容url            String str = "12345678";            String pwdKey = "moshapp";            String pwdKeyMD5 = "moshappMd5";//            String pwdKeyMD5 = MD5Util.encode(pwdKey);//            System.out.println("pwdKeyMD5：" + pwdKeyMD5);            String encodeStr = DesUtil.encode(pwdKeyMD5, str);            String decodeStr = DesUtil.decodeValue(pwdKeyMD5, encodeStr);            System.out.println("加密前的字符串：" + str);            System.out.println("加密后的字符串：" + encodeStr);            System.out.println("解密后的字符串：" + decodeStr);            // URL转义            final String encodedURL = URLEncoder.encode(encodeStr, "UTF-8");            // URL urlStr = new URL(encodedURL);            System.out.println("转义后的字符串：" + encodedURL);        } catch (Exception e) {            e.printStackTrace();        }

结果输出：

四、设备唯一标识获取

获取IMEI：

    /**     * 获得手机的IMEI     */    private static String getPhoneImei(Context con) {        TelephonyManager tm = (TelephonyManager) con                .getSystemService(Context.TELEPHONY_SERVICE);        return tm.getDeviceId();    }

存在有些Android手机获取不成功，在转换获取Mac地址：

    private static String getLocalMacAddress(Context con) {        WifiManager wifi = (WifiManager) con.getSystemService(Context.WIFI_SERVICE);        WifiInfo info = wifi.getConnectionInfo();        Debug.e("", "info.getMacAddress()=" + info.getMacAddress());        return info.getMacAddress();    }

以上获取Mac地址，在Android6.0及以上版本有可能获取默认值：02:00:00:00:00:00。

增强使用以下方法：

    public static String getMacAddress(Context context) {        String macAddress = null;        try {            String wifiInterfaceName = "wlan0";            Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();            while (interfaces.hasMoreElements()) {                NetworkInterface iF = interfaces.nextElement();                if (iF.getName().equalsIgnoreCase(wifiInterfaceName)) {                    byte[] addr = iF.getHardwareAddress();                    if (addr == null || addr.length == 0) {                        return null;                    }                    StringBuilder buf = new StringBuilder();                    for (byte b : addr) {                        buf.append(String.format("%02X:", b));                    }                    if (buf.length() > 0) {                        buf.deleteCharAt(buf.length() - 1);                    }                    macAddress = buf.toString();                    break;                }            }        } catch (SocketException se) {            macAddress = null;        }        if (TextUtils.isEmpty(macAddress)) {            android.net.wifi.WifiManager wifi = (android.net.wifi.WifiManager) context.getSystemService(Context.WIFI_SERVICE);            macAddress = wifi.getConnectionInfo().getMacAddress();        }        return macAddress;    }

传送门

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