一、AES加密解密
公共變量：
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 加密私鑰，長度不能夠小於8位
* @return 加密後的字節數組，一般結合Base64編碼使用
* @throws Exception 異常
*/
public static String encode(String key, String data) throws Exception {
try {
DESKeySpec dks = new DESKeySpec(key.getBytes());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
// key的長度不能夠小於8位字節
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 解密私鑰，長度不能夠小於8位
* @return 解密後的字節數組
* @throws Exception 異常
*/
public static byte[] decode(String key, byte[] data) throws Exception {
try {
DESKeySpec dks = new DESKeySpec(key.getBytes());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
// key的長度不能夠小於8位字節
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);
}
}
/**
* 獲取編碼後的值
*
* @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、加密解密校驗
加密解密代碼：
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();
}
// 測試（CBC模式的測試和ECB的一樣）：
try {
//待加密內容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("加密後的字符串：" + encodeStr);
System.out.println("解密後的字符串：" + decodeStr);
// URL轉義
final String encodedURL = URLEncoder.encode(encodeStr, "UTF-8");
// URL urlStr = new URL(encodedURL);
System.out.println("轉義後的字符串：" + encodedURL);
} catch (Exception e) {
e.printStackTrace();
}結果輸出：
四、設備唯一標識獲取
獲取IMEI：
/**
* 獲得手機的IMEI
*/
private static String getPhoneImei(Context con) {
TelephonyManager tm = (TelephonyManager) con
.getSystemService(Context.TELEPHONY_SERVICE);
return tm.getDeviceId();
}存在有些Android手機獲取不成功，在轉換獲取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();
}以上獲取Mac地址，在Android6.0及以上版本有可能獲取默認值：02:00:00:00:00:00。
增強使用以下方法：
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;
}傳送門
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