傳入一個私密的key, 一個需要加密的信息, 進行加密。
傳入一個私密的key, 一個需要解密的祕聞信息,進行解密。
import java.security.Key;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
* @author wangwei
* @version v1.0.0
* @description AES加密工具
* @date 2019-01-14
*/
public class SecurityUtil {
// optional value AES/DES/DESede
public static String DES = "AES";
// optional value AES/DES/DESede
public static String CIPHER_ALGORITHM = "AES";
public static Key getKey(String strKey) {
try {
if (strKey == null) {
strKey = "";
}
KeyGenerator _generator = KeyGenerator.getInstance("AES");
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(strKey.getBytes());
_generator.init(128, secureRandom);
return _generator.generateKey();
} catch (Exception e) {
throw new RuntimeException(" 密鑰出現異常 ");
}
}
public static String encrypt(String data, String key) throws Exception {
SecureRandom sr = new SecureRandom();
Key secureKey = getKey(key);
Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, secureKey, sr);
byte[] bt = cipher.doFinal(data.getBytes());
String strS = new BASE64Encoder().encode(bt);
return strS;
}
public static String decrypt(String message, String key) throws Exception {
SecureRandom sr = new SecureRandom();
Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
Key secureKey = getKey(key);
cipher.init(Cipher.DECRYPT_MODE, secureKey, sr);
byte[] res = new BASE64Decoder().decodeBuffer(message);
res = cipher.doFinal(res);
return new String(res);
}
public static void main(String[] args) throws Exception {
String message = "123456";
String key = "key_123456";
String encryptMsg = encrypt(message, key);
System.out.println("加密信息");
System.out.println(encryptMsg);
String decryptedMsg = decrypt(encryptMsg, key);
System.out.println("解密信息");
System.out.println(decryptedMsg);
}
}