import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import java.security.Security;
public class AESUtil {
/*
* 加密用的Key 可以用26個字母和數字組成 使用AES-128-CBC加密模式，key需要為16位，
*/
private static final String key = "nLnE4JFFbF6eAzja";
private static final String iv = "EJ9iIPhzB4I5UDfs";
static{
try{
Security.addProvider(new BouncyCastleProvider());
}catch(Exception e){
e.printStackTrace();
}
}
/**
* @author miracle.qu
* @Description AES演算法加密明文
* @param data 明文
* @return 密文
*/
public static String encryptAES(String data) throws Exception {
try {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
SecretKeySpec keyspec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
// CBC模式，需要一個向量iv，可增加加密演算法的強度
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes("UTF-8"));
cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
byte[] encrypted = cipher.doFinal(data.getBytes("UTF-8"));
// BASE64做轉碼，
return AESUtil.encode(encrypted).trim();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* @author miracle.qu
* @Description AES演算法解密密文
* @param data 密文
* @return 明文
*/
public static String decryptAES(String data) throws Exception {
try
{
//先用base64解密
byte[] encrypted1 = AESUtil.decode(data);
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
SecretKeySpec keyspec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes("UTF-8"));
cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original);
return originalString.trim();
}
catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 編碼
* @param byteArray
* @return
*/
public static String encode(byte[] byteArray) {
return new String(new Base64().encode(byteArray));
}
/**
* 解碼
* @param base64EncodedString
* @return
*/
public static byte[] decode(String base64EncodedString) {
return new Base64().decode(base64EncodedString);
}
}
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