package com.highdatas.mdm.util;
|
|
import org.apache.commons.codec.binary.Base64;
|
|
import javax.crypto.Cipher;
|
import javax.crypto.spec.SecretKeySpec;
|
import java.security.Security;
|
|
/**
|
* @author kimi
|
* @description
|
* @date 2020-04-17 9:31
|
*/
|
|
|
public class AESUtil {
|
|
private static final String EncryptAlg ="AES";
|
|
private static final String Cipher_Mode="AES/ECB/PKCS7Padding";
|
|
private static final String Encode="UTF-8";
|
|
private static final int Secret_Key_Size=32;
|
|
private static final String Key_Encode="UTF-8";
|
|
/**
|
* AES/ECB/PKCS7Padding 加密
|
* @param content
|
* @param key 密钥
|
* @return aes加密后 转base64
|
* @throws Exception
|
*/
|
public static String aesPKCS7PaddingEncrypt(String content, String key) throws Exception {
|
try {
|
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
|
|
Cipher cipher = Cipher.getInstance(Cipher_Mode);
|
byte[] realKey=getSecretKey(key);
|
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(realKey,EncryptAlg));
|
byte[] data=cipher.doFinal(content.getBytes(Encode));
|
String result=new Base64().encodeToString(data);
|
return result;
|
} catch (Exception e) {
|
e.printStackTrace();
|
throw new Exception("AES加密失败：content=" +content +" key="+key);
|
}
|
}
|
|
/**
|
* AES/ECB/PKCS7Padding 解密
|
* @param content
|
* @param key 密钥
|
* @return 先转base64 再解密
|
* @throws Exception
|
*/
|
public static String aesPKCS7PaddingDecrypt(String content, String key) throws Exception {
|
try {
|
//Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
|
|
byte[] decodeBytes= Base64.decodeBase64(content);
|
|
Cipher cipher = Cipher.getInstance(Cipher_Mode);
|
byte[] realKey=getSecretKey(key);
|
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(realKey,EncryptAlg));
|
byte[] realBytes=cipher.doFinal(decodeBytes);
|
|
return new String(realBytes, Encode);
|
} catch (Exception e) {
|
e.printStackTrace();
|
throw new Exception("AES解密失败：Aescontent = " +e.fillInStackTrace(),e);
|
}
|
}
|
|
/**
|
* 对密钥key进行处理：如密钥长度不够位数的则 以指定paddingChar 进行填充；
|
* 此处用空格字符填充，也可以 0 填充
|
* @param key
|
* @return
|
* @throws Exception
|
*/
|
public static byte[] getSecretKey(String key) throws Exception{
|
final byte paddingChar=' ';
|
|
byte[] realKey = new byte[Secret_Key_Size];
|
byte[] byteKey = key.getBytes(Key_Encode);
|
for (int i =0;i<realKey.length;i++){
|
if (i<byteKey.length){
|
realKey[i] = byteKey[i];
|
}else {
|
realKey[i] = paddingChar;
|
}
|
}
|
|
return realKey;
|
}
|
|
}
|
