java C# .net 通用AES加密方式

 

 

 

package com.oms.common.utils;


import com.nh.oms.common.utils.encoder.BASE64Decoder;
import com.nh.oms.common.utils.encoder.BASE64Encoder;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

public class AesUtil {

    //实际的加密解密操作
    private static byte[] Operation(byte[] src,String key,int mode) throws Exception{
        if (key==null) {
            System.out.println("Key不能为空");
            return null;
        }
        if (key.length()!=16) {
            System.out.println("Key需要16位长度");
            return null;
        }

        byte[] raw=key.getBytes("utf-8");
        SecretKeySpec keySpec=new SecretKeySpec(raw, "AES");
        Cipher cipher=Cipher.getInstance("AES");
        cipher.init(mode, keySpec);
        byte[] encrypted=cipher.doFinal(src);
        return encrypted;
    }


    public static byte[] encrypt(byte[] src, String key) throws Exception {
        return Operation(src, key, Cipher.ENCRYPT_MODE);
    }

    public static byte[] decrypt(byte[] src, String key) throws Exception {
        return Operation(src, key, Cipher.DECRYPT_MODE);
    }

    public static String encryptStr(String src, String key) throws Exception {

        byte[] resultByte = Operation(src.getBytes("utf-8"), key, Cipher.ENCRYPT_MODE);
        return new BASE64Encoder().encode(resultByte);
    }

    public static String decryptStr(String src, String key) throws Exception {
        byte[] base64Byte=new BASE64Decoder().decodeBuffer(src);
        byte[] base64ResultByte = Operation(base64Byte, key, Cipher.DECRYPT_MODE);
        return new String(base64ResultByte);
    }


    public static void main(String[] args) {
        try {
            //我是加密密钥
            String key = "securitysecurity";
            String content = "这是机密文件不能泄露";

            System.out.println("加密前：" +content);
            System.out.println("密钥：" +key);


            try {
                String enCodeStr=encryptStr(content, key);

                System.out.println("\n加密后Base64的数据，这个可在C#/.NET解密:");
                System.out.println(enCodeStr);

                System.out.println("\nBase64解密后的数据:");
                String deCodeStr=decryptStr(enCodeStr, key);
                System.out.println(deCodeStr);

            } catch (Exception e) {
                e.printStackTrace();
            }


        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}