C# AES-128-CBC 加密解密

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本文介绍了如何使用C#的Aesclass类实现AES加密和解密功能，包括UTF8编码处理和CBC模式操作。适合理解基础加密技术的开发者参考。

using FSBox.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace FSBox.FrontApi.common
{
    public class Aesclass
    {
        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="toEncrypt"></param>
        /// <param name="key"></param>
        /// <param name="iv"></param>
        /// <returns></returns>
        public static string AesEncrypt(string toEncrypt, string key, string iv)
        {
            byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);//注意编码格式(utf8编码 UTF8Encoding)
            byte[] ivArray = UTF8Encoding.UTF8.GetBytes(iv);

            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.IV = ivArray;
            rDel.Mode = CipherMode.CBC;
            //rDel.Padding = PaddingMode.Zeros;

            ICryptoTransform cTransform = rDel.CreateEncryptor();//加密
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return Convert.ToBase64String(resultArray, 0, resultArray.Length);


        }
        /// <summary>
        /// 解密
        /// </summary>
        /// <param name="toDecrypt"></param>
        /// <param name="key"></param>
        /// <param name="iv"></param>
        /// <returns></returns>
        public static string AesDecrypt(string toDecrypt, string key, string iv)
        {

            byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);

            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);//注意编码格式(utf8编码 UTF8Encoding)
            byte[] ivArray = UTF8Encoding.UTF8.GetBytes(iv);

            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.IV = ivArray;
            rDel.Mode = CipherMode.CBC;
            //rDel.Padding = PaddingMode.Zeros;

            ICryptoTransform cTransform = rDel.CreateDecryptor();//解密
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return UTF8Encoding.UTF8.GetString(resultArray);
        }
    }
}