AES加密解密 加密解密使用

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

namespace Mask
{
    public class AESEncryptHelper
    {

        /// <summary>
        /// 获取密钥
        /// </summary>
        private static string Key
        {
            get { return @")O[NB]6,YF}+efcaj{+oESb9d8>Z'e9M"; }
        }

        /// <summary>
        /// 获取向量
        /// </summary>
        private static string IV
        {
            get { return @"L+\~f4,Ir)b$=pkf"; }
        }

        #region 参数是byte[]类型
        /// <summary>
        /// AES加密
        /// </summary>
        /// <param name="Data">被加密的明文</param>
        /// <param name="Key">密钥</param>
        /// <param name="Vector">向量</param>
        /// <returns>密文</returns>
        public static Byte[] AESEncrypt(Byte[] Data, String Key, String Vector)
        {
            Byte[] bKey = new Byte[];
            Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length);
            Byte[] bVector = new Byte[];
            Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length);
            Byte[] Cryptograph = null; // 加密后的密文
            Rijndael Aes = Rijndael.Create();
            try
            {
                // 开辟一块内存流
                using (MemoryStream Memory = new MemoryStream())
                {
                    // 把内存流对象包装成加密流对象
                    using (CryptoStream Encryptor = new CryptoStream(Memory,
                     Aes.CreateEncryptor(bKey, bVector),
                     CryptoStreamMode.Write))
                    {
                        // 明文数据写入加密流
                        Encryptor.Write(Data, , Data.Length);
                        Encryptor.FlushFinalBlock();

                        Cryptograph = Memory.ToArray();
                    }
                }
            }
            catch
            {
                Cryptograph = null;
            }
            return Cryptograph;
        }

        /// <summary>
        /// AES解密
        /// </summary>
        /// <param name="Data">被解密的密文</param>
        /// <param name="Key">密钥</param>
        /// <param name="Vector">向量</param>
        /// <returns>明文</returns>
        public static Byte[] AESDecrypt(Byte[] Data, String Key, String Vector)
        {
            Byte[] bKey = new Byte[];
            Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length);
            Byte[] bVector = new Byte[];
            Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length);

            Byte[] original = null; // 解密后的明文

            Rijndael Aes = Rijndael.Create();
            try
            {
                // 开辟一块内存流，存储密文
                using (MemoryStream Memory = new MemoryStream(Data))
                {
                    // 把内存流对象包装成加密流对象
                    using (CryptoStream Decryptor = new CryptoStream(Memory,
                    Aes.CreateDecryptor(bKey, bVector),
                    CryptoStreamMode.Read))
                    {
                        // 明文存储区
                        using (MemoryStream originalMemory = new MemoryStream())
                        {
                            Byte[] Buffer = new Byte[];
                            Int32 readBytes = ;
                            while ((readBytes = Decryptor.Read(Buffer, , Buffer.Length)) > )
                            {
                                originalMemory.Write(Buffer, , readBytes);
                            }

                            original = originalMemory.ToArray();
                        }
                    }
                }
            }
            catch
            {
                original = null;
            }
            return original;
        }

        #endregion

        #region 参数是string类型

        /// <summary>
        /// AES加密
        /// </summary>
        /// <param name="plainStr">明文字符串</param>
        /// <returns>密文</returns>
        public static string AESEncrypt(string plainStr)
        {
            byte[] bKey = Encoding.UTF8.GetBytes(Key);
            byte[] bIV = Encoding.UTF8.GetBytes(IV);
            byte[] byteArray = Encoding.UTF8.GetBytes(plainStr);

            string encrypt = null;
            Rijndael aes = Rijndael.Create();
            using (MemoryStream mStream = new MemoryStream())
            {
                using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateEncryptor(bKey, bIV), CryptoStreamMode.Write))
                {
                    cStream.Write(byteArray, , byteArray.Length);
                    cStream.FlushFinalBlock();
                    encrypt = Convert.ToBase64String(mStream.ToArray());
                }
            }
            aes.Clear();
            return encrypt;
        }

        /// <summary>
        /// AES加密
        /// </summary>
        /// <param name="plainStr">明文字符串</param>
        /// <param name="returnNull">加密失败时是否返回 null，false 返回 String.Empty</param>
        /// <returns>密文</returns>
        public static string AESEncrypt(string plainStr, bool returnNull)
        {
            string encrypt = AESEncrypt(plainStr);
            return returnNull ? encrypt : (encrypt == null ? String.Empty : encrypt);
        }

        /// <summary>
        /// AES解密
        /// </summary>
        /// <param name="encryptStr">密文字符串</param>
        /// <returns>明文</returns>
        public static string AESDecrypt(string encryptStr)
        {
            byte[] bKey = Encoding.UTF8.GetBytes(Key);
            byte[] bIV = Encoding.UTF8.GetBytes(IV);
            byte[] byteArray = Convert.FromBase64String(encryptStr);

            string decrypt = null;
            Rijndael aes = Rijndael.Create();
            using (MemoryStream mStream = new MemoryStream())
            {
                using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateDecryptor(bKey, bIV), CryptoStreamMode.Write))
                {
                    cStream.Write(byteArray, , byteArray.Length);
                    cStream.FlushFinalBlock();
                    decrypt = Encoding.UTF8.GetString(mStream.ToArray());
                }
            }
            aes.Clear();
            return decrypt;
        }

        /// <summary>
        /// AES解密
        /// </summary>
        /// <param name="encryptStr">密文字符串</param>
        /// <param name="returnNull">解密失败时是否返回 null，false 返回 String.Empty</param>
        /// <returns>明文</returns>
        public static string AESDecrypt(string encryptStr, bool returnNull)
        {
            string decrypt = AESDecrypt(encryptStr);
            return returnNull ? decrypt : (decrypt == null ? String.Empty : decrypt);
        }

        #endregion

        #region 256位AES加密算法

        /// <summary>
        /// 256位AES加密
        /// </summary>
        /// <param name="toEncrypt"></param>
        /// <returns></returns>
        public static string Encrypt(string toEncrypt)
        {
            // 256-AES key
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(Key);
            byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);

            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateEncryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, , toEncryptArray.Length);

            return Convert.ToBase64String(resultArray, , resultArray.Length);
        }

        /// <summary>
        /// 256位AES解密
        /// </summary>
        /// <param name="toDecrypt"></param>
        /// <returns></returns>
        public static string Decrypt(string toDecrypt)
        {
            // 256-AES key
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(Key);
            byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);

            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateDecryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, , toEncryptArray.Length);

            return UTF8Encoding.UTF8.GetString(resultArray);
        }
        #endregion
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Mask
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnEncrypt_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(txtSourceText.Text))
            {
                MessageBox.Show("没数据加毛密-_-!");
                return;
            }
            else
            {
                txtResultText.Text = AESEncryptHelper.Encrypt(txtSourceText.Text);
            }
        }
        /// <summary>
        /// 解密
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnDecrypt_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(txtSourceText.Text))
            {
                MessageBox.Show("没数据解毛密-_-!");
                return;
            }
            else if (!IsBase64Formatted(txtSourceText.Text))
            {
                MessageBox.Show("别逗了,我只认识被我加过密的？");
                return;
            }
            else
            {
                txtResultText.Text = AESEncryptHelper.Decrypt(txtSourceText.Text);
            }
        }

        public static bool IsBase64Formatted(string input)
        {
            try
            {
                Convert.FromBase64String(input);
                return true;
            }
            catch
            {
                return false;
            }
        }
    }
}