AES加密，解密方法

加密：

View Code

//加密，docPath:要加密的檔案路徑，strKey:秘鑰public static void Encrypt(string docPath, string strKey){    //區塊編碼器演算法    var fs = new FileStream(docPath, FileMode.Open);    byte[] buffer = new byte[fs.Length];    fs.Read(buffer, 0, buffer.Length);//得到需要加密的位元組數組        //設定密鑰,密鑰向量，兩個一樣，都是16個byte    var rDel = new RijndaelManaged();    var key = Encoding.UTF8.GetBytes(strKey);    rDel.Key = key;    rDel.Mode = CipherMode.ECB;    rDel.Padding = PaddingMode.PKCS7;    ICryptoTransform cTransform = rDel.CreateEncryptor();    byte[] cipherBytes = cTransform.TransformFinalBlock(buffer, 0, buffer.Length);    var fsEncrypt = new FileStream(docPath + "ENC", FileMode.Create, FileAccess.Write);    fsEncrypt.Write(cipherBytes, 0, cipherBytes.Length);    fsEncrypt.Close();    fsEncrypt.Dispose();    fs.Close();    fs.Dispose();}

解密：

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//解密，fileIn:解密的檔案路徑，fileOut:解密後的檔案存放路徑,strKey:秘鑰public static void Decrypt(string fileIn, string fileOut, string strKey){    var fsIn = new FileStream(fileIn, FileMode.Open, FileAccess.Read);    var fsOut = new FileStream(fileOut, FileMode.OpenOrCreate, FileAccess.Write);    var rDel = new RijndaelManaged();    var key = Encoding.UTF8.GetBytes(strKey);    rDel.Key = key;    rDel.Mode = CipherMode.ECB;    rDel.Padding = PaddingMode.PKCS7;    var cs = new CryptoStream(fsOut, rDel.CreateDecryptor(), CryptoStreamMode.Write);    var bufferLen = 4096;    var buffer = new byte[bufferLen];    int bytesRead;    do    {        bytesRead = fsIn.Read(buffer, 0, bufferLen);        cs.Write(buffer, 0, bytesRead);    } while (bytesRead != 0);    cs.Close();    fsIn.Close();    fsIn.Dispose();    fsOut.Dispose();}