1

我正在使用 VS 2010 (C#)。我正在尝试加密（解密）从 FTP 站点上传（下载）的文件。我认为这比在上传之前使用本地临时文件进行加密和在下载之后进行解密要快。我在下面的代码中收到错误。我似乎无法将各种流类型对齐（即 FileStream、CryptoStream 和 Stream）。任何帮助深表感谢。

public void Upload(byte[] desKey, byte[] desIV)
    {
        FtpWebRequest request = (FtpWebRequest)WebRequest.Create(Destination);
        request.Method = WebRequestMethods.Ftp.UploadFile;

        request.Credentials = new NetworkCredential(UserName, Password);

        FileStream fStream = File.Open(SourceFile, FileMode.OpenOrCreate);

        CryptoStream responseStream = new CryptoStream(fStream, new DESCryptoServiceProvider().CreateDecryptor(desKey, desIV), CryptoStreamMode.Read);

        byte[] fileContents = Encoding.UTF8.GetBytes(responseStream.ToString());

        responseStream.Close();  ///ERROR here
        request.ContentLength = fileContents.Length;

        Stream requestStream = request.GetRequestStream();
        requestStream.Write(fileContents, 0, fileContents.Length);
        requestStream.Close();

        FtpWebResponse response = (FtpWebResponse)request.GetResponse();
        response.Close();
    }

单元测试：

public void CleanEncryptUploadTest()
    {           
        FT.ftp uploadTest = new FT.ftp();

        uploadTest.UserName = "ausername";
        uploadTest.Password = "apassword";
        uploadTest.SourceFile = "D:\\Temp\\Test\\file.txt";
        uploadTest.Destination = "ftp://ftp.mysite.com/test2.txt";

        byte[] key = ASCIIEncoding.ASCII.GetBytes("TestZone");
        byte[] initVector = ASCIIEncoding.ASCII.GetBytes("TestZone");

        uploadTest.Upload(key, initVector);
    }
4

1 回答 1

0

这对我有用，我使用了一个内存流并将加密的字节写入它。还将加密流模式更改为写入。 

    public void Upload(byte[] key, byte[] iv)
    {
        byte[] fileContents;

        using (FileStream inputeFile = new FileStream(this.SourceFile, FileMode.Open, FileAccess.Read))
        {
            using (MemoryStream encryptedStream = new MemoryStream())
            {
                using (CryptoStream cryptostream = new CryptoStream(encryptedStream, new DESCryptoServiceProvider().CreateEncryptor(key, iv), CryptoStreamMode.Write))
                {
                    byte[] bytearrayinput = new byte[inputeFile.Length];
                    inputeFile.Read(bytearrayinput, 0, bytearrayinput.Length);
                    cryptostream.Write(bytearrayinput, 0, bytearrayinput.Length);
                    fileContents = encryptedStream.ToArray();
                }
            }
        }

        FtpWebRequest request = (FtpWebRequest)WebRequest.Create(this.Destination);
        request.Method = WebRequestMethods.Ftp.UploadFile;
        request.Credentials = new NetworkCredential(this.UserName, this.Password);
        request.ContentLength = fileContents.Length;

        Stream requestStream = request.GetRequestStream();
        requestStream.Write(fileContents, 0, fileContents.Length);
        requestStream.Close();

        FtpWebResponse response = (FtpWebResponse)request.GetResponse();
        response.Close();
    }
于 2012-10-27T12:05:03.963 回答