Subject: OpenSSH_6.7p1 - problems with algorithm
Date: 2015-11-13 13:14:49
From: Finn Bidstrup
Source: openssh-6-7p1-problems-algorithm
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 Hello Component pro,

  

 My company have purchased  the ”Ultimate SFTP for .NET” about 3 years ago, and I use the component in my Visual Studio projects and it works fine. I am very content with the product.

 My knowledge, however, to SFTP transfer protocols, algorithms and ciphers is non existing I’m afraid. That’s why your component comes in handy J

 Recently, trying to connect to a new SFTP-server in code, I got this error: “The client and server have no common algorithms”. My code looks like this:

 using Atp.Net;

 client.Connect(IpAdresse, Portnumber);

 client.Authenticate(LogonUser, Password);

 client.SetCurrentDirectory(StiTargetFolder);

 client.UploadFile(Sourcefolder + GammeltFilNavn, NytFilnavn);

 client.Disconnect();

  

 Normally it works, but I was told that the specific server, I’m trying to connect to, runs “OpenSSH_6.7p1” and does not support unsafe algorithms - in particular, CBC ciphers and arcfour.

  

 I have no idea what that means, and tried to find some information in your web-site, and came across this: http://www.componentpro.com/doc/sftp/Changing-Encryption-Algorithm.htm. But the code example includes a “using ComponentPro.Net”, which make me think that I do not have the right version of your component, because I only am able to use a “using Atp.Net”? The “using Atp.Net” allows me to use this method: “AllowedEncryptionAlgorithms” is that a way to come across the problem?

  

 Dear Component pro, I would be very happy If you would answer the following questions:

 1: Is it possible for me to solve the problem with my present version of ”Ultimate SFTP for .NET”?  If YEAS: would you supply me with some code in c# that works connection to the specific server?

 2: Do I need to upgrade or purchase any other component?  If YEAS: would you tell me how, AND supply me with some code in c# that works connection to the specific server?

  

 Thanks in advance.

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