ERROR invalid key format in .Net SFTP connection

Question

I am moving an existing win service to staging server. I have only exe file of the win service.

When i start the service, it's throwing "invalid key format" error.

I analysed the exe file using a reflector and found that "PrivateKey" assigned to the "SFTP" object is throwing the error. code is given below:

SFTPInfo info=new SFTPInfo();
DataRow current = (DataRow)enumerator.Current;
info.Server = Conversions.ToString(current["SSHServer"]);
info.Login = Conversions.ToString(current["SSHLogin"]);
info.Key = (byte[])current["SSHKey"];

Where SSHKey is from the DB table and it's in binary format (converted .prk file to binary)

How i can generate a valid private key and configue it?

How i can generate a valid .prk file. This is a road block issue, please help me. — Sreekanth Mohan
– Sreekanth Mohan, Commented Nov 22, 2012 at 4:37

Sreekanth Mohan · Accepted Answer · 2013-02-19 07:53:30Z

1

We can use PUTTYGEN to generate a private/public key pair.

Steps are:

Open Putty Key Generator
Click on the Conversions menu and select "Import Key"
Select the key you wish to import and click on the "Open" button.
Click on the “Save Public Key” button.
Name the key and click on the "Save" button

Happy Programing... :)

answered Feb 19, 2013 at 7:53

Sreekanth Mohan

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