Secure File Transfer Protocol (SFTP) ensures secure file transfer mechanism using a reliable data stream such as SSH2. It is widely used as the standard file transfer protocol, offering end-to-end encryption for data protection during a transfer.

The Secure File Transfer Protocol is an essential tool for secure file transfers over a reliable data stream, such as SSH. It is the standard file transfer protocol for use with the SSH2 protocol. The wodSFTPdll library implements the client-side of this protocol, making it reliable and easy to use. This protocol is designed to primarily provide file transfer, but it also offers more general file system access on the remote server in a secure manner.
The SFTP protocol assumes that it is running on a secure channel, which is implemented in wodSFTPdll. This means that no plain text passwords or file information is exposed to the network. This library implements a protocol that is also used in the well-known SCP (Secure Copy) command on UNIX systems. The SCP client opens an SFTP connection with the server for file transfer. This method is much better than calling RCP over an SSH connection.
wodSFTPdll supports the most important PutFile and GetFile methods, which are used for file uploading and downloading, but it also supports the following features:
- PutData and GetData for copying string variables to/from remote files.
- MakeDir and RemoveDir for creating and deleting directories.
- DeleteFile to delete files on the server.
- ListItems event to list files in some directory on the remote server.
- GetAttributes and SetAttributes to retrieve and set attributes for the file or directory.
- Resume property to resume broken transfers.
- Blocking mode to execute methods and wait until they are completed.
- Password and PublicKey properties that determine the type of authentication with the server.
- ASCII and Binary file transfers to handle different data types.
- Done event that is fired when executed methods are completed, making it a perfect place to initiate a new command.
Overall, with its reliable and secure file transfers, wodSFTPdll is an excellent choice for any programmer or developer who needs to transfer files in a secure manner.
Version 3.8.5:
3.8.5 January 15, 2018
Updated OpenSSL to 1.0.2n
Version 3.8.3:
3.6.2 March 14, 2013
* Significant SFTP upload and download speed increase
Version 3.8.0:
3.6.2 March 14, 2013
* Significant SFTP upload and download speed increase
Version 3.6.2:
3.6.2 March 14, 2013
* Significant SFTP upload and download speed increase
Version 3.5.5:
3.5.5 April 4, 2011
* Fixed potential crash under heavy load when Disconnect method was called inside component's event
* KeepAlives property
Version 3.5.2:
3.5.2 February 12, 2010
* Fixed possible access violation with WS_FTP server in ListDir/ListNames
Version 3.5.1:
3.5.1 January 21, 2010
* Distribution now contains x86 and x64 binaries
3.5.0 November 12, 2009
* FIPS 140-2 enabled library can now be specified as external DLL,
through FIPS property.
Version 3.2.1:
3.2.1 August 23, 2007
* Fix for server that don't provide information about remote file size,
so download failed. Now download will work but progress
event will not show correct information (since 'Total' is unknown)
Version 3.2.1.0:
3.0.5 October 4, 2006
* Fix in ListDir method that could generate access violation if remote system
had files that were really old (before 1970)
Version 3.2.0.0:
3.0.5 October 4, 2006
* Fix in ListDir method that could generate access violation if remote system
had files that were really old (before 1970)