(VB.NET) AWS Transfer for SFTP (Amazon S3)

Once you've setup your AWS Transfer for SFTP in the AWS Console, interacting with it is no different than any other SSH/SFTP server. AWS will provide a private key in PEM format. It is used for authentication (instead of a password).

For more information, see https://docs.aws.amazon.com/transfer/latest/userguide/getting-started-use-the-service.html

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim sftp As New Chilkat.SFtp

' Connect to the AWS SFTP server.
' Change the domain to your value.
Dim domain As String = "s-123456df999999fab.server.transfer.eu-west-2.amazonaws.com"
Dim port As Integer = 22
Dim success As Boolean = sftp.Connect(domain,port)
If (success = False) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Load your AWS SFTP private key PEM file..
Dim sshKey As New Chilkat.SshKey
Dim keyText As String = sshKey.LoadText("qa_data/pem/s3_sftp_privateKey.pem")
If (sshKey.LastMethodSuccess <> True) Then
    Debug.WriteLine(sshKey.LastErrorText)
    Exit Sub
End If

success = sshKey.FromOpenSshPrivateKey(keyText)
If (success = False) Then
    Debug.WriteLine(sshKey.LastErrorText)
    Exit Sub
End If


' Authenticate with the SSH server using the private key.
success = sftp.AuthenticatePk("myUsername",sshKey)
If (success = False) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' After authenticating, the SFTP subsystem must be initialized:
success = sftp.InitializeSftp()
If (success = False) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Upload from the local file to the SSH server.
' Important -- the remote filepath is the 1st argument,
' the local filepath is the 2nd argument;
Dim remoteFilePath As String = "hamlet.xml"
Dim localFilePath As String = "c:/temp/hamlet.xml"

success = sftp.UploadFileByName(remoteFilePath,localFilePath)
If (success = False) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Success.")