B4X Requires Chilkat v11.0.0+

FTP Connect, Examine Server Certificate, and then Authenticate

See more FTP Examples

Demonstrates how to connect to an FTP server, examine the server's SSL/TLS certificate, and then, if it meets the application's security requirements, proceed to authenticate. B4X

Dim success As Boolean = False

'  This example assumes Chilkat Ftp2 to have been previously unlocked.
'  See Unlock Ftp2 for sample code.

Dim ftp As ChilkatFtp2
ftp.Initialize("ftp")

ftp.Hostname = "www.authtls-ftps-server.com"
ftp.Username = "FTP_LOGIN"
ftp.Password = "FTP_PASSWORD"
ftp.AuthTls = True
ftp.Port = 21

'  Connect to the FTP server using explicit TLS (AUTH TLS).
success = ftp.ConnectOnly
If success = False Then
    Log(ftp.LastErrorText)
    Return
End If


'  Get the FTP server's certificate.
Dim serverCert As ChilkatCert
serverCert.Initialize("serverCert")
success = ftp.GetServerCert(serverCert)
If success = False Then
    Log(ftp.LastErrorText)
    Return
End If


'  Now that we have the certificate, we can check it in any way we desire.
'  (See the online reference documentation for the certificate object's methods
'  and properties)...

'  Assuming the certificate is OK, proceed to authenticate with the FTP server.
success = ftp.LoginAfterConnectOnly
If success = False Then
    Log(ftp.LastErrorText)
    Return
End If


'  Proceed with uploading/download files, etc...
'  

ftp.Disconnect
Log("Success.")