(DataFlex) FTP Connect, Examine Server Certificate, and then Authenticate

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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoFtp
    Boolean iSuccess
    Variant vServerCert
    Handle hoServerCert
    String sTemp1
    Boolean bTemp1

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

    Get Create (RefClass(cComChilkatFtp2)) To hoFtp
    If (Not(IsComObjectCreated(hoFtp))) Begin
        Send CreateComObject of hoFtp
    End

    Set ComHostname Of hoFtp To "www.authtls-ftps-server.com"
    Set ComUsername Of hoFtp To "FTP_LOGIN"
    Set ComPassword Of hoFtp To "FTP_PASSWORD"
    Set ComAuthTls Of hoFtp To True
    Set ComPort Of hoFtp To 21

    // Connect to the FTP server using explicit TLS (AUTH TLS).
    Get ComConnectOnly Of hoFtp To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Get the FTP server's certificate.
    Get ComGetSslServerCert Of hoFtp To vServerCert
    If (IsComObject(vServerCert)) Begin
        Get Create (RefClass(cComChilkatCert)) To hoServerCert
        Set pvComObject Of hoServerCert To vServerCert
    End
    Get ComLastMethodSuccess Of hoFtp To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // 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.
    Get ComLoginAfterConnectOnly Of hoFtp To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

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

    Get ComDisconnect Of hoFtp To iSuccess
    Showln "Success."


End_Procedure