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(Visual FoxPro) 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

LOCAL loFtp
LOCAL lnSuccess
LOCAL loServerCert

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

loFtp = CreateObject('Chilkat_9_5_0.Ftp2')

loFtp.Hostname = "www.authtls-ftps-server.com"
loFtp.Username = "FTP_LOGIN"
loFtp.Password = "FTP_PASSWORD"
loFtp.AuthTls = 1
loFtp.Port = 21

* Connect to the FTP server using explicit TLS (AUTH TLS).
lnSuccess = loFtp.ConnectOnly()
IF (lnSuccess <> 1) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

* Get the FTP server's certificate.
loServerCert = loFtp.GetSslServerCert()
IF (loFtp.LastMethodSuccess <> 1) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

* 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.
lnSuccess = loFtp.LoginAfterConnectOnly()
IF (lnSuccess <> 1) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

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

loFtp.Disconnect()
? "Success."

RELEASE loFtp


 

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