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(Delphi DLL) FTP Connect, Examine Server Certificate, and then AuthenticateDemonstrates 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.
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Ftp2, Cert; ... procedure TForm1.Button1Click(Sender: TObject); var ftp: HCkFtp2; success: Boolean; serverCert: HCkCert; begin // This example assumes Chilkat Ftp2 to have been previously unlocked. // See Unlock Ftp2 for sample code. ftp := CkFtp2_Create(); CkFtp2_putHostname(ftp,'www.authtls-ftps-server.com'); CkFtp2_putUsername(ftp,'FTP_LOGIN'); CkFtp2_putPassword(ftp,'FTP_PASSWORD'); CkFtp2_putAuthTls(ftp,True); CkFtp2_putPort(ftp,21); // Connect to the FTP server using explicit TLS (AUTH TLS). success := CkFtp2_ConnectOnly(ftp); if (success <> True) then begin Memo1.Lines.Add(CkFtp2__lastErrorText(ftp)); Exit; end; // Get the FTP server's certificate. serverCert := CkFtp2_GetSslServerCert(ftp); if (CkFtp2_getLastMethodSuccess(ftp) <> True) then begin Memo1.Lines.Add(CkFtp2__lastErrorText(ftp)); Exit; 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. success := CkFtp2_LoginAfterConnectOnly(ftp); if (success <> True) then begin Memo1.Lines.Add(CkFtp2__lastErrorText(ftp)); Exit; end; // // Proceed with uploading/download files, etc... // CkFtp2_Disconnect(ftp); Memo1.Lines.Add('Success.'); CkFtp2_Dispose(ftp); end; |
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