SSL Client Certificate

Demonstrates how to connect to an SSL server using a client-side certificate, send a simple message, receive a simple response, and disconnect.

Download Chilkat Socket ActiveX

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATCERTIFICATELib_TLB,
    CHILKATSOCKETLib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
socket: TChilkatSocket;
success: Integer;
certStore: CHILKATCERTIFICATELib_TLB.IChilkatCertStore;
cert: CHILKATSOCKETLib_TLB.IChilkatCert;
ssl: Integer;
maxWaitMillisec: Integer;
sslServerHost: String;
sslServerPort: Integer;
receivedMsg: String;

begin
socket := TChilkatSocket.Create(Self);

success := socket.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    ShowMessage('Failed to unlock component');
    Exit;
  end;

//  Create an instance of a certificate store object, load a PFX file,
//  locate the certificate we need, and use it for signing.
//  (a PFX file may contain more than one certificate.)
certStore := CoChilkatCertStore.Create();
//  The 1st argument is the filename, the 2nd arg is the
//  PFX file's password:
success := certStore.LoadPfxFile('chilkat_secret.pfx','secret');
if (success <> 1) then
  begin
    ShowMessage(certStore.LastErrorText);
    Exit;
  end;

cert := certStore.FindCertBySubjectCN('Chilkat Software, Inc.') As CHILKATSOCKETLib_TLB.IChilkatCert;
if (cert = nil ) then
  begin
    ShowMessage(certStore.LastErrorText);
    Exit;
  end;

socket.SetSslClientCert(cert As CHILKATSOCKETLib_TLB.IChilkatCert);

ssl := 1;
maxWaitMillisec := 20000;

//  The SSL server hostname may be an IP address, a domain name,
//  or "localhost".  You'll need to change this:

sslServerHost := '123.123.88.88';
sslServerPort := 8123;

//  Connect to the SSL server:
success := socket.Connect(sslServerHost,sslServerPort,ssl,maxWaitMillisec);
if (success <> 1) then
  begin
    ShowMessage(socket.LastErrorText);
    Exit;
  end;

//  Set maximum timeouts for reading an writing (in millisec)
socket.MaxReadIdleMs := 20000;
socket.MaxSendIdleMs := 20000;

//  Send a "Hello Server! -EOM-" message:
success := socket.SendString('Hello Server! -EOM-');
if (success <> 1) then
  begin
    ShowMessage(socket.LastErrorText);
    Exit;
  end;

//  The server (in this example) is going to send a "Hello Client! -EOM-"
//  message.  Read it:

receivedMsg := socket.ReceiveUntilMatch('-EOM-');
if (Length(receivedMsg) = 0 ) then
  begin
    ShowMessage(socket.LastErrorText);
    Exit;
  end;

//  Close the connection with the server
//  Wait a max of 20 seconds (20000 millsec)
socket.Close(20000);

ShowMessage(receivedMsg);
end;