Delphi DLL

SSL Client Certificate

See more Socket/SSL/TLS Examples

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

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, JsonObject, Cert, CertStore, Socket;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
socket: HCkSocket;
certStore: HCkCertStore;
jsonCN: HCkJsonObject;
cert: HCkCert;
ssl: Boolean;
maxWaitMillisec: Integer;
sslServerHost: PWideChar;
sslServerPort: Integer;
receivedMsg: PWideChar;

begin
success := False;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

socket := CkSocket_Create();

// 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 := CkCertStore_Create();
// The 1st argument is the filename, the 2nd arg is the 
// PFX file's password:
success := CkCertStore_LoadPfxFile(certStore,'chilkat_secret.pfx','secret');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCertStore__lastErrorText(certStore));
    Exit;
  end;

// Find the certificate by the subject common name:
jsonCN := CkJsonObject_Create();
CkJsonObject_UpdateString(jsonCN,'CN','cert common name');

cert := CkCert_Create();
success := CkCertStore_FindCert(certStore,jsonCN,cert);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCertStore__lastErrorText(certStore));
    Exit;
  end;

success := CkSocket_SetSslClientCert(socket,cert);

ssl := True;
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 := CkSocket_Connect(socket,sslServerHost,sslServerPort,ssl,maxWaitMillisec);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(socket));
    Exit;
  end;

// Set maximum timeouts for reading an writing (in millisec)
CkSocket_putMaxReadIdleMs(socket,20000);
CkSocket_putMaxSendIdleMs(socket,20000);

// Send a "Hello Server! -EOM-" message:
success := CkSocket_SendString(socket,'Hello Server! -EOM-');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(socket));
    Exit;
  end;

// The server (in this example) is going to send a "Hello Client! -EOM-" 
// message.  Read it:
receivedMsg := CkSocket__receiveUntilMatch(socket,'-EOM-');
if (CkSocket_getLastMethodSuccess(socket) <> True) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(socket));
    Exit;
  end;

// Close the connection with the server
// Wait a max of 20 seconds (20000 millsec)
success := CkSocket_Close(socket,20000);

Memo1.Lines.Add(receivedMsg);

CkSocket_Dispose(socket);
CkCertStore_Dispose(certStore);
CkJsonObject_Dispose(jsonCN);
CkCert_Dispose(cert);

end;