(Delphi DLL) Use HTTPS Client Certificate from .cer and .key Files

Demonstrates how to load a cert + private key from .cer and .key (base64) files and use it for mutual TLS authentication (client-side certificate).

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, BinData, PrivateKey, Cert;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
cert: HCkCert;
privKey: HCkPrivateKey;
success: Boolean;
bd: HCkBinData;

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

http := CkHttp_Create();

cert := CkCert_Create();
privKey := CkPrivateKey_Create();

// Load any type of certificate (.cer, .p7b, .pem, etc.) by calling LoadFromFile.
success := CkCert_LoadFromFile(cert,'qa_data/certs/sample_cert_a.cer');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

// Load the private key.
bd := CkBinData_Create();
success := CkBinData_LoadFile(bd,'qa_data/certs/sample_key_a.key');
success := CkPrivateKey_LoadAnyFormat(privKey,bd,'privateKeyPasswordIfNecessary');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(privKey));
    Exit;
  end;

// Associate the private key with the cert.
success := CkCert_SetPrivateKey(cert,privKey);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

// Set the certificate to be used for mutual TLS authentication
// (i.e. sets the client-side certificate for two-way TLS authentication)
success := CkHttp_SetSslClientCert(http,cert);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// At this point, the HTTP object instance is setup with the client-side cert, and any SSL/TLS
// connection will automatically use it if the server demands a client-side cert.

CkHttp_Dispose(http);
CkCert_Dispose(cert);
CkPrivateKey_Dispose(privKey);
CkBinData_Dispose(bd);

end;