(Delphi ActiveX) Use a Custom Set of Trusted Root Certificates

Demonstrates how to build a set of trusted root certificates to be used globally by all Chilkat classes.

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

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
trustedRoots: TChilkatTrustedRoots;
zip: TChilkatZip;
success: Integer;
entry: IChilkatZipEntry;
nextEntry: IChilkatZipEntry;
pemStr: WideString;
cert: TChilkatCert;
bHasMoreEntries: Integer;

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

trustedRoots := TChilkatTrustedRoots.Create(Self);

//  Indicate that we will NOT trust any pre-installed certificates on the system.
trustedRoots.TrustSystemCaRoots := 0;

// Thawte is a certificate authority that provides a .zip download of their
// root CA certificates:  https://www.thawte.com/roots/index.html
// The direct download link is: https://www.verisign.com/support/thawte-roots.zip
// Note: The above URLs are valid at the time of writing this example (29-May-2015).

// Assuming the .zip has already been downloaded, open it and load each .pem file into
// our trusted roots object.
zip := TChilkatZip.Create(Self);

// Open a .zip containing PEM files, among other things..
success := zip.OpenZip('qa_data/certs/thawte-roots.zip');
if (success <> 1) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

entry := zip.FirstMatchingEntry('*.pem');
if (zip.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add('No entries matched.');
    Exit;
  end;

cert := TChilkatCert.Create(Self);

bHasMoreEntries := 1;
while (bHasMoreEntries = 1) do
  begin

    Memo1.Lines.Add('Entry: ' + entry.FileName);

    // Get the PEM of the CA cert:
    pemStr := entry.UnzipToString(0,'utf-8');

    // Load it into a certificate object:
    success := cert.LoadPem(pemStr);
    if (success <> 1) then
      begin
        Memo1.Lines.Add(cert.LastErrorText);
      end;

    // Add it to the trusted roots.
    trustedRoots.AddCert(cert.ControlInterface);

    // The NextMatchingEntry method was added in v9.5.0.50
    nextEntry := entry.NextMatchingEntry('*.pem');
    bHasMoreEntries := entry.LastMethodSuccess;

    entry := nextEntry;
  end;

//  Activate the trusted roots globally for all Chilkat objects.
//  This call really shouldn't fail, so we're not checking the return value.
success := trustedRoots.Activate();
end;