(Delphi DLL) Find a Certificate by it's SHA-1 Thumbprint

See more Cert Store Examples

Note: This example requires Chilkat v10.1.2 or later.

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, Cert, CertStore, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
certStore: HCkCertStore;
thumbprint: PWideChar;
bReadOnly: Boolean;
success: Boolean;
json: HCkJsonObject;
cert: HCkCert;
certStorePem: HCkCertStore;

begin
certStore := CkCertStore_Create();

thumbprint := '12c1dd8015f3f03f7b1fa619dc24e2493ca8b4b2';

// This opens the Current User certificate store on Windows,
// On MacOS and iOS it opens the default Keychain.
bReadOnly := True;
success := CkCertStore_OpenCurrentUserStore(certStore,bReadOnly);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCertStore__lastErrorText(certStore));
    Exit;
  end;

// Find the certificate having a specific SHA1 thumbprint.
json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'thumbprint',thumbprint);

cert := CkCert_Create();
success := CkCertStore_FindCert(certStore,json,cert);
if (success = False) then
  begin
    Memo1.Lines.Add('Failed to find the certificate.');
    Exit;
  end;

Memo1.Lines.Add('Found: ' + CkCert__subjectCN(cert));

// -------------------------------------------------------------------------------------
// Alternatively, one could load a certificate store object with certs from a PEM file,
// and do the same thing..
certStorePem := CkCertStore_Create();

success := CkCertStore_LoadPemFile(certStorePem,'pemFiles/certificates.pem');
if (success = False) then
  begin
    Memo1.Lines.Add(CkCertStore__lastErrorText(certStorePem));
    Exit;
  end;

success := CkCertStore_FindCert(certStore,json,cert);
if (success = False) then
  begin
    Memo1.Lines.Add('Failed to find the certificate.');
    Exit;
  end;

Memo1.Lines.Add('Found: ' + CkCert__subjectCN(cert));

CkCertStore_Dispose(certStore);
CkJsonObject_Dispose(json);
CkCert_Dispose(cert);
CkCertStore_Dispose(certStorePem);

end;