(Delphi DLL) Find Certificate for Email Encryption

Demonstrates finding the recipient's certificate in the Windows certificate store and using it to send encrypted email.

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, MailMan, Cert, Email;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
mailman: HCkMailMan;
email: HCkEmail;
recipientEmailAddr: PWideChar;
cert: HCkCert;

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

mailman := CkMailMan_Create();

// Set the SMTP server.
CkMailMan_putSmtpHost(mailman,'smtp.example.com');

// Create a new email object
email := CkEmail_Create();

CkEmail_putSubject(email,'This email is encrypted');
CkEmail_putBody(email,'This is a digitally encrypted mail');
CkEmail_putFrom(email,'Joe <joe@example.com>');
// Emails are encrypted using the recipient's certificate.
recipientEmailAddr := 'jane@example2.com';
CkEmail_AddTo(email,'Jane',recipientEmailAddr);

// Indicate that the email is to be sent encrypted.
CkEmail_putSendEncrypted(email,True);

// This example demonstrates finding the email encryption certificate
// on a Windows system where the certificate is stored in the Windows 
// certificate store.

cert := CkCert_Create();
// The recipient's certificate is used to encrypt.
// (Because the recipient is the only one in possession of the private key to decrypt.)
success := CkCert_LoadByEmailAddress(cert,recipientEmailAddr);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

// Specify the certificate to be used for encryption.
success := CkEmail_SetEncryptCert(email,cert);

success := CkMailMan_SendEmail(mailman,email);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
  end
else
  begin
    Memo1.Lines.Add('Encrypted Mail Sent!');
  end;

CkMailMan_Dispose(mailman);
CkEmail_Dispose(email);
CkCert_Dispose(cert);

end;