(Delphi ActiveX) Duplicate openssl smime -encrypt -binary -aes-256-cbc -in some_file.dat -out some_file.dat.enc -outform DER cert.crt

Demonstrates how to encrypt to binary DER using 256-bit AES (CBC mode) as the underlying symmetric encryption algorithm, to produce PKCS7 enveloped data (binary DER).

Duplicates the following openssl command:

openssl smime -encrypt -binary -aes-256-cbc -in some_file.dat -out some_file.dat.enc -outform DER cert.crt

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
cert: TChilkatCert;
success: Integer;
bd: TChilkatBinData;
crypt: TChilkatCrypt2;

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

cert := TChilkatCert.Create(Self);
success := cert.LoadFromFile('qa_data/openssl/EE.cer');
if (success = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

bd := TChilkatBinData.Create(Self);
success := bd.LoadFile('qa_data/openssl/hello.txt');
// Assuming success..

crypt := TChilkatCrypt2.Create(Self);
success := crypt.SetEncryptCert(cert.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(crypt.LastErrorText);
    Exit;
  end;

crypt.CryptAlgorithm := 'PKI';

// Indicate the underlying symmetric encryption to be used:
crypt.Pkcs7CryptAlg := 'aes';
crypt.KeyLength := 256;
crypt.CipherMode := 'cbc';

success := crypt.CkEncryptFile('qa_data/openssl/hello.txt','qa_output/hello.txt.enc');
if (success = 0) then
  begin
    Memo1.Lines.Add(crypt.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Success.');
end;