(Delphi DLL) 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 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, BinData, Cert, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
cert: HCkCert;
success: Boolean;
bd: HCkBinData;
crypt: HCkCrypt2;

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

cert := CkCert_Create();
success := CkCert_LoadFromFile(cert,'qa_data/openssl/EE.cer');
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

bd := CkBinData_Create();
success := CkBinData_LoadFile(bd,'qa_data/openssl/hello.txt');
// Assuming success..

crypt := CkCrypt2_Create();
success := CkCrypt2_SetEncryptCert(crypt,cert);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCrypt2__lastErrorText(crypt));
    Exit;
  end;

CkCrypt2_putCryptAlgorithm(crypt,'PKI');

// Indicate the underlying symmetric encryption to be used:
CkCrypt2_putPkcs7CryptAlg(crypt,'aes');
CkCrypt2_putKeyLength(crypt,256);
CkCrypt2_putCipherMode(crypt,'cbc');

success := CkCrypt2_CkEncryptFile(crypt,'qa_data/openssl/hello.txt','qa_output/hello.txt.enc');
if (success = False) then
  begin
    Memo1.Lines.Add(CkCrypt2__lastErrorText(crypt));
    Exit;
  end;

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

CkCert_Dispose(cert);
CkBinData_Dispose(bd);
CkCrypt2_Dispose(crypt);

end;