Create a WinZip compatible AES Encrypted Zip

Creates a WinZip compatible AES-encrypted .zip archive

Download Chilkat 32-bit Zip ActiveX (.msi) (includes objects for .zip, .gz, .bz2, and .Z)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    ChilkatZip2Lib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
zip: TChilkatZip2;
success: Integer;
recurse: Integer;

begin
zip := TChilkatZip2.Create(Self);

//  Any string unlocks the component for the 1st 30-days.
success := zip.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

success := zip.NewZip('/myZipDir/aes.zip');
if (success <> 1) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

//  Set properties to indicate that the Zip should be
//  AES encrypted.

//  A value of 4 indicates WinZip compatible AES encryption.
zip.Encryption := 4;

//  Key length can be 128, 192, or 256 bits.
zip.EncryptKeyLength := 128;

//  Set the password for AES encryption:
zip.EncryptPassword := 'myPassword';

//  Add a directory tree to be zipped.  (The files
//  are not compressed at this point -- only references
//  to the files and directories are added to the zip object.)
recurse := 1;
success := zip.AppendFiles('c:/temp/a/*',recurse);
if (success <> 1) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

//  Create the encrypted zip ("/myZipDir/aes.zip")
//  The path of the zip is what was originally passed
//  to the NewZip method (above).
success := zip.WriteZipAndClose();
if (success <> 1) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

ShowMessage('Created AES Encrypted Zip.');

end;