Pascal (Lazarus/Delphi)

PBES2 Password-Based Encryption

See more Encryption Examples

Demonstrates PBES2 encryption Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Crypt2;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  crypt: TCrypt2;
  plainText: string;
  encryptedText: string;
  decryptedText: string;

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

  crypt := TCrypt2.Create;

  //  Set properties for PBES2 encryption:

  //  When the encryption algorithm is set to "pbes2",
  //  Chilkat will automatically derive the actual secret key using PBKDF2 and
  //  the specified paramters: password, salt, iteration count, hash function, and desired key length.

  crypt.CryptAlgorithm := 'pbes2';
  crypt.PbesPassword := 'mySecretPassword';

  //  Set the underlying PBE algorithm (and key length):
  crypt.PbesAlgorithm := 'aes';
  crypt.KeyLength := 256;

  crypt.SetEncodedIV('000102030405060708090A0B0C0D0E0F','hex');

  //  Give it some salt:
  crypt.SetEncodedSalt('0102030405060708','hex');

  //  A higher iteration count makes the algorithm more
  //  computationally expensive and therefore exhaustive
  //  searches (for breaking the encryption) is more difficult:
  crypt.IterationCount := 1024;

  //  A hash algorithm needs to be set for PBES2:
  crypt.HashAlgorithm := 'sha256';

  //  Indicate that the encrypted bytes should be returned
  //  as a hex string:
  crypt.EncodingMode := 'hex';

  plainText := 'To be encrypted.';

  encryptedText := crypt.EncryptStringENC(plainText);

  WriteLn(encryptedText);

  //  Now decrypt:
  decryptedText := crypt.DecryptStringENC(encryptedText);

  WriteLn(decryptedText);


  crypt.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.