Delphi ActiveX

PBES2 Password-Based Encryption

See more Encryption Examples

Demonstrates PBES2 encryption Delphi ActiveX

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
crypt: TChilkatCrypt2;
plainText: WideString;
encryptedText: WideString;
decryptedText: WideString;

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

crypt := TChilkatCrypt2.Create(Self);

// 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);

Memo1.Lines.Add(encryptedText);

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

Memo1.Lines.Add(decryptedText);
end;