(Delphi DLL) PBES2 Password-Based Encryption

See more Encryption Examples

For more information, see https://www.chilkatsoft.com/explaining_pbes2_encryption.asp

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, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: HCkCrypt2;
plainText: PWideChar;
encryptedText: PWideChar;
decryptedText: PWideChar;

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

crypt := CkCrypt2_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.

CkCrypt2_putCryptAlgorithm(crypt,'pbes2');
CkCrypt2_putPbesPassword(crypt,'mySecretPassword');

// Set the underlying PBE algorithm (and key length):
CkCrypt2_putPbesAlgorithm(crypt,'aes');
CkCrypt2_putKeyLength(crypt,256);

CkCrypt2_SetEncodedIV(crypt,'000102030405060708090A0B0C0D0E0F','hex');

// Give it some salt:
CkCrypt2_SetEncodedSalt(crypt,'0102030405060708','hex');

// A higher iteration count makes the algorithm more
// computationally expensive and therefore exhaustive
// searches (for breaking the encryption) is more difficult:
CkCrypt2_putIterationCount(crypt,1024);

// A hash algorithm needs to be set for PBES2:
CkCrypt2_putHashAlgorithm(crypt,'sha256');

// Indicate that the encrypted bytes should be returned
// as a hex string:
CkCrypt2_putEncodingMode(crypt,'hex');

plainText := 'To be encrypted.';

encryptedText := CkCrypt2__encryptStringENC(crypt,plainText);

Memo1.Lines.Add(encryptedText);

// Now decrypt:
decryptedText := CkCrypt2__decryptStringENC(crypt,encryptedText);

Memo1.Lines.Add(decryptedText);

CkCrypt2_Dispose(crypt);

end;