Delphi DLL

AES CFB Mode Encryption

See more Encryption Examples

Demonstrates how to encrypt using AES CFB (Cipher Feedback) mode. Delphi 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;
ivHex: PWideChar;
keyHex: PWideChar;
encStr: PWideChar;
decrypt: HCkCrypt2;
decStr: PWideChar;

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

crypt := CkCrypt2_Create();

CkCrypt2_putCryptAlgorithm(crypt,'aes');
CkCrypt2_putCipherMode(crypt,'cfb');
CkCrypt2_putKeyLength(crypt,256);

// EncodingMode specifies the encoding of the output for
// encryption, and the input for decryption.
// It may be "hex", "url", "base64", "quoted-printable", or many other choices.
CkCrypt2_putEncodingMode(crypt,'hex');

ivHex := '000102030405060708090A0B0C0D0E0F';
CkCrypt2_SetEncodedIV(crypt,ivHex,'hex');

// The secret key must equal the size of the key.  For
// 256-bit encryption, the binary secret key is 32 bytes.
keyHex := '603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4';
CkCrypt2_SetEncodedKey(crypt,keyHex,'hex');

// Encrypt a string...
encStr := CkCrypt2__encryptStringENC(crypt,'Good night, good night! parting is such sweet sorrow, That I shall say good night till it be morrow. --  William Shakespeare');
Memo1.Lines.Add(encStr);

decrypt := CkCrypt2_Create();

CkCrypt2_putCryptAlgorithm(decrypt,'aes');
CkCrypt2_putCipherMode(decrypt,'cfb');
CkCrypt2_putKeyLength(decrypt,256);
CkCrypt2_putEncodingMode(decrypt,'hex');
CkCrypt2_SetEncodedIV(decrypt,ivHex,'hex');
CkCrypt2_SetEncodedKey(decrypt,keyHex,'hex');

// Now decrypt:
decStr := CkCrypt2__decryptStringENC(decrypt,encStr);
Memo1.Lines.Add(decStr);

CkCrypt2_Dispose(crypt);
CkCrypt2_Dispose(decrypt);

end;