AES Encryption to Match PHP's Mcrypt Extension

Demonstrates how to match AES encryption results with PHP's mcrypt extension.

Please refer to this discussion about PHP AES Encryption. The code here matches the PHP mcrypt results on that page.

Download Chilkat Crypt ActiveX

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATCRYPT2Lib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: TChilkatCrypt2;
success: Integer;
ivAscii: String;
keyAscii: String;
plainText: String;
cipherText: String;

begin
crypt := TChilkatCrypt2.Create(Self);

success := crypt.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    ShowMessage('Crypt component unlock failed');

  end;

//  AES is also known as Rijndael.
crypt.CryptAlgorithm := 'aes';

//  CipherMode may be "ecb" or "cbc"
crypt.CipherMode := 'cbc';

//  KeyLength may be 128, 192, 256
crypt.KeyLength := 256;

//  Pad with NULL bytes (PHP pads with NULL bytes)
crypt.PaddingScheme := 3;

//  EncodingMode specifies the encoding of the output for
//  encryption, and the input for decryption.
//  It may be "hex", "url", "base64", or "quoted-printable".
crypt.EncodingMode := 'hex';

ivAscii := '1234567890123456';
crypt.SetEncodedIV(ivAscii,'ascii');

//  The secret key must equal the size of the key.  For
//  256-bit encryption, the binary secret key is 32 bytes.
//  For 128-bit encryption, the binary secret key is 16 bytes.
keyAscii := '12345678901234561234567890123456';
crypt.SetEncodedKey(keyAscii,'ascii');

plainText := 'The quick brown fox jumped over the lazy dog';

cipherText := crypt.EncryptStringENC(plainText);
ShowMessage(cipherText);

//  Do 128-bit AES encryption:
crypt.KeyLength := 128;
keyAscii := '1234567890123456';
crypt.SetEncodedKey(keyAscii,'ascii');

cipherText := crypt.EncryptStringENC(plainText);
ShowMessage(cipherText);

//  -------
//  Results
//  -------
//  You may use these as test vectors for testing your AES implementations...
// 
//  ------------------------
//  256-bit key, CBC mode
//  ------------------------
//  IV = '1234567890123456' 
//   (hex: 31323334353637383930313233343536)
//  Key = '12345678901234561234567890123456' 
//   (hex: 3132333435363738393031323334353631323334353637383930313233343536)
//  PlainText:
//   'The quick brown fox jumped over the lazy dog'
	// CipherText(hex):
//   2fddc3abec692e1572d9b7d629172a05caf230bc7c8fd2d26ccfd65f9c54526984f7cb1c4326ef058cd7bee3967299e3

// 
//  ------------------------
//  128-bit key, CBC mode
//  ------------------------
//  IV = '1234567890123456' 
//   (hex: 31323334353637383930313233343536)
//  Key = '1234567890123456' 
//   (hex: 31323334353637383930313233343536)
//  PlainText:
//   'The quick brown fox jumped over the lazy dog'
	// CipherText(hex):
//   f78176ae8dfe84578529208d30f446bbb29a64dc388b5c0b63140a4f316b3f341fe7d3b1a3cc5113c81ef8dd714a1c99

end;