Delphi DEC library (Rijndael) encryption

Question

I am trying to use the DEC 3.0 library (Delphi Encryption Compedium Part I) to encrypt data in Delphi 7 and send it to a PHP script through POST, where I am dec

Answer 1

You are calling the TCipher.Create(const Password: String; AProtection: TProtection); constructor, which will compute a hash of the password before passing it to the Init method, which performs the standard key schedule of the implemented algorithm. To override this key derivation, use:

function EncryptMsgData(MsgData, Key: string): string;
var RCipher: TCipher_Rijndael;
begin
  RCipher:= TCipher_Rijndael.Create('', nil);
  RCipher.Init(Pointer(Key)^,Length(Key),nil);
  RCipher.Mode:= cmECB;
  Result:= RCipher.CodeString(MsgData, paEncode, fmtMIME64);
  RCipher.Free;

end;