1 /*
2 * IDEA
3 * (C) 1999-2007 Jack Lloyd
4 *
5 * Distributed under the terms of the Botan license
6 */
7 
8 #ifndef BOTAN_IDEA_H__
9 #define BOTAN_IDEA_H__
10 
11 #include <botan/block_cipher.h>
12 
13 namespace Botan {
14 
15 /**
16 * IDEA
17 */
18 class BOTAN_DLL IDEA : public Block_Cipher_Fixed_Params<8, 16>
19    {
20    public:
21       void encrypt_n(const byte in[], byte out[], size_t blocks) const;
22       void decrypt_n(const byte in[], byte out[], size_t blocks) const;
23 
clear()24       void clear() { zeroise(EK); zeroise(DK); }
name()25       std::string name() const { return "IDEA"; }
clone()26       BlockCipher* clone() const { return new IDEA; }
27 
IDEA()28       IDEA() : EK(52), DK(52) {}
29    protected:
30       /**
31       * @return const reference to encryption subkeys
32       */
get_EK()33       const SecureVector<u16bit>& get_EK() const { return EK; }
34 
35       /**
36       * @return const reference to decryption subkeys
37       */
get_DK()38       const SecureVector<u16bit>& get_DK() const { return DK; }
39 
40    private:
41       void key_schedule(const byte[], size_t);
42       SecureVector<u16bit> EK, DK;
43    };
44 
45 }
46 
47 #endif
48