Botan
1.11.15
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00001 /* 00002 * RC5 00003 * (C) 1999-2007 Jack Lloyd 00004 * 00005 * Botan is released under the Simplified BSD License (see license.txt) 00006 */ 00007 00008 #ifndef BOTAN_RC5_H__ 00009 #define BOTAN_RC5_H__ 00010 00011 #include <botan/block_cipher.h> 00012 00013 namespace Botan { 00014 00015 /** 00016 * RC5 00017 */ 00018 class BOTAN_DLL RC5 : public Block_Cipher_Fixed_Params<8, 1, 32> 00019 { 00020 public: 00021 void encrypt_n(const byte in[], byte out[], size_t blocks) const; 00022 void decrypt_n(const byte in[], byte out[], size_t blocks) const; 00023 00024 void clear(); 00025 std::string name() const; 00026 BlockCipher* clone() const { return new RC5(rounds); } 00027 00028 /** 00029 * @param rounds the number of RC5 rounds to run. Must be between 00030 * 8 and 32 and a multiple of 4. 00031 */ 00032 RC5(size_t rounds); 00033 private: 00034 void key_schedule(const byte[], size_t); 00035 00036 size_t rounds; 00037 secure_vector<u32bit> S; 00038 }; 00039 00040 } 00041 00042 #endif