diff options
Diffstat (limited to 'safer.h')
-rw-r--r-- | safer.h | 101 |
1 files changed, 101 insertions, 0 deletions
@@ -0,0 +1,101 @@ +#ifndef CRYPTOPP_SAFER_H +#define CRYPTOPP_SAFER_H + +/** \file +*/ + +#include "seckey.h" +#include "secblock.h" + +NAMESPACE_BEGIN(CryptoPP) + +/// base class, do not use directly +class SAFER +{ +public: + class Base : public BlockCipher + { + public: + unsigned int GetAlignment() const {return 1;} + void UncheckedSetKey(CipherDir dir, const byte *userkey, unsigned int length, unsigned nof_rounds); + + bool strengthened; + SecByteBlock keySchedule; + static const byte exp_tab[256]; + static const byte log_tab[256]; + }; + + class Enc : public Base + { + public: + void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; + }; + + class Dec : public Base + { + public: + void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; + }; +}; + +struct SAFER_K_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13> +{ + static const char *StaticAlgorithmName() {return "SAFER-K";} + static unsigned int DefaultRounds(unsigned int keylength) {return keylength == 8 ? 6 : 10;} +}; + +/// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-K">SAFER-K</a> +class SAFER_K : public SAFER_K_Info, public SAFER, public BlockCipherDocumentation +{ + class Enc : public BlockCipherBaseTemplate<SAFER_K_Info, SAFER::Enc> + { + public: + Enc() {strengthened = false;} + }; + + class Dec : public BlockCipherBaseTemplate<SAFER_K_Info, SAFER::Dec> + { + public: + Dec() {strengthened = false;} + }; + +public: + typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption; + typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption; +}; + +struct SAFER_SK_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13> +{ + static const char *StaticAlgorithmName() {return "SAFER-SK";} + static unsigned int DefaultRounds(unsigned int keylength) {return keylength == 8 ? 8 : 10;} +}; + +/// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-SK">SAFER-SK</a> +class SAFER_SK : public SAFER_SK_Info, public SAFER, public BlockCipherDocumentation +{ + class Enc : public BlockCipherBaseTemplate<SAFER_SK_Info, SAFER::Enc> + { + public: + Enc() {strengthened = true;} + }; + + class Dec : public BlockCipherBaseTemplate<SAFER_SK_Info, SAFER::Dec> + { + public: + Dec() {strengthened = true;} + }; + +public: + typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption; + typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption; +}; + +typedef SAFER_K::Encryption SAFER_K_Encryption; +typedef SAFER_K::Decryption SAFER_K_Decryption; + +typedef SAFER_SK::Encryption SAFER_SK_Encryption; +typedef SAFER_SK::Decryption SAFER_SK_Decryption; + +NAMESPACE_END + +#endif |