1#ifndef CRYPTOPP_SAFER_H
2#define CRYPTOPP_SAFER_H
3
4/** \file
5*/
6
7#include "seckey.h"
8#include "secblock.h"
9
10NAMESPACE_BEGIN(CryptoPP)
11
12/// base class, do not use directly
13class SAFER
14{
15public:
16	class CRYPTOPP_NO_VTABLE Base : public BlockCipher
17	{
18	public:
19		unsigned int OptimalDataAlignment() const {return 1;}
20		void UncheckedSetKey(const byte *userkey, unsigned int length, const NameValuePairs &params);
21
22	protected:
23		virtual bool Strengthened() const =0;
24
25		SecByteBlock keySchedule;
26		static const byte exp_tab[256];
27		static const byte log_tab[256];
28	};
29
30	class CRYPTOPP_NO_VTABLE Enc : public Base
31	{
32	public:
33		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
34	};
35
36	class CRYPTOPP_NO_VTABLE Dec : public Base
37	{
38	public:
39		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
40	};
41};
42
43template <class BASE, class INFO, bool STR>
44class CRYPTOPP_NO_VTABLE SAFER_Impl : public BlockCipherImpl<INFO, BASE>
45{
46protected:
47	bool Strengthened() const {return STR;}
48};
49
50//! _
51struct SAFER_K_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13>
52{
53	static const char *StaticAlgorithmName() {return "SAFER-K";}
54};
55
56/// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-K">SAFER-K</a>
57class SAFER_K : public SAFER_K_Info, public SAFER, public BlockCipherDocumentation
58{
59public:
60	typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_K_Info, false> > Encryption;
61	typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_K_Info, false> > Decryption;
62};
63
64//! _
65struct SAFER_SK_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13>
66{
67	static const char *StaticAlgorithmName() {return "SAFER-SK";}
68};
69
70/// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-SK">SAFER-SK</a>
71class SAFER_SK : public SAFER_SK_Info, public SAFER, public BlockCipherDocumentation
72{
73public:
74	typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_SK_Info, true> > Encryption;
75	typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_SK_Info, true> > Decryption;
76};
77
78typedef SAFER_K::Encryption SAFER_K_Encryption;
79typedef SAFER_K::Decryption SAFER_K_Decryption;
80
81typedef SAFER_SK::Encryption SAFER_SK_Encryption;
82typedef SAFER_SK::Decryption SAFER_SK_Decryption;
83
84NAMESPACE_END
85
86#endif
87