/usr/include/crypto++/safer.h is in libcrypto++-dev 5.6.4-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | // safer.h - written and placed in the public domain by Wei Dai
//! \file safer.h
//! \brief Classes for the SAFER and SAFER-K block ciphers
#ifndef CRYPTOPP_SAFER_H
#define CRYPTOPP_SAFER_H
#include "seckey.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
//! \class SAFER
//! \brief SAFER block cipher
class SAFER
{
public:
//! \class Base
//! \brief SAFER block cipher default operation
class CRYPTOPP_NO_VTABLE Base : public BlockCipher
{
public:
unsigned int OptimalDataAlignment() const {return 1;}
void UncheckedSetKey(const byte *userkey, unsigned int length, const NameValuePairs ¶ms);
protected:
virtual bool Strengthened() const =0;
SecByteBlock keySchedule;
static const byte exp_tab[256];
static const byte log_tab[256];
};
//! \class Enc
//! \brief SAFER block cipher encryption operation
class CRYPTOPP_NO_VTABLE Enc : public Base
{
public:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
};
//! \class Dec
//! \brief SAFER block cipher decryption operation
class CRYPTOPP_NO_VTABLE Dec : public Base
{
public:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
};
};
//! \class SAFER_Impl
//! \brief SAFER block cipher default implementation
//! \tparam BASE SAFER::Enc or SAFER::Dec derived base class
//! \tparam INFO SAFER_Info derived class
//! \tparam STR flag indicating a strengthened implementation
//! \details SAFER-K is not strengthened; while SAFER-SK is strengthened.
template <class BASE, class INFO, bool STR>
class CRYPTOPP_NO_VTABLE SAFER_Impl : public BlockCipherImpl<INFO, BASE>
{
protected:
bool Strengthened() const {return STR;}
};
//! \class SAFER_K_Info
//! \brief SAFER-K block cipher information
struct SAFER_K_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13>
{
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "SAFER-K";}
};
//! \class SAFER_K
//! \brief SAFER-K block cipher
//! \sa <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
{
public:
typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_K_Info, false> > Encryption;
typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_K_Info, false> > Decryption;
};
//! \class SAFER_SK_Info
//! \brief SAFER-SK block cipher information
struct SAFER_SK_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13>
{
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "SAFER-SK";}
};
//! \class SAFER_SK
//! \brief SAFER-SK block cipher
//! \sa <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
{
public:
typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_SK_Info, true> > Encryption;
typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_SK_Info, true> > 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
|