File: cham.h

package info (click to toggle)
libcrypto++ 8.2.0-2
  • links: PTS
  • area: main
  • in suites: experimental
  • size: 22,780 kB
  • sloc: cpp: 105,015; sh: 7,353; asm: 5,120; makefile: 316
file content (188 lines) | stat: -rw-r--r-- 7,080 bytes parent folder | download | duplicates (2)
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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
// cham.h - written and placed in the public domain by Kim Sung Hee and Jeffrey Walton
//          Based on "CHAM: A Family of Lightweight Block Ciphers for
//          Resource-Constrained Devices" by Bonwook Koo, Dongyoung Roh,
//          Hyeonjin Kim, Younghoon Jung, Dong-Geon Lee, and Daesung Kwon

/// \file cham.h
/// \brief Classes for the CHAM block cipher
/// \since Crypto++ 8.0

#ifndef CRYPTOPP_CHAM_H
#define CRYPTOPP_CHAM_H

#include "config.h"
#include "seckey.h"
#include "secblock.h"
#include "algparam.h"

#if (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86)
# define CRYPTOPP_CHAM_ADVANCED_PROCESS_BLOCKS 1
#endif

// Yet another SunStudio/SunCC workaround. Failed self tests
// in SSE code paths on i386 for SunStudio 12.3 and below.
#if defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x5120)
# undef CRYPTOPP_CHAM_ADVANCED_PROCESS_BLOCKS
#endif

NAMESPACE_BEGIN(CryptoPP)

/// \brief CHAM block cipher information
/// \since Crypto++ 8.0
struct CHAM64_Info : public FixedBlockSize<8>, public FixedKeyLength<16>
{
    /// \brief The algorithm name
    /// \returns the algorithm name
    /// \details StaticAlgorithmName returns the algorithm's name as a static
    ///   member function.
    static const std::string StaticAlgorithmName()
    {
        // Format is Cipher-Blocksize
        return "CHAM-64";
    }
};

/// \brief CHAM block cipher information
/// \since Crypto++ 8.0
struct CHAM128_Info : public FixedBlockSize<16>, public VariableKeyLength<16,16,32,16>
{
    /// \brief The algorithm name
    /// \returns the algorithm name
    /// \details StaticAlgorithmName returns the algorithm's name as a static
    ///   member function.
    static const std::string StaticAlgorithmName()
    {
        // Format is Cipher-Blocksize
        return "CHAM-128";
    }
};

/// \brief CHAM 64-bit block cipher
/// \details CHAM64 provides 64-bit block size. The valid key size is 128-bit.
/// \note Crypto++ provides a byte oriented implementation
/// \sa CHAM128, <a href="http://www.cryptopp.com/wiki/CHAM">CHAM</a>,
///   <a href="https://pdfs.semanticscholar.org/2f57/61b5c2614cffd58a09cc83c375a2b32a2ed3.pdf">
///   CHAM: A Family of Lightweight Block Ciphers for Resource-Constrained Devices</a>
/// \since Crypto++ 8.0
class CRYPTOPP_NO_VTABLE CHAM64 : public CHAM64_Info, public BlockCipherDocumentation
{
public:
    /// \brief CHAM block cipher transformation functions
    /// \details Provides implementation common to encryption and decryption
    /// \since Crypto++ 8.0
    class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<CHAM64_Info>
    {
    protected:
        void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs &params);
        std::string AlgorithmProvider() const;

        SecBlock<word16> m_rk;
        mutable FixedSizeSecBlock<word16, 4> m_x;
        unsigned int m_kw;
    };

    /// \brief Encryption transformation
    /// \details Enc provides implementation for encryption transformation. All key and block
    ///   sizes are supported.
    /// \since Crypto++ 8.0
    class CRYPTOPP_NO_VTABLE Enc : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;

#if CRYPTOPP_CHAM_ADVANCED_PROCESS_BLOCKS
        size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
    };

    /// \brief Decryption transformation
    /// \details Dec provides implementation for decryption transformation. All key and block
    ///   sizes are supported.
    /// \since Crypto++ 8.0
    class CRYPTOPP_NO_VTABLE Dec : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;

#if CRYPTOPP_CHAM_ADVANCED_PROCESS_BLOCKS
        size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
    };

    /// \brief CHAM64 encryption
    typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
    /// \brief CHAM64 decryption
    typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};

/// \brief CHAM64 encryption
typedef CHAM64::Encryption CHAM64Encryption;
/// \brief CHAM64 decryption
typedef CHAM64::Decryption CHAM64Decryption;

/// \brief CHAM 128-bit block cipher
/// \details CHAM128 provides 128-bit block size. The valid key size is 128-bit and 256-bit.
/// \note Crypto++ provides a byte oriented implementation
/// \sa CHAM64, <a href="http://www.cryptopp.com/wiki/CHAM">CHAM</a>,
///   <a href="https://pdfs.semanticscholar.org/2f57/61b5c2614cffd58a09cc83c375a2b32a2ed3.pdf">
///   CHAM: A Family of Lightweight Block Ciphers for Resource-Constrained Devices</a>
/// \since Crypto++ 8.0
class CRYPTOPP_NO_VTABLE CHAM128 : public CHAM128_Info, public BlockCipherDocumentation
{
public:
    /// \brief CHAM block cipher transformation functions
    /// \details Provides implementation common to encryption and decryption
    /// \since Crypto++ 8.0
    class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<CHAM128_Info>
    {
    protected:
        void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs &params);
        std::string AlgorithmProvider() const;

        SecBlock<word32> m_rk;
        mutable FixedSizeSecBlock<word32, 4> m_x;
        unsigned int m_kw;
    };

    /// \brief Encryption transformation
    /// \details Enc provides implementation for encryption transformation. All key and block
    ///   sizes are supported.
    /// \since Crypto++ 8.0
    class CRYPTOPP_NO_VTABLE Enc : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;

#if CRYPTOPP_CHAM_ADVANCED_PROCESS_BLOCKS
        size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
    };

    /// \brief Decryption transformation
    /// \details Dec provides implementation for decryption transformation. All key and block
    ///   sizes are supported.
    /// \since Crypto++ 8.0
    class CRYPTOPP_NO_VTABLE Dec : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;

#if CRYPTOPP_CHAM_ADVANCED_PROCESS_BLOCKS
        size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
    };

    /// \brief CHAM128 encryption
    typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
    /// \brief CHAM128 decryption
    typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};

/// \brief CHAM128 encryption
typedef CHAM128::Encryption CHAM128Encryption;
/// \brief CHAM128 decryption
typedef CHAM128::Decryption CHAM128Decryption;

NAMESPACE_END

#endif  // CRYPTOPP_CHAM_H