Crypto++ 7.0 Free C++ class library of cryptographic schemes

gost.h
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1 // gost.h - originally written and placed in the public domain by Wei Dai
2
3 /// \file gost.h
4 /// \brief Classes for the GIST block cipher
5
6 #ifndef CRYPTOPP_GOST_H
7 #define CRYPTOPP_GOST_H
8
9 #include "seckey.h"
10 #include "secblock.h"
11
12 NAMESPACE_BEGIN(CryptoPP)
13
14 /// \brief GOST block cipher information
15 /// \since Crypto++ 2.1
16 struct GOST_Info : public FixedBlockSize<8>, public FixedKeyLength<32>
17 {
18 CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "GOST";}
19 };
20
21 /// \brief GOST block cipher
22 /// \sa <a href="http://www.cryptopp.com/wiki/GOST">GOST</a>
23 /// \since Crypto++ 2.1
24 class GOST : public GOST_Info, public BlockCipherDocumentation
25 {
26 /// \brief GOST block cipher default operation
27 class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<GOST_Info>
28 {
29 public:
30 void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
31
32 protected:
33 static void PrecalculateSTable();
34
35 static const byte sBox[8][16];
36 static volatile bool sTableCalculated;
37 static word32 sTable[4][256];
38
39 FixedSizeSecBlock<word32, 8> m_key;
40 };
41
42 /// \brief GOST block cipher encryption operation
43 class CRYPTOPP_NO_VTABLE Enc : public Base
44 {
45 public:
46 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
47 };
48
49 /// \brief GOST block cipher decryption operation
50 class CRYPTOPP_NO_VTABLE Dec : public Base
51 {
52 public:
53 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
54 };
55
56 public:
57 typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
58 typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
59 };
60
61 typedef GOST::Encryption GOSTEncryption;
62 typedef GOST::Decryption GOSTDecryption;
63
64 NAMESPACE_END
65
66 #endif
FixedKeyLength
Inherited by keyed algorithms with fixed key length.
Definition: seckey.h:124
BlockCipherDocumentation
Provides Encryption and Decryption typedefs used by derived classes to implement a block cipher...
Definition: seckey.h:398
secblock.h
Classes and functions for secure memory allocations.
FixedBlockSize
Inherited by algorithms with fixed block size.
Definition: seckey.h:40
seckey.h
Classes and functions for implementing secret key algorithms.
BlockCipherFinal< ENCRYPTION, Enc >
GOST_Info
GOST block cipher information.
Definition: gost.h:16
FixedSizeSecBlock< word32, 8 >
GOST
GOST block cipher.
Definition: gost.h:24
BlockCipherImpl
Provides a base implementation of Algorithm and SimpleKeyingInterface for block ciphers.
Definition: seckey.h:305
CryptoPP
Crypto++ library namespace.
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:293