Crypto++ 8.9 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
BlockCipherFinal< ENCRYPTION, Enc >
BlockCipherImpl
Provides a base implementation of Algorithm and SimpleKeyingInterface for block ciphers.
Definition: seckey.h:306
FixedBlockSize
Inherited by algorithms with fixed block size.
Definition: seckey.h:41
FixedKeyLength
Inherited by keyed algorithms with fixed key length.
Definition: seckey.h:125
FixedSizeSecBlock< word32, 8 >
GOST
GOST block cipher.
Definition: gost.h:25
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:327
word32
unsigned int word32
32-bit unsigned datatype
Definition: config_int.h:72
CryptoPP
Crypto++ library namespace.
secblock.h
Classes and functions for secure memory allocations.
seckey.h
Classes and functions for implementing secret key algorithms.
BlockCipherDocumentation
Provides Encryption and Decryption typedefs used by derived classes to implement a block cipher.
Definition: seckey.h:399
GOST_Info
GOST block cipher information.
Definition: gost.h:17