Crypto++ 8.9 Free C++ class library of cryptographic schemes

blowfish.h
Go to the documentation of this file.
1 // blowfish.h - originally written and placed in the public domain by Wei Dai
2
3 /// \file blowfish.h
4 /// \brief Classes for the Blowfish block cipher
5
6 #ifndef CRYPTOPP_BLOWFISH_H
7 #define CRYPTOPP_BLOWFISH_H
8
9 #include "seckey.h"
10 #include "secblock.h"
11
12 NAMESPACE_BEGIN(CryptoPP)
13
14 /// \brief Blowfish block cipher information
15 struct Blowfish_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 4, 56>, public FixedRounds<16>
16 {
17 CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Blowfish";}
18 };
19
20 // <a href="http://www.cryptopp.com/wiki/Blowfish">Blowfish</a>
21
22 /// \brief Blowfish block cipher
23 /// \since Crypto++ 1.0
24 class Blowfish : public Blowfish_Info, public BlockCipherDocumentation
25 {
26 /// \brief Class specific implementation and overrides used to operate the cipher.
27 /// \details Implementations and overrides in \p Base apply to both \p ENCRYPTION and \p DECRYPTION directions
28 class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Blowfish_Info>
29 {
30 public:
31 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
32 void UncheckedSetKey(const byte *key_string, unsigned int keylength, const NameValuePairs &params);
33
34 private:
35 void crypt_block(const word32 in[2], word32 out[2]) const;
36
37 static const word32 p_init[ROUNDS+2];
38 static const word32 s_init[4*256];
39
40 FixedSizeSecBlock<word32, ROUNDS+2> pbox;
41 FixedSizeSecBlock<word32, 4*256> sbox;
42 };
43
44 public:
45 typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;
46 typedef BlockCipherFinal<DECRYPTION, Base> Decryption;
47 };
48
49 typedef Blowfish::Encryption BlowfishEncryption;
50 typedef Blowfish::Decryption BlowfishDecryption;
51
52 NAMESPACE_END
53
54 #endif
BlockCipherFinal
Provides class member functions to key a block cipher.
Definition: seckey.h:318
BlockCipherImpl
Provides a base implementation of Algorithm and SimpleKeyingInterface for block ciphers.
Definition: seckey.h:306
Blowfish
Blowfish block cipher.
Definition: blowfish.h:25
FixedBlockSize
Inherited by algorithms with fixed block size.
Definition: seckey.h:41
FixedRounds
Inherited by algorithms with fixed number of rounds.
Definition: seckey.h:53
FixedRounds< 16 >::ROUNDS
static const int ROUNDS
The number of rounds for the algorithm provided as a constant.
Definition: seckey.h:56
FixedSizeSecBlock< word32, ROUNDS+2 >
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:327
VariableKeyLength
Inherited by keyed algorithms with variable key length.
Definition: seckey.h:166
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
Blowfish_Info
Blowfish block cipher information.
Definition: blowfish.h:16