57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
// blowfish.h - written and placed in the public domain by Wei Dai
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//! \file blowfish.h
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//! \brief Classes for the Blowfish block cipher
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#ifndef CRYPTOPP_BLOWFISH_H
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#define CRYPTOPP_BLOWFISH_H
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#include "seckey.h"
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#include "secblock.h"
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NAMESPACE_BEGIN(CryptoPP)
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//! \class Blowfish_Info
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//! \brief The cipher's key, iv, block size and name information.
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struct Blowfish_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 4, 56>, public FixedRounds<16>
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{
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static const char *StaticAlgorithmName() {return "Blowfish";}
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};
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// <a href="http://www.weidai.com/scan-mirror/cs.html#Blowfish">Blowfish</a>
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//! \class Blowfish
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//! \brief Provides Blowfish encryption and decryption
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class Blowfish : public Blowfish_Info, public BlockCipherDocumentation
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{
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//! \class Base
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//! \brief Class specific implementation and overrides used to operate the cipher.
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//! \details Implementations and overrides in \p Base apply to both \p ENCRYPTION and \p DECRYPTION directions
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class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Blowfish_Info>
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{
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public:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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void UncheckedSetKey(const byte *key_string, unsigned int keylength, const NameValuePairs ¶ms);
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private:
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void crypt_block(const word32 in[2], word32 out[2]) const;
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static const word32 p_init[ROUNDS+2];
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static const word32 s_init[4*256];
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FixedSizeSecBlock<word32, ROUNDS+2> pbox;
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FixedSizeSecBlock<word32, 4*256> sbox;
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};
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public:
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typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;
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typedef BlockCipherFinal<DECRYPTION, Base> Decryption;
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};
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typedef Blowfish::Encryption BlowfishEncryption;
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typedef Blowfish::Decryption BlowfishDecryption;
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NAMESPACE_END
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#endif
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