74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
#ifndef CRYPTOPP_RC2_H
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#define CRYPTOPP_RC2_H
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/** \file
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*/
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#include "seckey.h"
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#include "secblock.h"
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#include "algparam.h"
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NAMESPACE_BEGIN(CryptoPP)
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//! _
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struct RC2_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 1, 128>
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{
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CRYPTOPP_CONSTANT(DEFAULT_EFFECTIVE_KEYLENGTH = 1024)
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CRYPTOPP_CONSTANT(MAX_EFFECTIVE_KEYLENGTH = 1024)
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static const char *StaticAlgorithmName() {return "RC2";}
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};
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/// <a href="http://www.weidai.com/scan-mirror/cs.html#RC2">RC2</a>
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class RC2 : public RC2_Info, public BlockCipherDocumentation
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{
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class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<RC2_Info>
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{
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public:
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void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms);
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unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word16>();}
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protected:
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FixedSizeSecBlock<word16, 64> K; // expanded key table
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};
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class CRYPTOPP_NO_VTABLE Enc : public Base
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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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};
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class CRYPTOPP_NO_VTABLE Dec : public Base
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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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};
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public:
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class Encryption : public BlockCipherFinal<ENCRYPTION, Enc>
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{
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public:
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Encryption() {}
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Encryption(const byte *key, size_t keyLen=DEFAULT_KEYLENGTH)
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{SetKey(key, keyLen);}
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Encryption(const byte *key, size_t keyLen, int effectiveKeyLen)
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{SetKey(key, keyLen, MakeParameters("EffectiveKeyLength", effectiveKeyLen));}
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};
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class Decryption : public BlockCipherFinal<DECRYPTION, Dec>
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{
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public:
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Decryption() {}
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Decryption(const byte *key, size_t keyLen=DEFAULT_KEYLENGTH)
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{SetKey(key, keyLen);}
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Decryption(const byte *key, size_t keyLen, int effectiveKeyLen)
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{SetKey(key, keyLen, MakeParameters("EffectiveKeyLength", effectiveKeyLen));}
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};
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};
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typedef RC2::Encryption RC2Encryption;
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typedef RC2::Decryption RC2Decryption;
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NAMESPACE_END
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#endif
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