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87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
#ifndef CRYPTOPP_BASECODE_H
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#define CRYPTOPP_BASECODE_H
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#include "filters.h"
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#include "algparam.h"
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#include "argnames.h"
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NAMESPACE_BEGIN(CryptoPP)
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//! base n encoder, where n is a power of 2
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class CRYPTOPP_DLL BaseN_Encoder : public Unflushable<Filter>
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{
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public:
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BaseN_Encoder(BufferedTransformation *attachment=NULL)
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{Detach(attachment);}
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BaseN_Encoder(const byte *alphabet, int log2base, BufferedTransformation *attachment=NULL, int padding=-1)
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{
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Detach(attachment);
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IsolatedInitialize(MakeParameters(Name::EncodingLookupArray(), alphabet)
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(Name::Log2Base(), log2base)
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(Name::Pad(), padding != -1)
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(Name::PaddingByte(), byte(padding)));
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}
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void IsolatedInitialize(const NameValuePairs ¶meters);
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size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
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private:
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const byte *m_alphabet;
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int m_padding, m_bitsPerChar, m_outputBlockSize;
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int m_bytePos, m_bitPos;
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SecByteBlock m_outBuf;
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};
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//! base n decoder, where n is a power of 2
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class CRYPTOPP_DLL BaseN_Decoder : public Unflushable<Filter>
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{
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public:
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BaseN_Decoder(BufferedTransformation *attachment=NULL)
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{Detach(attachment);}
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BaseN_Decoder(const int *lookup, int log2base, BufferedTransformation *attachment=NULL)
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{
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Detach(attachment);
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IsolatedInitialize(MakeParameters(Name::DecodingLookupArray(), lookup)(Name::Log2Base(), log2base));
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}
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void IsolatedInitialize(const NameValuePairs ¶meters);
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size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
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static void CRYPTOPP_API InitializeDecodingLookupArray(int *lookup, const byte *alphabet, unsigned int base, bool caseInsensitive);
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private:
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const int *m_lookup;
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int m_padding, m_bitsPerChar, m_outputBlockSize;
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int m_bytePos, m_bitPos;
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SecByteBlock m_outBuf;
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};
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//! filter that breaks input stream into groups of fixed size
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class CRYPTOPP_DLL Grouper : public Bufferless<Filter>
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{
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public:
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Grouper(BufferedTransformation *attachment=NULL)
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{Detach(attachment);}
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Grouper(int groupSize, const std::string &separator, const std::string &terminator, BufferedTransformation *attachment=NULL)
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{
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Detach(attachment);
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IsolatedInitialize(MakeParameters(Name::GroupSize(), groupSize)
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(Name::Separator(), ConstByteArrayParameter(separator))
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(Name::Terminator(), ConstByteArrayParameter(terminator)));
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}
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void IsolatedInitialize(const NameValuePairs ¶meters);
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size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
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private:
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SecByteBlock m_separator, m_terminator;
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size_t m_groupSize, m_counter;
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};
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NAMESPACE_END
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#endif
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