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Implementation of the Licensing System for a Software Product

, , 5 Aug 2010 CPOL
This article is devoted to the development of the key licensing system for the applications.
bin.zip
bin
ClientTest.exe
DigitalSignature.exe
src.zip
src
src
ClientTest
keys
public.bin
cryptopp560
adhoc.cpp.copied
adhoc.cpp.proto
cryptdll.dsp
cryptest.dsp
cryptest.dsw
cryptest_bds.bdsgroup
cryptest_bds.bdsproj
cryptest_bds.bpf
cryptlib.dsp
cryptlib_bds.bdsproj
dlltest.dsp
Doxyfile
GNUmakefile
DigitalSignature
keys
private.bin
public.bin
Utils
#ifndef CRYPTOPP_ZLIB_H
#define CRYPTOPP_ZLIB_H

#include "adler32.h"
#include "zdeflate.h"
#include "zinflate.h"

NAMESPACE_BEGIN(CryptoPP)

/// ZLIB Compressor (RFC 1950)
class ZlibCompressor : public Deflator
{
public:
	ZlibCompressor(BufferedTransformation *attachment=NULL, unsigned int deflateLevel=DEFAULT_DEFLATE_LEVEL, unsigned int log2WindowSize=DEFAULT_LOG2_WINDOW_SIZE, bool detectUncompressible=true)
		: Deflator(attachment, deflateLevel, log2WindowSize, detectUncompressible) {}
	ZlibCompressor(const NameValuePairs &parameters, BufferedTransformation *attachment=NULL)
		: Deflator(parameters, attachment) {}

	unsigned int GetCompressionLevel() const;

protected:
	void WritePrestreamHeader();
	void ProcessUncompressedData(const byte *string, size_t length);
	void WritePoststreamTail();

	Adler32 m_adler32;
};

/// ZLIB Decompressor (RFC 1950)
class ZlibDecompressor : public Inflator
{
public:
	typedef Inflator::Err Err;
	class HeaderErr : public Err {public: HeaderErr() : Err(INVALID_DATA_FORMAT, "ZlibDecompressor: header decoding error") {}};
	class Adler32Err : public Err {public: Adler32Err() : Err(DATA_INTEGRITY_CHECK_FAILED, "ZlibDecompressor: ADLER32 check error") {}};
	class UnsupportedAlgorithm : public Err {public: UnsupportedAlgorithm() : Err(INVALID_DATA_FORMAT, "ZlibDecompressor: unsupported algorithm") {}};
	class UnsupportedPresetDictionary : public Err {public: UnsupportedPresetDictionary() : Err(INVALID_DATA_FORMAT, "ZlibDecompressor: unsupported preset dictionary") {}};

	/*! \param repeat decompress multiple compressed streams in series
		\param autoSignalPropagation 0 to turn off MessageEnd signal
	*/
	ZlibDecompressor(BufferedTransformation *attachment = NULL, bool repeat = false, int autoSignalPropagation = -1);
	unsigned int GetLog2WindowSize() const {return m_log2WindowSize;}

private:
	unsigned int MaxPrestreamHeaderSize() const {return 2;}
	void ProcessPrestreamHeader();
	void ProcessDecompressedData(const byte *string, size_t length);
	unsigned int MaxPoststreamTailSize() const {return 4;}
	void ProcessPoststreamTail();

	unsigned int m_log2WindowSize;
	Adler32 m_adler32;
};

NAMESPACE_END

#endif

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Authors

Apriorit Inc
Apriorit Inc.
Ukraine Ukraine
ApriorIT is a Software Research and Development company that works in advanced knowledge-intensive scopes.
 
Company offers integrated research&development services for the software projects in such directions as Corporate Security, Remote Control, Mobile Development, Embedded Systems, Virtualization, Drivers and others.
 
Official site http://www.apriorit.com
Group type: Organisation

31 members

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Sergii Bratus
Software Developer Apriorit Inc.
Ukraine Ukraine
No Biography provided

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