/usr/include/crypto++/gzip.h is in libcrypto++-dev 5.6.1-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | #ifndef CRYPTOPP_GZIP_H
#define CRYPTOPP_GZIP_H
#include "zdeflate.h"
#include "zinflate.h"
#include "crc.h"
NAMESPACE_BEGIN(CryptoPP)
/// GZIP Compression (RFC 1952)
class Gzip : public Deflator
{
public:
Gzip(BufferedTransformation *attachment=NULL, unsigned int deflateLevel=DEFAULT_DEFLATE_LEVEL, unsigned int log2WindowSize=DEFAULT_LOG2_WINDOW_SIZE, bool detectUncompressible=true)
: Deflator(attachment, deflateLevel, log2WindowSize, detectUncompressible) {}
Gzip(const NameValuePairs ¶meters, BufferedTransformation *attachment=NULL)
: Deflator(parameters, attachment) {}
protected:
enum {MAGIC1=0x1f, MAGIC2=0x8b, // flags for the header
DEFLATED=8, FAST=4, SLOW=2};
void WritePrestreamHeader();
void ProcessUncompressedData(const byte *string, size_t length);
void WritePoststreamTail();
word32 m_totalLen;
CRC32 m_crc;
};
/// GZIP Decompression (RFC 1952)
class Gunzip : public Inflator
{
public:
typedef Inflator::Err Err;
class HeaderErr : public Err {public: HeaderErr() : Err(INVALID_DATA_FORMAT, "Gunzip: header decoding error") {}};
class TailErr : public Err {public: TailErr() : Err(INVALID_DATA_FORMAT, "Gunzip: tail too short") {}};
class CrcErr : public Err {public: CrcErr() : Err(DATA_INTEGRITY_CHECK_FAILED, "Gunzip: CRC check error") {}};
class LengthErr : public Err {public: LengthErr() : Err(DATA_INTEGRITY_CHECK_FAILED, "Gunzip: length check error") {}};
/*! \param repeat decompress multiple compressed streams in series
\param autoSignalPropagation 0 to turn off MessageEnd signal
*/
Gunzip(BufferedTransformation *attachment = NULL, bool repeat = false, int autoSignalPropagation = -1);
protected:
enum {MAGIC1=0x1f, MAGIC2=0x8b, // flags for the header
DEFLATED=8};
enum FLAG_MASKS {
CONTINUED=2, EXTRA_FIELDS=4, FILENAME=8, COMMENTS=16, ENCRYPTED=32};
unsigned int MaxPrestreamHeaderSize() const {return 1024;}
void ProcessPrestreamHeader();
void ProcessDecompressedData(const byte *string, size_t length);
unsigned int MaxPoststreamTailSize() const {return 8;}
void ProcessPoststreamTail();
word32 m_length;
CRC32 m_crc;
};
NAMESPACE_END
#endif
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