/usr/include/cc++/digest.h is in libcommoncpp2-dev 1.8.1-6.1.
This file is owned by root:root, with mode 0o644.
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// Copyright (C) 2006-2010 David Sugar, Tycho Softworks.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
//
// This exception applies only to the code released under the name GNU
// Common C++. If you copy code from other releases into a copy of GNU
// Common C++, as the General Public License permits, the exception does
// not apply to the code that you add in this way. To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
//
// If you write modifications of your own for GNU Common C++, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.
//
/**
* @file digest.h
* @short Digest algorithms: checksum, CRC and MD5.
**/
#ifndef CCXX_DIGEST_H_
#define CCXX_DIGEST_H_
#ifndef CCXX_MISSING_H_
#include <cc++/missing.h>
#endif
#ifndef CCXX_THREAD_H_
#include <cc++/thread.h>
#endif
#ifndef CCXX_EXCEPTION_H_
#include <cc++/exception.h>
#endif
#ifdef CCXX_NAMESPACES
namespace ost {
#endif
/**
* The digest base class is used for implementing and deriving one way
* hashing functions.
*
* @author David Sugar <dyfet@ostel.com>
* @short base class for hashing services.
*/
class __EXPORT Digest : protected std::streambuf, public std::ostream
{
protected:
Digest();
/**
* Get the size of a digest in octets.
*
* @return number of bytes in digest.
*/
virtual unsigned getSize(void) = 0;
/**
* Copy the binary digest buffer to user memory.
*
* @return number of bytes in digest.
* @param buffer to write into.
*/
virtual unsigned getDigest(unsigned char *buffer) = 0;
/**
* Put data into the digest bypassing the stream subsystem.
*
* @param buffer to read from.
* @param length of data.
*/
virtual void putDigest(const unsigned char *buffer, unsigned length) = 0;
/**
* print a digest string for export.
*
* @return string representation of digest.
*/
virtual std::ostream &strDigest(std::ostream &os) = 0;
friend std::ostream &operator<<(std::ostream &os, Digest &ia)
{return ia.strDigest(os);};
public:
/**
* Reset the digest table to an initial default value.
*/
virtual void initDigest(void) = 0;
virtual ~Digest();
};
/**
* A simple checksum digest function.
*
* @author David Sugar <dyfet@ostel.com>
* @short checksum hash function.
*/
class __EXPORT ChecksumDigest : public Digest
{
private:
unsigned char csum;
protected:
int overflow(int c);
std::ostream &strDigest(std::ostream &os);
public:
ChecksumDigest();
void initDigest(void)
{csum = 0;};
unsigned getSize(void)
{return 1;};
unsigned getDigest(unsigned char *buffer);
void putDigest(const unsigned char *buffer, unsigned length);
};
/**
* A crc16 collection/compution hash accumulator class.
*
* @author David Sugar <dyfet@ostel.com>
* @short crc16 computation hash.
*/
class __EXPORT CRC16Digest : public Digest
{
private:
uint16 crc16;
protected:
int overflow(int c);
std::ostream &strDigest(std::ostream &os);
public:
CRC16Digest();
CRC16Digest ( const CRC16Digest &crc );
virtual ~CRC16Digest() {};
inline void initDigest(uint16 crc) {crc16 = crc;};
void initDigest(void) {initDigest(0);};
inline unsigned getSize ( void )
{return sizeof(crc16);};
CRC16Digest& operator= ( const CRC16Digest &right );
operator const uint16() const
{return crc16;};
inline uint16 getDigest(void)
{return crc16;};
unsigned getDigest ( unsigned char *buffer );
void putDigest ( const unsigned char *buffer, unsigned length );
};
/**
* A crc32 collection/computation hash accumulator class.
*
* @author Kevin Kraatz <kraatz@arlut.utexas.edu>
* @short crc32 computation hash.
*/
class __EXPORT CRC32Digest : public Digest
{
private:
uint32 crc_table[256];
uint32 crc_reg;
uint32 crc32;
protected:
unsigned char overflow(unsigned char octet);
std::ostream &strDigest(std::ostream &os);
public:
CRC32Digest();
CRC32Digest(const CRC32Digest &crc);
void initDigest(void);
inline unsigned getSize(void) {return sizeof(crc32);}
operator const uint32() const
{return crc32;};
inline uint32 getDigest(void)
{return crc32;};
unsigned getDigest(unsigned char *buffer);
void putDigest(const unsigned char *buffer, unsigned length);
CRC32Digest& operator= (const CRC32Digest &right);
};
/**
* A md5 collection/computation accululator class.
*
* @author David Sugar <dyfet@ostel.com>
* @short md5 hash accumulation.
*/
class __EXPORT MD5Digest : public Digest
{
private:
unsigned long state[4];
unsigned long count[2];
unsigned char buf[64];
unsigned bpos;
unsigned char md5[16];
bool updated;
protected:
int overflow(int c);
void update(void);
void commit(void);
std::ostream &strDigest(std::ostream &os);
public:
MD5Digest();
void initDigest(void);
inline unsigned getSize(void)
{return 16;};
unsigned getDigest(unsigned char *buffer);
void putDigest(const unsigned char *buffer, unsigned len);
};
#ifdef COMMON_STD_EXCEPTION
/**
* DigestException
*
* Exception classes that pertain to errors when making or otherwise
* working with digests.
*
* @author Elizabeth Barham <lizzy@soggytrousers.net>
* @short Exceptions involving digests.
*/
class __EXPORT DigestException : public Exception {
public:
DigestException(const String &str) : Exception(str) {};
};
#endif
#ifdef CCXX_NAMESPACES
}
#endif
#endif
/** EMACS **
* Local variables:
* mode: c++
* c-basic-offset: 4
* End:
*/
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