MD5 Class Reference

Computes the MD5 checksum from a byte stream. More...

#include <md5.hpp>

Inheritance diagram for MD5:

[legend]Collaboration diagram for MD5:

[legend]List of all members.

Public Member Functions
wxString	getValue (const bool hexInUpperCase=false) const
	Returns the MD5 checksum value in a string.
void *	getValue (void *buffer) const
	Returns the MD5 checksum value in the first 16 bytes of the given adress.
	MD5 ()
	Default constructor.
void	reset ()
	Resets the MD5 checksum to initial state of computation.
void	update (const wxByte *buf, unsigned int len)
	Updates the MD5 checksum with specified array of bytes.
Protected Member Functions
void	finish ()
	Process the remaining bytes in the internal buffer and the usual prolog according to the standard.
void	process_block (const void *buf, size_t len)
	Process len bytes of buf, accumulating context in this.
Protected Attributes
wxUint32	A_
	First part of the state of computation.
wxUint32	B_
	Second part of the state of computation.
wxUint32	buflen
	Current size of the input buffer.
wxUint32	C_
	Third part of the state of computation.
wxUint32	D_
	Fourth part of the state of computation.
wxByte	ibuffer [128]
	Input buffer.
wxUint32	total [2]
	Number of bits mod 2^64.
Static Protected Attributes
const wxByte	fillbuf [64]
	The bytes used to pad the buffer to the next 64-byte boundary (RFC 1321, 3.1: Step 1).

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Detailed Description

Computes the MD5 checksum from a byte stream.

This class is a rewrite in C++ of the md5 checksum computing algorithm present in the GNU coreutils. Please see the GNU projet website for more informations.

Using this class in very simple:<BR> Use the update method to provide to the class the bytes for computing the checksum.

The MD5 checksum value can be gotten by two ways:

• The getValue method which puts the MD5 checksum value in an array of 16 bytes.
• The getValue method which returns the MD5 checksum value in a string.

The MD5 checksum computing can be reseted by the reset method.

Definition at line 63 of file md5.hpp.

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Constructor & Destructor Documentation

MD5::MD5 (   )

Default constructor. Definition at line 61 of file md5.cpp. References reset().

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Member Function Documentation

void MD5::finish (   )  [protected]

Process the remaining bytes in the internal buffer and the usual prolog according to the standard. Definition at line 89 of file md5.cpp. References buflen, fillbuf, ibuffer, process_block(), and total. Referenced by getValue().

wxString MD5::getValue (  const bool  hexInUpperCase = false  )  const [virtual]

Returns the MD5 checksum value in a string. Parameters: hexInUpperCase  If true the hexadecimal letters will be in uppercase. Returns: The current checksum value. Implements Checksum. Definition at line 377 of file md5.cpp. References getValue().

void * MD5::getValue (  void *  buffer  )  const

Returns the MD5 checksum value in the first 16 bytes of the given adress. Parameters: buffer  The buffer where the MD5 checksum value will be stored. Returns: The adress of the buffer. Remarks: On some systems it is required that buffer is correctly aligned for a 32 bits value. The memory for the 16 bytes must have been allocated before calling this method. Definition at line 359 of file md5.cpp. References A_, B_, C_, D_, finish(), and getValue(). Referenced by getValue().

void MD5::process_block (  const void *  buf, size_t  len )  [protected]

Process len bytes of buf, accumulating context in this. It is assumed that len 64 == 0. Parameters: buf  The buffer to process. len  The number of bytes to process. Definition at line 205 of file md5.cpp. References A_, B_, C_, D_, FG, FH, FI, process_block(), and total. Referenced by finish(), process_block(), and update().

void MD5::reset (   )  [virtual]

Resets the MD5 checksum to initial state of computation. Implements Checksum. Definition at line 71 of file md5.cpp. References A_, B_, buflen, C_, D_, and total. Referenced by MD5().

void MD5::update (  const wxByte *  buf, unsigned int  len )  [virtual]

Updates the MD5 checksum with specified array of bytes. Parameters: buf  The byte array to update the MD5 checksum with. len  The number of bytes to use for the update. Implements Checksum. Definition at line 116 of file md5.cpp. References buflen, ibuffer, process_block(), and update(). Referenced by update().

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Member Data Documentation

wxUint32 MD5::A_ [protected]

First part of the state of computation. Definition at line 73 of file md5.hpp. Referenced by getValue(), process_block(), and reset().

wxUint32 MD5::B_ [protected]

Second part of the state of computation. Definition at line 74 of file md5.hpp. Referenced by getValue(), process_block(), and reset().

wxUint32 MD5::buflen [protected]

Current size of the input buffer. Definition at line 79 of file md5.hpp. Referenced by finish(), reset(), and update().

wxUint32 MD5::C_ [protected]

Third part of the state of computation. Definition at line 75 of file md5.hpp. Referenced by getValue(), process_block(), and reset().

wxUint32 MD5::D_ [protected]

Fourth part of the state of computation. Definition at line 76 of file md5.hpp. Referenced by getValue(), process_block(), and reset().

const wxByte MD5::fillbuf [static, protected]

Initial value: { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } The bytes used to pad the buffer to the next 64-byte boundary (RFC 1321, 3.1: Step 1). Definition at line 51 of file md5.cpp. Referenced by finish().

wxByte MD5::ibuffer[128] [protected]

Input buffer. Definition at line 80 of file md5.hpp. Referenced by finish(), and update().

wxUint32 MD5::total[2] [protected]

Number of bits mod 2^64. Definition at line 78 of file md5.hpp. Referenced by finish(), process_block(), and reset().

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The documentation for this class was generated from the following files:

• md5.hpp
• md5.cpp

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