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# KMD4 Class Reference

An adapted C++ implementation of the MD4 Message-Digest algorithm.

Since:
  3.4.

More...

`#include <kmdcodec.h>`

List of all members.

## Public Types

typedef unsigned char | Digest [16]

## Public Member Functions

| KMD4 (const char *in, int len=-1)
| KMD4 (const QByteArray &a)
| KMD4 (const QCString &a)
void | update (const char *in, int len=-1)
void | update (const unsigned char *in, int len=-1)
void | update (const QByteArray &in)
void | update (const QCString &in)
bool | update (QIODevice &file)
void | reset ()
const Digest & | rawDigest ()
void | rawDigest (KMD4::Digest &bin)
QCString | hexDigest ()
void | hexDigest (QCString &)
QCString | base64Digest ()
bool | verify (const KMD4::Digest &digest)
bool | verify (const QCString &)

## Protected Member Functions

void | transform (Q_UINT32 buf[4], Q_UINT32 const in[16])
void | finalize ()

## Detailed Description

An adapted C++ implementation of the MD4 Message-Digest algorithm.

Since:
  3.4.

The class usage is the same as KMD5.

Definition at line 577 of file kmdcodec.h.

## Constructor & Destructor Documentation

KMD4::KMD4 | ( | const char * | in,
|  | int | len = `-1`
| ) |

Constructor that updates the digest for the given string.

Parameters:

  | in | C string or binary data
  | len | if negative, calculates the length by using strlen on the first parameter, otherwise it trusts the given length (does not stop on NUL byte).

Definition at line 1145 of file kmdcodec.cpp.

References update().

KMD4::KMD4 | ( | const QByteArray & | a | ) |

| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Same as above except it accepts a QByteArray as its argument. Definition at line 1151 of file kmdcodec.cpp. References update().

KMD4::KMD4 | ( | const QCString & | a | ) |

| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Same as above except it accepts a QCString as its argument. Definition at line 1157 of file kmdcodec.cpp. References update().

## Member Function Documentation

void KMD4::update | ( | const char * | in,
|  | int | len = `-1`
| ) | `[inline]`

Updates the message to be digested.

Be sure to add all data before you read the digest. After reading the digest, you can not add more data!

Parameters:

  | in | message to be added to digest
  | len | the length of the given message.

Definition at line 617 of file kmdcodec.h.

Referenced by KMD4(), and update().

void KMD4::update | ( | const unsigned char * | in,
|  | int | len = `-1`
| ) |

| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Definition at line 1177 of file kmdcodec.cpp. References endl(), and transform().

void KMD4::update | ( | const QByteArray & | in | ) |

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters:

  | in | message to be added to the digest (QByteArray).

Definition at line 1163 of file kmdcodec.cpp.

References update().

void KMD4::update | ( | const QCString & | in | ) |

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters:

  | in | message to be added to the digest (QCString).

Definition at line 1168 of file kmdcodec.cpp.

References update().

bool KMD4::update | ( | QIODevice & | file | ) |

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

reads the data from an I/O device, i.e. from a file (QFile).

NOTE that the file must be open for reading.

Parameters:

  | file | a pointer to FILE as returned by calls like f{d,re}open

Returns:
  false if an error occurred during reading.

Definition at line 1235 of file kmdcodec.cpp.

References update().

void KMD4::reset | ( |  | ) |

| Calling this function will reset the calculated message digest. Use this method to perform another message digest calculation without recreating the KMD4 object. Definition at line 1364 of file kmdcodec.cpp.

const KMD4::Digest & KMD4::rawDigest | ( |  | ) |

Returns:
  the raw representation of the digest

Definition at line 1309 of file kmdcodec.cpp.

References finalize().

Referenced by verify().

void KMD4::rawDigest | ( | KMD4::Digest & | bin | ) |

Fills the given array with the binary representation of the message digest.

Use this method if you do not want to worry about making copy of the digest once you obtain it.

Parameters:

  | bin | an array of 16 characters ( char[16] )

Definition at line 1315 of file kmdcodec.cpp.

References finalize().

QCString KMD4::hexDigest | ( |  | ) |

| Returns the value of the calculated message digest in a hexadecimal representation. Definition at line 1321 of file kmdcodec.cpp. References finalize(). Referenced by verify().

void KMD4::hexDigest | ( | QCString & |  | ) |

| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Definition at line 1334 of file kmdcodec.cpp. References finalize(), and QCString::resize().

QCString KMD4::base64Digest | ( |  | ) |

| Returns the value of the calculated message digest in a base64-encoded representation. Definition at line 1344 of file kmdcodec.cpp. References KCodecs::base64Encode(), and finalize().

bool KMD4::verify | ( | const KMD4::Digest & | digest | ) |

| returns true if the calculated digest for the given message matches the given one. Definition at line 1297 of file kmdcodec.cpp. References finalize(), and rawDigest().

bool KMD4::verify | ( | const QCString & |  | ) |

| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Definition at line 1303 of file kmdcodec.cpp. References finalize(), and hexDigest().

void KMD4::transform | ( | Q_UINT32 | buf[4],
|  | Q_UINT32 const | in[16]
| ) | `[protected]`

| Performs the real update work. Note that length is implied to be 64. Definition at line 1439 of file kmdcodec.cpp. Referenced by finalize(), and update().

void KMD4::finalize | ( |  | ) | `[protected]`

| finalizes the digest Definition at line 1250 of file kmdcodec.cpp. References transform(). Referenced by base64Digest(), hexDigest(), rawDigest(), and verify().

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

- kmdcodec.h
- kmdcodec.cpp

This file is part of the documentation for kdecore Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Sat Jun 11 20:18:47 2005 by doxygen 1.4.1 written by Dimitri van Heesch, © 1997-2003