QCA::KeyLength Class Reference
[QCA user API]

Simple container for acceptable key lengths. More...

#include <QtCrypto>

Collaboration diagram for QCA::KeyLength:

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List of all members.

Public Member Functions

 KeyLength (int min, int max, int multiple)
int maximum () const
int minimum () const
int multiple () const


Detailed Description

Simple container for acceptable key lengths.

The KeyLength specifies the minimum and maximum byte sizes allowed for a key, as well as a "multiple" which the key size must evenly divide into.

As an example, if the key can be 4, 8 or 12 bytes, you can express this as

KeyLength keyLen( 4, 12, 4 );

If you want to express a KeyLength that takes any number of bytes (including zero), you may want to use

#include<limits>
KeyLength( 0, std::numeric_limits<int>::max(), 1 );
Examples:

aes-cmac.cpp.


Constructor & Destructor Documentation

QCA::KeyLength::KeyLength ( int  min,
int  max,
int  multiple 
) [inline]

Construct a KeyLength object.

Parameters:
min the minimum length of the key, in bytes
max the maximum length of the key, in bytes
multiple the number of bytes that the key must be a multiple of.


Member Function Documentation

int QCA::KeyLength::maximum (  )  const [inline]

Obtain the maximum length for the key, in bytes.

int QCA::KeyLength::minimum (  )  const [inline]

Obtain the minimum length for the key, in bytes.

int QCA::KeyLength::multiple (  )  const [inline]

Return the number of bytes that the key must be a multiple of.

If this is one, then anything between minimum and maximum (inclusive) is acceptable.


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

Generated on Wed Apr 29 15:16:03 2009 for Qt Cryptographic Architecture by  doxygen 1.5.5