Qt Cryptographic Architecture
Public Member Functions | List of all members
QCA::KeyLength Class Reference

#include <QtCrypto>

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
minthe minimum length of the key, in bytes
maxthe maximum length of the key, in bytes
multiplethe number of bytes that the key must be a multiple of.

Member Function Documentation

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

Obtain the minimum length for the key, in bytes.

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

Obtain the maximum 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: