/*
?Copyright?（C）?2006?Brad?Hards?

?Permission?is?hereby?granted?free?of?charge?to?any?person?obtaining?a?copy
?of?this?software?and?associated?documentation?files?（the?“Software“）?to?deal
?in?the?Software?without?restriction?including?without?limitation?the?rights
?to?use?copy?modify?merge?publish?distribute?sublicense?and/or?sell
?copies?of?the?Software?and?to?permit?persons?to?whom?the?Software?is
?furnished?to?do?so?subject?to?the?following?conditions:

?The?above?copyright?notice?and?this?permission?notice?shall?be?included?in
?all?copies?or?substantial?portions?of?the?Software.

?THE?SOFTWARE?IS?PROVIDED?“AS?IS“?WITHOUT?WARRANTY?OF?ANY?KIND?EXPRESS?OR
?IMPLIED?INCLUDING?BUT?NOT?LIMITED?TO?THE?WARRANTIES?OF?MERCHANTABILITY
?FITNESS?FOR?A?PARTICULAR?PURPOSE?AND?NONINFRINGEMENT.??IN?NO?EVENT?SHALL?THE
?AUTHORS?BE?LIABLE?FOR?ANY?CLAIM?DAMAGES?OR?OTHER?LIABILITY?WHETHER?IN
?AN?ACTION?OF?CONTRACT?TORT?OR?OTHERWISE?ARISING?FROM?OUT?OF?OR?IN
?CONNECTION?WITH?THE?SOFTWARE?OR?THE?USE?OR?OTHER?DEALINGS?IN?THE?SOFTWARE.
*/

//?QtCrypto?has?the?declarations?for?all?of?QCA
#include?

#include?
#include?

#ifdef?QT_STATICPLUGIN
#include?“import_plugins.h“
#endif

class?AESCMACContext?:?public?QCA::MACContext
{
public:
????AESCMACContext（QCA::Provider?*p）?:?QCA::MACContext（p?“cmac（aes）“）
????{
????}

????~AESCMACContext（）
????{
????}


????//?Helper?to?left?shift?an?arbitrary?length?array
????//?This?is?heavily?based?on?the?example?in?the?I-D.
????QCA::SecureArray?leftShift（const?QCA::SecureArray?&array）
????{
	//?We?create?an?output?of?the?same?size?as?the?input
	QCA::SecureArray?out（array.size（））;
	//?We?handle?one?byte?at?a?time?-?this?is?the?high?bit
	//?from?the?previous?byte.
	int?overflow?=?0;

	//?work?through?each?byte.
	for?（int?i?=?array.size（）?-1;?i?>=?0;?--i）?{
	????//?do?the?left?shift?on?this?byte.
	????out[i]?=?array[i]?<	????//?make?the?low?bit?on?this?byte?be?the?high?bit
	????//?from?the?previous?byte.
	????out[i]?|=?overflow;
	????//?save?the?high?bit?for?next?time
	????overflow?=?（array[i]?&?0x80）???1?:?0;
	}
	return?out;
????}


????//?Helper?to?XOR?two?arrays?-?must?be?same?length
????QCA::SecureArray?xorArray（const?QCA::SecureArray?&array1
			??const?QCA::SecureArray?&array2）
????{
	if?（array1.size（）?!=?array2.size（））
	????//?empty?array
	????return?QCA::SecureArray（）;

	QCA::SecureArray?result（array1.size（））;

	for?（int?i?=?0;?i?	????result[i]?=?array1[i]?^?array2[i];

	return?result;
????}


????void?setup（const?QCA::SymmetricKey?&key）
????{
	//?We?might?not?have?a?real?key?since?this?can?get?called
	//?from?the?constructor.
	if?（key.size（）?==?0）
	????return;

	m_key?=?key;
	//?Generate?the?subkeys
	QCA::SecureArray?const_Zero（16）;
	QCA::SecureArray?const_Rb（16）;
	const_Rb[15]?=?（char）0x87;

	m_X?=?const_Zero;
	m_residual?=?QCA::SecureArray（）;

	//?Figure?2.2?step?1.
	QCA::Cipher?aesObj（QString（“aes128“）
			???QCA::Ciphe