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<?php
include "page_template.html"
?>
<div id="temp-content" style="display: none;">
<h3>AES with template</h3>
<hr>
<br>
<div class="cpp-index">
<h4><u>Index</u></h4>
<ul>
<br>
<b>Source</b>
<li><a href="#tbbc_cpp">tbbc.cpp</a></li>
<b>Headers</b>
<li><a href="#tbbc_h">tbbc.h</a></li>
<li><a href="#tbbc_hxx">tbbc.hxx</a></li>
<li><a href="#tbbcaes_128m8s_h">tbbcAES_128m8s.h</a></li>
<li><a href="#tbbcaes_128m8s_hxx">tbbcAES_128m8s.hxx</a></li>
<li><a href="#tbbcbunny_24m24k_h">tbbcBUNNY_24m24k.h</a></li>
<li><a href="#tbbcbunny_24m24k_hxx">tbbcBUNNY_24m24k.hxx</a></li>
<li><a href="#myfunctions_h">myFunctions.h</a></li>
</ul>
</div>
<br><br><hr><br>
<h4 id="tbbc_cpp">tbbc.cpp</h4>
<pre>
<code class="cpp">
/**************************/
/* Emanuele Bellini, 2012 */
/**************************/
// tbbc.cpp : main function
//
//#ifdef WIN32
// #include "stdafx.h" // works for Visual C++ 2010
//#endif
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <iomanip> // to use the function setw()
#include <bitset> // to use the Bitset class
#include <math.h>
#include <sstream> // used in ucharToString() to convert from unsigned char to string
#include "tbbc.h" //definition of the class TBBC
#include "tbbcAES_128m8s.h" //definition of the class TBBCAES
#include "tbbcBUNNY_24m24k.h" //definition of the class TBBCBUNNY
using namespace std;
//instantiation of a TBBC, first create a type, then an instance of that type
typedef TBBCAES<128,10> AES_128_10 ; // define a type AES
// which is an instance of TBBCAES
// 128 is key size
// 10 is number of rounds
typedef TBBCAES<192,12> AES_192_12 ; // define a type AES
typedef TBBCAES<256,14> AES_256_14 ; // define a type AES
typedef TBBCAES<64,5> AES_64_10 ; // define a type AES
typedef TBBCBUNNY<6,5> BUNNY_5 ; // define a type BUNNY
typedef TBBC<16,32,3,3> TBBC_16_32_3_3 ; // define a type TBBC
int main(int argc, char* argv[]) {
cout << "|---------------------------------------|\n"
<< "|---------------------------------------|\n"
<< "|------------ Welcome to... ------------|\n"
<< "|---------------------------------------|\n"
<< "|----______---__-------__------___------|\n"
<< "|---|__ __|-|| \\-----|| \\----// \\-----|\n"
<< "|------||----||_/-----||_/---||---------|\n"
<< "|------||----|| \\-----|| \\---||---------|\n"
<< "|------||----|| \\----|| \\--||---------|\n"
<< "|-----/__\\ . ||__/- . ||__/ . \\___/ . --|\n"
<< "|---------------------------------------|\n"
<< "|--- TRANSLATION-BASED BLOCK CIPHERS ---|\n"
<< "|---------------------------------------|\n"
<< "|---------------------------------------|\n\n" ;
////////////////////////////////////////////////////////////////////////////
//AES_128_10 instantiation
AES_128_10 aes_128_10 ;
AES_128_10::msgType m128 ;
AES_128_10::keyType k128 ;
AES_128_10::msgType c128 ;
cout << "----------------------------------------------------" << endl ;
cout << "AES-128\n"
<< "PARAMETERS: |m|=128 |k|=128 |n|=10" << endl ;
k128 = hexTo<bitset<128> >("2b7e151628aed2a6abf7158809cf4f3c") ;
m128 = hexTo<bitset<128> >("6bc1bee22e409f96e93d7e117393172a") ;
//k128 = hexTo<bitset<128> >("00000000000000000000000000000000") ;
cout << " k = " << bitsetToHex(k128) << endl ;
c128 = aes_128_10.encode(m128,k128) ;
cout << " m = " << bitsetToHex(m128) << endl ;
cout << "Enc(m,k) = " << bitsetToHex(c128) << endl ;
cout << "Dec(c,k) = " << bitsetToHex(aes_128_10.decode(c128,k128)) << endl ;
////////////////////////////////////////////////////////////////////////////
AES_192_12 aes_192_12 ;
AES_192_12::msgType m192 ;
AES_192_12::keyType k192 ;
AES_192_12::msgType c192 ;
cout << "----------------------------------------------------" << endl ;
cout << "AES-192\n"
<< "PARAMETERS: |m|=128 |k|=192 |n|=12" << endl ;
m128 = hexTo<bitset<128> >("6bc1bee22e409f96e93d7e117393172a") ;
k192 = hexTo<bitset<192> >("8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b") ;
//k192 = hexTo<bitset<192> >("000102030405060708090a0b0c0d0e0f1011121314151617") ;
cout << " k = " << bitsetToHex(k192) << endl ;
c128 = aes_192_12.encode(m128,k192) ;
cout << " m = " << bitsetToHex(m128) << endl ;
cout << "Enc(m,k) = " << bitsetToHex(c128) << endl ;
cout << "Dec(c,k) = " << bitsetToHex(aes_192_12.decode(c128,k192)) << endl ;
////////////////////////////////////////////////////////////////////////////
AES_256_14 aes_256_14 ;
AES_256_14::msgType m256 ;
AES_256_14::keyType k256 ;
AES_256_14::msgType c256 ;
cout << "----------------------------------------------------" << endl ;
cout << "AES-256\n"
<< "PARAMETERS: |m|=128 |k|=256 |n|=14" << endl ;
m256 = hexTo<bitset<128> >("6bc1bee22e409f96e93d7e117393172a") ;
//k256 = hexTo<bitset<256> >("0000000000000000000000000000000000000000000000000000000000000000") ;
k256 = hexTo<bitset<256> >("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4") ;
cout << " k = " << bitsetToHex(k256) << endl ;
c256 = aes_256_14.encode(m256,k256) ;
cout << " m = " << bitsetToHex(m256) << endl ;
cout << "Enc(m,k) = " << bitsetToHex(c256) << endl ;
cout << "Dec(c,k) = " << bitsetToHex(aes_256_14.decode(c256,k256)) << endl ;
////////////////////////////////////////////////////////////////////////////
//AES_64_10 instantiation
AES_64_10 aes_64_10 ; //declare a variable of the type "AES_64_10"
AES_64_10::msgType m64 ;
AES_64_10::keyType k64 ;
AES_64_10::msgType c64 ;
cout << "----------------------------------------------------" << endl ;
cout << "AES-64 (Non-standard scheme)\n"
<< "PARAMETERS: |m|=128 |k|=64 |n|=5" << endl ;
m64 = hexTo<bitset<128> >("e93d7e117393172ae93d7e117393172a") ;
k64 = hexTo<bitset<64> >("0102030405060708") ;
cout << " k = " << bitsetToHex(k64) << endl ;
c64 = aes_64_10.encode(m64,k64) ;
cout << " m = " << bitsetToHex(m128) << endl ;
cout << "Enc(m,k) = " << bitsetToHex(c64) << endl ;
cout << "Dec(c,k) = " << bitsetToHex(aes_64_10.decode(c64,k64)) << endl ;
////////////////////////////////////////////////////////////////////////////
//BUNNY_5 instantiation
BUNNY_5 bunny_5 ; // declare a variable of the type "BUNNY_5"
BUNNY_5::msgType m24 ;
BUNNY_5::keyType k24 ;
BUNNY_5::msgType c24 ;
cout << "----------------------------------------------------" << endl ;
cout << "BUNNY-24 (Non-standard scheme)\n"
<< "PARAMETERS: |m|=24 |k|=24 |n|=5" << endl ;
m24 = hexTo<bitset<24> >("e93d7e") ;
k24 = hexTo<bitset<24> >("010203") ;
cout << " k = " << bitsetToHex(k24) << endl ;
c24 = bunny_5.encode(m24,k24) ;
cout << " m = " << bitsetToHex(m24) << endl ;
cout << "Enc(m,k) = " << bitsetToHex(c24) << endl ;
cout << "Dec(c,k) = " << bitsetToHex(bunny_5.decode(c24,k24)) << endl ;
////////////////////////////////////////////////////////////////////////////
//TBBC_16_32_3_3 instantiation
TBBC_16_32_3_3 tbbc ; // declare a variable of the type "TBBC_16_32_3_3"
TBBC_16_32_3_3::msgType m ;
TBBC_16_32_3_3::keyType k ;
TBBC_16_32_3_3::msgType c ;
cout << "----------------------------------------------------" << endl ;
cout << "TBBC-16-32-3-3 (Identity cipher)\n"
<< "PARAMETERS: |m|=16 |k|=32 |sbox|=3 |n|=5" << endl ;
m = hexTo<bitset<16> >("01ab") ;
k = hexTo<bitset<32> >("0123abcd") ;
cout << " k = " << bitsetToHex(k) << endl ;
c = tbbc.encode(m,k) ;
cout << " m = " << bitsetToHex(m) << endl ;
cout << "Enc(m,k) = " << bitsetToHex(c) << endl ;
cout << "Dec(c,k) = " << bitsetToHex(tbbc.decode(c,k)) << endl ;
return 0 ;
}
</code>
</pre>
<br><br><hr><br>
<h4 id="tbbc_h">tbbc.h</h4>
<pre>
<code class="cpp">
/**************************/
/* Emanuele Bellini, 2012 */
/**************************/
#ifndef TBBC_H
#define TBBC_H
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <iomanip> // to use the function setw()
#include <bitset> // to use the bitset class
#include <vector>
#include <math.h>
#include <sstream>
#include "myFunctions.h"
#ifndef ASSERT1
#include <sstream>
#define ASSERT1(COND,MSG) \
if ( !(COND) ) { \
std::ostringstream ost ; \
ost << "\n--------------------------------------------" \
<< "\nfile: " << __FILE__ \
<< "\nline: " << __LINE__ \
<< '\n' << MSG << '\n' \
<< "\n--------------------------------------------" ; \
throw std::runtime_error(ost.str()) ; \
}
#endif
#ifndef ASSERT
#define ASSERT(COND,MSG) \
if ( !(COND) ) { \
cerr << "\n--------------------------------------------" \
<< "\nfile: " << __FILE__ \
<< "\nline: " << __LINE__ \
<< '\n' << MSG << '\n' \
<< "\n--------------------------------------------" ; \
exit(1) ; \
}
#endif
using namespace std;
//! TBBC CLASS
/*!
This class allows to instantiate a block cipher working on nb_msg bits,
with a master key of nb_key bits, whose s-boxes take input of nb_sbox bits,
and with nround rounds.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
class TBBC {
public:
/*! Is the type of a message string (eg, bitset<128>, bitset<24>, etc..) */
typedef bitset<nb_msg> msgType ;
/* ! Is the type of a key string (eg, bitset<256>, bitset<128>, etc..) */
typedef bitset<nb_key> keyType ;
/*! Is the type of a message string which is input into the sBox
(e.g., bitset<8>, bitset<6>, etc..) */
typedef bitset<nb_sbox> sboxType ;
/*! Is the type of a word string,
used in the keyschedule or in the mixing layer
(e.g., bitset<128*4>, etc..)*/
typedef bitset<nb_sbox*4> wordType ;
/*! Is the type of the vector containing the round keys */
typedef vector<msgType> roundkeyType ;
//! Contains the round keys
roundkeyType rk;
// CONSTRUCTORS
TBBC() ;
// Print functions
void printParameter() ;
// CODING FUNCTIONS
virtual msgType encode( msgType m, keyType k ) ;
virtual msgType decode( msgType m, keyType k ) ;
protected:
// ROUND FUNCTIONS
// Sbox
// virtual ... " = 0 " means declared as pure virtual,
// i.e. it will always be declared in class inheriting from this class
// EX:
// virtual sboxType sbox( unsigned nbox, sboxType x ) = 0 ;
virtual sboxType sbox( unsigned nbox, sboxType x ) ;
virtual sboxType sboxInverse( unsigned nbox, sboxType x ) ;
virtual msgType sBox (msgType m) ; // sBox based on sbox
virtual msgType sBoxInverse (msgType m) ; // sBox based on sbox
// Mixing layer
virtual msgType mixingLayer (msgType m ) ;
virtual msgType mixingLayerInverse (msgType m ) ;
//Add round key
virtual msgType addRoundKey (msgType m, msgType k) ;
// KEY SCHEDULE
virtual void keySchedule(keyType k) ;
public:
// MISC FUNCTIONS
sboxType extractBlock ( unsigned nblk, msgType x ) ;
sboxType extractKeyBlock ( unsigned nblk, keyType x ) ;
sboxType extractFromWordToSboxType ( unsigned pos, wordType x ) ;
msgType insertBlock ( msgType m, unsigned nblk, sboxType x ) ;
msgType copyIntoRoundKey ( msgType m, unsigned pos, wordType x) ;
wordType copyIntoWord ( wordType m, unsigned pos, sboxType x) ;
wordType extractWord ( unsigned pos, keyType x ) ;
} ;
#include "tbbc.hxx"
#endif
</code>
</pre>
<br><br><hr><br>
<h4 id="tbbc_hxx">tbbc.hxx</h4>
<pre>
<code class="cpp">
/**************************/
/* Emanuele Bellini, 2012 */
/**************************/
////////////////////////////////////////////////////
//////VIRTUAL//METHODS//OF//THE//BASE//CLASS////////
////////////////////////////////////////////////////
////////////////
//CONSTRUCTORS//
////////////////
/*!
Allocate the space needed to fill a vector containing all the round keys.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
TBBC<nb_msg, nb_key, nb_sbox,nround>::TBBC(){
rk.resize(nround+1) ; // allocates memory for the round keys
}
/////////////////////////////////////////////////
////////////////MISC//FUNCTIONS//////////////////
/////////////////////////////////////////////////
//!Print to the terminal the current parameters of the block cipher.
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
void
TBBC<nb_msg,nb_key,nb_sbox,nround>::printParameter() {
std::cout << "-------------------------------\n" ;
std::cout << "| TBBC's PARAMETERS are: " << setw (5) << "|\n" ;
std::cout << "| S-box size: " << setw (5) << nb_sbox << "|\n" ;
std::cout << "| Message size: " << setw (5) << nb_msg << "|\n" ;
std::cout << "| Key size: " << setw (5) << nb_key << "|\n" ;
std::cout << "| Number of Rounds:" << setw (5) << nround << "|\n" ;
std::cout << "-------------------------------\n" ;
}
/*!
Extracts nb_sbox from a msgType x, i.e. extracts the block number nblk
(block 0 is the rightmost) from x.
*/
/*!
Extracts nb_sbox bits in position [nblk*nb_sbox..nblk*nb_sbox + nb_sbox-1]
from a string of type msgType and insert them in a string of type sboxType.
Exits from program if the position pos is negative or greater
then the size of msgType minus the size of sboxType.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::sboxType
TBBC<nb_msg,nb_key,nb_sbox,nround>::extractBlock( unsigned nblk, msgType x ) {
sboxType y ;
for ( unsigned i = 0 ; i < nb_sbox ; ++i) y[i] = x[i+nblk*nb_sbox] ;
return y ;
}
/*!
Extracts nb_sbox from a keyType x, i.e. extracts the block number nblk
(block 0 is the rightmost) from x.
*/
/*!
Extracts nb_sbox bits in position [nblk*nb_sbox..nblk*nb_sbox + nb_sbox-1]
from a string of type keyType and insert them in a string of type sboxType.
Exits from program if the position pos is negative or greater
then the size of keyType minus the size of sboxType.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::sboxType
TBBC<nb_msg,nb_key,nb_sbox,nround>::extractKeyBlock( unsigned nblk, keyType x ) {
sboxType y ;
for ( unsigned i = 0 ; i < nb_sbox ; ++i) y[i] = x[i+nblk*nb_sbox] ;
return y ;
}
/*! Extracts from word of type wordType nb_sbox bits and return
them as an sboxType.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::sboxType
TBBC<nb_msg,nb_key,nb_sbox,nround>::extractFromWordToSboxType( unsigned pos, wordType x ) {
sboxType y ;
ASSERT( pos <= (x.size() - y.size()) && pos >= 0,
"Error: trying to extract from a position which is not allowed!" ) ;
// this is because x[0] refers to the rightmost bit
pos = x.size() - pos - y.size() ;
// std::copy( x.begin() + pos, x.begin() + pos + y.size(), y.begin() ) ;
for ( unsigned i = 0 ; i < y.size() ; ++i) y[i] = x[i+pos] ;
return y ;
}
/*!
Copies the bitset x in m in the block nblk of m
(to copy a string fitting the sbox size into a message).
*/
/*!
- INPUT: a message m of type msgType,
the position pos where to start the copy,
the part x of the message to be copied of type sboxType.
- OUTPUT: the new copy of m.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::msgType
TBBC<nb_msg,nb_key,nb_sbox,nround>::insertBlock( msgType m, unsigned nblk, sboxType x ) {
for (unsigned i = 0 ; i < nb_sbox ; ++i ) m[i+nblk*nb_sbox] = x[i] ;
return m;
}
//!Copies the bitset x in m at position pos (to copy a word into a key).
/*!
- INPUT: a key m of type keyType, the position pos where to start the copy,
the part x of the message to be copied of type wordType.
- OUTPUT: the new copy of m.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::msgType
TBBC<nb_msg,nb_key,nb_sbox,nround>::copyIntoRoundKey(msgType m, unsigned pos, wordType x){
// this is because x[0] refers to the rightmost bit
pos = m.size() - pos - x.size() ;
for (unsigned i = 0 ; i < x.size() ; ++i ) m[i+pos] = x[i] ;
return m;
}
//! Copies the bitset x in m at position pos (to copy a word into a message).
/*!
- INPUT: a message m of type msgType,
the position pos where to start the copy,
the part x of the message to be copied of type wordType.
- OUTPUT: the new copy of m.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::wordType
TBBC<nb_msg,nb_key,nb_sbox,nround>::copyIntoWord(wordType m, unsigned pos, sboxType x){
// this is because x[0] refers to the rightmost bit
pos = m.size() - pos - x.size() ;
for (unsigned i = 0 ; i < x.size() ; ++i ) m[i+pos] = x[i] ;
return m;
}
//! Extract a word of 32 bits from a keyType element.
/*!
- INPUT: a key x, and the position pos which indicates
where the extraction has to be made.
- OUTPUT: a string y of 32 bits.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::wordType
TBBC<nb_msg,nb_key,nb_sbox,nround>::extractWord( unsigned pos, keyType x ) {
wordType y ;
ASSERT( pos <= (x.size() - y.size()) && pos >= 0,
"Error: trying to extract from a position which is not allowed!" ) ;
// this is because x[0] refers to the rightmost bit
pos = x.size() - pos - y.size() ;
// std::copy( x.begin() + pos, x.begin() + pos + y.size(), y.begin() ) ;
for ( unsigned i = 0 ; i < y.size() ; ++i) y[i] = x[i+pos] ;
return y ;
}
//////////////////////////////////
///////ENCODING//FUNCTIONS////////
//////////////////////////////////
//!Encoding function for TBBC block cipher.
/*!
- INPUT: a message m of type msgType (a bitset of dimension N) and
a key k of type keyType (a bitset of dimension M).
- OUTPUT: an (encrypted) message c of the same type as m.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::msgType
TBBC<nb_msg,nb_key,nb_sbox,nround>::encode( msgType m, keyType k ) {
msgType c ;
c = m ;
keySchedule(k) ;
//Round 0, a-tipical
c = addRoundKey(c,rk[0]) ;
//cout << "state at round: 0 --> " << bitsetToHex(c) << endl ;
//Tipical rounds
for (unsigned i = 1 ; i <= nround ; ++i){
c = sBox(c) ;
//cout << "state after sBox: --> " << bitsetToHex(c) << endl ;
c = mixingLayer(c) ;
//cout << "state after mixL: --> " << bitsetToHex(c) << endl ;
c = addRoundKey(c,rk[i]) ;
//cout << "state at round: " << i << " --> " << bitsetToHex(c) << endl ;
}
return c ;
}
//!Decoding function for TBBC block cipher.
/*!
- INPUT: a message m of type msgType (a bitset of dimension N) and
a key k of type keyType (a bitset of dimension M).
- OUTPUT: an (decrypted) message c of the same type as m.
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::msgType
TBBC<nb_msg,nb_key,nb_sbox,nround>::decode (msgType m, keyType k) {
msgType c ;
c = m ;
keySchedule(k) ;
keySchedule(k) ;
//Tipical rounds
for (unsigned i = nround ; i > 0 ; --i){
c = addRoundKey(c,rk[i]) ;
c = mixingLayerInverse(c) ;
c = sBoxInverse(c) ;
}
//Round 0, a-tipical
c = addRoundKey(c,rk[0]) ;
return c ;
}
//////////////////////////////////////////////
///////////////KEY-SCHEDULE///////////////////
//////////////////////////////////////////////
//!Key-Schedule STEP - Bunny's style.
/*!
Empty function
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
void TBBC<nb_msg,nb_key,nb_sbox,nround>::keySchedule(keyType k) {
}
///////////////////////////////
////// TBBC Add Round Key//////
///////////////////////////////
//!Add round key STEP.
/*!
Identity function
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::msgType
TBBC<nb_msg,nb_key,nb_sbox,nround>::addRoundKey (msgType m, msgType k){
return m ;
//return m ^ k;
}
////////////////////////////////
////// TBBC Nonlinear Step//////
////////////////////////////////
//!TBBC S-box STEP.
/*!
Identity function
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::msgType
TBBC<nb_msg,nb_key,nb_sbox,nround>::sBox (msgType m){
msgType c = m ;
return c;
}
//!TBBC S-box Inverse STEP.
/*!
Identity function
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::msgType
TBBC<nb_msg,nb_key,nb_sbox,nround>::sBoxInverse (msgType m){
msgType c = m ;
return c;
}
//! S-box table
/*!
Identity function
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::sboxType
TBBC<nb_msg,nb_key,nb_sbox,nround>::sbox(unsigned nbox, sboxType x) {
return x ;
}
//! Inverse of the sbox
/*!
Identity function
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::sboxType
TBBC<nb_msg,nb_key,nb_sbox,nround>::sboxInverse(unsigned nbox, sboxType x) {
return x ;
}
////////////////////////////////
//////// TBBC Linear Step///////
////////////////////////////////
//!TBBC Mixing Layer STEP.
/*!
Identity function
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::msgType
TBBC<nb_msg,nb_key,nb_sbox,nround>::mixingLayer (msgType m){
msgType c = m ;
return c;
}
//!TBBC Mixing Layer Inverse STEP.
/*!
Identity function
*/
template <unsigned nb_msg, unsigned nb_key, unsigned nb_sbox, unsigned nround>
inline
typename TBBC<nb_msg,nb_key,nb_sbox,nround>::msgType
TBBC<nb_msg,nb_key,nb_sbox,nround>::mixingLayerInverse (msgType m){
msgType c = m ;
return c;
}
</code>
</pre>
<br><br><hr><br>
<h4 id="tbbcaes_128m8s_h">tbbcAES_128m8s.h</h4>
<pre>
<code class="cpp">
/**************************/
/* Emanuele Bellini, 2012 */
/**************************/
#include "tbbc.h"
//!TBBCAES CLASS
/*!
This class inherits the methods from TBBC class,
and specifies the virtual methods which are different from TBBC's.
TBBCAES allows to instantiate a block cipher as AES working on 128 bits,
with a master key of nb_key bits, whose s-box take input of 8 bits,
and with nround rounds.
*/
template <unsigned nb_key, unsigned nround>
class TBBCAES : public TBBC<128,nb_key,8,nround> {
public:
typedef TBBC<128,nb_key,8,nround> TBBC128_8 ;
typedef typename TBBC128_8::msgType msgType ;
typedef typename TBBC128_8::keyType keyType ;
typedef typename TBBC128_8::sboxType sboxType ;
typedef typename TBBC128_8::wordType wordType ;
typedef typename TBBC128_8::roundkeyType roundkeyType ;
private:
//! Contains the round keys
roundkeyType rk;
bitset<32> rcon[16] ; // Constant assigned to each keyschedule round
public:
// CONSTRUCTORS
TBBCAES() ;
// CODING FUNCTIONS
virtual msgType encode(msgType m, keyType k) ;
virtual msgType decode(msgType m, keyType k) ;
private:
// if private can not be tested in main!!
// SBOX
virtual msgType sBox ( msgType m ) ; // sBox based on sbox
virtual msgType sBoxInverse ( msgType m ) ; // sBox based on sbox
virtual sboxType sbox ( unsigned nbox, sboxType x ) ;
virtual sboxType sboxInverse( unsigned nbox, sboxType x ) ;
// MIXING LAYER
virtual msgType mixingLayer ( msgType m ) ;
virtual msgType mixingLayerInverse ( msgType m ) ;
msgType shiftRows ( msgType m ) const ;
msgType shiftRowsInv ( msgType m ) const ;
msgType mixColumns ( msgType m ) const ;
msgType mixColumnsInv ( msgType m ) const ;
// ADD ROUND KEY
virtual msgType addRoundKey (msgType m, msgType k) ;
// KEY SCHEDULE
virtual void keySchedule(keyType k) ;
} ;
#include "tbbcAES_128m8s.hxx"
</code>
</pre>
<br><br><hr><br>
<h4 id="tbbcaes_128m8s_hxx">tbbcAES_128m8s.hxx</h4>
<pre>
<code class="cpp">
/**************************/
/* Emanuele Bellini, 2012 */
/**************************/
////////////////////////////////////////
////////METHODS//FOR//AES//CLASS////////
////////////////////////////////////////
////////////////
//CONSTRUCTORS//
////////////////
/*!
Allocate the space needed to fill a vector containing all the round keys.
*/
template <unsigned nb_key, unsigned nround>
inline
TBBCAES<nb_key,nround>::TBBCAES(){
rk.resize(nround+1) ; // allocates memory for the round keys
rcon[0] = bitset<32> (string("10001101000000000000000000000000"));
rcon[1] = bitset<32> (string("00000001000000000000000000000000"));
rcon[2] = bitset<32> (string("00000010000000000000000000000000"));
rcon[3] = bitset<32> (string("00000100000000000000000000000000"));
rcon[4] = bitset<32> (string("00001000000000000000000000000000"));
rcon[5] = bitset<32> (string("00010000000000000000000000000000"));
rcon[6] = bitset<32> (string("00100000000000000000000000000000"));
rcon[7] = bitset<32> (string("01000000000000000000000000000000"));
rcon[8] = bitset<32> (string("10000000000000000000000000000000"));
rcon[9] = bitset<32> (string("00011011000000000000000000000000"));
rcon[10] = bitset<32> (string("00110110000000000000000000000000"));
rcon[11] = bitset<32> (string("01101100000000000000000000000000"));
}
//////////////////////////////////
///////ENCODING//FUNCTIONS////////
//////////////////////////////////
//! Encoding function designed for AES block cipher.
/*!
- INPUT: a message m of type msgType (a bitset of dimension N) and
a key k of type keyType (a bitset of dimension M).
- OUTPUT: an (encrypted) message c of the same type as m.
*/
template <unsigned nb_key, unsigned nround>
inline
typename TBBCAES<nb_key,nround>::msgType
TBBCAES<nb_key,nround>::encode( msgType m, keyType k ) {
msgType c ;
c = m ;
keySchedule(k) ; //use TBBCAES keyschedule
//Round 0, a-tipical
c = this->addRoundKey(c,rk[0]) ;
//cout << "state at round: 0 --> " << bitsetToHex(c) << endl ;
//TYPICAL rounds
for (unsigned i = 1 ; i < nround ; ++i){
//AES sBox
c = sBox(c) ;
//cout << "state after sBox: --> " << bitsetToHex(c) << endl ;
// AES mixing layer
c = shiftRows(c) ;
c = mixColumns(c) ;
//cout << "state after mixL: --> " << bitsetToHex(c) << endl ;
//AES add round key
c = this->addRoundKey(c,rk[i]) ;
//cout << "state at round: " << i << " --> " << bitsetToHex(c) << endl ;
}
//AES sBox
c = sBox(c) ;
//cout << "state after sBox: --> " << bitsetToHex(c) << endl ;
// AES mixing layer - ATYPICAL (no mixColumns)
c = shiftRows(c) ;
//cout << "state after mixL: --> " << bitsetToHex(c) << endl ;
//AES add round key
c = this->addRoundKey(c,rk[nround]) ;
//cout << "state at round: " << nround << " --> " << bitsetToHex(c) << endl ;
return c ;
}
//! Decoding function designed for AES block cipher.
/*!
- INPUT: a message m of type msgType (a bitset of dimension N) and
a key k of type keyType (a bitset of dimension M).
- OUTPUT: an (encrypted) message c of the same type as m.
*/
template <unsigned nb_key, unsigned nround>
inline
typename TBBCAES<nb_key,nround>::msgType
TBBCAES<nb_key,nround>::decode( msgType m, keyType k ) {
msgType c ;
c = m ;
keySchedule(k) ; //use TBBCAES keyschedule
//Round 0, a-tipical (no mixColumns Inverse)
c = this->addRoundKey(c,rk[nround]) ;
// AES mixing layer - ATYPICAL (no mixColumns)
c = shiftRowsInv(c) ;
//AES sBox
c = sBoxInverse(c) ;
//TYPICAL rounds
for (unsigned i = nround - 1 ; i > 0 ; --i){
//AES add round key
c = this->addRoundKey(c,rk[i]) ;
// AES mixing layer
c = mixColumnsInv(c) ;
c = shiftRowsInv(c) ;
//AES sBox
c = sBoxInverse(c) ;
}
//AES add round key
c = this->addRoundKey(c,rk[0]) ;
return c ;
}
//////////////////////////////////////////////////
///////////////AES KEY-SCHEDULE///////////////////
//////////////////////////////////////////////////
//! Key-Schedule STEP - AES style.
/*!
- INPUT: a master key k of type keyType.
- OUTPUT: return a pointer to a vector of msgType
(this elements are the round key,
which must be the same length/type as the message).
*/
template <unsigned nb_key, unsigned nround>
inline
void
TBBCAES<nb_key,nround>::keySchedule(keyType k) {
//AES128 needs 11 round keys
//AES128 needs 13 round keys
//AES128 needs 15 round keys
//nround is the number of rounds without counting the first whitening
unsigned int n, b ;
unsigned nk ; // number of 32-bit words in the cipher key (4,6,8)
unsigned nb ; // number of words in the state (4)
sboxType temp ;
unsigned icon = 1 ; // index to count the costant rcon for each round
b = (nround+1)*16 ; // 16 bytes * 11,13,15 rounds = 176,208,240
n = nb_key / 8 ; // nb_sbox=8 is the sbox size
//if ( nb_key == 128 ) n = 16 ;
//else if ( nb_key == 192 ) n = 24 ;
//else if ( nb_key == 256 ) n = 32 ;
nk = nb_key / 32 ; // 4, 6, 8
nb = 4 ;
//number of 32-bit-words generated
unsigned nword = (nround+1) * nb ;// (nround+1) * 4
//i.e.: nrow round keys at a time are filled
//unsigned ncol = nb_msg/nb_sbox ;
//unsigned nrow = nb_msg/nb_sbox + 1 ;
vector<wordType> w ; // w will contains 32 bits words
w.resize(nword) ; // initialize a vector of nword elements of type sboxType,
// set to 00...0
//CREATE w, a vector of nwords words
//put the key bits in the first 16 words
for (unsigned i = 0 ; i < nk ; ++i) {
w[i] = this->extractWord(i*8*4,k) ;
//cout << "w[" << i << "] = "<< bitsetToHex(w[i]) << endl ;
}
for (unsigned i = nk ; i < nword ; ++i){
w[i] = w[i-1] ;
if ( i % nk == 0){
//Rotate the word w[i] 8 bits to the left
w[i] = rotLeft(w[i],8) ;
//Apply the sBoxes to w[i]
for (unsigned j = 0 ; j < 4 ; ++j){
// extract nb_sbox bits starting from left to right
temp = this->extractFromWordToSboxType( j*8, w[i]) ;
// elaborate the nb_sbox bits extracted
temp = sbox(1,temp) ;
// put temp in the position j*8 of the message w[i]