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#include "../../../include/odfaeg/Network/aes.h"
namespace odfaeg {
namespace network {
const int AES_ENC::sBox[] = {
0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE,
0xD7, 0xAB, 0x76, 0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4,
0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0, 0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7,
0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15, 0x04, 0xC7, 0x23, 0xC3,
0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75, 0x09,
0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3,
0x2F, 0x84, 0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE,
0x39, 0x4A, 0x4C, 0x58, 0xCF, 0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85,
0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8, 0x51, 0xA3, 0x40, 0x8F, 0x92,
0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2, 0xCD, 0x0C,
0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19,
0x73, 0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14,
0xDE, 0x5E, 0x0B, 0xDB, 0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2,
0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79, 0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5,
0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08, 0xBA, 0x78, 0x25,
0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,
0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86,
0xC1, 0x1D, 0x9E, 0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E,
0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF, 0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42,
0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16
};
const int AES_ENC::invSBox[] = {
0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0xA3, 0x9E, 0x81,
0xF3, 0xD7, 0xFB, 0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E,
0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB, 0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23,
0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E, 0x08, 0x2E, 0xA1, 0x66,
0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25, 0x72,
0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65,
0xB6, 0x92, 0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46,
0x57, 0xA7, 0x8D, 0x9D, 0x84, 0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A,
0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06, 0xD0, 0x2C, 0x1E, 0x8F, 0xCA,
0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B, 0x3A, 0x91,
0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6,
0x73, 0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8,
0x1C, 0x75, 0xDF, 0x6E, 0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F,
0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B, 0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2,
0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4, 0x1F, 0xDD, 0xA8,
0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F,
0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93,
0xC9, 0x9C, 0xEF, 0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB,
0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6,
0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D
};
using namespace std;
unsigned char* AES_ENC::ossl_encrypt(const unsigned char* data, int dataSize, int* newSize) {
int cLen = dataSize+AES_BLOCK_SIZE;
int fLen = 0;
unsigned char *encData = new unsigned char[cLen];
if (!EVP_EncryptInit_ex(e_ctx, EVP_aes_256_cbc(), nullptr, ossl_key, iv))
return nullptr;
if (!EVP_EncryptUpdate(e_ctx, encData, &cLen, data, dataSize))
return nullptr;
if(!EVP_EncryptFinal_ex(e_ctx, encData+cLen, &fLen)) {
return nullptr;
}
*newSize = cLen + fLen;
return encData;
}
unsigned char* AES_ENC::ossl_decrypt(const unsigned char* encData, int dataSize, int* newSize) {
int pLen = dataSize;
int fLen = 0;
unsigned char *data = new unsigned char[pLen];
if (!EVP_DecryptInit_ex(d_ctx, EVP_aes_256_cbc(), nullptr, ossl_key, iv))
return nullptr;
if (!EVP_DecryptUpdate(d_ctx, data, &pLen, encData, dataSize))
return nullptr;
if (!EVP_DecryptFinal_ex(d_ctx, data+pLen, &fLen)) {
char* err = (char*) malloc(130);
ERR_load_crypto_strings();
ERR_error_string(ERR_get_error(), err);
fprintf(stderr, "Error encrypting message: %s\n", err);
free(err);
}
*newSize = pLen + fLen;
return data;
}
void AES_ENC::ossl_setKey(char* sKey) {
ossl_key = new unsigned char[size / 8];
memcpy(ossl_key, (unsigned char*) sKey, strlen(sKey));
//key[strlen(sKey) + 1] = '\0';
}
void AES_ENC::ossl_setIv(char* sIv) {
iv = new unsigned char[size / 8];
memcpy(iv, (unsigned char*) sIv, strlen(sIv));
//iv[strlen(sIv) + 1] = '\0';
}
char* AES_ENC::ossl_getKey() {
return (char*) ossl_key;
}
char* AES_ENC::ossl_getIv() {
return (char*) iv;
}
void AES_ENC::generateKey() {
BigInt k = BigInt::genRandom(64, 16);
string s = k.toStr(16);
for (unsigned int i = 0; i < nk * 4; i++) {
BigInt n (s.substr(i, 1), 16);
key[i] = core::conversionStringInt(n.toStr(10));
}
rCon[1] = AESWord128(1, 0, 0, 0);
for (int i = 2; i < 15; i++) {
rCon[i] = AESWord128(gf2Mult(2,rCon[i-1].byte1),0,0,0);
}
expandKey = keyExpansion(key);
}
/**
* Permet de chiffrer une suite de bytes
*/
unsigned char* AES_ENC::encrypt(const unsigned char* mess, size_t dataSize, size_t& newSize) {
array<array<int, 4>, 4> tmpbloc;
int i = 0, j = 0;
array<unsigned char, 4> tmpSize;
newSize = ((dataSize/16)*16)+32;
unsigned char* res = new unsigned char[newSize];
//J'ai choisi d'ajouter un bloc contenant la taille du message d'origine car
//une fois chiffrer le message est de taille multiple a 16 donc il faudra la taille d'origine
//pour dechiffrer
tmpSize = intToBytes(dataSize);
tmpbloc[0][0] = tmpSize[0] + 128;
tmpbloc[0][1] = tmpSize[1] + 128;
tmpbloc[0][2] = tmpSize[2] + 128;
tmpbloc[0][3] = tmpSize[3] + 128;
for(i =4;i<16;i++)
tmpbloc[i/4][i%4] = 0;
tmpbloc = encryptBloc(tmpbloc);
i=0;
addTab(res,tmpbloc,i);
while (i<dataSize) {
//Creation du bloc de 16bytes à chiffrer
if (i+16<=dataSize){
for (j=0; j<16;j++){
tmpbloc[j/4][j%4] = mess[i+j] + 128;
}
}else{
j=0;
for (int k=i; k<dataSize;k++){
tmpbloc[j/4][j%4] = mess[k] + 128;
j++;
}
for (int k = j; k<16;k++)
tmpbloc[j/4][j%4] = 0;
}
//Chiffrement des données
tmpbloc = encryptBloc(tmpbloc);
//Ajout des données au tableau de resultat
addTab(res,tmpbloc,i+16);
i+=16;
}
return res;
}
/**
* Permet de dechiffrer une suite de bytes
*/
unsigned char* AES_ENC::decrypt(const unsigned char* mess, size_t dataSize, size_t& newSize) {
array<unsigned char, 4> tmpSize;
int pos = 0;
array<array<int, 4>, 4> tmpbloc;
for (int i=0;i<16;i++)
tmpbloc[i/4][i%4] = mess[i] + 128;
tmpbloc = decryptBloc(tmpbloc);
tmpSize[0] = (unsigned char)(tmpbloc[0][0] - 128);
tmpSize[1] = (unsigned char)(tmpbloc[0][1] - 128);
tmpSize[2] = (unsigned char)(tmpbloc[0][2] - 128);
tmpSize[3] = (unsigned char)(tmpbloc[0][3] - 128);
for (unsigned int i = 0; i < 4; i++)
std::cout<<(int) tmpSize[i]<<std::endl;
newSize = bytesToInt(tmpSize);
std::cout<<newSize<<std::endl;
unsigned char* res = new unsigned char [newSize];
int i = 16;
while (i<dataSize){
for (int j=0;j<16;j++)
tmpbloc[j/4][j%4] = mess[i+j] + 128;
tmpbloc = decryptBloc(tmpbloc);
addTab(res,tmpbloc,pos);
pos+=16;
i += 16;
}
return res;
}
/**
* Chiffre un bloc 16 bytes rangés dans un tableau [4][4]
*/
array<array<int, 4>, 4> AES_ENC::encryptBloc(array<array<int, 4>, 4> matrix){
matrix = addRoundKey(matrix, getRoundKey(0));
//Ronde AES
for (int i=1; i<nr;i++){
matrix = subBytes(matrix);
matrix = shiftRows(matrix);
matrix = mixColumns(matrix);
matrix = addRoundKey(matrix, getRoundKey(i));
}
matrix = subBytes(matrix);
matrix = shiftRows(matrix);
matrix = addRoundKey(matrix, getRoundKey(nr));
return matrix;
}
/**
* Dechiffre un bloc
*/
array<array<int, 4>, 4> AES_ENC::decryptBloc(array<array<int, 4>, 4> matrix){
matrix = addRoundKey(matrix, getRoundKey(nr));
//Ronde AES
for (int i=nr-1; i>0; i--){
matrix = invShiftRows(matrix);
matrix = invSubBytes(matrix);
matrix = addRoundKey(matrix, getRoundKey(i));
matrix = invMixColumns(matrix);
}
matrix = invShiftRows(matrix);
matrix = invSubBytes(matrix);
matrix = addRoundKey(matrix, getRoundKey(0));
return matrix;
}
/****************************************************************************************************************
* Construction des clés de rondes
****************************************************************************************************************/
/**
* Applique un XOR sur chaque element de in par key
* @param in tableau 4x4 a traiter
* @param key cle de cryptage
* @return retourne un tableau 4x4
*/
array<array<int, 4>, 4> AES_ENC::addRoundKey(array<array<int, 4>, 4> in, array<int, 16> key)
{
array<array<int, 4>, 4> out;
int k =0, l=0;
for (int i=0;i< (4*nk);i++)
{
k = i/4 % 4;
l = i % 4;
out[k][l] = in[k][l] ^ key[i];
}
return out;
}
/**
* Procede à la generation des clés de rondes
*/
array<int, 176> AES_ENC::keyExpansion(array<int, 16> k)
{
AESWord128 tmp;
array<AESWord128, 176> w;
int t = 0, i = 0;
array<int, 176> result;
for (i=0; i< nk; i++)
{
w[i] = AESWord128(k[t],k[t+1],k[t+2],k[t+3]);
t += 4;
}
for(i=nk; i < (nb * (nr +1)); i++ )
{
tmp = AESWord128(w[i-1]);
if ((i % nk) == 0){
tmp = AESWord128((subWord(tmp.rotWord()))^(rCon[i / nk]));
}else if((nk > 6) && (i % nk ==4)){
tmp = AESWord128(subWord(tmp));
}
w[i] = AESWord128(w[i - nk]^(tmp));
}
t = 0;
i = 0;
while ( i < (nk * (nr+1)))
{
result[t] = w[i].byte1;
result[t+1] = w[i].byte2;
result[t+2] = w[i].byte3;
result[t+3] = w[i].byte4;
i++;
t+=4;
}
return result;
}
/**
* Retourne la clé de ronde de la ronde round
* @round
*/
array<int, 16> AES_ENC::getRoundKey(int round)
{
array<int, 16> out;
int t= 0;
for (int i=(round*4*nk); i < (round*4*nk)+(4*nk); i++){
out[t] = expandKey[i];
t++;
}
return out;
}
/**
* Application de la sBox a un mot AES de clé de ronde
* @param w
* @return
*/
AES_ENC::AESWord128 AES_ENC::subWord(AESWord128 w)
{
AESWord128 out (sBox[w.byte1],sBox[w.byte2],sBox[w.byte3],sBox[w.byte4]);
return out;
}
/**
* Operation SubBytes, transforme les octet de in par la S-Box
* @param in tableau 4x4 representant les donnees sur lesquelles ont dois effectuer une substitution
* @return retourne un tableau 4x4 ou les octets sont substitues
*/
array<array<int, 4>, 4> AES_ENC::subBytes(array<array<int, 4>, 4> in)
{
array<array<int, 4>, 4> out;
for (int i = 0; i<4;i++){
for (int j=0;j<4;j++){
out[i][j]= sBox[in[i][j]];
}
}
return out;
}
/**
* Applique un decalage a gauche circulaire
* @param in matrice4x4 de donnees a applique le decalage circulaire e gauche
* @return retourne un tableau 4x4 sur lequel un decalage cirulaire e etait effectue
*/
array<array<int, 4>, 4> AES_ENC::shiftRows(array<array<int, 4>, 4> in)
{
array<array<int, 4>, 4> out;
for (int i=0;i<4;i++){
out[0][i]=in[0][i];
}
out[1][0] = in[1][1];
out[1][1] = in[1][2];
out[1][2] = in[1][3];
out[1][3] = in[1][0];
out[2][0] = in[2][2];
out[2][1] = in[2][3];
out[2][2] = in[2][0];
out[2][3] = in[2][1];
out[3][0] = in[3][3];
out[3][1] = in[3][0];
out[3][2] = in[3][1];
out[3][3] = in[3][2];
return out;
}
/**
* Traite les colonnes commes des polynomes de degres n et applique un produit matriciel sur chaque element
* @param in
* @return
*/
array<array<int, 4>, 4> AES_ENC::mixColumns(array<array<int, 4>, 4> in)
{
array<array<int, 4>, 4> out;
array<int, 4> sp;
for (int c = 0; c < 4; c++) {
sp[0] = (gf2Mult(0x02, in[0][c])) ^ (gf2Mult(0x03, in[1][c])) ^ in[2][c] ^ in[3][c];
sp[1] = in[0][c] ^ (gf2Mult(0x02, in[1][c])) ^ (gf2Mult(0x03, in[2][c])) ^ in[3][c];
sp[2] = in[0][c] ^ in[1][c] ^ (gf2Mult(0x02, in[2][c])) ^ (gf2Mult(0x03, in[3][c]));
sp[3] = (gf2Mult(0x03, in[0][c])) ^ in[1][c] ^ in[2][c] ^ (gf2Mult(0x02, in[3][c]));
for (int i = 0; i < 4; i++) out[i][c] = sp[i];
}
return out;
}
/****************************************************************************************************************
* Procédure de déchiffrement
****************************************************************************************************************/
/**
* Operation inverse de SuBytes
* @param in donnees e deSubytes
* @return retourne un tableau 4x4 ou les donnees sont plus substitues par la S-Box
*/
array<array<int, 4>, 4> AES_ENC::invSubBytes(array<array<int, 4>, 4> in)
{
array<array<int, 4>, 4> out;
for (int i = 0; i<4;i++){
for (int j=0;j<4;j++){
out[i][j]= invSBox[in[i][j]];
}
}
return out;
}
/**
* Inverse de ShiftRow, donc decalage a droite
* @param in
* @return
*/
array<array<int, 4>, 4> AES_ENC::invShiftRows(array<array<int, 4>, 4> in){
array<array<int, 4>, 4> out;
for (int i=0;i<4;i++){
out[0][i]=in[0][i];
}
out[1][1] = in[1][0];
out[1][2] = in[1][1];
out[1][3] = in[1][2];
out[1][0] = in[1][3];
out[2][2] = in[2][0];
out[2][3] = in[2][1];
out[2][0] = in[2][2];
out[2][1] = in[2][3];
out[3][3] = in[3][0];
out[3][0] = in[3][1];
out[3][1] = in[3][2];
out[3][2] = in[3][3];
return out;
}
/**
* Inverse de MixColumns
* @param in
* @return
*/
array<array<int, 4>, 4> AES_ENC::invMixColumns(array<array<int, 4>, 4> in)
{
array<array<int, 4>, 4> out;
array<int, 4> sp;
for (int c = 0; c < 4; c++) {
sp[0] = (gf2Mult(0x0e, in[0][c])) ^ (gf2Mult(0x0b, in[1][c])) ^
(gf2Mult(0x0d, in[2][c])) ^ (gf2Mult(0x09, in[3][c]));
sp[1] = (gf2Mult(0x09, in[0][c])) ^ (gf2Mult(0x0e, in[1][c])) ^
(gf2Mult(0x0b, in[2][c])) ^ (gf2Mult(0x0d, in[3][c]));
sp[2] = (gf2Mult(0x0d, in[0][c])) ^ (gf2Mult(0x09, in[1][c])) ^
(gf2Mult(0x0e, in[2][c])) ^ (gf2Mult(0x0b, in[3][c]));
sp[3] = (gf2Mult(0x0b, in[0][c])) ^ (gf2Mult(0x0d, in[1][c])) ^
(gf2Mult(0x09, in[2][c])) ^ (gf2Mult(0x0e, in[3][c]));
for (int i = 0; i < 4; i++) out[i][c] = sp[i];
}
return out;
}
int AES_ENC::xtime(int x){
x = x<<1;
if (x >> 8 == 1)
x = (x ^ 0x1B) & 0xff;
return x;
}
int AES_ENC::x_time(int x, int y){
if (y !=0){
for (int i=0; i<y;i++)
x = xtime(x);
}else{
x =0;
}
return x;
}
int AES_ENC::gf2Mult(int x, int y) {
int tmpres = 0;
int res = 0;
if (y >> 7 == 1) {
tmpres = x_time(x, 7);
res = tmpres;
}
for(unsigned int i=1;i<7;i++){ //On test tous les bits du 6eme au 2eme
if ((y<<24+i)>>31 == 1){
tmpres = x_time(x,7-i);
res = res^tmpres;
}
}
if ((y<<31)>>31 == 1) //Si le premier bit est a 1
res = res^x; //On Xor le resultat avec x
return res;
}
void AES_ENC::addTab(unsigned char in[], std::array<std::array<int, 4>, 4> add, int pos){
int t=0;
for (int i=pos; i<pos+16;i++){
if (i < 4)
in[i] = (unsigned char)(add[t/4][t%4]-128);
t++;
}
}
array<unsigned char, 4> AES_ENC::intToBytes(int i){
array<unsigned char, 4> res;
res[0] = (unsigned char)((i) >> 24);
res[1] = (unsigned char)((i) >> 16);
res[2] = (unsigned char)((i) >> 8);
res[3] = (unsigned char)((i));
return res;
}
/**
* Convertit 4 bytes en l'entier correspondant
*/
int AES_ENC::bytesToInt(array<unsigned char, 4> b){
return (b[0] & 0xFF) << 24 |
(b[1] & 0xFF) << 16 |
(b[2] & 0xFF) << 8 |
(b[3] & 0xFF);
}
}
} |
Je recherche un algorithme de chiffrement AES 128 bits en c++.
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