static uint32_t *expand_key(uint32_t *key, int *status) {
int i;
uint32_t temp, *W;
if((W = malloc(Nb * (Nr + 1) * sizeof(uint32_t))) == NULL) {
*status = LNC_ERR_MALLOC;
return NULL;
}
for(i = 0; i < Nk; i++)
W[i] = key[i];
for(i = Nk; i < Nb * (Nr + 1); i++) {
temp = W[i - 1];
if(i % Nk == 0) {
temp = sub_byte(rot_byte(temp)) ^ (rcon[i / Nk] << 24);
}
#if Nk > 6
else if(i % Nk == 4)
temp = sub_byte(temp);
#endif
W[i] = W[i - Nk] ^ temp;
}
*status = LNC_OK;
return W;
}
static void *key_expansion(uint32_t *key, uint32_t *w) {
int i;
uint32_t temp;
for(i = 0; i < NK; i++)
w[i] = key[i];
for(i = NK; i < NB * (NR + 1); i++) {
temp = w[i - 1];
if(i % NK == 0) {
temp = sub_byte(rot_byte(temp)) ^ (rcon[i / NK] << 24);
}
#if NK > 6
else if(i % NK == 4)
temp = sub_byte(temp);
#endif
w[i] = w[i - NK] ^ temp;
}
return w;
}
int main(int before_gen_k[4][4], int round){ /*get key into before_gen_k, get the round of encryption*/
int r_con[4][10] = {{0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
/*Just a tested matrix*/
/*int mat[4][4] = {{0x2b, 0x28, 0xab, 0x09},
{0x7e, 0xae, 0xf7, 0xcf},
{0x15, 0xd2, 0x15, 0x4f},
{0x16, 0xa6, 0x88, 0x3c}};*/
int i, j, temp, after_gen_k[4][4], k_sub_byte[4][1];
/*rot word
[a] ----- [b]
[b] | [c]
[c] | [d]
[d] -----> [a] */
temp = before_gen_k[0][3];
before_gen_k[0][3] = before_gen_k[1][3];
before_gen_k[1][3] = before_gen_k[2][3];
before_gen_k[2][3] = before_gen_k[3][3];
before_gen_k[3][3] = temp;
/*s_box*/
k_sub_byte = sub_byte(before_gen_k); /*sub_byte only last column*/
for(i=0; i<4; i++){
for(j=0; j<4; j++){
if (i==0)
{
after_gen_k[j][i] = before_gen_k[j][i] ^ k_sub_byte[j][0] ^ r_con[j][round];
/*put the generated key to after_gen_k*/
}
else
{
after_gen_k[j][i] = before_gen_k[j][i] ^ after_gen_k[j][i-1];
/*put the generated key to after_gen_k*/
}
}
}
return after_gen_k;
}
int main(){
int rounds, i, j, count, numberround, answer, rconround = 0, subbyteround = 0;;
char plaintext[17] = {'\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0'};
char key[17] = {'\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0'};
char index[16][3];
char indexkey[16][3];
char b[3], a[3];
printf("Input Text: ");
gets(plaintext);
printf("Input Key: ");
scanf(" %[^\n]s\n", key);
rounds = ceil(strlen(plaintext)/16);
for(i=0; i<16; i++){
sprintf(a, "%x", plaintext[i]); /* keep char ascii to hex base */
sprintf(b, "%x", key[i]);
strcpy(index[i], a);
strcpy(indexkey[i], b);
//printf("%x\n", index[i]);
//printf("%s\n", indexkey[i]);
}
for(i=0; i<16; i++){//we do add round key first before do 10 loop
//printf("%d\n", (((tonum(index[i][0]))*10)+(tonum(index[i][1]))));
answer = (((tonum(index[i][0]))*10)+(tonum(index[i][1])))^(((tonum(indexkey[i][0]))*10)+(tonum(indexkey[i][1])));
printf("%d\n", answer);
sprintf(a, "%x", answer);
printf("%s\n", a);
strcpy(index[i], a);
//printf("%s\n", index[i]);
}
for(numberround=1; numberround<=10; numberround++){
printf("%d %d\n", rconround,subbyteround);
if(numberround==1){
sub_byte_key(indexkey);
roundkey(matrixkey, rconround);
}
else{
roundkey(matrixkey, rconround);
}
sub_byte(index, subbyteround);
printf("roundkey:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrixkey[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
printf("Subbyte:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
shiftrow();
printf("shiftrow value:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
if(numberround<10){
mixcolumn();
printf("mixcolumn value:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
}
printf("-------------------------------------------\n");
addroundkey();
printf("Addroundkey value:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%c", matrix[j][i]);
}
//printf("\n");
}
printf("\n");
subbyteround++;
rconround++;
}
}
int main(){
int rounds, i, j, count, numberround;
char plaintext[17] = {'\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0'};
char key[17] = {'\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0'};
char index[16][3];
char indexkey[16][3];
char b[3], a[3];
printf("Input Text: ");
gets(plaintext);
printf("Input Key: ");
scanf(" %[^\n]s\n", key);
rounds = ceil(strlen(plaintext)/16);
for(i=0; i<16; i++){
sprintf(a, "%x", plaintext[i]); /* keep char ascii to hex base */
sprintf(b, "%x", key[i]);
strcpy(index[i], a);
strcpy(indexkey[i], b);
}
for(numberround=1; numberround<=10; numberround++){
if(numberround==1){
sub_byte_key(indexkey);
roundkey(matrixkey);
}
else{
roundkey(matrixkey);
}
sub_byte(index);
printf("roundkey:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrixkey[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
printf("Subbyte:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
shiftrow();
printf("shiftrow value:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
if(numberround<10){
mixcolumn();
printf("mixcolumn value:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
}
printf("-------------------------------------------\n");
addroundkey();
printf("Addroundkey value:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%c", cipher[i][j]);
}
}
printf("\n");
}
/*
for(i=0; i<16; i++){
sprintf(a, "%x", plaintext[i]); //keep char ascii to hex base
sprintf(b, "%x", key[i]);
strcpy(index[i], a);
strcpy(indexkey[i], b);
}
roundkey(indexkey);
sub_byte(index);
printf("matrixkey:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrixkey[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
printf("matrix:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
shiftrow();
printf("shiftrow value:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
mixcolumn();
printf("mixcolumn value:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
printf("-------------------------------------------\n");
addroundkey();
printf("Addroundkey value:\n");
for(i=0; i<4; i++){
for(j=0; j<4; j++){
printf("%x ", matrix[i][j]);
}
printf("\n");
}
*/
}
