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GeneralRe: Could anyone help me Pin
Shontay25-Feb-08 1:22
Shontay25-Feb-08 1:22 
QuestionRe: Could anyone help me Pin
Rajkumar R25-Feb-08 2:59
Rajkumar R25-Feb-08 2:59 
QuestionRe: Could anyone help me Pin
David Crow25-Feb-08 3:03
David Crow25-Feb-08 3:03 
GeneralRe: Could anyone help me Pin
Hamid_RT25-Feb-08 6:59
Hamid_RT25-Feb-08 6:59 
GeneralWifi channel api Pin
mjmim24-Feb-08 4:35
mjmim24-Feb-08 4:35 
GeneralAES Problem [modified] Pin
kartouss24-Feb-08 2:58
kartouss24-Feb-08 2:58 
GeneralRe: AES Problem Pin
bob1697224-Feb-08 6:06
bob1697224-Feb-08 6:06 
GeneralRe: AES Problem Pin
bob1697224-Feb-08 7:29
bob1697224-Feb-08 7:29 
/* I had a few spare minutes so I gave it look. I removed
all the noise and cleaned it up a bit so I could
navigate it easily.

NOTE: Files renamed to...

key.txt
input.txt
encrypted.txt
output.txt

WARNING: You might have a problem toward the very end
of the encrypt or decrypt code. ---------------->
-13224404 -14211046 ... -2885500 -3082625 -33457977777
*/

#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <windows.h>
#include <string.h>
#include <memory.h>
#include <process.h>
#include <tchar.h>
#include <dos.h>
#include <conio.h>
#include <fstream>
#include <string>
#include <time.h>

using namespace std;

double Add,sub,sft,mix;
double Add1,Add2,Add3,sub1,sub2,sft1,sft2,mix1;
double invadd1,invadd2,invadd3,invsub1,invsub2,invsft1,invsft2,invmix1;

typedef unsigned char word8;
typedef unsigned int word32;

word8 Logtable[256] = {
0, 0, 25, 1, 50, 2, 26, 198, 75, 199, 27, 104, 51, 238, 223, 3,
100, 4, 224, 14, 52, 141, 129, 239, 76, 113, 8, 200, 248, 105, 28, 193,
125, 194, 29, 181, 249, 185, 39, 106, 77, 228, 166, 114, 154, 201, 9, 120,
101, 47, 138, 5, 33, 15, 225, 36, 18, 240, 130, 69, 53, 147, 218, 142,
150, 143, 219, 189, 54, 208, 206, 148, 19, 92, 210, 241, 64, 70, 131, 56,
102, 221, 253, 48, 191, 6, 139, 98, 179, 37, 226, 152, 34, 136, 145, 16,
126, 110, 72, 195, 163, 182, 30, 66, 58, 107, 40, 84, 250, 133, 61, 186,
43, 121, 10, 21, 155, 159, 94, 202, 78, 212, 172, 229, 243, 115, 167, 87,
175, 88, 168, 80, 244, 234, 214, 116, 79, 174, 233, 213, 231, 230, 173, 232,
44, 215, 117, 122, 235, 22, 11, 245, 89, 203, 95, 176, 156, 169, 81, 160,
127, 12, 246, 111, 23, 196, 73, 236, 216, 67, 31, 45, 164, 118, 123, 183,
204, 187, 62, 90, 251, 96, 177, 134, 59, 82, 161, 108, 170, 85, 41, 157,
151, 178, 135, 144, 97, 190, 220, 252, 188, 149, 207, 205, 55, 63, 91, 209,
83, 57, 132, 60, 65, 162, 109, 71, 20, 42, 158, 93, 86, 242, 211, 171,
68, 17, 146, 217, 35, 32, 46, 137, 180, 124, 184, 38, 119, 153, 227, 165,
103, 74, 237, 222, 197, 49, 254, 24, 13, 99, 140, 128, 192, 247, 112, 7,
};

word8 Alogtable[256] = {
1, 3, 5, 15, 17, 51, 85, 255, 26, 46, 114, 150, 161, 248, 19, 53,
95, 225, 56, 72, 216, 115, 149, 164, 247, 2, 6, 10, 30, 34, 102, 170,
229, 52, 92, 228, 55, 89, 235, 38, 106, 190, 217, 112, 144, 171, 230, 49,
83, 245, 4, 12, 20, 60, 68, 204, 79, 209, 104, 184, 211, 110, 178, 205,
76, 212, 103, 169, 224, 59, 77, 215, 98, 166, 241, 8, 24, 40, 120, 136,
131, 158, 185, 208, 107, 189, 220, 127, 129, 152, 179, 206, 73, 219, 118, 154,
181, 196, 87, 249, 16, 48, 80, 240, 11, 29, 39, 105, 187, 214, 97, 163,
254, 25, 43, 125, 135, 146, 173, 236, 47, 113, 147, 174, 233, 32, 96, 160,
251, 22, 58, 78, 210, 109, 183, 194, 93, 231, 50, 86, 250, 21, 63, 65,
195, 94, 226, 61, 71, 201, 64, 192, 91, 237, 44, 116, 156, 191, 218, 117,
159, 186, 213, 100, 172, 239, 42, 126, 130, 157, 188, 223, 122, 142, 137, 128,
155, 182, 193, 88, 232, 35, 101, 175, 234, 37, 111, 177, 200, 67, 197, 84,
252, 31, 33, 99, 165, 244, 7, 9, 27, 45, 119, 153, 176, 203, 70, 202,
69, 207, 74, 222, 121, 139, 134, 145, 168, 227, 62, 66, 198, 81, 243, 14,
18, 54, 90, 238, 41, 123, 141, 140, 143, 138, 133, 148, 167, 242, 13, 23,
57, 75, 221, 124, 132, 151, 162, 253, 28, 36, 108, 180, 199, 82, 246, 1,
};

word8 S[256] = {
99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, 171, 118,
202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, 156, 164, 114, 192,
183, 253, 147, 38, 54, 63, 247, 204, 52, 165, 229, 241, 113, 216, 49, 21,
4, 199, 35, 195, 24, 150, 5, 154, 7, 18, 128, 226, 235, 39, 178, 117,
9, 131, 44, 26, 27, 110, 90, 160, 82, 59, 214, 179, 41, 227, 47, 132,
83, 209, 0, 237, 32, 252, 177, 91, 106, 203, 190, 57, 74, 76, 88, 207,
208, 239, 170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 80, 60, 159, 168,
81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 33, 16, 255, 243, 210,
205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126, 61, 100, 93, 25, 115,
96, 129, 79, 220, 34, 42, 144, 136, 70, 238, 184, 20, 222, 94, 11, 219,
224, 50, 58, 10, 73, 6, 36, 92, 194, 211, 172, 98, 145, 149, 228, 121,
231, 200, 55, 109, 141, 213, 78, 169, 108, 86, 244, 234, 101, 122, 174, 8,
186, 120, 37, 46, 28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138,
112, 62, 181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158,
225, 248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85, 40, 223,
140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15, 176, 84, 187, 22,
};

word8 Si[256] = {
82, 9, 106, 213, 48, 54, 165, 56, 191, 64, 163, 158, 129, 243, 215, 251,
124, 227, 57, 130, 155, 47, 255, 135, 52, 142, 67, 68, 196, 222, 233, 203,
84, 123, 148, 50, 166, 194, 35, 61, 238, 76, 149, 11, 66, 250, 195, 78,
8, 46, 161, 102, 40, 217, 36, 178, 118, 91, 162, 73, 109, 139, 209, 37,
114, 248, 246, 100, 134, 104, 152, 22, 212, 164, 92, 204, 93, 101, 182, 146,
108, 112, 72, 80, 253, 237, 185, 218, 94, 21, 70, 87, 167, 141, 157, 132,
144, 216, 171, 0, 140, 188, 211, 10, 247, 228, 88, 5, 184, 179, 69, 6,
208, 44, 30, 143, 202, 63, 15, 2, 193, 175, 189, 3, 1, 19, 138, 107,
58, 145, 17, 65, 79, 103, 220, 234, 151, 242, 207, 206, 240, 180, 230, 115,
150, 172, 116, 34, 231, 173, 53, 133, 226, 249, 55, 232, 28, 117, 223, 110,
71, 241, 26, 113, 29, 41, 197, 137, 111, 183, 98, 14, 170, 24, 190, 27,
252, 86, 62, 75, 198, 210, 121, 32, 154, 219, 192, 254, 120, 205, 90, 244,
31, 221, 168, 51, 136, 7, 199, 49, 177, 18, 16, 89, 39, 128, 236, 95,
96, 81, 127, 169, 25, 181, 74, 13, 45, 229, 122, 159, 147, 201, 156, 239,
160, 224, 59, 77, 174, 42, 245, 176, 200, 235, 187, 60, 131, 83, 153, 97,
23, 43, 4, 126, 186, 119, 214, 38, 225, 105, 20, 99, 85, 33, 12, 125,
};

word32 RC[30] = {
0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,
0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e,
0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d,
0xfa, 0xef, 0xc5
};

#define MAXBC 8
#define MAXKC 8
#define MAXROUNDS 14

static word8 shifts[5][4] = {
0, 1, 2, 3,
0, 1, 2, 3,
0, 1, 2, 3,
0, 1, 2, 4,
0, 1, 3, 4
};

static int numrounds[5][5] = {
10, 11, 12, 13, 14,
11, 11, 12, 13, 14,
12, 12, 12, 13, 14,
13, 13, 13, 13, 14,
14, 14, 14, 14, 14
};

int BC, KC, ROUNDS;

word8 mul(word8 a, word8 b) {

if (a && b) {
return Alogtable[(Logtable[a] + Logtable[b])%255];
} else {
return 0;
}
}

void AddRoundKey(word8 a[4][MAXBC], word8 rk[4][MAXBC])
{
int i, j;

for (i=0; i<4; i++) {
for(j=0; j<4; j++) {
a[i][j] ^= rk[i][j];
}
}
}

void SubBytes(word8 a[4][MAXBC], word8 box[256])
{
int i, j;

for (i=0; i<4; i++) {
for(j=0; j< BC; j++) {
a[i][j] = box[a[i][j]];
}
}
}

void ShiftRows(word8 a[4][MAXBC], word8 d)
{

word8 tmp[MAXBC];
int i, j;

if ( d==0) {
for (i=0; i<4; i++) {

for(j=0; j< BC; j++) {
tmp[j] = a[i][(j + shifts[BC-4][i]) % BC];
}

for(j=0; j< BC; j++) {
a[i][j] = tmp[j];
}
}

} else { // for ShiftRows-decryption

for (i=0; i<4; i++) {

for(j=0; j< BC; j++) {
tmp[j] = a[i][(j + 4 - i) % BC];
}

for(j=0; j< BC; j++) {
a[i][j] = tmp[j];
}
}
}
}

void MixColumns(word8 a[4][MAXBC]) {

word8 b[4][MAXBC];
int i, j;

for(j=0; j<BC; j++) {
for(i=0; i<4; i++) {

b[i][j] = mul(2,a[i][j])
^ mul(3,a[(i+1)%4][j])
^ a[(i+2) % 4][j]
^ a[(i+3) % 4][j];
}
}

for(i=0; i<4; i++) {
for(j=0; j< BC; j++) {
a[i][j] = b[i][j];
}
}
}

void InvMixColumns(word8 a[4][MAXBC])
{
word8 b[4][MAXBC];
int i, j;

for(j=0; j<BC; j++) {
for(i=0; i<4; i++) {

b[i][j] = mul(0xe,a[i][j])
^ mul(0xb,a[(i+1) % 4][j])
^ mul(0xd,a[(i+2) % 4][j])
^ mul(0x9,a[(i+3) % 4][j]);
}
}

for(i=0; i<4; i++) {
for(j=0; j< BC; j++) {
a[i][j] = b[i][j];
}
}
}

int KeyExpansion (word8 k[4][MAXKC], word8 W[MAXROUNDS+1][4][MAXBC])
{
int i, j, t, RCpointer = 1;
word8 tk[4][MAXKC];

for(j=0; j< KC; j++) {
for (i=0; i<4; i++) {
tk[i][j] = k[i][j];
}
}

t=0;

for (j=0; (j<KC) && (t<(ROUNDS+1) * BC); j++, t++) {

for ( i=0; i<4; i++) {
W[t / BC][i][t % BC] = tk[i][j];
}
}

while (t < (ROUNDS + 1)*BC) {

for(i=0; i<4; i++) {
tk[i][0] ^= S[tk[(i+1)%4][KC-1]];
}
tk[0][0] ^= RC[RCpointer++];
if (KC <= 6 ) {
for (j=1; j < KC; j++) {
for(i=0; i<4; i++) {
tk[i][j] ^= tk[i][j-1];
}
}

} else {

for (j=1; j < 4; j++) {
for(i=0; i<4; i++) {
tk[i][j] ^= tk[i][j-1];
}
}

for(i=0; i<4; i++) {
tk[i][4] ^= S[tk[i][3]];
}

for (j=5; j < KC; j++) {
for(i=0; i<4; i++) {
tk[i][j] ^= tk[i][j-1];
}
}
}

for (j=0; (j < KC) && (t<(ROUNDS+1)*BC); j++, t++) {
for(i=0; i<4; i++) W[t/BC][i][t%BC] = tk[i][j];
}
}
return 0;
}

int Encrypt (word8 a[4][MAXBC], word8 rk[MAXROUNDS+1][4][MAXBC])
{
int r;

AddRoundKey(a, rk[0]);

for ( r=1; r < ROUNDS; r++) {

SubBytes (a,S);
ShiftRows(a,0);
MixColumns(a);
AddRoundKey(a,rk[r]);
}

SubBytes (a,S);
ShiftRows(a,0);
AddRoundKey(a,rk[ROUNDS]);//round

return 0;
}

int Decrypt (word8 a[4][MAXBC], word8 rk[MAXROUNDS+1][4][MAXBC])
{
int r;

AddRoundKey(a, rk[ROUNDS]);//round
SubBytes(a, Si);
ShiftRows(a,1);

for ( r=ROUNDS-1; r > 0; r--) {

AddRoundKey(a,rk[r]);
InvMixColumns(a);
SubBytes (a,Si);
ShiftRows(a,1);
}

AddRoundKey(a,rk[0]);

return 0;
}

int main()
{

int i, j;
int Nr=0;

word8 a[4][MAXBC], rk[MAXROUNDS+1][4][MAXBC], sk[4][MAXKC];
BC = 4;

while (Nr!=128 && Nr!=192 && Nr!=256) {

printf("Enter the length of Key(128, 192 or 256 only): ");
scanf("%d",&Nr);
}

KC = Nr / 32;

ROUNDS = numrounds[KC-4][BC-4];

cout<<endl;

char key;
ifstream fileKey ("key.txt");
if (fileKey.is_open()) {

for ( j=0; j<KC; j++) {
for ( i=0; i < 4; i++) {

fileKey.get(key);
sk[i][j] = key;
}
}

fileKey.close();
} else {
cout << "Unable to open file";
}

KeyExpansion (sk, rk);

{ // Encrypting the data

char d;
ifstream fileInput ("input.txt");
ofstream fileEncrypted ("encrypted.txt");

fileInput.get(d);

while(!fileInput.eof()) {

for ( j=0; j<BC; j++) {
for ( i=0; i < 4; i++) {

a[i][j] = d;
fileInput.get(d);
}
}

Encrypt(a, rk);

if (fileEncrypted.is_open()) {
for(j=0; j< BC; j ++) {
for ( i=0; i<4; i++) {
fileEncrypted<<a[i][j];
}
}
} else {
cout << "Unable to open file";
}
}

fileEncrypted.close();
fileInput.close();
}

{ // Decrypting the data

char dxc;
ifstream fileEncrypted ("encrypted.txt");
ofstream fileOutput ("output.txt");

fileEncrypted.get(dxc); //priming read

while(!fileEncrypted.eof()) {

for ( j=0; j<BC; j++) {
for ( i=0; i < 4; i++) {

a[i][j] = dxc;
fileEncrypted.get(dxc);
}
}

Decrypt(a, rk);

if (fileOutput.is_open()) {

for(j=0; j<BC; j++) {
for ( i=0; i<4; i++) {
fileOutput<<a[i][j];
}
}

} else {
cout << "Unable to open file";
}
}

cout<<endl;

fileOutput.close();
fileEncrypted.close();
}

return 0;
}
GeneralRe: AES Problem Pin
bob1697224-Feb-08 10:17
bob1697224-Feb-08 10:17 
GeneralRe: AES Problem Pin
Rajkumar R24-Feb-08 20:54
Rajkumar R24-Feb-08 20:54 
GeneralRe: AES Problem Pin
Maxwell Chen24-Feb-08 21:03
Maxwell Chen24-Feb-08 21:03 
GeneralRe: AES Problem Pin
Rajkumar R24-Feb-08 21:53
Rajkumar R24-Feb-08 21:53 
GeneralRe: AES Problem Pin
BadKarma24-Feb-08 22:19
BadKarma24-Feb-08 22:19 
GeneralRe: AES Problem Pin
bob1697225-Feb-08 2:01
bob1697225-Feb-08 2:01 
GeneralCall of OnCreate in a CTreeCtrl derived class Pin
madmax000124-Feb-08 2:54
madmax000124-Feb-08 2:54 
QuestionRe: Call of OnCreate in a CTreeCtrl derived class Pin
prasad_som24-Feb-08 3:10
prasad_som24-Feb-08 3:10 
GeneralRe: Call of OnCreate in a CTreeCtrl derived class Pin
madmax000124-Feb-08 3:24
madmax000124-Feb-08 3:24 
GeneralRe: Call of OnCreate in a CTreeCtrl derived class Pin
prasad_som24-Feb-08 3:34
prasad_som24-Feb-08 3:34 
GeneralRe: Call of OnCreate in a CTreeCtrl derived class Pin
madmax000124-Feb-08 3:51
madmax000124-Feb-08 3:51 
GeneralRe: Call of OnCreate in a CTreeCtrl derived class Pin
Mark Salsbery24-Feb-08 9:00
Mark Salsbery24-Feb-08 9:00 
GeneralRe: Call of OnCreate in a CTreeCtrl derived class Pin
madmax000124-Feb-08 9:25
madmax000124-Feb-08 9:25 
GeneralRe: Call of OnCreate in a CTreeCtrl derived class Pin
Julberto Danray24-Feb-08 14:59
Julberto Danray24-Feb-08 14:59 
GeneralRe: Call of OnCreate in a CTreeCtrl derived class Pin
Mark Salsbery24-Feb-08 20:49
Mark Salsbery24-Feb-08 20:49 
GeneralRe: Call of OnCreate in a CTreeCtrl derived class Pin
Julberto Danray25-Feb-08 4:19
Julberto Danray25-Feb-08 4:19 
GeneralRe: Call of OnCreate in a CTreeCtrl derived class Pin
Mark Salsbery25-Feb-08 5:40
Mark Salsbery25-Feb-08 5:40 
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