Hello,
I am using the AES to encrypt and decrypt data from a txt file... but when decyrpted back i am getting the text + garbage
For example i am encrypting the pixel values of an image...
-13224404 -14211046 -14605042 -13682410 -12298975 -11245015 -10322644 -9532112 -8609993 -7490750 -6240432 -5516455 -4990625 -4332695 -3675534 -3412107 -3082376 -2753413 -2687618 -2884997 -3082374 -3082628 -3345799 -3740555 -3675016 -3675013 -3675267 -3609474 -3412093 -3214714 -3017333 -2885749 -2557300 -2425716 -2622326 -2885500 -3082625 -3345797
When decrypted back i am getting:-
-13224404 -14211046 -14605042 -Å-¯SôEÔµ¼g4µË
Please help me out how to solve this problem... I am fwding the codes:-
<br />
#include<iostream.h><br />
#include <stdio.h><br />
#include <stdlib.h><br />
#include <assert.h><br />
#include <windows.h><br />
#include <string.h><br />
#include <memory.h><br />
#include <process.h><br />
#include <tchar.h><br />
#include <dos.h><br />
#include <conio.h><br />
#include <fstream><br />
#include <string><br />
using namespace std;<br />
<br />
#include <time.h><br />
<br />
double start_time , stop_time;<br />
<br />
double Add,sub,sft,mix;<br />
double Add1,Add2,Add3,sub1,sub2,sft1,sft2,mix1;<br />
double invadd1,invadd2,invadd3,invsub1,invsub2,invsft1,invsft2,invmix1;<br />
static int count1, count2= 0;<br />
<br />
<br />
double freq;<br />
long start;<br />
<br />
<br />
void sec_init(void)<br />
{<br />
LARGE_INTEGER lFreq, lCnt;<br />
QueryPerformanceFrequency(&lFreq);<br />
freq = (double)lFreq.LowPart;<br />
QueryPerformanceCounter(&lCnt);<br />
start = lCnt.LowPart;<br />
}<br />
<br />
<br />
double sec(void)<br />
{<br />
LARGE_INTEGER lCnt;<br />
long tcnt;<br />
QueryPerformanceCounter(&lCnt);<br />
tcnt = lCnt.LowPart - start;<br />
return ((double)tcnt) / freq;<br />
}<br />
<br />
<br />
typedef unsigned char word8;<br />
typedef unsigned int word32;<br />
<br />
<br />
<br />
word8 Logtable[256] = {<br />
0, 0, 25, 1, 50, 2, 26, 198, 75, 199, 27, 104, 51, 238, 223, 3,<br />
100, 4, 224, 14, 52, 141, 129, 239, 76, 113, 8, 200, 248, 105, 28, 193,<br />
125, 194, 29, 181, 249, 185, 39, 106, 77, 228, 166, 114, 154, 201, 9, 120,<br />
101, 47, 138, 5, 33, 15, 225, 36, 18, 240, 130, 69, 53, 147, 218, 142,<br />
150, 143, 219, 189, 54, 208, 206, 148, 19, 92, 210, 241, 64, 70, 131, 56,<br />
102, 221, 253, 48, 191, 6, 139, 98, 179, 37, 226, 152, 34, 136, 145, 16,<br />
126, 110, 72, 195, 163, 182, 30, 66, 58, 107, 40, 84, 250, 133, 61, 186,<br />
43, 121, 10, 21, 155, 159, 94, 202, 78, 212, 172, 229, 243, 115, 167, 87,<br />
175, 88, 168, 80, 244, 234, 214, 116, 79, 174, 233, 213, 231, 230, 173, 232,<br />
44, 215, 117, 122, 235, 22, 11, 245, 89, 203, 95, 176, 156, 169, 81, 160,<br />
127, 12, 246, 111, 23, 196, 73, 236, 216, 67, 31, 45, 164, 118, 123, 183,<br />
204, 187, 62, 90, 251, 96, 177, 134, 59, 82, 161, 108, 170, 85, 41, 157,<br />
151, 178, 135, 144, 97, 190, 220, 252, 188, 149, 207, 205, 55, 63, 91, 209,<br />
83, 57, 132, 60, 65, 162, 109, 71, 20, 42, 158, 93, 86, 242, 211, 171,<br />
68, 17, 146, 217, 35, 32, 46, 137, 180, 124, 184, 38, 119, 153, 227, 165,<br />
103, 74, 237, 222, 197, 49, 254, 24, 13, 99, 140, 128, 192, 247, 112, 7,<br />
};<br />
<br />
word8 Alogtable[256] = {<br />
1, 3, 5, 15, 17, 51, 85, 255, 26, 46, 114, 150, 161, 248, 19, 53,<br />
95, 225, 56, 72, 216, 115, 149, 164, 247, 2, 6, 10, 30, 34, 102, 170,<br />
229, 52, 92, 228, 55, 89, 235, 38, 106, 190, 217, 112, 144, 171, 230, 49,<br />
83, 245, 4, 12, 20, 60, 68, 204, 79, 209, 104, 184, 211, 110, 178, 205,<br />
76, 212, 103, 169, 224, 59, 77, 215, 98, 166, 241, 8, 24, 40, 120, 136,<br />
131, 158, 185, 208, 107, 189, 220, 127, 129, 152, 179, 206, 73, 219, 118, 154,<br />
181, 196, 87, 249, 16, 48, 80, 240, 11, 29, 39, 105, 187, 214, 97, 163,<br />
254, 25, 43, 125, 135, 146, 173, 236, 47, 113, 147, 174, 233, 32, 96, 160,<br />
251, 22, 58, 78, 210, 109, 183, 194, 93, 231, 50, 86, 250, 21, 63, 65,<br />
195, 94, 226, 61, 71, 201, 64, 192, 91, 237, 44, 116, 156, 191, 218, 117,<br />
159, 186, 213, 100, 172, 239, 42, 126, 130, 157, 188, 223, 122, 142, 137, 128,<br />
155, 182, 193, 88, 232, 35, 101, 175, 234, 37, 111, 177, 200, 67, 197, 84,<br />
252, 31, 33, 99, 165, 244, 7, 9, 27, 45, 119, 153, 176, 203, 70, 202,<br />
69, 207, 74, 222, 121, 139, 134, 145, 168, 227, 62, 66, 198, 81, 243, 14,<br />
18, 54, 90, 238, 41, 123, 141, 140, 143, 138, 133, 148, 167, 242, 13, 23,<br />
57, 75, 221, 124, 132, 151, 162, 253, 28, 36, 108, 180, 199, 82, 246, 1,<br />
};<br />
<br />
word8 S[256] = {<br />
99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, 171, 118,<br />
202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, 156, 164, 114, 192,<br />
183, 253, 147, 38, 54, 63, 247, 204, 52, 165, 229, 241, 113, 216, 49, 21,<br />
4, 199, 35, 195, 24, 150, 5, 154, 7, 18, 128, 226, 235, 39, 178, 117,<br />
9, 131, 44, 26, 27, 110, 90, 160, 82, 59, 214, 179, 41, 227, 47, 132,<br />
83, 209, 0, 237, 32, 252, 177, 91, 106, 203, 190, 57, 74, 76, 88, 207,<br />
208, 239, 170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 80, 60, 159, 168,<br />
81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 33, 16, 255, 243, 210,<br />
205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126, 61, 100, 93, 25, 115,<br />
96, 129, 79, 220, 34, 42, 144, 136, 70, 238, 184, 20, 222, 94, 11, 219,<br />
224, 50, 58, 10, 73, 6, 36, 92, 194, 211, 172, 98, 145, 149, 228, 121,<br />
231, 200, 55, 109, 141, 213, 78, 169, 108, 86, 244, 234, 101, 122, 174, 8,<br />
186, 120, 37, 46, 28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138,<br />
112, 62, 181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158,<br />
225, 248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85, 40, 223,<br />
140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15, 176, 84, 187, 22,<br />
};<br />
<br />
word8 Si[256] = {<br />
82, 9, 106, 213, 48, 54, 165, 56, 191, 64, 163, 158, 129, 243, 215, 251,<br />
124, 227, 57, 130, 155, 47, 255, 135, 52, 142, 67, 68, 196, 222, 233, 203,<br />
84, 123, 148, 50, 166, 194, 35, 61, 238, 76, 149, 11, 66, 250, 195, 78,<br />
8, 46, 161, 102, 40, 217, 36, 178, 118, 91, 162, 73, 109, 139, 209, 37,<br />
114, 248, 246, 100, 134, 104, 152, 22, 212, 164, 92, 204, 93, 101, 182, 146,<br />
108, 112, 72, 80, 253, 237, 185, 218, 94, 21, 70, 87, 167, 141, 157, 132,<br />
144, 216, 171, 0, 140, 188, 211, 10, 247, 228, 88, 5, 184, 179, 69, 6,<br />
208, 44, 30, 143, 202, 63, 15, 2, 193, 175, 189, 3, 1, 19, 138, 107,<br />
58, 145, 17, 65, 79, 103, 220, 234, 151, 242, 207, 206, 240, 180, 230, 115,<br />
150, 172, 116, 34, 231, 173, 53, 133, 226, 249, 55, 232, 28, 117, 223, 110,<br />
71, 241, 26, 113, 29, 41, 197, 137, 111, 183, 98, 14, 170, 24, 190, 27,<br />
252, 86, 62, 75, 198, 210, 121, 32, 154, 219, 192, 254, 120, 205, 90, 244,<br />
31, 221, 168, 51, 136, 7, 199, 49, 177, 18, 16, 89, 39, 128, 236, 95,<br />
96, 81, 127, 169, 25, 181, 74, 13, 45, 229, 122, 159, 147, 201, 156, 239,<br />
160, 224, 59, 77, 174, 42, 245, 176, 200, 235, 187, 60, 131, 83, 153, 97,<br />
23, 43, 4, 126, 186, 119, 214, 38, 225, 105, 20, 99, 85, 33, 12, 125,<br />
};<br />
<br />
word32 RC[30] = {<br />
0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,<br />
0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e,<br />
0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d,<br />
0xfa, 0xef, 0xc5};<br />
<br />
#define MAXBC 8<br />
#define MAXKC 8<br />
#define MAXROUNDS 14<br />
<br />
static word8 shifts[5][4] = {<br />
0, 1, 2, 3,<br />
0, 1, 2, 3,<br />
0, 1, 2, 3,<br />
0, 1, 2, 4,<br />
0, 1, 3, 4};<br />
<br />
static int numrounds[5][5] = {<br />
10, 11, 12, 13, 14,<br />
11, 11, 12, 13, 14,<br />
12, 12, 12, 13, 14,<br />
13, 13, 13, 13, 14,<br />
14, 14, 14, 14, 14};<br />
<br />
int BC, KC, ROUNDS;<br />
<br />
word8 mul(word8 a, word8 b) {<br />
<br />
if (a && b)<br />
return Alogtable[(Logtable[a] + Logtable[b])%255];<br />
else return 0;<br />
}<br />
<br />
void AddRoundKey(word8 a[4][MAXBC], word8 rk[4][MAXBC])<br />
{<br />
<br />
<br />
int i, j;<br />
for (i=0; i<4; i++)<br />
for(j=0; j<4; j++)<br />
a[i][j] ^= rk[i][j];<br />
<br />
}<br />
<br />
void SubBytes(word8 a[4][MAXBC], word8 box[256])<br />
{<br />
<br />
int i, j;<br />
for (i=0; i<4; i++)<br />
for(j=0; j< BC; j++)<br />
a[i][j] = box[a[i][j]];<br />
}<br />
<br />
void ShiftRows(word8 a[4][MAXBC], word8 d)<br />
{<br />
<br />
word8 tmp[MAXBC];<br />
int i, j;<br />
<br />
if ( d==0)
{<br />
for (i=0; i<4; i++)<br />
{<br />
for(j=0; j< BC; j++)<br />
tmp[j] = a[i][(j + shifts[BC-4][i]) % BC];<br />
for(j=0; j< BC; j++)<br />
a[i][j] = tmp[j];<br />
}<br />
}<br />
else
{<br />
for (i=0; i<4; i++)<br />
{<br />
for(j=0; j< BC; j++)<br />
tmp[j] = a[i][(j + 4 - i) % BC];<br />
<br />
for(j=0; j< BC; j++)<br />
a[i][j] = tmp[j];<br />
}<br />
}<br />
<br />
}<br />
<br />
void MixColumns(word8 a[4][MAXBC]) {<br />
<br />
word8 b[4][MAXBC];<br />
int i, j;<br />
for(j=0; j for(i=0; i<4; i++)<br />
b[i][j] = mul(2,a[i][j])<br />
^ mul(3,a[(i+1)%4][j])<br />
^ a[(i+2) % 4][j]<br />
^ a[(i+3) % 4][j];<br />
for(i=0; i<4; i++)<br />
for(j=0; j< BC; j++)<br />
a[i][j] = b[i][j];<br />
}<br />
<br />
void InvMixColumns(word8 a[4][MAXBC])<br />
{<br />
<br />
word8 b[4][MAXBC];<br />
<br />
int i, j;<br />
<br />
for(j=0; j for(i=0; i<4; i++)<br />
b[i][j] = mul(0xe,a[i][j])<br />
^ mul(0xb,a[(i+1) % 4][j])<br />
^ mul(0xd,a[(i+2) % 4][j])<br />
^ mul(0x9,a[(i+3) % 4][j]);<br />
<br />
for(i=0; i<4; i++)<br />
for(j=0; j< BC; j++)<br />
a[i][j] = b[i][j];<br />
<br />
}<br />
<br />
int KeyExpansion (word8 k[4][MAXKC], word8 W[MAXROUNDS+1][4][MAXBC])<br />
{<br />
<br />
<br />
int i, j, t, RCpointer = 1;<br />
<br />
word8 tk[4][MAXKC];<br />
for(j=0; j< KC; j++)<br />
for (i=0; i<4; i++)<br />
tk[i][j] = k[i][j];<br />
t=0;<br />
<br />
for (j=0; (j<(rounds+1) *="" bc="" );="" j++,="" t++)for ( i=0; i<4; i++) W[t / BC][i][t % BC] = tk[i][j];<br />
while (t < (ROUNDS + 1)*BC) {<br />
<br />
for(i=0; i<4; i++)<br />
tk[i][0] ^= S[tk[(i+1)%4][KC-1]];<br />
tk[0][0] ^= RC[RCpointer++];<br />
if (KC <= 6 )<br />
for (j=1; j < KC; j++)<br />
for(i=0; i<4; i++)<br />
tk[i][j] ^= tk[i][j-1];<br />
else {<br />
for (j=1; j < 4; j++)<br />
for(i=0; i<4; i++)<br />
tk[i][j] ^= tk[i][j-1];<br />
for(i=0; i<4; i++) tk[i][4] ^= S[tk[i][3]];<br />
for (j=5; j < KC; j++)<br />
for(i=0; i<4; i++)<br />
tk[i][j] ^= tk[i][j-1];<br />
}<br />
<br />
for (j=0; (j < KC) && (t<(ROUNDS+1)*BC); j++, t++)<br />
for(i=0; i<4; i++) W[t/BC][i][t%BC] = tk[i][j];<br />
}<br />
return 0;<br />
}<br />
<br />
int Encrypt (word8 a[4][MAXBC], word8 rk[MAXROUNDS+1][4][MAXBC])<br />
{<br />
<br />
int r;<br />
<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
AddRoundKey(a, rk[0]);<br />
<br />
stop_time = sec();<br />
Add1 = (stop_time - start_time);<br />
<br />
<br />
for ( r=1; r < ROUNDS; r++)<br />
{<br />
sec_init();<br />
start_time = sec();<br />
<br />
SubBytes (a,S);<br />
<br />
stop_time = sec();<br />
sub1 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
ShiftRows(a,0);<br />
<br />
stop_time = sec();<br />
sft1 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
MixColumns(a);<br />
<br />
stop_time = sec();<br />
mix1 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
AddRoundKey(a,rk[r]);<br />
<br />
stop_time = sec();<br />
Add2 = (stop_time - start_time);<br />
}<br />
<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
SubBytes (a,S);<br />
<br />
stop_time = sec();<br />
sub2 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
ShiftRows(a,0);<br />
<br />
stop_time = sec();<br />
sft2 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
AddRoundKey(a,rk[ROUNDS]);
<br />
stop_time = sec();<br />
Add3 = (stop_time - start_time);<br />
<br />
return 0;<br />
}<br />
<br />
int Decrypt (word8 a[4][MAXBC], word8 rk[MAXROUNDS+1][4][MAXBC])<br />
{<br />
int r;<br />
<br />
<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
AddRoundKey(a, rk[ROUNDS]);
<br />
stop_time = sec();<br />
invadd1 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
SubBytes(a, Si);<br />
<br />
stop_time = sec();<br />
invsub1 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
ShiftRows(a,1);<br />
<br />
stop_time = sec();<br />
invsft1 = (stop_time - start_time);<br />
<br />
for ( r=ROUNDS-1; r > 0; r--)<br />
{<br />
sec_init();<br />
start_time = sec();<br />
<br />
AddRoundKey(a,rk[r]);<br />
<br />
stop_time = sec();<br />
invadd2 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
InvMixColumns(a);<br />
<br />
stop_time = sec();<br />
invmix1 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
SubBytes (a,Si);<br />
<br />
stop_time = sec();<br />
invsub2 = (stop_time - start_time);<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
ShiftRows(a,1);<br />
<br />
stop_time = sec();<br />
invsft2 = (stop_time - start_time);<br />
}<br />
<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
AddRoundKey(a,rk[0]);<br />
<br />
stop_time = sec();<br />
invadd3 = (stop_time - start_time);<br />
<br />
return 0;<br />
}<br />
<br />
int counter1()<br />
{<br />
count1++;<br />
return 0;<br />
}<br />
<br />
int counter2()<br />
{<br />
count2++;<br />
return 0;<br />
}<br />
<br />
int main()<br />
{<br />
<br />
int i, j;<br />
<br />
int Nr=0;<br />
<br />
double Add,sub,sft,mix;
double invadd,invsub,invsft,invmix;
double keysh_time;
double encryptTime,decryptTime;<br />
<br />
<br />
word8 a[4][MAXBC], rk[MAXROUNDS+1][4][MAXBC], sk[4][MAXKC];<br />
BC = 4;<br />
<br />
<br />
printf("\n --- Advanced Encryption Standard --- \n");<br />
printf("\n\n");<br />
<br />
while(Nr!=128 && Nr!=192 && Nr!=256)<br />
{<br />
printf("Enter the length of Key(128, 192 or 256 only): ");<br />
scanf("%d",&Nr);<br />
}<br />
<br />
KC = Nr / 32;<br />
<br />
{<br />
<br />
ROUNDS = numrounds[KC-4][BC-4];<br />
<br />
cout<<endl;<br />
<br />
char key;<br />
ifstream myfile2 ("Key.txt");<br />
if (myfile2.is_open())<br />
{<br />
for ( j=0; j for ( i=0; i < 4; i++)<br />
{<br />
myfile2.get(key);<br />
sk[i][j] = key;
}<br />
<br />
myfile2.close();<br />
}<br />
else<br />
cout << "Unable to open file";<br />
<br />
sec_init();<br />
start_time = sec();<br />
<br />
KeyExpansion (sk, rk);<br />
<br />
stop_time = sec();<br />
keysh_time = (stop_time - start_time);<br />
<br />
char d;<br />
ifstream myfile1 ("myfile1.txt");<br />
ofstream myfile3 ("Ciphertext.txt");<br />
<br />
myfile1.get(d);
<br />
while(!myfile1.eof())<br />
{<br />
for ( j=0; j for ( i=0; i < 4; i++)<br />
{<br />
a[i][j] = d;
myfile1.get(d);
}<br />
<br />
<br />
Encrypt(a, rk);<br />
counter1();<br />
<br />
<br />
if (myfile3.is_open())<br />
{<br />
for(j=0; j< BC; j ++)<br />
for ( i=0; i<4; i++)<br />
myfile3<<a[i][j];<br />
}<br />
else<br />
cout << "Unable to open file";<br />
}<br />
<br />
myfile3.close();<br />
myfile1.close();<br />
<br />
char dxc;<br />
ifstream myfile4 ("Ciphertext.txt");<br />
ofstream myfile5 ("Text.txt");<br />
<br />
myfile4.get(dxc);
<br />
while(!myfile4.eof())<br />
{<br />
for ( j=0; j for ( i=0; i < 4; i++)<br />
{<br />
a[i][j] = dxc;
myfile4.get(dxc);
}<br />
<br />
<br />
Decrypt(a, rk);<br />
counter2();<br />
<br />
<br />
if (myfile5.is_open())<br />
{<br />
for(j=0; j for ( i=0; i<4; i++)<br />
myfile5<<a[i][j];<br />
}<br />
else<br />
cout << "Unable to open file";<br />
}<br />
<br />
myfile5.close();<br />
myfile4.close();<br />
<br />
<br />
cout<<endl;<br />
cout<<" *********** AES Encryption using "<<Nr<<" bits"<<" ********** "<<endl;<br />
cout<<endl;<br />
<br />
cout<<"Key : ";<br />
for(j=0; j< KC; j ++)<br />
for ( i=0; i<4; i++)<br />
cout<<sk[i][j];<br />
cout<<endl;<br />
<br />
cout<<endl;<br />
<br />
cout<<" ----- AES Encryption Time for 1 Operation ----- "<<endl<<endl;<br />
<br />
<br />
Add = (Add1 + Add2*(ROUNDS-1) + Add3)*count1;<br />
sub = (sub1*(ROUNDS-1) + sub2)*count1;<br />
sft = (sft1*(ROUNDS-1) + sft2)*count1;<br />
mix = (mix1*(ROUNDS-1))*count1;<br />
<br />
encryptTime = Add + sub + sft + mix;<br />
<br />
printf("Key Expansion Time : ");<br />
printf("%lf ", keysh_time);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("AddRoundKey Time : ");<br />
printf("%lf ", Add);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("SubBytes Time : ");<br />
printf("%lf ", sub);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("ShiftRow Time : ");<br />
printf("%lf ", sft);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("MixColunms Time : ");<br />
printf("%lf ", mix);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("Encrytion Time : ");<br />
printf("%lf ", encryptTime);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
cout<<"Number of plaintext blocks of 16 bytes created: "<<count1<<endl;<br />
<br />
cout<<endl;<br />
cout<<" *********** AES Decryption using "<<Nr<<" bits"<<" ********** "<<endl;<br />
cout<<endl;<br />
<br />
cout<<"Key : ";<br />
for(j=0; j< KC; j ++)<br />
for ( i=0; i<4; i++)<br />
cout<<sk[i][j];<br />
cout<<endl;<br />
}<br />
<br />
invadd = (invadd1 + invadd2*(ROUNDS-1) + invadd3)*count2;<br />
invsub = (invsub1 + invsub2*(ROUNDS-1))*count2;<br />
invsft = (invsft1 + invsft2*(ROUNDS-1))*count2;<br />
invmix = (invmix1*(ROUNDS-1))*count2;<br />
<br />
decryptTime = invadd + invsub + invsft + invmix;<br />
<br />
cout<<endl;<br />
<br />
cout<<" ----- Average AES Decryption Time for 1 Operation ----- "<<endl<<endl;<br />
<br />
printf("Key Expansion Time : ");<br />
printf("%lf ", keysh_time);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("AddRoundKey Time : ");<br />
printf("%lf ", invadd);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("Inverse SubBytes Time : ");<br />
printf("%lf ", invsub);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("Inverse ShiftRow Time : ");<br />
printf("%lf ", invsft);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("Inverse MixColunms Time : ");<br />
printf("%lf ", invmix);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
printf("Decrytion Time : ");<br />
printf("%lf ", decryptTime);<br />
printf("seconds.");<br />
printf("\n\n");<br />
<br />
cout<<"Number of plaintext blocks of 16 bytes created: "<<count2<<endl;<br />
<br />
printf("\n\n\t\t End of the program\n\n");<br />
<br />
return 0;<br />
}<br />
key.txt:- 0123456789abcdef0123456789abcdef
myfile1.txt:- its the pixels values
Please help me out how to solve this problem
modified on Sunday, February 24, 2008 2:36 PM
|