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Добрый день! =)) С блоками разобрались (Использовала 64 и 32 битные целые, оказывается в С++ они определены  )))... алгоритмы реализованы... вроде все правильно, алгоритм шифрует, получает значение... Это значение потом дешифруется тем же алгоритмом, но ключи применяются в обратном порядке... по всей логике вещей результат должен совпасть с исходным значением, чего, увы, по каким-то прчинам не происходит... Как отлаживать такие алгоритмы (работающие на битовом уровне) я не знаю. Неужели нужно отслеживать каждый нолик или единицу???  а может я неправильно применила какую-нибудь побитовую операцию (^, |, &)??? далее моя реализация 1)DES и 2)ГОСТ. | Код |
// kurs_test_des_1_(e).cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
using namespace std;
typedef unsigned long long UINT_64;
typedef unsigned long UINT_32;
template <class T>
T MakePermutation (T block, const int * perm, int perm_sz)
{
T Res = 0;
for (int i = 0; i < perm_sz; i++)
{
Res |= ((block >> perm[i]) & 1) << i;
}
return Res;
}
const int IP[64] = {6, 14, 22, 30, 38, 46, 54, 62,
4, 12, 20, 28, 36, 44, 52, 60,
2, 10, 18, 26, 34, 42, 50, 58,
0, 8, 16, 24, 32, 40, 48, 56,
7, 15, 23, 31, 39, 47, 55, 63,
5, 13, 21, 29, 37, 45, 53, 61,
3, 11, 19, 27, 35, 43, 51, 59,
1, 9, 17, 25, 33, 41, 49, 57};
/*{57, 49, 41, 33, 25, 17, 9, 1,
59, 51, 43, 35, 27, 19, 11, 3,
61, 53, 45, 37, 29, 21, 13, 5,
63, 55, 47, 39, 31, 23, 15, 7,
56, 48, 40, 32, 24, 16, 8, 0,
58, 50, 42, 34, 26, 18, 10, 2,
60, 52, 44, 36, 28, 20, 12, 4,
62, 54, 46, 38, 30, 22, 14, 6};*/
const int IP_rev[64] = {24, 56, 16, 48, 8, 40, 0, 32,
25, 57, 17, 49, 9, 41, 1, 33,
26, 58, 18, 50, 10, 42, 2, 34,
27, 59, 19, 51, 11, 43, 3, 35,
28, 60, 20, 52, 12, 44, 4, 36,
29, 61, 21, 53, 13, 45, 5, 37,
30, 62, 22, 54, 14, 46, 6, 38,
31, 63, 23, 55, 15, 47, 7, 39};
/*{39, 7, 47, 15, 55, 23, 63, 31,
38, 6, 46, 14, 54, 22, 62, 30,
37, 5, 45, 13, 53, 21, 61, 29,
36, 4, 44, 12, 52, 20, 60, 28,
35, 3, 43, 11, 51, 19, 59, 27,
34, 2, 42, 10, 50, 18, 58, 26,
33, 1, 41, 9, 49, 17, 57, 25,
32, 0, 40, 8, 48, 16, 56, 24 };*/
const int E[48] = {0, 31, 30, 29, 28, 27,
28, 27, 26, 25, 24, 23,
24, 23, 22, 21, 20, 19,
20, 19, 18, 17, 16, 15,
16, 15, 14, 13, 12, 11,
12, 11, 10, 9, 8, 7,
8, 7, 6, 5, 4, 3,
4, 3, 2, 1, 0, 31};
/*{31, 0, 1, 2, 3, 4,
3, 4, 5, 6, 7, 8,
7, 8, 9, 10, 11, 12,
11, 12, 13, 14, 15, 16,
15, 16, 17, 18, 19, 20,
19, 20, 21, 22, 23, 24,
23, 24, 25, 26, 27, 28,
27, 28, 29, 30, 31, 0 };*/
const UINT_32 S[8][4][16] =
{{{14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7},
{0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8},
{4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0},
{15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13}},
{{15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10},
{3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5},
{0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15},
{13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9}},
{{10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8},
{13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1},
{13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7},
{1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12}},
{{7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15},
{13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9},
{10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4},
{3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14}},
{{2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9},
{14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6},
{4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14},
{11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3}},
{{12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11},
{10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8},
{9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6},
{4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13}},
{{4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1},
{13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6},
{1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2},
{6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12}},
{{13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7},
{1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2},
{7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8},
{2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11}}
};
const int P[32] = {16, 25, 12, 11, 3, 20, 4, 15,
31, 17, 9, 6, 27, 14, 1, 22,
30, 24, 8, 18, 0, 5, 29, 23,
13, 19, 2, 26, 10, 21, 28, 7};
/*{15, 26, 19, 20, 28, 11, 27, 16,
0, 14, 22, 25, 4, 17, 30, 9,
1, 7, 23, 13, 31, 26, 2, 8,
18, 12, 29, 5, 21, 10, 3, 26};*/
const int CP1[56] =
{7, 15, 23, 31, 39, 47, 55,
63, 6, 14, 22, 30, 38, 46,
54, 62, 5, 13, 21, 29, 37,
45, 53, 61, 4, 12, 20, 28,
1, 9, 17, 25, 33, 41, 49,
57, 2, 10, 18, 26, 34, 42,
50, 58, 3, 11, 19, 27, 35,
43, 51, 59, 36, 44, 52, 60};
/*{56, 48, 40, 32, 24, 16, 8,
0, 57, 49, 41, 33, 25, 17,
9, 1, 58, 50, 42, 34, 26,
18, 10, 2, 59, 51, 43, 35,
62, 54, 46, 38, 30, 22, 14,
6, 61, 53, 45, 37, 29, 21,
13, 45, 60, 52, 42, 36, 28,
20, 12, 24, 27, 19, 11, 3}; */
const int CP2[56] =
{42, 39, 45, 32, 55, 51,
53, 28, 41, 50, 35, 46,
33, 37, 44, 52, 30, 48,
40, 49, 29, 36, 43, 54,
15, 4, 25, 19, 9, 1,
26, 16, 5, 11, 23, 8,
12, 7, 17, 0, 22, 3,
10, 14, 6, 20, 27, 24};
/*{13, 16, 10, 23, 0, 4,
2, 27, 14, 5, 20, 9,
22, 18, 11, 3, 25, 7,
14, 5, 25, 18, 11, 0,
40, 51, 30, 36, 46, 54,
29, 39, 50, 46, 32, 47,
43, 48, 38, 55, 33, 52,
45, 41, 49, 35, 28, 31}; */
const int R[16] = {1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1};
UINT_64 * make_keys(UINT_64 key)
{
UINT_64 r_key[16];
MakePermutation<UINT_64> (key, CP1, 56);
UINT_32 low = key << 4;
UINT_32 hi = key >> 36;
UINT_32 C, D;
C = hi; D = low;
for (int i = 0; i < 16; i++)
{
C << R[i];
D << R[i];
r_key[i] = (UINT_64(hi) << 32) | UINT_64(low);
MakePermutation<UINT_64>(r_key[i], CP2, 56);
}
return r_key;
}
UINT_32 RoundEncrypt(UINT_32 b, UINT_64 key)
{
UINT_64 bb = MakePermutation<UINT_64> (b, E, 48) ^ key;
UINT_32 bits6, row, col, val, Res;
Res = 0;
for (int i = 0; i < 8; i++)
{
bits6 = bb >> (6*(7-i)) & 31; //111111 (2)
row = ((bits6 >> 5) << 1) | (bits6 & 1);
col = (bits6 >> 1) & 15; // 1111 (2)
val = S[i][row][col];
Res |= val << (4*(7-i));
}
return MakePermutation<UINT_32> (Res, P, 32);
}
UINT_64 des_encrypt(UINT_64 block, UINT_64 Key)
{
UINT_64 * round_key = new UINT_64[16];
round_key = make_keys(Key); //!!!!!!!!!!!
block = MakePermutation<UINT_64>(block, IP, 64);
UINT_32 low_prev = block;
UINT_32 hi_prev = block >> 32;
UINT_32 low, hi;
for (int i = 0; i < 16; i++)
{
hi = low_prev;
low = hi_prev ^ RoundEncrypt(low_prev, round_key[i]);
hi_prev = hi;
low_prev = low;
}
UINT_64 res = (UINT_64(hi) << 32) | UINT_64(low);
return MakePermutation<UINT_64>(res, IP_rev, 64);
}
//**********************************************************************
UINT_64 des_decrypt(UINT_64 block, UINT_64 Key)
{
UINT_64 * round_key = new UINT_64[16];
round_key = make_keys(Key); //!!!!!!!!!!!
block = MakePermutation<UINT_64>(block, IP, 64);
UINT_32 low_prev = block;
UINT_32 hi_prev = block >> 32;
UINT_32 low, hi;
for (int i = 16; i > 0; i--)
{
hi = low_prev;
low = hi_prev ^ RoundEncrypt(low_prev, round_key[i]);
hi_prev = hi;
low_prev = low;
}
UINT_64 res = (UINT_64(hi) << 32) | UINT_64(low);
return MakePermutation<UINT_64>(res, IP_rev, 64);
}
//**********************************************************************
int _tmain(int argc, _TCHAR* argv[])
{
UINT_64 BLOCK(12345678912345678912), KEY(654846774845), REZULT(0), REZULT1(0);
cout << BLOCK << endl << KEY << endl;
REZULT = des_encrypt(BLOCK, KEY);
cout << REZULT << endl;
REZULT1 = des_decrypt(REZULT, KEY);
cout << REZULT1 << endl;
return 0;
}
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| Код |
// kurs_test_gost_1_(e).cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
using namespace std;
typedef unsigned long long UINT_64;
typedef unsigned long UINT_32;
template <class T>
T MakePermutation (T block, const int * perm, int perm_sz)
{
T Res = 0;
for (int i = 0; i < perm_sz; i++)
{
Res |= ((block >> perm[i]) & 1) << i;
}
return Res;
}
const UINT_32 S[8][16] = {{4, 10, 9, 2, 13, 8, 0, 14, 6, 11, 1, 12, 7, 15, 5, 3},
{14, 11, 4, 12, 6, 13, 15, 10, 2, 3, 8, 1, 0, 7, 5, 9},
{5, 8, 1, 13, 10, 3, 4, 2, 14, 15, 12, 7, 6, 0, 9, 11},
{7, 13, 10, 1, 0, 8, 9, 15, 14, 4, 6, 12, 11, 2, 5, 3},
{6, 12, 7, 1, 5, 15, 13, 8, 4, 10, 9, 14, 0, 3, 11, 2},
{4, 11, 10, 0, 7, 2, 1, 13, 3, 6, 8, 5, 9, 12, 15, 14},
{13, 11, 4, 1, 3, 15, 5, 9, 0, 10, 14, 7, 6, 8, 2, 12},
{1, 15, 13, 0, 5, 7, 10, 4, 9, 2, 3, 14, 6, 11, 8, 12}};
UINT_32 RoundEncrypt(UINT_32 b, UINT_32 k)
{
b = UINT_32((UINT_64(b) + (UINT_64(k)) % (UINT_64(1) << 32)));
UINT_32 bits4, row, col, res, val;
res = 0;
for (int i = 0; i < 8; i++)
{
bits4 = b >> (4*(7-i)) & 15;
row = i;
col = bits4;
val = S[row][col];
res |= val << (4*(7-i));
}
return res;
}
UINT_64 gost_encrypt(UINT_64 block, UINT_32 * round_key)
{
UINT_32 low_prev = block;
UINT_32 hi_prev = block >> 32;
UINT_32 hi, low;
for (int i = 1; i <= 32; i++)
{
hi = low_prev;
if (i <= 32) low = hi ^ RoundEncrypt(low_prev, round_key[(i-1)%8]);
else
if (i <= 31) low = hi ^ RoundEncrypt(low_prev, round_key[32-i]);
else
if (i == 32) low = hi ^ RoundEncrypt(low_prev, round_key[0]);
hi_prev = hi;
low_prev = low;
}
UINT_64 res = (UINT_64(hi) << 32)| (UINT_64(low));
return (res << 11);
}
//**********************************************************************
UINT_64 gost_decrypt(UINT_64 block, UINT_32 * round_key)
{
UINT_32 low_prev = block;
UINT_32 hi_prev = block >> 32;
UINT_32 hi, low;
for (int i = 1; i <= 8; i++)
{
hi = low_prev;
if (i <= 32) low = hi ^ RoundEncrypt(low_prev, round_key[(i-1)%8]);
else
if (i <= 31) low = hi ^ RoundEncrypt(low_prev, round_key[32-i]);
else
if (i == 32) low = hi ^ RoundEncrypt(low_prev, round_key[0]);
hi_prev = hi;
low_prev = low;
}
for (int i = 32; i >= 1; i--)
{
hi = low_prev;
if (i <= 32) low = hi ^ RoundEncrypt(low_prev, round_key[(i-1)%8]);
else
if (i <= 31) low = hi ^ RoundEncrypt(low_prev, round_key[32-i]);
else
if (i == 32) low = hi ^ RoundEncrypt(low_prev, round_key[0]);
hi_prev = hi;
low_prev = low;
}
UINT_64 res = (UINT_64(hi) << 32)| (UINT_64(low));
return (res << 11);
}
//**********************************************************************
int _tmain(int argc, _TCHAR* argv[])
{
UINT_64 BLOCK(11111111111111111111), REZULT(0), REZULT1(0);
UINT_32 * KEY = new UINT_32[8];
for (int i = 0; i < 8; i++) KEY[i] = UINT_32(i*i);
cout << BLOCK << endl;
for (int i = 0; i < 8; i++) cout << KEY[i] << " ";
cout << endl;
REZULT = gost_encrypt(BLOCK, KEY);
cout << REZULT << endl;
REZULT1 = gost_decrypt(REZULT, KEY);
cout << REZULT1 << endl;
return 0;
}
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через 3 дня мне ее уже сдавать...  |
[C++]Алгоритмы шифрования DES, 3DES и ГОСТ, реализация на С++ 
Как, в каком виде представить эти 64 бита, чтобы было удомно реализовывать раунды алгоритма? Завести структуру как новый тип данных? Битовое поле, обьединение??? 
Загрузка ...
