180 lines
6.8 KiB
C
180 lines
6.8 KiB
C
#include <Windows.h>
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#include <stdlib.h>
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#include "des.h"
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static BYTE IP[] = {
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58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54, 46, 38, 30, 22,
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14, 6, 64, 56, 48, 40, 32, 24, 16, 8, 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35,
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27, 19, 11, 3, 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7,
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};
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static BYTE PI[] = {
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40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31, 38, 6, 46, 14, 54, 22,
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62, 30, 37, 5, 45, 13, 53, 21, 61, 29, 36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11,
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51, 19, 59, 27, 34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25,
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};
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static BYTE E[] = {
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32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9, 8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17,
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16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25, 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1,
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};
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static BYTE P[] = {
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16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
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2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25,
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};
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static BYTE SBOX[8][64] = {
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{
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14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7, 0, 15, 7, 4, 14, 2,
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13, 1, 10, 6, 12, 11, 9, 5, 3, 8, 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7,
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3, 10, 5, 0, 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13,
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},
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{
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15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10, 3, 13, 4, 7, 15, 2,
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8, 14, 12, 0, 1, 10, 6, 9, 11, 5, 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6,
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9, 3, 2, 15, 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9,
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},
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{
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10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8, 13, 7, 0, 9, 3, 4,
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6, 10, 2, 8, 5, 14, 12, 11, 15, 1, 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12,
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5, 10, 14, 7, 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12,
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},
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{
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7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15, 13, 8, 11, 5, 6, 15,
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0, 3, 4, 7, 2, 12, 1, 10, 14, 9, 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14,
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5, 2, 8, 4, 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14,
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},
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{
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2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9, 14, 11, 2, 12, 4, 7,
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13, 1, 5, 0, 15, 10, 3, 9, 8, 6, 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5,
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6, 3, 0, 14, 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3,
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},
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{
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12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11, 10, 15, 4, 2, 7, 12,
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9, 5, 6, 1, 13, 14, 0, 11, 3, 8, 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10,
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1, 13, 11, 6, 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13,
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},
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{
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4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1, 13, 0, 11, 7, 4, 9,
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1, 10, 14, 3, 5, 12, 2, 15, 8, 6, 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8,
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0, 5, 9, 2, 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12,
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},
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{
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13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7, 1, 15, 13, 8, 10, 3,
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7, 4, 12, 5, 6, 11, 0, 14, 9, 2, 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13,
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15, 3, 5, 8, 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11,
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},
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};
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static BYTE PC1[] = {
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57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
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10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
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63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
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14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4,
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};
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static BYTE PC2[] = {
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14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10, 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
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41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48, 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32,
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};
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static BYTE ITERATION_SHIFT[] = { 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 };
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#define DesModeDecrypt 0
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#define DesModeEncrypt 1
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DWORD64 MiceDesCrypt(DWORD64 nData, DWORD64 nKey, BYTE mode) {
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nData = _byteswap_uint64(nData);
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nKey = _byteswap_uint64(nKey);
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DWORD64 init_perm_res = 0;
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for (int i = 0; i < 64; i++) {
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init_perm_res <<= 1;
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init_perm_res |= (nData >> (64 - IP[i])) & 1;
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}
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DWORD L = (DWORD)(init_perm_res >> 32) & 0xffffffff;
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DWORD R = (DWORD)init_perm_res & 0xffffffff;
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DWORD64 permuted_choice_1 = 0;
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for (int i = 0; i < 56; i++) {
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permuted_choice_1 <<= 1;
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permuted_choice_1 |= (nKey >> (64 - PC1[i])) & 1;
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}
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DWORD C = (DWORD)((permuted_choice_1 >> 28) & 0x0fffffff);
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DWORD D = (DWORD)(permuted_choice_1 & 0x0fffffff);
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DWORD64 sub_key[16] = { 0 };
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for (int i = 0; i < 16; i++) {
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for (int j = 0; j < ITERATION_SHIFT[i]; j++) {
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C = 0x0fffffff & (C << 1) | 1 & (C >> 27);
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D = 0x0fffffff & (D << 1) | 1 & (D >> 27);
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}
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DWORD64 permuted_choice_2 = (((DWORD64)C) << 28) | (DWORD64)D;
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sub_key[i] = 0;
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for (int j = 0; j < 48; j++) {
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sub_key[i] <<= 1;
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sub_key[i] |= (permuted_choice_2 >> (56 - PC2[j])) & 1;
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}
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}
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for (int i = 0; i < 16; i++) {
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DWORD64 s_input = 0;
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for (int j = 0; j < 48; j++) {
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s_input <<= 1;
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s_input |= (DWORD64)((R >> (32 - E[j])) & 1);
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}
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s_input ^= sub_key[mode == DesModeDecrypt ? 15 - i : i];
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DWORD s_output = 0;
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for (int j = 0; j < 8; j++) {
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BYTE row = (BYTE)((s_input & (0x0000840000000000 >> (6 * j))) >> (42 - 6 * j));
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row = (row >> 4) | row & 0x01;
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BYTE column = (BYTE)((s_input & (0x0000780000000000 >> (6 * j))) >> (43 - 6 * j));
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s_output <<= 4;
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s_output |= (DWORD)(SBOX[j][16 * row + column] & 0x0f);
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}
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DWORD f_function_res = 0;
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for (int j = 0; j < 32; j++) {
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f_function_res <<= 1;
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f_function_res |= (s_output >> (32 - P[j])) & 1;
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}
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DWORD temp = R;
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R = L ^ f_function_res;
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L = temp;
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}
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DWORD64 pre = (((DWORD64)R) << 32) | (DWORD64)L;
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DWORD64 result = 0;
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for (int i = 0; i < 64; i++) {
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result <<= 1;
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result |= (pre >> (64 - PI[i])) & 1;
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}
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return _byteswap_uint64(result);
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}
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DWORD64 MiceDesEncrypt(DWORD64 nData, DWORD64 nKey) {
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return MiceDesCrypt(nData, nKey, DesModeEncrypt);
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}
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DWORD64 MiceDesDecrypt(DWORD64 nData, DWORD64 nKey) {
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return MiceDesCrypt(nData, nKey, DesModeDecrypt);
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}
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DWORD64 Mice3Des_3K(DWORD64 nData, DWORD64 lpKeys[3]) {
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nData = MiceDesEncrypt(nData, lpKeys[0]);
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nData = MiceDesDecrypt(nData, lpKeys[1]);
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return MiceDesEncrypt(nData, lpKeys[2]);
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}
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DWORD64 Mice3Des_2K(DWORD64 nData, DWORD64 lpKeys[2]) {
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nData = MiceDesEncrypt(nData, lpKeys[0]);
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nData = MiceDesDecrypt(nData, lpKeys[1]);
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return MiceDesEncrypt(nData, lpKeys[0]);
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}
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DWORD64 Mice3Des_1K(DWORD64 nData, DWORD64 nKey) {
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nData = MiceDesEncrypt(nData, nKey);
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nData = MiceDesDecrypt(nData, nKey);
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return MiceDesEncrypt(nData, nKey);
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}
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