|
|
|
|
|
#ifndef DES6_DES_H
|
|
|
|
|
|
#define DES6_DES_H
|
|
|
|
|
|
#include <iostream>
|
|
|
|
|
|
#include "const.h"
|
|
|
|
|
|
|
|
|
|
|
|
void createSubKey(const ull& key, ull* sub_key) {
|
|
|
|
|
|
ull pc1_out = calcPc1(key);
|
|
|
|
|
|
ull l = left28(pc1_out);
|
|
|
|
|
|
ull r = right28(pc1_out);
|
|
|
|
|
|
for (int i = 0; i < 6; i++) {
|
|
|
|
|
|
for (int j = 0; j < iteration_shift[i]; j++) {
|
|
|
|
|
|
l = (0x0fffffff & (l << 1)) | (0x00000001 & (l >> 27)); // left shift
|
|
|
|
|
|
r = (0x0fffffff & (r << 1)) | (0x00000001 & (r >> 27));
|
|
|
|
|
|
}
|
|
|
|
|
|
ull pc2_in = (l << 28) | r;
|
|
|
|
|
|
ull pc2_out = calcPc2(pc2_in);
|
|
|
|
|
|
sub_key[i] = pc2_out;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
ull pre_l3 = 0;
|
|
|
|
|
|
|
|
|
|
|
|
ull des(const ull& txt, const ull& key, bool encrypt) {
|
|
|
|
|
|
ull ip_out = calcIp(txt); // <20><>ʼ<EFBFBD>û<EFBFBD>
|
|
|
|
|
|
ull l = (ip_out >> 32) & ((1ULL << 32) - 1);
|
|
|
|
|
|
ull r = ip_out & ((1ULL << 32) - 1); // <20>ֳ<EFBFBD><D6B3><EFBFBD><EFBFBD>벿<EFBFBD>ֺ<EFBFBD><D6BA>Ұ벿<D2B0><EBB2BF>
|
|
|
|
|
|
ull sub_key[6];
|
|
|
|
|
|
createSubKey(key, sub_key); // <20><><EFBFBD><EFBFBD>ÿһ<C3BF><D2BB>ʹ<EFBFBD>õ<EFBFBD><C3B5><EFBFBD><EFBFBD><EFBFBD>Կ
|
|
|
|
|
|
for (int i = 0; i < 6; i++) {
|
|
|
|
|
|
ull ext_out = calcExt(r); // <20><>չ
|
|
|
|
|
|
ull sbox_in;
|
|
|
|
|
|
if (encrypt) {
|
|
|
|
|
|
sbox_in = ext_out ^ sub_key[i];
|
|
|
|
|
|
}
|
|
|
|
|
|
else
|
|
|
|
|
|
sbox_in = ext_out ^ sub_key[5 - i];
|
|
|
|
|
|
ull sbox_out = calcSbox(sbox_in); // s<><73>
|
|
|
|
|
|
ull perm_out = calcPerm(sbox_out); // <20>û<EFBFBD>
|
|
|
|
|
|
|
|
|
|
|
|
ull tmp = r;
|
|
|
|
|
|
r = l ^ perm_out;
|
|
|
|
|
|
l = tmp;
|
|
|
|
|
|
|
|
|
|
|
|
if (i == 2) {
|
|
|
|
|
|
pre_l3 ^= (l << 32) | r;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
ull pi_in = l << 32 | r;
|
|
|
|
|
|
ull pi_out = calcPi(pi_in); // ĩ<>û<EFBFBD>
|
|
|
|
|
|
return pi_out;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
ull desEncrypt(const ull& txt, const ull& key) {
|
|
|
|
|
|
return des(txt, key, true);
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
ull desDecrypt(const ull& txt, const ull& key) {
|
|
|
|
|
|
return des(txt, key, false);
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
ull test() {
|
|
|
|
|
|
|
|
|
|
|
|
ull txtA = 14930861438147399743ULL;
|
|
|
|
|
|
ull keyA = 5123802368455698ULL;
|
|
|
|
|
|
ull outA = desEncrypt(txtA, keyA);
|
|
|
|
|
|
|
|
|
|
|
|
ull txtB = 10321427219600805951ULL;
|
|
|
|
|
|
ull outB = desEncrypt(txtB, keyA);
|
|
|
|
|
|
|
|
|
|
|
|
std::cout << outA << std::endl;
|
|
|
|
|
|
std::cout << outB << std::endl;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#endif //DES6_DES_H
|
|
|
|
|
|
#pragma once
|
