diff --git a/const.h b/const.h
new file mode 100644
index 0000000..ac2f681
--- /dev/null
+++ b/const.h
@@ -0,0 +1,242 @@
+#ifndef CONST_H
+#define CONST_H
+#include <cstdio>
+#include <stdint.h>
+#define print_long_hex(x) printf(""#x": %016llX\n",(x))
+#define print_hex(x) printf(""#x": %06X\n",(x))
+
+typedef long long ll;
+typedef unsigned long long ull;
+
+ull left32(const ull& num) {
+    return (num >> 32) & ((1ULL << 32) - 1);
+}
+
+ull right32(const ull& num) {
+    return num & ((1ULL << 32) - 1);
+}
+
+ull left28(const ull& num) {
+    return (num >> 28) & ((1ULL << 28) - 1);
+}
+
+ull right28(const ull& num) {
+    return num & ((1ULL << 28) - 1);
+}
+
+ull calcBase(const int* table, int input_size, int output_size, const ull& num) {
+    ull ret = 0;
+    for (int i = 0; i < output_size; i++) {
+        ret <<= 1;
+        ret |= (num >> (input_size - table[i])) & 1ULL;
+    }
+    return ret;
+}
+
+ull calcInvBase(const int* table, int input_size, int output_size, const ull& num) {
+    ull ret = 0;
+    ull cur = num;
+    for (int i = output_size - 1; i >= 0; i--) {
+        ret |= (cur & 1ULL) << (input_size - table[i]);
+        cur >>= 1;
+    }
+    return ret;
+}
+
+const int ip_size = 64;
+const int ip[ip_size] = {
+        58, 50, 42, 34, 26, 18, 10, 2,
+        60, 52, 44, 36, 28, 20, 12, 4,
+        62, 54, 46, 38, 30, 22, 14, 6,
+        64, 56, 48, 40, 32, 24, 16, 8,
+        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
+};
+
+ull calcIp(const ull& num) {
+    return calcBase(ip, ip_size, ip_size, num);
+}
+ull calcInvIp(const ull& num) {
+    return calcInvBase(ip, ip_size, ip_size, num);
+}
+
+
+const int ext_input_size = 32;
+const int ext_output_size = 48;
+const int ext[48] = {
+        32, 1, 2, 3, 4, 5,
+        4, 5, 6, 7, 8, 9,
+        8, 9, 10, 11, 12, 13,
+        12, 13, 14, 15, 16, 17,
+        16, 17, 18, 19, 20, 21,
+        20, 21, 22, 23, 24, 25,
+        24, 25, 26, 27, 28, 29,
+        28, 29, 30, 31, 32, 1
+};
+
+ull calcExt(const ull& num) {
+    calcBase(ext, ext_input_size, ext_output_size, num);
+}
+
+const int sbox_index = 8;
+const int sbox_row = 4;
+const int sbox_col = 16;
+const int sbox_input_size = 1 << 6;
+const int sbox_output_size = 1 << 4;
+
+const int sbox[sbox_index][sbox_row][sbox_col] =
+{
+        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
+};
+
+int calcSingleSbox(const int& index, const int& num) {
+    int row = (num & 1) | ((num & 32) >> 4);
+    int col = (num & 30) >> 1;
+    return sbox[index][row][col];
+}
+
+ull calcSbox(const ull& num) {
+    ull ret = 0;
+    /* S-Box Tables */
+    for (int i = 0; i < 8; i++) {
+        ull row = ((num & (0x0000840000000000 >> (6 * i))) >> (42 - 6 * i));
+        row = (row >> 4) | (row & 0x01);
+        ull col = ((num & (0x0000780000000000 >> (6 * i))) >> (43 - 6 * i));
+        ret <<= 4;
+        ret |= (uint32_t)(sbox[i][row][col] & 0x0f);
+    }
+    return ret;
+}
+
+const int perm_size = 32;
+const int perm_input_size = perm_size;
+const int perm_output_size = perm_size;
+const int perm[perm_size] = {
+        16, 7, 20, 21,
+        29, 12, 28, 17,
+        1, 15, 23, 26,
+        5, 18, 31, 10,
+        2, 8, 24, 14,
+        32, 27, 3, 9,
+        19, 13, 30, 6,
+        22, 11, 4, 25
+};
+
+ull calcPerm(const ull& num) {
+    calcBase(perm, perm_input_size, perm_output_size, num);
+}
+
+ull calcInvPerm(const ull& num) {
+    calcInvBase(perm, perm_input_size, perm_output_size, num);
+}
+
+/* Permuted Choice 1 Table */
+const int pc1_input_size = 64;
+const int pc1_output_size = 56;
+const int pc1[pc1_output_size] = {
+        57, 49, 41, 33, 25, 17, 9,
+        1, 58, 50, 42, 34, 26, 18,
+        10, 2, 59, 51, 43, 35, 27,
+        19, 11, 3, 60, 52, 44, 36,
+        63, 55, 47, 39, 31, 23, 15,
+        7, 62, 54, 46, 38, 30, 22,
+        14, 6, 61, 53, 45, 37, 29,
+        21, 13, 5, 28, 20, 12, 4
+};
+
+ull calcPc1(const ull& num) {
+    return calcBase(pc1, pc1_input_size, pc1_output_size, num);
+}
+
+ull calcInvPc1(const ull& num) {
+    return calcInvBase(pc1, pc1_input_size, pc1_output_size, num);
+}
+
+/* Permuted Choice 2 Table */
+const int pc2_input_size = 56;
+const int pc2_output_size = 48;
+const int pc2[pc2_output_size] = {
+        14, 17, 11, 24, 1, 5,
+        3, 28, 15, 6, 21, 10,
+        23, 19, 12, 4, 26, 8,
+        16, 7, 27, 20, 13, 2,
+        41, 52, 31, 37, 47, 55,
+        30, 40, 51, 45, 33, 48,
+        44, 49, 39, 56, 34, 53,
+        46, 42, 50, 36, 29, 32
+};
+
+ull calcPc2(const ull& num) {
+    return calcBase(pc2, pc2_input_size, pc2_output_size, num);
+}
+
+ull calcInvPc2(const ull& num) {
+    return calcInvBase(pc2, pc2_input_size, pc2_output_size, num);
+}
+
+/* Iteration Shift Array */
+const int iteration_shift[16] = {
+        1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
+};
+
+const int pi_size = 64;
+const int pi[] = {
+        40, 8, 48, 16, 56, 24, 64, 32,
+        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
+};
+
+ull calcPi(const ull& num) {
+    calcBase(pi, pi_size, pi_size, num);
+}
+
+ull calcInvPi(const ull& num) {
+    calcInvBase(pi, pi_size, pi_size, num);
+}
+
+#endif //CONST_H#pragma once