linux c crypto
原文链接： linux c crypto
https://gist.github.com/neikeq/d6d00bd24db606dd0b86
#ifndef _DEFINE_H_
#define _DEFINE_H_
#define OK 0
#define NOK -1
#define YES 1
#define NO 0
#define MAX_SERVER 50
#define MAX_PLAYER 500
#define MAX_ROOM 150
#define MAX_TEAM 150
#define MAX_VIEWER 4
#define MAX_ATHLETE 10
#define MAX_ITEM 70
#define MAX_LEVEL 50
#define MAX_LEVEL_SECTION (MAX_LEVEL/5)+1
#define MAX_TIP 50
#define MAX_MISSION 46
#define MAX_HOLIDAY 50
#define MAX_CARDSKILL 3
#define MAX_CARDRANK 4
#define MAX_BUDDY 30
#define MAX_BLACKLIST 30
#define EMBLEM_TYPE_GOLD 604101101
#define EMBLEM_TYPE_SILVER 604101102
#define MAX_PATH 255
#define GAME_PLAY_TIME 300
#define ID_NAME_SIZE (15 * 2) + 1
#define PLAYER_NAME_SIZE (7 * 2) + 1
#define OBJECT_NAME_SIZE (20 * 2) + 1
#define SERVER_NAME_SIZE (15 * 2) + 1
#define TITLE_NAME_SIZE (23 * 2) + 1
#define CLUB_NAME_SIZE (10 * 2) + 1
#define PLAYER_MENT_SIZE (22 * 2) + 1
#define MESSAGE_SIZE (40 * 2) + 1
#define PASS_SIZE (10 * 2) + 1
#define LOGIN_PASS_SIZE (32 * 2) + 1
#define TIP_SIZE (60 * 2) + 1
#define MISSTION_TEXT_SIZE (60 * 2) + 1
#define MAX_MUSIC_COUNT 3
#define MAX_EQUIP 17
#define MAX_FACULTY 130
#define MAX_CHARACTER 3
#define MAX_INVEN 80
#define MAX_SKILL 50
#define MAX_CEREMONY 5
#define MAX_CARD 100
#define MAX_SCHEDULE_LIST 10
#define MAX_BUDDY_LIST 10
#define MAX_ITEM_LIST 10
#define MAX_ITEM_LIST 10
#define MAX_TRAINING_LIST 10
#define MAX_CEREMONEY_LIST 5
#define MAX_SKILL_LIST 50
#define MAX_QUEST_LIST 10
#define MAX_CARD_LIST 30
#define PACKET_SIZE 2048
#define HEAD_SIZE (int)sizeof(Header)
#define IP_SIZE 20
#define TEAM_SIZE 6
#define ITEM_OPTION_SIZE 5
#define SLOT_SIZE 4
#define BASE_CHARACTER_SIZE 1
#define BASE_INVEN_SIZE 20
#define BASE_SKILL_SIZE 8
#define ITEM1_MIX_SIZE 5
#define ITEM2_MIX_SIZE 5
#define CARD_MIX_SIZE 12
#define LIST5_SIZE 5
#define LIST6_SIZE 6
#define LIST8_SIZE 8
#define LIST10_SIZE 10
#define TEAM_SIZE 6
#define SHOP_BIT_EXIST 0
#define SHOP_BIT_NONE 1
#define ITEM_FACE 100
#define ITEM_HAIR 101
#define ITEM_SHIRTS 102
#define ITEM_PANTS 103
#define ITEM_GLOVE 104
#define ITEM_SHOES 105
#define ITEM_DIGIT 1000000
#define OPTION_DIGIT 100000
#define POSITION_NONE 0
#define POSITION_ALL 1
#define POSITION_FW 10
#define POSITION_ST 11
#define POSITION_CF 12
#define POSITION_WF 13
#define POSITION_SS 14
#define POSITION_FW_RANGE 4
#define POSITION_MF 20
#define POSITION_AM 21
#define POSITION_CM 22
#define POSITION_SM 23
#define POSITION_DM 24
#define POSITION_MF_RANGE 4
#define POSITION_DF 30
#define POSITION_SW 31
#define POSITION_CB 32
#define POSITION_SB 33
#define POSITION_DF_RANGE 3
#define POSITION_GK 40
#define POSITION_BG 50
#define AUTO_FACULTY_LEVEL1 10
#define AUTO_FACULTY_LEVEL2 20
#define MAX_AI_COSTUME 61
#define PC_EXIT01 1
#define PC_EXIT02 2
#define PC_EXIT03 3
#define PC_EXIT04 4
#define PC_EXIT11 11
#define PC_EXIT12 12
#define PC_EXIT20 20
#define PC_EXIT21 21
#define PC_EXIT22 22
#define PC_EXIT30 30
#define PC_EXIT31 31
#define PC_EXIT32 32
#define PC_EXIT33 33
#define PC_EXIT90 90
#define ROOT2 1.414
#define PROTOCOL_MAGIC (('O'<<24)+('G'<<16)+('R'<<8)+'E')
#define MAIN 100
#define AAA 200
#define BBB 300
#endif
crypto.h
#ifndef SECURE_H_
#define SECURE_H_
#include "struct_types.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define MAX_SECURE_SEQ 65535
char SECURE_ARRAY[130] =
{
'C', 'a', 'r', 'p', 'e', 'd', 'i', 'e', 'm', 'S',
'e', 'i', 'z', 'e', 'T', 'h', 'e', 'D', 'a', 'y',
'B', 'o', 'y', 's', 'M', 'a', 'k', 'e', 'Y', 'o',
'u', 'r', 'L', 'i', 'v', 'e', 's', 'E', 'x', 't',
'r', 'a', 'o', 'd', 'i', 'n', 'a', 'r', 'y', 'W',
'O', 'r', 'k', 'H', 'a', 'r', 'd', '!', 'H', 'a',
'v', 'e', 'F', 'u', 'n', '!', 'M', 'a', 'k', 'e',
'H', 'i', 's', 't', 'o', 'r', 'y', '!', 'B', 'e',
'T', 'h', 'e', 'C', 'h', 'a', 'n', 'g', 'e', 'Y',
'o', 'u', 'W', 'a', 'n', 'n', 'a', 'S', 'e', 'e',
'I', 'n', 'T', 'h', 'e', 'W', 'o', 'r', 'l', 'd',
'B', 'y', ' ', 'M', 'u', 't', 't', 'e', 'r', ' ',
'2', '0', '0', '9', '.', '0', '7', '@', '!', '#'
};
int send_seq;
int recv_seq;
int encrypt(char* buf, int len);
int decrypt(char* buf, int len);
int make_key(int* seq);
int make_send_seq();
int make_recv_seq();
int init_seq();
int init_seq(int seq);
int make_send_packet(HeadPacket* packet);
int make_recv_packet(HeadPacket* packet);
#endif
crypto.c
#include "crypto.h"
int init_seq()
{
time_t t; time(&t);
srand((int)t);
int nSeed = rand() % MAX_SECURE_SEQ;
init_seq(nSeed);
return nSeed;
}
int init_seq(int seq)
{
recv_seq = seq;
send_seq = seq;
return seq;
}
int make_key(int* seq)
{
(*seq)++;
if (*seq > MAX_SECURE_SEQ)*seq = 0;
int nArray1 = (*seq) % 128;
int nArray2 = (*seq/127) % 128;
int nResult = ((*seq) ^ (SECURE_ARRAY[nArray1] * SECURE_ARRAY[nArray2]));
return nResult;
}
int make_send_seq()
{
return make_key(&send_seq);
}
int make_recv_seq()
{
return make_key(&recv_seq);
}
void make_send_packet(HeadPacket* packet)
{
if (packet == NULL) return -1;
char* buf = (char*)packet;
int sendSeq = make_send_seq();
packet->mSequence = sendSeq;
encrypt(&buf[HEAD_SIZE], packet->mBodySize);
}
void make_recv_packet(HeadPacket* packet)
{
if (packet == NULL) return -1;
char* buf = (char*)packet;
int recvSeq = make_recv_seq();
if (packet->mSequence != recvSeq) return -2;
decrypt(&buf[HEAD_SIZE], packet->mBodySize);
}
void encrypt(char* buf, int len)
{
int nArray1 = send_seq % 128;
int nArray2 = (send_seq / 127) % 128;
if (nArray1 == nArray2) nArray2++;
int i = 0;
for (i = 0; i < len; i++)
{
buf[i] = buf[i] ^ SECURE_ARRAY[nArray1];
buf[i] = buf[i] ^ SECURE_ARRAY[nArray2];
nArray1++; if (nArray1 > 127) nArray1 = 0;
nArray2++; if (nArray2 > 127) nArray2 = 0;
}
}
void decrypt(char* buf, int len)
{
int nArray1 = recv_seq % 128;
int nArray2 = (recv_seq / 127) % 128;
if (nArray1 == nArray2) nArray2++;
int i = 0;
for (i = 0; i < len; i++)
{
buf[i] = buf[i] ^ SECURE_ARRAY[nArray2];
buf[i] = buf[i] ^ SECURE_ARRAY[nArray1];
nArray1++; if (nArray1 > 127) nArray1 = 0;
nArray2++; if (nArray2 > 127) nArray2 = 0;
}
}