blob: 69386dd2c22d18532b018508420d897979cf7cd8 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
// license:BSD-3-Clause
// copyright-holders:Andreas Naive,David Haywood
#ifndef _IGS036CRYPT_H_
#define _IGS036CRYPT_H_
class igs036_decryptor
{
public:
igs036_decryptor(const uint8_t* game_key);
void decrypter_rom(memory_region* region);
uint16_t decrypt(uint16_t cipherword, int word_address)const;
uint16_t deobfuscate(uint16_t cipherword, int word_address)const;
private:
const uint8_t* key;
static int (*rot_enabling[16][4])(int);
static int (*rot_direction[4][8])(int);
static const uint32_t triggers[16][2];
int rotation(int address)const;
uint16_t rol(uint16_t num, int shift)const;
int rot_enabled(int address, const int* group)const ;
int rot_group(int address, const int* group)const;
};
extern const uint8_t m312cn_key[0x100];
extern const uint8_t cjddzsp_key[0x100];
extern const uint8_t cjdh2_key[0x100];
extern const uint8_t kov3_key[0x100];
extern const uint8_t ddpdoj_key[0x100];
#endif
|