blob: 465249eb6c16a1d8361bd9c2cda6de6b9c6cf7e4 (
plain)
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
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
#include <global_types.h>
#include <string.h>
#include "pso/macros.h"
#include "pso/PSOV3Encryption.h"
#include "pso/TArray.h"
u32 PSOV3Encryption::next() {
if (++m_buffer_start == m_buffer_end) {
update_stream();
}
return *m_buffer_start;
}
void PSOV3Encryption::update_stream() {
u32 *ptr;
u32 *first_end;
u32 *start;
start = m_buffer.start();
m_buffer_start = m_buffer.start();
for (ptr = m_buffer.start(), first_end = &ptr[489]; first_end != m_buffer_end;) {
*ptr++ ^= *first_end++;
}
for (u32 *p = ptr; p != m_buffer_end; *p++ ^= *start++);
}
void PSOV3Encryption::encrypt(u32 seed) {
const size_t size = m_buffer.size();
u32 thing;
m_buffer_end = &m_buffer[size];
m_buffer_start = m_buffer.start();
u32 value = 0;
for (int i = 0; i <= 16; ++i, *m_buffer_start++ = value) {
for (int j = 32; j; --j) {
seed *= 0x5d588b65;
value = (++seed & (1 << 31)) | (value >> 1);
}
}
--m_buffer_start;
thing = m_buffer[0xf];
*m_buffer_start = (m_buffer[0] >> 9) ^ (*m_buffer_start << 23) ^ thing;
for (u32 *buf_val = &m_buffer[0], *next_buf_val = &m_buffer[1], *buf = m_buffer_start++; m_buffer_start != m_buffer_end;) {
*m_buffer_start++ = (*buf_val++ << 23) ^ (*next_buf_val++ >> 9) ^ *buf++;
}
update_stream();
update_stream();
update_stream();
m_buffer_start = m_buffer.end();
}
PSOV3Encryption::~PSOV3Encryption() {
m_buffer.fill(0);
m_buffer_start = nullptr;
m_buffer_end = nullptr;
}
PSOV3Encryption::PSOV3Encryption() : PSOEncryption() {
encrypt(0);
}
PSOEncryption::~PSOEncryption() {
}
PSOEncryption::PSOEncryption() {
}
|
