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
|
#include "../crypto.h"
#include <stdio.h>
#include <stdint.h>
struct xor8_hash xor8_init(){
return (struct xor8_hash){.a = 0};
}
int xor8_free_l(lua_State* L){
return 0;
}
void xor8_update(uint8_t* aa, size_t len, struct xor8_hash* hash){
for(int i = 0; i != len; i++)
hash->a += aa[i] & 0xff;
}
uint8_t xor8_final(struct xor8_hash* hash){
return ((hash->a ^ 0xff) + 1) & 0xff;
}
uint8_t xor8(uint8_t* aa, size_t len){
struct xor8_hash a = xor8_init();
xor8_update(aa, len, &a);
return xor8_final(&a);
}
common_hash_clone(xor8)
common_hash_init_update(xor8);
int l_xor8_final(lua_State* L){
struct xor8_hash* a = (struct xor8_hash*)lua_touserdata(L, 1);
uint8_t u = xor8_final(a);
char digest[8];
sprintf(digest,"%02x",u);
lua_pushstring(L, digest);
return 1;
}
int l_xor8(lua_State* L){
if(lua_gettop(L) == 0) return l_xor8_init(L);
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
char digest[8];
uint8_t u = xor8(a, len);
sprintf(digest,"%02x",u);
lua_pushstring(L, digest);
return 1;
}
|
