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
|
#include "../crypto.h"
#include <stdio.h>
#include <stdint.h>
struct adler32_hash adler32_init(){
return (struct adler32_hash){.a = 1, .b = 0};
}
void adler32_update(uint8_t* aa, size_t len, struct adler32_hash* hash){
for(int i = 0; i != len; i++){
hash->a += aa[i];
hash->b += hash->a;
}
}
uint32_t adler32_final(struct adler32_hash* hash){
return hash->b * 65536 + hash->a;
}
uint32_t adler32(uint8_t* aa, size_t len){
struct adler32_hash dig = adler32_init();
adler32_update(aa, len, &dig);
return adler32_final(&dig);
}
int l_adler32_init(lua_State* L){
struct adler32_hash* a = (struct adler32_hash*)lua_newuserdata(L, sizeof * a);
*a = adler32_init();
return 1;
}
int l_adler32_update(lua_State* L){
struct adler32_hash* a = (struct adler32_hash*)lua_touserdata(L, 1);
size_t len = 0;
uint8_t* b = (uint8_t*)luaL_checklstring(L, 2, &len);
adler32_update(b, len, a);
return 1;
}
int l_adler32_final(lua_State* L){
struct adler32_hash* a = (struct adler32_hash*)lua_touserdata(L, 1);
uint32_t u = adler32_final(a);
char digest[32];
sprintf(digest,"%08x",u);
lua_pushstring(L, digest);
return 1;
}
int l_adler32(lua_State* L){
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
char digest[32];
uint32_t u = adler32(a, len);
sprintf(digest,"%08x",u);
lua_pushstring(L, digest);
return 1;
}
|
