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#include "../crypto.h"
#include <stdio.h>
#include <stdint.h>
struct xor8_hash xor8_init(){
return (struct xor8_hash){.a = 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_init_update(xor8);
int l_xor8_final(lua_State* L){
lua_pushstring(L, "ud");
lua_gettable(L, 1);
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;
}
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