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#include "../crypto.h"
#include <stdio.h>
#include <stdint.h>
struct djb2_hash djb2_init(){
return (struct djb2_hash){.hash = 5381};
}
void djb2_update(uint8_t * in, size_t len, struct djb2_hash * hash){
for(int i = 0; i != len; i++){
hash->hash = ((hash->hash << 5) + hash->hash) + (uint32_t)*in;
in++;
}
}
uint32_t djb2_final(struct djb2_hash * hash){
return hash->hash;
}
uint32_t djb2(uint8_t * in, size_t len){
struct djb2_hash a = djb2_init();
djb2_update(in, len, &a);
return djb2_final(&a);
}
common_hash_init_update(djb2);
int l_djb2_final(lua_State* L){
struct djb2_hash* a = (struct djb2_hash*)lua_touserdata(L, 1);
uint32_t u = djb2_final(a);
char digest[64];
sprintf(digest,"%08x",u);
lua_pushstring(L, digest);
return 1;
}
int l_djb2(lua_State* L){
if(lua_gettop(L) == 0) return l_djb2_init(L);
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
char digest[64];
uint32_t u = djb2(a, len);
sprintf(digest,"%08x",u);
lua_pushstring(L, digest);
return 1;
}
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