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#include "../crypto.h"
#include <stdio.h>
#include <stdint.h>
struct pjw_hash pjw_init(){
return (struct pjw_hash){.hash = 0, .high = 0};
}
int pjw_free_l(lua_State* L){
return 0;
}
void pjw_update(uint8_t* in, size_t len, struct pjw_hash* hash){
for(int i = 0; i != len; i++){
hash->hash = (hash->hash << 4) + *in++;
if((hash->high = (hash->hash & 0xf0000000)))
hash->hash ^= hash->high >> 24;
hash->hash &= ~hash->high;
}
}
uint32_t pjw_final(struct pjw_hash* hash){
return hash->hash;
}
uint32_t pjw(uint8_t* in, size_t len){
struct pjw_hash a = pjw_init();
pjw_update(in, len, &a);
return pjw_final(&a);
}
common_hash_clone(pjw);
common_hash_init_update(pjw);
int l_pjw_final(lua_State* L){
struct pjw_hash* a = (struct pjw_hash*)lua_touserdata(L, 1);
uint32_t u = pjw_final(a);
char digest[32];
sprintf(digest,"%08x",u);
lua_pushstring(L, digest);
return 1;
}
int l_pjw(lua_State* L){
if(lua_gettop(L) == 0) return l_pjw_init(L);
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
char digest[32];
uint32_t u = pjw(a, len);
sprintf(digest,"%08x",u);
lua_pushstring(L, digest);
return 1;
}
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