65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/*
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borrowed sha3 implementation from https://keccak.team
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*/
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#ifdef BUILD_PROD
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#include <luajit.h>
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#endif
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#include <lauxlib.h>
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#include <lua.h>
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#include <lualib.h>
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#include "libcrypto.h"
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#include "keccak.h"
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/*
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sha3(data::string)::string
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*/
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int
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lsha3(lua_State *L){
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size_t len;
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unsigned char out[64];
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const unsigned char *data = (const unsigned char*)luaL_checklstring(L,-1,&len);
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lua_pop(L,1);
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printf("All data gotten, about to hash\n");
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FIPS202_SHA3_512(data, len, out);
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printf("Finished hashing\n");
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lua_pushlstring(L,(char*)out,64);
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printf("Finished pushing string to lua\n");
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return 1;
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}
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/*
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string xor
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sxor(a::string, b::string)::string
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*/
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int
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lsxor(lua_State *L){
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size_t la,lb;
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const char *a = luaL_checklstring(L,-1,&la);
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const char *b = luaL_checklstring(L,-2,&lb);
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size_t outsize = la > lb ? la : lb;
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size_t loopsize = la > lb ? lb : la;
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const char *shorter = la > lb ? b : a;
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const char *longer = la > lb ? a : b;
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char out[outsize];
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size_t i;
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for(i = 0; i < loopsize; i++)
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out[i] = shorter[i] ^ longer[i];
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for(;i < outsize; i++)
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out[i] = longer[i];
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lua_pushlstring(L,out,outsize);
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return 1;
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}
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static const luaL_Reg crypto_funcs[] = {
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{"sha3", lsha3},
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{"sxor", lsxor},
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{NULL,NULL}
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};
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void
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load_crypto_libs(lua_State *L){
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lua_getglobal(L,"_G");
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luaL_register(L,NULL,crypto_funcs);
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lua_pop(L,1);
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}
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