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typedef struct
{
int hash;
hash_state state;
} lcrypt_hash;
static int lcrypt_hash_add(lua_State *L)
{
lcrypt_hash *h = luaL_checkudata(L, 1, "LCRYPT_HASH_STATE");
if(likely(h->hash >= 0))
{
size_t in_length = 0;
const unsigned char *in = (const unsigned char*)luaL_checklstring(L, 2, &in_length);
lcrypt_error(L, hash_descriptor[h->hash].process(&h->state, in, (unsigned long)in_length), NULL);
}
return 0;
}
static int lcrypt_hash_done(lua_State *L)
{
lcrypt_hash *h = luaL_checkudata(L, 1, "LCRYPT_HASH_STATE");
if(likely(h->hash >= 0))
{
unsigned char * out = (unsigned char *)alloca(hash_descriptor[h->hash].hashsize);
lcrypt_error(L, hash_descriptor[h->hash].done(&h->state, out), NULL);
lua_pushlstring(L, (char*)out, hash_descriptor[h->hash].hashsize);
}
memset(h, 0, sizeof(lcrypt_hash));
h->hash = -1;
return 1;
}
static int lcrypt_hash_state_gc(lua_State *L)
{
lcrypt_hash *h = luaL_checkudata(L, 1, "LCRYPT_HASH_STATE");
if(likely(h->hash >= 0))
{
unsigned char * out = (unsigned char *)alloca(hash_descriptor[h->hash].hashsize);
lcrypt_error(L, hash_descriptor[h->hash].done(&h->state, out), NULL);
memset(h, 0, sizeof(lcrypt_hash));
h->hash = -1;
}
return 0;
}
static int lcrypt_hash_hash(lua_State *L)
{
int *hash = luaL_checkudata(L, 1, "LCRYPT_HASH");
size_t in_length = 0;
const unsigned char *in = (const unsigned char*)luaL_optlstring(L, 2, "", &in_length);
lcrypt_hash *h = lua_newuserdata(L, sizeof(lcrypt_hash));
luaL_getmetatable(L, "LCRYPT_HASH_STATE");
(void)lua_setmetatable(L, -2);
h->hash = -1;
lcrypt_error(L, hash_descriptor[*hash].init(&h->state), NULL);
if(in_length > 0)
{
lcrypt_error(L, hash_descriptor[*hash].process(&h->state, in, (unsigned long)in_length), NULL);
}
h->hash = *hash;
return 1;
}
static int lcrypt_hash_hmac(lua_State *L)
{
int *hash = luaL_checkudata(L, 1, "LCRYPT_HASH");
size_t key_length = 0, in_length = 0;
const unsigned char *key = (const unsigned char*)luaL_checklstring(L, 2, &key_length);
const unsigned char *in = (const unsigned char*)luaL_optlstring(L, 3, "", &in_length);
hmac_state *h = lua_newuserdata(L, sizeof(hmac_state));
luaL_getmetatable(L, "LCRYPT_HMAC_STATE");
(void)lua_setmetatable(L, -2);
lcrypt_error(L, hmac_init(h, *hash, key, key_length), NULL);
if(in_length > 0)
{
lcrypt_error(L, hmac_process(h, in, (unsigned long)in_length), NULL);
}
return 1;
}
static int lcrypt_hmac_add(lua_State *L)
{
hmac_state *h = luaL_checkudata(L, 1, "LCRYPT_HMAC_STATE");
if(likely(h->hash >= 0))
{
size_t in_length = 0;
const unsigned char *in = (const unsigned char*)luaL_checklstring(L, 2, &in_length);
lcrypt_error(L, hmac_process(h, in, (unsigned long)in_length), NULL);
}
return 0;
}
static int lcrypt_hmac_done(lua_State *L)
{
hmac_state *h = luaL_checkudata(L, 1, "LCRYPT_HMAC_STATE");
if(likely(h->hash >= 0))
{
unsigned long out_length = hash_descriptor[h->hash].hashsize;
unsigned char * out = (unsigned char *)alloca(out_length);
lcrypt_error(L, hmac_done(h, out, &out_length), NULL);
lua_pushlstring(L, (char*)out, out_length);
memset(h, 0, sizeof(hmac_state));
h->hash = -1;
return 1;
}
return 0;
}
static int lcrypt_hmac_state_gc(lua_State *L)
{
hmac_state *h = luaL_checkudata(L, 1, "LCRYPT_HMAC_STATE");
if(likely(h->hash >= 0))
{
unsigned long out_length = hash_descriptor[h->hash].hashsize;
unsigned char * out = (unsigned char *)alloca(out_length);
lcrypt_error(L, hmac_done(h, out, &out_length), NULL);
memset(h, 0, sizeof(hmac_state));
h->hash = -1;
}
return 0;
}
static int lcrypt_hash_index(lua_State *L)
{
int *h = luaL_checkudata(L, 1, "LCRYPT_HASH");
const char *index = luaL_checkstring(L, 2);
if(strcmp(index, "type") == 0) { lua_pushstring(L, "LCRYPT_HASH"); return 1; }
if(strcmp(index, "name") == 0) { lua_pushstring(L, hash_descriptor[*h].name); return 1; }
if(strcmp(index, "hash_size") == 0) { lua_pushinteger(L, hash_descriptor[*h].hashsize); return 1; }
if(strcmp(index, "block_size") == 0) { lua_pushinteger(L, hash_descriptor[*h].blocksize); return 1; }
if(strcmp(index, "hash") == 0) { lua_pushcfunction(L, lcrypt_hash_hash); return 1; }
if(strcmp(index, "hmac") == 0) { lua_pushcfunction(L, lcrypt_hash_hmac); return 1; }
return 0;
}
static int lcrypt_hash_state_index(lua_State *L)
{
lcrypt_hash *h = luaL_checkudata(L, 1, "LCRYPT_HASH_STATE");
if(likely(h->hash >= 0))
{
const char *index = luaL_checkstring(L, 2);
if(strcmp(index, "type") == 0) { lua_pushstring(L, "LCRYPT_HASH_STATE"); return 1; }
if(strcmp(index, "name") == 0) { lua_pushstring(L, hash_descriptor[h->hash].name); return 1; }
if(strcmp(index, "hash_size") == 0) { lua_pushinteger(L, hash_descriptor[h->hash].hashsize); return 1; }
if(strcmp(index, "block_size") == 0) { lua_pushinteger(L, hash_descriptor[h->hash].blocksize); return 1; }
if(strcmp(index, "add") == 0) { lua_pushcfunction(L, lcrypt_hash_add); return 1; }
if(strcmp(index, "done") == 0) { lua_pushcfunction(L, lcrypt_hash_done); return 1; }
}
return 0;
}
static int lcrypt_hmac_state_index(lua_State *L)
{
hmac_state *h = luaL_checkudata(L, 1, "LCRYPT_HMAC_STATE");
if(likely(h->hash >= 0))
{
const char *index = luaL_checkstring(L, 2);
if(strcmp(index, "type") == 0) { lua_pushstring(L, "LCRYPT_HMAC_STATE"); return 1; }
if(strcmp(index, "hash") == 0) { lua_pushstring(L, hash_descriptor[h->hash].name); return 1; }
if(strcmp(index, "hash_size") == 0) { lua_pushinteger(L, hash_descriptor[h->hash].hashsize); return 1; }
if(strcmp(index, "block_size") == 0) { lua_pushinteger(L, hash_descriptor[h->hash].blocksize); return 1; }
if(strcmp(index, "add") == 0) { lua_pushcfunction(L, lcrypt_hmac_add); return 1; }
if(strcmp(index, "done") == 0) { lua_pushcfunction(L, lcrypt_hmac_done); return 1; }
}
return 0;
}
static const struct luaL_reg lcrypt_hash_flib[] =
{
{ "__index", lcrypt_hash_index },
{ NULL, NULL }
};
static const struct luaL_reg lcrypt_hash_state_flib[] =
{
{ "__index", lcrypt_hash_state_index },
{ "__gc", lcrypt_hash_state_gc },
{ NULL, NULL }
};
static const struct luaL_reg lcrypt_hmac_state_flib[] =
{
{ "__index", lcrypt_hmac_state_index },
{ "__gc", lcrypt_hmac_state_gc },
{ NULL, NULL }
};
static void lcrypt_start_hashes(lua_State *L)
{
(void)luaL_newmetatable(L, "LCRYPT_HASH"); (void)luaL_register(L, NULL, lcrypt_hash_flib); lua_pop(L, 1);
lua_pushstring(L, "hashes");
lua_newtable(L);
#define ADD_HASH(L,name) \
{ \
lua_pushstring(L, #name); \
int *hash_index = lua_newuserdata(L, sizeof(int)); \
luaL_getmetatable(L, "LCRYPT_HASH"); \
(void)lua_setmetatable(L, -2); \
*hash_index = register_hash(&name ## _desc); \
lua_settable(L, -3); \
}
ADD_HASH(L, whirlpool); ADD_HASH(L, sha512); ADD_HASH(L, sha384); ADD_HASH(L, rmd320);
ADD_HASH(L, sha256); ADD_HASH(L, rmd256); ADD_HASH(L, sha224); ADD_HASH(L, tiger);
ADD_HASH(L, sha1); ADD_HASH(L, rmd160); ADD_HASH(L, rmd128); ADD_HASH(L, md5);
ADD_HASH(L, md4); ADD_HASH(L, md2);
#undef ADD_HASH
lua_settable(L, -3);
(void)luaL_newmetatable(L, "LCRYPT_HASH_STATE"); (void)luaL_register(L, NULL, lcrypt_hash_state_flib); lua_pop(L, 1);
(void)luaL_newmetatable(L, "LCRYPT_HMAC_STATE"); (void)luaL_register(L, NULL, lcrypt_hmac_state_flib); lua_pop(L, 1);
}
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