funcao BuscaMysql(COMANDO)
local Busca = con:exec(COMANDO); tem_erro(con,Busca);
local Resultado, Busca = con:obt_resultado();
local TBFinal={}
local Coluna = Resultado->obt_coluna();
enquanto 1 inicio
local Linha = Resultado->obt_linha();
se Linha entao
local TC = {}
para i,v em ipares(Coluna) inicio
TC[v] = Linha[i]
fim
tabela.insira(TBFinal,TC)
senao
quebre
fim
fim
retorne TBFinal
fim
// Module for cryptography
#include <c_errno.h>
#include "module.h"
#include "lauxlib.h"
#include "platform.h"
#include "c_types.h"
#include "c_stdlib.h"
#include "vfs.h"
#include "../crypto/digests.h"
#include "../crypto/mech.h"
#include "lmem.h"
#include "user_interface.h"
#include "rom.h"
typedef struct {
const digest_mech_info_t *mech_info;
void *ctx;
uint8_t *k_opad;
} digest_user_datum_t;
/**
* hash = crypto.sha1(input)
*
* Calculates raw SHA1 hash of input string.
* Input is arbitrary string, output is raw 20-byte hash as string.
*/
static int crypto_sha1( lua_State* L )
{
SHA1_CTX ctx;
uint8_t digest[20];
// Read the string from lua (with length)
int len;
const char* msg = luaL_checklstring(L, 1, &len);
// Use the SHA* functions in the rom
SHA1Init(&ctx);
SHA1Update(&ctx, msg, len);
SHA1Final(digest, &ctx);
// Push the result as a lua string
lua_pushlstring(L, digest, 20);
return 1;
}
#ifdef LUA_USE_MODULES_ENCODER
static int call_encoder( lua_State* L, const char *function ) {
if (lua_gettop(L) != 1) {
luaL_error(L, "%s must have one argument", function);
}
lua_getfield(L, LUA_GLOBALSINDEX, "encoder");
if (!lua_istable(L, -1) && !lua_isrotable(L, -1)) { // also need table just in case encoder has been overloaded
luaL_error(L, "Cannot find encoder.%s", function);
}
lua_getfield(L, -1, function);
lua_insert(L, 1); //move function below the argument
lua_pop(L, 1); //and dump the encoder rotable from stack.
lua_call(L,1,1); // call encoder.xxx(string)
return 1;
}
static int crypto_base64_encode (lua_State* L) {
return call_encoder(L, "toBase64");
}
static int crypto_hex_encode (lua_State* L) {
return call_encoder(L, "toHex");
}
#else
static const char* bytes64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/**
* encoded = crypto.toBase64(raw)
*
* Encodes raw binary string as base64 string.
*/
static int crypto_base64_encode( lua_State* L )
{
int len;
const char* msg = luaL_checklstring(L, 1, &len);
int blen = (len + 2) / 3 * 4;
char* out = (char*)c_malloc(blen);
int j = 0, i;
for (i = 0; i < len; i += 3) {
int a = msg[i];
int b = (i + 1 < len) ? msg[i + 1] : 0;
int c = (i + 2 < len) ? msg[i + 2] : 0;
out[j++] = bytes64[a >> 2];
out[j++] = bytes64[((a & 3) << 4) | (b >> 4)];
out[j++] = (i + 1 < len) ? bytes64[((b & 15) << 2) | (c >> 6)] : 61;
out[j++] = (i + 2 < len) ? bytes64[(c & 63)] : 61;
}
lua_pushlstring(L, out, j);
c_free(out);
return 1;
}
/**
* encoded = crypto.toHex(raw)
*
* Encodes raw binary string as hex string.
*/
static int crypto_hex_encode( lua_State* L)
{
int len;
const char* msg = luaL_checklstring(L, 1, &len);
char* out = (char*)c_malloc(len * 2);
int i, j = 0;
for (i = 0; i < len; i++) {
out[j++] = crypto_hexbytes[msg[i] >> 4];
out[j++] = crypto_hexbytes[msg[i] & 0xf];
}
lua_pushlstring(L, out, len*2);
c_free(out);
return 1;
}
#endif
/**
* masked = crypto.mask(message, mask)
*
* Apply a mask (repeated if shorter than message) as XOR to each byte.
*/
static int crypto_mask( lua_State* L )
{
int len, mask_len;
const char* msg = luaL_checklstring(L, 1, &len);
const char* mask = luaL_checklstring(L, 2, &mask_len);
if(mask_len <= 0)
return luaL_error(L, "invalid argument: mask");
int i;
char* copy = (char*)c_malloc(len);
for (i = 0; i < len; i++) {
copy[i] = msg[i] ^ mask[i % mask_len];
}
lua_pushlstring(L, copy, len);
c_free(copy);
return 1;
}
static inline int bad_mech (lua_State *L) { return luaL_error (L, "unknown hash mech"); }
static inline int bad_mem (lua_State *L) { return luaL_error (L, "insufficient memory"); }
static inline int bad_file (lua_State *L) { return luaL_error (L, "file does not exist"); }
/* rawdigest = crypto.hash("MD5", str)
* strdigest = crypto.toHex(rawdigest)
*/
static int crypto_lhash (lua_State *L)
{
const digest_mech_info_t *mi = crypto_digest_mech (luaL_checkstring (L, 1));
if (!mi)
return bad_mech (L);
size_t len = 0;
const char *data = luaL_checklstring (L, 2, &len);
uint8_t digest[mi->digest_size];
if (crypto_hash (mi, data, len, digest) != 0)
return bad_mem (L);
lua_pushlstring (L, digest, sizeof (digest));
return 1;
}
/* General Usage for extensible hash functions:
* sha = crypto.new_hash("MD5")
* sha.update("Data")
* sha.update("Data2")
* strdigest = crypto.toHex(sha.finalize())
*/
#define WANT_HASH 0
#define WANT_HMAC 1
static int crypto_new_hash_hmac (lua_State *L, int what)
{
const digest_mech_info_t *mi = crypto_digest_mech (luaL_checkstring (L, 1));
if (!mi)
return bad_mech (L);
size_t len = 0;
const char *key = 0;
uint8_t *k_opad = 0;
if (what == WANT_HMAC)
{
key = luaL_checklstring (L, 2, &len);
k_opad = luaM_malloc (L, mi->block_size);
}
void *ctx = luaM_malloc (L, mi->ctx_size);
mi->create (ctx);
if (what == WANT_HMAC)
crypto_hmac_begin (ctx, mi, key, len, k_opad);
// create a userdataum with specific metatable
digest_user_datum_t *dudat = (digest_user_datum_t *)lua_newuserdata(L, sizeof(digest_user_datum_t));
luaL_getmetatable(L, "crypto.hash");
lua_setmetatable(L, -2);
// Set pointers to the mechanics and CTX
dudat->mech_info = mi;
dudat->ctx = ctx;
dudat->k_opad = k_opad;
return 1; // Pass userdata object back
}
/* crypto.new_hash("MECHTYPE") */
static int crypto_new_hash (lua_State *L)
{
return crypto_new_hash_hmac (L, WANT_HASH);
}
/* crypto.new_hmac("MECHTYPE", "KEY") */
static int crypto_new_hmac (lua_State *L)
{
return crypto_new_hash_hmac (L, WANT_HMAC);
}
/* Called as object, params:
1 - userdata "this"
2 - new string to add to the hash state */
static int crypto_hash_update (lua_State *L)
{
NODE_DBG("enter crypto_hash_update.\n");
digest_user_datum_t *dudat;
size_t sl;
dudat = (digest_user_datum_t *)luaL_checkudata(L, 1, "crypto.hash");
const digest_mech_info_t *mi = dudat->mech_info;
size_t len = 0;
const char *data = luaL_checklstring (L, 2, &len);
mi->update (dudat->ctx, data, len);
return 0; // No return value
}
/* Called as object, no params. Returns digest of default size. */
static int crypto_hash_finalize (lua_State *L)
{
NODE_DBG("enter crypto_hash_update.\n");
digest_user_datum_t *dudat;
size_t sl;
dudat = (digest_user_datum_t *)luaL_checkudata(L, 1, "crypto.hash");
const digest_mech_info_t *mi = dudat->mech_info;
uint8_t digest[mi->digest_size]; // Allocate as local
if (dudat->k_opad)
crypto_hmac_finalize (dudat->ctx, mi, dudat->k_opad, digest);
else
mi->finalize (digest, dudat->ctx);
lua_pushlstring (L, digest, sizeof (digest));
return 1;
}
/* Frees memory for the user datum and CTX hash state */
static int crypto_hash_gcdelete (lua_State *L)
{
NODE_DBG("enter crypto_hash_delete.\n");
digest_user_datum_t *dudat;
dudat = (digest_user_datum_t *)luaL_checkudata(L, 1, "crypto.hash");
// luaM_free() uses type info to obtain original size, so have to delve
// one level deeper and explicitly pass the size due to void*
luaM_realloc_ (L, dudat->ctx, dudat->mech_info->ctx_size, 0);
luaM_free (L, dudat->k_opad);
return 0;
}
static sint32_t vfs_read_wrap (int fd, void *ptr, size_t len)
{
return vfs_read (fd, ptr, len);
}
/* rawdigest = crypto.hash("MD5", filename)
* strdigest = crypto.toHex(rawdigest)
*/
static int crypto_flhash (lua_State *L)
{
const digest_mech_info_t *mi = crypto_digest_mech (luaL_checkstring (L, 1));
if (!mi)
return bad_mech (L);
const char *filename = luaL_checkstring (L, 2);
// Open the file
int file_fd = vfs_open (filename, "r");
if(!file_fd) {
return bad_file(L);
}
// Compute hash
uint8_t digest[mi->digest_size];
int returncode = crypto_fhash (mi, &vfs_read_wrap, file_fd, digest);
// Finish up
vfs_close(file_fd);
if (returncode == ENOMEM)
return bad_mem (L);
else if (returncode == EINVAL)
return bad_mech(L);
else
lua_pushlstring (L, digest, sizeof (digest));
return 1;
}
/* rawsignature = crypto.hmac("SHA1", str, key)
* strsignature = crypto.toHex(rawsignature)
*/
static int crypto_lhmac (lua_State *L)
{
const digest_mech_info_t *mi = crypto_digest_mech (luaL_checkstring (L, 1));
if (!mi)
return bad_mech (L);
size_t len = 0;
const char *data = luaL_checklstring (L, 2, &len);
size_t klen = 0;
const char *key = luaL_checklstring (L, 3, &klen);
uint8_t digest[mi->digest_size];
if (crypto_hmac (mi, data, len, key, klen, digest) != 0)
return bad_mem (L);
lua_pushlstring (L, digest, sizeof (digest));
return 1;
}
static const crypto_mech_t *get_mech (lua_State *L, int idx)
{
const char *name = luaL_checkstring (L, idx);
const crypto_mech_t *mech = crypto_encryption_mech (name);
if (mech)
return mech;
luaL_error (L, "unknown cipher: %s", name);
__builtin_unreachable ();
}
static int crypto_encdec (lua_State *L, bool enc)
{
const crypto_mech_t *mech = get_mech (L, 1);
size_t klen;
const char *key = luaL_checklstring (L, 2, &klen);
size_t dlen;
const char *data = luaL_checklstring (L, 3, &dlen);
size_t ivlen;
const char *iv = luaL_optlstring (L, 4, "", &ivlen);
size_t bs = mech->block_size;
size_t outlen = ((dlen + bs -1) / bs) * bs;
char *buf = (char *)os_zalloc (outlen);
if (!buf)
return luaL_error (L, "crypto init failed");
crypto_op_t op =
{
key, klen,
iv, ivlen,
data, dlen,
buf, outlen,
enc ? OP_ENCRYPT : OP_DECRYPT
};
if (!mech->run (&op))
{
os_free (buf);
return luaL_error (L, "crypto op failed");
}
else
{
lua_pushlstring (L, buf, outlen);
// note: if lua_pushlstring runs out of memory, we leak buf :(
os_free (buf);
return 1;
}
}
static int lcrypto_encrypt (lua_State *L)
{
return crypto_encdec (L, true);
}
static int lcrypto_decrypt (lua_State *L)
{
return crypto_encdec (L, false);
}
// Hash function map
static const LUA_REG_TYPE crypto_hash_map[] = {
{ LSTRKEY( "update" ), LFUNCVAL( crypto_hash_update ) },
{ LSTRKEY( "finalize" ), LFUNCVAL( crypto_hash_finalize ) },
{ LSTRKEY( "__gc" ), LFUNCVAL( crypto_hash_gcdelete ) },
{ LSTRKEY( "__index" ), LROVAL( crypto_hash_map ) },
{ LNILKEY, LNILVAL }
};
// Module function map
static const LUA_REG_TYPE crypto_map[] = {
{ LSTRKEY( "sha1" ), LFUNCVAL( crypto_sha1 ) },
{ LSTRKEY( "toBase64" ), LFUNCVAL( crypto_base64_encode ) },
{ LSTRKEY( "toHex" ), LFUNCVAL( crypto_hex_encode ) },
{ LSTRKEY( "mask" ), LFUNCVAL( crypto_mask ) },
{ LSTRKEY( "hash" ), LFUNCVAL( crypto_lhash ) },
{ LSTRKEY( "fhash" ), LFUNCVAL( crypto_flhash ) },
{ LSTRKEY( "new_hash" ), LFUNCVAL( crypto_new_hash ) },
{ LSTRKEY( "hmac" ), LFUNCVAL( crypto_lhmac ) },
{ LSTRKEY( "new_hmac" ), LFUNCVAL( crypto_new_hmac ) },
{ LSTRKEY( "encrypt" ), LFUNCVAL( lcrypto_encrypt ) },
{ LSTRKEY( "decrypt" ), LFUNCVAL( lcrypto_decrypt ) },
{ LNILKEY, LNILVAL }
};
int luaopen_crypto ( lua_State *L )
{
luaL_rometatable(L, "crypto.hash", (void *)crypto_hash_map); // create metatable for crypto.hash
return 0;
}
NODEMCU_MODULE(CRYPTO, "crypto", crypto_map, luaopen_crypto);
/*
biblioteca prisma para codificar um numero em base 256 e 10
um número extenso como 989238498234 pode ocupar apenas quatro cacacteres assim
economizando espaços.
linguagemprisma@gmail.com
linguagemprisma.br4.biz/blog
Adalberto set/2017
Licença MIT (use como bem quiser!):
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
local tab_insira = tabela.insira;
local mat_corte = mat.corte;
local str_car, str_cod = string.car, string.cod;
local tab_desempacote = tabela.desempacote;
local funcao reverta(tab)
local ret = {};
local cont = 1;
para i=#tab,1,-1 inicio
ret[cont] = tab[i];
cont = cont + 1;
fim
retorne ret;
fim
local funcao base10_256(b10)
local b10 = b10 ou 0;
local tmpa,tmpb = b10,0;
local tab = {};
enquanto 1 inicio
tmpb = tmpa % 256; //resto.
tmpa = mat_corte(tmpa / 256);//pega so a parte interia da divisao.
tab[#tab+1] = tmpb;
se tmpa == 0 entao quebre; fim
fim
retorne reverta(tab);
fim
local funcao base256_str(b256)
local tmp = '';
tmp = str_car(tab_desempacote(b256));
retorne tmp;
fim
local funcao base256_10(a,...)
local tab;
se tipo(a) == 'tabela' entao tab = a; senao
tab = {a,...};
fim
local tmp = tab[#tab];
local cont = 1;
para i = #tab - 1,1,-1 inicio
tmp = tmp + tab[i]*256^cont;
cont = cont + 1;
fim
retorne tmp;
fim
local base256 = {};
funcao base256.cod (b10)
se tipo(b10) <> 'numero' entao retorne falso,'Parâmetro #1 função cod() deve ser uma número'; fim
local ret = base10_256(b10);
retorne base256_str(ret);
fim
funcao base256.decod(str256)
se tipo(str256) <> 'string' entao retorne falso,'Parâmetro #1 função decod() deve ser uma string'; fim
retorne base256_10(str_cod(str256,1,#str256));
fim
local num = 91234567891234; //14 digitos são codificados em uma string de 6 elementos.
local str256 = base256.cod(num);
imprima('base256 -->', str256 );
imprima('base10-->', base256.decod(str256) );
local a = 'ffgaz';
imprima( a, '- em base10-->', base256.decod(a) );//5 letras se transforma em um numero de 12 digitos.