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/*
* xxpath.c
* An implementation of a subset of xpath for Lua 5.1
* Waqas Hussain <waqas20@gmail.com>
* 05 Oct 2008 15:28:15
*/
#include <string.h>
#include "lua.h"
#include "lauxlib.h"
#include <openssl/sha.h>
#include <openssl/md5.h>
/*//typedef unsigned int uint32;
#define uint32 unsigned int
#define chrsz 8
#define hexcase 0
uint32 safe_add(uint32 x, uint32 y) {
uint32 lsw = (x & 0xFFFF) + (y & 0xFFFF);
uint32 msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
uint32 S (uint32 X, uint32 n) { return ( X >> n ) | (X << (32 - n)); }
uint32 R (uint32 X, uint32 n) { return ( X >> n ); }
uint32 Ch(uint32 x, uint32 y, uint32 z) { return ((x & y) ^ ((~x) & z)); }
uint32 Maj(uint32 x, uint32 y, uint32 z) { return ((x & y) ^ (x & z) ^ (y & z)); }
uint32 Sigma0256(uint32 x) { return (S(x, 2) ^ S(x, 13) ^ S(x, 22)); }
uint32 Sigma1256(uint32 x) { return (S(x, 6) ^ S(x, 11) ^ S(x, 25)); }
uint32 Gamma0256(uint32 x) { return (S(x, 7) ^ S(x, 18) ^ R(x, 3)); }
uint32 Gamma1256(uint32 x) { return (S(x, 17) ^ S(x, 19) ^ R(x, 10)); }
static const uint32 K[64] = {0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, 0xFC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x6CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2};
void core_sha256 (char* m, uint32 l, uint32 m_length, uint32 out[8]) {
uint32 HASH[8] = {0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19};
uint32 W[64];
uint32 a, b, c, d, e, f, g, h, i, j;
uint32 T1, T2;
//uint32 i, j;
printf("core_sha256: start\n");
m[l >> 5] |= 0x80 << (24 - l % 32);
m[((l + 64 >> 9) << 4) + 15] = l;
printf("core_sha256: 1\n");
for ( i = 0; i<m_length; i+=16 ) {
a = HASH[0];
b = HASH[1];
c = HASH[2];
d = HASH[3];
e = HASH[4];
f = HASH[5];
g = HASH[6];
h = HASH[7];
for ( j = 0; j<64; j++) {
if (j < 16) W[j] = m[j + i];
else W[j] = safe_add(safe_add(safe_add(Gamma1256(W[j - 2]), W[j - 7]), Gamma0256(W[j - 15])), W[j - 16]);
T1 = safe_add(safe_add(safe_add(safe_add(h, Sigma1256(e)), Ch(e, f, g)), K[j]), W[j]);
T2 = safe_add(Sigma0256(a), Maj(a, b, c));
h = g;
g = f;
f = e;
e = safe_add(d, T1);
d = c;
c = b;
b = a;
a = safe_add(T1, T2);
}
HASH[0] = safe_add(a, HASH[0]);
HASH[1] = safe_add(b, HASH[1]);
HASH[2] = safe_add(c, HASH[2]);
HASH[3] = safe_add(d, HASH[3]);
HASH[4] = safe_add(e, HASH[4]);
HASH[5] = safe_add(f, HASH[5]);
HASH[6] = safe_add(g, HASH[6]);
HASH[7] = safe_add(h, HASH[7]);
}
printf("core_sha256: 2\n");
out[0] = HASH[0];
out[1] = HASH[1];
out[2] = HASH[2];
out[3] = HASH[3];
out[4] = HASH[4];
out[5] = HASH[5];
out[6] = HASH[6];
out[7] = HASH[7];
printf("core_sha256: end\n");
}
void binb2hex (const uint32 binarray[8], char str[65]) {
const char* hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
uint32 pos = 0;
int i;
printf("binb2hex: start\n");
//var str = "";
for(i = 0; i < 8 * 4; i++) {
str[pos++] = hex_tab[(binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF];
str[pos++] = hex_tab[(binarray[i>>2] >> ((3 - i%4)*8 )) & 0xF];
}
//return str;
str[64] = 0;
printf("binb2hex: end\n");
}
static void sha256(const char* s, uint32 s_length, char output[65]) {
uint32 hash[8];
char* copy;
printf("sha256: start\n");
copy = (char*) malloc(s_length + 1);
strcpy(copy, s);
core_sha256(copy, s_length * chrsz, s_length, hash);
free(copy);
binb2hex(hash, output);
printf("sha256: end\n");
//s = Utf8Encode(s);
//return binb2hex(core_sha256(str2binb(s), s.length * chrsz));
}
*/
//static int Lsha256(lua_State *L) /** sha256(s) */
/*{
size_t l;
const char *s = luaL_checklstring(L, 1, &l);
int len = strlen(s);
char hash[32];
char result[65];
//sha256(s, len, hash);
SHA256(s, len, hash);
toHex(hash, 32, result);
//printf("input: %s, length: %d, outlen: %d\n", s, len, strlen(result));
lua_pushstring(L, result);
return 1;
}*/
const char* hex_tab = "0123456789abcdef";
void toHex(const char* in, int length, char* out) {
int i;
for (i = 0; i < length; i++) {
out[i*2] = hex_tab[(in[i] >> 4) & 0xF];
out[i*2+1] = hex_tab[(in[i]) & 0xF];
}
//out[i*2] = 0;
}
#define MAKE_HASH_FUNCTION(myFunc, func, size) \
static int myFunc(lua_State *L) { \
size_t len; \
const char *s = luaL_checklstring(L, 1, &len); \
int hex_out = lua_toboolean(L, 2); \
char hash[size]; \
char result[size*2]; \
func(s, len, hash); \
if (hex_out) { \
toHex(hash, size, result); \
lua_pushlstring(L, result, size*2); \
} else { \
lua_pushlstring(L, hash, size);\
} \
return 1; \
}
MAKE_HASH_FUNCTION(Lsha1, SHA1, 20)
MAKE_HASH_FUNCTION(Lsha256, SHA256, 32)
MAKE_HASH_FUNCTION(Lmd5, MD5, 16)
static const luaL_Reg Reg[] =
{
{ "sha1", Lsha1 },
{ "sha256", Lsha256 },
{ "md5", Lmd5 },
{ NULL, NULL }
};
LUALIB_API int luaopen_hashes(lua_State *L)
{
luaL_register(L, "hashes", Reg);
lua_pushliteral(L, "version"); /** version */
lua_pushliteral(L, "-3.14");
lua_settable(L,-3);
return 1;
}
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