mirror of
https://github.com/nmap/nmap.git
synced 2025-12-06 04:31:29 +00:00
07cfc5aee4
Moved the includes for Lua headers to the .cc files so they are not needlessly, repeatedly included. Similarly, moved some standard headers to the .cc files and reorganized includes to be uniform for all nse_* source files. Fixed whitespace (removed tabs).
406 lines
9.7 KiB
C++
406 lines
9.7 KiB
C++
/* lrexlib.c - PCRE regular expression library */
|
|
/* Reuben Thomas nov00-18dec04 */
|
|
/* Shmuel Zeigerman may04-18dec04 */
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
extern "C" {
|
|
#include "lua.h"
|
|
#include "lauxlib.h"
|
|
}
|
|
|
|
#include <locale.h>
|
|
|
|
#include "nbase.h"
|
|
#include "nmap_error.h"
|
|
|
|
#ifdef HAVE_PCRE_PCRE_H
|
|
# include <pcre/pcre.h>
|
|
#else
|
|
# include <pcre.h>
|
|
#endif
|
|
|
|
#include "nse_pcrelib.h"
|
|
|
|
static int get_startoffset(lua_State *L, int stackpos, size_t len)
|
|
{
|
|
int startoffset = luaL_optint(L, stackpos, 1);
|
|
if(startoffset > 0)
|
|
startoffset--;
|
|
else if(startoffset < 0) {
|
|
startoffset += (int) len;
|
|
if(startoffset < 0)
|
|
startoffset = 0;
|
|
}
|
|
return startoffset;
|
|
}
|
|
|
|
static int udata_tostring (lua_State *L, const char* type_handle,
|
|
const char* type_name)
|
|
{
|
|
char buf[256];
|
|
void *udata = luaL_checkudata(L, 1, type_handle);
|
|
|
|
if(udata) {
|
|
(void)Snprintf(buf, 255, "%s (%p)", type_name, udata);
|
|
lua_pushstring(L, buf);
|
|
}
|
|
else {
|
|
(void)Snprintf(buf, 255, "must be userdata of type '%s'", type_name);
|
|
(void)luaL_argerror(L, 1, buf);
|
|
}
|
|
|
|
free(udata);
|
|
return 1;
|
|
}
|
|
|
|
typedef struct { const char* key; lua_Number val; } flags_pair;
|
|
|
|
static int get_flags (lua_State *L, const flags_pair *arr)
|
|
{
|
|
const flags_pair *p;
|
|
lua_newtable(L);
|
|
for(p=arr; p->key != NULL; p++) {
|
|
lua_pushstring(L, p->key);
|
|
lua_pushnumber(L, p->val);
|
|
lua_rawset(L, -3);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
const char pcre_handle[] = "pcre_regex_handle";
|
|
const char pcre_typename[] = "pcre_regex";
|
|
|
|
typedef struct {
|
|
pcre *pr;
|
|
pcre_extra *extra;
|
|
int *match;
|
|
int ncapt;
|
|
const unsigned char *tables;
|
|
} pcre2; /* a better name is needed */
|
|
|
|
static const unsigned char *Lpcre_maketables(lua_State *L, int stackpos)
|
|
{
|
|
const unsigned char *tables;
|
|
char old_locale[256];
|
|
char *locale = strdup(luaL_checkstring(L, stackpos));
|
|
|
|
if(locale == NULL)
|
|
luaL_error(L, "cannot set locale");
|
|
|
|
strncpy(old_locale, setlocale(LC_CTYPE, NULL), 255); /* store the locale */
|
|
|
|
if(setlocale(LC_CTYPE, locale) == NULL) /* set new locale */
|
|
luaL_error(L, "cannot set locale");
|
|
|
|
tables = pcre_maketables(); /* make tables with new locale */
|
|
(void)setlocale(LC_CTYPE, old_locale); /* restore the old locale */
|
|
|
|
free(locale);
|
|
return tables;
|
|
}
|
|
|
|
static int Lpcre_comp(lua_State *L)
|
|
{
|
|
char buf[256];
|
|
const char *error;
|
|
int erroffset;
|
|
pcre2 *ud;
|
|
char *pattern = strdup(luaL_checkstring(L, 1));
|
|
int cflags = luaL_optint(L, 2, 0);
|
|
const unsigned char *tables = NULL;
|
|
|
|
if(lua_gettop(L) > 2 && !lua_isnil(L, 3))
|
|
tables = Lpcre_maketables(L, 3);
|
|
if(tables == NULL)
|
|
luaL_error(L, "PCRE compilation failed");
|
|
|
|
ud = (pcre2*)lua_newuserdata(L, sizeof(pcre2));
|
|
luaL_getmetatable(L, pcre_handle);
|
|
(void)lua_setmetatable(L, -2);
|
|
ud->match = NULL;
|
|
ud->extra = NULL;
|
|
ud->tables = tables; /* keep this for eventual freeing */
|
|
|
|
ud->pr = pcre_compile(pattern, cflags, &error, &erroffset, tables);
|
|
if(!ud->pr) {
|
|
(void)Snprintf(buf, 255, "%s (pattern offset: %d)", error, erroffset+1);
|
|
/* show offset 1-based as it's common in Lua */
|
|
luaL_error(L, buf);
|
|
}
|
|
|
|
ud->extra = pcre_study(ud->pr, 0, &error);
|
|
if(error) luaL_error(L, error);
|
|
|
|
pcre_fullinfo(ud->pr, ud->extra, PCRE_INFO_CAPTURECOUNT, &ud->ncapt);
|
|
/* need (2 ints per capture, plus one for substring match) * 3/2 */
|
|
ud->match = (int *) safe_malloc((ud->ncapt + 1) * 3 * sizeof(int));
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void Lpcre_getargs(lua_State *L, pcre2 **pud, const char **text,
|
|
size_t *text_len)
|
|
{
|
|
*pud = (pcre2 *)luaL_checkudata(L, 1, pcre_handle);
|
|
if(*pud == NULL)
|
|
(void)luaL_argerror(L, 1, ("compiled regexp expected"));
|
|
*text = luaL_checklstring(L, 2, text_len);
|
|
}
|
|
|
|
typedef void (*Lpcre_push_matches) (lua_State *L, const char *text, pcre2 *ud);
|
|
|
|
static void Lpcre_push_substrings (lua_State *L, const char *text, pcre2 *ud)
|
|
{
|
|
unsigned int i, j;
|
|
unsigned int namecount;
|
|
unsigned char *name_table;
|
|
int name_entry_size;
|
|
unsigned char *tabptr;
|
|
const int *match = ud->match;
|
|
|
|
lua_newtable(L);
|
|
for (i = 1; i <= (unsigned) ud->ncapt; i++) {
|
|
j = i * 2;
|
|
if (match[j] >= 0)
|
|
lua_pushlstring(L, text + match[j], (size_t)(match[j + 1] - match[j]));
|
|
else
|
|
lua_pushboolean(L, 0);
|
|
lua_rawseti(L, -2, i);
|
|
}
|
|
|
|
/* now do named subpatterns - NJG */
|
|
(void)pcre_fullinfo(ud->pr, ud->extra, PCRE_INFO_NAMECOUNT, &namecount);
|
|
if (namecount <= 0)
|
|
return;
|
|
(void)pcre_fullinfo(ud->pr, ud->extra, PCRE_INFO_NAMETABLE, &name_table);
|
|
(void)pcre_fullinfo(ud->pr, ud->extra, PCRE_INFO_NAMEENTRYSIZE, &name_entry_size);
|
|
tabptr = name_table;
|
|
for (i = 0; i < namecount; i++) {
|
|
unsigned int n = (tabptr[0] << 8) | tabptr[1]; /* number of the capturing parenthesis */
|
|
if (n > 0 && n <= (unsigned) ud->ncapt) { /* check range */
|
|
unsigned int j = n * 2;
|
|
lua_pushstring(L, strdup((char*)tabptr + 2)); /* name of the capture, zero terminated */
|
|
if (match[j] >= 0)
|
|
lua_pushlstring(L, text + match[j], match[j + 1] - match[j]);
|
|
else
|
|
lua_pushboolean(L, 0);
|
|
lua_rawset(L, -3);
|
|
}
|
|
tabptr += name_entry_size;
|
|
}
|
|
}
|
|
|
|
static void Lpcre_push_offsets (lua_State *L, const char *text, pcre2 * ud)
|
|
{
|
|
unsigned int i, j, k;
|
|
if(text) {
|
|
/* suppress compiler warning */
|
|
}
|
|
lua_newtable(L);
|
|
for (i=1, j=1; i <= (unsigned) ud->ncapt; i++) {
|
|
k = i * 2;
|
|
if (ud->match[k] >= 0) {
|
|
lua_pushnumber(L, ud->match[k] + 1);
|
|
lua_rawseti(L, -2, j++);
|
|
lua_pushnumber(L, ud->match[k+1]);
|
|
lua_rawseti(L, -2, j++);
|
|
}
|
|
else {
|
|
lua_pushboolean(L, 0);
|
|
lua_rawseti(L, -2, j++);
|
|
lua_pushboolean(L, 0);
|
|
lua_rawseti(L, -2, j++);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int Lpcre_match_generic(lua_State *L, Lpcre_push_matches push_matches)
|
|
{
|
|
int res;
|
|
const char *text;
|
|
pcre2 *ud;
|
|
size_t elen;
|
|
int startoffset;
|
|
int eflags = luaL_optint(L, 4, 0);
|
|
|
|
Lpcre_getargs(L, &ud, &text, &elen);
|
|
startoffset = get_startoffset(L, 3, elen);
|
|
|
|
res = pcre_exec(ud->pr, ud->extra, text, (int)elen, startoffset, eflags,
|
|
ud->match, (ud->ncapt + 1) * 3);
|
|
if (res >= 0) {
|
|
lua_pushnumber(L, (lua_Number) ud->match[0] + 1);
|
|
lua_pushnumber(L, (lua_Number) ud->match[1]);
|
|
(*push_matches)(L, text, ud);
|
|
return 3;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int Lpcre_match(lua_State *L)
|
|
{
|
|
return Lpcre_match_generic(L, Lpcre_push_substrings);
|
|
}
|
|
|
|
static int Lpcre_exec(lua_State *L)
|
|
{
|
|
return Lpcre_match_generic(L, Lpcre_push_offsets);
|
|
}
|
|
|
|
static int Lpcre_gmatch(lua_State *L)
|
|
{
|
|
int res;
|
|
size_t len;
|
|
int nmatch = 0, limit = 0;
|
|
const char *text;
|
|
pcre2 *ud;
|
|
int maxmatch = luaL_optint(L, 4, 0);
|
|
int eflags = luaL_optint(L, 5, 0);
|
|
int startoffset = 0;
|
|
Lpcre_getargs(L, &ud, &text, &len);
|
|
luaL_checktype(L, 3, LUA_TFUNCTION);
|
|
|
|
if(maxmatch > 0) /* this must be stated in the docs */
|
|
limit = 1;
|
|
|
|
while (!limit || nmatch < maxmatch) {
|
|
res = pcre_exec(ud->pr, ud->extra, text, (int)len, startoffset, eflags,
|
|
ud->match, (ud->ncapt + 1) * 3);
|
|
if (res >= 0) {
|
|
nmatch++;
|
|
lua_pushvalue(L, 3);
|
|
lua_pushlstring(L, text + ud->match[0], ud->match[1] - ud->match[0]);
|
|
Lpcre_push_substrings(L, text, ud);
|
|
lua_call(L, 2, 1);
|
|
if(lua_toboolean(L, -1))
|
|
break;
|
|
lua_pop(L, 1);
|
|
startoffset = ud->match[1];
|
|
} else
|
|
break;
|
|
}
|
|
lua_pushnumber(L, nmatch);
|
|
return 1;
|
|
}
|
|
|
|
static int Lpcre_gc (lua_State *L)
|
|
{
|
|
pcre2 *ud = (pcre2 *)luaL_checkudata(L, 1, pcre_handle);
|
|
if (ud) {
|
|
if(ud->pr) pcre_free(ud->pr);
|
|
if(ud->extra) pcre_free(ud->extra);
|
|
if(ud->tables) pcre_free((void *)ud->tables);
|
|
if(ud->match) free(ud->match);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int Lpcre_tostring (lua_State *L) {
|
|
return udata_tostring(L, pcre_handle, pcre_typename);
|
|
}
|
|
|
|
static int Lpcre_vers (lua_State *L)
|
|
{
|
|
lua_pushstring(L, pcre_version());
|
|
return 1;
|
|
}
|
|
|
|
static flags_pair pcre_flags[] =
|
|
{
|
|
{ "CASELESS", PCRE_CASELESS },
|
|
{ "MULTILINE", PCRE_MULTILINE },
|
|
{ "DOTALL", PCRE_DOTALL },
|
|
{ "EXTENDED", PCRE_EXTENDED },
|
|
{ "ANCHORED", PCRE_ANCHORED },
|
|
{ "DOLLAR_ENDONLY", PCRE_DOLLAR_ENDONLY },
|
|
{ "EXTRA", PCRE_EXTRA },
|
|
{ "NOTBOL", PCRE_NOTBOL },
|
|
{ "NOTEOL", PCRE_NOTEOL },
|
|
{ "UNGREEDY", PCRE_UNGREEDY },
|
|
{ "NOTEMPTY", PCRE_NOTEMPTY },
|
|
{ "UTF8", PCRE_UTF8 },
|
|
#if PCRE_MAJOR >= 4
|
|
{ "NO_AUTO_CAPTURE", PCRE_NO_AUTO_CAPTURE },
|
|
{ "NO_UTF8_CHECK", PCRE_NO_UTF8_CHECK },
|
|
#endif
|
|
#ifdef PCRE_AUTO_CALLOUT
|
|
{ "AUTO_CALLOUT", PCRE_AUTO_CALLOUT },
|
|
#endif
|
|
#ifdef PCRE_PARTIAL
|
|
{ "PARTIAL", PCRE_PARTIAL },
|
|
#endif
|
|
#ifdef PCRE_DFA_SHORTEST
|
|
{ "DFA_SHORTEST", PCRE_DFA_SHORTEST },
|
|
#endif
|
|
#ifdef PCRE_DFA_RESTART
|
|
{ "DFA_RESTART", PCRE_DFA_RESTART },
|
|
#endif
|
|
#ifdef PCRE_FIRSTLINE
|
|
{ "FIRSTLINE", PCRE_FIRSTLINE },
|
|
#endif
|
|
#ifdef PCRE_DUPNAMES
|
|
{ "DUPNAMES", PCRE_DUPNAMES },
|
|
#endif
|
|
#ifdef PCRE_NEWLINE_CR
|
|
{ "NEWLINE_CR", PCRE_NEWLINE_CR },
|
|
#endif
|
|
#ifdef PCRE_NEWLINE_LF
|
|
{ "NEWLINE_LF", PCRE_NEWLINE_LF },
|
|
#endif
|
|
#ifdef PCRE_NEWLINE_CRLF
|
|
{ "NEWLINE_CRLF", PCRE_NEWLINE_CRLF },
|
|
#endif
|
|
#ifdef PCRE_NEWLINE_ANY
|
|
{ "NEWLINE_ANY", PCRE_NEWLINE_ANY },
|
|
#endif
|
|
#ifdef PCRE_NEWLINE_ANYCRLF
|
|
{ "NEWLINE_ANYCRLF", PCRE_NEWLINE_ANYCRLF },
|
|
#endif
|
|
#ifdef PCRE_BSR_ANYCRLF
|
|
{ "BSR_ANYCRLF", PCRE_BSR_ANYCRLF },
|
|
#endif
|
|
#ifdef PCRE_BSR_UNICODE
|
|
{ "BSR_UNICODE", PCRE_BSR_UNICODE },
|
|
#endif
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
static int Lpcre_get_flags (lua_State *L) {
|
|
return get_flags(L, pcre_flags);
|
|
}
|
|
|
|
static const luaL_reg pcremeta[] = {
|
|
{"exec", Lpcre_exec},
|
|
{"match", Lpcre_match},
|
|
{"gmatch", Lpcre_gmatch},
|
|
{"__gc", Lpcre_gc},
|
|
{"__tostring", Lpcre_tostring},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
/* Open the library */
|
|
static const luaL_reg pcrelib[] = {
|
|
{"new", Lpcre_comp},
|
|
{"flags", Lpcre_get_flags},
|
|
{"version", Lpcre_vers},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
LUALIB_API int luaopen_pcrelib(lua_State *L)
|
|
{
|
|
luaL_newmetatable(L, pcre_handle);
|
|
lua_pushliteral(L, "__index");
|
|
lua_pushvalue(L, -2);
|
|
lua_rawset(L, -3);
|
|
luaL_register(L, NULL, pcremeta);
|
|
lua_pop(L, 1);
|
|
luaL_register(L, NSE_PCRELIBNAME, pcrelib);
|
|
|
|
return 1;
|
|
}
|
|
|