php-src/main/safe_mode.c
Andi Gutmans 033190cbcf - Fix warning
PR:
Submitted by:
Reviewed by:
Obtained from:
2001-02-12 15:47:38 +00:00

166 lines
4.3 KiB
C

/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997, 1998, 1999, 2000 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <rasmus@lerdorf.on.ca> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include <stdio.h>
#include <stdlib.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/stat.h>
#include "ext/standard/pageinfo.h"
#include "safe_mode.h"
#include "SAPI.h"
/*
* php_checkuid
*
* This function has four modes:
*
* 0 - return invalid (0) if file does not exist
* 1 - return valid (1) if file does not exist
* 2 - if file does not exist, check directory
* 3 - only check directory (needed for mkdir)
*/
PHPAPI int php_checkuid(const char *filename, char *fopen_mode, int mode)
{
struct stat sb;
int ret;
long uid=0L, duid=0L;
char *s;
if (!filename) {
return 0; /* path must be provided */
}
if (fopen_mode) {
if (fopen_mode[0] == 'r') {
mode = CHECKUID_DISALLOW_FILE_NOT_EXISTS;
} else {
mode = CHECKUID_CHECK_FILE_AND_DIR;
}
}
/*
* If given filepath is a URL, allow - safe mode stuff
* related to URL's is checked in individual functions
*/
if (!strncasecmp(filename,"http://",7) || !strncasecmp(filename,"ftp://",6)) {
return 1;
}
if (mode != CHECKUID_ALLOW_ONLY_DIR) {
ret = V_STAT(filename, &sb);
if (ret < 0) {
if (mode == CHECKUID_DISALLOW_FILE_NOT_EXISTS) {
php_error(E_WARNING, "Unable to access %s", filename);
return 0;
} else if (mode == CHECKUID_ALLOW_FILE_NOT_EXISTS)
php_error(E_WARNING, "Unable to access %s", filename);{
return 1;
}
} else {
uid = sb.st_uid;
if (uid == php_getuid()) {
return 1;
}
}
}
s = strrchr(filename,'/');
/* This loop gets rid of trailing slashes which could otherwise be
* used to confuse the function.
*/
while(s && *(s+1)=='\0' && s>filename) {
*s='\0';
s = strrchr(filename,'/');
}
if (s) {
*s='\0';
ret = V_STAT(filename, &sb);
*s='/';
if (ret < 0) {
php_error(E_WARNING, "Unable to access %s", filename);
return 0;
}
duid = sb.st_uid;
} else {
char cwd[MAXPATHLEN];
if (!V_GETCWD(cwd, MAXPATHLEN)) {
php_error(E_WARNING, "Unable to access current working directory");
return 0;
}
ret = V_STAT(cwd, &sb);
if (ret < 0) {
php_error(E_WARNING, "Unable to access %s", cwd);
return 0;
}
duid = sb.st_uid;
}
if (duid == (uid=php_getuid())) {
return 1;
} else {
SLS_FETCH();
if (SG(rfc1867_uploaded_files)) {
if (zend_hash_exists(SG(rfc1867_uploaded_files), (char *) filename, strlen(filename)+1)) {
return 1;
}
}
php_error(E_WARNING, "SAFE MODE Restriction in effect. The script whose uid is %ld is not allowed to access %s owned by uid %ld", uid, filename, duid);
return 0;
}
}
PHPAPI char *php_get_current_user()
{
struct passwd *pwd;
struct stat *pstat;
SLS_FETCH();
if (SG(request_info).current_user) {
return SG(request_info).current_user;
}
/* FIXME: I need to have this somehow handled if
USE_SAPI is defined, because cgi will also be
interfaced in USE_SAPI */
pstat = sapi_get_stat();
if (!pstat) {
return empty_string;
}
if ((pwd=getpwuid(pstat->st_uid))==NULL) {
return empty_string;
}
SG(request_info).current_user_length = strlen(pwd->pw_name);
SG(request_info).current_user = estrndup(pwd->pw_name, SG(request_info).current_user_length);
return SG(request_info).current_user;
}