mirror of
https://github.com/php/php-src.git
synced 2024-11-24 18:34:21 +08:00
277 lines
7.1 KiB
C
277 lines
7.1 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| PHP Version 5 |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1997-2012 The PHP Group |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 3.01 of the PHP license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| http://www.php.net/license/3_01.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. |
|
|
+----------------------------------------------------------------------+
|
|
| Author: 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"
|
|
#include "php_globals.h"
|
|
|
|
/*
|
|
* php_checkuid
|
|
*
|
|
* This function has six 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)
|
|
* 4 - check mode and param
|
|
* 5 - only check file
|
|
*/
|
|
|
|
PHPAPI int php_checkuid_ex(const char *filename, const char *fopen_mode, int mode, int flags)
|
|
{
|
|
struct stat sb;
|
|
int ret, nofile=0;
|
|
long uid=0L, gid=0L, duid=0L, dgid=0L;
|
|
char path[MAXPATHLEN];
|
|
char *s, filenamecopy[MAXPATHLEN];
|
|
TSRMLS_FETCH();
|
|
|
|
path[0] = '\0';
|
|
|
|
if (!filename) {
|
|
return 0; /* path must be provided */
|
|
}
|
|
|
|
if (strlcpy(filenamecopy, filename, MAXPATHLEN)>=MAXPATHLEN) {
|
|
return 0;
|
|
}
|
|
filename=(char *)&filenamecopy;
|
|
|
|
if (fopen_mode) {
|
|
if (fopen_mode[0] == 'r') {
|
|
mode = CHECKUID_DISALLOW_FILE_NOT_EXISTS;
|
|
} else {
|
|
mode = CHECKUID_CHECK_FILE_AND_DIR;
|
|
}
|
|
}
|
|
|
|
/* First we see if the file is owned by the same user...
|
|
* If that fails, passthrough and check directory...
|
|
*/
|
|
if (mode != CHECKUID_ALLOW_ONLY_DIR) {
|
|
#if HAVE_BROKEN_GETCWD
|
|
char ftest[MAXPATHLEN];
|
|
|
|
strcpy(ftest, filename);
|
|
if (VCWD_GETCWD(ftest, sizeof(ftest)) == NULL) {
|
|
strcpy(path, filename);
|
|
} else
|
|
#endif
|
|
expand_filepath(filename, path TSRMLS_CC);
|
|
|
|
ret = VCWD_STAT(path, &sb);
|
|
if (ret < 0) {
|
|
if (mode == CHECKUID_DISALLOW_FILE_NOT_EXISTS) {
|
|
if ((flags & CHECKUID_NO_ERRORS) == 0) {
|
|
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to access %s", filename);
|
|
}
|
|
return 0;
|
|
} else if (mode == CHECKUID_ALLOW_FILE_NOT_EXISTS) {
|
|
if ((flags & CHECKUID_NO_ERRORS) == 0) {
|
|
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to access %s", filename);
|
|
}
|
|
return 1;
|
|
}
|
|
nofile = 1;
|
|
} else {
|
|
uid = sb.st_uid;
|
|
gid = sb.st_gid;
|
|
if (uid == php_getuid()) {
|
|
return 1;
|
|
} else if (PG(safe_mode_gid) && gid == php_getgid()) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* Trim off filename */
|
|
if ((s = strrchr(path, DEFAULT_SLASH))) {
|
|
if (*(s + 1) == '\0' && s != path) { /* make sure that the / is not the last character */
|
|
*s = '\0';
|
|
s = strrchr(path, DEFAULT_SLASH);
|
|
}
|
|
if (s) {
|
|
if (s == path) {
|
|
path[1] = '\0';
|
|
} else {
|
|
*s = '\0';
|
|
}
|
|
}
|
|
}
|
|
} else { /* CHECKUID_ALLOW_ONLY_DIR */
|
|
s = strrchr(filename, DEFAULT_SLASH);
|
|
|
|
if (s == filename) {
|
|
/* root dir */
|
|
path[0] = DEFAULT_SLASH;
|
|
path[1] = '\0';
|
|
} else if (s && *(s + 1) != '\0') { /* make sure that the / is not the last character */
|
|
*s = '\0';
|
|
VCWD_REALPATH(filename, path);
|
|
*s = DEFAULT_SLASH;
|
|
} else {
|
|
/* Under Solaris, getcwd() can fail if there are no
|
|
* read permissions on a component of the path, even
|
|
* though it has the required x permissions */
|
|
path[0] = '.';
|
|
path[1] = '\0';
|
|
VCWD_GETCWD(path, sizeof(path));
|
|
}
|
|
} /* end CHECKUID_ALLOW_ONLY_DIR */
|
|
|
|
if (mode != CHECKUID_ALLOW_ONLY_FILE) {
|
|
/* check directory */
|
|
ret = VCWD_STAT(path, &sb);
|
|
if (ret < 0) {
|
|
if ((flags & CHECKUID_NO_ERRORS) == 0) {
|
|
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to access %s", filename);
|
|
}
|
|
return 0;
|
|
}
|
|
duid = sb.st_uid;
|
|
dgid = sb.st_gid;
|
|
if (duid == php_getuid()) {
|
|
return 1;
|
|
} else if (PG(safe_mode_gid) && dgid == php_getgid()) {
|
|
return 1;
|
|
} else {
|
|
if (SG(rfc1867_uploaded_files)) {
|
|
if (zend_hash_exists(SG(rfc1867_uploaded_files), (char *) filename, strlen(filename)+1)) {
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mode == CHECKUID_ALLOW_ONLY_DIR) {
|
|
uid = duid;
|
|
gid = dgid;
|
|
if (s) {
|
|
*s = 0;
|
|
}
|
|
}
|
|
|
|
if (nofile) {
|
|
uid = duid;
|
|
gid = dgid;
|
|
filename = path;
|
|
}
|
|
|
|
if ((flags & CHECKUID_NO_ERRORS) == 0) {
|
|
if (PG(safe_mode_gid)) {
|
|
php_error_docref(NULL TSRMLS_CC, E_WARNING, "SAFE MODE Restriction in effect. The script whose uid/gid is %ld/%ld is not allowed to access %s owned by uid/gid %ld/%ld", php_getuid(), php_getgid(), filename, uid, gid);
|
|
} else {
|
|
php_error_docref(NULL TSRMLS_CC, E_WARNING, "SAFE MODE Restriction in effect. The script whose uid is %ld is not allowed to access %s owned by uid %ld", php_getuid(), filename, uid);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
PHPAPI int php_checkuid(const char *filename, const char *fopen_mode, int mode)
|
|
{
|
|
#ifdef NETWARE
|
|
/* NetWare don't have uid*/
|
|
return 1;
|
|
#else
|
|
return php_checkuid_ex(filename, fopen_mode, mode, 0);
|
|
#endif
|
|
}
|
|
|
|
PHPAPI char *php_get_current_user(void)
|
|
{
|
|
struct stat *pstat;
|
|
TSRMLS_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(TSRMLS_C);
|
|
|
|
if (!pstat) {
|
|
return "";
|
|
} else {
|
|
#ifdef PHP_WIN32
|
|
char name[256];
|
|
DWORD len = sizeof(name)-1;
|
|
|
|
if (!GetUserName(name, &len)) {
|
|
return "";
|
|
}
|
|
name[len] = '\0';
|
|
SG(request_info).current_user_length = len;
|
|
SG(request_info).current_user = estrndup(name, len);
|
|
return SG(request_info).current_user;
|
|
#else
|
|
struct passwd *pwd;
|
|
#if defined(ZTS) && defined(HAVE_GETPWUID_R) && defined(_SC_GETPW_R_SIZE_MAX)
|
|
struct passwd _pw;
|
|
struct passwd *retpwptr = NULL;
|
|
int pwbuflen = sysconf(_SC_GETPW_R_SIZE_MAX);
|
|
char *pwbuf;
|
|
|
|
if (pwbuflen < 1) {
|
|
return "";
|
|
}
|
|
pwbuf = emalloc(pwbuflen);
|
|
if (getpwuid_r(pstat->st_uid, &_pw, pwbuf, pwbuflen, &retpwptr) != 0) {
|
|
efree(pwbuf);
|
|
return "";
|
|
}
|
|
pwd = &_pw;
|
|
#else
|
|
if ((pwd=getpwuid(pstat->st_uid))==NULL) {
|
|
return "";
|
|
}
|
|
#endif
|
|
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);
|
|
#if defined(ZTS) && defined(HAVE_GETPWUID_R) && defined(_SC_GETPW_R_SIZE_MAX)
|
|
efree(pwbuf);
|
|
#endif
|
|
return SG(request_info).current_user;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
* vim600: sw=4 ts=4 fdm=marker
|
|
* vim<600: sw=4 ts=4
|
|
*/
|