1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2001 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 = VCWD_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 = VCWD_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 (!VCWD_GETCWD(cwd, MAXPATHLEN)) {
php_error(E_WARNING, "Unable to access current working directory");
return 0;
}
ret = VCWD_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;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 tw=78 fdm=marker
* vim<600: sw=4 ts=4 tw=78
*/
|
