|
1
|
|
|
<?php |
|
2
|
|
|
/********************************************************************************* |
|
3
|
|
|
* SugarCRM Community Edition is a customer relationship management program developed by |
|
4
|
|
|
* SugarCRM, Inc. Copyright (C) 2004-2013 SugarCRM Inc. |
|
5
|
|
|
|
|
6
|
|
|
* SuiteCRM is an extension to SugarCRM Community Edition developed by Salesagility Ltd. |
|
7
|
|
|
* Copyright (C) 2011 - 2014 Salesagility Ltd. |
|
8
|
|
|
* |
|
9
|
|
|
* This program is free software; you can redistribute it and/or modify it under |
|
10
|
|
|
* the terms of the GNU Affero General Public License version 3 as published by the |
|
11
|
|
|
* Free Software Foundation with the addition of the following permission added |
|
12
|
|
|
* to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK |
|
13
|
|
|
* IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY |
|
14
|
|
|
* OF NON INFRINGEMENT OF THIRD PARTY RIGHTS. |
|
15
|
|
|
* |
|
16
|
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT |
|
17
|
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
|
18
|
|
|
* FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more |
|
19
|
|
|
* details. |
|
20
|
|
|
* |
|
21
|
|
|
* You should have received a copy of the GNU Affero General Public License along with |
|
22
|
|
|
* this program; if not, see http://www.gnu.org/licenses or write to the Free |
|
23
|
|
|
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
|
24
|
|
|
* 02110-1301 USA. |
|
25
|
|
|
* |
|
26
|
|
|
* You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road, |
|
27
|
|
|
* SW2-130, Cupertino, CA 95014, USA. or at email address [email protected]. |
|
28
|
|
|
* |
|
29
|
|
|
* The interactive user interfaces in modified source and object code versions |
|
30
|
|
|
* of this program must display Appropriate Legal Notices, as required under |
|
31
|
|
|
* Section 5 of the GNU Affero General Public License version 3. |
|
32
|
|
|
* |
|
33
|
|
|
* In accordance with Section 7(b) of the GNU Affero General Public License version 3, |
|
34
|
|
|
* these Appropriate Legal Notices must retain the display of the "Powered by |
|
35
|
|
|
* SugarCRM" logo and "Supercharged by SuiteCRM" logo. If the display of the logos is not |
|
36
|
|
|
* reasonably feasible for technical reasons, the Appropriate Legal Notices must |
|
37
|
|
|
* display the words "Powered by SugarCRM" and "Supercharged by SuiteCRM". |
|
38
|
|
|
********************************************************************************/ |
|
39
|
|
|
|
|
40
|
|
|
|
|
41
|
|
|
require_once 'include/HTMLPurifier/HTMLPurifier.standalone.php'; |
|
42
|
|
|
require_once 'include/HTMLPurifier/HTMLPurifier.autoload.php'; |
|
43
|
|
|
|
|
44
|
|
|
/** |
|
45
|
|
|
* cid: scheme implementation |
|
46
|
|
|
*/ |
|
47
|
|
|
class HTMLPurifier_URIScheme_cid extends HTMLPurifier_URIScheme |
|
48
|
|
|
{ |
|
49
|
|
|
public $browsable = true; |
|
50
|
|
|
public $may_omit_host = true; |
|
51
|
|
|
|
|
52
|
|
|
public function doValidate(&$uri, $config, $context) { |
|
53
|
|
|
$uri->userinfo = null; |
|
54
|
|
|
$uri->port = null; |
|
55
|
|
|
$uri->host = null; |
|
56
|
|
|
$uri->query = null; |
|
57
|
|
|
$uri->fragment = null; |
|
58
|
|
|
return true; |
|
59
|
|
|
} |
|
60
|
|
|
|
|
61
|
|
|
} |
|
62
|
|
|
|
|
63
|
|
|
class HTMLPurifier_Filter_Xmp extends HTMLPurifier_Filter |
|
|
|
|
|
|
64
|
|
|
{ |
|
65
|
|
|
|
|
66
|
|
|
public $name = 'Xmp'; |
|
67
|
|
|
|
|
68
|
5 |
|
public function preFilter($html, $config, $context) |
|
69
|
|
|
{ |
|
70
|
5 |
|
return preg_replace("#<(/)?xmp>#i", "<\\1pre>", $html); |
|
71
|
|
|
} |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
|
|
class SugarCleaner |
|
|
|
|
|
|
75
|
|
|
{ |
|
76
|
|
|
/** |
|
77
|
|
|
* Singleton instance |
|
78
|
|
|
* @var SugarCleaner |
|
79
|
|
|
*/ |
|
80
|
|
|
static public $instance; |
|
81
|
|
|
|
|
82
|
|
|
/** |
|
83
|
|
|
* HTMLPurifier instance |
|
84
|
|
|
* @var HTMLPurifier |
|
85
|
|
|
*/ |
|
86
|
|
|
protected $purifier; |
|
87
|
|
|
|
|
88
|
1 |
|
function __construct() |
|
89
|
|
|
{ |
|
90
|
1 |
|
global $sugar_config; |
|
91
|
1 |
|
$config = HTMLPurifier_Config::createDefault(); |
|
92
|
|
|
|
|
93
|
1 |
|
if(!is_dir(sugar_cached("htmlclean"))) { |
|
94
|
|
|
create_cache_directory("htmlclean/"); |
|
95
|
|
|
} |
|
96
|
1 |
|
$config->set('HTML.Doctype', 'XHTML 1.0 Transitional'); |
|
97
|
1 |
|
$config->set('Core.Encoding', 'UTF-8'); |
|
98
|
1 |
|
$hidden_tags = array('script' => true, 'style' => true, 'title' => true, 'head' => true); |
|
99
|
1 |
|
$config->set('Core.HiddenElements', $hidden_tags); |
|
100
|
1 |
|
$config->set('Cache.SerializerPath', sugar_cached("htmlclean")); |
|
101
|
1 |
|
$config->set('URI.Base', $sugar_config['site_url']); |
|
102
|
1 |
|
$config->set('CSS.Proprietary', true); |
|
103
|
1 |
|
$config->set('HTML.TidyLevel', 'light'); |
|
104
|
1 |
|
$config->set('HTML.ForbiddenElements', array('body' => true, 'html' => true)); |
|
105
|
1 |
|
$config->set('AutoFormat.RemoveEmpty', false); |
|
106
|
1 |
|
$config->set('Cache.SerializerPermissions', 0775); |
|
107
|
|
|
// for style |
|
108
|
|
|
//$config->set('Filter.ExtractStyleBlocks', true); |
|
109
|
1 |
|
$config->set('Filter.ExtractStyleBlocks.TidyImpl', false); // can't use csstidy, GPL |
|
110
|
1 |
|
if(!empty($GLOBALS['sugar_config']['html_allow_objects'])) { |
|
111
|
|
|
// for object |
|
112
|
|
|
$config->set('HTML.SafeObject', true); |
|
113
|
|
|
// for embed |
|
114
|
|
|
$config->set('HTML.SafeEmbed', true); |
|
115
|
|
|
} |
|
116
|
1 |
|
$config->set('Output.FlashCompat', true); |
|
117
|
|
|
// for iframe and xmp |
|
118
|
1 |
|
$config->set('Filter.Custom', array(new HTMLPurifier_Filter_Xmp())); |
|
119
|
|
|
// for link |
|
120
|
1 |
|
$config->set('HTML.DefinitionID', 'Sugar HTML Def'); |
|
121
|
1 |
|
$config->set('HTML.DefinitionRev', 2); |
|
122
|
1 |
|
$config->set('Cache.SerializerPath', sugar_cached('htmlclean/')); |
|
123
|
|
|
// IDs are namespaced |
|
124
|
1 |
|
$config->set('Attr.EnableID', true); |
|
125
|
1 |
|
$config->set('Attr.IDPrefix', 'sugar_text_'); |
|
126
|
|
|
|
|
127
|
1 |
|
if ($def = $config->maybeGetRawHTMLDefinition()) { |
|
128
|
|
|
$form = $def->addElement( |
|
129
|
|
|
'link', // name |
|
130
|
|
|
'Flow', // content set |
|
131
|
|
|
'Empty', // allowed children |
|
132
|
|
|
'Core', // attribute collection |
|
133
|
|
|
array( // attributes |
|
134
|
|
|
'href*' => 'URI', |
|
135
|
|
|
'rel' => 'Enum#stylesheet', // only stylesheets supported here |
|
136
|
|
|
'type' => 'Enum#text/css' // only CSS supported here |
|
137
|
|
|
) |
|
138
|
|
|
); |
|
139
|
|
|
$iframe = $def->addElement( |
|
140
|
|
|
'iframe', // name |
|
141
|
|
|
'Flow', // content set |
|
142
|
|
|
'Optional: #PCDATA | Flow | Block', // allowed children |
|
143
|
|
|
'Core', // attribute collection |
|
144
|
|
|
array( // attributes |
|
145
|
|
|
'src*' => 'URI', |
|
146
|
|
|
'frameborder' => 'Enum#0,1', |
|
147
|
|
|
'marginwidth' => 'Pixels', |
|
148
|
|
|
'marginheight' => 'Pixels', |
|
149
|
|
|
'scrolling' => 'Enum#|yes,no,auto', |
|
150
|
|
|
'align' => 'Enum#top,middle,bottom,left,right,center', |
|
151
|
|
|
'height' => 'Length', |
|
152
|
|
|
'width' => 'Length', |
|
153
|
|
|
) |
|
154
|
|
|
); |
|
155
|
|
|
$iframe->excludes=array('iframe'); |
|
156
|
|
|
} |
|
157
|
1 |
|
$uri = $config->getDefinition('URI'); |
|
158
|
1 |
|
$uri->addFilter(new SugarURIFilter(), $config); |
|
159
|
1 |
|
HTMLPurifier_URISchemeRegistry::instance()->register('cid', new HTMLPurifier_URIScheme_cid()); |
|
160
|
|
|
|
|
161
|
1 |
|
$this->purifier = new HTMLPurifier($config); |
|
162
|
1 |
|
} |
|
163
|
|
|
|
|
164
|
|
|
/** |
|
165
|
|
|
* Get cleaner instance |
|
166
|
|
|
* @return SugarCleaner |
|
167
|
|
|
*/ |
|
168
|
5 |
|
public static function getInstance() |
|
169
|
|
|
{ |
|
170
|
5 |
|
if(is_null(self::$instance)) { |
|
171
|
1 |
|
self::$instance = new self; |
|
172
|
|
|
} |
|
173
|
5 |
|
return self::$instance; |
|
174
|
|
|
} |
|
175
|
|
|
|
|
176
|
|
|
/** |
|
177
|
|
|
* Clean string from potential XSS problems |
|
178
|
|
|
* @param string $html |
|
179
|
|
|
* @param bool $encoded Was it entity-encoded? |
|
180
|
|
|
* @return string |
|
181
|
|
|
*/ |
|
182
|
69 |
|
static public function cleanHtml($html, $encoded = false) |
|
|
|
|
|
|
183
|
|
|
{ |
|
184
|
69 |
|
if(empty($html)) return $html; |
|
185
|
|
|
|
|
186
|
69 |
|
if($encoded) { |
|
187
|
3 |
|
$html = from_html($html); |
|
188
|
|
|
} |
|
189
|
69 |
|
if(!preg_match('<[^-A-Za-z0-9 `~!@#$%^&*()_=+{}\[\];:\'",./\\?\r\n|\x80-\xFF]>', $html)) { |
|
190
|
|
|
/* if it only has "safe" chars, don't bother */ |
|
191
|
68 |
|
$cleanhtml = $html; |
|
192
|
|
|
} else { |
|
193
|
5 |
|
$purifier = self::getInstance()->purifier; |
|
194
|
5 |
|
$cleanhtml = $purifier->purify($html); |
|
195
|
|
|
// $styles = $purifier->context->get('StyleBlocks'); |
|
196
|
|
|
// if(count($styles) > 0) { |
|
197
|
|
|
// $cleanhtml = "<style>".join("</style><style>", $styles)."</style>".$cleanhtml; |
|
198
|
|
|
// } |
|
199
|
|
|
} |
|
200
|
69 |
|
if($encoded) { |
|
201
|
3 |
|
$cleanhtml = to_html($cleanhtml); |
|
202
|
|
|
} |
|
203
|
69 |
|
return $cleanhtml; |
|
204
|
|
|
} |
|
205
|
|
|
|
|
206
|
|
|
static public function stripTags($string, $encoded = true) |
|
|
|
|
|
|
207
|
|
|
{ |
|
208
|
|
|
if($encoded) { |
|
209
|
|
|
$string = from_html($string); |
|
210
|
|
|
} |
|
211
|
|
|
$string = filter_var($string, FILTER_SANITIZE_STRIPPED, FILTER_FLAG_NO_ENCODE_QUOTES); |
|
212
|
|
|
return $encoded?to_html($string):$string; |
|
213
|
|
|
} |
|
214
|
|
|
} |
|
215
|
|
|
|
|
216
|
|
|
/** |
|
217
|
|
|
* URI filter for HTMLPurifier |
|
218
|
|
|
* Approves only resource URIs that are in the list of trusted domains |
|
219
|
|
|
* Until we have comprehensive CSRF protection, we need to sanitize URLs in emails, etc. |
|
220
|
|
|
* to avoid CSRF attacks. |
|
221
|
|
|
*/ |
|
222
|
|
|
class SugarURIFilter extends HTMLPurifier_URIFilter |
|
|
|
|
|
|
223
|
|
|
{ |
|
224
|
|
|
public $name = 'SugarURIFilter'; |
|
225
|
|
|
// public $post = true; |
|
226
|
|
|
protected $allowed = array(); |
|
227
|
|
|
|
|
228
|
1 |
|
public function prepare($config) |
|
229
|
|
|
{ |
|
230
|
1 |
|
global $sugar_config; |
|
231
|
1 |
|
if(!empty($sugar_config['security_trusted_domains']) && is_array($sugar_config['security_trusted_domains'])) |
|
232
|
|
|
{ |
|
233
|
|
|
$this->allowed = $sugar_config['security_trusted_domains']; |
|
234
|
|
|
} |
|
235
|
|
|
/* Allow this host? |
|
236
|
|
|
$def = $config->getDefinition('URI'); |
|
237
|
|
|
if(!empty($def->base) && !empty($this->base->host)) { |
|
238
|
|
|
$this->allowed[] = $def->base->host; |
|
239
|
|
|
} |
|
240
|
|
|
*/ |
|
241
|
1 |
|
} |
|
242
|
|
|
|
|
243
|
|
|
public function filter(&$uri, $config, $context) |
|
244
|
|
|
{ |
|
245
|
|
|
// skip non-resource URIs |
|
246
|
|
|
if (!$context->get('EmbeddedURI', true)) return true; |
|
247
|
|
|
|
|
248
|
|
|
//if(empty($this->allowed)) return false; |
|
249
|
|
|
|
|
250
|
|
|
if(!empty($uri->scheme) && strtolower($uri->scheme) != 'http' && strtolower($uri->scheme) != 'https') { |
|
251
|
|
|
// do not touch non-HTTP URLs |
|
252
|
|
|
return true; |
|
253
|
|
|
} |
|
254
|
|
|
|
|
255
|
|
|
// relative URLs permitted since email templates use it |
|
256
|
|
|
// if(empty($uri->host)) return false; |
|
257
|
|
|
// allow URLs with no query |
|
258
|
|
|
if(empty($uri->query)) return true; |
|
259
|
|
|
|
|
260
|
|
|
// allow URLs for known good hosts |
|
261
|
|
|
foreach($this->allowed as $allow) { |
|
262
|
|
|
// must be equal to our domain or subdomain of our domain |
|
263
|
|
|
if($uri->host == $allow || substr($uri->host, -(strlen($allow)+1)) == ".$allow") { |
|
264
|
|
|
return true; |
|
265
|
|
|
} |
|
266
|
|
|
} |
|
267
|
|
|
|
|
268
|
|
|
// Here we try to block URLs that may be used for nasty XSRF stuff by |
|
269
|
|
|
// referring back to Sugar URLs |
|
270
|
|
|
// allow URLs that don't start with /? or /index.php? |
|
271
|
|
|
if(!empty($uri->path) && $uri->path != '/') { |
|
272
|
|
|
$lpath = strtolower($uri->path); |
|
273
|
|
|
if(substr($lpath, -10) != '/index.php' && $lpath != 'index.php') { |
|
274
|
|
|
return true; |
|
275
|
|
|
} |
|
276
|
|
|
} |
|
277
|
|
|
|
|
278
|
|
|
$query_items = array(); |
|
279
|
|
|
parse_str(from_html($uri->query), $query_items); |
|
280
|
|
|
// weird query, probably harmless |
|
281
|
|
|
if(empty($query_items)) return true; |
|
282
|
|
|
// suspiciously like SugarCRM query, reject |
|
283
|
|
|
if(!empty($query_items['module']) && !empty($query_items['action'])) return false; |
|
284
|
|
|
// looks like non-download entry point - allow only specific entry points |
|
285
|
|
|
if(!empty($query_items['entryPoint']) && !in_array($query_items['entryPoint'], array('download', 'image', 'getImage'))) { |
|
286
|
|
|
return false; |
|
287
|
|
|
} |
|
288
|
|
|
|
|
289
|
|
|
return true; |
|
290
|
|
|
} |
|
291
|
|
|
} |
|
292
|
|
|
|
adamjakab /
SuiteCRM
Loading history...
Having each class in a dedicated file usually plays nice with PSR autoloaders and is therefore a well established practice. If you use other autoloaders, you might not want to follow this rule.