This file is indexed.

/usr/share/php/Net/LDAP/Util.php is in php-net-ldap 1:1.1.5-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
/**
* Util.php
*
* PHP version 4, 5
*
* @category  Net
* @package   Net_LDAP
* @author    Tarjej Huse <tarjei@bergfald.no>
* @author    Jan Wagner <wagner@netsols.de>
* @author    Del <del@babel.com.au>
* @author    Benedikt Hallinger <beni@php.net>
* @copyright 2003-2007 Tarjej Huse, Jan Wagner, Del Elson, Benedikt Hallinger
* @license   http://www.gnu.org/copyleft/lesser.html LGPL
* @version   CVS: $Id: Util.php,v 1.29 2008/10/26 15:31:06 clockwerx Exp $
* @link      http://pear.php.net/package/Net_LDAP/
*/
require_once 'PEAR.php';

/**
* Utility Class for Net_LDAP
*
* This class servers some functionality to the other classes of Net_LDAP but most of
* the methods can be used separately as well.
*
* @category Net
* @package  Net_LDAP
* @author   Benedikt Hallinger <beni@php.net>
* @license  http://www.gnu.org/copyleft/lesser.html LGPL
* @link     http://pear.php.net/package/Net_LDAP/
*/
class Net_LDAP_Util extends PEAR
{
    /**
    * Private empty Constructur
    *
    * @access private
    */
    function Net_LDAP_Util()
    {
         // We do nothing here, since all methods can be called statically.
         // In Net_LDAP <= 0.7, we needed a instance of Util, because
         // it was possible to do utf8 encoding and decoding, but this
         // has been moved to the LDAP class. The constructor remains only
         // here to document the downward compatibility of creating a instance.
    }

    /**
    * Explodes the given DN into its elements
    *
    * {@link http://www.ietf.org/rfc/rfc2253.txt RFC 2253} says, a Distinguished Name is a sequence
    * of Relative Distinguished Names (RDNs), which themselves
    * are sets of Attributes. For each RDN a array is constructed where the RDN part is stored.
    *
    * For example, the DN 'OU=Sales+CN=J. Smith,DC=example,DC=net' is exploded to:
    * <kbd>array( [0] => array([0] => 'OU=Sales', [1] => 'CN=J. Smith'), [2] => 'DC=example', [3] => 'DC=net' )</kbd>
    *
    * [NOT IMPLEMENTED] DNs might also contain values, which are the bytes of the BER encoding of
    * the X.500 AttributeValue rather than some LDAP string syntax. These values are hex-encoded
    * and prefixed with a #. To distinguish such BER values, ldap_explode_dn uses references to
    * the actual values, e.g. '1.3.6.1.4.1.1466.0=#04024869,DC=example,DC=com' is exploded to:
    * [ { '1.3.6.1.4.1.1466.0' => "\004\002Hi" }, { 'DC' => 'example' }, { 'DC' => 'com' } ];
    * See {@link http://www.vijaymukhi.com/vmis/berldap.htm} for more information on BER.
    *
    *  It also performs the following operations on the given DN:
    *   - Unescape "\" followed by ",", "+", """, "\", "<", ">", ";", "#", "=", " ", or a hexpair
    *     and strings beginning with "#".
    *   - Removes the leading 'OID.' characters if the type is an OID instead of a name.
    *   - If an RDN contains multiple parts, the parts are re-ordered so that the attribute type names are in alphabetical order.
    *
    * OPTIONS is a list of name/value pairs, valid options are:
    *   casefold    Controls case folding of attribute types names.
    *               Attribute values are not affected by this option.
    *               The default is to uppercase. Valid values are:
    *               lower        Lowercase attribute types names.
    *               upper        Uppercase attribute type names. This is the default.
    *               none         Do not change attribute type names.
    *   reverse     If TRUE, the RDN sequence is reversed.
    *   onlyvalues  If TRUE, then only attributes values are returned ('foo' instead of 'cn=foo')
    *

    * @param string $dn      The DN that should be exploded
    * @param array  $options Options to use
    *
    * @static
    * @return array   Parts of the exploded DN
    * @todo implement BER
    */
    function ldap_explode_dn($dn, $options = array('casefold' => 'upper'))
    {
        if (!isset($options['onlyvalues'])) {
            $options['onlyvalues'] = false;
        }

        if (!isset($options['reverse'])) {
            $options['reverse'] = false;
        }

        if (!isset($options['casefold'])) {
            $options['casefold'] = 'upper';
        }

        // Escaping of DN and stripping of "OID."
        $dn = Net_LDAP_Util::canonical_dn($dn, array('casefold' => $options['casefold']));

        // splitting the DN
        $dn_array = preg_split('/(?<=[^\\\\]),/', $dn);

        // construct subarrays for multivalued RDNs and unescape DN value
        // also convert to output format and apply casefolding
        foreach ($dn_array as $key => $value) {
            $value_u = Net_LDAP_Util::unescape_dn_value($value);
            $rdns    = Net_LDAP_Util::split_rdn_multival($value_u[0]);
            if (count($rdns) > 1) {
                // MV RDN!
                foreach ($rdns as $subrdn_k => $subrdn_v) {
                    // Casefolding
                    if ($options['casefold'] == 'upper') {
                        $subrdn_v = preg_replace("/^(\w+=)/e", "''.strtoupper('\\1').''", $subrdn_v);
                    }

                    if ($options['casefold'] == 'lower') {
                        $subrdn_v = preg_replace("/^(\w+=)/e", "''.strtolower('\\1').''", $subrdn_v);
                    }

                    if ($options['onlyvalues']) {
                        preg_match('/(.+?)(?<!\\\\)=(.+)/', $subrdn_v, $matches);
                        $rdn_ocl         = $matches[1];
                        $rdn_val         = $matches[2];
                        $unescaped       = Net_LDAP_Util::unescape_dn_value($rdn_val);
                        $rdns[$subrdn_k] = $unescaped[0];
                    } else {
                        $unescaped = Net_LDAP_Util::unescape_dn_value($subrdn_v);

                        $rdns[$subrdn_k] = $unescaped[0];
                    }
                }

                $dn_array[$key] = $rdns;
            } else {
                // normal RDN

                // Casefolding
                if ($options['casefold'] == 'upper') {
                    $value = preg_replace("/^(\w+=)/e", "''.strtoupper('\\1').''", $value);
                }

                if ($options['casefold'] == 'lower') {
                    $value = preg_replace("/^(\w+=)/e", "''.strtolower('\\1').''", $value);
                }

                if ($options['onlyvalues']) {
                    preg_match('/(.+?)(?<!\\\\)=(.+)/', $value, $matches);
                    $dn_ocl         = $matches[1];
                    $dn_val         = $matches[2];
                    $unescaped      = Net_LDAP_Util::unescape_dn_value($dn_val);
                    $dn_array[$key] = $unescaped[0];
                } else {
                    $unescaped = Net_LDAP_Util::unescape_dn_value($value);

                    $dn_array[$key] = $unescaped[0];
                }
            }
        }

        if ($options['reverse']) {
            return array_reverse($dn_array);
        } else {
            return $dn_array;
        }
    }

    /**
    * Escapes a DN value according to RFC 2253
    *
    * Escapes the given VALUES according to RFC 2253 so that they can be safely used in LDAP DNs.
    * The characters ",", "+", """, "\", "<", ">", ";", "#", "=" with a special meaning in RFC 2252
    * are preceeded by ba backslash. Control characters with an ASCII code < 32 are represented as \hexpair.
    * Finally all leading and trailing spaces are converted to sequences of \20.
    *
    * @param array $values An array containing the DN values that should be escaped
    *
    * @static
    * @return array The array $values, but escaped
    */
    function escape_dn_value($values = array())
    {
        // Parameter validation
        if (!is_array($values)) {
            $values = array($values);
        }

        foreach ($values as $key => $val) {
            // Escaping of filter meta characters
            $val = str_replace('\\', '\\\\', $val);
            $val = str_replace(',', '\,', $val);
            $val = str_replace('+', '\+', $val);
            $val = str_replace('"', '\"', $val);
            $val = str_replace('<', '\<', $val);
            $val = str_replace('>', '\>', $val);
            $val = str_replace(';', '\;', $val);
            $val = str_replace('#', '\#', $val);
            $val = str_replace('=', '\=', $val);

            // ASCII < 32 escaping
            $val = Net_LDAP_Util::asc2hex32($val);

            // Convert all leading and trailing spaces to sequences of \20.
            if (preg_match('/^(\s*)(.+?)(\s*)$/', $val, $matches)) {
                $val = $matches[2];
                for ($i = 0; $i < strlen($matches[1]); $i++) {
                    $val = '\20'.$val;
                }
                for ($i = 0; $i < strlen($matches[3]); $i++) {
                    $val = $val.'\20';
                }
            }

            if (null === $val) {
                $val = '\0';  // apply escaped "null" if string is empty
            }

            $values[$key] = $val;
        }

        return $values;
    }

    /**
    * Undoes the conversion done by escape_dn_value().
    *
    * Any escape sequence starting with a baskslash - hexpair or special character -
    * will be transformed back to the corresponding character.
    *
    * @param array $values Array of DN Values
    *
    * @return array Same as $values, but unescaped
    * @static
    */
    function unescape_dn_value($values = array())
    {
        // Parameter validation
        if (!is_array($values)) {
            $values = array($values);
        }

        foreach ($values as $key => $val) {
            // strip slashes from special chars
            $val = str_replace('\\\\', '\\', $val);

            $val = str_replace('\,', ',', $val);
            $val = str_replace('\+', '+', $val);
            $val = str_replace('\"', '"', $val);
            $val = str_replace('\<', '<', $val);
            $val = str_replace('\>', '>', $val);
            $val = str_replace('\;', ';', $val);
            $val = str_replace('\#', '#', $val);
            $val = str_replace('\=', '=', $val);

            // Translate hex code into ascii
            $values[$key] = Net_LDAP_Util::hex2asc($val);
        }

        return $values;
    }

    /**
    * Returns the given DN in a canonical form
    *
    * Returns false if DN is not a valid Distinguished Name.
    * DN can either be a string or an array
    * as returned by ldap_explode_dn, which is useful when constructing a DN.
    * The DN array may have be indexed (each array value is a OCL=VALUE pair)
    * or associative (array key is OCL and value is VALUE).
    *
    * It performs the following operations on the given DN:
    *     - Removes the leading 'OID.' characters if the type is an OID instead of a name.
    *     - Escapes all RFC 2253 special characters (",", "+", """, "\", "<", ">", ";", "#", "="), slashes ("/"), and any other character where the ASCII code is < 32 as \hexpair.
    *     - Converts all leading and trailing spaces in values to be \20.
    *     - If an RDN contains multiple parts, the parts are re-ordered so that the attribute type names are in alphabetical order.
    *
    * OPTIONS is a list of name/value pairs, valid options are:
    *     casefold    Controls case folding of attribute type names.
    *                 Attribute values are not affected by this option. The default is to uppercase.
    *                 Valid values are:
    *                 lower        Lowercase attribute type names.
    *                 upper        Uppercase attribute type names. This is the default.
    *                 none         Do not change attribute type names.
    *     [NOT IMPLEMENTED] mbcescape   If TRUE, characters that are encoded as a multi-octet UTF-8 sequence will be escaped as \(hexpair){2,*}.
    *     reverse     If TRUE, the RDN sequence is reversed.
    *     separator   Separator to use between RDNs. Defaults to comma (',').
    *
    * Note: The empty string "" is a valid DN, so be sure not to do a "$can_dn == false" test,
    *       because an empty string evaluates to false. Use the "===" operator instead.
    *
    * @param array|string $dn      The DN
    * @param array        $options Options to use
    *
    * @static
    * @return false|string The canonical DN or FALSE
    * @todo implement option mbcescape
    */
    function canonical_dn($dn, $options = array('casefold' => 'upper', 'separator' => ','))
    {
        if ($dn === '') {
            return $dn;  // empty DN is valid!
        }

        // options check
        if (!isset($options['reverse'])) {
            $options['reverse'] = false;
        } else {
            $options['reverse'] = true;
        }
        if (!isset($options['casefold'])) {
            $options['casefold'] = 'upper';
        }
        if (!isset($options['separator'])) {
            $options['separator'] = ',';
        }


        if (!is_array($dn)) {
            // It is not clear to me if the perl implementation splits by the user defined
            // separator or if it just uses this separator to construct the new DN
            $dn = preg_split('/(?<=[^\\\\])'.$options['separator'].'/', $dn);

            // clear wrong splitting (possibly we have split too much)
            $dn = Net_LDAP_Util::_correct_dn_splitting($dn, $options['separator']);
        } else {
            // Is array, check, if the array is indexed or associative
            $assoc = false;
            foreach ($dn as $dn_key => $dn_part) {
                if (!is_int($dn_key)) {
                    $assoc = true;
                }
            }
            // convert to indexed, if associative array detected
            if ($assoc) {
                $newdn = array();
                foreach ($dn as $dn_key => $dn_part) {
                    if (is_array($dn_part)) {
                        ksort($dn_part, SORT_STRING); // we assume here, that the rdn parts are also associative
                        $newdn[] = $dn_part;  // copy array as-is, so we can resolve it later
                    } else {
                        $newdn[] = $dn_key.'='.$dn_part;
                    }
                }
                $dn =& $newdn;
            }
        }

        // Escaping and casefolding
        foreach ($dn as $pos => $dnval) {
            if (is_array($dnval)) {
                // subarray detected, this means very surely, that we had
                // a multivalued dn part, which must be resolved
                $dnval_new = '';
                foreach ($dnval as $subkey => $subval) {
                    // build RDN part
                    if (!is_int($subkey)) {
                        $subval = $subkey.'='.$subval;
                    }
                    $subval_processed = Net_LDAP_Util::canonical_dn($subval);
                    if (false === $subval_processed) {
                        return false;
                    }
                    $dnval_new .= $subval_processed.'+';
                }
                $dn[$pos] = substr($dnval_new, 0, -1); // store RDN part, strip last plus
            } else {
                // try to split multivalued RDNS into array
                $rdns = Net_LDAP_Util::split_rdn_multival($dnval);
                if (count($rdns) > 1) {
                    // Multivalued RDN was detected!
                    // The RDN value is expected to be correctly split by split_rdn_multival().
                    // It's time to sort the RDN and build the DN!
                    $rdn_string = '';
                    sort($rdns, SORT_STRING); // Sort RDN keys alphabetically
                    foreach ($rdns as $rdn) {
                        $subval_processed = Net_LDAP_Util::canonical_dn($rdn);
                        if (false === $subval_processed) {
                            return false;
                        }
                        $rdn_string .= $subval_processed.'+';
                    }

                    $dn[$pos] = substr($rdn_string, 0, -1); // store RDN part, strip last plus

                } else {
                    // no multivalued RDN!
                    // split at first unescaped "="
                    $dn_comp = preg_split('/(?<=[^\\\\])=/', $rdns[0], 2);
                    $ocl     = ltrim($dn_comp[0]);  // trim left whitespaces 'cause of "cn=foo, l=bar" syntax (whitespace after comma)
                    $val     = $dn_comp[1];

                    // strip 'OID.', otherwise apply casefolding and escaping
                    if (substr(strtolower($ocl), 0, 4) == 'oid.') {
                        $ocl = substr($ocl, 4);
                    } else {
                        if ($options['casefold'] == 'upper') { 
                            $ocl = strtoupper($ocl); 
                        }
                        if ($options['casefold'] == 'lower') {
                            $ocl = strtolower($ocl); 
                        }
                        $ocl = Net_LDAP_Util::escape_dn_value(array($ocl));
                        $ocl = $ocl[0];
                    }

                    // escaping of dn-value
                    $val = Net_LDAP_Util::escape_dn_value(array($val));
                    $val = str_replace('/', '\/', $val[0]);

                    $dn[$pos] = $ocl.'='.$val;
                }
            }
        }

        if ($options['reverse']) {
            $dn = array_reverse($dn);
        }

        return implode($options['separator'], $dn);
    }

    /**
    * Escapes the given VALUES according to RFC 2254 so that they can be safely used in LDAP filters.
    *
    * Any control characters with an ACII code < 32 as well as the characters with special meaning in
    * LDAP filters "*", "(", ")", and "\" (the backslash) are converted into the representation of a
    * backslash followed by two hex digits representing the hexadecimal value of the character.
    *
    * @param array $values Array of values to escape
    *
    * @static
    * @return array Array $values, but escaped
    */
    function escape_filter_value($values = array())
    {
        // Parameter validation
        if (!is_array($values)) {
            $values = array($values);
        }

        foreach ($values as $key => $val) {
            // Escaping of filter meta characters
            $val = str_replace('\\', '\5c', $val);
            $val = str_replace('*', '\2a', $val);
            $val = str_replace('(', '\28', $val);
            $val = str_replace(')', '\29', $val);

            // ASCII < 32 escaping
            $val = Net_LDAP_Util::asc2hex32($val);

            if (null === $val) {
                $val = '\0';  // apply escaped "null" if string is empty
            }

            $values[$key] = $val;
        }

        return $values;
    }

    /**
    * Undoes the conversion done by {@link escape_filter_value()}.
    *
    * Converts any sequences of a backslash followed by two 
    * hex digits into the corresponding character.
    *
    * @param array $values Array of values to escape
    *
    * @static
    * @return array Array $values, but unescaped
    */
    function unescape_filter_value($values = array())
    {
        // Parameter validation
        if (!is_array($values)) {
            $values = array($values);
        }

        foreach ($values as $key => $value) {
            // Translate hex code into ascii
            $values[$key] = Net_LDAP_Util::hex2asc($value);
        }

        return $values;
    }

    /**
    * Converts all ASCII chars < 32 to "\HEX"
    *
    * @param string $string String to convert
    *
    * @static
    * @return string
    */
    function asc2hex32($string)
    {
        for ($i = 0; $i < strlen($string); $i++) {
            $char = substr($string, $i, 1);
            if (ord($char) < 32) {
                $hex = dechex(ord($char));
                if (strlen($hex) == 1) {
                    $hex = '0'.$hex;
                }
                $string = str_replace($char, '\\'.$hex, $string);
            }
        }
        return $string;
    }

    /**
    * Converts all Hex expressions ("\HEX") to their original ASCII characters
    *
    * @param string $string String to convert
    *
    * @static
    * @author beni@php.net, heavily based on work from DavidSmith@byu.net
    * @return string
    */
    function hex2asc($string)
    {
        $string = preg_replace("/\\\([0-9A-Fa-f]{2})/e", "''.chr(hexdec('\\1')).''", $string);
        return $string;
    }

    /**
    * Split an multivalued RDN value into an Array
    *
    * A RDN can contain multiple values, spearated by a plus sign.
    * This function returns each separate ocl=value pair of the RDN part.
    *
    * If no multivalued RDN is detected, a array containing only
    * the original rdn part is returned.
    *
    * For example, the multivalued RDN 'OU=Sales+CN=J. Smith' is exploded to:
    * <kbd>array([0] => 'OU=Sales', [1] => 'CN=J. Smith')</kbd>
    *
    * The method trys to be smart if it encounters unescaped "+" characters, but may fail,
    * so ensure escaped "+"es in attr names and attr values.
    *
    * [BUG] If you use string mode and have a multivalued RDN with unescaped plus characters
    *       and there is a unescaped plus sign at the end of an value followed by an
    *       attribute name containing an unescaped plus, then you will get wrong splitting:
    *         $rdn = 'OU=Sales+C+N=J. Smith';
    *       returns:
    *         array('OU=Sales+C', 'N=J. Smith');
    *       The "C+" is treaten as value of the first pair instead as attr name of the second pair.
    *       To prevent this, escape correctly.
    *
    * @param string $rdn Part of an (multivalued) escaped RDN (eg. ou=foo OR ou=foo+cn=bar)
    *
    * @static
    * @return array Array with the components of the multivalued RDN or Error
    */
    function split_rdn_multival($rdn)
    {
        $rdns = preg_split('/(?<!\\\\)\+/', $rdn);
        $rdns = Net_LDAP_Util::_correct_dn_splitting($rdns, '+');
        return array_values($rdns);
    }

    /**
    * Splits a attribute=value syntax into an array
    *
    * The split will occur at the first unescaped '=' character.
    *
    * @param string $attr Attribute and Value Syntax
    *
    * @return array Indexed array: 0=attribute name, 1=attribute value
    */
    function split_attribute_string($attr)
    {
        return preg_split('/(?<!\\\\)=/', $attr, 2);
    }

    /**
    * Corrects splitting of dn parts
    *
    * @param array $dn        Raw DN array
    * @param array $separator Separator that was used when splitting
    *
    * @return array Corrected array
    * @access private
    */
    function _correct_dn_splitting($dn = array(), $separator = ',')
    {
        foreach ($dn as $key => $dn_value) {
            $dn_value = $dn[$key]; // refresh value (foreach caches!)
            // if the dn_value is not in attr=value format, then we had an
            // unescaped separator character inside the attr name or the value.
            // We assume, that it was the attribute value.
            // [TODO] To solve this, we might ask the schema. Keep in mind, that UTIL class
            //        must remain independent from the other classes or connections.
            if (!preg_match('/.+(?<!\\\\)=.+/', $dn_value)) {
                unset($dn[$key]);
                if (array_key_exists($key-1, $dn)) {
                    $dn[$key-1] = $dn[$key-1].$separator.$dn_value; // append to previous attr value
                } else {
                    $dn[$key+1] = $dn_value.$separator.$dn[$key+1]; // first element: prepend to next attr name
                }
            }
        }
        return array_values($dn);
    }
}

?>