This file is indexed.

/usr/share/php/Twig/Template.php is in php-twig 1.16.2-1+deb8u1.

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
<?php

/*
 * This file is part of Twig.
 *
 * (c) 2009 Fabien Potencier
 * (c) 2009 Armin Ronacher
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Default base class for compiled templates.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
abstract class Twig_Template implements Twig_TemplateInterface
{
    protected static $cache = array();

    protected $parent;
    protected $parents;
    protected $env;
    protected $blocks;
    protected $traits;

    /**
     * Constructor.
     *
     * @param Twig_Environment $env A Twig_Environment instance
     */
    public function __construct(Twig_Environment $env)
    {
        $this->env = $env;
        $this->blocks = array();
        $this->traits = array();
    }

    /**
     * Returns the template name.
     *
     * @return string The template name
     */
    abstract public function getTemplateName();

    /**
     * {@inheritdoc}
     */
    public function getEnvironment()
    {
        return $this->env;
    }

    /**
     * Returns the parent template.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @return Twig_TemplateInterface|false The parent template or false if there is no parent
     */
    public function getParent(array $context)
    {
        if (null !== $this->parent) {
            return $this->parent;
        }

        $parent = $this->doGetParent($context);
        if (false === $parent) {
            return false;
        } elseif ($parent instanceof Twig_Template) {
            $name = $parent->getTemplateName();
            $this->parents[$name] = $parent;
            $parent = $name;
        } elseif (!isset($this->parents[$parent])) {
            $this->parents[$parent] = $this->env->loadTemplate($parent);
        }

        return $this->parents[$parent];
    }

    protected function doGetParent(array $context)
    {
        return false;
    }

    public function isTraitable()
    {
        return true;
    }

    /**
     * Displays a parent block.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @param string $name    The block name to display from the parent
     * @param array  $context The context
     * @param array  $blocks  The current set of blocks
     */
    public function displayParentBlock($name, array $context, array $blocks = array())
    {
        $name = (string) $name;

        if (isset($this->traits[$name])) {
            $this->traits[$name][0]->displayBlock($name, $context, $blocks, false);
        } elseif (false !== $parent = $this->getParent($context)) {
            $parent->displayBlock($name, $context, $blocks, false);
        } else {
            throw new Twig_Error_Runtime(sprintf('The template has no parent and no traits defining the "%s" block', $name), -1, $this->getTemplateName());
        }
    }

    /**
     * Displays a block.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @param string  $name      The block name to display
     * @param array   $context   The context
     * @param array   $blocks    The current set of blocks
     * @param bool    $useBlocks Whether to use the current set of blocks
     */
    public function displayBlock($name, array $context, array $blocks = array(), $useBlocks = true)
    {
        $name = (string) $name;

        if ($useBlocks && isset($blocks[$name])) {
            $template = $blocks[$name][0];
            $block = $blocks[$name][1];
        } elseif (isset($this->blocks[$name])) {
            $template = $this->blocks[$name][0];
            $block = $this->blocks[$name][1];
        } else {
            $template = null;
            $block = null;
        }

        if (null !== $template) {
            // avoid RCEs when sandbox is enabled
            if (!$template instanceof Twig_Template) {
                throw new \LogicException('A block must be a method on a Twig_Template instance.');
            }

            try {
                $template->$block($context, $blocks);
            } catch (Twig_Error $e) {
                throw $e;
            } catch (Exception $e) {
                throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $template->getTemplateName(), $e);
            }
        } elseif (false !== $parent = $this->getParent($context)) {
            $parent->displayBlock($name, $context, array_merge($this->blocks, $blocks), false);
        }
    }

    /**
     * Renders a parent block.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @param string $name    The block name to render from the parent
     * @param array  $context The context
     * @param array  $blocks  The current set of blocks
     *
     * @return string The rendered block
     */
    public function renderParentBlock($name, array $context, array $blocks = array())
    {
        ob_start();
        $this->displayParentBlock($name, $context, $blocks);

        return ob_get_clean();
    }

    /**
     * Renders a block.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @param string  $name      The block name to render
     * @param array   $context   The context
     * @param array   $blocks    The current set of blocks
     * @param bool    $useBlocks Whether to use the current set of blocks
     *
     * @return string The rendered block
     */
    public function renderBlock($name, array $context, array $blocks = array(), $useBlocks = true)
    {
        ob_start();
        $this->displayBlock($name, $context, $blocks, $useBlocks);

        return ob_get_clean();
    }

    /**
     * Returns whether a block exists or not.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * This method does only return blocks defined in the current template
     * or defined in "used" traits.
     *
     * It does not return blocks from parent templates as the parent
     * template name can be dynamic, which is only known based on the
     * current context.
     *
     * @param string $name The block name
     *
     * @return bool    true if the block exists, false otherwise
     */
    public function hasBlock($name)
    {
        return isset($this->blocks[(string) $name]);
    }

    /**
     * Returns all block names.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @return array An array of block names
     *
     * @see hasBlock
     */
    public function getBlockNames()
    {
        return array_keys($this->blocks);
    }

    /**
     * Returns all blocks.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @return array An array of blocks
     *
     * @see hasBlock
     */
    public function getBlocks()
    {
        return $this->blocks;
    }

    /**
     * {@inheritdoc}
     */
    public function display(array $context, array $blocks = array())
    {
        $this->displayWithErrorHandling($this->env->mergeGlobals($context), array_merge($this->blocks, $blocks));
    }

    /**
     * {@inheritdoc}
     */
    public function render(array $context)
    {
        $level = ob_get_level();
        ob_start();
        try {
            $this->display($context);
        } catch (Exception $e) {
            while (ob_get_level() > $level) {
                ob_end_clean();
            }

            throw $e;
        }

        return ob_get_clean();
    }

    protected function displayWithErrorHandling(array $context, array $blocks = array())
    {
        try {
            $this->doDisplay($context, $blocks);
        } catch (Twig_Error $e) {
            if (!$e->getTemplateFile()) {
                $e->setTemplateFile($this->getTemplateName());
            }

            // this is mostly useful for Twig_Error_Loader exceptions
            // see Twig_Error_Loader
            if (false === $e->getTemplateLine()) {
                $e->setTemplateLine(-1);
                $e->guess();
            }

            throw $e;
        } catch (Exception $e) {
            throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $this->getTemplateName(), $e);
        }
    }

    /**
     * Auto-generated method to display the template with the given context.
     *
     * @param array $context An array of parameters to pass to the template
     * @param array $blocks  An array of blocks to pass to the template
     */
    abstract protected function doDisplay(array $context, array $blocks = array());

    /**
     * Returns a variable from the context.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * This method should not be overridden in a sub-class as this is an
     * implementation detail that has been introduced to optimize variable
     * access for versions of PHP before 5.4. This is not a way to override
     * the way to get a variable value.
     *
     * @param array   $context           The context
     * @param string  $item              The variable to return from the context
     * @param bool    $ignoreStrictCheck Whether to ignore the strict variable check or not
     *
     * @return The content of the context variable
     *
     * @throws Twig_Error_Runtime if the variable does not exist and Twig is running in strict mode
     */
    final protected function getContext($context, $item, $ignoreStrictCheck = false)
    {
        if (!array_key_exists($item, $context)) {
            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
                return;
            }

            throw new Twig_Error_Runtime(sprintf('Variable "%s" does not exist', $item), -1, $this->getTemplateName());
        }

        return $context[$item];
    }

    /**
     * Returns the attribute value for a given array/object.
     *
     * @param mixed   $object            The object or array from where to get the item
     * @param mixed   $item              The item to get from the array or object
     * @param array   $arguments         An array of arguments to pass if the item is an object method
     * @param string  $type              The type of attribute (@see Twig_Template constants)
     * @param bool    $isDefinedTest     Whether this is only a defined check
     * @param bool    $ignoreStrictCheck Whether to ignore the strict attribute check or not
     *
     * @return mixed The attribute value, or a Boolean when $isDefinedTest is true, or null when the attribute is not set and $ignoreStrictCheck is true
     *
     * @throws Twig_Error_Runtime if the attribute does not exist and Twig is running in strict mode and $isDefinedTest is false
     */
    protected function getAttribute($object, $item, array $arguments = array(), $type = Twig_Template::ANY_CALL, $isDefinedTest = false, $ignoreStrictCheck = false)
    {
        // array
        if (Twig_Template::METHOD_CALL !== $type) {
            $arrayItem = is_bool($item) || is_float($item) ? (int) $item : $item;

            if ((is_array($object) && array_key_exists($arrayItem, $object))
                || ($object instanceof ArrayAccess && isset($object[$arrayItem]))
            ) {
                if ($isDefinedTest) {
                    return true;
                }

                return $object[$arrayItem];
            }

            if (Twig_Template::ARRAY_CALL === $type || !is_object($object)) {
                if ($isDefinedTest) {
                    return false;
                }

                if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
                    return;
                }

                if ($object instanceof ArrayAccess) {
                    $message = sprintf('Key "%s" in object with ArrayAccess of class "%s" does not exist', $arrayItem, get_class($object));
                } elseif (is_object($object)) {
                    $message = sprintf('Impossible to access a key "%s" on an object of class "%s" that does not implement ArrayAccess interface', $item, get_class($object));
                } elseif (is_array($object)) {
                    if (empty($object)) {
                        $message = sprintf('Key "%s" does not exist as the array is empty', $arrayItem);
                    } else {
                        $message = sprintf('Key "%s" for array with keys "%s" does not exist', $arrayItem, implode(', ', array_keys($object)));
                    }
                } elseif (Twig_Template::ARRAY_CALL === $type) {
                    $message = sprintf('Impossible to access a key ("%s") on a %s variable ("%s")', $item, gettype($object), $object);
                } else {
                    $message = sprintf('Impossible to access an attribute ("%s") on a %s variable ("%s")', $item, gettype($object), $object);
                }

                throw new Twig_Error_Runtime($message, -1, $this->getTemplateName());
            }
        }

        if (!is_object($object)) {
            if ($isDefinedTest) {
                return false;
            }

            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
                return;
            }

            throw new Twig_Error_Runtime(sprintf('Impossible to invoke a method ("%s") on a %s variable ("%s")', $item, gettype($object), $object), -1, $this->getTemplateName());
        }

        // object property
        if (Twig_Template::METHOD_CALL !== $type && !$object instanceof self) { // Twig_Template does not have public properties, and we don't want to allow access to internal ones
            if (isset($object->$item) || array_key_exists((string) $item, $object)) {
                if ($isDefinedTest) {
                    return true;
                }

                if ($this->env->hasExtension('sandbox')) {
                    $this->env->getExtension('sandbox')->checkPropertyAllowed($object, $item);
                }

                return $object->$item;
            }
        }

        $class = get_class($object);

        // object method
        if (!isset(self::$cache[$class]['methods'])) {
            // get_class_methods returns all methods accessible in the scope, but we only want public ones to be accessible in templates
            if ($object instanceof self) {
                $ref = new ReflectionClass($class);
                $methods = array();

                foreach ($ref->getMethods(ReflectionMethod::IS_PUBLIC) as $refMethod) {
                    $methodName = strtolower($refMethod->name);

                    // Accessing the environment from templates is forbidden to prevent untrusted changes to the environment
                    if ('getenvironment' !== $methodName) {
                        $methods[$methodName] = true;
                    }
                }

                self::$cache[$class]['methods'] = $methods;
            } else {
                self::$cache[$class]['methods'] = array_change_key_case(array_flip(get_class_methods($object)));
            }
        }

        $call = false;
        $lcItem = strtolower($item);
        if (isset(self::$cache[$class]['methods'][$lcItem])) {
            $method = (string) $item;
        } elseif (isset(self::$cache[$class]['methods']['get'.$lcItem])) {
            $method = 'get'.$item;
        } elseif (isset(self::$cache[$class]['methods']['is'.$lcItem])) {
            $method = 'is'.$item;
        } elseif (isset(self::$cache[$class]['methods']['__call'])) {
            $method = (string) $item;
            $call = true;
        } else {
            if ($isDefinedTest) {
                return false;
            }

            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
                return;
            }

            throw new Twig_Error_Runtime(sprintf('Method "%s" for object "%s" does not exist', $item, get_class($object)), -1, $this->getTemplateName());
        }

        if ($isDefinedTest) {
            return true;
        }

        if ($this->env->hasExtension('sandbox')) {
            $this->env->getExtension('sandbox')->checkMethodAllowed($object, $method);
        }

        // Some objects throw exceptions when they have __call, and the method we try
        // to call is not supported. If ignoreStrictCheck is true, we should return null.
        try {
            $ret = call_user_func_array(array($object, $method), $arguments);
        } catch (BadMethodCallException $e) {
            if ($call && ($ignoreStrictCheck || !$this->env->isStrictVariables())) {
                return;
            }
            throw $e;
        }

        // useful when calling a template method from a template
        // this is not supported but unfortunately heavily used in the Symfony profiler
        if ($object instanceof Twig_TemplateInterface) {
            return $ret === '' ? '' : new Twig_Markup($ret, $this->env->getCharset());
        }

        return $ret;
    }

    /**
     * This method is only useful when testing Twig. Do not use it.
     */
    public static function clearCache()
    {
        self::$cache = array();
    }
}