1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2014 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Rasmus Lerdorf <rasmus@php.net> |
16 | Derick Rethans <derick@php.net> |
17 | Pierre-A. Joye <pierre@php.net> |
18 | Ilia Alshanetsky <iliaa@php.net> |
19 +----------------------------------------------------------------------+
20 */
21
22 /* $Id: ad78b4a085153b8c7f4d6db5dc69df40e969c343 $ */
23
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #endif
27
28 #include "php_filter.h"
29
30 ZEND_DECLARE_MODULE_GLOBALS(filter)
31
32 #include "filter_private.h"
33
34 typedef struct filter_list_entry {
35 const char *name;
36 int id;
37 void (*function)(PHP_INPUT_FILTER_PARAM_DECL);
38 } filter_list_entry;
39
40 /* {{{ filter_list */
41 static const filter_list_entry filter_list[] = {
42 { "int", FILTER_VALIDATE_INT, php_filter_int },
43 { "boolean", FILTER_VALIDATE_BOOLEAN, php_filter_boolean },
44 { "float", FILTER_VALIDATE_FLOAT, php_filter_float },
45
46 { "validate_regexp", FILTER_VALIDATE_REGEXP, php_filter_validate_regexp },
47 { "validate_url", FILTER_VALIDATE_URL, php_filter_validate_url },
48 { "validate_email", FILTER_VALIDATE_EMAIL, php_filter_validate_email },
49 { "validate_ip", FILTER_VALIDATE_IP, php_filter_validate_ip },
50
51 { "string", FILTER_SANITIZE_STRING, php_filter_string },
52 { "stripped", FILTER_SANITIZE_STRING, php_filter_string },
53 { "encoded", FILTER_SANITIZE_ENCODED, php_filter_encoded },
54 { "special_chars", FILTER_SANITIZE_SPECIAL_CHARS, php_filter_special_chars },
55 { "full_special_chars", FILTER_SANITIZE_FULL_SPECIAL_CHARS, php_filter_full_special_chars },
56 { "unsafe_raw", FILTER_UNSAFE_RAW, php_filter_unsafe_raw },
57 { "email", FILTER_SANITIZE_EMAIL, php_filter_email },
58 { "url", FILTER_SANITIZE_URL, php_filter_url },
59 { "number_int", FILTER_SANITIZE_NUMBER_INT, php_filter_number_int },
60 { "number_float", FILTER_SANITIZE_NUMBER_FLOAT, php_filter_number_float },
61 { "magic_quotes", FILTER_SANITIZE_MAGIC_QUOTES, php_filter_magic_quotes },
62
63 { "callback", FILTER_CALLBACK, php_filter_callback },
64 };
65 /* }}} */
66
67 #ifndef PARSE_ENV
68 #define PARSE_ENV 4
69 #endif
70
71 #ifndef PARSE_SERVER
72 #define PARSE_SERVER 5
73 #endif
74
75 #ifndef PARSE_SESSION
76 #define PARSE_SESSION 6
77 #endif
78
79 static unsigned int php_sapi_filter(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC);
80 static unsigned int php_sapi_filter_init(TSRMLS_D);
81
82 /* {{{ arginfo */
83 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_input, 0, 0, 2)
84 ZEND_ARG_INFO(0, type)
85 ZEND_ARG_INFO(0, variable_name)
86 ZEND_ARG_INFO(0, filter)
87 ZEND_ARG_INFO(0, options)
88 ZEND_END_ARG_INFO()
89
90 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_var, 0, 0, 1)
91 ZEND_ARG_INFO(0, variable)
92 ZEND_ARG_INFO(0, filter)
93 ZEND_ARG_INFO(0, options)
94 ZEND_END_ARG_INFO()
95
96 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_input_array, 0, 0, 1)
97 ZEND_ARG_INFO(0, type)
98 ZEND_ARG_INFO(0, definition)
99 ZEND_ARG_INFO(0, add_empty)
100 ZEND_END_ARG_INFO()
101
102 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_var_array, 0, 0, 1)
103 ZEND_ARG_INFO(0, data)
104 ZEND_ARG_INFO(0, definition)
105 ZEND_ARG_INFO(0, add_empty)
106 ZEND_END_ARG_INFO()
107
108 ZEND_BEGIN_ARG_INFO(arginfo_filter_list, 0)
109 ZEND_END_ARG_INFO()
110
111 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_has_var, 0, 0, 2)
112 ZEND_ARG_INFO(0, type)
113 ZEND_ARG_INFO(0, variable_name)
114 ZEND_END_ARG_INFO()
115
116 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_id, 0, 0, 1)
117 ZEND_ARG_INFO(0, filtername)
118 ZEND_END_ARG_INFO()
119 /* }}} */
120
121 /* {{{ filter_functions[]
122 */
123 static const zend_function_entry filter_functions[] = {
124 PHP_FE(filter_input, arginfo_filter_input)
125 PHP_FE(filter_var, arginfo_filter_var)
126 PHP_FE(filter_input_array, arginfo_filter_input_array)
127 PHP_FE(filter_var_array, arginfo_filter_var_array)
128 PHP_FE(filter_list, arginfo_filter_list)
129 PHP_FE(filter_has_var, arginfo_filter_has_var)
130 PHP_FE(filter_id, arginfo_filter_id)
131 PHP_FE_END
132 };
133 /* }}} */
134
135 /* {{{ filter_module_entry
136 */
137 zend_module_entry filter_module_entry = {
138 #if ZEND_MODULE_API_NO >= 20010901
139 STANDARD_MODULE_HEADER,
140 #endif
141 "filter",
142 filter_functions,
143 PHP_MINIT(filter),
144 PHP_MSHUTDOWN(filter),
145 NULL,
146 PHP_RSHUTDOWN(filter),
147 PHP_MINFO(filter),
148 "0.11.0",
149 STANDARD_MODULE_PROPERTIES
150 };
151 /* }}} */
152
153 #ifdef COMPILE_DL_FILTER
154 ZEND_GET_MODULE(filter)
155 #endif
156
PHP_INI_MH(UpdateDefaultFilter)157 static PHP_INI_MH(UpdateDefaultFilter) /* {{{ */
158 {
159 int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
160
161 for (i = 0; i < size; ++i) {
162 if ((strcasecmp(new_value, filter_list[i].name) == 0)) {
163 IF_G(default_filter) = filter_list[i].id;
164 return SUCCESS;
165 }
166 }
167 /* Fallback to the default filter */
168 IF_G(default_filter) = FILTER_DEFAULT;
169 return SUCCESS;
170 }
171 /* }}} */
172
173 /* {{{ PHP_INI
174 */
PHP_INI_MH(OnUpdateFlags)175 static PHP_INI_MH(OnUpdateFlags)
176 {
177 if (!new_value) {
178 IF_G(default_filter_flags) = FILTER_FLAG_NO_ENCODE_QUOTES;
179 } else {
180 IF_G(default_filter_flags) = atoi(new_value);
181 }
182 return SUCCESS;
183 }
184
185 PHP_INI_BEGIN()
186 STD_PHP_INI_ENTRY("filter.default", "unsafe_raw", PHP_INI_SYSTEM|PHP_INI_PERDIR, UpdateDefaultFilter, default_filter, zend_filter_globals, filter_globals)
187 PHP_INI_ENTRY("filter.default_flags", NULL, PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateFlags)
PHP_INI_END()188 PHP_INI_END()
189 /* }}} */
190
191 static void php_filter_init_globals(zend_filter_globals *filter_globals) /* {{{ */
192 {
193 filter_globals->post_array = NULL;
194 filter_globals->get_array = NULL;
195 filter_globals->cookie_array = NULL;
196 filter_globals->env_array = NULL;
197 filter_globals->server_array = NULL;
198 filter_globals->session_array = NULL;
199 filter_globals->default_filter = FILTER_DEFAULT;
200 }
201 /* }}} */
202
203 #define PARSE_REQUEST 99
204
205 /* {{{ PHP_MINIT_FUNCTION
206 */
PHP_MINIT_FUNCTION(filter)207 PHP_MINIT_FUNCTION(filter)
208 {
209 ZEND_INIT_MODULE_GLOBALS(filter, php_filter_init_globals, NULL);
210
211 REGISTER_INI_ENTRIES();
212
213 REGISTER_LONG_CONSTANT("INPUT_POST", PARSE_POST, CONST_CS | CONST_PERSISTENT);
214 REGISTER_LONG_CONSTANT("INPUT_GET", PARSE_GET, CONST_CS | CONST_PERSISTENT);
215 REGISTER_LONG_CONSTANT("INPUT_COOKIE", PARSE_COOKIE, CONST_CS | CONST_PERSISTENT);
216 REGISTER_LONG_CONSTANT("INPUT_ENV", PARSE_ENV, CONST_CS | CONST_PERSISTENT);
217 REGISTER_LONG_CONSTANT("INPUT_SERVER", PARSE_SERVER, CONST_CS | CONST_PERSISTENT);
218 REGISTER_LONG_CONSTANT("INPUT_SESSION", PARSE_SESSION, CONST_CS | CONST_PERSISTENT);
219 REGISTER_LONG_CONSTANT("INPUT_REQUEST", PARSE_REQUEST, CONST_CS | CONST_PERSISTENT);
220
221 REGISTER_LONG_CONSTANT("FILTER_FLAG_NONE", FILTER_FLAG_NONE, CONST_CS | CONST_PERSISTENT);
222
223 REGISTER_LONG_CONSTANT("FILTER_REQUIRE_SCALAR", FILTER_REQUIRE_SCALAR, CONST_CS | CONST_PERSISTENT);
224 REGISTER_LONG_CONSTANT("FILTER_REQUIRE_ARRAY", FILTER_REQUIRE_ARRAY, CONST_CS | CONST_PERSISTENT);
225 REGISTER_LONG_CONSTANT("FILTER_FORCE_ARRAY", FILTER_FORCE_ARRAY, CONST_CS | CONST_PERSISTENT);
226 REGISTER_LONG_CONSTANT("FILTER_NULL_ON_FAILURE", FILTER_NULL_ON_FAILURE, CONST_CS | CONST_PERSISTENT);
227
228 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_INT", FILTER_VALIDATE_INT, CONST_CS | CONST_PERSISTENT);
229 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_BOOLEAN", FILTER_VALIDATE_BOOLEAN, CONST_CS | CONST_PERSISTENT);
230 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_FLOAT", FILTER_VALIDATE_FLOAT, CONST_CS | CONST_PERSISTENT);
231
232 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_REGEXP", FILTER_VALIDATE_REGEXP, CONST_CS | CONST_PERSISTENT);
233 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_URL", FILTER_VALIDATE_URL, CONST_CS | CONST_PERSISTENT);
234 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_EMAIL", FILTER_VALIDATE_EMAIL, CONST_CS | CONST_PERSISTENT);
235 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_IP", FILTER_VALIDATE_IP, CONST_CS | CONST_PERSISTENT);
236
237 REGISTER_LONG_CONSTANT("FILTER_DEFAULT", FILTER_DEFAULT, CONST_CS | CONST_PERSISTENT);
238 REGISTER_LONG_CONSTANT("FILTER_UNSAFE_RAW", FILTER_UNSAFE_RAW, CONST_CS | CONST_PERSISTENT);
239
240 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_STRING", FILTER_SANITIZE_STRING, CONST_CS | CONST_PERSISTENT);
241 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_STRIPPED", FILTER_SANITIZE_STRING, CONST_CS | CONST_PERSISTENT);
242 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_ENCODED", FILTER_SANITIZE_ENCODED, CONST_CS | CONST_PERSISTENT);
243 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_SPECIAL_CHARS", FILTER_SANITIZE_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
244 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_FULL_SPECIAL_CHARS", FILTER_SANITIZE_FULL_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
245 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_EMAIL", FILTER_SANITIZE_EMAIL, CONST_CS | CONST_PERSISTENT);
246 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_URL", FILTER_SANITIZE_URL, CONST_CS | CONST_PERSISTENT);
247 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_NUMBER_INT", FILTER_SANITIZE_NUMBER_INT, CONST_CS | CONST_PERSISTENT);
248 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_NUMBER_FLOAT", FILTER_SANITIZE_NUMBER_FLOAT, CONST_CS | CONST_PERSISTENT);
249 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_MAGIC_QUOTES", FILTER_SANITIZE_MAGIC_QUOTES, CONST_CS | CONST_PERSISTENT);
250
251 REGISTER_LONG_CONSTANT("FILTER_CALLBACK", FILTER_CALLBACK, CONST_CS | CONST_PERSISTENT);
252
253 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_OCTAL", FILTER_FLAG_ALLOW_OCTAL, CONST_CS | CONST_PERSISTENT);
254 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_HEX", FILTER_FLAG_ALLOW_HEX, CONST_CS | CONST_PERSISTENT);
255
256 REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_LOW", FILTER_FLAG_STRIP_LOW, CONST_CS | CONST_PERSISTENT);
257 REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_HIGH", FILTER_FLAG_STRIP_HIGH, CONST_CS | CONST_PERSISTENT);
258 REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_BACKTICK", FILTER_FLAG_STRIP_BACKTICK, CONST_CS | CONST_PERSISTENT);
259 REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_LOW", FILTER_FLAG_ENCODE_LOW, CONST_CS | CONST_PERSISTENT);
260 REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_HIGH", FILTER_FLAG_ENCODE_HIGH, CONST_CS | CONST_PERSISTENT);
261 REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_AMP", FILTER_FLAG_ENCODE_AMP, CONST_CS | CONST_PERSISTENT);
262 REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_ENCODE_QUOTES", FILTER_FLAG_NO_ENCODE_QUOTES, CONST_CS | CONST_PERSISTENT);
263 REGISTER_LONG_CONSTANT("FILTER_FLAG_EMPTY_STRING_NULL", FILTER_FLAG_EMPTY_STRING_NULL, CONST_CS | CONST_PERSISTENT);
264
265 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_FRACTION", FILTER_FLAG_ALLOW_FRACTION, CONST_CS | CONST_PERSISTENT);
266 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_THOUSAND", FILTER_FLAG_ALLOW_THOUSAND, CONST_CS | CONST_PERSISTENT);
267 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_SCIENTIFIC", FILTER_FLAG_ALLOW_SCIENTIFIC, CONST_CS | CONST_PERSISTENT);
268
269 REGISTER_LONG_CONSTANT("FILTER_FLAG_SCHEME_REQUIRED", FILTER_FLAG_SCHEME_REQUIRED, CONST_CS | CONST_PERSISTENT);
270 REGISTER_LONG_CONSTANT("FILTER_FLAG_HOST_REQUIRED", FILTER_FLAG_HOST_REQUIRED, CONST_CS | CONST_PERSISTENT);
271 REGISTER_LONG_CONSTANT("FILTER_FLAG_PATH_REQUIRED", FILTER_FLAG_PATH_REQUIRED, CONST_CS | CONST_PERSISTENT);
272 REGISTER_LONG_CONSTANT("FILTER_FLAG_QUERY_REQUIRED", FILTER_FLAG_QUERY_REQUIRED, CONST_CS | CONST_PERSISTENT);
273
274 REGISTER_LONG_CONSTANT("FILTER_FLAG_IPV4", FILTER_FLAG_IPV4, CONST_CS | CONST_PERSISTENT);
275 REGISTER_LONG_CONSTANT("FILTER_FLAG_IPV6", FILTER_FLAG_IPV6, CONST_CS | CONST_PERSISTENT);
276 REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_RES_RANGE", FILTER_FLAG_NO_RES_RANGE, CONST_CS | CONST_PERSISTENT);
277 REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_PRIV_RANGE", FILTER_FLAG_NO_PRIV_RANGE, CONST_CS | CONST_PERSISTENT);
278
279 sapi_register_input_filter(php_sapi_filter, php_sapi_filter_init TSRMLS_CC);
280
281 return SUCCESS;
282 }
283 /* }}} */
284
285 /* {{{ PHP_MSHUTDOWN_FUNCTION
286 */
PHP_MSHUTDOWN_FUNCTION(filter)287 PHP_MSHUTDOWN_FUNCTION(filter)
288 {
289 UNREGISTER_INI_ENTRIES();
290
291 return SUCCESS;
292 }
293 /* }}} */
294
295 /* {{{ PHP_RSHUTDOWN_FUNCTION
296 */
297 #define VAR_ARRAY_COPY_DTOR(a) \
298 if (IF_G(a)) { \
299 zval_ptr_dtor(&IF_G(a)); \
300 IF_G(a) = NULL; \
301 }
302
PHP_RSHUTDOWN_FUNCTION(filter)303 PHP_RSHUTDOWN_FUNCTION(filter)
304 {
305 VAR_ARRAY_COPY_DTOR(get_array)
306 VAR_ARRAY_COPY_DTOR(post_array)
307 VAR_ARRAY_COPY_DTOR(cookie_array)
308 VAR_ARRAY_COPY_DTOR(server_array)
309 VAR_ARRAY_COPY_DTOR(env_array)
310 VAR_ARRAY_COPY_DTOR(session_array)
311 return SUCCESS;
312 }
313 /* }}} */
314
315 /* {{{ PHP_MINFO_FUNCTION
316 */
PHP_MINFO_FUNCTION(filter)317 PHP_MINFO_FUNCTION(filter)
318 {
319 php_info_print_table_start();
320 php_info_print_table_row( 2, "Input Validation and Filtering", "enabled" );
321 php_info_print_table_row( 2, "Revision", "$Id: ad78b4a085153b8c7f4d6db5dc69df40e969c343 $");
322 php_info_print_table_end();
323
324 DISPLAY_INI_ENTRIES();
325 }
326 /* }}} */
327
php_find_filter(long id)328 static filter_list_entry php_find_filter(long id) /* {{{ */
329 {
330 int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
331
332 for (i = 0; i < size; ++i) {
333 if (filter_list[i].id == id) {
334 return filter_list[i];
335 }
336 }
337 /* Fallback to "string" filter */
338 for (i = 0; i < size; ++i) {
339 if (filter_list[i].id == FILTER_DEFAULT) {
340 return filter_list[i];
341 }
342 }
343 /* To shut up GCC */
344 return filter_list[0];
345 }
346 /* }}} */
347
php_sapi_filter_init(TSRMLS_D)348 static unsigned int php_sapi_filter_init(TSRMLS_D)
349 {
350 IF_G(get_array) = NULL;
351 IF_G(post_array) = NULL;
352 IF_G(cookie_array) = NULL;
353 IF_G(server_array) = NULL;
354 IF_G(env_array) = NULL;
355 IF_G(session_array) = NULL;
356 return SUCCESS;
357 }
358
php_zval_filter(zval ** value,long filter,long flags,zval * options,char * charset,zend_bool copy TSRMLS_DC)359 static void php_zval_filter(zval **value, long filter, long flags, zval *options, char* charset, zend_bool copy TSRMLS_DC) /* {{{ */
360 {
361 filter_list_entry filter_func;
362
363 filter_func = php_find_filter(filter);
364
365 if (!filter_func.id) {
366 /* Find default filter */
367 filter_func = php_find_filter(FILTER_DEFAULT);
368 }
369
370 if (copy) {
371 SEPARATE_ZVAL(value);
372 }
373
374 /* #49274, fatal error with object without a toString method
375 Fails nicely instead of getting a recovarable fatal error. */
376 if (Z_TYPE_PP(value) == IS_OBJECT) {
377 zend_class_entry *ce;
378
379 ce = Z_OBJCE_PP(value);
380 if (!ce->__tostring) {
381 ZVAL_FALSE(*value);
382 return;
383 }
384 }
385
386 /* Here be strings */
387 convert_to_string(*value);
388
389 filter_func.function(*value, flags, options, charset TSRMLS_CC);
390
391 if (
392 options && (Z_TYPE_P(options) == IS_ARRAY || Z_TYPE_P(options) == IS_OBJECT) &&
393 ((flags & FILTER_NULL_ON_FAILURE && Z_TYPE_PP(value) == IS_NULL) ||
394 (!(flags & FILTER_NULL_ON_FAILURE) && Z_TYPE_PP(value) == IS_BOOL && Z_LVAL_PP(value) == 0)) &&
395 zend_hash_exists(HASH_OF(options), "default", sizeof("default"))
396 ) {
397 zval **tmp;
398 if (zend_hash_find(HASH_OF(options), "default", sizeof("default"), (void **)&tmp) == SUCCESS) {
399 MAKE_COPY_ZVAL(tmp, *value);
400 }
401 }
402 }
403 /* }}} */
404
php_sapi_filter(int arg,char * var,char ** val,unsigned int val_len,unsigned int * new_val_len TSRMLS_DC)405 static unsigned int php_sapi_filter(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC) /* {{{ */
406 {
407 zval new_var, raw_var;
408 zval *array_ptr = NULL, *orig_array_ptr = NULL;
409 int retval = 0;
410
411 assert(*val != NULL);
412
413 #define PARSE_CASE(s,a,t) \
414 case s: \
415 if (!IF_G(a)) { \
416 ALLOC_ZVAL(array_ptr); \
417 array_init(array_ptr); \
418 INIT_PZVAL(array_ptr); \
419 IF_G(a) = array_ptr; \
420 } else { \
421 array_ptr = IF_G(a); \
422 } \
423 orig_array_ptr = PG(http_globals)[t]; \
424 break;
425
426 switch (arg) {
427 PARSE_CASE(PARSE_POST, post_array, TRACK_VARS_POST)
428 PARSE_CASE(PARSE_GET, get_array, TRACK_VARS_GET)
429 PARSE_CASE(PARSE_COOKIE, cookie_array, TRACK_VARS_COOKIE)
430 PARSE_CASE(PARSE_SERVER, server_array, TRACK_VARS_SERVER)
431 PARSE_CASE(PARSE_ENV, env_array, TRACK_VARS_ENV)
432
433 case PARSE_STRING: /* PARSE_STRING is used by parse_str() function */
434 retval = 1;
435 break;
436 }
437
438 /*
439 * According to rfc2965, more specific paths are listed above the less specific ones.
440 * If we encounter a duplicate cookie name, we should skip it, since it is not possible
441 * to have the same (plain text) cookie name for the same path and we should not overwrite
442 * more specific cookies with the less specific ones.
443 */
444 if (arg == PARSE_COOKIE && orig_array_ptr && zend_symtable_exists(Z_ARRVAL_P(orig_array_ptr), var, strlen(var)+1)) {
445 return 0;
446 }
447
448 if (array_ptr) {
449 /* Store the RAW variable internally */
450 Z_STRLEN(raw_var) = val_len;
451 Z_STRVAL(raw_var) = estrndup(*val, val_len);
452 Z_TYPE(raw_var) = IS_STRING;
453
454 php_register_variable_ex(var, &raw_var, array_ptr TSRMLS_CC);
455 }
456
457 if (val_len) {
458 /* Register mangled variable */
459 Z_STRLEN(new_var) = val_len;
460 Z_TYPE(new_var) = IS_STRING;
461
462 if (IF_G(default_filter) != FILTER_UNSAFE_RAW) {
463 zval *tmp_new_var = &new_var;
464 Z_STRVAL(new_var) = estrndup(*val, val_len);
465 INIT_PZVAL(tmp_new_var);
466 php_zval_filter(&tmp_new_var, IF_G(default_filter), IF_G(default_filter_flags), NULL, NULL/*charset*/, 0 TSRMLS_CC);
467 } else {
468 Z_STRVAL(new_var) = estrndup(*val, val_len);
469 }
470 } else { /* empty string */
471 ZVAL_EMPTY_STRING(&new_var);
472 }
473
474 if (orig_array_ptr) {
475 php_register_variable_ex(var, &new_var, orig_array_ptr TSRMLS_CC);
476 }
477
478 if (retval) {
479 if (new_val_len) {
480 *new_val_len = Z_STRLEN(new_var);
481 }
482 efree(*val);
483 if (Z_STRLEN(new_var)) {
484 *val = estrndup(Z_STRVAL(new_var), Z_STRLEN(new_var));
485 } else {
486 *val = estrdup("");
487 }
488 zval_dtor(&new_var);
489 }
490
491 return retval;
492 }
493 /* }}} */
494
php_zval_filter_recursive(zval ** value,long filter,long flags,zval * options,char * charset,zend_bool copy TSRMLS_DC)495 static void php_zval_filter_recursive(zval **value, long filter, long flags, zval *options, char *charset, zend_bool copy TSRMLS_DC) /* {{{ */
496 {
497 if (Z_TYPE_PP(value) == IS_ARRAY) {
498 zval **element;
499 HashPosition pos;
500
501 if (Z_ARRVAL_PP(value)->nApplyCount > 1) {
502 return;
503 }
504
505 for (zend_hash_internal_pointer_reset_ex(Z_ARRVAL_PP(value), &pos);
506 zend_hash_get_current_data_ex(Z_ARRVAL_PP(value), (void **) &element, &pos) == SUCCESS;
507 zend_hash_move_forward_ex(Z_ARRVAL_PP(value), &pos)
508 ) {
509 SEPARATE_ZVAL_IF_NOT_REF(element);
510 if (Z_TYPE_PP(element) == IS_ARRAY) {
511 Z_ARRVAL_PP(element)->nApplyCount++;
512 php_zval_filter_recursive(element, filter, flags, options, charset, copy TSRMLS_CC);
513 Z_ARRVAL_PP(element)->nApplyCount--;
514 } else {
515 php_zval_filter(element, filter, flags, options, charset, copy TSRMLS_CC);
516 }
517 }
518 } else {
519 php_zval_filter(value, filter, flags, options, charset, copy TSRMLS_CC);
520 }
521 }
522 /* }}} */
523
php_filter_get_storage(long arg TSRMLS_DC)524 static zval *php_filter_get_storage(long arg TSRMLS_DC)/* {{{ */
525
526 {
527 zval *array_ptr = NULL;
528
529 switch (arg) {
530 case PARSE_GET:
531 array_ptr = IF_G(get_array);
532 break;
533 case PARSE_POST:
534 array_ptr = IF_G(post_array);
535 break;
536 case PARSE_COOKIE:
537 array_ptr = IF_G(cookie_array);
538 break;
539 case PARSE_SERVER:
540 if (PG(auto_globals_jit)) {
541 zend_is_auto_global("_SERVER", sizeof("_SERVER")-1 TSRMLS_CC);
542 }
543 array_ptr = IF_G(server_array);
544 break;
545 case PARSE_ENV:
546 if (PG(auto_globals_jit)) {
547 zend_is_auto_global("_ENV", sizeof("_ENV")-1 TSRMLS_CC);
548 }
549 array_ptr = IF_G(env_array) ? IF_G(env_array) : PG(http_globals)[TRACK_VARS_ENV];
550 break;
551 case PARSE_SESSION:
552 /* FIXME: Implement session source */
553 php_error_docref(NULL TSRMLS_CC, E_WARNING, "INPUT_SESSION is not yet implemented");
554 break;
555 case PARSE_REQUEST:
556 /* FIXME: Implement request source */
557 php_error_docref(NULL TSRMLS_CC, E_WARNING, "INPUT_REQUEST is not yet implemented");
558 break;
559 }
560
561 return array_ptr;
562 }
563 /* }}} */
564
565 /* {{{ proto mixed filter_has_var(constant type, string variable_name)
566 * Returns true if the variable with the name 'name' exists in source.
567 */
PHP_FUNCTION(filter_has_var)568 PHP_FUNCTION(filter_has_var)
569 {
570 long arg;
571 char *var;
572 int var_len;
573 zval *array_ptr = NULL;
574
575 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ls", &arg, &var, &var_len) == FAILURE) {
576 RETURN_FALSE;
577 }
578
579 array_ptr = php_filter_get_storage(arg TSRMLS_CC);
580
581 if (array_ptr && HASH_OF(array_ptr) && zend_hash_exists(HASH_OF(array_ptr), var, var_len + 1)) {
582 RETURN_TRUE;
583 }
584
585 RETURN_FALSE;
586 }
587 /* }}} */
588
php_filter_call(zval ** filtered,long filter,zval ** filter_args,const int copy,long filter_flags TSRMLS_DC)589 static void php_filter_call(zval **filtered, long filter, zval **filter_args, const int copy, long filter_flags TSRMLS_DC) /* {{{ */
590 {
591 zval *options = NULL;
592 zval **option;
593 char *charset = NULL;
594
595 if (filter_args && Z_TYPE_PP(filter_args) != IS_ARRAY) {
596 long lval;
597
598 PHP_FILTER_GET_LONG_OPT(filter_args, lval);
599
600 if (filter != -1) { /* handler for array apply */
601 /* filter_args is the filter_flags */
602 filter_flags = lval;
603
604 if (!(filter_flags & FILTER_REQUIRE_ARRAY || filter_flags & FILTER_FORCE_ARRAY)) {
605 filter_flags |= FILTER_REQUIRE_SCALAR;
606 }
607 } else {
608 filter = lval;
609 }
610 } else if (filter_args) {
611 if (zend_hash_find(HASH_OF(*filter_args), "filter", sizeof("filter"), (void **)&option) == SUCCESS) {
612 PHP_FILTER_GET_LONG_OPT(option, filter);
613 }
614
615 if (zend_hash_find(HASH_OF(*filter_args), "flags", sizeof("flags"), (void **)&option) == SUCCESS) {
616 PHP_FILTER_GET_LONG_OPT(option, filter_flags);
617
618 if (!(filter_flags & FILTER_REQUIRE_ARRAY || filter_flags & FILTER_FORCE_ARRAY)) {
619 filter_flags |= FILTER_REQUIRE_SCALAR;
620 }
621 }
622
623 if (zend_hash_find(HASH_OF(*filter_args), "options", sizeof("options"), (void **)&option) == SUCCESS) {
624 if (filter != FILTER_CALLBACK) {
625 if (Z_TYPE_PP(option) == IS_ARRAY) {
626 options = *option;
627 }
628 } else {
629 options = *option;
630 filter_flags = 0;
631 }
632 }
633 }
634
635 if (Z_TYPE_PP(filtered) == IS_ARRAY) {
636 if (filter_flags & FILTER_REQUIRE_SCALAR) {
637 if (copy) {
638 SEPARATE_ZVAL(filtered);
639 }
640 zval_dtor(*filtered);
641 if (filter_flags & FILTER_NULL_ON_FAILURE) {
642 ZVAL_NULL(*filtered);
643 } else {
644 ZVAL_FALSE(*filtered);
645 }
646 return;
647 }
648 php_zval_filter_recursive(filtered, filter, filter_flags, options, charset, copy TSRMLS_CC);
649 return;
650 }
651 if (filter_flags & FILTER_REQUIRE_ARRAY) {
652 if (copy) {
653 SEPARATE_ZVAL(filtered);
654 }
655 zval_dtor(*filtered);
656 if (filter_flags & FILTER_NULL_ON_FAILURE) {
657 ZVAL_NULL(*filtered);
658 } else {
659 ZVAL_FALSE(*filtered);
660 }
661 return;
662 }
663
664 php_zval_filter(filtered, filter, filter_flags, options, charset, copy TSRMLS_CC);
665 if (filter_flags & FILTER_FORCE_ARRAY) {
666 zval *tmp;
667
668 ALLOC_ZVAL(tmp);
669 MAKE_COPY_ZVAL(filtered, tmp);
670
671 zval_dtor(*filtered);
672
673 array_init(*filtered);
674 add_next_index_zval(*filtered, tmp);
675 }
676 }
677 /* }}} */
678
php_filter_array_handler(zval * input,zval ** op,zval * return_value,zend_bool add_empty TSRMLS_DC)679 static void php_filter_array_handler(zval *input, zval **op, zval *return_value, zend_bool add_empty TSRMLS_DC) /* {{{ */
680 {
681 char *arg_key;
682 uint arg_key_len;
683 ulong index;
684 HashPosition pos;
685 zval **tmp, **arg_elm;
686
687 if (!op) {
688 zval_dtor(return_value);
689 MAKE_COPY_ZVAL(&input, return_value);
690 php_filter_call(&return_value, FILTER_DEFAULT, NULL, 0, FILTER_REQUIRE_ARRAY TSRMLS_CC);
691 } else if (Z_TYPE_PP(op) == IS_LONG) {
692 zval_dtor(return_value);
693 MAKE_COPY_ZVAL(&input, return_value);
694 php_filter_call(&return_value, Z_LVAL_PP(op), NULL, 0, FILTER_REQUIRE_ARRAY TSRMLS_CC);
695 } else if (Z_TYPE_PP(op) == IS_ARRAY) {
696 array_init(return_value);
697
698 zend_hash_internal_pointer_reset(Z_ARRVAL_PP(op));
699 for (zend_hash_internal_pointer_reset_ex(Z_ARRVAL_PP(op), &pos);
700 zend_hash_get_current_data_ex(Z_ARRVAL_PP(op), (void **) &arg_elm, &pos) == SUCCESS;
701 zend_hash_move_forward_ex(Z_ARRVAL_PP(op), &pos))
702 {
703 if (zend_hash_get_current_key_ex(Z_ARRVAL_PP(op), &arg_key, &arg_key_len, &index, 0, &pos) != HASH_KEY_IS_STRING) {
704 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Numeric keys are not allowed in the definition array");
705 zval_dtor(return_value);
706 RETURN_FALSE;
707 }
708 if (arg_key_len < 2) {
709 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Empty keys are not allowed in the definition array");
710 zval_dtor(return_value);
711 RETURN_FALSE;
712 }
713 if (zend_hash_find(Z_ARRVAL_P(input), arg_key, arg_key_len, (void **)&tmp) != SUCCESS) {
714 if (add_empty) {
715 add_assoc_null_ex(return_value, arg_key, arg_key_len);
716 }
717 } else {
718 zval *nval;
719
720 ALLOC_ZVAL(nval);
721 MAKE_COPY_ZVAL(tmp, nval);
722
723 php_filter_call(&nval, -1, arg_elm, 0, FILTER_REQUIRE_SCALAR TSRMLS_CC);
724 add_assoc_zval_ex(return_value, arg_key, arg_key_len, nval);
725 }
726 }
727 } else {
728 RETURN_FALSE;
729 }
730 }
731 /* }}} */
732
733 /* {{{ proto mixed filter_input(constant type, string variable_name [, long filter [, mixed options]])
734 * Returns the filtered variable 'name'* from source `type`.
735 */
PHP_FUNCTION(filter_input)736 PHP_FUNCTION(filter_input)
737 {
738 long fetch_from, filter = FILTER_DEFAULT;
739 zval **filter_args = NULL, **tmp;
740 zval *input = NULL;
741 char *var;
742 int var_len;
743
744 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ls|lZ", &fetch_from, &var, &var_len, &filter, &filter_args) == FAILURE) {
745 return;
746 }
747
748 if (!PHP_FILTER_ID_EXISTS(filter)) {
749 RETURN_FALSE;
750 }
751
752 input = php_filter_get_storage(fetch_from TSRMLS_CC);
753
754 if (!input || !HASH_OF(input) || zend_hash_find(HASH_OF(input), var, var_len + 1, (void **)&tmp) != SUCCESS) {
755 long filter_flags = 0;
756 zval **option, **opt, **def;
757 if (filter_args) {
758 if (Z_TYPE_PP(filter_args) == IS_LONG) {
759 filter_flags = Z_LVAL_PP(filter_args);
760 } else if (Z_TYPE_PP(filter_args) == IS_ARRAY && zend_hash_find(HASH_OF(*filter_args), "flags", sizeof("flags"), (void **)&option) == SUCCESS) {
761 PHP_FILTER_GET_LONG_OPT(option, filter_flags);
762 }
763 if (Z_TYPE_PP(filter_args) == IS_ARRAY &&
764 zend_hash_find(HASH_OF(*filter_args), "options", sizeof("options"), (void **)&opt) == SUCCESS &&
765 Z_TYPE_PP(opt) == IS_ARRAY &&
766 zend_hash_find(HASH_OF(*opt), "default", sizeof("default"), (void **)&def) == SUCCESS
767 ) {
768 MAKE_COPY_ZVAL(def, return_value);
769 return;
770 }
771 }
772
773 /* The FILTER_NULL_ON_FAILURE flag inverts the usual return values of
774 * the function: normally when validation fails false is returned, and
775 * when the input value doesn't exist NULL is returned. With the flag
776 * set, NULL and false should be returned, respectively. Ergo, although
777 * the code below looks incorrect, it's actually right. */
778 if (filter_flags & FILTER_NULL_ON_FAILURE) {
779 RETURN_FALSE;
780 } else {
781 RETURN_NULL();
782 }
783 }
784
785 MAKE_COPY_ZVAL(tmp, return_value);
786
787 php_filter_call(&return_value, filter, filter_args, 1, FILTER_REQUIRE_SCALAR TSRMLS_CC);
788 }
789 /* }}} */
790
791 /* {{{ proto mixed filter_var(mixed variable [, long filter [, mixed options]])
792 * Returns the filtered version of the vriable.
793 */
PHP_FUNCTION(filter_var)794 PHP_FUNCTION(filter_var)
795 {
796 long filter = FILTER_DEFAULT;
797 zval **filter_args = NULL, *data;
798
799 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z/|lZ", &data, &filter, &filter_args) == FAILURE) {
800 return;
801 }
802
803 if (!PHP_FILTER_ID_EXISTS(filter)) {
804 RETURN_FALSE;
805 }
806
807 MAKE_COPY_ZVAL(&data, return_value);
808
809 php_filter_call(&return_value, filter, filter_args, 1, FILTER_REQUIRE_SCALAR TSRMLS_CC);
810 }
811 /* }}} */
812
813 /* {{{ proto mixed filter_input_array(constant type, [, mixed options [, bool add_empty]]])
814 * Returns an array with all arguments defined in 'definition'.
815 */
PHP_FUNCTION(filter_input_array)816 PHP_FUNCTION(filter_input_array)
817 {
818 long fetch_from;
819 zval *array_input = NULL, **op = NULL;
820 zend_bool add_empty = 1;
821
822 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|Zb", &fetch_from, &op, &add_empty) == FAILURE) {
823 return;
824 }
825
826 if (op
827 && (Z_TYPE_PP(op) != IS_ARRAY)
828 && (Z_TYPE_PP(op) == IS_LONG && !PHP_FILTER_ID_EXISTS(Z_LVAL_PP(op)))
829 ) {
830 RETURN_FALSE;
831 }
832
833 array_input = php_filter_get_storage(fetch_from TSRMLS_CC);
834
835 if (!array_input || !HASH_OF(array_input)) {
836 long filter_flags = 0;
837 zval **option;
838 if (op) {
839 if (Z_TYPE_PP(op) == IS_LONG) {
840 filter_flags = Z_LVAL_PP(op);
841 } else if (Z_TYPE_PP(op) == IS_ARRAY && zend_hash_find(HASH_OF(*op), "flags", sizeof("flags"), (void **)&option) == SUCCESS) {
842 PHP_FILTER_GET_LONG_OPT(option, filter_flags);
843 }
844 }
845
846 /* The FILTER_NULL_ON_FAILURE flag inverts the usual return values of
847 * the function: normally when validation fails false is returned, and
848 * when the input value doesn't exist NULL is returned. With the flag
849 * set, NULL and false should be returned, respectively. Ergo, although
850 * the code below looks incorrect, it's actually right. */
851 if (filter_flags & FILTER_NULL_ON_FAILURE) {
852 RETURN_FALSE;
853 } else {
854 RETURN_NULL();
855 }
856 }
857
858 php_filter_array_handler(array_input, op, return_value, add_empty TSRMLS_CC);
859 }
860 /* }}} */
861
862 /* {{{ proto mixed filter_var_array(array data, [, mixed options [, bool add_empty]]])
863 * Returns an array with all arguments defined in 'definition'.
864 */
PHP_FUNCTION(filter_var_array)865 PHP_FUNCTION(filter_var_array)
866 {
867 zval *array_input = NULL, **op = NULL;
868 zend_bool add_empty = 1;
869
870 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "a|Zb", &array_input, &op, &add_empty) == FAILURE) {
871 return;
872 }
873
874 if (op
875 && (Z_TYPE_PP(op) != IS_ARRAY)
876 && (Z_TYPE_PP(op) == IS_LONG && !PHP_FILTER_ID_EXISTS(Z_LVAL_PP(op)))
877 ) {
878 RETURN_FALSE;
879 }
880
881 php_filter_array_handler(array_input, op, return_value, add_empty TSRMLS_CC);
882 }
883 /* }}} */
884
885 /* {{{ proto filter_list()
886 * Returns a list of all supported filters */
PHP_FUNCTION(filter_list)887 PHP_FUNCTION(filter_list)
888 {
889 int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
890
891 if (zend_parse_parameters_none() == FAILURE) {
892 return;
893 }
894
895 array_init(return_value);
896 for (i = 0; i < size; ++i) {
897 add_next_index_string(return_value, (char *)filter_list[i].name, 1);
898 }
899 }
900 /* }}} */
901
902 /* {{{ proto filter_id(string filtername)
903 * Returns the filter ID belonging to a named filter */
PHP_FUNCTION(filter_id)904 PHP_FUNCTION(filter_id)
905 {
906 int i, filter_len;
907 int size = sizeof(filter_list) / sizeof(filter_list_entry);
908 char *filter;
909
910 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &filter, &filter_len) == FAILURE) {
911 return;
912 }
913
914 for (i = 0; i < size; ++i) {
915 if (strcmp(filter_list[i].name, filter) == 0) {
916 RETURN_LONG(filter_list[i].id);
917 }
918 }
919
920 RETURN_FALSE;
921 }
922 /* }}} */
923
924 /*
925 * Local variables:
926 * tab-width: 4
927 * c-basic-offset: 4
928 * End:
929 * vim600: noet sw=4 ts=4 fdm=marker
930 * vim<600: noet sw=4 ts=4
931 */
932
