1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2015 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: fbeb8bbbf6cc97f568996dac46e13e48e2907326 $ */
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 { "validate_mac", FILTER_VALIDATE_MAC, php_filter_validate_mac },
51
52 { "string", FILTER_SANITIZE_STRING, php_filter_string },
53 { "stripped", FILTER_SANITIZE_STRING, php_filter_string },
54 { "encoded", FILTER_SANITIZE_ENCODED, php_filter_encoded },
55 { "special_chars", FILTER_SANITIZE_SPECIAL_CHARS, php_filter_special_chars },
56 { "full_special_chars", FILTER_SANITIZE_FULL_SPECIAL_CHARS, php_filter_full_special_chars },
57 { "unsafe_raw", FILTER_UNSAFE_RAW, php_filter_unsafe_raw },
58 { "email", FILTER_SANITIZE_EMAIL, php_filter_email },
59 { "url", FILTER_SANITIZE_URL, php_filter_url },
60 { "number_int", FILTER_SANITIZE_NUMBER_INT, php_filter_number_int },
61 { "number_float", FILTER_SANITIZE_NUMBER_FLOAT, php_filter_number_float },
62 { "magic_quotes", FILTER_SANITIZE_MAGIC_QUOTES, php_filter_magic_quotes },
63
64 { "callback", FILTER_CALLBACK, php_filter_callback },
65 };
66 /* }}} */
67
68 #ifndef PARSE_ENV
69 #define PARSE_ENV 4
70 #endif
71
72 #ifndef PARSE_SERVER
73 #define PARSE_SERVER 5
74 #endif
75
76 #ifndef PARSE_SESSION
77 #define PARSE_SESSION 6
78 #endif
79
80 static unsigned int php_sapi_filter(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC);
81 static unsigned int php_sapi_filter_init(TSRMLS_D);
82
83 /* {{{ arginfo */
84 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_input, 0, 0, 2)
85 ZEND_ARG_INFO(0, type)
86 ZEND_ARG_INFO(0, variable_name)
87 ZEND_ARG_INFO(0, filter)
88 ZEND_ARG_INFO(0, options)
89 ZEND_END_ARG_INFO()
90
91 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_var, 0, 0, 1)
92 ZEND_ARG_INFO(0, variable)
93 ZEND_ARG_INFO(0, filter)
94 ZEND_ARG_INFO(0, options)
95 ZEND_END_ARG_INFO()
96
97 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_input_array, 0, 0, 1)
98 ZEND_ARG_INFO(0, type)
99 ZEND_ARG_INFO(0, definition)
100 ZEND_ARG_INFO(0, add_empty)
101 ZEND_END_ARG_INFO()
102
103 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_var_array, 0, 0, 1)
104 ZEND_ARG_INFO(0, data)
105 ZEND_ARG_INFO(0, definition)
106 ZEND_ARG_INFO(0, add_empty)
107 ZEND_END_ARG_INFO()
108
109 ZEND_BEGIN_ARG_INFO(arginfo_filter_list, 0)
110 ZEND_END_ARG_INFO()
111
112 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_has_var, 0, 0, 2)
113 ZEND_ARG_INFO(0, type)
114 ZEND_ARG_INFO(0, variable_name)
115 ZEND_END_ARG_INFO()
116
117 ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_id, 0, 0, 1)
118 ZEND_ARG_INFO(0, filtername)
119 ZEND_END_ARG_INFO()
120 /* }}} */
121
122 /* {{{ filter_functions[]
123 */
124 static const zend_function_entry filter_functions[] = {
125 PHP_FE(filter_input, arginfo_filter_input)
126 PHP_FE(filter_var, arginfo_filter_var)
127 PHP_FE(filter_input_array, arginfo_filter_input_array)
128 PHP_FE(filter_var_array, arginfo_filter_var_array)
129 PHP_FE(filter_list, arginfo_filter_list)
130 PHP_FE(filter_has_var, arginfo_filter_has_var)
131 PHP_FE(filter_id, arginfo_filter_id)
132 PHP_FE_END
133 };
134 /* }}} */
135
136 /* {{{ filter_module_entry
137 */
138 zend_module_entry filter_module_entry = {
139 #if ZEND_MODULE_API_NO >= 20010901
140 STANDARD_MODULE_HEADER,
141 #endif
142 "filter",
143 filter_functions,
144 PHP_MINIT(filter),
145 PHP_MSHUTDOWN(filter),
146 NULL,
147 PHP_RSHUTDOWN(filter),
148 PHP_MINFO(filter),
149 "0.11.0",
150 STANDARD_MODULE_PROPERTIES
151 };
152 /* }}} */
153
154 #ifdef COMPILE_DL_FILTER
155 ZEND_GET_MODULE(filter)
156 #endif
157
PHP_INI_MH(UpdateDefaultFilter)158 static PHP_INI_MH(UpdateDefaultFilter) /* {{{ */
159 {
160 int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
161
162 for (i = 0; i < size; ++i) {
163 if ((strcasecmp(new_value, filter_list[i].name) == 0)) {
164 IF_G(default_filter) = filter_list[i].id;
165 return SUCCESS;
166 }
167 }
168 /* Fallback to the default filter */
169 IF_G(default_filter) = FILTER_DEFAULT;
170 return SUCCESS;
171 }
172 /* }}} */
173
174 /* {{{ PHP_INI
175 */
PHP_INI_MH(OnUpdateFlags)176 static PHP_INI_MH(OnUpdateFlags)
177 {
178 if (!new_value) {
179 IF_G(default_filter_flags) = FILTER_FLAG_NO_ENCODE_QUOTES;
180 } else {
181 IF_G(default_filter_flags) = atoi(new_value);
182 }
183 return SUCCESS;
184 }
185
186 PHP_INI_BEGIN()
187 STD_PHP_INI_ENTRY("filter.default", "unsafe_raw", PHP_INI_SYSTEM|PHP_INI_PERDIR, UpdateDefaultFilter, default_filter, zend_filter_globals, filter_globals)
188 PHP_INI_ENTRY("filter.default_flags", NULL, PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateFlags)
PHP_INI_END()189 PHP_INI_END()
190 /* }}} */
191
192 static void php_filter_init_globals(zend_filter_globals *filter_globals) /* {{{ */
193 {
194 filter_globals->post_array = NULL;
195 filter_globals->get_array = NULL;
196 filter_globals->cookie_array = NULL;
197 filter_globals->env_array = NULL;
198 filter_globals->server_array = NULL;
199 filter_globals->session_array = NULL;
200 filter_globals->default_filter = FILTER_DEFAULT;
201 }
202 /* }}} */
203
204 #define PARSE_REQUEST 99
205
206 /* {{{ PHP_MINIT_FUNCTION
207 */
PHP_MINIT_FUNCTION(filter)208 PHP_MINIT_FUNCTION(filter)
209 {
210 ZEND_INIT_MODULE_GLOBALS(filter, php_filter_init_globals, NULL);
211
212 REGISTER_INI_ENTRIES();
213
214 REGISTER_LONG_CONSTANT("INPUT_POST", PARSE_POST, CONST_CS | CONST_PERSISTENT);
215 REGISTER_LONG_CONSTANT("INPUT_GET", PARSE_GET, CONST_CS | CONST_PERSISTENT);
216 REGISTER_LONG_CONSTANT("INPUT_COOKIE", PARSE_COOKIE, CONST_CS | CONST_PERSISTENT);
217 REGISTER_LONG_CONSTANT("INPUT_ENV", PARSE_ENV, CONST_CS | CONST_PERSISTENT);
218 REGISTER_LONG_CONSTANT("INPUT_SERVER", PARSE_SERVER, CONST_CS | CONST_PERSISTENT);
219 REGISTER_LONG_CONSTANT("INPUT_SESSION", PARSE_SESSION, CONST_CS | CONST_PERSISTENT);
220 REGISTER_LONG_CONSTANT("INPUT_REQUEST", PARSE_REQUEST, CONST_CS | CONST_PERSISTENT);
221
222 REGISTER_LONG_CONSTANT("FILTER_FLAG_NONE", FILTER_FLAG_NONE, CONST_CS | CONST_PERSISTENT);
223
224 REGISTER_LONG_CONSTANT("FILTER_REQUIRE_SCALAR", FILTER_REQUIRE_SCALAR, CONST_CS | CONST_PERSISTENT);
225 REGISTER_LONG_CONSTANT("FILTER_REQUIRE_ARRAY", FILTER_REQUIRE_ARRAY, CONST_CS | CONST_PERSISTENT);
226 REGISTER_LONG_CONSTANT("FILTER_FORCE_ARRAY", FILTER_FORCE_ARRAY, CONST_CS | CONST_PERSISTENT);
227 REGISTER_LONG_CONSTANT("FILTER_NULL_ON_FAILURE", FILTER_NULL_ON_FAILURE, CONST_CS | CONST_PERSISTENT);
228
229 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_INT", FILTER_VALIDATE_INT, CONST_CS | CONST_PERSISTENT);
230 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_BOOLEAN", FILTER_VALIDATE_BOOLEAN, CONST_CS | CONST_PERSISTENT);
231 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_FLOAT", FILTER_VALIDATE_FLOAT, CONST_CS | CONST_PERSISTENT);
232
233 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_REGEXP", FILTER_VALIDATE_REGEXP, CONST_CS | CONST_PERSISTENT);
234 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_URL", FILTER_VALIDATE_URL, CONST_CS | CONST_PERSISTENT);
235 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_EMAIL", FILTER_VALIDATE_EMAIL, CONST_CS | CONST_PERSISTENT);
236 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_IP", FILTER_VALIDATE_IP, CONST_CS | CONST_PERSISTENT);
237 REGISTER_LONG_CONSTANT("FILTER_VALIDATE_MAC", FILTER_VALIDATE_MAC, CONST_CS | CONST_PERSISTENT);
238
239 REGISTER_LONG_CONSTANT("FILTER_DEFAULT", FILTER_DEFAULT, CONST_CS | CONST_PERSISTENT);
240 REGISTER_LONG_CONSTANT("FILTER_UNSAFE_RAW", FILTER_UNSAFE_RAW, CONST_CS | CONST_PERSISTENT);
241
242 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_STRING", FILTER_SANITIZE_STRING, CONST_CS | CONST_PERSISTENT);
243 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_STRIPPED", FILTER_SANITIZE_STRING, CONST_CS | CONST_PERSISTENT);
244 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_ENCODED", FILTER_SANITIZE_ENCODED, CONST_CS | CONST_PERSISTENT);
245 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_SPECIAL_CHARS", FILTER_SANITIZE_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
246 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_FULL_SPECIAL_CHARS", FILTER_SANITIZE_FULL_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
247 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_EMAIL", FILTER_SANITIZE_EMAIL, CONST_CS | CONST_PERSISTENT);
248 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_URL", FILTER_SANITIZE_URL, CONST_CS | CONST_PERSISTENT);
249 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_NUMBER_INT", FILTER_SANITIZE_NUMBER_INT, CONST_CS | CONST_PERSISTENT);
250 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_NUMBER_FLOAT", FILTER_SANITIZE_NUMBER_FLOAT, CONST_CS | CONST_PERSISTENT);
251 REGISTER_LONG_CONSTANT("FILTER_SANITIZE_MAGIC_QUOTES", FILTER_SANITIZE_MAGIC_QUOTES, CONST_CS | CONST_PERSISTENT);
252
253 REGISTER_LONG_CONSTANT("FILTER_CALLBACK", FILTER_CALLBACK, CONST_CS | CONST_PERSISTENT);
254
255 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_OCTAL", FILTER_FLAG_ALLOW_OCTAL, CONST_CS | CONST_PERSISTENT);
256 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_HEX", FILTER_FLAG_ALLOW_HEX, CONST_CS | CONST_PERSISTENT);
257
258 REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_LOW", FILTER_FLAG_STRIP_LOW, CONST_CS | CONST_PERSISTENT);
259 REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_HIGH", FILTER_FLAG_STRIP_HIGH, CONST_CS | CONST_PERSISTENT);
260 REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_BACKTICK", FILTER_FLAG_STRIP_BACKTICK, CONST_CS | CONST_PERSISTENT);
261 REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_LOW", FILTER_FLAG_ENCODE_LOW, CONST_CS | CONST_PERSISTENT);
262 REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_HIGH", FILTER_FLAG_ENCODE_HIGH, CONST_CS | CONST_PERSISTENT);
263 REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_AMP", FILTER_FLAG_ENCODE_AMP, CONST_CS | CONST_PERSISTENT);
264 REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_ENCODE_QUOTES", FILTER_FLAG_NO_ENCODE_QUOTES, CONST_CS | CONST_PERSISTENT);
265 REGISTER_LONG_CONSTANT("FILTER_FLAG_EMPTY_STRING_NULL", FILTER_FLAG_EMPTY_STRING_NULL, CONST_CS | CONST_PERSISTENT);
266
267 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_FRACTION", FILTER_FLAG_ALLOW_FRACTION, CONST_CS | CONST_PERSISTENT);
268 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_THOUSAND", FILTER_FLAG_ALLOW_THOUSAND, CONST_CS | CONST_PERSISTENT);
269 REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_SCIENTIFIC", FILTER_FLAG_ALLOW_SCIENTIFIC, CONST_CS | CONST_PERSISTENT);
270
271 REGISTER_LONG_CONSTANT("FILTER_FLAG_SCHEME_REQUIRED", FILTER_FLAG_SCHEME_REQUIRED, CONST_CS | CONST_PERSISTENT);
272 REGISTER_LONG_CONSTANT("FILTER_FLAG_HOST_REQUIRED", FILTER_FLAG_HOST_REQUIRED, CONST_CS | CONST_PERSISTENT);
273 REGISTER_LONG_CONSTANT("FILTER_FLAG_PATH_REQUIRED", FILTER_FLAG_PATH_REQUIRED, CONST_CS | CONST_PERSISTENT);
274 REGISTER_LONG_CONSTANT("FILTER_FLAG_QUERY_REQUIRED", FILTER_FLAG_QUERY_REQUIRED, CONST_CS | CONST_PERSISTENT);
275
276 REGISTER_LONG_CONSTANT("FILTER_FLAG_IPV4", FILTER_FLAG_IPV4, CONST_CS | CONST_PERSISTENT);
277 REGISTER_LONG_CONSTANT("FILTER_FLAG_IPV6", FILTER_FLAG_IPV6, CONST_CS | CONST_PERSISTENT);
278 REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_RES_RANGE", FILTER_FLAG_NO_RES_RANGE, CONST_CS | CONST_PERSISTENT);
279 REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_PRIV_RANGE", FILTER_FLAG_NO_PRIV_RANGE, CONST_CS | CONST_PERSISTENT);
280
281 sapi_register_input_filter(php_sapi_filter, php_sapi_filter_init TSRMLS_CC);
282
283 return SUCCESS;
284 }
285 /* }}} */
286
287 /* {{{ PHP_MSHUTDOWN_FUNCTION
288 */
PHP_MSHUTDOWN_FUNCTION(filter)289 PHP_MSHUTDOWN_FUNCTION(filter)
290 {
291 UNREGISTER_INI_ENTRIES();
292
293 return SUCCESS;
294 }
295 /* }}} */
296
297 /* {{{ PHP_RSHUTDOWN_FUNCTION
298 */
299 #define VAR_ARRAY_COPY_DTOR(a) \
300 if (IF_G(a)) { \
301 zval_ptr_dtor(&IF_G(a)); \
302 IF_G(a) = NULL; \
303 }
304
PHP_RSHUTDOWN_FUNCTION(filter)305 PHP_RSHUTDOWN_FUNCTION(filter)
306 {
307 VAR_ARRAY_COPY_DTOR(get_array)
308 VAR_ARRAY_COPY_DTOR(post_array)
309 VAR_ARRAY_COPY_DTOR(cookie_array)
310 VAR_ARRAY_COPY_DTOR(server_array)
311 VAR_ARRAY_COPY_DTOR(env_array)
312 VAR_ARRAY_COPY_DTOR(session_array)
313 return SUCCESS;
314 }
315 /* }}} */
316
317 /* {{{ PHP_MINFO_FUNCTION
318 */
PHP_MINFO_FUNCTION(filter)319 PHP_MINFO_FUNCTION(filter)
320 {
321 php_info_print_table_start();
322 php_info_print_table_row( 2, "Input Validation and Filtering", "enabled" );
323 php_info_print_table_row( 2, "Revision", "$Id: fbeb8bbbf6cc97f568996dac46e13e48e2907326 $");
324 php_info_print_table_end();
325
326 DISPLAY_INI_ENTRIES();
327 }
328 /* }}} */
329
php_find_filter(long id)330 static filter_list_entry php_find_filter(long id) /* {{{ */
331 {
332 int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
333
334 for (i = 0; i < size; ++i) {
335 if (filter_list[i].id == id) {
336 return filter_list[i];
337 }
338 }
339 /* Fallback to "string" filter */
340 for (i = 0; i < size; ++i) {
341 if (filter_list[i].id == FILTER_DEFAULT) {
342 return filter_list[i];
343 }
344 }
345 /* To shut up GCC */
346 return filter_list[0];
347 }
348 /* }}} */
349
php_sapi_filter_init(TSRMLS_D)350 static unsigned int php_sapi_filter_init(TSRMLS_D)
351 {
352 IF_G(get_array) = NULL;
353 IF_G(post_array) = NULL;
354 IF_G(cookie_array) = NULL;
355 IF_G(server_array) = NULL;
356 IF_G(env_array) = NULL;
357 IF_G(session_array) = NULL;
358 return SUCCESS;
359 }
360
php_zval_filter(zval ** value,long filter,long flags,zval * options,char * charset,zend_bool copy TSRMLS_DC)361 static void php_zval_filter(zval **value, long filter, long flags, zval *options, char* charset, zend_bool copy TSRMLS_DC) /* {{{ */
362 {
363 filter_list_entry filter_func;
364
365 filter_func = php_find_filter(filter);
366
367 if (!filter_func.id) {
368 /* Find default filter */
369 filter_func = php_find_filter(FILTER_DEFAULT);
370 }
371
372 if (copy) {
373 SEPARATE_ZVAL(value);
374 }
375
376 /* #49274, fatal error with object without a toString method
377 Fails nicely instead of getting a recovarable fatal error. */
378 if (Z_TYPE_PP(value) == IS_OBJECT) {
379 zend_class_entry *ce;
380
381 ce = Z_OBJCE_PP(value);
382 if (!ce->__tostring) {
383 ZVAL_FALSE(*value);
384 return;
385 }
386 }
387
388 /* Here be strings */
389 convert_to_string(*value);
390
391 filter_func.function(*value, flags, options, charset TSRMLS_CC);
392
393 if (
394 options && (Z_TYPE_P(options) == IS_ARRAY || Z_TYPE_P(options) == IS_OBJECT) &&
395 ((flags & FILTER_NULL_ON_FAILURE && Z_TYPE_PP(value) == IS_NULL) ||
396 (!(flags & FILTER_NULL_ON_FAILURE) && Z_TYPE_PP(value) == IS_BOOL && Z_LVAL_PP(value) == 0)) &&
397 zend_hash_exists(HASH_OF(options), "default", sizeof("default"))
398 ) {
399 zval **tmp;
400 if (zend_hash_find(HASH_OF(options), "default", sizeof("default"), (void **)&tmp) == SUCCESS) {
401 MAKE_COPY_ZVAL(tmp, *value);
402 }
403 }
404 }
405 /* }}} */
406
php_sapi_filter(int arg,char * var,char ** val,unsigned int val_len,unsigned int * new_val_len TSRMLS_DC)407 static unsigned int php_sapi_filter(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC) /* {{{ */
408 {
409 zval new_var, raw_var;
410 zval *array_ptr = NULL, *orig_array_ptr = NULL;
411 int retval = 0;
412
413 assert(*val != NULL);
414
415 #define PARSE_CASE(s,a,t) \
416 case s: \
417 if (!IF_G(a)) { \
418 ALLOC_ZVAL(array_ptr); \
419 array_init(array_ptr); \
420 INIT_PZVAL(array_ptr); \
421 IF_G(a) = array_ptr; \
422 } else { \
423 array_ptr = IF_G(a); \
424 } \
425 orig_array_ptr = PG(http_globals)[t]; \
426 break;
427
428 switch (arg) {
429 PARSE_CASE(PARSE_POST, post_array, TRACK_VARS_POST)
430 PARSE_CASE(PARSE_GET, get_array, TRACK_VARS_GET)
431 PARSE_CASE(PARSE_COOKIE, cookie_array, TRACK_VARS_COOKIE)
432 PARSE_CASE(PARSE_SERVER, server_array, TRACK_VARS_SERVER)
433 PARSE_CASE(PARSE_ENV, env_array, TRACK_VARS_ENV)
434
435 case PARSE_STRING: /* PARSE_STRING is used by parse_str() function */
436 retval = 1;
437 break;
438 }
439
440 /*
441 * According to rfc2965, more specific paths are listed above the less specific ones.
442 * If we encounter a duplicate cookie name, we should skip it, since it is not possible
443 * to have the same (plain text) cookie name for the same path and we should not overwrite
444 * more specific cookies with the less specific ones.
445 */
446 if (arg == PARSE_COOKIE && orig_array_ptr && zend_symtable_exists(Z_ARRVAL_P(orig_array_ptr), var, strlen(var)+1)) {
447 return 0;
448 }
449
450 if (array_ptr) {
451 /* Store the RAW variable internally */
452 Z_STRLEN(raw_var) = val_len;
453 Z_STRVAL(raw_var) = estrndup(*val, val_len);
454 Z_TYPE(raw_var) = IS_STRING;
455
456 php_register_variable_ex(var, &raw_var, array_ptr TSRMLS_CC);
457 }
458
459 if (val_len) {
460 /* Register mangled variable */
461 Z_STRLEN(new_var) = val_len;
462 Z_TYPE(new_var) = IS_STRING;
463
464 if (IF_G(default_filter) != FILTER_UNSAFE_RAW) {
465 zval *tmp_new_var = &new_var;
466 Z_STRVAL(new_var) = estrndup(*val, val_len);
467 INIT_PZVAL(tmp_new_var);
468 php_zval_filter(&tmp_new_var, IF_G(default_filter), IF_G(default_filter_flags), NULL, NULL/*charset*/, 0 TSRMLS_CC);
469 } else {
470 Z_STRVAL(new_var) = estrndup(*val, val_len);
471 }
472 } else { /* empty string */
473 ZVAL_EMPTY_STRING(&new_var);
474 }
475
476 if (orig_array_ptr) {
477 php_register_variable_ex(var, &new_var, orig_array_ptr TSRMLS_CC);
478 }
479
480 if (retval) {
481 if (new_val_len) {
482 *new_val_len = Z_STRLEN(new_var);
483 }
484 efree(*val);
485 if (Z_STRLEN(new_var)) {
486 *val = estrndup(Z_STRVAL(new_var), Z_STRLEN(new_var));
487 } else {
488 *val = estrdup("");
489 }
490 zval_dtor(&new_var);
491 }
492
493 return retval;
494 }
495 /* }}} */
496
php_zval_filter_recursive(zval ** value,long filter,long flags,zval * options,char * charset,zend_bool copy TSRMLS_DC)497 static void php_zval_filter_recursive(zval **value, long filter, long flags, zval *options, char *charset, zend_bool copy TSRMLS_DC) /* {{{ */
498 {
499 if (Z_TYPE_PP(value) == IS_ARRAY) {
500 zval **element;
501 HashPosition pos;
502
503 if (Z_ARRVAL_PP(value)->nApplyCount > 1) {
504 return;
505 }
506
507 for (zend_hash_internal_pointer_reset_ex(Z_ARRVAL_PP(value), &pos);
508 zend_hash_get_current_data_ex(Z_ARRVAL_PP(value), (void **) &element, &pos) == SUCCESS;
509 zend_hash_move_forward_ex(Z_ARRVAL_PP(value), &pos)
510 ) {
511 SEPARATE_ZVAL_IF_NOT_REF(element);
512 if (Z_TYPE_PP(element) == IS_ARRAY) {
513 Z_ARRVAL_PP(element)->nApplyCount++;
514 php_zval_filter_recursive(element, filter, flags, options, charset, copy TSRMLS_CC);
515 Z_ARRVAL_PP(element)->nApplyCount--;
516 } else {
517 php_zval_filter(element, filter, flags, options, charset, copy TSRMLS_CC);
518 }
519 }
520 } else {
521 php_zval_filter(value, filter, flags, options, charset, copy TSRMLS_CC);
522 }
523 }
524 /* }}} */
525
php_filter_get_storage(long arg TSRMLS_DC)526 static zval *php_filter_get_storage(long arg TSRMLS_DC)/* {{{ */
527
528 {
529 zval *array_ptr = NULL;
530
531 switch (arg) {
532 case PARSE_GET:
533 array_ptr = IF_G(get_array);
534 break;
535 case PARSE_POST:
536 array_ptr = IF_G(post_array);
537 break;
538 case PARSE_COOKIE:
539 array_ptr = IF_G(cookie_array);
540 break;
541 case PARSE_SERVER:
542 if (PG(auto_globals_jit)) {
543 zend_is_auto_global("_SERVER", sizeof("_SERVER")-1 TSRMLS_CC);
544 }
545 array_ptr = IF_G(server_array);
546 break;
547 case PARSE_ENV:
548 if (PG(auto_globals_jit)) {
549 zend_is_auto_global("_ENV", sizeof("_ENV")-1 TSRMLS_CC);
550 }
551 array_ptr = IF_G(env_array) ? IF_G(env_array) : PG(http_globals)[TRACK_VARS_ENV];
552 break;
553 case PARSE_SESSION:
554 /* FIXME: Implement session source */
555 php_error_docref(NULL TSRMLS_CC, E_WARNING, "INPUT_SESSION is not yet implemented");
556 break;
557 case PARSE_REQUEST:
558 /* FIXME: Implement request source */
559 php_error_docref(NULL TSRMLS_CC, E_WARNING, "INPUT_REQUEST is not yet implemented");
560 break;
561 }
562
563 return array_ptr;
564 }
565 /* }}} */
566
567 /* {{{ proto mixed filter_has_var(constant type, string variable_name)
568 * Returns true if the variable with the name 'name' exists in source.
569 */
PHP_FUNCTION(filter_has_var)570 PHP_FUNCTION(filter_has_var)
571 {
572 long arg;
573 char *var;
574 int var_len;
575 zval *array_ptr = NULL;
576
577 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ls", &arg, &var, &var_len) == FAILURE) {
578 RETURN_FALSE;
579 }
580
581 array_ptr = php_filter_get_storage(arg TSRMLS_CC);
582
583 if (array_ptr && HASH_OF(array_ptr) && zend_hash_exists(HASH_OF(array_ptr), var, var_len + 1)) {
584 RETURN_TRUE;
585 }
586
587 RETURN_FALSE;
588 }
589 /* }}} */
590
php_filter_call(zval ** filtered,long filter,zval ** filter_args,const int copy,long filter_flags TSRMLS_DC)591 static void php_filter_call(zval **filtered, long filter, zval **filter_args, const int copy, long filter_flags TSRMLS_DC) /* {{{ */
592 {
593 zval *options = NULL;
594 zval **option;
595 char *charset = NULL;
596
597 if (filter_args && Z_TYPE_PP(filter_args) != IS_ARRAY) {
598 long lval;
599
600 PHP_FILTER_GET_LONG_OPT(filter_args, lval);
601
602 if (filter != -1) { /* handler for array apply */
603 /* filter_args is the filter_flags */
604 filter_flags = lval;
605
606 if (!(filter_flags & FILTER_REQUIRE_ARRAY || filter_flags & FILTER_FORCE_ARRAY)) {
607 filter_flags |= FILTER_REQUIRE_SCALAR;
608 }
609 } else {
610 filter = lval;
611 }
612 } else if (filter_args) {
613 if (zend_hash_find(HASH_OF(*filter_args), "filter", sizeof("filter"), (void **)&option) == SUCCESS) {
614 PHP_FILTER_GET_LONG_OPT(option, filter);
615 }
616
617 if (zend_hash_find(HASH_OF(*filter_args), "flags", sizeof("flags"), (void **)&option) == SUCCESS) {
618 PHP_FILTER_GET_LONG_OPT(option, filter_flags);
619
620 if (!(filter_flags & FILTER_REQUIRE_ARRAY || filter_flags & FILTER_FORCE_ARRAY)) {
621 filter_flags |= FILTER_REQUIRE_SCALAR;
622 }
623 }
624
625 if (zend_hash_find(HASH_OF(*filter_args), "options", sizeof("options"), (void **)&option) == SUCCESS) {
626 if (filter != FILTER_CALLBACK) {
627 if (Z_TYPE_PP(option) == IS_ARRAY) {
628 options = *option;
629 }
630 } else {
631 options = *option;
632 filter_flags = 0;
633 }
634 }
635 }
636
637 if (Z_TYPE_PP(filtered) == IS_ARRAY) {
638 if (filter_flags & FILTER_REQUIRE_SCALAR) {
639 if (copy) {
640 SEPARATE_ZVAL(filtered);
641 }
642 zval_dtor(*filtered);
643 if (filter_flags & FILTER_NULL_ON_FAILURE) {
644 ZVAL_NULL(*filtered);
645 } else {
646 ZVAL_FALSE(*filtered);
647 }
648 return;
649 }
650 php_zval_filter_recursive(filtered, filter, filter_flags, options, charset, copy TSRMLS_CC);
651 return;
652 }
653 if (filter_flags & FILTER_REQUIRE_ARRAY) {
654 if (copy) {
655 SEPARATE_ZVAL(filtered);
656 }
657 zval_dtor(*filtered);
658 if (filter_flags & FILTER_NULL_ON_FAILURE) {
659 ZVAL_NULL(*filtered);
660 } else {
661 ZVAL_FALSE(*filtered);
662 }
663 return;
664 }
665
666 php_zval_filter(filtered, filter, filter_flags, options, charset, copy TSRMLS_CC);
667 if (filter_flags & FILTER_FORCE_ARRAY) {
668 zval *tmp;
669
670 ALLOC_ZVAL(tmp);
671 MAKE_COPY_ZVAL(filtered, tmp);
672
673 zval_dtor(*filtered);
674
675 array_init(*filtered);
676 add_next_index_zval(*filtered, tmp);
677 }
678 }
679 /* }}} */
680
php_filter_array_handler(zval * input,zval ** op,zval * return_value,zend_bool add_empty TSRMLS_DC)681 static void php_filter_array_handler(zval *input, zval **op, zval *return_value, zend_bool add_empty TSRMLS_DC) /* {{{ */
682 {
683 char *arg_key;
684 uint arg_key_len;
685 ulong index;
686 HashPosition pos;
687 zval **tmp, **arg_elm;
688
689 if (!op) {
690 zval_dtor(return_value);
691 MAKE_COPY_ZVAL(&input, return_value);
692 php_filter_call(&return_value, FILTER_DEFAULT, NULL, 0, FILTER_REQUIRE_ARRAY TSRMLS_CC);
693 } else if (Z_TYPE_PP(op) == IS_LONG) {
694 zval_dtor(return_value);
695 MAKE_COPY_ZVAL(&input, return_value);
696 php_filter_call(&return_value, Z_LVAL_PP(op), NULL, 0, FILTER_REQUIRE_ARRAY TSRMLS_CC);
697 } else if (Z_TYPE_PP(op) == IS_ARRAY) {
698 array_init(return_value);
699
700 zend_hash_internal_pointer_reset(Z_ARRVAL_PP(op));
701 for (zend_hash_internal_pointer_reset_ex(Z_ARRVAL_PP(op), &pos);
702 zend_hash_get_current_data_ex(Z_ARRVAL_PP(op), (void **) &arg_elm, &pos) == SUCCESS;
703 zend_hash_move_forward_ex(Z_ARRVAL_PP(op), &pos))
704 {
705 if (zend_hash_get_current_key_ex(Z_ARRVAL_PP(op), &arg_key, &arg_key_len, &index, 0, &pos) != HASH_KEY_IS_STRING) {
706 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Numeric keys are not allowed in the definition array");
707 zval_dtor(return_value);
708 RETURN_FALSE;
709 }
710 if (arg_key_len < 2) {
711 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Empty keys are not allowed in the definition array");
712 zval_dtor(return_value);
713 RETURN_FALSE;
714 }
715 if (zend_hash_find(Z_ARRVAL_P(input), arg_key, arg_key_len, (void **)&tmp) != SUCCESS) {
716 if (add_empty) {
717 add_assoc_null_ex(return_value, arg_key, arg_key_len);
718 }
719 } else {
720 zval *nval;
721
722 ALLOC_ZVAL(nval);
723 MAKE_COPY_ZVAL(tmp, nval);
724
725 php_filter_call(&nval, -1, arg_elm, 0, FILTER_REQUIRE_SCALAR TSRMLS_CC);
726 add_assoc_zval_ex(return_value, arg_key, arg_key_len, nval);
727 }
728 }
729 } else {
730 RETURN_FALSE;
731 }
732 }
733 /* }}} */
734
735 /* {{{ proto mixed filter_input(constant type, string variable_name [, long filter [, mixed options]])
736 * Returns the filtered variable 'name'* from source `type`.
737 */
PHP_FUNCTION(filter_input)738 PHP_FUNCTION(filter_input)
739 {
740 long fetch_from, filter = FILTER_DEFAULT;
741 zval **filter_args = NULL, **tmp;
742 zval *input = NULL;
743 char *var;
744 int var_len;
745
746 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ls|lZ", &fetch_from, &var, &var_len, &filter, &filter_args) == FAILURE) {
747 return;
748 }
749
750 if (!PHP_FILTER_ID_EXISTS(filter)) {
751 RETURN_FALSE;
752 }
753
754 input = php_filter_get_storage(fetch_from TSRMLS_CC);
755
756 if (!input || !HASH_OF(input) || zend_hash_find(HASH_OF(input), var, var_len + 1, (void **)&tmp) != SUCCESS) {
757 long filter_flags = 0;
758 zval **option, **opt, **def;
759 if (filter_args) {
760 if (Z_TYPE_PP(filter_args) == IS_LONG) {
761 filter_flags = Z_LVAL_PP(filter_args);
762 } else if (Z_TYPE_PP(filter_args) == IS_ARRAY && zend_hash_find(HASH_OF(*filter_args), "flags", sizeof("flags"), (void **)&option) == SUCCESS) {
763 PHP_FILTER_GET_LONG_OPT(option, filter_flags);
764 }
765 if (Z_TYPE_PP(filter_args) == IS_ARRAY &&
766 zend_hash_find(HASH_OF(*filter_args), "options", sizeof("options"), (void **)&opt) == SUCCESS &&
767 Z_TYPE_PP(opt) == IS_ARRAY &&
768 zend_hash_find(HASH_OF(*opt), "default", sizeof("default"), (void **)&def) == SUCCESS
769 ) {
770 MAKE_COPY_ZVAL(def, return_value);
771 return;
772 }
773 }
774
775 /* The FILTER_NULL_ON_FAILURE flag inverts the usual return values of
776 * the function: normally when validation fails false is returned, and
777 * when the input value doesn't exist NULL is returned. With the flag
778 * set, NULL and false should be returned, respectively. Ergo, although
779 * the code below looks incorrect, it's actually right. */
780 if (filter_flags & FILTER_NULL_ON_FAILURE) {
781 RETURN_FALSE;
782 } else {
783 RETURN_NULL();
784 }
785 }
786
787 MAKE_COPY_ZVAL(tmp, return_value);
788
789 php_filter_call(&return_value, filter, filter_args, 1, FILTER_REQUIRE_SCALAR TSRMLS_CC);
790 }
791 /* }}} */
792
793 /* {{{ proto mixed filter_var(mixed variable [, long filter [, mixed options]])
794 * Returns the filtered version of the vriable.
795 */
PHP_FUNCTION(filter_var)796 PHP_FUNCTION(filter_var)
797 {
798 long filter = FILTER_DEFAULT;
799 zval **filter_args = NULL, *data;
800
801 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z/|lZ", &data, &filter, &filter_args) == FAILURE) {
802 return;
803 }
804
805 if (!PHP_FILTER_ID_EXISTS(filter)) {
806 RETURN_FALSE;
807 }
808
809 MAKE_COPY_ZVAL(&data, return_value);
810
811 php_filter_call(&return_value, filter, filter_args, 1, FILTER_REQUIRE_SCALAR TSRMLS_CC);
812 }
813 /* }}} */
814
815 /* {{{ proto mixed filter_input_array(constant type, [, mixed options [, bool add_empty]]])
816 * Returns an array with all arguments defined in 'definition'.
817 */
PHP_FUNCTION(filter_input_array)818 PHP_FUNCTION(filter_input_array)
819 {
820 long fetch_from;
821 zval *array_input = NULL, **op = NULL;
822 zend_bool add_empty = 1;
823
824 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|Zb", &fetch_from, &op, &add_empty) == FAILURE) {
825 return;
826 }
827
828 if (op
829 && (Z_TYPE_PP(op) != IS_ARRAY)
830 && (Z_TYPE_PP(op) == IS_LONG && !PHP_FILTER_ID_EXISTS(Z_LVAL_PP(op)))
831 ) {
832 RETURN_FALSE;
833 }
834
835 array_input = php_filter_get_storage(fetch_from TSRMLS_CC);
836
837 if (!array_input || !HASH_OF(array_input)) {
838 long filter_flags = 0;
839 zval **option;
840 if (op) {
841 if (Z_TYPE_PP(op) == IS_LONG) {
842 filter_flags = Z_LVAL_PP(op);
843 } else if (Z_TYPE_PP(op) == IS_ARRAY && zend_hash_find(HASH_OF(*op), "flags", sizeof("flags"), (void **)&option) == SUCCESS) {
844 PHP_FILTER_GET_LONG_OPT(option, filter_flags);
845 }
846 }
847
848 /* The FILTER_NULL_ON_FAILURE flag inverts the usual return values of
849 * the function: normally when validation fails false is returned, and
850 * when the input value doesn't exist NULL is returned. With the flag
851 * set, NULL and false should be returned, respectively. Ergo, although
852 * the code below looks incorrect, it's actually right. */
853 if (filter_flags & FILTER_NULL_ON_FAILURE) {
854 RETURN_FALSE;
855 } else {
856 RETURN_NULL();
857 }
858 }
859
860 php_filter_array_handler(array_input, op, return_value, add_empty TSRMLS_CC);
861 }
862 /* }}} */
863
864 /* {{{ proto mixed filter_var_array(array data, [, mixed options [, bool add_empty]]])
865 * Returns an array with all arguments defined in 'definition'.
866 */
PHP_FUNCTION(filter_var_array)867 PHP_FUNCTION(filter_var_array)
868 {
869 zval *array_input = NULL, **op = NULL;
870 zend_bool add_empty = 1;
871
872 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "a|Zb", &array_input, &op, &add_empty) == FAILURE) {
873 return;
874 }
875
876 if (op
877 && (Z_TYPE_PP(op) != IS_ARRAY)
878 && (Z_TYPE_PP(op) == IS_LONG && !PHP_FILTER_ID_EXISTS(Z_LVAL_PP(op)))
879 ) {
880 RETURN_FALSE;
881 }
882
883 php_filter_array_handler(array_input, op, return_value, add_empty TSRMLS_CC);
884 }
885 /* }}} */
886
887 /* {{{ proto filter_list()
888 * Returns a list of all supported filters */
PHP_FUNCTION(filter_list)889 PHP_FUNCTION(filter_list)
890 {
891 int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
892
893 if (zend_parse_parameters_none() == FAILURE) {
894 return;
895 }
896
897 array_init(return_value);
898 for (i = 0; i < size; ++i) {
899 add_next_index_string(return_value, (char *)filter_list[i].name, 1);
900 }
901 }
902 /* }}} */
903
904 /* {{{ proto filter_id(string filtername)
905 * Returns the filter ID belonging to a named filter */
PHP_FUNCTION(filter_id)906 PHP_FUNCTION(filter_id)
907 {
908 int i, filter_len;
909 int size = sizeof(filter_list) / sizeof(filter_list_entry);
910 char *filter;
911
912 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &filter, &filter_len) == FAILURE) {
913 return;
914 }
915
916 for (i = 0; i < size; ++i) {
917 if (strcmp(filter_list[i].name, filter) == 0) {
918 RETURN_LONG(filter_list[i].id);
919 }
920 }
921
922 RETURN_FALSE;
923 }
924 /* }}} */
925
926 /*
927 * Local variables:
928 * tab-width: 4
929 * c-basic-offset: 4
930 * End:
931 * vim600: noet sw=4 ts=4 fdm=marker
932 * vim<600: noet sw=4 ts=4
933 */
934
