1 /*
2 +----------------------------------------------------------------------+
3 | Copyright (c) The PHP Group |
4 +----------------------------------------------------------------------+
5 | This source file is subject to version 3.01 of the PHP license, |
6 | that is bundled with this package in the file LICENSE, and is |
7 | available through the world-wide-web at the following url: |
8 | https://www.php.net/license/3_01.txt |
9 | If you did not receive a copy of the PHP license and are unable to |
10 | obtain it through the world-wide-web, please send a note to |
11 | license@php.net so we can mail you a copy immediately. |
12 +----------------------------------------------------------------------+
13 | Authors: Rasmus Lerdorf <rasmus@lerdorf.on.ca> |
14 | Zeev Suraski <zeev@php.net> |
15 +----------------------------------------------------------------------+
16 */
17
18 #include <stdio.h>
19 #include "php.h"
20 #include "ext/standard/php_standard.h"
21 #include "ext/standard/credits.h"
22 #include "zend_smart_str.h"
23 #include "php_variables.h"
24 #include "php_globals.h"
25 #include "php_content_types.h"
26 #include "SAPI.h"
27 #include "zend_globals.h"
28
29 /* for systems that need to override reading of environment variables */
30 void _php_import_environment_variables(zval *array_ptr);
31 void _php_load_environment_variables(zval *array_ptr);
32 PHPAPI void (*php_import_environment_variables)(zval *array_ptr) = _php_import_environment_variables;
33 PHPAPI void (*php_load_environment_variables)(zval *array_ptr) = _php_load_environment_variables;
34
php_register_variable(const char * var,const char * strval,zval * track_vars_array)35 PHPAPI void php_register_variable(const char *var, const char *strval, zval *track_vars_array)
36 {
37 php_register_variable_safe(var, strval, strlen(strval), track_vars_array);
38 }
39
40 /* binary-safe version */
php_register_variable_safe(const char * var,const char * strval,size_t str_len,zval * track_vars_array)41 PHPAPI void php_register_variable_safe(const char *var, const char *strval, size_t str_len, zval *track_vars_array)
42 {
43 zval new_entry;
44 assert(strval != NULL);
45
46 ZVAL_STRINGL_FAST(&new_entry, strval, str_len);
47
48 php_register_variable_ex(var, &new_entry, track_vars_array);
49 }
50
php_register_variable_quick(const char * name,size_t name_len,zval * val,HashTable * ht)51 static zend_always_inline void php_register_variable_quick(const char *name, size_t name_len, zval *val, HashTable *ht)
52 {
53 zend_string *key = zend_string_init_interned(name, name_len, 0);
54
55 zend_hash_update_ind(ht, key, val);
56 zend_string_release_ex(key, 0);
57 }
58
php_register_known_variable(const char * var_name,size_t var_name_len,zval * value,zval * track_vars_array)59 PHPAPI void php_register_known_variable(const char *var_name, size_t var_name_len, zval *value, zval *track_vars_array)
60 {
61 HashTable *symbol_table = NULL;
62
63 ZEND_ASSERT(var_name != NULL);
64 ZEND_ASSERT(var_name_len != 0);
65 ZEND_ASSERT(track_vars_array != NULL && Z_TYPE_P(track_vars_array) == IS_ARRAY);
66
67 symbol_table = Z_ARRVAL_P(track_vars_array);
68
69 #if ZEND_DEBUG
70 /* Verify the name is valid for a PHP variable */
71 ZEND_ASSERT(!(var_name_len == strlen("GLOBALS") && !memcmp(var_name, "GLOBALS", strlen("GLOBALS"))));
72 ZEND_ASSERT(!(var_name_len == strlen("this") && !memcmp(var_name, "this", strlen("this"))));
73
74 /* Assert that the variable name is not numeric */
75 zend_ulong idx;
76 ZEND_ASSERT(!ZEND_HANDLE_NUMERIC_STR(var_name, var_name_len, idx));
77 /* ensure that we don't have null bytes, spaces, dots, or array bracket in the variable name (not binary safe) */
78 const char *p = var_name;
79 for (size_t l = 0; l < var_name_len; l++) {
80 ZEND_ASSERT(*p != '\0' && *p != ' ' && *p != '.' && *p != '[');
81 p++;
82 }
83
84 /* Do not allow to register cookies this way */
85 ZEND_ASSERT(Z_TYPE(PG(http_globals)[TRACK_VARS_COOKIE]) == IS_UNDEF ||
86 Z_ARRVAL(PG(http_globals)[TRACK_VARS_COOKIE]) != symbol_table);
87 #endif
88
89 php_register_variable_quick(var_name, var_name_len, value, symbol_table);
90 }
91
92 /* Discard variable if mangling made it start with __Host-, where pre-mangling it did not start with __Host-
93 * Discard variable if mangling made it start with __Secure-, where pre-mangling it did not start with __Secure- */
php_is_forbidden_variable_name(const char * mangled_name,size_t mangled_name_len,const char * pre_mangled_name)94 static bool php_is_forbidden_variable_name(const char *mangled_name, size_t mangled_name_len, const char *pre_mangled_name)
95 {
96 if (mangled_name_len >= sizeof("__Host-")-1 && strncmp(mangled_name, "__Host-", sizeof("__Host-")-1) == 0 && strncmp(pre_mangled_name, "__Host-", sizeof("__Host-")-1) != 0) {
97 return true;
98 }
99
100 if (mangled_name_len >= sizeof("__Secure-")-1 && strncmp(mangled_name, "__Secure-", sizeof("__Secure-")-1) == 0 && strncmp(pre_mangled_name, "__Secure-", sizeof("__Secure-")-1) != 0) {
101 return true;
102 }
103
104 return false;
105 }
106
php_register_variable_ex(const char * var_name,zval * val,zval * track_vars_array)107 PHPAPI void php_register_variable_ex(const char *var_name, zval *val, zval *track_vars_array)
108 {
109 char *p = NULL;
110 char *ip = NULL; /* index pointer */
111 char *index;
112 char *var, *var_orig;
113 size_t var_len, index_len;
114 zval gpc_element, *gpc_element_p;
115 bool is_array = 0;
116 HashTable *symtable1 = NULL;
117 ALLOCA_FLAG(use_heap)
118
119 assert(var_name != NULL);
120
121 if (track_vars_array && Z_TYPE_P(track_vars_array) == IS_ARRAY) {
122 symtable1 = Z_ARRVAL_P(track_vars_array);
123 }
124
125 if (!symtable1) {
126 /* Nothing to do */
127 zval_ptr_dtor_nogc(val);
128 return;
129 }
130
131
132 /* ignore leading spaces in the variable name */
133 while (*var_name==' ') {
134 var_name++;
135 }
136
137 /*
138 * Prepare variable name
139 */
140 var_len = strlen(var_name);
141 var = var_orig = do_alloca(var_len + 1, use_heap);
142 memcpy(var_orig, var_name, var_len + 1);
143
144 /* ensure that we don't have spaces or dots in the variable name (not binary safe) */
145 for (p = var; *p; p++) {
146 if (*p == ' ' || *p == '.') {
147 *p='_';
148 } else if (*p == '[') {
149 is_array = 1;
150 ip = p;
151 *p = 0;
152 break;
153 }
154 }
155 var_len = p - var;
156
157 if (var_len==0) { /* empty variable name, or variable name with a space in it */
158 zval_ptr_dtor_nogc(val);
159 free_alloca(var_orig, use_heap);
160 return;
161 }
162
163 if (var_len == sizeof("this")-1 && EG(current_execute_data)) {
164 zend_execute_data *ex = EG(current_execute_data);
165
166 while (ex) {
167 if (ex->func && ZEND_USER_CODE(ex->func->common.type)) {
168 if ((ZEND_CALL_INFO(ex) & ZEND_CALL_HAS_SYMBOL_TABLE)
169 && ex->symbol_table == symtable1) {
170 if (memcmp(var, "this", sizeof("this")-1) == 0) {
171 zend_throw_error(NULL, "Cannot re-assign $this");
172 zval_ptr_dtor_nogc(val);
173 free_alloca(var_orig, use_heap);
174 return;
175 }
176 }
177 break;
178 }
179 ex = ex->prev_execute_data;
180 }
181 }
182
183 /* GLOBALS hijack attempt, reject parameter */
184 if (symtable1 == &EG(symbol_table) &&
185 var_len == sizeof("GLOBALS")-1 &&
186 !memcmp(var, "GLOBALS", sizeof("GLOBALS")-1)) {
187 zval_ptr_dtor_nogc(val);
188 free_alloca(var_orig, use_heap);
189 return;
190 }
191
192 index = var;
193 index_len = var_len;
194
195 if (is_array) {
196 int nest_level = 0;
197 while (1) {
198 char *index_s;
199 size_t new_idx_len = 0;
200
201 if(++nest_level > PG(max_input_nesting_level)) {
202 HashTable *ht;
203 /* too many levels of nesting */
204
205 if (track_vars_array) {
206 ht = Z_ARRVAL_P(track_vars_array);
207 zend_symtable_str_del(ht, var, var_len);
208 }
209
210 zval_ptr_dtor_nogc(val);
211
212 /* do not output the error message to the screen,
213 this helps us to to avoid "information disclosure" */
214 if (!PG(display_errors)) {
215 php_error_docref(NULL, E_WARNING, "Input variable nesting level exceeded " ZEND_LONG_FMT ". To increase the limit change max_input_nesting_level in php.ini.", PG(max_input_nesting_level));
216 }
217 free_alloca(var_orig, use_heap);
218 return;
219 }
220
221 ip++;
222 index_s = ip;
223 if (isspace(*ip)) {
224 ip++;
225 }
226 if (*ip==']') {
227 index_s = NULL;
228 } else {
229 ip = strchr(ip, ']');
230 if (!ip) {
231 /* not an index; un-terminate the var name */
232 *(index_s - 1) = '_';
233 /* PHP variables cannot contain ' ', '.', '[' in their names, so we replace the characters with a '_' */
234 for (p = index_s; *p; p++) {
235 if (*p == ' ' || *p == '.' || *p == '[') {
236 *p = '_';
237 }
238 }
239
240 index_len = 0;
241 if (index) {
242 index_len = strlen(index);
243 }
244 goto plain_var;
245 return;
246 }
247 *ip = 0;
248 new_idx_len = strlen(index_s);
249 }
250
251 if (!index) {
252 array_init(&gpc_element);
253 if ((gpc_element_p = zend_hash_next_index_insert(symtable1, &gpc_element)) == NULL) {
254 zend_array_destroy(Z_ARR(gpc_element));
255 zval_ptr_dtor_nogc(val);
256 free_alloca(var_orig, use_heap);
257 return;
258 }
259 } else {
260 if (php_is_forbidden_variable_name(index, index_len, var_name)) {
261 zval_ptr_dtor_nogc(val);
262 free_alloca(var_orig, use_heap);
263 return;
264 }
265
266 gpc_element_p = zend_symtable_str_find(symtable1, index, index_len);
267 if (!gpc_element_p) {
268 zval tmp;
269 array_init(&tmp);
270 gpc_element_p = zend_symtable_str_update_ind(symtable1, index, index_len, &tmp);
271 } else {
272 if (Z_TYPE_P(gpc_element_p) == IS_INDIRECT) {
273 gpc_element_p = Z_INDIRECT_P(gpc_element_p);
274 }
275 if (Z_TYPE_P(gpc_element_p) != IS_ARRAY) {
276 zval_ptr_dtor_nogc(gpc_element_p);
277 array_init(gpc_element_p);
278 } else {
279 SEPARATE_ARRAY(gpc_element_p);
280 }
281 }
282 }
283 symtable1 = Z_ARRVAL_P(gpc_element_p);
284 /* ip pointed to the '[' character, now obtain the key */
285 index = index_s;
286 index_len = new_idx_len;
287
288 ip++;
289 if (*ip == '[') {
290 is_array = 1;
291 *ip = 0;
292 } else {
293 goto plain_var;
294 }
295 }
296 } else {
297 plain_var:
298 if (!index) {
299 if (zend_hash_next_index_insert(symtable1, val) == NULL) {
300 zval_ptr_dtor_nogc(val);
301 }
302 } else {
303 if (php_is_forbidden_variable_name(index, index_len, var_name)) {
304 zval_ptr_dtor_nogc(val);
305 free_alloca(var_orig, use_heap);
306 return;
307 }
308
309 zend_ulong idx;
310
311 /*
312 * According to rfc2965, more specific paths are listed above the less specific ones.
313 * If we encounter a duplicate cookie name, we should skip it, since it is not possible
314 * to have the same (plain text) cookie name for the same path and we should not overwrite
315 * more specific cookies with the less specific ones.
316 */
317 if (Z_TYPE(PG(http_globals)[TRACK_VARS_COOKIE]) != IS_UNDEF &&
318 symtable1 == Z_ARRVAL(PG(http_globals)[TRACK_VARS_COOKIE]) &&
319 zend_symtable_str_exists(symtable1, index, index_len)) {
320 zval_ptr_dtor_nogc(val);
321 } else if (ZEND_HANDLE_NUMERIC_STR(index, index_len, idx)) {
322 zend_hash_index_update(symtable1, idx, val);
323 } else {
324 php_register_variable_quick(index, index_len, val, symtable1);
325 }
326 }
327 }
328 free_alloca(var_orig, use_heap);
329 }
330
331 typedef struct post_var_data {
332 smart_str str;
333 char *ptr;
334 char *end;
335 uint64_t cnt;
336
337 /* Bytes in ptr that have already been scanned for '&' */
338 size_t already_scanned;
339 } post_var_data_t;
340
add_post_var(zval * arr,post_var_data_t * var,bool eof)341 static bool add_post_var(zval *arr, post_var_data_t *var, bool eof)
342 {
343 char *start, *ksep, *vsep, *val;
344 size_t klen, vlen;
345 size_t new_vlen;
346
347 if (var->ptr >= var->end) {
348 return 0;
349 }
350
351 start = var->ptr + var->already_scanned;
352 vsep = memchr(start, '&', var->end - start);
353 if (!vsep) {
354 if (!eof) {
355 var->already_scanned = var->end - var->ptr;
356 return 0;
357 } else {
358 vsep = var->end;
359 }
360 }
361
362 ksep = memchr(var->ptr, '=', vsep - var->ptr);
363 if (ksep) {
364 *ksep = '\0';
365 /* "foo=bar&" or "foo=&" */
366 klen = ksep - var->ptr;
367 vlen = vsep - ++ksep;
368 } else {
369 ksep = "";
370 /* "foo&" */
371 klen = vsep - var->ptr;
372 vlen = 0;
373 }
374
375 php_url_decode(var->ptr, klen);
376
377 val = estrndup(ksep, vlen);
378 if (vlen) {
379 vlen = php_url_decode(val, vlen);
380 }
381
382 if (sapi_module.input_filter(PARSE_POST, var->ptr, &val, vlen, &new_vlen)) {
383 php_register_variable_safe(var->ptr, val, new_vlen, arr);
384 }
385 efree(val);
386
387 var->ptr = vsep + (vsep != var->end);
388 var->already_scanned = 0;
389 return 1;
390 }
391
add_post_vars(zval * arr,post_var_data_t * vars,bool eof)392 static inline int add_post_vars(zval *arr, post_var_data_t *vars, bool eof)
393 {
394 uint64_t max_vars = PG(max_input_vars);
395
396 vars->ptr = ZSTR_VAL(vars->str.s);
397 vars->end = ZSTR_VAL(vars->str.s) + ZSTR_LEN(vars->str.s);
398 while (add_post_var(arr, vars, eof)) {
399 if (++vars->cnt > max_vars) {
400 php_error_docref(NULL, E_WARNING,
401 "Input variables exceeded %" PRIu64 ". "
402 "To increase the limit change max_input_vars in php.ini.",
403 max_vars);
404 return FAILURE;
405 }
406 }
407
408 if (!eof && ZSTR_VAL(vars->str.s) != vars->ptr) {
409 memmove(ZSTR_VAL(vars->str.s), vars->ptr, ZSTR_LEN(vars->str.s) = vars->end - vars->ptr);
410 }
411 return SUCCESS;
412 }
413
414 #ifdef PHP_WIN32
415 #define SAPI_POST_HANDLER_BUFSIZ 16384
416 #else
417 # define SAPI_POST_HANDLER_BUFSIZ BUFSIZ
418 #endif
SAPI_POST_HANDLER_FUNC(php_std_post_handler)419 SAPI_API SAPI_POST_HANDLER_FUNC(php_std_post_handler)
420 {
421 zval *arr = (zval *) arg;
422 php_stream *s = SG(request_info).request_body;
423 post_var_data_t post_data;
424
425 if (s && SUCCESS == php_stream_rewind(s)) {
426 memset(&post_data, 0, sizeof(post_data));
427
428 while (!php_stream_eof(s)) {
429 char buf[SAPI_POST_HANDLER_BUFSIZ] = {0};
430 ssize_t len = php_stream_read(s, buf, SAPI_POST_HANDLER_BUFSIZ);
431
432 if (len > 0) {
433 smart_str_appendl(&post_data.str, buf, len);
434
435 if (SUCCESS != add_post_vars(arr, &post_data, 0)) {
436 smart_str_free(&post_data.str);
437 return;
438 }
439 }
440
441 if (len != SAPI_POST_HANDLER_BUFSIZ){
442 break;
443 }
444 }
445
446 if (post_data.str.s) {
447 add_post_vars(arr, &post_data, 1);
448 smart_str_free(&post_data.str);
449 }
450 }
451 }
452 #undef SAPI_POST_HANDLER_BUFSIZ
453
SAPI_INPUT_FILTER_FUNC(php_default_input_filter)454 SAPI_API SAPI_INPUT_FILTER_FUNC(php_default_input_filter)
455 {
456 /* TODO: check .ini setting here and apply user-defined input filter */
457 if(new_val_len) *new_val_len = val_len;
458 return 1;
459 }
460
SAPI_TREAT_DATA_FUNC(php_default_treat_data)461 SAPI_API SAPI_TREAT_DATA_FUNC(php_default_treat_data)
462 {
463 char *res = NULL, *var, *val, *separator = NULL;
464 const char *c_var;
465 zval array;
466 int free_buffer = 0;
467 char *strtok_buf = NULL;
468 zend_long count = 0;
469
470 ZVAL_UNDEF(&array);
471 switch (arg) {
472 case PARSE_POST:
473 case PARSE_GET:
474 case PARSE_COOKIE:
475 array_init(&array);
476 switch (arg) {
477 case PARSE_POST:
478 zval_ptr_dtor_nogc(&PG(http_globals)[TRACK_VARS_POST]);
479 ZVAL_COPY_VALUE(&PG(http_globals)[TRACK_VARS_POST], &array);
480 break;
481 case PARSE_GET:
482 zval_ptr_dtor_nogc(&PG(http_globals)[TRACK_VARS_GET]);
483 ZVAL_COPY_VALUE(&PG(http_globals)[TRACK_VARS_GET], &array);
484 break;
485 case PARSE_COOKIE:
486 zval_ptr_dtor_nogc(&PG(http_globals)[TRACK_VARS_COOKIE]);
487 ZVAL_COPY_VALUE(&PG(http_globals)[TRACK_VARS_COOKIE], &array);
488 break;
489 }
490 break;
491 default:
492 ZVAL_COPY_VALUE(&array, destArray);
493 break;
494 }
495
496 if (arg == PARSE_POST) {
497 sapi_handle_post(&array);
498 return;
499 }
500
501 if (arg == PARSE_GET) { /* GET data */
502 c_var = SG(request_info).query_string;
503 if (c_var && *c_var) {
504 res = (char *) estrdup(c_var);
505 free_buffer = 1;
506 } else {
507 free_buffer = 0;
508 }
509 } else if (arg == PARSE_COOKIE) { /* Cookie data */
510 c_var = SG(request_info).cookie_data;
511 if (c_var && *c_var) {
512 res = (char *) estrdup(c_var);
513 free_buffer = 1;
514 } else {
515 free_buffer = 0;
516 }
517 } else if (arg == PARSE_STRING) { /* String data */
518 res = str;
519 free_buffer = 1;
520 }
521
522 if (!res) {
523 return;
524 }
525
526 switch (arg) {
527 case PARSE_GET:
528 case PARSE_STRING:
529 separator = PG(arg_separator).input;
530 break;
531 case PARSE_COOKIE:
532 separator = ";\0";
533 break;
534 }
535
536 var = php_strtok_r(res, separator, &strtok_buf);
537
538 while (var) {
539 size_t val_len;
540 size_t new_val_len;
541
542 val = strchr(var, '=');
543
544 if (arg == PARSE_COOKIE) {
545 /* Remove leading spaces from cookie names, needed for multi-cookie header where ; can be followed by a space */
546 while (isspace(*var)) {
547 var++;
548 }
549 if (var == val || *var == '\0') {
550 goto next_cookie;
551 }
552 }
553
554 if (++count > PG(max_input_vars)) {
555 php_error_docref(NULL, E_WARNING, "Input variables exceeded " ZEND_LONG_FMT ". To increase the limit change max_input_vars in php.ini.", PG(max_input_vars));
556 break;
557 }
558
559 if (val) { /* have a value */
560
561 *val++ = '\0';
562
563 if (arg == PARSE_COOKIE) {
564 val_len = php_raw_url_decode(val, strlen(val));
565 } else {
566 val_len = php_url_decode(val, strlen(val));
567 }
568 } else {
569 val = "";
570 val_len = 0;
571 }
572
573 val = estrndup(val, val_len);
574 if (arg != PARSE_COOKIE) {
575 php_url_decode(var, strlen(var));
576 }
577 if (sapi_module.input_filter(arg, var, &val, val_len, &new_val_len)) {
578 php_register_variable_safe(var, val, new_val_len, &array);
579 }
580 efree(val);
581 next_cookie:
582 var = php_strtok_r(NULL, separator, &strtok_buf);
583 }
584
585 if (free_buffer) {
586 efree(res);
587 }
588 }
589
valid_environment_name(const char * name,const char * end)590 static zend_always_inline int valid_environment_name(const char *name, const char *end)
591 {
592 const char *s;
593
594 for (s = name; s < end; s++) {
595 if (*s == ' ' || *s == '.' || *s == '[') {
596 return 0;
597 }
598 }
599 return 1;
600 }
601
import_environment_variable(HashTable * ht,char * env)602 static zend_always_inline void import_environment_variable(HashTable *ht, char *env)
603 {
604 char *p;
605 size_t name_len, len;
606 zval val;
607 zend_ulong idx;
608
609 p = strchr(env, '=');
610 if (!p
611 || p == env
612 || !valid_environment_name(env, p)) {
613 /* malformed entry? */
614 return;
615 }
616 name_len = p - env;
617 p++;
618 len = strlen(p);
619 ZVAL_STRINGL_FAST(&val, p, len);
620 if (ZEND_HANDLE_NUMERIC_STR(env, name_len, idx)) {
621 zend_hash_index_update(ht, idx, &val);
622 } else {
623 php_register_variable_quick(env, name_len, &val, ht);
624 }
625 }
626
_php_import_environment_variables(zval * array_ptr)627 void _php_import_environment_variables(zval *array_ptr)
628 {
629 tsrm_env_lock();
630
631 #ifndef PHP_WIN32
632 for (char **env = environ; env != NULL && *env != NULL; env++) {
633 import_environment_variable(Z_ARRVAL_P(array_ptr), *env);
634 }
635 #else
636 wchar_t *environmentw = GetEnvironmentStringsW();
637 for (wchar_t *envw = environmentw; envw != NULL && *envw; envw += wcslen(envw) + 1) {
638 char *env = php_win32_cp_w_to_any(envw);
639 if (env != NULL) {
640 import_environment_variable(Z_ARRVAL_P(array_ptr), env);
641 free(env);
642 }
643 }
644 FreeEnvironmentStringsW(environmentw);
645 #endif
646
647 tsrm_env_unlock();
648 }
649
_php_load_environment_variables(zval * array_ptr)650 void _php_load_environment_variables(zval *array_ptr)
651 {
652 php_import_environment_variables(array_ptr);
653 }
654
php_std_auto_global_callback(char * name,uint32_t name_len)655 bool php_std_auto_global_callback(char *name, uint32_t name_len)
656 {
657 zend_printf("%s\n", name);
658 return 0; /* don't rearm */
659 }
660
661 /* {{{ php_build_argv */
php_build_argv(const char * s,zval * track_vars_array)662 PHPAPI void php_build_argv(const char *s, zval *track_vars_array)
663 {
664 zval arr, argc, tmp;
665 int count = 0;
666
667 if (!(SG(request_info).argc || track_vars_array)) {
668 return;
669 }
670
671 array_init(&arr);
672
673 /* Prepare argv */
674 if (SG(request_info).argc) { /* are we in cli sapi? */
675 int i;
676 for (i = 0; i < SG(request_info).argc; i++) {
677 ZVAL_STRING(&tmp, SG(request_info).argv[i]);
678 if (zend_hash_next_index_insert(Z_ARRVAL(arr), &tmp) == NULL) {
679 zend_string_efree(Z_STR(tmp));
680 }
681 }
682 } else if (s && *s) {
683 while (1) {
684 const char *space = strchr(s, '+');
685 /* auto-type */
686 ZVAL_STRINGL(&tmp, s, space ? space - s : strlen(s));
687 count++;
688 if (zend_hash_next_index_insert(Z_ARRVAL(arr), &tmp) == NULL) {
689 zend_string_efree(Z_STR(tmp));
690 }
691 if (!space) {
692 break;
693 }
694 s = space + 1;
695 }
696 }
697
698 /* prepare argc */
699 if (SG(request_info).argc) {
700 ZVAL_LONG(&argc, SG(request_info).argc);
701 } else {
702 ZVAL_LONG(&argc, count);
703 }
704
705 if (SG(request_info).argc) {
706 Z_ADDREF(arr);
707 zend_hash_update(&EG(symbol_table), ZSTR_KNOWN(ZEND_STR_ARGV), &arr);
708 zend_hash_update(&EG(symbol_table), ZSTR_KNOWN(ZEND_STR_ARGC), &argc);
709 }
710 if (track_vars_array && Z_TYPE_P(track_vars_array) == IS_ARRAY) {
711 Z_ADDREF(arr);
712 zend_hash_update(Z_ARRVAL_P(track_vars_array), ZSTR_KNOWN(ZEND_STR_ARGV), &arr);
713 zend_hash_update(Z_ARRVAL_P(track_vars_array), ZSTR_KNOWN(ZEND_STR_ARGC), &argc);
714 }
715 zval_ptr_dtor_nogc(&arr);
716 }
717 /* }}} */
718
719 /* {{{ php_register_server_variables */
php_register_server_variables(void)720 static inline void php_register_server_variables(void)
721 {
722 zval tmp;
723 zval *arr = &PG(http_globals)[TRACK_VARS_SERVER];
724 HashTable *ht;
725
726 zval_ptr_dtor_nogc(arr);
727 array_init(arr);
728
729 /* Server variables */
730 if (sapi_module.register_server_variables) {
731 sapi_module.register_server_variables(arr);
732 }
733 ht = Z_ARRVAL_P(arr);
734
735 /* PHP Authentication support */
736 if (SG(request_info).auth_user) {
737 ZVAL_STRING(&tmp, SG(request_info).auth_user);
738 php_register_variable_quick("PHP_AUTH_USER", sizeof("PHP_AUTH_USER")-1, &tmp, ht);
739 }
740 if (SG(request_info).auth_password) {
741 ZVAL_STRING(&tmp, SG(request_info).auth_password);
742 php_register_variable_quick("PHP_AUTH_PW", sizeof("PHP_AUTH_PW")-1, &tmp, ht);
743 }
744 if (SG(request_info).auth_digest) {
745 ZVAL_STRING(&tmp, SG(request_info).auth_digest);
746 php_register_variable_quick("PHP_AUTH_DIGEST", sizeof("PHP_AUTH_DIGEST")-1, &tmp, ht);
747 }
748
749 /* store request init time */
750 ZVAL_DOUBLE(&tmp, sapi_get_request_time());
751 php_register_variable_quick("REQUEST_TIME_FLOAT", sizeof("REQUEST_TIME_FLOAT")-1, &tmp, ht);
752 ZVAL_LONG(&tmp, zend_dval_to_lval(Z_DVAL(tmp)));
753 php_register_variable_quick("REQUEST_TIME", sizeof("REQUEST_TIME")-1, &tmp, ht);
754 }
755 /* }}} */
756
757 /* {{{ php_autoglobal_merge */
php_autoglobal_merge(HashTable * dest,HashTable * src)758 static void php_autoglobal_merge(HashTable *dest, HashTable *src)
759 {
760 zval *src_entry, *dest_entry;
761 zend_string *string_key;
762 zend_ulong num_key;
763 int globals_check = (dest == (&EG(symbol_table)));
764
765 ZEND_HASH_FOREACH_KEY_VAL(src, num_key, string_key, src_entry) {
766 if (Z_TYPE_P(src_entry) != IS_ARRAY
767 || (string_key && (dest_entry = zend_hash_find(dest, string_key)) == NULL)
768 || (string_key == NULL && (dest_entry = zend_hash_index_find(dest, num_key)) == NULL)
769 || Z_TYPE_P(dest_entry) != IS_ARRAY) {
770 Z_TRY_ADDREF_P(src_entry);
771 if (string_key) {
772 if (!globals_check || !zend_string_equals_literal(string_key, "GLOBALS")) {
773 zend_hash_update(dest, string_key, src_entry);
774 } else {
775 Z_TRY_DELREF_P(src_entry);
776 }
777 } else {
778 zend_hash_index_update(dest, num_key, src_entry);
779 }
780 } else {
781 SEPARATE_ARRAY(dest_entry);
782 php_autoglobal_merge(Z_ARRVAL_P(dest_entry), Z_ARRVAL_P(src_entry));
783 }
784 } ZEND_HASH_FOREACH_END();
785 }
786 /* }}} */
787
788 /* {{{ php_hash_environment */
php_hash_environment(void)789 PHPAPI int php_hash_environment(void)
790 {
791 memset(PG(http_globals), 0, sizeof(PG(http_globals)));
792 zend_activate_auto_globals();
793 if (PG(register_argc_argv)) {
794 php_build_argv(SG(request_info).query_string, &PG(http_globals)[TRACK_VARS_SERVER]);
795 }
796 return SUCCESS;
797 }
798 /* }}} */
799
php_auto_globals_create_get(zend_string * name)800 static bool php_auto_globals_create_get(zend_string *name)
801 {
802 if (PG(variables_order) && (strchr(PG(variables_order),'G') || strchr(PG(variables_order),'g'))) {
803 sapi_module.treat_data(PARSE_GET, NULL, NULL);
804 } else {
805 zval_ptr_dtor_nogc(&PG(http_globals)[TRACK_VARS_GET]);
806 array_init(&PG(http_globals)[TRACK_VARS_GET]);
807 }
808
809 zend_hash_update(&EG(symbol_table), name, &PG(http_globals)[TRACK_VARS_GET]);
810 Z_ADDREF(PG(http_globals)[TRACK_VARS_GET]);
811
812 return 0; /* don't rearm */
813 }
814
php_auto_globals_create_post(zend_string * name)815 static bool php_auto_globals_create_post(zend_string *name)
816 {
817 if (PG(variables_order) &&
818 (strchr(PG(variables_order),'P') || strchr(PG(variables_order),'p')) &&
819 !SG(headers_sent) &&
820 SG(request_info).request_method &&
821 !strcasecmp(SG(request_info).request_method, "POST")) {
822 sapi_module.treat_data(PARSE_POST, NULL, NULL);
823 } else {
824 zval_ptr_dtor_nogc(&PG(http_globals)[TRACK_VARS_POST]);
825 array_init(&PG(http_globals)[TRACK_VARS_POST]);
826 }
827
828 zend_hash_update(&EG(symbol_table), name, &PG(http_globals)[TRACK_VARS_POST]);
829 Z_ADDREF(PG(http_globals)[TRACK_VARS_POST]);
830
831 return 0; /* don't rearm */
832 }
833
php_auto_globals_create_cookie(zend_string * name)834 static bool php_auto_globals_create_cookie(zend_string *name)
835 {
836 if (PG(variables_order) && (strchr(PG(variables_order),'C') || strchr(PG(variables_order),'c'))) {
837 sapi_module.treat_data(PARSE_COOKIE, NULL, NULL);
838 } else {
839 zval_ptr_dtor_nogc(&PG(http_globals)[TRACK_VARS_COOKIE]);
840 array_init(&PG(http_globals)[TRACK_VARS_COOKIE]);
841 }
842
843 zend_hash_update(&EG(symbol_table), name, &PG(http_globals)[TRACK_VARS_COOKIE]);
844 Z_ADDREF(PG(http_globals)[TRACK_VARS_COOKIE]);
845
846 return 0; /* don't rearm */
847 }
848
php_auto_globals_create_files(zend_string * name)849 static bool php_auto_globals_create_files(zend_string *name)
850 {
851 if (Z_TYPE(PG(http_globals)[TRACK_VARS_FILES]) == IS_UNDEF) {
852 array_init(&PG(http_globals)[TRACK_VARS_FILES]);
853 }
854
855 zend_hash_update(&EG(symbol_table), name, &PG(http_globals)[TRACK_VARS_FILES]);
856 Z_ADDREF(PG(http_globals)[TRACK_VARS_FILES]);
857
858 return 0; /* don't rearm */
859 }
860
861 /* Ugly hack to fix HTTP_PROXY issue, see bug #72573 */
check_http_proxy(HashTable * var_table)862 static void check_http_proxy(HashTable *var_table)
863 {
864 if (zend_hash_str_exists(var_table, "HTTP_PROXY", sizeof("HTTP_PROXY")-1)) {
865 char *local_proxy = getenv("HTTP_PROXY");
866
867 if (!local_proxy) {
868 zend_hash_str_del(var_table, "HTTP_PROXY", sizeof("HTTP_PROXY")-1);
869 } else {
870 zval local_zval;
871 ZVAL_STRING(&local_zval, local_proxy);
872 zend_hash_str_update(var_table, "HTTP_PROXY", sizeof("HTTP_PROXY")-1, &local_zval);
873 }
874 }
875 }
876
php_auto_globals_create_server(zend_string * name)877 static bool php_auto_globals_create_server(zend_string *name)
878 {
879 if (PG(variables_order) && (strchr(PG(variables_order),'S') || strchr(PG(variables_order),'s'))) {
880 php_register_server_variables();
881
882 if (PG(register_argc_argv)) {
883 if (SG(request_info).argc) {
884 zval *argc, *argv;
885
886 if ((argc = zend_hash_find_ex_ind(&EG(symbol_table), ZSTR_KNOWN(ZEND_STR_ARGC), 1)) != NULL &&
887 (argv = zend_hash_find_ex_ind(&EG(symbol_table), ZSTR_KNOWN(ZEND_STR_ARGV), 1)) != NULL) {
888 Z_ADDREF_P(argv);
889 zend_hash_update(Z_ARRVAL(PG(http_globals)[TRACK_VARS_SERVER]), ZSTR_KNOWN(ZEND_STR_ARGV), argv);
890 zend_hash_update(Z_ARRVAL(PG(http_globals)[TRACK_VARS_SERVER]), ZSTR_KNOWN(ZEND_STR_ARGC), argc);
891 }
892 } else {
893 php_build_argv(SG(request_info).query_string, &PG(http_globals)[TRACK_VARS_SERVER]);
894 }
895 }
896
897 } else {
898 zval_ptr_dtor_nogc(&PG(http_globals)[TRACK_VARS_SERVER]);
899 array_init(&PG(http_globals)[TRACK_VARS_SERVER]);
900 zend_hash_real_init_mixed(Z_ARRVAL(PG(http_globals)[TRACK_VARS_SERVER]));
901 }
902
903 check_http_proxy(Z_ARRVAL(PG(http_globals)[TRACK_VARS_SERVER]));
904 zend_hash_update(&EG(symbol_table), name, &PG(http_globals)[TRACK_VARS_SERVER]);
905 Z_ADDREF(PG(http_globals)[TRACK_VARS_SERVER]);
906
907 /* TODO: TRACK_VARS_SERVER is modified in a number of places (e.g. phar) past this point,
908 * where rc>1 due to the $_SERVER global. Ideally this shouldn't happen, but for now we
909 * ignore this issue, as it would probably require larger changes. */
910 HT_ALLOW_COW_VIOLATION(Z_ARRVAL(PG(http_globals)[TRACK_VARS_SERVER]));
911
912 return 0; /* don't rearm */
913 }
914
php_auto_globals_create_env(zend_string * name)915 static bool php_auto_globals_create_env(zend_string *name)
916 {
917 zval_ptr_dtor_nogc(&PG(http_globals)[TRACK_VARS_ENV]);
918 array_init(&PG(http_globals)[TRACK_VARS_ENV]);
919
920 if (PG(variables_order) && (strchr(PG(variables_order),'E') || strchr(PG(variables_order),'e'))) {
921 php_import_environment_variables(&PG(http_globals)[TRACK_VARS_ENV]);
922 }
923
924 check_http_proxy(Z_ARRVAL(PG(http_globals)[TRACK_VARS_ENV]));
925 zend_hash_update(&EG(symbol_table), name, &PG(http_globals)[TRACK_VARS_ENV]);
926 Z_ADDREF(PG(http_globals)[TRACK_VARS_ENV]);
927
928 return 0; /* don't rearm */
929 }
930
php_auto_globals_create_request(zend_string * name)931 static bool php_auto_globals_create_request(zend_string *name)
932 {
933 zval form_variables;
934 unsigned char _gpc_flags[3] = {0, 0, 0};
935 char *p;
936
937 array_init(&form_variables);
938
939 if (PG(request_order) != NULL) {
940 p = PG(request_order);
941 } else {
942 p = PG(variables_order);
943 }
944
945 for (; p && *p; p++) {
946 switch (*p) {
947 case 'g':
948 case 'G':
949 if (!_gpc_flags[0]) {
950 php_autoglobal_merge(Z_ARRVAL(form_variables), Z_ARRVAL(PG(http_globals)[TRACK_VARS_GET]));
951 _gpc_flags[0] = 1;
952 }
953 break;
954 case 'p':
955 case 'P':
956 if (!_gpc_flags[1]) {
957 php_autoglobal_merge(Z_ARRVAL(form_variables), Z_ARRVAL(PG(http_globals)[TRACK_VARS_POST]));
958 _gpc_flags[1] = 1;
959 }
960 break;
961 case 'c':
962 case 'C':
963 if (!_gpc_flags[2]) {
964 php_autoglobal_merge(Z_ARRVAL(form_variables), Z_ARRVAL(PG(http_globals)[TRACK_VARS_COOKIE]));
965 _gpc_flags[2] = 1;
966 }
967 break;
968 }
969 }
970
971 zend_hash_update(&EG(symbol_table), name, &form_variables);
972 return 0;
973 }
974
php_startup_auto_globals(void)975 void php_startup_auto_globals(void)
976 {
977 zend_register_auto_global(zend_string_init_interned("_GET", sizeof("_GET")-1, 1), 0, php_auto_globals_create_get);
978 zend_register_auto_global(zend_string_init_interned("_POST", sizeof("_POST")-1, 1), 0, php_auto_globals_create_post);
979 zend_register_auto_global(zend_string_init_interned("_COOKIE", sizeof("_COOKIE")-1, 1), 0, php_auto_globals_create_cookie);
980 zend_register_auto_global(ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_SERVER), PG(auto_globals_jit), php_auto_globals_create_server);
981 zend_register_auto_global(ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_ENV), PG(auto_globals_jit), php_auto_globals_create_env);
982 zend_register_auto_global(ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_REQUEST), PG(auto_globals_jit), php_auto_globals_create_request);
983 zend_register_auto_global(zend_string_init_interned("_FILES", sizeof("_FILES")-1, 1), 0, php_auto_globals_create_files);
984 }
985
