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 | Jim Winstead <jimw@php.net> |
15 +----------------------------------------------------------------------+
16 */
17
18 /* {{{ includes */
19 #include "php.h"
20 #include "php_globals.h"
21 #include "SAPI.h"
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <errno.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <fcntl.h>
29
30 #ifdef PHP_WIN32
31 #define O_RDONLY _O_RDONLY
32 #include "win32/param.h"
33 #else
34 #include <sys/param.h>
35 #endif
36
37 #include "ext/standard/head.h"
38 #include "ext/standard/php_standard.h"
39 #include "zend_compile.h"
40 #include "php_network.h"
41
42 #if HAVE_PWD_H
43 #include <pwd.h>
44 #endif
45
46 #include <sys/types.h>
47 #if HAVE_SYS_SOCKET_H
48 #include <sys/socket.h>
49 #endif
50
51 #ifdef PHP_WIN32
52 #include <winsock2.h>
53 #else
54 #include <netinet/in.h>
55 #include <netdb.h>
56 #if HAVE_ARPA_INET_H
57 #include <arpa/inet.h>
58 #endif
59 #endif
60
61 #if defined(PHP_WIN32) || defined(__riscos__)
62 #undef AF_UNIX
63 #endif
64
65 #if defined(AF_UNIX)
66 #include <sys/un.h>
67 #endif
68 /* }}} */
69
70 /* {{{ OnUpdateBaseDir
71 Allows any change to open_basedir setting in during Startup and Shutdown events,
72 or a tightening during activation/runtime/deactivation */
ZEND_INI_MH(OnUpdateBaseDir)73 PHPAPI ZEND_INI_MH(OnUpdateBaseDir)
74 {
75 char **p = (char **) ZEND_INI_GET_ADDR();
76 char *pathbuf, *ptr, *end;
77
78 if (stage == PHP_INI_STAGE_STARTUP || stage == PHP_INI_STAGE_SHUTDOWN || stage == PHP_INI_STAGE_ACTIVATE || stage == PHP_INI_STAGE_DEACTIVATE) {
79 /* We're in a PHP_INI_SYSTEM context, no restrictions */
80 *p = new_value ? ZSTR_VAL(new_value) : NULL;
81 return SUCCESS;
82 }
83
84 /* Otherwise we're in runtime */
85 if (!*p || !**p) {
86 /* open_basedir not set yet, go ahead and give it a value */
87 *p = ZSTR_VAL(new_value);
88 return SUCCESS;
89 }
90
91 /* Shortcut: When we have a open_basedir and someone tries to unset, we know it'll fail */
92 if (!new_value || !*ZSTR_VAL(new_value)) {
93 return FAILURE;
94 }
95
96 /* Is the proposed open_basedir at least as restrictive as the current setting? */
97 ptr = pathbuf = estrdup(ZSTR_VAL(new_value));
98 while (ptr && *ptr) {
99 end = strchr(ptr, DEFAULT_DIR_SEPARATOR);
100 if (end != NULL) {
101 *end = '\0';
102 end++;
103 }
104 if (ptr[0] == '.' && ptr[1] == '.' && (ptr[2] == '\0' || IS_SLASH(ptr[2]))) {
105 /* Don't allow paths with a leading .. path component to be set at runtime */
106 efree(pathbuf);
107 return FAILURE;
108 }
109 if (php_check_open_basedir_ex(ptr, 0) != 0) {
110 /* At least one portion of this open_basedir is less restrictive than the prior one, FAIL */
111 efree(pathbuf);
112 return FAILURE;
113 }
114 ptr = end;
115 }
116 efree(pathbuf);
117
118 /* Everything checks out, set it */
119 *p = ZSTR_VAL(new_value);
120
121 return SUCCESS;
122 }
123 /* }}} */
124
125 /* {{{ php_check_specific_open_basedir
126 When open_basedir is not NULL, check if the given filename is located in
127 open_basedir. Returns -1 if error or not in the open_basedir, else 0.
128 When open_basedir is NULL, always return 0.
129 */
php_check_specific_open_basedir(const char * basedir,const char * path)130 PHPAPI int php_check_specific_open_basedir(const char *basedir, const char *path)
131 {
132 char resolved_name[MAXPATHLEN + 1];
133 char resolved_basedir[MAXPATHLEN + 1];
134 char local_open_basedir[MAXPATHLEN];
135 char path_tmp[MAXPATHLEN + 1];
136 char *path_file;
137 size_t resolved_basedir_len;
138 size_t resolved_name_len;
139 size_t path_len;
140 int nesting_level = 0;
141
142 /* Special case basedir==".": Use script-directory */
143 if (strcmp(basedir, ".") || !VCWD_GETCWD(local_open_basedir, MAXPATHLEN)) {
144 /* Else use the unmodified path */
145 strlcpy(local_open_basedir, basedir, sizeof(local_open_basedir));
146 }
147
148 path_len = strlen(path);
149 if (path_len > (MAXPATHLEN - 1)) {
150 /* empty and too long paths are invalid */
151 return -1;
152 }
153
154 /* normalize and expand path */
155 if (expand_filepath(path, resolved_name) == NULL) {
156 return -1;
157 }
158
159 path_len = strlen(resolved_name);
160 memcpy(path_tmp, resolved_name, path_len + 1); /* safe */
161
162 while (VCWD_REALPATH(path_tmp, resolved_name) == NULL) {
163 #if defined(PHP_WIN32) || defined(HAVE_SYMLINK)
164 if (nesting_level == 0) {
165 ssize_t ret;
166 char buf[MAXPATHLEN];
167
168 ret = php_sys_readlink(path_tmp, buf, MAXPATHLEN - 1);
169 if (ret == -1) {
170 /* not a broken symlink, move along.. */
171 } else {
172 /* put the real path into the path buffer */
173 memcpy(path_tmp, buf, ret);
174 path_tmp[ret] = '\0';
175 }
176 }
177 #endif
178
179 #ifdef PHP_WIN32
180 path_file = strrchr(path_tmp, DEFAULT_SLASH);
181 if (!path_file) {
182 path_file = strrchr(path_tmp, '/');
183 }
184 #else
185 path_file = strrchr(path_tmp, DEFAULT_SLASH);
186 #endif
187 if (!path_file) {
188 /* none of the path components exist. definitely not in open_basedir.. */
189 return -1;
190 } else {
191 path_len = path_file - path_tmp + 1;
192 #ifdef PHP_WIN32
193 if (path_len > 1 && path_tmp[path_len - 2] == ':') {
194 if (path_len != 3) {
195 return -1;
196 }
197 /* this is c:\ */
198 path_tmp[path_len] = '\0';
199 } else {
200 path_tmp[path_len - 1] = '\0';
201 }
202 #else
203 path_tmp[path_len - 1] = '\0';
204 #endif
205 }
206 if (*path_tmp == '\0') {
207 /* Do not pass an empty string to realpath(), as this will resolve to CWD. */
208 break;
209 }
210 nesting_level++;
211 }
212
213 /* Resolve open_basedir to resolved_basedir */
214 if (expand_filepath(local_open_basedir, resolved_basedir) != NULL) {
215 size_t basedir_len = strlen(basedir);
216 /* Handler for basedirs that end with a / */
217 resolved_basedir_len = strlen(resolved_basedir);
218 #ifdef PHP_WIN32
219 if (basedir[basedir_len - 1] == PHP_DIR_SEPARATOR || basedir[basedir_len - 1] == '/') {
220 #else
221 if (basedir[basedir_len - 1] == PHP_DIR_SEPARATOR) {
222 #endif
223 if (resolved_basedir[resolved_basedir_len - 1] != PHP_DIR_SEPARATOR) {
224 resolved_basedir[resolved_basedir_len] = PHP_DIR_SEPARATOR;
225 resolved_basedir[++resolved_basedir_len] = '\0';
226 }
227 } else {
228 resolved_basedir[resolved_basedir_len++] = PHP_DIR_SEPARATOR;
229 resolved_basedir[resolved_basedir_len] = '\0';
230 }
231
232 resolved_name_len = strlen(resolved_name);
233 if (path_tmp[path_len - 1] == PHP_DIR_SEPARATOR) {
234 if (resolved_name[resolved_name_len - 1] != PHP_DIR_SEPARATOR) {
235 resolved_name[resolved_name_len] = PHP_DIR_SEPARATOR;
236 resolved_name[++resolved_name_len] = '\0';
237 }
238 }
239
240 /* Check the path */
241 #ifdef PHP_WIN32
242 if (strncasecmp(resolved_basedir, resolved_name, resolved_basedir_len) == 0) {
243 #else
244 if (strncmp(resolved_basedir, resolved_name, resolved_basedir_len) == 0) {
245 #endif
246 if (resolved_name_len > resolved_basedir_len &&
247 resolved_name[resolved_basedir_len - 1] != PHP_DIR_SEPARATOR) {
248 return -1;
249 } else {
250 /* File is in the right directory */
251 return 0;
252 }
253 } else {
254 /* /openbasedir/ and /openbasedir are the same directory */
255 if (resolved_basedir_len == (resolved_name_len + 1) && resolved_basedir[resolved_basedir_len - 1] == PHP_DIR_SEPARATOR) {
256 #ifdef PHP_WIN32
257 if (strncasecmp(resolved_basedir, resolved_name, resolved_name_len) == 0) {
258 #else
259 if (strncmp(resolved_basedir, resolved_name, resolved_name_len) == 0) {
260 #endif
261 return 0;
262 }
263 }
264 return -1;
265 }
266 } else {
267 /* Unable to resolve the real path, return -1 */
268 return -1;
269 }
270 }
271 /* }}} */
272
273 PHPAPI int php_check_open_basedir(const char *path)
274 {
275 return php_check_open_basedir_ex(path, 1);
276 }
277
278 /* {{{ php_check_open_basedir */
279 PHPAPI int php_check_open_basedir_ex(const char *path, int warn)
280 {
281 /* Only check when open_basedir is available */
282 if (PG(open_basedir) && *PG(open_basedir)) {
283 char *pathbuf;
284 char *ptr;
285 char *end;
286
287 /* Check if the path is too long so we can give a more useful error
288 * message. */
289 if (strlen(path) > (MAXPATHLEN - 1)) {
290 php_error_docref(NULL, E_WARNING, "File name is longer than the maximum allowed path length on this platform (%d): %s", MAXPATHLEN, path);
291 errno = EINVAL;
292 return -1;
293 }
294
295 pathbuf = estrdup(PG(open_basedir));
296
297 ptr = pathbuf;
298
299 while (ptr && *ptr) {
300 end = strchr(ptr, DEFAULT_DIR_SEPARATOR);
301 if (end != NULL) {
302 *end = '\0';
303 end++;
304 }
305
306 if (php_check_specific_open_basedir(ptr, path) == 0) {
307 efree(pathbuf);
308 return 0;
309 }
310
311 ptr = end;
312 }
313 if (warn) {
314 php_error_docref(NULL, E_WARNING, "open_basedir restriction in effect. File(%s) is not within the allowed path(s): (%s)", path, PG(open_basedir));
315 }
316 efree(pathbuf);
317 errno = EPERM; /* we deny permission to open it */
318 return -1;
319 }
320
321 /* Nothing to check... */
322 return 0;
323 }
324 /* }}} */
325
326 /* {{{ php_fopen_and_set_opened_path */
327 static FILE *php_fopen_and_set_opened_path(const char *path, const char *mode, zend_string **opened_path)
328 {
329 FILE *fp;
330
331 if (php_check_open_basedir((char *)path)) {
332 return NULL;
333 }
334 fp = VCWD_FOPEN(path, mode);
335 if (fp && opened_path) {
336 //TODO :avoid reallocation
337 char *tmp = expand_filepath_with_mode(path, NULL, NULL, 0, CWD_EXPAND);
338 if (tmp) {
339 *opened_path = zend_string_init(tmp, strlen(tmp), 0);
340 efree(tmp);
341 }
342 }
343 return fp;
344 }
345 /* }}} */
346
347 /* {{{ php_fopen_primary_script */
348 PHPAPI int php_fopen_primary_script(zend_file_handle *file_handle)
349 {
350 char *path_info;
351 zend_string *filename = NULL;
352 zend_string *resolved_path = NULL;
353 size_t length;
354 bool orig_display_errors;
355
356 memset(file_handle, 0, sizeof(zend_file_handle));
357
358 path_info = SG(request_info).request_uri;
359 #if HAVE_PWD_H
360 if (PG(user_dir) && *PG(user_dir) && path_info && '/' == path_info[0] && '~' == path_info[1]) {
361 char *s = strchr(path_info + 2, '/');
362
363 if (s) { /* if there is no path name after the file, do not bother */
364 char user[32]; /* to try open the directory */
365
366 length = s - (path_info + 2);
367 if (length > sizeof(user) - 1) {
368 length = sizeof(user) - 1;
369 }
370 memcpy(user, path_info + 2, length);
371 user[length] = '\0';
372
373 struct passwd *pw;
374 #if defined(ZTS) && defined(HAVE_GETPWNAM_R) && defined(_SC_GETPW_R_SIZE_MAX)
375 struct passwd pwstruc;
376 long pwbuflen = sysconf(_SC_GETPW_R_SIZE_MAX);
377 char *pwbuf;
378 int err;
379
380 if (pwbuflen < 1) {
381 pwbuflen = 1024;
382 }
383 # if ZEND_DEBUG
384 /* Test retry logic */
385 pwbuflen = 1;
386 # endif
387 pwbuf = emalloc(pwbuflen);
388
389 try_again:
390 err = getpwnam_r(user, &pwstruc, pwbuf, pwbuflen, &pw);
391 if (err) {
392 if (err == ERANGE) {
393 pwbuflen *= 2;
394 pwbuf = erealloc(pwbuf, pwbuflen);
395 goto try_again;
396 }
397 efree(pwbuf);
398 return FAILURE;
399 }
400 #else
401 pw = getpwnam(user);
402 #endif
403 if (pw && pw->pw_dir) {
404 filename = zend_strpprintf(0, "%s%c%s%c%s", pw->pw_dir, PHP_DIR_SEPARATOR, PG(user_dir), PHP_DIR_SEPARATOR, s + 1); /* Safe */
405 } else if (SG(request_info).path_translated) {
406 filename = zend_string_init(SG(request_info).path_translated,
407 strlen(SG(request_info).path_translated), 0);
408 }
409 #if defined(ZTS) && defined(HAVE_GETPWNAM_R) && defined(_SC_GETPW_R_SIZE_MAX)
410 efree(pwbuf);
411 #endif
412 }
413 } else
414 #endif
415 if (PG(doc_root) && path_info && (length = strlen(PG(doc_root))) &&
416 IS_ABSOLUTE_PATH(PG(doc_root), length)) {
417 size_t path_len = strlen(path_info);
418 filename = zend_string_alloc(length + path_len + 2, 0);
419 memcpy(ZSTR_VAL(filename), PG(doc_root), length);
420 if (!IS_SLASH(ZSTR_VAL(filename)[length - 1])) { /* length is never 0 */
421 ZSTR_VAL(filename)[length++] = PHP_DIR_SEPARATOR;
422 }
423 if (IS_SLASH(path_info[0])) {
424 length--;
425 }
426 strncpy(ZSTR_VAL(filename) + length, path_info, path_len + 1);
427 ZSTR_LEN(filename) = length + path_len;
428 } else if (SG(request_info).path_translated) {
429 filename = zend_string_init(SG(request_info).path_translated,
430 strlen(SG(request_info).path_translated), 0);
431 }
432
433
434 if (filename) {
435 resolved_path = zend_resolve_path(filename);
436 }
437
438 if (!resolved_path) {
439 if (filename) {
440 zend_string_release(filename);
441 }
442 /* we have to free SG(request_info).path_translated here because
443 * php_destroy_request_info assumes that it will get
444 * freed when the include_names hash is emptied, but
445 * we're not adding it in this case */
446 if (SG(request_info).path_translated) {
447 efree(SG(request_info).path_translated);
448 SG(request_info).path_translated = NULL;
449 }
450 return FAILURE;
451 }
452 zend_string_release_ex(resolved_path, 0);
453
454 orig_display_errors = PG(display_errors);
455 PG(display_errors) = 0;
456 zend_stream_init_filename_ex(file_handle, filename);
457 file_handle->primary_script = 1;
458 if (filename) {
459 zend_string_delref(filename);
460 }
461 if (zend_stream_open(file_handle) == FAILURE) {
462 PG(display_errors) = orig_display_errors;
463 if (SG(request_info).path_translated) {
464 efree(SG(request_info).path_translated);
465 SG(request_info).path_translated = NULL;
466 }
467 return FAILURE;
468 }
469 PG(display_errors) = orig_display_errors;
470
471 return SUCCESS;
472 }
473 /* }}} */
474
475 static zend_string *tsrm_realpath_str(const char *path) {
476 char *realpath = tsrm_realpath(path, NULL);
477 if (!realpath) {
478 return NULL;
479 }
480 zend_string *realpath_str = zend_string_init(realpath, strlen(realpath), 0);
481 efree(realpath);
482 return realpath_str;
483 }
484
485 /* {{{ php_resolve_path
486 * Returns the realpath for given filename according to include path
487 */
488 PHPAPI zend_string *php_resolve_path(const char *filename, size_t filename_length, const char *path)
489 {
490 zend_string *resolved_path;
491 char trypath[MAXPATHLEN];
492 const char *ptr, *end, *p;
493 const char *actual_path;
494 php_stream_wrapper *wrapper;
495 zend_string *exec_filename;
496
497 if (!filename || CHECK_NULL_PATH(filename, filename_length)) {
498 return NULL;
499 }
500
501 /* Don't resolve paths which contain protocol (except of file://) */
502 for (p = filename; isalnum((int)*p) || *p == '+' || *p == '-' || *p == '.'; p++);
503 if ((*p == ':') && (p - filename > 1) && (p[1] == '/') && (p[2] == '/')) {
504 wrapper = php_stream_locate_url_wrapper(filename, &actual_path, STREAM_OPEN_FOR_INCLUDE);
505 if (wrapper == &php_plain_files_wrapper) {
506 if ((resolved_path = tsrm_realpath_str(actual_path))) {
507 return resolved_path;
508 }
509 }
510 return NULL;
511 }
512
513 if ((*filename == '.' &&
514 (IS_SLASH(filename[1]) ||
515 ((filename[1] == '.') && IS_SLASH(filename[2])))) ||
516 IS_ABSOLUTE_PATH(filename, filename_length) ||
517 #ifdef PHP_WIN32
518 /* This should count as an absolute local path as well, however
519 IS_ABSOLUTE_PATH doesn't care about this path form till now. It
520 might be a big thing to extend, thus just a local handling for
521 now. */
522 filename_length >=2 && IS_SLASH(filename[0]) && !IS_SLASH(filename[1]) ||
523 #endif
524 !path ||
525 !*path) {
526 return tsrm_realpath_str(filename);
527 }
528
529 ptr = path;
530 while (ptr && *ptr) {
531 /* Check for stream wrapper */
532 int is_stream_wrapper = 0;
533
534 for (p = ptr; isalnum((int)*p) || *p == '+' || *p == '-' || *p == '.'; p++);
535 if ((*p == ':') && (p - ptr > 1) && (p[1] == '/') && (p[2] == '/')) {
536 /* .:// or ..:// is not a stream wrapper */
537 if (p[-1] != '.' || p[-2] != '.' || p - 2 != ptr) {
538 p += 3;
539 is_stream_wrapper = 1;
540 }
541 }
542 end = strchr(p, DEFAULT_DIR_SEPARATOR);
543 if (end) {
544 if (filename_length > (MAXPATHLEN - 2) || (end-ptr) > MAXPATHLEN || (end-ptr) + 1 + filename_length + 1 >= MAXPATHLEN) {
545 ptr = end + 1;
546 continue;
547 }
548 memcpy(trypath, ptr, end-ptr);
549 trypath[end-ptr] = '/';
550 memcpy(trypath+(end-ptr)+1, filename, filename_length+1);
551 ptr = end+1;
552 } else {
553 size_t len = strlen(ptr);
554
555 if (filename_length > (MAXPATHLEN - 2) || len > MAXPATHLEN || len + 1 + filename_length + 1 >= MAXPATHLEN) {
556 break;
557 }
558 memcpy(trypath, ptr, len);
559 trypath[len] = '/';
560 memcpy(trypath+len+1, filename, filename_length+1);
561 ptr = NULL;
562 }
563 actual_path = trypath;
564 if (is_stream_wrapper) {
565 wrapper = php_stream_locate_url_wrapper(trypath, &actual_path, STREAM_OPEN_FOR_INCLUDE);
566 if (!wrapper) {
567 continue;
568 } else if (wrapper != &php_plain_files_wrapper) {
569 if (wrapper->wops->url_stat) {
570 php_stream_statbuf ssb;
571
572 if (SUCCESS == wrapper->wops->url_stat(wrapper, trypath, PHP_STREAM_URL_STAT_QUIET, &ssb, NULL)) {
573 return zend_string_init(trypath, strlen(trypath), 0);
574 }
575 if (EG(exception)) {
576 return NULL;
577 }
578 }
579 continue;
580 }
581 }
582 if ((resolved_path = tsrm_realpath_str(actual_path))) {
583 return resolved_path;
584 }
585 } /* end provided path */
586
587 /* check in calling scripts' current working directory as a fall back case
588 */
589 if (zend_is_executing() &&
590 (exec_filename = zend_get_executed_filename_ex()) != NULL) {
591 const char *exec_fname = ZSTR_VAL(exec_filename);
592 size_t exec_fname_length = ZSTR_LEN(exec_filename);
593
594 while ((--exec_fname_length < SIZE_MAX) && !IS_SLASH(exec_fname[exec_fname_length]));
595 if (exec_fname_length > 0 &&
596 filename_length < (MAXPATHLEN - 2) &&
597 exec_fname_length + 1 + filename_length + 1 < MAXPATHLEN) {
598 memcpy(trypath, exec_fname, exec_fname_length + 1);
599 memcpy(trypath+exec_fname_length + 1, filename, filename_length+1);
600 actual_path = trypath;
601
602 /* Check for stream wrapper */
603 for (p = trypath; isalnum((int)*p) || *p == '+' || *p == '-' || *p == '.'; p++);
604 if ((*p == ':') && (p - trypath > 1) && (p[1] == '/') && (p[2] == '/')) {
605 wrapper = php_stream_locate_url_wrapper(trypath, &actual_path, STREAM_OPEN_FOR_INCLUDE);
606 if (!wrapper) {
607 return NULL;
608 } else if (wrapper != &php_plain_files_wrapper) {
609 if (wrapper->wops->url_stat) {
610 php_stream_statbuf ssb;
611
612 if (SUCCESS == wrapper->wops->url_stat(wrapper, trypath, PHP_STREAM_URL_STAT_QUIET, &ssb, NULL)) {
613 return zend_string_init(trypath, strlen(trypath), 0);
614 }
615 if (EG(exception)) {
616 return NULL;
617 }
618 }
619 return NULL;
620 }
621 }
622
623 return tsrm_realpath_str(actual_path);
624 }
625 }
626
627 return NULL;
628 }
629 /* }}} */
630
631 /* {{{ php_fopen_with_path
632 * Tries to open a file with a PATH-style list of directories.
633 * If the filename starts with "." or "/", the path is ignored.
634 */
635 PHPAPI FILE *php_fopen_with_path(const char *filename, const char *mode, const char *path, zend_string **opened_path)
636 {
637 char *pathbuf, *ptr, *end;
638 char trypath[MAXPATHLEN];
639 FILE *fp;
640 size_t filename_length;
641 zend_string *exec_filename;
642
643 if (opened_path) {
644 *opened_path = NULL;
645 }
646
647 if (!filename) {
648 return NULL;
649 }
650
651 filename_length = strlen(filename);
652 #ifndef PHP_WIN32
653 (void) filename_length;
654 #endif
655
656 /* Relative path open */
657 if ((*filename == '.')
658 /* Absolute path open */
659 || IS_ABSOLUTE_PATH(filename, filename_length)
660 || (!path || !*path)
661 ) {
662 return php_fopen_and_set_opened_path(filename, mode, opened_path);
663 }
664
665 /* check in provided path */
666 /* append the calling scripts' current working directory
667 * as a fall back case
668 */
669 if (zend_is_executing() &&
670 (exec_filename = zend_get_executed_filename_ex()) != NULL) {
671 const char *exec_fname = ZSTR_VAL(exec_filename);
672 size_t exec_fname_length = ZSTR_LEN(exec_filename);
673
674 while ((--exec_fname_length < SIZE_MAX) && !IS_SLASH(exec_fname[exec_fname_length]));
675 if ((exec_fname && exec_fname[0] == '[') || exec_fname_length <= 0) {
676 /* [no active file] or no path */
677 pathbuf = estrdup(path);
678 } else {
679 size_t path_length = strlen(path);
680
681 pathbuf = (char *) emalloc(exec_fname_length + path_length + 1 + 1);
682 memcpy(pathbuf, path, path_length);
683 pathbuf[path_length] = DEFAULT_DIR_SEPARATOR;
684 memcpy(pathbuf + path_length + 1, exec_fname, exec_fname_length);
685 pathbuf[path_length + exec_fname_length + 1] = '\0';
686 }
687 } else {
688 pathbuf = estrdup(path);
689 }
690
691 ptr = pathbuf;
692
693 while (ptr && *ptr) {
694 end = strchr(ptr, DEFAULT_DIR_SEPARATOR);
695 if (end != NULL) {
696 *end = '\0';
697 end++;
698 }
699 if (snprintf(trypath, MAXPATHLEN, "%s/%s", ptr, filename) >= MAXPATHLEN) {
700 php_error_docref(NULL, E_NOTICE, "%s/%s path was truncated to %d", ptr, filename, MAXPATHLEN);
701 }
702 fp = php_fopen_and_set_opened_path(trypath, mode, opened_path);
703 if (fp) {
704 efree(pathbuf);
705 return fp;
706 }
707 ptr = end;
708 } /* end provided path */
709
710 efree(pathbuf);
711 return NULL;
712 }
713 /* }}} */
714
715 /* {{{ php_strip_url_passwd */
716 PHPAPI char *php_strip_url_passwd(char *url)
717 {
718 char *p, *url_start;
719
720 if (url == NULL) {
721 return "";
722 }
723
724 p = url;
725
726 while (*p) {
727 if (*p == ':' && *(p + 1) == '/' && *(p + 2) == '/') {
728 /* found protocol */
729 url_start = p = p + 3;
730
731 while (*p) {
732 if (*p == '@') {
733 int i;
734
735 for (i = 0; i < 3 && url_start < p; i++, url_start++) {
736 *url_start = '.';
737 }
738 for (; *p; p++) {
739 *url_start++ = *p;
740 }
741 *url_start=0;
742 break;
743 }
744 p++;
745 }
746 return url;
747 }
748 p++;
749 }
750 return url;
751 }
752 /* }}} */
753
754 /* {{{ expand_filepath */
755 PHPAPI char *expand_filepath(const char *filepath, char *real_path)
756 {
757 return expand_filepath_ex(filepath, real_path, NULL, 0);
758 }
759 /* }}} */
760
761 /* {{{ expand_filepath_ex */
762 PHPAPI char *expand_filepath_ex(const char *filepath, char *real_path, const char *relative_to, size_t relative_to_len)
763 {
764 return expand_filepath_with_mode(filepath, real_path, relative_to, relative_to_len, CWD_FILEPATH);
765 }
766 /* }}} */
767
768 /* {{{ expand_filepath_use_realpath */
769 PHPAPI char *expand_filepath_with_mode(const char *filepath, char *real_path, const char *relative_to, size_t relative_to_len, int realpath_mode)
770 {
771 cwd_state new_state;
772 char cwd[MAXPATHLEN];
773 size_t copy_len;
774 size_t path_len;
775
776 if (!filepath[0]) {
777 return NULL;
778 }
779
780 path_len = strlen(filepath);
781
782 if (IS_ABSOLUTE_PATH(filepath, path_len)) {
783 cwd[0] = '\0';
784 } else {
785 const char *iam = SG(request_info).path_translated;
786 const char *result;
787 if (relative_to) {
788 if (relative_to_len > MAXPATHLEN-1U) {
789 return NULL;
790 }
791 result = relative_to;
792 memcpy(cwd, relative_to, relative_to_len+1U);
793 } else {
794 result = VCWD_GETCWD(cwd, MAXPATHLEN);
795 }
796
797 if (!result && (iam != filepath)) {
798 int fdtest = -1;
799
800 fdtest = VCWD_OPEN(filepath, O_RDONLY);
801 if (fdtest != -1) {
802 /* return a relative file path if for any reason
803 * we cannot cannot getcwd() and the requested,
804 * relatively referenced file is accessible */
805 copy_len = path_len > MAXPATHLEN - 1 ? MAXPATHLEN - 1 : path_len;
806 if (real_path) {
807 memcpy(real_path, filepath, copy_len);
808 real_path[copy_len] = '\0';
809 } else {
810 real_path = estrndup(filepath, copy_len);
811 }
812 close(fdtest);
813 return real_path;
814 } else {
815 cwd[0] = '\0';
816 }
817 } else if (!result) {
818 cwd[0] = '\0';
819 }
820 }
821
822 new_state.cwd = estrdup(cwd);
823 new_state.cwd_length = strlen(cwd);
824
825 if (virtual_file_ex(&new_state, filepath, NULL, realpath_mode)) {
826 efree(new_state.cwd);
827 return NULL;
828 }
829
830 if (real_path) {
831 copy_len = new_state.cwd_length > MAXPATHLEN - 1 ? MAXPATHLEN - 1 : new_state.cwd_length;
832 memcpy(real_path, new_state.cwd, copy_len);
833 real_path[copy_len] = '\0';
834 } else {
835 real_path = estrndup(new_state.cwd, new_state.cwd_length);
836 }
837 efree(new_state.cwd);
838
839 return real_path;
840 }
841 /* }}} */
842
