1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 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 | Jani Taskinen <jani@php.net> |
17 +----------------------------------------------------------------------+
18 */
19
20 /*
21 * This product includes software developed by the Apache Group
22 * for use in the Apache HTTP server project (http://www.apache.org/).
23 *
24 */
25
26 #include <stdio.h>
27 #include "php.h"
28 #include "php_open_temporary_file.h"
29 #include "zend_globals.h"
30 #include "php_globals.h"
31 #include "php_variables.h"
32 #include "rfc1867.h"
33 #include "ext/standard/php_string.h"
34 #include "zend_smart_string.h"
35
36 #if defined(PHP_WIN32) && !defined(HAVE_ATOLL)
37 # define atoll(s) _atoi64(s)
38 # define HAVE_ATOLL 1
39 #endif
40
41 #ifndef DEBUG_FILE_UPLOAD
42 # define DEBUG_FILE_UPLOAD 0
43 #endif
44
dummy_encoding_translation(void)45 static int dummy_encoding_translation(void)
46 {
47 return 0;
48 }
49
50 static char *php_ap_getword(const zend_encoding *encoding, char **line, char stop);
51 static char *php_ap_getword_conf(const zend_encoding *encoding, char *str);
52
53 static php_rfc1867_encoding_translation_t php_rfc1867_encoding_translation = dummy_encoding_translation;
54 static php_rfc1867_get_detect_order_t php_rfc1867_get_detect_order = NULL;
55 static php_rfc1867_set_input_encoding_t php_rfc1867_set_input_encoding = NULL;
56 static php_rfc1867_getword_t php_rfc1867_getword = php_ap_getword;
57 static php_rfc1867_getword_conf_t php_rfc1867_getword_conf = php_ap_getword_conf;
58 static php_rfc1867_basename_t php_rfc1867_basename = NULL;
59
60 PHPAPI int (*php_rfc1867_callback)(unsigned int event, void *event_data, void **extra) = NULL;
61
62 static void safe_php_register_variable(char *var, char *strval, size_t val_len, zval *track_vars_array, zend_bool override_protection);
63
64 /* The longest property name we use in an uploaded file array */
65 #define MAX_SIZE_OF_INDEX sizeof("[tmp_name]")
66
67 /* The longest anonymous name */
68 #define MAX_SIZE_ANONNAME 33
69
70 /* Errors */
71 #define UPLOAD_ERROR_OK 0 /* File upload successful */
72 #define UPLOAD_ERROR_A 1 /* Uploaded file exceeded upload_max_filesize */
73 #define UPLOAD_ERROR_B 2 /* Uploaded file exceeded MAX_FILE_SIZE */
74 #define UPLOAD_ERROR_C 3 /* Partially uploaded */
75 #define UPLOAD_ERROR_D 4 /* No file uploaded */
76 #define UPLOAD_ERROR_E 6 /* Missing /tmp or similar directory */
77 #define UPLOAD_ERROR_F 7 /* Failed to write file to disk */
78 #define UPLOAD_ERROR_X 8 /* File upload stopped by extension */
79
php_rfc1867_register_constants(void)80 void php_rfc1867_register_constants(void) /* {{{ */
81 {
82 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_OK", UPLOAD_ERROR_OK, CONST_CS | CONST_PERSISTENT);
83 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_INI_SIZE", UPLOAD_ERROR_A, CONST_CS | CONST_PERSISTENT);
84 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_FORM_SIZE", UPLOAD_ERROR_B, CONST_CS | CONST_PERSISTENT);
85 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_PARTIAL", UPLOAD_ERROR_C, CONST_CS | CONST_PERSISTENT);
86 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_NO_FILE", UPLOAD_ERROR_D, CONST_CS | CONST_PERSISTENT);
87 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_NO_TMP_DIR", UPLOAD_ERROR_E, CONST_CS | CONST_PERSISTENT);
88 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_CANT_WRITE", UPLOAD_ERROR_F, CONST_CS | CONST_PERSISTENT);
89 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_EXTENSION", UPLOAD_ERROR_X, CONST_CS | CONST_PERSISTENT);
90 }
91 /* }}} */
92
normalize_protected_variable(char * varname)93 static void normalize_protected_variable(char *varname) /* {{{ */
94 {
95 char *s = varname, *index = NULL, *indexend = NULL, *p;
96
97 /* overjump leading space */
98 while (*s == ' ') {
99 s++;
100 }
101
102 /* and remove it */
103 if (s != varname) {
104 memmove(varname, s, strlen(s)+1);
105 }
106
107 for (p = varname; *p && *p != '['; p++) {
108 switch(*p) {
109 case ' ':
110 case '.':
111 *p = '_';
112 break;
113 }
114 }
115
116 /* find index */
117 index = strchr(varname, '[');
118 if (index) {
119 index++;
120 s = index;
121 } else {
122 return;
123 }
124
125 /* done? */
126 while (index) {
127 while (*index == ' ' || *index == '\r' || *index == '\n' || *index=='\t') {
128 index++;
129 }
130 indexend = strchr(index, ']');
131 indexend = indexend ? indexend + 1 : index + strlen(index);
132
133 if (s != index) {
134 memmove(s, index, strlen(index)+1);
135 s += indexend-index;
136 } else {
137 s = indexend;
138 }
139
140 if (*s == '[') {
141 s++;
142 index = s;
143 } else {
144 index = NULL;
145 }
146 }
147 *s = '\0';
148 }
149 /* }}} */
150
add_protected_variable(char * varname)151 static void add_protected_variable(char *varname) /* {{{ */
152 {
153 normalize_protected_variable(varname);
154 zend_hash_str_add_empty_element(&PG(rfc1867_protected_variables), varname, strlen(varname));
155 }
156 /* }}} */
157
is_protected_variable(char * varname)158 static zend_bool is_protected_variable(char *varname) /* {{{ */
159 {
160 normalize_protected_variable(varname);
161 return zend_hash_str_exists(&PG(rfc1867_protected_variables), varname, strlen(varname));
162 }
163 /* }}} */
164
safe_php_register_variable(char * var,char * strval,size_t val_len,zval * track_vars_array,zend_bool override_protection)165 static void safe_php_register_variable(char *var, char *strval, size_t val_len, zval *track_vars_array, zend_bool override_protection) /* {{{ */
166 {
167 if (override_protection || !is_protected_variable(var)) {
168 php_register_variable_safe(var, strval, val_len, track_vars_array);
169 }
170 }
171 /* }}} */
172
safe_php_register_variable_ex(char * var,zval * val,zval * track_vars_array,zend_bool override_protection)173 static void safe_php_register_variable_ex(char *var, zval *val, zval *track_vars_array, zend_bool override_protection) /* {{{ */
174 {
175 if (override_protection || !is_protected_variable(var)) {
176 php_register_variable_ex(var, val, track_vars_array);
177 }
178 }
179 /* }}} */
180
register_http_post_files_variable(char * strvar,char * val,zval * http_post_files,zend_bool override_protection)181 static void register_http_post_files_variable(char *strvar, char *val, zval *http_post_files, zend_bool override_protection) /* {{{ */
182 {
183 safe_php_register_variable(strvar, val, strlen(val), http_post_files, override_protection);
184 }
185 /* }}} */
186
register_http_post_files_variable_ex(char * var,zval * val,zval * http_post_files,zend_bool override_protection)187 static void register_http_post_files_variable_ex(char *var, zval *val, zval *http_post_files, zend_bool override_protection) /* {{{ */
188 {
189 safe_php_register_variable_ex(var, val, http_post_files, override_protection);
190 }
191 /* }}} */
192
free_filename(zval * el)193 static void free_filename(zval *el) {
194 zend_string *filename = Z_STR_P(el);
195 zend_string_release_ex(filename, 0);
196 }
197
destroy_uploaded_files_hash(void)198 PHPAPI void destroy_uploaded_files_hash(void) /* {{{ */
199 {
200 zval *el;
201
202 ZEND_HASH_FOREACH_VAL(SG(rfc1867_uploaded_files), el) {
203 zend_string *filename = Z_STR_P(el);
204 VCWD_UNLINK(ZSTR_VAL(filename));
205 } ZEND_HASH_FOREACH_END();
206 zend_hash_destroy(SG(rfc1867_uploaded_files));
207 FREE_HASHTABLE(SG(rfc1867_uploaded_files));
208 }
209 /* }}} */
210
211 /* {{{ Following code is based on apache_multipart_buffer.c from libapreq-0.33 package. */
212
213 #define FILLUNIT (1024 * 5)
214
215 typedef struct {
216
217 /* read buffer */
218 char *buffer;
219 char *buf_begin;
220 int bufsize;
221 int bytes_in_buffer;
222
223 /* boundary info */
224 char *boundary;
225 char *boundary_next;
226 int boundary_next_len;
227
228 const zend_encoding *input_encoding;
229 const zend_encoding **detect_order;
230 size_t detect_order_size;
231 } multipart_buffer;
232
233 typedef struct {
234 char *key;
235 char *value;
236 } mime_header_entry;
237
238 /*
239 * Fill up the buffer with client data.
240 * Returns number of bytes added to buffer.
241 */
fill_buffer(multipart_buffer * self)242 static int fill_buffer(multipart_buffer *self)
243 {
244 int bytes_to_read, total_read = 0, actual_read = 0;
245
246 /* shift the existing data if necessary */
247 if (self->bytes_in_buffer > 0 && self->buf_begin != self->buffer) {
248 memmove(self->buffer, self->buf_begin, self->bytes_in_buffer);
249 }
250
251 self->buf_begin = self->buffer;
252
253 /* calculate the free space in the buffer */
254 bytes_to_read = self->bufsize - self->bytes_in_buffer;
255
256 /* read the required number of bytes */
257 while (bytes_to_read > 0) {
258
259 char *buf = self->buffer + self->bytes_in_buffer;
260
261 actual_read = (int)sapi_module.read_post(buf, bytes_to_read);
262
263 /* update the buffer length */
264 if (actual_read > 0) {
265 self->bytes_in_buffer += actual_read;
266 SG(read_post_bytes) += actual_read;
267 total_read += actual_read;
268 bytes_to_read -= actual_read;
269 } else {
270 break;
271 }
272 }
273
274 return total_read;
275 }
276
277 /* eof if we are out of bytes, or if we hit the final boundary */
multipart_buffer_eof(multipart_buffer * self)278 static int multipart_buffer_eof(multipart_buffer *self)
279 {
280 return self->bytes_in_buffer == 0 && fill_buffer(self) < 1;
281 }
282
283 /* create new multipart_buffer structure */
multipart_buffer_new(char * boundary,int boundary_len)284 static multipart_buffer *multipart_buffer_new(char *boundary, int boundary_len)
285 {
286 multipart_buffer *self = (multipart_buffer *) ecalloc(1, sizeof(multipart_buffer));
287
288 int minsize = boundary_len + 6;
289 if (minsize < FILLUNIT) minsize = FILLUNIT;
290
291 self->buffer = (char *) ecalloc(1, minsize + 1);
292 self->bufsize = minsize;
293
294 spprintf(&self->boundary, 0, "--%s", boundary);
295
296 self->boundary_next_len = (int)spprintf(&self->boundary_next, 0, "\n--%s", boundary);
297
298 self->buf_begin = self->buffer;
299 self->bytes_in_buffer = 0;
300
301 if (php_rfc1867_encoding_translation()) {
302 php_rfc1867_get_detect_order(&self->detect_order, &self->detect_order_size);
303 } else {
304 self->detect_order = NULL;
305 self->detect_order_size = 0;
306 }
307
308 self->input_encoding = NULL;
309
310 return self;
311 }
312
313 /*
314 * Gets the next CRLF terminated line from the input buffer.
315 * If it doesn't find a CRLF, and the buffer isn't completely full, returns
316 * NULL; otherwise, returns the beginning of the null-terminated line,
317 * minus the CRLF.
318 *
319 * Note that we really just look for LF terminated lines. This works
320 * around a bug in internet explorer for the macintosh which sends mime
321 * boundaries that are only LF terminated when you use an image submit
322 * button in a multipart/form-data form.
323 */
next_line(multipart_buffer * self)324 static char *next_line(multipart_buffer *self)
325 {
326 /* look for LF in the data */
327 char* line = self->buf_begin;
328 char* ptr = memchr(self->buf_begin, '\n', self->bytes_in_buffer);
329
330 if (ptr) { /* LF found */
331
332 /* terminate the string, remove CRLF */
333 if ((ptr - line) > 0 && *(ptr-1) == '\r') {
334 *(ptr-1) = 0;
335 } else {
336 *ptr = 0;
337 }
338
339 /* bump the pointer */
340 self->buf_begin = ptr + 1;
341 self->bytes_in_buffer -= (self->buf_begin - line);
342
343 } else { /* no LF found */
344
345 /* buffer isn't completely full, fail */
346 if (self->bytes_in_buffer < self->bufsize) {
347 return NULL;
348 }
349 /* return entire buffer as a partial line */
350 line[self->bufsize] = 0;
351 self->buf_begin = ptr;
352 self->bytes_in_buffer = 0;
353 }
354
355 return line;
356 }
357
358 /* Returns the next CRLF terminated line from the client */
get_line(multipart_buffer * self)359 static char *get_line(multipart_buffer *self)
360 {
361 char* ptr = next_line(self);
362
363 if (!ptr) {
364 fill_buffer(self);
365 ptr = next_line(self);
366 }
367
368 return ptr;
369 }
370
371 /* Free header entry */
php_free_hdr_entry(mime_header_entry * h)372 static void php_free_hdr_entry(mime_header_entry *h)
373 {
374 if (h->key) {
375 efree(h->key);
376 }
377 if (h->value) {
378 efree(h->value);
379 }
380 }
381
382 /* finds a boundary */
find_boundary(multipart_buffer * self,char * boundary)383 static int find_boundary(multipart_buffer *self, char *boundary)
384 {
385 char *line;
386
387 /* loop through lines */
388 while( (line = get_line(self)) )
389 {
390 /* finished if we found the boundary */
391 if (!strcmp(line, boundary)) {
392 return 1;
393 }
394 }
395
396 /* didn't find the boundary */
397 return 0;
398 }
399
400 /* parse headers */
multipart_buffer_headers(multipart_buffer * self,zend_llist * header)401 static int multipart_buffer_headers(multipart_buffer *self, zend_llist *header)
402 {
403 char *line;
404 mime_header_entry entry = {0};
405 smart_string buf_value = {0};
406 char *key = NULL;
407
408 /* didn't find boundary, abort */
409 if (!find_boundary(self, self->boundary)) {
410 return 0;
411 }
412
413 /* get lines of text, or CRLF_CRLF */
414
415 while ((line = get_line(self)) && line[0] != '\0') {
416 /* add header to table */
417 char *value = NULL;
418
419 if (php_rfc1867_encoding_translation()) {
420 self->input_encoding = zend_multibyte_encoding_detector((const unsigned char *) line, strlen(line), self->detect_order, self->detect_order_size);
421 }
422
423 /* space in the beginning means same header */
424 if (!isspace(line[0])) {
425 value = strchr(line, ':');
426 }
427
428 if (value) {
429 if (buf_value.c && key) {
430 /* new entry, add the old one to the list */
431 smart_string_0(&buf_value);
432 entry.key = key;
433 entry.value = buf_value.c;
434 zend_llist_add_element(header, &entry);
435 buf_value.c = NULL;
436 key = NULL;
437 }
438
439 *value = '\0';
440 do { value++; } while (isspace(*value));
441
442 key = estrdup(line);
443 smart_string_appends(&buf_value, value);
444 } else if (buf_value.c) { /* If no ':' on the line, add to previous line */
445 smart_string_appends(&buf_value, line);
446 } else {
447 continue;
448 }
449 }
450
451 if (buf_value.c && key) {
452 /* add the last one to the list */
453 smart_string_0(&buf_value);
454 entry.key = key;
455 entry.value = buf_value.c;
456 zend_llist_add_element(header, &entry);
457 }
458
459 return 1;
460 }
461
php_mime_get_hdr_value(zend_llist header,char * key)462 static char *php_mime_get_hdr_value(zend_llist header, char *key)
463 {
464 mime_header_entry *entry;
465
466 if (key == NULL) {
467 return NULL;
468 }
469
470 entry = zend_llist_get_first(&header);
471 while (entry) {
472 if (!strcasecmp(entry->key, key)) {
473 return entry->value;
474 }
475 entry = zend_llist_get_next(&header);
476 }
477
478 return NULL;
479 }
480
php_ap_getword(const zend_encoding * encoding,char ** line,char stop)481 static char *php_ap_getword(const zend_encoding *encoding, char **line, char stop)
482 {
483 char *pos = *line, quote;
484 char *res;
485
486 while (*pos && *pos != stop) {
487 if ((quote = *pos) == '"' || quote == '\'') {
488 ++pos;
489 while (*pos && *pos != quote) {
490 if (*pos == '\\' && pos[1] && pos[1] == quote) {
491 pos += 2;
492 } else {
493 ++pos;
494 }
495 }
496 if (*pos) {
497 ++pos;
498 }
499 } else ++pos;
500 }
501 if (*pos == '\0') {
502 res = estrdup(*line);
503 *line += strlen(*line);
504 return res;
505 }
506
507 res = estrndup(*line, pos - *line);
508
509 while (*pos == stop) {
510 ++pos;
511 }
512
513 *line = pos;
514 return res;
515 }
516
substring_conf(char * start,int len,char quote)517 static char *substring_conf(char *start, int len, char quote)
518 {
519 char *result = emalloc(len + 1);
520 char *resp = result;
521 int i;
522
523 for (i = 0; i < len && start[i] != quote; ++i) {
524 if (start[i] == '\\' && (start[i + 1] == '\\' || (quote && start[i + 1] == quote))) {
525 *resp++ = start[++i];
526 } else {
527 *resp++ = start[i];
528 }
529 }
530
531 *resp = '\0';
532 return result;
533 }
534
php_ap_getword_conf(const zend_encoding * encoding,char * str)535 static char *php_ap_getword_conf(const zend_encoding *encoding, char *str)
536 {
537 while (*str && isspace(*str)) {
538 ++str;
539 }
540
541 if (!*str) {
542 return estrdup("");
543 }
544
545 if (*str == '"' || *str == '\'') {
546 char quote = *str;
547
548 str++;
549 return substring_conf(str, (int)strlen(str), quote);
550 } else {
551 char *strend = str;
552
553 while (*strend && !isspace(*strend)) {
554 ++strend;
555 }
556 return substring_conf(str, strend - str, 0);
557 }
558 }
559
php_ap_basename(const zend_encoding * encoding,char * path)560 static char *php_ap_basename(const zend_encoding *encoding, char *path)
561 {
562 char *s = strrchr(path, '\\');
563 char *s2 = strrchr(path, '/');
564
565 if (s && s2) {
566 if (s > s2) {
567 ++s;
568 } else {
569 s = ++s2;
570 }
571 return s;
572 } else if (s) {
573 return ++s;
574 } else if (s2) {
575 return ++s2;
576 }
577 return path;
578 }
579
580 /*
581 * Search for a string in a fixed-length byte string.
582 * If partial is true, partial matches are allowed at the end of the buffer.
583 * Returns NULL if not found, or a pointer to the start of the first match.
584 */
php_ap_memstr(char * haystack,int haystacklen,char * needle,int needlen,int partial)585 static void *php_ap_memstr(char *haystack, int haystacklen, char *needle, int needlen, int partial)
586 {
587 int len = haystacklen;
588 char *ptr = haystack;
589
590 /* iterate through first character matches */
591 while( (ptr = memchr(ptr, needle[0], len)) ) {
592
593 /* calculate length after match */
594 len = haystacklen - (ptr - (char *)haystack);
595
596 /* done if matches up to capacity of buffer */
597 if (memcmp(needle, ptr, needlen < len ? needlen : len) == 0 && (partial || len >= needlen)) {
598 break;
599 }
600
601 /* next character */
602 ptr++; len--;
603 }
604
605 return ptr;
606 }
607
608 /* read until a boundary condition */
multipart_buffer_read(multipart_buffer * self,char * buf,size_t bytes,int * end)609 static size_t multipart_buffer_read(multipart_buffer *self, char *buf, size_t bytes, int *end)
610 {
611 size_t len, max;
612 char *bound;
613
614 /* fill buffer if needed */
615 if (bytes > (size_t)self->bytes_in_buffer) {
616 fill_buffer(self);
617 }
618
619 /* look for a potential boundary match, only read data up to that point */
620 if ((bound = php_ap_memstr(self->buf_begin, self->bytes_in_buffer, self->boundary_next, self->boundary_next_len, 1))) {
621 max = bound - self->buf_begin;
622 if (end && php_ap_memstr(self->buf_begin, self->bytes_in_buffer, self->boundary_next, self->boundary_next_len, 0)) {
623 *end = 1;
624 }
625 } else {
626 max = self->bytes_in_buffer;
627 }
628
629 /* maximum number of bytes we are reading */
630 len = max < bytes-1 ? max : bytes-1;
631
632 /* if we read any data... */
633 if (len > 0) {
634
635 /* copy the data */
636 memcpy(buf, self->buf_begin, len);
637 buf[len] = 0;
638
639 if (bound && len > 0 && buf[len-1] == '\r') {
640 buf[--len] = 0;
641 }
642
643 /* update the buffer */
644 self->bytes_in_buffer -= (int)len;
645 self->buf_begin += len;
646 }
647
648 return len;
649 }
650
651 /*
652 XXX: this is horrible memory-usage-wise, but we only expect
653 to do this on small pieces of form data.
654 */
multipart_buffer_read_body(multipart_buffer * self,size_t * len)655 static char *multipart_buffer_read_body(multipart_buffer *self, size_t *len)
656 {
657 char buf[FILLUNIT], *out=NULL;
658 size_t total_bytes=0, read_bytes=0;
659
660 while((read_bytes = multipart_buffer_read(self, buf, sizeof(buf), NULL))) {
661 out = erealloc(out, total_bytes + read_bytes + 1);
662 memcpy(out + total_bytes, buf, read_bytes);
663 total_bytes += read_bytes;
664 }
665
666 if (out) {
667 out[total_bytes] = '\0';
668 }
669 *len = total_bytes;
670
671 return out;
672 }
673 /* }}} */
674
675 /*
676 * The combined READER/HANDLER
677 *
678 */
679
SAPI_POST_HANDLER_FUNC(rfc1867_post_handler)680 SAPI_API SAPI_POST_HANDLER_FUNC(rfc1867_post_handler) /* {{{ */
681 {
682 char *boundary, *s = NULL, *boundary_end = NULL, *start_arr = NULL, *array_index = NULL;
683 char *lbuf = NULL, *abuf = NULL;
684 zend_string *temp_filename = NULL;
685 int boundary_len = 0, cancel_upload = 0, is_arr_upload = 0;
686 size_t array_len = 0;
687 int64_t total_bytes = 0, max_file_size = 0;
688 int skip_upload = 0, anonindex = 0, is_anonymous;
689 HashTable *uploaded_files = NULL;
690 multipart_buffer *mbuff;
691 zval *array_ptr = (zval *) arg;
692 int fd = -1;
693 zend_llist header;
694 void *event_extra_data = NULL;
695 unsigned int llen = 0;
696 int upload_cnt = INI_INT("max_file_uploads");
697 const zend_encoding *internal_encoding = zend_multibyte_get_internal_encoding();
698 php_rfc1867_getword_t getword;
699 php_rfc1867_getword_conf_t getword_conf;
700 php_rfc1867_basename_t _basename;
701 zend_long count = 0;
702
703 if (php_rfc1867_encoding_translation() && internal_encoding) {
704 getword = php_rfc1867_getword;
705 getword_conf = php_rfc1867_getword_conf;
706 _basename = php_rfc1867_basename;
707 } else {
708 getword = php_ap_getword;
709 getword_conf = php_ap_getword_conf;
710 _basename = php_ap_basename;
711 }
712
713 if (SG(post_max_size) > 0 && SG(request_info).content_length > SG(post_max_size)) {
714 sapi_module.sapi_error(E_WARNING, "POST Content-Length of " ZEND_LONG_FMT " bytes exceeds the limit of " ZEND_LONG_FMT " bytes", SG(request_info).content_length, SG(post_max_size));
715 return;
716 }
717
718 /* Get the boundary */
719 boundary = strstr(content_type_dup, "boundary");
720 if (!boundary) {
721 int content_type_len = (int)strlen(content_type_dup);
722 char *content_type_lcase = estrndup(content_type_dup, content_type_len);
723
724 php_strtolower(content_type_lcase, content_type_len);
725 boundary = strstr(content_type_lcase, "boundary");
726 if (boundary) {
727 boundary = content_type_dup + (boundary - content_type_lcase);
728 }
729 efree(content_type_lcase);
730 }
731
732 if (!boundary || !(boundary = strchr(boundary, '='))) {
733 sapi_module.sapi_error(E_WARNING, "Missing boundary in multipart/form-data POST data");
734 return;
735 }
736
737 boundary++;
738 boundary_len = (int)strlen(boundary);
739
740 if (boundary[0] == '"') {
741 boundary++;
742 boundary_end = strchr(boundary, '"');
743 if (!boundary_end) {
744 sapi_module.sapi_error(E_WARNING, "Invalid boundary in multipart/form-data POST data");
745 return;
746 }
747 } else {
748 /* search for the end of the boundary */
749 boundary_end = strpbrk(boundary, ",;");
750 }
751 if (boundary_end) {
752 boundary_end[0] = '\0';
753 boundary_len = boundary_end-boundary;
754 }
755
756 /* Initialize the buffer */
757 if (!(mbuff = multipart_buffer_new(boundary, boundary_len))) {
758 sapi_module.sapi_error(E_WARNING, "Unable to initialize the input buffer");
759 return;
760 }
761
762 /* Initialize $_FILES[] */
763 zend_hash_init(&PG(rfc1867_protected_variables), 8, NULL, NULL, 0);
764
765 ALLOC_HASHTABLE(uploaded_files);
766 zend_hash_init(uploaded_files, 8, NULL, free_filename, 0);
767 SG(rfc1867_uploaded_files) = uploaded_files;
768
769 if (Z_TYPE(PG(http_globals)[TRACK_VARS_FILES]) != IS_ARRAY) {
770 /* php_auto_globals_create_files() might have already done that */
771 array_init(&PG(http_globals)[TRACK_VARS_FILES]);
772 }
773
774 zend_llist_init(&header, sizeof(mime_header_entry), (llist_dtor_func_t) php_free_hdr_entry, 0);
775
776 if (php_rfc1867_callback != NULL) {
777 multipart_event_start event_start;
778
779 event_start.content_length = SG(request_info).content_length;
780 if (php_rfc1867_callback(MULTIPART_EVENT_START, &event_start, &event_extra_data) == FAILURE) {
781 goto fileupload_done;
782 }
783 }
784
785 while (!multipart_buffer_eof(mbuff))
786 {
787 char buff[FILLUNIT];
788 char *cd = NULL, *param = NULL, *filename = NULL, *tmp = NULL;
789 size_t blen = 0, wlen = 0;
790 zend_off_t offset;
791
792 zend_llist_clean(&header);
793
794 if (!multipart_buffer_headers(mbuff, &header)) {
795 goto fileupload_done;
796 }
797
798 if ((cd = php_mime_get_hdr_value(header, "Content-Disposition"))) {
799 char *pair = NULL;
800 int end = 0;
801
802 while (isspace(*cd)) {
803 ++cd;
804 }
805
806 while (*cd && (pair = getword(mbuff->input_encoding, &cd, ';')))
807 {
808 char *key = NULL, *word = pair;
809
810 while (isspace(*cd)) {
811 ++cd;
812 }
813
814 if (strchr(pair, '=')) {
815 key = getword(mbuff->input_encoding, &pair, '=');
816
817 if (!strcasecmp(key, "name")) {
818 if (param) {
819 efree(param);
820 }
821 param = getword_conf(mbuff->input_encoding, pair);
822 if (mbuff->input_encoding && internal_encoding) {
823 unsigned char *new_param;
824 size_t new_param_len;
825 if ((size_t)-1 != zend_multibyte_encoding_converter(&new_param, &new_param_len, (unsigned char *)param, strlen(param), internal_encoding, mbuff->input_encoding)) {
826 efree(param);
827 param = (char *)new_param;
828 }
829 }
830 } else if (!strcasecmp(key, "filename")) {
831 if (filename) {
832 efree(filename);
833 }
834 filename = getword_conf(mbuff->input_encoding, pair);
835 if (mbuff->input_encoding && internal_encoding) {
836 unsigned char *new_filename;
837 size_t new_filename_len;
838 if ((size_t)-1 != zend_multibyte_encoding_converter(&new_filename, &new_filename_len, (unsigned char *)filename, strlen(filename), internal_encoding, mbuff->input_encoding)) {
839 efree(filename);
840 filename = (char *)new_filename;
841 }
842 }
843 }
844 }
845 if (key) {
846 efree(key);
847 }
848 efree(word);
849 }
850
851 /* Normal form variable, safe to read all data into memory */
852 if (!filename && param) {
853 size_t value_len;
854 char *value = multipart_buffer_read_body(mbuff, &value_len);
855 size_t new_val_len; /* Dummy variable */
856
857 if (!value) {
858 value = estrdup("");
859 value_len = 0;
860 }
861
862 if (mbuff->input_encoding && internal_encoding) {
863 unsigned char *new_value;
864 size_t new_value_len;
865 if ((size_t)-1 != zend_multibyte_encoding_converter(&new_value, &new_value_len, (unsigned char *)value, value_len, internal_encoding, mbuff->input_encoding)) {
866 efree(value);
867 value = (char *)new_value;
868 value_len = new_value_len;
869 }
870 }
871
872 if (++count <= PG(max_input_vars) && sapi_module.input_filter(PARSE_POST, param, &value, value_len, &new_val_len)) {
873 if (php_rfc1867_callback != NULL) {
874 multipart_event_formdata event_formdata;
875 size_t newlength = new_val_len;
876
877 event_formdata.post_bytes_processed = SG(read_post_bytes);
878 event_formdata.name = param;
879 event_formdata.value = &value;
880 event_formdata.length = new_val_len;
881 event_formdata.newlength = &newlength;
882 if (php_rfc1867_callback(MULTIPART_EVENT_FORMDATA, &event_formdata, &event_extra_data) == FAILURE) {
883 efree(param);
884 efree(value);
885 continue;
886 }
887 new_val_len = newlength;
888 }
889 safe_php_register_variable(param, value, new_val_len, array_ptr, 0);
890 } else {
891 if (count == PG(max_input_vars) + 1) {
892 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));
893 }
894
895 if (php_rfc1867_callback != NULL) {
896 multipart_event_formdata event_formdata;
897
898 event_formdata.post_bytes_processed = SG(read_post_bytes);
899 event_formdata.name = param;
900 event_formdata.value = &value;
901 event_formdata.length = value_len;
902 event_formdata.newlength = NULL;
903 php_rfc1867_callback(MULTIPART_EVENT_FORMDATA, &event_formdata, &event_extra_data);
904 }
905 }
906
907 if (!strcasecmp(param, "MAX_FILE_SIZE")) {
908 #ifdef HAVE_ATOLL
909 max_file_size = atoll(value);
910 #else
911 max_file_size = strtoll(value, NULL, 10);
912 #endif
913 }
914
915 efree(param);
916 efree(value);
917 continue;
918 }
919
920 /* If file_uploads=off, skip the file part */
921 if (!PG(file_uploads)) {
922 skip_upload = 1;
923 } else if (upload_cnt <= 0) {
924 skip_upload = 1;
925 sapi_module.sapi_error(E_WARNING, "Maximum number of allowable file uploads has been exceeded");
926 }
927
928 /* Return with an error if the posted data is garbled */
929 if (!param && !filename) {
930 sapi_module.sapi_error(E_WARNING, "File Upload Mime headers garbled");
931 goto fileupload_done;
932 }
933
934 if (!param) {
935 is_anonymous = 1;
936 param = emalloc(MAX_SIZE_ANONNAME);
937 snprintf(param, MAX_SIZE_ANONNAME, "%u", anonindex++);
938 } else {
939 is_anonymous = 0;
940 }
941
942 /* New Rule: never repair potential malicious user input */
943 if (!skip_upload) {
944 long c = 0;
945 tmp = param;
946
947 while (*tmp) {
948 if (*tmp == '[') {
949 c++;
950 } else if (*tmp == ']') {
951 c--;
952 if (tmp[1] && tmp[1] != '[') {
953 skip_upload = 1;
954 break;
955 }
956 }
957 if (c < 0) {
958 skip_upload = 1;
959 break;
960 }
961 tmp++;
962 }
963 /* Brackets should always be closed */
964 if(c != 0) {
965 skip_upload = 1;
966 }
967 }
968
969 total_bytes = cancel_upload = 0;
970 temp_filename = NULL;
971 fd = -1;
972
973 if (!skip_upload && php_rfc1867_callback != NULL) {
974 multipart_event_file_start event_file_start;
975
976 event_file_start.post_bytes_processed = SG(read_post_bytes);
977 event_file_start.name = param;
978 event_file_start.filename = &filename;
979 if (php_rfc1867_callback(MULTIPART_EVENT_FILE_START, &event_file_start, &event_extra_data) == FAILURE) {
980 temp_filename = NULL;
981 efree(param);
982 efree(filename);
983 continue;
984 }
985 }
986
987 if (skip_upload) {
988 efree(param);
989 efree(filename);
990 continue;
991 }
992
993 if (filename[0] == '\0') {
994 #if DEBUG_FILE_UPLOAD
995 sapi_module.sapi_error(E_NOTICE, "No file uploaded");
996 #endif
997 cancel_upload = UPLOAD_ERROR_D;
998 }
999
1000 offset = 0;
1001 end = 0;
1002
1003 if (!cancel_upload) {
1004 /* only bother to open temp file if we have data */
1005 blen = multipart_buffer_read(mbuff, buff, sizeof(buff), &end);
1006 #if DEBUG_FILE_UPLOAD
1007 if (blen > 0) {
1008 #else
1009 /* in non-debug mode we have no problem with 0-length files */
1010 {
1011 #endif
1012 fd = php_open_temporary_fd_ex(PG(upload_tmp_dir), "php", &temp_filename, PHP_TMP_FILE_OPEN_BASEDIR_CHECK_ON_FALLBACK);
1013 upload_cnt--;
1014 if (fd == -1) {
1015 sapi_module.sapi_error(E_WARNING, "File upload error - unable to create a temporary file");
1016 cancel_upload = UPLOAD_ERROR_E;
1017 }
1018 }
1019 }
1020
1021 while (!cancel_upload && (blen > 0))
1022 {
1023 if (php_rfc1867_callback != NULL) {
1024 multipart_event_file_data event_file_data;
1025
1026 event_file_data.post_bytes_processed = SG(read_post_bytes);
1027 event_file_data.offset = offset;
1028 event_file_data.data = buff;
1029 event_file_data.length = blen;
1030 event_file_data.newlength = &blen;
1031 if (php_rfc1867_callback(MULTIPART_EVENT_FILE_DATA, &event_file_data, &event_extra_data) == FAILURE) {
1032 cancel_upload = UPLOAD_ERROR_X;
1033 continue;
1034 }
1035 }
1036
1037 if (PG(upload_max_filesize) > 0 && (zend_long)(total_bytes+blen) > PG(upload_max_filesize)) {
1038 #if DEBUG_FILE_UPLOAD
1039 sapi_module.sapi_error(E_NOTICE, "upload_max_filesize of " ZEND_LONG_FMT " bytes exceeded - file [%s=%s] not saved", PG(upload_max_filesize), param, filename);
1040 #endif
1041 cancel_upload = UPLOAD_ERROR_A;
1042 } else if (max_file_size && ((zend_long)(total_bytes+blen) > max_file_size)) {
1043 #if DEBUG_FILE_UPLOAD
1044 sapi_module.sapi_error(E_NOTICE, "MAX_FILE_SIZE of %" PRId64 " bytes exceeded - file [%s=%s] not saved", max_file_size, param, filename);
1045 #endif
1046 cancel_upload = UPLOAD_ERROR_B;
1047 } else if (blen > 0) {
1048 #ifdef PHP_WIN32
1049 wlen = write(fd, buff, (unsigned int)blen);
1050 #else
1051 wlen = write(fd, buff, blen);
1052 #endif
1053
1054 if (wlen == (size_t)-1) {
1055 /* write failed */
1056 #if DEBUG_FILE_UPLOAD
1057 sapi_module.sapi_error(E_NOTICE, "write() failed - %s", strerror(errno));
1058 #endif
1059 cancel_upload = UPLOAD_ERROR_F;
1060 } else if (wlen < blen) {
1061 #if DEBUG_FILE_UPLOAD
1062 sapi_module.sapi_error(E_NOTICE, "Only %zd bytes were written, expected to write %zd", wlen, blen);
1063 #endif
1064 cancel_upload = UPLOAD_ERROR_F;
1065 } else {
1066 total_bytes += wlen;
1067 }
1068 offset += wlen;
1069 }
1070
1071 /* read data for next iteration */
1072 blen = multipart_buffer_read(mbuff, buff, sizeof(buff), &end);
1073 }
1074
1075 if (fd != -1) { /* may not be initialized if file could not be created */
1076 close(fd);
1077 }
1078
1079 if (!cancel_upload && !end) {
1080 #if DEBUG_FILE_UPLOAD
1081 sapi_module.sapi_error(E_NOTICE, "Missing mime boundary at the end of the data for file %s", filename[0] != '\0' ? filename : "");
1082 #endif
1083 cancel_upload = UPLOAD_ERROR_C;
1084 }
1085 #if DEBUG_FILE_UPLOAD
1086 if (filename[0] != '\0' && total_bytes == 0 && !cancel_upload) {
1087 sapi_module.sapi_error(E_WARNING, "Uploaded file size 0 - file [%s=%s] not saved", param, filename);
1088 cancel_upload = 5;
1089 }
1090 #endif
1091 if (php_rfc1867_callback != NULL) {
1092 multipart_event_file_end event_file_end;
1093
1094 event_file_end.post_bytes_processed = SG(read_post_bytes);
1095 event_file_end.temp_filename = temp_filename ? ZSTR_VAL(temp_filename) : NULL;
1096 event_file_end.cancel_upload = cancel_upload;
1097 if (php_rfc1867_callback(MULTIPART_EVENT_FILE_END, &event_file_end, &event_extra_data) == FAILURE) {
1098 cancel_upload = UPLOAD_ERROR_X;
1099 }
1100 }
1101
1102 if (cancel_upload) {
1103 if (temp_filename) {
1104 if (cancel_upload != UPLOAD_ERROR_E) { /* file creation failed */
1105 unlink(ZSTR_VAL(temp_filename));
1106 }
1107 zend_string_release_ex(temp_filename, 0);
1108 }
1109 temp_filename = NULL;
1110 } else {
1111 zend_hash_add_ptr(SG(rfc1867_uploaded_files), temp_filename, temp_filename);
1112 }
1113
1114 /* is_arr_upload is true when name of file upload field
1115 * ends in [.*]
1116 * start_arr is set to point to 1st [ */
1117 is_arr_upload = (start_arr = strchr(param,'[')) && (param[strlen(param)-1] == ']');
1118
1119 if (is_arr_upload) {
1120 array_len = strlen(start_arr);
1121 if (array_index) {
1122 efree(array_index);
1123 }
1124 array_index = estrndup(start_arr + 1, array_len - 2);
1125 }
1126
1127 /* Add $foo_name */
1128 if (llen < strlen(param) + MAX_SIZE_OF_INDEX + 1) {
1129 llen = (int)strlen(param);
1130 lbuf = (char *) safe_erealloc(lbuf, llen, 1, MAX_SIZE_OF_INDEX + 1);
1131 llen += MAX_SIZE_OF_INDEX + 1;
1132 }
1133
1134 if (is_arr_upload) {
1135 if (abuf) efree(abuf);
1136 abuf = estrndup(param, strlen(param)-array_len);
1137 snprintf(lbuf, llen, "%s_name[%s]", abuf, array_index);
1138 } else {
1139 snprintf(lbuf, llen, "%s_name", param);
1140 }
1141
1142 /* The \ check should technically be needed for win32 systems only where
1143 * it is a valid path separator. However, IE in all it's wisdom always sends
1144 * the full path of the file on the user's filesystem, which means that unless
1145 * the user does basename() they get a bogus file name. Until IE's user base drops
1146 * to nill or problem is fixed this code must remain enabled for all systems. */
1147 s = _basename(internal_encoding, filename);
1148 if (!s) {
1149 s = filename;
1150 }
1151
1152 if (!is_anonymous) {
1153 safe_php_register_variable(lbuf, s, strlen(s), NULL, 0);
1154 }
1155
1156 /* Add $foo[name] */
1157 if (is_arr_upload) {
1158 snprintf(lbuf, llen, "%s[name][%s]", abuf, array_index);
1159 } else {
1160 snprintf(lbuf, llen, "%s[name]", param);
1161 }
1162 register_http_post_files_variable(lbuf, s, &PG(http_globals)[TRACK_VARS_FILES], 0);
1163 efree(filename);
1164 s = NULL;
1165
1166 /* Possible Content-Type: */
1167 if (cancel_upload || !(cd = php_mime_get_hdr_value(header, "Content-Type"))) {
1168 cd = "";
1169 } else {
1170 /* fix for Opera 6.01 */
1171 s = strchr(cd, ';');
1172 if (s != NULL) {
1173 *s = '\0';
1174 }
1175 }
1176
1177 /* Add $foo_type */
1178 if (is_arr_upload) {
1179 snprintf(lbuf, llen, "%s_type[%s]", abuf, array_index);
1180 } else {
1181 snprintf(lbuf, llen, "%s_type", param);
1182 }
1183 if (!is_anonymous) {
1184 safe_php_register_variable(lbuf, cd, strlen(cd), NULL, 0);
1185 }
1186
1187 /* Add $foo[type] */
1188 if (is_arr_upload) {
1189 snprintf(lbuf, llen, "%s[type][%s]", abuf, array_index);
1190 } else {
1191 snprintf(lbuf, llen, "%s[type]", param);
1192 }
1193 register_http_post_files_variable(lbuf, cd, &PG(http_globals)[TRACK_VARS_FILES], 0);
1194
1195 /* Restore Content-Type Header */
1196 if (s != NULL) {
1197 *s = ';';
1198 }
1199 s = "";
1200
1201 {
1202 /* store temp_filename as-is (in case upload_tmp_dir
1203 * contains escapeable characters. escape only the variable name.) */
1204 zval zfilename;
1205
1206 /* Initialize variables */
1207 add_protected_variable(param);
1208
1209 /* if param is of form xxx[.*] this will cut it to xxx */
1210 if (!is_anonymous) {
1211 if (temp_filename) {
1212 ZVAL_STR_COPY(&zfilename, temp_filename);
1213 } else {
1214 ZVAL_EMPTY_STRING(&zfilename);
1215 }
1216 safe_php_register_variable_ex(param, &zfilename, NULL, 1);
1217 }
1218
1219 /* Add $foo[tmp_name] */
1220 if (is_arr_upload) {
1221 snprintf(lbuf, llen, "%s[tmp_name][%s]", abuf, array_index);
1222 } else {
1223 snprintf(lbuf, llen, "%s[tmp_name]", param);
1224 }
1225 add_protected_variable(lbuf);
1226 if (temp_filename) {
1227 ZVAL_STR_COPY(&zfilename, temp_filename);
1228 } else {
1229 ZVAL_EMPTY_STRING(&zfilename);
1230 }
1231 register_http_post_files_variable_ex(lbuf, &zfilename, &PG(http_globals)[TRACK_VARS_FILES], 1);
1232 }
1233
1234 {
1235 zval file_size, error_type;
1236 int size_overflow = 0;
1237 char file_size_buf[65];
1238
1239 ZVAL_LONG(&error_type, cancel_upload);
1240
1241 /* Add $foo[error] */
1242 if (cancel_upload) {
1243 ZVAL_LONG(&file_size, 0);
1244 } else {
1245 if (total_bytes > ZEND_LONG_MAX) {
1246 #ifdef PHP_WIN32
1247 if (_i64toa_s(total_bytes, file_size_buf, 65, 10)) {
1248 file_size_buf[0] = '0';
1249 file_size_buf[1] = '\0';
1250 }
1251 #else
1252 {
1253 int __len = snprintf(file_size_buf, 65, "%" PRId64, total_bytes);
1254 file_size_buf[__len] = '\0';
1255 }
1256 #endif
1257 size_overflow = 1;
1258
1259 } else {
1260 ZVAL_LONG(&file_size, total_bytes);
1261 }
1262 }
1263
1264 if (is_arr_upload) {
1265 snprintf(lbuf, llen, "%s[error][%s]", abuf, array_index);
1266 } else {
1267 snprintf(lbuf, llen, "%s[error]", param);
1268 }
1269 register_http_post_files_variable_ex(lbuf, &error_type, &PG(http_globals)[TRACK_VARS_FILES], 0);
1270
1271 /* Add $foo_size */
1272 if (is_arr_upload) {
1273 snprintf(lbuf, llen, "%s_size[%s]", abuf, array_index);
1274 } else {
1275 snprintf(lbuf, llen, "%s_size", param);
1276 }
1277 if (!is_anonymous) {
1278 if (size_overflow) {
1279 ZVAL_STRING(&file_size, file_size_buf);
1280 }
1281 safe_php_register_variable_ex(lbuf, &file_size, NULL, size_overflow);
1282 }
1283
1284 /* Add $foo[size] */
1285 if (is_arr_upload) {
1286 snprintf(lbuf, llen, "%s[size][%s]", abuf, array_index);
1287 } else {
1288 snprintf(lbuf, llen, "%s[size]", param);
1289 }
1290 if (size_overflow) {
1291 ZVAL_STRING(&file_size, file_size_buf);
1292 }
1293 register_http_post_files_variable_ex(lbuf, &file_size, &PG(http_globals)[TRACK_VARS_FILES], size_overflow);
1294 }
1295 efree(param);
1296 }
1297 }
1298
1299 fileupload_done:
1300 if (php_rfc1867_callback != NULL) {
1301 multipart_event_end event_end;
1302
1303 event_end.post_bytes_processed = SG(read_post_bytes);
1304 php_rfc1867_callback(MULTIPART_EVENT_END, &event_end, &event_extra_data);
1305 }
1306
1307 if (lbuf) efree(lbuf);
1308 if (abuf) efree(abuf);
1309 if (array_index) efree(array_index);
1310 zend_hash_destroy(&PG(rfc1867_protected_variables));
1311 zend_llist_destroy(&header);
1312 if (mbuff->boundary_next) efree(mbuff->boundary_next);
1313 if (mbuff->boundary) efree(mbuff->boundary);
1314 if (mbuff->buffer) efree(mbuff->buffer);
1315 if (mbuff) efree(mbuff);
1316 }
1317 /* }}} */
1318
1319 SAPI_API void php_rfc1867_set_multibyte_callbacks(
1320 php_rfc1867_encoding_translation_t encoding_translation,
1321 php_rfc1867_get_detect_order_t get_detect_order,
1322 php_rfc1867_set_input_encoding_t set_input_encoding,
1323 php_rfc1867_getword_t getword,
1324 php_rfc1867_getword_conf_t getword_conf,
1325 php_rfc1867_basename_t basename) /* {{{ */
1326 {
1327 php_rfc1867_encoding_translation = encoding_translation;
1328 php_rfc1867_get_detect_order = get_detect_order;
1329 php_rfc1867_set_input_encoding = set_input_encoding;
1330 php_rfc1867_getword = getword;
1331 php_rfc1867_getword_conf = getword_conf;
1332 php_rfc1867_basename = basename;
1333 }
1334 /* }}} */
1335
