1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2014 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Rasmus Lerdorf <rasmus@php.net> |
16 | Jani Taskinen <jani@php.net> |
17 +----------------------------------------------------------------------+
18 */
19
20 /* $Id$ */
21
22 /*
23 * This product includes software developed by the Apache Group
24 * for use in the Apache HTTP server project (http://www.apache.org/).
25 *
26 */
27
28 #include <stdio.h>
29 #include "php.h"
30 #include "php_open_temporary_file.h"
31 #include "zend_globals.h"
32 #include "php_globals.h"
33 #include "php_variables.h"
34 #include "rfc1867.h"
35 #include "ext/standard/php_string.h"
36 #include "ext/standard/php_smart_str.h"
37
38 #define DEBUG_FILE_UPLOAD ZEND_DEBUG
39
dummy_encoding_translation(TSRMLS_D)40 static int dummy_encoding_translation(TSRMLS_D)
41 {
42 return 0;
43 }
44
45 static char *php_ap_getword(const zend_encoding *encoding, char **line, char stop TSRMLS_DC);
46 static char *php_ap_getword_conf(const zend_encoding *encoding, char *str TSRMLS_DC);
47
48 static php_rfc1867_encoding_translation_t php_rfc1867_encoding_translation = dummy_encoding_translation;
49 static php_rfc1867_get_detect_order_t php_rfc1867_get_detect_order = NULL;
50 static php_rfc1867_set_input_encoding_t php_rfc1867_set_input_encoding = NULL;
51 static php_rfc1867_getword_t php_rfc1867_getword = php_ap_getword;
52 static php_rfc1867_getword_conf_t php_rfc1867_getword_conf = php_ap_getword_conf;
53 static php_rfc1867_basename_t php_rfc1867_basename = NULL;
54
55 PHPAPI int (*php_rfc1867_callback)(unsigned int event, void *event_data, void **extra TSRMLS_DC) = NULL;
56
57 static void safe_php_register_variable(char *var, char *strval, int val_len, zval *track_vars_array, zend_bool override_protection TSRMLS_DC);
58
59 /* The longest property name we use in an uploaded file array */
60 #define MAX_SIZE_OF_INDEX sizeof("[tmp_name]")
61
62 /* The longest anonymous name */
63 #define MAX_SIZE_ANONNAME 33
64
65 /* Errors */
66 #define UPLOAD_ERROR_OK 0 /* File upload successful */
67 #define UPLOAD_ERROR_A 1 /* Uploaded file exceeded upload_max_filesize */
68 #define UPLOAD_ERROR_B 2 /* Uploaded file exceeded MAX_FILE_SIZE */
69 #define UPLOAD_ERROR_C 3 /* Partially uploaded */
70 #define UPLOAD_ERROR_D 4 /* No file uploaded */
71 #define UPLOAD_ERROR_E 6 /* Missing /tmp or similar directory */
72 #define UPLOAD_ERROR_F 7 /* Failed to write file to disk */
73 #define UPLOAD_ERROR_X 8 /* File upload stopped by extension */
74
php_rfc1867_register_constants(TSRMLS_D)75 void php_rfc1867_register_constants(TSRMLS_D) /* {{{ */
76 {
77 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_OK", UPLOAD_ERROR_OK, CONST_CS | CONST_PERSISTENT);
78 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_INI_SIZE", UPLOAD_ERROR_A, CONST_CS | CONST_PERSISTENT);
79 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_FORM_SIZE", UPLOAD_ERROR_B, CONST_CS | CONST_PERSISTENT);
80 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_PARTIAL", UPLOAD_ERROR_C, CONST_CS | CONST_PERSISTENT);
81 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_NO_FILE", UPLOAD_ERROR_D, CONST_CS | CONST_PERSISTENT);
82 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_NO_TMP_DIR", UPLOAD_ERROR_E, CONST_CS | CONST_PERSISTENT);
83 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_CANT_WRITE", UPLOAD_ERROR_F, CONST_CS | CONST_PERSISTENT);
84 REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_EXTENSION", UPLOAD_ERROR_X, CONST_CS | CONST_PERSISTENT);
85 }
86 /* }}} */
87
normalize_protected_variable(char * varname TSRMLS_DC)88 static void normalize_protected_variable(char *varname TSRMLS_DC) /* {{{ */
89 {
90 char *s = varname, *index = NULL, *indexend = NULL, *p;
91
92 /* overjump leading space */
93 while (*s == ' ') {
94 s++;
95 }
96
97 /* and remove it */
98 if (s != varname) {
99 memmove(varname, s, strlen(s)+1);
100 }
101
102 for (p = varname; *p && *p != '['; p++) {
103 switch(*p) {
104 case ' ':
105 case '.':
106 *p = '_';
107 break;
108 }
109 }
110
111 /* find index */
112 index = strchr(varname, '[');
113 if (index) {
114 index++;
115 s = index;
116 } else {
117 return;
118 }
119
120 /* done? */
121 while (index) {
122 while (*index == ' ' || *index == '\r' || *index == '\n' || *index=='\t') {
123 index++;
124 }
125 indexend = strchr(index, ']');
126 indexend = indexend ? indexend + 1 : index + strlen(index);
127
128 if (s != index) {
129 memmove(s, index, strlen(index)+1);
130 s += indexend-index;
131 } else {
132 s = indexend;
133 }
134
135 if (*s == '[') {
136 s++;
137 index = s;
138 } else {
139 index = NULL;
140 }
141 }
142 *s = '\0';
143 }
144 /* }}} */
145
add_protected_variable(char * varname TSRMLS_DC)146 static void add_protected_variable(char *varname TSRMLS_DC) /* {{{ */
147 {
148 int dummy = 1;
149
150 normalize_protected_variable(varname TSRMLS_CC);
151 zend_hash_add(&PG(rfc1867_protected_variables), varname, strlen(varname)+1, &dummy, sizeof(int), NULL);
152 }
153 /* }}} */
154
is_protected_variable(char * varname TSRMLS_DC)155 static zend_bool is_protected_variable(char *varname TSRMLS_DC) /* {{{ */
156 {
157 normalize_protected_variable(varname TSRMLS_CC);
158 return zend_hash_exists(&PG(rfc1867_protected_variables), varname, strlen(varname)+1);
159 }
160 /* }}} */
161
safe_php_register_variable(char * var,char * strval,int val_len,zval * track_vars_array,zend_bool override_protection TSRMLS_DC)162 static void safe_php_register_variable(char *var, char *strval, int val_len, zval *track_vars_array, zend_bool override_protection TSRMLS_DC) /* {{{ */
163 {
164 if (override_protection || !is_protected_variable(var TSRMLS_CC)) {
165 php_register_variable_safe(var, strval, val_len, track_vars_array TSRMLS_CC);
166 }
167 }
168 /* }}} */
169
safe_php_register_variable_ex(char * var,zval * val,zval * track_vars_array,zend_bool override_protection TSRMLS_DC)170 static void safe_php_register_variable_ex(char *var, zval *val, zval *track_vars_array, zend_bool override_protection TSRMLS_DC) /* {{{ */
171 {
172 if (override_protection || !is_protected_variable(var TSRMLS_CC)) {
173 php_register_variable_ex(var, val, track_vars_array TSRMLS_CC);
174 }
175 }
176 /* }}} */
177
register_http_post_files_variable(char * strvar,char * val,zval * http_post_files,zend_bool override_protection TSRMLS_DC)178 static void register_http_post_files_variable(char *strvar, char *val, zval *http_post_files, zend_bool override_protection TSRMLS_DC) /* {{{ */
179 {
180 safe_php_register_variable(strvar, val, strlen(val), http_post_files, override_protection TSRMLS_CC);
181 }
182 /* }}} */
183
register_http_post_files_variable_ex(char * var,zval * val,zval * http_post_files,zend_bool override_protection TSRMLS_DC)184 static void register_http_post_files_variable_ex(char *var, zval *val, zval *http_post_files, zend_bool override_protection TSRMLS_DC) /* {{{ */
185 {
186 safe_php_register_variable_ex(var, val, http_post_files, override_protection TSRMLS_CC);
187 }
188 /* }}} */
189
unlink_filename(char ** filename TSRMLS_DC)190 static int unlink_filename(char **filename TSRMLS_DC) /* {{{ */
191 {
192 VCWD_UNLINK(*filename);
193 return 0;
194 }
195 /* }}} */
196
destroy_uploaded_files_hash(TSRMLS_D)197 void destroy_uploaded_files_hash(TSRMLS_D) /* {{{ */
198 {
199 zend_hash_apply(SG(rfc1867_uploaded_files), (apply_func_t) unlink_filename TSRMLS_CC);
200 zend_hash_destroy(SG(rfc1867_uploaded_files));
201 FREE_HASHTABLE(SG(rfc1867_uploaded_files));
202 }
203 /* }}} */
204
205 /* {{{ Following code is based on apache_multipart_buffer.c from libapreq-0.33 package. */
206
207 #define FILLUNIT (1024 * 5)
208
209 typedef struct {
210
211 /* read buffer */
212 char *buffer;
213 char *buf_begin;
214 int bufsize;
215 int bytes_in_buffer;
216
217 /* boundary info */
218 char *boundary;
219 char *boundary_next;
220 int boundary_next_len;
221
222 const zend_encoding *input_encoding;
223 const zend_encoding **detect_order;
224 size_t detect_order_size;
225 } multipart_buffer;
226
227 typedef struct {
228 char *key;
229 char *value;
230 } mime_header_entry;
231
232 /*
233 * Fill up the buffer with client data.
234 * Returns number of bytes added to buffer.
235 */
fill_buffer(multipart_buffer * self TSRMLS_DC)236 static int fill_buffer(multipart_buffer *self TSRMLS_DC)
237 {
238 int bytes_to_read, total_read = 0, actual_read = 0;
239
240 /* shift the existing data if necessary */
241 if (self->bytes_in_buffer > 0 && self->buf_begin != self->buffer) {
242 memmove(self->buffer, self->buf_begin, self->bytes_in_buffer);
243 }
244
245 self->buf_begin = self->buffer;
246
247 /* calculate the free space in the buffer */
248 bytes_to_read = self->bufsize - self->bytes_in_buffer;
249
250 /* read the required number of bytes */
251 while (bytes_to_read > 0) {
252
253 char *buf = self->buffer + self->bytes_in_buffer;
254
255 actual_read = sapi_module.read_post(buf, bytes_to_read TSRMLS_CC);
256
257 /* update the buffer length */
258 if (actual_read > 0) {
259 self->bytes_in_buffer += actual_read;
260 SG(read_post_bytes) += actual_read;
261 total_read += actual_read;
262 bytes_to_read -= actual_read;
263 } else {
264 break;
265 }
266 }
267
268 return total_read;
269 }
270
271 /* eof if we are out of bytes, or if we hit the final boundary */
multipart_buffer_eof(multipart_buffer * self TSRMLS_DC)272 static int multipart_buffer_eof(multipart_buffer *self TSRMLS_DC)
273 {
274 if ( (self->bytes_in_buffer == 0 && fill_buffer(self TSRMLS_CC) < 1) ) {
275 return 1;
276 } else {
277 return 0;
278 }
279 }
280
281 /* create new multipart_buffer structure */
multipart_buffer_new(char * boundary,int boundary_len TSRMLS_DC)282 static multipart_buffer *multipart_buffer_new(char *boundary, int boundary_len TSRMLS_DC)
283 {
284 multipart_buffer *self = (multipart_buffer *) ecalloc(1, sizeof(multipart_buffer));
285
286 int minsize = boundary_len + 6;
287 if (minsize < FILLUNIT) minsize = FILLUNIT;
288
289 self->buffer = (char *) ecalloc(1, minsize + 1);
290 self->bufsize = minsize;
291
292 spprintf(&self->boundary, 0, "--%s", boundary);
293
294 self->boundary_next_len = spprintf(&self->boundary_next, 0, "\n--%s", boundary);
295
296 self->buf_begin = self->buffer;
297 self->bytes_in_buffer = 0;
298
299 if (php_rfc1867_encoding_translation(TSRMLS_C)) {
300 php_rfc1867_get_detect_order(&self->detect_order, &self->detect_order_size TSRMLS_CC);
301 } else {
302 self->detect_order = NULL;
303 self->detect_order_size = 0;
304 }
305
306 self->input_encoding = NULL;
307
308 return self;
309 }
310
311 /*
312 * Gets the next CRLF terminated line from the input buffer.
313 * If it doesn't find a CRLF, and the buffer isn't completely full, returns
314 * NULL; otherwise, returns the beginning of the null-terminated line,
315 * minus the CRLF.
316 *
317 * Note that we really just look for LF terminated lines. This works
318 * around a bug in internet explorer for the macintosh which sends mime
319 * boundaries that are only LF terminated when you use an image submit
320 * button in a multipart/form-data form.
321 */
next_line(multipart_buffer * self)322 static char *next_line(multipart_buffer *self)
323 {
324 /* look for LF in the data */
325 char* line = self->buf_begin;
326 char* ptr = memchr(self->buf_begin, '\n', self->bytes_in_buffer);
327
328 if (ptr) { /* LF found */
329
330 /* terminate the string, remove CRLF */
331 if ((ptr - line) > 0 && *(ptr-1) == '\r') {
332 *(ptr-1) = 0;
333 } else {
334 *ptr = 0;
335 }
336
337 /* bump the pointer */
338 self->buf_begin = ptr + 1;
339 self->bytes_in_buffer -= (self->buf_begin - line);
340
341 } else { /* no LF found */
342
343 /* buffer isn't completely full, fail */
344 if (self->bytes_in_buffer < self->bufsize) {
345 return NULL;
346 }
347 /* return entire buffer as a partial line */
348 line[self->bufsize] = 0;
349 self->buf_begin = ptr;
350 self->bytes_in_buffer = 0;
351 }
352
353 return line;
354 }
355
356 /* Returns the next CRLF terminated line from the client */
get_line(multipart_buffer * self TSRMLS_DC)357 static char *get_line(multipart_buffer *self TSRMLS_DC)
358 {
359 char* ptr = next_line(self);
360
361 if (!ptr) {
362 fill_buffer(self TSRMLS_CC);
363 ptr = next_line(self);
364 }
365
366 return ptr;
367 }
368
369 /* Free header entry */
php_free_hdr_entry(mime_header_entry * h)370 static void php_free_hdr_entry(mime_header_entry *h)
371 {
372 if (h->key) {
373 efree(h->key);
374 }
375 if (h->value) {
376 efree(h->value);
377 }
378 }
379
380 /* finds a boundary */
find_boundary(multipart_buffer * self,char * boundary TSRMLS_DC)381 static int find_boundary(multipart_buffer *self, char *boundary TSRMLS_DC)
382 {
383 char *line;
384
385 /* loop thru lines */
386 while( (line = get_line(self TSRMLS_CC)) )
387 {
388 /* finished if we found the boundary */
389 if (!strcmp(line, boundary)) {
390 return 1;
391 }
392 }
393
394 /* didn't find the boundary */
395 return 0;
396 }
397
398 /* parse headers */
multipart_buffer_headers(multipart_buffer * self,zend_llist * header TSRMLS_DC)399 static int multipart_buffer_headers(multipart_buffer *self, zend_llist *header TSRMLS_DC)
400 {
401 char *line;
402 mime_header_entry entry = {0};
403 smart_str buf_value = {0};
404 char *key = NULL;
405
406 /* didn't find boundary, abort */
407 if (!find_boundary(self, self->boundary TSRMLS_CC)) {
408 return 0;
409 }
410
411 /* get lines of text, or CRLF_CRLF */
412
413 while( (line = get_line(self TSRMLS_CC)) && strlen(line) > 0 )
414 {
415 /* add header to table */
416 char *value = NULL;
417
418 if (php_rfc1867_encoding_translation(TSRMLS_C)) {
419 self->input_encoding = zend_multibyte_encoding_detector((unsigned char *)line, strlen(line), self->detect_order, self->detect_order_size TSRMLS_CC);
420 }
421
422 /* space in the beginning means same header */
423 if (!isspace(line[0])) {
424 value = strchr(line, ':');
425 }
426
427 if (value) {
428 if(buf_value.c && key) {
429 /* new entry, add the old one to the list */
430 smart_str_0(&buf_value);
431 entry.key = key;
432 entry.value = buf_value.c;
433 zend_llist_add_element(header, &entry);
434 buf_value.c = NULL;
435 key = NULL;
436 }
437
438 *value = '\0';
439 do { value++; } while(isspace(*value));
440
441 key = estrdup(line);
442 smart_str_appends(&buf_value, value);
443 } else if (buf_value.c) { /* If no ':' on the line, add to previous line */
444 smart_str_appends(&buf_value, line);
445 } else {
446 continue;
447 }
448 }
449 if(buf_value.c && key) {
450 /* add the last one to the list */
451 smart_str_0(&buf_value);
452 entry.key = key;
453 entry.value = buf_value.c;
454 zend_llist_add_element(header, &entry);
455 }
456
457 return 1;
458 }
459
php_mime_get_hdr_value(zend_llist header,char * key)460 static char *php_mime_get_hdr_value(zend_llist header, char *key)
461 {
462 mime_header_entry *entry;
463
464 if (key == NULL) {
465 return NULL;
466 }
467
468 entry = zend_llist_get_first(&header);
469 while (entry) {
470 if (!strcasecmp(entry->key, key)) {
471 return entry->value;
472 }
473 entry = zend_llist_get_next(&header);
474 }
475
476 return NULL;
477 }
478
php_ap_getword(const zend_encoding * encoding,char ** line,char stop TSRMLS_DC)479 static char *php_ap_getword(const zend_encoding *encoding, char **line, char stop TSRMLS_DC)
480 {
481 char *pos = *line, quote;
482 char *res;
483
484 while (*pos && *pos != stop) {
485 if ((quote = *pos) == '"' || quote == '\'') {
486 ++pos;
487 while (*pos && *pos != quote) {
488 if (*pos == '\\' && pos[1] && pos[1] == quote) {
489 pos += 2;
490 } else {
491 ++pos;
492 }
493 }
494 if (*pos) {
495 ++pos;
496 }
497 } else ++pos;
498 }
499 if (*pos == '\0') {
500 res = estrdup(*line);
501 *line += strlen(*line);
502 return res;
503 }
504
505 res = estrndup(*line, pos - *line);
506
507 while (*pos == stop) {
508 ++pos;
509 }
510
511 *line = pos;
512 return res;
513 }
514
substring_conf(char * start,int len,char quote)515 static char *substring_conf(char *start, int len, char quote)
516 {
517 char *result = emalloc(len + 1);
518 char *resp = result;
519 int i;
520
521 for (i = 0; i < len && start[i] != quote; ++i) {
522 if (start[i] == '\\' && (start[i + 1] == '\\' || (quote && start[i + 1] == quote))) {
523 *resp++ = start[++i];
524 } else {
525 *resp++ = start[i];
526 }
527 }
528
529 *resp = '\0';
530 return result;
531 }
532
php_ap_getword_conf(const zend_encoding * encoding,char * str TSRMLS_DC)533 static char *php_ap_getword_conf(const zend_encoding *encoding, char *str TSRMLS_DC)
534 {
535 while (*str && isspace(*str)) {
536 ++str;
537 }
538
539 if (!*str) {
540 return estrdup("");
541 }
542
543 if (*str == '"' || *str == '\'') {
544 char quote = *str;
545
546 str++;
547 return substring_conf(str, strlen(str), quote);
548 } else {
549 char *strend = str;
550
551 while (*strend && !isspace(*strend)) {
552 ++strend;
553 }
554 return substring_conf(str, strend - str, 0);
555 }
556 }
557
php_ap_basename(const zend_encoding * encoding,char * path TSRMLS_DC)558 static char *php_ap_basename(const zend_encoding *encoding, char *path TSRMLS_DC)
559 {
560 char *s = strrchr(path, '\\');
561 char *s2 = strrchr(path, '/');
562
563 if (s && s2) {
564 if (s > s2) {
565 ++s;
566 } else {
567 s = ++s2;
568 }
569 return s;
570 } else if (s) {
571 return ++s;
572 } else if (s2) {
573 return ++s2;
574 }
575 return path;
576 }
577
578 /*
579 * Search for a string in a fixed-length byte string.
580 * If partial is true, partial matches are allowed at the end of the buffer.
581 * Returns NULL if not found, or a pointer to the start of the first match.
582 */
php_ap_memstr(char * haystack,int haystacklen,char * needle,int needlen,int partial)583 static void *php_ap_memstr(char *haystack, int haystacklen, char *needle, int needlen, int partial)
584 {
585 int len = haystacklen;
586 char *ptr = haystack;
587
588 /* iterate through first character matches */
589 while( (ptr = memchr(ptr, needle[0], len)) ) {
590
591 /* calculate length after match */
592 len = haystacklen - (ptr - (char *)haystack);
593
594 /* done if matches up to capacity of buffer */
595 if (memcmp(needle, ptr, needlen < len ? needlen : len) == 0 && (partial || len >= needlen)) {
596 break;
597 }
598
599 /* next character */
600 ptr++; len--;
601 }
602
603 return ptr;
604 }
605
606 /* read until a boundary condition */
multipart_buffer_read(multipart_buffer * self,char * buf,int bytes,int * end TSRMLS_DC)607 static int multipart_buffer_read(multipart_buffer *self, char *buf, int bytes, int *end TSRMLS_DC)
608 {
609 int len, max;
610 char *bound;
611
612 /* fill buffer if needed */
613 if (bytes > self->bytes_in_buffer) {
614 fill_buffer(self TSRMLS_CC);
615 }
616
617 /* look for a potential boundary match, only read data up to that point */
618 if ((bound = php_ap_memstr(self->buf_begin, self->bytes_in_buffer, self->boundary_next, self->boundary_next_len, 1))) {
619 max = bound - self->buf_begin;
620 if (end && php_ap_memstr(self->buf_begin, self->bytes_in_buffer, self->boundary_next, self->boundary_next_len, 0)) {
621 *end = 1;
622 }
623 } else {
624 max = self->bytes_in_buffer;
625 }
626
627 /* maximum number of bytes we are reading */
628 len = max < bytes-1 ? max : bytes-1;
629
630 /* if we read any data... */
631 if (len > 0) {
632
633 /* copy the data */
634 memcpy(buf, self->buf_begin, len);
635 buf[len] = 0;
636
637 if (bound && len > 0 && buf[len-1] == '\r') {
638 buf[--len] = 0;
639 }
640
641 /* update the buffer */
642 self->bytes_in_buffer -= len;
643 self->buf_begin += len;
644 }
645
646 return len;
647 }
648
649 /*
650 XXX: this is horrible memory-usage-wise, but we only expect
651 to do this on small pieces of form data.
652 */
multipart_buffer_read_body(multipart_buffer * self,unsigned int * len TSRMLS_DC)653 static char *multipart_buffer_read_body(multipart_buffer *self, unsigned int *len TSRMLS_DC)
654 {
655 char buf[FILLUNIT], *out=NULL;
656 int total_bytes=0, read_bytes=0;
657
658 while((read_bytes = multipart_buffer_read(self, buf, sizeof(buf), NULL TSRMLS_CC))) {
659 out = erealloc(out, total_bytes + read_bytes + 1);
660 memcpy(out + total_bytes, buf, read_bytes);
661 total_bytes += read_bytes;
662 }
663
664 if (out) {
665 out[total_bytes] = '\0';
666 }
667 *len = total_bytes;
668
669 return out;
670 }
671 /* }}} */
672
673 /*
674 * The combined READER/HANDLER
675 *
676 */
677
SAPI_POST_HANDLER_FUNC(rfc1867_post_handler)678 SAPI_API SAPI_POST_HANDLER_FUNC(rfc1867_post_handler) /* {{{ */
679 {
680 char *boundary, *s = NULL, *boundary_end = NULL, *start_arr = NULL, *array_index = NULL;
681 char *temp_filename = NULL, *lbuf = NULL, *abuf = NULL;
682 int boundary_len = 0, total_bytes = 0, cancel_upload = 0, is_arr_upload = 0, array_len = 0;
683 int max_file_size = 0, skip_upload = 0, anonindex = 0, is_anonymous;
684 zval *http_post_files = NULL;
685 HashTable *uploaded_files = NULL;
686 multipart_buffer *mbuff;
687 zval *array_ptr = (zval *) arg;
688 int fd = -1;
689 zend_llist header;
690 void *event_extra_data = NULL;
691 unsigned int llen = 0;
692 int upload_cnt = INI_INT("max_file_uploads");
693 const zend_encoding *internal_encoding = zend_multibyte_get_internal_encoding(TSRMLS_C);
694 php_rfc1867_getword_t getword;
695 php_rfc1867_getword_conf_t getword_conf;
696 php_rfc1867_basename_t _basename;
697 long count = 0;
698
699 if (php_rfc1867_encoding_translation(TSRMLS_C) && internal_encoding) {
700 getword = php_rfc1867_getword;
701 getword_conf = php_rfc1867_getword_conf;
702 _basename = php_rfc1867_basename;
703 } else {
704 getword = php_ap_getword;
705 getword_conf = php_ap_getword_conf;
706 _basename = php_ap_basename;
707 }
708
709 if (SG(post_max_size) > 0 && SG(request_info).content_length > SG(post_max_size)) {
710 sapi_module.sapi_error(E_WARNING, "POST Content-Length of %ld bytes exceeds the limit of %ld bytes", SG(request_info).content_length, SG(post_max_size));
711 return;
712 }
713
714 /* Get the boundary */
715 boundary = strstr(content_type_dup, "boundary");
716 if (!boundary) {
717 int content_type_len = strlen(content_type_dup);
718 char *content_type_lcase = estrndup(content_type_dup, content_type_len);
719
720 php_strtolower(content_type_lcase, content_type_len);
721 boundary = strstr(content_type_lcase, "boundary");
722 if (boundary) {
723 boundary = content_type_dup + (boundary - content_type_lcase);
724 }
725 efree(content_type_lcase);
726 }
727
728 if (!boundary || !(boundary = strchr(boundary, '='))) {
729 sapi_module.sapi_error(E_WARNING, "Missing boundary in multipart/form-data POST data");
730 return;
731 }
732
733 boundary++;
734 boundary_len = strlen(boundary);
735
736 if (boundary[0] == '"') {
737 boundary++;
738 boundary_end = strchr(boundary, '"');
739 if (!boundary_end) {
740 sapi_module.sapi_error(E_WARNING, "Invalid boundary in multipart/form-data POST data");
741 return;
742 }
743 } else {
744 /* search for the end of the boundary */
745 boundary_end = strpbrk(boundary, ",;");
746 }
747 if (boundary_end) {
748 boundary_end[0] = '\0';
749 boundary_len = boundary_end-boundary;
750 }
751
752 /* Initialize the buffer */
753 if (!(mbuff = multipart_buffer_new(boundary, boundary_len TSRMLS_CC))) {
754 sapi_module.sapi_error(E_WARNING, "Unable to initialize the input buffer");
755 return;
756 }
757
758 /* Initialize $_FILES[] */
759 zend_hash_init(&PG(rfc1867_protected_variables), 5, NULL, NULL, 0);
760
761 ALLOC_HASHTABLE(uploaded_files);
762 zend_hash_init(uploaded_files, 5, NULL, (dtor_func_t) free_estring, 0);
763 SG(rfc1867_uploaded_files) = uploaded_files;
764
765 ALLOC_ZVAL(http_post_files);
766 array_init(http_post_files);
767 INIT_PZVAL(http_post_files);
768 PG(http_globals)[TRACK_VARS_FILES] = http_post_files;
769
770 zend_llist_init(&header, sizeof(mime_header_entry), (llist_dtor_func_t) php_free_hdr_entry, 0);
771
772 if (php_rfc1867_callback != NULL) {
773 multipart_event_start event_start;
774
775 event_start.content_length = SG(request_info).content_length;
776 if (php_rfc1867_callback(MULTIPART_EVENT_START, &event_start, &event_extra_data TSRMLS_CC) == FAILURE) {
777 goto fileupload_done;
778 }
779 }
780
781 while (!multipart_buffer_eof(mbuff TSRMLS_CC))
782 {
783 char buff[FILLUNIT];
784 char *cd = NULL, *param = NULL, *filename = NULL, *tmp = NULL;
785 size_t blen = 0, wlen = 0;
786 off_t offset;
787
788 zend_llist_clean(&header);
789
790 if (!multipart_buffer_headers(mbuff, &header TSRMLS_CC)) {
791 goto fileupload_done;
792 }
793
794 if ((cd = php_mime_get_hdr_value(header, "Content-Disposition"))) {
795 char *pair = NULL;
796 int end = 0;
797
798 while (isspace(*cd)) {
799 ++cd;
800 }
801
802 while (*cd && (pair = getword(mbuff->input_encoding, &cd, ';' TSRMLS_CC)))
803 {
804 char *key = NULL, *word = pair;
805
806 while (isspace(*cd)) {
807 ++cd;
808 }
809
810 if (strchr(pair, '=')) {
811 key = getword(mbuff->input_encoding, &pair, '=' TSRMLS_CC);
812
813 if (!strcasecmp(key, "name")) {
814 if (param) {
815 efree(param);
816 }
817 param = getword_conf(mbuff->input_encoding, pair TSRMLS_CC);
818 if (mbuff->input_encoding && internal_encoding) {
819 unsigned char *new_param;
820 size_t new_param_len;
821 if ((size_t)-1 != zend_multibyte_encoding_converter(&new_param, &new_param_len, (unsigned char *)param, strlen(param), internal_encoding, mbuff->input_encoding TSRMLS_CC)) {
822 efree(param);
823 param = (char *)new_param;
824 }
825 }
826 } else if (!strcasecmp(key, "filename")) {
827 if (filename) {
828 efree(filename);
829 }
830 filename = getword_conf(mbuff->input_encoding, pair TSRMLS_CC);
831 if (mbuff->input_encoding && internal_encoding) {
832 unsigned char *new_filename;
833 size_t new_filename_len;
834 if ((size_t)-1 != zend_multibyte_encoding_converter(&new_filename, &new_filename_len, (unsigned char *)filename, strlen(filename), internal_encoding, mbuff->input_encoding TSRMLS_CC)) {
835 efree(filename);
836 filename = (char *)new_filename;
837 }
838 }
839 }
840 }
841 if (key) {
842 efree(key);
843 }
844 efree(word);
845 }
846
847 /* Normal form variable, safe to read all data into memory */
848 if (!filename && param) {
849 unsigned int value_len;
850 char *value = multipart_buffer_read_body(mbuff, &value_len TSRMLS_CC);
851 unsigned int new_val_len; /* Dummy variable */
852
853 if (!value) {
854 value = estrdup("");
855 value_len = 0;
856 }
857
858 if (mbuff->input_encoding && internal_encoding) {
859 unsigned char *new_value;
860 size_t new_value_len;
861 if ((size_t)-1 != zend_multibyte_encoding_converter(&new_value, &new_value_len, (unsigned char *)value, value_len, internal_encoding, mbuff->input_encoding TSRMLS_CC)) {
862 efree(value);
863 value = (char *)new_value;
864 value_len = new_value_len;
865 }
866 }
867
868 if (++count <= PG(max_input_vars) && sapi_module.input_filter(PARSE_POST, param, &value, value_len, &new_val_len TSRMLS_CC)) {
869 if (php_rfc1867_callback != NULL) {
870 multipart_event_formdata event_formdata;
871 size_t newlength = new_val_len;
872
873 event_formdata.post_bytes_processed = SG(read_post_bytes);
874 event_formdata.name = param;
875 event_formdata.value = &value;
876 event_formdata.length = new_val_len;
877 event_formdata.newlength = &newlength;
878 if (php_rfc1867_callback(MULTIPART_EVENT_FORMDATA, &event_formdata, &event_extra_data TSRMLS_CC) == FAILURE) {
879 efree(param);
880 efree(value);
881 continue;
882 }
883 new_val_len = newlength;
884 }
885 safe_php_register_variable(param, value, new_val_len, array_ptr, 0 TSRMLS_CC);
886 } else {
887 if (count == PG(max_input_vars) + 1) {
888 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Input variables exceeded %ld. To increase the limit change max_input_vars in php.ini.", PG(max_input_vars));
889 }
890
891 if (php_rfc1867_callback != NULL) {
892 multipart_event_formdata event_formdata;
893
894 event_formdata.post_bytes_processed = SG(read_post_bytes);
895 event_formdata.name = param;
896 event_formdata.value = &value;
897 event_formdata.length = value_len;
898 event_formdata.newlength = NULL;
899 php_rfc1867_callback(MULTIPART_EVENT_FORMDATA, &event_formdata, &event_extra_data TSRMLS_CC);
900 }
901 }
902
903 if (!strcasecmp(param, "MAX_FILE_SIZE")) {
904 max_file_size = atol(value);
905 }
906
907 efree(param);
908 efree(value);
909 continue;
910 }
911
912 /* If file_uploads=off, skip the file part */
913 if (!PG(file_uploads)) {
914 skip_upload = 1;
915 } else if (upload_cnt <= 0) {
916 skip_upload = 1;
917 sapi_module.sapi_error(E_WARNING, "Maximum number of allowable file uploads has been exceeded");
918 }
919
920 /* Return with an error if the posted data is garbled */
921 if (!param && !filename) {
922 sapi_module.sapi_error(E_WARNING, "File Upload Mime headers garbled");
923 goto fileupload_done;
924 }
925
926 if (!param) {
927 is_anonymous = 1;
928 param = emalloc(MAX_SIZE_ANONNAME);
929 snprintf(param, MAX_SIZE_ANONNAME, "%u", anonindex++);
930 } else {
931 is_anonymous = 0;
932 }
933
934 /* New Rule: never repair potential malicious user input */
935 if (!skip_upload) {
936 long c = 0;
937 tmp = param;
938
939 while (*tmp) {
940 if (*tmp == '[') {
941 c++;
942 } else if (*tmp == ']') {
943 c--;
944 if (tmp[1] && tmp[1] != '[') {
945 skip_upload = 1;
946 break;
947 }
948 }
949 if (c < 0) {
950 skip_upload = 1;
951 break;
952 }
953 tmp++;
954 }
955 /* Brackets should always be closed */
956 if(c != 0) {
957 skip_upload = 1;
958 }
959 }
960
961 total_bytes = cancel_upload = 0;
962 temp_filename = NULL;
963 fd = -1;
964
965 if (!skip_upload && php_rfc1867_callback != NULL) {
966 multipart_event_file_start event_file_start;
967
968 event_file_start.post_bytes_processed = SG(read_post_bytes);
969 event_file_start.name = param;
970 event_file_start.filename = &filename;
971 if (php_rfc1867_callback(MULTIPART_EVENT_FILE_START, &event_file_start, &event_extra_data TSRMLS_CC) == FAILURE) {
972 temp_filename = "";
973 efree(param);
974 efree(filename);
975 continue;
976 }
977 }
978
979 if (skip_upload) {
980 efree(param);
981 efree(filename);
982 continue;
983 }
984
985 if (strlen(filename) == 0) {
986 #if DEBUG_FILE_UPLOAD
987 sapi_module.sapi_error(E_NOTICE, "No file uploaded");
988 #endif
989 cancel_upload = UPLOAD_ERROR_D;
990 }
991
992 offset = 0;
993 end = 0;
994
995 if (!cancel_upload) {
996 /* only bother to open temp file if we have data */
997 blen = multipart_buffer_read(mbuff, buff, sizeof(buff), &end TSRMLS_CC);
998 #if DEBUG_FILE_UPLOAD
999 if (blen > 0) {
1000 #else
1001 /* in non-debug mode we have no problem with 0-length files */
1002 {
1003 #endif
1004 fd = php_open_temporary_fd_ex(PG(upload_tmp_dir), "php", &temp_filename, 1 TSRMLS_CC);
1005 upload_cnt--;
1006 if (fd == -1) {
1007 sapi_module.sapi_error(E_WARNING, "File upload error - unable to create a temporary file");
1008 cancel_upload = UPLOAD_ERROR_E;
1009 }
1010 }
1011 }
1012
1013 while (!cancel_upload && (blen > 0))
1014 {
1015 if (php_rfc1867_callback != NULL) {
1016 multipart_event_file_data event_file_data;
1017
1018 event_file_data.post_bytes_processed = SG(read_post_bytes);
1019 event_file_data.offset = offset;
1020 event_file_data.data = buff;
1021 event_file_data.length = blen;
1022 event_file_data.newlength = &blen;
1023 if (php_rfc1867_callback(MULTIPART_EVENT_FILE_DATA, &event_file_data, &event_extra_data TSRMLS_CC) == FAILURE) {
1024 cancel_upload = UPLOAD_ERROR_X;
1025 continue;
1026 }
1027 }
1028
1029 if (PG(upload_max_filesize) > 0 && (long)(total_bytes+blen) > PG(upload_max_filesize)) {
1030 #if DEBUG_FILE_UPLOAD
1031 sapi_module.sapi_error(E_NOTICE, "upload_max_filesize of %ld bytes exceeded - file [%s=%s] not saved", PG(upload_max_filesize), param, filename);
1032 #endif
1033 cancel_upload = UPLOAD_ERROR_A;
1034 } else if (max_file_size && ((long)(total_bytes+blen) > max_file_size)) {
1035 #if DEBUG_FILE_UPLOAD
1036 sapi_module.sapi_error(E_NOTICE, "MAX_FILE_SIZE of %ld bytes exceeded - file [%s=%s] not saved", max_file_size, param, filename);
1037 #endif
1038 cancel_upload = UPLOAD_ERROR_B;
1039 } else if (blen > 0) {
1040 wlen = write(fd, buff, blen);
1041
1042 if (wlen == -1) {
1043 /* write failed */
1044 #if DEBUG_FILE_UPLOAD
1045 sapi_module.sapi_error(E_NOTICE, "write() failed - %s", strerror(errno));
1046 #endif
1047 cancel_upload = UPLOAD_ERROR_F;
1048 } else if (wlen < blen) {
1049 #if DEBUG_FILE_UPLOAD
1050 sapi_module.sapi_error(E_NOTICE, "Only %d bytes were written, expected to write %d", wlen, blen);
1051 #endif
1052 cancel_upload = UPLOAD_ERROR_F;
1053 } else {
1054 total_bytes += wlen;
1055 }
1056 offset += wlen;
1057 }
1058
1059 /* read data for next iteration */
1060 blen = multipart_buffer_read(mbuff, buff, sizeof(buff), &end TSRMLS_CC);
1061 }
1062
1063 if (fd != -1) { /* may not be initialized if file could not be created */
1064 close(fd);
1065 }
1066
1067 if (!cancel_upload && !end) {
1068 #if DEBUG_FILE_UPLOAD
1069 sapi_module.sapi_error(E_NOTICE, "Missing mime boundary at the end of the data for file %s", strlen(filename) > 0 ? filename : "");
1070 #endif
1071 cancel_upload = UPLOAD_ERROR_C;
1072 }
1073 #if DEBUG_FILE_UPLOAD
1074 if (strlen(filename) > 0 && total_bytes == 0 && !cancel_upload) {
1075 sapi_module.sapi_error(E_WARNING, "Uploaded file size 0 - file [%s=%s] not saved", param, filename);
1076 cancel_upload = 5;
1077 }
1078 #endif
1079 if (php_rfc1867_callback != NULL) {
1080 multipart_event_file_end event_file_end;
1081
1082 event_file_end.post_bytes_processed = SG(read_post_bytes);
1083 event_file_end.temp_filename = temp_filename;
1084 event_file_end.cancel_upload = cancel_upload;
1085 if (php_rfc1867_callback(MULTIPART_EVENT_FILE_END, &event_file_end, &event_extra_data TSRMLS_CC) == FAILURE) {
1086 cancel_upload = UPLOAD_ERROR_X;
1087 }
1088 }
1089
1090 if (cancel_upload) {
1091 if (temp_filename) {
1092 if (cancel_upload != UPLOAD_ERROR_E) { /* file creation failed */
1093 unlink(temp_filename);
1094 }
1095 efree(temp_filename);
1096 }
1097 temp_filename = "";
1098 } else {
1099 zend_hash_add(SG(rfc1867_uploaded_files), temp_filename, strlen(temp_filename) + 1, &temp_filename, sizeof(char *), NULL);
1100 }
1101
1102 /* is_arr_upload is true when name of file upload field
1103 * ends in [.*]
1104 * start_arr is set to point to 1st [ */
1105 is_arr_upload = (start_arr = strchr(param,'[')) && (param[strlen(param)-1] == ']');
1106
1107 if (is_arr_upload) {
1108 array_len = strlen(start_arr);
1109 if (array_index) {
1110 efree(array_index);
1111 }
1112 array_index = estrndup(start_arr + 1, array_len - 2);
1113 }
1114
1115 /* Add $foo_name */
1116 if (llen < strlen(param) + MAX_SIZE_OF_INDEX + 1) {
1117 llen = strlen(param);
1118 lbuf = (char *) safe_erealloc(lbuf, llen, 1, MAX_SIZE_OF_INDEX + 1);
1119 llen += MAX_SIZE_OF_INDEX + 1;
1120 }
1121
1122 if (is_arr_upload) {
1123 if (abuf) efree(abuf);
1124 abuf = estrndup(param, strlen(param)-array_len);
1125 snprintf(lbuf, llen, "%s_name[%s]", abuf, array_index);
1126 } else {
1127 snprintf(lbuf, llen, "%s_name", param);
1128 }
1129
1130 /* The \ check should technically be needed for win32 systems only where
1131 * it is a valid path separator. However, IE in all it's wisdom always sends
1132 * the full path of the file on the user's filesystem, which means that unless
1133 * the user does basename() they get a bogus file name. Until IE's user base drops
1134 * to nill or problem is fixed this code must remain enabled for all systems. */
1135 s = _basename(internal_encoding, filename TSRMLS_CC);
1136 if (!s) {
1137 s = filename;
1138 }
1139
1140 if (!is_anonymous) {
1141 safe_php_register_variable(lbuf, s, strlen(s), NULL, 0 TSRMLS_CC);
1142 }
1143
1144 /* Add $foo[name] */
1145 if (is_arr_upload) {
1146 snprintf(lbuf, llen, "%s[name][%s]", abuf, array_index);
1147 } else {
1148 snprintf(lbuf, llen, "%s[name]", param);
1149 }
1150 register_http_post_files_variable(lbuf, s, http_post_files, 0 TSRMLS_CC);
1151 efree(filename);
1152 s = NULL;
1153
1154 /* Possible Content-Type: */
1155 if (cancel_upload || !(cd = php_mime_get_hdr_value(header, "Content-Type"))) {
1156 cd = "";
1157 } else {
1158 /* fix for Opera 6.01 */
1159 s = strchr(cd, ';');
1160 if (s != NULL) {
1161 *s = '\0';
1162 }
1163 }
1164
1165 /* Add $foo_type */
1166 if (is_arr_upload) {
1167 snprintf(lbuf, llen, "%s_type[%s]", abuf, array_index);
1168 } else {
1169 snprintf(lbuf, llen, "%s_type", param);
1170 }
1171 if (!is_anonymous) {
1172 safe_php_register_variable(lbuf, cd, strlen(cd), NULL, 0 TSRMLS_CC);
1173 }
1174
1175 /* Add $foo[type] */
1176 if (is_arr_upload) {
1177 snprintf(lbuf, llen, "%s[type][%s]", abuf, array_index);
1178 } else {
1179 snprintf(lbuf, llen, "%s[type]", param);
1180 }
1181 register_http_post_files_variable(lbuf, cd, http_post_files, 0 TSRMLS_CC);
1182
1183 /* Restore Content-Type Header */
1184 if (s != NULL) {
1185 *s = ';';
1186 }
1187 s = "";
1188
1189 {
1190 /* store temp_filename as-is (in case upload_tmp_dir
1191 * contains escapeable characters. escape only the variable name.) */
1192 zval zfilename;
1193
1194 /* Initialize variables */
1195 add_protected_variable(param TSRMLS_CC);
1196
1197 /* if param is of form xxx[.*] this will cut it to xxx */
1198 if (!is_anonymous) {
1199 ZVAL_STRING(&zfilename, temp_filename, 1);
1200 safe_php_register_variable_ex(param, &zfilename, NULL, 1 TSRMLS_CC);
1201 }
1202
1203 /* Add $foo[tmp_name] */
1204 if (is_arr_upload) {
1205 snprintf(lbuf, llen, "%s[tmp_name][%s]", abuf, array_index);
1206 } else {
1207 snprintf(lbuf, llen, "%s[tmp_name]", param);
1208 }
1209 add_protected_variable(lbuf TSRMLS_CC);
1210 ZVAL_STRING(&zfilename, temp_filename, 1);
1211 register_http_post_files_variable_ex(lbuf, &zfilename, http_post_files, 1 TSRMLS_CC);
1212 }
1213
1214 {
1215 zval file_size, error_type;
1216
1217 error_type.value.lval = cancel_upload;
1218 error_type.type = IS_LONG;
1219
1220 /* Add $foo[error] */
1221 if (cancel_upload) {
1222 file_size.value.lval = 0;
1223 file_size.type = IS_LONG;
1224 } else {
1225 file_size.value.lval = total_bytes;
1226 file_size.type = IS_LONG;
1227 }
1228
1229 if (is_arr_upload) {
1230 snprintf(lbuf, llen, "%s[error][%s]", abuf, array_index);
1231 } else {
1232 snprintf(lbuf, llen, "%s[error]", param);
1233 }
1234 register_http_post_files_variable_ex(lbuf, &error_type, http_post_files, 0 TSRMLS_CC);
1235
1236 /* Add $foo_size */
1237 if (is_arr_upload) {
1238 snprintf(lbuf, llen, "%s_size[%s]", abuf, array_index);
1239 } else {
1240 snprintf(lbuf, llen, "%s_size", param);
1241 }
1242 if (!is_anonymous) {
1243 safe_php_register_variable_ex(lbuf, &file_size, NULL, 0 TSRMLS_CC);
1244 }
1245
1246 /* Add $foo[size] */
1247 if (is_arr_upload) {
1248 snprintf(lbuf, llen, "%s[size][%s]", abuf, array_index);
1249 } else {
1250 snprintf(lbuf, llen, "%s[size]", param);
1251 }
1252 register_http_post_files_variable_ex(lbuf, &file_size, http_post_files, 0 TSRMLS_CC);
1253 }
1254 efree(param);
1255 }
1256 }
1257
1258 fileupload_done:
1259 if (php_rfc1867_callback != NULL) {
1260 multipart_event_end event_end;
1261
1262 event_end.post_bytes_processed = SG(read_post_bytes);
1263 php_rfc1867_callback(MULTIPART_EVENT_END, &event_end, &event_extra_data TSRMLS_CC);
1264 }
1265
1266 if (lbuf) efree(lbuf);
1267 if (abuf) efree(abuf);
1268 if (array_index) efree(array_index);
1269 zend_hash_destroy(&PG(rfc1867_protected_variables));
1270 zend_llist_destroy(&header);
1271 if (mbuff->boundary_next) efree(mbuff->boundary_next);
1272 if (mbuff->boundary) efree(mbuff->boundary);
1273 if (mbuff->buffer) efree(mbuff->buffer);
1274 if (mbuff) efree(mbuff);
1275 }
1276 /* }}} */
1277
1278 SAPI_API void php_rfc1867_set_multibyte_callbacks(
1279 php_rfc1867_encoding_translation_t encoding_translation,
1280 php_rfc1867_get_detect_order_t get_detect_order,
1281 php_rfc1867_set_input_encoding_t set_input_encoding,
1282 php_rfc1867_getword_t getword,
1283 php_rfc1867_getword_conf_t getword_conf,
1284 php_rfc1867_basename_t basename) /* {{{ */
1285 {
1286 php_rfc1867_encoding_translation = encoding_translation;
1287 php_rfc1867_get_detect_order = get_detect_order;
1288 php_rfc1867_set_input_encoding = set_input_encoding;
1289 php_rfc1867_getword = getword;
1290 php_rfc1867_getword_conf = getword_conf;
1291 php_rfc1867_basename = basename;
1292 }
1293 /* }}} */
1294
1295 /*
1296 * Local variables:
1297 * tab-width: 4
1298 * c-basic-offset: 4
1299 * End:
1300 * vim600: sw=4 ts=4 fdm=marker
1301 * vim<600: sw=4 ts=4
1302 */
1303
