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cfda15ffc1
php-src/main/rfc1867.c
Ilia Alshanetsky cfda15ffc1 Binary safe multipart request handling
2006-07-27 17:04:15 +00:00

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2006 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <rasmus@php.net> |
| Jani Taskinen <sniper@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
/*
* This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/).
*
*/
#include <stdio.h>
#include "php.h"
#include "php_open_temporary_file.h"
#include "zend_globals.h"
#include "php_globals.h"
#include "php_variables.h"
#include "rfc1867.h"
#define DEBUG_FILE_UPLOAD ZEND_DEBUG
PHPAPI int (*php_rfc1867_callback)(unsigned int event, void *event_data, void **extra TSRMLS_DC) = NULL;
#if HAVE_MBSTRING && !defined(COMPILE_DL_MBSTRING)
#include "ext/mbstring/mbstring.h"
static void safe_php_register_variable(char *var, char *strval, int val_len, zval *track_vars_array, zend_bool override_protection TSRMLS_DC);
#define SAFE_RETURN { \
php_mb_flush_gpc_variables(num_vars, val_list, len_list, array_ptr TSRMLS_CC); \
if (lbuf) efree(lbuf); \
if (abuf) efree(abuf); \
if (array_index) efree(array_index); \
zend_hash_destroy(&PG(rfc1867_protected_variables)); \
zend_llist_destroy(&header); \
if (mbuff->boundary_next) efree(mbuff->boundary_next); \
if (mbuff->boundary) efree(mbuff->boundary); \
if (mbuff->buffer) efree(mbuff->buffer); \
if (mbuff) efree(mbuff); \
return; }
void php_mb_flush_gpc_variables(int num_vars, char **val_list, int *len_list, zval *array_ptr TSRMLS_DC)
{
int i;
if (php_mb_encoding_translation(TSRMLS_C)) {
if (num_vars > 0 &&
php_mb_gpc_encoding_detector(val_list, len_list, num_vars, NULL TSRMLS_CC) == SUCCESS) {
php_mb_gpc_encoding_converter(val_list, len_list, num_vars, NULL, NULL TSRMLS_CC);
}
for (i=0; i<num_vars; i+=2){
safe_php_register_variable(val_list[i], val_list[i+1], len_list[i+1], array_ptr, 0 TSRMLS_CC);
efree(val_list[i]);
efree(val_list[i+1]);
}
efree(val_list);
efree(len_list);
}
}
void php_mb_gpc_realloc_buffer(char ***pval_list, int **plen_list, int *num_vars_max, int inc TSRMLS_DC)
{
/* allow only even increments */
if (inc & 1) {
inc++;
}
(*num_vars_max) += inc;
*pval_list = (char **)erealloc(*pval_list, (*num_vars_max+2)*sizeof(char *));
*plen_list = (int *)erealloc(*plen_list, (*num_vars_max+2)*sizeof(int));
}
void php_mb_gpc_stack_variable(char *param, char *value, char ***pval_list, int **plen_list, int *num_vars, int *num_vars_max TSRMLS_DC)
{
char **val_list=*pval_list;
int *len_list=*plen_list;
if (*num_vars>=*num_vars_max){
php_mb_gpc_realloc_buffer(pval_list, plen_list, num_vars_max,
16 TSRMLS_CC);
/* in case realloc relocated the buffer */
val_list = *pval_list;
len_list = *plen_list;
}
val_list[*num_vars] = (char *)estrdup(param);
len_list[*num_vars] = strlen(param);
(*num_vars)++;
val_list[*num_vars] = (char *)estrdup(value);
len_list[*num_vars] = strlen(value);
(*num_vars)++;
}
#else
#define SAFE_RETURN { \
if (lbuf) efree(lbuf); \
if (abuf) efree(abuf); \
if (array_index) efree(array_index); \
zend_hash_destroy(&PG(rfc1867_protected_variables)); \
zend_llist_destroy(&header); \
if (mbuff->boundary_next) efree(mbuff->boundary_next); \
if (mbuff->boundary) efree(mbuff->boundary); \
if (mbuff->buffer) efree(mbuff->buffer); \
if (mbuff) efree(mbuff); \
return; }
#endif
/* The longest property name we use in an uploaded file array */
#define MAX_SIZE_OF_INDEX sizeof("[tmp_name]")
/* The longest anonymous name */
#define MAX_SIZE_ANONNAME 33
/* Errors */
#define UPLOAD_ERROR_OK 0 /* File upload succesful */
#define UPLOAD_ERROR_A 1 /* Uploaded file exceeded upload_max_filesize */
#define UPLOAD_ERROR_B 2 /* Uploaded file exceeded MAX_FILE_SIZE */
#define UPLOAD_ERROR_C 3 /* Partially uploaded */
#define UPLOAD_ERROR_D 4 /* No file uploaded */
#define UPLOAD_ERROR_E 6 /* Missing /tmp or similar directory */
#define UPLOAD_ERROR_F 7 /* Failed to write file to disk */
#define UPLOAD_ERROR_X 8 /* File upload stopped by extension */
void php_rfc1867_register_constants(TSRMLS_D)
{
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_OK", UPLOAD_ERROR_OK, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_INI_SIZE", UPLOAD_ERROR_A, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_FORM_SIZE", UPLOAD_ERROR_B, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_PARTIAL", UPLOAD_ERROR_C, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_NO_FILE", UPLOAD_ERROR_D, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_NO_TMP_DIR", UPLOAD_ERROR_E, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_CANT_WRITE", UPLOAD_ERROR_F, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_EXTENSION", UPLOAD_ERROR_X, CONST_CS | CONST_PERSISTENT);
}
static void normalize_protected_variable(char *varname TSRMLS_DC)
{
char *s=varname, *index=NULL, *indexend=NULL, *p;
/* overjump leading space */
while (*s == ' ') {
s++;
}
/* and remove it */
if (s != varname) {
memmove(varname, s, strlen(s)+1);
}
for (p=varname; *p && *p != '['; p++) {
switch(*p) {
case ' ':
case '.':
*p='_';
break;
}
}
/* find index */
index = strchr(varname, '[');
if (index) {
index++;
s=index;
} else {
return;
}
/* done? */
while (index) {
while (*index == ' ' || *index == '\r' || *index == '\n' || *index=='\t') {
index++;
}
indexend = strchr(index, ']');
indexend = indexend ? indexend + 1 : index + strlen(index);
if (s != index) {
memmove(s, index, strlen(index)+1);
s += indexend-index;
} else {
s = indexend;
}
if (*s == '[') {
s++;
index = s;
} else {
index = NULL;
}
}
*s++='\0';
}
static void add_protected_variable(char *varname TSRMLS_DC)
{
int dummy=1;
normalize_protected_variable(varname TSRMLS_CC);
zend_hash_add(&PG(rfc1867_protected_variables), varname, strlen(varname)+1, &dummy, sizeof(int), NULL);
}
static zend_bool is_protected_variable(char *varname TSRMLS_DC)
{
normalize_protected_variable(varname TSRMLS_CC);
return zend_hash_exists(&PG(rfc1867_protected_variables), varname, strlen(varname)+1);
}
static void safe_php_register_variable(char *var, char *strval, int val_len, zval *track_vars_array, zend_bool override_protection TSRMLS_DC)
{
if (override_protection || !is_protected_variable(var TSRMLS_CC)) {
php_register_variable_safe(var, strval, val_len, track_vars_array TSRMLS_CC);
}
}
static void safe_php_register_variable_ex(char *var, zval *val, zval *track_vars_array, zend_bool override_protection TSRMLS_DC)
{
if (override_protection || !is_protected_variable(var TSRMLS_CC)) {
php_register_variable_ex(var, val, track_vars_array TSRMLS_CC);
}
}
static void register_http_post_files_variable(char *strvar, char *val, zval *http_post_files, zend_bool override_protection TSRMLS_DC)
{
int register_globals = PG(register_globals);
PG(register_globals) = 0;
safe_php_register_variable(strvar, val, strlen(val), http_post_files, override_protection TSRMLS_CC);
PG(register_globals) = register_globals;
}
static void register_http_post_files_variable_ex(char *var, zval *val, zval *http_post_files, zend_bool override_protection TSRMLS_DC)
{
int register_globals = PG(register_globals);
PG(register_globals) = 0;
safe_php_register_variable_ex(var, val, http_post_files, override_protection TSRMLS_CC);
PG(register_globals) = register_globals;
}
static int unlink_filename(char **filename TSRMLS_DC)
{
VCWD_UNLINK(*filename);
return 0;
}
void destroy_uploaded_files_hash(TSRMLS_D)
{
zend_hash_apply(SG(rfc1867_uploaded_files), (apply_func_t) unlink_filename TSRMLS_CC);
zend_hash_destroy(SG(rfc1867_uploaded_files));
FREE_HASHTABLE(SG(rfc1867_uploaded_files));
}
/*
* Following code is based on apache_multipart_buffer.c from libapreq-0.33 package.
*
*/
#define FILLUNIT (1024 * 5)
typedef struct {
/* read buffer */
char *buffer;
char *buf_begin;
int bufsize;
int bytes_in_buffer;
/* boundary info */
char *boundary;
char *boundary_next;
int boundary_next_len;
} multipart_buffer;
typedef struct {
char *key;
char *value;
} mime_header_entry;
/*
fill up the buffer with client data.
returns number of bytes added to buffer.
*/
static int fill_buffer(multipart_buffer *self TSRMLS_DC)
{
int bytes_to_read, total_read = 0, actual_read = 0;
/* shift the existing data if necessary */
if (self->bytes_in_buffer > 0 && self->buf_begin != self->buffer) {
memmove(self->buffer, self->buf_begin, self->bytes_in_buffer);
}
self->buf_begin = self->buffer;
/* calculate the free space in the buffer */
bytes_to_read = self->bufsize - self->bytes_in_buffer;
/* read the required number of bytes */
while (bytes_to_read > 0) {
char *buf = self->buffer + self->bytes_in_buffer;
actual_read = sapi_module.read_post(buf, bytes_to_read TSRMLS_CC);
/* update the buffer length */
if (actual_read > 0) {
self->bytes_in_buffer += actual_read;
SG(read_post_bytes) += actual_read;
total_read += actual_read;
bytes_to_read -= actual_read;
} else {
break;
}
}
return total_read;
}
/* eof if we are out of bytes, or if we hit the final boundary */
static int multipart_buffer_eof(multipart_buffer *self TSRMLS_DC)
{
if ( (self->bytes_in_buffer == 0 && fill_buffer(self TSRMLS_CC) < 1) ) {
return 1;
} else {
return 0;
}
}
/* create new multipart_buffer structure */
static multipart_buffer *multipart_buffer_new(char *boundary, int boundary_len)
{
multipart_buffer *self = (multipart_buffer *) ecalloc(1, sizeof(multipart_buffer));
int minsize = boundary_len + 6;
if (minsize < FILLUNIT) minsize = FILLUNIT;
self->buffer = (char *) ecalloc(1, minsize + 1);
self->bufsize = minsize;
self->boundary = (char *) ecalloc(1, boundary_len + 3);
sprintf(self->boundary, "--%s", boundary);
self->boundary_next = (char *) ecalloc(1, boundary_len + 4);
sprintf(self->boundary_next, "\n--%s", boundary);
self->boundary_next_len = boundary_len + 3;
self->buf_begin = self->buffer;
self->bytes_in_buffer = 0;
return self;
}
/*
gets the next CRLF terminated line from the input buffer.
if it doesn't find a CRLF, and the buffer isn't completely full, returns
NULL; otherwise, returns the beginning of the null-terminated line,
minus the CRLF.
note that we really just look for LF terminated lines. this works
around a bug in internet explorer for the macintosh which sends mime
boundaries that are only LF terminated when you use an image submit
button in a multipart/form-data form.
*/
static char *next_line(multipart_buffer *self)
{
/* look for LF in the data */
char* line = self->buf_begin;
char* ptr = memchr(self->buf_begin, '\n', self->bytes_in_buffer);
if (ptr) { /* LF found */
/* terminate the string, remove CRLF */
if ((ptr - line) > 0 && *(ptr-1) == '\r') {
*(ptr-1) = 0;
} else {
*ptr = 0;
}
/* bump the pointer */
self->buf_begin = ptr + 1;
self->bytes_in_buffer -= (self->buf_begin - line);
} else { /* no LF found */
/* buffer isn't completely full, fail */
if (self->bytes_in_buffer < self->bufsize) {
return NULL;
}
/* return entire buffer as a partial line */
line[self->bufsize] = 0;
self->buf_begin = ptr;
self->bytes_in_buffer = 0;
}
return line;
}
/* returns the next CRLF terminated line from the client */
static char *get_line(multipart_buffer *self TSRMLS_DC)
{
char* ptr = next_line(self);
if (!ptr) {
fill_buffer(self TSRMLS_CC);
ptr = next_line(self);
}
return ptr;
}
/* Free header entry */
static void php_free_hdr_entry(mime_header_entry *h)
{
if (h->key) {
efree(h->key);
}
if (h->value) {
efree(h->value);
}
}
/* finds a boundary */
static int find_boundary(multipart_buffer *self, char *boundary TSRMLS_DC)
{
char *line;
/* loop thru lines */
while( (line = get_line(self TSRMLS_CC)) )
{
/* finished if we found the boundary */
if (!strcmp(line, boundary)) {
return 1;
}
}
/* didn't find the boundary */
return 0;
}
/* parse headers */
static int multipart_buffer_headers(multipart_buffer *self, zend_llist *header TSRMLS_DC)
{
char *line;
mime_header_entry prev_entry, entry;
int prev_len, cur_len;
/* didn't find boundary, abort */
if (!find_boundary(self, self->boundary TSRMLS_CC)) {
return 0;
}
/* get lines of text, or CRLF_CRLF */
while( (line = get_line(self TSRMLS_CC)) && strlen(line) > 0 )
{
/* add header to table */
char *key = line;
char *value = NULL;
/* space in the beginning means same header */
if (!isspace(line[0])) {
value = strchr(line, ':');
}
if (value) {
*value = 0;
do { value++; } while(isspace(*value));
entry.value = estrdup(value);
entry.key = estrdup(key);
} else if (zend_llist_count(header)) { /* If no ':' on the line, add to previous line */
prev_len = strlen(prev_entry.value);
cur_len = strlen(line);
entry.value = emalloc(prev_len + cur_len + 1);
memcpy(entry.value, prev_entry.value, prev_len);
memcpy(entry.value + prev_len, line, cur_len);
entry.value[cur_len + prev_len] = '\0';
entry.key = estrdup(prev_entry.key);
zend_llist_remove_tail(header);
} else {
continue;
}
zend_llist_add_element(header, &entry);
prev_entry = entry;
}
return 1;
}
static char *php_mime_get_hdr_value(zend_llist header, char *key)
{
mime_header_entry *entry;
if (key == NULL) {
return NULL;
}
entry = zend_llist_get_first(&header);
while (entry) {
if (!strcasecmp(entry->key, key)) {
return entry->value;
}
entry = zend_llist_get_next(&header);
}
return NULL;
}
static char *php_ap_getword(char **line, char stop)
{
char *pos = *line, quote;
char *res;
while (*pos && *pos != stop) {
if ((quote = *pos) == '"' || quote == '\'') {
++pos;
while (*pos && *pos != quote) {
if (*pos == '\\' && pos[1] && pos[1] == quote) {
pos += 2;
} else {
++pos;
}
}
if (*pos) {
++pos;
}
} else ++pos;
}
if (*pos == '\0') {
res = estrdup(*line);
*line += strlen(*line);
return res;
}
res = estrndup(*line, pos - *line);
while (*pos == stop) {
++pos;
}
*line = pos;
return res;
}
static char *substring_conf(char *start, int len, char quote TSRMLS_DC)
{
char *result = emalloc(len + 2);
char *resp = result;
int i;
for (i = 0; i < len; ++i) {
if (start[i] == '\\' && (start[i + 1] == '\\' || (quote && start[i + 1] == quote))) {
*resp++ = start[++i];
} else {
#if HAVE_MBSTRING && !defined(COMPILE_DL_MBSTRING)
if (php_mb_encoding_translation(TSRMLS_C)) {
size_t j = php_mb_gpc_mbchar_bytes(start+i TSRMLS_CC);
while (j-- > 0 && i < len) {
*resp++ = start[i++];
}
--i;
} else {
*resp++ = start[i];
}
#else
*resp++ = start[i];
#endif
}
}
*resp++ = '\0';
return result;
}
static char *php_ap_getword_conf(char **line TSRMLS_DC)
{
char *str = *line, *strend, *res, quote;
#if HAVE_MBSTRING && !defined(COMPILE_DL_MBSTRING)
if (php_mb_encoding_translation(TSRMLS_C)) {
int len=strlen(str);
php_mb_gpc_encoding_detector(&str, &len, 1, NULL TSRMLS_CC);
}
#endif
while (*str && isspace(*str)) {
++str;
}
if (!*str) {
*line = str;
return estrdup("");
}
if ((quote = *str) == '"' || quote == '\'') {
strend = str + 1;
look_for_quote:
while (*strend && *strend != quote) {
if (*strend == '\\' && strend[1] && strend[1] == quote) {
strend += 2;
} else {
++strend;
}
}
if (*strend && *strend == quote) {
char p = *(strend + 1);
if (p != '\r' && p != '\n' && p != '\0') {
strend++;
goto look_for_quote;
}
}
res = substring_conf(str + 1, strend - str - 1, quote TSRMLS_CC);
if (*strend == quote) {
++strend;
}
} else {
strend = str;
while (*strend && !isspace(*strend)) {
++strend;
}
res = substring_conf(str, strend - str, 0 TSRMLS_CC);
}
while (*strend && isspace(*strend)) {
++strend;
}
*line = strend;
return res;
}
/*
search for a string in a fixed-length byte string.
if partial is true, partial matches are allowed at the end of the buffer.
returns NULL if not found, or a pointer to the start of the first match.
*/
static void *php_ap_memstr(char *haystack, int haystacklen, char *needle, int needlen, int partial)
{
int len = haystacklen;
char *ptr = haystack;
/* iterate through first character matches */
while( (ptr = memchr(ptr, needle[0], len)) ) {
/* calculate length after match */
len = haystacklen - (ptr - (char *)haystack);
/* done if matches up to capacity of buffer */
if (memcmp(needle, ptr, needlen < len ? needlen : len) == 0 && (partial || len >= needlen)) {
break;
}
/* next character */
ptr++; len--;
}
return ptr;
}
/* read until a boundary condition */
static int multipart_buffer_read(multipart_buffer *self, char *buf, int bytes, int *end TSRMLS_DC)
{
int len, max;
char *bound;
/* fill buffer if needed */
if (bytes > self->bytes_in_buffer) {
fill_buffer(self TSRMLS_CC);
}
/* look for a potential boundary match, only read data up to that point */
if ((bound = php_ap_memstr(self->buf_begin, self->bytes_in_buffer, self->boundary_next, self->boundary_next_len, 1))) {
max = bound - self->buf_begin;
if (end && php_ap_memstr(self->buf_begin, self->bytes_in_buffer, self->boundary_next, self->boundary_next_len, 0)) {
*end = 1;
}
} else {
max = self->bytes_in_buffer;
}
/* maximum number of bytes we are reading */
len = max < bytes-1 ? max : bytes-1;
/* if we read any data... */
if (len > 0) {
/* copy the data */
memcpy(buf, self->buf_begin, len);
buf[len] = 0;
if (bound && len > 0 && buf[len-1] == '\r') {
buf[--len] = 0;
}
/* update the buffer */
self->bytes_in_buffer -= len;
self->buf_begin += len;
}
return len;
}
/*
XXX: this is horrible memory-usage-wise, but we only expect
to do this on small pieces of form data.
*/
static char *multipart_buffer_read_body(multipart_buffer *self, unsigned int *len TSRMLS_DC)
{
char buf[FILLUNIT], *out=NULL;
int total_bytes=0, read_bytes=0;
while((read_bytes = multipart_buffer_read(self, buf, sizeof(buf), NULL TSRMLS_CC))) {
out = erealloc(out, total_bytes + read_bytes + 1);
memcpy(out + total_bytes, buf, read_bytes);
total_bytes += read_bytes;
}
if (out) out[total_bytes] = '\0';
*len = total_bytes;
return out;
}
/*
* The combined READER/HANDLER
*
*/
SAPI_API SAPI_POST_HANDLER_FUNC(rfc1867_post_handler)
{
char *boundary, *s=NULL, *boundary_end = NULL, *start_arr=NULL, *array_index=NULL;
char *temp_filename=NULL, *lbuf=NULL, *abuf=NULL;
int boundary_len=0, total_bytes=0, cancel_upload=0, is_arr_upload=0, array_len=0;
int max_file_size=0, skip_upload=0, anonindex=0, is_anonymous;
zval *http_post_files=NULL; HashTable *uploaded_files=NULL;
#if HAVE_MBSTRING && !defined(COMPILE_DL_MBSTRING)
int str_len = 0, num_vars = 0, num_vars_max = 2*10, *len_list = NULL;
char **val_list = NULL;
#endif
zend_bool magic_quotes_gpc;
multipart_buffer *mbuff;
zval *array_ptr = (zval *) arg;
int fd=-1;
zend_llist header;
void *event_extra_data = NULL;
if (SG(request_info).content_length > SG(post_max_size)) {
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));
return;
}
/* Get the boundary */
boundary = strstr(content_type_dup, "boundary");
if (!boundary || !(boundary=strchr(boundary, '='))) {
sapi_module.sapi_error(E_WARNING, "Missing boundary in multipart/form-data POST data");
return;
}
boundary++;
boundary_len = strlen(boundary);
if (boundary[0] == '"') {
boundary++;
boundary_end = strchr(boundary, '"');
if (!boundary_end) {
sapi_module.sapi_error(E_WARNING, "Invalid boundary in multipart/form-data POST data");
return;
}
} else {
/* search for the end of the boundary */
boundary_end = strchr(boundary, ',');
}
if (boundary_end) {
boundary_end[0] = '\0';
boundary_len = boundary_end-boundary;
}
/* Initialize the buffer */
if (!(mbuff = multipart_buffer_new(boundary, boundary_len))) {
sapi_module.sapi_error(E_WARNING, "Unable to initialize the input buffer");
return;
}
/* Initialize $_FILES[] */
zend_hash_init(&PG(rfc1867_protected_variables), 5, NULL, NULL, 0);
ALLOC_HASHTABLE(uploaded_files);
zend_hash_init(uploaded_files, 5, NULL, (dtor_func_t) free_estring, 0);
SG(rfc1867_uploaded_files) = uploaded_files;
ALLOC_ZVAL(http_post_files);
array_init(http_post_files);
INIT_PZVAL(http_post_files);
PG(http_globals)[TRACK_VARS_FILES] = http_post_files;
#if HAVE_MBSTRING && !defined(COMPILE_DL_MBSTRING)
if (php_mb_encoding_translation(TSRMLS_C)) {
val_list = (char **)ecalloc(num_vars_max+2, sizeof(char *));
len_list = (int *)ecalloc(num_vars_max+2, sizeof(int));
}
#endif
zend_llist_init(&header, sizeof(mime_header_entry), (llist_dtor_func_t) php_free_hdr_entry, 0);
if (php_rfc1867_callback != NULL) {
multipart_event_start event_start;
event_start.content_length = SG(request_info).content_length;
if (php_rfc1867_callback(MULTIPART_EVENT_START, &event_start, &event_extra_data TSRMLS_CC) == FAILURE) {
goto fileupload_done;
}
}
while (!multipart_buffer_eof(mbuff TSRMLS_CC))
{
char buff[FILLUNIT];
char *cd=NULL,*param=NULL,*filename=NULL, *tmp=NULL;
size_t blen=0, wlen=0;
off_t offset;
zend_llist_clean(&header);
if (!multipart_buffer_headers(mbuff, &header TSRMLS_CC)) {
goto fileupload_done;
}
if ((cd = php_mime_get_hdr_value(header, "Content-Disposition"))) {
char *pair=NULL;
int end=0;
while (isspace(*cd)) {
++cd;
}
while (*cd && (pair = php_ap_getword(&cd, ';')))
{
char *key=NULL, *word = pair;
while (isspace(*cd)) {
++cd;
}
if (strchr(pair, '=')) {
key = php_ap_getword(&pair, '=');
if (!strcasecmp(key, "name")) {
if (param) {
efree(param);
}
param = php_ap_getword_conf(&pair TSRMLS_CC);
} else if (!strcasecmp(key, "filename")) {
if (filename) {
efree(filename);
}
filename = php_ap_getword_conf(&pair TSRMLS_CC);
}
}
if (key) {
efree(key);
}
efree(word);
}
/* Normal form variable, safe to read all data into memory */
if (!filename && param) {
unsigned int value_len;
char *value = multipart_buffer_read_body(mbuff, &value_len TSRMLS_CC);
unsigned int new_val_len; /* Dummy variable */
if (!value) {
value = estrdup("");
}
if (sapi_module.input_filter(PARSE_POST, param, &value, value_len, &new_val_len TSRMLS_CC)) {
if (php_rfc1867_callback != NULL) {
multipart_event_formdata event_formdata;
size_t newlength = 0;
event_formdata.post_bytes_processed = SG(read_post_bytes);
event_formdata.name = param;
event_formdata.value = &value;
event_formdata.length = new_val_len;
event_formdata.newlength = &newlength;
if (php_rfc1867_callback(MULTIPART_EVENT_FORMDATA, &event_formdata, &event_extra_data TSRMLS_CC) == FAILURE) {
efree(param);
efree(value);
continue;
}
new_val_len = newlength;
}
#if HAVE_MBSTRING && !defined(COMPILE_DL_MBSTRING)
if (php_mb_encoding_translation(TSRMLS_C)) {
php_mb_gpc_stack_variable(param, value, &val_list, &len_list,
&num_vars, &num_vars_max TSRMLS_CC);
} else {
safe_php_register_variable(param, value, new_val_len, array_ptr, 0 TSRMLS_CC);
}
#else
safe_php_register_variable(param, value, new_val_len, array_ptr, 0 TSRMLS_CC);
#endif
}
if (!strcasecmp(param, "MAX_FILE_SIZE")) {
max_file_size = atol(value);
}
efree(param);
efree(value);
continue;
}
/* If file_uploads=off, skip the file part */
if (!PG(file_uploads)) {
skip_upload = 1;
}
/* Return with an error if the posted data is garbled */
if (!param && !filename) {
sapi_module.sapi_error(E_WARNING, "File Upload Mime headers garbled");
goto fileupload_done;
}
if (!param) {
is_anonymous = 1;
param = emalloc(MAX_SIZE_ANONNAME);
snprintf(param, MAX_SIZE_ANONNAME, "%u", anonindex++);
} else {
is_anonymous = 0;
}
/* New Rule: never repair potential malicious user input */
if (!skip_upload) {
char *tmp = param;
long c = 0;
while (*tmp) {
if (*tmp == '[') {
c++;
} else if (*tmp == ']') {
c--;
if (tmp[1] && tmp[1] != '[') {
skip_upload = 1;
break;
}
}
if (c < 0) {
skip_upload = 1;
break;
}
tmp++;
}
}
total_bytes = cancel_upload = 0;
if (!skip_upload) {
/* Handle file */
fd = php_open_temporary_fd(PG(upload_tmp_dir), "php", &temp_filename TSRMLS_CC);
if (fd==-1) {
sapi_module.sapi_error(E_WARNING, "File upload error - unable to create a temporary file");
cancel_upload = UPLOAD_ERROR_E;
}
}
if (php_rfc1867_callback != NULL) {
multipart_event_file_start event_file_start;
event_file_start.post_bytes_processed = SG(read_post_bytes);
event_file_start.name = param;
event_file_start.filename = &filename;
if (php_rfc1867_callback(MULTIPART_EVENT_FILE_START, &event_file_start, &event_extra_data TSRMLS_CC) == FAILURE) {
skip_upload = 1;
}
}
if (skip_upload) {
efree(param);
efree(filename);
continue;
}
if(strlen(filename) == 0) {
#if DEBUG_FILE_UPLOAD
sapi_module.sapi_error(E_NOTICE, "No file uploaded");
#endif
cancel_upload = UPLOAD_ERROR_D;
}
offset = 0;
end = 0;
while (!cancel_upload && (blen = multipart_buffer_read(mbuff, buff, sizeof(buff), &end TSRMLS_CC)))
{
if (php_rfc1867_callback != NULL) {
multipart_event_file_data event_file_data;
event_file_data.post_bytes_processed = SG(read_post_bytes);
event_file_data.offset = offset;
event_file_data.data = buff;
event_file_data.length = blen;
event_file_data.newlength = &blen;
if (php_rfc1867_callback(MULTIPART_EVENT_FILE_DATA, &event_file_data, &event_extra_data TSRMLS_CC) == FAILURE) {
cancel_upload = UPLOAD_ERROR_X;
continue;
}
}
if (PG(upload_max_filesize) > 0 && total_bytes > PG(upload_max_filesize)) {
#if DEBUG_FILE_UPLOAD
sapi_module.sapi_error(E_NOTICE, "upload_max_filesize of %ld bytes exceeded - file [%s=%s] not saved", PG(upload_max_filesize), param, filename);
#endif
cancel_upload = UPLOAD_ERROR_A;
} else if (max_file_size && (total_bytes > max_file_size)) {
#if DEBUG_FILE_UPLOAD
sapi_module.sapi_error(E_NOTICE, "MAX_FILE_SIZE of %ld bytes exceeded - file [%s=%s] not saved", max_file_size, param, filename);
#endif
cancel_upload = UPLOAD_ERROR_B;
} else if (blen > 0) {
wlen = write(fd, buff, blen);
if (wlen < blen) {
#if DEBUG_FILE_UPLOAD
sapi_module.sapi_error(E_NOTICE, "Only %d bytes were written, expected to write %d", wlen, blen);
#endif
cancel_upload = UPLOAD_ERROR_F;
} else {
total_bytes += wlen;
}
offset += wlen;
}
}
if (fd!=-1) { /* may not be initialized if file could not be created */
close(fd);
}
if (!cancel_upload && !end) {
#if DEBUG_FILE_UPLOAD
sapi_module.sapi_error(E_NOTICE, "Missing mime boundary at the end of the data for file %s", strlen(filename) > 0 ? filename : "");
#endif
cancel_upload = UPLOAD_ERROR_C;
}
#if DEBUG_FILE_UPLOAD
if(strlen(filename) > 0 && total_bytes == 0 && !cancel_upload) {
sapi_module.sapi_error(E_WARNING, "Uploaded file size 0 - file [%s=%s] not saved", param, filename);
cancel_upload = 5;
}
#endif
if (php_rfc1867_callback != NULL) {
multipart_event_file_end event_file_end;
event_file_end.post_bytes_processed = SG(read_post_bytes);
event_file_end.temp_filename = temp_filename;
event_file_end.cancel_upload = cancel_upload;
if (php_rfc1867_callback(MULTIPART_EVENT_FILE_END, &event_file_end, &event_extra_data TSRMLS_CC) == FAILURE) {
cancel_upload = UPLOAD_ERROR_X;
}
}
if (cancel_upload) {
if (temp_filename) {
if (cancel_upload != UPLOAD_ERROR_E) { /* file creation failed */
unlink(temp_filename);
}
efree(temp_filename);
}
temp_filename="";
} else {
zend_hash_add(SG(rfc1867_uploaded_files), temp_filename, strlen(temp_filename) + 1, &temp_filename, sizeof(char *), NULL);
}
/* is_arr_upload is true when name of file upload field
* ends in [.*]
* start_arr is set to point to 1st [
*/
is_arr_upload = (start_arr = strchr(param,'[')) && (param[strlen(param)-1] == ']');
if (is_arr_upload) {
array_len = strlen(start_arr);
if (array_index) {
efree(array_index);
}
array_index = estrndup(start_arr+1, array_len-2);
}
/* Add $foo_name */
if (lbuf) {
efree(lbuf);
}
lbuf = (char *) emalloc(strlen(param) + MAX_SIZE_OF_INDEX + 1);
if (is_arr_upload) {
if (abuf) efree(abuf);
abuf = estrndup(param, strlen(param)-array_len);
sprintf(lbuf, "%s_name[%s]", abuf, array_index);
} else {
sprintf(lbuf, "%s_name", param);
}
#if HAVE_MBSTRING && !defined(COMPILE_DL_MBSTRING)
if (php_mb_encoding_translation(TSRMLS_C)) {
if (num_vars>=num_vars_max){
php_mb_gpc_realloc_buffer(&val_list, &len_list, &num_vars_max,
1 TSRMLS_CC);
}
val_list[num_vars] = filename;
len_list[num_vars] = strlen(filename);
num_vars++;
if(php_mb_gpc_encoding_detector(val_list, len_list, num_vars, NULL TSRMLS_CC) == SUCCESS) {
str_len = strlen(filename);
php_mb_gpc_encoding_converter(&filename, &str_len, 1, NULL, NULL TSRMLS_CC);
}
s = php_mb_strrchr(filename, '\\' TSRMLS_CC);
if ((tmp = php_mb_strrchr(filename, '/' TSRMLS_CC)) > s) {
s = tmp;
}
num_vars--;
goto filedone;
}
#endif
/* The \ check should technically be needed for win32 systems only where
* it is a valid path separator. However, IE in all it's wisdom always sends
* the full path of the file on the user's filesystem, which means that unless
* the user does basename() they get a bogus file name. Until IE's user base drops
* to nill or problem is fixed this code must remain enabled for all systems.
*/
s = strrchr(filename, '\\');
if ((tmp = strrchr(filename, '/')) > s) {
s = tmp;
}
#ifdef PHP_WIN32
if (PG(magic_quotes_gpc)) {
s = s ? s : filename;
tmp = strrchr(s, '\'');
s = tmp > s ? tmp : s;
tmp = strrchr(s, '"');
s = tmp > s ? tmp : s;
}
#endif
#if HAVE_MBSTRING && !defined(COMPILE_DL_MBSTRING)
filedone:
#endif
if (!is_anonymous) {
if (s && s > filename) {
safe_php_register_variable(lbuf, s+1, strlen(s+1), NULL, 0 TSRMLS_CC);
} else {
safe_php_register_variable(lbuf, filename, strlen(filename), NULL, 0 TSRMLS_CC);
}
}
/* Add $foo[name] */
if (is_arr_upload) {
sprintf(lbuf, "%s[name][%s]", abuf, array_index);
} else {
sprintf(lbuf, "%s[name]", param);
}
if (s && s > filename) {
register_http_post_files_variable(lbuf, s+1, http_post_files, 0 TSRMLS_CC);
} else {
register_http_post_files_variable(lbuf, filename, http_post_files, 0 TSRMLS_CC);
}
efree(filename);
s = NULL;
/* Possible Content-Type: */
if (cancel_upload || !(cd = php_mime_get_hdr_value(header, "Content-Type"))) {
cd = "";
} else {
/* fix for Opera 6.01 */
s = strchr(cd, ';');
if (s != NULL) {
*s = '\0';
}
}
/* Add $foo_type */
if (is_arr_upload) {
sprintf(lbuf, "%s_type[%s]", abuf, array_index);
} else {
sprintf(lbuf, "%s_type", param);
}
if (!is_anonymous) {
safe_php_register_variable(lbuf, cd, strlen(cd), NULL, 0 TSRMLS_CC);
}
/* Add $foo[type] */
if (is_arr_upload) {
sprintf(lbuf, "%s[type][%s]", abuf, array_index);
} else {
sprintf(lbuf, "%s[type]", param);
}
register_http_post_files_variable(lbuf, cd, http_post_files, 0 TSRMLS_CC);
/* Restore Content-Type Header */
if (s != NULL) {
*s = ';';
}
s = "";
/* Initialize variables */
add_protected_variable(param TSRMLS_CC);
magic_quotes_gpc = PG(magic_quotes_gpc);
PG(magic_quotes_gpc) = 0;
/* if param is of form xxx[.*] this will cut it to xxx */
if (!is_anonymous) {
safe_php_register_variable(param, temp_filename, strlen(temp_filename), NULL, 1 TSRMLS_CC);
}
/* Add $foo[tmp_name] */
if (is_arr_upload) {
sprintf(lbuf, "%s[tmp_name][%s]", abuf, array_index);
} else {
sprintf(lbuf, "%s[tmp_name]", param);
}
add_protected_variable(lbuf TSRMLS_CC);
register_http_post_files_variable(lbuf, temp_filename, http_post_files, 1 TSRMLS_CC);
PG(magic_quotes_gpc) = magic_quotes_gpc;
{
zval file_size, error_type;
error_type.value.lval = cancel_upload;
error_type.type = IS_LONG;
/* Add $foo[error] */
if (cancel_upload) {
file_size.value.lval = 0;
file_size.type = IS_LONG;
} else {
file_size.value.lval = total_bytes;
file_size.type = IS_LONG;
}
if (is_arr_upload) {
sprintf(lbuf, "%s[error][%s]", abuf, array_index);
} else {
sprintf(lbuf, "%s[error]", param);
}
register_http_post_files_variable_ex(lbuf, &error_type, http_post_files, 0 TSRMLS_CC);
/* Add $foo_size */
if (is_arr_upload) {
sprintf(lbuf, "%s_size[%s]", abuf, array_index);
} else {
sprintf(lbuf, "%s_size", param);
}
if (!is_anonymous) {
safe_php_register_variable_ex(lbuf, &file_size, NULL, 0 TSRMLS_CC);
}
/* Add $foo[size] */
if (is_arr_upload) {
sprintf(lbuf, "%s[size][%s]", abuf, array_index);
} else {
sprintf(lbuf, "%s[size]", param);
}
register_http_post_files_variable_ex(lbuf, &file_size, http_post_files, 0 TSRMLS_CC);
}
efree(param);
}
}
fileupload_done:
if (php_rfc1867_callback != NULL) {
multipart_event_end event_end;
event_end.post_bytes_processed = SG(read_post_bytes);
php_rfc1867_callback(MULTIPART_EVENT_END, &event_end, &event_extra_data TSRMLS_CC);
}
SAFE_RETURN;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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