mirror of
https://github.com/php/php-src.git
synced 2024-09-22 18:37:25 +00:00
631 lines
14 KiB
C++
631 lines
14 KiB
C++
/*
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+----------------------------------------------------------------------+
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| PHP Version 5 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2004 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.0 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_0.txt. |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Sascha Schumann <sascha@schumann.cx> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "php.h"
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#include "ext/standard/php_var.h"
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#include "php_incomplete_class.h"
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/* {{{ reference-handling for unserializer: var_* */
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#define VAR_ENTRIES_MAX 1024
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typedef struct {
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zval *data[VAR_ENTRIES_MAX];
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long used_slots;
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void *next;
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} var_entries;
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static inline void var_push(php_unserialize_data_t *var_hashx, zval **rval)
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{
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var_entries *var_hash = var_hashx->first, *prev = NULL;
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while (var_hash && var_hash->used_slots == VAR_ENTRIES_MAX) {
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prev = var_hash;
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var_hash = var_hash->next;
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}
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if (!var_hash) {
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var_hash = emalloc(sizeof(var_entries));
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var_hash->used_slots = 0;
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var_hash->next = 0;
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if (!var_hashx->first)
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var_hashx->first = var_hash;
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else
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prev->next = var_hash;
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}
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var_hash->data[var_hash->used_slots++] = *rval;
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}
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static inline void var_push_dtor(php_unserialize_data_t *var_hashx, zval **rval)
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{
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var_entries *var_hash = var_hashx->first_dtor, *prev = NULL;
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while (var_hash && var_hash->used_slots == VAR_ENTRIES_MAX) {
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prev = var_hash;
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var_hash = var_hash->next;
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}
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if (!var_hash) {
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var_hash = emalloc(sizeof(var_entries));
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var_hash->used_slots = 0;
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var_hash->next = 0;
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if (!var_hashx->first_dtor)
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var_hashx->first_dtor = var_hash;
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else
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prev->next = var_hash;
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}
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(*rval)->refcount++;
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var_hash->data[var_hash->used_slots++] = *rval;
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}
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PHPAPI void var_replace(php_unserialize_data_t *var_hashx, zval *ozval, zval **nzval)
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{
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long i;
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var_entries *var_hash = var_hashx->first;
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while (var_hash) {
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for (i = 0; i < var_hash->used_slots; i++) {
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if (var_hash->data[i] == ozval) {
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var_hash->data[i] = *nzval;
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/* do not break here */
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}
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}
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var_hash = var_hash->next;
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}
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}
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static int var_access(php_unserialize_data_t *var_hashx, long id, zval ***store)
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{
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var_entries *var_hash = var_hashx->first;
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while (id >= VAR_ENTRIES_MAX && var_hash && var_hash->used_slots == VAR_ENTRIES_MAX) {
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var_hash = var_hash->next;
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id -= VAR_ENTRIES_MAX;
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}
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if (!var_hash) return !SUCCESS;
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if (id < 0 || id >= var_hash->used_slots) return !SUCCESS;
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*store = &var_hash->data[id];
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return SUCCESS;
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}
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PHPAPI void var_destroy(php_unserialize_data_t *var_hashx)
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{
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void *next;
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long i;
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var_entries *var_hash = var_hashx->first;
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while (var_hash) {
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next = var_hash->next;
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efree(var_hash);
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var_hash = next;
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}
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var_hash = var_hashx->first_dtor;
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while (var_hash) {
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for (i = 0; i < var_hash->used_slots; i++) {
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zval_ptr_dtor(&var_hash->data[i]);
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}
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next = var_hash->next;
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efree(var_hash);
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var_hash = next;
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}
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}
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/* }}} */
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#define YYFILL(n) do { } while (0)
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#define YYCTYPE unsigned char
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#define YYCURSOR cursor
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#define YYLIMIT limit
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#define YYMARKER marker
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/*!re2c
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uiv = [+]? [0-9]+;
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iv = [+-]? [0-9]+;
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nv = [+-]? ([0-9]* "." [0-9]+|[0-9]+ "." [0-9]*);
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nvexp = (iv | nv) [eE] [+-]? iv;
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any = [\000-\277];
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object = [OC];
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*/
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static inline long parse_iv2(const unsigned char *p, const unsigned char **q)
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{
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char cursor;
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long result = 0;
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int neg = 0;
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switch (*p) {
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case '-':
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neg++;
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/* fall-through */
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case '+':
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p++;
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}
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while (1) {
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cursor = (char)*p;
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if (cursor >= '0' && cursor <= '9') {
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result = result * 10 + cursor - '0';
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} else {
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break;
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}
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p++;
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}
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if (q) *q = p;
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if (neg) return -result;
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return result;
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}
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static inline long parse_iv(const unsigned char *p)
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{
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return parse_iv2(p, NULL);
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}
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/* no need to check for length - re2c already did */
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static inline size_t parse_uiv(const unsigned char *p)
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{
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unsigned char cursor;
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size_t result = 0;
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if (*p == '+') {
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p++;
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}
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while (1) {
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cursor = *p;
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if (cursor >= '0' && cursor <= '9') {
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result = result * 10 + (size_t)(cursor - (unsigned char)'0');
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} else {
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break;
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}
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p++;
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}
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return result;
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}
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#define UNSERIALIZE_PARAMETER zval **rval, const unsigned char **p, const unsigned char *max, php_unserialize_data_t *var_hash TSRMLS_DC
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#define UNSERIALIZE_PASSTHRU rval, p, max, var_hash TSRMLS_CC
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static inline int process_nested_data(UNSERIALIZE_PARAMETER, HashTable *ht, long elements)
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{
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while (elements-- > 0) {
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zval *key, *data, **old_data;
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ALLOC_INIT_ZVAL(key);
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if (!php_var_unserialize(&key, p, max, NULL TSRMLS_CC)) {
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zval_dtor(key);
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FREE_ZVAL(key);
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return 0;
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}
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if (Z_TYPE_P(key) != IS_LONG && Z_TYPE_P(key) != IS_STRING) {
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zval_dtor(key);
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FREE_ZVAL(key);
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return 0;
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}
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ALLOC_INIT_ZVAL(data);
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if (!php_var_unserialize(&data, p, max, var_hash TSRMLS_CC)) {
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zval_dtor(key);
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FREE_ZVAL(key);
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zval_dtor(data);
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FREE_ZVAL(data);
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return 0;
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}
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switch (Z_TYPE_P(key)) {
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case IS_LONG:
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if (zend_hash_index_find(ht, Z_LVAL_P(key), (void **)&old_data)==SUCCESS) {
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var_push_dtor(var_hash, old_data);
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}
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zend_hash_index_update(ht, Z_LVAL_P(key), &data, sizeof(data), NULL);
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break;
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case IS_STRING:
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if (zend_hash_find(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, (void **)&old_data)==SUCCESS) {
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var_push_dtor(var_hash, old_data);
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}
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zend_hash_update(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, &data, sizeof(data), NULL);
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break;
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}
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zval_dtor(key);
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FREE_ZVAL(key);
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if (elements && *(*p-1) != ';' && *(*p-1) != '}') {
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(*p)--;
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return 0;
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}
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}
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return 1;
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}
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static inline int finish_nested_data(UNSERIALIZE_PARAMETER)
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{
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if (*((*p)++) == '}')
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return 1;
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#if SOMETHING_NEW_MIGHT_LEAD_TO_CRASH_ENABLE_IF_YOU_ARE_BRAVE
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zval_ptr_dtor(rval);
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#endif
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return 0;
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}
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static inline int object_custom(UNSERIALIZE_PARAMETER, zend_class_entry *ce)
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{
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long datalen;
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if(ce->unserialize == NULL) {
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zend_error(E_WARNING, "Class %s has no unserializer", ce->name);
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return 0;
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}
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datalen = parse_iv2((*p) + 2, p);
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(*p) += 2;
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if(datalen < 0 || (*p) + datalen >= max) {
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zend_error(E_WARNING, "Insufficient data for unserializing - %ld required, %d present", datalen, max - (*p));
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return 0;
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}
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if(ce->unserialize(rval, ce, (const unsigned char*)*p, datalen, (zend_unserialize_data *)var_hash TSRMLS_CC) != SUCCESS) {
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return 0;
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}
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(*p) += datalen;
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return finish_nested_data(UNSERIALIZE_PASSTHRU);
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}
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static inline long object_common1(UNSERIALIZE_PARAMETER, zend_class_entry *ce)
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{
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long elements;
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elements = parse_iv2((*p) + 2, p);
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(*p) += 2;
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object_init_ex(*rval, ce);
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return elements;
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}
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static inline int object_common2(UNSERIALIZE_PARAMETER, long elements)
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{
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zval *retval_ptr = NULL;
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zval fname;
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if (!process_nested_data(UNSERIALIZE_PASSTHRU, Z_OBJPROP_PP(rval), elements)) {
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return 0;
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}
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if(Z_OBJCE_PP(rval) != PHP_IC_ENTRY) {
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INIT_PZVAL(&fname);
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ZVAL_STRINGL(&fname, "__wakeup", sizeof("__wakeup") - 1, 0);
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call_user_function_ex(CG(function_table), rval, &fname, &retval_ptr, 0, 0, 1, NULL TSRMLS_CC);
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}
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if (retval_ptr)
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zval_ptr_dtor(&retval_ptr);
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return finish_nested_data(UNSERIALIZE_PASSTHRU);
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}
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PHPAPI int php_var_unserialize(UNSERIALIZE_PARAMETER)
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{
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const unsigned char *cursor, *limit, *marker, *start;
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zval **rval_ref;
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limit = cursor = *p;
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if (var_hash && cursor[0] != 'R') {
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var_push(var_hash, rval);
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}
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start = cursor;
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/*!re2c
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"R:" iv ";" {
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long id;
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*p = YYCURSOR;
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if (!var_hash) return 0;
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id = parse_iv(start + 2) - 1;
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if (id == -1 || var_access(var_hash, id, &rval_ref) != SUCCESS) {
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return 0;
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}
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if (*rval != NULL) {
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zval_ptr_dtor(rval);
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}
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*rval = *rval_ref;
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(*rval)->refcount++;
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(*rval)->is_ref = 1;
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return 1;
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}
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"r:" iv ";" {
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long id;
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*p = YYCURSOR;
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if (!var_hash) return 0;
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id = parse_iv(start + 2) - 1;
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if (id == -1 || var_access(var_hash, id, &rval_ref) != SUCCESS) {
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return 0;
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}
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if (*rval == *rval_ref) return 0;
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if (*rval != NULL) {
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zval_ptr_dtor(rval);
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}
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*rval = *rval_ref;
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(*rval)->refcount++;
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(*rval)->is_ref = 0;
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return 1;
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}
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"N;" {
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*p = YYCURSOR;
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INIT_PZVAL(*rval);
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ZVAL_NULL(*rval);
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return 1;
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}
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"b:" [01] ";" {
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*p = YYCURSOR;
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INIT_PZVAL(*rval);
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ZVAL_BOOL(*rval, parse_iv(start + 2));
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return 1;
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}
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"i:" iv ";" {
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*p = YYCURSOR;
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INIT_PZVAL(*rval);
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ZVAL_LONG(*rval, parse_iv(start + 2));
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return 1;
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}
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"d:" ("NAN" | "-"? "INF") ";" {
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*p = YYCURSOR;
|
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INIT_PZVAL(*rval);
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if (!strncmp(start + 2, "NAN", 3)) {
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ZVAL_DOUBLE(*rval, php_get_nan());
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} else if (!strncmp(start + 2, "INF", 3)) {
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ZVAL_DOUBLE(*rval, php_get_inf());
|
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} else if (!strncmp(start + 2, "-INF", 4)) {
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ZVAL_DOUBLE(*rval, -php_get_inf());
|
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}
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|
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return 1;
|
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}
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|
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"d:" (iv | nv | nvexp) ";" {
|
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*p = YYCURSOR;
|
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INIT_PZVAL(*rval);
|
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ZVAL_DOUBLE(*rval, zend_strtod((const char *)start + 2, NULL));
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return 1;
|
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}
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"s:" uiv ":" ["] {
|
|
size_t len, maxlen;
|
|
char *str;
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|
|
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len = parse_uiv(start + 2);
|
|
maxlen = max - YYCURSOR;
|
|
if (maxlen < len) {
|
|
*p = start + 2;
|
|
return 0;
|
|
}
|
|
|
|
str = (char*)YYCURSOR;
|
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|
|
YYCURSOR += len;
|
|
|
|
if (*(YYCURSOR) != '"') {
|
|
*p = YYCURSOR;
|
|
return 0;
|
|
}
|
|
|
|
YYCURSOR += 2;
|
|
*p = YYCURSOR;
|
|
|
|
INIT_PZVAL(*rval);
|
|
ZVAL_STRINGL(*rval, str, len, 1);
|
|
return 1;
|
|
}
|
|
|
|
"a:" uiv ":" "{" {
|
|
long elements = parse_iv(start + 2);
|
|
/* use iv() not uiv() in order to check data range */
|
|
*p = YYCURSOR;
|
|
|
|
if (elements < 0) {
|
|
return 0;
|
|
}
|
|
|
|
INIT_PZVAL(*rval);
|
|
Z_TYPE_PP(rval) = IS_ARRAY;
|
|
ALLOC_HASHTABLE(Z_ARRVAL_PP(rval));
|
|
|
|
zend_hash_init(Z_ARRVAL_PP(rval), elements + 1, NULL, ZVAL_PTR_DTOR, 0);
|
|
|
|
if (!process_nested_data(UNSERIALIZE_PASSTHRU, Z_ARRVAL_PP(rval), elements)) {
|
|
return 0;
|
|
}
|
|
|
|
return finish_nested_data(UNSERIALIZE_PASSTHRU);
|
|
}
|
|
|
|
"o:" iv ":" ["] {
|
|
|
|
INIT_PZVAL(*rval);
|
|
|
|
return object_common2(UNSERIALIZE_PASSTHRU,
|
|
object_common1(UNSERIALIZE_PASSTHRU, ZEND_STANDARD_CLASS_DEF_PTR));
|
|
}
|
|
|
|
object ":" uiv ":" ["] {
|
|
size_t len, len2, len3, maxlen;
|
|
long elements;
|
|
char *class_name;
|
|
zend_class_entry *ce;
|
|
zend_class_entry **pce;
|
|
int incomplete_class = 0;
|
|
|
|
int custom_object = 0;
|
|
|
|
zval *user_func;
|
|
zval *retval_ptr;
|
|
zval **args[1];
|
|
zval *arg_func_name;
|
|
|
|
if(*start == 'C') {
|
|
custom_object = 1;
|
|
}
|
|
|
|
INIT_PZVAL(*rval);
|
|
len2 = len = parse_uiv(start + 2);
|
|
maxlen = max - YYCURSOR;
|
|
if (maxlen < len || len == 0) {
|
|
*p = start + 2;
|
|
return 0;
|
|
}
|
|
|
|
class_name = (char*)YYCURSOR;
|
|
|
|
YYCURSOR += len;
|
|
|
|
if (*(YYCURSOR) != '"') {
|
|
*p = YYCURSOR;
|
|
return 0;
|
|
}
|
|
if (*(YYCURSOR+1) != ':') {
|
|
*p = YYCURSOR+1;
|
|
return 0;
|
|
}
|
|
|
|
len3 = strspn(class_name, "0123456789_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377");
|
|
if (len3 != len)
|
|
{
|
|
*p = YYCURSOR + len3 - len;
|
|
return 0;
|
|
}
|
|
|
|
class_name = estrndup(class_name, len);
|
|
|
|
do {
|
|
/* Try to find class directly */
|
|
if (zend_lookup_class(class_name, len2, &pce TSRMLS_CC) == SUCCESS) {
|
|
ce = *pce;
|
|
break;
|
|
}
|
|
|
|
/* Check for unserialize callback */
|
|
if ((PG(unserialize_callback_func) == NULL) || (PG(unserialize_callback_func)[0] == '\0')) {
|
|
incomplete_class = 1;
|
|
ce = PHP_IC_ENTRY;
|
|
break;
|
|
}
|
|
|
|
/* Call unserialize callback */
|
|
MAKE_STD_ZVAL(user_func);
|
|
ZVAL_STRING(user_func, PG(unserialize_callback_func), 1);
|
|
args[0] = &arg_func_name;
|
|
MAKE_STD_ZVAL(arg_func_name);
|
|
ZVAL_STRING(arg_func_name, class_name, 1);
|
|
if (call_user_function_ex(CG(function_table), NULL, user_func, &retval_ptr, 1, args, 0, NULL TSRMLS_CC) != SUCCESS) {
|
|
php_error_docref(NULL TSRMLS_CC, E_WARNING, "defined (%s) but not found", user_func->value.str.val);
|
|
incomplete_class = 1;
|
|
ce = PHP_IC_ENTRY;
|
|
zval_ptr_dtor(&user_func);
|
|
zval_ptr_dtor(&arg_func_name);
|
|
break;
|
|
}
|
|
if (retval_ptr) {
|
|
zval_ptr_dtor(&retval_ptr);
|
|
}
|
|
|
|
/* The callback function may have defined the class */
|
|
if (zend_lookup_class(class_name, len2, &pce TSRMLS_CC) == SUCCESS) {
|
|
ce = *pce;
|
|
} else {
|
|
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Function %s() hasn't defined the class it was called for", user_func->value.str.val);
|
|
incomplete_class = 1;
|
|
ce = PHP_IC_ENTRY;
|
|
}
|
|
|
|
zval_ptr_dtor(&user_func);
|
|
zval_ptr_dtor(&arg_func_name);
|
|
break;
|
|
} while (1);
|
|
|
|
*p = YYCURSOR;
|
|
|
|
if(custom_object) {
|
|
efree(class_name);
|
|
return object_custom(UNSERIALIZE_PASSTHRU, ce);
|
|
}
|
|
|
|
elements = object_common1(UNSERIALIZE_PASSTHRU, ce);
|
|
|
|
if (incomplete_class) {
|
|
php_store_class_name(*rval, class_name, len2);
|
|
}
|
|
efree(class_name);
|
|
|
|
return object_common2(UNSERIALIZE_PASSTHRU, elements);
|
|
}
|
|
|
|
"}" {
|
|
/* this is the case where we have less data than planned */
|
|
php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Unexpected end of serialized data");
|
|
return 0; /* not sure if it should be 0 or 1 here? */
|
|
}
|
|
|
|
any { return 0; }
|
|
|
|
*/
|
|
|
|
return 0;
|
|
}
|