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7d7b7e801e
php-src/ext/standard/var_unserializer.re
Stanislav Malyshev 7d7b7e801e Merge branch 'PHP-7.2' 
* PHP-7.2:
  Fix #76300 - Dont attempt to change visibility of a parent private
2018-06-17 15:47:06 -07:00

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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2018 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. |
+----------------------------------------------------------------------+
| Author: Sascha Schumann <sascha@schumann.cx> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include "ext/standard/php_var.h"
#include "php_incomplete_class.h"
#include "zend_portability.h"
struct php_unserialize_data {
void *first;
void *last;
void *first_dtor;
void *last_dtor;
HashTable *allowed_classes;
};
PHPAPI php_unserialize_data_t php_var_unserialize_init() {
php_unserialize_data_t d;
/* fprintf(stderr, "UNSERIALIZE_INIT == lock: %u, level: %u\n", BG(serialize_lock), BG(unserialize).level); */
if (BG(serialize_lock) || !BG(unserialize).level) {
d = ecalloc(1, sizeof(struct php_unserialize_data));
if (!BG(serialize_lock)) {
BG(unserialize).data = d;
BG(unserialize).level = 1;
}
} else {
d = BG(unserialize).data;
++BG(unserialize).level;
}
return d;
}
PHPAPI void php_var_unserialize_destroy(php_unserialize_data_t d) {
/* fprintf(stderr, "UNSERIALIZE_DESTROY == lock: %u, level: %u\n", BG(serialize_lock), BG(unserialize).level); */
if (BG(serialize_lock) || BG(unserialize).level == 1) {
var_destroy(&d);
efree(d);
}
if (!BG(serialize_lock) && !--BG(unserialize).level) {
BG(unserialize).data = NULL;
}
}
PHPAPI HashTable *php_var_unserialize_get_allowed_classes(php_unserialize_data_t d) {
return d->allowed_classes;
}
PHPAPI void php_var_unserialize_set_allowed_classes(php_unserialize_data_t d, HashTable *classes) {
d->allowed_classes = classes;
}
/* {{{ reference-handling for unserializer: var_* */
#define VAR_ENTRIES_MAX 1024
#define VAR_ENTRIES_DBG 0
/* VAR_FLAG used in var_dtor entries to signify an entry on which __wakeup should be called */
#define VAR_WAKEUP_FLAG 1
typedef struct {
zval *data[VAR_ENTRIES_MAX];
zend_long used_slots;
void *next;
} var_entries;
typedef struct {
zval data[VAR_ENTRIES_MAX];
zend_long used_slots;
void *next;
} var_dtor_entries;
static inline void var_push(php_unserialize_data_t *var_hashx, zval *rval)
{
var_entries *var_hash = (*var_hashx)->last;
#if VAR_ENTRIES_DBG
fprintf(stderr, "var_push(%ld): %d\n", var_hash?var_hash->used_slots:-1L, Z_TYPE_P(rval));
#endif
if (!var_hash || var_hash->used_slots == VAR_ENTRIES_MAX) {
var_hash = emalloc(sizeof(var_entries));
var_hash->used_slots = 0;
var_hash->next = 0;
if (!(*var_hashx)->first) {
(*var_hashx)->first = var_hash;
} else {
((var_entries *) (*var_hashx)->last)->next = var_hash;
}
(*var_hashx)->last = var_hash;
}
var_hash->data[var_hash->used_slots++] = rval;
}
PHPAPI void var_push_dtor(php_unserialize_data_t *var_hashx, zval *rval)
{
zval *tmp_var = var_tmp_var(var_hashx);
if (!tmp_var) {
return;
}
ZVAL_COPY(tmp_var, rval);
}
PHPAPI zval *var_tmp_var(php_unserialize_data_t *var_hashx)
{
var_dtor_entries *var_hash;
if (!var_hashx || !*var_hashx) {
return NULL;
}
var_hash = (*var_hashx)->last_dtor;
if (!var_hash || var_hash->used_slots == VAR_ENTRIES_MAX) {
var_hash = emalloc(sizeof(var_dtor_entries));
var_hash->used_slots = 0;
var_hash->next = 0;
if (!(*var_hashx)->first_dtor) {
(*var_hashx)->first_dtor = var_hash;
} else {
((var_dtor_entries *) (*var_hashx)->last_dtor)->next = var_hash;
}
(*var_hashx)->last_dtor = var_hash;
}
ZVAL_UNDEF(&var_hash->data[var_hash->used_slots]);
Z_EXTRA(var_hash->data[var_hash->used_slots]) = 0;
return &var_hash->data[var_hash->used_slots++];
}
PHPAPI void var_replace(php_unserialize_data_t *var_hashx, zval *ozval, zval *nzval)
{
zend_long i;
var_entries *var_hash = (*var_hashx)->first;
#if VAR_ENTRIES_DBG
fprintf(stderr, "var_replace(%ld): %d\n", var_hash?var_hash->used_slots:-1L, Z_TYPE_P(nzval));
#endif
while (var_hash) {
for (i = 0; i < var_hash->used_slots; i++) {
if (var_hash->data[i] == ozval) {
var_hash->data[i] = nzval;
/* do not break here */
}
}
var_hash = var_hash->next;
}
}
static zval *var_access(php_unserialize_data_t *var_hashx, zend_long id)
{
var_entries *var_hash = (*var_hashx)->first;
#if VAR_ENTRIES_DBG
fprintf(stderr, "var_access(%ld): %ld\n", var_hash?var_hash->used_slots:-1L, id);
#endif
while (id >= VAR_ENTRIES_MAX && var_hash && var_hash->used_slots == VAR_ENTRIES_MAX) {
var_hash = var_hash->next;
id -= VAR_ENTRIES_MAX;
}
if (!var_hash) return NULL;
if (id < 0 || id >= var_hash->used_slots) return NULL;
return var_hash->data[id];
}
PHPAPI void var_destroy(php_unserialize_data_t *var_hashx)
{
void *next;
zend_long i;
var_entries *var_hash = (*var_hashx)->first;
var_dtor_entries *var_dtor_hash = (*var_hashx)->first_dtor;
zend_bool wakeup_failed = 0;
zval wakeup_name;
ZVAL_UNDEF(&wakeup_name);
#if VAR_ENTRIES_DBG
fprintf(stderr, "var_destroy(%ld)\n", var_hash?var_hash->used_slots:-1L);
#endif
while (var_hash) {
next = var_hash->next;
efree_size(var_hash, sizeof(var_entries));
var_hash = next;
}
while (var_dtor_hash) {
for (i = 0; i < var_dtor_hash->used_slots; i++) {
zval *zv = &var_dtor_hash->data[i];
#if VAR_ENTRIES_DBG
fprintf(stderr, "var_destroy dtor(%p, %ld)\n", var_dtor_hash->data[i], Z_REFCOUNT_P(var_dtor_hash->data[i]));
#endif
/* Perform delayed __wakeup calls */
if (Z_EXTRA_P(zv) == VAR_WAKEUP_FLAG) {
if (!wakeup_failed) {
zval retval;
if (Z_ISUNDEF(wakeup_name)) {
ZVAL_STRINGL(&wakeup_name, "__wakeup", sizeof("__wakeup") - 1);
}
BG(serialize_lock)++;
if (call_user_function(CG(function_table), zv, &wakeup_name, &retval, 0, 0) == FAILURE || Z_ISUNDEF(retval)) {
wakeup_failed = 1;
GC_ADD_FLAGS(Z_OBJ_P(zv), IS_OBJ_DESTRUCTOR_CALLED);
}
BG(serialize_lock)--;
zval_ptr_dtor(&retval);
} else {
GC_ADD_FLAGS(Z_OBJ_P(zv), IS_OBJ_DESTRUCTOR_CALLED);
}
}
i_zval_ptr_dtor(zv ZEND_FILE_LINE_CC);
}
next = var_dtor_hash->next;
efree_size(var_dtor_hash, sizeof(var_dtor_entries));
var_dtor_hash = next;
}
zval_ptr_dtor_nogc(&wakeup_name);
}
/* }}} */
static zend_string *unserialize_str(const unsigned char **p, size_t len, size_t maxlen)
{
size_t i, j;
zend_string *str = zend_string_safe_alloc(1, len, 0, 0);
unsigned char *end = *(unsigned char **)p+maxlen;
if (end < *p) {
zend_string_efree(str);
return NULL;
}
for (i = 0; i < len; i++) {
if (*p >= end) {
zend_string_efree(str);
return NULL;
}
if (**p != '\\') {
ZSTR_VAL(str)[i] = (char)**p;
} else {
unsigned char ch = 0;
for (j = 0; j < 2; j++) {
(*p)++;
if (**p >= '0' && **p <= '9') {
ch = (ch << 4) + (**p -'0');
} else if (**p >= 'a' && **p <= 'f') {
ch = (ch << 4) + (**p -'a'+10);
} else if (**p >= 'A' && **p <= 'F') {
ch = (ch << 4) + (**p -'A'+10);
} else {
zend_string_efree(str);
return NULL;
}
}
ZSTR_VAL(str)[i] = (char)ch;
}
(*p)++;
}
ZSTR_VAL(str)[i] = 0;
ZSTR_LEN(str) = i;
return str;
}
static inline int unserialize_allowed_class(
zend_string *class_name, php_unserialize_data_t *var_hashx)
{
HashTable *classes = (*var_hashx)->allowed_classes;
zend_string *lcname;
int res;
ALLOCA_FLAG(use_heap)
if(classes == NULL) {
return 1;
}
if(!zend_hash_num_elements(classes)) {
return 0;
}
ZSTR_ALLOCA_ALLOC(lcname, ZSTR_LEN(class_name), use_heap);
zend_str_tolower_copy(ZSTR_VAL(lcname), ZSTR_VAL(class_name), ZSTR_LEN(class_name));
res = zend_hash_exists(classes, lcname);
ZSTR_ALLOCA_FREE(lcname, use_heap);
return res;
}
#define YYFILL(n) do { } while (0)
#define YYCTYPE unsigned char
#define YYCURSOR cursor
#define YYLIMIT limit
#define YYMARKER marker
/*!re2c
uiv = [0-9]+;
iv = [+-]? [0-9]+;
nv = [+-]? ([0-9]* "." [0-9]+|[0-9]+ "." [0-9]*);
nvexp = (iv | nv) [eE] iv;
any = [\000-\377];
object = [OC];
*/
static inline zend_long parse_iv2(const unsigned char *p, const unsigned char **q)
{
zend_ulong result = 0;
zend_ulong neg = 0;
const unsigned char *start;
if (*p == '-') {
neg = 1;
p++;
} else if (UNEXPECTED(*p == '+')) {
p++;
}
while (UNEXPECTED(*p == '0')) {
p++;
}
start = p;
while (*p >= '0' && *p <= '9') {
result = result * 10 + ((zend_ulong)(*p) - '0');
p++;
}
if (q) {
*q = p;
}
/* number too long or overflow */
if (UNEXPECTED(p - start > MAX_LENGTH_OF_LONG - 1)
|| (SIZEOF_ZEND_LONG == 4
&& UNEXPECTED(p - start == MAX_LENGTH_OF_LONG - 1)
&& UNEXPECTED(*start > '2'))
|| UNEXPECTED(result - neg > ZEND_LONG_MAX)) {
php_error_docref(NULL, E_WARNING, "Numerical result out of range");
return (!neg) ? ZEND_LONG_MAX : ZEND_LONG_MIN;
}
return (!neg) ? (zend_long)result : -(zend_long)result;
}
static inline zend_long parse_iv(const unsigned char *p)
{
return parse_iv2(p, NULL);
}
/* no need to check for length - re2c already did */
static inline size_t parse_uiv(const unsigned char *p)
{
unsigned char cursor;
size_t result = 0;
while (1) {
cursor = *p;
if (cursor >= '0' && cursor <= '9') {
result = result * 10 + (size_t)(cursor - (unsigned char)'0');
} else {
break;
}
p++;
}
return result;
}
#define UNSERIALIZE_PARAMETER zval *rval, const unsigned char **p, const unsigned char *max, php_unserialize_data_t *var_hash
#define UNSERIALIZE_PASSTHRU rval, p, max, var_hash
static int php_var_unserialize_internal(UNSERIALIZE_PARAMETER, int as_key);
static zend_always_inline int process_nested_data(UNSERIALIZE_PARAMETER, HashTable *ht, zend_long elements, int objprops)
{
while (elements-- > 0) {
zval key, *data, d, *old_data;
zend_ulong idx;
ZVAL_UNDEF(&key);
if (!php_var_unserialize_internal(&key, p, max, NULL, 1)) {
zval_ptr_dtor(&key);
return 0;
}
data = NULL;
ZVAL_UNDEF(&d);
if (!objprops) {
if (Z_TYPE(key) == IS_LONG) {
idx = Z_LVAL(key);
numeric_key:
if (UNEXPECTED((old_data = zend_hash_index_find(ht, idx)) != NULL)) {
//??? update hash
var_push_dtor(var_hash, old_data);
data = zend_hash_index_update(ht, idx, &d);
} else {
data = zend_hash_index_add_new(ht, idx, &d);
}
} else if (Z_TYPE(key) == IS_STRING) {
if (UNEXPECTED(ZEND_HANDLE_NUMERIC(Z_STR(key), idx))) {
goto numeric_key;
}
if (UNEXPECTED((old_data = zend_hash_find(ht, Z_STR(key))) != NULL)) {
//??? update hash
var_push_dtor(var_hash, old_data);
data = zend_hash_update(ht, Z_STR(key), &d);
} else {
data = zend_hash_add_new(ht, Z_STR(key), &d);
}
} else {
zval_ptr_dtor(&key);
return 0;
}
} else {
if (EXPECTED(Z_TYPE(key) == IS_STRING)) {
string_key:
if (Z_TYPE_P(rval) == IS_OBJECT
&& zend_hash_num_elements(&Z_OBJCE_P(rval)->properties_info) > 0) {
zend_property_info *existing_propinfo;
zend_string *new_key;
const char *unmangled_class = NULL;
const char *unmangled_prop;
size_t unmangled_prop_len;
zend_string *unmangled;
if (UNEXPECTED(zend_unmangle_property_name_ex(Z_STR(key), &unmangled_class, &unmangled_prop, &unmangled_prop_len) == FAILURE)) {
zval_ptr_dtor(&key);
return 0;
}
unmangled = zend_string_init(unmangled_prop, unmangled_prop_len, 0);
existing_propinfo = zend_hash_find_ptr(&Z_OBJCE_P(rval)->properties_info, unmangled);
if ((unmangled_class == NULL || !strcmp(unmangled_class, "*") || !strcasecmp(unmangled_class, ZSTR_VAL(Z_OBJCE_P(rval)->name)))
&& (existing_propinfo != NULL)
&& (existing_propinfo->flags & ZEND_ACC_PPP_MASK)) {
if (existing_propinfo->flags & ZEND_ACC_PROTECTED) {
new_key = zend_mangle_property_name(
"*", 1, ZSTR_VAL(unmangled), ZSTR_LEN(unmangled), 0);
zend_string_release_ex(unmangled, 0);
} else if (existing_propinfo->flags & ZEND_ACC_PRIVATE) {
if (unmangled_class != NULL && strcmp(unmangled_class, "*") != 0) {
new_key = zend_mangle_property_name(
unmangled_class, strlen(unmangled_class),
ZSTR_VAL(unmangled), ZSTR_LEN(unmangled),
0);
} else {
new_key = zend_mangle_property_name(
ZSTR_VAL(existing_propinfo->ce->name), ZSTR_LEN(existing_propinfo->ce->name),
ZSTR_VAL(unmangled), ZSTR_LEN(unmangled),
0);
}
zend_string_release_ex(unmangled, 0);
} else {
ZEND_ASSERT(existing_propinfo->flags & ZEND_ACC_PUBLIC);
new_key = unmangled;
}
zend_string_release_ex(Z_STR(key), 0);
ZVAL_STR(&key, new_key);
} else {
zend_string_release_ex(unmangled, 0);
}
}
if ((old_data = zend_hash_find(ht, Z_STR(key))) != NULL) {
if (Z_TYPE_P(old_data) == IS_INDIRECT) {
old_data = Z_INDIRECT_P(old_data);
}
var_push_dtor(var_hash, old_data);
data = zend_hash_update_ind(ht, Z_STR(key), &d);
} else {
data = zend_hash_add_new(ht, Z_STR(key), &d);
}
} else if (Z_TYPE(key) == IS_LONG) {
/* object properties should include no integers */
convert_to_string(&key);
goto string_key;
} else {
zval_ptr_dtor(&key);
return 0;
}
}
if (!php_var_unserialize_internal(data, p, max, var_hash, 0)) {
zval_ptr_dtor(&key);
return 0;
}
var_push_dtor(var_hash, data);
zval_ptr_dtor(&key);
if (elements && *(*p-1) != ';' && *(*p-1) != '}') {
(*p)--;
return 0;
}
}
return 1;
}
static inline int finish_nested_data(UNSERIALIZE_PARAMETER)
{
if (*p >= max || **p != '}') {
return 0;
}
(*p)++;
return 1;
}
static inline int object_custom(UNSERIALIZE_PARAMETER, zend_class_entry *ce)
{
zend_long datalen;
datalen = parse_iv2((*p) + 2, p);
(*p) += 2;
if (datalen < 0 || (max - (*p)) <= datalen) {
zend_error(E_WARNING, "Insufficient data for unserializing - " ZEND_LONG_FMT " required, " ZEND_LONG_FMT " present", datalen, (zend_long)(max - (*p)));
return 0;
}
if (ce->unserialize == NULL) {
zend_error(E_WARNING, "Class %s has no unserializer", ZSTR_VAL(ce->name));
object_init_ex(rval, ce);
} else if (ce->unserialize(rval, ce, (const unsigned char*)*p, datalen, (zend_unserialize_data *)var_hash) != SUCCESS) {
return 0;
}
(*p) += datalen;
return finish_nested_data(UNSERIALIZE_PASSTHRU);
}
static inline zend_long object_common1(UNSERIALIZE_PARAMETER, zend_class_entry *ce)
{
zend_long elements;
if( *p >= max - 2) {
zend_error(E_WARNING, "Bad unserialize data");
return -1;
}
elements = parse_iv2((*p) + 2, p);
(*p) += 2;
if (ce->serialize == NULL) {
object_init_ex(rval, ce);
} else {
/* If this class implements Serializable, it should not land here but in object_custom(). The passed string
obviously doesn't descend from the regular serializer. */
zend_error(E_WARNING, "Erroneous data format for unserializing '%s'", ZSTR_VAL(ce->name));
return -1;
}
return elements;
}
#ifdef PHP_WIN32
# pragma optimize("", off)
#endif
static inline int object_common2(UNSERIALIZE_PARAMETER, zend_long elements)
{
HashTable *ht;
zend_bool has_wakeup;
if (Z_TYPE_P(rval) != IS_OBJECT) {
return 0;
}
has_wakeup = Z_OBJCE_P(rval) != PHP_IC_ENTRY
&& zend_hash_str_exists(&Z_OBJCE_P(rval)->function_table, "__wakeup", sizeof("__wakeup")-1);
ht = Z_OBJPROP_P(rval);
if (elements >= (zend_long)(HT_MAX_SIZE - zend_hash_num_elements(ht))) {
return 0;
}
zend_hash_extend(ht, zend_hash_num_elements(ht) + elements, HT_FLAGS(ht) & HASH_FLAG_PACKED);
if (!process_nested_data(UNSERIALIZE_PASSTHRU, ht, elements, 1)) {
if (has_wakeup) {
ZVAL_DEREF(rval);
GC_ADD_FLAGS(Z_OBJ_P(rval), IS_OBJ_DESTRUCTOR_CALLED);
}
return 0;
}
ZVAL_DEREF(rval);
if (has_wakeup) {
/* Delay __wakeup call until end of serialization */
zval *wakeup_var = var_tmp_var(var_hash);
ZVAL_COPY(wakeup_var, rval);
Z_EXTRA_P(wakeup_var) = VAR_WAKEUP_FLAG;
}
return finish_nested_data(UNSERIALIZE_PASSTHRU);
}
#ifdef PHP_WIN32
# pragma optimize("", on)
#endif
PHPAPI int php_var_unserialize(UNSERIALIZE_PARAMETER)
{
var_entries *orig_var_entries = (*var_hash)->last;
zend_long orig_used_slots = orig_var_entries ? orig_var_entries->used_slots : 0;
int result;
result = php_var_unserialize_internal(UNSERIALIZE_PASSTHRU, 0);
if (!result) {
/* If the unserialization failed, mark all elements that have been added to var_hash
* as NULL. This will forbid their use by other unserialize() calls in the same
* unserialization context. */
var_entries *e = orig_var_entries;
zend_long s = orig_used_slots;
while (e) {
for (; s < e->used_slots; s++) {
e->data[s] = NULL;
}
e = e->next;
s = 0;
}
}
return result;
}
static int php_var_unserialize_internal(UNSERIALIZE_PARAMETER, int as_key)
{
const unsigned char *cursor, *limit, *marker, *start;
zval *rval_ref;
limit = max;
cursor = *p;
if (YYCURSOR >= YYLIMIT) {
return 0;
}
if (var_hash && (*p)[0] != 'R') {
var_push(var_hash, rval);
}
start = cursor;
/*!re2c
"R:" uiv ";" {
zend_long id;
*p = YYCURSOR;
if (!var_hash) return 0;
id = parse_uiv(start + 2) - 1;
if (id == -1 || (rval_ref = var_access(var_hash, id)) == NULL) {
return 0;
}
if (Z_ISUNDEF_P(rval_ref) || (Z_ISREF_P(rval_ref) && Z_ISUNDEF_P(Z_REFVAL_P(rval_ref)))) {
return 0;
}
if (Z_ISREF_P(rval_ref)) {
ZVAL_COPY(rval, rval_ref);
} else {
ZVAL_NEW_REF(rval_ref, rval_ref);
ZVAL_COPY(rval, rval_ref);
}
return 1;
}
"r:" uiv ";" {
zend_long id;
*p = YYCURSOR;
if (!var_hash) return 0;
id = parse_uiv(start + 2) - 1;
if (id == -1 || (rval_ref = var_access(var_hash, id)) == NULL) {
return 0;
}
if (rval_ref == rval) {
return 0;
}
ZVAL_DEREF(rval_ref);
if (Z_TYPE_P(rval_ref) != IS_OBJECT) {
return 0;
}
ZVAL_COPY(rval, rval_ref);
return 1;
}
"N;" {
*p = YYCURSOR;
ZVAL_NULL(rval);
return 1;
}
"b:0;" {
*p = YYCURSOR;
ZVAL_FALSE(rval);
return 1;
}
"b:1;" {
*p = YYCURSOR;
ZVAL_TRUE(rval);
return 1;
}
"i:" iv ";" {
#if SIZEOF_ZEND_LONG == 4
int digits = YYCURSOR - start - 3;
if (start[2] == '-' || start[2] == '+') {
digits--;
}
/* Use double for large zend_long values that were serialized on a 64-bit system */
if (digits >= MAX_LENGTH_OF_LONG - 1) {
if (digits == MAX_LENGTH_OF_LONG - 1) {
int cmp = strncmp((char*)YYCURSOR - MAX_LENGTH_OF_LONG, long_min_digits, MAX_LENGTH_OF_LONG - 1);
if (!(cmp < 0 || (cmp == 0 && start[2] == '-'))) {
goto use_double;
}
} else {
goto use_double;
}
}
#endif
*p = YYCURSOR;
ZVAL_LONG(rval, parse_iv(start + 2));
return 1;
}
"d:" ("NAN" | "-"? "INF") ";" {
*p = YYCURSOR;
if (!strncmp((char*)start + 2, "NAN", 3)) {
ZVAL_DOUBLE(rval, ZEND_NAN);
} else if (!strncmp((char*)start + 2, "INF", 3)) {
ZVAL_DOUBLE(rval, ZEND_INFINITY);
} else if (!strncmp((char*)start + 2, "-INF", 4)) {
ZVAL_DOUBLE(rval, -ZEND_INFINITY);
} else {
ZVAL_NULL(rval);
}
return 1;
}
"d:" (iv | nv | nvexp) ";" {
#if SIZEOF_ZEND_LONG == 4
use_double:
#endif
*p = YYCURSOR;
ZVAL_DOUBLE(rval, zend_strtod((const char *)start + 2, NULL));
return 1;
}
"s:" uiv ":" ["] {
size_t len, maxlen;
char *str;
len = parse_uiv(start + 2);
maxlen = max - YYCURSOR;
if (maxlen < len) {
*p = start + 2;
return 0;
}
str = (char*)YYCURSOR;
YYCURSOR += len;
if (*(YYCURSOR) != '"') {
*p = YYCURSOR;
return 0;
}
if (*(YYCURSOR + 1) != ';') {
*p = YYCURSOR + 1;
return 0;
}
YYCURSOR += 2;
*p = YYCURSOR;
if (len == 0) {
ZVAL_EMPTY_STRING(rval);
} else if (len == 1) {
ZVAL_INTERNED_STR(rval, ZSTR_CHAR((zend_uchar)*str));
} else if (as_key) {
ZVAL_STR(rval, zend_string_init_interned(str, len, 0));
} else {
ZVAL_STRINGL(rval, str, len);
}
return 1;
}
"S:" uiv ":" ["] {
size_t len, maxlen;
zend_string *str;
len = parse_uiv(start + 2);
maxlen = max - YYCURSOR;
if (maxlen < len) {
*p = start + 2;
return 0;
}
if ((str = unserialize_str(&YYCURSOR, len, maxlen)) == NULL) {
return 0;
}
if (*(YYCURSOR) != '"') {
zend_string_efree(str);
*p = YYCURSOR;
return 0;
}
if (*(YYCURSOR + 1) != ';') {
efree(str);
*p = YYCURSOR + 1;
return 0;
}
YYCURSOR += 2;
*p = YYCURSOR;
ZVAL_STR(rval, str);
return 1;
}
"a:" uiv ":" "{" {
zend_long elements = parse_iv(start + 2);
/* use iv() not uiv() in order to check data range */
*p = YYCURSOR;
if (!var_hash) return 0;
if (elements < 0 || elements >= HT_MAX_SIZE) {
return 0;
}
if (elements) {
array_init_size(rval, elements);
/* we can't convert from packed to hash during unserialization, because
reference to some zvals might be keept in var_hash (to support references) */
zend_hash_real_init_mixed(Z_ARRVAL_P(rval));
} else {
ZVAL_EMPTY_ARRAY(rval);
return finish_nested_data(UNSERIALIZE_PASSTHRU);
}
/* The array may contain references to itself, in which case we'll be modifying an
* rc>1 array. This is okay, since the array is, ostensibly, only visible to
* unserialize (in practice unserialization handlers also see it). Ideally we should
* prohibit "r:" references to non-objects, as we only generate them for objects. */
HT_ALLOW_COW_VIOLATION(Z_ARRVAL_P(rval));
if (!process_nested_data(UNSERIALIZE_PASSTHRU, Z_ARRVAL_P(rval), elements, 0)) {
return 0;
}
return finish_nested_data(UNSERIALIZE_PASSTHRU);
}
"o:" uiv ":" ["] {
zend_long elements;
if (!var_hash) return 0;
elements = object_common1(UNSERIALIZE_PASSTHRU, ZEND_STANDARD_CLASS_DEF_PTR);
if (elements < 0 || elements >= HT_MAX_SIZE) {
return 0;
}
return object_common2(UNSERIALIZE_PASSTHRU, elements);
}
object ":" uiv ":" ["] {
size_t len, len2, len3, maxlen;
zend_long elements;
char *str;
zend_string *class_name;
zend_class_entry *ce;
int incomplete_class = 0;
int custom_object = 0;
zval user_func;
zval retval;
zval args[1];
if (!var_hash) return 0;
if (*start == 'C') {
custom_object = 1;
}
len2 = len = parse_uiv(start + 2);
maxlen = max - YYCURSOR;
if (maxlen < len || len == 0) {
*p = start + 2;
return 0;
}
str = (char*)YYCURSOR;
YYCURSOR += len;
if (*(YYCURSOR) != '"') {
*p = YYCURSOR;
return 0;
}
if (*(YYCURSOR+1) != ':') {
*p = YYCURSOR+1;
return 0;
}
len3 = strspn(str, "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 = zend_string_init(str, len, 0);
do {
if(!unserialize_allowed_class(class_name, var_hash)) {
incomplete_class = 1;
ce = PHP_IC_ENTRY;
break;
}
/* Try to find class directly */
BG(serialize_lock)++;
ce = zend_lookup_class(class_name);
if (ce) {
BG(serialize_lock)--;
if (EG(exception)) {
zend_string_release_ex(class_name, 0);
return 0;
}
break;
}
BG(serialize_lock)--;
if (EG(exception)) {
zend_string_release_ex(class_name, 0);
return 0;
}
/* 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 */
ZVAL_STRING(&user_func, PG(unserialize_callback_func));
ZVAL_STR_COPY(&args[0], class_name);
BG(serialize_lock)++;
if (call_user_function_ex(CG(function_table), NULL, &user_func, &retval, 1, args, 0, NULL) != SUCCESS) {
BG(serialize_lock)--;
if (EG(exception)) {
zend_string_release_ex(class_name, 0);
zval_ptr_dtor(&user_func);
zval_ptr_dtor(&args[0]);
return 0;
}
php_error_docref(NULL, E_WARNING, "defined (%s) but not found", Z_STRVAL(user_func));
incomplete_class = 1;
ce = PHP_IC_ENTRY;
zval_ptr_dtor(&user_func);
zval_ptr_dtor(&args[0]);
break;
}
BG(serialize_lock)--;
zval_ptr_dtor(&retval);
if (EG(exception)) {
zend_string_release_ex(class_name, 0);
zval_ptr_dtor(&user_func);
zval_ptr_dtor(&args[0]);
return 0;
}
/* The callback function may have defined the class */
BG(serialize_lock)++;
if ((ce = zend_lookup_class(class_name)) == NULL) {
php_error_docref(NULL, E_WARNING, "Function %s() hasn't defined the class it was called for", Z_STRVAL(user_func));
incomplete_class = 1;
ce = PHP_IC_ENTRY;
}
BG(serialize_lock)--;
zval_ptr_dtor(&user_func);
zval_ptr_dtor(&args[0]);
break;
} while (1);
*p = YYCURSOR;
if (custom_object) {
int ret;
ret = object_custom(UNSERIALIZE_PASSTHRU, ce);
if (ret && incomplete_class) {
php_store_class_name(rval, ZSTR_VAL(class_name), len2);
}
zend_string_release_ex(class_name, 0);
return ret;
}
elements = object_common1(UNSERIALIZE_PASSTHRU, ce);
if (elements < 0) {
zend_string_release_ex(class_name, 0);
return 0;
}
if (incomplete_class) {
php_store_class_name(rval, ZSTR_VAL(class_name), len2);
}
zend_string_release_ex(class_name, 0);
return object_common2(UNSERIALIZE_PASSTHRU, elements);
}
"}" {
/* this is the case where we have less data than planned */
php_error_docref(NULL, E_NOTICE, "Unexpected end of serialized data");
return 0; /* not sure if it should be 0 or 1 here? */
}
any { return 0; }
*/
return 0;
}
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