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php-src/ext/filter/filter.c
Nikita Popov cd2f2cd7d0 Deprecate FILTER_SANITIZE_MAGIC_QUOTES
2019-07-22 11:39:52 +02:00

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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 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> |
| Derick Rethans <derick@php.net> |
| Pierre-A. Joye <pierre@php.net> |
| Ilia Alshanetsky <iliaa@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php_filter.h"
ZEND_DECLARE_MODULE_GLOBALS(filter)
#include "filter_private.h"
typedef struct filter_list_entry {
const char *name;
int id;
void (*function)(PHP_INPUT_FILTER_PARAM_DECL);
} filter_list_entry;
/* {{{ filter_list */
static const filter_list_entry filter_list[] = {
{ "int", FILTER_VALIDATE_INT, php_filter_int },
{ "boolean", FILTER_VALIDATE_BOOLEAN, php_filter_boolean },
{ "float", FILTER_VALIDATE_FLOAT, php_filter_float },
{ "validate_regexp", FILTER_VALIDATE_REGEXP, php_filter_validate_regexp },
{ "validate_domain", FILTER_VALIDATE_DOMAIN, php_filter_validate_domain },
{ "validate_url", FILTER_VALIDATE_URL, php_filter_validate_url },
{ "validate_email", FILTER_VALIDATE_EMAIL, php_filter_validate_email },
{ "validate_ip", FILTER_VALIDATE_IP, php_filter_validate_ip },
{ "validate_mac", FILTER_VALIDATE_MAC, php_filter_validate_mac },
{ "string", FILTER_SANITIZE_STRING, php_filter_string },
{ "stripped", FILTER_SANITIZE_STRING, php_filter_string },
{ "encoded", FILTER_SANITIZE_ENCODED, php_filter_encoded },
{ "special_chars", FILTER_SANITIZE_SPECIAL_CHARS, php_filter_special_chars },
{ "full_special_chars", FILTER_SANITIZE_FULL_SPECIAL_CHARS, php_filter_full_special_chars },
{ "unsafe_raw", FILTER_UNSAFE_RAW, php_filter_unsafe_raw },
{ "email", FILTER_SANITIZE_EMAIL, php_filter_email },
{ "url", FILTER_SANITIZE_URL, php_filter_url },
{ "number_int", FILTER_SANITIZE_NUMBER_INT, php_filter_number_int },
{ "number_float", FILTER_SANITIZE_NUMBER_FLOAT, php_filter_number_float },
{ "magic_quotes", FILTER_SANITIZE_MAGIC_QUOTES, php_filter_magic_quotes },
{ "add_slashes", FILTER_SANITIZE_ADD_SLASHES, php_filter_add_slashes },
{ "callback", FILTER_CALLBACK, php_filter_callback },
};
/* }}} */
#ifndef PARSE_ENV
#define PARSE_ENV 4
#endif
#ifndef PARSE_SERVER
#define PARSE_SERVER 5
#endif
#ifndef PARSE_SESSION
#define PARSE_SESSION 6
#endif
static unsigned int php_sapi_filter(int arg, char *var, char **val, size_t val_len, size_t *new_val_len);
static unsigned int php_sapi_filter_init(void);
/* {{{ arginfo */
ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_input, 0, 0, 2)
ZEND_ARG_INFO(0, type)
ZEND_ARG_INFO(0, variable_name)
ZEND_ARG_INFO(0, filter)
ZEND_ARG_INFO(0, options)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_var, 0, 0, 1)
ZEND_ARG_INFO(0, variable)
ZEND_ARG_INFO(0, filter)
ZEND_ARG_INFO(0, options)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_input_array, 0, 0, 1)
ZEND_ARG_INFO(0, type)
ZEND_ARG_INFO(0, definition)
ZEND_ARG_INFO(0, add_empty)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_var_array, 0, 0, 1)
ZEND_ARG_INFO(0, data)
ZEND_ARG_INFO(0, definition)
ZEND_ARG_INFO(0, add_empty)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_filter_list, 0)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_has_var, 0, 0, 2)
ZEND_ARG_INFO(0, type)
ZEND_ARG_INFO(0, variable_name)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_filter_id, 0, 0, 1)
ZEND_ARG_INFO(0, filtername)
ZEND_END_ARG_INFO()
/* }}} */
/* {{{ filter_functions[]
*/
static const zend_function_entry filter_functions[] = {
PHP_FE(filter_input, arginfo_filter_input)
PHP_FE(filter_var, arginfo_filter_var)
PHP_FE(filter_input_array, arginfo_filter_input_array)
PHP_FE(filter_var_array, arginfo_filter_var_array)
PHP_FE(filter_list, arginfo_filter_list)
PHP_FE(filter_has_var, arginfo_filter_has_var)
PHP_FE(filter_id, arginfo_filter_id)
PHP_FE_END
};
/* }}} */
/* {{{ filter_module_entry
*/
zend_module_entry filter_module_entry = {
STANDARD_MODULE_HEADER,
"filter",
filter_functions,
PHP_MINIT(filter),
PHP_MSHUTDOWN(filter),
NULL,
PHP_RSHUTDOWN(filter),
PHP_MINFO(filter),
PHP_FILTER_VERSION,
STANDARD_MODULE_PROPERTIES
};
/* }}} */
#ifdef COMPILE_DL_FILTER
#ifdef ZTS
ZEND_TSRMLS_CACHE_DEFINE()
#endif
ZEND_GET_MODULE(filter)
#endif
static PHP_INI_MH(UpdateDefaultFilter) /* {{{ */
{
int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
for (i = 0; i < size; ++i) {
if ((strcasecmp(ZSTR_VAL(new_value), filter_list[i].name) == 0)) {
IF_G(default_filter) = filter_list[i].id;
return SUCCESS;
}
}
/* Fallback to the default filter */
IF_G(default_filter) = FILTER_DEFAULT;
return SUCCESS;
}
/* }}} */
/* {{{ PHP_INI
*/
static PHP_INI_MH(OnUpdateFlags)
{
if (!new_value) {
IF_G(default_filter_flags) = FILTER_FLAG_NO_ENCODE_QUOTES;
} else {
IF_G(default_filter_flags) = atoi(ZSTR_VAL(new_value));
}
return SUCCESS;
}
PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("filter.default", "unsafe_raw", PHP_INI_SYSTEM|PHP_INI_PERDIR, UpdateDefaultFilter, default_filter, zend_filter_globals, filter_globals)
PHP_INI_ENTRY("filter.default_flags", NULL, PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateFlags)
PHP_INI_END()
/* }}} */
static void php_filter_init_globals(zend_filter_globals *filter_globals) /* {{{ */
{
#if defined(COMPILE_DL_FILTER) && defined(ZTS)
ZEND_TSRMLS_CACHE_UPDATE();
#endif
ZVAL_UNDEF(&filter_globals->post_array);
ZVAL_UNDEF(&filter_globals->get_array);
ZVAL_UNDEF(&filter_globals->cookie_array);
ZVAL_UNDEF(&filter_globals->env_array);
ZVAL_UNDEF(&filter_globals->server_array);
#if 0
ZVAL_UNDEF(&filter_globals->session_array);
#endif
filter_globals->default_filter = FILTER_DEFAULT;
}
/* }}} */
#define PARSE_REQUEST 99
/* {{{ PHP_MINIT_FUNCTION
*/
PHP_MINIT_FUNCTION(filter)
{
ZEND_INIT_MODULE_GLOBALS(filter, php_filter_init_globals, NULL);
REGISTER_INI_ENTRIES();
REGISTER_LONG_CONSTANT("INPUT_POST", PARSE_POST, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("INPUT_GET", PARSE_GET, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("INPUT_COOKIE", PARSE_COOKIE, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("INPUT_ENV", PARSE_ENV, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("INPUT_SERVER", PARSE_SERVER, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("INPUT_SESSION", PARSE_SESSION, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("INPUT_REQUEST", PARSE_REQUEST, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_NONE", FILTER_FLAG_NONE, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_REQUIRE_SCALAR", FILTER_REQUIRE_SCALAR, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_REQUIRE_ARRAY", FILTER_REQUIRE_ARRAY, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FORCE_ARRAY", FILTER_FORCE_ARRAY, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_NULL_ON_FAILURE", FILTER_NULL_ON_FAILURE, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_VALIDATE_INT", FILTER_VALIDATE_INT, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_VALIDATE_BOOLEAN", FILTER_VALIDATE_BOOLEAN, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_VALIDATE_FLOAT", FILTER_VALIDATE_FLOAT, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_VALIDATE_REGEXP", FILTER_VALIDATE_REGEXP, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_VALIDATE_DOMAIN", FILTER_VALIDATE_DOMAIN, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_VALIDATE_URL", FILTER_VALIDATE_URL, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_VALIDATE_EMAIL", FILTER_VALIDATE_EMAIL, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_VALIDATE_IP", FILTER_VALIDATE_IP, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_VALIDATE_MAC", FILTER_VALIDATE_MAC, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_DEFAULT", FILTER_DEFAULT, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_UNSAFE_RAW", FILTER_UNSAFE_RAW, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_STRING", FILTER_SANITIZE_STRING, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_STRIPPED", FILTER_SANITIZE_STRING, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_ENCODED", FILTER_SANITIZE_ENCODED, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_SPECIAL_CHARS", FILTER_SANITIZE_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_FULL_SPECIAL_CHARS", FILTER_SANITIZE_FULL_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_EMAIL", FILTER_SANITIZE_EMAIL, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_URL", FILTER_SANITIZE_URL, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_NUMBER_INT", FILTER_SANITIZE_NUMBER_INT, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_NUMBER_FLOAT", FILTER_SANITIZE_NUMBER_FLOAT, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_MAGIC_QUOTES", FILTER_SANITIZE_MAGIC_QUOTES, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_SANITIZE_ADD_SLASHES", FILTER_SANITIZE_ADD_SLASHES, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_CALLBACK", FILTER_CALLBACK, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_OCTAL", FILTER_FLAG_ALLOW_OCTAL, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_HEX", FILTER_FLAG_ALLOW_HEX, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_LOW", FILTER_FLAG_STRIP_LOW, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_HIGH", FILTER_FLAG_STRIP_HIGH, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_BACKTICK", FILTER_FLAG_STRIP_BACKTICK, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_LOW", FILTER_FLAG_ENCODE_LOW, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_HIGH", FILTER_FLAG_ENCODE_HIGH, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_AMP", FILTER_FLAG_ENCODE_AMP, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_ENCODE_QUOTES", FILTER_FLAG_NO_ENCODE_QUOTES, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_EMPTY_STRING_NULL", FILTER_FLAG_EMPTY_STRING_NULL, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_FRACTION", FILTER_FLAG_ALLOW_FRACTION, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_THOUSAND", FILTER_FLAG_ALLOW_THOUSAND, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_SCIENTIFIC", FILTER_FLAG_ALLOW_SCIENTIFIC, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_SCHEME_REQUIRED", FILTER_FLAG_SCHEME_REQUIRED, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_HOST_REQUIRED", FILTER_FLAG_HOST_REQUIRED, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_PATH_REQUIRED", FILTER_FLAG_PATH_REQUIRED, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_QUERY_REQUIRED", FILTER_FLAG_QUERY_REQUIRED, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_IPV4", FILTER_FLAG_IPV4, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_IPV6", FILTER_FLAG_IPV6, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_RES_RANGE", FILTER_FLAG_NO_RES_RANGE, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_PRIV_RANGE", FILTER_FLAG_NO_PRIV_RANGE, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_HOSTNAME", FILTER_FLAG_HOSTNAME, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_EMAIL_UNICODE", FILTER_FLAG_EMAIL_UNICODE, CONST_CS | CONST_PERSISTENT);
sapi_register_input_filter(php_sapi_filter, php_sapi_filter_init);
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MSHUTDOWN_FUNCTION
*/
PHP_MSHUTDOWN_FUNCTION(filter)
{
UNREGISTER_INI_ENTRIES();
return SUCCESS;
}
/* }}} */
/* {{{ PHP_RSHUTDOWN_FUNCTION
*/
#define VAR_ARRAY_COPY_DTOR(a) \
if (!Z_ISUNDEF(IF_G(a))) { \
zval_ptr_dtor(&IF_G(a)); \
ZVAL_UNDEF(&IF_G(a)); \
}
PHP_RSHUTDOWN_FUNCTION(filter)
{
VAR_ARRAY_COPY_DTOR(get_array)
VAR_ARRAY_COPY_DTOR(post_array)
VAR_ARRAY_COPY_DTOR(cookie_array)
VAR_ARRAY_COPY_DTOR(server_array)
VAR_ARRAY_COPY_DTOR(env_array)
#if 0
VAR_ARRAY_COPY_DTOR(session_array)
#endif
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MINFO_FUNCTION
*/
PHP_MINFO_FUNCTION(filter)
{
php_info_print_table_start();
php_info_print_table_row( 2, "Input Validation and Filtering", "enabled" );
php_info_print_table_end();
DISPLAY_INI_ENTRIES();
}
/* }}} */
static filter_list_entry php_find_filter(zend_long id) /* {{{ */
{
int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
for (i = 0; i < size; ++i) {
if (filter_list[i].id == id) {
return filter_list[i];
}
}
/* Fallback to "string" filter */
for (i = 0; i < size; ++i) {
if (filter_list[i].id == FILTER_DEFAULT) {
return filter_list[i];
}
}
/* To shut up GCC */
return filter_list[0];
}
/* }}} */
static unsigned int php_sapi_filter_init(void)
{
ZVAL_UNDEF(&IF_G(get_array));
ZVAL_UNDEF(&IF_G(post_array));
ZVAL_UNDEF(&IF_G(cookie_array));
ZVAL_UNDEF(&IF_G(server_array));
ZVAL_UNDEF(&IF_G(env_array));
#if 0
ZVAL_UNDEF(&IF_G(session_array));
#endif
return SUCCESS;
}
static void php_zval_filter(zval *value, zend_long filter, zend_long flags, zval *options, char* charset, zend_bool copy) /* {{{ */
{
filter_list_entry filter_func;
filter_func = php_find_filter(filter);
if (!filter_func.id) {
/* Find default filter */
filter_func = php_find_filter(FILTER_DEFAULT);
}
/* #49274, fatal error with object without a toString method
Fails nicely instead of getting a recovarable fatal error. */
if (Z_TYPE_P(value) == IS_OBJECT) {
zend_class_entry *ce;
ce = Z_OBJCE_P(value);
if (!ce->__tostring) {
zval_ptr_dtor(value);
/* #67167: doesn't return null on failure for objects */
if (flags & FILTER_NULL_ON_FAILURE) {
ZVAL_NULL(value);
} else {
ZVAL_FALSE(value);
}
goto handle_default;
}
}
/* Here be strings */
convert_to_string(value);
filter_func.function(value, flags, options, charset);
handle_default:
if (options && Z_TYPE_P(options) == IS_ARRAY &&
((flags & FILTER_NULL_ON_FAILURE && Z_TYPE_P(value) == IS_NULL) ||
(!(flags & FILTER_NULL_ON_FAILURE) && Z_TYPE_P(value) == IS_FALSE))) {
zval *tmp;
if ((tmp = zend_hash_str_find(Z_ARRVAL_P(options), "default", sizeof("default") - 1)) != NULL) {
ZVAL_COPY(value, tmp);
}
}
}
/* }}} */
static unsigned int php_sapi_filter(int arg, char *var, char **val, size_t val_len, size_t *new_val_len) /* {{{ */
{
zval new_var, raw_var;
zval *array_ptr = NULL, *orig_array_ptr = NULL;
int retval = 0;
assert(*val != NULL);
#define PARSE_CASE(s,a,t) \
case s: \
if (Z_ISUNDEF(IF_G(a))) { \
array_init(&IF_G(a)); \
} \
array_ptr = &IF_G(a); \
orig_array_ptr = &PG(http_globals)[t]; \
break;
switch (arg) {
PARSE_CASE(PARSE_POST, post_array, TRACK_VARS_POST)
PARSE_CASE(PARSE_GET, get_array, TRACK_VARS_GET)
PARSE_CASE(PARSE_COOKIE, cookie_array, TRACK_VARS_COOKIE)
PARSE_CASE(PARSE_SERVER, server_array, TRACK_VARS_SERVER)
PARSE_CASE(PARSE_ENV, env_array, TRACK_VARS_ENV)
case PARSE_STRING: /* PARSE_STRING is used by parse_str() function */
retval = 1;
break;
}
/*
* According to rfc2965, more specific paths are listed above the less specific ones.
* If we encounter a duplicate cookie name, we should skip it, since it is not possible
* to have the same (plain text) cookie name for the same path and we should not overwrite
* more specific cookies with the less specific ones.
*/
if (arg == PARSE_COOKIE && orig_array_ptr &&
zend_symtable_str_exists(Z_ARRVAL_P(orig_array_ptr), var, strlen(var))) {
return 0;
}
if (array_ptr) {
/* Store the RAW variable internally */
ZVAL_STRINGL(&raw_var, *val, val_len);
php_register_variable_ex(var, &raw_var, array_ptr);
}
if (val_len) {
/* Register mangled variable */
if (IF_G(default_filter) != FILTER_UNSAFE_RAW) {
ZVAL_STRINGL(&new_var, *val, val_len);
php_zval_filter(&new_var, IF_G(default_filter), IF_G(default_filter_flags), NULL, NULL, 0);
} else {
ZVAL_STRINGL(&new_var, *val, val_len);
}
} else { /* empty string */
ZVAL_EMPTY_STRING(&new_var);
}
if (orig_array_ptr) {
php_register_variable_ex(var, &new_var, orig_array_ptr);
}
if (retval) {
if (new_val_len) {
*new_val_len = Z_STRLEN(new_var);
}
efree(*val);
if (Z_STRLEN(new_var)) {
*val = estrndup(Z_STRVAL(new_var), Z_STRLEN(new_var));
} else {
*val = estrdup("");
}
zval_ptr_dtor(&new_var);
}
return retval;
}
/* }}} */
static void php_zval_filter_recursive(zval *value, zend_long filter, zend_long flags, zval *options, char *charset, zend_bool copy) /* {{{ */
{
if (Z_TYPE_P(value) == IS_ARRAY) {
zval *element;
if (Z_IS_RECURSIVE_P(value)) {
return;
}
Z_PROTECT_RECURSION_P(value);
ZEND_HASH_FOREACH_VAL(Z_ARRVAL_P(value), element) {
ZVAL_DEREF(element);
if (Z_TYPE_P(element) == IS_ARRAY) {
SEPARATE_ARRAY(element);
php_zval_filter_recursive(element, filter, flags, options, charset, copy);
} else {
php_zval_filter(element, filter, flags, options, charset, copy);
}
} ZEND_HASH_FOREACH_END();
Z_UNPROTECT_RECURSION_P(value);
} else {
php_zval_filter(value, filter, flags, options, charset, copy);
}
}
/* }}} */
static zval *php_filter_get_storage(zend_long arg)/* {{{ */
{
zval *array_ptr = NULL;
switch (arg) {
case PARSE_GET:
array_ptr = &IF_G(get_array);
break;
case PARSE_POST:
array_ptr = &IF_G(post_array);
break;
case PARSE_COOKIE:
array_ptr = &IF_G(cookie_array);
break;
case PARSE_SERVER:
if (PG(auto_globals_jit)) {
zend_is_auto_global_str(ZEND_STRL("_SERVER"));
}
array_ptr = &IF_G(server_array);
break;
case PARSE_ENV:
if (PG(auto_globals_jit)) {
zend_is_auto_global_str(ZEND_STRL("_ENV"));
}
array_ptr = !Z_ISUNDEF(IF_G(env_array)) ? &IF_G(env_array) : &PG(http_globals)[TRACK_VARS_ENV];
break;
case PARSE_SESSION:
/* FIXME: Implement session source */
php_error_docref(NULL, E_WARNING, "INPUT_SESSION is not yet implemented");
break;
case PARSE_REQUEST:
/* FIXME: Implement request source */
php_error_docref(NULL, E_WARNING, "INPUT_REQUEST is not yet implemented");
break;
}
if (array_ptr && Z_TYPE_P(array_ptr) != IS_ARRAY) {
/* Storage not initialized */
return NULL;
}
return array_ptr;
}
/* }}} */
/* {{{ proto mixed filter_has_var(constant type, string variable_name)
* Returns true if the variable with the name 'name' exists in source.
*/
PHP_FUNCTION(filter_has_var)
{
zend_long arg;
zend_string *var;
zval *array_ptr = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "lS", &arg, &var) == FAILURE) {
RETURN_FALSE;
}
array_ptr = php_filter_get_storage(arg);
if (array_ptr && zend_hash_exists(Z_ARRVAL_P(array_ptr), var)) {
RETURN_TRUE;
}
RETURN_FALSE;
}
/* }}} */
static void php_filter_call(zval *filtered, zend_long filter, zval *filter_args, const int copy, zend_long filter_flags) /* {{{ */
{
zval *options = NULL;
zval *option;
char *charset = NULL;
if (filter_args && Z_TYPE_P(filter_args) != IS_ARRAY) {
zend_long lval = zval_get_long(filter_args);
if (filter != -1) { /* handler for array apply */
/* filter_args is the filter_flags */
filter_flags = lval;
if (!(filter_flags & FILTER_REQUIRE_ARRAY || filter_flags & FILTER_FORCE_ARRAY)) {
filter_flags |= FILTER_REQUIRE_SCALAR;
}
} else {
filter = lval;
}
} else if (filter_args) {
if ((option = zend_hash_str_find(Z_ARRVAL_P(filter_args), "filter", sizeof("filter") - 1)) != NULL) {
filter = zval_get_long(option);
}
if ((option = zend_hash_str_find(Z_ARRVAL_P(filter_args), "flags", sizeof("flags") - 1)) != NULL) {
filter_flags = zval_get_long(option);
if (!(filter_flags & FILTER_REQUIRE_ARRAY || filter_flags & FILTER_FORCE_ARRAY)) {
filter_flags |= FILTER_REQUIRE_SCALAR;
}
}
if ((option = zend_hash_str_find_deref(Z_ARRVAL_P(filter_args), "options", sizeof("options") - 1)) != NULL) {
if (filter != FILTER_CALLBACK) {
if (Z_TYPE_P(option) == IS_ARRAY) {
options = option;
}
} else {
options = option;
filter_flags = 0;
}
}
}
if (Z_TYPE_P(filtered) == IS_ARRAY) {
if (filter_flags & FILTER_REQUIRE_SCALAR) {
zval_ptr_dtor(filtered);
if (filter_flags & FILTER_NULL_ON_FAILURE) {
ZVAL_NULL(filtered);
} else {
ZVAL_FALSE(filtered);
}
return;
}
php_zval_filter_recursive(filtered, filter, filter_flags, options, charset, copy);
return;
}
if (filter_flags & FILTER_REQUIRE_ARRAY) {
zval_ptr_dtor(filtered);
if (filter_flags & FILTER_NULL_ON_FAILURE) {
ZVAL_NULL(filtered);
} else {
ZVAL_FALSE(filtered);
}
return;
}
php_zval_filter(filtered, filter, filter_flags, options, charset, copy);
if (filter_flags & FILTER_FORCE_ARRAY) {
zval tmp;
ZVAL_COPY_VALUE(&tmp, filtered);
array_init(filtered);
add_next_index_zval(filtered, &tmp);
}
}
/* }}} */
static void php_filter_array_handler(zval *input, zval *op, zval *return_value, zend_bool add_empty) /* {{{ */
{
zend_string *arg_key;
zval *tmp, *arg_elm;
if (!op) {
ZVAL_DUP(return_value, input);
php_filter_call(return_value, FILTER_DEFAULT, NULL, 0, FILTER_REQUIRE_ARRAY);
} else if (Z_TYPE_P(op) == IS_LONG) {
ZVAL_DUP(return_value, input);
php_filter_call(return_value, Z_LVAL_P(op), NULL, 0, FILTER_REQUIRE_ARRAY);
} else if (Z_TYPE_P(op) == IS_ARRAY) {
array_init(return_value);
ZEND_HASH_FOREACH_STR_KEY_VAL(Z_ARRVAL_P(op), arg_key, arg_elm) {
if (arg_key == NULL) {
php_error_docref(NULL, E_WARNING, "Numeric keys are not allowed in the definition array");
zval_ptr_dtor(return_value);
RETURN_FALSE;
}
if (ZSTR_LEN(arg_key) == 0) {
php_error_docref(NULL, E_WARNING, "Empty keys are not allowed in the definition array");
zval_ptr_dtor(return_value);
RETURN_FALSE;
}
if ((tmp = zend_hash_find(Z_ARRVAL_P(input), arg_key)) == NULL) {
if (add_empty) {
add_assoc_null_ex(return_value, ZSTR_VAL(arg_key), ZSTR_LEN(arg_key));
}
} else {
zval nval;
ZVAL_DEREF(tmp);
ZVAL_DUP(&nval, tmp);
php_filter_call(&nval, -1, arg_elm, 0, FILTER_REQUIRE_SCALAR);
zend_hash_update(Z_ARRVAL_P(return_value), arg_key, &nval);
}
} ZEND_HASH_FOREACH_END();
} else {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto mixed filter_input(constant type, string variable_name [, int filter [, mixed options]])
* Returns the filtered variable 'name'* from source `type`.
*/
PHP_FUNCTION(filter_input)
{
zend_long fetch_from, filter = FILTER_DEFAULT;
zval *filter_args = NULL, *tmp;
zval *input = NULL;
zend_string *var;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "lS|lz", &fetch_from, &var, &filter, &filter_args) == FAILURE) {
return;
}
if (!PHP_FILTER_ID_EXISTS(filter)) {
RETURN_FALSE;
}
input = php_filter_get_storage(fetch_from);
if (!input || (tmp = zend_hash_find(Z_ARRVAL_P(input), var)) == NULL) {
zend_long filter_flags = 0;
zval *option, *opt, *def;
if (filter_args) {
if (Z_TYPE_P(filter_args) == IS_LONG) {
filter_flags = Z_LVAL_P(filter_args);
} else if (Z_TYPE_P(filter_args) == IS_ARRAY && (option = zend_hash_str_find(Z_ARRVAL_P(filter_args), "flags", sizeof("flags") - 1)) != NULL) {
filter_flags = zval_get_long(option);
}
if (Z_TYPE_P(filter_args) == IS_ARRAY &&
(opt = zend_hash_str_find_deref(Z_ARRVAL_P(filter_args), "options", sizeof("options") - 1)) != NULL &&
Z_TYPE_P(opt) == IS_ARRAY &&
(def = zend_hash_str_find_deref(Z_ARRVAL_P(opt), "default", sizeof("default") - 1)) != NULL) {
ZVAL_COPY(return_value, def);
return;
}
}
/* The FILTER_NULL_ON_FAILURE flag inverts the usual return values of
* the function: normally when validation fails false is returned, and
* when the input value doesn't exist NULL is returned. With the flag
* set, NULL and false should be returned, respectively. Ergo, although
* the code below looks incorrect, it's actually right. */
if (filter_flags & FILTER_NULL_ON_FAILURE) {
RETURN_FALSE;
} else {
RETURN_NULL();
}
}
ZVAL_DUP(return_value, tmp);
php_filter_call(return_value, filter, filter_args, 1, FILTER_REQUIRE_SCALAR);
}
/* }}} */
/* {{{ proto mixed filter_var(mixed variable [, int filter [, mixed options]])
* Returns the filtered version of the variable.
*/
PHP_FUNCTION(filter_var)
{
zend_long filter = FILTER_DEFAULT;
zval *filter_args = NULL, *data;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z|lz", &data, &filter, &filter_args) == FAILURE) {
return;
}
if (!PHP_FILTER_ID_EXISTS(filter)) {
RETURN_FALSE;
}
ZVAL_DUP(return_value, data);
php_filter_call(return_value, filter, filter_args, 1, FILTER_REQUIRE_SCALAR);
}
/* }}} */
/* {{{ proto mixed filter_input_array(constant type, [, mixed options [, bool add_empty]]])
* Returns an array with all arguments defined in 'definition'.
*/
PHP_FUNCTION(filter_input_array)
{
zend_long fetch_from;
zval *array_input = NULL, *op = NULL;
zend_bool add_empty = 1;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l|zb", &fetch_from, &op, &add_empty) == FAILURE) {
return;
}
if (op && (Z_TYPE_P(op) != IS_ARRAY) && !(Z_TYPE_P(op) == IS_LONG && PHP_FILTER_ID_EXISTS(Z_LVAL_P(op)))) {
RETURN_FALSE;
}
array_input = php_filter_get_storage(fetch_from);
if (!array_input) {
zend_long filter_flags = 0;
zval *option;
if (op) {
if (Z_TYPE_P(op) == IS_LONG) {
filter_flags = Z_LVAL_P(op);
} else if (Z_TYPE_P(op) == IS_ARRAY && (option = zend_hash_str_find(Z_ARRVAL_P(op), "flags", sizeof("flags") - 1)) != NULL) {
filter_flags = zval_get_long(option);
}
}
/* The FILTER_NULL_ON_FAILURE flag inverts the usual return values of
* the function: normally when validation fails false is returned, and
* when the input value doesn't exist NULL is returned. With the flag
* set, NULL and false should be returned, respectively. Ergo, although
* the code below looks incorrect, it's actually right. */
if (filter_flags & FILTER_NULL_ON_FAILURE) {
RETURN_FALSE;
} else {
RETURN_NULL();
}
}
php_filter_array_handler(array_input, op, return_value, add_empty);
}
/* }}} */
/* {{{ proto mixed filter_var_array(array data, [, mixed options [, bool add_empty]]])
* Returns an array with all arguments defined in 'definition'.
*/
PHP_FUNCTION(filter_var_array)
{
zval *array_input = NULL, *op = NULL;
zend_bool add_empty = 1;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "a|zb", &array_input, &op, &add_empty) == FAILURE) {
return;
}
if (op && (Z_TYPE_P(op) != IS_ARRAY) && !(Z_TYPE_P(op) == IS_LONG && PHP_FILTER_ID_EXISTS(Z_LVAL_P(op)))) {
RETURN_FALSE;
}
php_filter_array_handler(array_input, op, return_value, add_empty);
}
/* }}} */
/* {{{ proto filter_list()
* Returns a list of all supported filters */
PHP_FUNCTION(filter_list)
{
int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
if (zend_parse_parameters_none() == FAILURE) {
return;
}
array_init(return_value);
for (i = 0; i < size; ++i) {
add_next_index_string(return_value, (char *)filter_list[i].name);
}
}
/* }}} */
/* {{{ proto filter_id(string filtername)
* Returns the filter ID belonging to a named filter */
PHP_FUNCTION(filter_id)
{
int i;
size_t filter_len;
int size = sizeof(filter_list) / sizeof(filter_list_entry);
char *filter;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &filter, &filter_len) == FAILURE) {
return;
}
for (i = 0; i < size; ++i) {
if (strcmp(filter_list[i].name, filter) == 0) {
RETURN_LONG(filter_list[i].id);
}
}
RETURN_FALSE;
}
/* }}} */
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