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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 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> |
+----------------------------------------------------------------------+
*/

/* $Id$ */

#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_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 },

{ "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 },

{ "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, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC);
static unsigned int php_sapi_filter_init(TSRMLS_D);

/* {{{ 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 = {
#if ZEND_MODULE_API_NO >= 20010901
STANDARD_MODULE_HEADER,
#endif
"filter",
filter_functions,
PHP_MINIT(filter),
PHP_MSHUTDOWN(filter),
NULL,
PHP_RSHUTDOWN(filter),
PHP_MINFO(filter),
"0.11.0",
STANDARD_MODULE_PROPERTIES
};
/* }}} */

#ifdef COMPILE_DL_FILTER
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(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(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) /* {{{ */
{
filter_globals->post_array = NULL;
filter_globals->get_array = NULL;
filter_globals->cookie_array = NULL;
filter_globals->env_array = NULL;
filter_globals->server_array = NULL;
filter_globals->session_array = NULL;
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_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_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_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_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);

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 (IF_G(a)) { \
zval_ptr_dtor(&IF_G(a)); \
IF_G(a) = NULL; \
}

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)
VAR_ARRAY_COPY_DTOR(session_array)
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_row( 2, "Revision", "$Id$");
php_info_print_table_end();

DISPLAY_INI_ENTRIES();
}
/* }}} */

static filter_list_entry php_find_filter(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(TSRMLS_D)
{
IF_G(get_array) = NULL;
IF_G(post_array) = NULL;
IF_G(cookie_array) = NULL;
IF_G(server_array) = NULL;
IF_G(env_array) = NULL;
IF_G(session_array) = NULL;
return SUCCESS;
}

static void php_zval_filter(zval **value, long filter, long flags, zval *options, char* charset, zend_bool copy TSRMLS_DC) /* {{{ */
{
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);
}

if (copy) {
SEPARATE_ZVAL(value);
}

/* #49274, fatal error with object without a toString method
Fails nicely instead of getting a recovarable fatal error. */
if (Z_TYPE_PP(value) == IS_OBJECT) {
zend_class_entry *ce;

ce = Z_OBJCE_PP(value);
if (!ce->__tostring) {
ZVAL_FALSE(*value);
return;
}
}

/* Here be strings */
convert_to_string(*value);

filter_func.function(*value, flags, options, charset TSRMLS_CC);

if (
options && (Z_TYPE_P(options) == IS_ARRAY || Z_TYPE_P(options) == IS_OBJECT) &&
((flags & FILTER_NULL_ON_FAILURE && Z_TYPE_PP(value) == IS_NULL) ||
(!(flags & FILTER_NULL_ON_FAILURE) && Z_TYPE_PP(value) == IS_BOOL && Z_LVAL_PP(value) == 0)) &&
zend_hash_exists(HASH_OF(options), "default", sizeof("default"))
) {
zval **tmp;
if (zend_hash_find(HASH_OF(options), "default", sizeof("default"), (void **)&tmp) == SUCCESS) {
MAKE_COPY_ZVAL(tmp, *value);
}
}
}
/* }}} */

static unsigned int php_sapi_filter(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC) /* {{{ */
{
zval new_var, raw_var;
zval *array_ptr = NULL, *orig_array_ptr = NULL;
char *orig_var = NULL;
int retval = 0;

assert(*val != NULL);

#define PARSE_CASE(s,a,t) \
case s: \
if (!IF_G(a)) { \
ALLOC_ZVAL(array_ptr); \
array_init(array_ptr); \
INIT_PZVAL(array_ptr); \
IF_G(a) = array_ptr; \
} else { \
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_exists(Z_ARRVAL_P(orig_array_ptr), var, strlen(var)+1)) {
return 0;
}

if (array_ptr) {
/* Make a copy of the variable name, as php_register_variable_ex seems to
* modify it */
orig_var = estrdup(var);

/* Store the RAW variable internally */
/* FIXME: Should not use php_register_variable_ex as that also registers
* globals when register_globals is turned on */
Z_STRLEN(raw_var) = val_len;
Z_STRVAL(raw_var) = estrndup(*val, val_len);
Z_TYPE(raw_var) = IS_STRING;

php_register_variable_ex(var, &raw_var, array_ptr TSRMLS_CC);
}

if (val_len) {
/* Register mangled variable */
/* FIXME: Should not use php_register_variable_ex as that also registers
* globals when register_globals is turned on */
Z_STRLEN(new_var) = val_len;
Z_TYPE(new_var) = IS_STRING;

if (IF_G(default_filter) != FILTER_UNSAFE_RAW) {
zval *tmp_new_var = &new_var;
Z_STRVAL(new_var) = estrndup(*val, val_len);
INIT_PZVAL(tmp_new_var);
php_zval_filter(&tmp_new_var, IF_G(default_filter), IF_G(default_filter_flags), NULL, NULL/*charset*/, 0 TSRMLS_CC);
} else if (PG(magic_quotes_gpc) && !retval) { /* for PARSE_STRING php_register_variable_safe() will do the addslashes() */
Z_STRVAL(new_var) = php_addslashes(*val, Z_STRLEN(new_var), &Z_STRLEN(new_var), 0 TSRMLS_CC);
} else {
Z_STRVAL(new_var) = estrndup(*val, val_len);
}
} else { /* empty string */
ZVAL_EMPTY_STRING(&new_var);
}

if (orig_array_ptr) {
php_register_variable_ex(orig_var, &new_var, orig_array_ptr TSRMLS_CC);
}
if (array_ptr) {
efree(orig_var);
}

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_dtor(&new_var);
}

return retval;
}
/* }}} */

static void php_zval_filter_recursive(zval **value, long filter, long flags, zval *options, char *charset, zend_bool copy TSRMLS_DC) /* {{{ */
{
if (Z_TYPE_PP(value) == IS_ARRAY) {
zval **element;
HashPosition pos;

if (Z_ARRVAL_PP(value)->nApplyCount > 1) {
return;
}

for (zend_hash_internal_pointer_reset_ex(Z_ARRVAL_PP(value), &pos);
zend_hash_get_current_data_ex(Z_ARRVAL_PP(value), (void **) &element, &pos) == SUCCESS;
zend_hash_move_forward_ex(Z_ARRVAL_PP(value), &pos)
) {
SEPARATE_ZVAL_IF_NOT_REF(element);
if (Z_TYPE_PP(element) == IS_ARRAY) {
Z_ARRVAL_PP(element)->nApplyCount++;
php_zval_filter_recursive(element, filter, flags, options, charset, copy TSRMLS_CC);
Z_ARRVAL_PP(element)->nApplyCount--;
} else {
php_zval_filter(element, filter, flags, options, charset, copy TSRMLS_CC);
}
}
} else {
php_zval_filter(value, filter, flags, options, charset, copy TSRMLS_CC);
}
}
/* }}} */

static zval *php_filter_get_storage(long arg TSRMLS_DC)/* {{{ */

{
zval *array_ptr = NULL;
zend_bool jit_initialization = (PG(auto_globals_jit) && !PG(register_globals) && !PG(register_long_arrays));

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 (jit_initialization) {
zend_is_auto_global("_SERVER", sizeof("_SERVER")-1 TSRMLS_CC);
}
array_ptr = IF_G(server_array);
break;
case PARSE_ENV:
if (jit_initialization) {
zend_is_auto_global("_ENV", sizeof("_ENV")-1 TSRMLS_CC);
}
array_ptr = 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 TSRMLS_CC, E_WARNING, "INPUT_SESSION is not yet implemented");
break;
case PARSE_REQUEST:
/* FIXME: Implement request source */
php_error_docref(NULL TSRMLS_CC, E_WARNING, "INPUT_REQUEST is not yet implemented");
break;
}

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)
{
long arg;
char *var;
int var_len;
zval *array_ptr = NULL;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ls", &arg, &var, &var_len) == FAILURE) {
RETURN_FALSE;
}

array_ptr = php_filter_get_storage(arg TSRMLS_CC);

if (array_ptr && HASH_OF(array_ptr) && zend_hash_exists(HASH_OF(array_ptr), var, var_len + 1)) {
RETURN_TRUE;
}

RETURN_FALSE;
}
/* }}} */

static void php_filter_call(zval **filtered, long filter, zval **filter_args, const int copy, long filter_flags TSRMLS_DC) /* {{{ */
{
zval *options = NULL;
zval **option;
char *charset = NULL;

if (filter_args && Z_TYPE_PP(filter_args) != IS_ARRAY) {
long lval;

PHP_FILTER_GET_LONG_OPT(filter_args, lval);

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 (zend_hash_find(HASH_OF(*filter_args), "filter", sizeof("filter"), (void **)&option) == SUCCESS) {
PHP_FILTER_GET_LONG_OPT(option, filter);
}

if (zend_hash_find(HASH_OF(*filter_args), "flags", sizeof("flags"), (void **)&option) == SUCCESS) {
PHP_FILTER_GET_LONG_OPT(option, filter_flags);

if (!(filter_flags & FILTER_REQUIRE_ARRAY || filter_flags & FILTER_FORCE_ARRAY)) {
filter_flags |= FILTER_REQUIRE_SCALAR;
}
}

if (zend_hash_find(HASH_OF(*filter_args), "options", sizeof("options"), (void **)&option) == SUCCESS) {
if (filter != FILTER_CALLBACK) {
if (Z_TYPE_PP(option) == IS_ARRAY) {
options = *option;
}
} else {
options = *option;
filter_flags = 0;
}
}
}

if (Z_TYPE_PP(filtered) == IS_ARRAY) {
if (filter_flags & FILTER_REQUIRE_SCALAR) {
if (copy) {
SEPARATE_ZVAL(filtered);
}
zval_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 TSRMLS_CC);
return;
}
if (filter_flags & FILTER_REQUIRE_ARRAY) {
if (copy) {
SEPARATE_ZVAL(filtered);
}
zval_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 TSRMLS_CC);
if (filter_flags & FILTER_FORCE_ARRAY) {
zval *tmp;

ALLOC_ZVAL(tmp);
MAKE_COPY_ZVAL(filtered, tmp);

zval_dtor(*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 TSRMLS_DC) /* {{{ */
{
char *arg_key;
uint arg_key_len;
ulong index;
HashPosition pos;
zval **tmp, **arg_elm;

if (!op) {
zval_dtor(return_value);
MAKE_COPY_ZVAL(&input, return_value);
php_filter_call(&return_value, FILTER_DEFAULT, NULL, 0, FILTER_REQUIRE_ARRAY TSRMLS_CC);
} else if (Z_TYPE_PP(op) == IS_LONG) {
zval_dtor(return_value);
MAKE_COPY_ZVAL(&input, return_value);
php_filter_call(&return_value, Z_LVAL_PP(op), NULL, 0, FILTER_REQUIRE_ARRAY TSRMLS_CC);
} else if (Z_TYPE_PP(op) == IS_ARRAY) {
array_init(return_value);

zend_hash_internal_pointer_reset(Z_ARRVAL_PP(op));
for (zend_hash_internal_pointer_reset_ex(Z_ARRVAL_PP(op), &pos);
zend_hash_get_current_data_ex(Z_ARRVAL_PP(op), (void **) &arg_elm, &pos) == SUCCESS;
zend_hash_move_forward_ex(Z_ARRVAL_PP(op), &pos))
{
if (zend_hash_get_current_key_ex(Z_ARRVAL_PP(op), &arg_key, &arg_key_len, &index, 0, &pos) != HASH_KEY_IS_STRING) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Numeric keys are not allowed in the definition array");
zval_dtor(return_value);
RETURN_FALSE;
}
if (arg_key_len < 2) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Empty keys are not allowed in the definition array");
zval_dtor(return_value);
RETURN_FALSE;
}
if (zend_hash_find(Z_ARRVAL_P(input), arg_key, arg_key_len, (void **)&tmp) != SUCCESS) {
if (add_empty) {
add_assoc_null_ex(return_value, arg_key, arg_key_len);
}
} else {
zval *nval;

ALLOC_ZVAL(nval);
MAKE_COPY_ZVAL(tmp, nval);

php_filter_call(&nval, -1, arg_elm, 0, FILTER_REQUIRE_SCALAR TSRMLS_CC);
add_assoc_zval_ex(return_value, arg_key, arg_key_len, nval);
}
}
} else {
RETURN_FALSE;
}
}
/* }}} */

/* {{{ proto mixed filter_input(constant type, string variable_name [, long filter [, mixed options]])
* Returns the filtered variable 'name'* from source `type`.
*/
PHP_FUNCTION(filter_input)
{
long fetch_from, filter = FILTER_DEFAULT;
zval **filter_args = NULL, **tmp;
zval *input = NULL;
char *var;
int var_len;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ls|lZ", &fetch_from, &var, &var_len, &filter, &filter_args) == FAILURE) {
return;
}

if (!PHP_FILTER_ID_EXISTS(filter)) {
RETURN_FALSE;
}

input = php_filter_get_storage(fetch_from TSRMLS_CC);

if (!input || !HASH_OF(input) || zend_hash_find(HASH_OF(input), var, var_len + 1, (void **)&tmp) != SUCCESS) {
long filter_flags = 0;
zval **option, **opt, **def;
if (filter_args) {
if (Z_TYPE_PP(filter_args) == IS_LONG) {
filter_flags = Z_LVAL_PP(filter_args);
} else if (Z_TYPE_PP(filter_args) == IS_ARRAY && zend_hash_find(HASH_OF(*filter_args), "flags", sizeof("flags"), (void **)&option) == SUCCESS) {
PHP_FILTER_GET_LONG_OPT(option, filter_flags);
}
if (Z_TYPE_PP(filter_args) == IS_ARRAY &&
zend_hash_find(HASH_OF(*filter_args), "options", sizeof("options"), (void **)&opt) == SUCCESS &&
Z_TYPE_PP(opt) == IS_ARRAY &&
zend_hash_find(HASH_OF(*opt), "default", sizeof("default"), (void **)&def) == SUCCESS
) {
MAKE_COPY_ZVAL(def, return_value);
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();
}
}

MAKE_COPY_ZVAL(tmp, return_value);

php_filter_call(&return_value, filter, filter_args, 1, FILTER_REQUIRE_SCALAR TSRMLS_CC);
}
/* }}} */

/* {{{ proto mixed filter_var(mixed variable [, long filter [, mixed options]])
* Returns the filtered version of the vriable.
*/
PHP_FUNCTION(filter_var)
{
long filter = FILTER_DEFAULT;
zval **filter_args = NULL, *data;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z/|lZ", &data, &filter, &filter_args) == FAILURE) {
return;
}

if (!PHP_FILTER_ID_EXISTS(filter)) {
RETURN_FALSE;
}

MAKE_COPY_ZVAL(&data, return_value);

php_filter_call(&return_value, filter, filter_args, 1, FILTER_REQUIRE_SCALAR TSRMLS_CC);
}
/* }}} */

/* {{{ 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)
{
long fetch_from;
zval *array_input = NULL, **op = NULL;
zend_bool add_empty = 1;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|Zb", &fetch_from, &op, &add_empty) == FAILURE) {
return;
}

if (op
&& (Z_TYPE_PP(op) != IS_ARRAY)
&& (Z_TYPE_PP(op) == IS_LONG && !PHP_FILTER_ID_EXISTS(Z_LVAL_PP(op)))
) {
RETURN_FALSE;
}

array_input = php_filter_get_storage(fetch_from TSRMLS_CC);

if (!array_input || !HASH_OF(array_input)) {
long filter_flags = 0;
zval **option;
if (op) {
if (Z_TYPE_PP(op) == IS_LONG) {
filter_flags = Z_LVAL_PP(op);
} else if (Z_TYPE_PP(op) == IS_ARRAY && zend_hash_find(HASH_OF(*op), "flags", sizeof("flags"), (void **)&option) == SUCCESS) {
PHP_FILTER_GET_LONG_OPT(option, filter_flags);
}
}

/* 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 TSRMLS_CC);
}
/* }}} */

/* {{{ 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() TSRMLS_CC, "a|Zb", &array_input, &op, &add_empty) == FAILURE) {
return;
}

if (op
&& (Z_TYPE_PP(op) != IS_ARRAY)
&& (Z_TYPE_PP(op) == IS_LONG && !PHP_FILTER_ID_EXISTS(Z_LVAL_PP(op)))
) {
RETURN_FALSE;
}

php_filter_array_handler(array_input, op, return_value, add_empty TSRMLS_CC);
}
/* }}} */

/* {{{ 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, 1);
}
}
/* }}} */

/* {{{ proto filter_id(string filtername)
* Returns the filter ID belonging to a named filter */
PHP_FUNCTION(filter_id)
{
int i, filter_len;
int size = sizeof(filter_list) / sizeof(filter_list_entry);
char *filter;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "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;
}
/* }}} */

/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
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