/
runkit_sandbox.c
1980 lines (1674 loc) · 58.2 KB
/
runkit_sandbox.c
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2006 The PHP Group, (c) 2008-2015 Dmitry Zenovich |
+----------------------------------------------------------------------+
| This source file is subject to the new BSD 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.opensource.org/licenses/BSD-3-Clause |
| If you did not receive a copy of the license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| dzenovich@gmail.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Sara Golemon <pollita@php.net> |
| Props: Wez Furlong |
| Modified by Dmitry Zenovich <dzenovich@gmail.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php_runkit.h"
#include "ext/standard/php_smart_str.h"
#ifdef PHP_RUNKIT_SANDBOX
#include "SAPI.h"
#include "php_main.h"
#include "php_runkit_sandbox.h"
#include "php_runkit_zval.h"
static zend_object_handlers php_runkit_sandbox_object_handlers;
static zend_class_entry *php_runkit_sandbox_class_entry;
#define PHP_RUNKIT_SANDBOX_BEGIN(objval) \
{ \
void *prior_context = tsrm_set_interpreter_context(objval->context); \
TSRMLS_FETCH();
#define PHP_RUNKIT_SANDBOX_ABORT(objval) \
{ \
tsrm_set_interpreter_context(prior_context); \
}
#define PHP_RUNKIT_SANDBOX_END(objval) \
PHP_RUNKIT_SANDBOX_ABORT(objval) \
if (objval->bailed_out_in_eval) { \
/* We're actually in bailout mode, but the child's bailout address had to resolve first */ \
zend_bailout(); \
} \
}
#define PHP_RUNKIT_SANDBOX_FETCHBOX(zval_p) (php_runkit_sandbox_object*)zend_objects_get_address(zval_p TSRMLS_CC)
int php_runkit_sandbox_array_deep_copy(RUNKIT_53_TSRMLS_ARG(zval **value), int num_args, va_list args, zend_hash_key *hash_key)
{
HashTable *target_hashtable = va_arg(args, HashTable*);
#if (RUNKIT_UNDER53)
TSRMLS_D = va_arg(args, void***);
#endif
zval *copyval;
MAKE_STD_ZVAL(copyval);
*copyval = **value;
PHP_SANDBOX_CROSS_SCOPE_ZVAL_COPY_CTOR(copyval);
if (hash_key->nKeyLength) {
#if PHP_MAJOR_VERSION >= 6
zend_u_hash_quick_update(target_hashtable, hash_key->type == HASH_KEY_IS_UNICODE ? IS_UNICODE : IS_STRING, hash_key->u.string, hash_key->nKeyLength, hash_key->h, ©val, sizeof(zval*), NULL);
#else
zend_hash_quick_update(target_hashtable, hash_key->arKey, hash_key->nKeyLength, hash_key->h, ©val, sizeof(zval*), NULL);
#endif
} else {
zend_hash_index_update(target_hashtable, hash_key->h, ©val, sizeof(zval*), NULL);
}
return ZEND_HASH_APPLY_KEEP;
}
/* ******************
* Runkit_Sandbox *
****************** */
static HashTable *php_runkit_sandbox_parse_multipath(const char *paths TSRMLS_DC) {
HashTable *ht;
int len = strlen(paths);
char *s, *colon, *pathcopy, tmppath[MAXPATHLEN] = {0};
if (!len) {
return NULL;
}
pathcopy = estrndup(paths, len);
ALLOC_HASHTABLE(ht);
zend_hash_init(ht, 4, NULL, NULL, 0);
for (s = pathcopy; (colon = strchr(s, ZEND_PATHS_SEPARATOR)); s = colon + 1) {
if (colon > s) {
*colon = 0;
VCWD_REALPATH(s, tmppath);
if (*tmppath) {
zend_hash_next_index_insert(ht, tmppath, strlen(tmppath) + 1, NULL);
} else {
/* s isn't real, leave it in the HashTable anyway
* to avoid making the old setting look like
* it had no values in it and thus allowing privilege elevation.
*/
zend_hash_next_index_insert(ht, s, (colon - s) + 1, NULL);
}
}
}
if (*s) {
VCWD_REALPATH(s, tmppath);
if (*tmppath) {
zend_hash_next_index_insert(ht, tmppath, strlen(tmppath) + 1, NULL);
} else {
/* See above */
zend_hash_next_index_insert(ht, s, strlen(s) + 1, NULL);
}
}
efree(pathcopy);
return ht;
}
static void php_runkit_sandbox_free_multipath(HashTable *ht TSRMLS_DC) {
if (ht) {
zend_hash_destroy(ht);
FREE_HASHTABLE(ht);
}
}
static char *php_runkit_sandbox_implode_stringht(HashTable *ht TSRMLS_DC) {
smart_str s = { 0 };
HashPosition pos;
char *str;
for(zend_hash_internal_pointer_reset_ex(ht, &pos);
SUCCESS == zend_hash_get_current_data_ex(ht, (void*)&str, &pos);
zend_hash_move_forward_ex(ht, &pos)) {
if (s.len) {
smart_str_appendc(&s, ZEND_PATHS_SEPARATOR);
}
smart_str_appends(&s, str);
}
smart_str_0(&s);
return s.c;
}
static char *php_runkit_sandbox_tighten_paths(HashTable *oldht, HashTable *newht TSRMLS_DC) {
HashPosition newpos;
char *newstr;
if (!oldht && !newht) {
return NULL;
}
if (!oldht) {
/* From nothing to something */
return php_runkit_sandbox_implode_stringht(newht TSRMLS_CC);
}
if (!newht) {
/* From something to nothing */
return NULL;
}
if (zend_hash_num_elements(oldht) == 0) {
/* Special edge case
* The parent's setting is ':' or similar.
* Despite looking similar to an empty setting,
* this actually has the opposite meaning.
* '' provides open access to the filesystem
* ':' provides access to none of it.
* THIS DISTINCTION MATTERS. :p
*/
return NULL;
}
for(zend_hash_internal_pointer_reset_ex(newht, &newpos);
SUCCESS == zend_hash_get_current_data_ex(newht, (void*)&newstr, &newpos);
zend_hash_move_forward_ex(newht, &newpos)) {
HashPosition oldpos;
char *oldstr;
int newstr_len = strlen(newstr);
for(zend_hash_internal_pointer_reset_ex(oldht, &oldpos);
SUCCESS == zend_hash_get_current_data_ex(oldht, (void*)&oldstr, &oldpos);
zend_hash_move_forward_ex(oldht, &oldpos)) {
int oldstr_len = strlen(oldstr);
if ((oldstr_len <= newstr_len) &&
!strncmp(oldstr, newstr, oldstr_len) &&
((oldstr_len == newstr_len) || (newstr[oldstr_len] == DEFAULT_SLASH))) {
goto newstr_ok;
}
}
/* Couldn't find an old path that we're constricting, so fail */
return NULL;
newstr_ok: ;
}
return php_runkit_sandbox_implode_stringht(newht TSRMLS_CC);
}
/* Special .ini options (normally PHP_INI_SYSTEM) which can be overridden within a sandbox in the direction of tighter security
*
* safe_mode = true
* safe_mode can only be turned on for a sandbox, not off. Doing so would tend to defeat safe_mode as applied to the calling script
* safe_mode_gid = false
* safe_mode_gid can only be turned off as it allows a partial bypass of safe_mode restrictions when on
* safe_mode_include_dir = /path/to/includables
* safe_mode_include_dir must be at or below the currently defined include_dir
* open_basedir = /path/to/basedir
* open_basedir must be at or below the currently defined basedir for the same reason that safe_mode can only be turned on
* allow_url_fopen = false
* allow_url_fopen may only be turned off for a sandbox, not on. Once again, don't castrate the existing restrictions
* allow_url_include = false
* allow_url_include may only be turned off for a sandbox, not on. Once again, don't castrate the existing restrictions
* disable_functions = coma_separated,list_of,additional_functions
* ADDITIONAL functions, on top of already disabled functions to disable
* disable_classes = coma_separated,list_of,additional_classes
* ADDITIONAL classes, on top of already disabled classes to disable
* runkit.superglobals = coma_separated,list_of,superglobals
* ADDITIONAL superglobals to define in the subinterpreter
* runkit.internal_override = false
* runkit.internal_override may be disabled (but not re-enabled) within sandboxes
*/
static inline void php_runkit_sandbox_ini_override(php_runkit_sandbox_object *objval, HashTable *options TSRMLS_DC)
{
zend_bool allow_url_fopen;
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION < 4) || (PHP_MAJOR_VERSION < 5)
zend_bool safe_mode, safe_mode_gid;
HashTable *safe_mode_include_dirs = NULL;
#endif
#ifdef ZEND_ENGINE_2_2
zend_bool allow_url_include;
#endif
HashTable *open_basedirs = NULL;
zval **tmpzval;
/* Collect up parent values */
tsrm_set_interpreter_context(objval->parent_context);
{
/* Check current settings in parent context */
TSRMLS_FETCH_FROM_CTX(objval->parent_context);
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION < 4) || (PHP_MAJOR_VERSION < 5)
safe_mode = PG(safe_mode);
safe_mode_gid = PG(safe_mode_gid);
if (PG(safe_mode_include_dir) && *PG(safe_mode_include_dir)) {
safe_mode_include_dirs = php_runkit_sandbox_parse_multipath(PG(safe_mode_include_dir) TSRMLS_CC);
}
#endif
if (PG(open_basedir) && *PG(open_basedir)) {
open_basedirs = php_runkit_sandbox_parse_multipath(PG(open_basedir) TSRMLS_CC);
}
allow_url_fopen = PG(allow_url_fopen);
#ifdef ZEND_ENGINE_2_2
allow_url_include = PG(allow_url_include);
#endif
}
tsrm_set_interpreter_context(objval->context);
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION < 4) || (PHP_MAJOR_VERSION < 5)
/* safe_mode only goes on */
if (!safe_mode &&
zend_hash_find(options, "safe_mode", sizeof("safe_mode"), (void*)&tmpzval) == SUCCESS) {
zval copyval = **tmpzval;
zval_copy_ctor(©val);
convert_to_boolean(©val);
if (Z_BVAL(copyval)) {
zend_alter_ini_entry("safe_mode", sizeof("safe_mode"), "1", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
}
}
/* safe_mode_gid only goes off */
if (safe_mode_gid &&
zend_hash_find(options, "safe_mode_gid", sizeof("safe_mode_gid"), (void*)&tmpzval) == SUCCESS) {
zval copyval = **tmpzval;
zval_copy_ctor(©val);
convert_to_boolean(©val);
if (!Z_BVAL(copyval)) {
zend_alter_ini_entry("safe_mode_gid", sizeof("safe_mode_gid"), "0", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
}
}
/* safe_mode_include_dir can go deeper, or be set to blank (which means nowhere is includable) */
if (zend_hash_find(options, "safe_mode_include_dir", sizeof("safe_mode_include_dir"), (void*)&tmpzval) == SUCCESS &&
Z_TYPE_PP(tmpzval) == IS_STRING) {
if (Z_STRLEN_PP(tmpzval) == 0) {
/* simplest case -- clearing safe_mode_include_dir -- maximum restriction */
zend_alter_ini_entry("safe_mode_include_dir", sizeof("safe_mode_include_dir"), NULL, 0, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
} else if (!safe_mode_include_dirs && safe_mode) {
/* 2nd simplest case -- Full security already with safe_mode preexisting -- leave it alone */
} else if (!safe_mode_include_dirs) {
/* 3rd simplest case -- include_dir not yet set, but safe_mode not on yet, assume we're turning on */
zend_alter_ini_entry("safe_mode_include_dir", sizeof("safe_mode_include_dir"), Z_STRVAL_PP(tmpzval), Z_STRLEN_PP(tmpzval), PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
} else {
/* Otherwise... */
HashTable *new_include_dirs = php_runkit_sandbox_parse_multipath(Z_STRVAL_PP(tmpzval) TSRMLS_CC);
int new_include_dir_len = 0;
char *new_include_dir = php_runkit_sandbox_tighten_paths(safe_mode_include_dirs, new_include_dirs TSRMLS_CC);
if (new_include_dir) {
/* Tightening up of existing security level */
zend_alter_ini_entry("safe_mode_include_dir", sizeof("safe_mode_include_dir"), new_include_dir, new_include_dir_len, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
efree(new_include_dir);
}
php_runkit_sandbox_free_multipath(new_include_dirs TSRMLS_CC);
}
}
#endif
/* open_basedir goes deeper only */
if (zend_hash_find(options, "open_basedir", sizeof("open_basedir"), (void*)&tmpzval) == SUCCESS &&
Z_TYPE_PP(tmpzval) == IS_STRING) {
if (!open_basedirs) {
/* simplest case -- no open basedir existed yet */
zend_alter_ini_entry("open_basedir", sizeof("open_basedir"), Z_STRVAL_PP(tmpzval), Z_STRLEN_PP(tmpzval), PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
goto child_open_basedir_set;
} else {
HashTable *new_open_basedirs = php_runkit_sandbox_parse_multipath(Z_STRVAL_PP(tmpzval) TSRMLS_CC); char *new_open_basedir = php_runkit_sandbox_tighten_paths(open_basedirs, new_open_basedirs TSRMLS_CC);
php_runkit_sandbox_free_multipath(new_open_basedirs TSRMLS_CC);
if (new_open_basedir) {
/* Tightening up of existing security level */
zend_alter_ini_entry("open_basedir", sizeof("open_basedir"), new_open_basedir, strlen(new_open_basedir), PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
efree(new_open_basedir);
goto child_open_basedir_set;
}
}
}
if (open_basedirs) {
/* Inherit parent's setting by default which may be PHP_INI_USER level setting */
char *parent_open_basedir = php_runkit_sandbox_implode_stringht(open_basedirs TSRMLS_CC);
zend_alter_ini_entry("open_basedir", sizeof("open_basedir"), parent_open_basedir, strlen(parent_open_basedir), PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
efree(parent_open_basedir);
}
child_open_basedir_set:
/* allow_url_fopen goes off only */
if (allow_url_fopen &&
zend_hash_find(options, "allow_url_fopen", sizeof("allow_url_fopen"), (void*)&tmpzval) == SUCCESS) {
zval copyval = **tmpzval;
zval_copy_ctor(©val);
convert_to_boolean(©val);
if (!Z_BVAL(copyval)) {
zend_alter_ini_entry("allow_url_fopen", sizeof("allow_url_fopen"), "0", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
}
}
/* Can only disable additional functions */
if (zend_hash_find(options, "disable_functions", sizeof("disable_functions"), (void*)&tmpzval) == SUCCESS &&
Z_TYPE_PP(tmpzval) == IS_STRING) {
/* NOTE: disable_functions doesn't prevent $obj->function_name, it only blocks code inside $obj->eval() statements
* This could be brought into consistency, but I actually think it's okay to leave those functions available to calling script
*/
/* This buffer needs to be around when the error message occurs since the underlying implementation in Zend expects it to be */
int disable_functions_len = Z_STRLEN_PP(tmpzval);
char *p, *s;
objval->disable_functions = estrndup(Z_STRVAL_PP(tmpzval), disable_functions_len);
s = objval->disable_functions;
while ((p = strchr(s, ','))) {
*p = '\0';
zend_disable_function(s, p - s TSRMLS_CC);
s = p + 1;
}
zend_disable_function(s, strlen(s) TSRMLS_CC);
}
/* Can only disable additional classes */
if (zend_hash_find(options, "disable_classes", sizeof("disable_classes"), (void*)&tmpzval) == SUCCESS &&
Z_TYPE_PP(tmpzval) == IS_STRING) {
/* This buffer needs to be around when the error message occurs since the underlying implementation in Zend expects it to be */
int disable_classes_len = Z_STRLEN_PP(tmpzval);
char *p, *s;
objval->disable_classes = estrndup(Z_STRVAL_PP(tmpzval), disable_classes_len);
s = objval->disable_classes;
while ((p = strchr(s, ','))) {
*p = '\0';
zend_disable_class(s, p - s TSRMLS_CC);
s = p + 1;
}
zend_disable_class(s, strlen(s) TSRMLS_CC);
}
/* Additional superglobals to define */
if (zend_hash_find(options, "runkit.superglobal", sizeof("runkit.superglobal"), (void*)&tmpzval) == SUCCESS &&
Z_TYPE_PP(tmpzval) == IS_STRING) {
char *p, *s = Z_STRVAL_PP(tmpzval);
int len;
while ((p = strchr(s, ','))) {
if (p - s) {
*p = '\0';
zend_register_auto_global(s, p - s,
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION >= 6)
0,
#endif
NULL TSRMLS_CC);
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION >= 6)
zend_activate_auto_globals(TSRMLS_C);
#else
zend_auto_global_disable_jit(s, p - s TSRMLS_CC);
#endif
*p = ',';
}
s = p + 1;
}
len = strlen(s);
zend_register_auto_global(s, len,
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION >= 6)
0,
#endif
NULL TSRMLS_CC);
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION < 4) || (PHP_MAJOR_VERSION < 5)
zend_auto_global_disable_jit(s, len TSRMLS_CC);
#endif
}
/* May only turn off */
if (zend_hash_find(options, "runkit.internal_override", sizeof("runkit.internal_override"), (void*)&tmpzval) == SUCCESS) {
zval copyval = **tmpzval;
zval_copy_ctor(©val);
convert_to_boolean(©val);
if (!Z_BVAL(copyval)) {
zend_alter_ini_entry("runkit.internal_override", sizeof("runkit.internal_override"), "0", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
}
}
#ifdef ZEND_ENGINE_2_2
/* May only turn off */
if (allow_url_include &&
(zend_hash_find(options, "allow_url_include", sizeof("allow_url_include"), (void*)&tmpzval) == SUCCESS) &&
!zend_is_true(*tmpzval)) {
zend_alter_ini_entry("allow_url_include", sizeof("allow_url_include"), "0", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
}
#endif
if (
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION < 4) || (PHP_MAJOR_VERSION < 5)
safe_mode_include_dirs ||
#endif
open_basedirs) {
tsrm_set_interpreter_context(objval->parent_context);
{
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION < 4) || (PHP_MAJOR_VERSION < 5)
php_runkit_sandbox_free_multipath(safe_mode_include_dirs TSRMLS_CC);
#endif
php_runkit_sandbox_free_multipath(open_basedirs TSRMLS_CC);
}
tsrm_set_interpreter_context(objval->context);
}
}
/* }}} */
/* {{{ proto void Runkit_Sandbox::__construct(array options)
* Options: see php_runkit_sandbox_ini_override()
*/
PHP_METHOD(Runkit_Sandbox,__construct)
{
php_runkit_sandbox_object *objval = PHP_RUNKIT_SANDBOX_FETCHBOX(this_ptr);
zval *options = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|a", &options) == FAILURE) {
RETURN_NULL();
}
objval->context = tsrm_new_interpreter_context();
objval->disable_functions = NULL;
objval->disable_classes = NULL;
objval->output_handler = NULL;
PHP_RUNKIT_SANDBOX_BEGIN(objval)
objval->parent_context = prior_context;
zend_alter_ini_entry("implicit_flush", sizeof("implicit_flush") , "1", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
zend_alter_ini_entry("max_execution_time", sizeof("max_execution_time") , "0", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
if (options) {
/* Override a select subset of .ini options for increased restriction in the sandbox */
php_runkit_sandbox_ini_override(objval, Z_ARRVAL_P(options) TSRMLS_CC);
}
SG(headers_sent) = 1;
SG(request_info).no_headers = 1;
SG(options) = SAPI_OPTION_NO_CHDIR;
RUNKIT_G(current_sandbox) = objval; /* Needs to be set before RINIT */
php_request_startup(TSRMLS_C);
RUNKIT_G(current_sandbox) = objval; /* But gets reset during RINIT -- Bad design on my part */
PG(during_request_startup) = 0;
PHP_RUNKIT_SANDBOX_END(objval)
/* Prime the sandbox to be played in */
objval->active = 1;
RETURN_TRUE;
}
/* }}} */
/* {{{ proto Runkit_Sandbox::__call(mixed function_name, array args)
Call User Function */
PHP_METHOD(Runkit_Sandbox,__call)
{
zval *func_name, *args, *retval = NULL;
php_runkit_sandbox_object *objval;
int bailed_out = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "za", &func_name, &args) == FAILURE) {
RETURN_NULL();
}
objval = PHP_RUNKIT_SANDBOX_FETCHBOX(this_ptr);
if (!objval->active) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Current sandbox is no longer active");
RETURN_NULL();
}
PHP_RUNKIT_SANDBOX_BEGIN(objval)
{
char *name = NULL;
zend_first_try {
if (!RUNKIT_IS_CALLABLE(func_name, IS_CALLABLE_CHECK_NO_ACCESS, &name)) {
php_error_docref1(NULL TSRMLS_CC, name, E_WARNING, "Function not defined");
if (name) {
efree(name);
}
PHP_RUNKIT_SANDBOX_ABORT(objval)
RETURN_FALSE;
}
php_runkit_sandbox_call_int(func_name, &name, &retval, args, return_value, prior_context TSRMLS_CC);
} zend_catch {
bailed_out = 1;
objval->active = 0;
} zend_end_try();
}
PHP_RUNKIT_SANDBOX_END(objval)
if (bailed_out) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed calling sandbox function");
RETURN_FALSE;
}
PHP_SANDBOX_CROSS_SCOPE_ZVAL_COPY_CTOR(return_value);
if (retval) {
PHP_RUNKIT_SANDBOX_BEGIN(objval)
(void)(TSRMLS_C);
zval_ptr_dtor(&retval);
PHP_RUNKIT_SANDBOX_END(objval)
}
}
/* }}} */
/* {{{ php_runkit_sandbox_include_or_eval
*/
static void php_runkit_sandbox_include_or_eval(INTERNAL_FUNCTION_PARAMETERS, int type, int once)
{
php_runkit_sandbox_object *objval;
zval *zcode;
int bailed_out = 0;
zval *retval = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zcode) == FAILURE) {
RETURN_FALSE;
}
convert_to_string(zcode);
objval = PHP_RUNKIT_SANDBOX_FETCHBOX(this_ptr);
if (!objval->active) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Current sandbox is no longer active");
RETURN_NULL();
}
RETVAL_NULL();
PHP_RUNKIT_SANDBOX_BEGIN(objval)
zend_first_try {
zend_op_array *op_array = NULL;
int already_included = 0;
op_array = php_runkit_sandbox_include_or_eval_int(return_value, zcode, type, once, &already_included TSRMLS_CC);
if (op_array) {
EG(return_value_ptr_ptr) = &retval;
EG(active_op_array) = op_array;
zend_execute(op_array TSRMLS_CC);
if (retval) {
*return_value = *retval;
} else {
RETVAL_TRUE;
}
destroy_op_array(op_array TSRMLS_CC);
efree(op_array);
} else if ((type != ZEND_INCLUDE) && !already_included) {
/* include can fail to parse peacefully,
* require and eval should die on failure
*/
objval->active = 0;
bailed_out = 1;
}
} zend_catch {
/* It's impossible to know what caused the failure, just deactive the sandbox now */
objval->active = 0;
bailed_out = 1;
} zend_end_try();
PHP_RUNKIT_SANDBOX_END(objval)
if (bailed_out) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Error executing sandbox code");
RETURN_FALSE;
}
PHP_SANDBOX_CROSS_SCOPE_ZVAL_COPY_CTOR(return_value);
/* Don't confuse the memory manager */
if (retval) {
PHP_RUNKIT_SANDBOX_BEGIN(objval)
(void)(TSRMLS_C);
zval_ptr_dtor(&retval);
PHP_RUNKIT_SANDBOX_END(objval)
}
}
/* }}} */
/* {{{ proto Runkit_Sandbox::eval(string phpcode)
Evaluate php code within the sandbox environment */
PHP_METHOD(Runkit_Sandbox,eval)
{
php_runkit_sandbox_include_or_eval(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_EVAL, 0);
}
/* }}} */
/* {{{ proto Runkit_Sandbox::include(string filename)
Evaluate php code from a file within the sandbox environment */
PHP_METHOD(Runkit_Sandbox,include)
{
php_runkit_sandbox_include_or_eval(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_INCLUDE, 0);
}
/* }}} */
/* {{{ proto Runkit_Sandbox::include_once(string filename)
Evaluate php code from a file within the sandbox environment */
PHP_METHOD(Runkit_Sandbox,include_once)
{
php_runkit_sandbox_include_or_eval(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_INCLUDE, 1);
}
/* }}} */
/* {{{ proto Runkit_Sandbox::require(string filename)
Evaluate php code from a file within the sandbox environment */
PHP_METHOD(Runkit_Sandbox,require)
{
php_runkit_sandbox_include_or_eval(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_REQUIRE, 0);
}
/* }}} */
/* {{{ proto Runkit_Sandbox::require_once(string filename)
Evaluate php code from a file within the sandbox environment */
PHP_METHOD(Runkit_Sandbox,require_once)
{
php_runkit_sandbox_include_or_eval(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_REQUIRE, 1);
}
/* }}} */
/* {{{ proto null Runkit_Sandbox::echo(mixed var[, mixed var[, ... ]])
Echo through the sandbox
The only thing which distinguished this from a non-sandboxed echo
is that content gets processed through the sandbox's output_handler (if present) */
PHP_METHOD(Runkit_Sandbox,echo)
{
php_runkit_sandbox_object *objval;
zval ***argv;
int i, argc = ZEND_NUM_ARGS();
argv = emalloc(sizeof(zval**) * argc);
if (zend_get_parameters_array_ex(argc, argv) == FAILURE) {
efree(argv);
/* Big problems... */
RETURN_NULL();
}
for(i = 0; i < argc; i++) {
/* Prepare for output */
convert_to_string(*(argv[i]));
}
objval = PHP_RUNKIT_SANDBOX_FETCHBOX(this_ptr);
if (!objval->active) {
efree(argv);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Current sandbox is no longer active");
RETURN_NULL();
}
PHP_RUNKIT_SANDBOX_BEGIN(objval)
zend_try {
for(i = 0; i < argc; i++) {
PHPWRITE(Z_STRVAL_PP(argv[i]),Z_STRLEN_PP(argv[i]));
}
} zend_catch {
objval->active = 0;
} zend_end_try();
PHP_RUNKIT_SANDBOX_END(objval)
efree(argv);
RETURN_NULL();
}
/* }}} */
/* {{{ proto bool Runkit_Sandbox::print(mixed var)
Echo through the sandbox
The only thing which distinguished this from a non-sandboxed echo
is that content gets processed through the sandbox's output_handler (if present) */
PHP_METHOD(Runkit_Sandbox,print)
{
php_runkit_sandbox_object *objval;
char *str;
int len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &str, &len) == FAILURE) {
RETURN_FALSE;
}
objval = PHP_RUNKIT_SANDBOX_FETCHBOX(this_ptr);
if (!objval->active) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Current sandbox is no longer active");
RETURN_NULL();
}
PHP_RUNKIT_SANDBOX_BEGIN(objval)
zend_try {
PHPWRITE(str,len);
} zend_catch {
objval->active = 0;
} zend_end_try();
PHP_RUNKIT_SANDBOX_END(objval)
RETURN_BOOL(len > 1 || (len == 1 && str[0] != '0'));
}
/* }}} */
/* {{{ proto void Runkit_Sandbox::die(mixed message)
MALIAS(exit)
Terminate a sandbox instance */
PHP_METHOD(Runkit_Sandbox,die)
{
php_runkit_sandbox_object *objval;
zval *message = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|z", &message) == FAILURE) {
RETURN_FALSE;
}
RETVAL_NULL();
if (message && Z_TYPE_P(message) != IS_LONG) {
convert_to_string(message);
}
objval = PHP_RUNKIT_SANDBOX_FETCHBOX(this_ptr);
if (!objval->active) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Current sandbox is no longer active");
return;
}
PHP_RUNKIT_SANDBOX_BEGIN(objval)
zend_try {
if (message) {
if (Z_TYPE_P(message) == IS_LONG) {
EG(exit_status) = Z_LVAL_P(message);
} else {
PHPWRITE(Z_STRVAL_P(message), Z_STRLEN_P(message));
}
}
zend_bailout();
} zend_catch {
/* goes without saying doesn't it? */
objval->active = 0;
} zend_end_try();
PHP_RUNKIT_SANDBOX_END(objval)
}
/* }}} */
/* *********************
* Property Handlers *
********************* */
/* {{{ php_runkit_sandbox_read_property
read_property handler */
static zval *php_runkit_sandbox_read_property(zval *object, zval *member, int type
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION > 6)
, const zend_literal *key
#endif
TSRMLS_DC)
{
php_runkit_sandbox_object *objval = PHP_RUNKIT_SANDBOX_FETCHBOX(object);
zval tmp_member;
zval retval;
int prop_found = 0;
if (!objval->active) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Current sandbox is no longer active");
return EG(uninitialized_zval_ptr);
}
PHP_RUNKIT_ZVAL_CONVERT_TO_STRING_IF_NEEDED(member, tmp_member);
PHP_RUNKIT_SANDBOX_BEGIN(objval)
zend_try {
zval **value;
if (zend_hash_find(&EG(symbol_table), Z_STRVAL_P(member), Z_STRLEN_P(member) + 1, (void*)&value) == SUCCESS) {
retval = **value;
prop_found = 1;
}
} zend_catch {
/* Almost certainly impossible... */
objval->active = 0;
} zend_end_try();
PHP_RUNKIT_SANDBOX_END(objval)
if (member == &tmp_member) {
zval_dtor(member);
}
return php_runkit_sandbox_return_property_value(prop_found, &retval TSRMLS_CC);
}
/* }}} */
/* {{{ php_runkit_sandbox_write_property
write_property handler */
static void php_runkit_sandbox_write_property(zval *object, zval *member, zval *value
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION > 6)
, const zend_literal *key
#endif
TSRMLS_DC)
{
php_runkit_sandbox_object *objval = PHP_RUNKIT_SANDBOX_FETCHBOX(object);
zval tmp_member;
if (!objval->active) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Current sandbox is no longer active");
return;
}
PHP_RUNKIT_ZVAL_CONVERT_TO_STRING_IF_NEEDED(member, tmp_member);
PHP_RUNKIT_SANDBOX_BEGIN(objval)
zend_try {
zval *copyval;
MAKE_STD_ZVAL(copyval);
*copyval = *value;
PHP_SANDBOX_CROSS_SCOPE_ZVAL_COPY_CTOR(copyval);
ZEND_SET_SYMBOL(&EG(symbol_table), Z_STRVAL_P(member), copyval);
} zend_catch {
/* An emalloc() could bailout */
objval->active = 0;
} zend_end_try();
PHP_RUNKIT_SANDBOX_END(objval)
if (member == &tmp_member) {
zval_dtor(member);
}
}
/* }}} */
/* {{{ php_runkit_sandbox_has_property
has_property handler */
static int php_runkit_sandbox_has_property(zval *object, zval *member, int has_set_exists
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION > 5)
, const zend_literal *key
#endif
TSRMLS_DC)
{
php_runkit_sandbox_object* objval = PHP_RUNKIT_SANDBOX_FETCHBOX(object);
zval member_copy;
int result = 0;
if (!objval) {
return 0;
}
/* It's okay to read the symbol table post bailout */
PHP_RUNKIT_ZVAL_CONVERT_TO_STRING_IF_NEEDED(member, member_copy);
PHP_RUNKIT_SANDBOX_BEGIN(objval)
php_runkit_sandbox_has_property_int(has_set_exists, member TSRMLS_CC);
PHP_RUNKIT_SANDBOX_END(objval)
if (member == &member_copy) {
zval_dtor(member);
}
return result;
}
/* }}} */
/* {{{ php_runkit_sandbox_unset_property
unset_property handler */
static void php_runkit_sandbox_unset_property(zval *object, zval *member
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION > 6)
, const zend_literal *key
#endif
TSRMLS_DC)
{
php_runkit_sandbox_object *objval;
zval member_copy;
objval = PHP_RUNKIT_SANDBOX_FETCHBOX(object);
if (!objval) {
return;
}
if (!objval->active) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Current sandbox is no longer active");
return;
}
PHP_RUNKIT_ZVAL_CONVERT_TO_STRING_IF_NEEDED(member, member_copy);
PHP_RUNKIT_SANDBOX_BEGIN(objval)
zend_hash_del(&EG(symbol_table), Z_STRVAL_P(member), Z_STRLEN_P(member) + 1);
PHP_RUNKIT_SANDBOX_END(objval)
if (member == &member_copy) {
zval_dtor(member);
}
}
/* }}} */
/* **************
* SAPI Wedge *
************** */
static sapi_module_struct php_runkit_sandbox_original_sapi;
/* {{{ php_runkit_sandbox_sapi_ub_write
* Wrap the caller's output handler with a mechanism for switching contexts
*/
static int php_runkit_sandbox_sapi_ub_write(const char *str, uint str_length TSRMLS_DC)
{
php_runkit_sandbox_object *objval = RUNKIT_G(current_sandbox);
int bytes_written;
if (!str_length) {
return 0;
}
if (!objval) {
/* Not in a sandbox -- Use genuine sapi.ub_write handler */
if (php_runkit_sandbox_original_sapi.ub_write) {
return php_runkit_sandbox_original_sapi.ub_write(str, str_length TSRMLS_CC);
} else {
/* Ignore data, no real SAPI handler to pass it to */
return str_length;
}
}
tsrm_set_interpreter_context(objval->parent_context);
{
zval **output_buffer[1], *bufcopy, *retval = NULL;
TSRMLS_FETCH();
if (!objval->output_handler ||
!RUNKIT_IS_CALLABLE(objval->output_handler, IS_CALLABLE_CHECK_NO_ACCESS, NULL)) {
/* No hander, or invalid handler, pass up the line... */
bytes_written = PHPWRITE(str, str_length);
tsrm_set_interpreter_context(objval->context);
return bytes_written;
}
MAKE_STD_ZVAL(bufcopy);
ZVAL_STRINGL(bufcopy, (char*)str, str_length, 1);
output_buffer[0] = &bufcopy;
if (call_user_function_ex(EG(function_table), NULL, objval->output_handler, &retval, 1, output_buffer, 0, NULL TSRMLS_CC) == SUCCESS) {
if (retval) {
if (Z_TYPE_P(retval) != IS_NULL) {
convert_to_string(retval);
PHPWRITE(Z_STRVAL_P(retval), Z_STRLEN_P(retval));