forked from zenovich/runkit
/
runkit_sandbox.c
2014 lines (1712 loc) · 58.9 KB
/
runkit_sandbox.c
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2006 The PHP Group, (c) 2008-2012 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 |
| license@php.net 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"
#ifdef PHP_RUNKIT_SANDBOX
#include "SAPI.h"
#include "php_main.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 *
****************** */
/* 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
* 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
*/
inline void php_runkit_sandbox_ini_override(php_runkit_sandbox_object *objval, HashTable *options TSRMLS_DC)
{
zend_bool allow_url_fopen;
char open_basedir[MAXPATHLEN] = {0};
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION < 4) || (PHP_MAJOR_VERSION < 5)
zend_bool safe_mode, safe_mode_gid;
char safe_mode_include_dir[MAXPATHLEN] = {0};
#endif
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(open_basedir) && *PG(open_basedir)) {
VCWD_REALPATH(PG(open_basedir), open_basedir);
}
if (PG(safe_mode_include_dir) && *PG(safe_mode_include_dir)) {
VCWD_REALPATH(PG(safe_mode_include_dir), safe_mode_include_dir);
}
#endif
allow_url_fopen = PG(allow_url_fopen);
}
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_dir && safe_mode) {
/* 2nd simplest case -- Full security already with safe_mode preexisting -- leave it alone */
} else if (!*safe_mode_include_dir) {
/* 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... */
int safe_mode_include_dir_len = strlen(safe_mode_include_dir);
char new_include_dir[MAXPATHLEN];
int new_include_dir_len;
VCWD_REALPATH(Z_STRVAL_PP(tmpzval), new_include_dir);
new_include_dir_len = strlen(new_include_dir);
if ((new_include_dir_len > safe_mode_include_dir_len) &&
(strncmp(safe_mode_include_dir, new_include_dir, safe_mode_include_dir_len) == 0) &&
(new_include_dir[safe_mode_include_dir_len] == '/')) {
/* 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);
}
}
}
#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) {
char new_basedir[MAXPATHLEN];
int open_basedir_len = strlen(open_basedir);
int new_basedir_len;
VCWD_REALPATH(Z_STRVAL_PP(tmpzval), new_basedir);
new_basedir_len = strlen(new_basedir);
if (open_basedir_len == 0) {
/* simplest case -- no open basedir existed yet */
zend_alter_ini_entry("open_basedir", sizeof("open_basedir"), new_basedir, new_basedir_len, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
} else if ((new_basedir_len > open_basedir_len) &&
(strncmp(open_basedir, new_basedir, open_basedir_len) == 0) &&
(new_basedir[open_basedir_len] == '/')) {
/* Tightening up of existing security level */
zend_alter_ini_entry("open_basedir", sizeof("open_basedir"), new_basedir, new_basedir_len, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
}
}
/* 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);
}
}
}
/* }}} */
/* {{{ 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;
}
/* }}} */
#if RUNKIT_ABOVE53
/* {{{ php_runkit_zend_object_store_get_obj */
static zend_object_store_bucket *php_runkit_zend_object_store_get_obj(const zval *zobject TSRMLS_DC)
{
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
return &EG(objects_store).object_buckets[handle];
}
/* }}} */
#endif
/* {{{ 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, argc;
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();
}
argc = zend_hash_num_elements(Z_ARRVAL_P(args));
PHP_RUNKIT_SANDBOX_BEGIN(objval)
{
zval ***sandbox_args;
char *name = NULL;
int i;
zend_first_try {
HashPosition pos;
zval **tmpzval;
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;
}
sandbox_args = safe_emalloc(sizeof(zval**), argc, 0);
for(zend_hash_internal_pointer_reset_ex(Z_ARRVAL_P(args), &pos), i = 0;
(zend_hash_get_current_data_ex(Z_ARRVAL_P(args), (void**)&tmpzval, &pos) == SUCCESS) && (i < argc);
zend_hash_move_forward_ex(Z_ARRVAL_P(args), &pos), i++) {
sandbox_args[i] = emalloc(sizeof(zval*));
MAKE_STD_ZVAL(*sandbox_args[i]);
**sandbox_args[i] = **tmpzval;
#if RUNKIT_ABOVE53
if (Z_TYPE_P(*sandbox_args[i]) == IS_OBJECT && zend_get_class_entry(*sandbox_args[i], prior_context) == zend_ce_closure) {
zend_closure *closure;
zend_object_store_bucket *bucket;
bucket = php_runkit_zend_object_store_get_obj(*sandbox_args[i], prior_context);
closure = (zend_closure *) bucket->bucket.obj.object;
(*sandbox_args[i])->value.obj.handle = zend_objects_store_put(closure, NULL, NULL, bucket->bucket.obj.clone TSRMLS_CC);
} else
#endif
PHP_SANDBOX_CROSS_SCOPE_ZVAL_COPY_CTOR(*sandbox_args[i]);
}
/* Shouldn't be necessary */
argc = i;
/* Note: If this function is disabled by disable_functions or disable_classes,
* The user will get a confusing error message about (null)() being disabled for security reasons on line 0
* This will be fixable with a properly set EG(function_state_ptr)....just not yet
*/
if (call_user_function_ex(EG(function_table), NULL, func_name, &retval, argc, sandbox_args, 0, NULL TSRMLS_CC) == SUCCESS) {
if (retval) {
*return_value = *retval;
} else {
RETVAL_TRUE;
}
} else {
php_error_docref1(NULL TSRMLS_CC, name, E_WARNING, "Unable to call function");
RETVAL_FALSE;
}
if (name) {
efree(name);
}
for(i = 0; i < argc; i++) {
#if RUNKIT_ABOVE53
if (Z_TYPE_P(*sandbox_args[i]) == IS_OBJECT && zend_get_class_entry(*sandbox_args[i] TSRMLS_CC) == zend_ce_closure) {
zend_object_store_bucket *bucket = php_runkit_zend_object_store_get_obj(*sandbox_args[i] TSRMLS_CC);
zend_objects_store_del_ref(*sandbox_args[i] TSRMLS_CC);
zval_ptr_dtor(sandbox_args[i]);
bucket->bucket.obj.object = NULL;
}
#endif
zval_ptr_dtor(sandbox_args[i]);
efree(sandbox_args[i]);
}
efree(sandbox_args);
} 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;
if (type == ZEND_EVAL) {
/* eval() */
char *eval_desc = zend_make_compiled_string_description("Runkit_Sandbox Eval Code" TSRMLS_CC);
op_array = compile_string(zcode, eval_desc TSRMLS_CC);
efree(eval_desc);
} else if (!once) {
/* include() & requre() */
op_array = compile_filename(type, zcode TSRMLS_CC);
} else {
/* include_once() & require_once() */
int dummy = 1;
zend_file_handle file_handle;
if (SUCCESS == zend_stream_open(Z_STRVAL_P(zcode), &file_handle TSRMLS_CC)) {
if (!file_handle.opened_path) {
file_handle.opened_path = estrndup(Z_STRVAL_P(zcode), Z_STRLEN_P(zcode));
}
if (zend_hash_add(&EG(included_files), file_handle.opened_path, strlen(file_handle.opened_path)+1, (void *)&dummy, sizeof(int), NULL)==SUCCESS) {
op_array = zend_compile_file(&file_handle, type TSRMLS_CC);
zend_destroy_file_handle(&file_handle TSRMLS_CC);
} else {
RUNKIT_FILE_HANDLE_DTOR(&file_handle);
RETVAL_TRUE;
already_included = 1;
}
}
}
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();
if (zend_get_parameters_array_ex(argc, &argv) == FAILURE) {
/* 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) {
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_P(argv[i]),Z_STRLEN_P(argv[i]));
}
} zend_catch {
objval->active = 0;
} zend_end_try();
PHP_RUNKIT_SANDBOX_END(objval)
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 = NULL;
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);
}
if (Z_TYPE_P(member) != IS_STRING) {
ALLOC_ZVAL(tmp_member);
*tmp_member = *member;
INIT_PZVAL(tmp_member);
zval_copy_ctor(tmp_member);
convert_to_string(tmp_member);
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 (tmp_member) {
zval_ptr_dtor(&tmp_member);
}
if (prop_found) {
zval *return_value;
ALLOC_ZVAL(return_value);
*return_value = retval;
/* ZE expects refcount == 0 for unowned values */
INIT_PZVAL(return_value);
PHP_SANDBOX_CROSS_SCOPE_ZVAL_COPY_CTOR(return_value);
return_value->RUNKIT_REFCOUNT--;
return return_value;
} else {
return EG(uninitialized_zval_ptr);
}
}
/* }}} */
/* {{{ 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 = NULL;
if (!objval->active) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Current sandbox is no longer active");
return;
}
if (Z_TYPE_P(member) != IS_STRING) {
ALLOC_ZVAL(tmp_member);
*tmp_member = *member;
INIT_PZVAL(tmp_member);
zval_copy_ctor(tmp_member);
convert_to_string(tmp_member);
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 (tmp_member) {
zval_ptr_dtor(&tmp_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 > 6)
, const zend_literal *key
#endif
TSRMLS_DC)
{
php_runkit_sandbox_object* objval;
zval member_copy;
int result = 0;
#if PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION < 1
/* Map PHP 5.0 has_property flag to PHP 5.1+ flag */
has_set_exists = (has_set_exists == 0) ? 2 : 1;
#endif
objval = PHP_RUNKIT_SANDBOX_FETCHBOX(object);
if (!objval) {
return 0;
}
/* It's okay to read the symbol table post bailout */
if (Z_TYPE_P(member) != IS_STRING) {
member_copy = *member;
member = &member_copy;
zval_copy_ctor(member);
member->RUNKIT_REFCOUNT = 1;
convert_to_string(member);
}
PHP_RUNKIT_SANDBOX_BEGIN(objval)
{
zval **tmpzval;
if (zend_hash_find(&EG(symbol_table), Z_STRVAL_P(member), Z_STRLEN_P(member) + 1, (void**)&tmpzval) == SUCCESS) {
switch (has_set_exists) {
case 0:
result = (Z_TYPE_PP(tmpzval) != IS_NULL);
break;
case 1:
switch (Z_TYPE_PP(tmpzval)) {
case IS_BOOL: case IS_LONG: case IS_RESOURCE:
result = (Z_LVAL_PP(tmpzval) != 0);
break;
case IS_DOUBLE:
result = (Z_DVAL_PP(tmpzval) != 0);
break;
case IS_STRING:
result = (Z_STRLEN_PP(tmpzval) > 1 || (Z_STRLEN_PP(tmpzval) == 1 && Z_STRVAL_PP(tmpzval)[0] != '0'));
break;
case IS_ARRAY:
result = zend_hash_num_elements(Z_ARRVAL_PP(tmpzval)) > 0;
break;
case IS_OBJECT:
/* TODO: Use ZE2 logic for this rather than ZE1 logic */
result = zend_hash_num_elements(Z_OBJPROP_PP(tmpzval)) > 0;
break;
case IS_NULL:
default:
result = 0;
}
break;
case 2:
result = 1;
break;
}
} else {
result = 0;
}
}
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;
}
if (Z_TYPE_P(member) != IS_STRING) {
member_copy = *member;
member = &member_copy;
zval_copy_ctor(member);
member->RUNKIT_REFCOUNT = 1;
convert_to_string(member);
}
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... */