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#include "php_snuffleupagus.h"
#include "ext/session/php_session.h"
ZEND_DECLARE_MODULE_GLOBALS(snuffleupagus);
#if ( HAVE_PHP_SESSION && !defined(COMPILE_DL_SESSION) )
#ifdef ZTS
static ts_rsrc_id session_globals_id = 0;
#define SESSION_G(v) ZEND_TSRMG(session_globals_id, php_ps_globals *, v)
#ifdef COMPILE_DL_SESSION
ZEND_TSRMLS_CACHE_EXTERN();
#endif
#else
static php_ps_globals *session_globals = NULL;
#define SESSION_G(v) (ps_globals.v)
#endif
static ps_module *s_module;
#if PHP_VERSION_ID < 70300
static ps_module *s_original_mod;
#else
static const ps_module *s_original_mod;
#endif
static int (*old_s_read)(PS_READ_ARGS);
static int (*old_s_write)(PS_WRITE_ARGS);
static int (*previous_sessionRINIT)(INIT_FUNC_ARGS) = NULL;
static ZEND_INI_MH((*old_OnUpdateSaveHandler)) = NULL;
static int sp_hook_s_read(PS_READ_ARGS) {
int r = old_s_read(mod_data, key, val, maxlifetime);
const sp_config_session *config_session =
SNUFFLEUPAGUS_G(config).config_session;
if ((NULL == val) || (NULL == *val) || (0 == ZSTR_LEN(*val))) {
return r;
}
if (r == SUCCESS && config_session->encrypt) {
zend_string *orig_val = *val;
zval val_zval;
ZVAL_PSTRINGL(&val_zval, ZSTR_VAL(*val), ZSTR_LEN(*val));
int ret = decrypt_zval(&val_zval, config_session->simulation, NULL);
if (ZEND_HASH_APPLY_KEEP != ret) {
zend_bailout();
}
*val = zend_string_dup(val_zval.value.str, 0);
zend_string_release(orig_val);
}
return r;
}
static int sp_hook_s_write(PS_WRITE_ARGS) {
if (ZSTR_LEN(val) > 0 && SNUFFLEUPAGUS_G(config).config_session->encrypt) {
zend_string *new_val = encrypt_zval(val);
return old_s_write(mod_data, key, new_val, maxlifetime);
}
return old_s_write(mod_data, key, val, maxlifetime);
}
static void sp_hook_session_module() {
#if PHP_VERSION_ID < 70300
ps_module *old_mod = SESSION_G(mod);
#else
const ps_module *old_mod = SESSION_G(mod);
#endif
ps_module *mod;
if (old_mod == NULL || s_module == old_mod) {
return; // LCOV_EXCL_LINE
}
if (s_module == NULL) {
s_module = mod = malloc(sizeof(ps_module));
if (mod == NULL) {
return; // LCOV_EXCL_LINE
}
}
s_original_mod = old_mod;
mod = s_module;
memcpy(mod, old_mod, sizeof(ps_module));
old_s_read = mod->s_read;
mod->s_read = sp_hook_s_read;
old_s_write = mod->s_write;
mod->s_write = sp_hook_s_write;
SESSION_G(mod) = mod;
}
static PHP_INI_MH(sp_OnUpdateSaveHandler) {
#if PHP_VERSION_ID < 70100
/* PHP7.0 doesn't handle well recusively set session handlers */
if (stage == PHP_INI_STAGE_RUNTIME &&
SESSION_G(session_status) == php_session_none && s_original_mod &&
zend_string_equals_literal(new_value, "user") == 0 &&
strcmp(((ps_module *)s_original_mod)->s_name, "user") == 0) {
return SUCCESS;
}
#endif
SESSION_G(mod) = s_original_mod;
int r = old_OnUpdateSaveHandler(entry, new_value, mh_arg1, mh_arg2, mh_arg3,
stage);
sp_hook_session_module();
return r;
}
static int sp_hook_session_RINIT(INIT_FUNC_ARGS) {
if (SESSION_G(mod) == NULL) {
zend_ini_entry *ini_entry;
if ((ini_entry = zend_hash_str_find_ptr(
EG(ini_directives), ZEND_STRL("session.save_handler")))) {
if (ini_entry->value) {
sp_OnUpdateSaveHandler(NULL, ini_entry->value, NULL, NULL, NULL, 0);
}
}
}
return previous_sessionRINIT(INIT_FUNC_ARGS_PASSTHRU);
}
void hook_session() {
zend_module_entry *module;
if ((module = zend_hash_str_find_ptr(&module_registry,
ZEND_STRL("session"))) == NULL) {
return; // LCOV_EXCL_LINE
}
#ifdef ZTS
if (session_globals_id == 0) {
session_globals_id = *module->globals_id_ptr;
}
#else
if (session_globals == NULL) {
session_globals = module->globals_ptr;
}
#endif
if (old_OnUpdateSaveHandler != NULL) {
return; // LCOV_EXCL_LINE
}
previous_sessionRINIT = module->request_startup_func;
module->request_startup_func = sp_hook_session_RINIT;
zend_ini_entry *ini_entry;
if ((ini_entry = zend_hash_str_find_ptr(
EG(ini_directives), ZEND_STRL("session.save_handler"))) != NULL) {
old_OnUpdateSaveHandler = ini_entry->on_modify;
ini_entry->on_modify = sp_OnUpdateSaveHandler;
}
s_module = NULL;
sp_hook_session_module();
}
#else
void hook_session() { }
#endif // HAVE_PHP_SESSION && !defined(COMPILE_DL_SESSION)
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