# This is the default configuration file for Snuffleupagus (https://snuffleupagus.rtfd.io).
# It contains "reasonable" defaults that won't break your websites,
# and a lot of commented directives that you can enable if you want to 
# have a better protection.

# Harden the PRNG
sp.harden_random.enable();

# Disabled XXE
sp.disable_xxe.enable();

# Global configuration variables
# sp.global.secret_key("YOU _DO_ NEED TO CHANGE THIS WITH SOME RANDOM CHARACTERS.");

# Globally activate strict mode
# https://secure.php.net/manual/en/functions.arguments.php#functions.arguments.type-declaration.strict
# sp.global_strict.enable();

# Prevent unserialize-related exploits
# sp.unserialize_hmac.enable();

# Only allow execution of read-only files. This is a low-hanging fruit that you should enable.
# sp.readonly_exec.enable();

# Php has a lot of wrappers, most of them aren't usually useful, you should 
# only enable the ones you're using.
# sp.wrappers_whitelist.list("file,php,phar");

# Prevent sloppy comparisons.
# sp.sloppy_comparison.enable();

# use SameSite on session cookie
# https://snuffleupagus.readthedocs.io/features.html#protection-against-cross-site-request-forgery
sp.cookie.name("PHPSESSID").samesite("lax");

# Harden the `chmod` function
sp.disable_function.function("chmod").param("mode").value_r("^[0-9]{2}[67]$").drop();

# Prevent various `mail`-related vulnerabilities
sp.disable_function.function("mail").param("additional_parameters").value_r("\\-").drop();

# Since it's now burned, me might as well mitigate it publicly
sp.disable_function.function("putenv").param("setting").value_r("LD_").drop()

# This is also burned:
# ini_set('open_basedir','..');chdir('..');…;chdir('..');ini_set('open_basedir','/');echo(file_get_contents('/etc/passwd'));
# Since we have no way of matching on two parameters at the same time, we're
# blocking calls to open_basedir altogether: nobody is using it via ini_set anyway.
# Moreover, there are non-public bypasses that are also using this vector ;)
sp.disable_function.function("ini_set").param("varname").value_r("open_basedir").drop()

##Prevent various `include`-related vulnerabilities
sp.disable_function.function("require_once").value_r("\.(inc|phtml|php)$").allow();
sp.disable_function.function("include_once").value_r("\.(inc|phtml|php)$").allow();
sp.disable_function.function("require").value_r("\.(inc|phtml|php)$").allow();
sp.disable_function.function("include").value_r("\.(inc|phtml|php)$").allow();
sp.disable_function.function("require_once").drop()
sp.disable_function.function("include_once").drop()
sp.disable_function.function("require").drop()
sp.disable_function.function("include").drop()

# Prevent `system`-related injections
sp.disable_function.function("system").param("command").value_r("[$|;&`\\n\\(\\)\\\\]").drop();
sp.disable_function.function("shell_exec").param("command").value_r("[$|;&`\\n\\(\\)\\\\]").drop();
sp.disable_function.function("exec").param("command").value_r("[$|;&`\\n\\(\\)\\\\]").drop();
sp.disable_function.function("proc_open").param("command").value_r("[$|;&`\\n\\(\\)\\\\]").drop();

# Prevent runtime modification of interesting things
sp.disable_function.function("ini_set").param("var_name").value("assert.active").drop();
sp.disable_function.function("ini_set").param("var_name").value("zend.assertions").drop();
sp.disable_function.function("ini_set").param("var_name").value("memory_limit").drop();
sp.disable_function.function("ini_set").param("var_name").value("include_path").drop();
sp.disable_function.function("ini_set").param("var_name").value("open_basedir").drop();

# Detect some backdoors via environnement recon
sp.disable_function.function("ini_get").param("var_name").value("allow_url_fopen").drop();
sp.disable_function.function("ini_get").param("var_name").value("open_basedir").drop();
sp.disable_function.function("ini_get").param("var_name").value_r("suhosin").drop();
sp.disable_function.function("function_exists").param("function_name").value("eval").drop();
sp.disable_function.function("function_exists").param("function_name").value("exec").drop();
sp.disable_function.function("function_exists").param("function_name").value("system").drop();
sp.disable_function.function("function_exists").param("function_name").value("shell_exec").drop();
sp.disable_function.function("function_exists").param("function_name").value("proc_open").drop();
sp.disable_function.function("function_exists").param("function_name").value("passthru").drop();
sp.disable_function.function("is_callable").param("var").value("eval").drop();
sp.disable_function.function("is_callable").param("var").value("exec").drop();
sp.disable_function.function("is_callable").param("var").value("system").drop();
sp.disable_function.function("is_callable").param("var").value("shell_exec").drop();
sp.disable_function.function("is_callable").param("var").value("proc_open").drop();
sp.disable_function.function("is_callable").param("var").value("passthru").drop();

# Commenting sqli related stuff to improve performance.
# TODO figure out why these functions can't be hooked at startup
# Ghetto sqli hardening
# sp.disable_function.function("mysql_query").param("query").value_r("/\\*").drop();
# sp.disable_function.function("mysql_query").param("query").value_r("--").drop();
# sp.disable_function.function("mysql_query").param("query").value_r("#").drop();
# sp.disable_function.function("mysql_query").param("query").value_r(";.*;").drop();
# sp.disable_function.function("mysql_query").param("query").value_r("benchmark").drop();
# sp.disable_function.function("mysql_query").param("query").value_r("sleep").drop();
# sp.disable_function.function("mysql_query").param("query").value_r("information_schema").drop();

# sp.disable_function.function("mysqli_query").param("query").value_r("/\\*").drop();
# sp.disable_function.function("mysqli_query").param("query").value_r("--").drop();
# sp.disable_function.function("mysqli_query").param("query").value_r("#").drop();
# sp.disable_function.function("mysqli_query").param("query").value_r(";.*;").drop();
# sp.disable_function.function("mysqli_query").param("query").value_r("benchmark").drop();
# sp.disable_function.function("mysqli_query").param("query").value_r("sleep").drop();
# sp.disable_function.function("mysqli_query").param("query").value_r("information_schema").drop();

# sp.disable_function.function("PDO::query").param("query").value_r("/\\*").drop();
# sp.disable_function.function("PDO::query").param("query").value_r("--").drop();
# sp.disable_function.function("PDO::query").param("query").value_r("#").drop();
# sp.disable_function.function("PDO::query").param("query").value_r(";.*;").drop();
# sp.disable_function.function("PDO::query").param("query").value_r("benchmark\\s*\\(").drop();
# sp.disable_function.function("PDO::query").param("query").value_r("sleep\\s*\\(").drop();
# sp.disable_function.function("PDO::query").param("query").value_r("information_schema").drop();

# Ghetto sqli detection
# sp.disable_function.function("mysql_query").ret("FALSE").drop();
# sp.disable_function.function("mysqli_query").ret("FALSE").drop();
# sp.disable_function.function("PDO::query").ret("FALSE").drop();

# Ensure that certificates are properly verified
sp.disable_function.function("curl_setopt").param("value").value("1").allow();
sp.disable_function.function("curl_setopt").param("value").value("2").allow();
# `81` is SSL_VERIFYHOST and `64` SSL_VERIFYPEER
sp.disable_function.function("curl_setopt").param("option").value("64").drop().alias("Please don't turn CURLOPT_SSL_VERIFYCLIENT off.");
sp.disable_function.function("curl_setopt").param("option").value("81").drop().alias("Please don't turn CURLOPT_SSL_VERIFYHOST off.");

#File upload
sp.disable_function.function("move_uploaded_file").param("destination").value_r("\\.ph").drop();
sp.disable_function.function("move_uploaded_file").param("destination").value_r("\\.ht").drop();