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feat: use a proper path sanitization function for permitted paths

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This commit is contained in:
David Bailey 2023-12-20 18:50:07 +01:00
parent b552562f31
commit eb87a78625
2 changed files with 26 additions and 6 deletions
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30
www/mysql_adapter.php
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@ -29,6 +29,21 @@ class MySQLAdapter {
}
}
function _sanitize_path($post_path) {
$post_path = chop($post_path, '/');
if($post_path == "") {
return "";
}
if(!preg_match('/^(?:\/[\w-]+)+(?:\.[\w-]+)*$/', $post_path)) {
echo "Post path match against " . $post_path . " failed!";
die();
}
return $post_path;
}
function _exec($qery, $argtypes, ...$args) {
$stmt = $this->raw->prepare($qery);
$stmt->bind_param($argtypes, ...$args);
@ -53,7 +68,7 @@ class MySQLAdapter {
}
function bump_post($post_path, $post_metadata = [], $create_dirs = true) {
$post_path = chop($post_path, '/');
$post_path = $this->_sanitize_path($post_path);
$path_depth = substr_count($post_path, "/");
if($create_dirs) {
@ -89,7 +104,7 @@ class MySQLAdapter {
}
function update_or_create_post($post_path, $post_metadata, $post_content) {
$post_path = chop($post_path, '/');
$post_path = $this->_sanitize_path($post_path);
$path_depth = substr_count($post_path, "/");
$this->make_post_directory(dirname($post_path));
@ -109,6 +124,7 @@ class MySQLAdapter {
}
function get_settings_for_path($post_path) {
$post_path = $this->_sanitize_path($post_path);
$qry = "
WITH RECURSIVE settings_data (post_path, post_depth, json_settings) AS (
@ -146,15 +162,19 @@ class MySQLAdapter {
}
function get_post_by_path($post_path,
$with_subposts = true, $with_settings = true) {
$with_subposts = false, $with_settings = true) {
$qry = "SELECT * FROM posts WHERE post_path = ?";
$post_path = chop($post_path, '/');
$post_path = $this->_sanitize_path($post_path);
$post_data = $this->_exec($qry, "s", $post_path)->fetch_assoc();
$post_data = $this->_normalize_post_data($post_data);
$post_data['post_path'] = $post_path;
if(!$post_data['found']) {
return $post_data;
}
if($with_subposts) {
$post_data['subposts'] = $this->get_subposts_by_path($post_path);
@ -169,7 +189,7 @@ class MySQLAdapter {
function get_subposts_by_path($path) {
global $sql;
$path = chop($path, '/');
$path = $this->_sanitize_path($path);
$path_depth = substr_count($path, "/");

2
www/post_adapter.php
View file

@ -64,7 +64,7 @@ class PostHandler extends MySQLAdapter {
function save_markdown_post($post_path, $post_data) {
$frontmatter_post = YamlFrontMatter::parse($post_data);
$post_path = chop($post_path, '/');
$post_path = $this->_sanitize_path($post_path);
$post_content = $frontmatter_post->body();
$post_metadata = $frontmatter_post->matter();