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||||||
|
[[package]]
|
||||||
|
name = "windows_x86_64_gnullvm"
|
||||||
|
version = "0.52.6"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "windows_x86_64_msvc"
|
||||||
|
version = "0.52.6"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
|
||||||
11
Cargo.toml
Normal file
11
Cargo.toml
Normal file
|
|
@ -0,0 +1,11 @@
|
||||||
|
[package]
|
||||||
|
name = "mesozoa"
|
||||||
|
version = "0.1.0"
|
||||||
|
edition = "2024"
|
||||||
|
|
||||||
|
[dependencies]
|
||||||
|
realm_io = { version = "0.5" }
|
||||||
|
realm_syscall = "0.1"
|
||||||
|
regex = { version = "1.11", default-features = false, features = ["perf", "std"] }
|
||||||
|
static_cell = { version = "2.1.0", features = ["nightly"] }
|
||||||
|
tokio = { version = "1", features = ["io-util", "macros", "rt", "rt-multi-thread", "time"] }
|
||||||
5
README.md
Normal file
5
README.md
Normal file
|
|
@ -0,0 +1,5 @@
|
||||||
|
Mesozoa
|
||||||
|
|
||||||
|
Why not Anubis? Because it provides no build instructions and only supports Docker.
|
||||||
|
|
||||||
|
Why not using Realm completely? Because the hook system is useless and only allows filtering.
|
||||||
9
rustfmt.toml
Normal file
9
rustfmt.toml
Normal file
|
|
@ -0,0 +1,9 @@
|
||||||
|
hard_tabs = true
|
||||||
|
newline_style = "Unix"
|
||||||
|
imports_granularity = "Crate"
|
||||||
|
|
||||||
|
unstable_features = true
|
||||||
|
format_code_in_doc_comments = true
|
||||||
|
format_macro_bodies = true
|
||||||
|
format_macro_matchers = true
|
||||||
|
format_strings = true
|
||||||
17
src/challenge.html
Normal file
17
src/challenge.html
Normal file
|
|
@ -0,0 +1,17 @@
|
||||||
|
<!doctype html>
|
||||||
|
<html lang="en">
|
||||||
|
<head>
|
||||||
|
<meta charset="utf-8"/>
|
||||||
|
<meta name="robots" content="noindex"/>
|
||||||
|
<title>Antispam working...</title>
|
||||||
|
</head>
|
||||||
|
<body>
|
||||||
|
<h1>Fighting crawlers</h1>
|
||||||
|
<script type="text/javascript">
|
||||||
|
/*setTimeout(function() {
|
||||||
|
document.cookie = "mesozoa=1234; max-age=3600";
|
||||||
|
window.location.reload();
|
||||||
|
}, 1000);*/
|
||||||
|
</script>
|
||||||
|
</body>
|
||||||
|
</html>
|
||||||
58
src/http.rs
Normal file
58
src/http.rs
Normal file
|
|
@ -0,0 +1,58 @@
|
||||||
|
/// Iterates lines of HTTP header and stops at end of header
|
||||||
|
pub struct HeaderLineIterator<'a> {
|
||||||
|
packet: &'a [u8],
|
||||||
|
start: usize,
|
||||||
|
cr: bool,
|
||||||
|
i: usize,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a> HeaderLineIterator<'a> {
|
||||||
|
pub fn new(packet: &'a [u8]) -> Self {
|
||||||
|
Self {
|
||||||
|
packet,
|
||||||
|
start: 0,
|
||||||
|
cr: false,
|
||||||
|
i: 0,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a> Iterator for HeaderLineIterator<'a> {
|
||||||
|
type Item = &'a [u8];
|
||||||
|
fn next(&mut self) -> Option<Self::Item> {
|
||||||
|
while self.i < self.packet.len() {
|
||||||
|
let c = self.packet[self.i];
|
||||||
|
if c == b'\r' {
|
||||||
|
self.cr = true;
|
||||||
|
} else if c == b'\n' && self.cr {
|
||||||
|
self.cr = false;
|
||||||
|
self.i += 1;
|
||||||
|
let start = self.start;
|
||||||
|
self.start = self.i;
|
||||||
|
return Some(&self.packet[start..self.i - 2]);
|
||||||
|
} else {
|
||||||
|
self.cr = false;
|
||||||
|
}
|
||||||
|
self.i += 1;
|
||||||
|
}
|
||||||
|
None
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn parse_cookies<'a>(line: &'a [u8]) -> Option<&'a [u8]> {
|
||||||
|
if line.get(0..7) != Some(b"Cookie:") {
|
||||||
|
return None;
|
||||||
|
}
|
||||||
|
let mut waiting_for_name = true;
|
||||||
|
let mut iter = line.iter().enumerate().skip(7);
|
||||||
|
while let Some((i, c)) = iter.next() {
|
||||||
|
if *c == b' ' {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
if waiting_for_name {
|
||||||
|
|
||||||
|
}
|
||||||
|
//iter.advance_by(5);
|
||||||
|
}
|
||||||
|
None
|
||||||
|
}
|
||||||
95
src/main.rs
Normal file
95
src/main.rs
Normal file
|
|
@ -0,0 +1,95 @@
|
||||||
|
mod http;
|
||||||
|
mod policy;
|
||||||
|
|
||||||
|
use http::HeaderLineIterator;
|
||||||
|
use policy::{CompiledPolicies, Policy};
|
||||||
|
|
||||||
|
use regex::bytes::Regex;
|
||||||
|
use std::{
|
||||||
|
io::{BufReader, Write},
|
||||||
|
net::SocketAddr,
|
||||||
|
time::Duration,
|
||||||
|
};
|
||||||
|
use tokio::{io::{ReadBuf, AsyncWriteExt}, time::timeout};
|
||||||
|
|
||||||
|
static CHALLENGE_BODY: &str = include_str!("challenge.html");
|
||||||
|
|
||||||
|
macro_rules! mk_static {
|
||||||
|
($t:ty, $val:expr) => {{
|
||||||
|
static STATIC_CELL: static_cell::StaticCell<$t> = static_cell::StaticCell::new();
|
||||||
|
#[deny(unused_attributes)]
|
||||||
|
let x = STATIC_CELL.uninit().write(($val));
|
||||||
|
x
|
||||||
|
}};
|
||||||
|
}
|
||||||
|
|
||||||
|
#[tokio::main]
|
||||||
|
async fn main() {
|
||||||
|
let listen_addr = "127.0.0.1:8000".parse().unwrap();
|
||||||
|
let policy_groups = &[&[Policy {
|
||||||
|
name: String::from("Block"),
|
||||||
|
filter: policy::Filter::FirstLineMatch(String::from("GET /block")),
|
||||||
|
action: policy::Action::Drop,
|
||||||
|
priority: 0,
|
||||||
|
}]];
|
||||||
|
|
||||||
|
let challenge_response = &*mk_static!(String, format!("HTTP/1.1 200\r\ncontent-type: text/html\r\ncontent-length: {}\r\n\r\n{}", CHALLENGE_BODY.len(), CHALLENGE_BODY));
|
||||||
|
|
||||||
|
let policy_groups: Vec<CompiledPolicies> = policy_groups.into_iter().map(|policies| CompiledPolicies::new(*policies)).collect();
|
||||||
|
|
||||||
|
let socket = realm_syscall::new_tcp_socket(&listen_addr).unwrap();
|
||||||
|
|
||||||
|
socket.set_reuse_address(true).ok();
|
||||||
|
|
||||||
|
socket.bind(&listen_addr.into()).unwrap();
|
||||||
|
socket.listen(1024).unwrap();
|
||||||
|
|
||||||
|
let listener = tokio::net::TcpListener::from_std(socket.into()).unwrap();
|
||||||
|
|
||||||
|
let cookie_regex = Regex::new(r"^Cookie: *(?:[^;=]+=[^;=]* *; *)*mesozoa *= *([0-9a-zA-Z]{4})").unwrap();
|
||||||
|
|
||||||
|
|
||||||
|
loop {
|
||||||
|
let Ok((mut client_stream, client_addr)) = listener.accept().await else {
|
||||||
|
continue;
|
||||||
|
};
|
||||||
|
//client_stream.set_nodelay(true).ok();
|
||||||
|
|
||||||
|
let cookie_regex = cookie_regex.clone();
|
||||||
|
tokio::spawn(async move {
|
||||||
|
let mut buf = [0u8; 1024];
|
||||||
|
let mut buf_reader = ReadBuf::new(&mut buf);
|
||||||
|
if let Err(_) = timeout(
|
||||||
|
Duration::from_millis(100),
|
||||||
|
std::future::poll_fn(|cx| client_stream.poll_peek(cx, &mut buf_reader)),
|
||||||
|
)
|
||||||
|
.await
|
||||||
|
{
|
||||||
|
println!("peek timeout");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
let mut header_line_iter = HeaderLineIterator::new(&buf);
|
||||||
|
let Some(first_line) = header_line_iter.next() else {
|
||||||
|
println!("Not HTTP, or too long line");
|
||||||
|
return;
|
||||||
|
};
|
||||||
|
// TODO matching
|
||||||
|
// for test we will challenge everything!
|
||||||
|
if let Some(captures) = header_line_iter.find_map(|line| cookie_regex.captures(line)) {
|
||||||
|
if let Some(cookie) = captures.get(1) {
|
||||||
|
let mut stdout = std::io::stdout();
|
||||||
|
stdout.write_all(cookie.as_bytes()).unwrap();
|
||||||
|
stdout.flush().unwrap();
|
||||||
|
println!("");
|
||||||
|
} else {
|
||||||
|
println!("cookie header, but no cookie")
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
println!("no cookie");
|
||||||
|
}
|
||||||
|
client_stream.writable().await.unwrap();
|
||||||
|
client_stream.write_all(challenge_response.as_bytes()).await.unwrap();
|
||||||
|
});
|
||||||
|
}
|
||||||
|
}
|
||||||
131
src/policy.rs
Normal file
131
src/policy.rs
Normal file
|
|
@ -0,0 +1,131 @@
|
||||||
|
use regex::{Regex, RegexSet};
|
||||||
|
|
||||||
|
#[derive(Clone, Debug)]
|
||||||
|
pub enum Action {
|
||||||
|
Allow,
|
||||||
|
Challenge,
|
||||||
|
Drop,
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Clone, Debug)]
|
||||||
|
pub enum Filter {
|
||||||
|
Bool(bool),
|
||||||
|
FirstLineMatch(String),
|
||||||
|
HeaderLineMatch(String),
|
||||||
|
And(Vec<Filter>),
|
||||||
|
Or(Vec<Filter>),
|
||||||
|
Not(Box<Filter>),
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Filter {
|
||||||
|
fn compile<'a>(
|
||||||
|
&'a self,
|
||||||
|
first_line_regexes: &mut Vec<&'a str>,
|
||||||
|
header_line_regexes: &mut Vec<&'a str>,
|
||||||
|
) -> CompiledFilter {
|
||||||
|
match self {
|
||||||
|
Filter::Bool(v) => CompiledFilter::Bool(*v),
|
||||||
|
Filter::And(filters) => CompiledFilter::And(
|
||||||
|
filters
|
||||||
|
.iter()
|
||||||
|
.map(|filter| filter.compile(first_line_regexes, header_line_regexes))
|
||||||
|
.collect(),
|
||||||
|
),
|
||||||
|
Filter::Or(filters) => CompiledFilter::Or(
|
||||||
|
filters
|
||||||
|
.iter()
|
||||||
|
.map(|filter| filter.compile(first_line_regexes, header_line_regexes))
|
||||||
|
.collect(),
|
||||||
|
),
|
||||||
|
Filter::Not(filter) => CompiledFilter::Not(Box::new(
|
||||||
|
filter.compile(first_line_regexes, header_line_regexes),
|
||||||
|
)),
|
||||||
|
Filter::FirstLineMatch(regex) => {
|
||||||
|
let filter = CompiledFilter::FirstLineMatch(first_line_regexes.len());
|
||||||
|
first_line_regexes.push(regex);
|
||||||
|
filter
|
||||||
|
}
|
||||||
|
Filter::HeaderLineMatch(regex) => {
|
||||||
|
let filter = CompiledFilter::HeaderLineMatch(header_line_regexes.len());
|
||||||
|
header_line_regexes.push(regex);
|
||||||
|
filter
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Clone, Debug)]
|
||||||
|
pub struct Policy {
|
||||||
|
pub name: String,
|
||||||
|
pub filter: Filter,
|
||||||
|
pub action: Action,
|
||||||
|
pub priority: i32,
|
||||||
|
}
|
||||||
|
|
||||||
|
pub enum CompiledFilter {
|
||||||
|
Bool(bool),
|
||||||
|
FirstLineMatch(usize),
|
||||||
|
HeaderLineMatch(usize),
|
||||||
|
And(Vec<CompiledFilter>),
|
||||||
|
Or(Vec<CompiledFilter>),
|
||||||
|
Not(Box<CompiledFilter>),
|
||||||
|
}
|
||||||
|
|
||||||
|
pub struct CompiledPolicy {
|
||||||
|
pub name: String,
|
||||||
|
pub filter: CompiledFilter,
|
||||||
|
pub priority: i32,
|
||||||
|
pub action: Action,
|
||||||
|
}
|
||||||
|
|
||||||
|
pub struct CompiledPolicies {
|
||||||
|
pub first_line_regex_set: Option<RegexSet>,
|
||||||
|
pub header_line_regex_set: Option<RegexSet>,
|
||||||
|
pub policies: Vec<CompiledPolicy>,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl CompiledPolicies {
|
||||||
|
pub fn new<'a>(policies: impl IntoIterator<Item = &'a Policy>) -> Self {
|
||||||
|
let mut first_line_regexes = Vec::new();
|
||||||
|
let mut header_line_regexes = Vec::new();
|
||||||
|
let mut compiled_policies = Vec::new();
|
||||||
|
|
||||||
|
for policy in policies {
|
||||||
|
let compiled_policy = CompiledPolicy {
|
||||||
|
name: policy.name.clone(),
|
||||||
|
filter: policy
|
||||||
|
.filter
|
||||||
|
.compile(&mut first_line_regexes, &mut header_line_regexes),
|
||||||
|
priority: policy.priority,
|
||||||
|
action: policy.action.clone(),
|
||||||
|
};
|
||||||
|
compiled_policies.push(compiled_policy);
|
||||||
|
}
|
||||||
|
|
||||||
|
CompiledPolicies {
|
||||||
|
first_line_regex_set: if first_line_regexes.is_empty() {None} else {Some(RegexSet::new(&first_line_regexes).unwrap())},
|
||||||
|
header_line_regex_set: if header_line_regexes.is_empty() {None} else {Some(RegexSet::new(&header_line_regexes).unwrap())},
|
||||||
|
policies: compiled_policies,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn evaluate<'a>(&self, mut header_lines: impl Iterator<Item=&'a [u8]>) -> Result<Option<&CompiledPolicy>, PolicyEvaluationError> {
|
||||||
|
let mut best_policy = None;
|
||||||
|
let mut best_priority = i32::MAX;
|
||||||
|
|
||||||
|
let first_line = header_lines.next().ok_or(PolicyEvaluationError::NoFirstLine)?;
|
||||||
|
|
||||||
|
if let Some(first_line_regex_set) = &self.first_line_regex_set {
|
||||||
|
//let matches = first_line_regex_set.matches(first_line);
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
Ok(best_policy)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug)]
|
||||||
|
pub enum PolicyEvaluationError {
|
||||||
|
/// First HTTP line is too long or absent
|
||||||
|
NoFirstLine,
|
||||||
|
}
|
||||||
Loading…
Add table
Add a link
Reference in a new issue