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@ -1,6 +1,6 @@
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use std::{
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net::IpAddr,
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sync::Arc,
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sync::{Arc, Mutex},
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time::{Duration, SystemTime},
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};
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@ -16,14 +16,13 @@ use rocket::{http::ContentType, response::Redirect, Route};
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use tokio::{
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fs::{create_dir_all, remove_file, symlink_metadata, File},
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io::{AsyncReadExt, AsyncWriteExt},
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net::lookup_host,
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};
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use html5gum::{Emitter, HtmlString, InfallibleTokenizer, Readable, StringReader, Tokenizer};
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use crate::{
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error::Error,
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util::{get_reqwest_client_builder, Cached},
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util::{get_reqwest_client_builder, Cached, CustomDnsResolver, CustomResolverError},
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CONFIG,
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};
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@ -49,48 +48,32 @@ static CLIENT: Lazy<Client> = Lazy::new(|| {
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let icon_download_timeout = Duration::from_secs(CONFIG.icon_download_timeout());
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let pool_idle_timeout = Duration::from_secs(10);
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// Reuse the client between requests
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let client = get_reqwest_client_builder()
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.cookie_provider(Arc::clone(&cookie_store))
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.timeout(icon_download_timeout)
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.pool_max_idle_per_host(5) // Configure the Hyper Pool to only have max 5 idle connections
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.pool_idle_timeout(pool_idle_timeout) // Configure the Hyper Pool to timeout after 10 seconds
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.hickory_dns(true)
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.default_headers(default_headers.clone());
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match client.build() {
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Ok(client) => client,
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Err(e) => {
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error!("Possible trust-dns error, trying with trust-dns disabled: '{e}'");
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get_reqwest_client_builder()
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.cookie_provider(cookie_store)
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.cookie_provider(Arc::clone(&cookie_store))
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.timeout(icon_download_timeout)
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.pool_max_idle_per_host(5) // Configure the Hyper Pool to only have max 5 idle connections
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.pool_idle_timeout(pool_idle_timeout) // Configure the Hyper Pool to timeout after 10 seconds
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.hickory_dns(false)
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.default_headers(default_headers)
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.dns_resolver(CustomDnsResolver::instance())
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.default_headers(default_headers.clone())
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.build()
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.expect("Failed to build client")
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}
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}
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});
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// Build Regex only once since this takes a lot of time.
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static ICON_SIZE_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"(?x)(\d+)\D*(\d+)").unwrap());
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// Special HashMap which holds the user defined Regex to speedup matching the regex.
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static ICON_BLACKLIST_REGEX: Lazy<dashmap::DashMap<String, Regex>> = Lazy::new(dashmap::DashMap::new);
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async fn icon_redirect(domain: &str, template: &str) -> Option<Redirect> {
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#[get("/<domain>/icon.png")]
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fn icon_external(domain: &str) -> Option<Redirect> {
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if !is_valid_domain(domain) {
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warn!("Invalid domain: {}", domain);
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return None;
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}
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if check_domain_blacklist_reason(domain).await.is_some() {
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if is_domain_blacklisted(domain) {
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return None;
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}
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let url = template.replace("{}", domain);
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let url = CONFIG._icon_service_url().replace("{}", domain);
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match CONFIG.icon_redirect_code() {
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301 => Some(Redirect::moved(url)), // legacy permanent redirect
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302 => Some(Redirect::found(url)), // legacy temporary redirect
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@ -103,11 +86,6 @@ async fn icon_redirect(domain: &str, template: &str) -> Option<Redirect> {
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}
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}
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#[get("/<domain>/icon.png")]
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async fn icon_external(domain: &str) -> Option<Redirect> {
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icon_redirect(domain, &CONFIG._icon_service_url()).await
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}
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#[get("/<domain>/icon.png")]
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async fn icon_internal(domain: &str) -> Cached<(ContentType, Vec<u8>)> {
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const FALLBACK_ICON: &[u8] = include_bytes!("../static/images/fallback-icon.png");
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@ -166,153 +144,28 @@ fn is_valid_domain(domain: &str) -> bool {
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true
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}
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/// TODO: This is extracted from IpAddr::is_global, which is unstable:
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/// https://doc.rust-lang.org/nightly/std/net/enum.IpAddr.html#method.is_global
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/// Remove once https://github.com/rust-lang/rust/issues/27709 is merged
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#[allow(clippy::nonminimal_bool)]
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#[cfg(not(feature = "unstable"))]
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fn is_global(ip: IpAddr) -> bool {
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match ip {
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IpAddr::V4(ip) => {
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// check if this address is 192.0.0.9 or 192.0.0.10. These addresses are the only two
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// globally routable addresses in the 192.0.0.0/24 range.
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if u32::from(ip) == 0xc0000009 || u32::from(ip) == 0xc000000a {
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return true;
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}
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!ip.is_private()
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&& !ip.is_loopback()
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&& !ip.is_link_local()
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&& !ip.is_broadcast()
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&& !ip.is_documentation()
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&& !(ip.octets()[0] == 100 && (ip.octets()[1] & 0b1100_0000 == 0b0100_0000))
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&& !(ip.octets()[0] == 192 && ip.octets()[1] == 0 && ip.octets()[2] == 0)
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&& !(ip.octets()[0] & 240 == 240 && !ip.is_broadcast())
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&& !(ip.octets()[0] == 198 && (ip.octets()[1] & 0xfe) == 18)
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// Make sure the address is not in 0.0.0.0/8
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&& ip.octets()[0] != 0
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}
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IpAddr::V6(ip) => {
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if ip.is_multicast() && ip.segments()[0] & 0x000f == 14 {
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true
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} else {
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!ip.is_multicast()
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&& !ip.is_loopback()
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&& !((ip.segments()[0] & 0xffc0) == 0xfe80)
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&& !((ip.segments()[0] & 0xfe00) == 0xfc00)
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&& !ip.is_unspecified()
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&& !((ip.segments()[0] == 0x2001) && (ip.segments()[1] == 0xdb8))
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}
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}
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}
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}
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pub fn is_domain_blacklisted(domain: &str) -> bool {
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let Some(config_blacklist) = CONFIG.icon_blacklist_regex() else {
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return false;
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};
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#[cfg(feature = "unstable")]
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fn is_global(ip: IpAddr) -> bool {
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ip.is_global()
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}
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// Compiled domain blacklist
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static COMPILED_BLACKLIST: Mutex<Option<(String, Regex)>> = Mutex::new(None);
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let mut guard = COMPILED_BLACKLIST.lock().unwrap();
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/// These are some tests to check that the implementations match
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/// The IPv4 can be all checked in 5 mins or so and they are correct as of nightly 2020-07-11
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/// The IPV6 can't be checked in a reasonable time, so we check about ten billion random ones, so far correct
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/// Note that the is_global implementation is subject to change as new IP RFCs are created
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///
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/// To run while showing progress output:
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/// cargo test --features sqlite,unstable -- --nocapture --ignored
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#[cfg(test)]
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#[cfg(feature = "unstable")]
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mod tests {
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use super::*;
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#[test]
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#[ignore]
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fn test_ipv4_global() {
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for a in 0..u8::MAX {
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println!("Iter: {}/255", a);
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for b in 0..u8::MAX {
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for c in 0..u8::MAX {
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for d in 0..u8::MAX {
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let ip = IpAddr::V4(std::net::Ipv4Addr::new(a, b, c, d));
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assert_eq!(ip.is_global(), is_global(ip))
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}
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}
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}
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}
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}
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#[test]
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#[ignore]
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fn test_ipv6_global() {
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use ring::rand::{SecureRandom, SystemRandom};
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let mut v = [0u8; 16];
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let rand = SystemRandom::new();
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for i in 0..1_000 {
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println!("Iter: {}/1_000", i);
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for _ in 0..10_000_000 {
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rand.fill(&mut v).expect("Error generating random values");
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let ip = IpAddr::V6(std::net::Ipv6Addr::new(
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(v[14] as u16) << 8 | v[15] as u16,
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(v[12] as u16) << 8 | v[13] as u16,
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(v[10] as u16) << 8 | v[11] as u16,
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(v[8] as u16) << 8 | v[9] as u16,
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(v[6] as u16) << 8 | v[7] as u16,
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(v[4] as u16) << 8 | v[5] as u16,
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(v[2] as u16) << 8 | v[3] as u16,
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(v[0] as u16) << 8 | v[1] as u16,
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));
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assert_eq!(ip.is_global(), is_global(ip))
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}
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}
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// If the stored regex is up to date, use it
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if let Some((value, regex)) = &*guard {
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if value == &config_blacklist {
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return regex.is_match(domain);
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}
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}
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#[derive(Clone)]
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enum DomainBlacklistReason {
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Regex,
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IP,
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}
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use cached::proc_macro::cached;
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#[cached(key = "String", convert = r#"{ domain.to_string() }"#, size = 16, time = 60)]
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async fn check_domain_blacklist_reason(domain: &str) -> Option<DomainBlacklistReason> {
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// First check the blacklist regex if there is a match.
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// This prevents the blocked domain(s) from being leaked via a DNS lookup.
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if let Some(blacklist) = CONFIG.icon_blacklist_regex() {
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// Use the pre-generate Regex stored in a Lazy HashMap if there's one, else generate it.
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let is_match = if let Some(regex) = ICON_BLACKLIST_REGEX.get(&blacklist) {
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regex.is_match(domain)
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} else {
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// Clear the current list if the previous key doesn't exists.
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// To prevent growing of the HashMap after someone has changed it via the admin interface.
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if ICON_BLACKLIST_REGEX.len() >= 1 {
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ICON_BLACKLIST_REGEX.clear();
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}
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// Generate the regex to store in too the Lazy Static HashMap.
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let blacklist_regex = Regex::new(&blacklist).unwrap();
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let is_match = blacklist_regex.is_match(domain);
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ICON_BLACKLIST_REGEX.insert(blacklist.clone(), blacklist_regex);
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// If we don't have a regex stored, or it's not up to date, recreate it
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let regex = Regex::new(&config_blacklist).unwrap();
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let is_match = regex.is_match(domain);
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*guard = Some((config_blacklist, regex));
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is_match
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};
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if is_match {
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debug!("Blacklisted domain: {} matched ICON_BLACKLIST_REGEX", domain);
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return Some(DomainBlacklistReason::Regex);
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}
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}
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if CONFIG.icon_blacklist_non_global_ips() {
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if let Ok(s) = lookup_host((domain, 0)).await {
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for addr in s {
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if !is_global(addr.ip()) {
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debug!("IP {} for domain '{}' is not a global IP!", addr.ip(), domain);
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return Some(DomainBlacklistReason::IP);
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}
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}
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}
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}
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None
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}
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async fn get_icon(domain: &str) -> Option<(Vec<u8>, String)> {
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@ -342,6 +195,13 @@ async fn get_icon(domain: &str) -> Option<(Vec<u8>, String)> {
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Some((icon.to_vec(), icon_type.unwrap_or("x-icon").to_string()))
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}
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Err(e) => {
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// If this error comes from the custom resolver, this means this is a blacklisted domain
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// or non global IP, don't save the miss file in this case to avoid leaking it
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if let Some(error) = CustomResolverError::downcast_ref(&e) {
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warn!("{error}");
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return None;
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}
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warn!("Unable to download icon: {:?}", e);
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let miss_indicator = path + ".miss";
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save_icon(&miss_indicator, &[]).await;
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@ -491,12 +351,12 @@ async fn get_icon_url(domain: &str) -> Result<IconUrlResult, Error> {
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let ssldomain = format!("https://{domain}");
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let httpdomain = format!("http://{domain}");
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// First check the domain as given during the request for both HTTPS and HTTP.
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let resp = match get_page(&ssldomain).or_else(|_| get_page(&httpdomain)).await {
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Ok(c) => Ok(c),
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Err(e) => {
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let mut sub_resp = Err(e);
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// First check the domain as given during the request for HTTPS.
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let resp = match get_page(&ssldomain).await {
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Err(e) if CustomResolverError::downcast_ref(&e).is_none() => {
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// If we get an error that is not caused by the blacklist, we retry with HTTP
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match get_page(&httpdomain).await {
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mut sub_resp @ Err(_) => {
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// When the domain is not an IP, and has more then one dot, remove all subdomains.
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let is_ip = domain.parse::<IpAddr>();
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if is_ip.is_err() && domain.matches('.').count() > 1 {
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@ -527,6 +387,12 @@ async fn get_icon_url(domain: &str) -> Result<IconUrlResult, Error> {
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}
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sub_resp
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}
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res => res,
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}
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}
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// If we get a result or a blacklist error, just continue
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res => res,
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};
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// Create the iconlist
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@ -573,21 +439,12 @@ async fn get_page(url: &str) -> Result<Response, Error> {
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}
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async fn get_page_with_referer(url: &str, referer: &str) -> Result<Response, Error> {
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match check_domain_blacklist_reason(url::Url::parse(url).unwrap().host_str().unwrap_or_default()).await {
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Some(DomainBlacklistReason::Regex) => warn!("Favicon '{}' is from a blacklisted domain!", url),
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Some(DomainBlacklistReason::IP) => warn!("Favicon '{}' is hosted on a non-global IP!", url),
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None => (),
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}
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let mut client = CLIENT.get(url);
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if !referer.is_empty() {
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client = client.header("Referer", referer)
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}
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match client.send().await {
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Ok(c) => c.error_for_status().map_err(Into::into),
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Err(e) => err_silent!(format!("{e}")),
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}
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Ok(client.send().await?.error_for_status()?)
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}
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/// Returns a Integer with the priority of the type of the icon which to prefer.
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@ -670,12 +527,6 @@ fn parse_sizes(sizes: &str) -> (u16, u16) {
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}
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async fn download_icon(domain: &str) -> Result<(Bytes, Option<&str>), Error> {
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match check_domain_blacklist_reason(domain).await {
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Some(DomainBlacklistReason::Regex) => err_silent!("Domain is blacklisted", domain),
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Some(DomainBlacklistReason::IP) => err_silent!("Host resolves to a non-global IP", domain),
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None => (),
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}
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let icon_result = get_icon_url(domain).await?;
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let mut buffer = Bytes::new();
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@ -711,8 +562,8 @@ async fn download_icon(domain: &str) -> Result<(Bytes, Option<&str>), Error> {
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_ => debug!("Extracted icon from data:image uri is invalid"),
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};
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} else {
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match get_page_with_referer(&icon.href, &icon_result.referer).await {
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Ok(res) => {
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let res = get_page_with_referer(&icon.href, &icon_result.referer).await?;
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buffer = stream_to_bytes_limit(res, 5120 * 1024).await?; // 5120KB/5MB for each icon max (Same as icons.bitwarden.net)
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// Check if the icon type is allowed, else try an icon from the list.
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@ -725,9 +576,6 @@ async fn download_icon(domain: &str) -> Result<(Bytes, Option<&str>), Error> {
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|
info!("Downloaded icon from {}", icon.href);
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|
break;
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}
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|
Err(e) => debug!("{:?}", e),
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|
};
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}
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}
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if buffer.is_empty() {
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Daniel García
7 months ago
committed by
GitHub