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Merge branch 'tls-name' into 'master'

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Validate TLS certificates according to Matrix spec

See merge request famedly/conduit!60
This commit is contained in:
Timo Kösters 2021-04-23 05:22:07 +00:00
commit 8c72909bb8
5 changed files with 221 additions and 198 deletions
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2
CROSS_COMPILE.md
View file

@ -6,6 +6,6 @@ $ sudo usermod -aG docker $USER
$ exec sudo su -l $USER
$ sudo systemctl start docker
$ cargo install cross
$ cross build --release --features tls_vendored --target armv7-unknown-linux-musleabihf
$ cross build --release --target armv7-unknown-linux-musleabihf
```
The cross-compiled binary is at target/armv7-unknown-linux-musleabihf/release/conduit

151
Cargo.lock generated
View file

@ -198,6 +198,8 @@ dependencies = [
"rocket",
"ruma",
"rust-argon2",
"rustls",
"rustls-native-certs",
"serde",
"serde_json",
"serde_yaml",
@ -209,6 +211,7 @@ dependencies = [
"tracing-opentelemetry",
"tracing-subscriber",
"trust-dns-resolver",
"webpki",
]
[[package]]
@ -420,21 +423,6 @@ version = "1.0.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
[[package]]
name = "foreign-types"
version = "0.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
dependencies = [
"foreign-types-shared",
]
[[package]]
name = "foreign-types-shared"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
[[package]]
name = "form_urlencoded"
version = "1.0.1"
@ -716,16 +704,18 @@ dependencies = [
]
[[package]]
name = "hyper-tls"
version = "0.5.0"
name = "hyper-rustls"
version = "0.22.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d6183ddfa99b85da61a140bea0efc93fdf56ceaa041b37d553518030827f9905"
checksum = "5f9f7a97316d44c0af9b0301e65010573a853a9fc97046d7331d7f6bc0fd5a64"
dependencies = [
"bytes",
"futures-util",
"hyper",
"native-tls",
"log",
"rustls",
"tokio",
"tokio-native-tls",
"tokio-rustls",
"webpki",
]
[[package]]
@ -1001,24 +991,6 @@ dependencies = [
"winapi",
]
[[package]]
name = "native-tls"
version = "0.2.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b8d96b2e1c8da3957d58100b09f102c6d9cfdfced01b7ec5a8974044bb09dbd4"
dependencies = [
"lazy_static",
"libc",
"log",
"openssl",
"openssl-probe",
"openssl-sys",
"schannel",
"security-framework",
"security-framework-sys",
"tempfile",
]
[[package]]
name = "ntapi"
version = "0.3.6"
@ -1096,49 +1068,12 @@ version = "1.7.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "af8b08b04175473088b46763e51ee54da5f9a164bc162f615b91bc179dbf15a3"
[[package]]
name = "openssl"
version = "0.10.33"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a61075b62a23fef5a29815de7536d940aa35ce96d18ce0cc5076272db678a577"
dependencies = [
"bitflags",
"cfg-if",
"foreign-types",
"libc",
"once_cell",
"openssl-sys",
]
[[package]]
name = "openssl-probe"
version = "0.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "77af24da69f9d9341038eba93a073b1fdaaa1b788221b00a69bce9e762cb32de"
[[package]]
name = "openssl-src"
version = "111.15.0+1.1.1k"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b1a5f6ae2ac04393b217ea9f700cd04fa9bf3d93fae2872069f3d15d908af70a"
dependencies = [
"cc",
]
[[package]]
name = "openssl-sys"
version = "0.9.61"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "313752393519e876837e09e1fa183ddef0be7735868dced3196f4472d536277f"
dependencies = [
"autocfg",
"cc",
"libc",
"openssl-src",
"pkg-config",
"vcpkg",
]
[[package]]
name = "opentelemetry"
version = "0.12.0"
@ -1280,12 +1215,6 @@ version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
[[package]]
name = "pkg-config"
version = "0.3.19"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3831453b3449ceb48b6d9c7ad7c96d5ea673e9b470a1dc578c2ce6521230884c"
[[package]]
name = "png"
version = "0.16.8"
@ -1486,15 +1415,6 @@ version = "0.6.23"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "24d5f089152e60f62d28b835fbff2cd2e8dc0baf1ac13343bef92ab7eed84548"
[[package]]
name = "remove_dir_all"
version = "0.5.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
dependencies = [
"winapi",
]
[[package]]
name = "reqwest"
version = "0.11.3"
@ -1509,19 +1429,20 @@ dependencies = [
"http",
"http-body",
"hyper",
"hyper-tls",
"hyper-rustls",
"ipnet",
"js-sys",
"lazy_static",
"log",
"mime",
"native-tls",
"percent-encoding",
"pin-project-lite",
"rustls",
"rustls-native-certs",
"serde",
"serde_urlencoded",
"tokio",
"tokio-native-tls",
"tokio-rustls",
"url",
"wasm-bindgen",
"wasm-bindgen-futures",
@ -1886,6 +1807,18 @@ dependencies = [
"webpki",
]
[[package]]
name = "rustls-native-certs"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5a07b7c1885bd8ed3831c289b7870b13ef46fe0e856d288c30d9cc17d75a2092"
dependencies = [
"openssl-probe",
"rustls",
"schannel",
"security-framework",
]
[[package]]
name = "ryu"
version = "1.0.5"
@ -2191,20 +2124,6 @@ dependencies = [
"unicode-xid",
]
[[package]]
name = "tempfile"
version = "3.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dac1c663cfc93810f88aed9b8941d48cabf856a1b111c29a40439018d870eb22"
dependencies = [
"cfg-if",
"libc",
"rand",
"redox_syscall 0.2.5",
"remove_dir_all",
"winapi",
]
[[package]]
name = "termcolor"
version = "1.1.2"
@ -2358,16 +2277,6 @@ dependencies = [
"syn",
]
[[package]]
name = "tokio-native-tls"
version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f7d995660bd2b7f8c1568414c1126076c13fbb725c40112dc0120b78eb9b717b"
dependencies = [
"native-tls",
"tokio",
]
[[package]]
name = "tokio-rustls"
version = "0.22.0"
@ -2613,12 +2522,6 @@ dependencies = [
"percent-encoding",
]
[[package]]
name = "vcpkg"
version = "0.2.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b00bca6106a5e23f3eee943593759b7fcddb00554332e856d990c893966879fb"
[[package]]
name = "version_check"
version = "0.9.3"

7
Cargo.toml
View file

@ -49,7 +49,11 @@ rand = "0.8.3"
# Used to hash passwords
rust-argon2 = "0.8.3"
# Used to send requests
reqwest = { version = "0.11.1" }
reqwest = { version = "0.11.3", default-features = false, features = ["rustls-tls-native-roots"] }
# Custom TLS verifier
rustls = { version = "0.19", features = ["dangerous_configuration"] }
rustls-native-certs = "0.5.0"
webpki = "0.21.0"
# Used for conduit::Error type
thiserror = "1.0.24"
# Used to generate thumbnails for images
@ -75,7 +79,6 @@ pretty_env_logger = "0.4.0"
[features]
default = ["conduit_bin"]
conduit_bin = [] # TODO: add rocket to this when it is optional
tls_vendored = ["reqwest/native-tls-vendored"]
[[bin]]
name = "conduit"

49
src/database/globals.rs
View file

@ -1,9 +1,10 @@
use crate::{database::Config, utils, Error, Result};
use log::error;
use log::{error, info};
use ruma::{
api::federation::discovery::{ServerSigningKeys, VerifyKey},
ServerName, ServerSigningKeyId,
};
use rustls::{ServerCertVerifier, WebPKIVerifier};
use std::{
collections::{BTreeMap, HashMap},
sync::{Arc, RwLock},
@ -14,9 +15,11 @@ use trust_dns_resolver::TokioAsyncResolver;
pub const COUNTER: &str = "c";
type WellKnownMap = HashMap<Box<ServerName>, (String, String)>;
type TlsNameMap = HashMap<String, webpki::DNSName>;
#[derive(Clone)]
pub struct Globals {
pub actual_destination_cache: Arc<RwLock<WellKnownMap>>, // actual_destination, host
pub tls_name_override: Arc<RwLock<TlsNameMap>>,
pub(super) globals: sled::Tree,
config: Config,
keypair: Arc<ruma::signatures::Ed25519KeyPair>,
@ -26,6 +29,36 @@ pub struct Globals {
pub(super) servertimeout_signingkey: sled::Tree, // ServerName + Timeout Timestamp -> algorithm:key + pubkey
}
struct MatrixServerVerifier {
inner: WebPKIVerifier,
tls_name_override: Arc<RwLock<TlsNameMap>>,
}
impl ServerCertVerifier for MatrixServerVerifier {
fn verify_server_cert(
&self,
roots: &rustls::RootCertStore,
presented_certs: &[rustls::Certificate],
dns_name: webpki::DNSNameRef<'_>,
ocsp_response: &[u8],
) -> std::result::Result<rustls::ServerCertVerified, rustls::TLSError> {
if let Some(override_name) = self.tls_name_override.read().unwrap().get(dns_name.into()) {
let result = self.inner.verify_server_cert(
roots,
presented_certs,
override_name.as_ref(),
ocsp_response,
);
if result.is_ok() {
return result;
}
info!("Server {:?} is non-compliant, retrying TLS verification with original name", dns_name);
}
self.inner
.verify_server_cert(roots, presented_certs, dns_name, ocsp_response)
}
}
impl Globals {
pub fn load(
globals: sled::Tree,
@ -66,10 +99,21 @@ impl Globals {
}
};
let tls_name_override = Arc::new(RwLock::new(TlsNameMap::new()));
let verifier = Arc::new(MatrixServerVerifier {
inner: WebPKIVerifier::new(),
tls_name_override: tls_name_override.clone(),
});
let mut tlsconfig = rustls::ClientConfig::new();
tlsconfig.dangerous().set_certificate_verifier(verifier);
tlsconfig.root_store =
rustls_native_certs::load_native_certs().expect("Error loading system certificates");
let reqwest_client = reqwest::Client::builder()
.connect_timeout(Duration::from_secs(30))
.timeout(Duration::from_secs(60 * 3))
.pool_max_idle_per_host(1)
.use_preconfigured_tls(tlsconfig)
.build()
.unwrap();
@ -86,7 +130,8 @@ impl Globals {
dns_resolver: TokioAsyncResolver::tokio_from_system_conf().map_err(|_| {
Error::bad_config("Failed to set up trust dns resolver with system config.")
})?,
actual_destination_cache: Arc::new(RwLock::new(HashMap::new())),
actual_destination_cache: Arc::new(RwLock::new(WellKnownMap::new())),
tls_name_override,
servertimeout_signingkey,
jwt_decoding_key,
})

210
src/server_server.rs
View file

@ -53,6 +53,49 @@ use std::{
#[cfg(feature = "conduit_bin")]
use rocket::{get, post, put};
/// Wraps either an literal IP address plus port, or a hostname plus complement
/// (colon-plus-port if it was specified).
///
/// Note: A `FedDest::Named` might contain an IP address in string form if there
/// was no port specified to construct a SocketAddr with.
///
/// # Examples:
/// ```rust,ignore
/// FedDest::Literal("198.51.100.3:8448".parse()?);
/// FedDest::Literal("[2001:db8::4:5]:443".parse()?);
/// FedDest::Named("matrix.example.org".to_owned(), "".to_owned());
/// FedDest::Named("matrix.example.org".to_owned(), ":8448".to_owned());
/// FedDest::Named("198.51.100.5".to_owned(), "".to_owned());
/// ```
#[derive(Clone, Debug, PartialEq)]
enum FedDest {
Literal(SocketAddr),
Named(String, String),
}
impl FedDest {
fn into_https_string(self) -> String {
match self {
Self::Literal(addr) => format!("https://{}", addr),
Self::Named(host, port) => format!("https://{}{}", host, port),
}
}
fn into_uri_string(self) -> String {
match self {
Self::Literal(addr) => addr.to_string(),
Self::Named(host, ref port) => host + port,
}
}
fn hostname(&self) -> String {
match &self {
Self::Literal(addr) => addr.ip().to_string(),
Self::Named(host, _) => host.clone(),
}
}
}
#[tracing::instrument(skip(globals))]
pub async fn send_request<T: OutgoingRequest>(
globals: &crate::database::globals::Globals,
@ -77,12 +120,24 @@ where
result
} else {
let result = find_actual_destination(globals, &destination).await;
let (actual_destination, host) = result.clone();
let result_string = (result.0.into_https_string(), result.1.into_uri_string());
globals
.actual_destination_cache
.write()
.unwrap()
.insert(Box::<ServerName>::from(destination), result.clone());
result
.insert(Box::<ServerName>::from(destination), result_string.clone());
let dest_hostname = actual_destination.hostname();
let host_hostname = host.hostname();
if dest_hostname != host_hostname {
globals.tls_name_override.write().unwrap().insert(
dest_hostname,
webpki::DNSNameRef::try_from_ascii_str(&host_hostname)
.unwrap()
.to_owned(),
);
}
result_string
};
let mut http_request = request
@ -210,22 +265,23 @@ where
}
#[tracing::instrument]
fn get_ip_with_port(destination_str: String) -> Option<String> {
if destination_str.parse::<SocketAddr>().is_ok() {
Some(destination_str)
fn get_ip_with_port(destination_str: &str) -> Option<FedDest> {
if let Ok(destination) = destination_str.parse::<SocketAddr>() {
Some(FedDest::Literal(destination))
} else if let Ok(ip_addr) = destination_str.parse::<IpAddr>() {
Some(SocketAddr::new(ip_addr, 8448).to_string())
Some(FedDest::Literal(SocketAddr::new(ip_addr, 8448)))
} else {
None
}
}
#[tracing::instrument]
fn add_port_to_hostname(destination_str: String) -> String {
match destination_str.find(':') {
None => destination_str.to_owned() + ":8448",
Some(_) => destination_str.to_string(),
}
fn add_port_to_hostname(destination_str: &str) -> FedDest {
let (host, port) = match destination_str.find(':') {
None => (destination_str, ":8448"),
Some(pos) => destination_str.split_at(pos),
};
FedDest::Named(host.to_string(), port.to_string())
}
/// Returns: actual_destination, host header
@ -235,73 +291,89 @@ fn add_port_to_hostname(destination_str: String) -> String {
async fn find_actual_destination(
globals: &crate::database::globals::Globals,
destination: &'_ ServerName,
) -> (String, String) {
) -> (FedDest, FedDest) {
let destination_str = destination.as_str().to_owned();
let mut host = destination_str.clone();
let actual_destination = "https://".to_owned()
+ &match get_ip_with_port(destination_str.clone()) {
Some(host_port) => {
// 1: IP literal with provided or default port
host_port
}
None => {
if destination_str.find(':').is_some() {
// 2: Hostname with included port
destination_str
} else {
match request_well_known(globals, &destination.as_str()).await {
// 3: A .well-known file is available
Some(delegated_hostname) => {
host = delegated_hostname.clone();
match get_ip_with_port(delegated_hostname.clone()) {
Some(host_and_port) => host_and_port, // 3.1: IP literal in .well-known file
None => {
if destination_str.find(':').is_some() {
// 3.2: Hostname with port in .well-known file
destination_str
} else {
match query_srv_record(globals, &delegated_hostname).await {
// 3.3: SRV lookup successful
Some(hostname) => hostname,
// 3.4: No SRV records, just use the hostname from .well-known
None => add_port_to_hostname(delegated_hostname),
}
let mut hostname = destination_str.clone();
let actual_destination = match get_ip_with_port(&destination_str) {
Some(host_port) => {
// 1: IP literal with provided or default port
host_port
}
None => {
if let Some(pos) = destination_str.find(':') {
// 2: Hostname with included port
let (host, port) = destination_str.split_at(pos);
FedDest::Named(host.to_string(), port.to_string())
} else {
match request_well_known(globals, &destination.as_str()).await {
// 3: A .well-known file is available
Some(delegated_hostname) => {
hostname = delegated_hostname.clone();
match get_ip_with_port(&delegated_hostname) {
Some(host_and_port) => host_and_port, // 3.1: IP literal in .well-known file
None => {
if let Some(pos) = destination_str.find(':') {
// 3.2: Hostname with port in .well-known file
let (host, port) = destination_str.split_at(pos);
FedDest::Named(host.to_string(), port.to_string())
} else {
match query_srv_record(globals, &delegated_hostname).await {
// 3.3: SRV lookup successful
Some(hostname) => hostname,
// 3.4: No SRV records, just use the hostname from .well-known
None => add_port_to_hostname(&delegated_hostname),
}
}
}
}
// 4: No .well-known or an error occured
None => {
match query_srv_record(globals, &destination_str).await {
// 4: SRV record found
Some(hostname) => hostname,
// 5: No SRV record found
None => add_port_to_hostname(destination_str.to_string()),
}
}
// 4: No .well-known or an error occured
None => {
match query_srv_record(globals, &destination_str).await {
// 4: SRV record found
Some(hostname) => hostname,
// 5: No SRV record found
None => add_port_to_hostname(&destination_str),
}
}
}
}
};
}
};
(actual_destination, host)
// Can't use get_ip_with_port here because we don't want to add a port
// to an IP address if it wasn't specified
let hostname = if let Ok(addr) = hostname.parse::<SocketAddr>() {
FedDest::Literal(addr)
} else if let Ok(addr) = hostname.parse::<IpAddr>() {
FedDest::Named(addr.to_string(), "".to_string())
} else if let Some(pos) = hostname.find(':') {
let (host, port) = hostname.split_at(pos);
FedDest::Named(host.to_string(), port.to_string())
} else {
FedDest::Named(hostname, "".to_string())
};
(actual_destination, hostname)
}
#[tracing::instrument(skip(globals))]
async fn query_srv_record(
globals: &crate::database::globals::Globals,
hostname: &'_ str,
) -> Option<String> {
) -> Option<FedDest> {
if let Ok(Some(host_port)) = globals
.dns_resolver()
.srv_lookup(format!("_matrix._tcp.{}", hostname))
.await
.map(|srv| {
srv.iter().next().map(|result| {
format!(
"{}:{}",
result.target().to_string().trim_end_matches('.'),
result.port().to_string()
FedDest::Named(
result
.target()
.to_string()
.trim_end_matches('.')
.to_string(),
format!(":{}", result.port()),
)
})
})
@ -2133,45 +2205,45 @@ pub async fn fetch_required_signing_keys(
#[cfg(test)]
mod tests {
use super::{add_port_to_hostname, get_ip_with_port};
use super::{FedDest, add_port_to_hostname, get_ip_with_port};
#[test]
fn ips_get_default_ports() {
assert_eq!(
get_ip_with_port(String::from("1.1.1.1")),
Some(String::from("1.1.1.1:8448"))
get_ip_with_port("1.1.1.1"),
Some(FedDest::Literal("1.1.1.1:8448".parse().unwrap()))
);
assert_eq!(
get_ip_with_port(String::from("dead:beef::")),
Some(String::from("[dead:beef::]:8448"))
get_ip_with_port("dead:beef::"),
Some(FedDest::Literal("[dead:beef::]:8448".parse().unwrap()))
);
}
#[test]
fn ips_keep_custom_ports() {
assert_eq!(
get_ip_with_port(String::from("1.1.1.1:1234")),
Some(String::from("1.1.1.1:1234"))
get_ip_with_port("1.1.1.1:1234"),
Some(FedDest::Literal("1.1.1.1:1234".parse().unwrap()))
);
assert_eq!(
get_ip_with_port(String::from("[dead::beef]:8933")),
Some(String::from("[dead::beef]:8933"))
get_ip_with_port("[dead::beef]:8933"),
Some(FedDest::Literal("[dead::beef]:8933".parse().unwrap()))
);
}
#[test]
fn hostnames_get_default_ports() {
assert_eq!(
add_port_to_hostname(String::from("example.com")),
"example.com:8448"
add_port_to_hostname("example.com"),
FedDest::Named(String::from("example.com"), String::from(":8448"))
)
}
#[test]
fn hostnames_keep_custom_ports() {
assert_eq!(
add_port_to_hostname(String::from("example.com:1337")),
"example.com:1337"
add_port_to_hostname("example.com:1337"),
FedDest::Named(String::from("example.com"), String::from(":1337"))
)
}
}