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Implement TURN server authentication with hmac
This is a prefered method to allow limited access to the TURN server
This commit is contained in:
Moritz Bitsch
parent
109892b4b7
commit
9fccbb014a
5 changed files with 88 additions and 7 deletions
35
Cargo.lock
generated
35
Cargo.lock
generated
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@ -245,6 +245,7 @@ dependencies = [
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"crossbeam",
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"directories",
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"heed",
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"hmac",
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"http",
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"image",
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"jsonwebtoken",
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@ -266,6 +267,7 @@ dependencies = [
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"serde",
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"serde_json",
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"serde_yaml",
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"sha-1",
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"sled",
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"thiserror",
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"thread_local",
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@ -428,6 +430,16 @@ dependencies = [
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"lazy_static",
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]
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[[package]]
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name = "crypto-mac"
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version = "0.11.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b1d1a86f49236c215f271d40892d5fc950490551400b02ef360692c29815c714"
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dependencies = [
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"generic-array",
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"subtle",
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]
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[[package]]
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name = "curve25519-dalek"
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version = "3.2.0"
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@ -897,6 +909,16 @@ dependencies = [
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"libc",
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]
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[[package]]
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name = "hmac"
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version = "0.11.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "2a2a2320eb7ec0ebe8da8f744d7812d9fc4cb4d09344ac01898dbcb6a20ae69b"
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dependencies = [
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"crypto-mac",
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"digest",
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]
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[[package]]
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name = "hostname"
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version = "0.3.1"
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@ -2422,6 +2444,19 @@ dependencies = [
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"yaml-rust",
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]
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[[package]]
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name = "sha-1"
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version = "0.9.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "99cd6713db3cf16b6c84e06321e049a9b9f699826e16096d23bbcc44d15d51a6"
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dependencies = [
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"block-buffer",
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"cfg-if 1.0.0",
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"cpufeatures",
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"digest",
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"opaque-debug",
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]
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[[package]]
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name = "sha1"
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version = "0.6.0"
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@ -79,6 +79,9 @@ num_cpus = "1.13.0"
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threadpool = "1.8.1"
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heed = { git = "https://github.com/timokoesters/heed.git", rev = "f6f825da7fb2c758867e05ad973ef800a6fe1d5d", optional = true }
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thread_local = "1.1.3"
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# used for TURN server authentication
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hmac = "0.11.0"
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sha-1 = "0.9.8"
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[features]
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default = ["conduit_bin", "backend_sqlite"]
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@ -1,6 +1,11 @@
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use crate::{database::DatabaseGuard, ConduitResult};
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use crate::{database::DatabaseGuard, ConduitResult, Ruma};
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use hmac::{Hmac, Mac, NewMac};
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use ruma::api::client::r0::voip::get_turn_server_info;
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use std::time::Duration;
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use ruma::SecondsSinceUnixEpoch;
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use sha1::Sha1;
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use std::time::{Duration, SystemTime};
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type HmacSha1 = Hmac<Sha1>;
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#[cfg(feature = "conduit_bin")]
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use rocket::get;
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@ -8,12 +13,44 @@ use rocket::get;
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/// # `GET /_matrix/client/r0/voip/turnServer`
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///
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/// TODO: Returns information about the recommended turn server.
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#[cfg_attr(feature = "conduit_bin", get("/_matrix/client/r0/voip/turnServer"))]
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#[tracing::instrument(skip(db))]
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pub async fn turn_server_route(db: DatabaseGuard) -> ConduitResult<get_turn_server_info::Response> {
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#[cfg_attr(
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feature = "conduit_bin",
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get("/_matrix/client/r0/voip/turnServer", data = "<body>")
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)]
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#[tracing::instrument(skip(body, db))]
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pub async fn turn_server_route(
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body: Ruma<get_turn_server_info::Request>,
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db: DatabaseGuard,
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) -> ConduitResult<get_turn_server_info::Response> {
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let sender_user = body.sender_user.as_ref().expect("user is authenticated");
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let turn_secret = db.globals.turn_secret();
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let (username, password) = if turn_secret != "" {
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let expiry = SecondsSinceUnixEpoch::from_system_time(
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SystemTime::now() + Duration::from_secs(db.globals.turn_ttl()),
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)
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.expect("time is valid");
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let username: String = format!("{}:{}", expiry.get(), sender_user);
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let mut mac = HmacSha1::new_from_slice(turn_secret.as_bytes())
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.expect("HMAC can take key of any size");
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mac.update(username.as_bytes());
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let password: String = base64::encode_config(mac.finalize().into_bytes(), base64::STANDARD);
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(username, password)
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} else {
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(
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db.globals.turn_username().clone(),
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db.globals.turn_password().clone(),
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)
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};
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Ok(get_turn_server_info::Response {
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username: db.globals.turn_username().clone(),
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password: db.globals.turn_password().clone(),
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username: username,
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password: password,
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uris: db.globals.turn_uris().to_vec(),
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ttl: Duration::from_secs(db.globals.turn_ttl()),
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}
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@ -80,6 +80,8 @@ pub struct Config {
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turn_password: String,
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#[serde(default = "Vec::new")]
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turn_uris: Vec<String>,
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#[serde(default)]
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turn_secret: String,
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#[serde(default = "default_turn_ttl")]
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turn_ttl: u64,
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@ -242,6 +242,10 @@ impl Globals {
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&self.config.turn_username
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}
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pub fn turn_secret(&self) -> &String {
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&self.config.turn_secret
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}
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/// TODO: the key valid until timestamp is only honored in room version > 4
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/// Remove the outdated keys and insert the new ones.
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///
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