rename api::client_server to api::client

Signed-off-by: Jason Volk <jason@zemos.net>

src/api/client/voip.rs

@@ -0,0 +1,51 @@
+use std::time::{Duration, SystemTime};
+
+use base64::{engine::general_purpose, Engine as _};
+use hmac::{Hmac, Mac};
+use ruma::{api::client::voip::get_turn_server_info, SecondsSinceUnixEpoch};
+use sha1::Sha1;
+
+use crate::{services, Result, Ruma};
+
+type HmacSha1 = Hmac<Sha1>;
+
+/// # `GET /_matrix/client/r0/voip/turnServer`
+///
+/// TODO: Returns information about the recommended turn server.
+pub(crate) async fn turn_server_route(
+	body: Ruma<get_turn_server_info::v3::Request>,
+) -> Result<get_turn_server_info::v3::Response> {
+	let sender_user = body.sender_user.as_ref().expect("user is authenticated");
+
+	let turn_secret = services().globals.turn_secret().clone();
+
+	let (username, password) = if !turn_secret.is_empty() {
+		let expiry = SecondsSinceUnixEpoch::from_system_time(
+			SystemTime::now()
+				.checked_add(Duration::from_secs(services().globals.turn_ttl()))
+				.expect("TURN TTL should not get this high"),
+		)
+		.expect("time is valid");
+
+		let username: String = format!("{}:{}", expiry.get(), sender_user);
+
+		let mut mac = HmacSha1::new_from_slice(turn_secret.as_bytes()).expect("HMAC can take key of any size");
+		mac.update(username.as_bytes());
+
+		let password: String = general_purpose::STANDARD.encode(mac.finalize().into_bytes());
+
+		(username, password)
+	} else {
+		(
+			services().globals.turn_username().clone(),
+			services().globals.turn_password().clone(),
+		)
+	};
+
+	Ok(get_turn_server_info::v3::Response {
+		username,
+		password,
+		uris: services().globals.turn_uris().to_vec(),
+		ttl: Duration::from_secs(services().globals.turn_ttl()),
+	})
+}