key config optinal

1 files changed, 14 insertions, 1 deletions

diff --git a/server/src/routes/ui/account/session/token.rs b/server/src/routes/ui/account/session/token.rs
index c8913d3..c02eff7 100644
--- a/server/src/routes/ui/account/session/token.rs
+++ b/server/src/routes/ui/account/session/token.rs
@@ -4,6 +4,7 @@
     Copyright (C) 2023 metamuffin <metamuffin.org>
 */
 use super::SessionData;
+use crate::CONF;
 use aes_gcm_siv::{
     aead::{generic_array::GenericArray, Aead},
     KeyInit,
@@ -11,9 +12,21 @@ use aes_gcm_siv::{
 use anyhow::anyhow;
 use base64::Engine;
 use chrono::{Duration, Utc};
+use log::warn;
 use std::sync::LazyLock;
 
-static SESSION_KEY: LazyLock<[u8; 32]> = LazyLock::new(|| [(); 32].map(|_| rand::random()));
+static SESSION_KEY: LazyLock<[u8; 32]> = LazyLock::new(|| {
+    if let Some(sk) = &CONF.session_key {
+        let r = base64::engine::general_purpose::STANDARD
+            .decode(sk)
+            .expect("key invalid; should be valid base64");
+        r.try_into()
+            .expect("key has the wrong length; should be 32 bytes")
+    } else {
+        warn!("session_key not configured; generating a random one.");
+        [(); 32].map(|_| rand::random())
+    }
+});
 
 pub fn create(username: String, expire: Duration) -> String {
     let session_data = SessionData {