Add users authentication routes

matrixgw_backend/src/constants.rs

@@ -0,0 +1,15 @@
+/// Auth header
+pub const API_AUTH_HEADER: &str = "x-client-auth";
+
+/// Max token validity, in seconds
+pub const API_TOKEN_JWT_MAX_DURATION: u64 = 15 * 60;
+
+/// Session-specific constants
+pub mod sessions {
+    /// OpenID auth session state key
+    pub const OIDC_STATE_KEY: &str = "oidc-state";
+    /// OpenID auth remote IP address
+    pub const OIDC_REMOTE_IP: &str = "oidc-remote-ip";
+    /// Authenticated ID
+    pub const USER_ID: &str = "uid";
+}