set SameSite to Lax on session cookies

[squeep-authentication-module] / lib / authenticator.js

diff --git a/lib/authenticator.js b/lib/authenticator.js
index efa3d844e7502cd024c6c99da830342dfe04954f..0c0c349b7288af20f0fc7df421c91aeddd61a3dc 100644 (file)
--- a/lib/authenticator.js
+++ b/lib/authenticator.js
@@ -20,6 +20,7 @@ class Authenticator {
    * @param {Boolean} options.authenticator.secureAuthOnly
    * @param {String[]} options.authenticator.forbiddenPAMIdentifiers
    * @param {String[]} options.authenticator.authnEnabled
+   * @param {Number=} options.authenticator.inactiveSessionLifespanSeconds
    * @param {String[]=} options.authenticator.loginBlurb
    * @param {String[]=} options.authenticator.indieAuthBlurb
    * @param {String[]=} options.authenticator.userBlurb
@@ -51,6 +52,8 @@ class Authenticator {
     }
 
     this.mysteryBox = new MysteryBox(logger, options);
+
+    this.cookieLifespan = options.authenticator.inactiveSessionLifespanSeconds || 60 * 60 * 24 * 32;
   }
 
 
@@ -259,6 +262,18 @@ class Authenticator {
     &&  (ctx.session.authenticatedIdentifier
          || (profilesAllowed && ctx.session.authenticatedProfile))) {
       this.logger.debug(_scope, 'valid session cookie', { ctx });
+      // Refresh timeout on valid session.
+      const cookieParts = [
+        sessionCookie,
+        'HttpOnly',
+        `Max-Age=${this.cookieLifespan}`,
+        'SameSite=Lax',
+        `Path=${this.options.dingus.proxyPrefix}/`,
+      ];
+      if (this.options.authenticator.secureAuthOnly) {
+        cookieParts.push('Secure');
+      }
+      res.setHeader(Enum.Header.SetCookie, cookieParts.join('; '));
       return true;
     }
 
@@ -268,6 +283,7 @@ class Authenticator {
         `${Enum.SessionCookie}=""`,
         'HttpOnly',
         'Max-Age=0',
+        'SameSite=Lax',
         `Path=${this.options.dingus.proxyPrefix}/`,
       ];
       if (this.options.authenticator.secureAuthOnly) {
@@ -338,7 +354,8 @@ class Authenticator {
 
   /**
    * Require auth for an API endpoint.
-   * Check for valid local identifier in session, or Authentication header.
+   * Check for valid local identifier in Authorization header; optionally
+   * fall back to session cookie if no header provided.
    * Prompts for Basic auth if not valid.
    * @param {http.ClientRequest} req
    * @param {http.ServerResponse} res
@@ -346,15 +363,28 @@ class Authenticator {
    * @param {Boolean} sessionAlsoValid
    */
   async apiRequiredLocal(req, res, ctx, sessionAlsoValid = true) {
-    const validSession = sessionAlsoValid && this.sessionCheck(req, res, ctx, undefined, false, false);
+    const _scope = _fileScope('apiRequiredLocal');
+    this.logger.debug(_scope, 'called', { ctx, sessionAlsoValid });
+
+    // If a Authorization header was provided, never consider session as a fallback.
     const authorizationHeader = req.getHeader(Enum.Header.Authorization);
-    const validAuthorization = authorizationHeader && this.isValidAuthorization(authorizationHeader, ctx);
-    if (validSession || validAuthorization) {
-      return true;
+    if (authorizationHeader) {
+      if (await this.isValidAuthorization(authorizationHeader, ctx)) {
+        this.logger.debug(_scope, 'valid authorization', { ctx, sessionAlsoValid });
+        return true;
+      }
+    } else {
+      if (sessionAlsoValid
+      &&  await this.sessionCheck(req, res, ctx, undefined, false, false)) {
+        this.logger.debug(_scope, 'valid session', { ctx, sessionAlsoValid });
+        return true;
+      }
     }
+
+    this.logger.debug(_scope, 'invalid authorization', { ctx, sessionAlsoValid });
     this.requestBasic(res);
   }
 
 }
 
-module.exports = Authenticator;
\ No newline at end of file
+module.exports = Authenticator;