Add additional login methods

src/middleware/basicAuth.js

@@ -2,14 +2,18 @@
  * When applied, this middleware will ensure the request contains the required header for basic authentication and only
  * allow access to the endpoint after successful authentication.
  */
-const { getConfig } = require('../util.js');
+const { getAllUserHandles, toKey, getPasswordHash } = require('../users.js');
+const { getConfig, getConfigValue } = require('../util.js');
+const storage = require('node-persist');
+
+const PERUSER_BASIC_AUTH = getConfigValue('perUserBasicAuth', false);
 
 const unauthorizedResponse = (res) => {
     res.set('WWW-Authenticate', 'Basic realm="SillyTavern", charset="UTF-8"');
     return res.status(401).send('Authentication required');
 };
 
-const basicAuthMiddleware = function (request, response, callback) {
+const basicAuthMiddleware = async function (request, response, callback) {
     const config = getConfig();
     const authHeader = request.headers.authorization;
 
@@ -27,11 +31,25 @@ const basicAuthMiddleware = function (request, response, callback) {
         .toString('utf8')
         .split(':');
 
-    if (username === config.basicAuthUser.username && password === config.basicAuthUser.password) {
+    
+    if (! PERUSER_BASIC_AUTH && username === config.basicAuthUser.username && password === config.basicAuthUser.password) {
         return callback();
-    } else {
-        return unauthorizedResponse(response);
+    } else if (PERUSER_BASIC_AUTH) {
+        const userHandles = await getAllUserHandles();
+        for (const userHandle of userHandles) {
+            if (username == userHandle) {
+                const user = await storage.getItem(toKey(userHandle));
+                if (user && (user.password && user.password === getPasswordHash(password, user.salt))) {
+                    return callback();
+                }
+                else if (user && !user.password && !password) {
+                    // Login to an account without password
+                    return callback();
+                }
+            }
+        }
     }
+    return unauthorizedResponse(response);
 };
 
 module.exports = basicAuthMiddleware;

src/users.js

@@ -19,6 +19,8 @@ const { readSecret, writeSecret } = require('./endpoints/secrets');
 const KEY_PREFIX = 'user:';
 const AVATAR_PREFIX = 'avatar:';
 const ENABLE_ACCOUNTS = getConfigValue('enableUserAccounts', false);
+const AUTHELIA_AUTH = getConfigValue('autheliaAuth', false);
+const PERUSER_BASIC_AUTH = getConfigValue('perUserBasicAuth', false);
 const ANON_CSRF_SECRET = crypto.randomBytes(64).toString('base64');
 
 /**
@@ -575,6 +577,31 @@ async function tryAutoLogin(request) {
         return false;
     }
 
+    if (await singler_user_login(request)) {
+        return true;
+    }
+
+    if (AUTHELIA_AUTH && await authelia_user_login(request)) {
+        return true;
+    }
+
+    if (PERUSER_BASIC_AUTH && await basic_user_login(request)) {
+        return true;
+    }
+
+    return false;
+}
+
+/**
+ * Tries auto-login if there is only one user and it's not password protected.
+ * @param {import('express').Request} request Request object
+ * @returns {Promise<boolean>} Whether auto-login was performed
+ */
+async function singler_user_login(request) {
+    if (!request.session) {
+        return false;
+    }
+
     const userHandles = await getAllUserHandles();
     if (userHandles.length === 1) {
         const user = await storage.getItem(toKey(userHandles[0]));
@@ -583,7 +610,78 @@ async function tryAutoLogin(request) {
             return true;
         }
     }
+    return false;
+}
 
+/**
+ * Tries auto-login with authlia trusted headers.
+ * https://www.authelia.com/integration/trusted-header-sso/introduction/
+ * @param {import('express').Request} request Request object
+ * @returns {Promise<boolean>} Whether auto-login was performed
+ */
+async function authelia_user_login(request) {
+    if (!request.session) {
+        return false;
+    }
+
+    const remote_user = request.get("Remote-User");
+    if (!remote_user) {
+        return false;
+    }
+
+    const userHandles = await getAllUserHandles();
+    for (const userHandle of userHandles) {
+        if (remote_user == userHandle) {
+            const user = await storage.getItem(toKey(userHandle));
+            if (user) {
+                request.session.handle = userHandle;
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+/**
+ * Tries auto-login with basic auth username.
+ * @param {import('express').Request} request Request object
+ * @returns {Promise<boolean>} Whether auto-login was performed
+ */
+async function basic_user_login(request) {
+    if (!request.session) {
+        return false;
+    }
+
+    const auth_header = request.get("Authorization");
+    if (!auth_header) {
+        return false;
+    }
+
+    const parts = auth_header.split(' ');
+    if (!parts || parts.length < 2 || parts[0].toLowerCase() != "basic") {
+        return false;
+    }
+
+    const b64auth = parts[1];
+    const [login, password] = Buffer.from(b64auth, 'base64').toString().split(':')
+
+    const userHandles = await getAllUserHandles();
+    for (const userHandle of userHandles) {
+        if (login == userHandle) {
+            const user = await storage.getItem(toKey(userHandle));
+            // Verify pass again here just to be sure
+            if (user && user.password && user.password === getPasswordHash(password, user.salt)) {
+                request.session.handle = userHandle;
+                return true;
+            }
+            else if (user && !user.password && !password) {
+                // Login to an account without password
+                request.session.handle = userHandle;
+                return true;
+            }
+        }
+    }
+    
     return false;
 }