Superuser

2025-10-24 18:39:32 +00:00
parent 9133928401
commit f0b1ca4b68
19 changed files with 865 additions and 188 deletions
@@ -0,0 +1,212 @@
+import crypto from 'crypto';
+import { db } from '../db/index.js';
+
+export const SUPERUSER_GROUP_NAME = 'superuser';
+
+const selectGroupByName = db.prepare('SELECT * FROM user_groups WHERE name = ?');
+const insertGroup = db.prepare('INSERT INTO user_groups (name, description) VALUES (?, ?)');
+
+const selectSuperuser = db.prepare(`
+  SELECT u.*
+  FROM users u
+  INNER JOIN user_group_memberships m ON m.user_id = u.id
+  INNER JOIN user_groups g ON g.id = m.group_id
+  WHERE g.name = ?
+  LIMIT 1
+`);
+
+const selectUserByUsername = db.prepare('SELECT * FROM users WHERE username = ?');
+const selectUserByEmail = db.prepare('SELECT * FROM users WHERE email = ?');
+const selectUserById = db.prepare('SELECT * FROM users WHERE id = ?');
+
+const insertUser = db.prepare(`
+  INSERT INTO users (username, email, password_hash, password_salt, is_active, created_at, updated_at)
+  VALUES (?, ?, ?, ?, 1, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+`);
+
+const updateUser = db.prepare(`
+  UPDATE users
+  SET username = ?, email = ?, password_hash = ?, password_salt = ?, is_active = 1, updated_at = CURRENT_TIMESTAMP
+  WHERE id = ?
+`);
+
+const insertMembership = db.prepare(`
+  INSERT OR IGNORE INTO user_group_memberships (user_id, group_id, role)
+  VALUES (?, ?, ?)
+`);
+
+const removeMembershipsForGroup = db.prepare(`
+  DELETE FROM user_group_memberships
+  WHERE group_id = ?
+`);
+
+const selectUserIdsForGroup = db.prepare(`
+  SELECT u.id
+  FROM users u
+  INNER JOIN user_group_memberships m ON m.user_id = u.id
+  WHERE m.group_id = ?
+`);
+
+const deleteUserById = db.prepare('DELETE FROM users WHERE id = ?');
+const deleteGroupById = db.prepare('DELETE FROM user_groups WHERE id = ?');
+
+const countSuperusers = db.prepare(`
+  SELECT COUNT(*) as count
+  FROM user_group_memberships m
+  INNER JOIN user_groups g ON g.id = m.group_id
+  WHERE g.name = ?
+`);
+
+const creationTransaction = db.transaction(({ username, email, passwordHash, passwordSalt, groupId }) => {
+  const existingUser = selectUserByUsername.get(username) || selectUserByEmail.get(email);
+
+  let userId;
+  if (existingUser) {
+    updateUser.run(username, email, passwordHash, passwordSalt, existingUser.id);
+    userId = existingUser.id;
+  } else {
+    const result = insertUser.run(username, email, passwordHash, passwordSalt);
+    userId = result.lastInsertRowid;
+  }
+
+  removeMembershipsForGroup.run(groupId);
+  insertMembership.run(userId, groupId, SUPERUSER_GROUP_NAME);
+
+  return selectUserById.get(userId);
+});
+
+function hashPassword(password) {
+  if (!password || typeof password !== 'string') {
+    throw new Error('INVALID_PASSWORD');
+  }
+  const trimmed = password.trim();
+  if (trimmed.length < 8) {
+    throw new Error('PASSWORD_TOO_SHORT');
+  }
+  const salt = crypto.randomBytes(16).toString('hex');
+  const hash = crypto.pbkdf2Sync(trimmed, salt, 120000, 64, 'sha512').toString('hex');
+  return { salt, hash };
+}
+
+function ensureGroup(name, description = null) {
+  let group = selectGroupByName.get(name);
+  if (group) return group;
+  insertGroup.run(name, description);
+  group = selectGroupByName.get(name);
+  return group;
+}
+
+export function hasSuperuser() {
+  const { count } = countSuperusers.get(SUPERUSER_GROUP_NAME);
+  return count > 0;
+}
+
+function createOrUpdateSuperuser({ username, email, password }) {
+  const normalizedUsername = String(username || '').trim();
+  const normalizedEmail = String(email || '').trim().toLowerCase();
+
+  if (!normalizedUsername) {
+    throw new Error('USERNAME_REQUIRED');
+  }
+
+  if (!normalizedEmail || !normalizedEmail.includes('@')) {
+    throw new Error('EMAIL_INVALID');
+  }
+
+  const { hash, salt } = hashPassword(password);
+  const group = ensureGroup(SUPERUSER_GROUP_NAME, 'System Superuser');
+
+  const user = creationTransaction({
+    username: normalizedUsername,
+    email: normalizedEmail,
+    passwordHash: hash,
+    passwordSalt: salt,
+    groupId: group.id
+  });
+
+  return {
+    id: user.id,
+    username: user.username,
+    email: user.email
+  };
+}
+
+const deletionTransaction = db.transaction((groupId) => {
+  const members = selectUserIdsForGroup.all(groupId);
+
+  members.forEach(({ id }) => {
+    deleteUserById.run(id);
+  });
+
+  const { changes: groupChanges } = deleteGroupById.run(groupId);
+
+  return {
+    usersRemoved: members.length,
+    groupRemoved: groupChanges > 0
+  };
+});
+
+export function ensureSuperuserFromEnv() {
+  const username = process.env.SUPERUSER_USERNAME;
+  const email = process.env.SUPERUSER_EMAIL;
+  const password = process.env.SUPERUSER_PASSWORD;
+
+  if (hasSuperuser()) {
+    if (username || email || password) {
+      console.log('ℹ️ Superuser existiert bereits - Umgebungsvariablen werden ignoriert.');
+    }
+    return false;
+  }
+
+  if (!username || !email || !password) {
+    return false;
+  }
+
+  try {
+    createOrUpdateSuperuser({ username, email, password });
+    console.log('✅ Superuser aus Umgebungsvariablen angelegt.');
+    return true;
+  } catch (error) {
+    console.error('⚠️ Superuser konnte nicht aus Umgebungsvariablen erzeugt werden:', error.message);
+    return false;
+  }
+}
+
+export function registerSuperuser({ username, email, password }) {
+  if (hasSuperuser()) {
+    const err = new Error('SUPERUSER_ALREADY_EXISTS');
+    err.code = 'SUPERUSER_ALREADY_EXISTS';
+    throw err;
+  }
+
+  try {
+    return createOrUpdateSuperuser({ username, email, password });
+  } catch (error) {
+    if (error.message === 'USERNAME_REQUIRED' || error.message === 'EMAIL_INVALID' || error.message === 'PASSWORD_TOO_SHORT') {
+      error.code = error.message;
+    }
+    throw error;
+  }
+}
+
+export function removeSuperuser() {
+  const group = selectGroupByName.get(SUPERUSER_GROUP_NAME);
+
+  if (!group) {
+    const error = new Error('SUPERUSER_NOT_FOUND');
+    error.code = 'SUPERUSER_NOT_FOUND';
+    throw error;
+  }
+
+  return deletionTransaction(group.id);
+}
+
+export function getSuperuserSummary() {
+  const user = selectSuperuser.get(SUPERUSER_GROUP_NAME);
+  if (!user) return null;
+  return {
+    id: user.id,
+    username: user.username,
+    email: user.email
+  };
+}