Add LDAP auth module (#6226)

spec/MockLdapServer.js

@@ -0,0 +1,48 @@
+const ldapjs = require('ldapjs');
+
+function newServer(port, dn, provokeSearchError = false) {
+  const server = ldapjs.createServer();
+
+  server.bind('o=example', function(req, res, next) {
+    if (req.dn.toString() !== dn || req.credentials !== 'secret')
+      return next(new ldapjs.InvalidCredentialsError());
+    res.end();
+    return next();
+  });
+
+  server.search('o=example', function(req, res, next) {
+    if (provokeSearchError) {
+      res.end(ldapjs.LDAP_SIZE_LIMIT_EXCEEDED);
+      return next(new ldapjs.NoSuchObjectError('fake error'));
+    }
+    const obj = {
+      dn: req.dn.toString(),
+      attributes: {
+        objectclass: ['organization', 'top'],
+        o: 'example',
+      },
+    };
+
+    const group = {
+      dn: req.dn.toString(),
+      attributes: {
+        objectClass: ['groupOfUniqueNames', 'top'],
+        uniqueMember: ['uid=testuser, o=example'],
+        cn: 'powerusers',
+        ou: 'powerusers',
+      },
+    };
+
+    if (req.filter.matches(obj.attributes)) {
+      res.send(obj);
+    }
+
+    if (req.filter.matches(group.attributes)) {
+      res.send(group);
+    }
+    res.end();
+  });
+  return new Promise(resolve => server.listen(port, () => resolve(server)));
+}
+
+module.exports = newServer;