Add basic authorization support for single-factor protected endpoints

One can now access a service using the basic authorization mechanism. Note the
service must not be protected by 2 factors.

The Remote-User and Remote-Groups are forwarded from Authelia like any browser
authentication.

README.md

@@ -22,7 +22,7 @@ used in production to secure internal services in a small docker swarm cluster.
     3. [Second factor with U2F security keys](#second-factor-with-u2f-security-keys)
     4. [Password reset](#password-reset)
     5. [Access control](#access-control)
-    6. [Basic authentication](#basic-authentication)
+    6. [Single factor authentication](#single-factor-authentication)
     7. [Session management with Redis](#session-management-with-redis)
 4. [Security](#security)
 5. [Documentation](#documentation)
@@ -37,12 +37,12 @@ used in production to secure internal services in a small docker swarm cluster.
 * Two-factor authentication using either 
 **[TOTP] - Time-Base One Time password -** or **[U2F] - Universal 2-Factor -** 
 as 2nd factor.
-* Password reset with identity verification by sending links to user email 
-address.
-* Two-factor and basic authentication methods available. 
+* Password reset with identity verification using email.
+* Single and two factors authentication methods available. 
 * Access restriction after too many authentication attempts.
-* Session management using Redis key/value store.
 * User-defined access control per subdomain and resource.
+* Support of [basic authentication] for endpoints protected by single factor.
+* High-availability using a highly-available distributed database and KV store.
 
 ## Deployment
 
@@ -190,11 +190,14 @@ user access to some resources and subdomains. Those rules are defined and fully
 in the configuration file. They can apply to users, groups or everyone.
 Check out [config.template.yml] to see how they are defined.
 
-### Basic Authentication
-Authelia allows you to customize the authentication method to use for each sub-domain.
-The supported methods are either "single_factor" and "two_factor". 
+### Single factor authentication
+Authelia allows you to customize the authentication method to use for each 
+sub-domain.The supported methods are either "single_factor" or "two_factor". 
 Please see [config.template.yml] to see an example of configuration.
 
+It is also possible to use [basic authentication] to access a resource 
+protected by a single factor.
+
 ### Session management with Redis
 When your users authenticate against Authelia, sessions are stored in a Redis key/value store. You can specify your own Redis instance in [config.template.yml].
 
@@ -293,3 +296,4 @@ Follow [contributing](CONTRIBUTORS.md) file.
 [Google Authenticator]: https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=en
 [config.template.yml]: https://github.com/clems4ever/authelia/blob/master/config.template.yml
 [HSTS]: https://www.nginx.com/blog/http-strict-transport-security-hsts-and-nginx/
+[basic authentication]: https://en.wikipedia.org/wiki/Basic_access_authentication

example/nginx/nginx.conf

@@ -262,6 +262,7 @@ http {
             proxy_set_header  X-Forwarded-Proto $scheme;
             proxy_set_header  Host $http_host;
             proxy_set_header  Content-Length "";
+            proxy_set_header  Proxy-Authorization $http_authorization;
 
             proxy_pass        http://authelia/api/verify;
         }
@@ -280,6 +281,23 @@ http {
             error_page 401 =302 https://auth.test.local:8080?redirect=$redirect;
             error_page 403 = https://auth.test.local:8080/error/403;
         }
+
+        location /headers {
+            auth_request /auth_verify;
+
+            auth_request_set $redirect $upstream_http_redirect;
+
+            auth_request_set $user $upstream_http_remote_user;
+            proxy_set_header Custom-Forwarded-User $user;
+            
+            auth_request_set $groups $upstream_http_remote_groups;
+            proxy_set_header Custom-Forwarded-Groups $groups;
+
+            proxy_pass        http://httpbin:8000/headers;
+
+            error_page 401 =302 https://auth.test.local:8080?redirect=$redirect;
+            error_page 403 = https://auth.test.local:8080/error/403;
+        }
     }
 }
 

server/src/lib/routes/verify/access_control.ts

@@ -0,0 +1,22 @@
+import Express = require("express");
+import BluebirdPromise = require("bluebird");
+import Util = require("util");
+
+import { ServerVariables } from "../../ServerVariables";
+import Exceptions = require("../../Exceptions");
+
+export default function (req: Express.Request, vars: ServerVariables,
+  domain: string, path: string, username: string, groups: string[]) {
+
+  return new BluebirdPromise(function (resolve, reject) {
+    const isAllowed = vars.accessController
+      .isAccessAllowed(domain, path, username, groups);
+
+    if (!isAllowed) {
+      reject(new Exceptions.DomainAccessDenied(Util.format(
+        "User '%s' does not have access to '%s'", username, domain)));
+      return;
+    }
+    resolve();
+  });
+}

server/src/lib/routes/verify/get.ts

@@ -1,118 +1,69 @@
-
-import objectPath = require("object-path");
 import BluebirdPromise = require("bluebird");
-import express = require("express");
-import exceptions = require("../../Exceptions");
-import winston = require("winston");
+import Express = require("express");
+import Exceptions = require("../../Exceptions");
 import ErrorReplies = require("../../ErrorReplies");
-import { AppConfiguration } from "../../configuration/Configuration";
-import { AuthenticationSessionHandler } from "../../AuthenticationSessionHandler";
-import { AuthenticationSession } from "../../../../types/AuthenticationSession";
-import Constants = require("../../../../../shared/constants");
-import Util = require("util");
-import { DomainExtractor } from "../../utils/DomainExtractor";
 import { ServerVariables } from "../../ServerVariables";
-import { MethodCalculator } from "../../authentication/MethodCalculator";
-import { IRequestLogger } from "../../logging/IRequestLogger";
+import GetWithSessionCookieMethod from "./get_session_cookie";
+import GetWithBasicAuthMethod from "./get_basic_auth";
 
-const FIRST_FACTOR_NOT_VALIDATED_MESSAGE = "First factor not yet validated";
-const SECOND_FACTOR_NOT_VALIDATED_MESSAGE = "Second factor not yet validated";
+import { AuthenticationSessionHandler }
+  from "../../AuthenticationSessionHandler";
+import { AuthenticationSession }
+  from "../../../../types/AuthenticationSession";
 
 const REMOTE_USER = "Remote-User";
 const REMOTE_GROUPS = "Remote-Groups";
 
-function verify_inactivity(req: express.Request,
-  authSession: AuthenticationSession,
-  configuration: AppConfiguration, logger: IRequestLogger)
-  : BluebirdPromise<void> {
 
-  const lastActivityTime = authSession.last_activity_datetime;
-  const currentTime = new Date().getTime();
-  authSession.last_activity_datetime = currentTime;
+function verifyWithSelectedMethod(req: Express.Request, res: Express.Response,
+  vars: ServerVariables, authSession: AuthenticationSession)
+  : () => BluebirdPromise<{ username: string, groups: string[] }> {
+  return function () {
+    const authorization: string = "" + req.headers["proxy-authorization"];
+    if (authorization && authorization.startsWith("Basic "))
+      return GetWithBasicAuthMethod(req, res, vars, authorization);
 
-  // If inactivity is not specified, then inactivity timeout does not apply
-  if (!configuration.session.inactivity) {
-    return BluebirdPromise.resolve();
-  }
-
-  const inactivityPeriodMs = currentTime - lastActivityTime;
-  logger.debug(req, "Inactivity period was %s s and max period was %s.",
-    inactivityPeriodMs / 1000, configuration.session.inactivity / 1000);
-  if (inactivityPeriodMs < configuration.session.inactivity) {
-    return BluebirdPromise.resolve();
-  }
-
-  logger.debug(req, "Session has been reset after too long inactivity period.");
-  AuthenticationSessionHandler.reset(req);
-  return BluebirdPromise.reject(new Error("Inactivity period exceeded."));
+    return GetWithSessionCookieMethod(req, res, vars, authSession);
+  };
 }
 
-function verify_filter(req: express.Request, res: express.Response,
-  vars: ServerVariables): BluebirdPromise<void> {
-  let authSession: AuthenticationSession;
-  let username: string;
-  let groups: string[];
-
-  return new BluebirdPromise(function (resolve, reject) {
-    authSession = AuthenticationSessionHandler.get(req, vars.logger);
-    username = authSession.userid;
-    groups = authSession.groups;
-
+function setRedirectHeader(req: Express.Request, res: Express.Response) {
+  return function () {
     res.set("Redirect", encodeURIComponent("https://" + req.headers["host"] +
       req.headers["x-original-uri"]));
-
-    if (!authSession.userid) {
-      reject(new exceptions.AccessDeniedError(
-        Util.format("%s: %s.", FIRST_FACTOR_NOT_VALIDATED_MESSAGE, "userid is missing")));
-      return;
-    }
-
-    const host = objectPath.get<express.Request, string>(req, "headers.host");
-    const path = objectPath.get<express.Request, string>(req, "headers.x-original-uri");
-
-    const domain = DomainExtractor.fromHostHeader(host);
-    const authenticationMethod =
-      MethodCalculator.compute(vars.config.authentication_methods, domain);
-    vars.logger.debug(req, "domain=%s, path=%s, user=%s, groups=%s", domain, path,
-      username, groups.join(","));
-
-    if (!authSession.first_factor)
-      return reject(new exceptions.AccessDeniedError(
-        Util.format("%s: %s.", FIRST_FACTOR_NOT_VALIDATED_MESSAGE, "first factor is false")));
-
-    if (authenticationMethod == "two_factor" && !authSession.second_factor)
-      return reject(new exceptions.AccessDeniedError(
-        Util.format("%s: %s.", SECOND_FACTOR_NOT_VALIDATED_MESSAGE, "second factor is false")));
-
-    const isAllowed = vars.accessController.isAccessAllowed(domain, path, username, groups);
-    if (!isAllowed) return reject(
-      new exceptions.DomainAccessDenied(Util.format("User '%s' does not have access to '%s'",
-        username, domain)));
-
-    resolve();
-  })
-    .then(function () {
-      return verify_inactivity(req, authSession,
-        vars.config, vars.logger);
-    })
-    .then(function () {
-      res.setHeader(REMOTE_USER, username);
-      res.setHeader(REMOTE_GROUPS, groups.join(","));
     return BluebirdPromise.resolve();
-    });
+  };
+}
+
+function setUserAndGroupsHeaders(res: Express.Response) {
+  return function (u: { username: string, groups: string[] }) {
+    res.setHeader(REMOTE_USER, u.username);
+    res.setHeader(REMOTE_GROUPS, u.groups.join(","));
+    return BluebirdPromise.resolve();
+  };
+}
+
+function replyWith200(res: Express.Response) {
+  return function () {
+    res.status(204);
+    res.send();
+  };
 }
 
 export default function (vars: ServerVariables) {
-  return function (req: express.Request, res: express.Response)
+  return function (req: Express.Request, res: Express.Response)
     : BluebirdPromise<void> {
-    return verify_filter(req, res, vars)
-      .then(function () {
-        res.status(204);
-        res.send();
-        return BluebirdPromise.resolve();
+    let authSession: AuthenticationSession;
+    return new BluebirdPromise(function (resolve, reject) {
+      authSession = AuthenticationSessionHandler.get(req, vars.logger);
+      resolve();
     })
+      .then(setRedirectHeader(req, res))
+      .then(verifyWithSelectedMethod(req, res, vars, authSession))
+      .then(setUserAndGroupsHeaders(res))
+      .then(replyWith200(res))
       // The user is authenticated but has restricted access -> 403
-      .catch(exceptions.DomainAccessDenied, ErrorReplies
+      .catch(Exceptions.DomainAccessDenied, ErrorReplies
         .replyWithError403(req, res, vars.logger))
       // The user is not yet authenticated -> 401
       .catch(ErrorReplies.replyWithError401(req, res, vars.logger));

server/src/lib/routes/verify/get_basic_auth.ts

@@ -0,0 +1,75 @@
+import Express = require("express");
+import BluebirdPromise = require("bluebird");
+import ObjectPath = require("object-path");
+import { ServerVariables } from "../../ServerVariables";
+import { AuthenticationSession }
+  from "../../../../types/AuthenticationSession";
+import { DomainExtractor } from "../../utils/DomainExtractor";
+import { MethodCalculator } from "../../authentication/MethodCalculator";
+import AccessControl from "./access_control";
+
+export default function (req: Express.Request, res: Express.Response,
+  vars: ServerVariables, authorizationHeader: string)
+  : BluebirdPromise<{ username: string, groups: string[] }> {
+  let username: string;
+  let groups: string[];
+  let domain: string;
+  let path: string;
+
+  return new BluebirdPromise<[string, string]>(function (resolve, reject) {
+    const host = ObjectPath.get<Express.Request, string>(req, "headers.host");
+    domain = DomainExtractor.fromHostHeader(host);
+    path =
+      ObjectPath.get<Express.Request, string>(req, "headers.x-original-uri");
+    const authenticationMethod =
+      MethodCalculator.compute(vars.config.authentication_methods, domain);
+
+    if (authenticationMethod != "single_factor") {
+      reject(new Error("This domain is not protected with single factor. " +
+        "You cannot log in with basic authentication."));
+      return;
+    }
+
+    const base64Re = new RegExp("^Basic ((?:[A-Za-z0-9+/]{4})*" +
+      "(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?)$");
+    const isTokenValidBase64 = base64Re.test(authorizationHeader);
+
+    if (!isTokenValidBase64) {
+      reject(new Error("No valid base64 token found in the header"));
+      return;
+    }
+
+    const tokenMatches = authorizationHeader.match(base64Re);
+    const base64Token = tokenMatches[1];
+    const decodedToken = Buffer.from(base64Token, "base64").toString();
+    const splittedToken = decodedToken.split(":");
+
+    if (splittedToken.length != 2) {
+      reject(new Error(
+        "The authorization token is invalid. Expecting 'userid:password'"));
+      return;
+    }
+
+    username = splittedToken[0];
+    const password = splittedToken[1];
+    resolve([username, password]);
+  })
+    .then(function ([userid, password]) {
+      return vars.ldapAuthenticator.authenticate(userid, password);
+    })
+    .then(function (groupsAndEmails) {
+      groups = groupsAndEmails.groups;
+      return AccessControl(req, vars, domain, path, username, groups);
+    })
+    .then(function () {
+      return BluebirdPromise.resolve({
+        username: username,
+        groups: groups
+      });
+    })
+    .catch(function (err: Error) {
+      return BluebirdPromise.reject(
+        new Error("Unable to authenticate the user with basic auth. Cause: "
+          + err.message));
+    });
+}

server/src/lib/routes/verify/get_session_cookie.ts

@@ -0,0 +1,102 @@
+import Express = require("express");
+import BluebirdPromise = require("bluebird");
+import Util = require("util");
+import ObjectPath = require("object-path");
+
+import Exceptions = require("../../Exceptions");
+import { AppConfiguration } from "../../configuration/Configuration";
+import Constants = require("../../../../../shared/constants");
+import { DomainExtractor } from "../../utils/DomainExtractor";
+import { ServerVariables } from "../../ServerVariables";
+import { MethodCalculator } from "../../authentication/MethodCalculator";
+import { IRequestLogger } from "../../logging/IRequestLogger";
+import { AuthenticationSession }
+  from "../../../../types/AuthenticationSession";
+import { AuthenticationSessionHandler }
+  from "../../AuthenticationSessionHandler";
+import AccessControl from "./access_control";
+
+const FIRST_FACTOR_NOT_VALIDATED_MESSAGE = "First factor not yet validated";
+const SECOND_FACTOR_NOT_VALIDATED_MESSAGE = "Second factor not yet validated";
+
+function verify_inactivity(req: Express.Request,
+  authSession: AuthenticationSession,
+  configuration: AppConfiguration, logger: IRequestLogger)
+  : BluebirdPromise<void> {
+
+  // If inactivity is not specified, then inactivity timeout does not apply
+  if (!configuration.session.inactivity) {
+    return BluebirdPromise.resolve();
+  }
+
+  const lastActivityTime = authSession.last_activity_datetime;
+  const currentTime = new Date().getTime();
+  authSession.last_activity_datetime = currentTime;
+
+  const inactivityPeriodMs = currentTime - lastActivityTime;
+  logger.debug(req, "Inactivity period was %s s and max period was %s.",
+    inactivityPeriodMs / 1000, configuration.session.inactivity / 1000);
+  if (inactivityPeriodMs < configuration.session.inactivity) {
+    return BluebirdPromise.resolve();
+  }
+
+  logger.debug(req, "Session has been reset after too long inactivity period.");
+  AuthenticationSessionHandler.reset(req);
+  return BluebirdPromise.reject(new Error("Inactivity period exceeded."));
+}
+
+export default function (req: Express.Request, res: Express.Response,
+  vars: ServerVariables, authSession: AuthenticationSession)
+  : BluebirdPromise<{ username: string, groups: string[] }> {
+  let username: string;
+  let groups: string[];
+  let domain: string;
+  let path: string;
+
+  return new BluebirdPromise(function (resolve, reject) {
+    username = authSession.userid;
+    groups = authSession.groups;
+
+    if (!authSession.userid) {
+      reject(new Exceptions.AccessDeniedError(
+        Util.format("%s: %s.", FIRST_FACTOR_NOT_VALIDATED_MESSAGE,
+          "userid is missing")));
+      return;
+    }
+
+    const host = ObjectPath.get<Express.Request, string>(req, "headers.host");
+    path =
+      ObjectPath.get<Express.Request, string>(req, "headers.x-original-uri");
+
+    domain = DomainExtractor.fromHostHeader(host);
+    const authenticationMethod =
+      MethodCalculator.compute(vars.config.authentication_methods, domain);
+    vars.logger.debug(req, "domain=%s, path=%s, user=%s, groups=%s", domain,
+      path, username, groups.join(","));
+
+    if (!authSession.first_factor)
+      return reject(new Exceptions.AccessDeniedError(
+        Util.format("%s: %s.", FIRST_FACTOR_NOT_VALIDATED_MESSAGE,
+          "first factor is false")));
+
+    if (authenticationMethod == "two_factor" && !authSession.second_factor)
+      return reject(new Exceptions.AccessDeniedError(
+        Util.format("%s: %s.", SECOND_FACTOR_NOT_VALIDATED_MESSAGE,
+          "second factor is false")));
+
+    resolve();
+  })
+    .then(function () {
+      return AccessControl(req, vars, domain, path, username, groups);
+    })
+    .then(function () {
+      return verify_inactivity(req, authSession,
+        vars.config, vars.logger);
+    })
+    .then(function () {
+      return BluebirdPromise.resolve({
+        username: authSession.userid,
+        groups: authSession.groups
+      });
+    });
+}

server/test/routes/verify/get.test.ts

@@ -28,14 +28,17 @@ describe("test /api/verify endpoint", function () {
     };
     AuthenticationSessionHandler.reset(req as any);
     req.headers.host = "secret.example.com";
-    const s = ServerVariablesMockBuilder.build();
+    const s = ServerVariablesMockBuilder.build(true);
     mocks = s.mocks;
     vars = s.variables;
-    vars.config.authentication_methods.default_method = "two_factor";
-
     authSession = AuthenticationSessionHandler.get(req as any, vars.logger);
   });
 
+  describe("with session cookie", function () {
+    beforeEach(function () {
+      vars.config.authentication_methods.default_method = "two_factor";
+    });
+
     it("should be already authenticated", function () {
       mocks.accessController.isAccessAllowedMock.returns(true);
       authSession.first_factor = true;
@@ -142,7 +145,7 @@ describe("test /api/verify endpoint", function () {
       });
     });
 
-  describe("given user tries to access a basic auth endpoint", function () {
+    describe("given user tries to access a single factor endpoint", function () {
       beforeEach(function () {
         req.query = {
           redirect: "http://redirect.url"
@@ -215,5 +218,96 @@ describe("test /api/verify endpoint", function () {
           });
       });
     });
+  });
+
+  describe("with basic auth", function () {
+    it("should authenticate correctly", function () {
+      mocks.accessController.isAccessAllowedMock.returns(true);
+      mocks.config.authentication_methods.default_method = "single_factor";
+      mocks.ldapAuthenticator.authenticateStub.returns({
+        groups: ["mygroup", "othergroup"],
+      });
+      req.headers["proxy-authorization"] = "Basic am9objpwYXNzd29yZA==";
+
+      return VerifyGet.default(vars)(req as express.Request, res as any)
+        .then(function () {
+          Sinon.assert.calledWithExactly(res.setHeader, "Remote-User", "john");
+          Sinon.assert.calledWithExactly(res.setHeader, "Remote-Groups", "mygroup,othergroup");
+          Assert.equal(204, res.status.getCall(0).args[0]);
+        });
+    });
+
+    it("should fail when endpoint is protected by two factors", function () {
+      mocks.accessController.isAccessAllowedMock.returns(true);
+      mocks.config.authentication_methods.default_method = "single_factor";
+      mocks.config.authentication_methods.per_subdomain_methods = {
+        "secret.example.com": "two_factor"
+      };
+      mocks.ldapAuthenticator.authenticateStub.resolves({
+        groups: ["mygroup", "othergroup"],
+      });
+      req.headers["proxy-authorization"] = "Basic am9objpwYXNzd29yZA==";
+
+      return VerifyGet.default(vars)(req as express.Request, res as any)
+        .then(function () {
+          Assert(res.status.calledWithExactly(401));
+        });
+    });
+
+    it("should fail when base64 token is not valid", function () {
+      mocks.accessController.isAccessAllowedMock.returns(true);
+      mocks.config.authentication_methods.default_method = "single_factor";
+      mocks.ldapAuthenticator.authenticateStub.resolves({
+        groups: ["mygroup", "othergroup"],
+      });
+      req.headers["proxy-authorization"] = "Basic i_m*not_a_base64*token";
+
+      return VerifyGet.default(vars)(req as express.Request, res as any)
+        .then(function () {
+          Assert(res.status.calledWithExactly(401));
+        });
+    });
+
+    it("should fail when base64 token has not format user:psswd", function () {
+      mocks.accessController.isAccessAllowedMock.returns(true);
+      mocks.config.authentication_methods.default_method = "single_factor";
+      mocks.ldapAuthenticator.authenticateStub.resolves({
+        groups: ["mygroup", "othergroup"],
+      });
+      req.headers["proxy-authorization"] = "Basic am9objpwYXNzOmJhZA==";
+
+      return VerifyGet.default(vars)(req as express.Request, res as any)
+        .then(function () {
+          Assert(res.status.calledWithExactly(401));
+        });
+    });
+
+    it("should fail when bad user password is provided", function () {
+      mocks.accessController.isAccessAllowedMock.returns(true);
+      mocks.config.authentication_methods.default_method = "single_factor";
+      mocks.ldapAuthenticator.authenticateStub.rejects(new Error(
+        "Invalid credentials"));
+      req.headers["proxy-authorization"] = "Basic am9objpwYXNzd29yZA==";
+
+      return VerifyGet.default(vars)(req as express.Request, res as any)
+        .then(function () {
+          Assert(res.status.calledWithExactly(401));
+        });
+    });
+
+    it("should fail when resource is restricted", function () {
+      mocks.accessController.isAccessAllowedMock.returns(false);
+      mocks.config.authentication_methods.default_method = "single_factor";
+      mocks.ldapAuthenticator.authenticateStub.resolves({
+        groups: ["mygroup", "othergroup"],
+      });
+      req.headers["proxy-authorization"] = "Basic am9objpwYXNzd29yZA==";
+
+      return VerifyGet.default(vars)(req as express.Request, res as any)
+        .then(function () {
+          Assert(res.status.calledWithExactly(401));
+        });
+    });
+  });
 });
 

test/features/forward-headers.feature

@@ -4,3 +4,8 @@ Feature: User and groups headers are correctly forwarded to backend
     When I visit "https://public.test.local:8080/headers"
     Then I see header "Custom-Forwarded-User" set to "john"
     Then I see header "Custom-Forwarded-Groups" set to "dev,admin"
+
+  Scenario: Custom-Forwarded-User and Custom-Forwarded-Groups are correctly forwarded to protected backend when basic auth is used
+    When I request "https://single_factor.test.local:8080/headers" with username "john" and password "password" using basic authentication
+    Then I received header "Custom-Forwarded-User" set to "john"
+    And I received header "Custom-Forwarded-Groups" set to "dev,admin"

test/features/single-factor-domain.feature

@@ -1,13 +1,15 @@
 Feature: User can access certain subdomains with single factor
 
-  @need-registered-user-john
   Scenario: User is redirected to service after first factor if allowed
     When I visit "https://auth.test.local:8080/?redirect=https%3A%2F%2Fsingle_factor.test.local%3A8080%2Fsecret.html"
     And I login with user "john" and password "password"
     Then I'm redirected to "https://single_factor.test.local:8080/secret.html"
 
-  @need-registered-user-john
   Scenario: Redirection after first factor fails if single_factor not allowed. It redirects user to first factor.
     When I visit "https://auth.test.local:8080/?redirect=https%3A%2F%2Fadmin.test.local%3A8080%2Fsecret.html"
     And I login with user "john" and password "password"
     Then I'm redirected to "https://auth.test.local:8080/?redirect=https%3A%2F%2Fadmin.test.local%3A8080%2Fsecret.html"
+
+  Scenario: User can login using basic authentication
+    When I request "https://single_factor.test.local:8080/secret.html" with username "john" and password "password" using basic authentication
+    Then I receive the secret page

test/features/step_definitions/single-factor.ts

@@ -0,0 +1,39 @@
+import Cucumber = require("cucumber");
+import seleniumWebdriver = require("selenium-webdriver");
+import Request = require("request-promise");
+import BluebirdPromise = require("bluebird");
+import Util = require("util");
+
+Cucumber.defineSupportCode(function ({ Given, When, Then }) {
+  When("I request {stringInDoubleQuotes} with username {stringInDoubleQuotes}" +
+    " and password {stringInDoubleQuotes} using basic authentication",
+    function (url: string, username: string, password: string) {
+      const that = this;
+      return Request(url, {
+        auth: {
+          username: username,
+          password: password
+        },
+        resolveWithFullResponse: true
+      })
+        .then(function (response: any) {
+          that.response = response;
+        });
+    });
+
+  Then("I receive the secret page", function () {
+    if (this.response.body.match("This is a very important secret!"))
+      return BluebirdPromise.resolve();
+    return BluebirdPromise.reject(new Error("Secret page not received."));
+  });
+
+  Then("I received header {stringInDoubleQuotes} set to {stringInDoubleQuotes}",
+    function (expectedHeaderName: string, expectedValue: string) {
+      const expectedLine = Util.format("\"%s\": \"%s\"", expectedHeaderName,
+        expectedValue);
+      if (this.response.body.indexOf(expectedLine) > 0)
+        return BluebirdPromise.resolve();
+      return BluebirdPromise.reject(new Error(
+        Util.format("No such header or with unexpected value.")));
+    })
+});