feature: User Lockout (parse-community#4749)

* Allows masterKey to lock _User object and prevent login with email / password

* Ensure the authData based auth can be locked out as well when accounts is masterKey only

Author: flovilmart

spec/ParseUser.spec.js

@@ -213,6 +213,71 @@ describe('Parse.User testing', () => {
     })
   });
 
+  it('should let masterKey lockout user', (done) => {
+    const user = new Parse.User();
+    const ACL = new Parse.ACL();
+    ACL.setPublicReadAccess(false);
+    ACL.setPublicWriteAccess(false);
+    user.setUsername('asdf');
+    user.setPassword('zxcv');
+    user.setACL(ACL);
+    user.signUp().then(() => {
+      return Parse.User.logIn("asdf", "zxcv");
+    }).then((user) => {
+      equal(user.get("username"), "asdf");
+      // Lock the user down
+      const ACL = new Parse.ACL();
+      user.setACL(ACL);
+      return user.save(null, { useMasterKey: true });
+    }).then(() => {
+      expect(user.getACL().getPublicReadAccess()).toBe(false);
+      return Parse.User.logIn("asdf", "zxcv");
+    }).then(done.fail).catch((err) => {
+      expect(err.message).toBe('Invalid username/password.');
+      expect(err.code).toBe(Parse.Error.OBJECT_NOT_FOUND);
+      done();
+    });
+  });
+
+  it('should be let masterKey lock user out with authData', (done) => {
+    let objectId;
+    let sessionToken;
+
+    rp.post({
+      url: 'http://localhost:8378/1/classes/_User',
+      headers: {
+        'X-Parse-Application-Id': Parse.applicationId,
+        'X-Parse-REST-API-Key': 'rest',
+      },
+      json: { key: "value", authData: {anonymous: {id: '00000000-0000-0000-0000-000000000001'}}}
+    }).then((body) => {
+      objectId = body.objectId;
+      sessionToken = body.sessionToken;
+      expect(sessionToken).toBeDefined();
+      expect(objectId).toBeDefined();
+      const user = new Parse.User();
+      user.id = objectId;
+      const ACL = new Parse.ACL();
+      user.setACL(ACL);
+      return user.save(null, { useMasterKey: true });
+    }).then(() => {
+      // update the user
+      const options = {
+        url: `http://localhost:8378/1/classes/_User/`,
+        headers: {
+          'X-Parse-Application-Id': Parse.applicationId,
+          'X-Parse-REST-API-Key': 'rest',
+        },
+        json: { key: "otherValue", authData: {anonymous: {id: '00000000-0000-0000-0000-000000000001'}}}
+      }
+      return rp.post(options);
+    }).then((res) => {
+      // Because the user is locked out, this should behave as creating a new user
+      expect(res.objectId).not.toEqual(objectId);
+    }).then(done)
+      .catch(done.fail);
+  });
+
   it("user login with files", (done) => {
     const file = new Parse.File("yolo.txt", [1,2,3], "text/plain");
     file.save().then((file) => {

src/RestWrite.js

@@ -282,7 +282,9 @@ RestWrite.prototype.findUsersWithAuthData = function(authData) {
 RestWrite.prototype.handleAuthData = function(authData) {
   let results;
   return this.findUsersWithAuthData(authData).then((r) => {
-    results = r;
+    results = r.filter((user) => {
+      return !this.auth.isMaster && user.ACL && Object.keys(user.ACL).length > 0;
+    });
     if (results.length > 1) {
       // More than 1 user with the passed id's
       throw new Parse.Error(Parse.Error.ACCOUNT_ALREADY_LINKED,
@@ -980,7 +982,7 @@ RestWrite.prototype.runDatabaseOperation = function() {
   if (this.query) {
     // Force the user to not lockout
     // Matched with parse.com
-    if (this.className === '_User' && this.data.ACL) {
+    if (this.className === '_User' && this.data.ACL && this.auth.isMaster !== true) {
       this.data.ACL[this.query.objectId] = { read: true, write: true };
     }
     // update password timestamp if user password is being changed

src/Routers/UsersRouter.js

@@ -114,6 +114,12 @@ export class UsersRouter extends ClassesRouter {
         if (!isValidPassword) {
           throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, 'Invalid username/password.');
         }
+        // Ensure the user isn't locked out
+        // A locked out user won't be able to login
+        // To lock a user out, just set the ACL to `masterKey` only  ({}).
+        if (!req.auth.isMaster && (!user.ACL || Object.keys(user.ACL).length == 0)) {
+          throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, 'Invalid username/password.');
+        }
         if (req.config.verifyUserEmails && req.config.preventLoginWithUnverifiedEmail && !user.emailVerified) {
           throw new Parse.Error(Parse.Error.EMAIL_NOT_FOUND, 'User email is not verified.');
         }