From bd4552224382ff5236264fa88663f5c557d063e3 Mon Sep 17 00:00:00 2001
From: Durran Jordan <durran@gmail.com>
Date: Tue, 8 Feb 2022 14:48:21 +0100
Subject: [PATCH] test(NODE-3351): accept gssapiCanonicalizeHostName

---
 src/cmap/auth/mongo_credentials.ts |  5 +++++
 test/manual/kerberos.test.js       | 24 ++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/src/cmap/auth/mongo_credentials.ts b/src/cmap/auth/mongo_credentials.ts
index 6f0e453ed3..096f2180da 100644
--- a/src/cmap/auth/mongo_credentials.ts
+++ b/src/cmap/auth/mongo_credentials.ts
@@ -89,6 +89,11 @@ export class MongoCredentials {
       }
     }
 
+    if ('gssapiCanonicalizeHostName' in this.mechanismProperties) {
+      this.mechanismProperties.CANONICALIZE_HOST_NAME =
+        this.mechanismProperties.gssapiCanonicalizeHostName;
+    }
+
     Object.freeze(this.mechanismProperties);
     Object.freeze(this);
   }
diff --git a/test/manual/kerberos.test.js b/test/manual/kerberos.test.js
index f792a7f8a2..45b8f59add 100644
--- a/test/manual/kerberos.test.js
+++ b/test/manual/kerberos.test.js
@@ -1,6 +1,8 @@
 'use strict';
 const { MongoClient } = require('../../src');
 const chai = require('chai');
+const sinon = require('sinon');
+const dns = require('dns');
 
 const expect = chai.expect;
 
@@ -23,6 +25,16 @@ function verifyKerberosAuthentication(client, done) {
 }
 
 describe('Kerberos', function () {
+  const sandbox = sinon.createSandbox();
+
+  beforeEach(function () {
+    sandbox.spy(dns);
+  });
+
+  afterEach(function () {
+    sandbox.restore();
+  });
+
   if (process.env.MONGODB_URI == null) {
     console.error('skipping Kerberos tests, MONGODB_URI environment variable is not defined');
     return;
@@ -51,12 +63,24 @@ describe('Kerberos', function () {
     });
   });
 
+  it('validate that gssapiCanonicalizeHostName can be passed in', function (done) {
+    const client = new MongoClient(
+      `${krb5Uri}&authMechanismProperties=SERVICE_NAME:mongodb,gssapiCanonicalizeHostName:true&maxPoolSize=1`
+    );
+    client.connect(function (err, client) {
+      if (err) return done(err);
+      expect(dns.resolveCname.calledOnce);
+      verifyKerberosAuthentication(client, done);
+    });
+  });
+
   it('validate that CANONICALIZE_HOST_NAME can be passed in', function (done) {
     const client = new MongoClient(
       `${krb5Uri}&authMechanismProperties=SERVICE_NAME:mongodb,CANONICALIZE_HOST_NAME:true&maxPoolSize=1`
     );
     client.connect(function (err, client) {
       if (err) return done(err);
+      expect(dns.resolveCname.calledOnce);
       verifyKerberosAuthentication(client, done);
     });
   });