From 152425a366f744490206e596e7b2ada37796577c Mon Sep 17 00:00:00 2001
From: Bailey Pearson <bailey.pearson@mongodb.com>
Date: Tue, 20 Jun 2023 13:43:22 -0600
Subject: [PATCH] fix(NODE-5355): prevent error when saslprep is not a function
 (#3733)

---
 lib/core/auth/scram.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/core/auth/scram.js b/lib/core/auth/scram.js
index 2d1787810c..e561b32336 100644
--- a/lib/core/auth/scram.js
+++ b/lib/core/auth/scram.js
@@ -25,7 +25,7 @@ class ScramSHA extends AuthProvider {
 
   prepare(handshakeDoc, authContext, callback) {
     const cryptoMethod = this.cryptoMethod;
-    if (cryptoMethod === 'sha256' && saslprep == null) {
+    if (cryptoMethod === 'sha256' && typeof saslprep !== 'function') {
       emitWarningOnce('Warning: no saslprep library specified. Passwords will not be sanitized');
     }
 
@@ -125,7 +125,7 @@ function continueScramConversation(cryptoMethod, response, authContext, callback
 
   let processedPassword;
   if (cryptoMethod === 'sha256') {
-    processedPassword = saslprep ? saslprep(password) : password;
+    processedPassword = typeof saslprep === 'function' ? saslprep(password) : password;
   } else {
     try {
       processedPassword = passwordDigest(username, password);