From 0ef92c6c09fabe69eb99b0bc3aea8aba3db27faf Mon Sep 17 00:00:00 2001
From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Mon, 20 Sep 2021 09:46:49 +0200
Subject: [PATCH] Credentials: Fix a possible overflow with a very large work
 factor

Reported by Coverity as CID 1462395.
---
 pdns/credentials.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pdns/credentials.cc b/pdns/credentials.cc
index 2cefba2a17..f2f882db2c 100644
--- a/pdns/credentials.cc
+++ b/pdns/credentials.cc
@@ -234,7 +234,7 @@ static void parseHashed(const std::string& hash, std::string& salt, std::string&
 
   try {
     workFactor = pdns_stou(parameters.at(0).substr(3));
-    workFactor = 1 << workFactor;
+    workFactor = static_cast<uint64_t>(1) << workFactor;
     if (workFactor > pwhash_max_work_factor) {
       throw std::runtime_error("Invalid work factor of " + std::to_string(workFactor) + " in hashed password string, maximum is " + std::to_string(pwhash_max_work_factor));
     }
-- 
2.47.2