From 36a56871c04e77b088847cf9d51becfd8c032904 Mon Sep 17 00:00:00 2001
From: DexesTTP <dexes.ttp@gmail.com>
Date: Fri, 14 May 2021 09:46:41 +0200
Subject: [PATCH] LibCrypto: Prevent a signed overflow during BigInt Modular
 Power

The algorithm isn't explicit about what type this needs to be. But this
passes all of the tests, so that's probably fine.
---
 .../Libraries/LibCrypto/BigInt/Algorithms/ModularPower.cpp  | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Userland/Libraries/LibCrypto/BigInt/Algorithms/ModularPower.cpp b/Userland/Libraries/LibCrypto/BigInt/Algorithms/ModularPower.cpp
index 15dca5a721..258f96b750 100644
--- a/Userland/Libraries/LibCrypto/BigInt/Algorithms/ModularPower.cpp
+++ b/Userland/Libraries/LibCrypto/BigInt/Algorithms/ModularPower.cpp
@@ -58,9 +58,9 @@ ALWAYS_INLINE static u32 inverse_wrapped(u32 value)
 {
     VERIFY(value & 1);
 
-    i64 b = static_cast<i64>(value);
-    i64 k0 = (2 - b);
-    i64 t = (b - 1);
+    u64 b = static_cast<u64>(value);
+    u64 k0 = (2 - b);
+    u64 t = (b - 1);
     size_t i = 1;
     while (i < 32) {
         t = t * t;