From 3ef65e45d720f70ab5e19dc76226969a0d76d0ab Mon Sep 17 00:00:00 2001
From: rmg-x <git@rmgx.io>
Date: Sat, 16 Aug 2025 10:35:02 -0500
Subject: [PATCH] LibWeb/Crypto: Avoid heap allocation for AesGcm tag lengths

---
 Libraries/LibWeb/Crypto/CryptoAlgorithms.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Libraries/LibWeb/Crypto/CryptoAlgorithms.cpp b/Libraries/LibWeb/Crypto/CryptoAlgorithms.cpp
index fc2ad5af087..8c6e83119dc 100644
--- a/Libraries/LibWeb/Crypto/CryptoAlgorithms.cpp
+++ b/Libraries/LibWeb/Crypto/CryptoAlgorithms.cpp
@@ -3156,12 +3156,12 @@ WebIDL::ExceptionOr<GC::Ref<JS::ArrayBuffer>> AesGcm::encrypt(AlgorithmParams co
 
     // 4. If the tagLength member of normalizedAlgorithm is not present: Let tagLength be 128.
     auto tag_length = 0;
-    auto to_compare_against = Vector<int> { 32, 64, 96, 104, 112, 120, 128 };
+    auto constexpr valid_tag_lengths = Array { 32, 64, 96, 104, 112, 120, 128 };
     if (!normalized_algorithm.tag_length.has_value())
         tag_length = 128;
 
     // If the tagLength member of normalizedAlgorithm is one of 32, 64, 96, 104, 112, 120 or 128: Let tagLength be equal to the tagLength member of normalizedAlgorithm
-    else if (to_compare_against.contains_slow(normalized_algorithm.tag_length.value()))
+    else if (valid_tag_lengths.contains_slow(normalized_algorithm.tag_length.value()))
         tag_length = normalized_algorithm.tag_length.value();
 
     // Otherwise: throw an OperationError.
@@ -3198,12 +3198,12 @@ WebIDL::ExceptionOr<GC::Ref<JS::ArrayBuffer>> AesGcm::decrypt(AlgorithmParams co
 
     // 1. If the tagLength member of normalizedAlgorithm is not present: Let tagLength be 128.
     u32 tag_length = 0;
-    auto to_compare_against = Vector<u32> { 32, 64, 96, 104, 112, 120, 128 };
+    auto constexpr valid_tag_lengths = Array { 32, 64, 96, 104, 112, 120, 128 };
     if (!normalized_algorithm.tag_length.has_value())
         tag_length = 128;
 
     // If the tagLength member of normalizedAlgorithm is one of 32, 64, 96, 104, 112, 120 or 128: Let tagLength be equal to the tagLength member of normalizedAlgorithm
-    else if (to_compare_against.contains_slow(normalized_algorithm.tag_length.value()))
+    else if (valid_tag_lengths.contains_slow(normalized_algorithm.tag_length.value()))
         tag_length = normalized_algorithm.tag_length.value();
 
     // Otherwise: throw an OperationError.