fix(ext/node): timingSafeEqual account for AB byteOffset (#26292)

Fixes https://github.com/denoland/deno/issues/26276

1 files changed, 9 insertions, 1 deletions

diff --git a/tests/unit_node/crypto/crypto_misc_test.ts b/tests/unit_node/crypto/crypto_misc_test.ts
index 47a48b1bf..007009339 100644
--- a/tests/unit_node/crypto/crypto_misc_test.ts
+++ b/tests/unit_node/crypto/crypto_misc_test.ts
@@ -1,5 +1,6 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-import { randomFillSync, randomUUID } from "node:crypto";
+import { randomFillSync, randomUUID, timingSafeEqual } from "node:crypto";
+import { Buffer } from "node:buffer";
 import { assert, assertEquals } from "../../unit/test_util.ts";
 import { assertNotEquals } from "@std/assert";
 
@@ -28,3 +29,10 @@ Deno.test("[node/crypto.randomFillSync] array buffer view", () => {
   assertEquals(buf.subarray(0, 8), new Uint8Array(8));
   assertEquals(buf.subarray(24, 32), new Uint8Array(8));
 });
+
+Deno.test("[node/crypto.timingSafeEqual] compares equal Buffer with different byteOffset", () => {
+  const a = Buffer.from([212, 213]);
+  const b = Buffer.from([0, 0, 0, 0, 0, 0, 0, 0, 212, 213]).subarray(8);
+
+  assert(timingSafeEqual(a, b));
+});