From 04612f1705c88b30919c4ddb4fddf5d5f3da8eff Mon Sep 17 00:00:00 2001
From: Chris Duncan <chris@codecow.com>
Date: Tue, 30 Jun 2026 22:34:12 -0700
Subject: [PATCH] Narrow Blake2b input types.

---
 src/lib/crypto/blake2b.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/lib/crypto/blake2b.ts b/src/lib/crypto/blake2b.ts
index f9a9f07..d4526ac 100644
--- a/src/lib/crypto/blake2b.ts
+++ b/src/lib/crypto/blake2b.ts
@@ -228,7 +228,7 @@ export class Blake2b {
 		if (length < B.OUTBYTES_MIN || length > B.OUTBYTES_MAX) {
 			throw new RangeError(`length must be ${B.OUTBYTES_MIN}-${B.OUTBYTES_MAX} bytes`)
 		}
-		if (key != null) {
+		if (key !== undefined) {
 			if (!(key instanceof Uint8Array)) {
 				throw new TypeError(`key must be Uint8Array or Buffer`)
 			}
@@ -236,7 +236,7 @@ export class Blake2b {
 				throw new RangeError(`key must be ${B.KEYBYTES_MIN}-${B.KEYBYTES_MAX} bytes`)
 			}
 		}
-		if (salt != null) {
+		if (salt !== undefined) {
 			if (!(salt instanceof Uint8Array)) {
 				throw new TypeError(`salt must be Uint8Array or Buffer`)
 			}
@@ -244,7 +244,7 @@ export class Blake2b {
 				throw new RangeError(`salt must be ${B.SALTBYTES} bytes`)
 			}
 		}
-		if (personal != null) {
+		if (personal !== undefined) {
 			if (!(personal instanceof Uint8Array)) {
 				throw new TypeError(`personal must be Uint8Array or Buffer`)
 			}
-- 
2.52.0