From 2fa30b8aba9e1fa24782629e6f2c0e9121603c43 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kat=20March=C3=A1n?= <kzm@sykosomatic.org>
Date: Fri, 16 Feb 2018 14:35:52 -0800
Subject: [PATCH] fix(hashes): filter hash priority list by available hashes

---
 index.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 8527433..5418256 100644
--- a/index.js
+++ b/index.js
@@ -331,6 +331,8 @@ function createIntegrity (opts) {
   }
 }
 
+const NODE_HASHES = new Set(crypto.getHashes())
+
 // This is a Best Effort™ at a reasonable priority for hash algos
 const DEFAULT_PRIORITY = [
   'md5', 'whirlpool', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512',
@@ -339,7 +341,8 @@ const DEFAULT_PRIORITY = [
   'sha3',
   'sha3-256', 'sha3-384', 'sha3-512',
   'sha3_256', 'sha3_384', 'sha3_512'
-]
+].filter(algo => NODE_HASHES.has(algo))
+
 function getPrioritizedHash (algo1, algo2) {
   return DEFAULT_PRIORITY.indexOf(algo1.toLowerCase()) >= DEFAULT_PRIORITY.indexOf(algo2.toLowerCase())
   ? algo1