From 87a30e2e9b05c4d157e735ba4a7272c0702c3f1e Mon Sep 17 00:00:00 2001
From: Friedel Ziegelmayer <dignifiedquire@gmail.com>
Date: Fri, 20 May 2016 16:27:11 +0200
Subject: [PATCH] fix: workaround missing sha512 support in forge.hmac

---
 src/key-stretcher.js       | 3 ++-
 test/key-stretcher.spec.js | 3 +--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/key-stretcher.js b/src/key-stretcher.js
index 7aa918b..07713b9 100644
--- a/src/key-stretcher.js
+++ b/src/key-stretcher.js
@@ -21,7 +21,8 @@ const cipherMap = {
 const hashMap = {
   SHA1: 'sha1',
   SHA256: 'sha256',
-  SHA512: 'sha512'
+  // workaround for https://github.com/digitalbazaar/forge/issues/401
+  SHA512: forge.md.sha512.create()
 }
 
 // Generates a set of keys for each party by stretching the shared key.
diff --git a/test/key-stretcher.spec.js b/test/key-stretcher.spec.js
index 2861bba..26756d8 100644
--- a/test/key-stretcher.spec.js
+++ b/test/key-stretcher.spec.js
@@ -9,8 +9,7 @@ const fixtures = require('./fixtures/go-stretch-key')
 describe('keyStretcher', () => {
   describe('generate', () => {
     const ciphers = ['AES-128', 'AES-256', 'Blowfish']
-    const hashes = ['SHA1', 'SHA256']
-    // add 'SHA512' when https://github.com/digitalbazaar/forge/issues/401 is resolved
+    const hashes = ['SHA1', 'SHA256', 'SHA512']
     const res = crypto.generateEphemeralKeyPair('P-256')
     const secret = res.genSharedKey(res.key)