From 123188ae7676e99e3303fbe8098d07b5ecbf1c56 Mon Sep 17 00:00:00 2001
From: leandrogilcarrano <leandro.gil@mulesoft.com>
Date: Fri, 31 May 2024 15:30:23 -0300
Subject: [PATCH] feat: fix util generate code challenge

---
 src/Utils.js              | 2 +-
 test/oauth2/ServerMock.js | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Utils.js b/src/Utils.js
index 0708258..5cb54c4 100644
--- a/src/Utils.js
+++ b/src/Utils.js
@@ -98,7 +98,7 @@ export async function sha256(value) {
  * @returns
  */
 export function base64Buffer(buffer) {
-  return btoa(String.fromCharCode.apply(null, new Uint8Array(buffer))); // .replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
+  return btoa(String.fromCharCode.apply(null, new Uint8Array(buffer))).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
 }
 
 /**
diff --git a/test/oauth2/ServerMock.js b/test/oauth2/ServerMock.js
index 59fe1c0..75945d3 100644
--- a/test/oauth2/ServerMock.js
+++ b/test/oauth2/ServerMock.js
@@ -184,7 +184,7 @@ module.exports.CodeServerMock = {
     const secret = params.get('client_secret');
     const verifier = params.get('code_verifier');
     const verifierSettings = codeChallenges[code];
-    const challenge = verifier && verifierSettings ? crypto.createHash('sha256').update(verifier).digest('base64') : undefined;
+    const challenge = verifier && verifierSettings ? crypto.createHash('sha256').update(verifier).digest('base64').replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '')  : undefined;
 
     if (params.get('grant_type') !== 'authorization_code') {
       result.set('error', 'invalid_grant');