perf: use native node's base64url encoding when available

lib/helpers/base64url.js

@@ -1,26 +1,16 @@
-const b64uRegExp = /^[a-zA-Z0-9_-]*$/;
+let encode;
+let encodeBuffer;
+if (Buffer.isEncoding('base64url')) {
+  encode = (input, encoding = 'utf8') => Buffer.from(input, encoding).toString('base64url');
+  encodeBuffer = (buf) => buf.toString('base64url');
+} else {
+  const fromBase64 = (base64) => base64.replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_');
+  encode = (input, encoding = 'utf8') => fromBase64(Buffer.from(input, encoding).toString('base64'));
+  encodeBuffer = (buf) => fromBase64(buf.toString('base64'));
+}
 
-const fromBase64 = (base64) => base64.replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_');
-
-const toBase64 = (base64url) => base64url.replace(/-/g, '+').replace(/_/g, '/');
-
-const encode = (input, encoding = 'utf8') => fromBase64(Buffer.from(input, encoding).toString('base64'));
-
-const encodeBuffer = (buf) => fromBase64(buf.toString('base64'));
-
-const decode = (input) => {
-  if (!b64uRegExp.test(input)) {
-    throw new TypeError('input is not a valid base64url encoded string');
-  }
-  return Buffer.from(toBase64(input), 'base64').toString('utf8');
-};
-
-const decodeToBuffer = (input) => {
-  if (!b64uRegExp.test(input)) {
-    throw new TypeError('input is not a valid base64url encoded string');
-  }
-  return Buffer.from(toBase64(input), 'base64');
-};
+const decode = (input) => Buffer.from(input, 'base64').toString('utf8');
+const decodeToBuffer = (input) => Buffer.from(input, 'base64');
 
 module.exports.decode = decode;
 module.exports.decodeToBuffer = decodeToBuffer;

package.json

@@ -55,14 +55,14 @@
     "debug": "^4.1.1",
     "ejs": "^3.1.5",
     "got": "^9.6.0",
-    "jose": "^2.0.2",
+    "jose": "^2.0.4",
     "jsesc": "^3.0.1",
     "koa": "^2.13.0",
     "koa-compose": "^4.1.0",
     "lru-cache": "^6.0.0",
     "nanoid": "^3.1.10",
     "object-hash": "^2.0.3",
-    "oidc-token-hash": "^5.0.0",
+    "oidc-token-hash": "^5.0.1",
     "raw-body": "^2.4.1"
   },
   "devDependencies": {