From 6c663f89c8931c01df4a7f7e1c01200ef85b09ca Mon Sep 17 00:00:00 2001
From: Dave Longley <dlongley@digitalbazaar.com>
Date: Wed, 8 Oct 2025 13:48:25 -0400
Subject: [PATCH 1/2] Eliminate dependencies.

---
 CHANGELOG.md        |  9 +++++++++
 lib/httpDigest.js   |  3 +--
 lib/util-browser.js | 19 +++++++++++++++++++
 lib/util.js         | 10 ++++++++++
 package.json        |  7 +++----
 5 files changed, 42 insertions(+), 6 deletions(-)
 create mode 100644 lib/util-browser.js
 create mode 100644 lib/util.js

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 95ab178..60f26b9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # @digitalbazaar/http-digest-header Changelog
 
+## 2.2.0 - 2025-10-dd
+
+### Changed
+- Eliminate dependencies in favor of native platform support for simple
+  (and rarely used) polyfill fallbacks which may be removed in future
+  versions. Dependencies removed:
+  - `@digitalbazaar/base64url-universal`
+  - `js-base64`.
+
 ## 2.1.0 - 2025-10-07
 
 ### Added
diff --git a/lib/httpDigest.js b/lib/httpDigest.js
index bc8ff47..c6550e8 100644
--- a/lib/httpDigest.js
+++ b/lib/httpDigest.js
@@ -1,8 +1,7 @@
 /*!
  * Copyright (c) 2019-2025 Digital Bazaar, Inc. All rights reserved.
  */
-import {fromUint8Array as base64Encode} from 'js-base64';
-import {encode as base64urlEncode} from 'base64url-universal';
+import {base64Encode, base64urlEncode} from './util.js';
 
 const {crypto} = globalThis;
 
diff --git a/lib/util-browser.js b/lib/util-browser.js
new file mode 100644
index 0000000..6dacf1b
--- /dev/null
+++ b/lib/util-browser.js
@@ -0,0 +1,19 @@
+/*!
+ * Copyright (c) 2021-2025 Digital Bazaar, Inc. All rights reserved.
+ */
+export function base64Encode(bytes) {
+  if(bytes.toBase64) {
+    return bytes.toBase64();
+  }
+  return btoa(Array.from(bytes, b => String.fromCodePoint(b)).join(''));
+}
+
+export function base64urlEncode(bytes) {
+  if(bytes.toBase64) {
+    return bytes.toBase64({alphabet: 'base64url', omitPadding: true});
+  }
+  return base64Encode(bytes)
+    .replace(/\+/g, '-')
+    .replace(/\//g, '_')
+    .replaceAll('=', '');
+}
diff --git a/lib/util.js b/lib/util.js
new file mode 100644
index 0000000..c524a16
--- /dev/null
+++ b/lib/util.js
@@ -0,0 +1,10 @@
+/*!
+ * Copyright (c) 2021-2025 Digital Bazaar, Inc. All rights reserved.
+ */
+export function base64Encode(bytes) {
+  return Buffer.from(bytes).toString('base64');
+}
+
+export function base64urlEncode(bytes) {
+  return Buffer.from(bytes).toString('base64url');
+}
diff --git a/package.json b/package.json
index 2318e27..32b8d68 100644
--- a/package.json
+++ b/package.json
@@ -14,13 +14,12 @@
   },
   "type": "module",
   "exports": "./lib/index.js",
+  "browser": {
+    "./lib/util.js": "./lib/util-browser.js"
+  },
   "files": [
     "lib/**/*.js"
   ],
-  "dependencies": {
-    "base64url-universal": "^2.0.0",
-    "js-base64": "^3.7.2"
-  },
   "devDependencies": {
     "c8": "^10.1.3",
     "chai": "^4.3.6",

From 9ca8f23e5ce5d5cf1b3f4af8295ea86fa2434952 Mon Sep 17 00:00:00 2001
From: Dave Longley <dlongley@digitalbazaar.com>
Date: Wed, 8 Oct 2025 14:09:43 -0400
Subject: [PATCH 2/2] Fix changelog entry.

---
 CHANGELOG.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 60f26b9..4c1cc62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@
 - Eliminate dependencies in favor of native platform support for simple
   (and rarely used) polyfill fallbacks which may be removed in future
   versions. Dependencies removed:
-  - `@digitalbazaar/base64url-universal`
+  - `base64url-universal`
   - `js-base64`.
 
 ## 2.1.0 - 2025-10-07