Use @noble/curves for x25519 implementation.

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 ### Changed
 - **BREAKING**: Require node >= 18.
-- Use `@noble/ed25519` to provide X25519 implementation. This lib
+- Use `@noble/curves` to provide X25519 implementation. This lib
   is often used in other libs that are combined with this one and
   it has been through a comprehensive security audit. Additional
   benefits include speed and tree-shaking capabilities.

lib/algorithms/x25519-helper-browser.js

@@ -1,14 +1,14 @@
 /*!
- * Copyright (c) 2019-2022 Digital Bazaar, Inc. All rights reserved.
+ * Copyright (c) 2019-2023 Digital Bazaar, Inc. All rights reserved.
  */
 import * as base64url from 'base64url-universal';
 import crypto from '../crypto.js';
-import {curve25519} from '@noble/ed25519';
+import {x25519} from '@noble/curves/ed25519';
 
 export async function generateEphemeralKeyPair() {
   // generate X25519 ephemeral public key
   const privateKey = await crypto.getRandomValues(new Uint8Array(32));
-  const publicKey = curve25519.scalarMultBase(privateKey);
+  const publicKey = x25519.scalarMultBase(privateKey);
   return {
     privateKey,
     publicKey,
@@ -22,5 +22,5 @@ export async function generateEphemeralKeyPair() {
 
 export async function deriveSecret({privateKey, remotePublicKey}) {
   // `scalarMult` takes secret key as param 1, public key as param 2
-  return curve25519.scalarMult(privateKey, remotePublicKey);
+  return x25519.scalarMult(privateKey, remotePublicKey);
 }

package.json

@@ -23,7 +23,7 @@
     "lint": "eslint ."
   },
   "dependencies": {
-    "@noble/ed25519": "^1.6.1",
+    "@noble/curves": "^1.2.0",
     "@stablelib/chacha": "^1.0.1",
     "@stablelib/chacha20poly1305": "^1.0.1",
     "base58-universal": "^2.0.0",