Merge pull request #331 from fmoessbauer/master

document scalar clamping of curve25519 keys
meshtastic · Nov 10, 2024 · 443c7fc · 443c7fc
2 parents 6138d9f + 79c5638
commit 443c7fc
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/core/utils/x25519.ts b/src/core/utils/x25519.ts
@@ -3,6 +3,8 @@ import { x25519 } from "@noble/curves/ed25519";
 export function getX25519PrivateKey(): Uint8Array {
   const key = x25519.utils.randomPrivateKey();
 
+  // scalar clamping for curve25519, according to
+  // https://www.rfc-editor.org/rfc/rfc7748#section-5
   key[0] &= 248;
   key[31] &= 127;
   key[31] |= 64;