From 4d9aaa261900a65663b8356724cd946979330932 Mon Sep 17 00:00:00 2001
From: Pascal Perrenoud <pascal@pband.ch>
Date: Thu, 6 Jun 2024 01:50:26 +0200
Subject: [PATCH] Implement signature

---
 src/signature.ts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 src/signature.ts

diff --git a/src/signature.ts b/src/signature.ts
new file mode 100644
index 0000000..e2abae2
--- /dev/null
+++ b/src/signature.ts
@@ -0,0 +1,21 @@
+import logger from 'log'
+import * as ed from '@noble/ed25519'
+
+const log = logger('crypto:signature')
+
+export async function gen_privkey() : Promise<Uint8Array> {
+    log.trace("generate keypair")
+    return ed.utils.randomPrivateKey()
+}
+export async function get_pubkey(privkey: Uint8Array) : Promise<Uint8Array> {
+    log.trace("derive pubky")
+    return ed.getPublicKeyAsync(privkey)
+}
+export async function sign(message: Uint8Array, privkey: Uint8Array) : Promise<Uint8Array> {
+    log.trace("sign")
+    return ed.signAsync(message, privkey)
+}
+export async function verify(message: Uint8Array, pubkey: Uint8Array, signature: Uint8Array) : Promise<boolean> {
+    log.trace("verify")
+    return ed.verifyAsync(signature, message, pubkey)
+}