thankfulTurquoiseParrot

Create val
import { ValSession } from "https://esm.town/v/maxm/valSession";

// Generate a token from your valtown api key.
const token = await ValSession.newSession(Deno.env.get("valtown"));

// Other services can use it to authenticate
const user = await ValSession.validate(token);

Fork it, provide your own VT_SESSION_PRIVATE_KEY, and update the hardcoded public key. You can generate your own keys like so:

Create val
import { crypto } from "https://deno.land/std@0.198.0/crypto/mod.ts";
// Generate a key pair for JWT signing and verification
const { privateKey, publicKey } = await crypto.subtle.generateKey(
  {
    name: "RSASSA-PKCS1-v1_5",
    modulusLength: 2048,
    publicExponent: new Uint8Array([1, 0, 1]),
    hash: "SHA-256",
  }, true, ["sign", "verify"],
);

function formatPEM(b64: string, type: "PRIVATE KEY" | "PUBLIC KEY"): string {
  const lines = b64.match(/.{1,64}/g) || [];
  return `-----BEGIN ${type}-----\n${lines.join("\n")}\n-----END ${type}-----`;
}

const privateKeyPem = formatPEM(
  btoa(String.fromCharCode(...new Uint8Array(exportPrivateKey))),
  "PRIVATE KEY",
);
const publicKeyPem = formatPEM(
  btoa(String.fromCharCode(...new Uint8Array(exportPublicKey))),
  "PUBLIC KEY",
);

console.log(privateKeyPem, publicKeyPem);