Edits history of script submission #280 for ' Verify a license key (helper)'

• deno

  Edit in Windmill

  Embed

  import * as wmill from "https://deno.land/x/windmill@v1.60.0/mod.ts";
  
  // licenseKey generated by https://hub.windmill.dev/scripts/helper/1508/generate-a-license-key-using-rsa-pss-for-a-customer-helper
  export async function main(licenseKey: string) {
    const [client, signature] = licenseKey.split('.')
    const data = new TextEncoder().encode(atob(client))
    const signatureAb = Uint8Array.from(atob(signature), c => c.charCodeAt(0))
  
    // publicKey generated by https://hub.windmill.dev/scripts/helper/1509/generate-an-rsa-pss-key-pair-helper
    let publicKey = await importPublicKey(
      (await wmill.getVariable("u/user/public_license_key"))!,
    );
    let verified = await crypto.subtle.verify(
      {
        name: "RSA-PSS",
        saltLength: 32,
      },
      publicKey,
      signatureAb,
      data
    );
  
    return verified;
  }
  
  function importPublicKey(pem: string) {
    const binaryDerString = window.atob(pem);
    const binaryDer = str2ab(binaryDerString);
  
    return window.crypto.subtle.importKey(
      "spki",
      binaryDer,
      {
        name: "RSA-PSS",
        hash: "SHA-256",
      },
      true,
      ["verify"],
    );
  }
  
  function str2ab(str: string) {
    const buf = new ArrayBuffer(str.length);
    const bufView = new Uint8Array(buf);
    for (let i = 0, strLen = str.length; i < strLen; i++) {
      bufView[i] = str.charCodeAt(i);
    }
    return buf;
  }
  

  Submitted by admin 475 days ago