Webhooks

import crypto from "node:crypto";

export function verify(rawBody, header, secret, toleranceSec = 300) {
  const parts = Object.fromEntries(header.split(",").map((p) => p.split("=")));
  const t = Number(parts.t);
  if (!t || Math.abs(Date.now() / 1000 - t) > toleranceSec) return false;
  const expected = crypto.createHmac("sha256", secret).update(`${t}.${rawBody}`).digest("hex");
  const given = Buffer.from(parts.v1 ?? "", "hex");
  const want = Buffer.from(expected, "hex");
  return given.length === want.length && crypto.timingSafeEqual(given, want);
}

import hashlib, hmac, time

def verify(raw_body: bytes, header: str, secret: str, tolerance_sec: int = 300) -> bool:
    parts = dict(p.split("=", 1) for p in header.split(","))
    t = int(parts.get("t", "0"))
    if not t or abs(time.time() - t) > tolerance_sec:
        return False
    expected = hmac.new(secret.encode(), f"{t}.".encode() + raw_body, hashlib.sha256).hexdigest()
    return hmac.compare_digest(expected, parts.get("v1", ""))