31 lines
806 B
TypeScript
31 lines
806 B
TypeScript
import { createPublicKey, verify } from "crypto";
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function getPublicKey() {
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const b64 = process.env.LICENSE_PUBLIC_KEY;
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if (!b64) throw createError({ statusCode: 500, message: "License system not configured" });
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return createPublicKey({
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key: Buffer.from(b64, "base64"),
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format: "der",
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type: "spki",
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});
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}
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export function verifyLicenseKey(key: string): boolean {
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try {
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const pubKey = getPublicKey();
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const now = Math.floor(Date.now() / 1000 / 300);
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const sig = Buffer.from(key, "base64url");
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// accept current window and the one before (edge case tolerance)
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for (const window of [now, now - 1]) {
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const msg = Buffer.from(String(window));
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if (verify(null, msg, pubKey, sig)) return true;
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}
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return false;
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} catch {
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return false;
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}
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}
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