class Certificate
Usage in Deno
```typescript import { Certificate } from "node:node__crypto.d.ts"; ```> [!WARNING] Deno compatibility
> The methods are non-functional stubs.
SPKAC is a Certificate Signing Request mechanism originally implemented by
Netscape and was specified formally as part of HTML5's `keygen` element.
`` is deprecated since [HTML 5.2](https://www.w3.org/TR/html52/changes.html#features-removed) and new projects
should not use this element anymore.
The `node:crypto` module provides the `Certificate` class for working with SPKAC
data. The most common usage is handling output generated by the HTML5 `` element. Node.js uses [OpenSSL's SPKAC
implementation](https://www.openssl.org/docs/man3.0/man1/openssl-spkac.html) internally.
deprecated
exportChallenge(spkac: BinaryLike): Buffer
deprecated
exportPublicKey(spkac: BinaryLike,encoding?: string,): Buffer
deprecated
verifySpkac(spkac: ArrayBufferView): boolean
exportChallenge(spkac: BinaryLike): Buffer
```js
const { Certificate } = await import('node:crypto');
const spkac = getSpkacSomehow();
const challenge = Certificate.exportChallenge(spkac);
console.log(challenge.toString('utf8'));
// Prints: the challenge as a UTF8 string
```
exportPublicKey(spkac: BinaryLike,encoding?: string,): Buffer
```js
const { Certificate } = await import('node:crypto');
const spkac = getSpkacSomehow();
const publicKey = Certificate.exportPublicKey(spkac);
console.log(publicKey);
// Prints: the public key as
```
verifySpkac(spkac: ArrayBufferView): boolean
```js
import { Buffer } from 'node:buffer';
const { Certificate } = await import('node:crypto');
const spkac = getSpkacSomehow();
console.log(Certificate.verifySpkac(Buffer.from(spkac)));
// Prints: true or false
```