function createPublicKey
Usage in Deno
```typescript import { createPublicKey } from "node:node__crypto.d.ts"; ```
createPublicKey(key: ): KeyObject
Creates and returns a new key object containing a public key. If `key` is a
string or `Buffer`, `format` is assumed to be `'pem'`; if `key` is a `KeyObject` with type `'private'`, the public key is derived from the given private key;
otherwise, `key` must be an object with the properties described above.
If the format is `'pem'`, the `'key'` may also be an X.509 certificate.
Because public keys can be derived from private keys, a private key may be
passed instead of a public key. In that case, this function behaves as if [createPrivateKey](../.././node__crypto.d.ts/~/createPrivateKey) had been called, except that the type of the
returned `KeyObject` will be `'public'` and that the private key cannot be
extracted from the returned `KeyObject`. Similarly, if a `KeyObject` with type `'private'` is given, a new `KeyObject` with type `'public'` will be returned
and it will be impossible to extract the private key from the returned object.