method TLSSocket.prototype.getFinished
Usage in Deno
```typescript import { TLSSocket } from "node:node__tls.d.ts"; ```
TLSSocket.prototype.getFinished(): Buffer | undefined
As the `Finished` messages are message digests of the complete handshake
(with a total of 192 bits for TLS 1.0 and more for SSL 3.0), they can
be used for external authentication procedures when the authentication
provided by SSL/TLS is not desired or is not enough.
Corresponds to the `SSL_get_finished` routine in OpenSSL and may be used
to implement the `tls-unique` channel binding from [RFC 5929](https://tools.ietf.org/html/rfc5929).
Buffer | undefined
The latest `Finished` message that has been sent to the socket as part of a SSL/TLS handshake, or `undefined` if no `Finished` message has been sent yet.