[gnutls-devel] GnuTLS | tls13/key_update: Expose a manual KeyUpdate function (!1965)

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Alistair Francis started a new discussion on tests/handshake-write.c: https://gitlab.com/gnutls/gnutls/-/merge_requests/1965#note_2731512655

 >  	TRANSFER(client, server, MSG, strlen(MSG), buffer, MAX_BUF);
 >  	TRANSFER(server, client, MSG, strlen(MSG), buffer, MAX_BUF);
 >  
 > +	/* Trigger a KeyUpdate that won't actually be sent to the client,
 > +	 * as handshake_read_func() will drop the message.
 > +	 */
 > +	gnutls_session_key_update(server, GNUTLS_KU_PEER);
 > +
 > +	/* Manually update the client keys */
 > +	gnutls_handshake_update_receiving_key(client);

As a easy test if you comment this line out the test will fail as the key isn't updated on the client

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