- Returns: {Object}
Returns an object representing the type, name, and size of parameter of
an ephemeral key exchange in [perfect forward secrecy][] on a client
connection. It returns an empty object when the key exchange is not
ephemeral. As this is only supported on a client socket; null
is returned
if called on a server socket. The supported types are 'DH'
and 'ECDH'
. The
name
property is available only when type is 'ECDH'
.
For example: { type: 'ECDH', name: 'prime256v1', size: 256 }
.