Function server_secure_handshake_finalize 

pub fn server_secure_handshake_finalize(
    state: ServerHandshakeState,
    nonce_verification: [u8; 32],
) -> Result<[u8; 32]>

Server verifies client’s confirmation and derives session key. Returns the session key if verification succeeds.

Returns

The derived session key (32 bytes)

Errors

Returns ProtocolError::HandshakeError if verification fails or state is incomplete