tlsSocket.getFinished()

• 返回: <Buffer> | <undefined> 作为 SSL/TLS 握手的一部分已发送到套接字的最新 Finished 消息，如果尚未发送 Finished 消息，则为 undefined。

由于 Finished 消息是完整握手的消息摘要（对于 TLS 1.0 总共有 192 位，对于 SSL 3.0 则更多），当不需要或不需要 SSL/TLS 提供的身份验证时，它们可用于外部身份验证程序不够。

对应于 OpenSSL 中的 SSL_get_finished 例程，可用于实现 RFC 5929 中的 tls-unique 通道绑定。

• Returns: <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.

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.