Struct CommonState

pub struct CommonState { /* private fields */ }

Connection state common to both client and server connections.

Implementations

impl CommonState

pub fn wants_write(&self) -> bool

Returns true if the caller should call Connection::write_tls as soon as possible.

pub fn is_handshaking(&self) -> bool

Returns true if the connection is currently performing the TLS handshake.

During this time plaintext written to the connection is buffered in memory. After Connection::process_new_packets() has been called, this might start to return false while the final handshake packets still need to be extracted from the connection’s buffers.

pub fn peer_certificates(&self) -> Option<&[CertificateDer<'static>]>

Retrieves the certificate chain or the raw public key used by the peer to authenticate.

The order of the certificate chain is as it appears in the TLS protocol: the first certificate relates to the peer, the second certifies the first, the third certifies the second, and so on.

When using raw public keys, the first and only element is the raw public key.

This is made available for both full and resumed handshakes.

For clients, this is the certificate chain or the raw public key of the server.

For servers, this is the certificate chain or the raw public key of the client, if client authentication was completed.

The return value is None until this value is available.

Note: the return type of the ‘certificate’, when using raw public keys is CertificateDer<'static> even though this should technically be a SubjectPublicKeyInfoDer<'static>. This choice simplifies the API and ensures backwards compatibility.

pub fn alpn_protocol(&self) -> Option<&[u8]>

Retrieves the protocol agreed with the peer via ALPN.

A return value of None after handshake completion means no protocol was agreed (because no protocols were offered or accepted by the peer).

pub fn negotiated_cipher_suite(&self) -> Option<SupportedCipherSuite>

Retrieves the ciphersuite agreed with the peer.

This returns None until the ciphersuite is agreed.

pub fn negotiated_key_exchange_group( &self, ) -> Option<&'static dyn SupportedKxGroup>

Retrieves the key exchange group agreed with the peer.

This function may return None depending on the state of the connection, the type of handshake, and the protocol version.

If CommonState::is_handshaking() is true this function will return None. Similarly, if the CommonState::handshake_kind() is HandshakeKind::Resumed and the CommonState::protocol_version() is TLS 1.2, then no key exchange will have occurred and this function will return None.

pub fn protocol_version(&self) -> Option<ProtocolVersion>

Retrieves the protocol version agreed with the peer.

This returns None until the version is agreed.

pub fn handshake_kind(&self) -> Option<HandshakeKind>

Which kind of handshake was performed.

This tells you whether the handshake was a resumption or not.

This will return None before it is known which sort of handshake occurred.

pub fn send_close_notify(&mut self)

Queues a close_notify warning alert to be sent in the next Connection::write_tls call. This informs the peer that the connection is being closed.

Does nothing if any close_notify or fatal alert was already sent.

pub fn wants_read(&self) -> bool

Returns true if the caller should call Connection::read_tls as soon as possible.

If there is pending plaintext data to read with Connection::reader, this returns false. If your application respects this mechanism, only one full TLS message will be buffered by rustls.