Struct ExternalClient

pub struct ExternalClient<C> { /* private fields */ }

Available on crate feature external_client only.

A client capable of observing a group’s state without having private keys required to read content.

This structure is useful when an application is sending plaintext control messages in order to allow a central server to facilitate communication between users.

Warning

This structure will only be able to observe groups that were created by clients that have the encrypt_control_messages option returned by MlsRules::encryption_options set to false. Any control messages that are sent encrypted over the wire will break the ability of this client to track the resulting group state.

Implementations

impl ExternalClient<()>

pub fn builder() -> ExternalClientBuilder<ExternalBaseConfig>

impl<C> ExternalClient<C>

where C: ExternalClientConfig + Clone,

pub fn observe_group( &self, group_info: MlsMessage, tree_data: Option<ExportedTree<'_>>, ) -> Result<ExternalGroup<C>, MlsError>

Begin observing a group based on a GroupInfo message created by Group::group_info_message

tree_data is required to be provided out of band if the client that created GroupInfo message did not did not use the ratchet_tree_extension according to MlsRules::commit_options at the time the welcome message was created. tree_data can be exported from a group using the export tree function.

pub fn load_group( &self, snapshot: ExternalSnapshot, ) -> Result<ExternalGroup<C>, MlsError>

Load an existing observed group by loading a snapshot that was generated by ExternalGroup::snapshot.

pub fn validate_key_package( &self, key_package: MlsMessage, ) -> Result<KeyPackage, MlsError>

pub fn identity_provider(&self) -> <C as ExternalClientConfig>::IdentityProvider

The IdentityProvider that this client was configured to use.