Struct matrix_sdk_crypto::backups::BackupMachine

pub struct BackupMachine { /* private fields */ }

A state machine that handles backing up room keys.

The state machine can be activated using the BackupMachine::enable_backup_v1 method. After the state machine has been enabled a request that will upload encrypted room keys can be generated using the BackupMachine::backup method.

Implementations

impl BackupMachine

pub async fn enabled(&self) -> bool

Are we able to back up room keys to the server?

pub async fn verify_backup( &self, backup_info: RoomKeyBackupInfo, compute_all_signatures: bool ) -> Result<SignatureVerification, CryptoStoreError>

Verify some backup info that we downloaded from the server.

Arguments

• backup_info: The backup info that should be verified. Should be fetched from the server using the /room_keys/version endpoint.

• compute_all_signatures: Useful for debugging only. If this parameter is true, the internal machinery will compute the trust state for all signatures before returning, instead of short-circuiting on the first trusted signature. Has no impact on whether the backup will be considered verified.

pub async fn sign_backup( &self, backup_info: &mut RoomKeyBackupInfo ) -> Result<(), SignatureError>

Sign a RoomKeyBackupInfo using the device’s identity key and, if available, the cross-signing master key.

Arguments

• backup_info: The backup version that should be verified. Should be created from the BackupDecryptionKey using the BackupDecryptionKey::to_backup_info() method.

pub async fn enable_backup_v1( &self, key: MegolmV1BackupKey ) -> Result<(), CryptoStoreError>

Activate the given backup key to be used to encrypt and backup room keys.

This will use the m.megolm_backup.v1.curve25519-aes-sha2 algorithm to encrypt the room keys.

pub async fn room_key_counts(&self) -> Result<RoomKeyCounts, CryptoStoreError>

Get the number of backed up room keys and the total number of room keys.

pub async fn disable_backup(&self) -> Result<(), CryptoStoreError>

Disable and reset our backup state.

This will remove any pending backup request, remove the backup key and reset the backup state of each room key we have.

pub async fn save_decryption_key( &self, backup_decryption_key: Option<BackupDecryptionKey>, version: Option<String> ) -> Result<(), CryptoStoreError>

Store the backup decryption key in the crypto store.

This is useful if the client wants to support gossiping of the backup key.

pub async fn get_backup_keys(&self) -> Result<BackupKeys, CryptoStoreError>

Get the backup keys we have saved in our crypto store.

pub async fn backup( &self ) -> Result<Option<(OwnedTransactionId, KeysBackupRequest)>, CryptoStoreError>

Encrypt a batch of room keys and return a request that needs to be sent out to backup the room keys.

pub async fn import_backed_up_room_keys( &self, room_keys: BTreeMap<OwnedRoomId, BTreeMap<String, BackedUpRoomKey>>, progress_listener: impl Fn(usize, usize) ) -> Result<RoomKeyImportResult, CryptoStoreError>

Import the given room keys into our store.

Arguments

• room_keys - A list of previously exported keys that should be imported into our store. If we already have a better version of a key the key will not be imported.

Returns a RoomKeyImportResult containing information about room keys which were imported.

Trait Implementations

impl Clone for BackupMachine

fn clone(&self) -> BackupMachine

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BackupMachine

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.