Internal
Cryptography bits
This module is internal to the js-sdk; the public API is via MatrixClient.
base matrix api interface
The user ID for the local user
The identifier for this device.
the MatrixClient data store.
storage for the crypto layer.
An initialised RoomList object
Array of verification methods to use. Each element can either be a string from MatrixClient.verificationMethods or a class that implements a verification method.
Readonly backupReadonly basebase matrix api interface
Private Readonly clientthe MatrixClient data store.
Readonly crossReadonly cryptostorage for the crypto layer.
Readonly dehydrationPrivate Readonly deviceThe identifier for this device.
Private deviceReadonly devicePrivate Optional fallbackGlobal override for whether the client should ever send encrypted messages to unverified devices. This provides the default for rooms which do not specify a value.
If true, all unverified devices will be blacklisted by default
Whether sendMessage in a room with unknown and unverified devices should throw an error and not send the message. This has 'Global' for symmetry with setGlobalBlacklistUnverifiedDevices but there is currently no room-level equivalent for this setting.
this is here, rather than in CryptoApi, because I don't think we're
going to support it in the rust crypto implementation.
Readonly inPrivate lastPrivate lastPrivate lazyPrivate Optional needsReadonly olmPrivate onePrivate Optional onePrivate Readonly outgoingPrivate processingPrivate Readonly rePrivate receivedPrivate receivedPrivate roomPrivate roomPrivate roomPrivate Readonly roomAn initialised RoomList object
Readonly secretPrivate sendReadonly supportedPrivate Readonly toPrivate trustReadonly userThe user ID for the local user
Private Readonly verificationUse secretStorage and addKey.
Optional keyID: stringPrivate afterRun various follow-up actions after cross-signing keys have changed locally (either by resetting the keys for the account or by getting them from secret storage), such as signing the current device, upgrading device verifications, etc.
Bootstrap cross-signing by creating keys if needed. If everything is already set up, then no changes are made, so this is safe to run to ensure cross-signing is ready for use.
This function:
The cross-signing API is currently UNSTABLE and may change without notice.
Bootstrap Secure Secret Storage if needed by creating a default key. If everything is already set up, then no changes are made, so this is safe to run to ensure secret storage is ready for use.
This function
The Secure Secret Storage API is currently UNSTABLE and may change without notice.
Cancel any earlier room key request
parameters to match for cancellation
Checks that a given cross-signing private key matches a given public key. This can be used by the getCrossSigningKey callback to verify that the private key it is about to supply is the one that was requested.
true if the key matches, otherwise false
The private key
The public key
Check whether a given deviceinfo is trusted.
The ID of the user whose devices is to be checked.
Optional device: DeviceInfoThe device info object to check
Check whether a given device is trusted.
The ID of the user whose devices is to be checked.
The ID of the device to check
Private checkPrivate checkCheck if a user's cross-signing key is a candidate for upgrading from device verification.
the user whose cross-signing information is to be checked
the cross-signing information to check
Private checkCheck if the cross-signing key is signed by a verified device.
the user ID whose key is being checked
the key that is being checked
the user's devices. Should be a map from device ID to device info
Check the copy of our cross-signing key that we have in the device list and see if we can get the private key. If so, mark it as trusted.
Use secretStorage and checkKey.
Checks that a given secret storage private key matches a given public key. This can be used by the getSecretStorageKey callback to verify that the private key it is about to supply is the one that was requested.
true if the key matches, otherwise false
The private key
The public key
Check whether a given user is trusted.
The ID of the user to check.
Create a recovery key from a user-supplied passphrase.
Object with public key metadata, encoded private recovery key which should be disposed of after displaying to the user, and raw private key to avoid round tripping if needed.
Optional password: stringPassphrase string that can be entered by the user when restoring the backup as an alternative to entering the recovery key. Optional.
Decrypt a received event
resolves once we have
finished decrypting. Rejects with an algorithms.DecryptionError if there
is a problem decrypting the event.
Download the keys for a list of users and stores the keys in the session store.
A promise which resolves to a map userId->deviceId->{@link DeviceInfo}.
The users to fetch.
Optional forceDownload: booleanAlways download the keys even if cached.
Rest ...args: Parameters<CryptoEventHandlerMap[T]>Rest ...args: Parameters<CryptoEventHandlerMap[T]>Encrypts and sends a given object via Olm to-device messages to a given set of devices.
Promise which
resolves once the message has been encrypted and sent to the given
userDeviceMap, and returns the { contentMap, deviceInfoByDeviceId }
of the successfully sent messages.
the devices to send to
fields to include in the encrypted payload
Encrypt an event according to the configuration of the room.
Promise which resolves when the event has been encrypted, or null if nothing was needed
event to be sent
destination room.
Try to make sure we have established olm sessions for all known devices for the given users.
resolves once the sessions are complete, to
an Object mapping from userId to deviceId to
IOlmSessionResult
list of user ids
Optional force: booleanIf true, force a new Olm session to be created. Default false.
Private evalTrigger the appropriate invalidations and removes for a given device list
device_lists field from /sync, or response from /keys/changes
Get a list containing all of the room keys
a list of session export objects
Forces the current outbound group session to be discarded such that another one will be created next time an event is sent.
The ID of the room to discard the session for
This should not normally be necessary.
Whether to trust a others users signatures of their devices. If false, devices will only be considered 'verified' if we have verified that device individually (effectively disabling cross-signing).
Default: true
True if trusting cross-signed devices
Use secretStorage and getDefaultKeyId.
Get information about the encryption of an event
An object with the fields:
sender is set)event to be checked
Get the device which sent an event
event to be checked
whether to blacklist all unverified devices by default
Reference CryptoApi.globalBlacklistUnverifiedDevices directly.
Get information on the active olm sessions with a user
Returns a map from device id to an object with keys 'deviceIdKey' (the device's curve25519 identity key) and 'sessions' (an array of objects in the same format as that returned by getSessionInfoForDevice).
This method is provided for debugging purposes.
id of user to inspect
Internal
Get a decryptor for a given room and algorithm.
If we already have a decryptor for the given room and algorithm, return it. Otherwise try to instantiate it.
DecryptionError if the algorithm is unknown
room id for decryptor. If undefined, a temporary decryptor is instantiated.
crypto algorithm
Private getGet all the room decryptors for a given encryption algorithm.
An array of room decryptors
The encryption algorithm
Use secretStorage and get.
Use secretStorage and getKey.
Optional keyID: stringFetches the backup private key, if cached
the key, if any, or null
Get the cross signing information for a given user.
the cross signing information for the user.
the user ID to get the cross-signing info for.
Get the stored keys for a single device
device, or undefined if we don't know about this device
Get the stored device keys for a user id
list of devices, or null if we haven't managed to get a list of devices for this user yet.
the user to list keys for.
Private getPrivate getPrivate handleUse secretStorage and hasKey.
Optional keyID: stringImport a list of room keys previously exported by exportRoomKeys
a promise which resolves once the keys have been imported
a list of session export objects
Initialise the crypto module so that it is ready for use
Returns a promise which resolves once the crypto module is ready for use.
(Optional) data from exported device that must be re-created.
Checks whether cross signing:
If this function returns false, bootstrapCrossSigning() can be used to fix things such that it returns true. That is to say, after bootstrapCrossSigning() completes successfully, this function should return true.
The cross-signing API is currently UNSTABLE and may change without notice.
True if cross-signing is ready to be used on this device
Checks whether secret storage:
If this function returns false, bootstrapSecretStorage() can be used to fix things such that it returns true. That is to say, after bootstrapSecretStorage() completes successfully, this function should return true.
The Secure Secret Storage API is currently UNSTABLE and may change without notice.
True if secret storage is ready to be used on this device
Use secretStorage and isStored.
Private maybehandle an m.room.encryption event
in which the event was received
encryption event to be processed
Private onPrivate onInternal
Handle a general key verification event.
verification start event
Private onOptional oldMembership: stringPrivate onInternal
Handle a key event
key event
Private onInternal
Called when we get an m.room_key_request event.
key request event
Private onInternal
Handle a key withheld event
key withheld event
Private onInternal
Handle a change in the membership state of a member of a room
event causing the change
user whose membership changed
Optional oldMembership: stringprevious membership
handle the completion of a /sync
This is called after the processing of each successful /sync response. It is an opportunity to do a batch process on the information received.
the data from the 'MatrixClient.sync' event
Called before the result of a sync is processed
the data from the 'MatrixClient.sync' event
Private onInternal
Handle key verification requests sent as timeline events
the timeline event
not used
not used
not used
this is a live event
Private onInternal
Handle a toDevice event that couldn't be decrypted
undecryptable event
Private onCalled by the /sync loop whenever there are incoming to-device messages.
The implementation may preprocess the received messages (eg, decrypt them) and return an updated list of messages for dispatch to the rest of the system.
Note that, unlike ToDeviceEvent events, this is called on the raw to-device messages, rather than the results of any decryption attempts.
A list of preprocessed to-device messages.
the received to-device messages
Handle the notification from /sync that device lists have been changed.
device_lists field from /sync
Called by the /sync loop when one time key counts and unused fallback key details are received.
Optional oneTimeKeysCounts: Record<string, number>the received one time key counts
Optional unusedFallbackKeys: string[]the received unused fallback keys
Private processHelper for processReceivedRoomKeyRequests
Private processHelper for processReceivedRoomKeyRequests
Private processTell the crypto module to register for MatrixClient events which it needs to listen for
event source where we can register for event notifications
Optional event: EventEmitterEvents | CryptoEventSend a request for some room keys, if we have not already done so
a promise that resolves when the key request is queued
whether to resend the key request if there is already one
Optional devices: string[]Private requestSave the device list, if necessary
true if the data was saved, false if it was not (eg. because no changes were pending). The promise will only resolve once the data is saved, so may take some time to resolve.
Time in ms before which the save actually happens. By default, the save is delayed for a short period in order to batch multiple writes, but this behaviour can be disabled by passing 0.
Use secretStorage and setDefaultKeyId.
Update the blocked/verified state of the given device
updated DeviceInfo
owner of the device
unique identifier for the device or user's cross-signing public key ID.
whether to mark the device as verified. Null to leave unchanged.
whether to mark the device as blocked. Null to leave unchanged.
whether to mark that the user has been made aware of the existence of this device. Null to leave unchanged
Optional keys: Record<string, string>The list of keys that was present during the device verification. This will be double checked with the list of keys the given device has currently.
Set the global override for whether the client should ever send encrypted messages to unverified devices. This provides the default for rooms which do not specify a value.
Set CryptoApi.globalBlacklistUnverifiedDevices directly.
whether to blacklist all unverified devices by default
Configure a room to use encryption (ie, save a flag in the cryptoStore).
It is normally incorrect to call this method directly. Encryption
is enabled by receiving an m.room.encryption event (which we may have sent
previously).
The room ID to enable encryption in.
The encryption config for the room.
Optional inhibitDeviceQuery: booleantrue to suppress device list query for users in the room (for now). In case lazy loading is enabled, the device query is always inhibited as the members are not tracked.
Private setSet up encryption for a room.
This is called when an m.room.encryption event is received. It saves a flag for the room in the cryptoStore (if it wasn't already set), sets up an "encryptor" for the room, and enables device-list tracking for the room.
It does not initiate a device list query for the room. That is normally done once we finish processing the sync, in onSyncCompleted.
The room to enable encryption in.
The encryption config for the room.
sign the given object with our ed25519 key
Object to which we will add a 'signatures' property
Use secretStorage and store.
Optional keys: string[]Private storeStore a set of keys as our own, trusted, cross-signing keys.
The new trusted set of keys
Make sure we are tracking the device lists for all users in this room.
when all devices for the room have been fetched and marked to track
there's normally no need to call this function: device list tracking will be enabled as soon as we have the full membership list.
The room ID to start tracking devices in.
Private trackMake sure we are tracking the device lists for all users in this room.
This is normally called when we are about to send an encrypted event, to make sure we have all the devices in the room; but it is also called when processing an m.room.encryption state event (if lazy-loading is disabled), or when members are loaded (if lazy-loading is enabled), to prepare the device list.
Room to enable device-list tracking in
Private updateUpload the device keys to the homeserver.
A promise that will resolve when the keys are uploaded.
Private uploadStatic getGenerated using TypeDoc
Common interface for the crypto implementations