[WIP] MSC2697: Device dehydration #2697

uhoreg · 2020-07-24T21:40:43Z

Rendered

related to element-hq/element-web#3825

implementation: synapse: matrix-org/synapse#8380, matrix-js-sdk: matrix-org/matrix-js-sdk#1436

proposals/2697-device-dehydration.md

Co-authored-by: Matthew Hodgson <matthew@arasphere.net>

clokep · 2020-08-14T15:21:35Z

proposals/2697-device-dehydration.md

+  "user_id": "full MXID",
+  "home_server": "home server address",
+  "device_data": "base64+encoded+device+data",
+  "device_id": "ID of dehydrated device",


What happens in the case of them providing restore_device and device_id? Is device ID ignored?

I'll clarify this in the text, but basically, if they specify a device_id, then it will be used in the event that the dehydrated device is not used.

proposals/2697-device-dehydration.md

…string

proposals/2697-device-dehydration.md

clokep · 2020-08-20T19:26:49Z

Looking at this again with fresh eyes (and some conversations with @richvdh) there's a couple of questions we have:

Why is this being put into the (already complicated) login flow? An alternative might be to do a normal login and then request restoring a device. There's something about a device ID + access token pair being immutable, but we weren't sure where that logic came from (or if it is necessary). This could help avoid having to create a new dehydrated_token since the user would have a standard access token.
What is the failure mode if a client cannot rehydrate the device (I think they send rehydrate to false), but either way I think they get logged in? If so, it seems like it would be simpler for the flow to be:
- Client logs in normally.
- Client requests the dehydrated device.
- If client can rehydrate the device it does so, and tells the server it will be using it. Server responds with an ack saying it is OK to use it. (And maybe has to do with something with device IDs on the backend, but that seems quite implementation specific.)

uhoreg · 2020-08-20T21:18:06Z

If so, it seems like it would be simpler for the flow to be:

Client logs in normally.

Client requests the dehydrated device.

If client can rehydrate the device it does so, and tells the server it will be using it. Server responds with an ack saying it is OK to use it. (And maybe has to do with something with device IDs on the backend, but that seems quite implementation specific.)

I think the main issue is that this would involve changing the device ID in the client, and we don't have anything that does that yet, and I don't know what implications that could have. One possible issue is if the client has started a /sync, then what happens when the device ID changes? Will it suddenly return the to-device messages from the new device, or will it wait until the next /sync call?

clokep · 2020-08-24T17:02:09Z

One possible issue is if the client has started a /sync, then what happens when the device ID changes? Will it suddenly return the to-device messages from the new device, or will it wait until the next /sync call?

I think it would be reasonable for the client to know not to call any other APIs until the dehydrated device API call is done (since the client will know whether or not it is going to make that call).

ara4n · 2020-08-29T16:09:35Z

can we put the MSC label on this so it's easier to find (even though it's still WIP?)

opusforlife2 · 2020-09-07T11:43:55Z

This couldn't come fast enough. I have to sheepishly ask people to resend messages each time I log in and see "Unable to decrypt".

clokep · 2020-09-15T18:48:56Z

There's something about a device ID + access token pair being immutable, but we weren't sure where that logic came from (or if it is necessary).

The specification does say something about this:

Client devices are closely related to access tokens. Matrix servers should record which device each access token is assigned to, so that subsequent requests can be handled correctly.

By default, the Login and Registration processes auto-generate a new device_id. A client is also free to generate its own device_id or, provided the user remains the same, reuse a device: in either case the client should pass the device_id in the request body. If the client sets the device_id, the server will invalidate any access token previously assigned to that device. There is therefore at most one active access token assigned to each device at any one time.

My interpretation of this is that we need to ensure that mapping between device ID <---> access token is unique, but there shouldn't be an issue with changing the device ID by calling an API. (In fact this is a thing that is already described in the paragraph above -- the client ID provided by the client can be ignored and the server can choose to create a new device ID.)

From the above, my inclination would be to disconnect this from explicitly being part of the login flow, although include some information of "generally device rehydration will happen directly after login". I might be over-simplifying something somewhere else in the specification though!

MayeulC · 2020-09-23T22:12:30Z

The unusual name caught my attention. I personally find that, while that name is cute and might be fine as a codename for now, it is absolutely not obvious from the outside, and one has to read the MSC to understand what that means.

This simply sounds like "sending megolm keys to key backup" to me, or "key backup as a device" :)

As a consequence of this, what are the security implications? How could I verify someone's key backup (dehydrated device)? Have one of their device cross-sign it? What prevents someone who takes over the account from creating a new key backup and/or dehydrated device, then extracting the keys from it?

I might have misunderstood the MSC, my apologies if that's the case.

Rather than uploading a dehydrated device to the server, we could instead have the sender resend the megolm session in the case where a user had no active devices at the time that a message was sent. However this does not solve the issue for users who happen to never be online at the same time. But this could be done in addition to the solution proposed here.

Must this be done in real time? Couldn't it be done asynchronously?

uhoreg · 2020-09-24T02:38:38Z

As a consequence of this, what are the security implications? How could I verify someone's key backup (dehydrated device)? Have one of their device cross-sign it?

Yes, cross-signing would be the normal way to establish trust. One advantage to using a dehydrated device rather than some other mechanism is that the way that we treat normal devices carries over to the dehydrated devices.

What prevents someone who takes over the account from creating a new key backup and/or dehydrated device, then extracting the keys from it?

If they've taken over the account, then they can just create a normal device, so this doesn't give them anything else.

Must this be done in real time? Couldn't it be done asynchronously?

It can be done asynchronously as usual olm messages are sent asynchronously. However it relies on both users having a device that is logged in at the same time. There are instances where Alice and Bob only log in for short periods of time and then log out immediately. (The MSC should probably say "...this does not solve the issue for users who never happen to have logged-in devices at the same time.")

richvdh · 2021-12-24T14:16:37Z

proposals/2697-device-dehydration.md

+#### `m.dehydration.v1.olm.libolm_pickle`
+
+- `passphrase`: Optional.  Indicates how to generate the decryption key from a
+  passphrase.  It is in the same format with Secure Secret Storage.
+- `account`: Required. FIXME: libolm's pickle format


It's not ideal that we're tying this to a particular implementation's format, not least because, as noted over at matrix-org/olm#53, it's not entirely obvious that libolm's pickles are the most sensible format.

Indeed. Vodozemac is also defining its own JSON-based pickle format.

libolm's pickle format is very much tied to some implementation details (e.g. otk IDs being a counter), so may not be suitable for other implementations. On the other hand, a more generic format may not be usable by libolm. We may end up with a situation where we'll end up with multiple pickle formats for dehydration (e.g. m.dehydration.v1.olm.libolm_pickle, m.dehydration.v1.olm.vodozemac_pickle), and you'll only be able to rehydrate if your implementation supports that format. Which is ... not ideal, but may be unavoidable unless we also want to end up dictating certain things about implementation details.

DMRobertson · 2022-10-04T18:26:18Z

proposals/2697-device-dehydration.md

+```json
+{
+  "device_data": {
+    "algorithm": "m.dehydration.v1.olm"
+    "other_fields": "other_values"
+  },
+  "initial_device_display_name": "foo bar",
+}
+```


Presumably:

device_data andalgorithm are mandatory

other fields can be freely included in device_data

initial device display name is optional (mirroring /login)?

xref matrix-org/synapse#14052

Yes, that's correct

Julian-Dumitrascu · 2022-10-17T08:47:50Z

Where is device dehydration defined?
I don't know what it is and Google Search hasn't helped.
I'd like to decide whether to use this feature.

BillCarsonFr · 2022-10-21T10:23:48Z

proposals/2697-device-dehydration.md

+does get rehydrated, due to the number of messages that it will retrieve.
+Again, this can be addressed by periodically replacing the dehydrated device,
+or by performing a `/sync` for the dehydrated device and updating it.
+


There is I think some side effects to expect with verifications and device list management.
A dehydrated device will appear as a regular device in keys/query right?

Should we display them as a regular device in the device list manager? Wouldn't it look suspicious for user with only one login to see 2 devices?

Also what happen when you request a verification to such devices? Does it impacts the self verification process (where we check for existing devices?

The client could tell which device is the dehydrated device by calling GET /dehydrated_device and comparing device IDs. Alternatively, (and maybe better) we could make the server throw a flag in the unsigned portion of the device key object, maybe a "dehydrated": true.

Either way, it would be up to the client to handle the issues that you listed, e.g. by displaying them differently from regular devices, omitting them from verifications, etc.

opusforlife2 · 2022-10-21T19:00:45Z

Has this not been superseded by #3814?

uhoreg · 2022-10-26T03:35:07Z

Has this not been superseded by #3814?

The plan is to do 3814 instead of this, but 3814 hasn't been properly tested yet. (Famedly has an implementation of something similar, but slightly different from what is in the MSC.) Once 3814 is implemented and reasonably tested, this will probably be closed.

Upstream changes: Synapse 1.70.1 (2022-10-28) =========================== (bugfixes) Synapse 1.70.0 (2022-10-26) =========================== Features -------- - Support for [MSC3856](matrix-org/matrix-spec-proposals#3856): threads list API. ([\#13394](matrix-org/synapse#13394), [\#14171](matrix-org/synapse#14171), [\#14175](matrix-org/synapse#14175)) - Support for thread-specific notifications & receipts ([MSC3771](matrix-org/matrix-spec-proposals#3771) and [MSC3773](matrix-org/matrix-spec-proposals#3773)). ([\#13776](matrix-org/synapse#13776), [\#13824](matrix-org/synapse#13824), [\#13877](matrix-org/synapse#13877), [\#13878](matrix-org/synapse#13878), [\#14050](matrix-org/synapse#14050), [\#14140](matrix-org/synapse#14140), [\#14159](matrix-org/synapse#14159), [\#14163](matrix-org/synapse#14163), [\#14174](matrix-org/synapse#14174), [\#14222](matrix-org/synapse#14222)) - Stop fetching missing `prev_events` after we already know their signature is invalid. ([\#13816](matrix-org/synapse#13816)) - Send application service access tokens as a header (and query parameter). Implements [MSC2832](matrix-org/matrix-spec-proposals#2832). ([\#13996](matrix-org/synapse#13996)) - Ignore server ACL changes when generating pushes. Implements [MSC3786](matrix-org/matrix-spec-proposals#3786). ([\#13997](matrix-org/synapse#13997)) - Experimental support for redirecting to an implementation of a [MSC3886](matrix-org/matrix-spec-proposals#3886) HTTP rendezvous service. ([\#14018](matrix-org/synapse#14018)) - The `/relations` endpoint can now be used on workers. ([\#14028](matrix-org/synapse#14028)) - Advertise support for Matrix 1.3 and 1.4 on `/_matrix/client/versions`. ([\#14032](matrix-org/synapse#14032), [\#14184](matrix-org/synapse#14184)) - Improve validation of request bodies for the [Device Management](https://spec.matrix.org/v1.4/client-server-api/#device-management) and [MSC2697 Device Dehyrdation](matrix-org/matrix-spec-proposals#2697) client-server API endpoints. ([\#14054](matrix-org/synapse#14054)) - Experimental support for [MSC3874](matrix-org/matrix-spec-proposals#3874): Filtering threads from the `/messages` endpoint. ([\#14148](matrix-org/synapse#14148)) - Improve the validation of the following PUT endpoints: [`/directory/room/{roomAlias}`](https://spec.matrix.org/v1.4/client-server-api/#put_matrixclientv3directoryroomroomalias), [`/directory/list/room/{roomId}`](https://spec.matrix.org/v1.4/client-server-api/#put_matrixclientv3directorylistroomroomid) and [`/directory/list/appservice/{networkId}/{roomId}`](https://spec.matrix.org/v1.4/application-service-api/#put_matrixclientv3directorylistappservicenetworkidroomid). ([\#14179](matrix-org/synapse#14179)) Deprecations and Removals ------------------------- - Remove the experimental implementation of [MSC3772](matrix-org/matrix-spec-proposals#3772). ([\#14094](matrix-org/synapse#14094)) - Remove the unstable identifier for [MSC3715](matrix-org/matrix-spec-proposals#3715). ([\#14106](matrix-org/synapse#14106), [\#14146](matrix-org/synapse#14146))

@asymmetric

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@wrjlewis

No significant changes since 1.89.0rc1. - Add Unix Socket support for HTTP Replication Listeners. [Document and provide usage instructions](https://matrix-org.github.io/synapse/v1.89/usage/configuration/config_documentation.html#listeners) for utilizing Unix sockets in Synapse. Contributed by Jason Little. ([\matrix-org#15708](matrix-org#15708), [\matrix-org#15924](matrix-org#15924)) - Allow `+` in Matrix IDs, per [MSC4009](matrix-org/matrix-spec-proposals#4009). ([\matrix-org#15911](matrix-org#15911)) - Support room version 11 from [MSC3820](matrix-org/matrix-spec-proposals#3820). ([\matrix-org#15912](matrix-org#15912)) - Allow configuring the set of workers to proxy outbound federation traffic through via `outbound_federation_restricted_to`. 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([\matrix-org#15928](matrix-org#15928)) - Mark `get_user_in_directory` private since it is only used in tests. Also remove the cache from it. ([\matrix-org#15884](matrix-org#15884)) - Document which Python version runs on a given Linux distribution so we can more easily clean up later. ([\matrix-org#15909](matrix-org#15909)) - Add details to warning in log when we fail to fetch an alias. ([\matrix-org#15922](matrix-org#15922)) - Remove unneeded `__init__`. ([\matrix-org#15926](matrix-org#15926)) - Fix bug with read/write lock implementation. This is currently unused so has no observable effects. ([\matrix-org#15933](matrix-org#15933), [\matrix-org#15958](matrix-org#15958)) - Unbreak the nix development environment by pinning the Rust version to 1.70.0. ([\matrix-org#15940](matrix-org#15940)) - Update presence metrics to differentiate remote vs local users. ([\matrix-org#15952](matrix-org#15952)) - Stop reading from column `user_id` of table `profiles`. ([\matrix-org#15955](matrix-org#15955)) - Build packages for Debian Trixie. ([\matrix-org#15961](matrix-org#15961)) - Reduce the amount of state we pull out. ([\matrix-org#15968](matrix-org#15968)) - Speed up updating state in large rooms. ([\matrix-org#15971](matrix-org#15971)) * Bump anyhow from 1.0.71 to 1.0.72. ([\matrix-org#15949](matrix-org#15949)) * Bump click from 8.1.3 to 8.1.6. ([\matrix-org#15984](matrix-org#15984)) * Bump cryptography from 41.0.1 to 41.0.2. ([\matrix-org#15943](matrix-org#15943)) * Bump jsonschema from 4.17.3 to 4.18.3. ([\matrix-org#15948](matrix-org#15948)) * Bump pillow from 9.4.0 to 10.0.0. ([\matrix-org#15986](matrix-org#15986)) * Bump prometheus-client from 0.17.0 to 0.17.1. ([\matrix-org#15945](matrix-org#15945)) * Bump pydantic from 1.10.10 to 1.10.11. ([\matrix-org#15946](matrix-org#15946)) * Bump pygithub from 1.58.2 to 1.59.0. ([\matrix-org#15834](matrix-org#15834)) * Bump pyo3-log from 0.8.2 to 0.8.3. ([\matrix-org#15951](matrix-org#15951)) * Bump sentry-sdk from 1.26.0 to 1.28.1. ([\matrix-org#15985](matrix-org#15985)) * Bump serde_json from 1.0.100 to 1.0.103. ([\matrix-org#15950](matrix-org#15950)) * Bump types-pillow from 9.5.0.4 to 10.0.0.1. ([\matrix-org#15932](matrix-org#15932)) * Bump types-requests from 2.31.0.1 to 2.31.0.2. ([\matrix-org#15983](matrix-org#15983)) * Bump typing-extensions from 4.5.0 to 4.7.1. ([\matrix-org#15947](matrix-org#15947))

@wrjlewis

No significant changes since 1.89.0rc1. - Add Unix Socket support for HTTP Replication Listeners. [Document and provide usage instructions](https://matrix-org.github.io/synapse/v1.89/usage/configuration/config_documentation.html#listeners) for utilizing Unix sockets in Synapse. Contributed by Jason Little. ([\matrix-org#15708](matrix-org#15708), [\matrix-org#15924](matrix-org#15924)) - Allow `+` in Matrix IDs, per [MSC4009](matrix-org/matrix-spec-proposals#4009). ([\matrix-org#15911](matrix-org#15911)) - Support room version 11 from [MSC3820](matrix-org/matrix-spec-proposals#3820). ([\matrix-org#15912](matrix-org#15912)) - Allow configuring the set of workers to proxy outbound federation traffic through via `outbound_federation_restricted_to`. ([\matrix-org#15913](matrix-org#15913), [\matrix-org#15969](matrix-org#15969)) - Implement [MSC3814](matrix-org/matrix-spec-proposals#3814), dehydrated devices v2/shrivelled sessions and move [MSC2697](matrix-org/matrix-spec-proposals#2697) behind a config flag. Contributed by Nico from Famedly, H-Shay and poljar. ([\matrix-org#15929](matrix-org#15929)) - Fix a long-standing bug where remote invites weren't correctly pushed. ([\matrix-org#15820](matrix-org#15820)) - Fix background schema updates failing over a large upgrade gap. ([\matrix-org#15887](matrix-org#15887)) - Fix a bug introduced in 1.86.0 where Synapse starting with an empty `experimental_features` configuration setting. ([\matrix-org#15925](matrix-org#15925)) - Fixed deploy annotations in the provided Grafana dashboard config, so that it shows for any homeserver and not just matrix.org. Contributed by @wrjlewis. ([\matrix-org#15957](matrix-org#15957)) - Ensure a long state res does not starve CPU by occasionally yielding to the reactor. ([\matrix-org#15960](matrix-org#15960)) - Properly handle redactions of creation events. ([\matrix-org#15973](matrix-org#15973)) - Fix a bug where resyncing stale device lists could block responding to federation transactions, and thus delay receiving new data from the remote server. ([\matrix-org#15975](matrix-org#15975)) - Better clarify how to run a worker instance (pass both configs). ([\matrix-org#15921](matrix-org#15921)) - Improve [the documentation](https://matrix-org.github.io/synapse/v1.89/admin_api/user_admin_api.html#login-as-a-user) for the login as a user admin API. ([\matrix-org#15938](matrix-org#15938)) - Fix broken Arch Linux package link. Contributed by @SnipeXandrej. ([\matrix-org#15981](matrix-org#15981)) - Remove support for calling the `/register` endpoint with an unspecced `user` property for application services. ([\matrix-org#15928](matrix-org#15928)) - Mark `get_user_in_directory` private since it is only used in tests. Also remove the cache from it. ([\matrix-org#15884](matrix-org#15884)) - Document which Python version runs on a given Linux distribution so we can more easily clean up later. ([\matrix-org#15909](matrix-org#15909)) - Add details to warning in log when we fail to fetch an alias. ([\matrix-org#15922](matrix-org#15922)) - Remove unneeded `__init__`. ([\matrix-org#15926](matrix-org#15926)) - Fix bug with read/write lock implementation. This is currently unused so has no observable effects. ([\matrix-org#15933](matrix-org#15933), [\matrix-org#15958](matrix-org#15958)) - Unbreak the nix development environment by pinning the Rust version to 1.70.0. ([\matrix-org#15940](matrix-org#15940)) - Update presence metrics to differentiate remote vs local users. ([\matrix-org#15952](matrix-org#15952)) - Stop reading from column `user_id` of table `profiles`. ([\matrix-org#15955](matrix-org#15955)) - Build packages for Debian Trixie. ([\matrix-org#15961](matrix-org#15961)) - Reduce the amount of state we pull out. ([\matrix-org#15968](matrix-org#15968)) - Speed up updating state in large rooms. ([\matrix-org#15971](matrix-org#15971)) * Bump anyhow from 1.0.71 to 1.0.72. ([\matrix-org#15949](matrix-org#15949)) * Bump click from 8.1.3 to 8.1.6. ([\matrix-org#15984](matrix-org#15984)) * Bump cryptography from 41.0.1 to 41.0.2. ([\matrix-org#15943](matrix-org#15943)) * Bump jsonschema from 4.17.3 to 4.18.3. ([\matrix-org#15948](matrix-org#15948)) * Bump pillow from 9.4.0 to 10.0.0. ([\matrix-org#15986](matrix-org#15986)) * Bump prometheus-client from 0.17.0 to 0.17.1. ([\matrix-org#15945](matrix-org#15945)) * Bump pydantic from 1.10.10 to 1.10.11. ([\matrix-org#15946](matrix-org#15946)) * Bump pygithub from 1.58.2 to 1.59.0. ([\matrix-org#15834](matrix-org#15834)) * Bump pyo3-log from 0.8.2 to 0.8.3. ([\matrix-org#15951](matrix-org#15951)) * Bump sentry-sdk from 1.26.0 to 1.28.1. ([\matrix-org#15985](matrix-org#15985)) * Bump serde_json from 1.0.100 to 1.0.103. ([\matrix-org#15950](matrix-org#15950)) * Bump types-pillow from 9.5.0.4 to 10.0.0.1. ([\matrix-org#15932](matrix-org#15932)) * Bump types-requests from 2.31.0.1 to 2.31.0.2. ([\matrix-org#15983](matrix-org#15983)) * Bump typing-extensions from 4.5.0 to 4.7.1. ([\matrix-org#15947](matrix-org#15947)) # -----BEGIN PGP SIGNATURE----- # # iQIzBAABCAAdFiEE1508oLYUKainYFJakD7OEIo53t0FAmTI2e4ACgkQkD7OEIo5 # 3t2x1RAAohu1Rmjv0mOqFR4P1YZpA5RFbYajcyq77n/ciDKSM1dqBelONqKOq2A9 # uGbVNm6rC+EFwIl5MF5TrFdsDQHvGcRgW6NpQDZ+uIUOYizjZH1g37BoNPLlGYQx # fmKG7/XqdWhSc5tHN9HsRHyHKmsndebjXoUCPKmieGZa1GLXvGwrNkWQlEpwd9Qu # mj3uewJxLFGgIIAOiplJ4UO8FaCbMD+By27hSiWtVsLT6pyav4HC2P8RQD1iv0jW # OXNHvEWyqfBPlsPOkCD4nQZrmZqa5GWLYfBm8zFgIBxNy+e33C07L4bO+QdCE86v # /SUKug/0nsp66jSZst1fM/M2ssXvjU+LNO9fqonOCZ4TiJ4i/yoa8AvmcAg5hy7C # HR9IBp9cMrQ2u1y2/knxF657AGHxgXEltgw0PDvZHowqsqoSb+5HWl0zv1wnVjMa # 2QYLKWPBk/AdlHkmC3S4/+gfVZVsT2RSBP3JUCbFyOqug9vXFvSGTfH07Lk4PDI3 # o5idBzumvyonsuC2ypkzlj49FAj21l/8DInxEpY9JcHdVncLWvu9gmLd+H7GY7H7 # ODa2gOynrsSGVH7IpOl6dpw/GH6R8ZlfHl87bFslOqVObBxquL/ODIoFOgld+MpT # YYXp+0tW564mg+AYw3+eo44JTq0lKh7eyENP3SqKN/Z8ssQL97c= # =Ar/g # -----END PGP SIGNATURE----- # gpg: Signature made Tue Aug 1 11:09:50 2023 BST # gpg: using RSA key D79D3CA0B61429A8A760525A903ECE108A39DEDD # gpg: key 903ECE108A39DEDD: new key but contains no user ID - skipped # gpg: Total number processed: 1 # gpg: w/o user IDs: 1 # gpg: Can't check signature: No public key # Conflicts: # poetry.lock # synapse/http/site.py # synapse/storage/databases/main/roommember.py

@jcgruenhage

No significant changes since 1.93.0rc1. The following issues are fixed in 1.93.0 (and RCs). - [GHSA-4f74-84v3-j9q5](GHSA-4f74-84v3-j9q5) / [CVE-2023-41335](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-41335) — Low Severity Temporary storage of plaintext passwords during password changes. - [GHSA-7565-cq32-vx2x](GHSA-7565-cq32-vx2x) / [CVE-2023-42453](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42453) — Low Severity Improper validation of receipts allows forged read receipts. See the advisories for more details. If you have any questions, email security@matrix.org. - Add automatic purge after all users have forgotten a room. ([\matrix-org#15488](matrix-org#15488)) - Restore room purge/shutdown after a Synapse restart. ([\matrix-org#15488](matrix-org#15488)) - Support resolving homeservers using `matrix-fed` DNS SRV records from [MSC4040](matrix-org/matrix-spec-proposals#4040). ([\matrix-org#16137](matrix-org#16137)) - Add the ability to use `G` (GiB) and `T` (TiB) suffixes in configuration options that refer to numbers of bytes. ([\matrix-org#16219](matrix-org#16219)) - Add span information to requests sent to appservices. Contributed by MTRNord. ([\matrix-org#16227](matrix-org#16227)) - Add the ability to enable/disable registrations when using CAS. Contributed by Aurélien Grimpard. ([\matrix-org#16262](matrix-org#16262)) - Allow the `/notifications` endpoint to be routed to workers. ([\matrix-org#16265](matrix-org#16265)) - Enable users to easily unsubscribe to notifications emails via the `List-Unsubscribe` header. ([\matrix-org#16274](matrix-org#16274)) - Report whether a user is `locked` in the [List Accounts admin API](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#list-accounts), and exclude locked users by default. ([\matrix-org#16328](matrix-org#16328)) - Fix a long-standing bug where multi-device accounts could cause high load due to presence. ([\matrix-org#16066](matrix-org#16066), [\matrix-org#16170](matrix-org#16170), [\matrix-org#16171](matrix-org#16171), [\matrix-org#16172](matrix-org#16172), [\matrix-org#16174](matrix-org#16174)) - Fix a long-standing bug where appservices using [MSC2409](matrix-org/matrix-spec-proposals#2409) to receive `to_device` messages would only get messages for one user. ([\matrix-org#16251](matrix-org#16251)) - Fix bug when using workers where Synapse could end up re-requesting the same remote device repeatedly. ([\matrix-org#16252](matrix-org#16252)) - Fix long-standing bug where we kept re-requesting a remote server's key repeatedly, potentially causing delays in receiving events over federation. ([\matrix-org#16257](matrix-org#16257)) - Avoid temporary storage of sensitive information. ([\matrix-org#16272](matrix-org#16272)) - Fix bug introduced in Synapse 1.49.0 when using dehydrated devices ([MSC2697](matrix-org/matrix-spec-proposals#2697)) and refresh tokens. Contributed by Hanadi. ([\matrix-org#16288](matrix-org#16288)) - Fix a long-standing bug where invalid receipts would be accepted. ([\matrix-org#16327](matrix-org#16327)) - Use standard name for UTF-8 charset in emails. ([\matrix-org#16329](matrix-org#16329)) - Don't try refetching device lists for users on remote hosts that are marked as "down". ([\matrix-org#16298](matrix-org#16298)) - Fix typos in the documentation. ([\matrix-org#16282](matrix-org#16282)) - Link to the Alpine Linux community package for Synapse. ([\matrix-org#16304](matrix-org#16304)) - Use string for `federation_client_minimum_tls_version` documentation examples. Contributed by @jcgruenhage. ([\matrix-org#16353](matrix-org#16353)) - Allow modules to delete rooms. ([\matrix-org#15997](matrix-org#15997)) - Add GCC and GNU Make to the Nix flake development environment so that `ruff` can be compiled. ([\matrix-org#16090](matrix-org#16090), [\matrix-org#16263](matrix-org#16263)) - Fix type checking when using the new version of Twisted. ([\matrix-org#16235](matrix-org#16235)) - Delete device messages asynchronously and in staged batches using the task scheduler. ([\matrix-org#16240](matrix-org#16240), [\matrix-org#16311](matrix-org#16311), [\matrix-org#16312](matrix-org#16312), [\matrix-org#16313](matrix-org#16313)) - Bump minimum supported Rust version to 1.61.0. ([\matrix-org#16248](matrix-org#16248)) - Update rust to version 1.71.1 in the nix development environment. ([\matrix-org#16260](matrix-org#16260)) - Simplify server key storage. ([\matrix-org#16261](matrix-org#16261)) - Reduce CPU overhead of change password endpoint. ([\matrix-org#16264](matrix-org#16264)) - Stop purging from tables slated for removal. ([\matrix-org#16273](matrix-org#16273)) - Improve type hints. ([\matrix-org#16276](matrix-org#16276), [\matrix-org#16301](matrix-org#16301), [\matrix-org#16325](matrix-org#16325), [\matrix-org#16326](matrix-org#16326)) - Raise `setuptools_rust` version cap to 1.7.0. ([\matrix-org#16277](matrix-org#16277)) - Fix using the new task scheduler causing lots of CPU to be used. ([\matrix-org#16278](matrix-org#16278)) - Upgrade CI run of Python 3.12 from rc1 to rc2. ([\matrix-org#16280](matrix-org#16280)) - Include values in SQL debug when using `execute_values` with Postgres. ([\matrix-org#16281](matrix-org#16281)) - Enable additional linting checks. ([\matrix-org#16283](matrix-org#16283)) - Refactor `receipts_graph` Postgres transactions to stop error messages. ([\matrix-org#16299](matrix-org#16299)) - Small improvements to logging in replication code. ([\matrix-org#16309](matrix-org#16309)) - Remove a reference cycle in background processes. ([\matrix-org#16314](matrix-org#16314)) - Only use literal strings for background process names. ([\matrix-org#16315](matrix-org#16315)) - Refactor `get_user_by_id`. ([\matrix-org#16316](matrix-org#16316)) - Speed up task to delete to-device messages. ([\matrix-org#16318](matrix-org#16318)) - Avoid patching code in tests. ([\matrix-org#16349](matrix-org#16349)) - Test against PostgreSQL 16. ([\matrix-org#16351](matrix-org#16351)) * Bump mypy from 1.4.1 to 1.5.1. ([\matrix-org#16300](matrix-org#16300)) * Bump black from 23.7.0 to 23.9.1. ([\matrix-org#16295](matrix-org#16295)) * Bump docker/build-push-action from 4 to 5. ([\matrix-org#16336](matrix-org#16336)) * Bump docker/login-action from 2 to 3. ([\matrix-org#16339](matrix-org#16339)) * Bump docker/metadata-action from 4 to 5. ([\matrix-org#16337](matrix-org#16337)) * Bump docker/setup-qemu-action from 2 to 3. ([\matrix-org#16338](matrix-org#16338)) * Bump furo from 2023.8.19 to 2023.9.10. ([\matrix-org#16340](matrix-org#16340)) * Bump gitpython from 3.1.32 to 3.1.35. ([\matrix-org#16267](matrix-org#16267), [\matrix-org#16279](matrix-org#16279)) * Bump mypy-zope from 1.0.0 to 1.0.1. ([\matrix-org#16291](matrix-org#16291)) * Bump pillow from 10.0.0 to 10.0.1. ([\matrix-org#16344](matrix-org#16344)) * Bump regex from 1.9.4 to 1.9.5. ([\matrix-org#16233](matrix-org#16233)) * Bump ruff from 0.0.286 to 0.0.290. ([\matrix-org#16342](matrix-org#16342)) * Bump serde_json from 1.0.105 to 1.0.107. ([\matrix-org#16296](matrix-org#16296), [\matrix-org#16345](matrix-org#16345)) * Bump twisted from 22.10.0 to 23.8.0. ([\matrix-org#16235](matrix-org#16235)) * Bump types-pillow from 10.0.0.2 to 10.0.0.3. ([\matrix-org#16293](matrix-org#16293)) * Bump types-setuptools from 68.0.0.3 to 68.2.0.0. ([\matrix-org#16292](matrix-org#16292)) * Bump typing-extensions from 4.7.1 to 4.8.0. ([\matrix-org#16341](matrix-org#16341))

@jcgruenhage

No significant changes since 1.93.0rc1. The following issues are fixed in 1.93.0 (and RCs). - [GHSA-4f74-84v3-j9q5](GHSA-4f74-84v3-j9q5) / [CVE-2023-41335](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-41335) — Low Severity Temporary storage of plaintext passwords during password changes. - [GHSA-7565-cq32-vx2x](GHSA-7565-cq32-vx2x) / [CVE-2023-42453](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42453) — Low Severity Improper validation of receipts allows forged read receipts. See the advisories for more details. If you have any questions, email security@matrix.org. - Add automatic purge after all users have forgotten a room. ([\matrix-org#15488](matrix-org#15488)) - Restore room purge/shutdown after a Synapse restart. ([\matrix-org#15488](matrix-org#15488)) - Support resolving homeservers using `matrix-fed` DNS SRV records from [MSC4040](matrix-org/matrix-spec-proposals#4040). ([\matrix-org#16137](matrix-org#16137)) - Add the ability to use `G` (GiB) and `T` (TiB) suffixes in configuration options that refer to numbers of bytes. ([\matrix-org#16219](matrix-org#16219)) - Add span information to requests sent to appservices. Contributed by MTRNord. ([\matrix-org#16227](matrix-org#16227)) - Add the ability to enable/disable registrations when using CAS. Contributed by Aurélien Grimpard. ([\matrix-org#16262](matrix-org#16262)) - Allow the `/notifications` endpoint to be routed to workers. ([\matrix-org#16265](matrix-org#16265)) - Enable users to easily unsubscribe to notifications emails via the `List-Unsubscribe` header. ([\matrix-org#16274](matrix-org#16274)) - Report whether a user is `locked` in the [List Accounts admin API](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#list-accounts), and exclude locked users by default. ([\matrix-org#16328](matrix-org#16328)) - Fix a long-standing bug where multi-device accounts could cause high load due to presence. ([\matrix-org#16066](matrix-org#16066), [\matrix-org#16170](matrix-org#16170), [\matrix-org#16171](matrix-org#16171), [\matrix-org#16172](matrix-org#16172), [\matrix-org#16174](matrix-org#16174)) - Fix a long-standing bug where appservices using [MSC2409](matrix-org/matrix-spec-proposals#2409) to receive `to_device` messages would only get messages for one user. ([\matrix-org#16251](matrix-org#16251)) - Fix bug when using workers where Synapse could end up re-requesting the same remote device repeatedly. ([\matrix-org#16252](matrix-org#16252)) - Fix long-standing bug where we kept re-requesting a remote server's key repeatedly, potentially causing delays in receiving events over federation. ([\matrix-org#16257](matrix-org#16257)) - Avoid temporary storage of sensitive information. ([\matrix-org#16272](matrix-org#16272)) - Fix bug introduced in Synapse 1.49.0 when using dehydrated devices ([MSC2697](matrix-org/matrix-spec-proposals#2697)) and refresh tokens. Contributed by Hanadi. ([\matrix-org#16288](matrix-org#16288)) - Fix a long-standing bug where invalid receipts would be accepted. ([\matrix-org#16327](matrix-org#16327)) - Use standard name for UTF-8 charset in emails. ([\matrix-org#16329](matrix-org#16329)) - Don't try refetching device lists for users on remote hosts that are marked as "down". ([\matrix-org#16298](matrix-org#16298)) - Fix typos in the documentation. ([\matrix-org#16282](matrix-org#16282)) - Link to the Alpine Linux community package for Synapse. ([\matrix-org#16304](matrix-org#16304)) - Use string for `federation_client_minimum_tls_version` documentation examples. Contributed by @jcgruenhage. ([\matrix-org#16353](matrix-org#16353)) - Allow modules to delete rooms. ([\matrix-org#15997](matrix-org#15997)) - Add GCC and GNU Make to the Nix flake development environment so that `ruff` can be compiled. ([\matrix-org#16090](matrix-org#16090), [\matrix-org#16263](matrix-org#16263)) - Fix type checking when using the new version of Twisted. ([\matrix-org#16235](matrix-org#16235)) - Delete device messages asynchronously and in staged batches using the task scheduler. ([\matrix-org#16240](matrix-org#16240), [\matrix-org#16311](matrix-org#16311), [\matrix-org#16312](matrix-org#16312), [\matrix-org#16313](matrix-org#16313)) - Bump minimum supported Rust version to 1.61.0. ([\matrix-org#16248](matrix-org#16248)) - Update rust to version 1.71.1 in the nix development environment. ([\matrix-org#16260](matrix-org#16260)) - Simplify server key storage. ([\matrix-org#16261](matrix-org#16261)) - Reduce CPU overhead of change password endpoint. ([\matrix-org#16264](matrix-org#16264)) - Stop purging from tables slated for removal. ([\matrix-org#16273](matrix-org#16273)) - Improve type hints. ([\matrix-org#16276](matrix-org#16276), [\matrix-org#16301](matrix-org#16301), [\matrix-org#16325](matrix-org#16325), [\matrix-org#16326](matrix-org#16326)) - Raise `setuptools_rust` version cap to 1.7.0. ([\matrix-org#16277](matrix-org#16277)) - Fix using the new task scheduler causing lots of CPU to be used. ([\matrix-org#16278](matrix-org#16278)) - Upgrade CI run of Python 3.12 from rc1 to rc2. ([\matrix-org#16280](matrix-org#16280)) - Include values in SQL debug when using `execute_values` with Postgres. ([\matrix-org#16281](matrix-org#16281)) - Enable additional linting checks. ([\matrix-org#16283](matrix-org#16283)) - Refactor `receipts_graph` Postgres transactions to stop error messages. ([\matrix-org#16299](matrix-org#16299)) - Small improvements to logging in replication code. ([\matrix-org#16309](matrix-org#16309)) - Remove a reference cycle in background processes. ([\matrix-org#16314](matrix-org#16314)) - Only use literal strings for background process names. ([\matrix-org#16315](matrix-org#16315)) - Refactor `get_user_by_id`. ([\matrix-org#16316](matrix-org#16316)) - Speed up task to delete to-device messages. ([\matrix-org#16318](matrix-org#16318)) - Avoid patching code in tests. ([\matrix-org#16349](matrix-org#16349)) - Test against PostgreSQL 16. ([\matrix-org#16351](matrix-org#16351)) * Bump mypy from 1.4.1 to 1.5.1. ([\matrix-org#16300](matrix-org#16300)) * Bump black from 23.7.0 to 23.9.1. ([\matrix-org#16295](matrix-org#16295)) * Bump docker/build-push-action from 4 to 5. ([\matrix-org#16336](matrix-org#16336)) * Bump docker/login-action from 2 to 3. ([\matrix-org#16339](matrix-org#16339)) * Bump docker/metadata-action from 4 to 5. ([\matrix-org#16337](matrix-org#16337)) * Bump docker/setup-qemu-action from 2 to 3. ([\matrix-org#16338](matrix-org#16338)) * Bump furo from 2023.8.19 to 2023.9.10. ([\matrix-org#16340](matrix-org#16340)) * Bump gitpython from 3.1.32 to 3.1.35. ([\matrix-org#16267](matrix-org#16267), [\matrix-org#16279](matrix-org#16279)) * Bump mypy-zope from 1.0.0 to 1.0.1. ([\matrix-org#16291](matrix-org#16291)) * Bump pillow from 10.0.0 to 10.0.1. ([\matrix-org#16344](matrix-org#16344)) * Bump regex from 1.9.4 to 1.9.5. ([\matrix-org#16233](matrix-org#16233)) * Bump ruff from 0.0.286 to 0.0.290. ([\matrix-org#16342](matrix-org#16342)) * Bump serde_json from 1.0.105 to 1.0.107. ([\matrix-org#16296](matrix-org#16296), [\matrix-org#16345](matrix-org#16345)) * Bump twisted from 22.10.0 to 23.8.0. ([\matrix-org#16235](matrix-org#16235)) * Bump types-pillow from 10.0.0.2 to 10.0.0.3. ([\matrix-org#16293](matrix-org#16293)) * Bump types-setuptools from 68.0.0.3 to 68.2.0.0. ([\matrix-org#16292](matrix-org#16292)) * Bump typing-extensions from 4.7.1 to 4.8.0. ([\matrix-org#16341](matrix-org#16341)) # -----BEGIN PGP SIGNATURE----- # # iQFEBAABCgAuFiEEBTGR3/RnAzBGUif3pULk7RsPrAkFAmUS8iEQHGVyaWtAbWF0 # cml4Lm9yZwAKCRClQuTtGw+sCXFgB/912+T+BydS290UECCXp9kpRB5xo3aWe8mX # NCx9Oor1TRLBpLhlQWk786gP1Q9JAQpmA4z6kovjKaLG1b4oLbZNjbPG4hEYc8ow # /rVzGor52pfyS7uS5GW+rRmapcw4AYND6hA9XGELupf2joC8LXioSCEVG4cxwD8E # IgIbLc87C7KpaUkNbDEz3jzZ3/BVRGcIYyhF3zTK2ZApvH2qsegq8wKYx4EYJnfh # 87DXtTCNwA+bW6XZYPtUwPKjZ+TGB11IizxmQySGLbAxvH+GUan8X8TizGyxaqaA # FDk3yMBbUo0R7ljDgL5YsZXT6qsZz+IBz/bsMzSbZ39f/yEUqHak # =1/pL # -----END PGP SIGNATURE----- # gpg: Signature made Tue Sep 26 16:00:49 2023 BST # gpg: using RSA key 053191DFF4670330465227F7A542E4ED1B0FAC09 # gpg: issuer "erik@matrix.org" # gpg: Can't check signature: No public key # Conflicts: # .github/workflows/docker.yml # .github/workflows/push_complement_image.yml # .github/workflows/release-artifacts.yml # .github/workflows/tests.yml # poetry.lock # synapse/appservice/scheduler.py # synapse/handlers/pagination.py # synapse/handlers/room.py # synapse/rest/client/account_data.py # tests/rest/client/test_receipts.py

richvdh · 2024-04-29T16:52:30Z

@uhoreg should we close this, since we're now reasonably committed to MSC3814?

uhoreg · 2024-05-02T16:58:54Z

Closed in favour of #3814

initial version of device dehydration

99a1b8d

uhoreg changed the title ~~[WIP] MSCxxxx: Device dehydration~~ [WIP] MSC2697: Device dehydration Jul 24, 2020

use MSC number

30864b5

uhoreg mentioned this pull request Jul 24, 2020

[WIP] device dehydration matrix-org/synapse#7955

Closed

ara4n reviewed Jul 25, 2020

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