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![]() =========================== No significant changes since 1.12.0rc1. Debian packages and Docker images are rebuilt using the latest versions of dependency libraries, including Twisted 20.3.0. **Please see security advisory below**. Security advisory ----------------- Synapse may be vulnerable to request-smuggling attacks when it is used with a reverse-proxy. The vulnerabilties are fixed in Twisted 20.3.0, and are described in [CVE-2020-10108](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10108) and [CVE-2020-10109](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10109). For a good introduction to this class of request-smuggling attacks, see https://portswigger.net/research/http-desync-attacks-request-smuggling-reborn. We are not aware of these vulnerabilities being exploited in the wild, and do not believe that they are exploitable with current versions of any reverse proxies. Nevertheless, we recommend that all Synapse administrators ensure that they have the latest versions of the Twisted library to ensure that their installation remains secure. * Administrators using the [`matrix.org` Docker image](https://hub.docker.com/r/matrixdotorg/synapse/) or the [Debian/Ubuntu packages from `matrix.org`](https://github.com/matrix-org/synapse/blob/master/INSTALL.md#matrixorg-packages) should ensure that they have version 1.12.0 installed: these images include Twisted 20.3.0. * Administrators who have [installed Synapse from source](https://github.com/matrix-org/synapse/blob/master/INSTALL.md#installing-from-source) should upgrade Twisted within their virtualenv by running: ```sh <path_to_virtualenv>/bin/pip install 'Twisted>=20.3.0' ``` * Administrators who have installed Synapse from distribution packages should consult the information from their distributions. The `matrix.org` Synapse instance was not vulnerable to these vulnerabilities. Advance notice of change to the default `git` branch for Synapse ---------------------------------------------------------------- Currently, the default `git` branch for Synapse is `master`, which tracks the latest release. After the release of Synapse 1.13.0, we intend to change this default to `develop`, which is the development tip. This is more consistent with common practice and modern `git` usage. Although we try to keep `develop` in a stable state, there may be occasions where regressions creep in. Developers and distributors who have scripts which run builds using the default branch of `Synapse` should therefore consider pinning their scripts to `master`. Synapse 1.12.0rc1 (2020-03-19) ============================== Features -------- - Changes related to room alias management ([MSC2432](https://github.com/matrix-org/matrix-doc/pull/2432)): - Publishing/removing a room from the room directory now requires the user to have a power level capable of modifying the canonical alias, instead of the room aliases. ([\#6965](https://github.com/matrix-org/synapse/issues/6965)) - Validate the `alt_aliases` property of canonical alias events. ([\#6971](https://github.com/matrix-org/synapse/issues/6971)) - Users with a power level sufficient to modify the canonical alias of a room can now delete room aliases. ([\#6986](https://github.com/matrix-org/synapse/issues/6986)) - Implement updated authorization rules and redaction rules for aliases events, from [MSC2261](https://github.com/matrix-org/matrix-doc/pull/2261) and [MSC2432](https://github.com/matrix-org/matrix-doc/pull/2432). ([\#7037](https://github.com/matrix-org/synapse/issues/7037)) - Stop sending m.room.aliases events during room creation and upgrade. ([\#6941](https://github.com/matrix-org/synapse/issues/6941)) - Synapse no longer uses room alias events to calculate room names for push notifications. ([\#6966](https://github.com/matrix-org/synapse/issues/6966)) - The room list endpoint no longer returns a list of aliases. ([\#6970](https://github.com/matrix-org/synapse/issues/6970)) - Remove special handling of aliases events from [MSC2260](https://github.com/matrix-org/matrix-doc/pull/2260) added in v1.10.0rc1. ([\#7034](https://github.com/matrix-org/synapse/issues/7034)) - Expose the `synctl`, `hash_password` and `generate_config` commands in the snapcraft package. Contributed by @devec0. ([\#6315](https://github.com/matrix-org/synapse/issues/6315)) - Check that server_name is correctly set before running database updates. ([\#6982](https://github.com/matrix-org/synapse/issues/6982)) - Break down monthly active users by `appservice_id` and emit via Prometheus. ([\#7030](https://github.com/matrix-org/synapse/issues/7030)) - Render a configurable and comprehensible error page if something goes wrong during the SAML2 authentication process. ([\#7058](https://github.com/matrix-org/synapse/issues/7058), [\#7067](https://github.com/matrix-org/synapse/issues/7067)) - Add an optional parameter to control whether other sessions are logged out when a user's password is modified. ([\#7085](https://github.com/matrix-org/synapse/issues/7085)) - Add prometheus metrics for the number of active pushers. ([\#7103](https://github.com/matrix-org/synapse/issues/7103), [\#7106](https://github.com/matrix-org/synapse/issues/7106)) - Improve performance when making HTTPS requests to sygnal, sydent, etc, by sharing the SSL context object between connections. ([\#7094](https://github.com/matrix-org/synapse/issues/7094)) Bugfixes -------- - When a user's profile is updated via the admin API, also generate a displayname/avatar update for that user in each room. ([\#6572](https://github.com/matrix-org/synapse/issues/6572)) - Fix a couple of bugs in email configuration handling. ([\#6962](https://github.com/matrix-org/synapse/issues/6962)) - Fix an issue affecting worker-based deployments where replication would stop working, necessitating a full restart, after joining a large room. ([\#6967](https://github.com/matrix-org/synapse/issues/6967)) - Fix `duplicate key` error which was logged when rejoining a room over federation. ([\#6968](https://github.com/matrix-org/synapse/issues/6968)) - Prevent user from setting 'deactivated' to anything other than a bool on the v2 PUT /users Admin API. ([\#6990](https://github.com/matrix-org/synapse/issues/6990)) - Fix py35-old CI by using native tox package. ([\#7018](https://github.com/matrix-org/synapse/issues/7018)) - Fix a bug causing `org.matrix.dummy_event` to be included in responses from `/sync`. ([\#7035](https://github.com/matrix-org/synapse/issues/7035)) - Fix a bug that renders UTF-8 text files incorrectly when loaded from media. Contributed by @TheStranjer. ([\#7044](https://github.com/matrix-org/synapse/issues/7044)) - Fix a bug that would cause Synapse to respond with an error about event visibility if a client tried to request the state of a room at a given token. ([\#7066](https://github.com/matrix-org/synapse/issues/7066)) - Repair a data-corruption issue which was introduced in Synapse 1.10, and fixed in Synapse 1.11, and which could cause `/sync` to return with 404 errors about missing events and unknown rooms. ([\#7070](https://github.com/matrix-org/synapse/issues/7070)) - Fix a bug causing account validity renewal emails to be sent even if the feature is turned off in some cases. ([\#7074](https://github.com/matrix-org/synapse/issues/7074)) Improved Documentation ---------------------- - Updated CentOS8 install instructions. Contributed by Richard Kellner. ([\#6925](https://github.com/matrix-org/synapse/issues/6925)) - Fix `POSTGRES_INITDB_ARGS` in the `contrib/docker/docker-compose.yml` example docker-compose configuration. ([\#6984](https://github.com/matrix-org/synapse/issues/6984)) - Change date in [INSTALL.md](./INSTALL.md#tls-certificates) for last date of getting TLS certificates to November 2019. ([\#7015](https://github.com/matrix-org/synapse/issues/7015)) - Document that the fallback auth endpoints must be routed to the same worker node as the register endpoints. ([\#7048](https://github.com/matrix-org/synapse/issues/7048)) Deprecations and Removals ------------------------- - Remove the unused query_auth federation endpoint per [MSC2451](https://github.com/matrix-org/matrix-doc/pull/2451). ([\#7026](https://github.com/matrix-org/synapse/issues/7026)) Internal Changes ---------------- - Add type hints to `logging/context.py`. ([\#6309](https://github.com/matrix-org/synapse/issues/6309)) - Add some clarifications to `README.md` in the database schema directory. ([\#6615](https://github.com/matrix-org/synapse/issues/6615)) - Refactoring work in preparation for changing the event redaction algorithm. ([\#6874](https://github.com/matrix-org/synapse/issues/6874), [\#6875](https://github.com/matrix-org/synapse/issues/6875), [\#6983](https://github.com/matrix-org/synapse/issues/6983), [\#7003](https://github.com/matrix-org/synapse/issues/7003)) - Improve performance of v2 state resolution for large rooms. ([\#6952](https://github.com/matrix-org/synapse/issues/6952), [\#7095](https://github.com/matrix-org/synapse/issues/7095)) - Reduce time spent doing GC, by freezing objects on startup. ([\#6953](https://github.com/matrix-org/synapse/issues/6953)) - Minor perfermance fixes to `get_auth_chain_ids`. ([\#6954](https://github.com/matrix-org/synapse/issues/6954)) - Don't record remote cross-signing keys in the `devices` table. ([\#6956](https://github.com/matrix-org/synapse/issues/6956)) - Use flake8-comprehensions to enforce good hygiene of list/set/dict comprehensions. ([\#6957](https://github.com/matrix-org/synapse/issues/6957)) - Merge worker apps together. ([\#6964](https://github.com/matrix-org/synapse/issues/6964), [\#7002](https://github.com/matrix-org/synapse/issues/7002), [\#7055](https://github.com/matrix-org/synapse/issues/7055), [\#7104](https://github.com/matrix-org/synapse/issues/7104)) - Remove redundant `store_room` call from `FederationHandler._process_received_pdu`. ([\#6979](https://github.com/matrix-org/synapse/issues/6979)) - Update warning for incorrect database collation/ctype to include link to documentation. ([\#6985](https://github.com/matrix-org/synapse/issues/6985)) - Add some type annotations to the database storage classes. ([\#6987](https://github.com/matrix-org/synapse/issues/6987)) - Port `synapse.handlers.presence` to async/await. ([\#6991](https://github.com/matrix-org/synapse/issues/6991), [\#7019](https://github.com/matrix-org/synapse/issues/7019)) - Add some type annotations to the federation base & client classes. ([\#6995](https://github.com/matrix-org/synapse/issues/6995)) - Port `synapse.rest.keys` to async/await. ([\#7020](https://github.com/matrix-org/synapse/issues/7020)) - Add a type check to `is_verified` when processing room keys. ([\#7045](https://github.com/matrix-org/synapse/issues/7045)) - Add type annotations and comments to the auth handler. ([\#7063](https://github.com/matrix-org/synapse/issues/7063)) -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEv27Axt/F4vrTL/8QOSor00I9eP8FAl54vN0ACgkQOSor00I9 eP/LOgf/U22VypPu2Cl4vofxigeeUL+ph0gEQDCsF7i3EPi9ObeTi4aUggC95dBs MY4JQENmVrk1NhVWQpC08mjehsr4xUzJuwnPPIeGQ6X5U/2BS4YUasxOt9A+iLUz 8IxTzUgx4T+CTfibZvn6xdE/tZK/b2N3BoOikesutD2aQGC5Fm6w2HReoY4Qrdgw AwHlsIV22PYgEn0RL5y6DJ2NUU9SdeSmPjKNe+R1rHDlTpvH7LSyINhOFkYDgRPY xmlH+Ek5+7vLi3AlWg6pA001mMWGADlC4T84URcf1fQv6hXT1iM+A9CqC57jGlfT nHDphCtz0Uk9kmgT4To+hclLDWecYw== =iSEk -----END PGP SIGNATURE----- Merge tag 'v1.12.0' Synapse 1.12.0 (2020-03-23) =========================== No significant changes since 1.12.0rc1. Debian packages and Docker images are rebuilt using the latest versions of dependency libraries, including Twisted 20.3.0. **Please see security advisory below**. Security advisory ----------------- Synapse may be vulnerable to request-smuggling attacks when it is used with a reverse-proxy. The vulnerabilties are fixed in Twisted 20.3.0, and are described in [CVE-2020-10108](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10108) and [CVE-2020-10109](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10109). For a good introduction to this class of request-smuggling attacks, see https://portswigger.net/research/http-desync-attacks-request-smuggling-reborn. We are not aware of these vulnerabilities being exploited in the wild, and do not believe that they are exploitable with current versions of any reverse proxies. Nevertheless, we recommend that all Synapse administrators ensure that they have the latest versions of the Twisted library to ensure that their installation remains secure. * Administrators using the [`matrix.org` Docker image](https://hub.docker.com/r/matrixdotorg/synapse/) or the [Debian/Ubuntu packages from `matrix.org`](https://github.com/matrix-org/synapse/blob/master/INSTALL.md#matrixorg-packages) should ensure that they have version 1.12.0 installed: these images include Twisted 20.3.0. * Administrators who have [installed Synapse from source](https://github.com/matrix-org/synapse/blob/master/INSTALL.md#installing-from-source) should upgrade Twisted within their virtualenv by running: ```sh <path_to_virtualenv>/bin/pip install 'Twisted>=20.3.0' ``` * Administrators who have installed Synapse from distribution packages should consult the information from their distributions. The `matrix.org` Synapse instance was not vulnerable to these vulnerabilities. Advance notice of change to the default `git` branch for Synapse ---------------------------------------------------------------- Currently, the default `git` branch for Synapse is `master`, which tracks the latest release. After the release of Synapse 1.13.0, we intend to change this default to `develop`, which is the development tip. This is more consistent with common practice and modern `git` usage. Although we try to keep `develop` in a stable state, there may be occasions where regressions creep in. Developers and distributors who have scripts which run builds using the default branch of `Synapse` should therefore consider pinning their scripts to `master`. Synapse 1.12.0rc1 (2020-03-19) ============================== Features -------- - Changes related to room alias management ([MSC2432](https://github.com/matrix-org/matrix-doc/pull/2432)): - Publishing/removing a room from the room directory now requires the user to have a power level capable of modifying the canonical alias, instead of the room aliases. ([\#6965](https://github.com/matrix-org/synapse/issues/6965)) - Validate the `alt_aliases` property of canonical alias events. ([\#6971](https://github.com/matrix-org/synapse/issues/6971)) - Users with a power level sufficient to modify the canonical alias of a room can now delete room aliases. ([\#6986](https://github.com/matrix-org/synapse/issues/6986)) - Implement updated authorization rules and redaction rules for aliases events, from [MSC2261](https://github.com/matrix-org/matrix-doc/pull/2261) and [MSC2432](https://github.com/matrix-org/matrix-doc/pull/2432). ([\#7037](https://github.com/matrix-org/synapse/issues/7037)) - Stop sending m.room.aliases events during room creation and upgrade. ([\#6941](https://github.com/matrix-org/synapse/issues/6941)) - Synapse no longer uses room alias events to calculate room names for push notifications. ([\#6966](https://github.com/matrix-org/synapse/issues/6966)) - The room list endpoint no longer returns a list of aliases. ([\#6970](https://github.com/matrix-org/synapse/issues/6970)) - Remove special handling of aliases events from [MSC2260](https://github.com/matrix-org/matrix-doc/pull/2260) added in v1.10.0rc1. ([\#7034](https://github.com/matrix-org/synapse/issues/7034)) - Expose the `synctl`, `hash_password` and `generate_config` commands in the snapcraft package. Contributed by @devec0. ([\#6315](https://github.com/matrix-org/synapse/issues/6315)) - Check that server_name is correctly set before running database updates. ([\#6982](https://github.com/matrix-org/synapse/issues/6982)) - Break down monthly active users by `appservice_id` and emit via Prometheus. ([\#7030](https://github.com/matrix-org/synapse/issues/7030)) - Render a configurable and comprehensible error page if something goes wrong during the SAML2 authentication process. ([\#7058](https://github.com/matrix-org/synapse/issues/7058), [\#7067](https://github.com/matrix-org/synapse/issues/7067)) - Add an optional parameter to control whether other sessions are logged out when a user's password is modified. ([\#7085](https://github.com/matrix-org/synapse/issues/7085)) - Add prometheus metrics for the number of active pushers. ([\#7103](https://github.com/matrix-org/synapse/issues/7103), [\#7106](https://github.com/matrix-org/synapse/issues/7106)) - Improve performance when making HTTPS requests to sygnal, sydent, etc, by sharing the SSL context object between connections. ([\#7094](https://github.com/matrix-org/synapse/issues/7094)) Bugfixes -------- - When a user's profile is updated via the admin API, also generate a displayname/avatar update for that user in each room. ([\#6572](https://github.com/matrix-org/synapse/issues/6572)) - Fix a couple of bugs in email configuration handling. ([\#6962](https://github.com/matrix-org/synapse/issues/6962)) - Fix an issue affecting worker-based deployments where replication would stop working, necessitating a full restart, after joining a large room. ([\#6967](https://github.com/matrix-org/synapse/issues/6967)) - Fix `duplicate key` error which was logged when rejoining a room over federation. ([\#6968](https://github.com/matrix-org/synapse/issues/6968)) - Prevent user from setting 'deactivated' to anything other than a bool on the v2 PUT /users Admin API. ([\#6990](https://github.com/matrix-org/synapse/issues/6990)) - Fix py35-old CI by using native tox package. ([\#7018](https://github.com/matrix-org/synapse/issues/7018)) - Fix a bug causing `org.matrix.dummy_event` to be included in responses from `/sync`. ([\#7035](https://github.com/matrix-org/synapse/issues/7035)) - Fix a bug that renders UTF-8 text files incorrectly when loaded from media. Contributed by @TheStranjer. ([\#7044](https://github.com/matrix-org/synapse/issues/7044)) - Fix a bug that would cause Synapse to respond with an error about event visibility if a client tried to request the state of a room at a given token. ([\#7066](https://github.com/matrix-org/synapse/issues/7066)) - Repair a data-corruption issue which was introduced in Synapse 1.10, and fixed in Synapse 1.11, and which could cause `/sync` to return with 404 errors about missing events and unknown rooms. ([\#7070](https://github.com/matrix-org/synapse/issues/7070)) - Fix a bug causing account validity renewal emails to be sent even if the feature is turned off in some cases. ([\#7074](https://github.com/matrix-org/synapse/issues/7074)) Improved Documentation ---------------------- - Updated CentOS8 install instructions. Contributed by Richard Kellner. ([\#6925](https://github.com/matrix-org/synapse/issues/6925)) - Fix `POSTGRES_INITDB_ARGS` in the `contrib/docker/docker-compose.yml` example docker-compose configuration. ([\#6984](https://github.com/matrix-org/synapse/issues/6984)) - Change date in [INSTALL.md](./INSTALL.md#tls-certificates) for last date of getting TLS certificates to November 2019. ([\#7015](https://github.com/matrix-org/synapse/issues/7015)) - Document that the fallback auth endpoints must be routed to the same worker node as the register endpoints. ([\#7048](https://github.com/matrix-org/synapse/issues/7048)) Deprecations and Removals ------------------------- - Remove the unused query_auth federation endpoint per [MSC2451](https://github.com/matrix-org/matrix-doc/pull/2451). ([\#7026](https://github.com/matrix-org/synapse/issues/7026)) Internal Changes ---------------- - Add type hints to `logging/context.py`. ([\#6309](https://github.com/matrix-org/synapse/issues/6309)) - Add some clarifications to `README.md` in the database schema directory. ([\#6615](https://github.com/matrix-org/synapse/issues/6615)) - Refactoring work in preparation for changing the event redaction algorithm. ([\#6874](https://github.com/matrix-org/synapse/issues/6874), [\#6875](https://github.com/matrix-org/synapse/issues/6875), [\#6983](https://github.com/matrix-org/synapse/issues/6983), [\#7003](https://github.com/matrix-org/synapse/issues/7003)) - Improve performance of v2 state resolution for large rooms. ([\#6952](https://github.com/matrix-org/synapse/issues/6952), [\#7095](https://github.com/matrix-org/synapse/issues/7095)) - Reduce time spent doing GC, by freezing objects on startup. ([\#6953](https://github.com/matrix-org/synapse/issues/6953)) - Minor perfermance fixes to `get_auth_chain_ids`. ([\#6954](https://github.com/matrix-org/synapse/issues/6954)) - Don't record remote cross-signing keys in the `devices` table. ([\#6956](https://github.com/matrix-org/synapse/issues/6956)) - Use flake8-comprehensions to enforce good hygiene of list/set/dict comprehensions. ([\#6957](https://github.com/matrix-org/synapse/issues/6957)) - Merge worker apps together. ([\#6964](https://github.com/matrix-org/synapse/issues/6964), [\#7002](https://github.com/matrix-org/synapse/issues/7002), [\#7055](https://github.com/matrix-org/synapse/issues/7055), [\#7104](https://github.com/matrix-org/synapse/issues/7104)) - Remove redundant `store_room` call from `FederationHandler._process_received_pdu`. ([\#6979](https://github.com/matrix-org/synapse/issues/6979)) - Update warning for incorrect database collation/ctype to include link to documentation. ([\#6985](https://github.com/matrix-org/synapse/issues/6985)) - Add some type annotations to the database storage classes. ([\#6987](https://github.com/matrix-org/synapse/issues/6987)) - Port `synapse.handlers.presence` to async/await. ([\#6991](https://github.com/matrix-org/synapse/issues/6991), [\#7019](https://github.com/matrix-org/synapse/issues/7019)) - Add some type annotations to the federation base & client classes. ([\#6995](https://github.com/matrix-org/synapse/issues/6995)) - Port `synapse.rest.keys` to async/await. ([\#7020](https://github.com/matrix-org/synapse/issues/7020)) - Add a type check to `is_verified` when processing room keys. ([\#7045](https://github.com/matrix-org/synapse/issues/7045)) - Add type annotations and comments to the auth handler. ([\#7063](https://github.com/matrix-org/synapse/issues/7063)) |
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.github | ||
changelog.d | ||
contrib | ||
debian | ||
demo | ||
docker | ||
docs | ||
scripts | ||
scripts-dev | ||
snap | ||
synapse | ||
synmark | ||
tests | ||
.codecov.yml | ||
.coveragerc | ||
.dockerignore | ||
.editorconfig | ||
.gitignore | ||
AUTHORS.rst | ||
CHANGES.md | ||
CONTRIBUTING.md | ||
INSTALL.md | ||
LICENSE | ||
MANIFEST.in | ||
mypy.ini | ||
pylint.cfg | ||
pyproject.toml | ||
README.rst | ||
setup.cfg | ||
setup.py | ||
synctl | ||
sytest-blacklist | ||
test_postgresql.sh | ||
tox.ini | ||
UPGRADE.rst |
.. contents:: Introduction ============ Matrix is an ambitious new ecosystem for open federated Instant Messaging and VoIP. The basics you need to know to get up and running are: - Everything in Matrix happens in a room. Rooms are distributed and do not exist on any single server. Rooms can be located using convenience aliases like ``#matrix:matrix.org`` or ``#test:localhost:8448``. - Matrix user IDs look like ``@matthew:matrix.org`` (although in the future you will normally refer to yourself and others using a third party identifier (3PID): email address, phone number, etc rather than manipulating Matrix user IDs) The overall architecture is:: client <----> homeserver <=====================> homeserver <----> client https://somewhere.org/_matrix https://elsewhere.net/_matrix ``#matrix:matrix.org`` is the official support room for Matrix, and can be accessed by any client from https://matrix.org/docs/projects/try-matrix-now.html or via IRC bridge at irc://irc.freenode.net/matrix. Synapse is currently in rapid development, but as of version 0.5 we believe it is sufficiently stable to be run as an internet-facing service for real usage! About Matrix ============ Matrix specifies a set of pragmatic RESTful HTTP JSON APIs as an open standard, which handle: - Creating and managing fully distributed chat rooms with no single points of control or failure - Eventually-consistent cryptographically secure synchronisation of room state across a global open network of federated servers and services - Sending and receiving extensible messages in a room with (optional) end-to-end encryption[1] - Inviting, joining, leaving, kicking, banning room members - Managing user accounts (registration, login, logout) - Using 3rd Party IDs (3PIDs) such as email addresses, phone numbers, Facebook accounts to authenticate, identify and discover users on Matrix. - Placing 1:1 VoIP and Video calls These APIs are intended to be implemented on a wide range of servers, services and clients, letting developers build messaging and VoIP functionality on top of the entirely open Matrix ecosystem rather than using closed or proprietary solutions. The hope is for Matrix to act as the building blocks for a new generation of fully open and interoperable messaging and VoIP apps for the internet. Synapse is a reference "homeserver" implementation of Matrix from the core development team at matrix.org, written in Python/Twisted. It is intended to showcase the concept of Matrix and let folks see the spec in the context of a codebase and let you run your own homeserver and generally help bootstrap the ecosystem. In Matrix, every user runs one or more Matrix clients, which connect through to a Matrix homeserver. The homeserver stores all their personal chat history and user account information - much as a mail client connects through to an IMAP/SMTP server. Just like email, you can either run your own Matrix homeserver and control and own your own communications and history or use one hosted by someone else (e.g. matrix.org) - there is no single point of control or mandatory service provider in Matrix, unlike WhatsApp, Facebook, Hangouts, etc. We'd like to invite you to join #matrix:matrix.org (via https://matrix.org/docs/projects/try-matrix-now.html), run a homeserver, take a look at the `Matrix spec <https://matrix.org/docs/spec>`_, and experiment with the `APIs <https://matrix.org/docs/api>`_ and `Client SDKs <https://matrix.org/docs/projects/try-matrix-now.html#client-sdks>`_. Thanks for using Matrix! [1] End-to-end encryption is currently in beta: `blog post <https://matrix.org/blog/2016/11/21/matrixs-olm-end-to-end-encryption-security-assessment-released-and-implemented-cross-platform-on-riot-at-last>`_. Synapse Installation ==================== .. _federation: * For details on how to install synapse, see `<INSTALL.md>`_. * For specific details on how to configure Synapse for federation see `docs/federate.md <docs/federate.md>`_ Connecting to Synapse from a client =================================== The easiest way to try out your new Synapse installation is by connecting to it from a web client. Unless you are running a test instance of Synapse on your local machine, in general, you will need to enable TLS support before you can successfully connect from a client: see `<INSTALL.md#tls-certificates>`_. An easy way to get started is to login or register via Riot at https://riot.im/app/#/login or https://riot.im/app/#/register respectively. You will need to change the server you are logging into from ``matrix.org`` and instead specify a Homeserver URL of ``https://<server_name>:8448`` (or just ``https://<server_name>`` if you are using a reverse proxy). (Leave the identity server as the default - see `Identity servers`_.) If you prefer to use another client, refer to our `client breakdown <https://matrix.org/docs/projects/clients-matrix>`_. If all goes well you should at least be able to log in, create a room, and start sending messages. .. _`client-user-reg`: Registering a new user from a client ------------------------------------ By default, registration of new users via Matrix clients is disabled. To enable it, specify ``enable_registration: true`` in ``homeserver.yaml``. (It is then recommended to also set up CAPTCHA - see `<docs/CAPTCHA_SETUP.md>`_.) Once ``enable_registration`` is set to ``true``, it is possible to register a user via `riot.im <https://riot.im/app/#/register>`_ or other Matrix clients. Your new user name will be formed partly from the ``server_name``, and partly from a localpart you specify when you create the account. Your name will take the form of:: @localpart:my.domain.name (pronounced "at localpart on my dot domain dot name"). As when logging in, you will need to specify a "Custom server". Specify your desired ``localpart`` in the 'User name' box. ACME setup ========== For details on having Synapse manage your federation TLS certificates automatically, please see `<docs/ACME.md>`_. Security Note ============= Matrix serves raw user generated data in some APIs - specifically the `content repository endpoints <https://matrix.org/docs/spec/client_server/latest.html#get-matrix-media-r0-download-servername-mediaid>`_. Whilst we have tried to mitigate against possible XSS attacks (e.g. https://github.com/matrix-org/synapse/pull/1021) we recommend running matrix homeservers on a dedicated domain name, to limit any malicious user generated content served to web browsers a matrix API from being able to attack webapps hosted on the same domain. This is particularly true of sharing a matrix webclient and server on the same domain. See https://github.com/vector-im/riot-web/issues/1977 and https://developer.github.com/changes/2014-04-25-user-content-security for more details. Upgrading an existing Synapse ============================= The instructions for upgrading synapse are in `UPGRADE.rst`_. Please check these instructions as upgrading may require extra steps for some versions of synapse. .. _UPGRADE.rst: UPGRADE.rst Using PostgreSQL ================ Synapse offers two database engines: * `SQLite <https://sqlite.org/>`_ * `PostgreSQL <https://www.postgresql.org>`_ By default Synapse uses SQLite in and doing so trades performance for convenience. SQLite is only recommended in Synapse for testing purposes or for servers with light workloads. Almost all installations should opt to use PostreSQL. Advantages include: * significant performance improvements due to the superior threading and caching model, smarter query optimiser * allowing the DB to be run on separate hardware * allowing basic active/backup high-availability with a "hot spare" synapse pointing at the same DB master, as well as enabling DB replication in synapse itself. For information on how to install and use PostgreSQL, please see `docs/postgres.md <docs/postgres.md>`_. .. _reverse-proxy: Using a reverse proxy with Synapse ================================== It is recommended to put a reverse proxy such as `nginx <https://nginx.org/en/docs/http/ngx_http_proxy_module.html>`_, `Apache <https://httpd.apache.org/docs/current/mod/mod_proxy_http.html>`_, `Caddy <https://caddyserver.com/docs/proxy>`_ or `HAProxy <https://www.haproxy.org/>`_ in front of Synapse. One advantage of doing so is that it means that you can expose the default https port (443) to Matrix clients without needing to run Synapse with root privileges. For information on configuring one, see `<docs/reverse_proxy.md>`_. Identity Servers ================ Identity servers have the job of mapping email addresses and other 3rd Party IDs (3PIDs) to Matrix user IDs, as well as verifying the ownership of 3PIDs before creating that mapping. **They are not where accounts or credentials are stored - these live on home servers. Identity Servers are just for mapping 3rd party IDs to matrix IDs.** This process is very security-sensitive, as there is obvious risk of spam if it is too easy to sign up for Matrix accounts or harvest 3PID data. In the longer term, we hope to create a decentralised system to manage it (`matrix-doc #712 <https://github.com/matrix-org/matrix-doc/issues/712>`_), but in the meantime, the role of managing trusted identity in the Matrix ecosystem is farmed out to a cluster of known trusted ecosystem partners, who run 'Matrix Identity Servers' such as `Sydent <https://github.com/matrix-org/sydent>`_, whose role is purely to authenticate and track 3PID logins and publish end-user public keys. You can host your own copy of Sydent, but this will prevent you reaching other users in the Matrix ecosystem via their email address, and prevent them finding you. We therefore recommend that you use one of the centralised identity servers at ``https://matrix.org`` or ``https://vector.im`` for now. To reiterate: the Identity server will only be used if you choose to associate an email address with your account, or send an invite to another user via their email address. Password reset ============== If a user has registered an email address to their account using an identity server, they can request a password-reset token via clients such as Riot. A manual password reset can be done via direct database access as follows. First calculate the hash of the new password:: $ ~/synapse/env/bin/hash_password Password: Confirm password: $2a$12$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Then update the `users` table in the database:: UPDATE users SET password_hash='$2a$12$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' WHERE name='@test:test.com'; Synapse Development =================== Before setting up a development environment for synapse, make sure you have the system dependencies (such as the python header files) installed - see `Installing from source <INSTALL.md#installing-from-source>`_. To check out a synapse for development, clone the git repo into a working directory of your choice:: git clone https://github.com/matrix-org/synapse.git cd synapse Synapse has a number of external dependencies, that are easiest to install using pip and a virtualenv:: virtualenv -p python3 env source env/bin/activate python -m pip install --no-use-pep517 -e ".[all]" This will run a process of downloading and installing all the needed dependencies into a virtual env. Once this is done, you may wish to run Synapse's unit tests, to check that everything is installed as it should be:: python -m twisted.trial tests This should end with a 'PASSED' result:: Ran 143 tests in 0.601s PASSED (successes=143) Running the Integration Tests ============================= Synapse is accompanied by `SyTest <https://github.com/matrix-org/sytest>`_, a Matrix homeserver integration testing suite, which uses HTTP requests to access the API as a Matrix client would. It is able to run Synapse directly from the source tree, so installation of the server is not required. Testing with SyTest is recommended for verifying that changes related to the Client-Server API are functioning correctly. See the `installation instructions <https://github.com/matrix-org/sytest#installing>`_ for details. Building Internal API Documentation =================================== Before building internal API documentation install sphinx and sphinxcontrib-napoleon:: pip install sphinx pip install sphinxcontrib-napoleon Building internal API documentation:: python setup.py build_sphinx Troubleshooting =============== Running out of File Handles --------------------------- If synapse runs out of file handles, it typically fails badly - live-locking at 100% CPU, and/or failing to accept new TCP connections (blocking the connecting client). Matrix currently can legitimately use a lot of file handles, thanks to busy rooms like #matrix:matrix.org containing hundreds of participating servers. The first time a server talks in a room it will try to connect simultaneously to all participating servers, which could exhaust the available file descriptors between DNS queries & HTTPS sockets, especially if DNS is slow to respond. (We need to improve the routing algorithm used to be better than full mesh, but as of March 2019 this hasn't happened yet). If you hit this failure mode, we recommend increasing the maximum number of open file handles to be at least 4096 (assuming a default of 1024 or 256). This is typically done by editing ``/etc/security/limits.conf`` Separately, Synapse may leak file handles if inbound HTTP requests get stuck during processing - e.g. blocked behind a lock or talking to a remote server etc. This is best diagnosed by matching up the 'Received request' and 'Processed request' log lines and looking for any 'Processed request' lines which take more than a few seconds to execute. Please let us know at #synapse:matrix.org if you see this failure mode so we can help debug it, however. Help!! Synapse is slow and eats all my RAM/CPU! ----------------------------------------------- First, ensure you are running the latest version of Synapse, using Python 3 with a PostgreSQL database. Synapse's architecture is quite RAM hungry currently - we deliberately cache a lot of recent room data and metadata in RAM in order to speed up common requests. We'll improve this in the future, but for now the easiest way to either reduce the RAM usage (at the risk of slowing things down) is to set the almost-undocumented ``SYNAPSE_CACHE_FACTOR`` environment variable. The default is 0.5, which can be decreased to reduce RAM usage in memory constrained enviroments, or increased if performance starts to degrade. However, degraded performance due to a low cache factor, common on machines with slow disks, often leads to explosions in memory use due backlogged requests. In this case, reducing the cache factor will make things worse. Instead, try increasing it drastically. 2.0 is a good starting value. Using `libjemalloc <http://jemalloc.net/>`_ can also yield a significant improvement in overall memory use, and especially in terms of giving back RAM to the OS. To use it, the library must simply be put in the LD_PRELOAD environment variable when launching Synapse. On Debian, this can be done by installing the ``libjemalloc1`` package and adding this line to ``/etc/default/matrix-synapse``:: LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1 This can make a significant difference on Python 2.7 - it's unclear how much of an improvement it provides on Python 3.x. If you're encountering high CPU use by the Synapse process itself, you may be affected by a bug with presence tracking that leads to a massive excess of outgoing federation requests (see `discussion <https://github.com/matrix-org/synapse/issues/3971>`_). If metrics indicate that your server is also issuing far more outgoing federation requests than can be accounted for by your users' activity, this is a likely cause. The misbehavior can be worked around by setting ``use_presence: false`` in the Synapse config file. People can't accept room invitations from me -------------------------------------------- The typical failure mode here is that you send an invitation to someone to join a room or direct chat, but when they go to accept it, they get an error (typically along the lines of "Invalid signature"). They might see something like the following in their logs:: 2019-09-11 19:32:04,271 - synapse.federation.transport.server - 288 - WARNING - GET-11752 - authenticate_request failed: 401: Invalid signature for server <server> with key ed25519:a_EqML: Unable to verify signature for <server> This is normally caused by a misconfiguration in your reverse-proxy. See `<docs/reverse_proxy.md>`_ and double-check that your settings are correct.