Add caching support to media endpoints (#18235 )

We do a few things in this PR to better support caching: 1. Change `Cache-Control` header to allow intermediary proxies to cache media *only* if they revalidate on every request. This means that the intermediary cache will still send the request to Synapse but with a `If-None-Match` header, at which point Synapse can check auth and respond with a 304 and empty content. 2. Add `ETag` response header to all media responses. We hardcode this to `1` since all media is immutable (beyond being deleted). 3. Check for `If-None-Match` header (after checking for auth), and if it matches then respond with a 304 and empty body. --------- Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
Fix detection of workflow failures in the release script. (#18211 )
2025-03-14 09:45:51 +00:00 · 2025-03-13 16:28:19 +00:00 · 2025-03-13 14:52:00 +00:00 · 2025-03-13 11:56:22 +00:00 · 2025-03-13 11:48:37 +00:00 · 2025-03-13 11:44:49 +00:00
55 changed files with 1736 additions and 280 deletions
--- a/.ci/before_build_wheel.sh
+++ b/.ci/before_build_wheel.sh
@ -0,0 +1,10 @@
+#!/bin/sh
+set -xeu
+
+# On 32-bit Linux platforms, we need libatomic1 to use rustup
+if command -v yum &> /dev/null; then
+   yum install -y libatomic
+fi
+
+# Install a Rust toolchain
+curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.82.0 -y --profile minimal
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@ -30,7 +30,7 @@ jobs:
        run: docker buildx inspect

      - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.8.0
+        uses: sigstore/cosign-installer@v3.8.1

      - name: Checkout repository
        uses: actions/checkout@v4
--- a/.github/workflows/release-artifacts.yml
+++ b/.github/workflows/release-artifacts.yml
@ -139,7 +139,7 @@ jobs:
          python-version: "3.x"

      - name: Install cibuildwheel
-        run: python -m pip install cibuildwheel==2.19.1
+        run: python -m pip install cibuildwheel==2.23.0

      - name: Set up QEMU to emulate aarch64
        if: matrix.arch == 'aarch64'
--- a/CHANGES.md
+++ b/CHANGES.md
@ -1,10 +1,82 @@
+# Synapse 1.126.0 (2025-03-11)
+Administrators using the Debian/Ubuntu packages from `packages.matrix.org`, please check
+[the relevant section in the upgrade notes](https://github.com/element-hq/synapse/blob/release-v1.126/docs/upgrade.md#change-of-signing-key-expiry-date-for-the-debianubuntu-package-repository)
+as we have recently updated the expiry date on the repository's GPG signing key. The old version of the key will expire on `2025-03-15`.
+
+No significant changes since 1.126.0rc3.
+
+
+
+
+# Synapse 1.126.0rc3 (2025-03-07)
+
+### Bugfixes
+
+- Revert the background job to clear unreferenced state groups (that was introduced in v1.126.0rc1), due to [a suspected issue](https://github.com/element-hq/synapse/issues/18217) that causes increased disk usage. ([\#18222](https://github.com/element-hq/synapse/issues/18222))
+
+
+
+
+# Synapse 1.126.0rc2 (2025-03-05)
+
+
+### Internal Changes
+
+- Fix wheel building configuration in CI by installing libatomic1. ([\#18212](https://github.com/element-hq/synapse/issues/18212), [\#18213](https://github.com/element-hq/synapse/issues/18213))
+
+# Synapse 1.126.0rc1 (2025-03-04)
+
+Synapse 1.126.0rc1 was not fully released due to an error in CI.
+
+### Features
+
+- Define ratelimit configuration for delayed event management. ([\#18019](https://github.com/element-hq/synapse/issues/18019))
+- Add `form_secret_path` config option. ([\#18090](https://github.com/element-hq/synapse/issues/18090))
+- Add the `--no-secrets-in-config` command line option. ([\#18092](https://github.com/element-hq/synapse/issues/18092))
+- Add background job to clear unreferenced state groups. ([\#18154](https://github.com/element-hq/synapse/issues/18154))
+- Add support for specifying/overriding `id_token_signing_alg_values_supported` for an OpenID identity provider. ([\#18177](https://github.com/element-hq/synapse/issues/18177))
+- Add `worker_replication_secret_path` config option. ([\#18191](https://github.com/element-hq/synapse/issues/18191))
+- Add support for specifying/overriding `redirect_uri` in the authorization and token requests against an OpenID identity provider. ([\#18197](https://github.com/element-hq/synapse/issues/18197))
+
+### Bugfixes
+
+- Make sure we advertise registration as disabled when [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) is enabled. ([\#17661](https://github.com/element-hq/synapse/issues/17661))
+- Prevent suspended users from sending encrypted messages. ([\#18157](https://github.com/element-hq/synapse/issues/18157))
+- Cleanup deleted state group references. ([\#18165](https://github.com/element-hq/synapse/issues/18165))
+- Fix [MSC4108 QR-code login](https://github.com/matrix-org/matrix-spec-proposals/pull/4108) not working with some reverse-proxy setups. ([\#18178](https://github.com/element-hq/synapse/issues/18178))
+- Support device IDs that can't be represented in a scope when delegating auth to Matrix Authentication Service 0.15.0+. ([\#18174](https://github.com/element-hq/synapse/issues/18174))
+
+### Updates to the Docker image
+
+- Speed up the building of the Docker image. ([\#18038](https://github.com/element-hq/synapse/issues/18038))
+
+### Improved Documentation
+
+- Move incorrectly placed version indicator in User Event Redaction Admin API docs. ([\#18152](https://github.com/element-hq/synapse/issues/18152))
+- Document suspension Admin API. ([\#18162](https://github.com/element-hq/synapse/issues/18162))
+
+### Deprecations and Removals
+
+- Disable room list publication by default. ([\#18175](https://github.com/element-hq/synapse/issues/18175))
+
+### Updates to locked dependencies
+
+* Bump anyhow from 1.0.95 to 1.0.96. ([\#18187](https://github.com/element-hq/synapse/issues/18187))
+* Bump authlib from 1.4.0 to 1.4.1. ([\#18190](https://github.com/element-hq/synapse/issues/18190))
+* Bump click from 8.1.7 to 8.1.8. ([\#18189](https://github.com/element-hq/synapse/issues/18189))
+* Bump log from 0.4.25 to 0.4.26. ([\#18184](https://github.com/element-hq/synapse/issues/18184))
+* Bump pyo3-log from 0.12.0 to 0.12.1. ([\#18046](https://github.com/element-hq/synapse/issues/18046))
+* Bump serde from 1.0.217 to 1.0.218. ([\#18183](https://github.com/element-hq/synapse/issues/18183))
+* Bump serde_json from 1.0.138 to 1.0.139. ([\#18186](https://github.com/element-hq/synapse/issues/18186))
+* Bump sigstore/cosign-installer from 3.8.0 to 3.8.1. ([\#18185](https://github.com/element-hq/synapse/issues/18185))
+* Bump types-psycopg2 from 2.9.21.20241019 to 2.9.21.20250121. ([\#18188](https://github.com/element-hq/synapse/issues/18188))
+
+
 # Synapse 1.125.0 (2025-02-25)

 No significant changes since 1.125.0rc1.


-
-
 # Synapse 1.125.0rc1 (2025-02-18)

 ### Features
--- a/Cargo.lock
+++ b/Cargo.lock
@ -13,9 +13,9 @@ dependencies = [

 [[package]]
 name = "anyhow"
-version = "1.0.95"
+version = "1.0.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34ac096ce696dc2fcabef30516bb13c0a68a11d30131d3df6f04711467681b04"
+checksum = "dcfed56ad506cb2c684a14971b8861fdc3baaaae314b9e5f9bb532cbe3ba7a4f"

 [[package]]
 name = "arc-swap"
@ -67,9 +67,9 @@ checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"

 [[package]]
 name = "bytes"
-version = "1.10.0"
+version = "1.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f61dac84819c6588b558454b194026eb1f09c293b9036ae9b159e74e73ab6cf9"
+checksum = "d71b6127be86fdcfddb610f7182ac57211d4b18a3e9c82eb2d17662f2227ad6a"

 [[package]]
 name = "cfg-if"
@ -223,9 +223,9 @@ checksum = "ae743338b92ff9146ce83992f766a31066a91a8c84a45e0e9f21e7cf6de6d346"

 [[package]]
 name = "log"
-version = "0.4.25"
+version = "0.4.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04cbf5b083de1c7e0222a7a51dbfdba1cbe1c6ab0b15e29fff3f6c077fd9cd9f"
+checksum = "30bde2b3dc3671ae49d8e2e9f044c7c005836e7a023ee57cffa25ab82764bb9e"

 [[package]]
 name = "memchr"
@ -277,9 +277,9 @@ dependencies = [

 [[package]]
 name = "pyo3"
-version = "0.23.4"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57fe09249128b3173d092de9523eaa75136bf7ba85e0d69eca241c7939c933cc"
+checksum = "7778bffd85cf38175ac1f545509665d0b9b92a198ca7941f131f85f7a4f9a872"
 dependencies = [
 "anyhow",
 "cfg-if",
@ -296,9 +296,9 @@ dependencies = [

 [[package]]
 name = "pyo3-build-config"
-version = "0.23.4"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1cd3927b5a78757a0d71aa9dff669f903b1eb64b54142a9bd9f757f8fde65fd7"
+checksum = "94f6cbe86ef3bf18998d9df6e0f3fc1050a8c5efa409bf712e661a4366e010fb"
 dependencies = [
 "once_cell",
 "target-lexicon",
@ -306,9 +306,9 @@ dependencies = [

 [[package]]
 name = "pyo3-ffi"
-version = "0.23.4"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dab6bb2102bd8f991e7749f130a70d05dd557613e39ed2deeee8e9ca0c4d548d"
+checksum = "e9f1b4c431c0bb1c8fb0a338709859eed0d030ff6daa34368d3b152a63dfdd8d"
 dependencies = [
 "libc",
 "pyo3-build-config",
@ -316,9 +316,9 @@ dependencies = [

 [[package]]
 name = "pyo3-log"
-version = "0.12.0"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3eb421dc86d38d08e04b927b02424db480be71b777fa3a56f32e2f2a3a1a3b08"
+checksum = "be5bb22b77965a7b5394e9aae9897a0607b51df5167561ffc3b02643b4200bc7"
 dependencies = [
 "arc-swap",
 "log",
@ -327,9 +327,9 @@ dependencies = [

 [[package]]
 name = "pyo3-macros"
-version = "0.23.4"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91871864b353fd5ffcb3f91f2f703a22a9797c91b9ab497b1acac7b07ae509c7"
+checksum = "fbc2201328f63c4710f68abdf653c89d8dbc2858b88c5d88b0ff38a75288a9da"
 dependencies = [
 "proc-macro2",
 "pyo3-macros-backend",
@ -339,9 +339,9 @@ dependencies = [

 [[package]]
 name = "pyo3-macros-backend"
-version = "0.23.4"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43abc3b80bc20f3facd86cd3c60beed58c3e2aa26213f3cda368de39c60a27e4"
+checksum = "fca6726ad0f3da9c9de093d6f116a93c1a38e417ed73bf138472cf4064f72028"
 dependencies = [
 "heck",
 "proc-macro2",
@ -437,18 +437,18 @@ checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"

 [[package]]
 name = "serde"
-version = "1.0.217"
+version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+checksum = "5f0e2c6ed6606019b4e29e69dbaba95b11854410e5347d525002456dbbb786b6"
 dependencies = [
 "serde_derive",
 ]

 [[package]]
 name = "serde_derive"
-version = "1.0.217"
+version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+checksum = "5b0276cf7f2c73365f7157c8123c21cd9a50fbbd844757af28ca1f5925fc2a00"
 dependencies = [
 "proc-macro2",
 "quote",
@ -457,9 +457,9 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.138"
+version = "1.0.140"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d434192e7da787e94a6ea7e9670b26a036d0ca41e0b7efb2676dd32bae872949"
+checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
 dependencies = [
 "itoa",
 "memchr",
--- a/changelog.d/18211.misc
+++ b/changelog.d/18211.misc
@ -0,0 +1 @@
+Fix detection of workflow failures in the release script.
--- a/changelog.d/18224.doc
+++ b/changelog.d/18224.doc
@ -0,0 +1,2 @@
+Fixed a minor typo in the Synapse documentation.  
+Contributed by @karuto12.
--- a/changelog.d/18235.misc
+++ b/changelog.d/18235.misc
@ -0,0 +1 @@
+Add caching support to media endpoints.
--- a/debian/changelog
+++ b/debian/changelog
@ -1,3 +1,27 @@
+matrix-synapse-py3 (1.126.0) stable; urgency=medium
+
+  * New Synapse release 1.126.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 11 Mar 2025 13:11:29 +0000
+
+matrix-synapse-py3 (1.126.0~rc3) stable; urgency=medium
+
+  * New Synapse release 1.126.0rc3.
+
+ -- Synapse Packaging team <packages@matrix.org>  Fri, 07 Mar 2025 15:45:05 +0000
+
+matrix-synapse-py3 (1.126.0~rc2) stable; urgency=medium
+
+  * New Synapse release 1.126.0rc2.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 05 Mar 2025 14:29:12 +0000
+
+matrix-synapse-py3 (1.126.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.126.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 04 Mar 2025 13:11:51 +0000
+
 matrix-synapse-py3 (1.125.0) stable; urgency=medium

  * New Synapse release 1.125.0.
--- a/demo/start.sh
+++ b/demo/start.sh
@ -142,6 +142,9 @@ for port in 8080 8081 8082; do
 			  per_user:
 			    per_second: 1000
 			    burst_count: 1000
+			rc_delayed_event_mgmt:
+			  per_second: 1000
+			  burst_count: 1000
 			RC
 			)
            echo "${ratelimiting}" >> "$port.config"
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@ -20,45 +20,16 @@
 # `poetry export | pip install -r /dev/stdin`, but beware: we have experienced bugs in
 # in `poetry export` in the past.

+ARG DEBIAN_VERSION=bookworm
 ARG PYTHON_VERSION=3.12
+ARG POETRY_VERSION=1.8.3

 ###
 ### Stage 0: generate requirements.txt
 ###
-# We hardcode the use of Debian bookworm here because this could change upstream
-# and other Dockerfiles used for testing are expecting bookworm.
-FROM docker.io/library/python:${PYTHON_VERSION}-slim-bookworm AS requirements
-
-# RUN --mount is specific to buildkit and is documented at
-# https://github.com/moby/buildkit/blob/master/frontend/dockerfile/docs/syntax.md#build-mounts-run---mount.
-# Here we use it to set up a cache for apt (and below for pip), to improve
-# rebuild speeds on slow connections.
-RUN \
-  --mount=type=cache,target=/var/cache/apt,sharing=locked \
-  --mount=type=cache,target=/var/lib/apt,sharing=locked \
-  apt-get update -qq && apt-get install -yqq \
-  build-essential curl git libffi-dev libssl-dev pkg-config \
-  && rm -rf /var/lib/apt/lists/*
-
-# Install rust and ensure its in the PATH.
-# (Rust may be needed to compile `cryptography`---which is one of poetry's
-# dependencies---on platforms that don't have a `cryptography` wheel.
-ENV RUSTUP_HOME=/rust
-ENV CARGO_HOME=/cargo
-ENV PATH=/cargo/bin:/rust/bin:$PATH
-RUN mkdir /rust /cargo
-
-RUN curl -sSf https://sh.rustup.rs | sh -s -- -y --no-modify-path --default-toolchain stable --profile minimal
-
-# arm64 builds consume a lot of memory if `CARGO_NET_GIT_FETCH_WITH_CLI` is not
-# set to true, so we expose it as a build-arg.
-ARG CARGO_NET_GIT_FETCH_WITH_CLI=false
-ENV CARGO_NET_GIT_FETCH_WITH_CLI=$CARGO_NET_GIT_FETCH_WITH_CLI
-
-# We install poetry in its own build stage to avoid its dependencies conflicting with
-# synapse's dependencies.
-RUN --mount=type=cache,target=/root/.cache/pip \
-  pip install --user "poetry==1.3.2"
+### This stage is platform-agnostic, so we can use the build platform in case of cross-compilation.
+###
+FROM --platform=$BUILDPLATFORM ghcr.io/astral-sh/uv:python${PYTHON_VERSION}-${DEBIAN_VERSION} AS requirements

 WORKDIR /synapse

@ -75,41 +46,30 @@ ARG TEST_ONLY_SKIP_DEP_HASH_VERIFICATION
 # Instead, we'll just install what a regular `pip install` would from PyPI.
 ARG TEST_ONLY_IGNORE_POETRY_LOCKFILE

+# This silences a warning as uv isn't able to do hardlinks between its cache
+# (mounted as --mount=type=cache) and the target directory.
+ENV UV_LINK_MODE=copy
+
 # Export the dependencies, but only if we're actually going to use the Poetry lockfile.
 # Otherwise, just create an empty requirements file so that the Dockerfile can
 # proceed.
-RUN if [ -z "$TEST_ONLY_IGNORE_POETRY_LOCKFILE" ]; then \
-  /root/.local/bin/poetry export --extras all -o /synapse/requirements.txt ${TEST_ONLY_SKIP_DEP_HASH_VERIFICATION:+--without-hashes}; \
+ARG POETRY_VERSION
+RUN --mount=type=cache,target=/root/.cache/uv \
+  if [ -z "$TEST_ONLY_IGNORE_POETRY_LOCKFILE" ]; then \
+    uvx --with poetry-plugin-export==1.8.0 \
+        poetry@${POETRY_VERSION} export --extras all -o /synapse/requirements.txt ${TEST_ONLY_SKIP_DEP_HASH_VERIFICATION:+--without-hashes}; \
  else \
-  touch /synapse/requirements.txt; \
+    touch /synapse/requirements.txt; \
  fi

 ###
 ### Stage 1: builder
 ###
-FROM docker.io/library/python:${PYTHON_VERSION}-slim-bookworm AS builder
-
-# install the OS build deps
-RUN \
-  --mount=type=cache,target=/var/cache/apt,sharing=locked \
-  --mount=type=cache,target=/var/lib/apt,sharing=locked \
-  apt-get update -qq && apt-get install -yqq \
-  build-essential \
-  libffi-dev \
-  libjpeg-dev \
-  libpq-dev \
-  libssl-dev \
-  libwebp-dev \
-  libxml++2.6-dev \
-  libxslt1-dev \
-  openssl \
-  zlib1g-dev \
-  git \
-  curl \
-  libicu-dev \
-  pkg-config \
-  && rm -rf /var/lib/apt/lists/*
+FROM ghcr.io/astral-sh/uv:python${PYTHON_VERSION}-${DEBIAN_VERSION} AS builder

+# This silences a warning as uv isn't able to do hardlinks between its cache
+# (mounted as --mount=type=cache) and the target directory.
+ENV UV_LINK_MODE=copy

 # Install rust and ensure its in the PATH
 ENV RUSTUP_HOME=/rust
@ -119,7 +79,6 @@ RUN mkdir /rust /cargo

 RUN curl -sSf https://sh.rustup.rs | sh -s -- -y --no-modify-path --default-toolchain stable --profile minimal

-
 # arm64 builds consume a lot of memory if `CARGO_NET_GIT_FETCH_WITH_CLI` is not
 # set to true, so we expose it as a build-arg.
 ARG CARGO_NET_GIT_FETCH_WITH_CLI=false
@ -131,8 +90,8 @@ ENV CARGO_NET_GIT_FETCH_WITH_CLI=$CARGO_NET_GIT_FETCH_WITH_CLI
 #
 # This is aiming at installing the `[tool.poetry.depdendencies]` from pyproject.toml.
 COPY --from=requirements /synapse/requirements.txt /synapse/
-RUN --mount=type=cache,target=/root/.cache/pip \
-  pip install --prefix="/install" --no-deps --no-warn-script-location -r /synapse/requirements.txt
+RUN --mount=type=cache,target=/root/.cache/uv \
+  uv pip install --prefix="/install" --no-deps -r /synapse/requirements.txt

 # Copy over the rest of the synapse source code.
 COPY synapse /synapse/synapse/
@ -146,41 +105,85 @@ ARG TEST_ONLY_IGNORE_POETRY_LOCKFILE
 # Install the synapse package itself.
 # If we have populated requirements.txt, we don't install any dependencies
 # as we should already have those from the previous `pip install` step.
-RUN --mount=type=cache,target=/synapse/target,sharing=locked \
+RUN \
+  --mount=type=cache,target=/root/.cache/uv \
+  --mount=type=cache,target=/synapse/target,sharing=locked \
  --mount=type=cache,target=${CARGO_HOME}/registry,sharing=locked \
  if [ -z "$TEST_ONLY_IGNORE_POETRY_LOCKFILE" ]; then \
-  pip install --prefix="/install" --no-deps --no-warn-script-location /synapse[all]; \
+    uv pip install --prefix="/install" --no-deps /synapse[all]; \
  else \
-  pip install --prefix="/install" --no-warn-script-location /synapse[all]; \
+    uv pip install --prefix="/install" /synapse[all]; \
  fi

 ###
-### Stage 2: runtime
+### Stage 2: runtime dependencies download for ARM64 and AMD64
+###
+FROM --platform=$BUILDPLATFORM docker.io/library/debian:${DEBIAN_VERSION} AS runtime-deps
+
+# Tell apt to keep downloaded package files, as we're using cache mounts.
+RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
+
+# Add both target architectures
+RUN dpkg --add-architecture arm64
+RUN dpkg --add-architecture amd64
+
+# Fetch the runtime dependencies debs for both architectures
+# We do that by building a recursive list of packages we need to download with `apt-cache depends`
+# and then downloading them with `apt-get download`.
+RUN \
+  --mount=type=cache,target=/var/cache/apt,sharing=locked \
+  --mount=type=cache,target=/var/lib/apt,sharing=locked \
+  apt-get update -qq && \
+  apt-get install -y --no-install-recommends rsync && \
+  apt-cache depends --recurse --no-recommends --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances --no-pre-depends \
+      curl \
+      gosu \
+      libjpeg62-turbo \
+      libpq5 \
+      libwebp7 \
+      xmlsec1 \
+      libjemalloc2 \
+      libicu \
+    | grep '^\w' > /tmp/pkg-list && \
+  for arch in arm64 amd64; do \
+    mkdir -p /tmp/debs-${arch} && \
+    cd /tmp/debs-${arch} && \
+    apt-get download $(sed "s/$/:${arch}/" /tmp/pkg-list); \
+  done
+
+# Extract the debs for each architecture
+# On the runtime image, /lib is a symlink to /usr/lib, so we need to copy the
+# libraries to the right place, else the `COPY` won't work.
+# On amd64, we'll also have a /lib64 folder with ld-linux-x86-64.so.2, which is
+# already present in the runtime image.
+RUN \
+  for arch in arm64 amd64; do \
+    mkdir -p /install-${arch}/var/lib/dpkg/status.d/ && \
+    for deb in /tmp/debs-${arch}/*.deb; do \
+      package_name=$(dpkg-deb -I ${deb} | awk '/^ Package: .*$/ {print $2}'); \
+      echo "Extracting: ${package_name}"; \
+      dpkg --ctrl-tarfile $deb | tar -Ox ./control > /install-${arch}/var/lib/dpkg/status.d/${package_name}; \
+      dpkg --extract $deb /install-${arch}; \
+    done; \
+    rsync -avr /install-${arch}/lib/ /install-${arch}/usr/lib; \
+    rm -rf /install-${arch}/lib /install-${arch}/lib64; \
+  done
+
+
+###
+### Stage 3: runtime
 ###

-FROM docker.io/library/python:${PYTHON_VERSION}-slim-bookworm
+FROM docker.io/library/python:${PYTHON_VERSION}-slim-${DEBIAN_VERSION}
+
+ARG TARGETARCH

 LABEL org.opencontainers.image.url='https://matrix.org/docs/projects/server/synapse'
 LABEL org.opencontainers.image.documentation='https://github.com/element-hq/synapse/blob/master/docker/README.md'
 LABEL org.opencontainers.image.source='https://github.com/element-hq/synapse.git'
 LABEL org.opencontainers.image.licenses='AGPL-3.0-or-later'

-RUN \
-  --mount=type=cache,target=/var/cache/apt,sharing=locked \
-  --mount=type=cache,target=/var/lib/apt,sharing=locked \
-  apt-get update -qq && apt-get install -yqq \
-  curl \
-  gosu \
-  libjpeg62-turbo \
-  libpq5 \
-  libwebp7 \
-  xmlsec1 \
-  libjemalloc2 \
-  libicu72 \
-  libssl-dev \
-  openssl \
-  && rm -rf /var/lib/apt/lists/*
-
+COPY --from=runtime-deps /install-${TARGETARCH} /
 COPY --from=builder /install /usr/local
 COPY ./docker/start.py /start.py
 COPY ./docker/conf /conf
--- a/docker/complement/conf/workers-shared-extra.yaml.j2
+++ b/docker/complement/conf/workers-shared-extra.yaml.j2
@ -94,6 +94,10 @@ rc_presence:
    per_second: 9999
    burst_count: 9999

+rc_delayed_event_mgmt:
+  per_second: 9999
+  burst_count: 9999
+
 federation_rr_transactions_per_room_per_second: 9999

 allow_device_name_lookup_over_federation: true
@ -139,4 +143,9 @@ caches:
  sync_response_cache_duration: 0


+# Complement assumes that it can publish to the room list by default.
+room_list_publication_rules:
+  - action: allow
+
+
 {% include "shared-orig.yaml.j2" %}
--- a/docs/admin_api/user_admin_api.md
+++ b/docs/admin_api/user_admin_api.md
@ -414,6 +414,32 @@ The following actions are **NOT** performed. The list may be incomplete.
 - Remove from monthly active users
 - Remove user's consent information (consent version and timestamp)

+## Suspend/Unsuspend Account
+
+This API allows an admin to suspend/unsuspend an account. While an account is suspended, the user is 
+prohibited from sending invites, joining or knocking on rooms, sending messages, changing profile data, and redacting messages other than their own. 
+
+The api is:
+
+```
+PUT /_synapse/admin/v1/suspend/<user_id>
+```
+
+with a body of:
+
+```json
+{
+    "suspend": true
+}
+```
+
+To unsuspend a user, use the same endpoint with a body of:
+```json
+{
+  "suspend": false
+}
+```
+
 ## Reset password

 **Note:** This API is disabled when MSC3861 is enabled. [See #15582](https://github.com/matrix-org/synapse/pull/15582)
@ -1468,13 +1494,13 @@ The following JSON body parameter must be provided:
 -  `rooms` - A list of rooms to redact the user's events in. If an empty list is provided all events in all rooms
  the user is a member of will be redacted

-_Added in Synapse 1.116.0._
-
 The following JSON body parameters are optional:

 - `reason` - Reason the redaction is being requested, ie "spam", "abuse", etc. This will be included in each redaction event, and be visible to users.
 - `limit` - a limit on the number of the user's events to search for ones that can be redacted (events are redacted newest to oldest) in each room, defaults to 1000 if not provided

+_Added in Synapse 1.116.0._
+

 ## Check the status of a redaction process

--- a/docs/upgrade.md
+++ b/docs/upgrade.md
@ -117,6 +117,44 @@ each upgrade are complete before moving on to the next upgrade, to avoid
 stacking them up. You can monitor the currently running background updates with
 [the Admin API](usage/administration/admin_api/background_updates.html#status).

+# Upgrading to v1.126.0
+
+## Room list publication rules change
+
+The default [`room_list_publication_rules`] setting was changed to disallow
+anyone (except server admins) from publishing to the room list by default.
+
+This is in line with Synapse policy of locking down features by default that can
+be abused without moderation.
+
+To keep the previous behavior of allowing publication by default, add the
+following to the config:
+
+```yaml
+room_list_publication_rules:
+  - "action": "allow"
+```
+
+[`room_list_publication_rules`]: usage/configuration/config_documentation.md#room_list_publication_rules
+
+## Change of signing key expiry date for the Debian/Ubuntu package repository
+
+Administrators using the Debian/Ubuntu packages from `packages.matrix.org`,
+please be aware that we have recently updated the expiry date on the repository's GPG signing key,
+but this change must be imported into your keyring.
+
+If you have the `matrix-org-archive-keyring` package installed and it updates before the current key expires, this should
+happen automatically.
+
+Otherwise, if you see an error similar to `The following signatures were invalid: EXPKEYSIG F473DD4473365DE1`, you
+will need to get a fresh copy of the keys. You can do so with:
+
+```sh
+sudo wget -O /usr/share/keyrings/matrix-org-archive-keyring.gpg https://packages.matrix.org/debian/matrix-org-archive-keyring.gpg
+```
+
+The old version of the key will expire on `2025-03-15`.
+
 # Upgrading to v1.122.0

 ## Dropping support for PostgreSQL 11 and 12
--- a/docs/usage/configuration/config_documentation.md
+++ b/docs/usage/configuration/config_documentation.md
@ -1947,6 +1947,29 @@ rc_presence:
    burst_count: 1
 ```
 ---
+### `rc_delayed_event_mgmt`
+
+Ratelimiting settings for delayed event management.
+
+This is a ratelimiting option that ratelimits
+attempts to restart, cancel, or view delayed events
+based on the sending client's account and device ID.
+It defaults to: `per_second: 1`, `burst_count: 5`.
+
+Attempts to create or send delayed events are ratelimited not by this setting, but by `rc_message`.
+
+Setting this to a high value allows clients to make delayed event management requests often
+(such as repeatedly restarting a delayed event with a short timeout,
+or restarting several different delayed events all at once)
+without the risk of being ratelimited.
+
+Example configuration:
+```yaml
+rc_delayed_event_mgmt:
+  per_second: 2
+  burst_count: 20
+```
+---
 ### `federation_rr_transactions_per_room_per_second`

 Sets outgoing federation transaction frequency for sending read-receipts,
@ -3215,6 +3238,22 @@ Example configuration:
 ```yaml
 form_secret: <PRIVATE STRING>
 ```
+---
+### `form_secret_path`
+
+An alternative to [`form_secret`](#form_secret):
+allows the secret to be specified in an external file.
+
+The file should be a plain text file, containing only the secret.
+Synapse reads the secret from the given file once at startup.
+
+Example configuration:
+```yaml
+form_secret_path: /path/to/secrets/file
+```
+
+_Added in Synapse 1.126.0._
+
 ---
 ## Signing Keys
 Config options relating to signing keys
@ -3579,6 +3618,24 @@ Options for each entry include:
   to `auto`, which uses PKCE if supported during metadata discovery. Set to `always`
   to force enable PKCE or `never` to force disable PKCE.

+* `id_token_signing_alg_values_supported`: List of the JWS signing algorithms (`alg`
+  values) that are supported for signing the `id_token`.
+
+  This is *not* required if `discovery` is disabled. We default to supporting `RS256` in
+  the downstream usage if no algorithms are configured here or in the discovery
+  document.
+
+  According to the spec, the algorithm `"RS256"` MUST be included. The absolute rigid
+  approach would be to reject this provider as non-compliant if it's not included but we
+  simply allow whatever and see what happens (you're the one that configured the value
+  and cooperating with the identity provider).
+
+  The `alg` value `"none"` MAY be supported but can only be used if the Authorization
+  Endpoint does not include `id_token` in the `response_type` (ex.
+  `/authorize?response_type=code` where `none` can apply,
+  `/authorize?response_type=code%20id_token` where `none` can't apply) (such as when
+  using the Authorization Code Flow).
+
 * `scopes`: list of scopes to request. This should normally include the "openid"
   scope. Defaults to `["openid"]`.

@ -3605,6 +3662,13 @@ Options for each entry include:
   not included in `scopes`. Set to `userinfo_endpoint` to always use the
   userinfo endpoint.

+* `redirect_uri`: An optional string, that if set will override the `redirect_uri`
+  parameter sent in the requests to the authorization and token endpoints.
+  Useful if you want to redirect the client to another endpoint as part of the
+  OIDC login. Be aware that the client must then call Synapse's OIDC callback
+  URL (`<public_baseurl>/_synapse/client/oidc/callback`) manually afterwards.
+  Must be a valid URL including scheme and path.
+
 * `additional_authorization_parameters`: String to string dictionary that will be passed as
   additional parameters to the authorization grant URL.

@ -4227,8 +4291,8 @@ unwanted entries from being published in the public room list.

 The format of this option is the same as that for
 [`alias_creation_rules`](#alias_creation_rules): an optional list of 0 or more
-rules. By default, no list is provided, meaning that all rooms may be
-published to the room list.
+rules. By default, no list is provided, meaning that no one may publish to the
+room list (except server admins).

 Otherwise, requests to publish a room are matched against each rule in order.
 The first rule that matches decides if the request is allowed or denied. If no
@ -4254,6 +4318,10 @@ Note that the patterns match against fully qualified IDs, e.g. against
 of `alice`, `room` and `abcedgghijk`.


+_Changed in Synapse 1.126.0: The default was changed to deny publishing to the
+room list by default_
+
+
 Example configuration:

 ```yaml
@ -4466,6 +4534,22 @@ Example configuration:
 ```yaml
 worker_replication_secret: "secret_secret"
 ```
+---
+### `worker_replication_secret_path`
+
+An alternative to [`worker_replication_secret`](#worker_replication_secret):
+allows the secret to be specified in an external file.
+
+The file should be a plain text file, containing only the secret.
+Synapse reads the secret from the given file once at startup.
+
+Example configuration:
+```yaml
+worker_replication_secret_path: /path/to/secrets/file
+```
+
+_Added in Synapse 1.126.0._
+
 ---
 ### `start_pushers`

--- a/docs/workers.md
+++ b/docs/workers.md
@ -255,7 +255,7 @@ information.
    ^/_matrix/client/(r0|v3|unstable)/keys/changes$
    ^/_matrix/client/(r0|v3|unstable)/keys/claim$
    ^/_matrix/client/(r0|v3|unstable)/room_keys/
-    ^/_matrix/client/(r0|v3|unstable)/keys/upload/
+    ^/_matrix/client/(r0|v3|unstable)/keys/upload$

    # Registration/login requests
    ^/_matrix/client/(api/v1|r0|v3|unstable)/login$
--- a/poetry.lock
+++ b/poetry.lock
@ -32,13 +32,13 @@ tests-mypy = ["mypy (>=1.11.1)", "pytest-mypy-plugins"]

 [[package]]
 name = "authlib"
-version = "1.4.0"
+version = "1.4.1"
 description = "The ultimate Python library in building OAuth and OpenID Connect servers and clients."
 optional = true
 python-versions = ">=3.9"
 files = [
-    {file = "Authlib-1.4.0-py2.py3-none-any.whl", hash = "sha256:4bb20b978c8b636222b549317c1815e1fe62234fc1c5efe8855d84aebf3a74e3"},
-    {file = "authlib-1.4.0.tar.gz", hash = "sha256:1c1e6608b5ed3624aeeee136ca7f8c120d6f51f731aa152b153d54741840e1f2"},
+    {file = "Authlib-1.4.1-py2.py3-none-any.whl", hash = "sha256:edc29c3f6a3e72cd9e9f45fff67fc663a2c364022eb0371c003f22d5405915c1"},
+    {file = "authlib-1.4.1.tar.gz", hash = "sha256:30ead9ea4993cdbab821dc6e01e818362f92da290c04c7f6a1940f86507a790d"},
 ]

 [package.dependencies]
@ -64,36 +64,62 @@ visualize = ["Twisted (>=16.1.1)", "graphviz (>0.5.1)"]

 [[package]]
 name = "bcrypt"
-version = "4.2.1"
+version = "4.3.0"
 description = "Modern password hashing for your software and your servers"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.8"
 files = [
-    {file = "bcrypt-4.2.1-cp37-abi3-macosx_10_12_universal2.whl", hash = "sha256:1340411a0894b7d3ef562fb233e4b6ed58add185228650942bdc885362f32c17"},
-    {file = "bcrypt-4.2.1-cp37-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:b1ee315739bc8387aa36ff127afc99120ee452924e0df517a8f3e4c0187a0f5f"},
-    {file = "bcrypt-4.2.1-cp37-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:8dbd0747208912b1e4ce730c6725cb56c07ac734b3629b60d4398f082ea718ad"},
-    {file = "bcrypt-4.2.1-cp37-abi3-manylinux_2_28_aarch64.whl", hash = "sha256:aaa2e285be097050dba798d537b6efd9b698aa88eef52ec98d23dcd6d7cf6fea"},
-    {file = "bcrypt-4.2.1-cp37-abi3-manylinux_2_28_x86_64.whl", hash = "sha256:76d3e352b32f4eeb34703370e370997065d28a561e4a18afe4fef07249cb4396"},
-    {file = "bcrypt-4.2.1-cp37-abi3-musllinux_1_1_aarch64.whl", hash = "sha256:b7703ede632dc945ed1172d6f24e9f30f27b1b1a067f32f68bf169c5f08d0425"},
-    {file = "bcrypt-4.2.1-cp37-abi3-musllinux_1_1_x86_64.whl", hash = "sha256:89df2aea2c43be1e1fa066df5f86c8ce822ab70a30e4c210968669565c0f4685"},
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-    {file = "bcrypt-4.2.1-cp37-abi3-win32.whl", hash = "sha256:adadd36274510a01f33e6dc08f5824b97c9580583bd4487c564fc4617b328005"},
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-    {file = "bcrypt-4.2.1-cp39-abi3-musllinux_1_1_aarch64.whl", hash = "sha256:041fa0155c9004eb98a232d54da05c0b41d4b8e66b6fc3cb71b4b3f6144ba837"},
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+    {file = "bcrypt-4.3.0-cp313-cp313t-macosx_10_12_universal2.whl", hash = "sha256:f01e060f14b6b57bbb72fc5b4a83ac21c443c9a2ee708e04a10e9192f90a6281"},
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+    {file = "bcrypt-4.3.0-cp313-cp313t-manylinux_2_28_armv7l.manylinux_2_31_armv7l.whl", hash = "sha256:74a8d21a09f5e025a9a23e7c0fd2c7fe8e7503e4d356c0a2c1486ba010619f09"},
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+    {file = "markupsafe-3.0.2.tar.gz", hash = "sha256:ee55d3edf80167e48ea11a923c7386f4669df67d7994554387f84e7d8b0a2bf0"},
 ]

 [[package]]
@ -2337,13 +2374,13 @@ doc = ["Sphinx", "sphinx-rtd-theme"]

 [[package]]
 name = "sentry-sdk"
-version = "2.19.2"
+version = "2.22.0"
 description = "Python client for Sentry (https://sentry.io)"
 optional = true
 python-versions = ">=3.6"
 files = [
-    {file = "sentry_sdk-2.19.2-py2.py3-none-any.whl", hash = "sha256:ebdc08228b4d131128e568d696c210d846e5b9d70aa0327dec6b1272d9d40b84"},
-    {file = "sentry_sdk-2.19.2.tar.gz", hash = "sha256:467df6e126ba242d39952375dd816fbee0f217d119bf454a8ce74cf1e7909e8d"},
+    {file = "sentry_sdk-2.22.0-py2.py3-none-any.whl", hash = "sha256:3d791d631a6c97aad4da7074081a57073126c69487560c6f8bffcf586461de66"},
+    {file = "sentry_sdk-2.22.0.tar.gz", hash = "sha256:b4bf43bb38f547c84b2eadcefbe389b36ef75f3f38253d7a74d6b928c07ae944"},
 ]

 [package.dependencies]
@ -2387,7 +2424,9 @@ sanic = ["sanic (>=0.8)"]
 sqlalchemy = ["sqlalchemy (>=1.2)"]
 starlette = ["starlette (>=0.19.1)"]
 starlite = ["starlite (>=1.48)"]
+statsig = ["statsig (>=0.55.3)"]
 tornado = ["tornado (>=6)"]
+unleash = ["UnleashClient (>=6.0.1)"]

 [[package]]
 name = "service-identity"
@ -2821,13 +2860,13 @@ files = [

 [[package]]
 name = "types-psycopg2"
-version = "2.9.21.20241019"
+version = "2.9.21.20250121"
 description = "Typing stubs for psycopg2"
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.9"
 files = [
-    {file = "types-psycopg2-2.9.21.20241019.tar.gz", hash = "sha256:bca89b988d2ebd19bcd08b177d22a877ea8b841decb10ed130afcf39404612fa"},
-    {file = "types_psycopg2-2.9.21.20241019-py3-none-any.whl", hash = "sha256:44d091e67732d16a941baae48cd7b53bf91911bc36888652447cf1ef0c1fb3f6"},
+    {file = "types_psycopg2-2.9.21.20250121-py3-none-any.whl", hash = "sha256:b890dc6f5a08b6433f0ff73a4ec9a834deedad3e914f2a4a6fd43df021f745f1"},
+    {file = "types_psycopg2-2.9.21.20250121.tar.gz", hash = "sha256:2b0e2cd0f3747af1ae25a7027898716d80209604770ef3cbf350fe055b9c349b"},
 ]

 [[package]]
--- a/pyproject.toml
+++ b/pyproject.toml
@ -97,7 +97,7 @@ module-name = "synapse.synapse_rust"

 [tool.poetry]
 name = "matrix-synapse"
-version = "1.125.0"
+version = "1.126.0"
 description = "Homeserver for the Matrix decentralised comms protocol"
 authors = ["Matrix.org Team and Contributors <packages@matrix.org>"]
 license = "AGPL-3.0-or-later"
@ -390,7 +390,7 @@ skip = "cp36* cp37* cp38* pp37* pp38* *-musllinux_i686 pp*aarch64 *-musllinux_aa
 #
 # We temporarily pin Rust to 1.82.0 to work around
 # https://github.com/element-hq/synapse/issues/17988
-before-all =  "curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.82.0 -y --profile minimal"
+before-all =  "sh .ci/before_build_wheel.sh"
 environment= { PATH = "$PATH:$HOME/.cargo/bin" }

 # For some reason if we don't manually clean the build directory we
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@ -30,7 +30,7 @@ http = "1.1.0"
 lazy_static = "1.4.0"
 log = "0.4.17"
 mime = "0.3.17"
-pyo3 = { version = "0.23.2", features = [
+pyo3 = { version = "0.23.5", features = [
    "macros",
    "anyhow",
    "abi3",
--- a/rust/src/rendezvous/mod.rs
+++ b/rust/src/rendezvous/mod.rs
@ -47,7 +47,7 @@ fn prepare_headers(headers: &mut HeaderMap, session: &Session) {
    headers.typed_insert(AccessControlAllowOrigin::ANY);
    headers.typed_insert(AccessControlExposeHeaders::from_iter([ETAG]));
    headers.typed_insert(Pragma::no_cache());
-    headers.typed_insert(CacheControl::new().with_no_store());
+    headers.typed_insert(CacheControl::new().with_no_store().with_no_transform());
    headers.typed_insert(session.etag());
    headers.typed_insert(session.expires());
    headers.typed_insert(session.last_modified());
@ -192,10 +192,12 @@ impl RendezvousHandler {
            "url": uri,
        })
        .to_string();
+        let length = response.len() as _;

        let mut response = Response::new(response.as_bytes());
        *response.status_mut() = StatusCode::CREATED;
        response.headers_mut().typed_insert(ContentType::json());
+        response.headers_mut().typed_insert(ContentLength(length));
        prepare_headers(response.headers_mut(), &session);
        http_response_to_twisted(twisted_request, response)?;

@ -299,6 +301,7 @@ impl RendezvousHandler {
        // proxy/cache setup which strips the ETag header if there is no Content-Type set.
        // Specifically, we noticed this behaviour when placing Synapse behind Cloudflare.
        response.headers_mut().typed_insert(ContentType::text());
+        response.headers_mut().typed_insert(ContentLength(0));

        http_response_to_twisted(twisted_request, response)?;

@ -316,6 +319,7 @@ impl RendezvousHandler {
        response
            .headers_mut()
            .typed_insert(AccessControlAllowOrigin::ANY);
+        response.headers_mut().typed_insert(ContentLength(0));
        http_response_to_twisted(twisted_request, response)?;

        Ok(())
--- a/scripts-dev/release.py
+++ b/scripts-dev/release.py
@ -592,7 +592,7 @@ def _wait_for_actions(gh_token: Optional[str]) -> None:
        if all(
            workflow["status"] != "in_progress" for workflow in resp["workflow_runs"]
        ):
-            success = (
+            success = all(
                workflow["status"] == "completed" for workflow in resp["workflow_runs"]
            )
            if success:
--- a/synapse/api/auth/msc3861_delegated.py
+++ b/synapse/api/auth/msc3861_delegated.py
@ -214,6 +214,9 @@ class MSC3861DelegatedAuth(BaseAuth):
            "Content-Type": "application/x-www-form-urlencoded",
            "User-Agent": str(self._http_client.user_agent, "utf-8"),
            "Accept": "application/json",
+            # Tell MAS that we support reading the device ID as an explicit
+            # value, not encoded in the scope. This is supported by MAS 0.15+
+            "X-MAS-Supports-Device-Id": "1",
        }

        args = {"token": token, "token_type_hint": "access_token"}
@ -409,29 +412,41 @@ class MSC3861DelegatedAuth(BaseAuth):
        else:
            user_id = UserID.from_string(user_id_str)

-        # Find device_ids in scope
-        # We only allow a single device_id in the scope, so we find them all in the
-        # scope list, and raise if there are more than one. The OIDC server should be
-        # the one enforcing valid scopes, so we raise a 500 if we find an invalid scope.
-        device_ids = [
-            tok[len(SCOPE_MATRIX_DEVICE_PREFIX) :]
-            for tok in scope
-            if tok.startswith(SCOPE_MATRIX_DEVICE_PREFIX)
-        ]
+        # MAS 0.15+ will give us the device ID as an explicit value for compatibility sessions
+        # If present, we get it from here, if not we get it in thee scope
+        device_id = introspection_result.get("device_id")
+        if device_id is not None:
+            # We got the device ID explicitly, just sanity check that it's a string
+            if not isinstance(device_id, str):
+                raise AuthError(
+                    500,
+                    "Invalid device ID in introspection result",
+                )
+        else:
+            # Find device_ids in scope
+            # We only allow a single device_id in the scope, so we find them all in the
+            # scope list, and raise if there are more than one. The OIDC server should be
+            # the one enforcing valid scopes, so we raise a 500 if we find an invalid scope.
+            device_ids = [
+                tok[len(SCOPE_MATRIX_DEVICE_PREFIX) :]
+                for tok in scope
+                if tok.startswith(SCOPE_MATRIX_DEVICE_PREFIX)
+            ]

-        if len(device_ids) > 1:
-            raise AuthError(
-                500,
-                "Multiple device IDs in scope",
-            )
+            if len(device_ids) > 1:
+                raise AuthError(
+                    500,
+                    "Multiple device IDs in scope",
+                )
+
+            device_id = device_ids[0] if device_ids else None

-        device_id = device_ids[0] if device_ids else None
        if device_id is not None:
            # Sanity check the device_id
            if len(device_id) > 255 or len(device_id) < 1:
                raise AuthError(
                    500,
-                    "Invalid device ID in scope",
+                    "Invalid device ID in introspection result",
                )

            # Create the device on the fly if it does not exist
--- a/synapse/config/_base.py
+++ b/synapse/config/_base.py
@ -589,6 +589,14 @@ class RootConfig:
            " Defaults to the directory containing the last config file",
        )

+        config_parser.add_argument(
+            "--no-secrets-in-config",
+            dest="secrets_in_config",
+            action="store_false",
+            default=True,
+            help="Reject config options that expect an in-line secret as value.",
+        )
+
        cls.invoke_all_static("add_arguments", config_parser)

    @classmethod
@ -626,7 +634,10 @@ class RootConfig:

        config_dict = read_config_files(config_files)
        obj.parse_config_dict(
-            config_dict, config_dir_path=config_dir_path, data_dir_path=data_dir_path
+            config_dict,
+            config_dir_path=config_dir_path,
+            data_dir_path=data_dir_path,
+            allow_secrets_in_config=config_args.secrets_in_config,
        )

        obj.invoke_all("read_arguments", config_args)
@ -653,6 +664,13 @@ class RootConfig:
            help="Specify config file. Can be given multiple times and"
            " may specify directories containing *.yaml files.",
        )
+        parser.add_argument(
+            "--no-secrets-in-config",
+            dest="secrets_in_config",
+            action="store_false",
+            default=True,
+            help="Reject config options that expect an in-line secret as value.",
+        )

        # we nest the mutually-exclusive group inside another group so that the help
        # text shows them in their own group.
@ -821,14 +839,21 @@ class RootConfig:
            return None

        obj.parse_config_dict(
-            config_dict, config_dir_path=config_dir_path, data_dir_path=data_dir_path
+            config_dict,
+            config_dir_path=config_dir_path,
+            data_dir_path=data_dir_path,
+            allow_secrets_in_config=config_args.secrets_in_config,
        )
        obj.invoke_all("read_arguments", config_args)

        return obj

    def parse_config_dict(
-        self, config_dict: Dict[str, Any], config_dir_path: str, data_dir_path: str
+        self,
+        config_dict: Dict[str, Any],
+        config_dir_path: str,
+        data_dir_path: str,
+        allow_secrets_in_config: bool = True,
    ) -> None:
        """Read the information from the config dict into this Config object.

@ -846,6 +871,7 @@ class RootConfig:
            config_dict,
            config_dir_path=config_dir_path,
            data_dir_path=data_dir_path,
+            allow_secrets_in_config=allow_secrets_in_config,
        )

    def generate_missing_files(
--- a/synapse/config/_base.pyi
+++ b/synapse/config/_base.pyi
@ -132,7 +132,11 @@ class RootConfig:
    @classmethod
    def invoke_all_static(cls, func_name: str, *args: Any, **kwargs: Any) -> None: ...
    def parse_config_dict(
-        self, config_dict: Dict[str, Any], config_dir_path: str, data_dir_path: str
+        self,
+        config_dict: Dict[str, Any],
+        config_dir_path: str,
+        data_dir_path: str,
+        allow_secrets_in_config: bool = ...,
    ) -> None: ...
    def generate_config(
        self,
--- a/synapse/config/captcha.py
+++ b/synapse/config/captcha.py
@ -29,8 +29,15 @@ from ._base import Config, ConfigError
 class CaptchaConfig(Config):
    section = "captcha"

-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
        recaptcha_private_key = config.get("recaptcha_private_key")
+        if recaptcha_private_key and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("recaptcha_private_key",),
+            )
        if recaptcha_private_key is not None and not isinstance(
            recaptcha_private_key, str
        ):
@ -38,6 +45,11 @@ class CaptchaConfig(Config):
        self.recaptcha_private_key = recaptcha_private_key

        recaptcha_public_key = config.get("recaptcha_public_key")
+        if recaptcha_public_key and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("recaptcha_public_key",),
+            )
        if recaptcha_public_key is not None and not isinstance(
            recaptcha_public_key, str
        ):
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@ -250,7 +250,9 @@ class MSC3861:
            )
        return self._admin_token

-    def check_config_conflicts(self, root: RootConfig) -> None:
+    def check_config_conflicts(
+        self, root: RootConfig, allow_secrets_in_config: bool
+    ) -> None:
        """Checks for any configuration conflicts with other parts of Synapse.

        Raises:
@ -260,6 +262,24 @@ class MSC3861:
        if not self.enabled:
            return

+        if self._client_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("experimental", "msc3861", "client_secret"),
+            )
+
+        if self.jwk and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("experimental", "msc3861", "jwk"),
+            )
+
+        if self._admin_token and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("experimental", "msc3861", "admin_token"),
+            )
+
        if (
            root.auth.password_enabled_for_reauth
            or root.auth.password_enabled_for_login
@ -350,7 +370,9 @@ class ExperimentalConfig(Config):

    section = "experimental"

-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
        experimental = config.get("experimental_features") or {}

        # MSC3026 (busy presence state)
@ -494,7 +516,9 @@ class ExperimentalConfig(Config):
            ) from exc

        # Check that none of the other config options conflict with MSC3861 when enabled
-        self.msc3861.check_config_conflicts(self.root)
+        self.msc3861.check_config_conflicts(
+            self.root, allow_secrets_in_config=allow_secrets_in_config
+        )

        self.msc4028_push_encrypted_events = experimental.get(
            "msc4028_push_encrypted_events", False
--- a/synapse/config/key.py
+++ b/synapse/config/key.py
@ -96,6 +96,11 @@ Conflicting options 'macaroon_secret_key' and 'macaroon_secret_key_path' are
 both defined in config file.
 """

+CONFLICTING_FORM_SECRET_OPTS_ERROR = """\
+Conflicting options 'form_secret' and 'form_secret_path' are both defined in
+config file.
+"""
+
 logger = logging.getLogger(__name__)


@ -112,7 +117,11 @@ class KeyConfig(Config):
    section = "key"

    def read_config(
-        self, config: JsonDict, config_dir_path: str, **kwargs: Any
+        self,
+        config: JsonDict,
+        config_dir_path: str,
+        allow_secrets_in_config: bool,
+        **kwargs: Any,
    ) -> None:
        # the signing key can be specified inline or in a separate file
        if "signing_key" in config:
@ -172,6 +181,11 @@ class KeyConfig(Config):
        )

        macaroon_secret_key = config.get("macaroon_secret_key")
+        if macaroon_secret_key and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("macaroon_secret_key",),
+            )
        macaroon_secret_key_path = config.get("macaroon_secret_key_path")
        if macaroon_secret_key_path:
            if macaroon_secret_key:
@ -192,7 +206,19 @@ class KeyConfig(Config):

        # a secret which is used to calculate HMACs for form values, to stop
        # falsification of values
-        self.form_secret = config.get("form_secret", None)
+        form_secret = config.get("form_secret", None)
+        if form_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("form_secret",),
+            )
+        form_secret_path = config.get("form_secret_path", None)
+        if form_secret_path:
+            if form_secret:
+                raise ConfigError(CONFLICTING_FORM_SECRET_OPTS_ERROR)
+            self.form_secret = read_file(form_secret_path, "form_secret_path").strip()
+        else:
+            self.form_secret = form_secret

    def generate_config_section(
        self,
--- a/synapse/config/oidc.py
+++ b/synapse/config/oidc.py
@ -125,6 +125,10 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
            "enum": ["client_secret_basic", "client_secret_post", "none"],
        },
        "pkce_method": {"type": "string", "enum": ["auto", "always", "never"]},
+        "id_token_signing_alg_values_supported": {
+            "type": "array",
+            "items": {"type": "string"},
+        },
        "scopes": {"type": "array", "items": {"type": "string"}},
        "authorization_endpoint": {"type": "string"},
        "token_endpoint": {"type": "string"},
@ -137,6 +141,9 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
            "type": "string",
            "enum": ["auto", "userinfo_endpoint"],
        },
+        "redirect_uri": {
+            "type": ["string", "null"],
+        },
        "allow_existing_users": {"type": "boolean"},
        "user_mapping_provider": {"type": ["object", "null"]},
        "attribute_requirements": {
@ -326,6 +333,9 @@ def _parse_oidc_config_dict(
        client_secret_jwt_key=client_secret_jwt_key,
        client_auth_method=client_auth_method,
        pkce_method=oidc_config.get("pkce_method", "auto"),
+        id_token_signing_alg_values_supported=oidc_config.get(
+            "id_token_signing_alg_values_supported"
+        ),
        scopes=oidc_config.get("scopes", ["openid"]),
        authorization_endpoint=oidc_config.get("authorization_endpoint"),
        token_endpoint=oidc_config.get("token_endpoint"),
@ -337,6 +347,7 @@ def _parse_oidc_config_dict(
        ),
        skip_verification=oidc_config.get("skip_verification", False),
        user_profile_method=oidc_config.get("user_profile_method", "auto"),
+        redirect_uri=oidc_config.get("redirect_uri"),
        allow_existing_users=oidc_config.get("allow_existing_users", False),
        user_mapping_provider_class=user_mapping_provider_class,
        user_mapping_provider_config=user_mapping_provider_config,
@ -402,6 +413,34 @@ class OidcProviderConfig:
    # Valid values are 'auto', 'always', and 'never'.
    pkce_method: str

+    id_token_signing_alg_values_supported: Optional[List[str]]
+    """
+    List of the JWS signing algorithms (`alg` values) that are supported for signing the
+    `id_token`.
+
+    This is *not* required if `discovery` is disabled. We default to supporting `RS256`
+    in the downstream usage if no algorithms are configured here or in the discovery
+    document.
+
+    According to the spec, the algorithm `"RS256"` MUST be included. The absolute rigid
+    approach would be to reject this provider as non-compliant if it's not included but
+    we can just allow whatever and see what happens (they're the ones that configured
+    the value and cooperating with the identity provider). It wouldn't be wise to add it
+    ourselves because absence of `RS256` might indicate that the provider actually
+    doesn't support it, despite the spec requirement. Adding it silently could lead to
+    failed authentication attempts or strange mismatch attacks.
+
+    The `alg` value `"none"` MAY be supported but can only be used if the Authorization
+    Endpoint does not include `id_token` in the `response_type` (ex.
+    `/authorize?response_type=code` where `none` can apply,
+    `/authorize?response_type=code%20id_token` where `none` can't apply) (such as when
+    using the Authorization Code Flow).
+
+    Spec:
+     - https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderMetadata
+     - https://openid.net/specs/openid-connect-core-1_0.html#AuthorizationExamples
+    """
+
    # list of scopes to request
    scopes: Collection[str]

@ -432,6 +471,18 @@ class OidcProviderConfig:
    # values are: "auto" or "userinfo_endpoint".
    user_profile_method: str

+    redirect_uri: Optional[str]
+    """
+    An optional replacement for Synapse's hardcoded `redirect_uri` URL
+    (`<public_baseurl>/_synapse/client/oidc/callback`). This can be used to send
+    the client to a different URL after it receives a response from the
+    `authorization_endpoint`.
+
+    If this is set, the client is expected to call Synapse's OIDC callback URL
+    reproduced above itself with the necessary parameters and session cookie, in
+    order to complete OIDC login.
+    """
+
    # whether to allow a user logging in via OIDC to match a pre-existing account
    # instead of failing
    allow_existing_users: bool
--- a/synapse/config/ratelimiting.py
+++ b/synapse/config/ratelimiting.py
@ -234,3 +234,9 @@ class RatelimitConfig(Config):
            "rc_presence.per_user",
            defaults={"per_second": 0.1, "burst_count": 1},
        )
+
+        self.rc_delayed_event_mgmt = RatelimitSettings.parse(
+            config,
+            "rc_delayed_event_mgmt",
+            defaults={"per_second": 1, "burst_count": 5},
+        )
--- a/synapse/config/redis.py
+++ b/synapse/config/redis.py
@ -34,7 +34,9 @@ These are mutually incompatible.
 class RedisConfig(Config):
    section = "redis"

-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
        redis_config = config.get("redis") or {}
        self.redis_enabled = redis_config.get("enabled", False)

@ -48,6 +50,11 @@ class RedisConfig(Config):
        self.redis_path = redis_config.get("path", None)
        self.redis_dbid = redis_config.get("dbid", None)
        self.redis_password = redis_config.get("password")
+        if self.redis_password and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("redis", "password"),
+            )
        redis_password_path = redis_config.get("password_path")
        if redis_password_path:
            if self.redis_password:
--- a/synapse/config/registration.py
+++ b/synapse/config/registration.py
@ -43,7 +43,9 @@ You have configured both `registration_shared_secret` and
 class RegistrationConfig(Config):
    section = "registration"

-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
        self.enable_registration = strtobool(
            str(config.get("enable_registration", False))
        )
@ -68,6 +70,11 @@ class RegistrationConfig(Config):

        # read the shared secret, either inline or from an external file
        self.registration_shared_secret = config.get("registration_shared_secret")
+        if self.registration_shared_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("registration_shared_secret",),
+            )
        registration_shared_secret_path = config.get("registration_shared_secret_path")
        if registration_shared_secret_path:
            if self.registration_shared_secret:
--- a/synapse/config/room_directory.py
+++ b/synapse/config/room_directory.py
@ -54,9 +54,7 @@ class RoomDirectoryConfig(Config):
                for rule in room_list_publication_rules
            ]
        else:
-            self._room_list_publication_rules = [
-                _RoomDirectoryRule("room_list_publication_rules", {"action": "allow"})
-            ]
+            self._room_list_publication_rules = []

    def is_alias_creation_allowed(self, user_id: str, room_id: str, alias: str) -> bool:
        """Checks if the given user is allowed to create the given alias
--- a/synapse/config/voip.py
+++ b/synapse/config/voip.py
@ -34,9 +34,16 @@ These are mutually incompatible.
 class VoipConfig(Config):
    section = "voip"

-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
        self.turn_uris = config.get("turn_uris", [])
        self.turn_shared_secret = config.get("turn_shared_secret")
+        if self.turn_shared_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("turn_shared_secret",),
+            )
        turn_shared_secret_path = config.get("turn_shared_secret_path")
        if turn_shared_secret_path:
            if self.turn_shared_secret:
--- a/synapse/config/workers.py
+++ b/synapse/config/workers.py
@ -38,6 +38,7 @@ from synapse.config._base import (
    ConfigError,
    RoutableShardedWorkerHandlingConfig,
    ShardedWorkerHandlingConfig,
+    read_file,
 )
 from synapse.config._util import parse_and_validate_mapping
 from synapse.config.server import (
@ -65,6 +66,11 @@ configuration under `main` inside the `instance_map`. See workers documentation
 `https://element-hq.github.io/synapse/latest/workers.html#worker-configuration`
 """

+CONFLICTING_WORKER_REPLICATION_SECRET_OPTS_ERROR = """\
+Conflicting options 'worker_replication_secret' and
+'worker_replication_secret_path' are both defined in config file.
+"""
+
 # This allows for a handy knob when it's time to change from 'master' to
 # something with less 'history'
 MAIN_PROCESS_INSTANCE_NAME = "master"
@ -218,7 +224,9 @@ class WorkerConfig(Config):

    section = "worker"

-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
        self.worker_app = config.get("worker_app")

        # Canonicalise worker_app so that master always has None
@ -242,7 +250,23 @@ class WorkerConfig(Config):
            raise ConfigError(DIRECT_TCP_ERROR, ("worker_replication_port",))

        # The shared secret used for authentication when connecting to the main synapse.
-        self.worker_replication_secret = config.get("worker_replication_secret", None)
+        worker_replication_secret = config.get("worker_replication_secret", None)
+        if worker_replication_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("worker_replication_secret",),
+            )
+        worker_replication_secret_path = config.get(
+            "worker_replication_secret_path", None
+        )
+        if worker_replication_secret_path:
+            if worker_replication_secret:
+                raise ConfigError(CONFLICTING_WORKER_REPLICATION_SECRET_OPTS_ERROR)
+            self.worker_replication_secret = read_file(
+                worker_replication_secret_path, "worker_replication_secret_path"
+            ).strip()
+        else:
+            self.worker_replication_secret = worker_replication_secret

        self.worker_name = config.get("worker_name", self.worker_app)
        self.instance_name = self.worker_name or MAIN_PROCESS_INSTANCE_NAME
--- a/synapse/handlers/delayed_events.py
+++ b/synapse/handlers/delayed_events.py
@ -19,6 +19,7 @@ from twisted.internet.interfaces import IDelayedCall

 from synapse.api.constants import EventTypes
 from synapse.api.errors import ShadowBanError
+from synapse.api.ratelimiting import Ratelimiter
 from synapse.config.workers import MAIN_PROCESS_INSTANCE_NAME
 from synapse.logging.opentracing import set_tag
 from synapse.metrics import event_processing_positions
@ -57,10 +58,19 @@ class DelayedEventsHandler:
        self._storage_controllers = hs.get_storage_controllers()
        self._config = hs.config
        self._clock = hs.get_clock()
-        self._request_ratelimiter = hs.get_request_ratelimiter()
        self._event_creation_handler = hs.get_event_creation_handler()
        self._room_member_handler = hs.get_room_member_handler()

+        self._request_ratelimiter = hs.get_request_ratelimiter()
+
+        # Ratelimiter for management of existing delayed events,
+        # keyed by the sending user ID & device ID.
+        self._delayed_event_mgmt_ratelimiter = Ratelimiter(
+            store=self._store,
+            clock=self._clock,
+            cfg=self._config.ratelimiting.rc_delayed_event_mgmt,
+        )
+
        self._next_delayed_event_call: Optional[IDelayedCall] = None

        # The current position in the current_state_delta stream
@ -227,6 +237,9 @@ class DelayedEventsHandler:
        Raises:
            SynapseError: if the delayed event fails validation checks.
        """
+        # Use standard request limiter for scheduling new delayed events.
+        # TODO: Instead apply ratelimiting based on the scheduled send time.
+        # See https://github.com/element-hq/synapse/issues/18021
        await self._request_ratelimiter.ratelimit(requester)

        self._event_creation_handler.validator.validate_builder(
@ -285,7 +298,10 @@ class DelayedEventsHandler:
            NotFoundError: if no matching delayed event could be found.
        """
        assert self._is_master
-        await self._request_ratelimiter.ratelimit(requester)
+        await self._delayed_event_mgmt_ratelimiter.ratelimit(
+            requester,
+            (requester.user.to_string(), requester.device_id),
+        )
        await self._initialized_from_db

        next_send_ts = await self._store.cancel_delayed_event(
@ -308,7 +324,10 @@ class DelayedEventsHandler:
            NotFoundError: if no matching delayed event could be found.
        """
        assert self._is_master
-        await self._request_ratelimiter.ratelimit(requester)
+        await self._delayed_event_mgmt_ratelimiter.ratelimit(
+            requester,
+            (requester.user.to_string(), requester.device_id),
+        )
        await self._initialized_from_db

        next_send_ts = await self._store.restart_delayed_event(
@ -332,6 +351,8 @@ class DelayedEventsHandler:
            NotFoundError: if no matching delayed event could be found.
        """
        assert self._is_master
+        # Use standard request limiter for sending delayed events on-demand,
+        # as an on-demand send is similar to sending a regular event.
        await self._request_ratelimiter.ratelimit(requester)
        await self._initialized_from_db

@ -415,7 +436,10 @@ class DelayedEventsHandler:

    async def get_all_for_user(self, requester: Requester) -> List[JsonDict]:
        """Return all pending delayed events requested by the given user."""
-        await self._request_ratelimiter.ratelimit(requester)
+        await self._delayed_event_mgmt_ratelimiter.ratelimit(
+            requester,
+            (requester.user.to_string(), requester.device_id),
+        )
        return await self._store.get_all_delayed_events_for_user(
            requester.user.localpart
        )
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@ -644,11 +644,33 @@ class EventCreationHandler:
        """
        await self.auth_blocking.check_auth_blocking(requester=requester)

-        if event_dict["type"] == EventTypes.Message:
-            requester_suspended = await self.store.get_user_suspended_status(
-                requester.user.to_string()
-            )
-            if requester_suspended:
+        requester_suspended = await self.store.get_user_suspended_status(
+            requester.user.to_string()
+        )
+        if requester_suspended:
+            # We want to allow suspended users to perform "corrective" actions
+            # asked of them by server admins, such as redact their messages and
+            # leave rooms.
+            if event_dict["type"] in ["m.room.redaction", "m.room.member"]:
+                if event_dict["type"] == "m.room.redaction":
+                    event = await self.store.get_event(
+                        event_dict["content"]["redacts"], allow_none=True
+                    )
+                    if event:
+                        if event.sender != requester.user.to_string():
+                            raise SynapseError(
+                                403,
+                                "You can only redact your own events while account is suspended.",
+                                Codes.USER_ACCOUNT_SUSPENDED,
+                            )
+                if event_dict["type"] == "m.room.member":
+                    if event_dict["content"]["membership"] != "leave":
+                        raise SynapseError(
+                            403,
+                            "Changing membership while account is suspended is not allowed.",
+                            Codes.USER_ACCOUNT_SUSPENDED,
+                        )
+            else:
                raise SynapseError(
                    403,
                    "Sending messages while account is suspended is not allowed.",
--- a/synapse/handlers/oidc.py
+++ b/synapse/handlers/oidc.py
@ -382,7 +382,12 @@ class OidcProvider:
        self._macaroon_generaton = macaroon_generator

        self._config = provider
-        self._callback_url: str = hs.config.oidc.oidc_callback_url
+
+        self._callback_url: str
+        if provider.redirect_uri is not None:
+            self._callback_url = provider.redirect_uri
+        else:
+            self._callback_url = hs.config.oidc.oidc_callback_url

        # Calculate the prefix for OIDC callback paths based on the public_baseurl.
        # We'll insert this into the Path= parameter of any session cookies we set.
@ -640,6 +645,11 @@ class OidcProvider:
        elif self._config.pkce_method == "never":
            metadata.pop("code_challenge_methods_supported", None)

+        if self._config.id_token_signing_alg_values_supported:
+            metadata["id_token_signing_alg_values_supported"] = (
+                self._config.id_token_signing_alg_values_supported
+            )
+
        self._validate_metadata(metadata)

        return metadata
--- a/synapse/media/_base.py
+++ b/synapse/media/_base.py
@ -118,6 +118,9 @@ DEFAULT_MAX_TIMEOUT_MS = 20_000
 # Maximum allowed timeout_ms for download and thumbnail requests
 MAXIMUM_ALLOWED_MAX_TIMEOUT_MS = 60_000

+# The ETag header value to use for immutable media. This can be anything.
+_IMMUTABLE_ETAG = "1"
+

 def respond_404(request: SynapseRequest) -> None:
    assert request.path is not None
@ -224,12 +227,7 @@ def add_file_headers(

    request.setHeader(b"Content-Disposition", disposition.encode("ascii"))

-    # cache for at least a day.
-    # XXX: we might want to turn this off for data we don't want to
-    # recommend caching as it's sensitive or private - or at least
-    # select private. don't bother setting Expires as all our
-    # clients are smart enough to be happy with Cache-Control
-    request.setHeader(b"Cache-Control", b"public,max-age=86400,s-maxage=86400")
+    _add_cache_headers(request)

    if file_size is not None:
        request.setHeader(b"Content-Length", b"%d" % (file_size,))
@ -240,6 +238,26 @@ def add_file_headers(
    request.setHeader(b"X-Robots-Tag", "noindex, nofollow, noarchive, noimageindex")


+def _add_cache_headers(request: Request) -> None:
+    """Adds the appropriate cache headers to the response"""
+
+    # Cache on the client for at least a day.
+    #
+    # We set this to "public,s-maxage=0,proxy-revalidate" to allow CDNs to cache
+    # the media, so long as they "revalidate" the media on every request. By
+    # revalidate, we mean send the request to Synapse with a `If-None-Match`
+    # header, to which Synapse can either respond with a 304 if the user is
+    # authenticated/authorized, or a 401/403 if they're not.
+    request.setHeader(
+        b"Cache-Control", b"public,max-age=86400,s-maxage=0,proxy-revalidate"
+    )
+
+    # Set an ETag header to allow requesters to use it in requests to check if
+    # the cache is still valid. Since media is immutable (though may be
+    # deleted), we just set this to a constant.
+    request.setHeader(b"ETag", _IMMUTABLE_ETAG)
+
+
 # separators as defined in RFC2616. SP and HT are handled separately.
 # see _can_encode_filename_as_token.
 _FILENAME_SEPARATOR_CHARS = {
@ -336,13 +354,15 @@ async def respond_with_multipart_responder(

        from synapse.media.media_storage import MultipartFileConsumer

+        _add_cache_headers(request)
+
        # note that currently the json_object is just {}, this will change when linked media
        # is implemented
        multipart_consumer = MultipartFileConsumer(
            clock,
            request,
            media_type,
-            {},
+            {},  # Note: if we change this we need to change the returned ETag.
            disposition,
            media_length,
        )
@ -419,6 +439,46 @@ async def respond_with_responder(
    finish_request(request)


+def respond_with_304(request: SynapseRequest) -> None:
+    request.setResponseCode(304)
+
+    # could alternatively use request.notifyFinish() and flip a flag when
+    # the Deferred fires, but since the flag is RIGHT THERE it seems like
+    # a waste.
+    if request._disconnected:
+        logger.warning(
+            "Not sending response to request %s, already disconnected.", request
+        )
+        return None
+
+    _add_cache_headers(request)
+
+    request.finish()
+
+
+def check_for_cached_entry_and_respond(request: SynapseRequest) -> bool:
+    """Check if the request has a conditional header that allows us to return a
+    304 Not Modified response, and if it does, return a 304 response.
+
+    This handles clients and intermediary proxies caching media.
+    This method assumes that the user has already been
+    authorised to request the media.
+
+    Returns True if we have responded."""
+
+    # We've checked the user has access to the media, so we now check if it
+    # is a "conditional request" and we can just return a `304 Not Modified`
+    # response. Since media is immutable (though may be deleted), we just
+    # check this is the expected constant.
+    etag = request.getHeader("If-None-Match")
+    if etag == _IMMUTABLE_ETAG:
+        # Return a `304 Not modified`.
+        respond_with_304(request)
+        return True
+
+    return False
+
+
 class Responder(ABC):
    """Represents a response that can be streamed to the requester.

--- a/synapse/media/media_repository.py
+++ b/synapse/media/media_repository.py
@ -52,6 +52,7 @@ from synapse.media._base import (
    FileInfo,
    Responder,
    ThumbnailInfo,
+    check_for_cached_entry_and_respond,
    get_filename_from_headers,
    respond_404,
    respond_with_multipart_responder,
@ -459,6 +460,11 @@ class MediaRepository:

        self.mark_recently_accessed(None, media_id)

+        # Once we've checked auth we can return early if the media is cached on
+        # the client
+        if check_for_cached_entry_and_respond(request):
+            return
+
        media_type = media_info.media_type
        if not media_type:
            media_type = "application/octet-stream"
@ -538,6 +544,17 @@ class MediaRepository:
                allow_authenticated,
            )

+        # Check if the media is cached on the client, if so return 304. We need
+        # to do this after we have fetched remote media, as we need it to do the
+        # auth.
+        if check_for_cached_entry_and_respond(request):
+            # We always need to use the responder.
+            if responder:
+                with responder:
+                    pass
+
+            return
+
        # We deliberately stream the file outside the lock
        if responder and media_info:
            upload_name = name if name else media_info.upload_name
--- a/synapse/media/thumbnailer.py
+++ b/synapse/media/thumbnailer.py
@ -34,6 +34,7 @@ from synapse.logging.opentracing import trace
 from synapse.media._base import (
    FileInfo,
    ThumbnailInfo,
+    check_for_cached_entry_and_respond,
    respond_404,
    respond_with_file,
    respond_with_multipart_responder,
@ -294,6 +295,11 @@ class ThumbnailProvider:
            if media_info.authenticated:
                raise NotFoundError()

+        # Once we've checked auth we can return early if the media is cached on
+        # the client
+        if check_for_cached_entry_and_respond(request):
+            return
+
        thumbnail_infos = await self.store.get_local_media_thumbnails(media_id)
        await self._select_and_respond_with_thumbnail(
            request,
@ -334,6 +340,11 @@ class ThumbnailProvider:
            if media_info.authenticated:
                raise NotFoundError()

+        # Once we've checked auth we can return early if the media is cached on
+        # the client
+        if check_for_cached_entry_and_respond(request):
+            return
+
        thumbnail_infos = await self.store.get_local_media_thumbnails(media_id)
        for info in thumbnail_infos:
            t_w = info.width == desired_width
@ -431,6 +442,10 @@ class ThumbnailProvider:
                respond_404(request)
                return

+        # Check if the media is cached on the client, if so return 304.
+        if check_for_cached_entry_and_respond(request):
+            return
+
        thumbnail_infos = await self.store.get_remote_media_thumbnails(
            server_name, media_id
        )
@ -510,6 +525,10 @@ class ThumbnailProvider:
            if media_info.authenticated:
                raise NotFoundError()

+        # Check if the media is cached on the client, if so return 304.
+        if check_for_cached_entry_and_respond(request):
+            return
+
        thumbnail_infos = await self.store.get_remote_media_thumbnails(
            server_name, media_id
        )
--- a/synapse/rest/client/register.py
+++ b/synapse/rest/client/register.py
@ -908,6 +908,14 @@ class RegisterAppServiceOnlyRestServlet(RestServlet):

        await self.ratelimiter.ratelimit(None, client_addr, update=False)

+        # Allow only ASes to use this API.
+        if body.get("type") != APP_SERVICE_REGISTRATION_TYPE:
+            raise SynapseError(
+                403,
+                "Registration has been disabled. Only m.login.application_service registrations are allowed.",
+                errcode=Codes.FORBIDDEN,
+            )
+
        kind = parse_string(request, "kind", default="user")

        if kind == "guest":
@ -923,10 +931,6 @@ class RegisterAppServiceOnlyRestServlet(RestServlet):
        if not isinstance(desired_username, str) or len(desired_username) > 512:
            raise SynapseError(400, "Invalid username")

-        # Allow only ASes to use this API.
-        if body.get("type") != APP_SERVICE_REGISTRATION_TYPE:
-            raise SynapseError(403, "Non-application service registration type")
-
        if not self.auth.has_access_token(request):
            raise SynapseError(
                400,
--- a/synapse/storage/databases/state/store.py
+++ b/synapse/storage/databases/state/store.py
@ -828,10 +828,18 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
            "DELETE FROM state_groups_state WHERE state_group = ?",
            [(sg,) for sg in state_groups_to_delete],
        )
+        txn.execute_batch(
+            "DELETE FROM state_group_edges WHERE state_group = ?",
+            [(sg,) for sg in state_groups_to_delete],
+        )
        txn.execute_batch(
            "DELETE FROM state_groups WHERE id = ?",
            [(sg,) for sg in state_groups_to_delete],
        )
+        txn.execute_batch(
+            "DELETE FROM state_groups_pending_deletion WHERE state_group = ?",
+            [(sg,) for sg in state_groups_to_delete],
+        )

        return True

--- a/tests/config/test_load.py
+++ b/tests/config/test_load.py
@ -21,6 +21,7 @@
 #
 import tempfile
 from typing import Callable
+from unittest import mock

 import yaml
 from parameterized import parameterized
@ -31,6 +32,11 @@ from synapse.config.homeserver import HomeServerConfig

 from tests.config.utils import ConfigFileTestCase

+try:
+    import authlib
+except ImportError:
+    authlib = None
+
 try:
    import hiredis
 except ImportError:
@ -132,6 +138,8 @@ class ConfigLoadingFileTestCase(ConfigFileTestCase):
            "turn_shared_secret_path: /does/not/exist",
            "registration_shared_secret_path: /does/not/exist",
            "macaroon_secret_key_path: /does/not/exist",
+            "form_secret_path: /does/not/exist",
+            "worker_replication_secret_path: /does/not/exist",
            "experimental_features:\n  msc3861:\n    client_secret_path: /does/not/exist",
            "experimental_features:\n  msc3861:\n    admin_token_path: /does/not/exist",
            *["redis:\n  enabled: true\n  password_path: /does/not/exist"]
@ -159,6 +167,14 @@ class ConfigLoadingFileTestCase(ConfigFileTestCase):
                "macaroon_secret_key_path: {}",
                lambda c: c.key.macaroon_secret_key,
            ),
+            (
+                "form_secret_path: {}",
+                lambda c: c.key.form_secret.encode("utf-8"),
+            ),
+            (
+                "worker_replication_secret_path: {}",
+                lambda c: c.worker.worker_replication_secret.encode("utf-8"),
+            ),
            (
                "experimental_features:\n  msc3861:\n    client_secret_path: {}",
                lambda c: c.experimental.msc3861.client_secret().encode("utf-8"),
@ -180,7 +196,7 @@ class ConfigLoadingFileTestCase(ConfigFileTestCase):
        self, config_line: str, get_secret: Callable[[RootConfig], str]
    ) -> None:
        self.generate_config_and_remove_lines_containing(
-            ["registration_shared_secret", "macaroon_secret_key"]
+            ["form_secret", "macaroon_secret_key", "registration_shared_secret"]
        )
        with tempfile.NamedTemporaryFile(buffering=0) as secret_file:
            secret_file.write(b"53C237")
@ -189,3 +205,101 @@ class ConfigLoadingFileTestCase(ConfigFileTestCase):
            config = HomeServerConfig.load_config("", ["-c", self.config_file])

            self.assertEqual(get_secret(config), b"53C237")
+
+    @parameterized.expand(
+        [
+            "turn_shared_secret: 53C237",
+            "registration_shared_secret: 53C237",
+            "macaroon_secret_key: 53C237",
+            "recaptcha_private_key: 53C237",
+            "recaptcha_public_key: ¬53C237",
+            "form_secret: 53C237",
+            "worker_replication_secret: 53C237",
+            *[
+                "experimental_features:\n"
+                "  msc3861:\n"
+                "    enabled: true\n"
+                "    client_secret: 53C237"
+            ]
+            * (authlib is not None),
+            *[
+                "experimental_features:\n"
+                "  msc3861:\n"
+                "    enabled: true\n"
+                "    client_auth_method: private_key_jwt\n"
+                '    jwk: {{"mock": "mock"}}'
+            ]
+            * (authlib is not None),
+            *[
+                "experimental_features:\n"
+                "  msc3861:\n"
+                "    enabled: true\n"
+                "    admin_token: 53C237\n"
+                "    client_secret_path: {secret_file}"
+            ]
+            * (authlib is not None),
+            *["redis:\n  enabled: true\n  password: 53C237"] * (hiredis is not None),
+        ]
+    )
+    def test_no_secrets_in_config(self, config_line: str) -> None:
+        if authlib is not None:
+            patcher = mock.patch("authlib.jose.rfc7517.JsonWebKey.import_key")
+            self.addCleanup(patcher.stop)
+            patcher.start()
+
+        with tempfile.NamedTemporaryFile(buffering=0) as secret_file:
+            # Only used for less mocking with admin_token
+            secret_file.write(b"53C237")
+
+            self.generate_config_and_remove_lines_containing(
+                ["form_secret", "macaroon_secret_key", "registration_shared_secret"]
+            )
+            # Check strict mode with no offenders.
+            HomeServerConfig.load_config(
+                "", ["-c", self.config_file, "--no-secrets-in-config"]
+            )
+            self.add_lines_to_config(
+                ["", config_line.format(secret_file=secret_file.name)]
+            )
+            # Check strict mode with a single offender.
+            with self.assertRaises(ConfigError):
+                HomeServerConfig.load_config(
+                    "", ["-c", self.config_file, "--no-secrets-in-config"]
+                )
+
+            # Check lenient mode with a single offender.
+            HomeServerConfig.load_config("", ["-c", self.config_file])
+
+    def test_no_secrets_in_config_but_in_files(self) -> None:
+        with tempfile.NamedTemporaryFile(buffering=0) as secret_file:
+            secret_file.write(b"53C237")
+
+            self.generate_config_and_remove_lines_containing(
+                ["form_secret", "macaroon_secret_key", "registration_shared_secret"]
+            )
+            self.add_lines_to_config(
+                [
+                    "",
+                    f"turn_shared_secret_path: {secret_file.name}",
+                    f"registration_shared_secret_path: {secret_file.name}",
+                    f"macaroon_secret_key_path: {secret_file.name}",
+                    f"recaptcha_private_key_path: {secret_file.name}",
+                    f"recaptcha_public_key_path: {secret_file.name}",
+                    f"form_secret_path: {secret_file.name}",
+                    f"worker_replication_secret_path: {secret_file.name}",
+                    *[
+                        "experimental_features:\n"
+                        "  msc3861:\n"
+                        "    enabled: true\n"
+                        f"    admin_token_path: {secret_file.name}\n"
+                        f"    client_secret_path: {secret_file.name}\n"
+                        # f"    jwk_path: {secret_file.name}"
+                    ]
+                    * (authlib is not None),
+                    *[f"redis:\n  enabled: true\n  password_path: {secret_file.name}"]
+                    * (hiredis is not None),
+                ]
+            )
+            HomeServerConfig.load_config(
+                "", ["-c", self.config_file, "--no-secrets-in-config"]
+            )
--- a/tests/config/test_workers.py
+++ b/tests/config/test_workers.py
@ -47,7 +47,7 @@ class WorkerDutyConfigTestCase(TestCase):
            "worker_app": worker_app,
            **extras,
        }
-        worker_config.read_config(worker_config_dict)
+        worker_config.read_config(worker_config_dict, allow_secrets_in_config=True)
        return worker_config

    def test_old_configs_master(self) -> None:
--- a/tests/federation/test_federation_media.py
+++ b/tests/federation/test_federation_media.py
@ -147,6 +147,45 @@ class FederationMediaDownloadsTest(unittest.FederatingHomeserverTestCase):
        found_file = any(SMALL_PNG in field for field in stripped_bytes)
        self.assertTrue(found_file)

+    def test_federation_etag(self) -> None:
+        """Test that federation ETags work"""
+
+        content = io.BytesIO(b"file_to_stream")
+        content_uri = self.get_success(
+            self.media_repo.create_content(
+                "text/plain",
+                "test_upload",
+                content,
+                46,
+                UserID.from_string("@user_id:whatever.org"),
+            )
+        )
+
+        channel = self.make_signed_federation_request(
+            "GET",
+            f"/_matrix/federation/v1/media/download/{content_uri.media_id}",
+        )
+        self.pump()
+        self.assertEqual(200, channel.code)
+
+        # We expect exactly one ETag header.
+        etags = channel.headers.getRawHeaders("ETag")
+        self.assertIsNotNone(etags)
+        assert etags is not None  # For mypy
+        self.assertEqual(len(etags), 1)
+        etag = etags[0]
+
+        # Refetching with the etag should result in 304 and empty body.
+        channel = self.make_signed_federation_request(
+            "GET",
+            f"/_matrix/federation/v1/media/download/{content_uri.media_id}",
+            custom_headers=[("If-None-Match", etag)],
+        )
+        self.pump()
+        self.assertEqual(channel.code, 304)
+        self.assertEqual(channel.is_finished(), True)
+        self.assertNotIn("body", channel.result)
+

 class FederationThumbnailTest(unittest.FederatingHomeserverTestCase):
    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
--- a/tests/handlers/test_directory.py
+++ b/tests/handlers/test_directory.py
@ -587,6 +587,7 @@ class TestRoomListSearchDisabled(unittest.HomeserverTestCase):
        self.room_list_handler = hs.get_room_list_handler()
        self.directory_handler = hs.get_directory_handler()

+    @unittest.override_config({"room_list_publication_rules": [{"action": "allow"}]})
    def test_disabling_room_list(self) -> None:
        self.room_list_handler.enable_room_list_search = True
        self.directory_handler.enable_room_list_search = True
--- a/tests/handlers/test_oauth_delegation.py
+++ b/tests/handlers/test_oauth_delegation.py
@ -43,6 +43,7 @@ from synapse.api.errors import (
    OAuthInsufficientScopeError,
    SynapseError,
 )
+from synapse.appservice import ApplicationService
 from synapse.http.site import SynapseRequest
 from synapse.rest import admin
 from synapse.rest.client import account, devices, keys, login, logout, register
@ -379,6 +380,44 @@ class MSC3861OAuthDelegation(HomeserverTestCase):
        )
        self.assertEqual(requester.device_id, DEVICE)

+    def test_active_user_with_device_explicit_device_id(self) -> None:
+        """The handler should return a requester with normal user rights and a device ID, given explicitly, as supported by MAS 0.15+"""
+
+        self.http_client.request = AsyncMock(
+            return_value=FakeResponse.json(
+                code=200,
+                payload={
+                    "active": True,
+                    "sub": SUBJECT,
+                    "scope": " ".join([MATRIX_USER_SCOPE]),
+                    "device_id": DEVICE,
+                    "username": USERNAME,
+                },
+            )
+        )
+        request = Mock(args={})
+        request.args[b"access_token"] = [b"mockAccessToken"]
+        request.requestHeaders.getRawHeaders = mock_getRawHeaders()
+        requester = self.get_success(self.auth.get_user_by_req(request))
+        self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
+        self.http_client.request.assert_called_once_with(
+            method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
+        )
+        # It should have called with the 'X-MAS-Supports-Device-Id: 1' header
+        self.assertEqual(
+            self.http_client.request.call_args[1]["headers"].getRawHeaders(
+                b"X-MAS-Supports-Device-Id",
+            ),
+            [b"1"],
+        )
+        self._assertParams()
+        self.assertEqual(requester.user.to_string(), "@%s:%s" % (USERNAME, SERVER_NAME))
+        self.assertEqual(requester.is_guest, False)
+        self.assertEqual(
+            get_awaitable_result(self.auth.is_server_admin(requester)), False
+        )
+        self.assertEqual(requester.device_id, DEVICE)
+
    def test_multiple_devices(self) -> None:
        """The handler should raise an error if multiple devices are found in the scope."""

@ -575,6 +614,16 @@ class MSC3861OAuthDelegation(HomeserverTestCase):
            channel.json_body["errcode"], Codes.UNRECOGNIZED, channel.json_body
        )

+    def expect_forbidden(
+        self, method: str, path: str, content: Union[bytes, str, JsonDict] = ""
+    ) -> None:
+        channel = self.make_request(method, path, content)
+
+        self.assertEqual(channel.code, 403, channel.json_body)
+        self.assertEqual(
+            channel.json_body["errcode"], Codes.FORBIDDEN, channel.json_body
+        )
+
    def test_uia_endpoints(self) -> None:
        """Test that endpoints that were removed in MSC2964 are no longer available."""

@ -629,11 +678,35 @@ class MSC3861OAuthDelegation(HomeserverTestCase):

    def test_registration_endpoints_removed(self) -> None:
        """Test that registration endpoints that were removed in MSC2964 are no longer available."""
+        appservice = ApplicationService(
+            token="i_am_an_app_service",
+            id="1234",
+            namespaces={"users": [{"regex": r"@alice:.+", "exclusive": True}]},
+            sender="@as_main:test",
+        )
+
+        self.hs.get_datastores().main.services_cache = [appservice]
        self.expect_unrecognized(
            "GET", "/_matrix/client/v1/register/m.login.registration_token/validity"
        )
+
+        # Registration is disabled
+        self.expect_forbidden(
+            "POST",
+            "/_matrix/client/v3/register",
+            {"username": "alice", "password": "hunter2"},
+        )
+
        # This is still available for AS registrations
-        # self.expect_unrecognized("POST", "/_matrix/client/v3/register")
+        channel = self.make_request(
+            "POST",
+            "/_matrix/client/v3/register",
+            {"username": "alice", "type": "m.login.application_service"},
+            shorthand=False,
+            access_token="i_am_an_app_service",
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+
        self.expect_unrecognized("GET", "/_matrix/client/v3/register/available")
        self.expect_unrecognized(
            "POST", "/_matrix/client/v3/register/email/requestToken"
--- a/tests/handlers/test_oidc.py
+++ b/tests/handlers/test_oidc.py
@ -57,6 +57,7 @@ CLIENT_ID = "test-client-id"
 CLIENT_SECRET = "test-client-secret"
 BASE_URL = "https://synapse/"
 CALLBACK_URL = BASE_URL + "_synapse/client/oidc/callback"
+TEST_REDIRECT_URI = "https://test/oidc/callback"
 SCOPES = ["openid"]

 # config for common cases
@ -70,12 +71,16 @@ DEFAULT_CONFIG = {
 }

 # extends the default config with explicit OAuth2 endpoints instead of using discovery
+#
+# We add "explicit" to things to make them different from the discovered values to make
+# sure that the explicit values override the discovered ones.
 EXPLICIT_ENDPOINT_CONFIG = {
    **DEFAULT_CONFIG,
    "discover": False,
-    "authorization_endpoint": ISSUER + "authorize",
-    "token_endpoint": ISSUER + "token",
-    "jwks_uri": ISSUER + "jwks",
+    "authorization_endpoint": ISSUER + "authorize-explicit",
+    "token_endpoint": ISSUER + "token-explicit",
+    "jwks_uri": ISSUER + "jwks-explicit",
+    "id_token_signing_alg_values_supported": ["RS256", "<explicit>"],
 }


@ -259,12 +264,64 @@ class OidcHandlerTestCase(HomeserverTestCase):
        self.get_success(self.provider.load_metadata())
        self.fake_server.get_metadata_handler.assert_not_called()

+    @override_config({"oidc_config": {**EXPLICIT_ENDPOINT_CONFIG, "discover": True}})
+    def test_discovery_with_explicit_config(self) -> None:
+        """
+        The handler should discover the endpoints from OIDC discovery document but
+        values are overriden by the explicit config.
+        """
+        # This would throw if some metadata were invalid
+        metadata = self.get_success(self.provider.load_metadata())
+        self.fake_server.get_metadata_handler.assert_called_once()
+
+        self.assertEqual(metadata.issuer, self.fake_server.issuer)
+        # It seems like authlib does not have that defined in its metadata models
+        self.assertEqual(
+            metadata.get("userinfo_endpoint"),
+            self.fake_server.userinfo_endpoint,
+        )
+
+        # Ensure the values are overridden correctly since these were configured
+        # explicitly
+        self.assertEqual(
+            metadata.authorization_endpoint,
+            EXPLICIT_ENDPOINT_CONFIG["authorization_endpoint"],
+        )
+        self.assertEqual(
+            metadata.token_endpoint, EXPLICIT_ENDPOINT_CONFIG["token_endpoint"]
+        )
+        self.assertEqual(metadata.jwks_uri, EXPLICIT_ENDPOINT_CONFIG["jwks_uri"])
+        self.assertEqual(
+            metadata.id_token_signing_alg_values_supported,
+            EXPLICIT_ENDPOINT_CONFIG["id_token_signing_alg_values_supported"],
+        )
+
+        # subsequent calls should be cached
+        self.reset_mocks()
+        self.get_success(self.provider.load_metadata())
+        self.fake_server.get_metadata_handler.assert_not_called()
+
    @override_config({"oidc_config": EXPLICIT_ENDPOINT_CONFIG})
    def test_no_discovery(self) -> None:
        """When discovery is disabled, it should not try to load from discovery document."""
-        self.get_success(self.provider.load_metadata())
+        metadata = self.get_success(self.provider.load_metadata())
        self.fake_server.get_metadata_handler.assert_not_called()

+        # Ensure the values are overridden correctly since these were configured
+        # explicitly
+        self.assertEqual(
+            metadata.authorization_endpoint,
+            EXPLICIT_ENDPOINT_CONFIG["authorization_endpoint"],
+        )
+        self.assertEqual(
+            metadata.token_endpoint, EXPLICIT_ENDPOINT_CONFIG["token_endpoint"]
+        )
+        self.assertEqual(metadata.jwks_uri, EXPLICIT_ENDPOINT_CONFIG["jwks_uri"])
+        self.assertEqual(
+            metadata.id_token_signing_alg_values_supported,
+            EXPLICIT_ENDPOINT_CONFIG["id_token_signing_alg_values_supported"],
+        )
+
    @override_config({"oidc_config": DEFAULT_CONFIG})
    def test_load_jwks(self) -> None:
        """JWKS loading is done once (then cached) if used."""
@ -530,6 +587,24 @@ class OidcHandlerTestCase(HomeserverTestCase):
        code_verifier = get_value_from_macaroon(macaroon, "code_verifier")
        self.assertEqual(code_verifier, "")

+    @override_config(
+        {"oidc_config": {**DEFAULT_CONFIG, "redirect_uri": TEST_REDIRECT_URI}}
+    )
+    def test_redirect_request_with_overridden_redirect_uri(self) -> None:
+        """The authorization endpoint redirect has the overridden `redirect_uri` value."""
+        req = Mock(spec=["cookies"])
+        req.cookies = []
+
+        url = urlparse(
+            self.get_success(
+                self.provider.handle_redirect_request(req, b"http://client/redirect")
+            )
+        )
+
+        # Ensure that the redirect_uri in the returned url has been overridden.
+        params = parse_qs(url.query)
+        self.assertEqual(params["redirect_uri"], [TEST_REDIRECT_URI])
+
    @override_config({"oidc_config": DEFAULT_CONFIG})
    def test_callback_error(self) -> None:
        """Errors from the provider returned in the callback are displayed."""
@ -897,6 +972,37 @@ class OidcHandlerTestCase(HomeserverTestCase):
        self.assertEqual(args["client_id"], [CLIENT_ID])
        self.assertEqual(args["redirect_uri"], [CALLBACK_URL])

+    @override_config(
+        {
+            "oidc_config": {
+                **DEFAULT_CONFIG,
+                "redirect_uri": TEST_REDIRECT_URI,
+            }
+        }
+    )
+    def test_code_exchange_with_overridden_redirect_uri(self) -> None:
+        """Code exchange behaves correctly and handles various error scenarios."""
+        # Set up a fake IdP with a token endpoint handler.
+        token = {
+            "type": "Bearer",
+            "access_token": "aabbcc",
+        }
+
+        self.fake_server.post_token_handler.side_effect = None
+        self.fake_server.post_token_handler.return_value = FakeResponse.json(
+            payload=token
+        )
+        code = "code"
+
+        # Exchange the code against the fake IdP.
+        self.get_success(self.provider._exchange_code(code, code_verifier=""))
+
+        # Check that the `redirect_uri` parameter provided matches our
+        # overridden config value.
+        kwargs = self.fake_server.request.call_args[1]
+        args = parse_qs(kwargs["data"].decode("utf-8"))
+        self.assertEqual(args["redirect_uri"], [TEST_REDIRECT_URI])
+
    @override_config(
        {
            "oidc_config": {
--- a/tests/handlers/test_room_list.py
+++ b/tests/handlers/test_room_list.py
@ -6,6 +6,7 @@ from synapse.rest.client import directory, login, room
 from synapse.types import JsonDict

 from tests import unittest
+from tests.utils import default_config


 class RoomListHandlerTestCase(unittest.HomeserverTestCase):
@ -30,6 +31,11 @@ class RoomListHandlerTestCase(unittest.HomeserverTestCase):
        assert channel.code == HTTPStatus.OK, f"couldn't publish room: {channel.result}"
        return room_id

+    def default_config(self) -> JsonDict:
+        config = default_config("test")
+        config["room_list_publication_rules"] = [{"action": "allow"}]
+        return config
+
    def test_acls_applied_to_room_directory_results(self) -> None:
        """
        Creates 3 rooms. Room 2 has an ACL that only permits the homeservers
--- a/tests/rest/admin/test_room.py
+++ b/tests/rest/admin/test_room.py
@ -1282,6 +1282,7 @@ class RoomTestCase(unittest.HomeserverTestCase):
        self.admin_user = self.register_user("admin", "pass", admin=True)
        self.admin_user_tok = self.login("admin", "pass")

+    @unittest.override_config({"room_list_publication_rules": [{"action": "allow"}]})
    def test_list_rooms(self) -> None:
        """Test that we can list rooms"""
        # Create 3 test rooms
@ -1795,6 +1796,7 @@ class RoomTestCase(unittest.HomeserverTestCase):
        self.assertEqual(room_id, channel.json_body["rooms"][0].get("room_id"))
        self.assertEqual("ж", channel.json_body["rooms"][0].get("name"))

+    @unittest.override_config({"room_list_publication_rules": [{"action": "allow"}]})
    def test_filter_public_rooms(self) -> None:
        self.helper.create_room_as(
            self.admin_user, tok=self.admin_user_tok, is_public=True
@ -1872,6 +1874,7 @@ class RoomTestCase(unittest.HomeserverTestCase):
        self.assertEqual(1, response.json_body["total_rooms"])
        self.assertEqual(1, len(response.json_body["rooms"]))

+    @unittest.override_config({"room_list_publication_rules": [{"action": "allow"}]})
    def test_single_room(self) -> None:
        """Test that a single room can be requested correctly"""
        # Create two test rooms
--- a/tests/rest/client/test_delayed_events.py
+++ b/tests/rest/client/test_delayed_events.py
@ -109,6 +109,27 @@ class DelayedEventsTestCase(HomeserverTestCase):
        )
        self.assertEqual(setter_expected, content.get(setter_key), content)

+    @unittest.override_config(
+        {"rc_delayed_event_mgmt": {"per_second": 0.5, "burst_count": 1}}
+    )
+    def test_get_delayed_events_ratelimit(self) -> None:
+        args = ("GET", PATH_PREFIX)
+
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(self.user_id, 0, 0)
+        )
+
+        # Test that the request isn't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
    def test_update_delayed_event_without_id(self) -> None:
        channel = self.make_request(
            "POST",
@ -206,6 +227,46 @@ class DelayedEventsTestCase(HomeserverTestCase):
            expect_code=HTTPStatus.NOT_FOUND,
        )

+    @unittest.override_config(
+        {"rc_delayed_event_mgmt": {"per_second": 0.5, "burst_count": 1}}
+    )
+    def test_cancel_delayed_event_ratelimit(self) -> None:
+        delay_ids = []
+        for _ in range(2):
+            channel = self.make_request(
+                "POST",
+                _get_path_for_delayed_send(self.room_id, _EVENT_TYPE, 100000),
+                {},
+            )
+            self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+            delay_id = channel.json_body.get("delay_id")
+            self.assertIsNotNone(delay_id)
+            delay_ids.append(delay_id)
+
+        channel = self.make_request(
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "cancel"},
+        )
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
+        args = (
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "cancel"},
+        )
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(self.user_id, 0, 0)
+        )
+
+        # Test that the request isn't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
    def test_send_delayed_state_event(self) -> None:
        state_key = "to_send_on_request"

@ -250,6 +311,44 @@ class DelayedEventsTestCase(HomeserverTestCase):
        )
        self.assertEqual(setter_expected, content.get(setter_key), content)

+    @unittest.override_config({"rc_message": {"per_second": 3.5, "burst_count": 4}})
+    def test_send_delayed_event_ratelimit(self) -> None:
+        delay_ids = []
+        for _ in range(2):
+            channel = self.make_request(
+                "POST",
+                _get_path_for_delayed_send(self.room_id, _EVENT_TYPE, 100000),
+                {},
+            )
+            self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+            delay_id = channel.json_body.get("delay_id")
+            self.assertIsNotNone(delay_id)
+            delay_ids.append(delay_id)
+
+        channel = self.make_request(
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "send"},
+        )
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
+        args = (
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "send"},
+        )
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(self.user_id, 0, 0)
+        )
+
+        # Test that the request isn't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
    def test_restart_delayed_state_event(self) -> None:
        state_key = "to_send_on_restarted_timeout"

@ -309,6 +408,46 @@ class DelayedEventsTestCase(HomeserverTestCase):
        )
        self.assertEqual(setter_expected, content.get(setter_key), content)

+    @unittest.override_config(
+        {"rc_delayed_event_mgmt": {"per_second": 0.5, "burst_count": 1}}
+    )
+    def test_restart_delayed_event_ratelimit(self) -> None:
+        delay_ids = []
+        for _ in range(2):
+            channel = self.make_request(
+                "POST",
+                _get_path_for_delayed_send(self.room_id, _EVENT_TYPE, 100000),
+                {},
+            )
+            self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+            delay_id = channel.json_body.get("delay_id")
+            self.assertIsNotNone(delay_id)
+            delay_ids.append(delay_id)
+
+        channel = self.make_request(
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "restart"},
+        )
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
+        args = (
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "restart"},
+        )
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(self.user_id, 0, 0)
+        )
+
+        # Test that the request isn't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
    def test_delayed_state_events_are_cancelled_by_more_recent_state(self) -> None:
        state_key = "to_be_cancelled"

@ -374,3 +513,7 @@ def _get_path_for_delayed_state(
    room_id: str, event_type: str, state_key: str, delay_ms: int
 ) -> str:
    return f"rooms/{room_id}/state/{event_type}/{state_key}?org.matrix.msc4140.delay={delay_ms}"
+
+
+def _get_path_for_delayed_send(room_id: str, event_type: str, delay_ms: int) -> str:
+    return f"rooms/{room_id}/send/{event_type}?org.matrix.msc4140.delay={delay_ms}"
--- a/tests/rest/client/test_media.py
+++ b/tests/rest/client/test_media.py
@ -2676,3 +2676,113 @@ class AuthenticatedMediaTestCase(unittest.HomeserverTestCase):
            access_token=self.tok,
        )
        self.assertEqual(channel10.code, 200)
+
+    def test_authenticated_media_etag(self) -> None:
+        """Test that ETag works correctly with authenticated media over client
+        APIs"""
+
+        # upload some local media with authentication on
+        channel = self.make_request(
+            "POST",
+            "_matrix/media/v3/upload?filename=test_png_upload",
+            SMALL_PNG,
+            self.tok,
+            shorthand=False,
+            content_type=b"image/png",
+            custom_headers=[("Content-Length", str(67))],
+        )
+        self.assertEqual(channel.code, 200)
+        res = channel.json_body.get("content_uri")
+        assert res is not None
+        uri = res.split("mxc://")[1]
+
+        # Check standard media endpoint
+        self._check_caching(f"/download/{uri}")
+
+        # check thumbnails as well
+        params = "?width=32&height=32&method=crop"
+        self._check_caching(f"/thumbnail/{uri}{params}")
+
+        # Inject a piece of remote media.
+        file_id = "abcdefg12345"
+        file_info = FileInfo(server_name="lonelyIsland", file_id=file_id)
+
+        media_storage = self.hs.get_media_repository().media_storage
+
+        ctx = media_storage.store_into_file(file_info)
+        (f, fname) = self.get_success(ctx.__aenter__())
+        f.write(SMALL_PNG)
+        self.get_success(ctx.__aexit__(None, None, None))
+
+        # we write the authenticated status when storing media, so this should pick up
+        # config and authenticate the media
+        self.get_success(
+            self.store.store_cached_remote_media(
+                origin="lonelyIsland",
+                media_id="52",
+                media_type="image/png",
+                media_length=1,
+                time_now_ms=self.clock.time_msec(),
+                upload_name="remote_test.png",
+                filesystem_id=file_id,
+            )
+        )
+
+        # ensure we have thumbnails for the non-dynamic code path
+        if self.extra_config == {"dynamic_thumbnails": False}:
+            self.get_success(
+                self.repo._generate_thumbnails(
+                    "lonelyIsland", "52", file_id, "image/png"
+                )
+            )
+
+        self._check_caching("/download/lonelyIsland/52")
+
+        params = "?width=32&height=32&method=crop"
+        self._check_caching(f"/thumbnail/lonelyIsland/52{params}")
+
+    def _check_caching(self, path: str) -> None:
+        """
+        Checks that:
+          1. fetching the path returns an ETag header
+          2. refetching with the ETag returns a 304 without a body
+          3. refetching with the ETag but through unauthenticated endpoint
+             returns 404
+        """
+
+        # Request media over authenticated endpoint, should be found
+        channel1 = self.make_request(
+            "GET",
+            f"/_matrix/client/v1/media{path}",
+            access_token=self.tok,
+            shorthand=False,
+        )
+        self.assertEqual(channel1.code, 200)
+
+        # Should have a single ETag field
+        etags = channel1.headers.getRawHeaders("ETag")
+        self.assertIsNotNone(etags)
+        assert etags is not None  # For mypy
+        self.assertEqual(len(etags), 1)
+        etag = etags[0]
+
+        # Refetching with the etag should result in 304 and empty body.
+        channel2 = self.make_request(
+            "GET",
+            f"/_matrix/client/v1/media{path}",
+            access_token=self.tok,
+            shorthand=False,
+            custom_headers=[("If-None-Match", etag)],
+        )
+        self.assertEqual(channel2.code, 304)
+        self.assertEqual(channel2.is_finished(), True)
+        self.assertNotIn("body", channel2.result)
+
+        # Refetching with the etag but no access token should result in 404.
+        channel3 = self.make_request(
+            "GET",
+            f"/_matrix/media/r0{path}",
+            shorthand=False,
+            custom_headers=[("If-None-Match", etag)],
+        )
+        self.assertEqual(channel3.code, 404)
--- a/tests/rest/client/test_rendezvous.py
+++ b/tests/rest/client/test_rendezvous.py
@ -117,10 +117,11 @@ class RendezvousServletTestCase(unittest.HomeserverTestCase):
        headers = dict(channel.headers.getAllRawHeaders())
        self.assertIn(b"ETag", headers)
        self.assertIn(b"Expires", headers)
+        self.assertIn(b"Content-Length", headers)
        self.assertEqual(headers[b"Content-Type"], [b"application/json"])
        self.assertEqual(headers[b"Access-Control-Allow-Origin"], [b"*"])
        self.assertEqual(headers[b"Access-Control-Expose-Headers"], [b"etag"])
-        self.assertEqual(headers[b"Cache-Control"], [b"no-store"])
+        self.assertEqual(headers[b"Cache-Control"], [b"no-store, no-transform"])
        self.assertEqual(headers[b"Pragma"], [b"no-cache"])
        self.assertIn("url", channel.json_body)
        self.assertTrue(channel.json_body["url"].startswith("https://"))
@ -141,9 +142,10 @@ class RendezvousServletTestCase(unittest.HomeserverTestCase):
        self.assertEqual(headers[b"ETag"], [etag])
        self.assertIn(b"Expires", headers)
        self.assertEqual(headers[b"Content-Type"], [b"text/plain"])
+        self.assertEqual(headers[b"Content-Length"], [b"7"])
        self.assertEqual(headers[b"Access-Control-Allow-Origin"], [b"*"])
        self.assertEqual(headers[b"Access-Control-Expose-Headers"], [b"etag"])
-        self.assertEqual(headers[b"Cache-Control"], [b"no-store"])
+        self.assertEqual(headers[b"Cache-Control"], [b"no-store, no-transform"])
        self.assertEqual(headers[b"Pragma"], [b"no-cache"])
        self.assertEqual(channel.text_body, "foo=bar")

--- a/tests/rest/client/test_rooms.py
+++ b/tests/rest/client/test_rooms.py
@ -67,6 +67,7 @@ from tests.http.server._base import make_request_with_cancellation_test
 from tests.storage.test_stream import PaginationTestCase
 from tests.test_utils.event_injection import create_event
 from tests.unittest import override_config
+from tests.utils import default_config

 PATH_PREFIX = b"/_matrix/client/api/v1"

@ -1371,6 +1372,23 @@ class RoomJoinTestCase(RoomBase):
        )
        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")

+    def test_suspended_user_can_leave_room(self) -> None:
+        channel = self.make_request(
+            "POST", f"/join/{self.room1}", access_token=self.tok1
+        )
+        self.assertEqual(channel.code, 200)
+
+        # set the user as suspended
+        self.get_success(self.store.set_user_suspended_status(self.user1, True))
+
+        # leave room
+        channel = self.make_request(
+            "POST",
+            f"/rooms/{self.room1}/leave",
+            access_token=self.tok1,
+        )
+        self.assertEqual(channel.code, 200)
+

 class RoomAppserviceTsParamTestCase(unittest.HomeserverTestCase):
    servlets = [
@ -2381,6 +2399,41 @@ class RoomDelayedEventTestCase(RoomBase):
        )
        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)

+    @unittest.override_config(
+        {
+            "max_event_delay_duration": "24h",
+            "rc_message": {"per_second": 1, "burst_count": 2},
+        }
+    )
+    def test_add_delayed_event_ratelimit(self) -> None:
+        """Test that requests to schedule new delayed events are ratelimited by a RateLimiter,
+        which ratelimits them correctly, including by not limiting when the requester is
+        exempt from ratelimiting.
+        """
+
+        # Test that new delayed events are correctly ratelimited.
+        args = (
+            "POST",
+            (
+                "rooms/%s/send/m.room.message?org.matrix.msc4140.delay=2000"
+                % self.room_id
+            ).encode("ascii"),
+            {"body": "test", "msgtype": "m.text"},
+        )
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(self.user_id, 0, 0)
+        )
+
+        # Test that the new delayed events aren't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+

 class RoomSearchTestCase(unittest.HomeserverTestCase):
    servlets = [
@ -2548,6 +2601,11 @@ class PublicRoomsRoomTypeFilterTestCase(unittest.HomeserverTestCase):
            tok=self.token,
        )

+    def default_config(self) -> JsonDict:
+        config = default_config("test")
+        config["room_list_publication_rules"] = [{"action": "allow"}]
+        return config
+
    def make_public_rooms_request(
        self,
        room_types: Optional[List[Union[str, None]]],
@ -3989,10 +4047,25 @@ class UserSuspensionTests(unittest.HomeserverTestCase):
        self.user2 = self.register_user("teresa", "hackme")
        self.tok2 = self.login("teresa", "hackme")

-        self.room1 = self.helper.create_room_as(room_creator=self.user1, tok=self.tok1)
+        self.admin = self.register_user("admin", "pass", True)
+        self.admin_tok = self.login("admin", "pass")
+
+        self.room1 = self.helper.create_room_as(
+            room_creator=self.user1, tok=self.tok1, room_version="11"
+        )
        self.store = hs.get_datastores().main

-    def test_suspended_user_cannot_send_message_to_room(self) -> None:
+        self.room2 = self.helper.create_room_as(
+            room_creator=self.user1, is_public=False, tok=self.tok1
+        )
+        self.helper.send_state(
+            self.room2,
+            EventTypes.RoomEncryption,
+            {EventContentFields.ENCRYPTION_ALGORITHM: "m.megolm.v1.aes-sha2"},
+            tok=self.tok1,
+        )
+
+    def test_suspended_user_cannot_send_message_to_public_room(self) -> None:
        # set the user as suspended
        self.get_success(self.store.set_user_suspended_status(self.user1, True))

@ -4004,6 +4077,24 @@ class UserSuspensionTests(unittest.HomeserverTestCase):
        )
        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")

+    def test_suspended_user_cannot_send_message_to_encrypted_room(self) -> None:
+        channel = self.make_request(
+            "PUT",
+            f"/_synapse/admin/v1/suspend/{self.user1}",
+            {"suspend": True},
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.json_body, {f"user_{self.user1}_suspended": True})
+
+        channel = self.make_request(
+            "PUT",
+            f"/rooms/{self.room2}/send/m.room.encrypted/1",
+            access_token=self.tok1,
+            content={},
+        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
+
    def test_suspended_user_cannot_change_profile_data(self) -> None:
        # set the user as suspended
        self.get_success(self.store.set_user_suspended_status(self.user1, True))
@ -4069,3 +4160,51 @@ class UserSuspensionTests(unittest.HomeserverTestCase):
            shorthand=False,
        )
        self.assertEqual(channel.code, 200)
+
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/v3/rooms/{self.room1}/send/m.room.redaction/3456346",
+            access_token=self.tok1,
+            content={"reason": "bogus", "redacts": event_id},
+            shorthand=False,
+        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
+
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/v3/rooms/{self.room1}/send/m.room.redaction/3456346",
+            access_token=self.tok1,
+            content={"reason": "bogus", "redacts": event_id2},
+            shorthand=False,
+        )
+        self.assertEqual(channel.code, 200)
+
+    def test_suspended_user_cannot_ban_others(self) -> None:
+        # user to ban joins room user1 created
+        self.make_request("POST", f"/rooms/{self.room1}/join", access_token=self.tok2)
+
+        # suspend user1
+        self.get_success(self.store.set_user_suspended_status(self.user1, True))
+
+        # user1 tries to ban other user while suspended
+        channel = self.make_request(
+            "POST",
+            f"/_matrix/client/v3/rooms/{self.room1}/ban",
+            access_token=self.tok1,
+            content={"reason": "spite", "user_id": self.user2},
+            shorthand=False,
+        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
+
+        # un-suspend user1
+        self.get_success(self.store.set_user_suspended_status(self.user1, False))
+
+        # ban now goes through
+        channel = self.make_request(
+            "POST",
+            f"/_matrix/client/v3/rooms/{self.room1}/ban",
+            access_token=self.tok1,
+            content={"reason": "spite", "user_id": self.user2},
+            shorthand=False,
+        )
+        self.assertEqual(channel.code, 200)
--- a/tests/storage/test_purge.py
+++ b/tests/storage/test_purge.py
@ -247,7 +247,7 @@ class PurgeTests(HomeserverTestCase):
            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
        )

-        # We expect that the unreferenced state group has been deleted.
+        # We expect that the unreferenced state group has been deleted from all tables.
        row = self.get_success(
            self.state_store.db_pool.simple_select_one_onecol(
                table="state_groups",
@ -259,6 +259,39 @@ class PurgeTests(HomeserverTestCase):
        )
        self.assertIsNone(row)

+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_groups_state",
+                keyvalues={"state_group": unreferenced_state_group},
+                retcol="state_group",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+
+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_group_edges",
+                keyvalues={"state_group": unreferenced_state_group},
+                retcol="state_group",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+
+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_groups_pending_deletion",
+                keyvalues={"state_group": unreferenced_state_group},
+                retcol="state_group",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+
        # We expect there to now only be one state group for the room, which is
        # the state group of the last event (as the only outlier).
        state_groups = self.get_success(
				`@ -0,0 +1 @@`
				`Fix detection of workflow failures in the release script.`