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# Set the version to match that which is in go.mod
ARG GO_VERSION="build-arg-must-be-provided"
FROM --platform=${BUILDPLATFORM} golang:${GO_VERSION}-alpine AS builder
WORKDIR /proj
COPY go.mod ./
COPY go.sum ./
RUN go mod download
COPY *.go ./
ARG TARGETOS TARGETARCH
RUN GOOS=$TARGETOS GOARCH=$TARGETARCH go build -o lk-jwt-service
# set up nsswitch.conf for Go's "netgo" implementation
# - https://github.com/golang/go/blob/go1.24.0/src/net/conf.go#L343
RUN echo 'hosts: files dns' > /etc/nsswitch.conf
FROM scratch
COPY --from=builder /proj/lk-jwt-service /lk-jwt-service
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /etc/nsswitch.conf /etc/nsswitch.conf
EXPOSE 8080
CMD [ "/lk-jwt-service" ]

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You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<http://www.gnu.org/licenses/>.

6
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@ -0,0 +1,6 @@
Licensees holding a valid commercial license with Element may use this
software in accordance with the terms contained in a written agreement
between you and Element.
To purchase a commercial license please contact our sales team at
licensing@element.io

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# 🎥 MatrixRTC Authorization Service
The **MatrixRTC Authorization Service** bridges Matrix and LiveKit, handling
authentication and room creation when needed.
## 💡 TL;DR
Matrix user wants to start or join a call?
👤 ➡️ Gets OpenID token ➡️ Sends it to the **MatrixRTC Authorization Service** ➡️
Receives LiveKit JWT ➡️
- **If full-access user** ➡️ Can trigger LiveKit room creation (if needed) ➡️
Joins the call 🎉
- **If restricted user** ➡️ Can join existing rooms ➡️ Joins the call 🎉
📡 Once connected, the LiveKit SFU handles all real-time media routing so
participants can see and hear each other.
## 🏗️ MatrixRTC Stack: Architecture Overview
<p align="center">
<img src="https://github.com/element-hq/element-call/raw/livekit/docs/Federated_Setup.drawio.png" alt="MatrixRTC Architecture">
</p>
## 📌 When to Use
This service is part of the **MatrixRTC stack** and is primarily used when the
[LiveKit RTC backend (MSC4195)](https://github.com/matrix-org/matrix-spec-proposals/pull/4195)
is in use.
As outlined in the
[Element Call Self-Hosting Guide](https://github.com/element-hq/element-call/blob/livekit/docs/self-hosting.md),
you’ll also need:
- A [LiveKit SFU](https://github.com/livekit/livekit)
- MatrixRTC-compatible clients such as
[Element Call](https://github.com/element-hq/element-call), which can run
either:
- As a standalone Single Page Application (SPA) or
- Embedded for in-app calling
## ✨ What It Does
🔑 **Generates JWT tokens** for a given LiveKit identity and room derived from
the Matrix user and Matrix room, allowing users to authenticate with the LiveKit
SFU.
🛡️ **Manages user access levels** to ensure the proper and secure use of
infrastructure:
- **Full-access users** — Matrix users from homeservers in the same or related
deployment as the MatrixRTC backend. Can trigger automatic LiveKit room
creation if needed.
- **Restricted users** — All other Matrix users. Can join existing LiveKit SFU
rooms, but cannot auto-create new ones.
🏗️ **Auto-creates LiveKit rooms** for full-access users if they don’t already
exist.
> [!NOTE]
> This setup ensures resources are used appropriately while still supporting
> seamless cross-federation MatrixRTC sessions, e.g., video calls. Remote users
> (not on the same deployment) can join existing rooms, but only full-access
> (local) users can trigger room creation. The SFU selection algorithm and event
> ordering ensure that conferences across Matrix federation remain fully
> functional.
## 🗺️ How It Works — Token Exchange Flow
```mermaid
sequenceDiagram
participant U as 🧑 User
participant M as 🏢 Matrix Homeserver
participant A as 🔐 MatrixRTC Authorization Service
participant L as 📡 LiveKit SFU
U->>M: Requests OpenID token
M-->>U: Returns OpenID token
U->>A: Sends OpenID token & room request
A->>M: Validates token via OpenID API
M-->>A: Confirms user identity
A->>A: Generates LiveKit JWT
A->>L: (If full-access user) Create room if missing
A-->>U: Returns LiveKit JWT
U->>L: Connects to room using JWT
```
## 🚀 Installation
Releases are available
**[here](https://github.com/element-hq/lk-jwt-service/releases)**.
### 🐳 From Docker Image
```shell
docker run -e LIVEKIT_URL="ws://somewhere" -e LIVEKIT_KEY=devkey -e LIVEKIT_SECRET=secret -e LIVEKIT_FULL_ACCESS_HOMESERVERS=example.com -p 8080:8080 ghcr.io/element-hq/lk-jwt-service:0.3.0
```
### 📦 From Release
1. Download & mark as executable (example is amd64, replace with arm64 if needed):
```shell
wget https://github.com/element-hq/lk-jwt-service/releases/latest/download/lk-jwt-service_linux_amd64
chmod +x lk-jwt-service_linux_amd64
```
3. Run locally:
```shell
LIVEKIT_URL="ws://somewhere" LIVEKIT_KEY=devkey LIVEKIT_SECRET=secret LIVEKIT_FULL_ACCESS_HOMESERVERS=example.com ./lk-jwt-service_linux_amd64
```
## ⚙️ Configuration
Set environment variables to configure the service:
| Variable | Description | Required | Default |
| --------------------------------------------- | ------------------------------------------------------------- | ---------------------------------------------------- | ------- |
| `LIVEKIT_URL` | WebSocket URL of the LiveKit SFU | ✅ Yes | |
| `LIVEKIT_KEY` / `LIVEKIT_KEY_FROM_FILE` | API key or file path for LiveKit SFU | ✅ Yes | |
| `LIVEKIT_SECRET` / `LIVEKIT_SECRET_FROM_FILE` | API secret or file path for LiveKit SFU | ✅ Yes | |
| `LIVEKIT_KEY_FILE` | File path with `APIkey: secret` format | ⚠️ mutually exclusive with <code>LIVEKIT_{KEY&#124;SECRET}</code> | |
| `LIVEKIT_JWT_BIND` | Address to bind the server to | ❌ No, ⚠️ mutually exclusive with `LIVEKIT_JWT_PORT` | `:8080` |
| `LIVEKIT_JWT_PORT` | ⚠️ Deprecated Port to bind the server to | ❌ No, ⚠️ mutually exclusive with `LIVEKIT_JWT_BIND` | |
| `LIVEKIT_FULL_ACCESS_HOMESERVERS` | Comma-separated list of full-access homeservers (`*` for all) | ❌ No | `*` |
> [!IMPORTANT]
> By default, the LiveKit SFU auto-creates rooms for all users. To ensure proper
> access control, update your LiveKit
> [config.yaml](https://github.com/livekit/livekit/blob/7350e9933107ecdea4ada8f8bcb0d6ca78b3f8f7/config-sample.yaml#L170)
> to **disable automatic room creation**.
**LiveKit SFU config should include:**
```yaml
room:
auto_create: false
```
## 🔒 Transport Layer Security (TLS) Setup Using a Reverse Proxy
To properly secure the MatrixRTC Authorization Service, a reverse proxy is
recommended.
### Example Caddy Config
```caddy
matrix-rtc.domain.tld {
bind xx.xx.xx.xx
handle /livekit/jwt* {
reverse_proxy localhost:8080
}
}
```
### Example Nginx Config
```nginx
server {
listen 80;
server_name matrix-rtc.domain.tld;
# Redirect HTTP → HTTPS
return 301 https://$host$request_uri;
}
server {
listen 443 ssl;
server_name matrix-rtc.domain.tld;
# TLS certificate paths (replace with your own)
ssl_certificate /etc/ssl/certs/matrix-rtc.crt;
ssl_certificate_key /etc/ssl/private/matrix-rtc.key;
# TLS settings (minimal)
ssl_protocols TLSv1.2 TLSv1.3;
ssl_ciphers HIGH:!aNULL:!MD5;
location /livekit/jwt/ {
proxy_pass http://localhost:8080/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
}
```
## 📌 Do Not Forget to Update Your Matrix Site's `.well-known/matrix/client`
For proper MatrixRTC functionality, you need to configure your site's
`.well-known/matrix/client`. See the
[Element Call self-hosting guide](https://github.com/element-hq/element-call/blob/livekit/docs/self-hosting.md#matrixrtc-backend-announcement)
for reference.
The following key must be included in
`https://domain.tld/.well-known/matrix/client`:
```json
"org.matrix.msc4143.rtc_foci": [
{
"type": "livekit",
"livekit_service_url": "https://matrix-rtc.domain.tld/livekit/jwt"
}
]
```
## 🧪 Development & Testing
### Disable TLS verification
For testing and debugging (e.g. in the absence of trusted certificates while
testing in a lab), you can disable TLS verification for the outgoing connection
to the Matrix homeserver by setting the environment variable
`LIVEKIT_INSECURE_SKIP_VERIFY_TLS` to `YES_I_KNOW_WHAT_I_AM_DOING`.
### 🛠️ Development Environment (Docker Compose)
Based on the
[Element Call GitHub repo](https://github.com/element-hq/element-call)
The easiest way to spin up the full Matrix stack is by using the development
environment provided by Element Call. For detailed instructions, see
[Element Call Backend Setup](https://github.com/element-hq/element-call?tab=readme-ov-file#backend).
> [!NOTE]
> To ensure your local frontend works properly, you need to add certificate
> exceptions in your browser for:
>
> - `https://localhost:3000`
> - `https://matrix-rtc.m.localhost/livekit/jwt/healthz`
> - `https://synapse.m.localhost/.well-known/matrix/client`
>
> You can do this either by adding the minimal m.localhost CA
> ([dev_tls_m.localhost.crt](https://raw.githubusercontent.com/element-hq/element-call/refs/heads/livekit/backend/dev_tls_m.localhost.crt))
> to your browser’s trusted certificates, or by visiting each URL in your
> browser and following the prompts to accept the exception.
#### 🐳 Start MatrixRTC stack without the MatrixRTC Authorization Service
```sh
git clone https://github.com/element-hq/element-call.git
cd element-call
docker-compose -f ./dev-backend-docker-compose.yml -f ./playwright-backend-docker-compose.override.yml up nginx livekit synapse redis
```
#### 🔑 Start the MatrixRTC Authorization Service locally
```sh
git clone https://github.com/element-hq/lk-jwt-service
cd lk-jwt-service
LIVEKIT_INSECURE_SKIP_VERIFY_TLS="YES_I_KNOW_WHAT_I_AM_DOING" \
LIVEKIT_URL="wss://matrix-rtc.m.localhost/livekit/sfu" \
LIVEKIT_KEY=devkey \
LIVEKIT_SECRET=secret \
LIVEKIT_JWT_PORT=6080 \
LIVEKIT_FULL_ACCESS_HOMESERVERS=synapse.m.localhost \
./lk-jwt-service
```

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module lk-jwt-service
go 1.23.0
toolchain go1.25.3
require (
github.com/golang-jwt/jwt/v5 v5.3.0
github.com/livekit/protocol v1.34.0
github.com/livekit/server-sdk-go/v2 v2.5.0
github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530
github.com/matrix-org/gomatrixserverlib v0.0.0-20250815065806-6697d93cbcba
)
require (
buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.0-20241127180247-a33202765966.1 // indirect
buf.build/go/protoyaml v0.3.1 // indirect
cel.dev/expr v0.19.0 // indirect
github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
github.com/benbjohnson/clock v1.3.5 // indirect
github.com/bep/debounce v1.2.1 // indirect
github.com/bufbuild/protovalidate-go v0.8.0 // indirect
github.com/cespare/xxhash/v2 v2.3.0 // indirect
github.com/dennwc/iters v1.0.1 // indirect
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
github.com/frostbyte73/core v0.1.1 // indirect
github.com/fsnotify/fsnotify v1.8.0 // indirect
github.com/gammazero/deque v1.0.0 // indirect
github.com/go-jose/go-jose/v3 v3.0.4 // indirect
github.com/go-logr/logr v1.4.2 // indirect
github.com/go-logr/stdr v1.2.2 // indirect
github.com/google/cel-go v0.22.1 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/gorilla/websocket v1.5.3 // indirect
github.com/hashicorp/go-set/v3 v3.0.0 // indirect
github.com/jxskiss/base62 v1.1.0 // indirect
github.com/klauspost/compress v1.17.11 // indirect
github.com/klauspost/cpuid/v2 v2.2.7 // indirect
github.com/kr/pretty v0.3.1 // indirect
github.com/lithammer/shortuuid/v4 v4.2.0 // indirect
github.com/livekit/mageutil v0.0.0-20230125210925-54e8a70427c1 // indirect
github.com/livekit/mediatransportutil v0.0.0-20241220010243-a2bdee945564 // indirect
github.com/livekit/psrpc v0.6.1-0.20250205181828-a0beed2e4126 // indirect
github.com/magefile/mage v1.15.0 // indirect
github.com/matrix-org/util v0.0.0-20221111132719-399730281e66 // indirect
github.com/nats-io/nats.go v1.38.0 // indirect
github.com/nats-io/nkeys v0.4.9 // indirect
github.com/nats-io/nuid v1.0.1 // indirect
github.com/oleiade/lane/v2 v2.0.0 // indirect
github.com/pion/datachannel v1.5.10 // indirect
github.com/pion/dtls/v3 v3.0.4 // indirect
github.com/pion/ice/v4 v4.0.6 // indirect
github.com/pion/interceptor v0.1.39 // indirect
github.com/pion/logging v0.2.3 // indirect
github.com/pion/mdns/v2 v2.0.7 // indirect
github.com/pion/randutil v0.1.0 // indirect
github.com/pion/rtcp v1.2.15 // indirect
github.com/pion/rtp v1.8.18 // indirect
github.com/pion/sctp v1.8.35 // indirect
github.com/pion/sdp/v3 v3.0.10 // indirect
github.com/pion/srtp/v3 v3.0.4 // indirect
github.com/pion/stun/v3 v3.0.0 // indirect
github.com/pion/transport/v3 v3.0.7 // indirect
github.com/pion/turn/v4 v4.0.0 // indirect
github.com/pion/webrtc/v4 v4.0.9 // indirect
github.com/puzpuzpuz/xsync/v3 v3.5.0 // indirect
github.com/redis/go-redis/v9 v9.7.3 // indirect
github.com/sirupsen/logrus v1.9.3 // indirect
github.com/stoewer/go-strcase v1.3.0 // indirect
github.com/tidwall/gjson v1.18.0 // indirect
github.com/tidwall/match v1.1.1 // indirect
github.com/tidwall/pretty v1.2.1 // indirect
github.com/tidwall/sjson v1.2.5 // indirect
github.com/twitchtv/twirp v8.1.3+incompatible // indirect
github.com/wlynxg/anet v0.0.5 // indirect
github.com/zeebo/xxh3 v1.0.2 // indirect
go.uber.org/atomic v1.11.0 // indirect
go.uber.org/multierr v1.11.0 // indirect
go.uber.org/zap v1.27.0 // indirect
go.uber.org/zap/exp v0.3.0 // indirect
golang.org/x/crypto v0.38.0 // indirect
golang.org/x/exp v0.0.0-20250207012021-f9890c6ad9f3 // indirect
golang.org/x/net v0.40.0 // indirect
golang.org/x/sync v0.14.0 // indirect
golang.org/x/sys v0.33.0 // indirect
golang.org/x/text v0.25.0 // indirect
google.golang.org/genproto/googleapis/api v0.0.0-20241202173237-19429a94021a // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20250204164813-702378808489 // indirect
google.golang.org/grpc v1.70.0 // indirect
google.golang.org/protobuf v1.36.5 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)

310
lk-jwt-service/go.sum Normal file
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@ -0,0 +1,310 @@
buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.0-20241127180247-a33202765966.1 h1:ntAj16eF7AtUyzOOAFk5gvbAO52QmUKPKk7GmsIEORo=
buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.0-20241127180247-a33202765966.1/go.mod h1:AxRT+qTj5PJCz2nyQzsR/qxAcveW5USRhJTt/edTO5w=
buf.build/go/protoyaml v0.3.1 h1:ucyzE7DRnjX+mQ6AH4JzN0Kg50ByHHu+yrSKbgQn2D4=
buf.build/go/protoyaml v0.3.1/go.mod h1:0TzNpFQDXhwbkXb/ajLvxIijqbve+vMQvWY/b3/Dzxg=
cel.dev/expr v0.19.0 h1:lXuo+nDhpyJSpWxpPVi5cPUwzKb+dsdOiw6IreM5yt0=
cel.dev/expr v0.19.0/go.mod h1:MrpN08Q+lEBs+bGYdLxxHkZoUSsCp0nSKTs0nTymJgw=
dario.cat/mergo v1.0.0 h1:AGCNq9Evsj31mOgNPcLyXc+4PNABt905YmuqPYYpBWk=
dario.cat/mergo v1.0.0/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161 h1:L/gRVlceqvL25UVaW/CKtUDjefjrs0SPonmDGUVOYP0=
github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 h1:TngWCqHvy9oXAN6lEVMRuU21PR1EtLVZJmdB18Gu3Rw=
github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5/go.mod h1:lmUJ/7eu/Q8D7ML55dXQrVaamCz2vxCfdQBasLZfHKk=
github.com/antlr4-go/antlr/v4 v4.13.0 h1:lxCg3LAv+EUK6t1i0y1V6/SLeUi0eKEKdhQAlS8TVTI=
github.com/antlr4-go/antlr/v4 v4.13.0/go.mod h1:pfChB/xh/Unjila75QW7+VU4TSnWnnk9UTnmpPaOR2g=
github.com/benbjohnson/clock v1.3.5 h1:VvXlSJBzZpA/zum6Sj74hxwYI2DIxRWuNIoXAzHZz5o=
github.com/benbjohnson/clock v1.3.5/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
github.com/bep/debounce v1.2.1 h1:v67fRdBA9UQu2NhLFXrSg0Brw7CexQekrBwDMM8bzeY=
github.com/bep/debounce v1.2.1/go.mod h1:H8yggRPQKLUhUoqrJC1bO2xNya7vanpDl7xR3ISbCJ0=
github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
github.com/bufbuild/protovalidate-go v0.8.0 h1:Xs3kCLCJ4tQiogJ0iOXm+ClKw/KviW3nLAryCGW2I3Y=
github.com/bufbuild/protovalidate-go v0.8.0/go.mod h1:JPWZInGm2y2NBg3vKDKdDIkvDjyLv31J3hLH5GIFc/Q=
github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/containerd/continuity v0.4.3 h1:6HVkalIp+2u1ZLH1J/pYX2oBVXlJZvh1X1A7bEZ9Su8=
github.com/containerd/continuity v0.4.3/go.mod h1:F6PTNCKepoxEaXLQp3wDAjygEnImnZ/7o4JzpodfroQ=
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/dennwc/iters v1.0.1 h1:XwMudE6xtS0ugEdum4HQ+iRi+5HSvaeKxJPM/VI3pJs=
github.com/dennwc/iters v1.0.1/go.mod h1:M9KuuMBeyEXYTmB7EnI9SCyALFCmPWOIxn5W1L0CjGg=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
github.com/docker/cli v26.1.4+incompatible h1:I8PHdc0MtxEADqYJZvhBrW9bo8gawKwwenxRM7/rLu8=
github.com/docker/cli v26.1.4+incompatible/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
github.com/docker/docker v27.1.1+incompatible h1:hO/M4MtV36kzKldqnA37IWhebRA+LnqqcqDja6kVaKY=
github.com/docker/docker v27.1.1+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
github.com/docker/go-connections v0.5.0 h1:USnMq7hx7gwdVZq1L49hLXaFtUdTADjXGp+uj1Br63c=
github.com/docker/go-connections v0.5.0/go.mod h1:ov60Kzw0kKElRwhNs9UlUHAE/F9Fe6GLaXnqyDdmEXc=
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github.com/puzpuzpuz/xsync/v3 v3.5.0/go.mod h1:VjzYrABPabuM4KyBh1Ftq6u8nhwY5tBPKP9jpmh0nnA=
github.com/redis/go-redis/v9 v9.7.3 h1:YpPyAayJV+XErNsatSElgRZZVCwXX9QzkKYNvO7x0wM=
github.com/redis/go-redis/v9 v9.7.3/go.mod h1:bGUrSggJ9X9GUmZpZNEOQKaANxSGgOEBRltRTZHSvrA=
github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
github.com/shoenig/test v1.7.0 h1:eWcHtTXa6QLnBvm0jgEabMRN/uJ4DMV3M8xUGgRkZmk=
github.com/shoenig/test v1.7.0/go.mod h1:UxJ6u/x2v/TNs/LoLxBNJRV9DiwBBKYxXSyczsBHFoI=
github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
github.com/stoewer/go-strcase v1.3.0 h1:g0eASXYtp+yvN9fK8sH94oCIk0fau9uV1/ZdJ0AVEzs=
github.com/stoewer/go-strcase v1.3.0/go.mod h1:fAH5hQ5pehh+j3nZfvwdk2RgEgQjAoM8wodgtPmh1xo=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
github.com/tidwall/gjson v1.14.2/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
github.com/tidwall/gjson v1.18.0 h1:FIDeeyB800efLX89e5a8Y0BNH+LOngJyGrIWxG2FKQY=
github.com/tidwall/gjson v1.18.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
github.com/tidwall/pretty v1.2.1 h1:qjsOFOWWQl+N3RsoF5/ssm1pHmJJwhjlSbZ51I6wMl4=
github.com/tidwall/pretty v1.2.1/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
github.com/tidwall/sjson v1.2.5 h1:kLy8mja+1c9jlljvWTlSazM7cKDRfJuR/bOJhcY5NcY=
github.com/tidwall/sjson v1.2.5/go.mod h1:Fvgq9kS/6ociJEDnK0Fk1cpYF4FIW6ZF7LAe+6jwd28=
github.com/twitchtv/twirp v8.1.3+incompatible h1:+F4TdErPgSUbMZMwp13Q/KgDVuI7HJXP61mNV3/7iuU=
github.com/twitchtv/twirp v8.1.3+incompatible/go.mod h1:RRJoFSAmTEh2weEqWtpPE3vFK5YBhA6bqp2l1kfCC5A=
github.com/wlynxg/anet v0.0.5 h1:J3VJGi1gvo0JwZ/P1/Yc/8p63SoW98B5dHkYDmpgvvU=
github.com/wlynxg/anet v0.0.5/go.mod h1:eay5PRQr7fIVAMbTbchTnO9gG65Hg/uYGdc7mguHxoA=
github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb h1:zGWFAtiMcyryUHoUjUJX0/lt1H2+i2Ka2n+D3DImSNo=
github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 h1:EzJWgHovont7NscjpAxXsDA8S8BMYve8Y5+7cuRE7R0=
github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=
github.com/xeipuuv/gojsonschema v1.2.0 h1:LhYJRs+L4fBtjZUfuSZIKGeVu0QRy8e5Xi7D17UxZ74=
github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
github.com/zeebo/assert v1.3.0 h1:g7C04CbJuIDKNPFHmsk4hwZDO5O+kntRxzaUoNXj+IQ=
github.com/zeebo/assert v1.3.0/go.mod h1:Pq9JiuJQpG8JLJdtkwrJESF0Foym2/D9XMU5ciN/wJ0=
github.com/zeebo/xxh3 v1.0.2 h1:xZmwmqxHZA8AI603jOQ0tMqmBr9lPeFwGg6d+xy9DC0=
github.com/zeebo/xxh3 v1.0.2/go.mod h1:5NWz9Sef7zIDm2JHfFlcQvNekmcEl9ekUZQQKCYaDcA=
go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
go.uber.org/zap v1.27.0 h1:aJMhYGrd5QSmlpLMr2MftRKl7t8J8PTZPA732ud/XR8=
go.uber.org/zap v1.27.0/go.mod h1:GB2qFLM7cTU87MWRP2mPIjqfIDnGu+VIO4V/SdhGo2E=
go.uber.org/zap/exp v0.3.0 h1:6JYzdifzYkGmTdRR59oYH+Ng7k49H9qVpWwNSsGJj3U=
go.uber.org/zap/exp v0.3.0/go.mod h1:5I384qq7XGxYyByIhHm6jg5CHkGY0nsTfbDLgDDlgJQ=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
golang.org/x/crypto v0.38.0 h1:jt+WWG8IZlBnVbomuhg2Mdq0+BBQaHbtqHEFEigjUV8=
golang.org/x/crypto v0.38.0/go.mod h1:MvrbAqul58NNYPKnOra203SB9vpuZW0e+RRZV+Ggqjw=
golang.org/x/exp v0.0.0-20250207012021-f9890c6ad9f3 h1:qNgPs5exUA+G0C96DrPwNrvLSj7GT/9D+3WMWUcUg34=
golang.org/x/exp v0.0.0-20250207012021-f9890c6ad9f3/go.mod h1:tujkw807nyEEAamNbDrEGzRav+ilXA7PCRAd6xsmwiU=
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/mod v0.24.0 h1:ZfthKaKaT4NrhGVZHO1/WDTwGES4De8KtWO0SIbNJMU=
golang.org/x/mod v0.24.0/go.mod h1:IXM97Txy2VM4PJ3gI61r1YEk/gAj6zAHN3AdZt6S9Ww=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
golang.org/x/net v0.40.0 h1:79Xs7wF06Gbdcg4kdCCIQArK11Z1hr5POQ6+fIYHNuY=
golang.org/x/net v0.40.0/go.mod h1:y0hY0exeL2Pku80/zKK7tpntoX23cqL3Oa6njdgRtds=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.14.0 h1:woo0S4Yywslg6hp4eUFjTVOyKt0RookbpAHG4c1HmhQ=
golang.org/x/sync v0.14.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
golang.org/x/text v0.25.0 h1:qVyWApTSYLk/drJRO5mDlNYskwQznZmkpV2c8q9zls4=
golang.org/x/text v0.25.0/go.mod h1:WEdwpYrmk1qmdHvhkSTNPm3app7v4rsT8F2UD6+VHIA=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
golang.org/x/tools v0.33.0 h1:4qz2S3zmRxbGIhDIAgjxvFutSvH5EfnsYrRBj0UI0bc=
golang.org/x/tools v0.33.0/go.mod h1:CIJMaWEY88juyUfo7UbgPqbC8rU2OqfAV1h2Qp0oMYI=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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google.golang.org/genproto/googleapis/api v0.0.0-20241202173237-19429a94021a/go.mod h1:jehYqy3+AhJU9ve55aNOaSml7wUXjF9x6z2LcCfpAhY=
google.golang.org/genproto/googleapis/rpc v0.0.0-20250204164813-702378808489 h1:5bKytslY8ViY0Cj/ewmRtrWHW64bNF03cAatUUFCdFI=
google.golang.org/genproto/googleapis/rpc v0.0.0-20250204164813-702378808489/go.mod h1:8BS3B93F/U1juMFq9+EDk+qOT5CO1R9IzXxG3PTqiRk=
google.golang.org/grpc v1.70.0 h1:pWFv03aZoHzlRKHWicjsZytKAiYCtNS0dHbXnIdq7jQ=
google.golang.org/grpc v1.70.0/go.mod h1:ofIJqVKDXx/JiXrwr2IG4/zwdH9txy3IlF40RmcJSQw=
google.golang.org/protobuf v1.36.5 h1:tPhr+woSbjfYvY6/GPufUoYizxw1cF/yFoxJ2fmpwlM=
google.golang.org/protobuf v1.36.5/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
gopkg.in/h2non/gock.v1 v1.1.2 h1:jBbHXgGBK/AoPVfJh5x4r/WxIrElvbLel8TCZkkZJoY=
gopkg.in/h2non/gock.v1 v1.1.2/go.mod h1:n7UGz/ckNChHiK05rDoiC4MYSunEC/lyaUm2WWaDva0=
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

638
lk-jwt-service/main.go Normal file
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@ -0,0 +1,638 @@
// Copyright 2025 Element Creations Ltd.
// Copyright 2023 - 2025 New Vector Ltd.
//
// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
// Please see LICENSE files in the repository root for full details.
package main
import (
"context"
"crypto/sha256"
"crypto/tls"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io"
"log"
"net/http"
"os"
"slices"
"strings"
"time"
"github.com/livekit/protocol/auth"
"github.com/livekit/protocol/livekit"
lksdk "github.com/livekit/server-sdk-go/v2"
"github.com/matrix-org/gomatrix"
"github.com/matrix-org/gomatrixserverlib/fclient"
"github.com/matrix-org/gomatrixserverlib/spec"
)
type Handler struct {
key, secret, lkUrl string
fullAccessHomeservers []string
skipVerifyTLS bool
}
type Config struct {
Key string
Secret string
LkUrl string
SkipVerifyTLS bool
FullAccessHomeservers []string
LkJwtBind string
}
type MatrixRTCMemberType struct {
ID string `json:"id"`
ClaimedUserID string `json:"claimed_user_id"`
ClaimedDeviceID string `json:"claimed_device_id"`
}
type OpenIDTokenType struct {
AccessToken string `json:"access_token"`
TokenType string `json:"token_type"`
MatrixServerName string `json:"matrix_server_name"`
ExpiresIn int `json:"expires_in"`
}
type LegacySFURequest struct {
Room string `json:"room"`
OpenIDToken OpenIDTokenType `json:"openid_token"`
DeviceID string `json:"device_id"`
}
type SFURequest struct {
RoomID string `json:"room_id"`
SlotID string `json:"slot_id"`
OpenIDToken OpenIDTokenType `json:"openid_token"`
Member MatrixRTCMemberType `json:"member"`
DelayedEventID string `json:"delayed_event_id"`
}
type SFUResponse struct {
URL string `json:"url"`
JWT string `json:"jwt"`
}
type MatrixErrorResponse struct {
Status int
ErrCode string
Err string
}
type ValidatableSFURequest interface {
Validate() error
}
var unpaddedBase64 = base64.StdEncoding.WithPadding(base64.NoPadding)
func (e *MatrixErrorResponse) Error() string {
return e.Err
}
func (r *SFURequest) Validate() error {
if r.RoomID == "" || r.SlotID == "" {
log.Printf("Missing room_id or slot_id: room_id='%s', slot_id='%s'", r.RoomID, r.SlotID)
return &MatrixErrorResponse{
Status: http.StatusBadRequest,
ErrCode: "M_BAD_JSON",
Err: "The request body is missing `room_id` or `slot_id`",
}
}
if r.Member.ID == "" || r.Member.ClaimedUserID == "" || r.Member.ClaimedDeviceID == "" {
log.Printf("Missing member parameters: %+v", r.Member)
return &MatrixErrorResponse{
Status: http.StatusBadRequest,
ErrCode: "M_BAD_JSON",
Err: "The request body `member` is missing a `id`, `claimed_user_id` or `claimed_device_id`",
}
}
if r.OpenIDToken.AccessToken == "" || r.OpenIDToken.MatrixServerName == "" {
log.Printf("Missing OpenID token parameters: %+v", r.OpenIDToken)
return &MatrixErrorResponse{
Status: http.StatusBadRequest,
ErrCode: "M_BAD_JSON",
Err: "The request body `openid_token` is missing a `access_token` or `matrix_server_name`",
}
}
return nil
}
func (r *LegacySFURequest) Validate() error {
if r.Room == "" {
return &MatrixErrorResponse{
Status: http.StatusBadRequest,
ErrCode: "M_BAD_JSON",
Err: "Missing room parameter",
}
}
if r.OpenIDToken.AccessToken == "" || r.OpenIDToken.MatrixServerName == "" {
return &MatrixErrorResponse{
Status: http.StatusBadRequest,
ErrCode: "M_BAD_JSON",
Err: "Missing OpenID token parameters",
}
}
return nil
}
// writeMatrixError writes a Matrix-style error response to the HTTP response writer.
func writeMatrixError(w http.ResponseWriter, status int, errCode string, errMsg string) {
w.WriteHeader(status)
if err := json.NewEncoder(w).Encode(gomatrix.RespError{
ErrCode: errCode,
Err: errMsg,
}); err != nil {
log.Printf("failed to encode json error message! %v", err)
}
}
func getJoinToken(apiKey, apiSecret, room, identity string) (string, error) {
at := auth.NewAccessToken(apiKey, apiSecret)
canPublish := true
canSubscribe := true
grant := &auth.VideoGrant{
RoomJoin: true,
RoomCreate: false,
CanPublish: &canPublish,
CanSubscribe: &canSubscribe,
Room: room,
}
at.SetVideoGrant(grant).
SetIdentity(identity).
SetValidFor(time.Hour)
return at.ToJWT()
}
var exchangeOpenIdUserInfo = func(
ctx context.Context, token OpenIDTokenType, skipVerifyTLS bool,
) (*fclient.UserInfo, error) {
if token.AccessToken == "" || token.MatrixServerName == "" {
return nil, errors.New("missing parameters in openid token")
}
if skipVerifyTLS {
log.Printf("!!! WARNING !!! Skipping TLS verification for matrix client connection to %s", token.MatrixServerName)
// Disable TLS verification on the default HTTP Transport for the well-known lookup
http.DefaultTransport.(*http.Transport).TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
}
client := fclient.NewClient(fclient.WithWellKnownSRVLookups(true), fclient.WithSkipVerify(skipVerifyTLS))
// validate the openid token by getting the user's ID
userinfo, err := client.LookupUserInfo(
ctx, spec.ServerName(token.MatrixServerName), token.AccessToken,
)
if err != nil {
log.Printf("Failed to look up user info: %v", err)
return nil, errors.New("failed to look up user info")
}
return &userinfo, nil
}
func (h *Handler) isFullAccessUser(matrixServerName string) bool {
// Grant full access if wildcard '*' is present as the only entry
if len(h.fullAccessHomeservers) == 1 && h.fullAccessHomeservers[0] == "*" {
return true
}
// Check if the matrixServerName is in the list of full-access homeservers
return slices.Contains(h.fullAccessHomeservers, matrixServerName)
}
func (h *Handler) processLegacySFURequest(r *http.Request, req *LegacySFURequest) (*SFUResponse, error) {
// Note LegacySFURequest has already been validated at this point
userInfo, err := exchangeOpenIdUserInfo(r.Context(), req.OpenIDToken, h.skipVerifyTLS)
if err != nil {
return nil, &MatrixErrorResponse{
Status: http.StatusInternalServerError,
ErrCode: "M_LOOKUP_FAILED",
Err: "Failed to look up user info from homeserver",
}
}
isFullAccessUser := h.isFullAccessUser(req.OpenIDToken.MatrixServerName)
log.Printf(
"Got Matrix user info for %s (%s)",
userInfo.Sub,
map[bool]string{true: "full access", false: "restricted access"}[isFullAccessUser],
)
// TODO: is DeviceID required? If so then we should have validated at the start
lkIdentity := userInfo.Sub + ":" + req.DeviceID
// We can hard-code the slotId since for the m.call application only the m.call#ROOM slot is defined.
// This ensures that the same LiveKit room alias being derived for the same Matrix room for both the
// LegacySFURequest (/sfu/get endpoint) and the SFURequest (/get_token endpoint).
//
// Note a mismatch between the legacy livekit_alias (which is the Matrix roomId) field in the MatrixRTC
// membership state event and the actual lkRoomAlias (as derived below and used on the SFU) which is
// part of the LiveKit JWT Token does in general NOT confuse clients as the JWT token is passed as is
// to the livekit-client SDK.
//
// This change ensures compatibility with clients using pseudonymous livekit_aliases.
slotId := "m.call#ROOM"
lkRoomAliasHash := sha256.Sum256([]byte(req.Room + "|" + slotId))
lkRoomAlias := unpaddedBase64.EncodeToString(lkRoomAliasHash[:])
token, err := getJoinToken(h.key, h.secret, lkRoomAlias, lkIdentity)
if err != nil {
return nil, &MatrixErrorResponse{
Status: http.StatusInternalServerError,
ErrCode: "M_UNKNOWN",
Err: "Internal Server Error",
}
}
if isFullAccessUser {
if err := createLiveKitRoom(r.Context(), h, lkRoomAlias, userInfo.Sub, lkIdentity); err != nil {
return nil, &MatrixErrorResponse{
Status: http.StatusInternalServerError,
ErrCode: "M_UNKNOWN",
Err: "Unable to create room on SFU",
}
}
}
return &SFUResponse{URL: h.lkUrl, JWT: token}, nil
}
func (h *Handler) processSFURequest(r *http.Request, req *SFURequest) (*SFUResponse, error) {
// Note SFURequest has already been validated at this point
userInfo, err := exchangeOpenIdUserInfo(r.Context(), req.OpenIDToken, h.skipVerifyTLS)
if err != nil {
return nil, &MatrixErrorResponse{
Status: http.StatusUnauthorized,
ErrCode: "M_UNAUTHORIZED",
Err: "The request could not be authorised.",
}
}
// Check if validated userInfo.Sub matches req.Member.ClaimedUserID
if req.Member.ClaimedUserID != userInfo.Sub {
log.Printf("Claimed user ID %s does not match token subject %s", req.Member.ClaimedUserID, userInfo.Sub)
return nil, &MatrixErrorResponse{
Status: http.StatusUnauthorized,
ErrCode: "M_UNAUTHORIZED",
Err: "The request could not be authorised.",
}
}
// Does the user belong to homeservers granted full access
isFullAccessUser := h.isFullAccessUser(req.OpenIDToken.MatrixServerName)
log.Printf(
"Got Matrix user info for %s (%s)",
userInfo.Sub,
map[bool]string{true: "full access", false: "restricted access"}[isFullAccessUser],
)
lkIdentityRaw := userInfo.Sub + "|" + req.Member.ClaimedDeviceID + "|" + req.Member.ID
lkIdentityHash := sha256.Sum256([]byte(lkIdentityRaw))
lkIdentity := unpaddedBase64.EncodeToString(lkIdentityHash[:])
lkRoomAliasHash := sha256.Sum256([]byte(req.RoomID + "|" + req.SlotID))
lkRoomAlias := unpaddedBase64.EncodeToString(lkRoomAliasHash[:])
token, err := getJoinToken(h.key, h.secret, lkRoomAlias, lkIdentity)
if err != nil {
log.Printf("Error getting LiveKit token: %v", err)
return nil, &MatrixErrorResponse{
Status: http.StatusInternalServerError,
ErrCode: "M_UNKNOWN",
Err: "Internal Server Error",
}
}
if isFullAccessUser {
if err := createLiveKitRoom(r.Context(), h, lkRoomAlias, userInfo.Sub, lkIdentity); err != nil {
return nil, &MatrixErrorResponse{
Status: http.StatusInternalServerError,
ErrCode: "M_UNKNOWN",
Err: "Unable to create room on SFU",
}
}
}
return &SFUResponse{URL: h.lkUrl, JWT: token}, nil
}
var createLiveKitRoom = func(ctx context.Context, h *Handler, room, matrixUser, lkIdentity string) error {
roomClient := lksdk.NewRoomServiceClient(h.lkUrl, h.key, h.secret)
creationStart := time.Now().Unix()
lkRoom, err := roomClient.CreateRoom(
ctx,
&livekit.CreateRoomRequest{
Name: room,
EmptyTimeout: 5 * 60, // 5 Minutes to keep the room open if no one joins
DepartureTimeout: 20, // number of seconds to keep the room after everyone leaves
MaxParticipants: 0, // 0 == no limitation
},
)
if err != nil {
return fmt.Errorf("unable to create room %s: %w", room, err)
}
// Log the room creation time and the user info
isNewRoom := lkRoom.GetCreationTime() >= creationStart && lkRoom.GetCreationTime() <= time.Now().Unix()
log.Printf(
"%s LiveKit room sid: %s (alias: %s) for full-access Matrix user %s (LiveKit identity: %s)",
map[bool]string{true: "Created", false: "Using"}[isNewRoom],
lkRoom.Sid, room, matrixUser, lkIdentity,
)
return nil
}
func (h *Handler) prepareMux() *http.ServeMux {
mux := http.NewServeMux()
mux.HandleFunc("/sfu/get", h.handle_legacy) // TODO: This is deprecated and will be removed in future versions
mux.HandleFunc("/get_token", h.handle)
mux.HandleFunc("/healthz", h.healthcheck)
return mux
}
func (h *Handler) healthcheck(w http.ResponseWriter, r *http.Request) {
log.Printf("Health check from %s", r.RemoteAddr)
if r.Method == "GET" {
w.WriteHeader(http.StatusOK)
return
} else {
w.WriteHeader(http.StatusMethodNotAllowed)
}
}
// TODO: This is deprecated and will be removed in future versions
func mapSFURequest(data *[]byte) (any, error) {
requestTypes := []ValidatableSFURequest{&LegacySFURequest{}, &SFURequest{}}
for _, req := range requestTypes {
decoder := json.NewDecoder(strings.NewReader(string(*data)))
decoder.DisallowUnknownFields()
if err := decoder.Decode(req); err == nil {
if err := req.Validate(); err != nil {
return nil, err
}
return req, nil
}
}
return nil, &MatrixErrorResponse{
Status: http.StatusBadRequest,
ErrCode: "M_BAD_JSON",
Err: "The request body was malformed, missing required fields, or contained invalid values (e.g. missing `room_id`, `slot_id`, or `openid_token`).",
}
}
// TODO: This is deprecated and will be removed in future versions
func (h *Handler) handle_legacy(w http.ResponseWriter, r *http.Request) {
log.Printf("Request from %s at \"%s\"", r.RemoteAddr, r.Header.Get("Origin"))
w.Header().Set("Content-Type", "application/json")
// Set the CORS headers
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Allow-Methods", "POST")
w.Header().Set("Access-Control-Allow-Headers", "Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token")
switch r.Method {
case "OPTIONS":
// Handle preflight request (CORS)
w.WriteHeader(http.StatusOK)
return
case "POST":
// Read request body once for later JSON parsing
body, err := io.ReadAll(r.Body)
if err != nil {
log.Printf("Error reading request body: %v", err)
writeMatrixError(w, http.StatusBadRequest, "M_NOT_JSON", "Error reading request")
return
}
var sfuAccessResponse *SFUResponse
sfuAccessRequest, err := mapSFURequest(&body)
if err != nil {
matrixErr := &MatrixErrorResponse{}
if errors.As(err, &matrixErr) {
log.Printf("Error processing request: %v", matrixErr.Err)
writeMatrixError(w, matrixErr.Status, matrixErr.ErrCode, matrixErr.Err)
return
}
}
switch sfuReq := sfuAccessRequest.(type) {
case *SFURequest:
log.Printf("Processing SFU request")
sfuAccessResponse, err = h.processSFURequest(r, sfuReq)
case *LegacySFURequest:
log.Printf("Processing legacy SFU request")
sfuAccessResponse, err = h.processLegacySFURequest(r, sfuReq)
}
if err != nil {
matrixErr := &MatrixErrorResponse{}
if errors.As(err, &matrixErr) {
log.Printf("Error processing request: %v", matrixErr.Err)
writeMatrixError(w, matrixErr.Status, matrixErr.ErrCode, matrixErr.Err)
return
}
}
if err := json.NewEncoder(w).Encode(&sfuAccessResponse); err != nil {
log.Printf("failed to encode json response! %v", err)
}
default:
w.WriteHeader(http.StatusMethodNotAllowed)
}
}
func (h *Handler) handle(w http.ResponseWriter, r *http.Request) {
log.Printf("Request from %s at \"%s\"", r.RemoteAddr, r.Header.Get("Origin"))
w.Header().Set("Content-Type", "application/json")
// Set the CORS headers
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Allow-Methods", "POST")
w.Header().Set("Access-Control-Allow-Headers", "Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token")
// Handle preflight request (CORS)
switch r.Method {
case "OPTIONS":
w.WriteHeader(http.StatusOK)
return
case "POST":
var sfuAccessRequest SFURequest
decoder := json.NewDecoder(r.Body)
decoder.DisallowUnknownFields()
if err := decoder.Decode(&sfuAccessRequest); err == nil {
if err := sfuAccessRequest.Validate(); err != nil {
matrixErr := &MatrixErrorResponse{}
if errors.As(err, &matrixErr) {
log.Printf("Error processing request: %v", matrixErr.Err)
writeMatrixError(w, matrixErr.Status, matrixErr.ErrCode, matrixErr.Err)
return
}
}
} else {
log.Printf("Error reading request body: %v", err)
writeMatrixError(w, http.StatusBadRequest, "M_NOT_JSON", "Error reading request")
return
}
log.Printf("Processing SFU request")
sfuAccessResponse, err := h.processSFURequest(r, &sfuAccessRequest)
if err != nil {
matrixErr := &MatrixErrorResponse{}
if errors.As(err, &matrixErr) {
log.Printf("Error processing request: %v", matrixErr.Err)
writeMatrixError(w, matrixErr.Status, matrixErr.ErrCode, matrixErr.Err)
return
}
}
if err := json.NewEncoder(w).Encode(&sfuAccessResponse); err != nil {
log.Printf("failed to encode json response! %v", err)
}
default:
w.WriteHeader(http.StatusMethodNotAllowed)
}
}
func readKeySecret() (string, string) {
// We initialize keys & secrets from environment variables
key := os.Getenv("LIVEKIT_KEY")
secret := os.Getenv("LIVEKIT_SECRET")
// We initialize potential key & secret path from environment variables
keyPath := os.Getenv("LIVEKIT_KEY_FROM_FILE")
secretPath := os.Getenv("LIVEKIT_SECRET_FROM_FILE")
keySecretPath := os.Getenv("LIVEKIT_KEY_FILE")
// If keySecretPath is set we read the file and split it into two parts
// It takes over any other initialization
if keySecretPath != "" {
if keySecretBytes, err := os.ReadFile(keySecretPath); err != nil {
log.Fatal(err)
} else {
keySecrets := strings.Split(string(keySecretBytes), ":")
if len(keySecrets) != 2 {
log.Fatalf("invalid key secret file format!")
}
log.Printf("Using LiveKit API key and API secret from LIVEKIT_KEY_FILE")
key = keySecrets[0]
secret = keySecrets[1]
}
} else {
// If keySecretPath is not set, we try to read the key and secret from files
// If those files are not set, we return the key & secret from the environment variables
if keyPath != "" {
if keyBytes, err := os.ReadFile(keyPath); err != nil {
log.Fatal(err)
} else {
log.Printf("Using LiveKit API key from LIVEKIT_KEY_FROM_FILE")
key = string(keyBytes)
}
}
if secretPath != "" {
if secretBytes, err := os.ReadFile(secretPath); err != nil {
log.Fatal(err)
} else {
log.Printf("Using LiveKit API secret from LIVEKIT_SECRET_FROM_FILE")
secret = string(secretBytes)
}
}
}
// remove white spaces, new lines and carriage returns
// from key and secret
return strings.Trim(key, " \r\n"), strings.Trim(secret, " \r\n")
}
func parseConfig() (*Config, error) {
skipVerifyTLS := os.Getenv("LIVEKIT_INSECURE_SKIP_VERIFY_TLS") == "YES_I_KNOW_WHAT_I_AM_DOING"
if skipVerifyTLS {
log.Printf("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
log.Printf("!!! WARNING !!! LIVEKIT_INSECURE_SKIP_VERIFY_TLS !!! WARNING !!!")
log.Printf("!!! WARNING !!! Allow to skip invalid TLS certificates !!! WARNING !!!")
log.Printf("!!! WARNING !!! Use only for testing or debugging !!! WARNING !!!")
log.Println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
}
key, secret := readKeySecret()
lkUrl := os.Getenv("LIVEKIT_URL")
if key == "" || secret == "" || lkUrl == "" {
return nil, fmt.Errorf("LIVEKIT_KEY[_FILE], LIVEKIT_SECRET[_FILE] and LIVEKIT_URL environment variables must be set")
}
fullAccessHomeservers := os.Getenv("LIVEKIT_FULL_ACCESS_HOMESERVERS")
if len(fullAccessHomeservers) == 0 {
localHomeservers := os.Getenv("LIVEKIT_LOCAL_HOMESERVERS")
if len(localHomeservers) > 0 {
log.Printf("!!! LIVEKIT_LOCAL_HOMESERVERS is deprecated, please use LIVEKIT_FULL_ACCESS_HOMESERVERS instead !!!")
fullAccessHomeservers = localHomeservers
} else {
log.Printf("LIVEKIT_FULL_ACCESS_HOMESERVERS not set, defaulting to wildcard (*) for full access")
fullAccessHomeservers = "*"
}
}
lkJwtBind := os.Getenv("LIVEKIT_JWT_BIND")
lkJwtPort := os.Getenv("LIVEKIT_JWT_PORT")
if lkJwtBind == "" {
if lkJwtPort == "" {
lkJwtPort = "8080"
} else {
log.Printf("!!! LIVEKIT_JWT_PORT is deprecated, please use LIVEKIT_JWT_BIND instead !!!")
}
lkJwtBind = fmt.Sprintf(":%s", lkJwtPort)
} else if lkJwtPort != "" {
return nil, fmt.Errorf("LIVEKIT_JWT_BIND and LIVEKIT_JWT_PORT environment variables MUST NOT be set together")
}
return &Config{
Key: key,
Secret: secret,
LkUrl: lkUrl,
SkipVerifyTLS: skipVerifyTLS,
FullAccessHomeservers: strings.Fields(strings.ReplaceAll(fullAccessHomeservers, ",", " ")),
LkJwtBind: lkJwtBind,
}, nil
}
func main() {
config, err := parseConfig()
if err != nil {
log.Fatal(err)
}
log.Printf("LIVEKIT_URL: %s, LIVEKIT_JWT_BIND: %s", config.LkUrl, config.LkJwtBind)
log.Printf("LIVEKIT_FULL_ACCESS_HOMESERVERS: %v", config.FullAccessHomeservers)
handler := &Handler{
key: config.Key,
secret: config.Secret,
lkUrl: config.LkUrl,
skipVerifyTLS: config.SkipVerifyTLS,
fullAccessHomeservers: config.FullAccessHomeservers,
}
log.Fatal(http.ListenAndServe(config.LkJwtBind, handler.prepareMux()))
}

1083
lk-jwt-service/main_test.go Normal file
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25
lk-jwt-service/renovate.json Normal file
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@ -0,0 +1,25 @@
{
"$schema": "https://docs.renovatebot.com/renovate-schema.json",
"extends": [
"config:recommended",
"schedule:monthly",
"helpers:pinGitHubActionDigestsToSemver",
":enableVulnerabilityAlertsWithLabel(security)"
],
"addLabels": ["dependencies"],
"vulnerabilityAlerts": {
"schedule": [
"at any time"
],
"prHourlyLimit": 0,
"minimumReleaseAge": null
},
"packageRules": [
{
"groupName": "GitHub Actions",
"matchDepTypes": ["action"],
"pinDigests": true
}
],
"minimumReleaseAge": "5 days"
}

1
lk-jwt-service/tests/key Normal file
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@ -0,0 +1 @@
from_file_oquusheiheiw4Iegah8te3Vienguus5a

1
lk-jwt-service/tests/keysecret.yaml Normal file
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@ -0,0 +1 @@
keysecret_iethuB2LeLiNuishiaKeephei9jaatio: keysecret_xefaingo4oos6ohla9phiMieBu3ohJi2

1
lk-jwt-service/tests/secret Normal file
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@ -0,0 +1 @@
from_file_vohmahH3eeyieghohSh3kee8feuPhaim