Add Matrix register/login API and full Matrix API proxy

(ref #19, #15)

docker/example-config.yaml

@@ -35,6 +35,14 @@ server:
     # Set to "generate" to generate and save a new token at startup.
     unshared_secret: generate
 
+# Shared registration secrets to allow registering new users from the management UI
+registration_secrets:
+    example.com:
+        # Client-server API URL
+        url: https://example.com
+        # registration_shared_secret from synapse config
+        secret: synapse_shared_registration_secret
+
 # List of administrator users. Plaintext passwords will be bcrypted on startup. Set empty password
 # to prevent normal login. Root is a special user that can't have a password and will always exist.
 admins:

example-config.yaml

@@ -35,6 +35,14 @@ server:
     # Set to "generate" to generate and save a new token at startup.
     unshared_secret: generate
 
+# Shared registration secrets to allow registering new users from the management UI
+registration_secrets:
+    example.com:
+        # Client-server API URL
+        url: https://example.com
+        # registration_shared_secret from synapse config
+        secret: synapse_shared_registration_secret
+
 # List of administrator users. Plaintext passwords will be bcrypted on startup. Set empty password
 # to prevent normal login. Root is a special user that can't have a password and will always exist.
 admins:

maubot/config.py

@@ -47,6 +47,7 @@ class Config(BaseFileConfig):
             base["server.unshared_secret"] = self._new_token()
         else:
             base["server.unshared_secret"] = shared_secret
+        copy("registration_secrets")
         copy("admins")
         for username, password in base["admins"].items():
             if password and not bcrypt_regex.match(password):

maubot/management/api/__init__.py

@@ -23,6 +23,8 @@ from .auth import web as _
 from .plugin import web as _
 from .instance import web as _
 from .client import web as _
+from .client_proxy import web as _
+from .client_auth import web as _
 from .dev_open import web as _
 from .log import stop_all as stop_log_sockets, init as init_log_listener
 

maubot/management/api/client.py

@@ -15,7 +15,6 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 from typing import Optional
 from json import JSONDecodeError
-from http import HTTPStatus
 
 from aiohttp import web
 
@@ -131,27 +130,3 @@ async def delete_client(request: web.Request) -> web.Response:
         await client.stop()
     client.delete()
     return resp.deleted
-
-
-@routes.post("/client/{id}/avatar")
-async def upload_avatar(request: web.Request) -> web.Response:
-    user_id = request.match_info.get("id", None)
-    client = Client.get(user_id, None)
-    if not client:
-        return resp.client_not_found
-    content = await request.read()
-    return web.json_response({
-        "content_uri": await client.client.upload_media(
-            content, request.headers.get("Content-Type", None)),
-    })
-
-
-@routes.get("/client/{id}/avatar")
-async def download_avatar(request: web.Request) -> web.Response:
-    user_id = request.match_info.get("id", None)
-    client = Client.get(user_id, None)
-    if not client:
-        return resp.client_not_found
-    if not client.avatar_url or client.avatar_url == "disable":
-        return web.Response()
-    return web.Response(body=await client.client.download_media(client.avatar_url))

maubot/management/api/client_auth.py

@@ -0,0 +1,121 @@
+# maubot - A plugin-based Matrix bot system.
+# Copyright (C) 2018 Tulir Asokan
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+from typing import Dict, Tuple, NamedTuple, Optional
+from json import JSONDecodeError
+import hmac
+import hashlib
+
+from aiohttp import web
+from mautrix.api import HTTPAPI, Path, Method
+from mautrix.errors import MatrixRequestError
+
+from .base import routes, get_config, get_loop
+from .responses import resp
+
+
+def registration_secrets() -> Dict[str, Dict[str, str]]:
+    return get_config()["registration_secrets"]
+
+
+def generate_mac(secret: str, nonce: str, user: str, password: str, admin: bool = False):
+    mac = hmac.new(key=secret.encode("utf-8"), digestmod=hashlib.sha1)
+    mac.update(nonce.encode("utf-8"))
+    mac.update(b"\x00")
+    mac.update(user.encode("utf-8"))
+    mac.update(b"\x00")
+    mac.update(password.encode("utf-8"))
+    mac.update(b"\x00")
+    mac.update(b"admin" if admin else b"notadmin")
+    return mac.hexdigest()
+
+
+@routes.get("/client/auth/servers")
+async def get_registerable_servers(_: web.Request) -> web.Response:
+    return web.json_response(list(registration_secrets().keys()))
+
+
+AuthRequestInfo = NamedTuple("AuthRequestInfo", api=HTTPAPI, secret=str, username=str, password=str)
+
+
+async def read_client_auth_request(request: web.Request) -> Tuple[Optional[AuthRequestInfo],
+                                                                  Optional[web.Response]]:
+    server_name = request.match_info.get("server", None)
+    server = registration_secrets().get(server_name, None)
+    if not server:
+        return None, resp.server_not_found
+    try:
+        body = await request.json()
+    except JSONDecodeError:
+        return None, resp.body_not_json
+    try:
+        username = body["username"]
+        password = body["password"]
+    except KeyError:
+        return None, resp.username_or_password_missing
+    try:
+        base_url = server["url"]
+        secret = server["secret"]
+    except KeyError:
+        return None, resp.invalid_server
+    api = HTTPAPI(base_url, "", loop=get_loop())
+    return (api, secret, username, password), None
+
+
+@routes.post("/client/auth/{server}/register")
+async def register(request: web.Request) -> web.Response:
+    info, err = await read_client_auth_request(request)
+    if err is not None:
+        return err
+    api, secret, username, password = info
+    res = await api.request(Method.GET, Path.admin.register)
+    nonce = res["nonce"]
+    mac = generate_mac(secret, nonce, username, password)
+    try:
+        return web.json_response(await api.request(Method.POST, Path.admin.register, content={
+            "nonce": nonce,
+            "username": username,
+            "password": password,
+            "admin": False,
+            "mac": mac,
+        }))
+    except MatrixRequestError as e:
+        return web.json_response({
+            "errcode": e.errcode,
+            "error": e.message,
+        }, status=e.http_status)
+
+
+@routes.post("/client/auth/{server}/login")
+async def login(request: web.Request) -> web.Response:
+    info, err = await read_client_auth_request(request)
+    if err is not None:
+        return err
+    api, _, username, password = info
+    try:
+        return web.json_response(await api.request(Method.POST, Path.login, content={
+            "type": "m.login.password",
+            "identifier": {
+                "type": "m.id.user",
+                "user": username,
+            },
+            "password": password,
+            "device_id": "maubot",
+        }))
+    except MatrixRequestError as e:
+        return web.json_response({
+            "errcode": e.errcode,
+            "error": e.message,
+        }, status=e.http_status)

maubot/management/api/client_proxy.py

@@ -0,0 +1,58 @@
+# maubot - A plugin-based Matrix bot system.
+# Copyright (C) 2018 Tulir Asokan
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+from aiohttp import web, client as http
+
+from ...client import Client
+from .base import routes
+from .responses import resp
+
+PROXY_CHUNK_SIZE = 32 * 1024
+
+
+@routes.view("/proxy/{id}/{path:_matrix/.+}")
+async def proxy(request: web.Request) -> web.StreamResponse:
+    user_id = request.match_info.get("id", None)
+    client = Client.get(user_id, None)
+    if not client:
+        return resp.client_not_found
+
+    path = request.match_info.get("path", None)
+    query = request.query.copy()
+    try:
+        del query["access_token"]
+    except KeyError:
+        pass
+    headers = request.headers.copy()
+    headers["Authorization"] = f"Bearer {client.access_token}"
+    if "X-Forwarded-For" not in headers:
+        peer = request.transport.get_extra_info("peername")
+        if peer is not None:
+            host, port = peer
+            headers["X-Forwarded-For"] = f"{host}:{port}"
+
+    data = await request.read()
+    chunked = PROXY_CHUNK_SIZE if not data else None
+    async with http.request(request.method, f"{client.homeserver}/{path}", headers=headers,
+                            params=query, chunked=chunked, data=data) as proxy_resp:
+        response = web.StreamResponse(status=proxy_resp.status, headers=proxy_resp.headers)
+        await response.prepare(request)
+        content = proxy_resp.content
+        chunk = await content.read(PROXY_CHUNK_SIZE)
+        while chunk:
+            await response.write(chunk)
+            chunk = await content.read(PROXY_CHUNK_SIZE)
+        await response.write_eof()
+        return response

maubot/management/api/middleware.py

@@ -20,15 +20,20 @@ from aiohttp import web
 
 from .responses import resp
 from .auth import check_token
+from .base import get_config
 
 Handler = Callable[[web.Request], Awaitable[web.Response]]
 
 
 @web.middleware
 async def auth(request: web.Request, handler: Handler) -> web.Response:
-    if "/auth/" in request.path:
+    subpath = request.path.lstrip(get_config()["server.base_path"])
+    if subpath.startswith("/auth/") or subpath == "/logs" or subpath == "logs":
         return await handler(request)
-    return check_token(request) or await handler(request)
+    err = check_token(request)
+    if err is not None:
+        return err
+    return await handler(request)
 
 
 log = logging.getLogger("maubot.server")

maubot/management/api/responses.py

@@ -75,6 +75,13 @@ class _Response:
             "errcode": "pid_mismatch",
         }, status=HTTPStatus.BAD_REQUEST)
 
+    @property
+    def username_or_password_missing(self) -> web.Response:
+        return web.json_response({
+            "error": "Username or password missing",
+            "errcode": "username_or_password_missing",
+        }, status=HTTPStatus.BAD_REQUEST)
+
     @property
     def bad_auth(self) -> web.Response:
         return web.json_response({
@@ -138,6 +145,13 @@ class _Response:
             "errcode": "resource_not_found",
         }, status=HTTPStatus.NOT_FOUND)
 
+    @property
+    def server_not_found(self) -> web.Response:
+        return web.json_response({
+            "error": "Registration target server not found",
+            "errcode": "server_not_found",
+        }, status=HTTPStatus.NOT_FOUND)
+
     @property
     def method_not_allowed(self) -> web.Response:
         return web.json_response({
@@ -196,6 +210,13 @@ class _Response:
             "errcode": "internal_server_error",
         }, status=HTTPStatus.INTERNAL_SERVER_ERROR)
 
+    @property
+    def invalid_server(self) -> web.Response:
+        return web.json_response({
+            "error": "Invalid registration server object in maubot configuration",
+            "errcode": "invalid_server",
+        }, status=HTTPStatus.INTERNAL_SERVER_ERROR)
+
     @property
     def unsupported_plugin_loader(self) -> web.Response:
         return web.json_response({

maubot/management/frontend/.eslintrc.json

@@ -34,9 +34,6 @@
     "semi": ["error", "never"],
     "comma-dangle": ["error", "always-multiline"],
     "max-len": ["warn", 100],
-    "camelcase": ["error", {
-      "properties": "always"
-    }],
     "space-before-function-paren": ["error", {
       "anonymous": "never",
       "named": "never",

maubot/management/frontend/src/api.js

@@ -138,6 +138,7 @@ export const updateDebugOpenFileEnabled = async () => {
     const resp = await defaultGet("/debug/open")
     _debugOpenFileEnabled = resp["enabled"] || false
 }
+
 export async function debugOpenFile(path, line) {
     const resp = await fetch(`${BASE_PATH}/debug/open`, {
         headers: getHeaders(),
@@ -178,7 +179,7 @@ export const getClients = () => defaultGet("/clients")
 export const getClient = id => defaultGet(`/clients/${id}`)
 
 export async function uploadAvatar(id, data, mime) {
-    const resp = await fetch(`${BASE_PATH}/client/${id}/avatar`, {
+    const resp = await fetch(`${BASE_PATH}/proxy/${id}/_matrix/media/r0/upload`, {
         headers: getHeaders(mime),
         body: data,
         method: "POST",
@@ -186,8 +187,13 @@ export async function uploadAvatar(id, data, mime) {
     return await resp.json()
 }
 
-export function getAvatarURL(id) {
-    return `${BASE_PATH}/client/${id}/avatar?access_token=${localStorage.accessToken}`
+export function getAvatarURL({ id, avatar_url }) {
+    avatar_url = avatar_url || ""
+    if (avatar_url.startsWith("mxc://")) {
+        avatar_url = avatar_url.substr("mxc://".length)
+    }
+    return `${BASE_PATH}/proxy/${id}/_matrix/media/r0/download/${avatar_url}?access_token=${
+        localStorage.accessToken}`
 }
 
 export const putClient = client => defaultPut("client", client)

maubot/management/frontend/src/pages/dashboard/Client.js

@@ -31,7 +31,7 @@ const ClientListEntry = ({ entry }) => {
     }
     return (
         <NavLink className={classes.join(" ")} to={`/client/${entry.id}`}>
-            <img className="avatar" src={api.getAvatarURL(entry.id)} alt=""/>
+            <img className="avatar" src={api.getAvatarURL(entry)} alt=""/>
             <span className="displayname">{entry.displayname || entry.id}</span>
             <ChevronRight/>
         </NavLink>
@@ -129,7 +129,7 @@ class Client extends BaseMainView {
         <div className="sidebar">
             <div className={`avatar-container ${this.state.avatar_url ? "" : "no-avatar"}
                         ${this.state.uploadingAvatar ? "uploading" : ""}`}>
-                <img className="avatar" src={api.getAvatarURL(this.state.id)} alt="Avatar"/>
+                <img className="avatar" src={api.getAvatarURL(this.state)} alt="Avatar"/>
                 <UploadButton className="upload"/>
                 <input className="file-selector" type="file" accept="image/png, image/jpeg"
                        onChange={this.avatarUpload} disabled={this.state.uploadingAvatar}

maubot/management/frontend/src/pages/dashboard/Instance.js

@@ -73,7 +73,7 @@ class Instance extends BaseMainView {
         value: client.id,
         label: (
             <div className="select-client">
-                <img className="avatar" src={api.getAvatarURL(client.id)} alt=""/>
+                <img className="avatar" src={api.getAvatarURL(client)} alt=""/>
                 <span className="displayname">{client.displayname || client.id}</span>
             </div>
         ),