Add invite links with role based access control

package-lock.json

@@ -2948,6 +2948,14 @@
         }
       }
     },
+    "base-x": {
+      "version": "3.0.8",
+      "resolved": "https://registry.npmjs.org/base-x/-/base-x-3.0.8.tgz",
+      "integrity": "sha512-Rl/1AWP4J/zRrk54hhlxH4drNxPJXYUaKffODVI53/dAsV4t9fBxyxYKAVPU1XBHxYwOWP9h9H0hM2MVw4YfJA==",
+      "requires": {
+        "safe-buffer": "^5.0.1"
+      }
+    },
     "base64-js": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.1.tgz",

package.json

@@ -14,6 +14,7 @@
   "dependencies": {
     "@iarna/toml": "^2.2.5",
     "@repeaterjs/repeater": "^3.0.1",
+    "base-x": "^3.0.8",
     "chokidar": "^3.4.0",
     "color": "^3.1.2",
     "dank-twitch-irc": "^3.3.0",

src/node/auth.js

@@ -0,0 +1,144 @@
+import EventEmitter from 'events'
+import { randomBytes, scrypt as scryptCb } from 'crypto'
+import { promisify } from 'util'
+
+import { validRoles } from '../roles'
+
+const scrypt = promisify(scryptCb)
+
+const base62 = require('base-x')(
+  '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
+)
+
+function rand62(len) {
+  return base62.encode(randomBytes(len))
+}
+
+async function hashToken62(token, salt) {
+  const hashBuffer = await scrypt(token, salt, 24)
+  return base62.encode(hashBuffer)
+}
+
+// Wrapper for state data to facilitate role-scoped data access.
+export class StateWrapper {
+  constructor(value) {
+    this._value = value
+  }
+
+  toJSON() {
+    return '<state data>'
+  }
+
+  view(role) {
+    const {
+      config,
+      auth,
+      streams,
+      customStreams,
+      views,
+      streamdelay,
+    } = this._value
+
+    const state = {
+      config,
+      streams,
+      customStreams,
+      views,
+      streamdelay,
+    }
+    if (role === 'admin') {
+      state.auth = auth
+    }
+
+    return state
+  }
+
+  update(value) {
+    this._value = { ...this._value, ...value }
+  }
+
+  // Unprivileged getter
+  get info() {
+    return this.view()
+  }
+}
+
+export class Auth extends EventEmitter {
+  constructor({ adminUsername, adminPassword }) {
+    super()
+    this.adminUsername = adminUsername
+    this.adminPassword = adminPassword
+    this.salt = rand62(16)
+    this.tokensById = new Map()
+    this.tokensByHash = new Map()
+  }
+
+  getState() {
+    const toTokenInfo = ({ id, name, role }) => ({ id, name, role })
+    return {
+      invites: [...this.tokensById.values()]
+        .filter((t) => t.kind === 'invite')
+        .map(toTokenInfo),
+      sessions: [...this.tokensById.values()]
+        .filter((t) => t.kind === 'session')
+        .map(toTokenInfo),
+    }
+  }
+
+  emitState() {
+    this.emit('state', this.getState())
+  }
+
+  admin() {
+    return { id: 'admin', kind: 'admin', name: 'admin', role: 'admin' }
+  }
+
+  async validateToken(secret) {
+    const tokenHash = await hashToken62(secret, this.salt)
+    const tokenData = this.tokensByHash.get(tokenHash)
+    if (!tokenData) {
+      return null
+    }
+    return {
+      id: tokenData.id,
+      kind: tokenData.kind,
+      role: tokenData.role,
+      name: tokenData.name,
+    }
+  }
+
+  async createToken({ kind, role, name }) {
+    if (!validRoles.has(role)) {
+      throw new Error(`invalid role: ${role}`)
+    }
+    let id = rand62(8)
+    // Regenerate in case of an id collision
+    while (this.tokensById.has(id)) {
+      id = rand62(8)
+    }
+    const secret = rand62(24)
+    const tokenHash = await hashToken62(secret, this.salt)
+    const tokenData = {
+      id,
+      tokenHash,
+      kind,
+      role,
+      name,
+    }
+    this.tokensById.set(id, tokenData)
+    this.tokensByHash.set(tokenHash, tokenData)
+    this.emitState()
+    console.log(`Created ${kind} token:`, { id, role, name })
+    return secret
+  }
+
+  deleteToken(tokenId) {
+    const tokenData = this.tokensById.get(tokenId)
+    if (!tokenData) {
+      return
+    }
+    this.tokensById.delete(tokenData.id)
+    this.tokensByHash.delete(tokenData.tokenHash)
+    this.emitState()
+  }
+}

src/node/index.js

@@ -2,7 +2,6 @@ import fs from 'fs'
 import yargs from 'yargs'
 import TOML from '@iarna/toml'
 import * as Y from 'yjs'
-import { create as createJSONDiffPatch } from 'jsondiffpatch'
 import { Repeater } from '@repeaterjs/repeater'
 import { app, shell, session, BrowserWindow } from 'electron'
 
@@ -14,6 +13,7 @@ import {
   markDataSource,
   combineDataSources,
 } from './data'
+import { Auth, StateWrapper } from './auth'
 import StreamWindow from './StreamWindow'
 import TwitchBot from './TwitchBot'
 import StreamdelayClient from './StreamdelayClient'
@@ -213,21 +213,27 @@ async function main() {
   })
   streamWindow.init()
 
+  const auth = new Auth({
+    adminUsername: argv.control.username,
+    adminPassword: argv.control.password,
+  })
+
   let browseWindow = null
   let twitchBot = null
   let streamdelayClient = null
 
-  let clientState = {
+  let clientState = new StateWrapper({
     config: {
       width: argv.window.width,
       height: argv.window.height,
       gridCount: argv.grid.count,
     },
+    auth: auth.getState(),
     streams: [],
     customStreams: [],
     views: [],
     streamdelay: null,
-  }
+  })
 
   const stateDoc = new Y.Doc()
   const viewsState = stateDoc.getMap('views')
@@ -241,7 +247,7 @@ async function main() {
   viewsState.observeDeep(() => {
     const viewContentMap = new Map()
     for (const [key, viewData] of viewsState) {
-      const stream = clientState.streams.find(
+      const stream = clientState.info.streams.find(
         (s) => s._id === viewData.get('streamId'),
       )
       if (!stream) {
@@ -257,7 +263,7 @@ async function main() {
 
   const getInitialState = () => clientState
   let broadcast = () => {}
-  const onMessage = (msg) => {
+  const onMessage = async (msg, respond) => {
     if (msg.type === 'set-listening-view') {
       streamWindow.setListeningView(msg.viewIdx)
     } else if (msg.type === 'set-view-blurred') {
@@ -294,26 +300,27 @@ async function main() {
       }
     } else if (msg.type === 'set-stream-censored' && streamdelayClient) {
       streamdelayClient.setCensored(msg.isCensored)
+    } else if (msg.type === 'create-invite') {
+      const secret = await auth.createToken({
+        kind: 'invite',
+        role: msg.role,
+        name: msg.name,
+      })
+      respond({ name: msg.name, secret })
+    } else if (msg.type === 'delete-token') {
+      auth.deleteToken(msg.tokenId)
     }
   }
 
-  const stateDiff = createJSONDiffPatch({
-    objectHash: (obj, idx) => obj._id || `$$index:${idx}`,
-  })
   function updateState(newState) {
-    const lastClientState = clientState
-    clientState = { ...clientState, ...newState }
-    const delta = stateDiff.diff(lastClientState, clientState)
-    if (!delta) {
-      return
-    }
+    clientState.update(newState)
     broadcast({
-      type: 'state-delta',
-      delta,
+      type: 'state',
+      state: clientState,
     })
-    streamWindow.send('state', clientState)
+    streamWindow.send('state', clientState.info)
     if (twitchBot) {
-      twitchBot.onState(clientState)
+      twitchBot.onState(clientState.info)
     }
   }
 
@@ -325,8 +332,7 @@ async function main() {
       url: argv.control.address,
       hostname: argv.control.hostname,
       port: argv.control.port,
-      username: argv.control.username,
-      password: argv.control.password,
+      auth,
       getInitialState,
       onMessage,
       stateDoc,
@@ -360,6 +366,10 @@ async function main() {
     process.exit(0)
   })
 
+  auth.on('state', (authState) => {
+    updateState({ auth: authState })
+  })
+
   const dataSources = [
     ...argv.data['json-url'].map((url) =>
       markDataSource(pollDataURL(url, argv.data.interval), 'json-url'),

src/node/server.js

@@ -6,23 +6,26 @@ import http from 'http'
 import https from 'https'
 import simpleCert from 'node-simple-cert'
 import Koa from 'koa'
-import auth from 'koa-basic-auth'
+import basicAuth from 'koa-basic-auth'
 import route from 'koa-route'
 import serveStatic from 'koa-static'
 import views from 'koa-views'
 import websocket from 'koa-easy-ws'
+import WebSocket from 'ws'
 import * as Y from 'yjs'
+import { create as createJSONDiffPatch } from 'jsondiffpatch'
+
+import { roleCan } from '../roles'
+
+const SESSION_COOKIE_NAME = 's'
 
 const webDistPath = path.join(app.getAppPath(), 'web')
 
-function initApp({
-  username,
-  password,
-  baseURL,
-  getInitialState,
-  onMessage,
-  stateDoc,
-}) {
+const stateDiff = createJSONDiffPatch({
+  objectHash: (obj, idx) => obj._id || `$$index:${idx}`,
+})
+
+function initApp({ auth, baseURL, getInitialState, onMessage, stateDoc }) {
   const expectedOrigin = new URL(baseURL).origin
   const sockets = new Set()
 
@@ -31,15 +34,59 @@ function initApp({
   // silence koa printing errors when websockets close early
   app.silent = true
 
-  app.use(auth({ name: username, pass: password }))
   app.use(views(webDistPath, { extension: 'ejs' }))
   app.use(serveStatic(webDistPath))
   app.use(websocket())
 
+  app.use(
+    route.get('/invite/:token', async (ctx, token) => {
+      const tokenInfo = await auth.validateToken(token)
+      if (!tokenInfo || tokenInfo.kind !== 'invite') {
+        return ctx.throw(403)
+      }
+      const sessionToken = await auth.createToken({
+        kind: 'session',
+        name: tokenInfo.name,
+        role: tokenInfo.role,
+      })
+      ctx.cookies.set(SESSION_COOKIE_NAME, sessionToken, {
+        maxAge: 1 * 365 * 24 * 60 * 60 * 1000,
+        overwrite: true,
+      })
+      await auth.deleteToken(tokenInfo.id)
+      ctx.redirect('/')
+    }),
+  )
+
+  const basicAuthMiddleware = basicAuth({
+    name: auth.adminUsername,
+    pass: auth.adminPassword,
+  })
+  app.use(async (ctx, next) => {
+    const sessionCookie = ctx.cookies.get(SESSION_COOKIE_NAME)
+    if (sessionCookie) {
+      const tokenInfo = await auth.validateToken(sessionCookie)
+      if (tokenInfo && tokenInfo.kind === 'session') {
+        ctx.state.identity = tokenInfo
+        await next()
+        return
+      }
+      ctx.cookies.set(SESSION_COOKIE_NAME, '', {
+        maxAge: 0,
+        overwrite: true,
+      })
+    }
+    await basicAuthMiddleware(ctx, async () => {
+      ctx.state.identity = auth.admin()
+      await next()
+    })
+  })
+
   app.use(
     route.get('/', async (ctx) => {
       await ctx.render('control', {
         wsEndpoint: url.resolve(baseURL, 'ws').replace(/^http/, 'ws'),
+        role: ctx.state.identity.role,
       })
     }),
   )
@@ -52,8 +99,14 @@ function initApp({
           return
         }
 
+        const { identity } = ctx.state
+
         const ws = await ctx.ws()
-        sockets.add(ws)
+        sockets.add({
+          ws,
+          lastState: null,
+          identity,
+        })
 
         ws.binaryType = 'arraybuffer'
 
@@ -68,26 +121,50 @@ function initApp({
 
         ws.on('message', (rawData) => {
           if (rawData instanceof ArrayBuffer) {
+            if (!roleCan(identity.role, 'mutate-state-doc')) {
+              console.warn(
+                `Unauthorized attempt to edit state doc by "${identity.name}"`,
+              )
+              return
+            }
             Y.applyUpdate(stateDoc, new Uint8Array(rawData))
             return
           }
 
-          let data
+          let msg
           try {
-            data = JSON.parse(rawData)
+            msg = JSON.parse(rawData)
           } catch (err) {
             console.warn('received unexpected ws data:', rawData)
             return
           }
 
           try {
-            onMessage(data)
+            if (!roleCan(identity.role, msg.type)) {
+              console.warn(
+                `Unauthorized attempt to "${msg.type}" by "${identity.name}"`,
+              )
+              return
+            }
+            const respond = (responseData) => {
+              if (ws.readyState !== WebSocket.OPEN) {
+                return
+              }
+              ws.send(
+                JSON.stringify({
+                  ...responseData,
+                  response: true,
+                  id: msg.id,
+                }),
+              )
+            }
+            onMessage(msg, respond)
           } catch (err) {
             console.error('failed to handle ws message:', data, err)
           }
         })
 
-        const state = getInitialState()
+        const state = getInitialState().view(identity.role)
         ws.send(JSON.stringify({ type: 'state', state }))
         ws.send(Y.encodeStateAsUpdate(stateDoc))
         return
@@ -96,15 +173,43 @@ function initApp({
     }),
   )
 
-  const broadcast = (data) => {
-    for (const ws of sockets) {
-      ws.send(JSON.stringify(data))
+  const broadcast = (origMsg) => {
+    if (origMsg.type !== 'state') {
+      console.warn(`Unexpected ws broadcast type: ${origMsg.type}`)
+      return
+    }
+    for (const client of sockets) {
+      if (client.ws.readyState !== WebSocket.OPEN) {
+        continue
+      }
+      const state = origMsg.state.view(client.identity.role)
+      const delta = stateDiff.diff(client.lastState, state)
+      client.lastState = state
+      if (!delta) {
+        continue
+      }
+      client.ws.send(JSON.stringify({ type: 'state-delta', delta }))
     }
   }
 
   stateDoc.on('update', (update) => {
-    for (const ws of sockets) {
-      ws.send(update)
+    for (const client of sockets) {
+      if (client.ws.readyState !== WebSocket.OPEN) {
+        continue
+      }
+      client.ws.send(update)
+    }
+  })
+
+  auth.on('state', (state) => {
+    const tokenIds = new Set(state.sessions.map((t) => t.id))
+    for (const client of sockets) {
+      if (client.identity.role === 'admin') {
+        continue
+      }
+      if (!tokenIds.has(client.identity.id)) {
+        client.ws.close()
+      }
     }
   })
 
@@ -118,8 +223,7 @@ export default async function initWebServer({
   url: baseURL,
   hostname: overrideHostname,
   port: overridePort,
-  username,
-  password,
+  auth,
   getInitialState,
   onMessage,
   stateDoc,
@@ -133,8 +237,7 @@ export default async function initWebServer({
   }
 
   const { app, broadcast } = initApp({
-    username,
-    password,
+    auth,
     baseURL,
     getInitialState,
     onMessage,

src/roles.js

@@ -0,0 +1,28 @@
+const operatorActions = new Set([
+  'set-listening-view',
+  'set-view-blurred',
+  'set-custom-streams',
+  'reload-view',
+  'set-stream-censored',
+  'mutate-state-doc',
+])
+
+const monitorActions = new Set(['set-view-blurred', 'set-stream-censored'])
+
+export const validRoles = new Set(['admin', 'operator', 'monitor'])
+
+export function roleCan(role, action) {
+  if (role === 'admin') {
+    return true
+  }
+
+  if (role === 'operator' && operatorActions.has(action)) {
+    return true
+  }
+
+  if (role === 'monitor' && monitorActions.has(action)) {
+    return true
+  }
+
+  return false
+}

src/web/control.ejs

@@ -14,6 +14,7 @@
       type="module"
       id="main-script"
       data-ws-endpoint="<%= wsEndpoint %>"
+      data-role="<%= role %>"
       crossorigin
     ></script>
   </body>

src/web/control.js

@@ -18,6 +18,7 @@ import { useHotkeys } from 'react-hotkeys-hook'
 
 import '../index.css'
 import { idxInBox } from '../geometry'
+import { roleCan } from '../roles'
 import SoundIcon from '../static/volume-up-solid.svg'
 import NoVideoIcon from '../static/video-slash-solid.svg'
 import ReloadIcon from '../static/redo-alt-solid.svg'
@@ -88,6 +89,7 @@ function useStreamwallConnection(wsEndpoint) {
   const [customStreams, setCustomStreams] = useState([])
   const [stateIdxMap, setStateIdxMap] = useState(new Map())
   const [delayState, setDelayState] = useState()
+  const [authState, setAuthState] = useState()
 
   useEffect(() => {
     let lastStateData
@@ -107,7 +109,14 @@ function useStreamwallConnection(wsEndpoint) {
         return
       }
       const msg = JSON.parse(ev.data)
-      if (msg.type === 'state' || msg.type === 'state-delta') {
+      if (msg.response) {
+        const { responseMap } = wsRef.current
+        const responseCb = responseMap.get(msg.id)
+        if (responseCb) {
+          responseMap.delete(msg.id)
+          responseCb(msg)
+        }
+      } else if (msg.type === 'state' || msg.type === 'state-delta') {
         let state
         if (msg.type === 'state') {
           state = msg.state
@@ -121,6 +130,7 @@ function useStreamwallConnection(wsEndpoint) {
           streams: newStreams,
           views,
           streamdelay,
+          auth,
         } = state
         const newStateIdxMap = new Map()
         for (const viewState of views) {
@@ -152,15 +162,26 @@ function useStreamwallConnection(wsEndpoint) {
             state: State.from(streamdelay.state),
           },
         )
+        setAuthState(auth)
       } else {
         console.warn('unexpected ws message', msg)
       }
     })
-    wsRef.current = ws
+    wsRef.current = { ws, msgId: 0, responseMap: new Map() }
   }, [])
 
-  const send = useCallback((...args) => {
-    wsRef.current.send(...args)
+  const send = useCallback((msg, cb) => {
+    const { ws, msgId, responseMap } = wsRef.current
+    ws.send(
+      JSON.stringify({
+        ...msg,
+        id: msgId,
+      }),
+    )
+    if (cb) {
+      responseMap.set(msgId, cb)
+    }
+    wsRef.current.msgId++
   }, [])
 
   useEffect(() => {
@@ -168,7 +189,7 @@ function useStreamwallConnection(wsEndpoint) {
       if (origin === 'server') {
         return
       }
-      wsRef.current.send(update)
+      wsRef.current.ws.send(update)
     }
     function receiveUpdate(ev) {
       if (!(ev.data instanceof ArrayBuffer)) {
@@ -177,10 +198,10 @@ function useStreamwallConnection(wsEndpoint) {
       Y.applyUpdate(stateDoc, new Uint8Array(ev.data), 'server')
     }
     stateDoc.on('update', sendUpdate)
-    wsRef.current.addEventListener('message', receiveUpdate)
+    wsRef.current.ws.addEventListener('message', receiveUpdate)
     return () => {
       stateDoc.off('update', sendUpdate)
-      wsRef.current.removeEventListener('message', receiveUpdate)
+      wsRef.current.ws.removeEventListener('message', receiveUpdate)
     }
   }, [stateDoc])
 
@@ -194,10 +215,11 @@ function useStreamwallConnection(wsEndpoint) {
     customStreams,
     stateIdxMap,
     delayState,
+    authState,
   }
 }
 
-function App({ wsEndpoint }) {
+function App({ wsEndpoint, role }) {
   const {
     isConnected,
     send,
@@ -208,6 +230,7 @@ function App({ wsEndpoint }) {
     customStreams,
     stateIdxMap,
     delayState,
+    authState,
   } = useStreamwallConnection(wsEndpoint)
   const { gridCount } = config
 
@@ -303,31 +326,25 @@ function App({ wsEndpoint }) {
   )
 
   const handleSetListening = useCallback((idx, listening) => {
-    send(
-      JSON.stringify({
-        type: 'set-listening-view',
-        viewIdx: listening ? idx : null,
-      }),
-    )
+    send({
+      type: 'set-listening-view',
+      viewIdx: listening ? idx : null,
+    })
   }, [])
 
   const handleSetBlurred = useCallback((idx, blurred) => {
-    send(
-      JSON.stringify({
-        type: 'set-view-blurred',
-        viewIdx: idx,
-        blurred: blurred,
-      }),
-    )
+    send({
+      type: 'set-view-blurred',
+      viewIdx: idx,
+      blurred: blurred,
+    })
   }, [])
 
   const handleReloadView = useCallback((idx) => {
-    send(
-      JSON.stringify({
-        type: 'reload-view',
-        viewIdx: idx,
-      }),
-    )
+    send({
+      type: 'reload-view',
+      viewIdx: idx,
+    })
   }, [])
 
   const handleBrowse = useCallback(
@@ -336,23 +353,19 @@ function App({ wsEndpoint }) {
       if (!stream) {
         return
       }
-      send(
-        JSON.stringify({
-          type: 'browse',
-          url: stream.link,
-        }),
-      )
+      send({
+        type: 'browse',
+        url: stream.link,
+      })
     },
     [streams],
   )
 
   const handleDevTools = useCallback((idx) => {
-    send(
-      JSON.stringify({
-        type: 'dev-tools',
-        viewIdx: idx,
-      }),
-    )
+    send({
+      type: 'dev-tools',
+      viewIdx: idx,
+    })
   }, [])
 
   const handleClickId = useCallback(
@@ -383,23 +396,45 @@ function App({ wsEndpoint }) {
     let newCustomStreams = [...customStreams]
     newCustomStreams[idx] = customStream
     newCustomStreams = newCustomStreams.filter((s) => s.label || s.link)
-    send(
-      JSON.stringify({
-        type: 'set-custom-streams',
-        streams: newCustomStreams,
-      }),
-    )
+    send({
+      type: 'set-custom-streams',
+      streams: newCustomStreams,
+    })
   })
 
   const setStreamCensored = useCallback((isCensored) => {
+    send({
+      type: 'set-stream-censored',
+      isCensored,
+    })
+  }, [])
+
+  const [newInvite, setNewInvite] = useState()
+
+  const handleCreateInvite = useCallback(({ name, role }) => {
     send(
-      JSON.stringify({
-        type: 'set-stream-censored',
-        isCensored,
-      }),
+      {
+        type: 'create-invite',
+        name,
+        role,
+      },
+      ({ name, secret }) => {
+        setNewInvite({ name, secret })
+      },
     )
   }, [])
 
+  const handleDeleteToken = useCallback((tokenId) => {
+    send({
+      type: 'delete-token',
+      tokenId,
+    })
+  }, [])
+
+  const preventLinkClick = useCallback((ev) => {
+    ev.preventDefault()
+  })
+
   // Set up keyboard shortcuts.
   useHotkeys(
     hotkeyTriggers.map((k) => `alt+${k}`).join(','),
@@ -456,6 +491,7 @@ function App({ wsEndpoint }) {
         <div>
           connection status: {isConnected ? 'connected' : 'connecting...'}
         </div>
+        <div>role: {role}</div>
         {delayState && (
           <StreamDelayBox
             delayState={delayState}
@@ -485,6 +521,7 @@ function App({ wsEndpoint }) {
                       isHighlighted={isDragHighlighted}
                       isSwapping={idx === swapStartIdx}
                       showDebug={showDebug}
+                      role={role}
                       onMouseDown={handleDragStart}
                       onMouseEnter={setDragEnd}
                       onFocus={handleFocusInput}
@@ -502,14 +539,16 @@ function App({ wsEndpoint }) {
               </StyledGridLine>
             ))}
           </div>
-          <label>
-            <input
-              type="checkbox"
-              value={showDebug}
-              onChange={handleChangeShowDebug}
-            />
-            Show stream debug tools
-          </label>
+          {(roleCan(role, 'dev-tools') || roleCan(role, 'browse')) && (
+            <label>
+              <input
+                type="checkbox"
+                value={showDebug}
+                onChange={handleChangeShowDebug}
+              />
+              Show stream debug tools
+            </label>
+          )}
         </StyledDataContainer>
       </Stack>
       <Stack flex="1" scroll={true}>
@@ -520,30 +559,72 @@ function App({ wsEndpoint }) {
                   <StreamLine
                     id={row._id}
                     row={row}
+                    disabled={!roleCan(role, 'mutate-state-doc')}
                     onClickId={handleClickId}
                   />
                 ))
               : 'loading...'}
           </div>
-          <h2>Custom Streams</h2>
-          <div>
-            {/*
+          {roleCan(role, 'set-custom-streams') && (
+            <>
+              <h2>Custom Streams</h2>
+              <div>
+                {/*
             Include an empty object at the end to create an extra input for a new custom stream.
             We need it to be part of the array (rather than JSX below) for DOM diffing to match the key and retain focus.
            */}
-            {[...customStreams, { link: '', label: '', kind: 'video' }].map(
-              ({ link, label, kind }, idx) => (
-                <CustomStreamInput
-                  key={idx}
-                  idx={idx}
-                  link={link}
-                  label={label}
-                  kind={kind}
-                  onChange={handleChangeCustomStream}
-                />
-              ),
-            )}
-          </div>
+                {[...customStreams, { link: '', label: '', kind: 'video' }].map(
+                  ({ link, label, kind }, idx) => (
+                    <CustomStreamInput
+                      key={idx}
+                      idx={idx}
+                      link={link}
+                      label={label}
+                      kind={kind}
+                      onChange={handleChangeCustomStream}
+                    />
+                  ),
+                )}
+              </div>
+            </>
+          )}
+          {roleCan(role, 'edit-tokens') && authState && (
+            <>
+              <h2>Access</h2>
+              <div>
+                <CreateInviteInput onCreateInvite={handleCreateInvite} />
+                <h3>Invites</h3>
+                {newInvite && (
+                  <StyledNewInviteBox>
+                    Invite link created:{' '}
+                    <a
+                      href={`/invite/${newInvite.secret}`}
+                      onClick={preventLinkClick}
+                    >
+                      "{newInvite.name}"
+                    </a>
+                  </StyledNewInviteBox>
+                )}
+                {authState.invites.map(({ id, name, role }) => (
+                  <AuthTokenLine
+                    id={id}
+                    name={name}
+                    role={role}
+                    onDelete={handleDeleteToken}
+                  />
+                ))}
+                <h3>Sessions</h3>
+                {authState.sessions.map(({ id, name, role }) => (
+                  <AuthTokenLine
+                    id={id}
+                    name={name}
+                    role={role}
+                    onDelete={handleDeleteToken}
+                  />
+                ))}
+              </div>
+            </>
+          )}
         </StyledDataContainer>
       </Stack>
     </Stack>
@@ -596,6 +677,7 @@ function StreamDelayBox({ delayState, setStreamCensored }) {
 function StreamLine({
   id,
   row: { label, source, title, link, notes, state, city },
+  disabled,
   onClickId,
 }) {
   // Use mousedown instead of click event so a potential destination grid input stays focused.
@@ -608,7 +690,11 @@ function StreamLine({
   }
   return (
     <StyledStreamLine>
-      <StyledId onMouseDown={handleMouseDownId} color={idColor(id)}>
+      <StyledId
+        disabled={disabled}
+        onMouseDown={disabled ? null : handleMouseDownId}
+        color={idColor(id)}
+      >
         {id}
       </StyledId>
       <div>
@@ -640,6 +726,7 @@ function GridInput({
   isHighlighted,
   isSwapping,
   showDebug,
+  role,
   onMouseDown,
   onMouseEnter,
   onFocus,
@@ -709,50 +796,63 @@ function GridInput({
         <StyledGridButtons side="left">
           {showDebug ? (
             <>
-              <StyledSmallButton onClick={handleBrowseClick} tabIndex={1}>
-                <WindowIcon />
-              </StyledSmallButton>
-              <StyledSmallButton onClick={handleDevToolsClick} tabIndex={1}>
-                <LifeRingIcon />
-              </StyledSmallButton>
+              {roleCan(role, 'browse') && (
+                <StyledSmallButton onClick={handleBrowseClick} tabIndex={1}>
+                  <WindowIcon />
+                </StyledSmallButton>
+              )}
+              {roleCan(role, 'dev-tools') && (
+                <StyledSmallButton onClick={handleDevToolsClick} tabIndex={1}>
+                  <LifeRingIcon />
+                </StyledSmallButton>
+              )}
             </>
           ) : (
             <>
-              <StyledSmallButton onClick={handleReloadClick} tabIndex={1}>
-                <ReloadIcon />
-              </StyledSmallButton>
-              <StyledSmallButton
-                isActive={isSwapping}
-                onClick={handleSwapClick}
-                tabIndex={1}
-              >
-                <SwapIcon />
-              </StyledSmallButton>
+              {roleCan(role, 'reload-view') && (
+                <StyledSmallButton onClick={handleReloadClick} tabIndex={1}>
+                  <ReloadIcon />
+                </StyledSmallButton>
+              )}
+              {roleCan(role, 'mutate-state-doc') && (
+                <StyledSmallButton
+                  isActive={isSwapping}
+                  onClick={handleSwapClick}
+                  tabIndex={1}
+                >
+                  <SwapIcon />
+                </StyledSmallButton>
+              )}
             </>
           )}
         </StyledGridButtons>
       )}
       <StyledGridButtons side="right">
-        <StyledButton
-          isActive={isBlurred}
-          onClick={handleBlurClick}
-          tabIndex={1}
-        >
-          <NoVideoIcon />
-        </StyledButton>
-        <StyledButton
-          isActive={isListening}
-          onClick={handleListeningClick}
-          tabIndex={1}
-        >
-          <SoundIcon />
-        </StyledButton>
+        {roleCan(role, 'set-view-blurred') && (
+          <StyledButton
+            isActive={isBlurred}
+            onClick={handleBlurClick}
+            tabIndex={1}
+          >
+            <NoVideoIcon />
+          </StyledButton>
+        )}
+        {roleCan(role, 'set-listening-view') && (
+          <StyledButton
+            isActive={isListening}
+            onClick={handleListeningClick}
+            tabIndex={1}
+          >
+            <SoundIcon />
+          </StyledButton>
+        )}
       </StyledGridButtons>
       <StyledGridInput
         value={editingValue || spaceValue || ''}
         color={idColor(spaceValue)}
         isError={isError}
         isHighlighted={isHighlighted}
+        disabled={!roleCan(role, 'mutate-state-doc')}
         onFocus={handleFocus}
         onBlur={handleBlur}
         onMouseDown={handleMouseDown}
@@ -897,7 +997,7 @@ const StyledId = styled.div`
   border-radius: 5px;
   width: 3em;
   text-align: center;
-  cursor: pointer;
+  cursor: ${({ disabled }) => (disabled ? 'normal' : 'pointer')};
 `
 
 const StyledStreamLine = styled.div`
@@ -906,12 +1006,72 @@ const StyledStreamLine = styled.div`
   margin: 0.5em 0;
 `
 
+function CreateInviteInput({ onCreateInvite }) {
+  const [inviteName, setInviteName] = useState('')
+  const [inviteRole, setInviteRole] = useState('operator')
+  const handleChangeName = useCallback(
+    (ev) => {
+      setInviteName(ev.target.value)
+    },
+    [setInviteName],
+  )
+  const handleChangeRole = useCallback(
+    (ev) => {
+      setInviteRole(ev.target.value)
+    },
+    [setInviteRole],
+  )
+  const handleSubmit = useCallback(
+    (ev) => {
+      ev.preventDefault()
+      setInviteName('')
+      setInviteRole('operator')
+      onCreateInvite({ name: inviteName, role: inviteRole })
+    },
+    [onCreateInvite, inviteName, inviteRole],
+  )
+  return (
+    <div>
+      <form onSubmit={handleSubmit}>
+        <input
+          onChange={handleChangeName}
+          placeholder="Name"
+          value={inviteName}
+        />
+        <select onChange={handleChangeRole} value={inviteRole}>
+          <option value="operator">operator</option>
+          <option value="monitor">monitor</option>
+        </select>
+        <button type="submit">create invite</button>
+      </form>
+    </div>
+  )
+}
+
+const StyledNewInviteBox = styled.div`
+  display: inline-block;
+  padding: 10px;
+  background: #dfd;
+`
+
+function AuthTokenLine({ id, role, name, onDelete }) {
+  const handleDeleteClick = useCallback(() => {
+    onDelete(id)
+  }, [id])
+  return (
+    <div>
+      <strong>{name}</strong>: {role}{' '}
+      <button onClick={handleDeleteClick}>revoke</button>
+    </div>
+  )
+}
+
 function main() {
   const script = document.getElementById('main-script')
   render(
     <>
       <GlobalStyle />
-      <App wsEndpoint={script.dataset.wsEndpoint} />
+      <App wsEndpoint={script.dataset.wsEndpoint} role={script.dataset.role} />
     </>,
     document.body,
   )