feat(server): add authenticated remote access and desktop bootstrap

Adds cookie-based login with a bootstrap token flow for desktop apps, secures OpenCode instance traffic with per-instance Basic auth, and updates UI/plugin clients to use credentials.

packages/server/src/auth/auth-store.ts

@@ -0,0 +1,175 @@
+import fs from "fs"
+import path from "path"
+import type { Logger } from "../logger"
+import { hashPassword, type PasswordHashRecord, verifyPassword } from "./password-hash"
+
+export interface AuthFile {
+  version: 1
+  username: string
+  password: PasswordHashRecord
+  userProvided: boolean
+  updatedAt: string
+}
+
+export interface AuthStatus {
+  username: string
+  passwordUserProvided: boolean
+}
+
+export class AuthStore {
+  private cachedFile: AuthFile | null = null
+  private overrideAuth: AuthFile | null = null
+  private bootstrapUsername: string | null = null
+
+  constructor(private readonly authFilePath: string, private readonly logger: Logger) {}
+
+  getAuthFilePath() {
+    return this.authFilePath
+  }
+
+  load(): AuthFile | null {
+    if (this.overrideAuth) {
+      return this.overrideAuth
+    }
+
+    if (this.cachedFile) {
+      return this.cachedFile
+    }
+
+    try {
+      if (!fs.existsSync(this.authFilePath)) {
+        return null
+      }
+      const raw = fs.readFileSync(this.authFilePath, "utf-8")
+      const parsed = JSON.parse(raw) as AuthFile
+      if (!parsed || parsed.version !== 1) {
+        this.logger.warn({ authFilePath: this.authFilePath }, "Auth file has unsupported version")
+        return null
+      }
+      this.cachedFile = parsed
+      return parsed
+    } catch (error) {
+      this.logger.warn({ err: error, authFilePath: this.authFilePath }, "Failed to load auth file")
+      return null
+    }
+  }
+
+  ensureInitialized(params: {
+    username: string
+    password?: string
+    allowBootstrapWithoutPassword: boolean
+  }): void {
+    const password = params.password?.trim()
+    if (password) {
+      const now = new Date().toISOString()
+      const runtime: AuthFile = {
+        version: 1,
+        username: params.username,
+        password: hashPassword(password),
+        userProvided: true,
+        updatedAt: now,
+      }
+      this.overrideAuth = runtime
+      this.cachedFile = null
+      this.bootstrapUsername = null
+      this.logger.debug({ authFilePath: this.authFilePath }, "Using runtime auth password override; ignoring auth file")
+      return
+    }
+
+    const existing = this.load()
+    if (existing) {
+      if (existing.username !== params.username) {
+        // Keep existing username unless explicitly overridden later.
+        this.logger.debug({ existing: existing.username, requested: params.username }, "Auth username differs from requested")
+      }
+      this.bootstrapUsername = null
+      return
+    }
+
+    if (params.allowBootstrapWithoutPassword) {
+      this.bootstrapUsername = params.username
+      this.logger.debug({ authFilePath: this.authFilePath }, "No auth file present; bootstrap-only mode enabled")
+      return
+    }
+
+    throw new Error(
+      `No server password configured. Create ${this.authFilePath} or start with --password / CODENOMAD_SERVER_PASSWORD.`,
+    )
+  }
+
+  validateCredentials(username: string, password: string): boolean {
+    const auth = this.load()
+    if (!auth) {
+      return false
+    }
+
+    if (username !== auth.username) {
+      return false
+    }
+
+    return verifyPassword(password, auth.password)
+  }
+
+  setPassword(params: { password: string; markUserProvided: boolean }): AuthStatus {
+    if (this.overrideAuth) {
+      throw new Error(
+        "Server password is provided via CLI/env and cannot be changed while running. Restart without --password / CODENOMAD_SERVER_PASSWORD to use auth.json.",
+      )
+    }
+
+    const current = this.load()
+
+    if (!current) {
+      if (!this.bootstrapUsername) {
+        throw new Error("Auth is not initialized")
+      }
+
+      const created: AuthFile = {
+        version: 1,
+        username: this.bootstrapUsername,
+        password: hashPassword(params.password),
+        userProvided: params.markUserProvided,
+        updatedAt: new Date().toISOString(),
+      }
+
+      this.persist(created)
+      this.bootstrapUsername = null
+      return { username: created.username, passwordUserProvided: created.userProvided }
+    }
+
+    const next: AuthFile = {
+      ...current,
+      password: hashPassword(params.password),
+      userProvided: params.markUserProvided,
+      updatedAt: new Date().toISOString(),
+    }
+
+    this.persist(next)
+    return { username: next.username, passwordUserProvided: next.userProvided }
+  }
+
+  getStatus(): AuthStatus {
+    const current = this.load()
+    if (current) {
+      return { username: current.username, passwordUserProvided: current.userProvided }
+    }
+
+    if (this.bootstrapUsername) {
+      return { username: this.bootstrapUsername, passwordUserProvided: false }
+    }
+
+    throw new Error("Auth is not initialized")
+  }
+
+  private persist(auth: AuthFile) {
+    try {
+      fs.mkdirSync(path.dirname(this.authFilePath), { recursive: true })
+      fs.writeFileSync(this.authFilePath, JSON.stringify(auth, null, 2), "utf-8")
+      this.cachedFile = auth
+      this.logger.debug({ authFilePath: this.authFilePath }, "Persisted auth file")
+    } catch (error) {
+      this.logger.error({ err: error, authFilePath: this.authFilePath }, "Failed to persist auth file")
+      throw error
+    }
+  }
+}

packages/server/src/auth/http-auth.ts

@@ -0,0 +1,38 @@
+import type { FastifyReply, FastifyRequest } from "fastify"
+
+export function parseCookies(header: string | undefined): Record<string, string> {
+  const result: Record<string, string> = {}
+  if (!header) return result
+
+  const parts = header.split(";")
+  for (const part of parts) {
+    const index = part.indexOf("=")
+    if (index < 0) continue
+    const key = part.slice(0, index).trim()
+    const value = part.slice(index + 1).trim()
+    if (!key) continue
+    result[key] = decodeURIComponent(value)
+  }
+  return result
+}
+
+export function isLoopbackAddress(remoteAddress: string | undefined): boolean {
+  if (!remoteAddress) return false
+  if (remoteAddress === "127.0.0.1" || remoteAddress === "::1") return true
+  if (remoteAddress === "::ffff:127.0.0.1") return true
+  return false
+}
+
+export function wantsHtml(request: FastifyRequest): boolean {
+  const accept = (request.headers["accept"] ?? "").toString().toLowerCase()
+  return accept.includes("text/html") || accept.includes("application/xhtml")
+}
+
+export function sendUnauthorized(request: FastifyRequest, reply: FastifyReply) {
+  if (request.method === "GET" && !request.url.startsWith("/api/") && wantsHtml(request)) {
+    reply.redirect("/login")
+    return
+  }
+
+  reply.code(401).send({ error: "Unauthorized" })
+}

packages/server/src/auth/manager.ts

@@ -0,0 +1,113 @@
+import type { FastifyReply, FastifyRequest } from "fastify"
+import path from "path"
+import type { Logger } from "../logger"
+import { AuthStore } from "./auth-store"
+import { TokenManager } from "./token-manager"
+import { SessionManager } from "./session-manager"
+import { isLoopbackAddress, parseCookies } from "./http-auth"
+
+export const BOOTSTRAP_TOKEN_STDOUT_PREFIX = "CODENOMAD_BOOTSTRAP_TOKEN:" as const
+export const DEFAULT_AUTH_USERNAME = "codenomad" as const
+export const DEFAULT_AUTH_COOKIE_NAME = "codenomad_session" as const
+
+export interface AuthManagerInit {
+  configPath: string
+  username: string
+  password?: string
+  generateToken: boolean
+}
+
+export class AuthManager {
+  private readonly authStore: AuthStore
+  private readonly tokenManager: TokenManager | null
+  private readonly sessionManager = new SessionManager()
+  private readonly cookieName = DEFAULT_AUTH_COOKIE_NAME
+
+  constructor(private readonly init: AuthManagerInit, private readonly logger: Logger) {
+    const authFilePath = resolveAuthFilePath(init.configPath)
+    this.authStore = new AuthStore(authFilePath, logger.child({ component: "auth" }))
+
+    // Startup: password comes from CLI/env, auth.json, or bootstrap-only mode.
+    this.authStore.ensureInitialized({
+      username: init.username,
+      password: init.password,
+      allowBootstrapWithoutPassword: init.generateToken,
+    })
+
+    this.tokenManager = init.generateToken ? new TokenManager(60_000) : null
+  }
+
+  getCookieName(): string {
+    return this.cookieName
+  }
+
+  isTokenBootstrapEnabled(): boolean {
+    return Boolean(this.tokenManager)
+  }
+
+  issueBootstrapToken(): string | null {
+    if (!this.tokenManager) return null
+    return this.tokenManager.generate()
+  }
+
+  consumeBootstrapToken(token: string): boolean {
+    if (!this.tokenManager) return false
+    return this.tokenManager.consume(token)
+  }
+
+  validateLogin(username: string, password: string): boolean {
+    return this.authStore.validateCredentials(username, password)
+  }
+
+  createSession(username: string) {
+    return this.sessionManager.createSession(username)
+  }
+
+  getStatus() {
+    return this.authStore.getStatus()
+  }
+
+  setPassword(password: string) {
+    return this.authStore.setPassword({ password, markUserProvided: true })
+  }
+
+  isLoopbackRequest(request: FastifyRequest): boolean {
+    return isLoopbackAddress(request.socket.remoteAddress)
+  }
+
+  getSessionFromRequest(request: FastifyRequest): { username: string; sessionId: string } | null {
+    const cookies = parseCookies(request.headers.cookie)
+    const sessionId = cookies[this.cookieName]
+    const session = this.sessionManager.getSession(sessionId)
+    if (!session) return null
+    return { username: session.username, sessionId: session.id }
+  }
+
+  setSessionCookie(reply: FastifyReply, sessionId: string) {
+    reply.header("Set-Cookie", buildSessionCookie(this.cookieName, sessionId))
+  }
+
+  clearSessionCookie(reply: FastifyReply) {
+    reply.header("Set-Cookie", buildSessionCookie(this.cookieName, "", { maxAgeSeconds: 0 }))
+  }
+}
+
+function resolveAuthFilePath(configPath: string) {
+  const resolvedConfigPath = resolvePath(configPath)
+  return path.join(path.dirname(resolvedConfigPath), "auth.json")
+}
+
+function resolvePath(filePath: string) {
+  if (filePath.startsWith("~/")) {
+    return path.join(process.env.HOME ?? "", filePath.slice(2))
+  }
+  return path.resolve(filePath)
+}
+
+function buildSessionCookie(name: string, value: string, options?: { maxAgeSeconds?: number }) {
+  const parts = [`${name}=${encodeURIComponent(value)}`, "HttpOnly", "Path=/", "SameSite=Lax"]
+  if (options?.maxAgeSeconds !== undefined) {
+    parts.push(`Max-Age=${Math.max(0, Math.floor(options.maxAgeSeconds))}`)
+  }
+  return parts.join("; ")
+}

packages/server/src/auth/password-hash.ts

@@ -0,0 +1,49 @@
+import crypto from "crypto"
+
+export interface PasswordHashRecord {
+  algorithm: "scrypt"
+  saltBase64: string
+  hashBase64: string
+  keyLength: number
+  params: {
+    N: number
+    r: number
+    p: number
+    maxmem: number
+  }
+}
+
+const DEFAULT_SCRYPT_PARAMS = {
+  N: 16384,
+  r: 8,
+  p: 1,
+  maxmem: 32 * 1024 * 1024,
+}
+
+export function hashPassword(password: string): PasswordHashRecord {
+  const salt = crypto.randomBytes(16)
+  const params = DEFAULT_SCRYPT_PARAMS
+  const keyLength = 64
+  const derived = crypto.scryptSync(password, salt, keyLength, params)
+  return {
+    algorithm: "scrypt",
+    saltBase64: salt.toString("base64"),
+    hashBase64: Buffer.from(derived).toString("base64"),
+    keyLength,
+    params,
+  }
+}
+
+export function verifyPassword(password: string, record: PasswordHashRecord): boolean {
+  if (record.algorithm !== "scrypt") {
+    return false
+  }
+
+  const salt = Buffer.from(record.saltBase64, "base64")
+  const expected = Buffer.from(record.hashBase64, "base64")
+  const derived = crypto.scryptSync(password, salt, record.keyLength, record.params)
+  if (expected.length !== derived.length) {
+    return false
+  }
+  return crypto.timingSafeEqual(expected, Buffer.from(derived))
+}

packages/server/src/auth/session-manager.ts

@@ -0,0 +1,23 @@
+import crypto from "crypto"
+
+export interface SessionInfo {
+  id: string
+  createdAt: number
+  username: string
+}
+
+export class SessionManager {
+  private sessions = new Map<string, SessionInfo>()
+
+  createSession(username: string): SessionInfo {
+    const id = crypto.randomBytes(32).toString("base64url")
+    const info: SessionInfo = { id, createdAt: Date.now(), username }
+    this.sessions.set(id, info)
+    return info
+  }
+
+  getSession(id: string | undefined): SessionInfo | undefined {
+    if (!id) return undefined
+    return this.sessions.get(id)
+  }
+}

packages/server/src/auth/token-manager.ts

@@ -0,0 +1,32 @@
+import crypto from "crypto"
+
+export interface BootstrapToken {
+  token: string
+  createdAt: number
+  consumed: boolean
+}
+
+export class TokenManager {
+  private token: BootstrapToken | null = null
+
+  constructor(private readonly ttlMs: number) {}
+
+  generate(): string {
+    const token = crypto.randomBytes(32).toString("base64url")
+    this.token = { token, createdAt: Date.now(), consumed: false }
+    return token
+  }
+
+  consume(token: string): boolean {
+    if (!this.token) return false
+    if (this.token.consumed) return false
+    if (Date.now() - this.token.createdAt > this.ttlMs) return false
+    if (token !== this.token.token) return false
+    this.token.consumed = true
+    return true
+  }
+
+  peek(): string | null {
+    return this.token?.token ?? null
+  }
+}