Integrity Failures in Adonisjs with Api Keys

In AdonisJS applications that rely on API keys for access control, integrity failures occur when the framework or its surrounding middleware does not adequately validate the origin, scope, or binding of a key to a specific request context. This mismatch can allow an attacker to reuse a valid key across users, endpoints, or operations, bypassing intended authorization boundaries.

API keys are often treated as static secrets, but if they are not tied to a per-request context such as user ID, resource ID, or a signed nonce, an attacker can capture a key (for example, from logs, error messages, or client-side code) and replay it to access or modify other resources. In AdonisJS, this commonly happens when keys are checked only at the route or controller level without verifying that the key owner has permission for the specific resource being accessed (BOLA/IDOR). The framework does not inherently enforce ownership unless explicitly programmed, so integrity checks must be implemented at the point of use.

Another integrity risk arises from key leakage into logs, error responses, or client-side storage. AdonisJS may expose API key values in debug output if environment variables are misconfigured or if custom logging inadvertently includes request headers. When keys are exposed, their integrity is compromised, and an attacker can use them to forge authenticated requests. Additionally, if the same API key is used for both read and write operations, integrity failures can lead to privilege escalation when an attacker modifies data using a key that was originally intended for read-only access.

SSRF and external request dependencies can further undermine integrity. If an AdonisJS endpoint accepts a URL or host header and uses a shared API key to make outbound requests, an attacker can manipulate inputs to direct the request to internal services. The integrity of the key usage context is lost because the key is applied to unintended destinations, potentially exposing internal APIs or metadata. This pattern is common in integrations with third-party services where API keys are stored in configuration files and reused across multiple outbound calls without scoping.

OpenAPI spec analysis can help detect these integrity risks by revealing inconsistent security schemes, missing scope definitions, or unresolved $ref paths that imply shared or ambiguous key usage. When runtime findings show that certain endpoints accept API keys without validating the associated user or resource context, it signals an integrity gap. middleBrick flags these scenarios by cross-referencing spec definitions with observed runtime behavior, highlighting where key usage lacks binding to the requester or the target resource.

Remediation focuses on binding API keys to specific contexts, validating ownership, and isolating key usage to prevent reuse across users or operations. Below are concrete, syntactically correct examples for AdonisJS that demonstrate these principles.

1. Key-to-User Binding with Middleware

Ensure each API key maps to a specific user and validate that the requesting user matches the key owner before proceeding.

// start/hooks.ts
import { HttpContextContract } from '@ioc:Adonis/Core/HttpContext'

export const validateApiKey = async (ctx: HttpContextContract) => {
  const apiKey = ctx.request.header('X-API-Key')
  if (!apiKey) {
    ctx.response.status(401).json({ error: 'API key missing' })
    return
  }

  const keyRecord = await Database.from('api_keys').where('key', apiKey).first()
  if (!keyRecord) {
    ctx.response.status(403).json({ error: 'Invalid API key' })
    return
  }

  // Bind key to user context
  ctx.auth.user = await User.find(keyRecord.user_id)
  if (!ctx.auth.user) {
    ctx.response.status(403).json({ error: 'Key owner not found' })
    return
  }

  // Enforce resource ownership on sensitive routes
  const userId = ctx.params.userId
  if (ctx.auth.user.id !== Number(userId)) {
    ctx.response.status(403).json({ error: 'Forbidden: resource ownership mismatch' })
    return
  }

  await next()
}

2. Per-Request Scoping for Write Operations

Use different keys for read and write actions, and validate scope on each write request.

// controllers/UsersController.ts
import { schema, rules } from '@ioc:Adonis/Core/Validator'

export class UsersController {
  public async updateProfile({ request, auth }: HttpContextContract) {
    const apiKey = request.header('X-API-Key')
    const keyRecord = await ApiKey.query().where('key', apiKey).with('scope').firstOrFail()

    if (!keyRecord.scope.can('write', 'user_profile')) {
      return response.badRequest({ error: 'Insufficient scope for write operation' })
    }

    const user = auth.user
    const body = request.validate({
      schema: schema.create({
        name: schema.string.optional(),
        email: schema.string.optional([rules.email()]),
      }),
    })

    user.merge(body)
    await user.save()

    return user
  }
}

3. Contextual Key Usage in Outbound Requests

Avoid reusing a single API key for external calls without validating the target endpoint.

// services/ExternalApiClient.ts
import axios from 'axios'

export class ExternalApiClient {
  constructor(private apiKey: string) {}

  public async fetchResource(path: string, allowedHost: string) {
    const url = new URL(path, allowedHost)
    if (!url.hostname.endsWith(allowedHost)) {
      throw new Error('Host mismatch: key cannot be used for this destination')
    }

    return axios.get(url.toString(), {
      headers: { 'X-API-Key': this.apiKey },
    })
  }
}

4. Logging Safeguards to Preserve Key Integrity

Prevent API key values from appearing in logs or error output by filtering headers.

// start/hooks.ts or middleware
import { HttpContextContract } from '@ioc:Adonis/Core/HttpContext'

export const sanitizeLogging = (ctx: HttpContextContract) => {
  const headers = { ...ctx.request.headers() }
  delete headers['x-api-key']
  ctx.request.log({ headers })
}

5. Middleware Registration

Apply the validation middleware to routes that require key binding and ownership checks.

// start/routes.ts
Route.group(() => {
  Route.get('users/:userId/profile', 'UsersController.show').middleware('apiKey')
  Route.put('users/:userId', 'UsersController.updateProfile').middleware('apiKey')
}).prefix('api/v1')