Two Factor Laravel Package

Technical Evaluation

Architecture Fit

• Modular & Contract-Based: The package leverages Laravel’s contract/trait pattern (TwoFactorAuthenticatable, TwoFactorAuthentication), enabling seamless integration without forcing architectural changes. This aligns well with Laravel’s ecosystem and promotes loose coupling.
• On-Premises TOTP: Eliminates dependency on third-party APIs (e.g., Authy, Duo), reducing latency and compliance risks. Ideal for GDPR/privacy-sensitive applications.
• Event-Driven: Built-in events (TwoFactorEnabled, TwoFactorRecoveryCodesDepleted) allow for extensibility (e.g., logging, notifications) without modifying core logic.
• Middleware Support: Pre-built middleware (2fa.enabled, 2fa.confirm) simplifies route protection, reducing boilerplate.

Key Strengths:

• Zero External Dependencies: Self-contained TOTP implementation.
• Backward Compatibility: Works alongside Laravel’s default Auth system (e.g., Auth::attemptWhen).
• Customizable: Supports passkey integration (via Laragear/WebAuthn) and recovery code generators.

Potential Gaps:

• No SMS/Email 2FA: Limited to TOTP; lacks multi-factor redundancy (e.g., backup codes via email).
• Session Management: Relies on session-flashed credentials for 2FA retries, which may conflict with stateless APIs (e.g., SPAs).

Integration Feasibility

• Laravel 12+ Only: Requires PHP 8.3+, which may necessitate infrastructure upgrades for legacy systems.
• Database Schema: Includes a migration for 2FA secrets/recovery codes. Customization (e.g., table names) is supported but requires manual adjustments.
• Authentication Flow: Designed to integrate with Laravel’s default Auth system, but may require tweaks for:
  • Scaffolding Packages: Jetstream/Fortify/Breeze users must override default login logic (e.g., Auth2FA::attempt()).
  • Stateless APIs: Session-based credential flashing won’t work; requires alternative storage (e.g., JWT claims).
• UI/UX: Provides default views for QR code generation and 2FA prompts, but theming may need customization.

Critical Path Dependencies:

1. User Model: Must implement TwoFactorAuthenticatable and use TwoFactorAuthentication trait.
2. Login Flow: Replace or extend Auth::attempt() with Auth2FA::attempt().
3. Middleware: Apply 2fa.enabled to protected routes.

Technical Risk

Highest Priority:

• Stateless API Support: If targeting mobile/SPAs, plan for credential storage outside sessions (e.g., encrypted JWT payloads).
• Recovery Workflow: Define a process for users locked out due to depleted recovery codes (e.g., admin-initiated reset).

Key Questions for Stakeholders

1. Authentication Scope:
   • Will 2FA be mandatory for all users, or optional? (Affects middleware placement.)
   • Are there user roles exempt from 2FA? (Requires contract-based exclusion logic.)
2. API Compatibility:
   • Is the application stateless (e.g., API-only)? If so, how will credentials be persisted for 2FA retries?
3. Compliance:
   • Are there regulatory requirements for recovery codes (e.g., audit logs, expiration)?
   • Should recovery codes be stored encrypted or hashed?
4. User Experience:
   • Should 2FA be enforced on first login, or opt-in?
   • Is there a need for "trusted devices" (safe device bypass)?
5. Infrastructure:
   • Can PHP 8.3+ and Laravel 12 be adopted? If not, what’s the fallback?
   • Are there existing auth packages (e.g., Sanctum, Passport) that may conflict?

Integration Approach

Stack Fit

• Laravel Ecosystem: Optimized for Laravel 12+ with native support for:
  • Facades (Auth2FA), traits, and contracts.
  • Artisan commands (two-factor:install).
  • Blade views and translations.
• PHP 8.3 Features: Leverages typed properties, enums, and attributes for maintainability.
• Database Agnostic: Works with any Laravel-supported DB (MySQL, PostgreSQL, SQLite).

Compatibility Notes:

• Non-Laravel PHP: Not applicable; package is Laravel-specific.
• Legacy Laravel: Requires significant refactoring (e.g., PHP 8.3 syntax, Laravel 12 features).
• Microservices: Session-sharing may complicate distributed setups; consider sticky sessions or alternative storage.

Migration Path

Rollback Plan:

• Database: Maintain a backup before migrations; provide a two-factor:rollback command if available.
• Code: Use feature flags to toggle 2FA logic during testing.

Compatibility

Sequencing

1. Infrastructure First:
   • Upgrade PHP/Laravel in staging → production.
   • Test two-factor:install in isolation.
2. Core Integration:
   • Update User model and run migrations.
   • Implement Auth2FA::attempt() in login flow.
3. Protection Layer:
   • Apply 2fa.enabled middleware to sensitive routes.
   • Build 2fa.notice view.
4. User Onboarding:
   • Add 2FA setup flow (QR code generation, recovery code display).
   • Test with real authenticator apps (e.g., Google Authenticator).
5. Observability:
   • Monitor events and failed attempts.
   • Implement recovery code depletion alerts.

Critical Path:

• Login Flow: Must be tested end-to-end before exposing to users.
• Recovery Codes: Validate backup workflows (e.g., admin reset) before production.

Operational Impact

Maintenance

• Package Updates:
  • Monitor GitHub Releases for breaking changes.
  • Test updates in staging; prefer semantic versioning (^ in composer.json).
• Dependency Management:
  • Laravel 12+ and PHP 8.3+ are required; align with your support lifecycle.

• Customizations: