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2FAir Features Overview

Status: ✅ Phase 3 Complete - Clean Architecture + PRF Implementation (Core Complete, Not Production Ready)
Last Updated: January 2025
Production Readiness: Phase 4 required for production deployment

🎯 Current Implementation Status

✅ Completed Features (Phase 1-3)

🏗️ Clean Architecture Foundation

  • Domain-Driven Design: Uncle Bob's Clean Architecture with strict layer separation
  • SOLID Principles: Single responsibility, dependency inversion, interface segregation
  • Zero Import Cycles: Clean dependency graph with proper architectural boundaries
  • Interface-Based Design: All services implement domain interfaces for testability
  • Package Organization: Domain-specific directories following Go best practices

🔐 Enhanced Security & Authentication

  • OAuth 2.0 Integration: Google OAuth for user authentication
  • WebAuthn PRF Support: Pseudo-Random Function for enhanced key derivation
  • Universal Fallback: credential.id + PBKDF2 for all WebAuthn devices
  • JWT Session Management: Secure token-based sessions with proper expiration
  • Multi-Factor Authentication: OAuth + WebAuthn hardware security

🔒 Zero-Knowledge Encryption

  • Client-Side Encryption: AES-256-GCM encryption before data leaves client
  • PRF-Enhanced Key Derivation: HKDF from WebAuthn PRF when available
  • Server Blindness: Server never sees plaintext TOTP secrets or codes
  • End-to-End Encryption: Complete zero-knowledge architecture
  • Session-Based Keys: Encryption keys cached in memory for seamless UX

📱 Modern TOTP Management

  • Real-Time Code Generation: Client-side TOTP generation using otpauth library
  • Multi-Algorithm Support: SHA1, SHA256, SHA512 compatibility
  • Progress Indicators: Visual countdown timers for code expiration
  • QR Code Support: Import TOTP secrets via QR code scanning
  • Standard Compatibility: Works with Google Authenticator, Authy, and all TOTP apps

🌐 Full-Stack Implementation

  • React Frontend: TypeScript + HeroUI + TanStack Query + Zustand
  • Go Backend: Clean architecture + Gin framework + PostgreSQL + SQLC
  • Modern UI/UX: Beautiful, responsive design with accessibility compliance
  • State Management: Optimistic updates and comprehensive error handling
  • API Design: RESTful API with comprehensive validation and error handling

📊 Feature Matrix

Authentication & Security

Feature Status Description
Google OAuth Login ✅ Complete Secure user authentication via Google
WebAuthn Registration ✅ Complete Hardware security key registration
WebAuthn PRF Support ✅ Complete Enhanced key derivation with PRF extension
JWT Session Management ✅ Complete Secure token-based sessions
Multi-Factor Authentication ✅ Complete OAuth + WebAuthn combined security
Zero-Knowledge Architecture ✅ Complete Server never sees plaintext data

TOTP Management

Feature Status Description
Create TOTP Seeds ✅ Complete Add new TOTP services with encryption
List TOTP Seeds ✅ Complete View all user's encrypted TOTP data
Update TOTP Seeds ✅ Complete Modify existing TOTP configurations
Delete TOTP Seeds ✅ Complete Remove TOTP services securely
Real-Time Code Generation ✅ Complete Client-side TOTP code generation
QR Code Import ✅ Complete Import secrets via QR code scanning
Multi-Algorithm Support ✅ Complete SHA1, SHA256, SHA512 algorithms

Frontend Features

Feature Status Description
Beautiful UI Design ✅ Complete Modern, accessible interface with HeroUI
Responsive Design ✅ Complete Works on desktop and mobile browsers
Real-Time Updates ✅ Complete Auto-refreshing TOTP codes with progress
Error Handling ✅ Complete User-friendly error messages and recovery
State Management ✅ Complete TanStack Query + Zustand for optimal UX
Client-Side Encryption ✅ Complete Zero-knowledge encryption in browser

🚧 Planned Features (Phase 4+)

Multi-Device Synchronization

Feature Status Description
Device Registration 🔄 Planned Register multiple devices per user
Cross-Device Sync 🔄 Planned Encrypted synchronization across devices
Conflict Resolution 🔄 Planned Handle sync conflicts intelligently
Device Management 🔄 Planned View and manage registered devices
Offline Support 🔄 Planned Queue sync operations when offline

Backup & Recovery

Feature Status Description
Encrypted Backups 🔄 Planned Client-side encrypted backup generation
Recovery Codes 🔄 Planned User passphrase-based recovery system
Account Recovery 🔄 Planned Secure account recovery flows

🔍 Technical Specifications

Security Specifications

  • Encryption: AES-256-GCM with authenticated encryption
  • Key Derivation: HKDF-SHA256 (PRF) or PBKDF2-SHA256 (fallback)
  • Authentication: OAuth 2.0 + WebAuthn multi-factor
  • Transport: HTTPS/TLS 1.3 required
  • Session: JWT with secure signing and expiration
  • Zero-Knowledge: Server never accesses plaintext data

Performance Specifications

  • Authentication: <500ms OAuth + JWT generation
  • WebAuthn Operations: <1s including PRF processing
  • TOTP Generation: <50ms client-side generation
  • API Response: <200ms for CRUD operations

Compatibility Specifications

  • Browsers: Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
  • WebAuthn: All FIDO2 compliant authenticators
  • TOTP: RFC 6238 compliant (Google Authenticator, Authy, etc.)
  • OAuth: Google OAuth 2.0 (additional providers planned)

Feature Status: ✅ Phase 3 Complete - Clean Architecture + PRF Implementation
Next Milestone: Multi-Device Synchronization & Production Hardening