pos-system/services/iam-service/docs/IMPLEMENTATION.md

IAM Service Implementation Summary

Note

: This document consolidates implementation details, completion status, and architecture overview. For migration guide, see IAM Migration Guide For architecture proposal, see IAM Proposal

✅ Completed Features

1. Core Infrastructure

• ✅ Multi-layer caching (Memory → Redis)
• ✅ Database schema với Prisma (RBAC, Social, Sessions, MFA)
• ✅ Event sourcing cho audit logs
• ✅ Zero-trust security middleware

2. Authentication

• ✅ User registration với password hashing
• ✅ Login với JWT tokens
• ✅ Logout với session revocation
• ✅ Token refresh mechanism
• ✅ Secure cookie management

3. RBAC (Role-Based Access Control)

• ✅ Roles và Permissions system
• ✅ User-Role assignments với expiration
• ✅ Direct user permissions (override roles)
• ✅ Permission caching
• ✅ RBAC middleware

4. ABAC (Attribute-Based Access Control)

• ✅ Policy engine với JSON logic
• ✅ Policy evaluation
• ✅ Time-based access control

5. Social Authentication

• ✅ Google OAuth 2.0
• ✅ Facebook OAuth
• ✅ GitHub OAuth
• ✅ Circuit breaker cho external APIs
• ✅ Account linking

6. OIDC (OpenID Connect)

• ✅ OIDC Provider implementation
• ✅ Discovery endpoint
• ✅ Authorization code flow
• ✅ Token endpoint
• ✅ UserInfo endpoint
• ✅ JWKS endpoint
• ✅ OIDC Client support

7. MFA (Multi-Factor Authentication)

• ✅ TOTP (Time-based One-Time Password)
• ✅ QR code generation
• ✅ MFA device management
• ✅ MFA verification

8. Session Management

• ✅ Distributed sessions
• ✅ Device fingerprinting
• ✅ Session expiration
• ✅ Session revocation
• ✅ Multiple device support

9. Security Features

• ✅ Zero-trust validation
• ✅ CSRF protection
• ✅ Dynamic rate limiting (based on roles)
• ✅ Device fingerprinting
• ✅ Audit logging

10. API Endpoints

Authentication

• POST /api/v1/auth/register - Register new user
• POST /api/v1/auth/login - Login user
• POST /api/v1/auth/logout - Logout user
• POST /api/v1/auth/refresh - Refresh access token
• GET /api/v1/auth/me - Get current user

Social Auth

• GET /api/v1/auth/google - Initiate Google OAuth
• GET /api/v1/auth/google/callback - Google callback
• GET /api/v1/auth/facebook - Initiate Facebook OAuth
• GET /api/v1/auth/facebook/callback - Facebook callback
• GET /api/v1/auth/github - Initiate GitHub OAuth
• GET /api/v1/auth/github/callback - GitHub callback

OIDC

• GET /.well-known/openid-configuration - Discovery
• GET /api/v1/oidc/authorize - Authorization
• POST /api/v1/oidc/token - Token exchange
• GET /api/v1/oidc/userinfo - User info
• GET /api/v1/oidc/jwks - JWKS

RBAC

• GET /api/v1/rbac/permissions - Get user permissions
• POST /api/v1/rbac/roles/assign - Assign role
• POST /api/v1/rbac/roles/revoke - Revoke role
• POST /api/v1/rbac/permissions/grant - Grant permission
• GET /api/v1/rbac/permissions/check - Check permission

MFA

• POST /api/v1/mfa/totp/enable - Enable TOTP
• POST /api/v1/mfa/totp/verify - Verify and enable TOTP
• POST /api/v1/mfa/totp/validate - Validate TOTP token
• POST /api/v1/mfa/disable - Disable MFA
• GET /api/v1/mfa/devices - Get MFA devices

📋 Database Schema

Models

• User - User accounts
• Role - RBAC roles
• Permission - Granular permissions
• UserRole - User-role assignments
• RolePermission - Role-permission mappings
• UserPermission - Direct user permissions
• Session - Active sessions
• RefreshToken - Refresh tokens
• SocialAccount - Social login accounts
• MFADevice - MFA devices
• AuthEvent - Audit events
• Policy - ABAC policies

🔧 Configuration

Environment Variables

See env.local.example for all required environment variables.

Key Configurations

• JWT secrets (access, refresh, ID tokens)
• OAuth client IDs and secrets
• Database connection
• Redis connection
• OIDC issuer URL

🚀 Next Steps (Future Enhancements)

1. Database Sharding - For 100M+ users
2. Multi-region Deployment - High availability
3. WebAuthn - Advanced MFA
4. OIDC Multi-tenancy - Enterprise customers
5. Load Testing - K6 tests for 50k req/s
6. Advanced Monitoring - Datadog, ELK stack
7. Rate Limiting Refinement - ML-based behavior analysis

📝 Notes

• All code includes bilingual comments (EN/VI)
• Follows GoodGo project standards
• Uses Prisma for type-safe database access
• Implements repository pattern
• Event sourcing for audit compliance
• Zero-trust security by default