feat: initial commit - WebAuthn passkey authentication service

- Complete WebAuthn/FIDO2 authentication implementation - SQLite database with user and credential management - Email-based user identification with allowlist support - Admin approval workflow for new users - Session management with secure cookies - Docker containerization with Debian base for SQLite compatibility - Kubernetes deployment manifests with nginx ingress support - Web-based admin interface for user management - Comprehensive documentation and deployment guides - Standard open source project structure with CI/CD
2026-08-08 20:15:44 +10:00 · 2025-08-04 18:35:44 +10:00
commit 9427c36b8b
33 changed files with 3741 additions and 0 deletions
@@ -0,0 +1,46 @@
+---
+name: Bug Report
+about: Create a report to help us improve
+title: '[BUG] '
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Environment (please complete the following information):**
+- OS: [e.g. macOS, Linux, Windows]
+- Go Version: [e.g. 1.21.0]
+- Browser: [e.g. Chrome, Firefox, Safari]
+- Docker Version: [if using Docker]
+- Kubernetes Version: [if using Kubernetes]
+
+**Configuration**
+- Are you using email allowlist? [yes/no]
+- Is admin approval enabled? [yes/no]
+- Deployment method: [Docker, Kubernetes, direct binary]
+
+**Logs**
+If applicable, add logs to help diagnose the problem.
+
+```
+Paste relevant logs here
+```
+
+**Additional context**
+Add any other context about the problem here.
@@ -0,0 +1,29 @@
+---
+name: Feature Request
+about: Suggest an idea for this project
+title: '[FEATURE] '
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Use case**
+Describe the specific use case this feature would address.
+
+**Implementation considerations**
+- Would this be backwards compatible?
+- Any security implications?
+- Database schema changes needed?
+- Configuration changes required?
+
+**Additional context**
+Add any other context, mockups, or examples about the feature request here.
@@ -0,0 +1,38 @@
+## Description
+Brief description of what this PR does.
+
+## Type of Change
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation update
+- [ ] Performance improvement
+- [ ] Code refactoring
+
+## Testing
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes
+- [ ] I have tested the changes manually
+
+## Checklist
+- [ ] My code follows the project's style guidelines
+- [ ] I have performed a self-review of my code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] I have updated the CHANGELOG.md if needed
+
+## Security Considerations
+- [ ] This change does not introduce any security vulnerabilities
+- [ ] I have considered the security implications of this change
+- [ ] Authentication/authorization is properly handled
+
+## Breaking Changes
+If this PR introduces breaking changes, please describe them here and update the major version.
+
+## Screenshots/Demos
+If applicable, add screenshots or demo videos.
+
+## Related Issues
+Closes #(issue_number)
+Related to #(issue_number)
@@ -0,0 +1,140 @@
+name: CI/CD
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main ]
+  release:
+    types: [ published ]
+
+env:
+  GO_VERSION: '1.21'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: ${{ env.GO_VERSION }}
+
+    - name: Cache Go modules
+      uses: actions/cache@v3
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go-
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y gcc libsqlite3-dev
+
+    - name: Download dependencies
+      run: go mod download
+
+    - name: Verify dependencies
+      run: go mod verify
+
+    - name: Run tests
+      run: go test -v -race -coverprofile=coverage.out ./...
+
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v3
+      with:
+        file: ./coverage.out
+        flags: unittests
+        name: codecov-umbrella
+
+    - name: Build binary
+      run: |
+        CGO_ENABLED=1 go build -v -o passkey-auth .
+        
+    - name: Test binary
+      run: |
+        ./passkey-auth --help || true  # Some apps don't have --help
+        echo "Binary built successfully"
+
+  docker:
+    runs-on: ubuntu-latest
+    needs: test
+    if: github.event_name == 'push' || github.event_name == 'release'
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to Docker Hub
+      if: github.event_name == 'release'
+      uses: docker/login-action@v3
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+
+    - name: Extract metadata
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: |
+          passkey-auth
+        tags: |
+          type=ref,event=branch
+          type=ref,event=pr
+          type=semver,pattern={{version}}
+          type=semver,pattern={{major}}.{{minor}}
+          type=semver,pattern={{major}}
+          type=sha,prefix={{branch}}-
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        platforms: linux/amd64,linux/arm64
+        push: ${{ github.event_name == 'release' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: ${{ env.GO_VERSION }}
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y gcc libsqlite3-dev
+
+    - name: Run golangci-lint
+      uses: golangci/golangci-lint-action@v3
+      with:
+        version: latest
+        args: --timeout=5m
+
+  security:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Run Gosec Security Scanner
+      uses: securecodewarrior/github-action-gosec@master
+      with:
+        args: './...'
@@ -0,0 +1,58 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+bin/
+passkey-auth
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+
+# Database files
+*.db
+*.sqlite
+*.sqlite3
+
+# Configuration files with secrets
+config-prod.yaml
+.env
+.env.local
+
+# Data directory
+data/
+
+# IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Docker
+.docker/
+
+# Kubernetes secrets
+k8s/*-secret.yaml
+
+# Development files
+dev-*
@@ -0,0 +1,70 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+- Initial release of Passkey Auth
+- WebAuthn (FIDO2) authentication support
+- SQLite database with user management
+- Email-based user identification
+- Admin approval workflow for new users
+- Email allowlist support
+- Session management with secure cookies
+- Kubernetes deployment configuration
+- nginx ingress auth backend support
+- Docker containerization with Debian base
+- Web-based admin interface
+- User registration and login flows
+- Real-time WebAuthn credential management
+
+### Features
+- **Authentication**: WebAuthn/FIDO2 passkey authentication
+- **Database**: SQLite with user and credential storage
+- **Admin Interface**: Web UI for user management and approval
+- **Email Allowlist**: Restrict registration to specific email addresses
+- **Session Management**: Secure session handling with configurable secrets
+- **Docker Support**: Multi-stage builds with Debian base for SQLite compatibility
+- **Kubernetes Ready**: Complete deployment manifests and ingress configuration
+- **nginx Integration**: Auth backend for protecting upstream services
+
+### Security
+- WebAuthn challenge/response authentication
+- Secure session cookie handling
+- Admin approval workflow
+- Email-based access control
+- HTTPS-ready configuration
+
+### Documentation
+- Comprehensive README with setup instructions
+- API endpoint documentation
+- Kubernetes deployment guide
+- Docker usage examples
+- Troubleshooting guide
+- Contributing guidelines
+
+### Technical Details
+- Go 1.21+ with CGO for SQLite
+- Base64URL encoding/decoding for WebAuthn data
+- CORS support for cross-origin requests
+- Environment variable configuration
+- Health check endpoints
+- Structured logging
+
+## [0.1.0] - 2025-08-04
+
+### Added
+- Initial project structure
+- Core WebAuthn implementation
+- SQLite database integration
+- Basic web interface
+- Docker containerization
+- Kubernetes manifests
+
+---
+
+**Note**: This project follows semantic versioning. For upgrade instructions and breaking changes, see the README.md file.
@@ -0,0 +1,129 @@
+# Contributing to Passkey Auth
+
+Thank you for your interest in contributing to Passkey Auth! This document provides guidelines for contributing to the project.
+
+## 🚀 Getting Started
+
+1. Fork the repository
+2. Clone your fork: `git clone https://github.com/yourusername/passkey-auth.git`
+3. Create a feature branch: `git checkout -b feature/your-feature-name`
+4. Make your changes
+5. Test your changes
+6. Commit and push to your fork
+7. Create a Pull Request
+
+## 🛠️ Development Setup
+
+### Prerequisites
+- Go 1.21 or later
+- Docker (for containerized testing)
+- Make (optional, for build scripts)
+
+### Local Development
+```bash
+# Clone the repository
+git clone https://github.com/yourusername/passkey-auth.git
+cd passkey-auth
+
+# Install dependencies
+go mod download
+
+# Run the application
+go run .
+
+# Run tests
+go test ./...
+```
+
+### Docker Development
+```bash
+# Build Docker image
+./scripts/build.sh
+
+# Run with Docker
+docker run -p 8080:8080 passkey-auth
+```
+
+## 📋 Guidelines
+
+### Code Style
+- Follow standard Go formatting (`gofmt`)
+- Use meaningful variable and function names
+- Add comments for exported functions and complex logic
+- Keep functions focused and small
+
+### Commit Messages
+- Use clear, descriptive commit messages
+- Start with a verb in present tense ("Add", "Fix", "Update")
+- Include context for why the change was made
+
+Example:
+```
+Add email allowlist support for user registration
+
+- Allows administrators to restrict registration to specific email domains
+- Configurable via config.yaml or environment variables
+- Backwards compatible (empty list allows all emails)
+```
+
+### Testing
+- Write tests for new features
+- Ensure existing tests pass
+- Test both success and error cases
+- Include integration tests for new endpoints
+
+### Documentation
+- Update README.md for new features
+- Add inline code comments
+- Update API documentation if endpoints change
+- Include examples in documentation
+
+## 🐛 Bug Reports
+
+When reporting bugs, please include:
+- Go version
+- Operating system
+- Steps to reproduce
+- Expected vs actual behavior
+- Relevant logs or error messages
+
+## 💡 Feature Requests
+
+When requesting features:
+- Describe the use case
+- Explain why it would be valuable
+- Consider backwards compatibility
+- Provide examples if possible
+
+## 🔐 Security
+
+For security vulnerabilities:
+- Do not open public issues
+- Contact maintainers directly
+- Provide detailed reproduction steps
+- Allow time for fixes before disclosure
+
+## 📜 Code of Conduct
+
+- Be respectful and inclusive
+- Welcome newcomers and help them learn
+- Focus on constructive feedback
+- Respect different viewpoints and experiences
+
+## 🏷️ Release Process
+
+1. Update version in relevant files
+2. Update CHANGELOG.md
+3. Create release PR
+4. Tag release after merge
+5. Build and publish Docker images
+6. Create GitHub release with notes
+
+## 📞 Getting Help
+
+- Check existing issues and documentation first
+- Open an issue for bugs or feature requests
+- Join discussions in existing issues
+- Ask questions in issues (we're happy to help!)
+
+Thank you for contributing! 🎉
@@ -0,0 +1,45 @@
+# Build stage
+FROM golang:1.21-bullseye AS builder
+
+# Install build dependencies including sqlite
+RUN apt-get update && apt-get install -y gcc libsqlite3-dev && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Copy go mod files
+COPY go.mod go.sum ./
+
+# Download dependencies
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build the application (remove static linking for SQLite compatibility)
+RUN CGO_ENABLED=1 GOOS=linux go build -a -o passkey-auth .
+
+# Final stage
+FROM debian:bullseye-slim
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y ca-certificates libsqlite3-0 && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /root/
+
+# Copy the binary from builder stage
+COPY --from=builder /app/passkey-auth .
+
+# Copy web files
+COPY --from=builder /app/web ./web/
+
+# Copy default config
+COPY --from=builder /app/config.yaml .
+
+# Create directory for database
+RUN mkdir -p /data
+
+# Expose port
+EXPOSE 8080
+
+# Run the application
+CMD ["./passkey-auth"]
@@ -0,0 +1,122 @@
+# 📋 Implementation Summary
+
+## What We've Built
+
+✅ **Complete Passkey Authentication System** with email-based access control
+✅ **SQLite Database** for persistent user storage
+✅ **Email Allowlist System** for controlling who can register
+✅ **Kubernetes Integration** with nginx ingress auth backend
+✅ **Modern Web UI** for user registration and management
+✅ **Production-Ready Deployment** with Docker and Kubernetes manifests
+
+## Key Features Implemented
+
+### 🔐 Email-Based Authentication
+- Users are identified by email addresses (not usernames)
+- Configurable email allowlist for access control
+- Environment variable support for email configuration
+
+### 📧 Email Access Control Options
+
+1. **Open Mode**: Empty allowlist allows any email
+2. **Restricted Mode**: Only allowlisted emails can register
+3. **Combined Security**: Allowlist + manual approval
+
+### 🗄️ Database Architecture (SQLite)
+```sql
+-- Users table
+CREATE TABLE users (
+    id INTEGER PRIMARY KEY,
+    email TEXT UNIQUE NOT NULL,     -- Email as primary identifier
+    display_name TEXT NOT NULL,
+    approved BOOLEAN DEFAULT FALSE,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Credentials table (WebAuthn keys)
+CREATE TABLE credentials (
+    id BLOB PRIMARY KEY,
+    user_id INTEGER REFERENCES users(id),
+    public_key BLOB NOT NULL,
+    attestation_type TEXT NOT NULL,
+    aaguid BLOB,
+    sign_count INTEGER DEFAULT 0,
+    clone_warning BOOLEAN DEFAULT FALSE,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+```
+
+### ⚙️ Configuration Options
+
+```yaml
+auth:
+  session_secret: "your-secret-key"
+  require_approval: true           # Admin approval required
+  allowed_emails:                  # Email allowlist
+    - "admin@company.com"
+    - "engineering@company.com"
+```
+
+Or via environment variables:
+```bash
+export ALLOWED_EMAILS="admin@company.com,user1@company.com,user2@company.com"
+export SESSION_SECRET="your-secure-session-secret"
+```
+
+## Files Created/Modified
+
+### Core Application
+- `main.go` - Application entry point
+- `internal/config/` - Configuration management with email allowlist
+- `internal/database/` - SQLite database layer with email-based users
+- `internal/auth/` - WebAuthn implementation
+- `internal/handlers/` - HTTP handlers with email validation
+
+### Web Interface
+- `web/index.html` - Admin UI updated for email addresses
+
+### Deployment
+- `Dockerfile` - Container build
+- `k8s/` - Kubernetes manifests
+- `docker-compose.yml` - Local development
+- `scripts/` - Build and deployment scripts
+
+### Documentation
+- `README.md` - Complete usage guide
+- `PRODUCTION.md` - Production deployment guide
+- `config.example.yaml` - Example configuration
+
+## How It Works
+
+1. **Email Validation**: When a user tries to register, the system checks if their email is in the allowlist (if configured)
+2. **Database Storage**: User data is stored in SQLite with email as the unique identifier
+3. **WebAuthn Integration**: Passkey credentials are linked to the user record
+4. **Session Management**: Authentication sessions use email-based identification
+5. **Nginx Integration**: Auth headers include user email for downstream applications
+
+## Quick Start
+
+```bash
+# 1. Configure email allowlist
+vim config.yaml  # Add your allowed emails
+
+# 2. Start the service
+./scripts/dev.sh
+
+# 3. Register users at http://localhost:8080
+# Only emails in the allowlist can register
+
+# 4. Deploy to Kubernetes
+./scripts/build.sh
+./scripts/deploy.sh
+```
+
+## Security Benefits
+
+- **No passwords stored** - Only WebAuthn public keys
+- **Email-based access control** - Restrict registration to specific domains/emails
+- **Phishing resistant** - WebAuthn is tied to the domain
+- **MFA built-in** - Passkeys require user presence and verification
+- **Session security** - Secure cookie-based sessions
+
+This implementation provides a complete, production-ready passkey authentication system with fine-grained email-based access control, perfect for enterprise environments where you need to restrict access to specific users.
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Passkey Auth Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
@@ -0,0 +1,67 @@
+.PHONY: help build run dev test clean docker-build docker-run k8s-deploy k8s-undeploy
+
+help: ## Show this help message
+	@echo 'Usage: make [target]'
+	@echo ''
+	@echo 'Targets:'
+	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z_-]+:.*?## / {printf "  %-15s %s\n", $$1, $$2}' $(MAKEFILE_LIST)
+
+build: ## Build the Go binary
+	@echo "🔨 Building..."
+	@go build -o bin/passkey-auth .
+
+run: build ## Run the application locally
+	@echo "🚀 Running..."
+	@./bin/passkey-auth
+
+dev: ## Run in development mode with hot reload
+	@echo "🔧 Starting development server..."
+	@./scripts/dev.sh
+
+test: ## Run tests
+	@echo "🧪 Running tests..."
+	@go test -v ./...
+
+clean: ## Clean build artifacts
+	@echo "🧹 Cleaning..."
+	@rm -rf bin/
+	@rm -f *.db
+
+docker-build: ## Build Docker image
+	@echo "🐳 Building Docker image..."
+	@docker build -t passkey-auth:latest .
+
+docker-run: docker-build ## Run with Docker Compose
+	@echo "🐳 Starting with Docker Compose..."
+	@mkdir -p data
+	@docker-compose up -d
+	@echo "Access the application at http://localhost:8080"
+
+docker-stop: ## Stop Docker Compose
+	@echo "🛑 Stopping Docker Compose..."
+	@docker-compose down
+
+k8s-deploy: docker-build ## Deploy to Kubernetes
+	@echo "☸️  Deploying to Kubernetes..."
+	@./scripts/deploy.sh
+
+k8s-undeploy: ## Remove from Kubernetes
+	@echo "☸️  Removing from Kubernetes..."
+	@./scripts/undeploy.sh
+
+deps: ## Download dependencies
+	@echo "📦 Downloading dependencies..."
+	@go mod download
+	@go mod tidy
+
+fmt: ## Format code
+	@echo "🎨 Formatting code..."
+	@go fmt ./...
+
+lint: ## Run linter
+	@echo "🔍 Running linter..."
+	@golangci-lint run
+
+security: ## Run security scan
+	@echo "🔒 Running security scan..."
+	@gosec ./...
@@ -0,0 +1,287 @@
+# Production Deployment Guide
+
+This guide covers deploying Passkey Auth in a production Kubernetes environment.
+
+## Prerequisites
+
+- Kubernetes cluster with nginx ingress controller
+- Domain name with SSL certificate
+- kubectl access to the cluster
+- Docker registry access (optional, for custom builds)
+
+## Step 1: Prepare Configuration
+
+1. **Generate Session Secret**:
+```bash
+openssl rand -base64 32
+```
+
+2. **Update Kubernetes Configuration**:
+
+Edit `k8s/deployment.yaml` and update the ConfigMap:
+
+```yaml
+data:
+  config.yaml: |
+    server:
+      port: "8080"
+      host: "0.0.0.0"
+
+    webauthn:
+      rp_display_name: "Your Company Auth"
+      rp_id: "auth.yourcompany.com"        # Your auth domain
+      rp_origins:
+        - "https://auth.yourcompany.com"    # Your auth URL
+        - "https://app.yourcompany.com"     # Your app URLs
+
+    database:
+      path: "/data/passkey-auth.db"
+
+    cors:
+      allowed_origins:
+        - "https://auth.yourcompany.com"
+        - "https://app.yourcompany.com"
+
+    auth:
+      session_secret: "YOUR_GENERATED_SECRET_HERE"
+      require_approval: true
+```
+
+## Step 2: Deploy to Kubernetes
+
+1. **Create Namespace**:
+```bash
+kubectl apply -f k8s/namespace.yaml
+```
+
+2. **Deploy Application**:
+```bash
+kubectl apply -f k8s/deployment.yaml
+```
+
+3. **Verify Deployment**:
+```bash
+kubectl get pods -n passkey-auth
+kubectl logs -f deployment/passkey-auth -n passkey-auth
+```
+
+## Step 3: Configure SSL/TLS
+
+Create an ingress with SSL termination:
+
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: passkey-auth-ingress
+  namespace: passkey-auth
+  annotations:
+    cert-manager.io/cluster-issuer: "letsencrypt-prod"  # If using cert-manager
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+spec:
+  tls:
+  - hosts:
+    - auth.yourcompany.com
+    secretName: passkey-auth-tls
+  rules:
+  - host: auth.yourcompany.com
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: passkey-auth-service
+            port:
+              number: 80
+```
+
+## Step 4: Configure Your Application Ingress
+
+Update your application's ingress to use passkey auth:
+
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: your-app-ingress
+  annotations:
+    # Auth configuration
+    nginx.ingress.kubernetes.io/auth-url: "http://passkey-auth-service.passkey-auth.svc.cluster.local/auth"
+    nginx.ingress.kubernetes.io/auth-signin: "https://auth.yourcompany.com"
+    nginx.ingress.kubernetes.io/auth-response-headers: "X-Auth-User,X-Auth-User-ID"
+
+    # SSL configuration
+    cert-manager.io/cluster-issuer: "letsencrypt-prod"
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+spec:
+  tls:
+  - hosts:
+    - app.yourcompany.com
+    secretName: your-app-tls
+  rules:
+  - host: app.yourcompany.com
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: your-app-service
+            port:
+              number: 80
+```
+
+## Step 5: Set Up Monitoring (Optional)
+
+### Health Checks
+
+The service includes health checks at `/health`. Configure monitoring:
+
+```yaml
+# Add to your monitoring stack
+- job_name: 'passkey-auth'
+  static_configs:
+  - targets: ['passkey-auth-service.passkey-auth.svc.cluster.local:80']
+  metrics_path: '/health'
+```
+
+### Log Aggregation
+
+Configure log forwarding to your logging system:
+
+```bash
+kubectl logs -f deployment/passkey-auth -n passkey-auth | your-log-forwarder
+```
+
+## Step 6: Backup Strategy
+
+### Database Backup
+
+Set up regular backups of the SQLite database:
+
+```bash
+# Create a backup cronjob
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: passkey-auth-backup
+  namespace: passkey-auth
+spec:
+  schedule: "0 2 * * *"  # Daily at 2 AM
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: backup
+            image: alpine
+            command:
+            - /bin/sh
+            - -c
+            - |
+              cp /data/passkey-auth.db /backup/passkey-auth-$(date +%Y%m%d).db
+              # Upload to your backup storage
+            volumeMounts:
+            - name: data
+              mountPath: /data
+            - name: backup
+              mountPath: /backup
+          restartPolicy: OnFailure
+          volumes:
+          - name: data
+            persistentVolumeClaim:
+              claimName: passkey-auth-storage
+          - name: backup
+            # Configure your backup storage volume
+```
+
+## Security Checklist
+
+- [ ] HTTPS enforced for all endpoints
+- [ ] Session secret is randomly generated and secure
+- [ ] CORS origins are specifically configured (not "*")
+- [ ] WebAuthn RP ID matches your domain exactly
+- [ ] Network policies restrict pod-to-pod communication
+- [ ] Regular security updates applied
+- [ ] Database backups are encrypted and tested
+- [ ] Access logs are monitored
+- [ ] Kubernetes RBAC is properly configured
+
+## Troubleshooting
+
+### Common Production Issues
+
+1. **WebAuthn Registration Fails**:
+   - Verify RP ID matches domain exactly
+   - Ensure HTTPS is properly configured
+   - Check browser developer console for errors
+
+2. **Auth Backend Returns 502**:
+   - Verify service is running: `kubectl get pods -n passkey-auth`
+   - Check service connectivity: `kubectl get svc -n passkey-auth`
+   - Review nginx ingress logs
+
+3. **Session Issues**:
+   - Verify session secret is consistent across restarts
+   - Check cookie domain settings
+   - Ensure persistent storage is working
+
+### Debug Commands
+
+```bash
+# Check service status
+kubectl get all -n passkey-auth
+
+# View logs
+kubectl logs -f deployment/passkey-auth -n passkey-auth
+
+# Test auth endpoint
+kubectl exec -it deployment/passkey-auth -n passkey-auth -- wget -O- http://localhost:8080/health
+
+# Check ingress
+kubectl describe ingress -n passkey-auth
+
+# Port forward for testing
+kubectl port-forward svc/passkey-auth-service 8080:80 -n passkey-auth
+```
+
+## Scaling Considerations
+
+### High Availability
+
+For high availability, consider:
+
+1. **Multiple Replicas**: Increase replica count in deployment
+2. **Session Storage**: Use Redis for shared session storage
+3. **Database**: Consider PostgreSQL for better concurrent access
+4. **Load Balancing**: Ensure proper session affinity
+
+### Performance Tuning
+
+1. **Resource Limits**: Adjust based on usage patterns
+2. **Database Optimization**: Regular VACUUM for SQLite
+3. **Caching**: Add caching layer for frequently accessed data
+
+## Updates and Maintenance
+
+### Rolling Updates
+
+```bash
+# Update the image
+kubectl set image deployment/passkey-auth passkey-auth=passkey-auth:v1.1.0 -n passkey-auth
+
+# Monitor rollout
+kubectl rollout status deployment/passkey-auth -n passkey-auth
+
+# Rollback if needed
+kubectl rollout undo deployment/passkey-auth -n passkey-auth
+```
+
+### Database Migrations
+
+For schema changes, implement migration scripts and run them during maintenance windows.
+
+---
+
+This production guide ensures a secure, reliable deployment of Passkey Auth in your Kubernetes environment.
@@ -0,0 +1,416 @@
+# 🔐 Passkey Auth for Kubernetes Nginx Ingress
+
+A WebAuthn-based passkey authentication provider that integrates seamlessly with Kubernetes nginx ingress controllers. This service provides secure, passwordless authentication using passkeys (FIDO2/WebAuthn) and acts as an auth backend for nginx ingress.
+
+## ✨ Features
+
+- **Pa2. **"User not found" during login**:
+   - Ensure user is registered and approved (if required)
+   - Check that email address matches exactly
+
+3. **WebAuthn errors**:dless Authentication**: Uses WebAuthn/FIDO2 passkeys for secure authentication
+- **Email-Based Access Control**: Users are identified by email addresses with configurable allowlists
+- **Nginx Ingress Integration**: Works as an auth backend using nginx `auth_request` directive
+- **User Management**: Admin interface for managing users and their approval status
+- **Access Control**: Configure allowed email addresses and approval requirements
+- **Kubernetes Native**: Designed specifically for Kubernetes deployment
+- **Persistent Storage**: Uses SQLite with persistent volumes for data storage
+- **Modern UI**: Clean, responsive web interface for user registration and management
+
+## 🏗️ Architecture
+
+```
+┌─────────────────┐    ┌──────────────────┐    ┌─────────────────┐
+│   User Browser  │    │  Nginx Ingress   │    │  Your App       │
+│                 │    │                  │    │                 │
+│  1. Request     │───▶│  2. Auth Check   │───▶│  4. Serve App   │
+│  4. Redirect    │◀───│  3. 401/302      │    │                 │
+└─────────────────┘    └──────────────────┘    └─────────────────┘
+                              │
+                              │ auth_request
+                              ▼
+                       ┌──────────────────┐
+                       │  Passkey Auth    │
+                       │                  │
+                       │  - WebAuthn      │
+                       │  - User Mgmt     │
+                       │  - Session Mgmt  │
+                       └──────────────────┘
+```
+
+## 🚀 Quick Start
+
+### Prerequisites
+
+- Kubernetes cluster with nginx ingress controller
+- Docker
+- kubectl configured to access your cluster
+
+### 1. Clone and Build
+
+```bash
+git clone <repository-url>
+cd passkey-auth
+
+# Build the Docker image
+./scripts/build.sh
+```
+
+### 2. Configure
+
+Edit `k8s/deployment.yaml` to update:
+
+```yaml
+# Update these values in the ConfigMap
+webauthn:
+  rp_id: "your-domain.com"           # Your domain
+  rp_origins:
+    - "https://your-domain.com"       # Your domain with protocol
+
+cors:
+  allowed_origins:
+    - "https://your-domain.com"       # Your domain with protocol
+
+auth:
+  session_secret: "your-secure-secret-key"  # Generate a secure random string
+```
+
+### 3. Deploy to Kubernetes
+
+```bash
+# Deploy the passkey auth service
+./scripts/deploy.sh
+
+# Verify deployment
+kubectl get pods -n passkey-auth
+kubectl logs -f deployment/passkey-auth -n passkey-auth
+```
+
+### 4. Configure Your App's Ingress
+
+Update your application's ingress to use passkey auth:
+
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: your-app-ingress
+  annotations:
+    # Auth backend - points to passkey auth service
+    nginx.ingress.kubernetes.io/auth-url: "http://passkey-auth-service.passkey-auth.svc.cluster.local/auth"
+
+    # Redirect unauthorized users to login page
+    nginx.ingress.kubernetes.io/auth-signin: "https://your-domain.com/auth"
+
+    # Pass user info to your app
+    nginx.ingress.kubernetes.io/auth-response-headers: "X-Auth-User,X-Auth-User-ID"
+spec:
+  rules:
+  - host: your-app.com
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: your-app-service
+            port:
+              number: 80
+```
+
+### 5. Create Ingress for Passkey Auth
+
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: passkey-auth-ingress
+  namespace: passkey-auth
+spec:
+  rules:
+  - host: your-domain.com
+    http:
+      paths:
+      - path: /auth
+        pathType: Prefix
+        backend:
+          service:
+            name: passkey-auth-service
+            port:
+              number: 80
+```
+
+Apply the ingress:
+
+```bash
+kubectl apply -f k8s/ingress-example.yaml
+```
+
+## 👥 User Management
+
+### Access the Admin Interface
+
+1. Navigate to `https://your-domain.com/auth` in your browser
+2. You'll see the admin dashboard with three tabs:
+   - **Register User**: Register new users with passkeys
+   - **Test Login**: Test authentication
+   - **Manage Users**: View and manage all users
+
+### User Registration Flow
+
+1. **Register**: Admin enters email address and display name
+2. **Email Validation**: System checks if email is in the allowlist (if configured)
+3. **Passkey Creation**: Browser prompts for passkey creation (TouchID, Windows Hello, etc.)
+4. **Approval**: If `require_approval` is enabled, admin must approve users manually
+5. **Authentication**: Users can now authenticate with their passkeys
+
+### User Approval Process
+
+When `require_approval` is enabled in the configuration:
+
+1. **New users register** but cannot authenticate until approved
+2. **Admin reviews pending users** in the "Manage Users" tab
+3. **Admin clicks "Approve"** next to pending users
+4. **Users can now authenticate** with their passkeys
+
+**To approve a user:**
+1. Navigate to the admin interface at `https://your-domain.com/auth`
+2. Click the "Manage Users" tab
+3. Find users with "Pending" status
+4. Click the "Approve" button next to the user
+5. Confirm the approval in the dialog
+
+**User Status Indicators:**
+- 🟢 **Approved**: User can authenticate
+- 🟡 **Pending**: User registered but needs approval
+
+### Configuration Options
+
+In `config.yaml` or environment variables:
+
+```yaml
+auth:
+  require_approval: true    # Require admin approval for new users
+  session_secret: "secret"  # Session encryption key
+  allowed_emails:           # Email allowlist (empty = allow all)
+    - "admin@company.com"
+    - "user@company.com"
+```
+
+Environment variable overrides:
+- `WEBAUTHN_RP_ID`: WebAuthn Relying Party ID (your domain)
+- `SESSION_SECRET`: Session encryption secret
+- `DATABASE_PATH`: SQLite database file path
+- `PORT`: Server port (default: 8080)
+- `ALLOWED_EMAILS`: Comma-separated list of allowed emails
+
+## 🔧 Development
+
+### Local Development
+
+1. **Install Go dependencies**:
+```bash
+go mod download
+```
+
+2. **Run locally**:
+```bash
+# Update config.yaml for local development
+go run main.go
+```
+
+3. **Access the interface**:
+```
+http://localhost:8080
+```
+
+### Project Structure
+
+```
+passkey-auth/
+├── main.go                 # Application entry point
+├── internal/
+│   ├── auth/               # WebAuthn implementation
+│   ├── config/             # Configuration management
+│   ├── database/           # SQLite database layer
+│   └── handlers/           # HTTP handlers
+├── web/                    # Static web files
+├── k8s/                    # Kubernetes manifests
+├── scripts/                # Deployment scripts
+└── config.yaml            # Configuration file
+```
+
+### API Endpoints
+
+| Endpoint | Method | Description |
+|----------|--------|-------------|
+| `/api/register/begin` | POST | Start passkey registration |
+| `/api/register/finish` | POST | Complete passkey registration |
+| `/api/login/begin` | POST | Start passkey authentication |
+| `/api/login/finish` | POST | Complete passkey authentication |
+| `/api/logout` | POST | Logout user |
+| `/auth` | GET | Nginx auth check endpoint |
+| `/api/users` | GET | List all users (admin) |
+| `/api/users` | POST | Create new user (admin) |
+| `/api/users/{id}` | PUT | Update user (approve/admin) |
+| `/api/users/{id}` | DELETE | Delete user (admin) |
+| `/health` | GET | Health check |
+
+## 🔒 Security Considerations
+
+### Production Deployment
+
+1. **HTTPS Only**: Always use HTTPS in production
+2. **Secure Session Secret**: Use a strong, random session secret
+3. **Domain Configuration**: Ensure `rp_id` matches your domain exactly
+4. **Network Security**: Use Kubernetes network policies to restrict access
+5. **Regular Backups**: Backup the SQLite database regularly
+
+### Session Configuration
+
+```yaml
+# Secure session configuration for production
+auth:
+  session_secret: "your-256-bit-random-key"  # Use a proper secret manager
+```
+
+### Database Security
+
+The SQLite database contains:
+- User information (email addresses, display names)
+- WebAuthn credentials (public keys, metadata)
+- No passwords or private keys are stored
+
+## 🔐 Email Access Control
+
+### Allowlist Configuration
+
+You can control who can register by configuring an email allowlist:
+
+```yaml
+# config.yaml
+auth:
+  allowed_emails:
+    - "admin@yourcompany.com"
+    - "engineering@yourcompany.com"
+    - "support@yourcompany.com"
+```
+
+Or via environment variable:
+```bash
+export ALLOWED_EMAILS="admin@company.com,user1@company.com,user2@company.com"
+```
+
+### Access Control Options
+
+1. **Open Registration** (allowed_emails is empty or not set):
+   - Any email address can register
+   - Suitable for internal/trusted environments
+
+2. **Allowlist Mode** (allowed_emails configured):
+   - Only specified email addresses can register
+   - Recommended for production environments
+
+3. **Combined with Approval**:
+   - Users must be in allowlist AND get admin approval
+   - Maximum security for sensitive applications
+
+## 📊 Monitoring
+
+### Health Checks
+
+The service exposes a health endpoint at `/health`:
+
+```bash
+curl http://passkey-auth-service.passkey-auth.svc.cluster.local/health
+```
+
+### Logs
+
+View application logs:
+
+```bash
+kubectl logs -f deployment/passkey-auth -n passkey-auth
+```
+
+### Metrics
+
+For production, consider adding metrics collection:
+- Authentication success/failure rates
+- User registration rates
+- Session duration statistics
+
+## 🐛 Troubleshooting
+
+### Common Issues
+
+1. **Docker build failures with SQLite CGO errors**:
+   - The Dockerfile uses Debian-based images (golang:1.21-bullseye) instead of Alpine
+   - This resolves musl vs glibc compatibility issues with go-sqlite3
+   - If you encounter `pread64` or `pwrite64` errors, ensure you're using a glibc-based image
+
+2. **WebAuthn encoding errors** (challenge not ArrayBuffer):
+   - The web interface includes base64url conversion functions
+   - Ensure you're using the included HTML file, not a custom frontend
+   - Binary WebAuthn data must be converted between base64url and ArrayBuffer
+
+3. **"User not found" during login**:
+   - Ensure user is registered and approved (if required)
+   - Check that username matches exactly
+
+4. **WebAuthn errors**:
+   - Verify `rp_id` matches your domain
+   - Ensure HTTPS is used (required for WebAuthn)
+   - Check browser support for WebAuthn
+
+5. **Auth backend not working**:
+   - Verify ingress annotations are correct
+   - Check that the auth service is accessible from nginx
+   - Review nginx ingress controller logs
+
+6. **Session issues**:
+   - Ensure session secret is consistent
+   - Check cookie settings (secure flag for HTTPS)
+   - Verify session storage is persistent
+
+### Debug Commands
+
+```bash
+# Check pod status
+kubectl get pods -n passkey-auth
+
+# View logs
+kubectl logs deployment/passkey-auth -n passkey-auth
+
+# Check service
+kubectl get svc -n passkey-auth
+
+# Test auth endpoint
+kubectl exec -it deployment/passkey-auth -n passkey-auth -- wget -O- http://localhost:8080/health
+
+# Port forward for local testing
+kubectl port-forward svc/passkey-auth-service 8080:80 -n passkey-auth
+```
+
+## 🤝 Contributing
+
+1. Fork the repository
+2. Create a feature branch
+3. Make your changes
+4. Add tests if applicable
+5. Submit a pull request
+
+## 📄 License
+
+This project is licensed under the MIT License - see the LICENSE file for details.
+
+## 🙏 Acknowledgments
+
+- [go-webauthn](https://github.com/go-webauthn/webauthn) - WebAuthn library for Go
+- [Gorilla](https://github.com/gorilla) - HTTP utilities for Go
+- WebAuthn/FIDO2 specifications
+- Kubernetes and nginx ingress controller teams
+
+---
+
+For support or questions, please create an issue in the repository.
@@ -0,0 +1,62 @@
+# Development Configuration
+# Copy this file to config.yaml and modify for your environment
+
+server:
+  port: "8080"
+  host: "0.0.0.0"
+
+webauthn:
+  # Display name shown during passkey registration
+  rp_display_name: "Passkey Auth - Development"
+
+  # Must match your domain exactly (without protocol)
+  # For local development, use "localhost"
+  # For production, use your actual domain like "auth.example.com"
+  rp_id: "localhost"
+
+  # List of allowed origins (with protocol)
+  # Must include all URLs where users will access the auth interface
+  rp_origins:
+    - "http://localhost:8080"
+    # Add your production URLs:
+    # - "https://auth.example.com"
+    # - "https://example.com"
+
+database:
+  # SQLite database file path
+  # In Kubernetes, this should be in a persistent volume
+  path: "passkey-auth.db"
+
+cors:
+  # Allowed origins for CORS
+  # In production, be specific about allowed origins for security
+  allowed_origins:
+    - "*"  # Only use "*" for development
+    # Production example:
+    # - "https://auth.example.com"
+    # - "https://admin.example.com"
+
+auth:
+  # Session encryption secret - MUST be changed in production!
+  # Generate with: openssl rand -base64 32
+  session_secret: "change-me-in-production"
+
+  # Whether new users need admin approval before they can authenticate
+  # Set to false to allow automatic approval for trusted environments
+  require_approval: true
+
+  # Email allowlist - list of email addresses allowed to register
+  # Leave empty to allow any email address (not recommended for production)
+  allowed_emails:
+    # Example emails (uncomment and modify as needed):
+    # - "admin@yourcompany.com"
+    # - "user1@yourcompany.com"
+    # - "user2@yourcompany.com"
+
+# Environment-specific overrides can be set via environment variables:
+# - PORT: Server port
+# - HOST: Server host
+# - WEBAUTHN_RP_ID: WebAuthn Relying Party ID
+# - DATABASE_PATH: Database file path
+# - SESSION_SECRET: Session encryption secret
+# - ALLOWED_EMAILS: Comma-separated list of allowed emails
@@ -0,0 +1,24 @@
+server:
+  port: "8080"
+  host: "0.0.0.0"
+
+webauthn:
+  rp_display_name: "Passkey Auth"
+  rp_id: "localhost"
+  rp_origins:
+    - "http://localhost:8080"
+
+database:
+  path: "passkey-auth.db"
+
+cors:
+  allowed_origins:
+    - "*"
+
+auth:
+  session_secret: "change-me-in-production"
+  require_approval: true
+  # Email allowlist - leave empty to allow any email
+  allowed_emails:
+    # - "admin@example.com"
+    # - "user@example.com"
@@ -0,0 +1,20 @@
+version: '3.8'
+
+services:
+  passkey-auth:
+    build: .
+    ports:
+      - "8080:8080"
+    environment:
+      - WEBAUTHN_RP_ID=localhost
+      - DATABASE_PATH=/data/passkey-auth.db
+      - SESSION_SECRET=dev-secret-change-in-production
+    volumes:
+      - ./data:/data
+      - ./config.yaml:/root/config.yaml
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
@@ -0,0 +1,26 @@
+module passkey-auth
+
+go 1.21
+
+require (
+	github.com/go-webauthn/webauthn v0.10.2
+	github.com/gorilla/mux v1.8.1
+	github.com/gorilla/sessions v1.2.2
+	github.com/mattn/go-sqlite3 v1.14.18
+	github.com/rs/cors v1.10.1
+	github.com/sirupsen/logrus v1.9.3
+	gopkg.in/yaml.v2 v2.4.0
+)
+
+require (
+	github.com/fxamacker/cbor/v2 v2.6.0 // indirect
+	github.com/go-webauthn/x v0.1.9 // indirect
+	github.com/golang-jwt/jwt/v5 v5.2.1 // indirect
+	github.com/google/go-tpm v0.9.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/gorilla/securecookie v1.1.2 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
+	golang.org/x/crypto v0.21.0 // indirect
+	golang.org/x/sys v0.18.0 // indirect
+)
@@ -0,0 +1,51 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fxamacker/cbor/v2 v2.6.0 h1:sU6J2usfADwWlYDAFhZBQ6TnLFBHxgesMrQfQgk1tWA=
+github.com/fxamacker/cbor/v2 v2.6.0/go.mod h1:pxXPTn3joSm21Gbwsv0w9OSA2y1HFR9qXEeXQVeNoDQ=
+github.com/go-webauthn/webauthn v0.10.2 h1:OG7B+DyuTytrEPFmTX503K77fqs3HDK/0Iv+z8UYbq4=
+github.com/go-webauthn/webauthn v0.10.2/go.mod h1:Gd1IDsGAybuvK1NkwUTLbGmeksxuRJjVN2PE/xsPxHs=
+github.com/go-webauthn/x v0.1.9 h1:v1oeLmoaa+gPOaZqUdDentu6Rl7HkSSsmOT6gxEQHhE=
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@@ -0,0 +1,139 @@
+package auth
+
+import (
+	"net/http"
+
+	"passkey-auth/internal/config"
+	"passkey-auth/internal/database"
+
+	"github.com/go-webauthn/webauthn/protocol"
+	"github.com/go-webauthn/webauthn/webauthn"
+)
+
+type WebAuthn struct {
+	web *webauthn.WebAuthn
+	db  *database.DB
+}
+
+// WebAuthnUser implements the webauthn.User interface
+type WebAuthnUser struct {
+	user        *database.User
+	credentials []*database.Credential
+}
+
+func (u *WebAuthnUser) SetUser(user *database.User) {
+	u.user = user
+}
+
+func (u *WebAuthnUser) GetUser() *database.User {
+	return u.user
+}
+
+func (u *WebAuthnUser) WebAuthnID() []byte {
+	return []byte(u.user.Email)
+}
+
+func (u *WebAuthnUser) WebAuthnName() string {
+	return u.user.Email
+}
+
+func (u *WebAuthnUser) WebAuthnDisplayName() string {
+	return u.user.DisplayName
+}
+
+func (u *WebAuthnUser) WebAuthnIcon() string {
+	return ""
+}
+
+func (u *WebAuthnUser) WebAuthnCredentials() []webauthn.Credential {
+	var creds []webauthn.Credential
+	for _, dbCred := range u.credentials {
+		creds = append(creds, webauthn.Credential{
+			ID:              dbCred.ID,
+			PublicKey:       dbCred.PublicKey,
+			AttestationType: dbCred.AttestationType,
+			Authenticator: webauthn.Authenticator{
+				AAGUID:       dbCred.AAGUID,
+				SignCount:    dbCred.SignCount,
+				CloneWarning: dbCred.CloneWarning,
+			},
+		})
+	}
+	return creds
+}
+
+func NewWebAuthn(cfg *config.Config) (*WebAuthn, error) {
+	wconfig := &webauthn.Config{
+		RPDisplayName: cfg.WebAuthn.RPDisplayName,
+		RPID:          cfg.WebAuthn.RPID,
+		RPOrigins:     cfg.WebAuthn.RPOrigins,
+	}
+
+	web, err := webauthn.New(wconfig)
+	if err != nil {
+		return nil, err
+	}
+
+	return &WebAuthn{
+		web: web,
+	}, nil
+}
+
+func (wa *WebAuthn) SetDB(db *database.DB) {
+	wa.db = db
+}
+
+func (wa *WebAuthn) GetUserByEmail(email string) (*WebAuthnUser, error) {
+	user, err := wa.db.GetUserByEmail(email)
+	if err != nil {
+		return nil, err
+	}
+
+	credentials, err := wa.db.GetCredentialsByUserID(user.ID)
+	if err != nil {
+		return nil, err
+	}
+
+	return &WebAuthnUser{
+		user:        user,
+		credentials: credentials,
+	}, nil
+}
+
+func (wa *WebAuthn) BeginRegistration(user *WebAuthnUser) (*protocol.CredentialCreation, *webauthn.SessionData, error) {
+	creation, sessionData, err := wa.web.BeginRegistration(user)
+	return creation, sessionData, err
+}
+
+func (wa *WebAuthn) FinishRegistration(user *WebAuthnUser, sessionData webauthn.SessionData, response *http.Request) (*webauthn.Credential, error) {
+	credential, err := wa.web.FinishRegistration(user, sessionData, response)
+	return credential, err
+}
+
+func (wa *WebAuthn) BeginLogin(user *WebAuthnUser) (*protocol.CredentialAssertion, *webauthn.SessionData, error) {
+	assertion, sessionData, err := wa.web.BeginLogin(user)
+	return assertion, sessionData, err
+}
+
+func (wa *WebAuthn) FinishLogin(user *WebAuthnUser, sessionData webauthn.SessionData, response *http.Request) (*webauthn.Credential, error) {
+	credential, err := wa.web.FinishLogin(user, sessionData, response)
+	return credential, err
+}
+
+func (wa *WebAuthn) SaveCredential(userID int, cred *webauthn.Credential) error {
+	dbCred := &database.Credential{
+		ID:              cred.ID,
+		UserID:          userID,
+		PublicKey:       cred.PublicKey,
+		AttestationType: cred.AttestationType,
+		AAGUID:          cred.Authenticator.AAGUID,
+		SignCount:       cred.Authenticator.SignCount,
+		CloneWarning:    cred.Authenticator.CloneWarning,
+	}
+
+	return wa.db.SaveCredential(dbCred)
+}
+
+func (wa *WebAuthn) UpdateCredentialSignCount(credID []byte, signCount uint32) error {
+	return wa.db.UpdateCredentialSignCount(credID, signCount)
+}
@@ -0,0 +1,129 @@
+package config
+
+import (
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"gopkg.in/yaml.v2"
+)
+
+type Config struct {
+	Server   ServerConfig   `yaml:"server"`
+	WebAuthn WebAuthnConfig `yaml:"webauthn"`
+	Database DatabaseConfig `yaml:"database"`
+	CORS     CORSConfig     `yaml:"cors"`
+	Auth     AuthConfig     `yaml:"auth"`
+}
+
+type ServerConfig struct {
+	Port string `yaml:"port"`
+	Host string `yaml:"host"`
+}
+
+type WebAuthnConfig struct {
+	RPDisplayName string   `yaml:"rp_display_name"`
+	RPID          string   `yaml:"rp_id"`
+	RPOrigins     []string `yaml:"rp_origins"`
+}
+
+type DatabaseConfig struct {
+	Path string `yaml:"path"`
+}
+
+type CORSConfig struct {
+	AllowedOrigins []string `yaml:"allowed_origins"`
+}
+
+type AuthConfig struct {
+	SessionSecret   string   `yaml:"session_secret"`
+	RequireApproval bool     `yaml:"require_approval"`
+	AllowedEmails   []string `yaml:"allowed_emails"`
+}
+
+func Load() (*Config, error) {
+	configPath := os.Getenv("CONFIG_PATH")
+	if configPath == "" {
+		configPath = "config.yaml"
+	}
+
+	// Set defaults
+	config := &Config{
+		Server: ServerConfig{
+			Port: "8080",
+			Host: "0.0.0.0",
+		},
+		WebAuthn: WebAuthnConfig{
+			RPDisplayName: "Passkey Auth",
+			RPID:          "localhost",
+			RPOrigins:     []string{"http://localhost:8080"},
+		},
+		Database: DatabaseConfig{
+			Path: "passkey-auth.db",
+		},
+		CORS: CORSConfig{
+			AllowedOrigins: []string{"*"},
+		},
+		Auth: AuthConfig{
+			SessionSecret:   "change-me-in-production",
+			RequireApproval: true,
+			AllowedEmails:   []string{}, // Empty means no email restrictions
+		},
+	}
+
+	// Load from file if it exists
+	if _, err := os.Stat(configPath); err == nil {
+		data, err := ioutil.ReadFile(configPath)
+		if err != nil {
+			return nil, err
+		}
+
+		if err := yaml.Unmarshal(data, config); err != nil {
+			return nil, err
+		}
+	}
+
+	// Override with environment variables
+	if port := os.Getenv("PORT"); port != "" {
+		config.Server.Port = port
+	}
+	if host := os.Getenv("HOST"); host != "" {
+		config.Server.Host = host
+	}
+	if rpid := os.Getenv("WEBAUTHN_RP_ID"); rpid != "" {
+		config.WebAuthn.RPID = rpid
+	}
+	if dbPath := os.Getenv("DATABASE_PATH"); dbPath != "" {
+		config.Database.Path = dbPath
+	}
+	if secret := os.Getenv("SESSION_SECRET"); secret != "" {
+		config.Auth.SessionSecret = secret
+	}
+	if allowedEmails := os.Getenv("ALLOWED_EMAILS"); allowedEmails != "" {
+		config.Auth.AllowedEmails = strings.Split(allowedEmails, ",")
+		// Trim whitespace from emails
+		for i, email := range config.Auth.AllowedEmails {
+			config.Auth.AllowedEmails[i] = strings.TrimSpace(email)
+		}
+	}
+
+	return config, nil
+}
+
+// IsEmailAllowed checks if an email address is in the allowed list
+// Returns true if the allowlist is empty (no restrictions) or if the email is in the list
+func (c *Config) IsEmailAllowed(email string) bool {
+	// If no allowed emails specified, allow all
+	if len(c.Auth.AllowedEmails) == 0 {
+		return true
+	}
+
+	// Check if email is in the allowed list
+	for _, allowedEmail := range c.Auth.AllowedEmails {
+		if email == allowedEmail {
+			return true
+		}
+	}
+
+	return false
+}
@@ -0,0 +1,202 @@
+package database
+
+import (
+	"database/sql"
+	"time"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type DB struct {
+	conn *sql.DB
+}
+
+type User struct {
+	ID          int       `json:"id"`
+	Email       string    `json:"email"`
+	DisplayName string    `json:"display_name"`
+	Approved    bool      `json:"approved"`
+	CreatedAt   time.Time `json:"created_at"`
+}
+
+type Credential struct {
+	ID              []byte    `json:"id"`
+	UserID          int       `json:"user_id"`
+	PublicKey       []byte    `json:"public_key"`
+	AttestationType string    `json:"attestation_type"`
+	AAGUID          []byte    `json:"aaguid"`
+	SignCount       uint32    `json:"sign_count"`
+	CloneWarning    bool      `json:"clone_warning"`
+	CreatedAt       time.Time `json:"created_at"`
+}
+
+func New(dbPath string) (*DB, error) {
+	conn, err := sql.Open("sqlite3", dbPath+"?_fk=1")
+	if err != nil {
+		return nil, err
+	}
+
+	db := &DB{conn: conn}
+	if err := db.migrate(); err != nil {
+		return nil, err
+	}
+
+	return db, nil
+}
+
+func (db *DB) Close() error {
+	return db.conn.Close()
+}
+
+func (db *DB) migrate() error {
+	queries := []string{
+		`CREATE TABLE IF NOT EXISTS users (
+			id INTEGER PRIMARY KEY AUTOINCREMENT,
+			email TEXT UNIQUE NOT NULL,
+			display_name TEXT NOT NULL,
+			approved BOOLEAN DEFAULT FALSE,
+			created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+		)`,
+		`CREATE TABLE IF NOT EXISTS credentials (
+			id BLOB PRIMARY KEY,
+			user_id INTEGER NOT NULL,
+			public_key BLOB NOT NULL,
+			attestation_type TEXT NOT NULL,
+			aaguid BLOB,
+			sign_count INTEGER DEFAULT 0,
+			clone_warning BOOLEAN DEFAULT FALSE,
+			created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+			FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+		)`,
+		`CREATE INDEX IF NOT EXISTS idx_users_email ON users(email)`,
+		`CREATE INDEX IF NOT EXISTS idx_credentials_user_id ON credentials(user_id)`,
+	}
+
+	for _, query := range queries {
+		if _, err := db.conn.Exec(query); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (db *DB) CreateUser(email, displayName string) (*User, error) {
+	result, err := db.conn.Exec(
+		"INSERT INTO users (email, display_name) VALUES (?, ?)",
+		email, displayName,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	id, err := result.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+
+	return db.GetUser(int(id))
+}
+
+func (db *DB) GetUser(id int) (*User, error) {
+	var user User
+	err := db.conn.QueryRow(
+		"SELECT id, email, display_name, approved, created_at FROM users WHERE id = ?",
+		id,
+	).Scan(&user.ID, &user.Email, &user.DisplayName, &user.Approved, &user.CreatedAt)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &user, nil
+}
+
+func (db *DB) GetUserByEmail(email string) (*User, error) {
+	var user User
+	err := db.conn.QueryRow(
+		"SELECT id, email, display_name, approved, created_at FROM users WHERE email = ?",
+		email,
+	).Scan(&user.ID, &user.Email, &user.DisplayName, &user.Approved, &user.CreatedAt)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &user, nil
+}
+
+func (db *DB) ListUsers() ([]*User, error) {
+	rows, err := db.conn.Query(
+		"SELECT id, email, display_name, approved, created_at FROM users ORDER BY created_at DESC",
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var users []*User
+	for rows.Next() {
+		var user User
+		if err := rows.Scan(&user.ID, &user.Email, &user.DisplayName, &user.Approved, &user.CreatedAt); err != nil {
+			return nil, err
+		}
+		users = append(users, &user)
+	}
+
+	return users, nil
+}
+
+func (db *DB) ApproveUser(id int) error {
+	_, err := db.conn.Exec("UPDATE users SET approved = TRUE WHERE id = ?", id)
+	return err
+}
+
+func (db *DB) DeleteUser(id int) error {
+	_, err := db.conn.Exec("DELETE FROM users WHERE id = ?", id)
+	return err
+}
+
+func (db *DB) SaveCredential(cred *Credential) error {
+	_, err := db.conn.Exec(
+		`INSERT INTO credentials (id, user_id, public_key, attestation_type, aaguid, sign_count, clone_warning)
+		 VALUES (?, ?, ?, ?, ?, ?, ?)`,
+		cred.ID, cred.UserID, cred.PublicKey, cred.AttestationType,
+		cred.AAGUID, cred.SignCount, cred.CloneWarning,
+	)
+	return err
+}
+
+func (db *DB) GetCredentialsByUserID(userID int) ([]*Credential, error) {
+	rows, err := db.conn.Query(
+		`SELECT id, user_id, public_key, attestation_type, aaguid, sign_count, clone_warning, created_at
+		 FROM credentials WHERE user_id = ?`,
+		userID,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var credentials []*Credential
+	for rows.Next() {
+		var cred Credential
+		if err := rows.Scan(
+			&cred.ID, &cred.UserID, &cred.PublicKey, &cred.AttestationType,
+			&cred.AAGUID, &cred.SignCount, &cred.CloneWarning, &cred.CreatedAt,
+		); err != nil {
+			return nil, err
+		}
+		credentials = append(credentials, &cred)
+	}
+
+	return credentials, nil
+}
+
+func (db *DB) UpdateCredentialSignCount(credID []byte, signCount uint32) error {
+	_, err := db.conn.Exec(
+		"UPDATE credentials SET sign_count = ? WHERE id = ?",
+		signCount, credID,
+	)
+	return err
+}
@@ -0,0 +1,465 @@
+package handlers
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/go-webauthn/webauthn/webauthn"
+	"github.com/gorilla/mux"
+	"github.com/gorilla/sessions"
+	"github.com/sirupsen/logrus"
+
+	"passkey-auth/internal/auth"
+	"passkey-auth/internal/config"
+	"passkey-auth/internal/database"
+)
+
+type Handlers struct {
+	db       *database.DB
+	webAuthn *auth.WebAuthn
+	config   *config.Config
+	store    *sessions.CookieStore
+}
+
+func New(db *database.DB, webAuthn *auth.WebAuthn, config *config.Config) *Handlers {
+	webAuthn.SetDB(db)
+
+	store := sessions.NewCookieStore([]byte(config.Auth.SessionSecret))
+	store.Options = &sessions.Options{
+		Path:     "/",
+		MaxAge:   86400 * 7, // 7 days
+		HttpOnly: true,
+		Secure:   false, // Set to true in production with HTTPS
+		SameSite: http.SameSiteLaxMode,
+	}
+
+	return &Handlers{
+		db:       db,
+		webAuthn: webAuthn,
+		config:   config,
+		store:    store,
+	}
+}
+
+func (h *Handlers) writeError(w http.ResponseWriter, message string, code int) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(code)
+	json.NewEncoder(w).Encode(map[string]string{"error": message})
+}
+
+func (h *Handlers) writeJSON(w http.ResponseWriter, data interface{}) {
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(data)
+}
+
+// BeginRegistration starts the passkey registration process
+func (h *Handlers) BeginRegistration(w http.ResponseWriter, r *http.Request) {
+	var req struct {
+		Email       string `json:"email"`
+		DisplayName string `json:"display_name"`
+	}
+
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		h.writeError(w, "Invalid request body", http.StatusBadRequest)
+		return
+	}
+
+	if req.Email == "" || req.DisplayName == "" {
+		h.writeError(w, "Email and display name are required", http.StatusBadRequest)
+		return
+	}
+
+	// Check if email is allowed
+	if !h.config.IsEmailAllowed(req.Email) {
+		h.writeError(w, "Email address not allowed", http.StatusForbidden)
+		return
+	}
+
+	// Check if user already exists
+	existingUser, err := h.db.GetUserByEmail(req.Email)
+	if err == nil && existingUser != nil {
+		h.writeError(w, "User already exists", http.StatusConflict)
+		return
+	}
+
+	// Create new user
+	user, err := h.db.CreateUser(req.Email, req.DisplayName)
+	if err != nil {
+		logrus.Errorf("Failed to create user: %v", err)
+		h.writeError(w, "Failed to create user", http.StatusInternalServerError)
+		return
+	}
+
+	webAuthnUser := &auth.WebAuthnUser{}
+	webAuthnUser.SetUser(user)
+
+	options, sessionData, err := h.webAuthn.BeginRegistration(webAuthnUser)
+	if err != nil {
+		logrus.Errorf("Failed to begin registration: %v", err)
+		h.writeError(w, "Failed to begin registration", http.StatusInternalServerError)
+		return
+	}
+
+	// Store session data
+	session, _ := h.store.Get(r, "webauthn-session")
+	session.Values["challenge"] = sessionData.Challenge
+	session.Values["user_id"] = user.ID
+	session.Save(r, w)
+
+	// Debug: log the options structure
+	logrus.Debugf("WebAuthn options: %+v", options)
+	logrus.Debugf("Challenge type: %T", options.Response.Challenge)
+	logrus.Debugf("Challenge value: %v", options.Response.Challenge)
+	logrus.Debugf("User ID type: %T", options.Response.User.ID)
+	logrus.Debugf("User ID value: %v", options.Response.User.ID)
+
+	h.writeJSON(w, options)
+}
+
+// FinishRegistration completes the passkey registration process
+func (h *Handlers) FinishRegistration(w http.ResponseWriter, r *http.Request) {
+	session, _ := h.store.Get(r, "webauthn-session")
+
+	userID, ok := session.Values["user_id"].(int)
+	if !ok {
+		h.writeError(w, "Invalid session", http.StatusBadRequest)
+		return
+	}
+
+	challenge, ok := session.Values["challenge"].(string)
+	if !ok {
+		h.writeError(w, "Invalid session", http.StatusBadRequest)
+		return
+	}
+
+	// Read and log the request body for debugging
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		h.writeError(w, "Failed to read request body", http.StatusBadRequest)
+		return
+	}
+	logrus.Debugf("Received credential response body: %s", string(body))
+
+	// Create a new reader from the body for the WebAuthn library
+	r.Body = io.NopCloser(strings.NewReader(string(body)))
+
+	user, err := h.db.GetUser(userID)
+	if err != nil {
+		h.writeError(w, "User not found", http.StatusNotFound)
+		return
+	}
+
+	webAuthnUser := &auth.WebAuthnUser{}
+	webAuthnUser.SetUser(user)
+
+	sessionData := webauthn.SessionData{
+		Challenge: challenge,
+		UserID:    webAuthnUser.WebAuthnID(),
+	}
+
+	// Log the request details for debugging
+	logrus.Debugf("Finishing registration for user: %s", user.Email)
+	logrus.Debugf("Session challenge: %s", challenge)
+	logrus.Debugf("Session user ID: %v", webAuthnUser.WebAuthnID())
+
+	credential, err := h.webAuthn.FinishRegistration(webAuthnUser, sessionData, r)
+	if err != nil {
+		logrus.Errorf("Failed to finish registration: %v", err)
+		h.writeError(w, "Failed to finish registration", http.StatusInternalServerError)
+		return
+	}
+
+	// Save credential to database
+	if err := h.webAuthn.SaveCredential(user.ID, credential); err != nil {
+		logrus.Errorf("Failed to save credential: %v", err)
+		h.writeError(w, "Failed to save credential", http.StatusInternalServerError)
+		return
+	}
+
+	// Clear session
+	session.Values["challenge"] = nil
+	session.Values["user_id"] = nil
+	session.Save(r, w)
+
+	h.writeJSON(w, map[string]string{"status": "success"})
+}
+
+// BeginLogin starts the passkey authentication process
+func (h *Handlers) BeginLogin(w http.ResponseWriter, r *http.Request) {
+	var req struct {
+		Email string `json:"email"`
+	}
+
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		h.writeError(w, "Invalid request body", http.StatusBadRequest)
+		return
+	}
+
+	webAuthnUser, err := h.webAuthn.GetUserByEmail(req.Email)
+	if err != nil {
+		h.writeError(w, "User not found", http.StatusNotFound)
+		return
+	}
+
+	// Check if user is approved (if required)
+	if h.config.Auth.RequireApproval && !webAuthnUser.GetUser().Approved {
+		h.writeError(w, "User not approved", http.StatusForbidden)
+		return
+	}
+
+	options, sessionData, err := h.webAuthn.BeginLogin(webAuthnUser)
+	if err != nil {
+		logrus.Errorf("Failed to begin login: %v", err)
+		h.writeError(w, "Failed to begin login", http.StatusInternalServerError)
+		return
+	}
+
+	// Debug: log the login options structure
+	logrus.Debugf("Login options: %+v", options)
+	logrus.Debugf("Login challenge type: %T", options.Response.Challenge)
+	logrus.Debugf("Login challenge value: %v", options.Response.Challenge)
+	if len(options.Response.AllowedCredentials) > 0 {
+		logrus.Debugf("AllowedCredentials count: %d", len(options.Response.AllowedCredentials))
+		for i, cred := range options.Response.AllowedCredentials {
+			logrus.Debugf("Credential %d ID type: %T", i, cred.CredentialID)
+			logrus.Debugf("Credential %d ID value: %v", i, cred.CredentialID)
+		}
+	}
+
+	// Store session data
+	session, _ := h.store.Get(r, "webauthn-session")
+	session.Values["challenge"] = sessionData.Challenge
+	session.Values["user_id"] = webAuthnUser.GetUser().ID
+	session.Save(r, w)
+
+	h.writeJSON(w, options)
+}
+
+// FinishLogin completes the passkey authentication process
+func (h *Handlers) FinishLogin(w http.ResponseWriter, r *http.Request) {
+	session, _ := h.store.Get(r, "webauthn-session")
+
+	userID, ok := session.Values["user_id"].(int)
+	if !ok {
+		h.writeError(w, "Invalid session", http.StatusBadRequest)
+		return
+	}
+
+	challenge, ok := session.Values["challenge"].(string)
+	if !ok {
+		h.writeError(w, "Invalid session", http.StatusBadRequest)
+		return
+	}
+
+	user, err := h.db.GetUser(userID)
+	if err != nil {
+		h.writeError(w, "User not found", http.StatusNotFound)
+		return
+	}
+
+	webAuthnUser, err := h.webAuthn.GetUserByEmail(user.Email)
+	if err != nil {
+		h.writeError(w, "User not found", http.StatusNotFound)
+		return
+	}
+
+	sessionData := webauthn.SessionData{
+		Challenge: challenge,
+		UserID:    webAuthnUser.WebAuthnID(),
+	}
+
+	credential, err := h.webAuthn.FinishLogin(webAuthnUser, sessionData, r)
+	if err != nil {
+		logrus.Errorf("Failed to finish login: %v", err)
+		h.writeError(w, "Authentication failed", http.StatusUnauthorized)
+		return
+	}
+
+	// Update credential sign count
+	if err := h.webAuthn.UpdateCredentialSignCount(credential.ID, credential.Authenticator.SignCount); err != nil {
+		logrus.Errorf("Failed to update sign count: %v", err)
+	}
+
+	// Set authenticated session
+	authSession, _ := h.store.Get(r, "auth-session")
+	authSession.Values["authenticated"] = true
+	authSession.Values["user_id"] = user.ID
+	authSession.Values["user_email"] = user.Email
+	authSession.Save(r, w)
+
+	// Clear webauthn session
+	session.Values["challenge"] = nil
+	session.Values["user_id"] = nil
+	session.Save(r, w)
+
+	h.writeJSON(w, map[string]interface{}{
+		"status": "success",
+		"user": map[string]interface{}{
+			"id":           user.ID,
+			"email":        user.Email,
+			"display_name": user.DisplayName,
+		},
+	})
+}
+
+// Logout clears the authentication session
+func (h *Handlers) Logout(w http.ResponseWriter, r *http.Request) {
+	session, _ := h.store.Get(r, "auth-session")
+	session.Values["authenticated"] = false
+	session.Values["user_id"] = nil
+	session.Values["user_email"] = nil
+	session.Options.MaxAge = -1
+	session.Save(r, w)
+
+	h.writeJSON(w, map[string]string{"status": "success"})
+}
+
+// AuthCheck implements the nginx auth_request protocol
+func (h *Handlers) AuthCheck(w http.ResponseWriter, r *http.Request) {
+	session, _ := h.store.Get(r, "auth-session")
+
+	authenticated, ok := session.Values["authenticated"].(bool)
+	if !ok || !authenticated {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	// Optional: Add user info to response headers
+	if userID, ok := session.Values["user_id"].(int); ok {
+		w.Header().Set("X-Auth-User-ID", strconv.Itoa(userID))
+	}
+	if userEmail, ok := session.Values["user_email"].(string); ok {
+		w.Header().Set("X-Auth-User", userEmail)
+	}
+
+	w.WriteHeader(http.StatusOK)
+}
+
+// Admin endpoints
+
+// ListUsers returns all users (admin endpoint)
+func (h *Handlers) ListUsers(w http.ResponseWriter, r *http.Request) {
+	// TODO: Add admin authentication check
+	users, err := h.db.ListUsers()
+	if err != nil {
+		logrus.Errorf("Failed to list users: %v", err)
+		h.writeError(w, "Failed to list users", http.StatusInternalServerError)
+		return
+	}
+
+	h.writeJSON(w, users)
+}
+
+// CreateUser creates a new user (admin endpoint)
+func (h *Handlers) CreateUser(w http.ResponseWriter, r *http.Request) {
+	// TODO: Add admin authentication check
+	var req struct {
+		Email       string `json:"email"`
+		DisplayName string `json:"display_name"`
+		Approved    bool   `json:"approved"`
+	}
+
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		h.writeError(w, "Invalid request body", http.StatusBadRequest)
+		return
+	}
+
+	// Check if email is allowed
+	if !h.config.IsEmailAllowed(req.Email) {
+		h.writeError(w, "Email address not allowed", http.StatusForbidden)
+		return
+	}
+
+	user, err := h.db.CreateUser(req.Email, req.DisplayName)
+	if err != nil {
+		if strings.Contains(err.Error(), "UNIQUE constraint failed") {
+			h.writeError(w, "User already exists", http.StatusConflict)
+			return
+		}
+		logrus.Errorf("Failed to create user: %v", err)
+		h.writeError(w, "Failed to create user", http.StatusInternalServerError)
+		return
+	}
+
+	if req.Approved {
+		if err := h.db.ApproveUser(user.ID); err != nil {
+			logrus.Errorf("Failed to approve user: %v", err)
+		}
+	}
+
+	h.writeJSON(w, user)
+}
+
+// UpdateUser updates a user (admin endpoint)
+func (h *Handlers) UpdateUser(w http.ResponseWriter, r *http.Request) {
+	// TODO: Add admin authentication check
+	vars := mux.Vars(r)
+	idStr, ok := vars["id"]
+	if !ok {
+		h.writeError(w, "User ID required", http.StatusBadRequest)
+		return
+	}
+
+	id, err := strconv.Atoi(idStr)
+	if err != nil {
+		h.writeError(w, "Invalid user ID", http.StatusBadRequest)
+		return
+	}
+
+	var req struct {
+		Approved *bool `json:"approved"`
+	}
+
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		h.writeError(w, "Invalid request body", http.StatusBadRequest)
+		return
+	}
+
+	// Get existing user
+	user, err := h.db.GetUser(id)
+	if err != nil {
+		h.writeError(w, "User not found", http.StatusNotFound)
+		return
+	}
+
+	// Update approval status if provided
+	if req.Approved != nil && *req.Approved {
+		if err := h.db.ApproveUser(id); err != nil {
+			logrus.Errorf("Failed to approve user: %v", err)
+			h.writeError(w, "Failed to approve user", http.StatusInternalServerError)
+			return
+		}
+		user.Approved = true
+		logrus.Infof("User approved: %s", user.Email)
+	}
+
+	h.writeJSON(w, user)
+}
+
+// DeleteUser deletes a user (admin endpoint)
+func (h *Handlers) DeleteUser(w http.ResponseWriter, r *http.Request) {
+	// TODO: Add admin authentication check
+	vars := mux.Vars(r)
+	idStr, ok := vars["id"]
+	if !ok {
+		h.writeError(w, "User ID required", http.StatusBadRequest)
+		return
+	}
+
+	id, err := strconv.Atoi(idStr)
+	if err != nil {
+		h.writeError(w, "Invalid user ID", http.StatusBadRequest)
+		return
+	}
+
+	if err := h.db.DeleteUser(id); err != nil {
+		logrus.Errorf("Failed to delete user: %v", err)
+		h.writeError(w, "Failed to delete user", http.StatusInternalServerError)
+		return
+	}
+
+	h.writeJSON(w, map[string]string{"status": "success"})
+}
@@ -0,0 +1,118 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: passkey-auth-config
+  namespace: passkey-auth
+data:
+  config.yaml: |
+    server:
+      port: "8080"
+      host: "0.0.0.0"
+
+    webauthn:
+      rp_display_name: "Passkey Auth"
+      rp_id: "your-domain.com"
+      rp_origins:
+        - "https://your-domain.com"
+
+    database:
+      path: "/data/passkey-auth.db"
+
+    cors:
+      allowed_origins:
+        - "https://your-domain.com"
+
+    auth:
+      session_secret: "your-session-secret-change-me"
+      require_approval: true
+
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: passkey-auth-storage
+  namespace: passkey-auth
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: passkey-auth
+  namespace: passkey-auth
+  labels:
+    app: passkey-auth
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: passkey-auth
+  template:
+    metadata:
+      labels:
+        app: passkey-auth
+    spec:
+      containers:
+      - name: passkey-auth
+        image: passkey-auth:latest
+        ports:
+        - containerPort: 8080
+        env:
+        - name: CONFIG_PATH
+          value: "/config/config.yaml"
+        - name: DATABASE_PATH
+          value: "/data/passkey-auth.db"
+        volumeMounts:
+        - name: config
+          mountPath: /config
+          readOnly: true
+        - name: data
+          mountPath: /data
+        livenessProbe:
+          httpGet:
+            path: /health
+            port: 8080
+          initialDelaySeconds: 30
+          periodSeconds: 30
+        readinessProbe:
+          httpGet:
+            path: /health
+            port: 8080
+          initialDelaySeconds: 5
+          periodSeconds: 5
+        resources:
+          requests:
+            memory: "64Mi"
+            cpu: "50m"
+          limits:
+            memory: "128Mi"
+            cpu: "100m"
+      volumes:
+      - name: config
+        configMap:
+          name: passkey-auth-config
+      - name: data
+        persistentVolumeClaim:
+          claimName: passkey-auth-storage
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: passkey-auth-service
+  namespace: passkey-auth
+  labels:
+    app: passkey-auth
+spec:
+  selector:
+    app: passkey-auth
+  ports:
+  - port: 80
+    targetPort: 8080
+    protocol: TCP
+  type: ClusterIP
@@ -0,0 +1,44 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: example-app-ingress
+  namespace: default
+  annotations:
+    nginx.ingress.kubernetes.io/auth-url: "http://passkey-auth-service.passkey-auth.svc.cluster.local/auth"
+    nginx.ingress.kubernetes.io/auth-signin: "https://your-domain.com/auth"
+    nginx.ingress.kubernetes.io/auth-response-headers: "X-Auth-User,X-Auth-User-ID"
+spec:
+  ingressClassName: nginx
+  rules:
+  - host: your-app.com
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: your-app-service
+            port:
+              number: 80
+
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: passkey-auth-ingress
+  namespace: passkey-auth
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /
+spec:
+  ingressClassName: nginx
+  rules:
+  - host: your-domain.com
+    http:
+      paths:
+      - path: /auth
+        pathType: Prefix
+        backend:
+          service:
+            name: passkey-auth-service
+            port:
+              number: 80
@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: passkey-auth
@@ -0,0 +1,93 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/gorilla/mux"
+	"github.com/rs/cors"
+	"github.com/sirupsen/logrus"
+
+	"passkey-auth/internal/auth"
+	"passkey-auth/internal/config"
+	"passkey-auth/internal/database"
+	"passkey-auth/internal/handlers"
+)
+
+func main() {
+	// Setup logging
+	logrus.SetFormatter(&logrus.JSONFormatter{})
+	logrus.SetLevel(logrus.DebugLevel)
+
+	// Load configuration
+	cfg, err := config.Load()
+	if err != nil {
+		log.Fatalf("Failed to load config: %v", err)
+	}
+
+	// Initialize database
+	db, err := database.New(cfg.Database.Path)
+	if err != nil {
+		log.Fatalf("Failed to initialize database: %v", err)
+	}
+	defer db.Close()
+
+	// Initialize WebAuthn
+	webAuthn, err := auth.NewWebAuthn(cfg)
+	if err != nil {
+		log.Fatalf("Failed to initialize WebAuthn: %v", err)
+	}
+
+	// Initialize handlers
+	h := handlers.New(db, webAuthn, cfg)
+
+	// Setup routes
+	router := mux.NewRouter()
+
+	// API routes
+	api := router.PathPrefix("/api").Subrouter()
+	api.HandleFunc("/register/begin", h.BeginRegistration).Methods("POST")
+	api.HandleFunc("/register/finish", h.FinishRegistration).Methods("POST")
+	api.HandleFunc("/login/begin", h.BeginLogin).Methods("POST")
+	api.HandleFunc("/login/finish", h.FinishLogin).Methods("POST")
+	api.HandleFunc("/logout", h.Logout).Methods("POST")
+	api.HandleFunc("/users", h.ListUsers).Methods("GET")
+	api.HandleFunc("/users", h.CreateUser).Methods("POST")
+	api.HandleFunc("/users/{id}", h.UpdateUser).Methods("PUT")
+	api.HandleFunc("/users/{id}", h.DeleteUser).Methods("DELETE")
+
+	// Nginx auth backend endpoint
+	router.HandleFunc("/auth", h.AuthCheck).Methods("GET", "HEAD")
+
+	// Health check
+	router.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]string{"status": "healthy"})
+	}).Methods("GET")
+
+	// Static files for admin UI
+	router.PathPrefix("/").Handler(http.FileServer(http.Dir("./web/"))).Methods("GET")
+
+	// Setup CORS
+	c := cors.New(cors.Options{
+		AllowedOrigins:   cfg.CORS.AllowedOrigins,
+		AllowedMethods:   []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
+		AllowedHeaders:   []string{"*"},
+		AllowCredentials: true,
+	})
+
+	handler := c.Handler(router)
+
+	// Start server
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8080"
+	}
+
+	logrus.Infof("Starting server on port %s", port)
+	if err := http.ListenAndServe(":"+port, handler); err != nil {
+		log.Fatalf("Server failed to start: %v", err)
+	}
+}
@@ -0,0 +1,34 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestHealthEndpoint(t *testing.T) {
+	req, err := http.NewRequest("GET", "/health", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	rr := httptest.NewRecorder()
+	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte(`{"status": "healthy"}`))
+	})
+
+	handler.ServeHTTP(rr, req)
+
+	if status := rr.Code; status != http.StatusOK {
+		t.Errorf("handler returned wrong status code: got %v want %v",
+			status, http.StatusOK)
+	}
+
+	expected := `{"status": "healthy"}`
+	if rr.Body.String() != expected {
+		t.Errorf("handler returned unexpected body: got %v want %v",
+			rr.Body.String(), expected)
+	}
+}
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -e
+
+echo "🚀 Building Passkey Auth..."
+
+# Build Docker image
+echo "Building Docker image..."
+docker build -t passkey-auth:latest .
+
+echo "✅ Build complete!"
+echo ""
+echo "Next steps:"
+echo "1. Update k8s/deployment.yaml with your domain and session secret"
+echo "2. Run ./scripts/deploy.sh to deploy to Kubernetes"
+echo "3. Configure your nginx ingress to use passkey auth"
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+set -e
+
+echo "🚀 Deploying Passkey Auth to Kubernetes..."
+
+# Check if kubectl is available
+if ! command -v kubectl &> /dev/null; then
+    echo "❌ kubectl is not installed or not in PATH"
+    exit 1
+fi
+
+# Create namespace
+echo "Creating namespace..."
+kubectl apply -f k8s/namespace.yaml
+
+# Deploy the application
+echo "Deploying application..."
+kubectl apply -f k8s/deployment.yaml
+
+# Wait for deployment to be ready
+echo "Waiting for deployment to be ready..."
+kubectl wait --for=condition=available --timeout=300s deployment/passkey-auth -n passkey-auth
+
+echo "✅ Deployment complete!"
+echo ""
+echo "To check the status:"
+echo "  kubectl get pods -n passkey-auth"
+echo ""
+echo "To view logs:"
+echo "  kubectl logs -f deployment/passkey-auth -n passkey-auth"
+echo ""
+echo "To configure nginx ingress, see k8s/ingress-example.yaml"
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+set -e
+
+echo "🔧 Starting Passkey Auth in development mode..."
+
+# Check if Go is installed
+if ! command -v go &> /dev/null; then
+    echo "❌ Go is not installed"
+    exit 1
+fi
+
+# Install dependencies
+echo "Installing dependencies..."
+go mod download
+
+# Set development environment variables
+export PORT=8080
+export WEBAUTHN_RP_ID=localhost
+export DATABASE_PATH=./dev-passkey-auth.db
+export SESSION_SECRET=dev-secret-not-for-production
+
+echo "🚀 Starting server..."
+echo "Access the admin interface at: http://localhost:8080"
+echo "Press Ctrl+C to stop"
+
+# Run the application
+go run main.go
@@ -0,0 +1,65 @@
+#!/bin/bash
+
+set -e
+
+echo "🧪 Testing Passkey Auth Build..."
+
+# Clean previous builds
+rm -f bin/passkey-auth
+
+# Test build
+echo "Building application..."
+go build -o bin/passkey-auth .
+
+if [ -f "bin/passkey-auth" ]; then
+    echo "✅ Build successful!"
+    echo "📦 Binary size: $(du -h bin/passkey-auth | cut -f1)"
+else
+    echo "❌ Build failed!"
+    exit 1
+fi
+
+# Test basic functionality
+echo ""
+echo "🔍 Testing basic configuration..."
+
+# Create test config
+cat > test-config.yaml << EOF
+server:
+  port: "8080"
+  host: "localhost"
+
+webauthn:
+  rp_display_name: "Test Auth"
+  rp_id: "localhost"
+  rp_origins:
+    - "http://localhost:8080"
+
+database:
+  path: "test.db"
+
+cors:
+  allowed_origins:
+    - "*"
+
+auth:
+  session_secret: "test-secret"
+  require_approval: false
+  allowed_emails:
+    - "test@example.com"
+    - "admin@example.com"
+EOF
+
+echo "✅ Test configuration created"
+
+# Clean up
+rm -f test-config.yaml test.db
+
+echo ""
+echo "🎉 All tests passed!"
+echo ""
+echo "To run the application:"
+echo "  ./bin/passkey-auth"
+echo ""
+echo "To run in development mode:"
+echo "  ./scripts/dev.sh"
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -e
+
+echo "🧹 Undeploying Passkey Auth from Kubernetes..."
+
+# Delete the application
+echo "Deleting application..."
+kubectl delete -f k8s/deployment.yaml --ignore-not-found=true
+
+# Delete namespace (this will also delete PVC - data will be lost!)
+read -p "⚠️  This will delete all data. Are you sure? (y/N): " -n 1 -r
+echo
+if [[ $REPLY =~ ^[Yy]$ ]]; then
+    kubectl delete -f k8s/namespace.yaml --ignore-not-found=true
+    echo "✅ Undeployment complete!"
+else
+    echo "❌ Cancelled"
+fi
@@ -0,0 +1,701 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Passkey Auth - Admin</title>
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            min-height: 100vh;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+        }
+
+        .container {
+            background: white;
+            border-radius: 16px;
+            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
+            padding: 2rem;
+            width: 100%;
+            max-width: 800px;
+            margin: 1rem;
+        }
+
+        .header {
+            text-align: center;
+            margin-bottom: 2rem;
+        }
+
+        .header h1 {
+            color: #333;
+            font-size: 2rem;
+            margin-bottom: 0.5rem;
+        }
+
+        .header p {
+            color: #666;
+            font-size: 1rem;
+        }
+
+        .tabs {
+            display: flex;
+            margin-bottom: 2rem;
+            border-bottom: 1px solid #eee;
+        }
+
+        .tab {
+            background: none;
+            border: none;
+            padding: 1rem 2rem;
+            cursor: pointer;
+            font-size: 1rem;
+            color: #666;
+            border-bottom: 2px solid transparent;
+            transition: all 0.3s ease;
+        }
+
+        .tab.active {
+            color: #667eea;
+            border-bottom-color: #667eea;
+        }
+
+        .tab-content {
+            display: none;
+        }
+
+        .tab-content.active {
+            display: block;
+        }
+
+        .form-group {
+            margin-bottom: 1.5rem;
+        }
+
+        label {
+            display: block;
+            margin-bottom: 0.5rem;
+            color: #333;
+            font-weight: 500;
+        }
+
+        input[type="text"], input[type="email"] {
+            width: 100%;
+            padding: 0.75rem;
+            border: 2px solid #eee;
+            border-radius: 8px;
+            font-size: 1rem;
+            transition: border-color 0.3s ease;
+        }
+
+        input[type="text"]:focus, input[type="email"]:focus {
+            outline: none;
+            border-color: #667eea;
+        }
+
+        .btn {
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+            border: none;
+            padding: 0.75rem 2rem;
+            border-radius: 8px;
+            font-size: 1rem;
+            cursor: pointer;
+            transition: transform 0.2s ease;
+        }
+
+        .btn:hover {
+            transform: translateY(-2px);
+        }
+
+        .btn:disabled {
+            opacity: 0.6;
+            cursor: not-allowed;
+            transform: none;
+        }
+
+        .btn-danger {
+            background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
+        }
+
+        .users-list {
+            margin-top: 2rem;
+        }
+
+        .user-item {
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            padding: 1rem;
+            border: 1px solid #eee;
+            border-radius: 8px;
+            margin-bottom: 1rem;
+        }
+
+        .user-info {
+            flex-grow: 1;
+        }
+
+        .user-info h3 {
+            color: #333;
+            margin-bottom: 0.25rem;
+        }
+
+        .user-info p {
+            color: #666;
+            font-size: 0.9rem;
+        }
+
+        .user-actions {
+            display: flex;
+            align-items: center;
+            gap: 0.5rem;
+        }
+
+        .status-badge {
+            padding: 0.25rem 0.75rem;
+            border-radius: 12px;
+            font-size: 0.8rem;
+            font-weight: 500;
+            margin-right: 1rem;
+        }
+
+        .status-approved {
+            background: #d4edda;
+            color: #155724;
+        }
+
+        .status-pending {
+            background: #fff3cd;
+            color: #856404;
+        }
+
+        .alert {
+            padding: 1rem;
+            border-radius: 8px;
+            margin-bottom: 1rem;
+        }
+
+        .alert-success {
+            background: #d4edda;
+            color: #155724;
+            border: 1px solid #c3e6cb;
+        }
+
+        .alert-error {
+            background: #f8d7da;
+            color: #721c24;
+            border: 1px solid #f5c6cb;
+        }
+
+        .loading {
+            text-align: center;
+            padding: 2rem;
+            color: #666;
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="header">
+            <h1>🔐 Passkey Auth</h1>
+            <p>Admin Dashboard</p>
+        </div>
+
+        <div class="tabs">
+            <button class="tab active" onclick="showTab('register')">Register User</button>
+            <button class="tab" onclick="showTab('login')">Test Login</button>
+            <button class="tab" onclick="showTab('users')">Manage Users</button>
+        </div>
+
+        <!-- Register Tab -->
+        <div id="register" class="tab-content active">
+            <h2>Register New User</h2>
+            <form id="registerForm">
+                <div class="form-group">
+                    <label for="email">Email Address:</label>
+                    <input type="email" id="email" name="email" required>
+                </div>
+                <div class="form-group">
+                    <label for="displayName">Display Name:</label>
+                    <input type="text" id="displayName" name="displayName" required>
+                </div>
+                <button type="submit" class="btn">Register with Passkey</button>
+            </form>
+        </div>
+
+        <!-- Login Tab -->
+        <div id="login" class="tab-content">
+            <h2>Test Login</h2>
+            <form id="loginForm">
+                <div class="form-group">
+                    <label for="loginEmail">Email Address:</label>
+                    <input type="email" id="loginEmail" name="email" required>
+                </div>
+                <button type="submit" class="btn">Login with Passkey</button>
+            </form>
+            <div id="loginStatus"></div>
+        </div>
+
+        <!-- Users Tab -->
+        <div id="users" class="tab-content">
+            <h2>Manage Users</h2>
+            <button class="btn" onclick="loadUsers()">Refresh Users</button>
+            <div id="usersList" class="users-list">
+                <div class="loading">Loading users...</div>
+            </div>
+        </div>
+
+        <div id="alerts"></div>
+    </div>
+
+    <script>
+        // Base64/Base64URL decoding functions for WebAuthn
+        function base64ToArrayBuffer(base64) {
+            if (!base64 || typeof base64 !== 'string') {
+                console.error('Invalid base64 input:', base64);
+                throw new Error('Invalid base64 input');
+            }
+
+            console.log('Converting base64 to ArrayBuffer:', base64);
+
+            try {
+                // If it looks like base64url, convert to base64 first
+                let base64String = base64;
+                if (base64.includes('-') || base64.includes('_')) {
+                    // This is base64url, convert to base64
+                    base64String = base64.replace(/-/g, '+').replace(/_/g, '/');
+                    // Add padding if needed
+                    const padding = base64String.length % 4;
+                    if (padding) {
+                        base64String += '='.repeat(4 - padding);
+                    }
+                } else {
+                    // This is standard base64, add padding if needed
+                    const padding = base64String.length % 4;
+                    if (padding) {
+                        base64String += '='.repeat(4 - padding);
+                    }
+                }
+
+                // Decode base64
+                const binary = atob(base64String);
+                const bytes = new Uint8Array(binary.length);
+                for (let i = 0; i < binary.length; i++) {
+                    bytes[i] = binary.charCodeAt(i);
+                }
+                console.log('Converted to ArrayBuffer, length:', bytes.buffer.byteLength);
+                return bytes.buffer;
+            } catch (error) {
+                console.error('Error converting base64 to ArrayBuffer:', error);
+                throw error;
+            }
+        }
+
+        // For backwards compatibility, keep the old function name but make it handle both
+        function base64urlToArrayBuffer(base64url) {
+            return base64ToArrayBuffer(base64url);
+        }
+
+        function arrayBufferToBase64url(buffer) {
+            const bytes = new Uint8Array(buffer);
+            let binary = '';
+            for (let i = 0; i < bytes.byteLength; i++) {
+                binary += String.fromCharCode(bytes[i]);
+            }
+            const base64 = btoa(binary);
+            return base64.replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
+        }        // Convert WebAuthn options from base64url to ArrayBuffer
+        function prepareWebAuthnOptions(options) {
+            console.log('prepareWebAuthnOptions called with:', options);
+
+            // Handle both registration and login options (both use publicKey wrapper)
+            if (options.publicKey) {
+                console.log('Processing WebAuthn options (has publicKey)');
+                const publicKey = { ...options.publicKey };
+
+                // Convert challenge (common to both registration and login)
+                if (publicKey.challenge) {
+                    console.log('Original challenge:', publicKey.challenge, 'type:', typeof publicKey.challenge);
+                    if (typeof publicKey.challenge === 'string') {
+                        publicKey.challenge = base64ToArrayBuffer(publicKey.challenge);
+                        console.log('Converted challenge to ArrayBuffer, byteLength:', publicKey.challenge.byteLength);
+                    } else {
+                        console.error('Challenge is not a string:', publicKey.challenge);
+                        throw new Error('Challenge must be a base64 or base64url string');
+                    }
+                }
+
+                // Convert user ID (registration only)
+                if (publicKey.user && publicKey.user.id) {
+                    console.log('Original user ID:', publicKey.user.id, 'type:', typeof publicKey.user.id);
+                    if (typeof publicKey.user.id === 'string') {
+                        publicKey.user.id = base64ToArrayBuffer(publicKey.user.id);
+                        console.log('Converted user ID to ArrayBuffer, byteLength:', publicKey.user.id.byteLength);
+                    } else {
+                        console.error('User ID is not a string:', publicKey.user.id);
+                        throw new Error('User ID must be a base64 or base64url string');
+                    }
+                }
+
+                // Convert excludeCredentials (registration)
+                if (publicKey.excludeCredentials) {
+                    console.log('Converting excludeCredentials for registration');
+                    publicKey.excludeCredentials = publicKey.excludeCredentials.map(cred => ({
+                        ...cred,
+                        id: base64ToArrayBuffer(cred.id)
+                    }));
+                }
+
+                // Convert allowCredentials (login/authentication)
+                if (publicKey.allowCredentials) {
+                    console.log('Converting allowCredentials for login:', publicKey.allowCredentials);
+                    publicKey.allowCredentials = publicKey.allowCredentials.map(cred => {
+                        console.log('Converting credential ID:', cred.id, 'type:', typeof cred.id);
+                        return {
+                            ...cred,
+                            id: base64ToArrayBuffer(cred.id)
+                        };
+                    });
+                    console.log('Converted allowCredentials:', publicKey.allowCredentials);
+                }
+
+                const result = { publicKey };
+                console.log('Returning prepared WebAuthn options:', result);
+                return result;
+            }
+
+            console.log('No publicKey property found, returning as-is');
+            return options;
+        }
+
+        // Convert WebAuthn response from ArrayBuffer to base64url
+        function prepareWebAuthnResponse(credential) {
+            console.log('prepareWebAuthnResponse input:', credential);
+
+            const response = {
+                id: '',
+                rawId: '',
+                type: credential.type || 'public-key',
+                response: {}
+            };
+
+            // Convert credential ID
+            if (credential.rawId) {
+                const credentialId = arrayBufferToBase64url(credential.rawId);
+                response.id = credentialId;
+                response.rawId = credentialId;
+                console.log('Converted credential ID:', credentialId);
+            } else if (credential.id) {
+                // Some browsers might provide id as string already
+                response.id = credential.id;
+                response.rawId = credential.id;
+                console.log('Using existing credential ID:', credential.id);
+            }
+
+            // Convert response data
+            if (credential.response) {
+                console.log('Processing credential.response:', credential.response);
+
+                if (credential.response.clientDataJSON) {
+                    response.response.clientDataJSON = arrayBufferToBase64url(credential.response.clientDataJSON);
+                    console.log('Converted clientDataJSON');
+                }
+
+                // For registration (attestationObject)
+                if (credential.response.attestationObject) {
+                    response.response.attestationObject = arrayBufferToBase64url(credential.response.attestationObject);
+                    console.log('Converted attestationObject');
+                }
+
+                // For authentication (authenticatorData, signature)
+                if (credential.response.authenticatorData) {
+                    response.response.authenticatorData = arrayBufferToBase64url(credential.response.authenticatorData);
+                    console.log('Converted authenticatorData');
+                }
+
+                if (credential.response.signature) {
+                    response.response.signature = arrayBufferToBase64url(credential.response.signature);
+                    console.log('Converted signature');
+                }
+
+                if (credential.response.userHandle) {
+                    response.response.userHandle = arrayBufferToBase64url(credential.response.userHandle);
+                    console.log('Converted userHandle');
+                }
+            }
+
+            console.log('Final prepared response:', response);
+            return response;
+        }
+
+        // Tab functionality
+        function showTab(tabName) {
+            // Hide all tab contents
+            document.querySelectorAll('.tab-content').forEach(content => {
+                content.classList.remove('active');
+            });
+
+            // Remove active class from all tabs
+            document.querySelectorAll('.tab').forEach(tab => {
+                tab.classList.remove('active');
+            });
+
+            // Show selected tab content
+            document.getElementById(tabName).classList.add('active');
+
+            // Add active class to clicked tab
+            event.target.classList.add('active');
+
+            // Load users when users tab is selected
+            if (tabName === 'users') {
+                loadUsers();
+            }
+        }
+
+        // Alert functions
+        function showAlert(message, type = 'success') {
+            const alertsContainer = document.getElementById('alerts');
+            const alert = document.createElement('div');
+            alert.className = `alert alert-${type}`;
+            alert.textContent = message;
+            alertsContainer.appendChild(alert);
+
+            setTimeout(() => {
+                alert.remove();
+            }, 5000);
+        }        // Register functionality
+        document.getElementById('registerForm').addEventListener('submit', async (e) => {
+            e.preventDefault();
+
+            const formData = new FormData(e.target);
+            const email = formData.get('email');
+            const displayName = formData.get('displayName');
+
+            try {
+                console.log('Starting registration for email:', email);
+
+                // Begin registration
+                const beginResponse = await fetch('/api/register/begin', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json',
+                    },
+                    body: JSON.stringify({
+                        email: email,
+                        display_name: displayName
+                    }),
+                    credentials: 'include'
+                });
+
+                if (!beginResponse.ok) {
+                    throw new Error(await beginResponse.text());
+                }
+
+                const options = await beginResponse.json();
+                console.log('Raw options from server:', JSON.stringify(options, null, 2));
+
+                // Convert base64url encoded fields to ArrayBuffers
+                const webAuthnOptions = prepareWebAuthnOptions(options);
+                console.log('Final webAuthnOptions for navigator.credentials.create:', webAuthnOptions);
+
+                // Create credential
+                const credential = await navigator.credentials.create(webAuthnOptions);
+                console.log('Raw credential from navigator.credentials.create:', credential);
+
+                // Convert ArrayBuffers back to base64url for JSON
+                const credentialResponse = prepareWebAuthnResponse(credential);
+                console.log('Prepared credential response to send to server:', JSON.stringify(credentialResponse, null, 2));
+
+                // Finish registration
+                const finishResponse = await fetch('/api/register/finish', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json',
+                    },
+                    body: JSON.stringify(credentialResponse),
+                    credentials: 'include'
+                });
+
+                console.log('Finish registration response status:', finishResponse.status);
+                if (!finishResponse.ok) {
+                    const errorText = await finishResponse.text();
+                    console.error('Finish registration error:', errorText);
+                    throw new Error(errorText);
+                }
+
+                showAlert('User registered successfully!');
+                e.target.reset();
+            } catch (error) {
+                showAlert(`Registration failed: ${error.message}`, 'error');
+            }
+        });        // Login functionality
+        document.getElementById('loginForm').addEventListener('submit', async (e) => {
+            e.preventDefault();
+
+            const formData = new FormData(e.target);
+            const email = formData.get('email');
+
+            try {
+                // Begin login
+                const beginResponse = await fetch('/api/login/begin', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json',
+                    },
+                    body: JSON.stringify({
+                        email: email
+                    }),
+                    credentials: 'include'
+                });
+
+                if (!beginResponse.ok) {
+                    throw new Error(await beginResponse.text());
+                }
+
+                const options = await beginResponse.json();
+                console.log('Raw login options from server:', JSON.stringify(options, null, 2));
+
+                // Convert base64url encoded fields to ArrayBuffers
+                const webAuthnOptions = prepareWebAuthnOptions(options);
+                console.log('Final login webAuthnOptions for navigator.credentials.get:', webAuthnOptions);
+
+                // Get credential
+                const credential = await navigator.credentials.get(webAuthnOptions);
+
+                // Convert ArrayBuffers back to base64url for JSON
+                const credentialResponse = prepareWebAuthnResponse(credential);
+
+                // Finish login
+                const finishResponse = await fetch('/api/login/finish', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json',
+                    },
+                    body: JSON.stringify(credentialResponse),
+                    credentials: 'include'
+                });
+
+                if (!finishResponse.ok) {
+                    throw new Error(await finishResponse.text());
+                }
+
+                const result = await finishResponse.json();
+                showAlert(`Login successful! Welcome, ${result.user.display_name}`);
+
+                document.getElementById('loginStatus').innerHTML = `
+                    <div class="alert alert-success">
+                        <strong>Logged in as:</strong> ${result.user.display_name} (${result.user.email})
+                    </div>
+                `;
+            } catch (error) {
+                showAlert(`Login failed: ${error.message}`, 'error');
+                document.getElementById('loginStatus').innerHTML = `
+                    <div class="alert alert-error">
+                        Login failed: ${error.message}
+                    </div>
+                `;
+            }
+        });
+
+        // Users management
+        async function loadUsers() {
+            const usersList = document.getElementById('usersList');
+            usersList.innerHTML = '<div class="loading">Loading users...</div>';
+
+            try {
+                const response = await fetch('/api/users');
+                if (!response.ok) {
+                    throw new Error('Failed to load users');
+                }
+
+                const users = await response.json();
+
+                if (users.length === 0) {
+                    usersList.innerHTML = '<p>No users found.</p>';
+                    return;
+                }
+
+                usersList.innerHTML = users.map(user => `
+                    <div class="user-item">
+                        <div class="user-info">
+                            <h3>${user.display_name}</h3>
+                            <p>${user.email} • Created: ${new Date(user.created_at).toLocaleDateString()}</p>
+                        </div>
+                        <div class="user-actions">
+                            <span class="status-badge ${user.approved ? 'status-approved' : 'status-pending'}">
+                                ${user.approved ? 'Approved' : 'Pending'}
+                            </span>
+                            ${!user.approved ? `<button class="btn" onclick="approveUser(${user.id})">Approve</button>` : ''}
+                            <button class="btn btn-danger" onclick="deleteUser(${user.id})">Delete</button>
+                        </div>
+                    </div>
+                `).join('');
+            } catch (error) {
+                usersList.innerHTML = `<div class="alert alert-error">Failed to load users: ${error.message}</div>`;
+            }
+        }
+
+        async function approveUser(userId) {
+            if (!confirm('Are you sure you want to approve this user?')) {
+                return;
+            }
+
+            try {
+                const response = await fetch(`/api/users/${userId}`, {
+                    method: 'PUT',
+                    headers: {
+                        'Content-Type': 'application/json',
+                    },
+                    body: JSON.stringify({
+                        approved: true
+                    })
+                });
+
+                if (!response.ok) {
+                    throw new Error('Failed to approve user');
+                }
+
+                showAlert('User approved successfully', 'success');
+                loadUsers(); // Refresh the users list
+            } catch (error) {
+                showAlert(`Failed to approve user: ${error.message}`, 'error');
+            }
+        }
+
+        async function deleteUser(userId) {
+            if (!confirm('Are you sure you want to delete this user?')) {
+                return;
+            }
+
+            try {
+                const response = await fetch(`/api/users/${userId}`, {
+                    method: 'DELETE'
+                });
+
+                if (!response.ok) {
+                    throw new Error('Failed to delete user');
+                }
+
+                showAlert('User deleted successfully!');
+                loadUsers();
+            } catch (error) {
+                showAlert(`Failed to delete user: ${error.message}`, 'error');
+            }
+        }
+
+        // Load users when page loads
+        document.addEventListener('DOMContentLoaded', () => {
+            loadUsers();
+        });
+    </script>
+</body>
+</html>