#!/bin/bash

# Enhanced Security Architecture: Re-authentication for Network Switching & Standby Recovery
# Analysis and Implementation Plan

echo "🔐 HMAC File Server 3.3.0 - Enhanced Security Analysis"
echo "======================================================"

echo ""
echo "📋 Current Security Model Analysis:"
echo "• Session-based authentication with 72-hour persistence"
echo "• Token refresh mechanism (up to 10 refreshes)"
echo "• Network change detection and logging"
echo "• Standby recovery with 24-hour grace extension"

echo ""
echo "🔒 Security Enhancement Proposal:"
echo "=================================="

echo ""
echo "1. SMART RE-AUTHENTICATION TRIGGERS:"
echo "   ✓ Network IP change detected (5G ↔ WiFi)"
echo "   ✓ Device standby > 30 minutes"
echo "   ✓ Multiple failed authentication attempts"
echo "   ✓ Suspicious user agent changes"
echo "   ✓ Geographic location changes (if available)"

echo ""
echo "2. PROGRESSIVE SECURITY LEVELS:"
echo "   • Level 1: Standard session refresh (current)"
echo "   • Level 2: Challenge-response with existing secret"
echo "   • Level 3: Full re-authentication required"

echo ""
echo "3. IMPLEMENTATION STRATEGY:"
echo "   • HTTP 401 Unauthorized with WWW-Authenticate header"
echo "   • XEP-0363 compliant re-authentication flow"
echo "   • Client-side automatic secret renewal"
echo "   • Transparent user experience for trusted scenarios"

echo ""
echo "4. SECURITY BENEFITS:"
echo "   • Prevents token hijacking during network transitions"
echo "   • Mitigates risks from device theft/loss"
echo "   • Ensures fresh credentials after standby"
echo "   • Maintains zero-configuration user experience"

echo ""
echo "🎯 RECOMMENDED IMPLEMENTATION:"
echo "• Network change: Challenge-response (Level 2)"
echo "• Standby > 30min: Full re-auth (Level 3)"
echo "• Same network: Standard refresh (Level 1)"
echo ""
echo "This balances security with usability for XMPP mobile clients!"