What was fixed:

• Removed hardcoded SerpAPI key from SerpAPIClient.java
• Replaced with secure configuration loading
• All API keys now loaded from environment variables

Current Implementation:

// ✅ SECURE - Loads from environment variables
private static final String API_KEY = ApplicationConfig.getInstance().getSerpApiKey();

// ❌ INSECURE - Never do this
// private static final String API_KEY = "actual_api_key_here";

Set these environment variables before running the application:

# Database Configuration
export DB_HOST=localhost
export DB_PORT=3306
export DB_NAME=jobrec
export DB_USERNAME=your_db_user
export DB_PASSWORD=your_secure_db_password

# Redis Configuration
export REDIS_HOST=localhost
export REDIS_PORT=6379
export REDIS_PASSWORD=your_redis_password

# API Keys (REQUIRED)
export SERPAPI_KEY=your_serpapi_key_here
export EDENAI_KEY=your_edenai_key_here

# Application Environment
export APP_ENVIRONMENT=prod

• API Key Protection: All API keys loaded from environment variables
• Input Validation: Comprehensive validation in ValidationUtil
• SQL Injection Prevention: Prepared statements used throughout
• XSS Protection: Input sanitization implemented
• Error Handling: No sensitive information in error messages
• Session Management: Secure session handling
• Password Security: MD5 hashing (consider upgrading to bcrypt)
• Configuration Security: Sensitive data in environment variables

• Password Hashing: Upgrade from MD5 to bcrypt or Argon2
• HTTPS: Implement SSL/TLS in production
• Rate Limiting: Add API rate limiting
• CORS: Configure proper CORS policies
• Security Headers: Add security headers (CSP, HSTS, etc.)
• Audit Logging: Log security events
• Dependency Scanning: Regular security dependency updates

1. Immediate Actions:

   # Revoke compromised keys immediately
   # SerpAPI: Go to https://serpapi.com/manage-api-key
   # EdenAI: Go to https://www.edenai.co/account
   
   # Generate new API keys
   # Update environment variables
   # Restart application

2. Investigation:

   • Check git history for exposed keys
   • Review access logs
   • Identify scope of exposure

3. Prevention:

   • Use git-secrets or similar tools
   • Implement pre-commit hooks
   • Regular security audits

If keys were committed to git:

# Remove sensitive data from git history
git filter-branch --force --index-filter \
'git rm --cached --ignore-unmatch path/to/file/with/keys' \
--prune-empty --tag-name-filter cat -- --all

# Force push (WARNING: This rewrites history)
git push origin --force --all
git push origin --force --tags

Monitor these security events:

# Failed login attempts
grep "Authentication failed" /opt/tomcat/logs/application.log

# Invalid input attempts
grep "validation failed" /opt/tomcat/logs/application.log

# Database errors (potential injection attempts)
grep "SQLException" /opt/tomcat/logs/application.log

# API errors
grep "API call.*failed" /opt/tomcat/logs/application.log

Regular security health checks:

# Check for hardcoded secrets
grep -r "password\|secret\|key" --include="*.java" src/

# Check for TODO security items
grep -r "TODO.*security\|FIXME.*security" --include="*.java" src/

# Verify environment variables
echo "Checking required environment variables..."
[ -z "$SERPAPI_KEY" ] && echo "❌ SERPAPI_KEY not set"
[ -z "$EDENAI_KEY" ] && echo "❌ EDENAI_KEY not set"
[ -z "$DB_PASSWORD" ] && echo "❌ DB_PASSWORD not set"

# Set secure permissions
chmod 600 .env
chown app:app .env

# Verify no secrets in code
find . -name "*.java" -exec grep -l "api.*key\|password.*=" {} \;

# Check firewall rules
ufw status

# Verify SSL configuration
openssl s_client -connect localhost:8443 -servername localhost

Create .env.template for team members:

# Database Configuration
DB_HOST=localhost
DB_PORT=3306
DB_NAME=jobrec
DB_USERNAME=your_username
DB_PASSWORD=your_password

# Redis Configuration  
REDIS_HOST=localhost
REDIS_PORT=6379
REDIS_PASSWORD=your_redis_password

# API Keys
SERPAPI_KEY=your_serpapi_key
EDENAI_KEY=your_edenai_key

# Application
APP_ENVIRONMENT=dev

• No hardcoded credentials
• Input validation on all user inputs
• Proper error handling without information leakage
• SQL injection prevention (prepared statements)
• XSS prevention (input sanitization)
• Secure session management
• Proper logging without sensitive data

1. Never commit secrets: Use environment variables
2. Validate all inputs: Use ValidationUtil for all user inputs
3. Sanitize outputs: Prevent XSS attacks
4. Use prepared statements: Prevent SQL injection
5. Log securely: No sensitive data in logs
6. Handle errors gracefully: No stack traces to users
7. Keep dependencies updated: Regular security updates

For security issues:

• Security Issues: Create a private issue or contact maintainers
• Vulnerability Reports: Follow responsible disclosure
• Emergency Contact: Use secure communication channels

Author: Leo Ji
Last Updated: December 2024
Security Review: Required before each release