Module Security 

Security Module

Comprehensive security features for Air including:

• Rate limiting with token bucket algorithm (per-IP and per-client)
• Checksum verification for file integrity
• Secure credential storage with encryption
• Timing attack protection for sensitive operations
• Secure memory handling with zeroization
• Key rotation and management
• Security event auditing and logging

VSCode Security References

This security module aligns with VSCode’s security patterns:

• Rate limiting similar to VSCode’s API rate limiting
• Secure credential storage matching VSCode’s secret storage
• File integrity verification similar to VSCode’s extension verification
• Security audit logging inspired by VSCode’s telemetry security events

Security Model for External Connections

The security module implements a defense-in-depth approach for external connections:

Network Security

• Rate limiting prevents abuse and DoS attacks
• IP-based rate limiting limits impact per client
• Client-based rate limiting limits impact per authenticated client
• Connection pooling limits total concurrent connections

Authentication Security

• Secure credential storage with AES-GCM encryption
• PBKDF2 key derivation with high iteration count
• Timing attack protection for password comparisons
• Secure token generation and validation

Data Security

• SHA-256 checksum verification for file integrity
• AES-GCM encryption for credential storage
• Key wrapping for master key protection
• Secure memory handling with zeroization

Audit and Monitoring

• Comprehensive security event logging
• Failed authentication attempts tracking
• Rate limit violation logging
• Security metric collection for Mountain integration

Mountain Settings Integration

Security policies are integrated with Mountain settings:

• Rate limit thresholds configurable via Mountain settings
• Security event thresholds configurable via Mountain settings
• Alert notification channels configured via Mountain
• Security metric retention configured via Mountain

TODO: Advanced Features

• Implement HSM (Hardware Security Module) integration for key storage
• Add support for hardware-backed key generation and storage
• Implement certificate pinning for external API connections
• Add support for TLS 1.3 with perfect forward secrecy
• Implement security policy enforcement and validation
• Add support for multi-factor authentication
• Implement security compliance reporting (SOC2, PCI-DSS, etc.)
• Add real-time security threat detection and response
• Implement secure communication channels with VSCode extensions
• Add support for encrypted data at rest with multiple keys

Timing Attack Protection

The module implements constant-time operations for sensitive comparisons:

• Password comparisons use constant-time algorithms
• Token comparisons are timing-attack resistant
• Hash comparisons use fixed-time comparison functions
• Authentication response timing is normalized

Secure Memory Handling

Sensitive data in memory is protected through:

• Zeroization on drop for secure data structures
• Memory encryption for sensitive buffers
• Stack canaries for overflow detection
• Memory locking to prevent swapping

Key Rotation

Key rotation is supported through:

• Automatic key rotation hooks for periodic key updates
• Key versioning for backward compatibility
• Secure key storage with key wrapping
• Key rotation event logging and auditing

Security Event Auditing

All security events are logged for auditing:

• Authentication attempts (success and failure)
• Rate limit violations
• Key rotations
• Security configuration changes
• Access control violations

Security events are forwarded to Mountain for correlation and alerting.

Structs

ChecksumVerifier

Checksum verification for file integrity

EncryptedCredential

Encrypted credential with AES-GCM

KeyRotationResult

Key rotation result

RateLimitConfig

Rate limiting configuration

RateLimitStatus

Rate limit status

RateLimiter

Rate limiter with per-IP and per-client tracking

SecureBytes

Secure byte array that zeroizes memory on drop

SecureStorage

Secure credential storage with AES-GCM encryption

SecurityAuditor

Security auditor for logging security events

SecurityEvent

Security event audit log

Enums

SecurityEventType

Security event types

SecuritySeverity

Security severity levels