//
// NoiseSecurityConstants.swift
// bitchat
//
// This is free and unencumbered software released into the public domain.
// For more information, see <https://unlicense.org>
//

import Foundation

public enum NoiseSecurityConstants {
    // Maximum message size to prevent memory exhaustion
    static let maxMessageSize = 65535 // 64KB as per Noise spec
    
    // Maximum handshake message size
    static let maxHandshakeMessageSize = 2048 // 2KB to accommodate XX pattern
    
    // Session timeout - sessions older than this should be renegotiated
    static let sessionTimeout: TimeInterval = 86400 // 24 hours
    
    // Maximum number of messages before rekey (2^64 - 1 is the nonce limit)
    static let maxMessagesPerSession: UInt64 = 1_000_000_000 // 1 billion messages
    
    // Handshake timeout - abandon incomplete handshakes
    static let handshakeTimeout: TimeInterval = 60 // 1 minute
    
    // Maximum concurrent sessions per peer
    static let maxSessionsPerPeer = 3
    
    // Rate limiting
    public static let maxHandshakesPerMinute = 10
    public static let maxMessagesPerSecond = 100
    
    // Global rate limiting (across all peers)
    public static let maxGlobalHandshakesPerMinute = 30
    public static let maxGlobalMessagesPerSecond = 500
}