import csrf from 'csrf';
import type { Request, Response } from 'express';
import { SecurityEventType } from '../../utils/logger.js';
export interface SessionWithCSRF {
    csrfSecret?: string;
}
export interface CSRFOptions {
    secretLength?: number;
    saltLength?: number;
    ignoreMethods?: string[];
    value?: (req: Request) => string | undefined;
}
export declare const csrfTokens: csrf;
export declare const shouldSkipCSRF: (req: Request) => boolean;
export declare const initializeCSRFSecret: (req: Request) => void;
export declare const extractCSRFToken: (req: Request, options: CSRFOptions) => string | undefined;
export declare const logCSRFSecurityEvent: (eventType: SecurityEventType, req: Request, additionalData?: Record<string, unknown>) => void;
export declare const sendCSRFError: (res: Response, code: string, message: string) => void;
export declare const handleCSRFVerificationError: (req: Request, res: Response, error: unknown) => void;
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