import type { Request, Response, NextFunction } from "express";
export declare function generateSecureToken(length?: number): string;
export declare function hashString(data: string, algorithm?: string): string;
export declare function generateCsrfToken(): string;
export declare function csrfProtection(options?: {
    cookieName?: string;
    headerName?: string;
    ignoreMethods?: string[];
    errorHandler?: (req: Request, res: Response) => void;
}): (req: Request, res: Response, next: NextFunction) => void;
export declare function securityHeaders(): (req: Request, res: Response, next: NextFunction) => void;
export declare function encryptData(data: string, key: string, iv?: Buffer): {
    encrypted: string;
    iv: string;
};
export declare function decryptData(encryptedData: string, key: string, iv: string): string;
export declare function generateJwtSecret(): string;
export declare function sanitizeInput(input: string): string;