/**
 * Comprehensive Security and Validation Layer
 * Provides security features, input sanitization, and path validation for production use
 */
export interface SecurityConfig {
    allowedFileExtensions: string[];
    allowedImageExtensions: string[];
    allowedMediaExtensions: string[];
    maxFileSize: number;
    maxImageSize: number;
    maxMediaSize: number;
    allowedDirectories: string[];
    blockedDirectories: string[];
    enablePathTraversalProtection: boolean;
    enableInputSanitization: boolean;
    maxStringLength: number;
    maxArrayLength: number;
    rateLimitRequests: number;
    rateLimitWindow: number;
}
export declare const DEFAULT_SECURITY_CONFIG: SecurityConfig;
export declare class SecurityValidator {
    private config;
    private requestCounts;
    constructor(config?: SecurityConfig);
    /**
     * Validate file path for security issues
     */
    validateFilePath(filePath: string, fileType?: 'presentation' | 'image' | 'media'): void;
    /**
     * Validate file size
     */
    validateFileSize(filePath: string, fileType?: 'presentation' | 'image' | 'media'): Promise<void>;
    /**
     * Sanitize string input
     */
    sanitizeString(input: string, fieldName?: string): string;
    /**
     * Validate array input
     */
    validateArray(input: any[], fieldName?: string): void;
    /**
     * Validate numeric input
     */
    validateNumber(input: number, fieldName: string, min?: number, max?: number): void;
    /**
     * Rate limiting check
     */
    checkRateLimit(clientId: string): void;
    /**
     * Validate color input (hex codes)
     */
    validateColor(color: string, fieldName?: string): string;
    /**
     * Comprehensive input validation for PowerPoint operations
     */
    validatePowerPointInput(input: any, operation: string): any;
}
export declare class SecurityError extends Error {
    constructor(message: string);
}
export declare const securityUtils: {
    /**
     * Generate secure random ID
     */
    generateSecureId(): string;
    /**
     * Hash sensitive data
     */
    hashSensitiveData(data: string): string;
    /**
     * Validate email format
     */
    validateEmail(email: string): boolean;
    /**
     * Validate URL format
     */
    validateUrl(url: string): boolean;
};
export declare const securityValidator: SecurityValidator;
//# sourceMappingURL=security.d.ts.map