/**
 * @bunkor/crypto - Utility Functions
 *
 * Common cryptographic operations and helpers
 */
/**
 * Generate a cryptographically secure random string
 * @param length Length in bytes
 * @returns Base64-encoded random string
 */
export declare function generateRandomString(length?: number): string;
/**
 * Generate a cryptographically secure random hex string
 * @param length Length in bytes
 * @returns Hex-encoded random string
 */
export declare function generateRandomHex(length?: number): string;
/**
 * Convert Uint8Array to base64
 */
export declare function arrayBufferToBase64(buffer: Uint8Array | ArrayBuffer): string;
/**
 * Convert base64 string to Uint8Array
 */
export declare function base64ToArrayBuffer(base64: string): Uint8Array;
/**
 * Convert Uint8Array to hex string
 */
export declare function arrayBufferToHex(buffer: Uint8Array | ArrayBuffer): string;
/**
 * Convert hex string to Uint8Array
 */
export declare function hexToArrayBuffer(hex: string): Uint8Array;
/**
 * Calculate SHA-256 hash of data
 * @param data Data to hash
 * @returns Hex-encoded hash
 */
export declare function sha256(data: string | ArrayBuffer | Uint8Array): Promise<string>;
/**
 * Validate password strength
 * @returns Object with validity and message if invalid
 */
export declare function validatePassword(password: string): {
    valid: boolean;
    message?: string;
};
/**
 * Calculate password strength (0-100)
 */
export declare function calculatePasswordStrength(password: string): number;
/**
 * Format bytes for display
 */
export declare function formatBytes(bytes: number, decimals?: number): string;
/**
 * Generate a deterministic key from a seed (for testing/reproducibility)
 * WARNING: Do not use for production security-critical operations
 */
export declare function deriveKeyFromSeed(seed: string, keyLength?: number): Promise<Uint8Array>;
/**
 * Secure string comparison (timing-safe)
 * Prevents timing attacks when comparing sensitive strings
 */
export declare function secureCompare(a: string, b: string): boolean;
/**
 * Safely clear sensitive data from memory
 * Note: JavaScript doesn't guarantee memory clearing, but this helps
 */
export declare function clearSensitiveData(data: Uint8Array | ArrayBuffer): void;
/**
 * Check if Web Crypto API is available
 */
export declare function isWebCryptoAvailable(): boolean;
/**
 * Check browser encryption support
 */
export declare function checkEncryptionSupport(): {
    webCrypto: boolean;
    aesGcm: boolean;
    aesCbc: boolean;
    aesStr: boolean;
    rsaOaep: boolean;
    pbkdf2: boolean;
};
/**
 * Get browser encryption capabilities summary
 */
export declare function getEncryptionCapabilities(): string;
//# sourceMappingURL=crypto-utils.d.ts.map