export interface PasswordValidationResult {
    valid: boolean;
    errors: string[];
}
/**
 * Password requirements:
 * - Minimum 8 characters
 * - At least 1 uppercase letter
 * - At least 1 lowercase letter
 * - At least 1 number
 */
export declare function validatePasswordStrength(password: string): PasswordValidationResult;
/**
 * Hash a password using Node's built-in scrypt
 * Returns format: salt:hash (both hex encoded)
 */
export declare function hashPassword(password: string): Promise<string>;
/**
 * Verify a password against a scrypt hash
 * Expects format: salt:hash (both hex encoded)
 */
export declare function verifyPassword(password: string, storedHash: string): Promise<boolean>;