export interface WorkbookProtection {
    /** Legacy 16-bit hex hash of the workbook password ("CC1A" etc.). */
    workbookPassword?: string;
    workbookPasswordCharacterSet?: string;
    workbookAlgorithmName?: string;
    workbookHashValue?: string;
    workbookSaltValue?: string;
    workbookSpinCount?: number;
    /** Legacy 16-bit hex hash of the revisions-tracking password. */
    revisionsPassword?: string;
    revisionsPasswordCharacterSet?: string;
    revisionsAlgorithmName?: string;
    revisionsHashValue?: string;
    revisionsSaltValue?: string;
    revisionsSpinCount?: number;
    /** Lock add/delete/move/rename/hide of sheets. */
    lockStructure?: boolean;
    /** Lock the workbook window size and position. */
    lockWindows?: boolean;
    /** Lock revision tracking — enabled with the "Track Changes" feature. */
    lockRevision?: boolean;
}
export declare const makeWorkbookProtection: (opts?: WorkbookProtection) => WorkbookProtection;
import type { Workbook } from './workbook';
/**
 * Lock the workbook with Excel's "Protect Workbook → Structure" default
 * (lockStructure=true). Pass `overrides` to also lock windows /
 * revision-tracking, or to attach a password-hash quad. Plaintext password
 * support is deferred until the D-tier hashing helper lands.
 */
export declare const protectWorkbook: (wb: Workbook, overrides?: Partial<WorkbookProtection>) => WorkbookProtection;
/** Drop the workbook-protection record entirely. */
export declare const unprotectWorkbook: (wb: Workbook) => void;
/** True iff `lockStructure === true`. */
export declare const isWorkbookProtected: (wb: Workbook) => boolean;