import type { SignAlg } from "../types";
export type IProtectedHeaders = {
    kid?: null | string;
    x5u?: null | string;
    x5c?: null | string[];
    x5tS256?: null | string;
    x5tO?: null | {
        digAlg: string;
        digVal: string;
    };
    sigX5ts?: null | {
        digAlg: string;
        digVal: string;
    }[];
    srCms?: null | {
        commId: object;
    }[];
    srAts?: null | object[];
    sigPl?: null | object;
    sigPId?: null | object;
    sigT?: null | string;
    adoTst?: null | object[];
};
export interface ExtProtectedHeaders extends IProtectedHeaders {
    alg?: SignAlg;
    cty?: null | string;
    b64?: boolean;
    "x5t#o"?: null | {
        digAlg: string;
        digVal: string;
    };
    "x5t#S256"?: null | string;
    crit?: string[];
    sigD?: null | object;
}
/**
 * This class is used to manage the protected headers of a token, validating them and returning a
 * set of methods to interact with them.
 */
export default class ProtectedHeaders {
    private header?;
    constructor(p?: IProtectedHeaders);
    /**
     * The addHeaders method is used to add headers to the protected headers.
     *
     * @param  {object}  p  The headers to add.
     *
     * @return  {void}
     */
    addHeaders(p: ExtProtectedHeaders): void;
    /**
     * The detach method is used to set the headers for a detached signature.
     * This method is used to set the `sigD` header parameter.
     */
    setDetached(sigD: ExtProtectedHeaders["sigD"]): void;
    /**
     * Get the object of the protected headers.
     *
     * @return  {Object}  The protected headers.
     */
    getHeaders(): Object;
    /**
     * Get the base64url string encoded version of the protected headers.
     *
     * @return  {string}  The protected headers in base64url string form.
     */
    toString(): string;
}