export declare class SignManager {
    static addKey(key: string, value: string): void;
    static keyExists(key: string): boolean;
    static signContent(content: string, keyId: string, short?: boolean): string;
    static verifySignedContent(content: string, keyId: string, signature: string, short?: boolean): boolean;
    /** This function determines if a cache key contains a signing key.
     * @param cacheKey
     */
    static obtainKey(cacheKey: string): string | undefined;
    static signUrlParamsObj(urlParams: {
        [key: string]: string | number | boolean | string[] | number[] | boolean[];
    }, keyId: string): {
        rck: string;
        rcs: string;
    };
    static signUrlParams(urlParams: {
        [key: string]: string | number | boolean | string[] | number[] | boolean[];
    }, keyId: string): string;
    private static sortSearchParams;
    static verifySignedUrlParams(urlParams: {
        [key: string]: string | number | boolean | string[] | number[] | boolean[];
    }, rck: string | null, rks: string | null): boolean;
}
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