export declare function hex_md5(s: string): string;
export declare function b64_md5(s: string): string;
export declare function str_md5(s: string): string;
export declare function hex_hmac_md5(key: string, data: string): string;
export declare function b64_hmac_md5(key: string, data: string): string;
export declare function str_hmac_md5(key: string, data: string): string;