export declare enum HmacAlgorithm {
    HmacSha512 = "HmacSha512",
    HmacSha256 = "HmacSha256"
}
export interface XHmacKey {
    readonly hmacKey: Int8Array;
    readonly keySize: number;
    readonly algorithm: HmacAlgorithm;
}
export interface XHmacService {
    generateKey(algorithm: HmacAlgorithm, keySize?: number): Promise<XHmacKey>;
    exportKey(key: XHmacKey): Promise<Int8Array>;
    loadKey(algorithm: HmacAlgorithm, bytes: Int8Array): Promise<XHmacKey>;
    sign(data: Int8Array, key: XHmacKey): Promise<Int8Array>;
    verify(signature: Int8Array, data: Int8Array, key: XHmacKey): Promise<boolean>;
}
export declare const HmacService: XHmacService;