kn@pc:~$ locale
LANG=en_US.UTF-8
LANGUAGE=en
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=ru_RU.UTF-8
LC_TIME=ru_RU.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=ru_RU.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=ru_RU.UTF-8
LC_NAME=ru_RU.UTF-8
LC_ADDRESS=ru_RU.UTF-8
LC_TELEPHONE=ru_RU.UTF-8
LC_MEASUREMENT=ru_RU.UTF-8
LC_IDENTIFICATION=ru_RU.UTF-8
LC_ALL=

function sign(id, dataToSign) {
    dataToSign = "Hello world";
    dataToSign = window.btoa(dataToSign);
    console.log(dataToSign);
    return new Promise(function(resolve, reject){
        cadesplugin.async_spawn(function *(args) {
            try {
                var oStore = yield cadesplugin.CreateObjectAsync("CAPICOM.Store");
                yield oStore.Open(CAPICOM_CURRENT_USER_STORE, CAPICOM_MY_STORE,
                    CAPICOM_STORE_OPEN_MAXIMUM_ALLOWED);

                var CertificatesObj = yield oStore.Certificates;

                var oCertificate = yield CertificatesObj.Item(id);

                var oSigner = yield cadesplugin.CreateObjectAsync("CAdESCOM.CPSigner");
                yield oSigner.propset_Certificate(oCertificate);

                var oSignedData = yield cadesplugin.CreateObjectAsync("CAdESCOM.CadesSignedData");
                yield oSignedData.propset_Content(dataToSign);

                var sSignedMessage = yield oSignedData.SignCades(oSigner, CADESCOM_CADES_BES, false);

                yield oStore.Close();

                args[2](sSignedMessage);
            }
            catch (err)
            {
                args[3](cadesplugin.getLastError(err));
            }
        }, id, dataToSign, resolve, reject);
    });
}