async_code.js

function SignCadesBES_Async_File(certListBoxId, dataToSign, onSign, onError) {
    cadesplugin.async_spawn(function* (arg) {
        var e = document.getElementById(arg[ 0 ]);
        var selectedCertID = e.selectedIndex;
        if (selectedCertID == -1) {
            alert("Select certificate");
            return;
        }
        var certificate = global_selectbox_container[ selectedCertID ];
        var Signature;
        try {
            //FillCertInfo_Async(certificate);
            var errormes = "";
            try {
                var oSigner = yield cadesplugin.CreateObjectAsync("CAdESCOM.CPSigner");
            } catch (err) {
                errormes = "Failed to create CAdESCOM.CPSigner: " + err.number;
                throw errormes;
            }

            if (oSigner) {
                yield oSigner.propset_Certificate(certificate);

            }
            else {
                errormes = "Failed to create CAdESCOM.CPSigner";
                throw errormes;
            }

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

            var CADES_BES = 1;

            if (dataToSign) {
                // Данные на подпись ввели
                yield oSignedData.propset_ContentEncoding(cadesplugin.CADESCOM_BASE64_TO_BINARY); //CADESCOM_BASE64_TO_BINARY
                yield oSignedData.propset_Content(dataToSign);
                yield oSigner.propset_Options(1); //CAPICOM_CERTIFICATE_INCLUDE_WHOLE_CHAIN
                try {
                    Signature = yield oSignedData.SignCades(oSigner, CADES_BES, true);
                }
                catch (err) {
                    errormes = "Не удалось создать подпись из-за ошибки: " + cadesplugin.getLastError(err);
                    throw errormes;
                }
            }
            var pubKeyPr = yield certificate.PublicKey();
            var key = yield pubKeyPr.EncodedKey;
            var keyV = yield key.Value();
            onSign(Signature, keyV);
        }
        catch (err) {
            onError(err)
        }
    }, certListBoxId); //cadesplugin.async_spawn
}