function Sign() {        
        var oCertificate = oCertificates.Item(1);

        var oSigner = CreateObject("CAdESCOM.CPSigner");
        oSigner.TSAAddress = "https://www.cryptopro.ru/tsp/";
        oSigner.Certificate = oCertificate;
        oSigner.Options = CAPICOM_CERTIFICATE_INCLUDE_WHOLE_CHAIN;
        
        var oHashedData = CreateObject("CAdESCOM.HashedData");
        oHashedData.Algorithm = CADESCOM_HASH_ALGORITHM_CP_GOST_3411;
        oHashedData.DataEncoding = CADESCOM_BASE64_TO_BINARY;  // вот это по-моему тут не нужно
        oHashedData.SetHashValue('@Model.Hash');
        
        var oSignedData = CreateObject("CAdESCOM.CadesSignedData");

        var sSignedMessage = "";
        try {
            sSignedMessage = oSignedData.SignHash(oHashedData, oSigner);
        } catch (err) {
            return;
        }
        
        var verifyResult = Verify(sSignedMessage);
        
         if (verifyResult.Result) {
            alert('ok');
        }
        else {
            alert('Ошибка проверки: ' + verifyResult.Error);
        }
    }
    
    function Verify(sSignedMessage) {
        var oHashedData = CreateObject("CAdESCOM.HashedData");
        oHashedData.Algorithm = CADESCOM_HASH_ALGORITHM_CP_GOST_3411;
        oHashedData.DataEncoding = CADESCOM_BASE64_TO_BINARY;
        oHashedData.SetHashValue('@Model.Hash');
        
        var oSignedData = CreateObject("CAdESCOM.CadesSignedData");
        
        // Проверяем подпись
        try {
            oSignedData.VerifyHash(oHashedData, sSignedMessage);
        } catch (err) {
            return { Result: false, Error: "Failed to verify signature. Error: " + GetErrorMessage(err)};
        }

        return { Result: true, Content: oSignedData.Content };
    }

        public bool VerifyData(byte[] originalData, byte[] signedData)
        {
            var signedCms = new SignedCms(new ContentInfo(originalData), true);
            try
            {
                signedCms.Decode(signedData);
            }
            catch(Exception e)
            {
                Logger.Log.Error("Signed CMS decode error", e);
                return false;
            }
            
            SignerInfoEnumerator enumerator = signedCms.SignerInfos.GetEnumerator();
            while (enumerator.MoveNext())
            {
                SignerInfo current = enumerator.Current;
                lastSigner = current;
                if (current.Certificate != null && current.Certificate.PublicKey != null 
                    && current.Certificate.PublicKey.Oid.Value != OID_GostR3410_2001_CryptoPro_PublicKey)
                {
                    return false;
                }
                
                try
                {
                    var cerBytes = File.ReadAllBytes(@"C:\myCert.cer");
                    var cer = new X509Certificate2(cerBytes);
                    
                    current.CheckSignature(new X509Certificate2Collection(cer), true); // вот тут ошибка "Неправильное значение хеша"
                }
                catch (System.Security.Cryptography.CryptographicException e)
                {
                    return false;
                }
            }
        }

            var cerBytes = File.ReadAllBytes(@"C:\abdula.cer");
            var cer = new X509Certificate2(cerBytes);

            Gost3410CryptoServiceProvider prov = (Gost3410CryptoServiceProvider)cer.PublicKey.Key;
            var b = prov.VerifyHash(originalData, signedData);
 

const string OID_id_aa_ets_certValues = "1.2.840.113549.1.9.16.2.23";

                    foreach (var unsignedAttribute in current.UnsignedAttributes)
                    {
                        if (unsignedAttribute.Oid.Value == OID_id_aa_ets_certValues)
                        {
                            foreach (AsnEncodedData value in unsignedAttribute.Values)
                            {
                                System.IO.File.WriteAllBytes(@"C:\attr.bin", value.RawData);
                            }
                        }
                    }