Сведения об исключении: System.AccessViolationException
в CAdESCOM.CadesSignedDataClass.EnhanceCades(CAdESCOM.CADESCOM_CADES_TYPE, System.String, CAdESCOM.CAPICOM_ENCODING_TYPE)

Имя сбойного модуля: cadescom.dll, версия: 2.0.13600.0, метка времени: 0x637b8055
Код исключения: 0xc0000005
Смещение ошибки: 0x003d43ee
Путь сбойного модуля: C:\Program Files (x86)\Common Files\Crypto Pro\Shared\cadescom.dll

byte[] signature= файл подписи.
string TSAAddress = адрес TSA сервера

var signedData = new CAdESCOM.CadesSignedData();
CAdESCOM.CADESCOM_CADES_TYPE? cadesType = CAdESCOM.CADESCOM_CADES_TYPE.CADESCOM_CADES_T;
signedData.ContentEncoding = CAdESCOM.CADESCOM_CONTENT_ENCODING_TYPE.CADESCOM_BASE64_TO_BINARY;
signedData.Content = Convert.ToBase64String(signature);
SignedCms cms = new SignedCms();
cms.Decode(signature);
var contentObject = cms.SignerInfos[0].SignedAttributes.Cast<CryptographicAttributeObject>()
.FirstOrDefault(e => e.Oid.Value == Consts.CryptOID.MESSAGE_DIGEST);

CAdESCOM.CPHashedData hd = new CAdESCOM.CPHashedData();
hd.DataEncoding = CAdESCOM.CADESCOM_CONTENT_ENCODING_TYPE.CADESCOM_BASE64_TO_BINARY;
hd.Algorithm = (CAPICOM.CAPICOM_HASH_ALGORITHM)101;

string hashedString = BitConverter.ToString(((Pkcs9MessageDigest)contentObject.Values[0]).MessageDigest).Replace("-", string.Empty);
hd.SetHashValue(hashedString);

signedData.VerifyHash(hd, Convert.ToBase64String(signature), CAdESCOM.CADESCOM_CADES_TYPE.CADESCOM_CADES_BES);

//усиляем подпись до указанного типа
var extendedSignature = Convert.FromBase64String(signedData.EnhanceCades(cadesType.Value, TSAAddress, CAdESCOM.CAPICOM_ENCODING_TYPE.CAPICOM_ENCODE_BASE64));