HCRYPTPROV hCryptProv = NULL;
			if (!CryptAcquireContext(&hCryptProv, "SENDER", CP_GR3410_2001_PROV, PROV_GOST_2001_DH, 0))
			{
				SetError("CryptAcquireContext");
				return false;
			}

			CMSG_ENVELOPED_ENCODE_INFO eInfo = { sizeof(eInfo) };
			eInfo.hCryptProv = hCryptProv;

			eInfo.ContentEncryptionAlgorithm.pszObjId = szOID_CP_GOST_28147;
			eInfo.pvEncryptionAuxInfo = NULL;

			// указатель на контекст сертификата
			auto pCertContext = reinterpret_cast<PCCERT_CONTEXT>(recipientCertificate->Handle.ToPointer());
			PCERT_INFO pCertInfo = pCertContext->pCertInfo;

			eInfo.cRecipients = 1;
			eInfo.rgpRecipients = &pCertInfo;

			HCRYPTMSG hMsg = CryptMsgOpenToEncode(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
				0, CMSG_ENVELOPED, &eInfo, NULL, NULL);

			if (!hMsg)
			{
				SetError("CryptMsgOpenToEncode");
				return false;
			}

			auto buffer = gcnew array<byte>(inputStream->Length);
			inputStream->Read(buffer, 0, inputStream->Length);
			pin_ptr<byte> pBuffer = &(buffer[0]);

			if (!CryptMsgUpdate(hMsg, pBuffer, buffer->Length, true))
			{
				SetError("CryptMsgUpdate");
				CryptMsgClose(hMsg);
				return false;
			}

			DWORD cbData;

			if (!CryptMsgGetParam(hMsg, CMSG_CONTENT_PARAM, 0, NULL, &cbData))
			{
				SetError("CryptMsgGetParam(CMSG_CONTENT_PARAM)'0");
				CryptMsgClose(hMsg);
				return false;
			}

			auto outputBuffer = gcnew array<byte>(cbData);
			pin_ptr<byte> pbData = &(outputBuffer[0]);

			if (!CryptMsgGetParam(hMsg, CMSG_CONTENT_PARAM, 0, pbData, &cbData))
			{
				SetError("CryptMsgGetParam(CMSG_CONTENT_PARAM)'1");
				CryptMsgClose(hMsg);
				return false;
			}

			outputStream->Write(outputBuffer, 0, outputBuffer->Length);
			outputStream->Flush();

			CryptMsgClose(hMsg);