Усовершенствование подписи CAdES-BES (низкоуровневые функции)

    HCRYPTMSG hMsg = CryptMsgOpenToDecode(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
        0,0,0,0,0);
    if(!hMsg)
    {
        std::cout << "CryptMsgOpenToDecode() failed" << std::endl;
        return empty;
    }

    if(!CryptMsgUpdate(hMsg,&message[0],(DWORD)message.size(),TRUE))
    {
        CryptMsgClose(hMsg);
        std::cout << "CryptMsgUpdate() failed" << std::endl;
        return empty;
    }

    // Усовершенствование подписи CAdES-BES  до CAdES-X Long Type 1
    CADES_SIGN_PARA signPara = { sizeof(signPara) };
    signPara.dwCadesType = CADES_X_LONG_TYPE_1;

    if(!CadesMsgEnhanceSignature(hMsg, 0, &signPara))
    {
        CryptMsgClose(hMsg);
        std::cout << "CadesMsgEnhanceSignature() failed" << std::endl;
        return empty;
    }

    DWORD size = 0;
    if(!CryptMsgGetParam(hMsg,CMSG_ENCODED_MESSAGE,0,0,&size))
    {
        CryptMsgClose(hMsg);
        std::cout << "CryptMsgGetParam() failed" << std::endl;
        return empty;
    }

    message.resize(size);
    if(!CryptMsgGetParam(hMsg,CMSG_ENCODED_MESSAGE,0,&message[0],&size))
    {
        CryptMsgClose(hMsg);
        std::cout << "CryptMsgGetParam() failed" << std::endl;
        return empty;
    }

    if(!CryptMsgClose(hMsg))
    {
        std::cout << "CryptMsgClose() failed" << std::endl;
        return empty;
    }

    std::cout << "Signature was enhanced successfully." << std::endl;

    return message;