Create procedure to sign XML data for government -- 2

For communication with government I need to create procedure for signing XML file by qualified certificate to PKCS#7 version 1.5 (RFC 2315) in DER format (ITU-T Recommendation X.690). Content of PKCS#7 object that represent data will be of type "signedData". Procedure can use any publicly available free tools that can run on Win32 ( like openSSL etc would be nice if possible). Test can be run calling REST POST to https://adisepo.mfcr.cz/adistc/epo_podani?test=1 and result will be always error due to data are syntetic and your certificate is not recognized but goal is that error will not be "[Nastala chyba při práci s PKCS#7 objektem.]" whitch means signature format error. Test data are in attachment