Chilkat v18.104.22.168 will include features to make it easy to generate XAdES-BES and XAdES-EPES signatures for electronic invoicing and tax reporting for many countries.
The goal is to provide an easy and inexpensive solution for these complicated requirements. Chilkat has been working with customers in Spain, Italy, Hungary, India, Brazil, Costa Rica, and elsewhere to get things working smoothly. (Contact Matt at firstname.lastname@example.org for more information.)
The vision is to offer an online tool that generates the solution (source code) given a sample of already-signed XML. This tool is live and functioning at https://tools.chilkat.io/xmlDsigGen.cshtml. The tool can generate code in any of approximately 30 different programming languages. The tool will be updated and refined as Chilkat solves issues and challenges brought by the requirements of new customers. XML digital signatures can be tricky, fragile, brittle, and different implementations for checking the validity of a signature can be quirky, have undocumented requirements, etc. The idea is to build into the code generation tool the expertise for knowing the particular needs of different authorities, so you don’t have to spend weeks of frustration in getting things to work.
As time passes, and as more expertise is embodied within the code generation tool, I believe Chilkat can reach the point where it “just works”.