How to sign data in the database using an EDS on a plastic card?

Question

Database

There is a plastic card (for example, a plastic compulsory medical insurance policy), which has an EDS. How to sign data in the database using a plastic card, namely an EDS?

Answer 1

1) find out which crypto provider created the private key stored on the card; if necessary, install it on the client
2) decide which signature you are interested in - attached or detached
3) select the desired format (for example, PKCS # 7)
4) read data on the client, ask the crypto provider to sign the memory block, write the result to the database or back ( attached) or into a separate column (detached
) no crypto provider will allow you to send a private key to the server.