We need to be able to work with an encrypted private key in "DER-encoded encrypted PKCS8" format.

Specifically, to import and decrypt the key using the provided password, convert and save it to XmlString format.

Furthermore, use the key to sign the data using RSACryptoServiceProvider, SHA512 hash function, PKCS#1 v1.5 padding

In the BC22 System Application, there are appropriate codeunits 1474 "Signature Key" and 1266 "Cryptography Management", but they do not provide these functions.

The idea is to add new procedures to these codeunits to enable the desired functionality.