Display public key info after generation

We can demonstrate how to use the C_GetAttributeValue call in the generation sample. This should provide basic info on how to retrieve information about public keys. Customers can use this as a basis for getting information about all their other keys as well.

Start with the generation sample and the existing C_GetAttributeValue usage or surrounding code. Determine which basic public-key attributes the sample should retrieve and display after generation. Done means the sample demonstrates public-key information retrieval clearly enough for customers to adapt to other keys.

Written by the indexing model from the issue text.