FC_DigestKey - add the digest of a key to a multi-part digest operation.
- [in] session handle.
- [in] handle of the key to be digested.
FC_DigestKey continues a multi-part digest operation by digesting the value of a secret key. The digest for the entire message is returned by a call to FC_DigestFinal.
A user must log into the token (to assume the NSS User role) before calling