FC_SignInit - initialize a signing operation.
CK_RV FC_SignInit( CK_SESSION_HANDLE hSession, CK_MECHANISM_PTR pMechanism, CK_OBJECT_HANDLE hKey );
hSessionpMechanismhKeyFC_SignInit initializes a signature operation.
A user must log into the token (to assume the NSS User role) before calling FC_SignInit.