CK_RV FC_GetOperationState( CK_SESSION_HANDLE hSession, CK_BYTE_PTR pOperationState, CK_ULONG_PTR pulOperationStateLen );
[in] handle of the open session.
[out] pointer to a byte array of a length sufficient for containing the operation state or NULL.
[out] pointer to CK_ULONG which receives the total length (in bytes) of the operation state.
FC_GetOperationState saves the state of the cryptographic operation in a session. This
function only works for digest operations for now. Therefore, a user may call
FC_GetOperationState without logging into the token (to assume the NSS User role).