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.. _mozilla_projects_nss_reference_fc_signupdate:
FC_SignUpdate
=============
`Name <#name>`__
~~~~~~~~~~~~~~~~
.. container::
FC_SignUpdate - process the next block of a multi-part signing operation.
`Syntax <#syntax>`__
~~~~~~~~~~~~~~~~~~~~
.. container::
.. code::
CK_RV FC_SignUpdate(
CK_SESSION_HANDLE hSession,
CK_BYTE_PTR pPart,
CK_ULONG usPartLen
);
`Parameters <#parameters>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
``hSession``
[in] session handle.
``pPart``
[in] pointer to the next block of the data to be signed.
``usPartLen``
[in] length of data block in bytes.
`Description <#description>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
``FC_SignUpdate`` starts or continues a multi-part signature operation. One or more blocks may be
part of the signature. The signature for the entire message is returned by a call to
:ref:`mozilla_projects_nss_reference_fc_signfinal`.
A user must log into the token (to assume the NSS User role) before calling ``FC_SignUpdate``.
.. _return_value:
`Return value <#return_value>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
`Examples <#examples>`__
~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
.. _see_also:
`See also <#see_also>`__
~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
- :ref:`mozilla_projects_nss_reference_fc_signinit`,
:ref:`mozilla_projects_nss_reference_fc_signfinal`, `NSC_SignUpdate </en-US/NSC_SignUpdate>`__