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.. _mozilla_projects_nss_reference_fc_decryptupdate:
FC_DecryptUpdate
================
`Name <#name>`__
~~~~~~~~~~~~~~~~
.. container::
FC_DecryptUpdate - decrypt a block of a multi-part encryption operation.
`Syntax <#syntax>`__
~~~~~~~~~~~~~~~~~~~~
.. container::
.. code::
CK_RV FC_DecryptUpdate(
CK_SESSION_HANDLE hSession,
CK_BYTE_PTR pEncryptedPart,
CK_ULONG usEncryptedPartLen,
CK_BYTE_PTR pPart,
CK_ULONG_PTR pusPartLen
);
`Parameters <#parameters>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
``hSession``
[in] session handle.
``pEncryptedPart``
[in] pointer to the next block of data to be decrypted.
``usEncryptedPartLen``
[in] length of data block in bytes.
``pPart``
[out] pointer to location where recovered block is to be stored.
``pusPartLen``
[in,out] pointer the location where the number of bytes of recovered data is to be stored.
`Description <#description>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
``FC_DecryptUpdate`` decrypts a block of data according to the attributes of the previous call to
``FC_DecryptInit``. The block may be part of a multi-part decryption operation.
A user must log into the token (to assume the NSS User role) before calling ``FC_DecryptUpdate``.
.. _return_value:
`Return value <#return_value>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
`Examples <#examples>`__
~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
.. _see_also:
`See also <#see_also>`__
~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
- :ref:`mozilla_projects_nss_reference_fc_decryptinit`,
`NSC_DecryptUpdate </en-US/NSC_DecryptUpdate>`__