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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:: eval
+
+      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>`__
+\ No newline at end of file