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+.. _mozilla_projects_nss_reference_fc_unwrapkey:
+
+FC_UnwrapKey
+============
+
+`Name <#name>`__
+~~~~~~~~~~~~~~~~
+
+.. container::
+
+   FC_UnwrapKey - unwrap a key
+
+`Syntax <#syntax>`__
+~~~~~~~~~~~~~~~~~~~~
+
+.. container::
+
+   .. code:: eval
+
+      CK_RV FC_UnwrapKey(
+        CK_SESSION_HANDLE hSession,
+        CK_MECHANISM_PTR pMechanism,
+        CK_OBJECT_HANDLE hUnwrappingKey,
+        CK_BYTE_PTR pWrappedKey,
+        CK_ULONG usWrappedKeyLen,
+        CK_ATTRIBUTE_PTR pTemplate,
+        CK_ULONG usAttributeCount,
+        CK_OBJECT_HANDLE_PTR phKey
+      );
+
+`Parameters <#parameters>`__
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. container::
+
+   ``hSession``
+      [in] session handle.
+   ``pMechanism``
+      [in] pointer to the mechanism to use.
+   ``hUnwrappingKey``
+      [in] handle of the ket to use for unwrapping.
+   ``pWrappedKey``
+      [in] pointer to the wrapped key.
+   ``usWrappedKeyLen``
+      [in] length of the wrapped key.
+   ``pTemplate``
+      [in] pointer to the list of attributes for the unwrapped key.
+   ``usAttributeCount``
+      [in] number of attributes in the template.
+   ``phKey``
+      [out] pointer to the location to receive the handle of the unwrapped key.
+
+`Description <#description>`__
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. container::
+
+   ``FC_UnwrapKey`` unwraps (decrypts) a key and creates a new key opbject. If ``pWrappedKey`` is
+   NULL the length of the wrapped key is returned in ``pusWrappedKeyLen`` and FC_UnwrapKey may be
+   called again with ``pWrappedKey`` set to retrieve the wrapped key.
+
+   A user must log into the token (to assume the NSS User role) before calling ``FC_UnwrapKey``.
+
+.. _return_value:
+
+`Return value <#return_value>`__
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. container::
+
+`Examples <#examples>`__
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. container::
+
+.. _see_also:
+
+`See also <#see_also>`__
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. container::
+
+   -  `NSC_UnwrapKey </en-US/NSC_UnwrapKey>`__
+\ No newline at end of file