Ah, this looks good!
Interestingly, while this works in the sage notebook, changing it in the
module results in an
sage: from sage.crypto.linearlayer import LinearLayerFactory
sage: LinearLayerFactory(GF(2))(MatrixSpace(GF(2), 2, 2), [1,0,0,1])
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-2-a15c8df99933> in <module>()
----> 1 LinearLayerFactory(GF(Integer(2)))(MatrixSpace(GF(Integer(2)),
Integer(2), Integer(2)), [Integer(1),Integer(0),Integer(0),Integer(1)])
/home/asante/werkstatt/werkbank/sage/local/lib/python2.7/site-packages/sage/
crypto/linearlayer.pyc in LinearLayerFactory(K)
53 def LinearLayerFactory(K):
54 if K.characteristic() == 2 and K.degree() == 1:
---> 55 return type("LinearLayerGF2", (LinearLayer,
Matrix_mod2_dense), {})
56 if K.characteristic() == 2 and K.degree() >= 1:
57 return type("LinearLayerGF2E", (LinearLayer,
Matrix_gf2e_dense), {})
TypeError: metaclass conflict: the metaclass of a derived class must be a (
non-strict) subclass of the metaclasses of all its bases
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