Active Authentication on passport with BrainpoolP320r1

#!/bin/python
from pypassport import epassport, reader
from pypassport import fingerPrint
from pypassport.doc9303 import converter
import os
import base64
from ecdsa import VerifyingKey, BRAINPOOLP320r1
from hashlib import sha256

MRZ = ""
r = reader.ReaderManager().waitForCard(10)
ep = epassport.EPassport(r, MRZ)

ep.doBasicAccessControl()

data = b'hahahaha'
signature = ep._iso7816.internalAuthentication(data)
public = ep._getDG(15).body

# Public key must be extracted from ASN1 structure in public
vk = VerifyingKey.from_string(str(bytearray.fromhex("BA84829F88E4FB32CCE40FD11BD324A1333CD4C2D22F20A764B8ED7F35D28F3683670A1F7877468A35F773AB8B88E565F28C9C878BE1E60C5A3A6D0C1D4BB261AB7D8A2E7F9077627C3AXXXXXXXXXXXX")), curve=BRAINPOOLP320r1)
print vk.verify(signature, data, hashfunc=sha256) # True