in lambda-bulk-importer/main.py [0:0]
def get_name_from_certificate(certificateId):
response = iot_client.describe_certificate(certificateId=certificateId)
certificateText = response["certificateDescription"].get("certificatePem")
certificateObj = x509.load_pem_x509_certificate(data=certificateText.encode('ascii'), backend=default_backend())
cn = certificateObj.subject.get_attributes_for_oid(NameOID.COMMON_NAME)[0].value
# spaces are evil
cn = "".join(cn.split())
print("Common name to be Thing Name: [" + cn + "]")
return cn