[Python] Apple Store Server Notification: Python OpenSSL certificate loading fails in "header...

On my django server, I'm trying to decode the JWT content sent by the Apple Store Server Notification using Apple's package app-store-server-library-python.

Under the official documentation, when starting to do the verification and decoding, we find this line:

root_certificates = load_root_certificates()


The implementation is not provided unfortunately. By looking here and there, I've tried several implementations that always fail in :

OpenSSL.crypto.Error: [('asn1 encoding routines', '', 'header too long')]
​

Here is my implementation:

def load_root_certificates():
in_file = open("AppleRootCA-G3.cer", "rb")
data = in_file.read()
in_file.close()
return load_certificate(FILETYPE_ASN1, data)


What could be the cause of the issue here? Thanks for the help!

Continue reading...