Public bug reported:
On Ubuntu 22.04 with dput version 1.1.0ubuntu2.1, and python3 3.10.x,
customers using a self-signed SSL for https are getting the following:
File "/usr/bin/dput", line 37, in <module>
sys.exit(load_entry_point('dput==1.1.0+ubuntu2.1', 'console_scripts',
'execute-dput')())
File "/usr/share/dput/dput/dput.py", line 1235, in main
upload_methods[method](
File "/usr/share/dput/dput/methods/https.py", line 18, in upload
return http.upload(
File "/usr/share/dput/dput/methods/http.py", line 138, in upload
conn.endheaders()
File "/usr/lib/python3.10/http/client.py", line 1278, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.10/http/client.py", line 1038, in _send_output
self.send(msg)
File "/usr/lib/python3.10/http/client.py", line 976, in send
self.connect()
File "/usr/lib/python3.10/http/client.py", line 1455, in connect
self.sock = self._context.wrap_socket(self.sock,
File "/usr/lib/python3.10/ssl.py", line 513, in wrap_socket
return self.sslsocket_class._create(
File "/usr/lib/python3.10/ssl.py", line 1100, in _create
self.do_handshake()
File "/usr/lib/python3.10/ssl.py", line 1371, in do_handshake
self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate
verify failed: self-signed certificate (_ssl.c:1007)
This seems to be an issue in how the SSL for the https connection is
validated. Even after adding the self-signed certificate to the trust
store with update-ca-certificates, this is not being read by the python
code for validation of the cert on the mirror.
The immediate solution has been to modify the main dput file to import
the ssl library, and tell it to not validate the certificate for the
connection:
import ssl
ssl._create_default_https_context = ssl._create_unverified_context
This is discussed further at the following link:
https://stackoverflow.com/questions/77639570/ssl-verification-problem-
when-uploading-a-deb-package-using-dput
This seems like a change in python behavior given this discussion:
https://stackoverflow.com/questions/35569042/ssl-certificate-verify-
failed-with-python3
I am not sure what the best path forward is, I would think that ideally
there may be an environment variable to tell python to read the
certificate from the standard trust-store /etc/ssl/certs/ca-
certificates.crt, or otherwise to skip certificate validation, without
needing to modify dput directly.
I do not see this happening on 20.04 with python 3.8.x and dput
1.0.3ubuntu1.1, so this seems to be a relatively recent change in
behavior.
** Affects: dput (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2055450
Title:
Uploading package to server with self-signed certificate on https
fails despite adding cert to trust-store
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