SSL: CERTIFICATE_VERIFY_FAILED error

[Zisha Weinstock]

We've been using the Python google-ads library for a while now from behind our corporate firewall and it was working fine until yesterday.  

Last time it worked was yesterday 7/25/22 at 12:30pm EDT then at 1:30pm we started getting the following error:

Exception: HTTPSConnectionPool(host='accounts.google.com', port=443): Max retries exceeded with url: /o/oauth2/token (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1131)'))) at 2022-07-26 17:43:49 HTTPSConnectionPool(host='accounts.google.com', port=443): Max retries exceeded with url: /o/oauth2/token (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1131)')))
Traceback (most recent call last):
  File "/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py", line 703, in urlopen
    httplib_response = self._make_request(
  File "/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py", line 386, in _make_request
    self._validate_conn(conn)
  File "/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py", line 1040, in _validate_conn
    conn.connect()
  File "/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/connection.py", line 414, in connect
    self.sock = ssl_wrap_socket(
  File "/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/util/ssl_.py", line 449, in ssl_wrap_socket
    ssl_sock = _ssl_wrap_socket_impl(
  File "/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/util/ssl_.py", line 493, in _ssl_wrap_socket_impl
    return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
  File "/opt/rh/rh-python38/root/usr/lib64/python3.8/ssl.py", line 500, in wrap_socket
    return self.sslsocket_class._create(
  File "/opt/rh/rh-python38/root/usr/lib64/python3.8/ssl.py", line 1040, in _create
    self.do_handshake()
  File "/opt/rh/rh-python38/root/usr/lib64/python3.8/ssl.py", line 1309, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1131)

Our security people are saying that nothing changed on our end. Was there any change in that time period on Google's end?

[Google Ads API Forum Advisor]

Hi Zisha,

Thank you for reaching us out. I am Sherwin from Google Ads API support team. I hope that you are doing well today.

The error you're encountering doesn't seem to be Google Ads API specific. You could try to report an issue to the googleads-python-lib issue tracker as the client library owners are better equipped to help on this concern.

Kind regards,

Sherwin Vincent Google Ads API Team

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