[Python-Dev] PEP 476: Enabling certificate validation by default!

martin at v.loewis.de martin at v.loewis.de
Sat Aug 30 22:03:20 CEST 2014

Zitat von Christian Heimes <christian at python.org>:

> On 30.08.2014 17:22, Alex Gaynor wrote:
>> The Windows certificate store is used by ``load_default_certs``:
>> * https://github.com/python/cpython/blob/master/Lib/ssl.py#L379-L381
>> * https://docs.python.org/3.4/library/ssl.html#ssl.enum_certificates
> The Windows part of load_default_certs() has one major flaw: it can only
> load certificates that are already in Windows's cert store. However
> Windows comes only with a small set of default certs and downloads more
> certs on demand. In order to trigger a download Python or OpenSSL would
> have to use the Windows API to verify root certificates.

It's better than you think. Vista+ has a weekly prefetching procedure that
should assure that virtually all root certificates are available:


BTW, it's patented:



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