[docs] [issue19940] ssl.cert_time_to_seconds() returns wrong results if local timezone is not UTC

akira report at bugs.python.org
Tue Dec 10 22:37:28 CET 2013

akira added the comment:


There is also an issue with the current strptime format [1] (`"%b %d %H:%M:%S %Y GMT"`). It is locale-dependent and it may fail if a non-English locale is in effect. I don't know whether I should open a new issue on this or are you going to fix it too.

`cert_time_to_seconds()` is documented [2] to parse notBefore, notAfter fields from a certificate. As far as I can tell they do not depend on current locale. Thus the following code should not fail:

    >>> timestr = "May  9 00:00:00 2007 GMT"
    >>> import ssl
    >>> ssl.cert_time_to_seconds(timestr)
    >>> import locale
    >>> locale.setlocale(locale.LC_TIME, 'pl_PL.utf8')
    >>> ssl.cert_time_to_seconds(timestr)
    Traceback (most recent call last):
    ValueError: time data 'May  9 00:00:00 2007 GMT' does not match format '%b %d %H:%M:%S %Y GMT'

[1]: http://hg.python.org/cpython/file/96a68e369d13/Lib/ssl.py#l849
[2]: http://hg.python.org/cpython/file/96a68e369d13/Doc/library/ssl.rst#l359


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