Hi John, I think you want https://twistedmatrix.com/documents/20.3.0/api/twisted.internet.ssl.Certific... <https://twistedmatrix.com/documents/20.3.0/api/twisted.internet.ssl.Certific...>, specifically, you want to pass the "raiseMinimumTo" parameter, Hope this helps, L. Daniel Burr
On Aug 31, 2020, at 10:47 AM, John Aherne <johnaherne@rocs.co.uk> wrote:
I'm using twisted 20.3 and python3.6.8 and Windows 10
I'm using endpoint_description with a tac file to start up a server.
But I need to disable tls 1.0 and 1.1.
I was hoping to find a parameter I could pass in to make the system only recognise 1.2 and 1.3. But could not find anything that would do that. I thought sslmethod would be what I wanted but that is limited to :
Must be one of: "SSLv23_METHOD", "SSLv2_METHOD", "SSLv3_METHOD", "TLSv1_METHOD".
If I choose TLSv1_METHOD, TLS1.0 and 1.1 are still enabled and QUALYS complains and downgrades the rating to B
In the end I found _defaultMinimumTLSVersion in _sslverify.py.
I set this to TLSVersion.TLSv1_2 and that seemed to do the trick.
But I don't think I should be doing that. I think I've missed some obvious place where I can pass in a value to change this.
Anyone know where I should be looking.
Thanks for any info
-- John Aherne
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