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Re: [openpgp] Scoped trust (signatures)

2018-06-01 09:30:32

On Jun 1, 2018, at 12:25 AM, Jon Callas <joncallas(_at_)icloud(_dot_)com> 
wrote:

...

Does “example.com” match “mail.example.com”? Either yes or no is completely 
reasonable. Does “*.example.com” (which obviously matches “mail.example.com") 
match “example.com”? In this case, I think that the answer is yes, but gentle 
persons can disagree. I’d just roll my eyes if you said no, because yeah, 
sure, there’s no problem in having your list of domains have both 
“example.com” and “*.example.com” to be explicit about it. I see the point.


Matching domains is indeed hard, but people are working on it. You may want to 
check the list of public prefixes maintained by Mozilla et al as an open source 
project:

https://github.com/publicsuffix/list

-- Christian Huitema 
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