>> So it's IMO fine to say ".onion addresses are case-insensitive and
>> will comply with existing DNS limitations for label lengths (63) and
>> maximum fqdn lengths (253ish)".
>> Which contradicts draft-lewis-domain-names-00
> 
> 
> So - and not to be pointed - but in your email I reference, should I ignore 
> that for the sake of this document?  I mean what the message says seems to 
> contradict what you are quoting from Mathewson - which is fine - but this is 
> something unclear to me.


Yes, you should ignore that text.

Nick is the engineer at Tor who implements the relevant code.

In the following, he provides the following undertaking:

https://lists.torproject.org/pipermail/tor-dev/2015-August/009275.html 
<https://lists.torproject.org/pipermail/tor-dev/2015-August/009275.html>

> The examples in Proposal 224 are a mere 53 characters long leaving 10 to
> play with for padding-hyphens and possibly checksum characters.
>
> Nick: Is this likely to need to change? Or might there be a need to encode >
> 315 bits / 63 chars total?

I don't anticipate this changing.

If there were ever a need to encode more than that number of bits,
we'd add an extra label.

So, .onion addresses will stay within DNS bounds.  :-)

    - alec

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