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From Branko Čibej <br...@apache.org>
Subject Re: What is the permissible character set for @group references in path-based auth?
Date Sun, 15 Dec 2019 00:52:10 GMT
On 14.12.2019 14:08, sebb wrote:
> On Sat, 14 Dec 2019 at 12:03, Daniel Shahaf <d.s@daniel.shahaf.name
> <mailto:d.s@daniel.shahaf.name>> wrote:
>
>     sebb wrote on Sat, 14 Dec 2019 09:12 +00:00:
>     > The only documentation I could find [1] defines a key using
>     <text-char>:
>     >
>     > <text-char> ::= (any character except <LF>)
>     >
>     > However the character domain is not specified as far as I can tell.
>
>     I don't know where you're quoting that from.  It's not on the linked
>     page or anywhere else that I can find.  It's also patently false
>     because '=' and ' '
>     can't be parts of a group name, because if they were then «@foo =
>     rw» would
>     be misparsed.
>
>
> I should have been clearer.
> I did not mean that a key consists of text-char only.
>
> The key is defined in BNF in the Formal Definition section (once opened).
> Follow the BNF through, and one of refs is <text-char>:
>
> key => key-cont => key-char => text-char
> (where => means refers to)
>
> i.e. the key definition uses text-char.
>
> So in order to know what is allowed in a key, one needs to know what a
> character is.

So what exactly is missing from the definition: "any character except <LF>"?

Subversion doesn't define the source character set. It does implicitly
expect it to be a superset of ASCII, and uses UTF-8 internally. That
document intentionally doesn't define what a "character" is except for
special codes that the parser recognizes as delimiters, depending on
context.

-- Brane


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