[exim] Re: De-Tainting in a filter-file?

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Autor: Niels Kobschätzki
Datum:  
To: Niels Kobschätzki via Exim-users, Jeremy Harris
Betreff: [exim] Re: De-Tainting in a filter-file?
> Niels Kobschätzki via Exim-users <exim-users@???> hat am 25.07.2023 09:07 CEST geschrieben:
>
>
> > Jeremy Harris via Exim-users <exim-users@???> hat am 21.07.2023 11:25 CEST geschrieben:
> >
> >
> > On 21/07/2023 09:39, Niels Kobschätzki via Exim-users wrote:
> > > When I start to quote that it won't work. I tried '$h_From:' and wrapping ${address:$h_FROM:} and wrapping ${lc:${address:$h_From:}} but those resulted all in a deferral iirc because the search query was broken.
> >
> > Show the debug.
> >
> > > But maybe I understand quoting wrong in this context. Do you mean wrapping it in ' or do you mean using "quote_ldap"?
> >
> > The latter.
>
> I set a header like this:
> From: test blacklist <test-blacklist@???>
>
> Without quote_ldap it results in an ldap-query that has this part:
> ldap://...(|(mailBlackList=test-blacklist@???)...
>
> I quoted now: (mailBlackList=${lc:${address:${quote_ldap:$h_From:}}})
>
> And this results in an ldap-query with this part:
> ldap://...(|(mailBlackList=%22test%20blacklist%22%20%3ctest-blacklist%40domain.tld%3e)
>
> And this won't be found in the ldap because the actual ldap-entry is "test-blacklist@???".
>
> I also tried
> $bh_From: → %22test%20blacklist%22%20%3ctest-blacklist%40domain.tld%3e
> $rh_From: → mailBlackList=%20%22test%20blacklist%22%20%3ctest-blacklist%40domain.tld%3e%0a
>
> With quote_ldap I can't find a way to just extract "test-blacklist@???" from the "From:"-header. Without quote_ldap it works, but that is tainted.


I think I finally have it.
I have to write

(mailBlackList=${lc:${quote_ldap:${address:$h_from:}}})

Best,

Niels

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