From: Leah Neukirchen <leah@vuxu.org>
To: ebiederm@xmission.com (Eric W. Biederman)
Cc: Eric Wong <e@yhbt.net>, meta@public-inbox.org
Subject: Re: [PATCH] t/import: test for nasty characters
Date: Sun, 05 Jul 2020 16:55:46 +0200 [thread overview]
Message-ID: <87sge6ui31.fsf@vuxu.org> (raw)
In-Reply-To: <87a70fnhxp.fsf@x220.int.ebiederm.org> (Eric W. Biederman's message of "Sat, 04 Jul 2020 15:28:34 -0500")
ebiederm@xmission.com (Eric W. Biederman) writes:
> Eric Wong <e@yhbt.net> writes:
>
>> Eric Wong <e@yhbt.net> wrote:
>>> "Eric W. Biederman" <ebiederm@xmission.com> wrote:
>>> > - $name =~ tr/<>//d;
>>> > + $name =~ tr/\n\r<>$/ /d;
>>>
>>> Is getting rid of '$' an effort to avoid double interpolation by Perl?
>>> Perl won't recursively expand variables AFAIK.
>>
>> I'm not seeing the purpose in $ being grouped with the
>> characters (test below confirms it, I think).
>
> What I think we should be doing is any characters that are not a valid
> part of a name (as defined by the appropriate email RFCs) should be
> dealt with.
>
> I am pretty certain $ isn't of those characters that is valid in a name.
These characters are allowed as names without quoting, RFC 2822 3.2.4:
atext = ALPHA / DIGIT / ; Any character except controls,
"!" / "#" / ; SP, and specials.
"$" / "%" / ; Used for atoms
"&" / "'" /
"*" / "+" /
"-" / "/" /
"=" / "?" /
"^" / "_" /
"`" / "{" /
"|" / "}" /
"~"
In particular, "." is not included.
hth,
--
Leah Neukirchen <leah@vuxu.org> https://leahneukirchen.org/
prev parent reply other threads:[~2020-07-05 14:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-03 21:53 [PATCH] Import: Be more careful with names in email Eric W. Biederman
2020-07-03 23:30 ` Eric Wong
2020-07-04 20:25 ` [PATCH] t/import: test for nasty characters Eric Wong
2020-07-04 20:28 ` Eric W. Biederman
2020-07-04 21:24 ` Eric Wong
2020-07-05 14:55 ` Leah Neukirchen [this message]
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