Date: Mon, 26 Nov 2018 17:10:27 +0100 (CET) From: =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no> To: FreeBSD questions <freebsd-questions@freebsd.org> Subject: Re: Invalid DKIM signatures in this list Message-ID: <alpine.BSF.2.21.9999.1811261704230.90197@mail.fig.ol.no> In-Reply-To: <20181126125259.GB86999@admin.sibptus.ru> References: <20181126125259.GB86999@admin.sibptus.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, 26 Nov 2018 19:52+0700, Victor Sudakov wrote: > Dear Colleagues, > > I have noticed that the Mailman which manages this list keeps the sender's > "DKIM-Signature:" header intact but modifies the body of the message by adding > a footer. Are you sure? When I received your message, the hash was made up using Message-ID, Subject, To, From, Date, and In-Reply-To. I failed to find the latter field. DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sibptus.ru; s=20181118; h=Message-ID:Subject:To:From:Date:In-Reply-To; bh=lVqWu5A0dAGlwfZYAoaU7QQKfWUKOcE/0wgIPuvq06E=; b=oSl0oX15pzIzynwTUSwgm7sFrQ 9MJS9pRl3koZMQRB711V15zyprv+L4UHLfo/zD/iw211sA8weBVito1fZqHekD/VlMb78reY4xSfW UNLY9HH1RP+/pz8gORfMw7OmkB22I7i+Nxspbae5xEExcPr8YIxzhk4nqC+OdGjjQoVE=; > This behavior invalidates the sender's digital signature with > "dkim=fail (body hash mismatch; body probably modified in transit)". > I think, according to the common sense and RFC6377, the Mailman should either > remove the "DKIM-Signature:" when modifying the body, or refrain from > modifying the body, or add its own valid "DKIM-Signature:" from scratch. What > is currently happening does not make sense. > > Whom do I contact about it? > > An example of this behaviour can be seen in the message with Message-Id: > <20181126081310.026376ddcaad286971909626@sohara.org> and others. -- Trond.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?alpine.BSF.2.21.9999.1811261704230.90197>