[tor-bugs] #32105 [Circumvention/BridgeDB]: bridges at torproject.org don't respond

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#32105: bridges at torproject.org don't respond
------------------------------------+-----------------------------------
 Reporter:  mh828                   |          Owner:  (none)
     Type:  defect                  |         Status:  needs_information
 Priority:  Medium                  |      Milestone:
Component:  Circumvention/BridgeDB  |        Version:
 Severity:  Normal                  |     Resolution:
 Keywords:                          |  Actual Points:
Parent ID:                          |         Points:
 Reviewer:                          |        Sponsor:  Sponsor30
------------------------------------+-----------------------------------
Changes (by phw):

 * status:  new => needs_information


Comment:

 I could reproduce this issue. Here are BridgeDB's logs after I requested
 bridges from my gmail address:
 {{{
 22:44:41 DEBUG    L373:server.validateTo()      Validating SMTP 'RCPT TO:'
 email address...
 22:44:41 INFO     L613:autoresponder.reply()    Got an email; deciding
 whether to reply.
 22:44:41 DEBUG    L664:autoresponder.runCheck() Canonicalizing client
 email domain...
 22:44:41 DEBUG    L673:autoresponder.runCheck() Canonical email domain:
 gmail.com
 22:44:41 ERROR    L682:autoresponder.runCheck() SMTP/Email canonical
 domain mismatch!
 22:44:41 DEBUG    L685:autoresponder.runCheck() Canonical domain mismatch:
 polyanthum != gmail.com
 22:44:41 INFO      L60:dkim.checkDKIM()         Checking DKIM verification
 results...
 22:44:41 DEBUG     L61:dkim.checkDKIM()         Domain has rules:
 ignore_dots, dkim
 22:44:41 INFO      L72:dkim.checkDKIM()         Rejecting bad DKIM header
 on incoming email: u'dunno'
 }}}

 Here's the full email:
 {{{
 Received: from polyanthum ([[scrubbed]] helo=polyanthum)
   by polyanthum.torproject.org with BridgeDB (0.9.0+0.g681963d.dirty)
   for bridges at bridgedb; Wed, 16 Oct 2019 22:55:49 +0000
 From [scrubbed]  Wed Oct 16 22:55:49 2019
 X-Original-To: [scrubbed].org
 Delivered-To: [scrubbed].org
 Received: from eugeni.torproject.org (eugeni.torproject.org
 [IPv6:2a01:4f8:10b:239f:0:ab4:202:1])
   (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
   (Client CN "clientcerts/eugeni.torproject.org", Issuer "auto-
 ca.torproject.org" (verified OK))
   by polyanthum.torproject.org (Postfix) with ESMTPS id 46B0B1001CF
   for <[scrubbed].org>; Wed, 16 Oct 2019 22:55:49 +0000 (UTC)
 Received: from localhost (localhost [[scrubbed]])
   by eugeni.torproject.org (Postfix) with ESMTP id 24E15E198D
   for <[scrubbed].org>; Wed, 16 Oct 2019 22:55:49 +0000 (UTC)
 X-Virus-Scanned: Debian amavisd-new at
 Received: from eugeni.torproject.org ([[scrubbed]])
   by localhost (eugeni.torproject.org [[scrubbed]]) (amavisd-new, port
 10024)
   with ESMTP id QajNQiO4VjCc for <[scrubbed].org>;
   Wed, 16 Oct 2019 22:55:49 +0000 (UTC)
 Received: from mail-vs1-xe36.google.com (mail-vs1-xe36.google.com
 [IPv[scrubbed]])
   (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
   (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (not verified))
   by eugeni.torproject.org (Postfix) with ESMTPS id D10D6E198C
   for <[scrubbed]>; Wed, 16 Oct 2019 22:55:48 +0000 (UTC)
 Received: by mail-vs1-xe36.google.com with SMTP id d3so302626vsr.1
         for <[scrubbed]>; Wed, 16 Oct 2019 15:55:48 -0700 (PDT)
 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
         d=gmail.com; s=20161025;
         h=mime-version:from:date:message-id:subject:to;
         bh=ngRdnins9CRptXBut2wpGkSCNfH0hUIw7lj/EkgMSE0=;
 b=clpdZk8NzD3i9cKiuDgzqJSSmCS0hdf0LTyXfSB0+8c5595EdbGEInR9CuZ+MOjzKC
 nWQQeZgTt4ZLcIrA1BqKYxMfZc5eRFkyKmyh3Pq8T5aHf2n+NsyAlaX94RSg7YS+B5Rh
 6TSXG6DmVZPtarYZriOHEfyXovkdHX9Pr56/wOBOepjNsy0Z1H1PwKMLyIKcCZi4aWRf
 K40IZpSr2iHmcM4AUtPQyj85tRk12hbP5hvfYoNmR7j5lBUhXqKcpGofxOQtPusgUqM3
 6hZJkFdsLPtizjOWQLWvBwQWdtlDhQOveovsHReZAVL6p8BLPbuJ9wdeuAVQO9Ws4Fey
          CEwQ==
 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
         d=1e100.net; s=20161025;
         h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
         bh=ngRdnins9CRptXBut2wpGkSCNfH0hUIw7lj/EkgMSE0=;
 b=la81DfjtXqYcs7zHkDTgdvcTPyJ8hFkLTYU1E6wKpzH8CXdI30YNIvVJ1979loi/20
 eYq7bLjp2A2+SdJOio+gYLz0bXr/sFyuOx09uP5/oXuh2Dvj2DAaxejaSpTBOcxvKZn+
 ud77fUBBEKE9256gSFeQm0YMz099mjIpSJLwycCG7iHEJXnn2Px/e3lqrIbt9ce+NjNi
 L8zyp5qcd2VJFVM5lk940kWNqthsh164ZmVDXDN6QyMPXpi8VkqXw0CgHLL6SBUsAmhU
 6AivgW7x+zGWJN5MJFtt4mJz/3SgcNGUUmdfGau8ksbRG6y6ETYASc+96MSIaNhNoYb3
          x82g==
 X-Gm-Message-State:
 APjAAAWO0amLn5psJwvrlW5Go4jx0NXEhKEOCn2G3ICYtzL2HaCGIzVQ
   G0ldr7O2yR/3fvwcnUYoBdJDDzEbLI2Uvw9ioZlC
 X-Google-Smtp-Source:
 APXvYqzSyJE2SxcmnFJOhPjk/JFjPTf+MJHfpcT/ueP1Jv0/4J67w2iaW9lL+77mWdlZRb+VkhWEK7qw24343s2E2Pk=
 X-Received: by [scrubbed] with SMTP id y13mr170018vso.96.1571266545303;
  Wed, 16 Oct 2019 15:55:45 -0700 (PDT)
 MIME-Version: 1.0
 From: Philipp Winter <[scrubbed]>
 Date: Wed, 16 Oct 2019 15:55:34 -0700
 Message-ID: <CAF09V-5OYyPxE83Q1SYkBxA=[scrubbed].com>
 Subject:
 To: [scrubbed]
 Content-Type: text/plain; charset="UTF-8"
 X-DKIM-Authentication-Results: dunno

 get transport obfs4
 }}}

 The header `X-DKIM-Authentication-Results: dunno` seems to be the issue
 here. A tool called dkimproxy is supposed to add this header. But where is
 it? It doesn't seem to be running or installed on polyanthum.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32105#comment:6>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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