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bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because t


From: Lars Magne Ingebrigtsen
Subject: bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently
Date: Wed, 16 Mar 2016 11:54:17 +0100

Anssi Saari <as@sci.fi> writes:

> And with a wild guess after visiting an ssl checker website I think I
> might need MD5 for signature checking. gnutls.el mentions
> GNUTLS_VERIFY_ALLOW_SIGN_RSA_MD5 but I don't know how to specify that
> from Gnus.

Here's an easy test case:

(open-network-stream
 "nntpd" (get-buffer-create "*foo*")
 "news.eternal-september.org" "nntp"
 :type 'starttls
 :end-of-command "^\\([2345]\\|[.]\\).*\n"
 :capability-command "HELP\r\n"
 :success "^3"
 :starttls-function
 (lambda (capabilities)
   (if (not (string-match "STARTTLS" capabilities))
       nil
     "STARTTLS\r\n")))

First of all, I think the error message is lacking.  It should say more
about what's failing.

As to the bug -- gnutls by default now refuses to deal with MD5
certificates.  We could override that, and instead let the network
security manager notify the user that the connection isn't safe.

I think that's a better solution, but others may differ.




In GNU Emacs 25.1.50.26 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.2)
 of 2016-03-12 built on stories
Repository revision: 63efcc268635dea78c6bd80749eae4ee2c72d717
Windowing system distributor 'The X.Org Foundation', version 11.0.11204000
System Description:     Debian GNU/Linux 7.9 (wheezy)

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GSETTINGS NOTIFY GNUTLS
LIBXML2 FREETYPE LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
  value of $LANG: en_US
  locale-coding-system: iso-latin-1-unix

Major mode: Group

Minor modes in effect:
  gnus-agent-group-mode: t
  shell-dirtrack-mode: t
  diff-auto-refine-mode: t
  gnus-topic-mode: t
  gnus-undo-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t

Recent messages:
Auto-saving...done
Mark set [2 times]
Sending...
Mark set [2 times]
Sending news via 
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 using nnvirtual...
Mark set
Saving file /home/larsi/Mail/archive/sent/2016w11...
Wrote /home/larsi/Mail/archive/sent/2016w11
Sending...done
Making completion list...

Load-path shadows:
/home/larsi/src/clock.el/clock hides /home/larsi/lisp/clock
/home/larsi/src/cddb.el/expect hides /home/larsi/lisp/expect
/home/larsi/src/pvr.el/pvr hides /home/larsi/lisp/pvr
~/pgnus/contrib/vcard hides /home/larsi/lisp/vcard
/home/larsi/src/cddb.el/captitle hides /home/larsi/lisp/captitle
~/lisp/zenirc-2.112/src/zenirc-example hides /home/larsi/lisp/zenirc-example
/home/larsi/lisp/dom hides /home/larsi/src/emacs/trunk/lisp/dom
~/pgnus/contrib/compface hides /home/larsi/src/emacs/trunk/lisp/image/compface

Features:
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Memory information:
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-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no






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