* bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently
@ 2016-03-16 10:54 Lars Magne Ingebrigtsen
2016-03-16 12:03 ` Lars Magne Ingebrigtsen
2016-04-24 14:03 ` Lars Magne Ingebrigtsen
0 siblings, 2 replies; 6+ messages in thread
From: Lars Magne Ingebrigtsen @ 2016-03-16 10:54 UTC (permalink / raw)
To: 23027
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 $LANG: en_US
locale-coding-system: iso-latin-1-unix
Major mode: Group
Minor modes in effect:
gnus-agent-group-mode: t
shell-dirtrack-mode: t
diff-auto-refine-mode: t
gnus-topic-mode: t
gnus-undo-mode: t
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
buffer-read-only: t
line-number-mode: t
Recent messages:
Auto-saving...done
Mark set [2 times]
Sending...
Mark set [2 times]
Sending news via ^$\|\(^gnu\.emacs\.announce$\)\|\(^gnu\.emacs\.bug$\)\|\(^gnu\.emacs\.help$\)\|\(^gnu\.emacs\.sources$\)\|\(^gnu\.gcc\.announce$\)\|\(^gnu\.utils\.bug$\)\|\(^gnu\.utils\.help$\)\|\(^gnu\.gnustep\.announce$\)\|\(^gnu\.gnustep\.bugs$\)\|\(^gnu\.gnustep\.discuss$\)\|\(^gnu\.gnustep\.help$\)\|\(^gnu\.emacs\.gnews$\)\|\(^gnu\.emacs\.vm\.bug$\)\|\(^gnu\.emacs\.vm\.info$\)\|\(^gnu\.emacs\.vms$\)\|\(^gnu\.gnusenet\.config$\)\|\(^comp\.emacs$\)\|\(^comp\.emacs\.xemacs$\) 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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ansi-color shr-color color mm-archive gnus-async gnus-dup qp gnus-ml
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gnus-win gnus nnheader gnus-util rmail rmail-loaddefs mail-utils movie
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mm-util mail-prsvr jka-compr cl finder-inf package epg-config
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code-pages mule custom widget hashtable-print-readable backquote inotify
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty make-network-process emacs)
Memory information:
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(symbols 48 182111 167)
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--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently
2016-03-16 10:54 bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently Lars Magne Ingebrigtsen
@ 2016-03-16 12:03 ` Lars Magne Ingebrigtsen
2016-04-24 14:03 ` Lars Magne Ingebrigtsen
1 sibling, 0 replies; 6+ messages in thread
From: Lars Magne Ingebrigtsen @ 2016-03-16 12:03 UTC (permalink / raw)
To: 23027
And furthermore, the form bugs out with the following, which should also
be fixed:
Debugger entered--Lisp error: (error "Process nntpd<4> not running")
process-send-string(#<process nntpd<4>> "HELP.\n")
network-stream-command(#<process nntpd<4>> "HELP.\n" "^\\([2345]\\|[.]\\).*\n")
network-stream-open-starttls("nntpd" #<buffer *foo*> "news.eternal-september.org" "nntp" (:type starttls :end-of-command "^\\([2345]\\|[.]\\).*\n" :capability-command "HELP.\n" :success "^3" :starttls-function (lambda (capabilities) (if (not (string-match "STARTTLS" capabilities)) nil "STARTTLS.\n"))))
open-network-stream("nntpd" #<buffer *foo*> "news.eternal-september.org" "nntp" :type starttls :end-of-command "^\\([2345]\\|[.]\\).*\n" :capability-command "HELP.\n" :success "^3" :starttls-function (lambda (capabilities) (if (not (string-match "STARTTLS" capabilities)) nil "STARTTLS.\n")))
eval((open-network-stream "nntpd" (get-buffer-create "*foo*") "news.eternal-september.org" "nntp" :type (quote starttls) :end-of-command "^\\([2345]\\|[.]\\).*\n" :capability-command "HELP.\n" :success "^3" :starttls-function (function (lambda (capabilities) (if (not (string-match "STARTTLS" capabilities)) nil "STARTTLS.\n")))) nil)
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently
2016-03-16 10:54 bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently Lars Magne Ingebrigtsen
2016-03-16 12:03 ` Lars Magne Ingebrigtsen
@ 2016-04-24 14:03 ` Lars Magne Ingebrigtsen
2016-04-24 14:14 ` Lars Magne Ingebrigtsen
2016-04-29 7:48 ` Anssi Saari
1 sibling, 2 replies; 6+ messages in thread
From: Lars Magne Ingebrigtsen @ 2016-04-24 14:03 UTC (permalink / raw)
To: 23027; +Cc: Anssi Saari
Lars Magne Ingebrigtsen <larsi@gnus.org> writes:
> 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.
I've now fixed this...
> 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.
This apparently has nothing to do with MD5? Included below is what
s_client says about the TLS connection. It's ECDSA...
Hm... but there is a self signed certificate in the chain. Uhm...
using GNUTLS_VERIFY_DISABLE_CA_SIGN doesn't help, I still get
GNUTLS_E_UNSUPPORTED_SIGNATURE_ALGORITHM. Hm...
Is it possible that the gnutls installation is just too old or
something? Weird.
[larsi@stories /usr/include/gnutls]$ openssl s_client -connect news.eternal-september.org:nntps
CONNECTED(00000003)
depth=1 O = Root CA, OU = http://www.cacert.org, CN = CA Cert Signing Authority, emailAddress = support@cacert.org
verify error:num=19:self signed certificate in certificate chain
verify return:0
---
Certificate chain
0 s:/CN=news.eternal-september.org
i:/O=Root CA/OU=http://www.cacert.org/CN=CA Cert Signing Authority/emailAddress=support@cacert.org
1 s:/O=Root CA/OU=http://www.cacert.org/CN=CA Cert Signing Authority/emailAddress=support@cacert.org
i:/O=Root CA/OU=http://www.cacert.org/CN=CA Cert Signing Authority/emailAddress=support@cacert.org
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIGLDCCBBSgAwIBAgIDEdYnMA0GCSqGSIb3DQEBDQUAMHkxEDAOBgNVBAoTB1Jv
b3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEiMCAGA1UEAxMZ
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MCEGA1UEAxMabmV3cy5ldGVybmFsLXNlcHRlbWJlci5vcmcwggIgMA0GCSqGSIb3
DQEBAQUAA4ICDQAwggIIAoIB/yjsWrb5ftbIGzSCTRyYRyH+CcwR2FkVXaK331KM
8bULtWrbOGj8Ig5iMSP1+y7GQxX5WPErSduJI2fnp//TElb0FlmqShkNesSc3os1
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CurbHkgkP56yPFj8SdXfNdP34YBXEiSI4ZEFM9CS/wsVKm8SE4TnIRDjN39i7ad1
-----END CERTIFICATE-----
subject=/CN=news.eternal-september.org
issuer=/O=Root CA/OU=http://www.cacert.org/CN=CA Cert Signing Authority/emailAddress=support@cacert.org
---
No client certificate CA names sent
---
SSL handshake has read 4358 bytes and written 416 bytes
---
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384
Server public key is 4086 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:
Protocol : TLSv1.2
Cipher : ECDHE-RSA-AES256-GCM-SHA384
Session-ID: 79FA1DD8A295D1D96475BE1818E88C3C28059A074AA8B743871B48243C203072
Session-ID-ctx:
Master-Key: 156AF5671933E472B5B2E5ACAED0FB40B6F4EE997F9F2DABA13F548E9B64DB4565C4FD9B7D9539AF0D7A77B64E3942F4
Key-Arg : None
PSK identity: None
PSK identity hint: None
SRP username: None
TLS session ticket lifetime hint: 300 (seconds)
TLS session ticket:
0000 - 65 10 86 c0 3b 81 89 d6-b6 63 74 7a c6 9d 9b 3b e...;....ctz...;
0010 - a8 38 e2 4a dc 47 96 f6-90 b5 37 6b 33 dc 73 2b .8.J.G....7k3.s+
0020 - 9c fb 97 e9 fc de 22 70-b7 da 76 0b 92 f3 94 72 ......"p..v....r
0030 - 49 c5 ac 15 9f a3 5f 1e-e9 c6 19 b1 ed 16 1d 50 I....._........P
0040 - 8a 0a 74 70 8e 97 ed 09-04 99 3d 75 cd 4d 46 15 ..tp......=u.MF.
0050 - 93 b1 31 50 e0 28 bc b3-dd da 46 2c ac 00 47 88 ..1P.(....F,..G.
0060 - a5 c3 b1 ad e1 86 d8 f3-85 c8 c3 9e c5 cf bb 9d ................
0070 - 93 14 8d c6 de c9 ff 7e-f6 45 99 35 cb 83 41 ab .......~.E.5..A.
0080 - 97 06 11 85 4a ee 76 a5-f4 1b 11 17 98 dd ec aa ....J.v.........
0090 - f2 48 d4 b6 2d 2e 16 a9-53 03 c1 96 96 31 ba ab .H..-...S....1..
Start Time: 1461506257
Timeout : 300 (sec)
Verify return code: 19 (self signed certificate in certificate chain)
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently
2016-04-24 14:03 ` Lars Magne Ingebrigtsen
@ 2016-04-24 14:14 ` Lars Magne Ingebrigtsen
2016-04-29 7:48 ` Anssi Saari
1 sibling, 0 replies; 6+ messages in thread
From: Lars Magne Ingebrigtsen @ 2016-04-24 14:14 UTC (permalink / raw)
To: 23027
[larsi@stories ~/src/emacs/trunk]$ gnutls-cli -p nntps news.eternal-september.org
Resolving 'news.eternal-september.org'...
Connecting to '213.239.209.88:563'...
*** Fatal error: The signature algorithm is not supported.
*** Handshake has failed
GnuTLS error: The signature algorithm is not supported.
That's not very helpful.
However, on a newer machine it says:
- Certificate[1] info:
- subject `O=Root CA,OU=http://www.cacert.org,CN=CA Cert Signing Authority,EMAIL=support@cacert.org', issuer `O=Root CA,OU=http://www.cacert.org,CN=CA Cert Signing Authority,EMAIL=support@cacert.org', RSA key 4096 bits, signed using RSA-MD5 (broken!), activated `2003-03-30 12:29:49 UTC', expires `2033-03-29 12:29:49 UTC', SHA-1 fingerprint `135cec36f49cb8e93b1ab270cd80884676ce8f33'
So there's the MD5.
So it like fails on several levels: On older machines, the GnuTLS
library is too old, and on newer machines, it refuses the connection
because of the MD5...
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently
2016-04-24 14:03 ` Lars Magne Ingebrigtsen
2016-04-24 14:14 ` Lars Magne Ingebrigtsen
@ 2016-04-29 7:48 ` Anssi Saari
2016-04-29 12:43 ` Lars Ingebrigtsen
1 sibling, 1 reply; 6+ messages in thread
From: Anssi Saari @ 2016-04-29 7:48 UTC (permalink / raw)
To: 23027; +Cc: Lars Magne Ingebrigtsen
Some comments on this issue (I originally reported this on
gnu.emacs.gnus). The machine in question runs Ubuntu 14.04 LTS and seems
to have two versions of GnuTLS installed, 2.6 and 2.8, 2.6 is the
default. If I force GnuTLS 2.8 then I have no issue.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently
2016-04-29 7:48 ` Anssi Saari
@ 2016-04-29 12:43 ` Lars Ingebrigtsen
0 siblings, 0 replies; 6+ messages in thread
From: Lars Ingebrigtsen @ 2016-04-29 12:43 UTC (permalink / raw)
To: Anssi Saari; +Cc: 23027-close
Anssi Saari <as@sci.fi> writes:
> Some comments on this issue (I originally reported this on
> gnu.emacs.gnus). The machine in question runs Ubuntu 14.04 LTS and
> seems to have two versions of GnuTLS installed, 2.6 and 2.8, 2.6 is
> the default. If I force GnuTLS 2.8 then I have no issue.
Yes, I upgraded this laptop to the newest Ubuntu, and the problem went
away. So I guess eternal-september uses something too new for the
previous Ubuntu version.
I'll close the bug.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2016-04-29 12:43 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2016-03-16 10:54 bug#23027: 25.1.50; Emacs refuses to talk to eternal-september because they now use an MD5 certificate, apparently Lars Magne Ingebrigtsen
2016-03-16 12:03 ` Lars Magne Ingebrigtsen
2016-04-24 14:03 ` Lars Magne Ingebrigtsen
2016-04-24 14:14 ` Lars Magne Ingebrigtsen
2016-04-29 7:48 ` Anssi Saari
2016-04-29 12:43 ` Lars Ingebrigtsen
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