Devuan bug report logs - #880
libnet-imap-simple-ssl-perl: IMAP SSL connection not possible

Full log

Message #5 received at submit@bugs.devuan.org (full text, mbox, reply):

Received: (at submit) by bugs.devuan.org; 18 Mar 2025 16:06:03 +0000
Return-Path: <meillo@marmaro.de>
Delivered-To: bugs@devuan.org
Received: from email.devuan.org [2a01:4f9:fff1:13::5fd9:f9e4]
	by doc.devuan.org with IMAP (fetchmail-6.4.16)
	for <debbugs@localhost> (single-drop); Tue, 18 Mar 2025 16:06:03 +0000 (UTC)
Received: from email.devuan.org
	by email.devuan.org with LMTP
	id LWwBIrOZ2WdPbQAAmSBk0A
	(envelope-from <meillo@marmaro.de>)
	for <bugs@devuan.org>; Tue, 18 Mar 2025 16:05:07 +0000
Received: by email.devuan.org (Postfix, from userid 109)
	id 7098C64A; Tue, 18 Mar 2025 16:05:07 +0000 (UTC)
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on email.devuan.org
X-Spam-Level: 
X-Spam-Status: No, score=-0.0 required=5.0 tests=SPF_PASS,T_SCC_BODY_TEXT_LINE,
	WEIRD_PORT autolearn=ham autolearn_force=no version=3.4.6
Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=91.107.236.106; helo=marmaro.de; envelope-from=meillo@marmaro.de; receiver=<UNKNOWN> 
Received: from marmaro.de (marmaro.de [91.107.236.106])
	by email.devuan.org (Postfix) with ESMTP id 4ACF51F7
	for <submit@bugs.devuan.org>; Tue, 18 Mar 2025 16:05:06 +0000 (UTC)
Received: by marmaro.de (masqmail 0.3.6-dev, from userid 1000)
	id 1tuZOo-32u-00; Tue, 18 Mar 2025 17:02:38 +0100
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
From: markus schnalke <meillo@marmaro.de>
To: Devuan Bug Tracking System <submit@bugs.devuan.org>
Subject: libnet-imap-simple-ssl-perl: IMAP SSL connection not possible
Message-ID: <174231375827.29923.16609018463711557623.reportbug@marmaro.de>
X-Mailer: reportbug 12.0.0+devuan2
Date: Tue, 18 Mar 2025 17:02:38 +0100

Package: libnet-imap-simple-ssl-perl
Version: 1.3-5
Severity: normal

Hoi.

I am unable to establish a connection with IMAP servers:

	:-F cat /tmp/imap-connect-test.pl                   
	#!/usr/bin/perl
	 
	use Net::IMAP::Simple::SSL; 
	 
	Net::IMAP::Simple::SSL->new("imap.gmx.net:993", ssl_version=>"TLSv1") 
		or die("cannot connect to server\n"); 


	:-F perl /tmp/imap-connect-test.pl                  
	cannot connect to server


However, with Openssl I can:

	:-F openssl s_client -quiet -connect imap.gmx.net:993
	depth=2 C = DE, O = T-Systems Enterprise Services GmbH, OU = T-Systems Trust Center, CN = T-TeleSec GlobalRoot Class 2
	verify return:1
	depth=1 C = DE, O = Deutsche Telekom Security GmbH, CN = Telekom Security ServerID OV Class 2 CA
	verify return:1
	depth=0 C = DE, ST = Rheinland-Pfalz, L = Montabaur, O = 1&1 Mail & Media GmbH, CN = mail.gmx.net
	verify return:1
	* OK [CAPABILITY IMAP4rev1 CHILDREN ENABLE ID IDLE LIST-EXTENDED LIST-STATUS LITERAL- MOVE NAMESPACE SASL-IR SORT SPECIAL-USE THREAD=ORDEREDSUBJECT UIDPLUS UNSELECT WITHIN AUTH=LOGIN AUTH=PLAIN] IMAP server ready H migmx112 30.1 IMAP-1MiMV4-1tIcRX2vNm-00flL5
	a logout
	* BYE Server logging out
	a OK LOGOUT completed


I have debugged the problem for days, but cannot find out what the
problem is.

The background: I have qpsmtpd with auth_imap, to authenticate users
against a Dovecot backend, all running locally.

When trying to connect to the local Dovecot server (localhost:993) I
get this message in the logfile:

	dovecot: imap-login: Disconnected: Connection closed:
	SSL_accept() failed: error:0A000076:SSL routines::no suitable signature
	algorithm (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, TLS
	handshaking: SSL_accept() failed: error:0A000076:SSL routines::no
	suitable signature algorithm,
	session=<pqzOP5cwmtMAAAAAAAAAAAAAAAAAAAAB>

Openssl, again, works as expected.

In Dovecot I have allowed all SSL versions and ciphers:

	ssl_min_protocol = ANY
	ssl_cipher_list = ALL


The problem seems to be specific to Devuan -- or to my system --
the above example code works for a friend, running it on Debian
stable, which seems to have the identical version of the package.

My system is a fresh installation of Devuan stable.


Could you please check if it is a Devuan problem.

If not: Any clues how to solve it? ;-)

Thanks.


meillo



-- System Information:
Distributor ID:	Devuan
Description:	Devuan GNU/Linux 5 (daedalus)
Release:	5
Codename:	daedalus
Architecture: x86_64

Kernel: Linux 6.1.0-31-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
LSM: AppArmor: enabled

Versions of packages libnet-imap-simple-ssl-perl depends on:
ii  libio-socket-ssl-perl    2.081-2
ii  libnet-imap-simple-perl  1.2211-1
ii  perl                     5.36.0-7+deb12u1

libnet-imap-simple-ssl-perl recommends no packages.

libnet-imap-simple-ssl-perl suggests no packages.

-- no debconf information

Send a report that this bug log contains spam.