dovecot imap ssl certificate issues
- by mulllhausen
i have been trying to configure my dovecot imap server (version 1.0.10 - upgrading is not an option at this stage) with a new ssl certificate on ubuntu like so:
$ grep ^ssl /etc/dovecot/dovecot.conf
ssl_disable = no
ssl_cert_file = /etc/ssl/certs/mydomain.com.crt.20120904
ssl_key_file = /etc/ssl/private/mydomain.com.key.20120904
$ /etc/init.t/dovecot stop
$ sudo dovecot -p
$ [i enter the ssl password here]
it doesn't show any errors and when i run ps aux | grep dovecot i get
root 21368 0.0 0.0 12452 688 ? Ss 15:19 0:00 dovecot -p
root 21369 0.0 0.0 71772 2940 ? S 15:19 0:00 dovecot-auth
dovecot 21370 0.0 0.0 14140 1904 ? S 15:19 0:00 pop3-login
dovecot 21371 0.0 0.0 14140 1900 ? S 15:19 0:00 pop3-login
dovecot 21372 0.0 0.0 14140 1904 ? S 15:19 0:00 pop3-login
dovecot 21381 0.0 0.0 14280 2140 ? S 15:19 0:00 imap-login
dovecot 21497 0.0 0.0 14280 2116 ? S 15:29 0:00 imap-login
dovecot 21791 0.0 0.0 14148 1908 ? S 15:48 0:00 imap-login
dovecot 21835 0.0 0.0 14148 1908 ? S 15:53 0:00 imap-login
dovecot 21931 0.0 0.0 14148 1904 ? S 16:00 0:00 imap-login
me 21953 0.0 0.0 5168 944 pts/0 S+ 16:02 0:00 grep --color=auto dovecot
which looks like it is all running fine. so then i test to see if i can telnet to the dovecot server, and this works fine:
$ telnet localhost 143
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK Dovecot ready.
but when i test whether dovecot has configured the ssl certificates properly, it appears to fail:
$ sudo openssl s_client -connect localhost:143 -starttls imap
CONNECTED(00000003)
depth=0 /description=xxxxxxxxxxxxxxxxx/C=AU/ST=xxxxxxxx/L=xxxx/O=xxxxxx/CN=*.mydomain.com/[email protected]
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 /description=xxxxxxxxxxx/C=AU/ST=xxxxxx/L=xxxx/O=xxxx/CN=*.mydomain.com/[email protected]
verify error:num=27:certificate not trusted
verify return:1
depth=0 /description=xxxxxxxx/C=AU/ST=xxxxxxxxxx/L=xxxx/O=xxxxx/CN=*.mydomain.com/[email protected]
verify error:num=21:unable to verify the first certificate
verify return:1
---
Certificate chain
0 s:/description=xxxxxxxxxxxx/C=AU/ST=xxxxxxxxxx/L=xxxxxxxx/O=xxxxxxx/CN=*.mydomain.com/[email protected]
i:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Class 2 Primary Intermediate Server CA
---
Server certificate
-----BEGIN CERTIFICATE-----
xxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxx
.
.
.
xxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxx==
-----END CERTIFICATE-----
subject=/description=xxxxxxxxxx/C=AU/ST=xxxxxxxxx/L=xxxxxxx/O=xxxxxx/CN=*.mydomain.com/[email protected]
issuer=/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Class 2 Primary Intermediate Server CA
---
No client certificate CA names sent
---
SSL handshake has read 2831 bytes and written 342 bytes
---
New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Server public key is 2048 bit
Compression: NONE
Expansion: NONE
SSL-Session:
Protocol : TLSv1
Cipher : DHE-RSA-AES256-SHA
Session-ID: xxxxxxxxxxxxxxxxxxxx
Session-ID-ctx:
Master-Key: xxxxxxxxxxxxxxxxxx
Key-Arg : None
Start Time: 1351661960
Timeout : 300 (sec)
Verify return code: 21 (unable to verify the first certificate)
---
. OK Capability completed.
at least, i'm assuming this is a failure???
