[gentoo-server] ldap + tls issues

[gentoo-server] ldap + tls issues

[Chris Frederick]

Hi all,

I'm working on migrating a network to allow for more users and easier 
scaling.  I'm also splitting up the main server into separate tasks.  As 
long as I'm doing all this I thought it would be prudent to add an LDAP 
server for authentication/email/etc...  I'm running gentoo-hardened on 
the ldap server and I have been following the gentoo ldap guides here:

http://www.gentoo.org/doc/en/ldap-howto.xml
http://gentoo-wiki.com/HOWTO_LDAPv3

This got me a decent setup, and everything works good, but now I'm 
trying to secure it using TLS and I can't seem to get it working.  I've 
followed both guides, searched google, and still come up with nothing. 
I've verified the CN is correct, I've copied the cert from the server to 
the test client, and I've verified that the certs are ok using openssl.

running 'ldapsearch -H ldap://valid-cn -D "cn=Manager,dc=secret,dc=com" 
-W' lists everything that I've imported, but adding the -Z to the 
command exits with this:

ldap_start_tls: Connect error (-11)
         additional info: error:14090086:SSL 
routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

I'm using the same common name for the ldap:// protocol as was entered 
in the cert.  Here's the relevant config sections:

/etc/openldap/slapd.conf (server only)
TLSCipherSuite HIGH:MEDIUM:+SSLv2
TLSCertificateFile /etc/ssl/ldap.pem
TLSCertificateKeyFile /etc/openldap/ldap-key.pem
TLS_REQCERT     allow

/etc/openldap/ldap.conf (client and server)
TLS_CERT     /etc/ssl/ldap.pem
TLS_KEY      /etc/openldap/ldap-key.pem
TLS_REQUEST     never

Is there anything else I should check with the certs?

Also, I've been looking for a decent guide to help with installation and 
maintenance for LDAP and I'm coming up dead.  I've even checked the 
libraries and bookstores, and apart from a 2-8 page reference in a few 
general administrative books, I've found nothing.  Can anyone recommend 
a good book/site on how to maintain/administer/install LDAP?  I've spent 
over a week on this and it's still not operational and I'm starting to 
pull my hair out.

Thanks in advance for any help,
Chris
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Re: [gentoo-server] ldap + tls issues

[pkoelle]

Chris Frederick schrieb:
> Hi all,
> 
> I'm working on migrating a network to allow for more users and easier 
> scaling.  I'm also splitting up the main server into separate tasks.  As 
> long as I'm doing all this I thought it would be prudent to add an LDAP 
> server for authentication/email/etc...  I'm running gentoo-hardened on 
> the ldap server and I have been following the gentoo ldap guides here:
> 
> http://www.gentoo.org/doc/en/ldap-howto.xml
> http://gentoo-wiki.com/HOWTO_LDAPv3
> 
> This got me a decent setup, and everything works good, but now I'm 
> trying to secure it using TLS and I can't seem to get it working.  I've 
> followed both guides, searched google, and still come up with nothing. 
> I've verified the CN is correct, I've copied the cert from the server to 
> the test client, and I've verified that the certs are ok using openssl.
> 
> running 'ldapsearch -H ldap://valid-cn -D "cn=Manager,dc=secret,dc=com" 
> -W' lists everything that I've imported, but adding the -Z to the 
> command exits with this:
> 
> ldap_start_tls: Connect error (-11)
>         additional info: error:14090086:SSL 
> routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
Turn up debugging, there should be a more specific error somewhere like 
"unknown CA" or "self signed cert" (slapd doesn't like self signed certs").

> 
> I'm using the same common name for the ldap:// protocol as was entered 
> in the cert.  Here's the relevant config sections:
> 
> /etc/openldap/slapd.conf (server only)
> TLSCipherSuite HIGH:MEDIUM:+SSLv2
> TLSCertificateFile /etc/ssl/ldap.pem
> TLSCertificateKeyFile /etc/openldap/ldap-key.pem
> TLS_REQCERT     allow
I don't see TLSCACertificateFile pointing to your CA.


> Also, I've been looking for a decent guide to help with installation and 
> maintenance for LDAP and I'm coming up dead.  I've even checked the 
> libraries and bookstores, and apart from a 2-8 page reference in a few 
> general administrative books, I've found nothing.  Can anyone recommend 
> a good book/site on how to maintain/administer/install LDAP?
Not really. Remember, LDAP is just a protocol and management of 
implementations differ. Personally I haven't found much 10.000 feet kind 
of docs which makes thinks hard as you'll see the big picture way too 
late (after lots of painful errors due to misconceptions). Once you know 
Ldap+Sasl+ssl+kerberos and how all this might (not) work together it's 
just reading Changelogs and manpages to keep you up to date with your 
implementation.

   I've spent
> over a week on this and it's still not operational and I'm starting to 
> pull my hair out.
You're welcome ;)

cheers
  Paul
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