Installing a Gandi Commercial Certificate on ZCS

Everything as root ...

• First copy all your gandi certificates, for instance in /tmp/gandi

Gandi is not a top level Certifying Authority, so we need some extra certificates

       aptitude install ca-certificates

• Create a bundle with user trust CA file and the Gandi CA file

       cd /tmp/gandi
       cat /etc/ssl/certs/UTN_USERFirst_Hardware_Root_CA.pem GandiStandardSSLCA.pem > GandiBundle.pem

• Backup the SSL commercial directory, then erase it

       cd /opt/zimbra/ssl/zimbra/commercial/
       tar -czvf /tmp/ssl.commercial.tar.gz *
       rm  *

• Copy the required files in the directory /opt/zimbra/ssl/zimbra/commercial/

        #commercial.csr ( the certificate signing request that you sent to gandi ) 
        cp /tmp/gandi/star-gandi.openforce.com.csr commercial.csr

        # commercial.key ( your private key )
        cp /tmp/gandi/star-gandi.openforce.com.key commercial.key

        # commercial_ca.crt( bundle created above ) 
        cp /tmp/gandi/GandiBundle.pem commercial_ca.crt

        # Verify our Gandi Certificate against the private key
        /opt/zimbra/bin/zmcertmgr verifycrt comm commercial.key /tmp/gandi/star-gandi.openforce.com.crt 

        ** Verifying /tmp/gandi/star-gandi.openforce.com.crt against commercial.key
        Certificate (/tmp/gandi/star-gandi.openforce.com.crt) and private key (commercial.key) match.
        Valid Certificate: /tmp/gandi/star-gandi.openforce.com.crt: OK

        # Verify our Gandi Certificate against the Certificate Authority Chain
        /opt/zimbra/bin/zmcertmgr verifycrtchain commercial_ca.crt /tmp/gandi/star-gandi.openforce.com.crt 
        Valid Certificate Chain: /tmp/gandi/star-gandi.openforce.com.crt: OK

        # Deploy our Gandi Certificate
        /opt/zimbra/bin/zmcertmgr deploycrt comm /tmp/gandi/star-gandi.openforce.com.crt commercial_ca.crt 
        ** Verifying /tmp/gandi/star-gandi.openforce.com.crt against /opt/zimbra/ssl/zimbra/commercial/commercial.key
        Certificate (/tmp/gandi/star-gandi.openforce.com.crt) and private key (/opt/zimbra/ssl/zimbra/commercial/commercial.key) match.
        Valid Certificate: /tmp/gandi/star-gandi.openforce.com.crt: OK
        ** Copying /tmp/gandi/star-gandi.openforce.com.crt to /opt/zimbra/ssl/zimbra/commercial/commercial.crt
        ** Appending ca chain commercial_ca.crt to /opt/zimbra/ssl/zimbra/commercial/commercial.crt
        cp: `commercial_ca.crt' and `/opt/zimbra/ssl/zimbra/commercial/commercial_ca.crt' are the same file
        ** Saving server config key zimbraSSLCertificate...failed.
        ** Saving server config key zimbraSSLPrivateKey...failed.
        ** Installing mta certificate and key...done.
        ** Installing slapd certificate and key...done.
        ** Installing proxy certificate and key...done.
        ** Creating pkcs12 file /opt/zimbra/ssl/zimbra/jetty.pkcs12...done.
        ** Creating keystore file /opt/zimbra/mailboxd/etc/keystore...done.
        ** Installing CA to /opt/zimbra/conf/ca...done.

• Restart the zimbra and have a look at the log:

        /etc/init.d/zimbra restart ;  tail -f /opt/zimbra/log/*.log

• ON ZIMBRA 6 IF YOU GET THE FOLLOWING ERROR:

cause: javax.net.ssl.SSLHandshakeException sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

• Install Gandi SSL CA in the java keystore ( according to http://www.zimbrafr.org/forum/viewtopic.php?id=2017. Thanks Yvon ! )

        /opt/zimbra/java/bin/keytool -alias GandiStandardSSLCA -importcert -trustcacerts -keystore /opt/zimbra/java/jre/lib/security/cacerts -storepass changeit -file /tmp/gandi/GandiStandardSSLCA.pem