Preexisting Certifcate Installation for Zimbra 6.0: Difference between revisions
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cp /root/certs/commercial.key /opt/zimbra/ssl/zimbra | cp /root/certs/commercial.key /opt/zimbra/ssl/zimbra | ||
cp /root/certs/commercial.crt /opt/zimbra/ssl/zimbra | cp /root/certs/commercial.crt /opt/zimbra/ssl/zimbra | ||
cp /root/certs/commercial_ca.crt | cp /root/certs/commercial_ca.crt /opt/zimbra/ssl/zimbra/commercial | ||
Then you use Zimbra's fancy certificate importer tools. First we check if we really have a matching pair of .key and .crt files: | Then you use Zimbra's fancy certificate importer tools. First we check if we really have a matching pair of .key and .crt files: | ||
/opt/zimbra/bin/zmcertmgr verifycrt comm /opt/zimbra/ssl/zimbra/commercial.key commercial.crt commercial_ca.crt | /opt/zimbra/bin/zmcertmgr verifycrt comm /opt/zimbra/ssl/zimbra/commercial/commercial.key /opt/zimbra/ssl/zimbra/commercial.crt /opt/zimbra/ssl/zimbra/commercial_ca.crt | ||
If you see something like | If you see something like | ||
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everything is O.K. Now we need to deploy the cert: | everything is O.K. Now we need to deploy the cert: | ||
/opt/zimbra/bin/zmcertmgr deploycrt comm commercial.crt commercial_ca.crt | /opt/zimbra/bin/zmcertmgr deploycrt comm /opt/zimbra/ssl/zimbra/commercial.crt /opt/zimbra/ssl/zimbra/commercial_ca.crt | ||
The response should be something like | The response should be something like | ||
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Do you still want to add it? [no]: yes | Do you still want to add it? [no]: yes | ||
Certificate was added to keystore | Certificate was added to keystore | ||
Last but not least restart Zimbra: | Last but not least restart Zimbra: |
Revision as of 20:09, 19 April 2011
Article Information |
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This article applies to the following ZCS versions. |
Zimbra makes it extremely easy to install either a self-signed certificate or a commercial certificate specific to the Zimbra server. If, on the other hand, you want to install a certificate you created somewhere else (such as a wildcard certificate for your domain) the procedure is a bit more involved.
First thing is to make sure that the file commercial_ca.crt contains all necessary CA Certs for a valid CA chain. With a COMODO Multi Domain Certificate you receive two CA certs: AddTrustExternalCARoot.crt and UTNAddTrustServerCA.crt This may apply to other commercial CAs too. Now we put the Certs in the appropriate file
cat AddTrustExternalCARoot.crt >> ca_bundle.crt cat UTNAddTrustServerCA.crt >> ca_bundle.crt
Become root, make a directory to work in and bring the files over. There are lots of ways to do this; I used scp:
mkdir /root/certs cd /root/certs scp user@otherserver.domain.com:domain.com.crt . scp user@otherserver.domain.com:domain.com.key . scp user@otherserver.domain.com:ca_bundle.crt .
Now you need to rename the files to what Zimbra expects:
mv /root/certs/domain.com.crt /root/certs/commercial.crt mv /root/certs/domain.com.key /root/certs/commercial.key mv /root/certs/ca_bundle.crt /root/certs/commercial_ca.crt
Next you put the key file in two places where Zimbra expects it:
cp /root/certs/commercial.key /opt/zimbra/ssl/zimbra cp /root/certs/commercial.crt /opt/zimbra/ssl/zimbra cp /root/certs/commercial_ca.crt /opt/zimbra/ssl/zimbra/commercial
Then you use Zimbra's fancy certificate importer tools. First we check if we really have a matching pair of .key and .crt files:
/opt/zimbra/bin/zmcertmgr verifycrt comm /opt/zimbra/ssl/zimbra/commercial/commercial.key /opt/zimbra/ssl/zimbra/commercial.crt /opt/zimbra/ssl/zimbra/commercial_ca.crt
If you see something like
** Verifying commercial.crt against /opt/zimbra/ssl/zimbra/commercial.key Certificate (commercial.crt) and private key (/opt/zimbra/ssl/zimbra/commercial.key) match. Valid Certificate: commercial.crt: OK
everything is O.K. Now we need to deploy the cert:
/opt/zimbra/bin/zmcertmgr deploycrt comm /opt/zimbra/ssl/zimbra/commercial.crt /opt/zimbra/ssl/zimbra/commercial_ca.crt
The response should be something like
** Verifying commercial.crt against /opt/zimbra/ssl/zimbra/commercial/commercial.key Certificate (commercial.crt) and private key (/opt/zimbra/ssl/zimbra/commercial/commercial.key) match. Valid Certificate: commercial.crt: OK ** Copying commercial.crt to /opt/zimbra/ssl/zimbra/commercial/commercial.crt ** Appending ca chain commercial_ca.crt to /opt/zimbra/ssl/zimbra/commercial/commercial.crt ** Importing certificate /opt/zimbra/ssl/zimbra/commercial/commercial_ca.crt to CACERTS as zcs-user-commercial_ca...done. ** NOTE: mailboxd must be restarted in order to use the imported certificate. ** Saving server config key zimbraSSLCertificate...done. ** Saving server config key zimbraSSLPrivateKey...done. ** 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.
Finally we need the new cert to be deployed on jetty. Note that the last command spans two lines... either use the backslash as indicated, or paste both lines into one command, leaving the backslash out. Also, the password really is "changeit" ... don't be like me and screw around forever trying to figure out what to change it to.
If your certificate chain consists of one or more intermediary certificate authorities, you must perform the following with each intermediary CA certificate. Be sure to use a different alias for each CA cert in your chain.
/opt/zimbra/java/bin/keytool -import -alias root -keystore \ /opt/zimbra/java/jre/lib/security/cacerts -storepass changeit -file /opt/zimbra/conf/ca/commercial_ca.pem
In most cases (if you redeploy a cert with the same .csr for a new time period) you will get:
Certificate already exists in keystore under alias <zcs-user-commercial_ca> Do you still want to add it? [no]: yes Certificate was added to keystore
Last but not least restart Zimbra:
/etc/init.d/zimbra restart
Now we're done. To check if everything is working like expected you can verify the new cert in the Zimbra Admin GUI.
Automated Shell Script
Below is a script I used to do this on ZCS 7.0.0 NE. My cert is stored on a wiki. This script will download it and install it to Zimbra.
#!/bin/bash ################################################################################ # install-ssl-certs.sh - Thu Feb 17 08:00:42 PST 2011 - dlbewley #------------------------------------------------------------------------------- # Download wildcard cert from Wiki and install them in Zimbra. # # Also See: # o http://wiki.zimbra.com/wiki/Preexisting_Certifcate_Installation_for_Zimbra_6.0 ################################################################################ # wiki ssl cert page BASE_URL='http://wiki/download/attachments/44290464' CURL='curl --silent --fail --output' if [ ! -d '/opt/zimbra/ssl/zimbra' ]; then echo "Please Run me on the Zimbra server." exit 1 fi if [ "`whoami`" != "root" ]; then echo "Please run me as the user 'root'." exit 1 fi scratch=`mktemp -d ssl.XXXXXX` echo "Temp output going to $scratch/" # get certs echo "$0: Downloading cert." $CURL $scratch/commercial_ca.crt $BASE_URL/gd_bundle.crt if [ $? -ne 0 ]; then echo "404! Did a wiki path change?"; exit 1; fi $CURL $scratch/commercial.key $BASE_URL/wildcard.domain.key if [ $? -ne 0 ]; then echo "404! Did a wiki path change?"; exit 1; fi $CURL $scratch/commercial.crt $BASE_URL/wildcard.domain.com.crt if [ $? -ne 0 ]; then echo "404! Did a wiki path change?"; exit 1; fi # stage certs cp -p $scratch/commercial.key /opt/zimbra/ssl/zimbra cp -p $scratch/commercial_ca.crt /opt/zimbra/conf/ca/commercial_ca.pem mv $scratch/commercial.key /opt/zimbra/ssl/zimbra/commercial # install certs echo "$0: Verifying cert." /opt/zimbra/bin/zmcertmgr verifycrt comm \ /opt/zimbra/ssl/zimbra/commercial.key $scratch/commercial.crt $scratch/commercial_ca.crt if [ $? -ne 0 ]; then echo "Certificate and key do not match."; exit 1; fi echo "$0: Deploying cert." /opt/zimbra/bin/zmcertmgr deploycrt comm \ $scratch/commercial.crt $scratch/commercial_ca.crt if [ $? -ne 0 ]; then echo "Failed to deploy."; exit 1; fi echo "$0: Adding cert to cacerts.." /opt/zimbra/java/bin/keytool -import -alias root -keystore \ /opt/zimbra/java/jre/lib/security/cacerts -storepass changeit \ -file /opt/zimbra/conf/ca/commercial_ca.pem if [ $? -ne 0 ]; then echo "Failed to install in jetty."; exit 1; fi rm -rf $scratch
It is a good idea to deploy the certificate from a directory outside /opt/zimbra/ssl/zimbra/commercial/. It is not necessary to copy all files to that directory, the only file that you need to copy is the private key (commercial.key). You should do the verifycrt and the deploycrt from the /root/certs.
There is no need to manually add the chain to the cacerts java keystore. You can simply execute this command as ROOT and restart the mailbox service. /opt/zimbra/bin/zmcertmgr addcacert /opt/zimbra/ssl/zimbra/commercial/commercial.crt su - zimbra zmmailboxdctl restart
Please check the CA Provider web site to get the correct ca-bundle for the certificate you purchased. i.e. has "Essential CA" at this url https://support.comodo.com/index.php?_m=downloads&_a=downloadfile&downloaditemid=66