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27.3. Configuring PKINIT in IdM

If your IdM servers are running with PKINIT disabled, use these steps to enable it. For example, a server is running with PKINIT disabled if you passed the --no-pkinit option with the ipa-server-install or ipa-replica-install utilities.

Prerequisites

Procedure

  1. Check if PKINIT is enabled on the server: 
    # kinit admin
Password for admin@IPA.TEST:
# ipa pkinit-status --server=server.idm.example.com
----------------
1 server matched
----------------
Server name: server.idm.example.com
PKINIT status: enabled
----------------------------
Number of entries returned 1
----------------------------
    If PKINIT is disabled, you will see the following output: 
    # ipa pkinit-status --server server.idm.example.com
-----------------
0 servers matched
-----------------
----------------------------
Number of entries returned 0
----------------------------
    You can also use the command to find all the servers where PKINIT is enabled if you omit the --server <server_fqdn> parameter.
  2. If you are using IdM without CA:
    1. On the IdM server, install the CA certificate that signed the Kerberos key distribution center (KDC) certificate: 
      # ipa-cacert-manage install -t CT,C,C ca.pem
    2. To update all IPA hosts, repeat the ipa-certupdate command on all replicas and clients: 
      # ipa-certupdate
    3. Check if the CA certificate has already been added using the ipa-cacert-manage list command. For example: 
      # ipa-cacert-manage list
CN=CA,O=Example Organization
The ipa-cacert-manage command was successful
    4. Use the ipa-server-certinstall utility to install an external KDC certificate. The KDC certificate must meet the following conditions:
      • It is issued with the common name CN=fully_qualified_domain_name,certificate_subject_base.
      • It includes the Kerberos principal krbtgt/REALM_NAME@REALM_NAME.
      • It contains the Object Identifier (OID) for KDC authentication: 1.3.6.1.5.2.3.5. 
      # ipa-server-certinstall --kdc kdc.pem kdc.key
# systemctl restart krb5kdc.service
    5. See your PKINIT status: 
      # ipa pkinit-status
  Server name: server1.example.com
  PKINIT status: enabled
  [...output truncated...]
  Server name: server2.example.com
  PKINIT status: disabled
  [...output truncated...]
  3. If you are using IdM with a CA certificate, enable PKINIT as follows: 
    # ipa-pkinit-manage enable
  Configuring Kerberos KDC (krb5kdc)
  [1/1]: installing X509 Certificate for PKINIT
  Done configuring Kerberos KDC (krb5kdc).
  The ipa-pkinit-manage command was successful
    If you are using an IdM CA, the command requests a PKINIT KDC certificate from the CA.

Additional Resources

  • For more information, see ipa-server-certinstall(1) man page.