Enable onboard key management in ONTAP 9.6 and later

Contributors

You can use the Onboard Key Manager to authenticate cluster nodes to a FIPS drive or SED. The Onboard Key Manager is a built-in tool that serves authentication keys to nodes from the same storage system as your data. The Onboard Key Manager is FIPS-140-2 level 1 compliant.

You can use the Onboard Key Manager to secure the keys that the cluster uses to access encrypted data. You must enable Onboard Key Manager on each cluster that accesses an encrypted volume or a self-encrypting disk.

What you’ll need
  • If you are using NSE with an external key management (KMIP) server, you must have deleted the external key manager database.

  • You must be a cluster administrator to perform this task.

  • You must configure the MetroCluster environment before the Onboard key manager is configured.

About this task

You must run the security key-manager onboard enable command each time you add a node to the cluster. In MetroCluster configurations, you must run security key-manager onboard enable on the local cluster first, then run security key-manager onboard sync on the remote cluster, using the same passphrase on each.

By default, you are not required to enter the key manager passphrase when a node is rebooted. Except in MetroCluster, you can use the cc-mode-enabled=yes option to require that users enter the passphrase after a reboot.

Note

When the Onboard Key Manager is enabled in Common Criteria mode (cc-mode-enabled=yes), system behavior is changed in the following ways:

  • The system monitors for consecutive failed cluster passphrase attempts when operating in Common Criteria mode.

    If NetApp Storage Encryption (NSE) is enabled and you fail to enter the correct cluster passphrase at boot, the system cannot authenticate to its drives and automatically reboots. To correct this, you must enter the correct cluster passphrase at the boot prompt. Once booted, the system allows up to 5 consecutive attempts to correctly enter the cluster passphrase in a 24-hour period for any command that requires the cluster passphrase as a parameter. If the limit is reached (for example, you have failed to correctly enter the cluster passphrase 5 times in a row) then you must either wait for the 24-hour timeout period to elapse, or you must reboot the node, in order to reset the limit.

  • System image updates use the NetApp RSA-3072 code signing certificate together with SHA-384 code signed digests to check the image integrity instead of the usual NetApp RSA-2048 code signing certificate and SHA-256 code signed digests.

    The upgrade command verifies that the image contents have not been altered or corrupted by checking various digital signatures. The image update process proceeds to the next step if validation succeeds; otherwise, the image update fails. See the “cluster image” man page for information concerning system updates.

Note

The Onboard Key Manager stores keys in volatile memory. Volatile memory contents are cleared when the system is rebooted or halted. Under normal operating conditions, volatile memory contents will be cleared within 30s when a system is halted.

Steps
  1. Start the key manager setup command:

    security key-manager onboard enable -cc-mode-enabled yes|no

    Note

    Set cc-mode-enabled=yes to require that users enter the key manager passphrase after a reboot. The - cc-mode-enabled option is not supported in MetroCluster configurations. The security key-manager onboard enable command replaces the security key-manager setup command.

    The following example starts the key manager setup command on cluster1 without requiring that the passphrase be entered after every reboot:

    cluster1::> security key-manager onboard enable
    
    Enter the cluster-wide passphrase for onboard key management in Vserver "cluster1"::    <32..256 ASCII characters long text>
    Reenter the cluster-wide passphrase:    <32..256 ASCII characters long text>
  2. At the passphrase prompt, enter a passphrase between 32 and 256 characters, or for “cc-mode”, a passphrase between 64 and 256 characters.

    Note

    If the specified “cc-mode” passphrase is less than 64 characters, there is a five-second delay before the key manager setup operation displays the passphrase prompt again.

  3. At the passphrase confirmation prompt, reenter the passphrase.

  4. Verify that the authentication keys have been created:

    security key-manager key query -node node

    Note

    The security key-manager key query command replaces the security key-manager query key command. For complete command syntax, see the man page.

    The following example verifies that authentication keys have been created for cluster1:

    cluster1::> security key-manager key query
           Vserver: cluster1
       Key Manager: onboard
              Node: node1
    
    Key Tag                               Key Type  Restored
    ------------------------------------  --------  --------
    node1                                 NSE-AK    yes
        Key ID: 000000000000000002000000000001000c11b3863f78c2273343d7ec5a67762e0000000000000000
    node1                                 NSE-AK    yes
        Key ID: 000000000000000002000000000001006f4e2513353a674305872a4c9f3bf7970000000000000000
    
           Vserver: cluster1
       Key Manager: onboard
              Node: node2
    
    Key Tag                               Key Type  Restored
    ------------------------------------  --------  --------
    node1                                 NSE-AK    yes
        Key ID: 000000000000000002000000000001000c11b3863f78c2273343d7ec5a67762e0000000000000000
    node2                                 NSE-AK    yes
        Key ID: 000000000000000002000000000001006f4e2513353a674305872a4c9f3bf7970000000000000000
After you finish

Copy the passphrase to a secure location outside the storage system for future use.

All key management information is automatically backed up to the replicated database (RDB) for the cluster. You should also back up the information manually for use in case of a disaster.