Charm Interface - Barbican HSM plugin
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This interface supports the integration between Barbican and HSM devices.


No explicit handler is required to consume this interface in charms that consume this interface.

The interface provides hsm.connected and hsm.available states.

For an HSM subordinate charm

The hsm.connected state indicates that the Barbican principle charms has been connected to. At this point the plugin data required for to configure the HSM from Barbican should be presented.


To consume this interface in your charm or layer, add the following to layer.yaml:

includes: ['interface:barbican-hsm']

and add a provides interface of type hsm to your charm or layers metadata.yaml:

    interface: barbican-hsm
    scope: container

Please see the example ‘Barbican SoftHSM’ charm for an example of how to author an HSM charm.


Please report bugs on Launchpad.

For development questions please refer to the OpenStack Charm Guide.