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Permission actions

Permission actions are used for the purpose of ACL maintenance. They cover adding or revoking access to resources as well as purging them. All of them have to be invoked within a context of authorizable so a FOR USER or FOR GROUP action needs to precede them.

Operations

Clear permissions

For the purpose of clearing permissions, the CLEAR operation exist. It is highly recommended for the scripts to be idempotent i.e. to be able to execute them with no preparation beforehand. For this purpose, the permissions on the subtree of interest should be purged at the beginning of the script execution.

FOR-USER 'john-doe' BEGIN
    CLEAR '/content'
END

If the ACL clearance should affect only selected path use flag --STRICT_PATH.

FOR-USER 'john-doe' BEGIN
    # affects only selected page
    CLEAR '/content/geometrixx' --STRICT-PATH
END

CLEAR will remove all applied permissions, including those added manually.

Add access to a resource

Adding access to a resource could be achieved using the ALLOW action. Technically speaking, ALLOW action adds a new node under rep:policy node with the rep:GrantACE nodetype. It's always added as the last one in the existing Access Control List (ACL). Due to implementation specific, if the permission exist already, the operation will not be effective.

FOR-USER 'john-doe' BEGIN
    ALLOW '/content' 'READ'
    ALLOW '/content/geometrixx' ['READ', 'MODIFY']
    ALLOW '/content/geometrixx-outdoors' ['READ']
    ALLOW '/content/folders' types=['sling:OrderedFolder'] ['READ'] # allows to read all resources with primary type 'sling:OrderedFolder'
    ALLOW '/content/folders' properties=['jcr:title'] ['READ'] # allows to read property 'jcr:title'
    ALLOW '/content/phantom' ['READ'] --IF-EXISTS # doesn't fail if path doesn't exist
END

Revoke access to a resource

The DENY action is complementary to ALLOW but rather adds a rep:DenyACE nodetype thus restricting the access to the subtree.

FOR-USER 'john-doe' BEGIN
    DENY '/content' 'READ'
    DENY '/content/geometrixx' ['READ', 'MODIFY']
    DENY '/content/geometrixx-outdoors' ['READ']
    DENY '/content/folders' types=['sling:OrderedFolder'] ['READ'] # denys to read all resources with primary type 'sling:OrderedFolder'
    DENY '/content/folders' properties=['jcr:title'] ['READ'] # denys to read property 'jcr:title'
    DENY '/content/phantom' ['READ'] --IF-EXISTS # doesn't fail if path doesn't exist
END

Glob patterns

The Access Control Entries (ACEs) can be either applied directly on the path selected or a rep:glob restriction can be used. This restriction does not take an immediate effect but rather uses a regexp pattern provided to match the target node. If the requested resource path matches the regexp and the resource is lying below the path where the regexp was configured, the actual modifier is effective.

# Will only match pages named home
ALLOW '/content/geometrixx' glob='home' ['ALL']

# Will only match jcr:titles properties
ALLOW '/content' glob='/jcr:content/jcr:title' ['ALL']

If the permission should be applied (or revoked) on the strictly selected path only, while not affecting the subtree as it is by default a glob pattern with empty regexp should be used. In order to recognize the empty pattern a STRICT keyword is used.

ALLOW '/content/geometrixx' glob='STRICT' ['ALL']

Although it may look tempting to use this feature, the best practice is to prefer the usual permission application over glob restriction. Glob restriction make the permission scheme harder to read giving also some non-minimal performance overhead while calculating the effective permissions.

On the other hand, glob patterns are inevitable whenever we'd like to apply a permission scheme on not-yet-finalized content. Regexp matching makes it possible to treat the future content additions with no permission management effort.

Read more in the OAK documentation

Available access control modifiers

APM allows to use every access modifier registered in AccessControlManager. Additionally, there are some predefined privilege groups:

Modifier JCR/AEM equivalent
READ Privilege.JCR_READ
MODIFY Privilege.JCR_MODIFY_PROPERTIES, Privilege.JCR_LOCK_MANAGEMENT, Privilege.JCR_VERSION_MANAGEMENT
MODIFY_PAGE Privilege.JCR_REMOVE_NODE, Privilege.JCR_REMOVE_CHILD_NODES, Privilege.JCR_NODE_TYPE_MANAGEMENT, Privilege.JCR_ADD_CHILD_NODES
CREATE Privilege.JCR_ADD_CHILD_NODES, Privilege.JCR_NODE_TYPE_MANAGEMENT
DELETE Privilege.JCR_REMOVE_NODE, Privilege.JCR_REMOVE_CHILD_NODES
REPLICATE "crx:replicate"
ALL Privilege.JCR_READ, Privilege.JCR_WRITE, Privilege.JCR_LOCK_MANAGEMENT, Privilege.JCR_VERSION_MANAGEMENT, Privilege.JCR_NODE_TYPE_MANAGEMENT, "crx:replicate"
READ_ACL Privilege.JCR_READ_ACCESS_CONTROL
MODIFY_ACL Privilege.JCR_MODIFY_ACCESS_CONTROL
DELETE_CHILD_NODES Privilege.JCR_REMOVE_CHILD_NODES