gcp_compute_enable_oslogin_project_v1.yaml

# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
apiVersion: templates.gatekeeper.sh/v1alpha1
kind: ConstraintTemplate
metadata:
  name: gcp-compute-enable-oslogin-project-v1
spec:
  crd:
    spec:
      names:
        kind: GCPComputeRequireOSLoginConstraintV1
      validation:
        openAPIV3Schema:
          properties: {}

  targets:
   validation.gcp.forsetisecurity.org:
      rego: | #INLINE("validator/compute_enable_oslogin_project.rego")
            #
            # Copyright 2021 Google LLC
            #
            # Licensed under the Apache License, Version 2.0 (the "License");
            # you may not use this file except in compliance with the License.
            # You may obtain a copy of the License at
            #
            #      http://www.apache.org/licenses/LICENSE-2.0
            #
            # Unless required by applicable law or agreed to in writing, software
            # distributed under the License is distributed on an "AS IS" BASIS,
            # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
            # See the License for the specific language governing permissions and
            # limitations under the License.
            #
            
            package templates.gcp.GCPComputeRequireOSLoginConstraintV1
            
            import data.validator.gcp.lib as lib
            
            deny[{
            	"msg": message,
            	"details": metadata,
            }] {
            	constraint := input.constraint
            	lib.get_constraint_params(constraint, params)
            	asset := input.asset
            	asset.asset_type == "compute.googleapis.com/Instance"
            	instance := asset.resource.data
            	meta := lib.get_default(instance, "metadata", {"items": []})
            	key = "enable-oslogin"
            
            	# check if key is available and values are as expected
            	not metadata_enable_oslogin(meta)
            
            	message := sprintf("On this resource %v Ensure that required key '%v' is present and value is true.", [asset.name, key])
            	metadata := {"resource": asset.name, "key_in_violation": key}
            }
            
            # check for enable_oslogin under metadata items - no violation
            metadata_enable_oslogin(meta) {
            	metadatum := meta.items[_]
            	metadatum.key == "enable-oslogin"
            	metadatum.value == "true"
            }
            #ENDINLINE