gcp_enforce_naming_v1.yaml

# Copyright 2019 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-enforce-naming-v1
spec:
  crd:
    spec:
      names:
        kind: GCPEnforceNamingConstraintV1
      validation:
        openAPIV3Schema:
          properties:
            naming_rules:
              type: array
              items:
                type: object
                properties:
                  resource:
                    type: string
                  patterns:
                    type: array
                    items:
                      type: string
  targets:
   validation.gcp.forsetisecurity.org:
      rego: | #INLINE("validator/gcp_enforce_naming.rego")
           #
           # Copyright 2019 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.GCPEnforceNamingConstraintV1
           
           import data.validator.gcp.lib as lib
           
           ###########################
           # Find allowlist Violations
           ###########################
           deny[{
           	"msg": message,
           	"details": metadata,
           }] {
           	constraint := input.constraint
           	lib.get_constraint_params(constraint, params)
           	asset := input.asset
           	naming_rules := lib.get_default(params, "naming_rules", [])
           	count(naming_rules) > 0 # make sure that we have some rules to validate
           
           	patterns := check_asset_and_return_its_rules(asset.asset_type, naming_rules)
           	name := get_only_asset_name(asset.name)
           	no_name_match(name, patterns)
           	trace(sprintf("no match name:%v, patterns:%v", [name, patterns]))
           
           	message := sprintf("%v does not obey the naming convention. Full address: %v", [name, asset.name])
           	metadata := {
           		"asset_name": name,
           		"asset_full_address": asset.name,
           		"patterns": patterns,
           	}
           }
           
           get_only_asset_name(asset_full_name) = name {
           	# we are interested in the last part of the name,
           	# the rest is resource address
           	split_name := split(asset_full_name, "/")
           	last_index := count(split_name) - 1
           	name := split_name[last_index]
           }
           
           check_asset_and_return_its_rules(asset_type, naming_rules) = patterns {
           	rule = naming_rules[_]
           	rule.resource == asset_type
           	patterns = rule.patterns
           }
           
           no_name_match(asset_name, patterns) {
           	not match_name(asset_name, patterns)
           }
           
           match_name(name, patterns) {
           	re_match(patterns[_], name)
           }
           #ENDINLINE