gcp_dnssec_prevent_rsasha1_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-dnssec-prevent-rsasha1-v1
spec:
  crd:
    spec:
      names:
        kind: GCPDNSSECPreventRSASHA1ConstraintV1
      validation:
        openAPIV3Schema:
          properties:
            keyType:
              description: This can be ZONE_SIGNING, KEY_SIGNING, or omitted to match any type.
              type: string
  targets:
    validation.gcp.forsetisecurity.org:
      rego: | #INLINE("validator/dnssec_prevent_rsasha1.rego")
            #
            # Copyright 2018 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.GCPDNSSECPreventRSASHA1ConstraintV1
            
            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 == "dns.googleapis.com/ManagedZone"
            
            	dnssecConfig := asset.resource.data.dnssecConfig
            
            	keySpec := dnssecConfig.defaultKeySpecs[_]
            
            	keySpec.algorithm == "RSASHA1"
            
            	check_key_type(params, keySpec)
            
            	message := sprintf("%v: DNSSEC has weak RSASHA1 algorithm enabled", [asset.name])
            	metadata := {"resource": asset.name}
            }
            
            check_key_type(params, keySpec) {
            	lib.has_field(params, "keyType")
            	keySpec.keyType == params.keyType
            }
            
            check_key_type(params, keySpec) {
            	not lib.has_field(params, "keyType")
            }
            #ENDINLINE