/* * MinIO Cloud Storage, (C) 2018 MinIO, Inc. * * 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 iampolicy import ( "encoding/json" "fmt" "sort" "github.com/minio/minio-go/pkg/set" ) // ResourceSet - set of resources in policy statement. type ResourceSet map[Resource]struct{} // bucketResourceExists - checks if at least one bucket resource exists in the set. func (resourceSet ResourceSet) bucketResourceExists() bool { for resource := range resourceSet { if resource.isBucketPattern() { return true } } return false } // objectResourceExists - checks if at least one object resource exists in the set. func (resourceSet ResourceSet) objectResourceExists() bool { for resource := range resourceSet { if resource.isObjectPattern() { return true } } return false } // Add - adds resource to resource set. func (resourceSet ResourceSet) Add(resource Resource) { resourceSet[resource] = struct{}{} } // Intersection - returns resources available in both ResourceSet. func (resourceSet ResourceSet) Intersection(sset ResourceSet) ResourceSet { nset := NewResourceSet() for k := range resourceSet { if _, ok := sset[k]; ok { nset.Add(k) } } return nset } // MarshalJSON - encodes ResourceSet to JSON data. func (resourceSet ResourceSet) MarshalJSON() ([]byte, error) { if len(resourceSet) == 0 { return nil, fmt.Errorf("empty resource set") } resources := []Resource{} for resource := range resourceSet { resources = append(resources, resource) } return json.Marshal(resources) } // Match - matches object name with anyone of resource pattern in resource set. func (resourceSet ResourceSet) Match(resource string, conditionValues map[string][]string) bool { for r := range resourceSet { if r.Match(resource, conditionValues) { return true } } return false } func (resourceSet ResourceSet) String() string { resources := []string{} for resource := range resourceSet { resources = append(resources, resource.String()) } sort.Strings(resources) return fmt.Sprintf("%v", resources) } // UnmarshalJSON - decodes JSON data to ResourceSet. func (resourceSet *ResourceSet) UnmarshalJSON(data []byte) error { var sset set.StringSet if err := json.Unmarshal(data, &sset); err != nil { return err } *resourceSet = make(ResourceSet) for _, s := range sset.ToSlice() { resource, err := parseResource(s) if err != nil { return err } if _, found := (*resourceSet)[resource]; found { return fmt.Errorf("duplicate resource '%v' found", s) } resourceSet.Add(resource) } return nil } // Validate - validates ResourceSet. func (resourceSet ResourceSet) Validate() error { for resource := range resourceSet { if err := resource.Validate(); err != nil { return err } } return nil } // NewResourceSet - creates new resource set. func NewResourceSet(resources ...Resource) ResourceSet { resourceSet := make(ResourceSet) for _, resource := range resources { resourceSet.Add(resource) } return resourceSet }