93 lines
2.3 KiB
Go
93 lines
2.3 KiB
Go
|
/*
|
||
|
* 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 policy
|
||
|
|
||
|
import (
|
||
|
"encoding/json"
|
||
|
"fmt"
|
||
|
|
||
|
"github.com/minio/minio-go/pkg/set"
|
||
|
"github.com/minio/minio/pkg/wildcard"
|
||
|
)
|
||
|
|
||
|
// Principal - policy principal.
|
||
|
type Principal struct {
|
||
|
AWS set.StringSet
|
||
|
}
|
||
|
|
||
|
// IsValid - checks whether Principal is valid or not.
|
||
|
func (p Principal) IsValid() bool {
|
||
|
return len(p.AWS) != 0
|
||
|
}
|
||
|
|
||
|
// Intersection - returns principals available in both Principal.
|
||
|
func (p Principal) Intersection(principal Principal) set.StringSet {
|
||
|
return p.AWS.Intersection(principal.AWS)
|
||
|
}
|
||
|
|
||
|
// MarshalJSON - encodes Principal to JSON data.
|
||
|
func (p Principal) MarshalJSON() ([]byte, error) {
|
||
|
if !p.IsValid() {
|
||
|
return nil, fmt.Errorf("invalid principal %v", p)
|
||
|
}
|
||
|
|
||
|
// subtype to avoid recursive call to MarshalJSON()
|
||
|
type subPrincipal Principal
|
||
|
sp := subPrincipal(p)
|
||
|
return json.Marshal(sp)
|
||
|
}
|
||
|
|
||
|
// Match - matches given principal is wildcard matching with Principal.
|
||
|
func (p Principal) Match(principal string) bool {
|
||
|
for _, pattern := range p.AWS.ToSlice() {
|
||
|
if wildcard.MatchSimple(pattern, principal) {
|
||
|
return true
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
// UnmarshalJSON - decodes JSON data to Principal.
|
||
|
func (p *Principal) UnmarshalJSON(data []byte) error {
|
||
|
// subtype to avoid recursive call to UnmarshalJSON()
|
||
|
type subPrincipal Principal
|
||
|
var sp subPrincipal
|
||
|
|
||
|
if err := json.Unmarshal(data, &sp); err != nil {
|
||
|
var s string
|
||
|
if err = json.Unmarshal(data, &s); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
if s != "*" {
|
||
|
return fmt.Errorf("invalid principal '%v'", s)
|
||
|
}
|
||
|
|
||
|
sp.AWS = set.CreateStringSet("*")
|
||
|
}
|
||
|
|
||
|
*p = Principal(sp)
|
||
|
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// NewPrincipal - creates new Principal.
|
||
|
func NewPrincipal(principals ...string) Principal {
|
||
|
return Principal{AWS: set.CreateStringSet(principals...)}
|
||
|
}
|