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93 lines
2.3 KiB
93 lines
2.3 KiB
7 years ago
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/*
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* Minio Cloud Storage, (C) 2018 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package policy
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import (
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"encoding/json"
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"fmt"
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"github.com/minio/minio-go/pkg/set"
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"github.com/minio/minio/pkg/wildcard"
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)
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// Principal - policy principal.
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type Principal struct {
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AWS set.StringSet
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}
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// IsValid - checks whether Principal is valid or not.
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func (p Principal) IsValid() bool {
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return len(p.AWS) != 0
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}
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// Intersection - returns principals available in both Principal.
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func (p Principal) Intersection(principal Principal) set.StringSet {
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return p.AWS.Intersection(principal.AWS)
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}
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// MarshalJSON - encodes Principal to JSON data.
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func (p Principal) MarshalJSON() ([]byte, error) {
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if !p.IsValid() {
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return nil, fmt.Errorf("invalid principal %v", p)
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}
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// subtype to avoid recursive call to MarshalJSON()
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type subPrincipal Principal
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sp := subPrincipal(p)
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return json.Marshal(sp)
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}
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// Match - matches given principal is wildcard matching with Principal.
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func (p Principal) Match(principal string) bool {
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for _, pattern := range p.AWS.ToSlice() {
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if wildcard.MatchSimple(pattern, principal) {
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return true
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}
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}
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return false
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}
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// UnmarshalJSON - decodes JSON data to Principal.
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func (p *Principal) UnmarshalJSON(data []byte) error {
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// subtype to avoid recursive call to UnmarshalJSON()
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type subPrincipal Principal
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var sp subPrincipal
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if err := json.Unmarshal(data, &sp); err != nil {
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var s string
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if err = json.Unmarshal(data, &s); err != nil {
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return err
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}
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if s != "*" {
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return fmt.Errorf("invalid principal '%v'", s)
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}
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sp.AWS = set.CreateStringSet("*")
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}
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*p = Principal(sp)
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return nil
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}
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// NewPrincipal - creates new Principal.
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func NewPrincipal(principals ...string) Principal {
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return Principal{AWS: set.CreateStringSet(principals...)}
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}
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