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104 lines
2.7 KiB
Go
104 lines
2.7 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package policy
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import (
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"encoding/json"
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"github.com/minio/minio-go/v7/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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// Equals - returns true if principals are equal.
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func (p Principal) Equals(pp Principal) bool {
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return p.AWS.Equals(pp.AWS)
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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, 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 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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// Clone clones Principal structure
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func (p Principal) Clone() Principal {
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return NewPrincipal(p.AWS.ToSlice()...)
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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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