mirror of
https://github.com/minio/minio.git
synced 2024-12-28 16:15:56 -05:00
108 lines
3.0 KiB
Go
108 lines
3.0 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
|
|
//
|
|
// This file is part of MinIO Object Storage stack
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package condition
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"reflect"
|
|
"strconv"
|
|
)
|
|
|
|
// nullFunc - Null condition function. It checks whether Key is not present in given
|
|
// values or not.
|
|
// For example,
|
|
// 1. if Key = S3XAmzCopySource and Value = true, at evaluate() it returns whether
|
|
// S3XAmzCopySource is NOT in given value map or not.
|
|
// 2. if Key = S3XAmzCopySource and Value = false, at evaluate() it returns whether
|
|
// S3XAmzCopySource is in given value map or not.
|
|
// https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_condition_operators.html#Conditions_Null
|
|
type nullFunc struct {
|
|
k Key
|
|
value bool
|
|
}
|
|
|
|
// evaluate() - evaluates to check whether Key is present in given values or not.
|
|
// Depending on condition boolean value, this function returns true or false.
|
|
func (f nullFunc) evaluate(values map[string][]string) bool {
|
|
requestValue, ok := values[http.CanonicalHeaderKey(f.k.Name())]
|
|
if !ok {
|
|
requestValue = values[f.k.Name()]
|
|
}
|
|
|
|
if f.value {
|
|
return len(requestValue) == 0
|
|
}
|
|
|
|
return len(requestValue) != 0
|
|
}
|
|
|
|
// key() - returns condition key which is used by this condition function.
|
|
func (f nullFunc) key() Key {
|
|
return f.k
|
|
}
|
|
|
|
// name() - returns "Null" condition name.
|
|
func (f nullFunc) name() name {
|
|
return null
|
|
}
|
|
|
|
func (f nullFunc) String() string {
|
|
return fmt.Sprintf("%v:%v:%v", null, f.k, f.value)
|
|
}
|
|
|
|
// toMap - returns map representation of this function.
|
|
func (f nullFunc) toMap() map[Key]ValueSet {
|
|
if !f.k.IsValid() {
|
|
return nil
|
|
}
|
|
|
|
return map[Key]ValueSet{
|
|
f.k: NewValueSet(NewBoolValue(f.value)),
|
|
}
|
|
}
|
|
|
|
func newNullFunc(key Key, values ValueSet) (Function, error) {
|
|
if len(values) != 1 {
|
|
return nil, fmt.Errorf("only one value is allowed for Null condition")
|
|
}
|
|
|
|
var value bool
|
|
for v := range values {
|
|
switch v.GetType() {
|
|
case reflect.Bool:
|
|
value, _ = v.GetBool()
|
|
case reflect.String:
|
|
var err error
|
|
s, _ := v.GetString()
|
|
if value, err = strconv.ParseBool(s); err != nil {
|
|
return nil, fmt.Errorf("value must be a boolean string for Null condition")
|
|
}
|
|
default:
|
|
return nil, fmt.Errorf("value must be a boolean for Null condition")
|
|
}
|
|
}
|
|
|
|
return &nullFunc{key, value}, nil
|
|
}
|
|
|
|
// NewNullFunc - returns new Null function.
|
|
func NewNullFunc(key Key, value bool) (Function, error) {
|
|
return &nullFunc{key, value}, nil
|
|
}
|