forked from minio/minio
-
Notifications
You must be signed in to change notification settings - Fork 0
/
binaryequalsfunc.go
143 lines (123 loc) · 4.05 KB
/
binaryequalsfunc.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/*
* 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 condition
import (
"encoding/base64"
"fmt"
"net/http"
"sort"
"github.com/minio/minio-go/v7/pkg/s3utils"
"github.com/minio/minio-go/v7/pkg/set"
)
func toBinaryEqualsFuncString(n name, key Key, values set.StringSet) string {
valueStrings := values.ToSlice()
sort.Strings(valueStrings)
return fmt.Sprintf("%v:%v:%v", n, key, valueStrings)
}
// binaryEqualsFunc - String equals function. It checks whether value by Key in given
// values map is in condition values.
// For example,
// - if values = ["mybucket/foo"], at evaluate() it returns whether string
// in value map for Key is in values.
type binaryEqualsFunc struct {
k Key
values set.StringSet
}
// evaluate() - evaluates to check whether value by Key in given values is in
// condition values.
func (f binaryEqualsFunc) evaluate(values map[string][]string) bool {
requestValue, ok := values[http.CanonicalHeaderKey(f.k.Name())]
if !ok {
requestValue = values[f.k.Name()]
}
fvalues := f.values.ApplyFunc(substFuncFromValues(values))
return !fvalues.Intersection(set.CreateStringSet(requestValue...)).IsEmpty()
}
// key() - returns condition key which is used by this condition function.
func (f binaryEqualsFunc) key() Key {
return f.k
}
// name() - returns "BinaryEquals" condition name.
func (f binaryEqualsFunc) name() name {
return binaryEquals
}
func (f binaryEqualsFunc) String() string {
return toBinaryEqualsFuncString(binaryEquals, f.k, f.values)
}
// toMap - returns map representation of this function.
func (f binaryEqualsFunc) toMap() map[Key]ValueSet {
if !f.k.IsValid() {
return nil
}
values := NewValueSet()
for _, value := range f.values.ToSlice() {
values.Add(NewStringValue(base64.StdEncoding.EncodeToString([]byte(value))))
}
return map[Key]ValueSet{
f.k: values,
}
}
func validateBinaryEqualsValues(n name, key Key, values set.StringSet) error {
vslice := values.ToSlice()
for _, s := range vslice {
sbytes, err := base64.StdEncoding.DecodeString(s)
if err != nil {
return err
}
values.Remove(s)
s = string(sbytes)
switch key {
case S3XAmzCopySource:
bucket, object := path2BucketAndObject(s)
if object == "" {
return fmt.Errorf("invalid value '%v' for '%v' for %v condition", s, S3XAmzCopySource, n)
}
if err = s3utils.CheckValidBucketName(bucket); err != nil {
return err
}
case S3XAmzServerSideEncryption, S3XAmzServerSideEncryptionCustomerAlgorithm:
if s != "AES256" {
return fmt.Errorf("invalid value '%v' for '%v' for %v condition", s, S3XAmzServerSideEncryption, n)
}
case S3XAmzMetadataDirective:
if s != "COPY" && s != "REPLACE" {
return fmt.Errorf("invalid value '%v' for '%v' for %v condition", s, S3XAmzMetadataDirective, n)
}
case S3XAmzContentSha256:
if s == "" {
return fmt.Errorf("invalid empty value for '%v' for %v condition", S3XAmzContentSha256, n)
}
}
values.Add(s)
}
return nil
}
// newBinaryEqualsFunc - returns new BinaryEquals function.
func newBinaryEqualsFunc(key Key, values ValueSet) (Function, error) {
valueStrings, err := valuesToStringSlice(binaryEquals, values)
if err != nil {
return nil, err
}
return NewBinaryEqualsFunc(key, valueStrings...)
}
// NewBinaryEqualsFunc - returns new BinaryEquals function.
func NewBinaryEqualsFunc(key Key, values ...string) (Function, error) {
sset := set.CreateStringSet(values...)
if err := validateBinaryEqualsValues(binaryEquals, key, sset); err != nil {
return nil, err
}
return &binaryEqualsFunc{key, sset}, nil
}