-
Notifications
You must be signed in to change notification settings - Fork 0
/
object.go
141 lines (117 loc) · 3.36 KB
/
object.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
// Copyright © 2021 Banzai Cloud
//
// 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 webhook
import (
"fmt"
"strings"
"emperror.dev/errors"
injector "github.com/bank-vaults/internal/pkg/vaultinjector"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"github.com/bank-vaults/secrets-webhook/pkg/common"
)
type element interface {
Set(v interface{})
Get() interface{}
}
type iterator <-chan element
type mapElement struct {
m map[string]interface{}
k string
}
func (e *mapElement) Set(v interface{}) {
e.m[e.k] = v
}
func (e *mapElement) Get() interface{} {
return e.m[e.k]
}
type sliceElement struct {
s []interface{}
i int
}
func (e *sliceElement) Set(v interface{}) {
e.s[e.i] = v
}
func (e *sliceElement) Get() interface{} {
return e.s[e.i]
}
func mapIterator(m map[string]interface{}) iterator {
c := make(chan element, len(m))
for k := range m {
c <- &mapElement{k: k, m: m}
}
close(c)
return c
}
func sliceIterator(s []interface{}) iterator {
c := make(chan element, len(s))
for i := range s {
c <- &sliceElement{i: i, s: s}
}
close(c)
return c
}
func traverseObject(o interface{}, secretInjector *injector.SecretInjector) error {
var iterator iterator
switch value := o.(type) {
case map[string]interface{}:
iterator = mapIterator(value)
case []interface{}:
iterator = sliceIterator(value)
default:
return nil
}
for e := range iterator {
switch s := e.Get().(type) {
case string:
if common.HasVaultPrefix(s) {
dataFromVault, err := secretInjector.GetDataFromVault(map[string]string{"data": s})
if err != nil {
return err
}
e.Set(dataFromVault["data"])
} else if injector.HasInlineVaultDelimiters(s) {
dataFromVault := s
for _, vaultSecretReference := range injector.FindInlineVaultDelimiters(s) {
mapData, err := secretInjector.GetDataFromVault(map[string]string{"data": vaultSecretReference[1]})
if err != nil {
return err
}
dataFromVault = strings.Replace(dataFromVault, vaultSecretReference[0], mapData["data"], -1)
}
e.Set(dataFromVault)
}
case map[string]interface{}, []interface{}:
err := traverseObject(e.Get(), secretInjector)
if err != nil {
return err
}
}
}
return nil
}
func (mw *MutatingWebhook) MutateObject(object *unstructured.Unstructured, vaultConfig VaultConfig) error {
mw.logger.Debug(fmt.Sprintf("mutating object: %s.%s", object.GetNamespace(), object.GetName()))
vaultClient, err := mw.newVaultClient(vaultConfig)
if err != nil {
return errors.Wrap(err, "failed to create vault client")
}
defer vaultClient.Close()
config := injector.Config{
TransitKeyID: vaultConfig.TransitKeyID,
TransitPath: vaultConfig.TransitPath,
TransitBatchSize: vaultConfig.TransitBatchSize,
}
secretInjector := injector.NewSecretInjector(config, vaultClient, nil, logger)
return traverseObject(object.Object, &secretInjector)
}