/
security.go
145 lines (124 loc) · 4.26 KB
/
security.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
144
145
/*
*
* MIT License
*
* (C) Copyright 2022 Hewlett Packard Enterprise Development LP
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
package main
import (
"encoding/json"
"errors"
"fmt"
"github.com/Cray-HPE/cray-powerdns-manager/internal/common"
"github.com/joeig/go-powerdns/v2"
"io/ioutil"
"net/http"
"strings"
)
const tsigExtension = ".tsig"
var (
DNSKeys []common.DNSKey
)
func ParseDNSKeys() error {
if *keyDirectory == "" {
return fmt.Errorf("blank key directory")
}
files, err := ioutil.ReadDir(*keyDirectory)
if err != nil {
return fmt.Errorf("failed to read key directory: %w", err)
}
for _, privateKeyFile := range files {
if privateKeyFile.IsDir() || strings.HasPrefix(privateKeyFile.Name(), ".") {
continue
}
privateKeyData, err := ioutil.ReadFile(fmt.Sprintf("%s/%s", *keyDirectory, privateKeyFile.Name()))
if err != nil {
return fmt.Errorf("failed to read key file: %w", err)
}
var keyType common.DNSKeyType
keyName := privateKeyFile.Name()
// Intuit the type from the name. If it has a .tsig extension, assume it to be so.
if strings.HasSuffix(privateKeyFile.Name(), tsigExtension) {
keyType = common.TSIGKeyType
// Whack off this extension for use everywhere else.
keyName = strings.TrimSuffix(keyName, tsigExtension)
} else {
keyType = common.DNSSecKeyType
}
DNSKeys = append(DNSKeys, common.DNSKey{
Name: keyName,
Data: string(privateKeyData),
Type: keyType,
})
}
return nil
}
func AddCryptokeyToZone(key common.DNSKey) error {
newCryptokey := powerdns.Cryptokey{
KeyType: powerdns.String("csk"),
Active: powerdns.Bool(true),
Privatekey: powerdns.String(key.Data),
}
_, err := pdns.Cryptokeys.Add(key.Name, &newCryptokey)
if err != nil {
return fmt.Errorf("failed to add cryptokey to zone: %w", err)
}
return nil
}
func AddOrUpdateTSIGKey(key common.DNSKey) error {
var existingTSIGKey *powerdns.TSIGKey
var newTSIGKey *powerdns.TSIGKey
var err error
// The data in the DNSKey is actually a JSON block that if the user did as instructed can be natively unmarshalled
// into the PowerDNS struct.
jsonErr := json.Unmarshal([]byte(key.Data), &newTSIGKey)
if jsonErr != nil {
return fmt.Errorf("failed to unmarshal TSIG key: %w", jsonErr)
}
// Get any existing key by this name.
existingTSIGKey, err = pdns.TSIGKeys.Get(key.Name)
var pdnsErr *powerdns.Error
if err != nil {
if errors.As(err, &pdnsErr) {
// If we end up here then some PowerDNS API error occurred, ignore 404 as the key may not exist yet.
if pdnsErr.StatusCode != http.StatusNotFound {
return fmt.Errorf("failed to perform TSIG key lookup: %w", pdnsErr)
}
} else {
// More general error case. Connection refused, connection timeout etc.
return fmt.Errorf("failed to perform TSIG key lookup: %w", err)
}
}
// At this point the key either has a value in the structure or it's nil. Check if we need to add or update.
var addOrUpdateErr error
if existingTSIGKey.Key != nil {
if *existingTSIGKey.Key != *newTSIGKey.Key {
_, addOrUpdateErr = pdns.TSIGKeys.Replace(key.Name, newTSIGKey)
}
} else {
_, addOrUpdateErr = pdns.TSIGKeys.Add(newTSIGKey)
}
if addOrUpdateErr != nil {
return fmt.Errorf("failed to add TSIG key: %w", addOrUpdateErr)
}
return nil
}