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
|
// Package vultr implements a DNS provider for solving the DNS-01 challenge using
// the vultr DNS.
// See https://www.vultr.com/api/#dns
package vultr
import (
"fmt"
"os"
"strings"
vultr "github.com/JamesClonk/vultr/lib"
"github.com/xenolf/lego/acme"
)
// DNSProvider is an implementation of the acme.ChallengeProvider interface.
type DNSProvider struct {
client *vultr.Client
}
// NewDNSProvider returns a DNSProvider instance with a configured Vultr client.
// Authentication uses the VULTR_API_KEY environment variable.
func NewDNSProvider() (*DNSProvider, error) {
apiKey := os.Getenv("VULTR_API_KEY")
return NewDNSProviderCredentials(apiKey)
}
// NewDNSProviderCredentials uses the supplied credentials to return a DNSProvider
// instance configured for Vultr.
func NewDNSProviderCredentials(apiKey string) (*DNSProvider, error) {
if apiKey == "" {
return nil, fmt.Errorf("Vultr credentials missing")
}
c := &DNSProvider{
client: vultr.NewClient(apiKey, nil),
}
return c, nil
}
// Present creates a TXT record to fulfil the DNS-01 challenge.
func (c *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value, ttl := acme.DNS01Record(domain, keyAuth)
zoneDomain, err := c.getHostedZone(domain)
if err != nil {
return err
}
name := c.extractRecordName(fqdn, zoneDomain)
err = c.client.CreateDNSRecord(zoneDomain, name, "TXT", `"`+value+`"`, 0, ttl)
if err != nil {
return fmt.Errorf("Vultr API call failed: %v", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (c *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
zoneDomain, records, err := c.findTxtRecords(domain, fqdn)
if err != nil {
return err
}
for _, rec := range records {
err := c.client.DeleteDNSRecord(zoneDomain, rec.RecordID)
if err != nil {
return err
}
}
return nil
}
func (c *DNSProvider) getHostedZone(domain string) (string, error) {
domains, err := c.client.GetDNSDomains()
if err != nil {
return "", fmt.Errorf("Vultr API call failed: %v", err)
}
var hostedDomain vultr.DNSDomain
for _, d := range domains {
if strings.HasSuffix(domain, d.Domain) {
if len(d.Domain) > len(hostedDomain.Domain) {
hostedDomain = d
}
}
}
if hostedDomain.Domain == "" {
return "", fmt.Errorf("No matching Vultr domain found for domain %s", domain)
}
return hostedDomain.Domain, nil
}
func (c *DNSProvider) findTxtRecords(domain, fqdn string) (string, []vultr.DNSRecord, error) {
zoneDomain, err := c.getHostedZone(domain)
if err != nil {
return "", nil, err
}
var records []vultr.DNSRecord
result, err := c.client.GetDNSRecords(zoneDomain)
if err != nil {
return "", records, fmt.Errorf("Vultr API call has failed: %v", err)
}
recordName := c.extractRecordName(fqdn, zoneDomain)
for _, record := range result {
if record.Type == "TXT" && record.Name == recordName {
records = append(records, record)
}
}
return zoneDomain, records, nil
}
func (c *DNSProvider) extractRecordName(fqdn, domain string) string {
name := acme.UnFqdn(fqdn)
if idx := strings.Index(name, "."+domain); idx != -1 {
return name[:idx]
}
return name
}
|
