-
-
Notifications
You must be signed in to change notification settings - Fork 984
/
epik.go
159 lines (128 loc) · 4.38 KB
/
epik.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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
// Package epik implements a DNS provider for solving the DNS-01 challenge using Epik.
package epik
import (
"context"
"errors"
"fmt"
"net/http"
"strings"
"time"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
"github.com/go-acme/lego/v4/providers/dns/epik/internal"
)
// Environment variables names.
const (
envNamespace = "EPIK_"
EnvSignature = envNamespace + "SIGNATURE"
EnvTTL = envNamespace + "TTL"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
)
// Config is used to configure the creation of the DNSProvider.
type Config struct {
Signature string
PropagationTimeout time.Duration
PollingInterval time.Duration
TTL int
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
TTL: env.GetOrDefaultInt(EnvTTL, 3600),
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
},
}
}
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
config *Config
client *internal.Client
}
// NewDNSProvider returns a DNSProvider instance configured for Epik.
// Credentials must be passed in the environment variable: EPIK_SIGNATURE.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvSignature)
if err != nil {
return nil, fmt.Errorf("epik: %w", err)
}
config := NewDefaultConfig()
config.Signature = values[EnvSignature]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for Epik.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("epik: the configuration of the DNS provider is nil")
}
if config.Signature == "" {
return nil, errors.New("epik: missing credentials")
}
client := internal.NewClient(config.Signature)
if config.HTTPClient != nil {
client.HTTPClient = config.HTTPClient
}
return &DNSProvider{config: config, client: client}, nil
}
// Timeout returns the timeout and interval to use when checking for DNS propagation.
// Adjusting here to cope with spikes in propagation times.
func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
return d.config.PropagationTimeout, d.config.PollingInterval
}
// Present creates a TXT record using the specified parameters.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
info := dns01.GetChallengeInfo(domain, keyAuth)
// find authZone
authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
if err != nil {
return fmt.Errorf("epik: could not find zone for domain %q (%s): %w", domain, info.EffectiveFQDN, err)
}
subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, authZone)
if err != nil {
return fmt.Errorf("epik: %w", err)
}
record := internal.RecordRequest{
Host: subDomain,
Type: "TXT",
Data: info.Value,
TTL: d.config.TTL,
}
_, err = d.client.CreateHostRecord(context.Background(), dns01.UnFqdn(authZone), record)
if err != nil {
return fmt.Errorf("epik: %w", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
info := dns01.GetChallengeInfo(domain, keyAuth)
// find authZone
authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
if err != nil {
return fmt.Errorf("epik: could not find zone for domain %q (%s): %w", domain, info.EffectiveFQDN, err)
}
dom := dns01.UnFqdn(authZone)
ctx := context.Background()
records, err := d.client.GetDNSRecords(ctx, dom)
if err != nil {
return fmt.Errorf("epik: %w", err)
}
subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, authZone)
if err != nil {
return fmt.Errorf("epik: %w", err)
}
for _, record := range records {
if strings.EqualFold(record.Type, "TXT") && record.Data == info.Value && record.Name == subDomain {
_, err = d.client.RemoveHostRecord(ctx, dom, record.ID)
if err != nil {
return fmt.Errorf("epik: %w", err)
}
}
}
return nil
}