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
160
161
162
163
164
165
166
167
168
169
170
|
// Package rackspace implements a DNS provider for solving the DNS-01 challenge using rackspace DNS.
package rackspace
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"net/http"
"time"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
)
// defaultBaseURL represents the Identity API endpoint to call.
const defaultBaseURL = "https://identity.api.rackspacecloud.com/v2.0/tokens"
// Environment variables names.
const (
envNamespace = "RACKSPACE_"
EnvUser = envNamespace + "USER"
EnvAPIKey = envNamespace + "API_KEY"
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 {
BaseURL string
APIUser string
APIKey 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{
BaseURL: defaultBaseURL,
TTL: env.GetOrDefaultInt(EnvTTL, 300),
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
token string
cloudDNSEndpoint string
}
// NewDNSProvider returns a DNSProvider instance configured for Rackspace.
// Credentials must be passed in the environment variables:
// RACKSPACE_USER and RACKSPACE_API_KEY.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvUser, EnvAPIKey)
if err != nil {
return nil, fmt.Errorf("rackspace: %w", err)
}
config := NewDefaultConfig()
config.APIUser = values[EnvUser]
config.APIKey = values[EnvAPIKey]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for Rackspace.
// It authenticates against the API, also grabbing the DNS Endpoint.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("rackspace: the configuration of the DNS provider is nil")
}
if config.APIUser == "" || config.APIKey == "" {
return nil, errors.New("rackspace: credentials missing")
}
identity, err := login(config)
if err != nil {
return nil, fmt.Errorf("rackspace: %w", err)
}
// Iterate through the Service Catalog to get the DNS Endpoint
var dnsEndpoint string
for _, service := range identity.Access.ServiceCatalog {
if service.Name == "cloudDNS" {
dnsEndpoint = service.Endpoints[0].PublicURL
break
}
}
if dnsEndpoint == "" {
return nil, errors.New("rackspace: failed to populate DNS endpoint, check Rackspace API for changes")
}
return &DNSProvider{
config: config,
token: identity.Access.Token.ID,
cloudDNSEndpoint: dnsEndpoint,
}, nil
}
// Present creates a TXT record to fulfill the dns-01 challenge.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
zoneID, err := d.getHostedZoneID(fqdn)
if err != nil {
return fmt.Errorf("rackspace: %w", err)
}
rec := Records{
Record: []Record{{
Name: dns01.UnFqdn(fqdn),
Type: "TXT",
Data: value,
TTL: d.config.TTL,
}},
}
body, err := json.Marshal(rec)
if err != nil {
return fmt.Errorf("rackspace: %w", err)
}
_, err = d.makeRequest(http.MethodPost, fmt.Sprintf("/domains/%s/records", zoneID), bytes.NewReader(body))
if err != nil {
return fmt.Errorf("rackspace: %w", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _ := dns01.GetRecord(domain, keyAuth)
zoneID, err := d.getHostedZoneID(fqdn)
if err != nil {
return fmt.Errorf("rackspace: %w", err)
}
record, err := d.findTxtRecord(fqdn, zoneID)
if err != nil {
return fmt.Errorf("rackspace: %w", err)
}
_, err = d.makeRequest(http.MethodDelete, fmt.Sprintf("/domains/%s/records?id=%s", zoneID, record.ID), nil)
if err != nil {
return fmt.Errorf("rackspace: %w", err)
}
return 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
}
|
