forked from go-acme/lego
-
Notifications
You must be signed in to change notification settings - Fork 1
/
rackspace.go
297 lines (244 loc) · 8.2 KB
/
rackspace.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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
// Package rackspace implements a DNS provider for solving the DNS-01
// challenge using rackspace DNS.
package rackspace
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"time"
"github.com/xenolf/lego/acme"
"github.com/xenolf/lego/platform/config/env"
)
// defaultBaseURL represents the Identity API endpoint to call
const defaultBaseURL = "https://identity.api.rackspacecloud.com/v2.0/tokens"
// 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("RACKSPACE_TTL", 300),
PropagationTimeout: env.GetOrDefaultSecond("RACKSPACE_PROPAGATION_TIMEOUT", acme.DefaultPropagationTimeout),
PollingInterval: env.GetOrDefaultSecond("RACKSPACE_POLLING_INTERVAL", acme.DefaultPollingInterval),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond("RACKSPACE_HTTP_TIMEOUT", 30*time.Second),
},
}
}
// DNSProvider is an implementation of the acme.ChallengeProvider interface
// used to store the reusable token and DNS API endpoint
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("RACKSPACE_USER", "RACKSPACE_API_KEY")
if err != nil {
return nil, fmt.Errorf("rackspace: %v", err)
}
config := NewDefaultConfig()
config.APIUser = values["RACKSPACE_USER"]
config.APIKey = values["RACKSPACE_API_KEY"]
return NewDNSProviderConfig(config)
}
// NewDNSProviderCredentials uses the supplied credentials
// to return a DNSProvider instance configured for Rackspace.
// It authenticates against the API, also grabbing the DNS Endpoint.
// Deprecated
func NewDNSProviderCredentials(user, key string) (*DNSProvider, error) {
config := NewDefaultConfig()
config.APIUser = user
config.APIKey = key
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, fmt.Errorf("rackspace: credentials missing")
}
identity, err := login(config)
if err != nil {
return nil, fmt.Errorf("rackspace: %v", 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, fmt.Errorf("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, _ := acme.DNS01Record(domain, keyAuth)
zoneID, err := d.getHostedZoneID(fqdn)
if err != nil {
return fmt.Errorf("rackspace: %v", err)
}
rec := Records{
Record: []Record{{
Name: acme.UnFqdn(fqdn),
Type: "TXT",
Data: value,
TTL: d.config.TTL,
}},
}
body, err := json.Marshal(rec)
if err != nil {
return fmt.Errorf("rackspace: %v", err)
}
_, err = d.makeRequest(http.MethodPost, fmt.Sprintf("/domains/%d/records", zoneID), bytes.NewReader(body))
if err != nil {
return fmt.Errorf("rackspace: %v", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
zoneID, err := d.getHostedZoneID(fqdn)
if err != nil {
return fmt.Errorf("rackspace: %v", err)
}
record, err := d.findTxtRecord(fqdn, zoneID)
if err != nil {
return fmt.Errorf("rackspace: %v", err)
}
_, err = d.makeRequest(http.MethodDelete, fmt.Sprintf("/domains/%d/records?id=%s", zoneID, record.ID), nil)
if err != nil {
return fmt.Errorf("rackspace: %v", 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
}
// getHostedZoneID performs a lookup to get the DNS zone which needs
// modifying for a given FQDN
func (d *DNSProvider) getHostedZoneID(fqdn string) (int, error) {
authZone, err := acme.FindZoneByFqdn(fqdn, acme.RecursiveNameservers)
if err != nil {
return 0, err
}
result, err := d.makeRequest(http.MethodGet, fmt.Sprintf("/domains?name=%s", acme.UnFqdn(authZone)), nil)
if err != nil {
return 0, err
}
var zoneSearchResponse ZoneSearchResponse
err = json.Unmarshal(result, &zoneSearchResponse)
if err != nil {
return 0, err
}
// If nothing was returned, or for whatever reason more than 1 was returned (the search uses exact match, so should not occur)
if zoneSearchResponse.TotalEntries != 1 {
return 0, fmt.Errorf("found %d zones for %s in Rackspace for domain %s", zoneSearchResponse.TotalEntries, authZone, fqdn)
}
return zoneSearchResponse.HostedZones[0].ID, nil
}
// findTxtRecord searches a DNS zone for a TXT record with a specific name
func (d *DNSProvider) findTxtRecord(fqdn string, zoneID int) (*Record, error) {
result, err := d.makeRequest(http.MethodGet, fmt.Sprintf("/domains/%d/records?type=TXT&name=%s", zoneID, acme.UnFqdn(fqdn)), nil)
if err != nil {
return nil, err
}
var records Records
err = json.Unmarshal(result, &records)
if err != nil {
return nil, err
}
switch len(records.Record) {
case 1:
case 0:
return nil, fmt.Errorf("no TXT record found for %s", fqdn)
default:
return nil, fmt.Errorf("more than 1 TXT record found for %s", fqdn)
}
return &records.Record[0], nil
}
// makeRequest is a wrapper function used for making DNS API requests
func (d *DNSProvider) makeRequest(method, uri string, body io.Reader) (json.RawMessage, error) {
url := d.cloudDNSEndpoint + uri
req, err := http.NewRequest(method, url, body)
if err != nil {
return nil, err
}
req.Header.Set("X-Auth-Token", d.token)
req.Header.Set("Content-Type", "application/json")
resp, err := d.config.HTTPClient.Do(req)
if err != nil {
return nil, fmt.Errorf("error querying DNS API: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {
return nil, fmt.Errorf("request failed for %s %s. Response code: %d", method, url, resp.StatusCode)
}
var r json.RawMessage
err = json.NewDecoder(resp.Body).Decode(&r)
if err != nil {
return nil, fmt.Errorf("JSON decode failed for %s %s. Response code: %d", method, url, resp.StatusCode)
}
return r, nil
}
func login(config *Config) (*Identity, error) {
authData := AuthData{
Auth: Auth{
APIKeyCredentials: APIKeyCredentials{
Username: config.APIUser,
APIKey: config.APIKey,
},
},
}
body, err := json.Marshal(authData)
if err != nil {
return nil, err
}
req, err := http.NewRequest(http.MethodPost, config.BaseURL, bytes.NewReader(body))
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", "application/json")
resp, err := config.HTTPClient.Do(req)
if err != nil {
return nil, fmt.Errorf("error querying Identity API: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("authentication failed: response code: %d", resp.StatusCode)
}
var identity Identity
err = json.NewDecoder(resp.Body).Decode(&identity)
if err != nil {
return nil, err
}
return &identity, nil
}