This repository has been archived by the owner on May 14, 2023. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
449 lines (358 loc) · 9.12 KB
/
main.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
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
// Copyright 2018 Google Inc. All Rights Reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package main
import (
"bytes"
"context"
"crypto/tls"
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"os/signal"
"runtime"
"strconv"
"syscall"
"time"
"cloud.google.com/go/storage"
"golang.org/x/oauth2/google"
"google.golang.org/api/cloudkms/v1"
"google.golang.org/api/option"
)
var (
vaultAddr string
gcsBucketName string
httpClient http.Client
githubOrganization string
githubAdminUser string
kmsService *cloudkms.Service
kmsKeyId string
storageClient *storage.Client
userAgent = fmt.Sprintf("vault-setup-github/1.0.0 (%s)", runtime.Version())
)
// AuthGithubConfigRequest holds a Github Config request
type AuthGithubConfigRequest struct {
Organization string `json:"organization"`
}
// AuthGithubMapUser holds a Github Config request
type AuthGithubMapUser struct {
Value string `json:"value"`
}
// AuthMethodsResponse result of auth method request
type AuthMethodsResponse struct {
Github interface{} `json:"github/"`
}
// ActivateAuthRequest holds a sys auth request
type ActivateAuthRequest struct {
Description string `json:"description"`
Type string `json:"type"`
}
// AddAdminPolicyRequest holds a create policy request
type AddAdminPolicyRequest struct {
Policy string `json:"policy"`
}
func main() {
log.Println("Starting the vault-setup-github service...")
vaultAddr = os.Getenv("VAULT_ADDR")
if vaultAddr == "" {
vaultAddr = "https://127.0.0.1:8200"
}
vaultInsecureSkipVerify := boolFromEnv("VAULT_SKIP_VERIFY", false)
githubOrganization = os.Getenv("GITHUB_ORGANIZATION")
if githubOrganization == "" {
log.Fatal("GITHUB_ORGANIZATION must be set and not empty")
}
githubAdminUser = os.Getenv("GITHUB_ADMIN_USER")
gcsBucketName = os.Getenv("GCS_BUCKET_NAME")
if gcsBucketName == "" {
log.Fatal("GCS_BUCKET_NAME must be set and not empty")
}
kmsKeyId = os.Getenv("KMS_KEY_ID")
if kmsKeyId == "" {
log.Fatal("KMS_KEY_ID must be set and not empty")
}
kmsCtx, kmsCtxCancel := context.WithCancel(context.Background())
defer kmsCtxCancel()
kmsClient, err := google.DefaultClient(kmsCtx, "https://www.googleapis.com/auth/cloudkms")
if err != nil {
log.Println(err)
return
}
kmsService, err = cloudkms.New(kmsClient)
if err != nil {
log.Println(err)
return
}
kmsService.UserAgent = userAgent
storageCtx, storageCtxCancel := context.WithCancel(context.Background())
defer storageCtxCancel()
storageClient, err = storage.NewClient(storageCtx,
option.WithUserAgent(userAgent),
option.WithScopes(storage.ScopeReadWrite),
)
if err != nil {
log.Fatal(err)
}
httpClient = http.Client{
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: vaultInsecureSkipVerify,
},
},
}
signalCh := make(chan os.Signal)
signal.Notify(signalCh,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGKILL,
)
stop := func() {
log.Printf("Shutting down")
kmsCtxCancel()
storageCtxCancel()
os.Exit(0)
}
response, err := httpClient.Head(vaultAddr + "/v1/sys/health")
if response != nil && response.Body != nil {
response.Body.Close()
}
if err != nil {
log.Println(err)
stop()
}
switch response.StatusCode {
case 200:
log.Println("Vault is initialized and unsealed.")
token, err := getRootToken()
if err != nil {
log.Println(err)
stop()
}
isActivated, err := isGithubActivated(token)
if err != nil {
log.Println(err)
stop()
}
if !isActivated {
log.Println("Github is not activated. Configure it now.")
configureGithubOrganization(token)
log.Println("Add admin policy")
addAdminPolicy(token)
if githubAdminUser != "" {
log.Println("Adding Github Admin user")
addGithubAdmin(token)
}
} else {
stop()
}
default:
log.Printf("Vault is in an unknown state. Status code: %d", response.StatusCode)
}
stop()
}
func getRootToken() (string, error) {
bucket := storageClient.Bucket(gcsBucketName)
ctx := context.Background()
rootTokenEnc, err := bucket.Object("root-token.enc").NewReader(ctx)
if err != nil {
return "", err
}
defer rootTokenEnc.Close()
rootTokenData, err := ioutil.ReadAll(rootTokenEnc)
if err != nil {
return "", err
}
rootTokenDecryptRequest := &cloudkms.DecryptRequest{
Ciphertext: string(rootTokenData),
}
rootTokenDecryptResponse, err := kmsService.Projects.Locations.KeyRings.CryptoKeys.Decrypt(kmsKeyId, rootTokenDecryptRequest).Do()
if err != nil {
return "", err
}
rootToken, err := base64.StdEncoding.DecodeString(rootTokenDecryptResponse.Plaintext)
if err != nil {
return "", err
}
return string(rootToken), nil
}
func isGithubActivated(rootToken string) (bool, error) {
request, err := http.NewRequest("GET", vaultAddr+"/v1/sys/auth", nil)
request.Header.Add("X-Vault-Token", string(rootToken))
response, err := httpClient.Do(request)
if err != nil {
return false, err
}
defer response.Body.Close()
authMethodsResponseBody, err := ioutil.ReadAll(response.Body)
if err != nil {
return false, err
}
var authMethods AuthMethodsResponse
if err := json.Unmarshal(authMethodsResponseBody, &authMethods); err != nil {
return false, err
}
if authMethods.Github != nil {
return true, nil
}
return false, nil
}
func addAdminPolicy(rootToken string) {
dat, err := ioutil.ReadFile("./admin-policy.hcl")
if err != nil {
log.Println(err)
return
}
addAdminPolicyRequest := AddAdminPolicyRequest{
Policy: string(dat),
}
addAdminPolicyRequestData, err := json.Marshal(&addAdminPolicyRequest)
if err != nil {
log.Println(err)
return
}
// log.Println(string(addAdminPolicyRequestData))
rard := bytes.NewReader(addAdminPolicyRequestData)
addPolicyRequest, err := http.NewRequest("PUT", vaultAddr+"/v1/sys/policies/acl/admin", rard)
addPolicyRequest.Header.Add("X-Vault-Token", string(rootToken))
if err != nil {
log.Println(err)
return
}
addPolicyRequestRes, err := httpClient.Do(addPolicyRequest)
if err != nil {
log.Println(err)
return
}
defer addPolicyRequestRes.Body.Close()
if addPolicyRequestRes.StatusCode != 204 {
log.Println("Was not able to add admin policy")
return
}
}
func configureGithubOrganization(rootToken string) {
activateAuthRequest := ActivateAuthRequest{
Description: "Automatically added by vault-setup-github",
Type: "github",
}
activateAuthRequestData, err := json.Marshal(&activateAuthRequest)
if err != nil {
log.Println(err)
return
}
rard := bytes.NewReader(activateAuthRequestData)
actRequest, err := http.NewRequest("POST", vaultAddr+"/v1/sys/auth/github", rard)
actRequest.Header.Add("X-Vault-Token", string(rootToken))
if err != nil {
log.Println(err)
return
}
activateAuthRes, err := httpClient.Do(actRequest)
if err != nil {
log.Println(err)
return
}
defer activateAuthRes.Body.Close()
if activateAuthRes.StatusCode != 204 {
log.Println("Was not able to activate github")
return
}
initRequest := AuthGithubConfigRequest{
Organization: githubOrganization,
}
initRequestData, err := json.Marshal(&initRequest)
if err != nil {
log.Println(err)
return
}
r := bytes.NewReader(initRequestData)
request, err := http.NewRequest("POST", vaultAddr+"/v1/auth/github/config", r)
request.Header.Add("X-Vault-Token", string(rootToken))
if err != nil {
log.Println(err)
return
}
response, err := httpClient.Do(request)
if err != nil {
log.Println(err)
return
}
responseBody, err := ioutil.ReadAll(response.Body)
if err != nil {
log.Println(err)
return
}
log.Println(string(responseBody))
defer response.Body.Close()
if response.StatusCode != 204 {
log.Println("Was not able to configure Github")
return
}
}
func addGithubAdmin(rootToken string) {
initRequest := AuthGithubMapUser{
Value: "admin",
}
initRequestData, err := json.Marshal(&initRequest)
if err != nil {
log.Println(err)
return
}
r := bytes.NewReader(initRequestData)
request, err := http.NewRequest("POST", vaultAddr+"/v1/auth/github/map/users/"+githubAdminUser, r)
request.Header.Add("X-Vault-Token", string(rootToken))
if err != nil {
log.Println(err)
return
}
response, err := httpClient.Do(request)
if err != nil {
log.Println(err)
return
}
defer response.Body.Close()
if response.StatusCode != 204 {
log.Println("Was not able to add administrator user to root policy")
return
}
}
func boolFromEnv(env string, def bool) bool {
val := os.Getenv(env)
if val == "" {
return def
}
b, err := strconv.ParseBool(val)
if err != nil {
log.Fatalf("failed to parse %q: %s", env, err)
}
return b
}
func intFromEnv(env string, def int) int {
val := os.Getenv(env)
if val == "" {
return def
}
i, err := strconv.Atoi(val)
if err != nil {
log.Fatalf("failed to parse %q: %s", env, err)
}
return i
}
func durFromEnv(env string, def time.Duration) time.Duration {
val := os.Getenv(env)
if val == "" {
return def
}
r := val[len(val)-1]
if r >= '0' || r <= '9' {
val = val + "s" // assume seconds
}
d, err := time.ParseDuration(val)
if err != nil {
log.Fatalf("failed to parse %q: %s", env, err)
}
return d
}