-
Notifications
You must be signed in to change notification settings - Fork 443
/
apiserver.go
409 lines (370 loc) · 10.8 KB
/
apiserver.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
package apiserver
import (
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"os"
"strings"
"time"
"github.com/crowdsecurity/crowdsec/pkg/apiserver/controllers"
v1 "github.com/crowdsecurity/crowdsec/pkg/apiserver/middlewares/v1"
"github.com/crowdsecurity/crowdsec/pkg/csconfig"
"github.com/crowdsecurity/crowdsec/pkg/csplugin"
"github.com/crowdsecurity/crowdsec/pkg/database"
"github.com/crowdsecurity/crowdsec/pkg/types"
"github.com/gin-gonic/gin"
"github.com/go-co-op/gocron"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"gopkg.in/natefinch/lumberjack.v2"
"gopkg.in/tomb.v2"
)
var (
keyLength = 32
)
type APIServer struct {
URL string
TLS *csconfig.TLSCfg
dbClient *database.Client
logFile string
controller *controllers.Controller
flushScheduler *gocron.Scheduler
router *gin.Engine
httpServer *http.Server
apic *apic
httpServerTomb tomb.Tomb
consoleConfig *csconfig.ConsoleConfig
}
// RecoveryWithWriter returns a middleware for a given writer that recovers from any panics and writes a 500 if there was one.
func CustomRecoveryWithWriter() gin.HandlerFunc {
return func(c *gin.Context) {
defer func() {
if err := recover(); err != nil {
// Check for a broken connection, as it is not really a
// condition that warrants a panic stack trace.
var brokenPipe bool
if ne, ok := err.(*net.OpError); ok {
if se, ok := ne.Err.(*os.SyscallError); ok {
if strings.Contains(strings.ToLower(se.Error()), "broken pipe") || strings.Contains(strings.ToLower(se.Error()), "connection reset by peer") {
brokenPipe = true
}
}
}
// because of https://github.com/golang/net/blob/39120d07d75e76f0079fe5d27480bcb965a21e4c/http2/server.go
// and because it seems gin doesn't handle those neither, we need to "hand define" some errors to properly catch them
if strErr, ok := err.(error); ok {
//stolen from http2/server.go in x/net
var (
errClientDisconnected = errors.New("client disconnected")
errClosedBody = errors.New("body closed by handler")
errHandlerComplete = errors.New("http2: request body closed due to handler exiting")
errStreamClosed = errors.New("http2: stream closed")
)
if strErr == errClientDisconnected ||
strErr == errClosedBody ||
strErr == errHandlerComplete ||
strErr == errStreamClosed {
brokenPipe = true
}
}
if brokenPipe {
log.Warningf("client %s disconnected : %s", c.ClientIP(), err)
c.Abort()
} else {
filename := types.WriteStackTrace(err)
log.Warningf("client %s error : %s", c.ClientIP(), err)
log.Warningf("stacktrace written to %s, please join to your issue", filename)
c.AbortWithStatus(http.StatusInternalServerError)
}
}
}()
c.Next()
}
}
func NewServer(config *csconfig.LocalApiServerCfg) (*APIServer, error) {
var flushScheduler *gocron.Scheduler
dbClient, err := database.NewClient(config.DbConfig)
if err != nil {
return &APIServer{}, errors.Wrap(err, "unable to init database client")
}
if config.DbConfig.Flush != nil {
flushScheduler, err = dbClient.StartFlushScheduler(config.DbConfig.Flush)
if err != nil {
return &APIServer{}, err
}
}
logFile := ""
if config.LogMedia == "file" {
logFile = fmt.Sprintf("%s/crowdsec_api.log", config.LogDir)
}
if log.GetLevel() < log.DebugLevel {
gin.SetMode(gin.ReleaseMode)
}
log.Debugf("starting router, logging to %s", logFile)
router := gin.New()
if config.TrustedProxies != nil && config.UseForwardedForHeaders {
if err := router.SetTrustedProxies(*config.TrustedProxies); err != nil {
return &APIServer{}, errors.Wrap(err, "while setting trusted_proxies")
}
router.ForwardedByClientIP = true
} else {
router.ForwardedByClientIP = false
}
/*The logger that will be used by handlers*/
clog := log.New()
if err := types.ConfigureLogger(clog); err != nil {
return nil, errors.Wrap(err, "while configuring gin logger")
}
if config.LogLevel != nil {
clog.SetLevel(*config.LogLevel)
}
/*Configure logs*/
if logFile != "" {
_maxsize := 500
if config.LogMaxSize != 0 {
_maxsize = config.LogMaxSize
}
_maxfiles := 3
if config.LogMaxFiles != 0 {
_maxfiles = config.LogMaxFiles
}
_maxage := 28
if config.LogMaxAge != 0 {
_maxage = config.LogMaxAge
}
_compress := true
if config.CompressLogs != nil {
_compress = *config.CompressLogs
}
/*cf. https://github.com/natefinch/lumberjack/issues/82
let's create the file beforehand w/ the right perms */
// check if file exists
_, err := os.Stat(logFile)
// create file if not exists, purposefully ignore errors
if os.IsNotExist(err) {
file, _ := os.OpenFile(logFile, os.O_RDWR|os.O_CREATE, 0600)
file.Close()
}
LogOutput := &lumberjack.Logger{
Filename: logFile,
MaxSize: _maxsize, //megabytes
MaxBackups: _maxfiles,
MaxAge: _maxage, //days
Compress: _compress, //disabled by default
}
clog.SetOutput(LogOutput)
}
gin.DefaultErrorWriter = clog.WriterLevel(log.ErrorLevel)
gin.DefaultWriter = clog.Writer()
router.Use(gin.LoggerWithFormatter(func(param gin.LogFormatterParams) string {
return fmt.Sprintf("%s - [%s] \"%s %s %s %d %s \"%s\" %s\"\n",
param.ClientIP,
param.TimeStamp.Format(time.RFC1123),
param.Method,
param.Path,
param.Request.Proto,
param.StatusCode,
param.Latency,
param.Request.UserAgent(),
param.ErrorMessage,
)
}))
router.NoRoute(func(c *gin.Context) {
c.JSON(http.StatusNotFound, gin.H{"message": "Page or Method not found"})
})
router.Use(CustomRecoveryWithWriter())
controller := &controllers.Controller{
DBClient: dbClient,
Ectx: context.Background(),
Router: router,
Profiles: config.Profiles,
Log: clog,
ConsoleConfig: config.ConsoleConfig,
}
var apiClient *apic
if config.OnlineClient != nil && config.OnlineClient.Credentials != nil {
log.Printf("Loading CAPI pusher")
apiClient, err = NewAPIC(config.OnlineClient, dbClient, config.ConsoleConfig)
if err != nil {
return &APIServer{}, err
}
controller.CAPIChan = apiClient.alertToPush
} else {
apiClient = nil
controller.CAPIChan = nil
}
if trustedIPs, err := config.GetTrustedIPs(); err == nil {
controller.TrustedIPs = trustedIPs
} else {
return &APIServer{}, err
}
return &APIServer{
URL: config.ListenURI,
TLS: config.TLS,
logFile: logFile,
dbClient: dbClient,
controller: controller,
flushScheduler: flushScheduler,
router: router,
apic: apiClient,
httpServerTomb: tomb.Tomb{},
consoleConfig: config.ConsoleConfig,
}, nil
}
func (s *APIServer) Router() (*gin.Engine, error) {
return s.router, nil
}
func (s *APIServer) GetTLSConfig() (*tls.Config, error) {
var caCert []byte
var err error
var caCertPool *x509.CertPool
var clientAuthType tls.ClientAuthType
if s.TLS == nil {
return &tls.Config{}, nil
}
if s.TLS.ClientVerification == "" {
//sounds like a sane default : verify client cert if given, but don't make it mandatory
clientAuthType = tls.VerifyClientCertIfGiven
} else {
clientAuthType, err = getTLSAuthType(s.TLS.ClientVerification)
if err != nil {
return nil, err
}
}
if s.TLS.CACertPath != "" {
if clientAuthType > tls.RequestClientCert {
log.Infof("(tls) Client Auth Type set to %s", clientAuthType.String())
caCert, err = ioutil.ReadFile(s.TLS.CACertPath)
if err != nil {
return nil, errors.Wrap(err, "Error opening cert file")
}
caCertPool = x509.NewCertPool()
caCertPool.AppendCertsFromPEM(caCert)
}
}
return &tls.Config{
ServerName: s.TLS.ServerName, //should it be removed ?
ClientAuth: clientAuthType,
ClientCAs: caCertPool,
MinVersion: tls.VersionTLS12, // TLS versions below 1.2 are considered insecure - see https://www.rfc-editor.org/rfc/rfc7525.txt for details
}, nil
}
func (s *APIServer) Run() error {
defer types.CatchPanic("lapi/runServer")
tlsCfg, err := s.GetTLSConfig()
if err != nil {
return errors.Wrap(err, "while creating TLS config")
}
s.httpServer = &http.Server{
Addr: s.URL,
Handler: s.router,
TLSConfig: tlsCfg,
}
if s.apic != nil {
s.apic.pushTomb.Go(func() error {
if err := s.apic.Push(); err != nil {
log.Errorf("capi push: %s", err)
return err
}
return nil
})
s.apic.pullTomb.Go(func() error {
if err := s.apic.Pull(); err != nil {
log.Errorf("capi pull: %s", err)
return err
}
return nil
})
s.apic.metricsTomb.Go(func() error {
if err := s.apic.SendMetrics(); err != nil {
log.Errorf("capi metrics: %s", err)
return err
}
return nil
})
}
s.httpServerTomb.Go(func() error {
go func() {
if s.TLS != nil && s.TLS.CertFilePath != "" && s.TLS.KeyFilePath != "" {
if err := s.httpServer.ListenAndServeTLS(s.TLS.CertFilePath, s.TLS.KeyFilePath); err != nil {
log.Fatal(err)
}
} else {
if err := s.httpServer.ListenAndServe(); err != http.ErrServerClosed {
log.Fatal(err)
}
}
}()
<-s.httpServerTomb.Dying()
return nil
})
return nil
}
func (s *APIServer) Close() {
if s.apic != nil {
s.apic.Shutdown() // stop apic first since it use dbClient
}
s.dbClient.Ent.Close()
if s.flushScheduler != nil {
s.flushScheduler.Stop()
}
}
func (s *APIServer) Shutdown() error {
s.Close()
if err := s.httpServer.Shutdown(context.TODO()); err != nil {
return err
}
//close io.writer logger given to gin
if pipe, ok := gin.DefaultErrorWriter.(*io.PipeWriter); ok {
pipe.Close()
}
if pipe, ok := gin.DefaultWriter.(*io.PipeWriter); ok {
pipe.Close()
}
s.httpServerTomb.Kill(nil)
if err := s.httpServerTomb.Wait(); err != nil {
return errors.Wrap(err, "while waiting on httpServerTomb")
}
return nil
}
func (s *APIServer) AttachPluginBroker(broker *csplugin.PluginBroker) {
s.controller.PluginChannel = broker.PluginChannel
}
func (s *APIServer) InitController() error {
err := s.controller.Init()
if err != nil {
return errors.Wrap(err, "controller init")
}
if s.TLS != nil {
var cacheExpiration time.Duration
if s.TLS.CacheExpiration != nil {
cacheExpiration = *s.TLS.CacheExpiration
} else {
cacheExpiration = time.Hour
}
s.controller.HandlerV1.Middlewares.JWT.TlsAuth, err = v1.NewTLSAuth(s.TLS.AllowedAgentsOU, s.TLS.CRLPath,
cacheExpiration,
log.WithFields(log.Fields{
"component": "tls-auth",
"type": "agent",
}))
if err != nil {
return errors.Wrap(err, "while creating TLS auth for agents")
}
s.controller.HandlerV1.Middlewares.APIKey.TlsAuth, err = v1.NewTLSAuth(s.TLS.AllowedBouncersOU, s.TLS.CRLPath,
cacheExpiration,
log.WithFields(log.Fields{
"component": "tls-auth",
"type": "bouncer",
}))
if err != nil {
return errors.Wrap(err, "while creating TLS auth for bouncers")
}
}
return err
}