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Make webhook secret configurable

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Signed-off-by: Knut Ahlers <knut@ahlers.me>
This commit is contained in:
Knut Ahlers 2021-05-04 18:39:58 +02:00
parent e4800c921f
commit fb116bb29a
Signed by: luzifer
GPG key ID: 0066F03ED215AD7D
2 changed files with 8 additions and 4 deletions
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6
main.go
View file

@ -28,11 +28,11 @@ var (
TwitchToken string `flag:"twitch-token" default:"" description:"OAuth token valid for client"` TwitchToken string `flag:"twitch-token" default:"" description:"OAuth token valid for client"`
UpdateFromAPIInterval time.Duration `flag:"update-from-api-interval" default:"10m" description:"How often to ask the API for real values"` UpdateFromAPIInterval time.Duration `flag:"update-from-api-interval" default:"10m" description:"How often to ask the API for real values"`
VersionAndExit bool `flag:"version" default:"false" description:"Prints current version and exits"` VersionAndExit bool `flag:"version" default:"false" description:"Prints current version and exits"`
WebHookSecret string `flag:"webhook-secret" default:"" description:"Secret to use for HMAC hashing of webhook payload"`
WebHookTimeout time.Duration `flag:"webhook-timeout" default:"15m" description:"When to re-register the webhooks"` WebHookTimeout time.Duration `flag:"webhook-timeout" default:"15m" description:"When to re-register the webhooks"`
}{} }{}
store *storage store *storage
webhookSecret = uuid.Must(uuid.NewV4()).String()
version = "dev" version = "dev"
) )
@ -53,6 +53,10 @@ func init() {
} else { } else {
log.SetLevel(l) log.SetLevel(l)
} }
if cfg.WebHookSecret == "" {
cfg.WebHookSecret = uuid.Must(uuid.NewV4()).String()
}
} }
func main() { func main() {

4
webhook.go
View file

@ -54,7 +54,7 @@ func handleWebHookPush(w http.ResponseWriter, r *http.Request) {
return return
} }
mac := hmac.New(sha256.New, []byte(webhookSecret)) mac := hmac.New(sha256.New, []byte(cfg.WebHookSecret))
mac.Write(body.Bytes()) mac.Write(body.Bytes())
if cSig := fmt.Sprintf("sha256=%x", mac.Sum(nil)); cSig != signature { if cSig := fmt.Sprintf("sha256=%x", mac.Sum(nil)); cSig != signature {
log.Errorf("Got message signature %s, expected %s", signature, cSig) log.Errorf("Got message signature %s, expected %s", signature, cSig)
@ -173,7 +173,7 @@ func registerWebHooks() error {
"hub.mode": "subscribe", "hub.mode": "subscribe",
"hub.topic": topic, "hub.topic": topic,
"hub.lease_seconds": int64((cfg.WebHookTimeout + twitchRequestTimeout) / time.Second), "hub.lease_seconds": int64((cfg.WebHookTimeout + twitchRequestTimeout) / time.Second),
"hub.secret": webhookSecret, "hub.secret": cfg.WebHookSecret,
}); err != nil { }); err != nil {
return errors.Wrap(err, "assemble subscribe payload") return errors.Wrap(err, "assemble subscribe payload")
} }