feat: add easy way to generate keypairs from the cli

cmd/client/client.go

@@ -27,9 +27,10 @@ var (
 		"/etc/dyndns/client.json",
 		"~/.dyndns/config.json",
 	}
-	configPath string
-	once       bool
-	cmdVersion bool
+	configPath    string
+	once          bool
+	cmdVersion    bool
+	cmdGenKeypair bool
 )
 
 func main() {
@@ -40,6 +41,10 @@ func main() {
 		os.Exit(0)
 	}
 
+	if cmdGenKeypair {
+		generateKeypair()
+	}
+
 	util.InitLogging()
 	if configPath == "" {
 		configPath = getDefaultConfigFileOrEmpty()
@@ -192,3 +197,17 @@ func getKeypair(path string) verification.SignatureKeypair {
 
 	return keypair
 }
+
+func generateKeypair() {
+	keypair, err := verification.NewKeyPair()
+	if err != nil {
+		log.Fatal().Msgf("Can not create keypair: %v", err)
+	}
+
+	jsonEncoded, err := keypair.AsJson()
+	if err != nil {
+		log.Fatal().Err(err).Msg("could not marshall keypair")
+	}
+	fmt.Printf("%s\n", jsonEncoded)
+	os.Exit(0)
+}