[#1437] neofs-cli: Move util command to a separate package

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

cmd/neofs-cli/modules/util/sign_bearer.go

@@ -0,0 +1,63 @@
+package util
+
+import (
+	"os"
+
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
+	"github.com/spf13/cobra"
+)
+
+const (
+	signBearerJSONFlag = "json"
+)
+
+var signBearerCmd = &cobra.Command{
+	Use:   "bearer-token",
+	Short: "Sign bearer token to use it in requests",
+	Run:   signBearerToken,
+}
+
+func initSignBearerCmd() {
+	commonflags.InitWithoutRPC(signBearerCmd)
+
+	flags := signBearerCmd.Flags()
+
+	flags.String(signFromFlag, "", "File with JSON or binary encoded bearer token to sign")
+	_ = signBearerCmd.MarkFlagFilename(signFromFlag)
+	_ = signBearerCmd.MarkFlagRequired(signFromFlag)
+
+	flags.String(signToFlag, "", "File to dump signed bearer token (default: binary encoded)")
+	flags.Bool(signBearerJSONFlag, false, "Dump bearer token in JSON encoding")
+}
+
+func signBearerToken(cmd *cobra.Command, _ []string) {
+	btok := common.ReadBearerToken(cmd, signFromFlag)
+	pk := key.GetOrGenerate(cmd)
+
+	err := btok.Sign(*pk)
+	common.ExitOnErr(cmd, "", err)
+
+	to := cmd.Flag(signToFlag).Value.String()
+	jsonFlag, _ := cmd.Flags().GetBool(signBearerJSONFlag)
+
+	var data []byte
+	if jsonFlag || len(to) == 0 {
+		data, err = btok.MarshalJSON()
+		common.ExitOnErr(cmd, "can't JSON encode bearer token: %w", err)
+	} else {
+		data = btok.Marshal()
+	}
+
+	if len(to) == 0 {
+		prettyPrintJSON(cmd, data)
+
+		return
+	}
+
+	err = os.WriteFile(to, data, 0644)
+	common.ExitOnErr(cmd, "can't write signed bearer token to file: %w", err)
+
+	cmd.Printf("signed bearer token was successfully dumped to %s\n", to)
+}