change json encoder

sign.go

@@ -6,7 +6,6 @@ import (
 	"crypto/rand"
 	"encoding/base64"
 	"encoding/hex"
-	"encoding/json"
 	"errors"
 	"github.com/ugorji/go/codec"
 	"hash/crc64"
@@ -60,10 +59,14 @@ func Format(token string) (txt string, err error) {
 	}
 
 	buf := bytes.NewBuffer(nil)
-	var handle codec.CborHandle
+	var cHandle codec.CborHandle
+	var jHandle codec.JsonHandle
+	jHandle.HTMLCharsAsIs = true
+	jHandle.MapKeyAsString = true
+	jHandle.Indent = 4
 
 	buf.Write(data)
-	dec := codec.NewDecoder(buf, &handle)
+	dec := codec.NewDecoder(buf, &cHandle)
 
 	var td tokenData
 	err = dec.Decode(&td)
@@ -79,9 +82,7 @@ func Format(token string) (txt string, err error) {
 	buf.Reset()
 	buf.Write([]byte("SIGNATURE=" + hex.EncodeToString(td.Signature) + "\n"))
 
-	enc := json.NewEncoder(buf)
-	enc.SetEscapeHTML(false)
-	enc.SetIndent("", "\t")
+	enc := codec.NewEncoder(buf, &jHandle)
 	err = enc.Encode(payload)
 	txt = buf.String()
 	return