config/supermicro: Enforce ISO-8859-1/UTF-8 XML decoding

config/supermicro.go

@@ -1,8 +1,11 @@
 package config
 
 import (
+	"bytes"
 	"encoding/xml"
 	"strings"
+
+	"golang.org/x/net/html/charset"
 )
 
 const (
@@ -122,7 +125,16 @@ func (cm *supermicroVendorConfig) Marshal() (string, error) {
 }
 
 func (cm *supermicroVendorConfig) Unmarshal(cfgData string) (err error) {
-	err = xml.Unmarshal([]byte(cfgData), cm.ConfigData)
+	// the xml exported by sum is ISO-8859-1 encoded
+	decoder := xml.NewDecoder(bytes.NewReader([]byte(cfgData)))
+	// convert characters from non-UTF-8 to UTF-8
+	decoder.CharsetReader = charset.NewReaderLabel
+
+	err = decoder.Decode(cm.ConfigData)
+	if err != nil {
+		return err
+	}
+
 	return
 }