go: discord/modules: Do better hashing while obfuscating

GoBot/discord/modules/admin.go

@@ -63,7 +63,7 @@ var viewTrustLevel = adminOnly(func(s *discordgo.Session, m *discordgo.MessageCr
 			).Send(s, m.ChannelID)
 			return
 		}
-		value, err := backend.GetTrust(s, command[1])
+		value, err := backend.GetTrust(s, user.User.ID)
 		if err != nil {
 			message.AuditError(s, m.ChannelID, err)
 			return
@@ -97,6 +97,8 @@ var viewTrustLevel = adminOnly(func(s *discordgo.Session, m *discordgo.MessageCr
 	rand.Read(salt)
 
 	//Generate message
+	hash := sha512.New()
+	hash.Write(salt)
 	msg := message.NewEmbed().SetColour(config.VTLColour).SetTitle(config.VTLGlobalTitle)
 	for _, v := range members {
 		value, err := backend.GetTrust(s, v.User.ID)
@@ -111,9 +113,8 @@ var viewTrustLevel = adminOnly(func(s *discordgo.Session, m *discordgo.MessageCr
 		if len(command) > 1 {
 			username = v.User.Username + "#" + v.User.Discriminator
 		} else {
-			saltedUsername := []byte(v.User.Username + "#" + v.User.Discriminator)
-			saltedUsername = append(saltedUsername, salt...)
-			username = hex.EncodeToString(sha512.New().Sum(saltedUsername))[:64]
+			toSalt := []byte(v.User.Username + "#" + v.User.Discriminator)
+			username = hex.EncodeToString(hash.Sum(toSalt))[:64]
 			if username == "" {
 				username = "<cannot calculate hash>"
 			}