From 76b447b44c4f66c2efa9a46cc1663c668f7a0f66 Mon Sep 17 00:00:00 2001
From: Eric Lippmann <eric.lippmann@icinga.com>
Date: Wed, 23 Feb 2022 17:44:54 +0100
Subject: [PATCH] Remove null bytes from strings

PostgreSQL does not allow null bytes in varchar, char and
text fields.
---
 pkg/types/string.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/pkg/types/string.go b/pkg/types/string.go
index a3e2174d9..f8ead450c 100644
--- a/pkg/types/string.go
+++ b/pkg/types/string.go
@@ -7,6 +7,7 @@ import (
 	"encoding"
 	"encoding/json"
 	"github.com/icinga/icingadb/internal"
+	"strings"
 )
 
 // String adds JSON support to sql.NullString.
@@ -52,6 +53,17 @@ func (s *String) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
+// Value implements the driver.Valuer interface.
+// Supports SQL NULL.
+func (s String) Value() (driver.Value, error) {
+	if !s.Valid {
+		return nil, nil
+	}
+
+	// PostgreSQL does not allow null bytes in varchar, char and text fields.
+	return strings.ReplaceAll(s.String, "\x00", ""), nil
+}
+
 // Assert interface compliance.
 var (
 	_ json.Marshaler           = String{}