vendor: revendor

vendor/k8s.io/component-base/logs/sanitization/sanitization.go

@@ -0,0 +1,69 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package sanitization
+
+import (
+	"fmt"
+
+	"k8s.io/component-base/logs/datapol"
+)
+
+const (
+	datapolMsgFmt = "Log message has been redacted. Log argument #%d contains: %v"
+	datapolMsg    = "Log message has been redacted."
+)
+
+// SanitizingFilter implements the LogFilter interface from klog with a set of functions that inspects the arguments with the datapol library
+type SanitizingFilter struct{}
+
+// Filter is the filter function for the non-formatting logging functions of klog.
+func (sf *SanitizingFilter) Filter(args []interface{}) []interface{} {
+	for i, v := range args {
+		types := datapol.Verify(v)
+		if len(types) > 0 {
+			return []interface{}{fmt.Sprintf(datapolMsgFmt, i, types)}
+		}
+	}
+	return args
+}
+
+// FilterF is the filter function for the formatting logging functions of klog
+func (sf *SanitizingFilter) FilterF(fmt string, args []interface{}) (string, []interface{}) {
+	for i, v := range args {
+		types := datapol.Verify(v)
+		if len(types) > 0 {
+			return datapolMsgFmt, []interface{}{i, types}
+		}
+	}
+	return fmt, args
+
+}
+
+// FilterS is the filter for the structured logging functions of klog.
+func (sf *SanitizingFilter) FilterS(msg string, keysAndValues []interface{}) (string, []interface{}) {
+	for i, v := range keysAndValues {
+		types := datapol.Verify(v)
+		if len(types) > 0 {
+			if i%2 == 0 {
+				return datapolMsg, []interface{}{"key_index", i, "types", types}
+			}
+			// since we scanned linearly we can safely log the key.
+			return datapolMsg, []interface{}{"key", keysAndValues[i-1], "types", types}
+		}
+	}
+	return msg, keysAndValues
+}