vendor files

vendor/k8s.io/kubernetes/pkg/bootstrap/api/helpers.go

@@ -0,0 +1,52 @@
+/*
+Copyright 2017 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 api
+
+import (
+	"fmt"
+	"k8s.io/apimachinery/pkg/util/sets"
+	"regexp"
+	"strings"
+)
+
+var bootstrapGroupRegexp = regexp.MustCompile(`\A` + BootstrapGroupPattern + `\z`)
+
+// ValidateBootstrapGroupName checks if the provided group name is a valid
+// bootstrap group name. Returns nil if valid or a validation error if invalid.
+// TODO(mattmoyer): this validation should migrate out to client-go (see https://github.com/kubernetes/client-go/issues/114)
+func ValidateBootstrapGroupName(name string) error {
+	if bootstrapGroupRegexp.Match([]byte(name)) {
+		return nil
+	}
+	return fmt.Errorf("bootstrap group %q is invalid (must match %s)", name, BootstrapGroupPattern)
+}
+
+// ValidateUsages validates that the passed in string are valid usage strings for bootstrap tokens.
+func ValidateUsages(usages []string) error {
+	usageAuthentication := strings.TrimPrefix(BootstrapTokenUsageAuthentication, BootstrapTokenUsagePrefix)
+	usageSigning := strings.TrimPrefix(BootstrapTokenUsageSigningKey, BootstrapTokenUsagePrefix)
+	invalidUsages := sets.NewString()
+	for _, usage := range usages {
+		if usage != usageAuthentication && usage != usageSigning {
+			invalidUsages.Insert(usage)
+		}
+	}
+	if len(invalidUsages) > 0 {
+		return fmt.Errorf("invalide bootstrap token usage string: %s, valid usage option: %s, %s", strings.Join(invalidUsages.List(), ","), usageAuthentication, usageSigning)
+	}
+	return nil
+}