added cephfs/credentials

pkg/cephfs/credentials.go

@@ -0,0 +1,56 @@
+/*
+Copyright 2018 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 cephfs
+
+import "fmt"
+
+const (
+	credUserId   = "userID"
+	credUserKey  = "userKey"
+	credAdminId  = "adminID"
+	credAdminKey = "adminKey"
+)
+
+type credentials struct {
+	id  string
+	key string
+}
+
+func getCredentials(idField, keyField string, secrets map[string]string) (*credentials, error) {
+	var (
+		c  = &credentials{}
+		ok bool
+	)
+
+	if c.id, ok = secrets[idField]; !ok {
+		return nil, fmt.Errorf("missing ID field '%s' in secrets", idField)
+	}
+
+	if c.key, ok = secrets[keyField]; !ok {
+		return nil, fmt.Errorf("missing key field '%s' in secrets", keyField)
+	}
+
+	return c, nil
+}
+
+func getUserCredentials(secrets map[string]string) (*credentials, error) {
+	return getCredentials(credUserId, credUserKey, secrets)
+}
+
+func getAdminCredentials(secrets map[string]string) (*credentials, error) {
+	return getCredentials(credAdminId, credAdminKey, secrets)
+}