Add default canned policies (#6690)

pkg/iam/policy/constants.go

@@ -0,0 +1,60 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * 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 iampolicy
+
+import (
+	"github.com/minio/minio/pkg/policy"
+)
+
+// ReadWrite - provides full access to all buckets and all objects
+var ReadWrite = Policy{
+	Version: DefaultVersion,
+	Statements: []Statement{
+		{
+			SID:       policy.ID(""),
+			Effect:    policy.Allow,
+			Actions:   NewActionSet(AllActions),
+			Resources: NewResourceSet(NewResource("*", "")),
+		},
+	},
+}
+
+// ReadOnly - read only.
+var ReadOnly = Policy{
+	Version: DefaultVersion,
+	Statements: []Statement{
+		{
+			SID:       policy.ID(""),
+			Effect:    policy.Allow,
+			Actions:   NewActionSet(GetBucketLocationAction, GetObjectAction),
+			Resources: NewResourceSet(NewResource("*", "")),
+		},
+	},
+}
+
+// WriteOnly - provides write access.
+var WriteOnly = Policy{
+	Version: DefaultVersion,
+	Statements: []Statement{
+		{
+			SID:       policy.ID(""),
+			Effect:    policy.Allow,
+			Actions:   NewActionSet(PutObjectAction),
+			Resources: NewResourceSet(NewResource("*", "")),
+		},
+	},
+}