Initial distributor implementation

common/api/dm/service/v1/activate_execution_normalize.go

+// Copyright 2016 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package dm
+
+import "fmt"
+
+// MinimumActivationTokenLength is the minimum number of bytes in an appropriate
+// ExecutionToken.
+const MinimumActivationTokenLength = 32
+
+// Normalize returns an error iff the ActivateExecutionReq has bad form (nils,
+// insufficient activation token length, etc.
+func (a *ActivateExecutionReq) Normalize() error {
+        if err := a.Auth.Normalize(); err != nil {
+                return err
+        }
+        if len(a.ExecutionToken) < MinimumActivationTokenLength {
+                return fmt.Errorf("insufficiently long ExecutionToken: %d",
+                        len(a.ExecutionToken))
+        }
+        return nil
+}