From a41f22782b588ae4b250974ab2f5ed079f56ac5b Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Mon, 11 May 2020 15:05:03 +0300
Subject: [PATCH] container: implement SignedDataSource on GetRequest message

---
 container/sign.go       | 31 +++++++++++++++++++++++++++++++
 container/sign_test.go  | 15 +++++++++++++++
 container/types.go      | 10 ++++++++++
 container/types_test.go | 11 +++++++++++
 4 files changed, 67 insertions(+)

diff --git a/container/sign.go b/container/sign.go
index d9405b82..89c4a4c6 100644
--- a/container/sign.go
+++ b/container/sign.go
@@ -95,3 +95,34 @@ func (m DeleteRequest) ReadSignedData(p []byte) (int, error) {
 
 	return off, nil
 }
+
+// SignedData returns payload bytes of the request.
+func (m GetRequest) SignedData() ([]byte, error) {
+	data := make([]byte, m.SignedDataSize())
+
+	if _, err := m.ReadSignedData(data); err != nil {
+		return nil, err
+	}
+
+	return data, nil
+}
+
+// SignedDataSize returns payload size of the request.
+func (m GetRequest) SignedDataSize() (sz int) {
+	return m.GetCID().Size()
+}
+
+// ReadSignedData copies payload bytes to passed buffer.
+//
+// If the Request size is insufficient, io.ErrUnexpectedEOF returns.
+func (m GetRequest) ReadSignedData(p []byte) (int, error) {
+	if len(p) < m.SignedDataSize() {
+		return 0, io.ErrUnexpectedEOF
+	}
+
+	var off int
+
+	off += copy(p[off:], m.GetCID().Bytes())
+
+	return off, nil
+}
diff --git a/container/sign_test.go b/container/sign_test.go
index caa3516f..fb11fab8 100644
--- a/container/sign_test.go
+++ b/container/sign_test.go
@@ -74,6 +74,21 @@ func TestRequestSign(t *testing.T) {
 					cid := req.GetCID()
 					cid[0]++
 
+					req.SetCID(cid)
+				},
+			},
+		},
+		{ // GetRequest
+			constructor: func() sigType {
+				return new(GetRequest)
+			},
+			payloadCorrupt: []func(sigType){
+				func(s sigType) {
+					req := s.(*GetRequest)
+
+					cid := req.GetCID()
+					cid[0]++
+
 					req.SetCID(cid)
 				},
 			},
diff --git a/container/types.go b/container/types.go
index eeabe354..b34c51b6 100644
--- a/container/types.go
+++ b/container/types.go
@@ -138,3 +138,13 @@ func (m DeleteRequest) GetCID() CID {
 func (m *DeleteRequest) SetCID(cid CID) {
 	m.CID = cid
 }
+
+// GetCID is a CID field getter.
+func (m GetRequest) GetCID() CID {
+	return m.CID
+}
+
+// SetCID is a CID field setter.
+func (m *GetRequest) SetCID(cid CID) {
+	m.CID = cid
+}
diff --git a/container/types_test.go b/container/types_test.go
index c1dafcca..3c120723 100644
--- a/container/types_test.go
+++ b/container/types_test.go
@@ -118,3 +118,14 @@ func TestDeleteRequestGettersSetters(t *testing.T) {
 		require.Equal(t, cid, m.GetCID())
 	})
 }
+
+func TestGetRequestGettersSetters(t *testing.T) {
+	t.Run("cid", func(t *testing.T) {
+		cid := CID{1, 2, 3}
+		m := new(GetRequest)
+
+		m.SetCID(cid)
+
+		require.Equal(t, cid, m.GetCID())
+	})
+}