[#168] acl: Implement binary/JSON encoders/decoders on Target

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/acl/eacl/target.go

@@ -14,10 +14,18 @@ type Target struct {
 	keys []ecdsa.PublicKey
 }
 
+func (t *Target) SetKeys(keys ...ecdsa.PublicKey) {
+	t.keys = keys
+}
+
 func (t Target) Keys() []ecdsa.PublicKey {
 	return t.keys
 }
 
+func (t *Target) SetRole(r Role) {
+	t.role = r
+}
+
 func (t Target) Role() Role {
 	return t.role
 }
@@ -37,6 +45,10 @@ func (t *Target) ToV2() *v2acl.Target {
 	return target
 }
 
+func NewTarget() *Target {
+	return NewTargetFromV2(new(v2acl.Target))
+}
+
 func NewTargetFromV2(target *v2acl.Target) *Target {
 	t := new(Target)
 
@@ -54,3 +66,47 @@ func NewTargetFromV2(target *v2acl.Target) *Target {
 
 	return t
 }
+
+// Marshal marshals Target into a protobuf binary form.
+//
+// Buffer is allocated when the argument is empty.
+// Otherwise, the first buffer is used.
+func (t *Target) Marshal(b ...[]byte) ([]byte, error) {
+	var buf []byte
+	if len(b) > 0 {
+		buf = b[0]
+	}
+
+	return t.ToV2().
+		StableMarshal(buf)
+}
+
+// Unmarshal unmarshals protobuf binary representation of Target.
+func (t *Target) Unmarshal(data []byte) error {
+	fV2 := new(v2acl.Target)
+	if err := fV2.Unmarshal(data); err != nil {
+		return err
+	}
+
+	*t = *NewTargetFromV2(fV2)
+
+	return nil
+}
+
+// MarshalJSON encodes Target to protobuf JSON format.
+func (t *Target) MarshalJSON() ([]byte, error) {
+	return t.ToV2().
+		MarshalJSON()
+}
+
+// UnmarshalJSON decodes Target from protobuf JSON format.
+func (t *Target) UnmarshalJSON(data []byte) error {
+	tV2 := new(v2acl.Target)
+	if err := tV2.UnmarshalJSON(data); err != nil {
+		return err
+	}
+
+	*t = *NewTargetFromV2(tV2)
+
+	return nil
+}

pkg/acl/eacl/target_test.go

@@ -36,3 +36,29 @@ func TestTarget(t *testing.T) {
 		require.Equal(t, new(Target), NewTargetFromV2(nil))
 	})
 }
+
+func TestTargetEncoding(t *testing.T) {
+	tar := NewTarget()
+	tar.SetRole(RoleSystem)
+	tar.SetKeys(test.DecodeKey(-1).PublicKey)
+
+	t.Run("binary", func(t *testing.T) {
+		data, err := tar.Marshal()
+		require.NoError(t, err)
+
+		tar2 := NewTarget()
+		require.NoError(t, tar2.Unmarshal(data))
+
+		require.Equal(t, tar, tar2)
+	})
+
+	t.Run("json", func(t *testing.T) {
+		data, err := tar.MarshalJSON()
+		require.NoError(t, err)
+
+		tar2 := NewTarget()
+		require.NoError(t, tar2.UnmarshalJSON(data))
+
+		require.Equal(t, tar, tar2)
+	})
+}

v2/acl/json.go

@@ -102,3 +102,23 @@ func (f *HeaderFilter) UnmarshalJSON(data []byte) error {
 
 	return nil
 }
+
+func (t *Target) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		EmitUnpopulated: true,
+	}.Marshal(
+		TargetToGRPCMessage(t),
+	)
+}
+
+func (t *Target) UnmarshalJSON(data []byte) error {
+	msg := new(acl.EACLRecord_Target)
+
+	if err := protojson.Unmarshal(data, msg); err != nil {
+		return err
+	}
+
+	*t = *TargetInfoFromGRPCMessage(msg)
+
+	return nil
+}

v2/acl/json_test.go

@@ -76,3 +76,15 @@ func TestFilterJSON(t *testing.T) {
 
 	require.Equal(t, f, f2)
 }
+
+func TestTargetJSON(t *testing.T) {
+	tar := generateTarget(acl.RoleSystem, 3)
+
+	data, err := tar.MarshalJSON()
+	require.NoError(t, err)
+
+	tar2 := new(acl.Target)
+	require.NoError(t, tar2.UnmarshalJSON(data))
+
+	require.Equal(t, tar, tar2)
+}

v2/acl/marshal.go

@@ -278,6 +278,17 @@ func (t *Target) StableSize() (size int) {
 	return size
 }
 
+func (t *Target) Unmarshal(data []byte) error {
+	m := new(acl.EACLRecord_Target)
+	if err := proto.Unmarshal(data, m); err != nil {
+		return err
+	}
+
+	*t = *TargetInfoFromGRPCMessage(m)
+
+	return nil
+}
+
 func (l *TokenLifetime) StableMarshal(buf []byte) ([]byte, error) {
 	if l == nil {
 		return []byte{}, nil

v2/acl/marshal_test.go

@@ -136,7 +136,6 @@ func TestHeaderFilter_StableMarshal(t *testing.T) {
 
 func TestTargetInfo_StableMarshal(t *testing.T) {
 	targetFrom := generateTarget(acl.RoleUser, 2)
-	transport := new(grpc.EACLRecord_Target)
 
 	t.Run("non empty", func(t *testing.T) {
 		targetFrom.SetRole(acl.RoleUser)
@@ -148,10 +147,9 @@ func TestTargetInfo_StableMarshal(t *testing.T) {
 		wire, err := targetFrom.StableMarshal(nil)
 		require.NoError(t, err)
 
-		err = goproto.Unmarshal(wire, transport)
-		require.NoError(t, err)
+		targetTo := new(acl.Target)
+		require.NoError(t, targetTo.Unmarshal(wire))
 
-		targetTo := acl.TargetInfoFromGRPCMessage(transport)
 		require.Equal(t, targetFrom, targetTo)
 	})
 }