Fix issue with Sign/VerifyRequestHeader proto.Clone

proto.Clone couldn't makes copy for custom fields.
We should reset and restore MetaHeader before/after Sign/Verify.
Add test coverage to check that all works like expected.

service/meta.go

@@ -8,10 +8,11 @@ import (
 
 type (
 	// MetaHeader contains meta information of request.
-	// It provides methods to get or set meta information
+	// It provides methods to get or set meta information meta header.
-	// and reset meta header.
+	// Also contains methods to reset and restore meta header.
 	MetaHeader interface {
-		ResetMeta()
+		ResetMeta() RequestMetaHeader
+		RestoreMeta(RequestMetaHeader)
 
 		// TTLRequest to verify and update ttl requests.
 		GetTTL() uint32
@@ -22,7 +23,7 @@ type (
 		SetEpoch(v uint64)
 	}
 
-	// TTLCondition is closure, that allows to validate request with ttl
+	// TTLCondition is closure, that allows to validate request with ttl.
 	TTLCondition func(ttl uint32) error
 )
 
@@ -45,14 +46,21 @@ const (
 	ErrIncorrectTTL = internal.Error("incorrect ttl")
 )
 
-// SetTTL sets TTL to RequestMetaHeader
+// SetTTL sets TTL to RequestMetaHeader.
 func (m *RequestMetaHeader) SetTTL(v uint32) { m.TTL = v }
 
-// SetEpoch sets Epoch to RequestMetaHeader
+// SetEpoch sets Epoch to RequestMetaHeader.
 func (m *RequestMetaHeader) SetEpoch(v uint64) { m.Epoch = v }
 
-// ResetMeta sets RequestMetaHeader to empty value
+// ResetMeta returns current value and sets RequestMetaHeader to empty value.
-func (m *RequestMetaHeader) ResetMeta() { m.Reset() }
+func (m *RequestMetaHeader) ResetMeta() RequestMetaHeader {
+	cp := *m
+	m.Reset()
+	return cp
+}
+
+// RestoreMeta sets current RequestMetaHeader to passed value.
+func (m *RequestMetaHeader) RestoreMeta(v RequestMetaHeader) { *m = v }
 
 // IRNonForwarding condition that allows NonForwardingTTL only for IR
 func IRNonForwarding(role NodeRole) TTLCondition {

service/verify.go

@@ -10,7 +10,7 @@ import (
 )
 
 type (
-	// VerifiableRequest adds possibility to sign and verify request header
+	// VerifiableRequest adds possibility to sign and verify request header.
 	VerifiableRequest interface {
 		proto.Message
 		Marshal() ([]byte, error)
@@ -30,19 +30,19 @@ type (
 )
 
 const (
-	// ErrCannotLoadPublicKey is raised when cannot unmarshal public key from RequestVerificationHeader_Sign
+	// ErrCannotLoadPublicKey is raised when cannot unmarshal public key from RequestVerificationHeader_Sign.
 	ErrCannotLoadPublicKey = internal.Error("cannot load public key")
 
-	// ErrCannotFindOwner is raised when signatures empty in GetOwner
+	// ErrCannotFindOwner is raised when signatures empty in GetOwner.
 	ErrCannotFindOwner = internal.Error("cannot find owner public key")
 )
 
-// SetSignatures replaces signatures stored in RequestVerificationHeader
+// SetSignatures replaces signatures stored in RequestVerificationHeader.
 func (m *RequestVerificationHeader) SetSignatures(signatures []*RequestVerificationHeader_Signature) {
 	m.Signatures = signatures
 }
 
-// AddSignature adds new Signature into RequestVerificationHeader
+// AddSignature adds new Signature into RequestVerificationHeader.
 func (m *RequestVerificationHeader) AddSignature(sig *RequestVerificationHeader_Signature) {
 	if sig == nil {
 		return
@@ -123,12 +123,14 @@ func newSignature(key *ecdsa.PrivateKey, data []byte) (*RequestVerificationHeade
 // SignRequestHeader receives private key and request with RequestVerificationHeader,
 // tries to marshal and sign request with passed PrivateKey, after that adds
 // new signature to headers. If something went wrong, returns error.
-func SignRequestHeader(key *ecdsa.PrivateKey, req VerifiableRequest) error {
+func SignRequestHeader(key *ecdsa.PrivateKey, msg VerifiableRequest) error {
-	msg := proto.Clone(req).(VerifiableRequest)
-
 	// ignore meta header
 	if meta, ok := msg.(MetaHeader); ok {
-		meta.ResetMeta()
+		h := meta.ResetMeta()
+
+		defer func() {
+			meta.RestoreMeta(h)
+		}()
 	}
 
 	data, err := msg.Marshal()
@@ -141,22 +143,28 @@ func SignRequestHeader(key *ecdsa.PrivateKey, req VerifiableRequest) error {
 		return err
 	}
 
-	req.AddSignature(signature)
+	msg.AddSignature(signature)
 
 	return nil
 }
 
 // VerifyRequestHeader receives request with RequestVerificationHeader,
-// tries to marshal and verify each signature from request
+// tries to marshal and verify each signature from request.
 // If something went wrong, returns error.
-func VerifyRequestHeader(req VerifiableRequest) error {
+func VerifyRequestHeader(msg VerifiableRequest) error {
-	msg := proto.Clone(req).(VerifiableRequest)
 	// ignore meta header
 	if meta, ok := msg.(MetaHeader); ok {
-		meta.ResetMeta()
+		h := meta.ResetMeta()
+
+		defer func() {
+			meta.RestoreMeta(h)
+		}()
 	}
 
 	signatures := msg.GetSignatures()
+	defer func() {
+		msg.SetSignatures(signatures)
+	}()
 
 	for i := range signatures {
 		msg.SetSignatures(signatures[:i])
@@ -177,3 +185,35 @@ func VerifyRequestHeader(req VerifiableRequest) error {
 
 	return nil
 }
+
+// testCustomField for test usage only.
+type testCustomField [8]uint32
+
+var _ internal.Custom = (*testCustomField)(nil)
+
+// Reset skip, it's for test usage only.
+func (t testCustomField) Reset() {}
+
+// ProtoMessage skip, it's for test usage only.
+func (t testCustomField) ProtoMessage() {}
+
+// Size skip, it's for test usage only.
+func (t testCustomField) Size() int { return 32 }
+
+// String skip, it's for test usage only.
+func (t testCustomField) String() string { return "" }
+
+// Bytes skip, it's for test usage only.
+func (t testCustomField) Bytes() []byte { return nil }
+
+// Unmarshal skip, it's for test usage only.
+func (t testCustomField) Unmarshal(data []byte) error { return nil }
+
+// Empty skip, it's for test usage only.
+func (t testCustomField) Empty() bool { return false }
+
+// UnmarshalTo skip, it's for test usage only.
+func (t testCustomField) MarshalTo(data []byte) (int, error) { return 0, nil }
+
+// Marshal skip, it's for test usage only.
+func (t testCustomField) Marshal() ([]byte, error) { return nil, nil }

service/verify_test.go

@@ -1,9 +1,12 @@
 package service
 
 import (
+	"bytes"
+	"log"
 	"math"
 	"testing"
 
+	"github.com/gogo/protobuf/proto"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/nspcc-dev/neofs-crypto/test"
 	"github.com/pkg/errors"
@@ -104,3 +107,37 @@ func TestMaintainableRequest(t *testing.T) {
 		require.EqualError(t, errors.Cause(err), crypto.ErrInvalidSignature.Error())
 	}
 }
+
+func TestVerifyAndSignRequestHeaderWithoutCloning(t *testing.T) {
+	key := test.DecodeKey(0)
+
+	custom := testCustomField{1, 2, 3, 4, 5, 6, 7, 8}
+
+	b := &TestRequest{
+		IntField:    math.MaxInt32,
+		StringField: "TestRequestStringField",
+		BytesField:  []byte("TestRequestBytesField"),
+		CustomField: &custom,
+		RequestMetaHeader: RequestMetaHeader{
+			TTL:   math.MaxInt32 - 8,
+			Epoch: math.MaxInt64 - 12,
+		},
+	}
+
+	require.NoError(t, SignRequestHeader(key, b))
+	require.NoError(t, VerifyRequestHeader(b))
+
+	require.Len(t, b.Signatures, 1)
+	require.Equal(t, custom, *b.CustomField)
+	require.Equal(t, uint32(math.MaxInt32-8), b.GetTTL())
+	require.Equal(t, uint64(math.MaxInt64-12), b.GetEpoch())
+
+	buf := bytes.NewBuffer(nil)
+	log.SetOutput(buf)
+
+	cp, ok := proto.Clone(b).(*TestRequest)
+	require.True(t, ok)
+	require.NotEqual(t, b, cp)
+
+	require.Contains(t, buf.String(), "proto: don't know how to copy")
+}

service/verify_test.pb.go

@@ -27,6 +27,7 @@ type TestRequest struct {
 	IntField                  int32            `protobuf:"varint,1,opt,name=IntField,proto3" json:"IntField,omitempty"`
 	StringField               string           `protobuf:"bytes,2,opt,name=StringField,proto3" json:"StringField,omitempty"`
 	BytesField                []byte           `protobuf:"bytes,3,opt,name=BytesField,proto3" json:"BytesField,omitempty"`
+	CustomField               *testCustomField `protobuf:"bytes,4,opt,name=CustomField,proto3,customtype=testCustomField" json:"CustomField,omitempty"`
 	RequestMetaHeader         `protobuf:"bytes,98,opt,name=Meta,proto3,embedded=Meta" json:"Meta"`
 	RequestVerificationHeader `protobuf:"bytes,99,opt,name=Header,proto3,embedded=Header" json:"Header"`
 	XXX_NoUnkeyedLiteral      struct{} `json:"-"`
@@ -91,26 +92,28 @@ func init() {
 func init() { proto.RegisterFile("service/verify_test.proto", fileDescriptor_1effa83201a30d75) }
 
 var fileDescriptor_1effa83201a30d75 = []byte{
-	// 296 bytes of a gzipped FileDescriptorProto
+	// 322 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x64, 0x90, 0xbf, 0x4e, 0xeb, 0x30,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x64, 0x90, 0x31, 0x4f, 0xc3, 0x30,
-	0x14, 0xc6, 0xeb, 0x7b, 0xa1, 0x14, 0x97, 0xc9, 0x62, 0x28, 0x19, 0xdc, 0xa8, 0x53, 0x96, 0x26,
+	0x10, 0x85, 0xeb, 0x52, 0x4a, 0x71, 0x90, 0x90, 0x0c, 0x43, 0xc9, 0x90, 0x46, 0x9d, 0xb2, 0x34,
-	0x12, 0x2c, 0x4c, 0x0c, 0x15, 0x42, 0x30, 0xb0, 0x04, 0xc4, 0xc0, 0x82, 0x12, 0xe7, 0x24, 0x58,
+	0x91, 0x40, 0x48, 0x4c, 0x0c, 0x01, 0x21, 0x18, 0x58, 0x02, 0x62, 0x60, 0x41, 0x49, 0x7a, 0x0d,
-	0xa2, 0x71, 0x89, 0x4f, 0x22, 0xf5, 0x4d, 0x78, 0xa4, 0x8e, 0x1d, 0x99, 0x2a, 0x14, 0x46, 0x5e,
+	0x96, 0x68, 0x5c, 0xe2, 0x4b, 0xa5, 0xfe, 0x13, 0x66, 0x7e, 0x4d, 0xc7, 0x8e, 0x88, 0xa1, 0x42,
-	0x02, 0xd5, 0x36, 0x28, 0xc0, 0x96, 0xef, 0xcf, 0x2f, 0x47, 0xfe, 0xe8, 0x91, 0x86, 0xaa, 0x91,
+	0xe1, 0x8f, 0xa0, 0xd8, 0x06, 0x05, 0xd8, 0xfc, 0xde, 0xfb, 0x9e, 0xed, 0x3b, 0x7a, 0x20, 0xa1,
-	0x02, 0xa2, 0x06, 0x2a, 0x99, 0x2f, 0x1f, 0x10, 0x34, 0x86, 0x8b, 0x4a, 0xa1, 0x62, 0x7b, 0x2e,
+	0x98, 0xf3, 0x14, 0x82, 0x39, 0x14, 0x7c, 0xb2, 0x78, 0x40, 0x90, 0xe8, 0xcf, 0x0a, 0x81, 0x82,
-	0xf2, 0xd8, 0x57, 0x67, 0x0e, 0x98, 0xd8, 0xd0, 0x3b, 0xfc, 0xc9, 0x39, 0x77, 0x5a, 0x48, 0x7c,
+	0x6d, 0x99, 0xc8, 0x66, 0xdf, 0xcc, 0x14, 0x30, 0xd6, 0xa1, 0xbd, 0xff, 0xbb, 0x67, 0xdc, 0x51,
-	0xac, 0xd3, 0x50, 0xa8, 0x79, 0x54, 0xa8, 0x42, 0x45, 0xc6, 0x4e, 0xeb, 0xdc, 0x28, 0x23, 0xcc,
+	0xc6, 0xf1, 0xb1, 0x4c, 0xfc, 0x54, 0x4c, 0x83, 0x4c, 0x64, 0x22, 0x50, 0x76, 0x52, 0x4e, 0x94,
-	0x97, 0xad, 0x4f, 0x3e, 0x08, 0x1d, 0xde, 0x82, 0xc6, 0x18, 0x9e, 0x6b, 0xd0, 0xc8, 0x3c, 0x3a,
+	0x52, 0x42, 0x9d, 0x34, 0x3e, 0x7c, 0x6d, 0x53, 0xeb, 0x16, 0x24, 0x46, 0xf0, 0x5c, 0x82, 0x44,
-	0xb8, 0x2a, 0xf1, 0x42, 0xc2, 0x53, 0x36, 0x22, 0x3e, 0x09, 0x76, 0xe3, 0x6f, 0xcd, 0x7c, 0x3a,
+	0x66, 0xd3, 0xde, 0x55, 0x8e, 0x17, 0x1c, 0x9e, 0xc6, 0x7d, 0xe2, 0x12, 0x6f, 0x33, 0xfa, 0xd1,
-	0xbc, 0xc1, 0x4a, 0x96, 0x85, 0x8d, 0xff, 0xf9, 0x24, 0xd8, 0x8f, 0xbb, 0x16, 0xe3, 0x94, 0xce,
+	0xcc, 0xa5, 0xd6, 0x0d, 0x16, 0x3c, 0xcf, 0x74, 0xdc, 0x76, 0x89, 0xb7, 0x1d, 0x35, 0x2d, 0xe6,
-	0x96, 0x08, 0xda, 0x16, 0xfe, 0xfb, 0x24, 0x38, 0x88, 0x3b, 0x0e, 0x3b, 0xa5, 0x3b, 0xd7, 0x80,
+	0x50, 0x1a, 0x2e, 0x10, 0xa4, 0x06, 0x36, 0x5c, 0xe2, 0xed, 0x44, 0x0d, 0x87, 0x1d, 0x53, 0xeb,
-	0xc9, 0x28, 0xf5, 0x49, 0x30, 0x3c, 0xf6, 0x42, 0xf7, 0x82, 0xd0, 0x5d, 0xdf, 0x66, 0x97, 0x90,
+	0xac, 0x94, 0x28, 0xa6, 0x1a, 0xe8, 0xd4, 0x40, 0xb8, 0xf7, 0xbe, 0x1e, 0xec, 0xd6, 0x43, 0x37,
-	0x64, 0x50, 0xcd, 0x06, 0xab, 0xcd, 0xb8, 0xb7, 0xde, 0x8c, 0x49, 0x6c, 0x08, 0x76, 0x4e, 0xfb,
+	0xa2, 0xa8, 0xc9, 0xb1, 0x13, 0xda, 0xb9, 0x06, 0x8c, 0xfb, 0x89, 0x4b, 0x3c, 0xeb, 0xd0, 0xf6,
-	0x36, 0x19, 0x09, 0xc3, 0x4e, 0x7e, 0xb3, 0x77, 0xdb, 0x11, 0xa4, 0x48, 0x50, 0xaa, 0xf2, 0xcf,
+	0xcd, 0xe0, 0xbe, 0xf9, 0x74, 0x9d, 0x5d, 0x42, 0x3c, 0x86, 0x22, 0xec, 0x2d, 0xd7, 0x83, 0xd6,
-	0x3f, 0x1c, 0x3b, 0x3b, 0x5b, 0xb5, 0x9c, 0xac, 0x5b, 0x4e, 0x5e, 0x5b, 0x4e, 0xde, 0x5a, 0x4e,
+	0x6a, 0x3d, 0x20, 0x91, 0x6a, 0xb0, 0x73, 0xda, 0xd5, 0x49, 0x3f, 0x55, 0xdd, 0xe1, 0xdf, 0xee,
-	0x5e, 0xde, 0x79, 0xef, 0x3e, 0xe8, 0x4c, 0x56, 0xea, 0x85, 0x10, 0xd3, 0x0c, 0x9a, 0xa8, 0x04,
+	0x5d, 0xbd, 0x3b, 0x9e, 0xc6, 0xc8, 0x45, 0xfe, 0xef, 0x0e, 0xd3, 0x0d, 0x4f, 0x97, 0x95, 0x43,
-	0x95, 0xeb, 0xa9, 0x1d, 0xcc, 0xdd, 0x4a, 0xfb, 0x46, 0x9e, 0x7c, 0x06, 0x00, 0x00, 0xff, 0xff,
+	0x56, 0x95, 0x43, 0xde, 0x2a, 0x87, 0x7c, 0x54, 0x0e, 0x79, 0xf9, 0x74, 0x5a, 0xf7, 0x5e, 0x63,
-	0xa6, 0xdb, 0x5f, 0x7a, 0xb3, 0x01, 0x00, 0x00,
+	0xd3, 0xb9, 0x9c, 0xa5, 0xe9, 0x68, 0x0c, 0xf3, 0x20, 0x07, 0x31, 0x91, 0x23, 0xbd, 0x67, 0xf3,
+	0x56, 0xd2, 0x55, 0xf2, 0xe8, 0x2b, 0x00, 0x00, 0xff, 0xff, 0xf7, 0x37, 0x92, 0xd2, 0xea, 0x01,
+	0x00, 0x00,
 }
 
 func (m *TestRequest) Marshal() (dAtA []byte, err error) {
@@ -161,6 +164,18 @@ func (m *TestRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	dAtA[i] = 0x6
 	i--
 	dAtA[i] = 0x92
+	if m.CustomField != nil {
+		{
+			size := m.CustomField.Size()
+			i -= size
+			if _, err := m.CustomField.MarshalTo(dAtA[i:]); err != nil {
+				return 0, err
+			}
+			i = encodeVarintVerifyTest(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x22
+	}
 	if len(m.BytesField) > 0 {
 		i -= len(m.BytesField)
 		copy(dAtA[i:], m.BytesField)
@@ -211,6 +226,10 @@ func (m *TestRequest) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovVerifyTest(uint64(l))
 	}
+	if m.CustomField != nil {
+		l = m.CustomField.Size()
+		n += 1 + l + sovVerifyTest(uint64(l))
+	}
 	l = m.RequestMetaHeader.Size()
 	n += 2 + l + sovVerifyTest(uint64(l))
 	l = m.RequestVerificationHeader.Size()
@@ -341,6 +360,41 @@ func (m *TestRequest) Unmarshal(dAtA []byte) error {
 				m.BytesField = []byte{}
 			}
 			iNdEx = postIndex
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field CustomField", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowVerifyTest
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthVerifyTest
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthVerifyTest
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			var v testCustomField
+			m.CustomField = &v
+			if err := m.CustomField.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		case 98:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field RequestMetaHeader", wireType)

service/verify_test.proto

@@ -12,6 +12,7 @@ message TestRequest {
     int32 IntField                   = 1;
     string StringField               = 2;
     bytes BytesField                 = 3;
+    bytes CustomField                = 4 [(gogoproto.customtype) = "testCustomField"];
     RequestMetaHeader Meta           = 98 [(gogoproto.embed) = true, (gogoproto.nullable) = false];
     RequestVerificationHeader Header = 99 [(gogoproto.embed) = true, (gogoproto.nullable) = false];
 }