5 changed files with 133 additions and 80 deletions
--- a/pkg/services/object/get/exec.go
+++ b/pkg/services/object/get/exec.go
@ -181,7 +181,7 @@ func (exec *execCtx) generateTraverser(addr oid.Address) (*placement.Traverser,
 	}
 }

-func (exec execCtx) remoteClient(info clientcore.NodeInfo) (remoteStorage, bool) {
+func (exec execCtx) getRemoteStorage(info clientcore.NodeInfo) (remoteStorage, bool) {
 	rs, err := exec.svc.remoteStorageConstructor.Get(info)
 	if err != nil {
 		exec.status = statusUndefined
--- a/pkg/services/object/get/get_test.go
+++ b/pkg/services/object/get/get_test.go
@ -2,6 +2,7 @@ package getsvc

 import (
 	"context"
+	"crypto/ecdsa"
 	"crypto/rand"
 	"errors"
 	"fmt"
@ -117,8 +118,15 @@ func newTestClient() *testClient {
 	}
 }

-func (c *testClient) GetObject(ctx context.Context, exec *execCtx, _ client.NodeInfo) (*objectSDK.Object, error) {
-	v, ok := c.results[exec.address().EncodeToString()]
+func (c *testClient) addResult(addr oid.Address, obj *objectSDK.Object, err error) {
+	c.results[addr.EncodeToString()] = struct {
+		obj *objectSDK.Object
+		err error
+	}{obj: obj, err: err}
+}
+
+func (c *testClient) Get(ctx context.Context, address oid.Address, requestParams RemoteRequestParams) (*objectSDK.Object, error) {
+	v, ok := c.results[address.EncodeToString()]
 	if !ok {
 		var errNotFound apistatus.ObjectNotFound

@ -129,14 +137,23 @@ func (c *testClient) GetObject(ctx context.Context, exec *execCtx, _ client.Node
 		return nil, v.err
 	}

-	return cutToRange(v.obj, exec.ctxRange()), nil
+	return v.obj, nil
 }

-func (c *testClient) addResult(addr oid.Address, obj *objectSDK.Object, err error) {
-	c.results[addr.EncodeToString()] = struct {
-		obj *objectSDK.Object
-		err error
-	}{obj: obj, err: err}
+func (c *testClient) Head(ctx context.Context, address oid.Address, requestParams RemoteRequestParams) (*objectSDK.Object, error) {
+	return c.Get(ctx, address, requestParams)
+}
+
+func (c *testClient) Range(ctx context.Context, address oid.Address, rng *objectSDK.Range, requestParams RemoteRequestParams) (*objectSDK.Object, error) {
+	obj, err := c.Get(ctx, address, requestParams)
+	if err != nil {
+		return nil, err
+	}
+	return cutToRange(obj, rng), nil
+}
+
+func (c *testClient) ForwardRequest(ctx context.Context, info client.NodeInfo, forwarder RequestForwarder) (*objectSDK.Object, error) {
+	return nil, fmt.Errorf("not implemented")
 }

 func (s *testStorage) Get(ctx context.Context, address oid.Address) (*objectSDK.Object, error) {
@ -249,6 +266,13 @@ func (w *writePayloadErrorObjectWriter) WriteChunk(_ context.Context, _ []byte)
 	return &writePayloadError{}
 }

+type testKeyStorage struct {
+}
+
+func (ks *testKeyStorage) GetKey(_ *util.SessionInfo) (*ecdsa.PrivateKey, error) {
+	return &ecdsa.PrivateKey{}, nil
+}
+
 func TestGetLocalOnly(t *testing.T) {
 	ctx := context.Background()

@ -526,6 +550,7 @@ func TestGetRemoteSmall(t *testing.T) {
 			},
 			epochSource:              testEpochReceiver(curEpoch),
 			remoteStorageConstructor: c,
+			keyStore:                 &testKeyStorage{},
 		}
 	}

@ -1673,6 +1698,7 @@ func TestGetFromPastEpoch(t *testing.T) {
 				as[1][1]: c22,
 			},
 		},
+		keyStore: &testKeyStorage{},
 	}

 	w := NewSimpleObjectWriter()
--- a/pkg/services/object/get/remote.go
+++ b/pkg/services/object/get/remote.go
@ -18,12 +18,12 @@ func (exec *execCtx) processNode(ctx context.Context, info client.NodeInfo) bool

 	exec.log.Debug(logs.ProcessingNode)

-	client, ok := exec.remoteClient(info)
+	rs, ok := exec.getRemoteStorage(info)
 	if !ok {
 		return true
 	}

-	obj, err := client.GetObject(ctx, exec, info)
+	obj, err := exec.getRemote(ctx, rs, info)

 	var errSplitInfo *objectSDK.SplitInfoError
 	var errRemoved *apistatus.ObjectAlreadyRemoved
@ -64,3 +64,37 @@ func (exec *execCtx) processNode(ctx context.Context, info client.NodeInfo) bool

 	return exec.status != statusUndefined
 }
+
+func (exec *execCtx) getRemote(ctx context.Context, rs remoteStorage, info client.NodeInfo) (*objectSDK.Object, error) {
+	if exec.isForwardingEnabled() {
+		return rs.ForwardRequest(ctx, info, exec.prm.forwarder)
+	}
+
+	key, err := exec.key()
+	if err != nil {
+		return nil, err
+	}
+
+	prm := RemoteRequestParams{
+		Epoch:        exec.curProcEpoch,
+		TTL:          exec.prm.common.TTL(),
+		PrivateKey:   key,
+		SessionToken: exec.prm.common.SessionToken(),
+		BearerToken:  exec.prm.common.BearerToken(),
+		XHeaders:     exec.prm.common.XHeaders(),
+		IsRaw:        exec.isRaw(),
+	}
+
+	if exec.headOnly() {
+		return rs.Head(ctx, exec.address(), prm)
+	}
+	// we don't specify payload writer because we accumulate
+	// the object locally (even huge).
+	if rng := exec.ctxRange(); rng != nil {
+		// Current spec allows other storage node to deny access,
+		// fallback to GET here.
+		return rs.Range(ctx, exec.address(), rng, prm)
+	}
+
+	return rs.Get(ctx, exec.address(), prm)
+}
--- a/pkg/services/object/get/types.go
+++ b/pkg/services/object/get/types.go
@ -5,17 +5,17 @@ import (
 	"crypto/ecdsa"
 	"errors"

-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client"
 	coreclient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/engine"
 	internalclient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/internal/client"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/util"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/placement"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
 	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
 )

 type epochSource interface {
@ -37,18 +37,18 @@ type localStorageEngine interface {
 }

 type clientConstructor interface {
-	Get(client.NodeInfo) (client.MultiAddressClient, error)
+	Get(coreclient.NodeInfo) (coreclient.MultiAddressClient, error)
 }

 type remoteStorageConstructor interface {
-	Get(client.NodeInfo) (remoteStorage, error)
+	Get(coreclient.NodeInfo) (remoteStorage, error)
 }

 type multiclientRemoteStorageConstructor struct {
 	clientConstructor clientConstructor
 }

-func (c *multiclientRemoteStorageConstructor) Get(info client.NodeInfo) (remoteStorage, error) {
+func (c *multiclientRemoteStorageConstructor) Get(info coreclient.NodeInfo) (remoteStorage, error) {
 	clt, err := c.clientConstructor.Get(info)
 	if err != nil {
 		return nil, err
@ -59,10 +59,6 @@ func (c *multiclientRemoteStorageConstructor) Get(info client.NodeInfo) (remoteS
 	}, nil
 }

-type remoteStorage interface {
-	GetObject(context.Context, *execCtx, client.NodeInfo) (*objectSDK.Object, error)
-}
-
 type localStorage interface {
 	Head(ctx context.Context, address oid.Address, isRaw bool) (*objectSDK.Object, error)
 	Range(ctx context.Context, address oid.Address, rng *objectSDK.Range) (*objectSDK.Object, error)
@ -111,48 +107,45 @@ func (s *engineLocalStorage) Get(ctx context.Context, address oid.Address) (*obj
 	return r.Object(), nil
 }

+type RemoteRequestParams struct {
+	Epoch        uint64
+	TTL          uint32
+	PrivateKey   *ecdsa.PrivateKey
+	SessionToken *session.Object
+	BearerToken  *bearer.Token
+	XHeaders     []string
+	IsRaw        bool
+}
+
+type remoteStorage interface {
+	Get(ctx context.Context, address oid.Address, requestParams RemoteRequestParams) (*objectSDK.Object, error)
+	Head(ctx context.Context, address oid.Address, requestParams RemoteRequestParams) (*objectSDK.Object, error)
+	Range(ctx context.Context, address oid.Address, rng *objectSDK.Range, requestParams RemoteRequestParams) (*objectSDK.Object, error)
+
+	ForwardRequest(ctx context.Context, info coreclient.NodeInfo, forwarder RequestForwarder) (*objectSDK.Object, error)
+}
+
 type multiaddressRemoteStorage struct {
 	client coreclient.MultiAddressClient
 }

-func (s *multiaddressRemoteStorage) GetObject(ctx context.Context, exec *execCtx, info coreclient.NodeInfo) (*objectSDK.Object, error) {
-	if exec.isForwardingEnabled() {
-		return exec.prm.forwarder(ctx, info, s.client)
-	}
-
-	key, err := exec.key()
-	if err != nil {
-		return nil, err
-	}
-
-	if exec.headOnly() {
-		return s.getHeadOnly(ctx, exec, key)
-	}
-	// we don't specify payload writer because we accumulate
-	// the object locally (even huge).
-	if rng := exec.ctxRange(); rng != nil {
-		// Current spec allows other storage node to deny access,
-		// fallback to GET here.
-		return s.getRange(ctx, exec, key, rng)
-	}
-
-	return s.get(ctx, exec, key)
+func (s *multiaddressRemoteStorage) ForwardRequest(ctx context.Context, info coreclient.NodeInfo, forwarder RequestForwarder) (*objectSDK.Object, error) {
+	return forwarder(ctx, info, s.client)
 }

-func (s *multiaddressRemoteStorage) getRange(ctx context.Context, exec *execCtx, key *ecdsa.PrivateKey, rng *object.Range) (*object.Object, error) {
+func (s *multiaddressRemoteStorage) Range(ctx context.Context, address oid.Address, rng *objectSDK.Range, requestParams RemoteRequestParams) (*objectSDK.Object, error) {
 	var prm internalclient.PayloadRangePrm

 	prm.SetClient(s.client)
-	prm.SetTTL(exec.prm.common.TTL())
-	prm.SetNetmapEpoch(exec.curProcEpoch)
-	prm.SetAddress(exec.address())
-	prm.SetPrivateKey(key)
-	prm.SetSessionToken(exec.prm.common.SessionToken())
-	prm.SetBearerToken(exec.prm.common.BearerToken())
-	prm.SetXHeaders(exec.prm.common.XHeaders())
+	prm.SetTTL(requestParams.TTL)
+	prm.SetNetmapEpoch(requestParams.Epoch)
+	prm.SetAddress(address)
+	prm.SetPrivateKey(requestParams.PrivateKey)
+	prm.SetSessionToken(requestParams.SessionToken)
+	prm.SetBearerToken(requestParams.BearerToken)
+	prm.SetXHeaders(requestParams.XHeaders)
 	prm.SetRange(rng)
-
-	if exec.isRaw() {
+	if requestParams.IsRaw {
 		prm.SetRawFlag()
 	}

@ -160,7 +153,7 @@ func (s *multiaddressRemoteStorage) getRange(ctx context.Context, exec *execCtx,
 	if err != nil {
 		var errAccessDenied *apistatus.ObjectAccessDenied
 		if errors.As(err, &errAccessDenied) {
-			obj, err := s.get(ctx, exec, key)
+			obj, err := s.Get(ctx, address, requestParams)
 			if err != nil {
 				return nil, err
 			}
@ -173,27 +166,27 @@ func (s *multiaddressRemoteStorage) getRange(ctx context.Context, exec *execCtx,
 				return nil, new(apistatus.ObjectOutOfRange)
 			}

-			return payloadOnlyObject(payload[from:to]), nil
+			return s.payloadOnlyObject(payload[from:to]), nil
 		}
 		return nil, err
 	}

-	return payloadOnlyObject(res.PayloadRange()), nil
+	return s.payloadOnlyObject(res.PayloadRange()), nil
 }

-func (s *multiaddressRemoteStorage) getHeadOnly(ctx context.Context, exec *execCtx, key *ecdsa.PrivateKey) (*object.Object, error) {
+func (s *multiaddressRemoteStorage) Head(ctx context.Context, address oid.Address, requestParams RemoteRequestParams) (*objectSDK.Object, error) {
 	var prm internalclient.HeadObjectPrm

 	prm.SetClient(s.client)
-	prm.SetTTL(exec.prm.common.TTL())
-	prm.SetNetmapEpoch(exec.curProcEpoch)
-	prm.SetAddress(exec.address())
-	prm.SetPrivateKey(key)
-	prm.SetSessionToken(exec.prm.common.SessionToken())
-	prm.SetBearerToken(exec.prm.common.BearerToken())
-	prm.SetXHeaders(exec.prm.common.XHeaders())
+	prm.SetTTL(requestParams.TTL)
+	prm.SetNetmapEpoch(requestParams.Epoch)
+	prm.SetAddress(address)
+	prm.SetPrivateKey(requestParams.PrivateKey)
+	prm.SetSessionToken(requestParams.SessionToken)
+	prm.SetBearerToken(requestParams.BearerToken)
+	prm.SetXHeaders(requestParams.XHeaders)

-	if exec.isRaw() {
+	if requestParams.IsRaw {
 		prm.SetRawFlag()
 	}

@ -205,19 +198,19 @@ func (s *multiaddressRemoteStorage) getHeadOnly(ctx context.Context, exec *execC
 	return res.Header(), nil
 }

-func (s *multiaddressRemoteStorage) get(ctx context.Context, exec *execCtx, key *ecdsa.PrivateKey) (*object.Object, error) {
+func (s *multiaddressRemoteStorage) Get(ctx context.Context, address oid.Address, requestParams RemoteRequestParams) (*objectSDK.Object, error) {
 	var prm internalclient.GetObjectPrm

 	prm.SetClient(s.client)
-	prm.SetTTL(exec.prm.common.TTL())
-	prm.SetNetmapEpoch(exec.curProcEpoch)
-	prm.SetAddress(exec.address())
-	prm.SetPrivateKey(key)
-	prm.SetSessionToken(exec.prm.common.SessionToken())
-	prm.SetBearerToken(exec.prm.common.BearerToken())
-	prm.SetXHeaders(exec.prm.common.XHeaders())
+	prm.SetTTL(requestParams.TTL)
+	prm.SetNetmapEpoch(requestParams.Epoch)
+	prm.SetAddress(address)
+	prm.SetPrivateKey(requestParams.PrivateKey)
+	prm.SetSessionToken(requestParams.SessionToken)
+	prm.SetBearerToken(requestParams.BearerToken)
+	prm.SetXHeaders(requestParams.XHeaders)

-	if exec.isRaw() {
+	if requestParams.IsRaw {
 		prm.SetRawFlag()
 	}

@ -228,3 +221,10 @@ func (s *multiaddressRemoteStorage) get(ctx context.Context, exec *execCtx, key

 	return res.Object(), nil
 }
+
+func (s *multiaddressRemoteStorage) payloadOnlyObject(payload []byte) *objectSDK.Object {
+	obj := objectSDK.New()
+	obj.SetPayload(payload)
+
+	return obj
+}
--- a/pkg/services/object/get/util.go
+++ b/pkg/services/object/get/util.go
@ -60,13 +60,6 @@ func (w *partWriter) WriteHeader(ctx context.Context, o *object.Object) error {
 	return w.headWriter.WriteHeader(ctx, o)
 }

-func payloadOnlyObject(payload []byte) *object.Object {
-	obj := object.New()
-	obj.SetPayload(payload)
-
-	return obj
-}
-
 func (h *hasherWrapper) WriteChunk(_ context.Context, p []byte) error {
 	_, err := h.hash.Write(p)
 	return err