[#943] service/object: Remove KeyStore from CommonPrm

There is no point to pass key storage in parameters because
it can be defined on the service level of application.

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/services/object/search/service.go

@@ -1,8 +1,11 @@
 package searchsvc
 
 import (
+	"crypto/ecdsa"
+
 	cid "github.com/nspcc-dev/neofs-api-go/pkg/container/id"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/nspcc-dev/neofs-api-go/pkg/session"
 	"github.com/nspcc-dev/neofs-node/pkg/core/client"
 	"github.com/nspcc-dev/neofs-node/pkg/core/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/engine"
@@ -47,6 +50,10 @@ type cfg struct {
 	currentEpochReceiver interface {
 		currentEpoch() (uint64, error)
 	}
+
+	keyStore interface {
+		GetKey(token *session.Token) (*ecdsa.PrivateKey, error)
+	}
 }
 
 func defaultCfg() *cfg {
@@ -109,3 +116,11 @@ func WithNetMapSource(nmSrc netmap.Source) Option {
 		}
 	}
 }
+
+// WithKeyStorage returns option to set private
+// key storage for session tokens and node key.
+func WithKeyStorage(store *util.KeyStorage) Option {
+	return func(c *cfg) {
+		c.keyStore = store
+	}
+}

pkg/services/object/search/util.go

@@ -83,7 +83,7 @@ func (c *clientWrapper) searchObjects(exec *execCtx, info client.NodeInfo) ([]*o
 		return exec.prm.forwarder(info, c.client)
 	}
 
-	key, err := exec.prm.common.KeyStorage().GetKey(exec.prm.common.SessionToken())
+	key, err := exec.svc.keyStore.GetKey(exec.prm.common.SessionToken())
 	if err != nil {
 		return nil, err
 	}

pkg/services/object/search/v2/util.go

@@ -30,9 +30,7 @@ func (s *Service) toPrm(req *objectV2.SearchRequest, stream objectSvc.SearchStre
 	}
 
 	p := new(searchsvc.Prm)
-	p.SetCommonParameters(commonPrm.
-		WithKeyStorage(s.keyStorage),
-	)
+	p.SetCommonParameters(commonPrm)
 
 	p.SetWriter(&streamWriter{
 		stream: stream,