diff --git a/cmd/neofs-rest-gw/integration_test.go b/cmd/neofs-rest-gw/integration_test.go
index 73246f6..79206b0 100644
--- a/cmd/neofs-rest-gw/integration_test.go
+++ b/cmd/neofs-rest-gw/integration_test.go
@@ -3,10 +3,6 @@ package main
 import (
 	"bytes"
 	"context"
-	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/rand"
-	"crypto/sha512"
 	"encoding/base64"
 	"encoding/hex"
 	"encoding/json"
@@ -1061,10 +1057,9 @@ func makeAuthTokenRequest(ctx context.Context, t *testing.T, bearers []*models.B
 }
 
 func signToken(t *testing.T, key *keys.PrivateKey, data []byte) *handlers.BearerToken {
-	h := sha512.Sum512(data)
-	x, y, err := ecdsa.Sign(rand.Reader, &key.PrivateKey, h[:])
+	signer := neofsecdsa.Signer(key.PrivateKey)
+	sign, err := signer.Sign(data)
 	require.NoError(t, err)
-	sign := elliptic.Marshal(elliptic.P256(), x, y)
 
 	return &handlers.BearerToken{
 		Token:     base64.StdEncoding.EncodeToString(data),
diff --git a/handlers/auth_test.go b/handlers/auth_test.go
index ebc2c98..ae953fb 100644
--- a/handlers/auth_test.go
+++ b/handlers/auth_test.go
@@ -2,9 +2,6 @@ package handlers
 
 import (
 	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/rand"
-	"crypto/sha512"
 	"encoding/base64"
 	"encoding/hex"
 	"math"
@@ -12,6 +9,7 @@ import (
 
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neofs-api-go/v2/acl"
+	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/nspcc-dev/neofs-rest-gw/gen/models"
 	"github.com/nspcc-dev/neofs-rest-gw/internal/util"
 	"github.com/nspcc-dev/neofs-sdk-go/user"
@@ -54,12 +52,8 @@ func TestSign(t *testing.T) {
 	binaryBearer := v2token.GetBody().StableMarshal(nil)
 	bearerBase64 := base64.StdEncoding.EncodeToString(binaryBearer)
 
-	h := sha512.Sum512(binaryBearer)
-	x, y, err := ecdsa.Sign(rand.Reader, &key.PrivateKey, h[:])
-	if err != nil {
-		panic(err)
-	}
-	signatureData := elliptic.Marshal(elliptic.P256(), x, y)
+	signatureData, err := crypto.Sign(&key.PrivateKey, binaryBearer)
+	require.NoError(t, err)
 
 	bt := &BearerToken{
 		Token:     bearerBase64,