[#1] Add basic structure and operations

Signed-off-by: Denis Kirillov <denis@nspcc.ru>

handlers/auth_test.go

@@ -0,0 +1,66 @@
+package handlers
+
+import (
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"crypto/sha512"
+	"encoding/base64"
+	"encoding/hex"
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/nspcc-dev/neofs-rest-gw/gen/models"
+	"github.com/nspcc-dev/neofs-sdk-go/owner"
+	"github.com/stretchr/testify/require"
+)
+
+const devenvPrivateKey = "1dd37fba80fec4e6a6f13fd708d8dcb3b29def768017052f6c930fa1c5d90bbb"
+
+func TestSign(t *testing.T) {
+	key, err := keys.NewPrivateKeyFromHex(devenvPrivateKey)
+	require.NoError(t, err)
+
+	pubKeyHex := hex.EncodeToString(key.PublicKey().Bytes())
+
+	b := &models.Bearer{
+		Object: []*models.Record{{
+			Operation: models.NewOperation(models.OperationPUT),
+			Action:    models.NewAction(models.ActionALLOW),
+			Filters:   []*models.Filter{},
+			Targets: []*models.Target{{
+				Role: models.NewRole(models.RoleOTHERS),
+				Keys: []string{},
+			}},
+		}},
+	}
+
+	btoken, err := ToNativeObjectToken(b)
+	require.NoError(t, err)
+
+	ownerKey, err := keys.NewPublicKeyFromString(pubKeyHex)
+	require.NoError(t, err)
+
+	btoken.SetOwner(owner.NewIDFromPublicKey((*ecdsa.PublicKey)(ownerKey)))
+
+	binaryBearer, err := btoken.ToV2().GetBody().StableMarshal(nil)
+	require.NoError(t, err)
+
+	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)
+
+	bt := &BearerToken{
+		Token:     bearerBase64,
+		Signature: base64.StdEncoding.EncodeToString(signatureData),
+		Key:       pubKeyHex,
+	}
+
+	_, err = prepareBearerToken(bt)
+	require.NoError(t, err)
+}