[#53] session: move package from neofs-api-go

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

session/test/token.go

@@ -0,0 +1,64 @@
+package sessiontest
+
+import (
+	"math/rand"
+
+	"github.com/google/uuid"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/nspcc-dev/neofs-sdk-go/owner"
+	"github.com/nspcc-dev/neofs-sdk-go/session"
+)
+
+var p *keys.PrivateKey
+
+func init() {
+	var err error
+
+	p, err = keys.NewPrivateKey()
+	if err != nil {
+		panic(err)
+	}
+}
+
+// Generate returns random session.Token.
+//
+// Resulting token is unsigned.
+func Generate() *session.Token {
+	tok := session.NewToken()
+
+	uid, err := uuid.New().MarshalBinary()
+	if err != nil {
+		panic(err)
+	}
+
+	w := new(owner.NEO3Wallet)
+	rand.Read(w.Bytes())
+
+	ownerID := owner.NewID()
+	ownerID.SetNeo3Wallet(w)
+
+	keyBin := p.PublicKey().Bytes()
+
+	tok.SetID(uid)
+	tok.SetOwnerID(ownerID)
+	tok.SetSessionKey(keyBin)
+	tok.SetExp(11)
+	tok.SetNbf(22)
+	tok.SetIat(33)
+
+	return tok
+}
+
+// GenerateSigned returns signed random session.Token.
+//
+// Panics if token could not be signed (actually unexpected).
+func GenerateSigned() *session.Token {
+	tok := Generate()
+
+	err := tok.Sign(&p.PrivateKey)
+	if err != nil {
+		panic(err)
+	}
+
+	return tok
+}