[#8] Switch outer code to using the new auth scheme

* Removed CLI flag for RSA key
* Passed through peers to auth center to be able to independently interact with a NeoFS node
* Added flag and loader for curve25519 (private) key

Signed-off-by: Pavel Korotkov <pkorotkov@gmail.com>

auth/center.go

@@ -188,3 +188,17 @@ func readAndKeepBody(request *http.Request) (*bytes.Reader, error) {
 	request.Body = ioutil.NopCloser(bytes.NewReader(payload))
 	return bytes.NewReader(payload), nil
 }
+
+func LoadGateAuthPrivateKey(path string) (hcs.X25519PrivateKey, error) {
+	bytes, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	// FIXME: Rework when DecodeKeysFromBytes will arrive.
+	key := string(bytes)
+	privateKey, _, err := hcs.DecodeKeys(&key, nil)
+	if err != nil {
+		return nil, err
+	}
+	return privateKey, nil
+}

cmd/gate/app-settings.go

@@ -4,7 +4,6 @@ import (
 	"crypto/ecdsa"
 	"crypto/elliptic"
 	"crypto/rand"
-	"crypto/rsa"
 	"fmt"
 	"io"
 	"os"
@@ -58,7 +57,7 @@ const ( // settings
 
 	// Keys
 	cfgNeoFSPrivateKey    = "neofs-ecdsa-key"
-	cfgUserAuthPrivateKey = "userauth-rsa-key"
+	cfgGateAuthPrivateKey = "gate-auth-key"
 
 	// HTTPS/TLS
 	cfgTLSKeyFile  = "tls.key_file"
@@ -92,11 +91,10 @@ type empty int
 
 func (empty) Read([]byte) (int, error) { return 0, io.EOF }
 
-func fetchAuthCenter(l *zap.Logger, v *viper.Viper) (*auth.Center, error) {
+func fetchAuthCenter(l *zap.Logger, v *viper.Viper, peers []pool.Peer) (*auth.Center, error) {
 	var (
-		err                error
-		neofsPrivateKey    *ecdsa.PrivateKey
-		userAuthPrivateKey *rsa.PrivateKey
+		err             error
+		neofsPrivateKey *ecdsa.PrivateKey
 	)
 	switch nfspk := v.GetString(cfgNeoFSPrivateKey); nfspk {
 	case generated:
@@ -110,16 +108,17 @@ func fetchAuthCenter(l *zap.Logger, v *viper.Viper) (*auth.Center, error) {
 			return nil, errors.Wrap(err, "could not load NeoFS private key")
 		}
 	}
-	uapk := v.GetString(cfgUserAuthPrivateKey)
-	userAuthPrivateKey, err = auth.ReadRSAPrivateKeyFromPEMFile(uapk)
+	gapk := v.GetString(cfgGateAuthPrivateKey)
+	gateAuthPrivateKey, err := auth.LoadGateAuthPrivateKey(gapk)
 	if err != nil {
-		return nil, errors.Wrapf(err, "could not load UserAuth private key %q", uapk)
+		return nil, errors.Wrapf(err, "could not load gate auth private key %q", gapk)
 	}
-	center, err := auth.NewCenter(l)
+	// NB: Maybe choose a peer more smarter.
+	center, err := auth.NewCenter(l, peers[0].Address)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to create auth center")
 	}
-	center.SetUserAuthKeys(userAuthPrivateKey)
+	center.SetUserAuthKeys(gateAuthPrivateKey)
 	if err = center.SetNeoFSKeys(neofsPrivateKey); err != nil {
 		return nil, err
 	}
@@ -168,7 +167,7 @@ func newSettings() *viper.Viper {
 	version := flags.BoolP("version", "v", false, "show version")
 
 	flags.String(cfgNeoFSPrivateKey, generated, fmt.Sprintf(`set value to hex string, WIF string, or path to NeoFS private key file (use "%s" to generate key)`, generated))
-	flags.String(cfgUserAuthPrivateKey, "", "set path to file with private key to use in auth scheme")
+	flags.String(cfgGateAuthPrivateKey, "", "set path to file with auth (curve25519) private key to use in auth scheme")
 
 	flags.Bool(cfgGRPCVerbose, false, "set debug mode of gRPC connections")
 	flags.Duration(cfgRequestTimeout, defaultRequestTimeout, "set gRPC request timeout")

cmd/gate/app.go

@@ -59,12 +59,11 @@ func newApp(l *zap.Logger, v *viper.Viper) *App {
 		maxClientsCount    = defaultMaxClientsCount
 		maxClientsDeadline = defaultMaxClientsDeadline
 	)
-
-	center, err := fetchAuthCenter(l, v)
+	peers := fetchPeers(l, v)
+	center, err := fetchAuthCenter(l, v, peers)
 	if err != nil {
 		l.Fatal("failed to initialize auth center", zap.Error(err))
 	}
-
 	key = center.GetNeoFSPrivateKey()
 
 	if v.IsSet(cfgTLSKeyFile) && v.IsSet(cfgTLSCertFile) {
@@ -95,7 +94,7 @@ func newApp(l *zap.Logger, v *viper.Viper) *App {
 		ConnectTimeout: v.GetDuration(cfgConnectTimeout),
 		RequestTimeout: v.GetDuration(cfgRequestTimeout),
 
-		Peers: fetchPeers(l, v),
+		Peers: peers,
 
 		Logger:     l,
 		PrivateKey: key,