use go module for dependencies (#594)

federationapi/routing/keys.go

@@ -0,0 +1,68 @@
+// Copyright 2017 Vector Creations Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package routing
+
+import (
+	"encoding/json"
+	"net/http"
+	"time"
+
+	"github.com/matrix-org/dendrite/common/config"
+	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/matrix-org/util"
+	"golang.org/x/crypto/ed25519"
+)
+
+// LocalKeys returns the local keys for the server.
+// See https://matrix.org/docs/spec/server_server/unstable.html#publishing-keys
+func LocalKeys(cfg config.Dendrite) util.JSONResponse {
+	keys, err := localKeys(cfg, time.Now().Add(cfg.Matrix.KeyValidityPeriod))
+	if err != nil {
+		return util.ErrorResponse(err)
+	}
+	return util.JSONResponse{Code: http.StatusOK, JSON: keys}
+}
+
+func localKeys(cfg config.Dendrite, validUntil time.Time) (*gomatrixserverlib.ServerKeys, error) {
+	var keys gomatrixserverlib.ServerKeys
+
+	keys.ServerName = cfg.Matrix.ServerName
+
+	publicKey := cfg.Matrix.PrivateKey.Public().(ed25519.PublicKey)
+
+	keys.VerifyKeys = map[gomatrixserverlib.KeyID]gomatrixserverlib.VerifyKey{
+		cfg.Matrix.KeyID: {
+			Key: gomatrixserverlib.Base64String(publicKey),
+		},
+	}
+
+	keys.TLSFingerprints = cfg.Matrix.TLSFingerPrints
+	keys.OldVerifyKeys = map[gomatrixserverlib.KeyID]gomatrixserverlib.OldVerifyKey{}
+	keys.ValidUntilTS = gomatrixserverlib.AsTimestamp(validUntil)
+
+	toSign, err := json.Marshal(keys.ServerKeyFields)
+	if err != nil {
+		return nil, err
+	}
+
+	keys.Raw, err = gomatrixserverlib.SignJSON(
+		string(cfg.Matrix.ServerName), cfg.Matrix.KeyID, cfg.Matrix.PrivateKey, toSign,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &keys, nil
+}