Server key component (#1050)

* Server key API (works for monolith but not for polylith yet)

* Re-enable caching on server key API component

* Groundwork for HTTP APIs for server key API

* Hopefully implement HTTP for server key API

* Simplify public key request marshalling from map keys

* Update gomatrixserverlib

* go mod tidy

* Common -> internal

* remove keyring.go

* Update Docker Hub for server key API

* YAML is funny about indentation

* Wire in new server key API into hybrid monolith mode

* Create maps

* Route server key API endpoints on internal API mux

* Fix server key API URLs

* Add fetcher behaviour into server key API implementation

* Return error if we failed to fetch some keys

* Return results anyway

* Move things about a bit

* Remove unused code

* Fix comments, don't use federation sender URL in polylith mode

* Add server_key_api to sample config

* Review comments

* HTTP API to cache keys that have been requested

* Overwrite server_key_api listen in monolith hybrid mode

1 files changed, 50 insertions, 0 deletions

diff --git a/serverkeyapi/storage/keydb_wasm.go b/serverkeyapi/storage/keydb_wasm.go
new file mode 100644
index 00000000..3d2ca550
--- /dev/null
+++ b/serverkeyapi/storage/keydb_wasm.go
@@ -0,0 +1,50 @@
+// Copyright 2020 The Matrix.org Foundation C.I.C.
+//
+// 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.
+
+// +build wasm
+
+package storage
+
+import (
+	"fmt"
+	"net/url"
+
+	"golang.org/x/crypto/ed25519"
+
+	"github.com/matrix-org/dendrite/internal"
+	"github.com/matrix-org/dendrite/serverkeyapi/storage/sqlite3"
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+// NewDatabase opens a database connection.
+func NewDatabase(
+	dataSourceName string,
+	dbProperties internal.DbProperties, // nolint:unparam
+	serverName gomatrixserverlib.ServerName,
+	serverKey ed25519.PublicKey,
+	serverKeyID gomatrixserverlib.KeyID,
+) (Database, error) {
+	uri, err := url.Parse(dataSourceName)
+	if err != nil {
+		return nil, err
+	}
+	switch uri.Scheme {
+	case "postgres":
+		return nil, fmt.Errorf("Cannot use postgres implementation")
+	case "file":
+		return sqlite3.NewDatabase(dataSourceName, serverName, serverKey, serverKeyID)
+	default:
+		return nil, fmt.Errorf("Cannot use postgres implementation")
+	}
+}