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// Copyright 2017 New Vector 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 keydb
import (
"encoding/base64"
"github.com/matrix-org/dendrite/internal/config"
"github.com/matrix-org/gomatrixserverlib"
"github.com/sirupsen/logrus"
"golang.org/x/crypto/ed25519"
)
// CreateKeyRing creates and configures a KeyRing object.
//
// It creates the necessary key fetchers and collects them into a KeyRing
// backed by the given KeyDatabase.
func CreateKeyRing(client gomatrixserverlib.Client,
keyDB gomatrixserverlib.KeyDatabase,
cfg config.KeyPerspectives) gomatrixserverlib.KeyRing {
fetchers := gomatrixserverlib.KeyRing{
KeyFetchers: []gomatrixserverlib.KeyFetcher{
&gomatrixserverlib.DirectKeyFetcher{
Client: client,
},
},
KeyDatabase: keyDB,
}
logrus.Info("Enabled direct key fetcher")
var b64e = base64.StdEncoding.WithPadding(base64.NoPadding)
for _, ps := range cfg {
perspective := &gomatrixserverlib.PerspectiveKeyFetcher{
PerspectiveServerName: ps.ServerName,
PerspectiveServerKeys: map[gomatrixserverlib.KeyID]ed25519.PublicKey{},
Client: client,
}
for _, key := range ps.Keys {
rawkey, err := b64e.DecodeString(key.PublicKey)
if err != nil {
logrus.WithError(err).WithFields(logrus.Fields{
"server_name": ps.ServerName,
"public_key": key.PublicKey,
}).Warn("Couldn't parse perspective key")
continue
}
perspective.PerspectiveServerKeys[key.KeyID] = rawkey
}
fetchers.KeyFetchers = append(fetchers.KeyFetchers, perspective)
logrus.WithFields(logrus.Fields{
"server_name": ps.ServerName,
"num_public_keys": len(ps.Keys),
}).Info("Enabled perspective key fetcher")
}
return fetchers
}
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