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// Copyright 2017-2018 New Vector Ltd
// Copyright 2019-2020 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.
package postgres
import (
"context"
"math"
"golang.org/x/crypto/ed25519"
"github.com/matrix-org/dendrite/common"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
// A Database implements gomatrixserverlib.KeyDatabase and is used to store
// the public keys for other matrix servers.
type Database struct {
statements serverKeyStatements
}
// NewDatabase prepares a new key database.
// It creates the necessary tables if they don't already exist.
// It prepares all the SQL statements that it will use.
// Returns an error if there was a problem talking to the database.
func NewDatabase(
dataSourceName string,
dbProperties common.DbProperties,
serverName gomatrixserverlib.ServerName,
serverKey ed25519.PublicKey,
serverKeyID gomatrixserverlib.KeyID,
) (*Database, error) {
db, err := sqlutil.Open("postgres", dataSourceName, dbProperties)
if err != nil {
return nil, err
}
d := &Database{}
err = d.statements.prepare(db)
if err != nil {
return nil, err
}
// Store our own keys so that we don't end up making HTTP requests to find our
// own keys
index := gomatrixserverlib.PublicKeyLookupRequest{
ServerName: serverName,
KeyID: serverKeyID,
}
value := gomatrixserverlib.PublicKeyLookupResult{
VerifyKey: gomatrixserverlib.VerifyKey{
Key: gomatrixserverlib.Base64String(serverKey),
},
ValidUntilTS: math.MaxUint64 >> 1,
ExpiredTS: gomatrixserverlib.PublicKeyNotExpired,
}
err = d.StoreKeys(
context.Background(),
map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult{
index: value,
},
)
if err != nil {
return nil, err
}
return d, nil
}
// FetcherName implements KeyFetcher
func (d Database) FetcherName() string {
return "KeyDatabase"
}
// FetchKeys implements gomatrixserverlib.KeyDatabase
func (d *Database) FetchKeys(
ctx context.Context,
requests map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.Timestamp,
) (map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult, error) {
return d.statements.bulkSelectServerKeys(ctx, requests)
}
// StoreKeys implements gomatrixserverlib.KeyDatabase
func (d *Database) StoreKeys(
ctx context.Context,
keyMap map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult,
) error {
// TODO: Inserting all the keys within a single transaction may
// be more efficient since the transaction overhead can be quite
// high for a single insert statement.
var lastErr error
for request, keys := range keyMap {
if err := d.statements.upsertServerKeys(ctx, request, keys); err != nil {
// Rather than returning immediately on error we try to insert the
// remaining keys.
// Since we are inserting the keys outside of a transaction it is
// possible for some of the inserts to succeed even though some
// of the inserts have failed.
// Ensuring that we always insert all the keys we can means that
// this behaviour won't depend on the iteration order of the map.
lastErr = err
}
}
return lastErr
}
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