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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 sqlite3
import (
"context"
"database/sql"
"strings"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
const serverKeysSchema = `
-- A cache of signing keys downloaded from remote servers.
CREATE TABLE IF NOT EXISTS keydb_server_keys (
-- The name of the matrix server the key is for.
server_name TEXT NOT NULL,
-- The ID of the server key.
server_key_id TEXT NOT NULL,
-- Combined server name and key ID separated by the ASCII unit separator
-- to make it easier to run bulk queries.
server_name_and_key_id TEXT NOT NULL,
-- When the key is valid until as a millisecond timestamp.
-- 0 if this is an expired key (in which case expired_ts will be non-zero)
valid_until_ts BIGINT NOT NULL,
-- When the key expired as a millisecond timestamp.
-- 0 if this is an active key (in which case valid_until_ts will be non-zero)
expired_ts BIGINT NOT NULL,
-- The base64-encoded public key.
server_key TEXT NOT NULL,
UNIQUE (server_name, server_key_id)
);
CREATE INDEX IF NOT EXISTS keydb_server_name_and_key_id ON keydb_server_keys (server_name_and_key_id);
`
const bulkSelectServerKeysSQL = "" +
"SELECT server_name, server_key_id, valid_until_ts, expired_ts, " +
" server_key FROM keydb_server_keys" +
" WHERE server_name_and_key_id IN ($1)"
const upsertServerKeysSQL = "" +
"INSERT INTO keydb_server_keys (server_name, server_key_id," +
" server_name_and_key_id, valid_until_ts, expired_ts, server_key)" +
" VALUES ($1, $2, $3, $4, $5, $6)" +
" ON CONFLICT (server_name, server_key_id)" +
" DO UPDATE SET valid_until_ts = $4, expired_ts = $5, server_key = $6"
type serverKeyStatements struct {
db *sql.DB
writer sqlutil.TransactionWriter
bulkSelectServerKeysStmt *sql.Stmt
upsertServerKeysStmt *sql.Stmt
}
func (s *serverKeyStatements) prepare(db *sql.DB) (err error) {
s.db = db
s.writer = sqlutil.NewTransactionWriter()
_, err = db.Exec(serverKeysSchema)
if err != nil {
return
}
if s.bulkSelectServerKeysStmt, err = db.Prepare(bulkSelectServerKeysSQL); err != nil {
return
}
if s.upsertServerKeysStmt, err = db.Prepare(upsertServerKeysSQL); err != nil {
return
}
return
}
func (s *serverKeyStatements) bulkSelectServerKeys(
ctx context.Context,
requests map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.Timestamp,
) (map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult, error) {
var nameAndKeyIDs []string
for request := range requests {
nameAndKeyIDs = append(nameAndKeyIDs, nameAndKeyID(request))
}
query := strings.Replace(bulkSelectServerKeysSQL, "($1)", sqlutil.QueryVariadic(len(nameAndKeyIDs)), 1)
iKeyIDs := make([]interface{}, len(nameAndKeyIDs))
for i, v := range nameAndKeyIDs {
iKeyIDs[i] = v
}
rows, err := s.db.QueryContext(ctx, query, iKeyIDs...)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectServerKeys: rows.close() failed")
results := map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult{}
for rows.Next() {
var serverName string
var keyID string
var key string
var validUntilTS int64
var expiredTS int64
if err = rows.Scan(&serverName, &keyID, &validUntilTS, &expiredTS, &key); err != nil {
return nil, err
}
r := gomatrixserverlib.PublicKeyLookupRequest{
ServerName: gomatrixserverlib.ServerName(serverName),
KeyID: gomatrixserverlib.KeyID(keyID),
}
vk := gomatrixserverlib.VerifyKey{}
err = vk.Key.Decode(key)
if err != nil {
return nil, err
}
results[r] = gomatrixserverlib.PublicKeyLookupResult{
VerifyKey: vk,
ValidUntilTS: gomatrixserverlib.Timestamp(validUntilTS),
ExpiredTS: gomatrixserverlib.Timestamp(expiredTS),
}
}
return results, nil
}
func (s *serverKeyStatements) upsertServerKeys(
ctx context.Context,
request gomatrixserverlib.PublicKeyLookupRequest,
key gomatrixserverlib.PublicKeyLookupResult,
) error {
return s.writer.Do(s.db, nil, func(txn *sql.Tx) error {
stmt := sqlutil.TxStmt(txn, s.upsertServerKeysStmt)
_, err := stmt.ExecContext(
ctx,
string(request.ServerName),
string(request.KeyID),
nameAndKeyID(request),
key.ValidUntilTS,
key.ExpiredTS,
key.Key.Encode(),
)
return err
})
}
func nameAndKeyID(request gomatrixserverlib.PublicKeyLookupRequest) string {
return string(request.ServerName) + "\x1F" + string(request.KeyID)
}
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