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dendrite/src/github.com/matrix-org/dendrite/common/keydb/server_key_table.go

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// 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 keydb
import (
"context"
"database/sql"
"encoding/json"
"github.com/lib/pq"
"github.com/matrix-org/gomatrixserverlib"
)
const serverKeysSchema = `
-- A cache of server 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 keys are valid until as a millisecond timestamp.
valid_until_ts BIGINT NOT NULL,
-- The raw JSON for the server key.
server_key_json TEXT NOT NULL,
CONSTRAINT keydb_server_keys_unique 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, server_key_json FROM keydb_server_keys" +
" WHERE server_name_and_key_id = ANY($1)"
const upsertServerKeysSQL = "" +
"INSERT INTO keydb_server_keys (server_name, server_key_id," +
" server_name_and_key_id, valid_until_ts, server_key_json)" +
" VALUES ($1, $2, $3, $4, $5)" +
" ON CONFLICT ON CONSTRAINT keydb_server_keys_unique" +
" DO UPDATE SET valid_until_ts = $4, server_key_json = $5"
type serverKeyStatements struct {
bulkSelectServerKeysStmt *sql.Stmt
upsertServerKeysStmt *sql.Stmt
}
func (s *serverKeyStatements) prepare(db *sql.DB) (err error) {
_, 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.PublicKeyRequest]gomatrixserverlib.Timestamp,
) (map[gomatrixserverlib.PublicKeyRequest]gomatrixserverlib.ServerKeys, error) {
var nameAndKeyIDs []string
for request := range requests {
nameAndKeyIDs = append(nameAndKeyIDs, nameAndKeyID(request))
}
stmt := s.bulkSelectServerKeysStmt
rows, err := stmt.QueryContext(ctx, pq.StringArray(nameAndKeyIDs))
if err != nil {
return nil, err
}
defer rows.Close() // nolint: errcheck
results := map[gomatrixserverlib.PublicKeyRequest]gomatrixserverlib.ServerKeys{}
for rows.Next() {
var serverName string
var keyID string
var keyJSON []byte
if err := rows.Scan(&serverName, &keyID, &keyJSON); err != nil {
return nil, err
}
var serverKeys gomatrixserverlib.ServerKeys
if err := json.Unmarshal(keyJSON, &serverKeys); err != nil {
return nil, err
}
r := gomatrixserverlib.PublicKeyRequest{
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ServerName: gomatrixserverlib.ServerName(serverName),
KeyID: gomatrixserverlib.KeyID(keyID),
}
results[r] = serverKeys
}
return results, nil
}
func (s *serverKeyStatements) upsertServerKeys(
ctx context.Context,
request gomatrixserverlib.PublicKeyRequest,
keys gomatrixserverlib.ServerKeys,
) error {
keyJSON, err := json.Marshal(keys)
if err != nil {
return err
}
_, err = s.upsertServerKeysStmt.ExecContext(
ctx,
string(request.ServerName),
string(request.KeyID),
nameAndKeyID(request),
int64(keys.ValidUntilTS),
keyJSON,
)
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return err
}
func nameAndKeyID(request gomatrixserverlib.PublicKeyRequest) string {
return string(request.ServerName) + "\x1F" + string(request.KeyID)
}