dendrite/federationsender/storage/sqlite3/notary_server_keys_metadata...

170 lines
6.3 KiB
Go

// Copyright 2021 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"
"encoding/json"
"fmt"
"strings"
"github.com/matrix-org/dendrite/federationsender/storage/tables"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
const notaryServerKeysMetadataSchema = `
CREATE TABLE IF NOT EXISTS federationsender_notary_server_keys_metadata (
notary_id BIGINT NOT NULL,
server_name TEXT NOT NULL,
key_id TEXT NOT NULL,
UNIQUE (server_name, key_id)
);
`
const upsertServerKeysSQL = "" +
"INSERT INTO federationsender_notary_server_keys_metadata (notary_id, server_name, key_id) VALUES ($1, $2, $3)" +
" ON CONFLICT (server_name, key_id) DO UPDATE SET notary_id = $1"
// for a given (server_name, key_id), find the existing notary ID and valid until. Used to check if we will replace it
// JOINs with the json table
const selectNotaryKeyMetadataSQL = `
SELECT federationsender_notary_server_keys_metadata.notary_id, valid_until FROM federationsender_notary_server_keys_json
JOIN federationsender_notary_server_keys_metadata ON
federationsender_notary_server_keys_metadata.notary_id = federationsender_notary_server_keys_json.notary_id
WHERE federationsender_notary_server_keys_metadata.server_name = $1 AND federationsender_notary_server_keys_metadata.key_id = $2
`
// select the response which has the highest valid_until value
// JOINs with the json table
const selectNotaryKeyResponsesSQL = `
SELECT response_json FROM federationsender_notary_server_keys_json
WHERE server_name = $1 AND valid_until = (
SELECT MAX(valid_until) FROM federationsender_notary_server_keys_json WHERE server_name = $1
)
`
// select the responses which have the given key IDs
// JOINs with the json table
const selectNotaryKeyResponsesWithKeyIDsSQL = `
SELECT response_json FROM federationsender_notary_server_keys_json
JOIN federationsender_notary_server_keys_metadata ON
federationsender_notary_server_keys_metadata.notary_id = federationsender_notary_server_keys_json.notary_id
WHERE federationsender_notary_server_keys_json.server_name = $1 AND federationsender_notary_server_keys_metadata.key_id IN ($2)
GROUP BY federationsender_notary_server_keys_json.notary_id
`
// JOINs with the metadata table
const deleteUnusedServerKeysJSONSQL = `
DELETE FROM federationsender_notary_server_keys_json WHERE federationsender_notary_server_keys_json.notary_id NOT IN (
SELECT DISTINCT notary_id FROM federationsender_notary_server_keys_metadata
)
`
type notaryServerKeysMetadataStatements struct {
db *sql.DB
upsertServerKeysStmt *sql.Stmt
selectNotaryKeyResponsesStmt *sql.Stmt
selectNotaryKeyMetadataStmt *sql.Stmt
deleteUnusedServerKeysJSONStmt *sql.Stmt
}
func NewSQLiteNotaryServerKeysMetadataTable(db *sql.DB) (s *notaryServerKeysMetadataStatements, err error) {
s = &notaryServerKeysMetadataStatements{
db: db,
}
_, err = db.Exec(notaryServerKeysMetadataSchema)
if err != nil {
return
}
if s.upsertServerKeysStmt, err = db.Prepare(upsertServerKeysSQL); err != nil {
return
}
if s.selectNotaryKeyResponsesStmt, err = db.Prepare(selectNotaryKeyResponsesSQL); err != nil {
return
}
if s.selectNotaryKeyMetadataStmt, err = db.Prepare(selectNotaryKeyMetadataSQL); err != nil {
return
}
if s.deleteUnusedServerKeysJSONStmt, err = db.Prepare(deleteUnusedServerKeysJSONSQL); err != nil {
return
}
return
}
func (s *notaryServerKeysMetadataStatements) UpsertKey(
ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, keyID gomatrixserverlib.KeyID, newNotaryID tables.NotaryID, newValidUntil gomatrixserverlib.Timestamp,
) (tables.NotaryID, error) {
notaryID := newNotaryID
// see if the existing notary ID a) exists, b) has a longer valid_until
var existingNotaryID tables.NotaryID
var existingValidUntil gomatrixserverlib.Timestamp
if err := txn.Stmt(s.selectNotaryKeyMetadataStmt).QueryRowContext(ctx, serverName, keyID).Scan(&existingNotaryID, &existingValidUntil); err != nil {
if err != sql.ErrNoRows {
return 0, err
}
}
if existingValidUntil.Time().After(newValidUntil.Time()) {
// the existing valid_until is valid longer, so use that.
return existingNotaryID, nil
}
// overwrite the notary_id for this (server_name, key_id) tuple
_, err := txn.Stmt(s.upsertServerKeysStmt).ExecContext(ctx, notaryID, serverName, keyID)
return notaryID, err
}
func (s *notaryServerKeysMetadataStatements) SelectKeys(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, keyIDs []gomatrixserverlib.KeyID) ([]gomatrixserverlib.ServerKeys, error) {
var rows *sql.Rows
var err error
if len(keyIDs) == 0 {
rows, err = txn.Stmt(s.selectNotaryKeyResponsesStmt).QueryContext(ctx, string(serverName))
} else {
iKeyIDs := make([]interface{}, len(keyIDs)+1)
iKeyIDs[0] = serverName
for i := range keyIDs {
iKeyIDs[i+1] = string(keyIDs[i])
}
sql := strings.Replace(selectNotaryKeyResponsesWithKeyIDsSQL, "($2)", sqlutil.QueryVariadicOffset(len(keyIDs), 1), 1)
fmt.Println(sql)
fmt.Println(iKeyIDs...)
rows, err = s.db.QueryContext(ctx, sql, iKeyIDs...)
}
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectNotaryKeyResponsesStmt close failed")
var results []gomatrixserverlib.ServerKeys
for rows.Next() {
var sk gomatrixserverlib.ServerKeys
var raw string
if err = rows.Scan(&raw); err != nil {
return nil, err
}
if err = json.Unmarshal([]byte(raw), &sk); err != nil {
return nil, err
}
results = append(results, sk)
}
return results, nil
}
func (s *notaryServerKeysMetadataStatements) DeleteOldJSONResponses(ctx context.Context, txn *sql.Tx) error {
_, err := txn.Stmt(s.deleteUnusedServerKeysJSONStmt).ExecContext(ctx)
return err
}