mirror of https://github.com/gogs/gogs.git
92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
// Copyright 2023 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package database
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import (
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"os"
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"path/filepath"
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"github.com/pkg/errors"
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"gorm.io/gorm"
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"gogs.io/gogs/internal/conf"
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"gogs.io/gogs/internal/osutil"
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)
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// PublicKeysStore is the storage layer for public keys.
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type PublicKeysStore struct {
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db *gorm.DB
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}
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func newPublicKeysStore(db *gorm.DB) *PublicKeysStore {
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return &PublicKeysStore{db: db}
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}
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func authorizedKeysPath() string {
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return filepath.Join(conf.SSH.RootPath, "authorized_keys")
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}
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// RewriteAuthorizedKeys rewrites the "authorized_keys" file under the SSH root
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// path with all public keys stored in the database.
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func (s *PublicKeysStore) RewriteAuthorizedKeys() error {
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sshOpLocker.Lock()
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defer sshOpLocker.Unlock()
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err := os.MkdirAll(conf.SSH.RootPath, os.ModePerm)
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if err != nil {
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return errors.Wrap(err, "create SSH root path")
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}
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fpath := authorizedKeysPath()
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tempPath := fpath + ".tmp"
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f, err := os.OpenFile(tempPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
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if err != nil {
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return errors.Wrap(err, "create temporary file")
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}
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defer func() {
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_ = f.Close()
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_ = os.Remove(tempPath)
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}()
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// NOTE: More recently updated keys are more likely to be used more frequently,
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// putting them in the earlier lines could speed up the key lookup by SSHD.
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rows, err := s.db.Model(&PublicKey{}).Order("updated_unix DESC").Rows()
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if err != nil {
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return errors.Wrap(err, "iterate public keys")
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}
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defer func() { _ = rows.Close() }()
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for rows.Next() {
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var key PublicKey
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err = s.db.ScanRows(rows, &key)
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if err != nil {
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return errors.Wrap(err, "scan rows")
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}
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_, err = f.WriteString(key.AuthorizedString())
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if err != nil {
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return errors.Wrapf(err, "write key %d", key.ID)
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}
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}
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if err = rows.Err(); err != nil {
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return errors.Wrap(err, "check rows.Err")
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}
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err = f.Close()
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if err != nil {
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return errors.Wrap(err, "close temporary file")
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}
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if osutil.IsExist(fpath) {
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err = os.Remove(fpath)
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if err != nil {
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return errors.Wrap(err, "remove")
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}
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}
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err = os.Rename(tempPath, fpath)
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if err != nil {
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return errors.Wrap(err, "rename")
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}
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return nil
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}
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