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forgejo/models/migrations/v210.go
zeripath 886b1de949
Update the webauthn_credential_id_sequence in Postgres (#19048)
* Update the webauthn_credential_id_sequence in Postgres

There is (yet) another problem with v210 in that Postgres will silently allow preset
ID insertions ... but it will not update the sequence value.

This PR simply adds a little step to the end of the v210 migration to update the
sequence number.

Users who have already migrated who find that they cannot insert new
webauthn_credentials into the DB can either run:

```bash
gitea doctor recreate-table webauthn_credential
```

or

```bash
./gitea doctor --run=check-db-consistency --fix
```

which will fix the bad sequence.

Fix #19012

Signed-off-by: Andrew Thornton <art27@cantab.net>
2022-03-10 23:04:55 +01:00

184 lines
5.2 KiB
Go

// Copyright 2022 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package migrations
import (
"crypto/elliptic"
"encoding/base32"
"fmt"
"strings"
"code.gitea.io/gitea/modules/timeutil"
"github.com/tstranex/u2f"
"xorm.io/xorm"
"xorm.io/xorm/schemas"
)
// v208 migration was completely broken
func remigrateU2FCredentials(x *xorm.Engine) error {
// Create webauthnCredential table
type webauthnCredential struct {
ID int64 `xorm:"pk autoincr"`
Name string
LowerName string `xorm:"unique(s)"`
UserID int64 `xorm:"INDEX unique(s)"`
CredentialID string `xorm:"INDEX VARCHAR(410)"` // CredentalID in U2F is at most 255bytes / 5 * 8 = 408 - add a few extra characters for safety
PublicKey []byte
AttestationType string
AAGUID []byte
SignCount uint32 `xorm:"BIGINT"`
CloneWarning bool
CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
}
if err := x.Sync2(&webauthnCredential{}); err != nil {
return err
}
switch x.Dialect().URI().DBType {
case schemas.MYSQL:
_, err := x.Exec("ALTER TABLE webauthn_credential MODIFY COLUMN credential_id VARCHAR(410)")
if err != nil {
return err
}
case schemas.ORACLE:
_, err := x.Exec("ALTER TABLE webauthn_credential MODIFY credential_id VARCHAR(410)")
if err != nil {
return err
}
case schemas.MSSQL:
// This column has an index on it. I could write all of the code to attempt to change the index OR
// I could just use recreate table.
sess := x.NewSession()
if err := sess.Begin(); err != nil {
_ = sess.Close()
return err
}
if err := recreateTable(sess, new(webauthnCredential)); err != nil {
_ = sess.Close()
return err
}
if err := sess.Commit(); err != nil {
_ = sess.Close()
return err
}
if err := sess.Close(); err != nil {
return err
}
case schemas.POSTGRES:
_, err := x.Exec("ALTER TABLE webauthn_credential ALTER COLUMN credential_id TYPE VARCHAR(410)")
if err != nil {
return err
}
default:
// SQLite doesn't support ALTER COLUMN, and it already makes String _TEXT_ by default so no migration needed
// nor is there any need to re-migrate
}
exist, err := x.IsTableExist("u2f_registration")
if err != nil {
return err
}
if !exist {
return nil
}
// Now migrate the old u2f registrations to the new format
type u2fRegistration struct {
ID int64 `xorm:"pk autoincr"`
Name string
UserID int64 `xorm:"INDEX"`
Raw []byte
Counter uint32 `xorm:"BIGINT"`
CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
}
var start int
regs := make([]*u2fRegistration, 0, 50)
for {
err := x.OrderBy("id").Limit(50, start).Find(&regs)
if err != nil {
return err
}
err = func() error {
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
return fmt.Errorf("unable to allow start session. Error: %w", err)
}
if x.Dialect().URI().DBType == schemas.MSSQL {
if _, err := sess.Exec("SET IDENTITY_INSERT `webauthn_credential` ON"); err != nil {
return fmt.Errorf("unable to allow identity insert on webauthn_credential. Error: %w", err)
}
}
for _, reg := range regs {
parsed := new(u2f.Registration)
err = parsed.UnmarshalBinary(reg.Raw)
if err != nil {
continue
}
remigrated := &webauthnCredential{
ID: reg.ID,
Name: reg.Name,
LowerName: strings.ToLower(reg.Name),
UserID: reg.UserID,
CredentialID: base32.HexEncoding.EncodeToString(parsed.KeyHandle),
PublicKey: elliptic.Marshal(elliptic.P256(), parsed.PubKey.X, parsed.PubKey.Y),
AttestationType: "fido-u2f",
AAGUID: []byte{},
SignCount: reg.Counter,
UpdatedUnix: reg.UpdatedUnix,
CreatedUnix: reg.CreatedUnix,
}
has, err := sess.ID(reg.ID).Get(new(webauthnCredential))
if err != nil {
return fmt.Errorf("unable to get webauthn_credential[%d]. Error: %w", reg.ID, err)
}
if !has {
has, err := sess.Where("`lower_name`=?", remigrated.LowerName).And("`user_id`=?", remigrated.UserID).Exist(new(webauthnCredential))
if err != nil {
return fmt.Errorf("unable to check webauthn_credential[lower_name: %s, user_id:%v]. Error: %w", remigrated.LowerName, remigrated.UserID, err)
}
if !has {
_, err = sess.Insert(remigrated)
if err != nil {
return fmt.Errorf("unable to (re)insert webauthn_credential[%d]. Error: %w", reg.ID, err)
}
continue
}
}
_, err = sess.ID(remigrated.ID).AllCols().Update(remigrated)
if err != nil {
return fmt.Errorf("unable to update webauthn_credential[%d]. Error: %w", reg.ID, err)
}
}
return sess.Commit()
}()
if err != nil {
return err
}
if len(regs) < 50 {
break
}
start += 50
regs = regs[:0]
}
if x.Dialect().URI().DBType == schemas.POSTGRES {
if _, err := x.Exec("SELECT setval('webauthn_credential_id_seq', COALESCE((SELECT MAX(id)+1 FROM `webauthn_credential`), 1), false)"); err != nil {
return err
}
}
return nil
}