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// Copyright 2022 The Gogs 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 (
"github.com/pkg/errors"
"gorm.io/gorm"
"gogs.io/gogs/internal/cryptoutil"
)
func migrateAccessTokenToSHA256(db *gorm.DB) error {
return db.Transaction(func(tx *gorm.DB) error {
// 1. Add column without constraints because all rows have NULL values for the
// "sha256" column.
type accessToken struct {
ID int64
Sha1 string
SHA256 string `gorm:"TYPE:VARCHAR(64)"`
}
err := tx.Migrator().AddColumn(&accessToken{}, "SHA256")
if err != nil {
return errors.Wrap(err, "add column")
}
// 2. Generate SHA256 for existing rows from their values in the "sha1" column.
var accessTokens []*accessToken
err = tx.Where("sha256 IS NULL").Find(&accessTokens).Error
if err != nil {
return errors.Wrap(err, "list")
}
for _, t := range accessTokens {
sha256 := cryptoutil.SHA256(t.Sha1)
err = tx.Model(&accessToken{}).Where("id = ?", t.ID).Update("sha256", sha256).Error
if err != nil {
return errors.Wrap(err, "update")
}
}
// 3. We are now safe to apply constraints to the "sha256" column.
type accessTokenWithConstraint struct {
SHA256 string `gorm:"type:VARCHAR(64);unique;not null"`
}
err = tx.Table("access_token").AutoMigrate(&accessTokenWithConstraint{})
if err != nil {
return errors.Wrap(err, "auto migrate")
}
return nil
})
}
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