forgejo/models/token.go
zeripath b8e4ce754e
Only check access tokens if they are likely to be tokens (#16164)
* Only check access tokens if they are likely to be tokens

Gitea will currently check every if every password is an access token even though
most passwords are not and cannot be access tokens.

By creation access tokens are 40 byte hexadecimal strings therefore only these should
be checked.

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-06-16 00:29:25 +02:00

137 lines
3.8 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2019 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 models
import (
"crypto/subtle"
"time"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
gouuid "github.com/google/uuid"
)
// AccessToken represents a personal access token.
type AccessToken struct {
ID int64 `xorm:"pk autoincr"`
UID int64 `xorm:"INDEX"`
Name string
Token string `xorm:"-"`
TokenHash string `xorm:"UNIQUE"` // sha256 of token
TokenSalt string
TokenLastEight string `xorm:"token_last_eight"`
CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
HasRecentActivity bool `xorm:"-"`
HasUsed bool `xorm:"-"`
}
// AfterLoad is invoked from XORM after setting the values of all fields of this object.
func (t *AccessToken) AfterLoad() {
t.HasUsed = t.UpdatedUnix > t.CreatedUnix
t.HasRecentActivity = t.UpdatedUnix.AddDuration(7*24*time.Hour) > timeutil.TimeStampNow()
}
// NewAccessToken creates new access token.
func NewAccessToken(t *AccessToken) error {
salt, err := util.RandomString(10)
if err != nil {
return err
}
t.TokenSalt = salt
t.Token = base.EncodeSha1(gouuid.New().String())
t.TokenHash = hashToken(t.Token, t.TokenSalt)
t.TokenLastEight = t.Token[len(t.Token)-8:]
_, err = x.Insert(t)
return err
}
// GetAccessTokenBySHA returns access token by given token value
func GetAccessTokenBySHA(token string) (*AccessToken, error) {
if token == "" {
return nil, ErrAccessTokenEmpty{}
}
// A token is defined as being SHA1 sum these are 40 hexadecimal bytes long
if len(token) != 40 {
return nil, ErrAccessTokenNotExist{token}
}
for _, x := range []byte(token) {
if x < '0' || (x > '9' && x < 'a') || x > 'f' {
return nil, ErrAccessTokenNotExist{token}
}
}
var tokens []AccessToken
lastEight := token[len(token)-8:]
err := x.Table(&AccessToken{}).Where("token_last_eight = ?", lastEight).Find(&tokens)
if err != nil {
return nil, err
} else if len(tokens) == 0 {
return nil, ErrAccessTokenNotExist{token}
}
for _, t := range tokens {
tempHash := hashToken(token, t.TokenSalt)
if subtle.ConstantTimeCompare([]byte(t.TokenHash), []byte(tempHash)) == 1 {
return &t, nil
}
}
return nil, ErrAccessTokenNotExist{token}
}
// AccessTokenByNameExists checks if a token name has been used already by a user.
func AccessTokenByNameExists(token *AccessToken) (bool, error) {
return x.Table("access_token").Where("name = ?", token.Name).And("uid = ?", token.UID).Exist()
}
// ListAccessTokensOptions contain filter options
type ListAccessTokensOptions struct {
ListOptions
Name string
UserID int64
}
// ListAccessTokens returns a list of access tokens belongs to given user.
func ListAccessTokens(opts ListAccessTokensOptions) ([]*AccessToken, error) {
sess := x.Where("uid=?", opts.UserID)
if len(opts.Name) != 0 {
sess = sess.Where("name=?", opts.Name)
}
sess = sess.Desc("id")
if opts.Page != 0 {
sess = opts.setSessionPagination(sess)
tokens := make([]*AccessToken, 0, opts.PageSize)
return tokens, sess.Find(&tokens)
}
tokens := make([]*AccessToken, 0, 5)
return tokens, sess.Find(&tokens)
}
// UpdateAccessToken updates information of access token.
func UpdateAccessToken(t *AccessToken) error {
_, err := x.ID(t.ID).AllCols().Update(t)
return err
}
// DeleteAccessTokenByID deletes access token by given ID.
func DeleteAccessTokenByID(id, userID int64) error {
cnt, err := x.ID(id).Delete(&AccessToken{
UID: userID,
})
if err != nil {
return err
} else if cnt != 1 {
return ErrAccessTokenNotExist{}
}
return nil
}