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// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package auth
import (
"context"
"crypto/subtle"
"encoding/hex"
"fmt"
"time"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
lru "github.com/hashicorp/golang-lru/v2"
"xorm.io/builder"
)
// ErrAccessTokenNotExist represents a "AccessTokenNotExist" kind of error.
type ErrAccessTokenNotExist struct {
Token string
}
// IsErrAccessTokenNotExist checks if an error is a ErrAccessTokenNotExist.
func IsErrAccessTokenNotExist(err error) bool {
_, ok := err.(ErrAccessTokenNotExist)
return ok
}
func (err ErrAccessTokenNotExist) Error() string {
return fmt.Sprintf("access token does not exist [sha: %s]", err.Token)
}
func (err ErrAccessTokenNotExist) Unwrap() error {
return util.ErrNotExist
}
// ErrAccessTokenEmpty represents a "AccessTokenEmpty" kind of error.
type ErrAccessTokenEmpty struct{}
// IsErrAccessTokenEmpty checks if an error is a ErrAccessTokenEmpty.
func IsErrAccessTokenEmpty(err error) bool {
_, ok := err.(ErrAccessTokenEmpty)
return ok
}
func (err ErrAccessTokenEmpty) Error() string {
return "access token is empty"
}
func (err ErrAccessTokenEmpty) Unwrap() error {
return util.ErrInvalidArgument
}
var successfulAccessTokenCache *lru.Cache[string, any]
// 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:"INDEX token_last_eight"`
Scope AccessTokenScope
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()
}
func init() {
db.RegisterModel(new(AccessToken), func() error {
if setting.SuccessfulTokensCacheSize > 0 {
var err error
successfulAccessTokenCache, err = lru.New[string, any](setting.SuccessfulTokensCacheSize)
if err != nil {
return fmt.Errorf("unable to allocate AccessToken cache: %w", err)
}
} else {
successfulAccessTokenCache = nil
}
return nil
})
}
// NewAccessToken creates new access token.
func NewAccessToken(ctx context.Context, t *AccessToken) error {
salt, err := util.CryptoRandomString(10)
if err != nil {
return err
}
token, err := util.CryptoRandomBytes(20)
if err != nil {
return err
}
t.TokenSalt = salt
t.Token = hex.EncodeToString(token)
t.TokenHash = HashToken(t.Token, t.TokenSalt)
t.TokenLastEight = t.Token[len(t.Token)-8:]
_, err = db.GetEngine(ctx).Insert(t)
return err
}
// DisplayPublicOnly whether to display this as a public-only token.
func (t *AccessToken) DisplayPublicOnly() bool {
publicOnly, err := t.Scope.PublicOnly()
if err != nil {
return false
}
return publicOnly
}
func getAccessTokenIDFromCache(token string) int64 {
if successfulAccessTokenCache == nil {
return 0
}
tInterface, ok := successfulAccessTokenCache.Get(token)
if !ok {
return 0
}
t, ok := tInterface.(int64)
if !ok {
return 0
}
return t
}
// GetAccessTokenBySHA returns access token by given token value
func GetAccessTokenBySHA(ctx context.Context, 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}
}
}
lastEight := token[len(token)-8:]
if id := getAccessTokenIDFromCache(token); id > 0 {
accessToken := &AccessToken{
TokenLastEight: lastEight,
}
// Re-get the token from the db in case it has been deleted in the intervening period
has, err := db.GetEngine(ctx).ID(id).Get(accessToken)
if err != nil {
return nil, err
}
if has {
return accessToken, nil
}
successfulAccessTokenCache.Remove(token)
}
var tokens []AccessToken
err := db.GetEngine(ctx).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 {
if successfulAccessTokenCache != nil {
successfulAccessTokenCache.Add(token, t.ID)
}
return &t, nil
}
}
return nil, ErrAccessTokenNotExist{token}
}
// AccessTokenByNameExists checks if a token name has been used already by a user.
func AccessTokenByNameExists(ctx context.Context, token *AccessToken) (bool, error) {
return db.GetEngine(ctx).Table("access_token").Where("name = ?", token.Name).And("uid = ?", token.UID).Exist()
}
// ListAccessTokensOptions contain filter options
type ListAccessTokensOptions struct {
db.ListOptions
Name string
UserID int64
}
func (opts ListAccessTokensOptions) ToConds() builder.Cond {
cond := builder.NewCond()
// user id is required, otherwise it will return all result which maybe a possible bug
cond = cond.And(builder.Eq{"uid": opts.UserID})
if len(opts.Name) > 0 {
cond = cond.And(builder.Eq{"name": opts.Name})
}
return cond
}
func (opts ListAccessTokensOptions) ToOrders() string {
return "created_unix DESC"
}
// UpdateAccessToken updates information of access token.
func UpdateAccessToken(ctx context.Context, t *AccessToken) error {
_, err := db.GetEngine(ctx).ID(t.ID).AllCols().Update(t)
return err
}
// DeleteAccessTokenByID deletes access token by given ID.
func DeleteAccessTokenByID(ctx context.Context, id, userID int64) error {
cnt, err := db.GetEngine(ctx).ID(id).Delete(&AccessToken{
UID: userID,
})
if err != nil {
return err
} else if cnt != 1 {
return ErrAccessTokenNotExist{}
}
return nil
}
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