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The OAuth spec [defines two types of client](https://datatracker.ietf.org/doc/html/rfc6749#section-2.1), confidential and public. Previously Gitea assumed all clients to be confidential. > OAuth defines two client types, based on their ability to authenticate securely with the authorization server (i.e., ability to > maintain the confidentiality of their client credentials): > > confidential > Clients capable of maintaining the confidentiality of their credentials (e.g., client implemented on a secure server with > restricted access to the client credentials), or capable of secure client authentication using other means. > > **public > Clients incapable of maintaining the confidentiality of their credentials (e.g., clients executing on the device used by the resource owner, such as an installed native application or a web browser-based application), and incapable of secure client authentication via any other means.** > > The client type designation is based on the authorization server's definition of secure authentication and its acceptable exposure levels of client credentials. The authorization server SHOULD NOT make assumptions about the client type. https://datatracker.ietf.org/doc/html/rfc8252#section-8.4 > Authorization servers MUST record the client type in the client registration details in order to identify and process requests accordingly. Require PKCE for public clients: https://datatracker.ietf.org/doc/html/rfc8252#section-8.1 > Authorization servers SHOULD reject authorization requests from native apps that don't use PKCE by returning an error message Fixes #21299 Co-authored-by: wxiaoguang <wxiaoguang@gmail.com> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
578 lines
18 KiB
Go
578 lines
18 KiB
Go
// Copyright 2019 The Gitea 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 auth
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import (
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"context"
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"crypto/sha256"
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"encoding/base32"
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"encoding/base64"
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"fmt"
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"net"
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"net/url"
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"strings"
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"code.gitea.io/gitea/models/db"
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"code.gitea.io/gitea/modules/timeutil"
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"code.gitea.io/gitea/modules/util"
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uuid "github.com/google/uuid"
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"golang.org/x/crypto/bcrypt"
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"xorm.io/builder"
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"xorm.io/xorm"
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)
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// OAuth2Application represents an OAuth2 client (RFC 6749)
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type OAuth2Application struct {
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ID int64 `xorm:"pk autoincr"`
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UID int64 `xorm:"INDEX"`
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Name string
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ClientID string `xorm:"unique"`
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ClientSecret string
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// OAuth defines both Confidential and Public client types
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// https://datatracker.ietf.org/doc/html/rfc6749#section-2.1
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// "Authorization servers MUST record the client type in the client registration details"
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// https://datatracker.ietf.org/doc/html/rfc8252#section-8.4
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ConfidentialClient bool `xorm:"NOT NULL DEFAULT TRUE"`
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RedirectURIs []string `xorm:"redirect_uris JSON TEXT"`
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CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
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UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
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}
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func init() {
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db.RegisterModel(new(OAuth2Application))
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db.RegisterModel(new(OAuth2AuthorizationCode))
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db.RegisterModel(new(OAuth2Grant))
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}
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// TableName sets the table name to `oauth2_application`
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func (app *OAuth2Application) TableName() string {
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return "oauth2_application"
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}
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// PrimaryRedirectURI returns the first redirect uri or an empty string if empty
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func (app *OAuth2Application) PrimaryRedirectURI() string {
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if len(app.RedirectURIs) == 0 {
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return ""
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}
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return app.RedirectURIs[0]
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}
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// ContainsRedirectURI checks if redirectURI is allowed for app
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func (app *OAuth2Application) ContainsRedirectURI(redirectURI string) bool {
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if !app.ConfidentialClient {
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uri, err := url.Parse(redirectURI)
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// ignore port for http loopback uris following https://datatracker.ietf.org/doc/html/rfc8252#section-7.3
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if err == nil && uri.Scheme == "http" && uri.Port() != "" {
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ip := net.ParseIP(uri.Hostname())
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if ip != nil && ip.IsLoopback() {
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// strip port
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uri.Host = uri.Hostname()
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if util.IsStringInSlice(uri.String(), app.RedirectURIs, true) {
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return true
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}
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}
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}
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}
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return util.IsStringInSlice(redirectURI, app.RedirectURIs, true)
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}
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// Base32 characters, but lowercased.
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const lowerBase32Chars = "abcdefghijklmnopqrstuvwxyz234567"
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// base32 encoder that uses lowered characters without padding.
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var base32Lower = base32.NewEncoding(lowerBase32Chars).WithPadding(base32.NoPadding)
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// GenerateClientSecret will generate the client secret and returns the plaintext and saves the hash at the database
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func (app *OAuth2Application) GenerateClientSecret() (string, error) {
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rBytes, err := util.CryptoRandomBytes(32)
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if err != nil {
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return "", err
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}
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// Add a prefix to the base32, this is in order to make it easier
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// for code scanners to grab sensitive tokens.
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clientSecret := "gto_" + base32Lower.EncodeToString(rBytes)
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hashedSecret, err := bcrypt.GenerateFromPassword([]byte(clientSecret), bcrypt.DefaultCost)
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if err != nil {
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return "", err
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}
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app.ClientSecret = string(hashedSecret)
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if _, err := db.GetEngine(db.DefaultContext).ID(app.ID).Cols("client_secret").Update(app); err != nil {
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return "", err
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}
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return clientSecret, nil
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}
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// ValidateClientSecret validates the given secret by the hash saved in database
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func (app *OAuth2Application) ValidateClientSecret(secret []byte) bool {
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return bcrypt.CompareHashAndPassword([]byte(app.ClientSecret), secret) == nil
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}
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// GetGrantByUserID returns a OAuth2Grant by its user and application ID
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func (app *OAuth2Application) GetGrantByUserID(ctx context.Context, userID int64) (grant *OAuth2Grant, err error) {
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grant = new(OAuth2Grant)
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if has, err := db.GetEngine(ctx).Where("user_id = ? AND application_id = ?", userID, app.ID).Get(grant); err != nil {
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return nil, err
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} else if !has {
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return nil, nil
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}
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return grant, nil
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}
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// CreateGrant generates a grant for an user
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func (app *OAuth2Application) CreateGrant(ctx context.Context, userID int64, scope string) (*OAuth2Grant, error) {
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grant := &OAuth2Grant{
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ApplicationID: app.ID,
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UserID: userID,
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Scope: scope,
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}
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err := db.Insert(ctx, grant)
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if err != nil {
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return nil, err
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}
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return grant, nil
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}
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// GetOAuth2ApplicationByClientID returns the oauth2 application with the given client_id. Returns an error if not found.
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func GetOAuth2ApplicationByClientID(ctx context.Context, clientID string) (app *OAuth2Application, err error) {
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app = new(OAuth2Application)
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has, err := db.GetEngine(ctx).Where("client_id = ?", clientID).Get(app)
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if !has {
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return nil, ErrOAuthClientIDInvalid{ClientID: clientID}
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}
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return app, err
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}
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// GetOAuth2ApplicationByID returns the oauth2 application with the given id. Returns an error if not found.
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func GetOAuth2ApplicationByID(ctx context.Context, id int64) (app *OAuth2Application, err error) {
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app = new(OAuth2Application)
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has, err := db.GetEngine(ctx).ID(id).Get(app)
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if err != nil {
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return nil, err
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}
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if !has {
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return nil, ErrOAuthApplicationNotFound{ID: id}
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}
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return app, nil
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}
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// GetOAuth2ApplicationsByUserID returns all oauth2 applications owned by the user
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func GetOAuth2ApplicationsByUserID(ctx context.Context, userID int64) (apps []*OAuth2Application, err error) {
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apps = make([]*OAuth2Application, 0)
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err = db.GetEngine(ctx).Where("uid = ?", userID).Find(&apps)
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return apps, err
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}
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// CreateOAuth2ApplicationOptions holds options to create an oauth2 application
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type CreateOAuth2ApplicationOptions struct {
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Name string
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UserID int64
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ConfidentialClient bool
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RedirectURIs []string
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}
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// CreateOAuth2Application inserts a new oauth2 application
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func CreateOAuth2Application(ctx context.Context, opts CreateOAuth2ApplicationOptions) (*OAuth2Application, error) {
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clientID := uuid.New().String()
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app := &OAuth2Application{
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UID: opts.UserID,
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Name: opts.Name,
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ClientID: clientID,
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RedirectURIs: opts.RedirectURIs,
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ConfidentialClient: opts.ConfidentialClient,
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}
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if err := db.Insert(ctx, app); err != nil {
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return nil, err
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}
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return app, nil
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}
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// UpdateOAuth2ApplicationOptions holds options to update an oauth2 application
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type UpdateOAuth2ApplicationOptions struct {
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ID int64
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Name string
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UserID int64
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ConfidentialClient bool
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RedirectURIs []string
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}
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// UpdateOAuth2Application updates an oauth2 application
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func UpdateOAuth2Application(opts UpdateOAuth2ApplicationOptions) (*OAuth2Application, error) {
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ctx, committer, err := db.TxContext()
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if err != nil {
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return nil, err
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}
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defer committer.Close()
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app, err := GetOAuth2ApplicationByID(ctx, opts.ID)
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if err != nil {
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return nil, err
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}
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if app.UID != opts.UserID {
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return nil, fmt.Errorf("UID mismatch")
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}
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app.Name = opts.Name
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app.RedirectURIs = opts.RedirectURIs
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app.ConfidentialClient = opts.ConfidentialClient
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if err = updateOAuth2Application(ctx, app); err != nil {
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return nil, err
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}
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app.ClientSecret = ""
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return app, committer.Commit()
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}
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func updateOAuth2Application(ctx context.Context, app *OAuth2Application) error {
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if _, err := db.GetEngine(ctx).ID(app.ID).UseBool("confidential_client").Update(app); err != nil {
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return err
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}
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return nil
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}
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func deleteOAuth2Application(ctx context.Context, id, userid int64) error {
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sess := db.GetEngine(ctx)
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// the userid could be 0 if the app is instance-wide
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if deleted, err := sess.Where(builder.Eq{"id": id, "uid": userid}).Delete(&OAuth2Application{}); err != nil {
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return err
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} else if deleted == 0 {
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return ErrOAuthApplicationNotFound{ID: id}
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}
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codes := make([]*OAuth2AuthorizationCode, 0)
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// delete correlating auth codes
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if err := sess.Join("INNER", "oauth2_grant",
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"oauth2_authorization_code.grant_id = oauth2_grant.id AND oauth2_grant.application_id = ?", id).Find(&codes); err != nil {
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return err
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}
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codeIDs := make([]int64, 0, len(codes))
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for _, grant := range codes {
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codeIDs = append(codeIDs, grant.ID)
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}
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if _, err := sess.In("id", codeIDs).Delete(new(OAuth2AuthorizationCode)); err != nil {
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return err
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}
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if _, err := sess.Where("application_id = ?", id).Delete(new(OAuth2Grant)); err != nil {
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return err
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}
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return nil
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}
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// DeleteOAuth2Application deletes the application with the given id and the grants and auth codes related to it. It checks if the userid was the creator of the app.
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func DeleteOAuth2Application(id, userid int64) error {
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ctx, committer, err := db.TxContext()
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if err != nil {
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return err
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}
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defer committer.Close()
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if err := deleteOAuth2Application(ctx, id, userid); err != nil {
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return err
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}
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return committer.Commit()
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}
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// ListOAuth2Applications returns a list of oauth2 applications belongs to given user.
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func ListOAuth2Applications(uid int64, listOptions db.ListOptions) ([]*OAuth2Application, int64, error) {
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sess := db.GetEngine(db.DefaultContext).
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Where("uid=?", uid).
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Desc("id")
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if listOptions.Page != 0 {
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sess = db.SetSessionPagination(sess, &listOptions)
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apps := make([]*OAuth2Application, 0, listOptions.PageSize)
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total, err := sess.FindAndCount(&apps)
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return apps, total, err
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}
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apps := make([]*OAuth2Application, 0, 5)
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total, err := sess.FindAndCount(&apps)
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return apps, total, err
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}
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//////////////////////////////////////////////////////
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// OAuth2AuthorizationCode is a code to obtain an access token in combination with the client secret once. It has a limited lifetime.
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type OAuth2AuthorizationCode struct {
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ID int64 `xorm:"pk autoincr"`
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Grant *OAuth2Grant `xorm:"-"`
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GrantID int64
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Code string `xorm:"INDEX unique"`
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CodeChallenge string
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CodeChallengeMethod string
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RedirectURI string
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ValidUntil timeutil.TimeStamp `xorm:"index"`
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}
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// TableName sets the table name to `oauth2_authorization_code`
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func (code *OAuth2AuthorizationCode) TableName() string {
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return "oauth2_authorization_code"
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}
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// GenerateRedirectURI generates a redirect URI for a successful authorization request. State will be used if not empty.
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func (code *OAuth2AuthorizationCode) GenerateRedirectURI(state string) (redirect *url.URL, err error) {
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if redirect, err = url.Parse(code.RedirectURI); err != nil {
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return
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}
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q := redirect.Query()
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if state != "" {
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q.Set("state", state)
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}
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q.Set("code", code.Code)
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redirect.RawQuery = q.Encode()
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return redirect, err
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}
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// Invalidate deletes the auth code from the database to invalidate this code
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func (code *OAuth2AuthorizationCode) Invalidate(ctx context.Context) error {
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_, err := db.GetEngine(ctx).ID(code.ID).NoAutoCondition().Delete(code)
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return err
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}
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// ValidateCodeChallenge validates the given verifier against the saved code challenge. This is part of the PKCE implementation.
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func (code *OAuth2AuthorizationCode) ValidateCodeChallenge(verifier string) bool {
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switch code.CodeChallengeMethod {
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case "S256":
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// base64url(SHA256(verifier)) see https://tools.ietf.org/html/rfc7636#section-4.6
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h := sha256.Sum256([]byte(verifier))
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hashedVerifier := base64.RawURLEncoding.EncodeToString(h[:])
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return hashedVerifier == code.CodeChallenge
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case "plain":
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return verifier == code.CodeChallenge
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case "":
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return true
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default:
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// unsupported method -> return false
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return false
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}
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}
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// GetOAuth2AuthorizationByCode returns an authorization by its code
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func GetOAuth2AuthorizationByCode(ctx context.Context, code string) (auth *OAuth2AuthorizationCode, err error) {
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auth = new(OAuth2AuthorizationCode)
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if has, err := db.GetEngine(ctx).Where("code = ?", code).Get(auth); err != nil {
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return nil, err
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} else if !has {
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return nil, nil
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}
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auth.Grant = new(OAuth2Grant)
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if has, err := db.GetEngine(ctx).ID(auth.GrantID).Get(auth.Grant); err != nil {
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return nil, err
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} else if !has {
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return nil, nil
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}
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return auth, nil
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}
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//////////////////////////////////////////////////////
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// OAuth2Grant represents the permission of an user for a specific application to access resources
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type OAuth2Grant struct {
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ID int64 `xorm:"pk autoincr"`
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UserID int64 `xorm:"INDEX unique(user_application)"`
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Application *OAuth2Application `xorm:"-"`
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ApplicationID int64 `xorm:"INDEX unique(user_application)"`
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Counter int64 `xorm:"NOT NULL DEFAULT 1"`
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Scope string `xorm:"TEXT"`
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Nonce string `xorm:"TEXT"`
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CreatedUnix timeutil.TimeStamp `xorm:"created"`
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UpdatedUnix timeutil.TimeStamp `xorm:"updated"`
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}
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// TableName sets the table name to `oauth2_grant`
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func (grant *OAuth2Grant) TableName() string {
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return "oauth2_grant"
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}
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// GenerateNewAuthorizationCode generates a new authorization code for a grant and saves it to the database
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func (grant *OAuth2Grant) GenerateNewAuthorizationCode(ctx context.Context, redirectURI, codeChallenge, codeChallengeMethod string) (code *OAuth2AuthorizationCode, err error) {
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rBytes, err := util.CryptoRandomBytes(32)
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if err != nil {
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return &OAuth2AuthorizationCode{}, err
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}
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// Add a prefix to the base32, this is in order to make it easier
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// for code scanners to grab sensitive tokens.
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codeSecret := "gta_" + base32Lower.EncodeToString(rBytes)
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code = &OAuth2AuthorizationCode{
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Grant: grant,
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GrantID: grant.ID,
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RedirectURI: redirectURI,
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Code: codeSecret,
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CodeChallenge: codeChallenge,
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CodeChallengeMethod: codeChallengeMethod,
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}
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if err := db.Insert(ctx, code); err != nil {
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return nil, err
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}
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return code, nil
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}
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// IncreaseCounter increases the counter and updates the grant
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func (grant *OAuth2Grant) IncreaseCounter(ctx context.Context) error {
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_, err := db.GetEngine(ctx).ID(grant.ID).Incr("counter").Update(new(OAuth2Grant))
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if err != nil {
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return err
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}
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updatedGrant, err := GetOAuth2GrantByID(ctx, grant.ID)
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if err != nil {
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return err
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}
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grant.Counter = updatedGrant.Counter
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return nil
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}
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// ScopeContains returns true if the grant scope contains the specified scope
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func (grant *OAuth2Grant) ScopeContains(scope string) bool {
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for _, currentScope := range strings.Split(grant.Scope, " ") {
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if scope == currentScope {
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return true
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}
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}
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return false
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}
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// SetNonce updates the current nonce value of a grant
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func (grant *OAuth2Grant) SetNonce(ctx context.Context, nonce string) error {
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grant.Nonce = nonce
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_, err := db.GetEngine(ctx).ID(grant.ID).Cols("nonce").Update(grant)
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if err != nil {
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return err
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}
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return nil
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}
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// GetOAuth2GrantByID returns the grant with the given ID
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func GetOAuth2GrantByID(ctx context.Context, id int64) (grant *OAuth2Grant, err error) {
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grant = new(OAuth2Grant)
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if has, err := db.GetEngine(ctx).ID(id).Get(grant); err != nil {
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return nil, err
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} else if !has {
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return nil, nil
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}
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return grant, err
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}
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// GetOAuth2GrantsByUserID lists all grants of a certain user
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func GetOAuth2GrantsByUserID(ctx context.Context, uid int64) ([]*OAuth2Grant, error) {
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type joinedOAuth2Grant struct {
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Grant *OAuth2Grant `xorm:"extends"`
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Application *OAuth2Application `xorm:"extends"`
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}
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var results *xorm.Rows
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var err error
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|
if results, err = db.GetEngine(ctx).
|
|
Table("oauth2_grant").
|
|
Where("user_id = ?", uid).
|
|
Join("INNER", "oauth2_application", "application_id = oauth2_application.id").
|
|
Rows(new(joinedOAuth2Grant)); err != nil {
|
|
return nil, err
|
|
}
|
|
defer results.Close()
|
|
grants := make([]*OAuth2Grant, 0)
|
|
for results.Next() {
|
|
joinedGrant := new(joinedOAuth2Grant)
|
|
if err := results.Scan(joinedGrant); err != nil {
|
|
return nil, err
|
|
}
|
|
joinedGrant.Grant.Application = joinedGrant.Application
|
|
grants = append(grants, joinedGrant.Grant)
|
|
}
|
|
return grants, nil
|
|
}
|
|
|
|
// RevokeOAuth2Grant deletes the grant with grantID and userID
|
|
func RevokeOAuth2Grant(ctx context.Context, grantID, userID int64) error {
|
|
_, err := db.GetEngine(ctx).Where(builder.Eq{"id": grantID, "user_id": userID}).Delete(&OAuth2Grant{})
|
|
return err
|
|
}
|
|
|
|
// ErrOAuthClientIDInvalid will be thrown if client id cannot be found
|
|
type ErrOAuthClientIDInvalid struct {
|
|
ClientID string
|
|
}
|
|
|
|
// IsErrOauthClientIDInvalid checks if an error is a ErrOAuthClientIDInvalid.
|
|
func IsErrOauthClientIDInvalid(err error) bool {
|
|
_, ok := err.(ErrOAuthClientIDInvalid)
|
|
return ok
|
|
}
|
|
|
|
// Error returns the error message
|
|
func (err ErrOAuthClientIDInvalid) Error() string {
|
|
return fmt.Sprintf("Client ID invalid [Client ID: %s]", err.ClientID)
|
|
}
|
|
|
|
// Unwrap unwraps this as a ErrNotExist err
|
|
func (err ErrOAuthClientIDInvalid) Unwrap() error {
|
|
return util.ErrNotExist
|
|
}
|
|
|
|
// ErrOAuthApplicationNotFound will be thrown if id cannot be found
|
|
type ErrOAuthApplicationNotFound struct {
|
|
ID int64
|
|
}
|
|
|
|
// IsErrOAuthApplicationNotFound checks if an error is a ErrReviewNotExist.
|
|
func IsErrOAuthApplicationNotFound(err error) bool {
|
|
_, ok := err.(ErrOAuthApplicationNotFound)
|
|
return ok
|
|
}
|
|
|
|
// Error returns the error message
|
|
func (err ErrOAuthApplicationNotFound) Error() string {
|
|
return fmt.Sprintf("OAuth application not found [ID: %d]", err.ID)
|
|
}
|
|
|
|
// Unwrap unwraps this as a ErrNotExist err
|
|
func (err ErrOAuthApplicationNotFound) Unwrap() error {
|
|
return util.ErrNotExist
|
|
}
|
|
|
|
// GetActiveOAuth2ProviderSources returns all actived LoginOAuth2 sources
|
|
func GetActiveOAuth2ProviderSources() ([]*Source, error) {
|
|
sources := make([]*Source, 0, 1)
|
|
if err := db.GetEngine(db.DefaultContext).Where("is_active = ? and type = ?", true, OAuth2).Find(&sources); err != nil {
|
|
return nil, err
|
|
}
|
|
return sources, nil
|
|
}
|
|
|
|
// GetActiveOAuth2SourceByName returns a OAuth2 AuthSource based on the given name
|
|
func GetActiveOAuth2SourceByName(name string) (*Source, error) {
|
|
authSource := new(Source)
|
|
has, err := db.GetEngine(db.DefaultContext).Where("name = ? and type = ? and is_active = ?", name, OAuth2, true).Get(authSource)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if !has {
|
|
return nil, fmt.Errorf("oauth2 source not found, name: %q", name)
|
|
}
|
|
|
|
return authSource, nil
|
|
}
|
|
|
|
func DeleteOAuth2RelictsByUserID(ctx context.Context, userID int64) error {
|
|
deleteCond := builder.Select("id").From("oauth2_grant").Where(builder.Eq{"oauth2_grant.user_id": userID})
|
|
|
|
if _, err := db.GetEngine(ctx).In("grant_id", deleteCond).
|
|
Delete(&OAuth2AuthorizationCode{}); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := db.DeleteBeans(ctx,
|
|
&OAuth2Application{UID: userID},
|
|
&OAuth2Grant{UserID: userID},
|
|
); err != nil {
|
|
return fmt.Errorf("DeleteBeans: %v", err)
|
|
}
|
|
|
|
return nil
|
|
}
|