143 lines
3.7 KiB
Go
143 lines
3.7 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// 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 sso
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import (
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"net/http"
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"strings"
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"time"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/timeutil"
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"code.gitea.io/gitea/modules/web/middleware"
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)
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// Ensure the struct implements the interface.
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var (
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_ SingleSignOn = &OAuth2{}
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)
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// CheckOAuthAccessToken returns uid of user from oauth token
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func CheckOAuthAccessToken(accessToken string) int64 {
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// JWT tokens require a "."
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if !strings.Contains(accessToken, ".") {
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return 0
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}
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token, err := models.ParseOAuth2Token(accessToken)
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if err != nil {
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log.Trace("ParseOAuth2Token: %v", err)
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return 0
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}
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var grant *models.OAuth2Grant
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if grant, err = models.GetOAuth2GrantByID(token.GrantID); err != nil || grant == nil {
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return 0
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}
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if token.Type != models.TypeAccessToken {
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return 0
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}
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if token.ExpiresAt < time.Now().Unix() || token.IssuedAt > time.Now().Unix() {
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return 0
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}
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return grant.UserID
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}
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// OAuth2 implements the SingleSignOn interface and authenticates requests
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// (API requests only) by looking for an OAuth token in query parameters or the
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// "Authorization" header.
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type OAuth2 struct {
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}
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// Init does nothing as the OAuth2 implementation does not need to allocate any resources
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func (o *OAuth2) Init() error {
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return nil
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}
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// Free does nothing as the OAuth2 implementation does not have to release any resources
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func (o *OAuth2) Free() error {
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return nil
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}
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// userIDFromToken returns the user id corresponding to the OAuth token.
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func (o *OAuth2) userIDFromToken(req *http.Request, store DataStore) int64 {
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_ = req.ParseForm()
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// Check access token.
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tokenSHA := req.Form.Get("token")
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if len(tokenSHA) == 0 {
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tokenSHA = req.Form.Get("access_token")
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}
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if len(tokenSHA) == 0 {
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// Well, check with header again.
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auHead := req.Header.Get("Authorization")
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if len(auHead) > 0 {
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auths := strings.Fields(auHead)
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if len(auths) == 2 && (auths[0] == "token" || strings.ToLower(auths[0]) == "bearer") {
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tokenSHA = auths[1]
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}
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}
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}
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if len(tokenSHA) == 0 {
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return 0
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}
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// Let's see if token is valid.
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if strings.Contains(tokenSHA, ".") {
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uid := CheckOAuthAccessToken(tokenSHA)
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if uid != 0 {
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store.GetData()["IsApiToken"] = true
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}
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return uid
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}
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t, err := models.GetAccessTokenBySHA(tokenSHA)
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if err != nil {
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if !models.IsErrAccessTokenNotExist(err) && !models.IsErrAccessTokenEmpty(err) {
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log.Error("GetAccessTokenBySHA: %v", err)
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}
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return 0
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}
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t.UpdatedUnix = timeutil.TimeStampNow()
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if err = models.UpdateAccessToken(t); err != nil {
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log.Error("UpdateAccessToken: %v", err)
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}
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store.GetData()["IsApiToken"] = true
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return t.UID
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}
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// IsEnabled returns true as this plugin is enabled by default and its not possible
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// to disable it from settings.
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func (o *OAuth2) IsEnabled() bool {
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return true
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}
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// VerifyAuthData extracts the user ID from the OAuth token in the query parameters
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// or the "Authorization" header and returns the corresponding user object for that ID.
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// If verification is successful returns an existing user object.
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// Returns nil if verification fails.
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func (o *OAuth2) VerifyAuthData(req *http.Request, w http.ResponseWriter, store DataStore, sess SessionStore) *models.User {
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if !models.HasEngine {
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return nil
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}
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if middleware.IsInternalPath(req) || !middleware.IsAPIPath(req) && !isAttachmentDownload(req) {
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return nil
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}
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id := o.userIDFromToken(req, store)
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if id <= 0 {
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return nil
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}
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user, err := models.GetUserByID(id)
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if err != nil {
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if !models.IsErrUserNotExist(err) {
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log.Error("GetUserByName: %v", err)
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}
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return nil
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}
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return user
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}
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