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forgejo/modules/auth/sso/oauth2.go
zeripath a2df265476
Add trace logging to SSO methods ()
It is currenly impossible to detect which "SSO" method is responsible for login. This
PR adds some basic trace logging to these methods.

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-05-09 18:04:53 +02:00

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