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This PR adds the support for scopes of access tokens, mimicking the design of GitHub OAuth scopes. The changes of the core logic are in `models/auth` that `AccessToken` struct will have a `Scope` field. The normalized (no duplication of scope), comma-separated scope string will be stored in `access_token` table in the database. In `services/auth`, the scope will be stored in context, which will be used by `reqToken` middleware in API calls. Only OAuth2 tokens will have granular token scopes, while others like BasicAuth will default to scope `all`. A large amount of work happens in `routers/api/v1/api.go` and the corresponding `tests/integration` tests, that is adding necessary scopes to each of the API calls as they fit. - [x] Add `Scope` field to `AccessToken` - [x] Add access control to all API endpoints - [x] Update frontend & backend for when creating tokens - [x] Add a database migration for `scope` column (enable 'all' access to past tokens) I'm aiming to complete it before Gitea 1.19 release. Fixes #4300
147 lines
4.1 KiB
Go
147 lines
4.1 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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// SPDX-License-Identifier: MIT
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package auth
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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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auth_model "code.gitea.io/gitea/models/auth"
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"code.gitea.io/gitea/models/db"
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user_model "code.gitea.io/gitea/models/user"
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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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"code.gitea.io/gitea/services/auth/source/oauth2"
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)
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// Ensure the struct implements the interface.
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var (
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_ Method = &OAuth2{}
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_ Named = &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 := oauth2.ParseToken(accessToken, oauth2.DefaultSigningKey)
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if err != nil {
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log.Trace("oauth2.ParseToken: %v", err)
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return 0
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}
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var grant *auth_model.OAuth2Grant
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if grant, err = auth_model.GetOAuth2GrantByID(db.DefaultContext, token.GrantID); err != nil || grant == nil {
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return 0
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}
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if token.Type != oauth2.TypeAccessToken {
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return 0
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}
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if token.ExpiresAt.Before(time.Now()) || token.IssuedAt.After(time.Now()) {
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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 Auth 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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// Name represents the name of auth method
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func (o *OAuth2) Name() string {
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return "oauth2"
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}
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// userIDFromToken returns the user id corresponding to the OAuth token.
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// It will set 'IsApiToken' to true if the token is an API token and
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// set 'ApiTokenScope' to the scope of the access 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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store.GetData()["ApiTokenScope"] = auth_model.AccessTokenScopeAll // fallback to all
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}
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return uid
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}
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t, err := auth_model.GetAccessTokenBySHA(tokenSHA)
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if err != nil {
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if !auth_model.IsErrAccessTokenNotExist(err) && !auth_model.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 = auth_model.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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store.GetData()["ApiTokenScope"] = t.Scope
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return t.UID
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}
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// Verify 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) Verify(req *http.Request, w http.ResponseWriter, store DataStore, sess SessionStore) (*user_model.User, error) {
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if !middleware.IsAPIPath(req) && !isAttachmentDownload(req) && !isAuthenticatedTokenRequest(req) {
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return nil, 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, nil
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}
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log.Trace("OAuth2 Authorization: Found token for user[%d]", id)
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user, err := user_model.GetUserByID(req.Context(), id)
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if err != nil {
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if !user_model.IsErrUserNotExist(err) {
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log.Error("GetUserByName: %v", err)
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}
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return nil, err
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}
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log.Trace("OAuth2 Authorization: Logged in user %-v", user)
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return user, nil
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}
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func isAuthenticatedTokenRequest(req *http.Request) bool {
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switch req.URL.Path {
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case "/login/oauth/userinfo":
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fallthrough
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case "/login/oauth/introspect":
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return true
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}
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return false
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}
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