From 74b5133374eb3e16b995c88d63d1e01280a8cfb4 Mon Sep 17 00:00:00 2001 From: Gusted Date: Fri, 27 Jan 2023 01:07:33 +0100 Subject: [PATCH] [PRIVACY] Add a DNS method to fetch new updates - Use TXT records in order to determine the latest available version. - This addresses a valid privacy issue, as with HTTP requests the server can keep track(estimated) of how many instances are using Forgejo, with DNS that's basically not possible as the server will never receive any data, as the only ones receiving data are DNS resolvers. (cherry picked from commit 0baefb546ab96bc3c06d90feffdb14873c2c2a3a) (cherry picked from commit e8ee41880b775532e6a68bd2052ed96d369dee78) (cherry picked from commit 7eca4f3bf1faa3f063c9668d1bb354b842361007) (cherry picked from commit 6dde3992dc504f105f2285c34fa6445fa24da0b1) (cherry picked from commit fb3a37fbfc73d35e3ba8d793b6051aeddcbb0634) (cherry picked from commit 8304af1e9d94b89ee700b0d454d74d0dc5cfac64) (cherry picked from commit 0543a7d12a4bac012db8b9e683e879e6f265a9dc) (cherry picked from commit c3a22933b7ca8201c96267d360281848fb2a1c7e) (cherry picked from commit e24370769413aebe96ba6cfb230da3c2c33e39f4) (cherry picked from commit 7eb6d1bcf7a0bdae0cbbf06136854d0b29c54899) (cherry picked from commit 1d7b9535cd73bffda5defd143c25e514cc55dee8) (cherry picked from commit 05920dce67808ae346c4e9cd9a41c9942e857bc6) (cherry picked from commit f173f27d7c3bf36c54b7e715a61b2308d1b0d277) (cherry picked from commit 90e1c9340e72f08e67293647cf5f19b3e3571909) (cherry picked from commit de68610ea70b81146f6412e42d72b97aad0428ae) (cherry picked from commit 8d5757ea0459cffeb885462b7a9d1e1c630e1f16) (cherry picked from commit c7a7fff316c1a88ba9b0984114a25cecfac56bce) (cherry picked from commit 39ac8b8fc164090eacd5870bf78ea863d2add5fa) (cherry picked from commit 2f65c02905b529bd1bed617c7d0fc3510a9b2a95) --- custom/conf/app.example.ini | 1 + modules/updatechecker/update_checker.go | 60 +++++++++++++++++--- modules/updatechecker/update_checker_test.go | 16 ++++++ services/cron/tasks_extended.go | 8 ++- 4 files changed, 75 insertions(+), 10 deletions(-) create mode 100644 modules/updatechecker/update_checker_test.go diff --git a/custom/conf/app.example.ini b/custom/conf/app.example.ini index 7d2e177128..fbe71a841f 100644 --- a/custom/conf/app.example.ini +++ b/custom/conf/app.example.ini @@ -2160,6 +2160,7 @@ LEVEL = Info ;ENABLE_SUCCESS_NOTICE = false ;SCHEDULE = @every 168h ;HTTP_ENDPOINT = https://dl.gitea.com/gitea/version.json +;DOMAIN_ENDPOINT = release.forgejo.org ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; diff --git a/modules/updatechecker/update_checker.go b/modules/updatechecker/update_checker.go index bc3f93aad7..d3008ab122 100644 --- a/modules/updatechecker/update_checker.go +++ b/modules/updatechecker/update_checker.go @@ -4,8 +4,11 @@ package updatechecker import ( + "errors" "io" + "net" "net/http" + "strings" "code.gitea.io/gitea/modules/json" "code.gitea.io/gitea/modules/proxy" @@ -26,7 +29,51 @@ func (r *CheckerState) Name() string { } // GiteaUpdateChecker returns error when new version of Gitea is available -func GiteaUpdateChecker(httpEndpoint string) error { +func GiteaUpdateChecker(httpEndpoint, domainEndpoint string) error { + var version string + var err error + if domainEndpoint != "" { + version, err = getVersionDNS(domainEndpoint) + } else { + version, err = getVersionHTTP(httpEndpoint) + } + + if err != nil { + return err + } + + return UpdateRemoteVersion(version) +} + +// getVersionDNS will request the TXT records for the domain. If a record starts +// with "forgejo_versions=" everything after that will be used as the latest +// version available. +func getVersionDNS(domainEndpoint string) (version string, err error) { + records, err := net.LookupTXT(domainEndpoint) + if err != nil { + return "", err + } + + if len(records) == 0 { + return "", errors.New("no TXT records were found") + } + + for _, record := range records { + if strings.HasPrefix(record, "forgejo_versions=") { + // Get all supported versions, separated by a comma. + supportedVersions := strings.Split(strings.TrimPrefix(record, "forgejo_versions="), ",") + // For now always return the latest supported version. + return supportedVersions[len(supportedVersions)-1], nil + } + } + + return "", errors.New("there is no TXT record with a valid value") +} + +// getVersionHTTP will make an HTTP request to the endpoint, and the returned +// content is JSON. The "latest.version" path's value will be used as the latest +// version available. +func getVersionHTTP(httpEndpoint string) (version string, err error) { httpClient := &http.Client{ Transport: &http.Transport{ Proxy: proxy.Proxy(), @@ -35,16 +82,16 @@ func GiteaUpdateChecker(httpEndpoint string) error { req, err := http.NewRequest("GET", httpEndpoint, nil) if err != nil { - return err + return "", err } resp, err := httpClient.Do(req) if err != nil { - return err + return "", err } defer resp.Body.Close() body, err := io.ReadAll(resp.Body) if err != nil { - return err + return "", err } type respType struct { @@ -55,10 +102,9 @@ func GiteaUpdateChecker(httpEndpoint string) error { respData := respType{} err = json.Unmarshal(body, &respData) if err != nil { - return err + return "", err } - - return UpdateRemoteVersion(respData.Latest.Version) + return respData.Latest.Version, nil } // UpdateRemoteVersion updates the latest available version of Gitea diff --git a/modules/updatechecker/update_checker_test.go b/modules/updatechecker/update_checker_test.go new file mode 100644 index 0000000000..301afd95e4 --- /dev/null +++ b/modules/updatechecker/update_checker_test.go @@ -0,0 +1,16 @@ +// Copyright 2023 The Forgejo Authors. All rights reserved. +// SPDX-License-Identifier: MIT + +package updatechecker + +import ( + "testing" + + "github.com/stretchr/testify/assert" +) + +func TestDNSUpdate(t *testing.T) { + version, err := getVersionDNS("release.forgejo.org") + assert.NoError(t, err) + assert.NotEmpty(t, version) +} diff --git a/services/cron/tasks_extended.go b/services/cron/tasks_extended.go index 90d4898c41..0ac6ada6c5 100644 --- a/services/cron/tasks_extended.go +++ b/services/cron/tasks_extended.go @@ -142,7 +142,8 @@ func registerDeleteOldActions() { func registerUpdateGiteaChecker() { type UpdateCheckerConfig struct { BaseConfig - HTTPEndpoint string + HTTPEndpoint string + DomainEndpoint string } RegisterTaskFatal("update_checker", &UpdateCheckerConfig{ BaseConfig: BaseConfig{ @@ -150,10 +151,11 @@ func registerUpdateGiteaChecker() { RunAtStart: false, Schedule: "@every 168h", }, - HTTPEndpoint: "https://dl.gitea.com/gitea/version.json", + HTTPEndpoint: "https://dl.gitea.com/gitea/version.json", + DomainEndpoint: "release.forgejo.org", }, func(ctx context.Context, _ *user_model.User, config Config) error { updateCheckerConfig := config.(*UpdateCheckerConfig) - return updatechecker.GiteaUpdateChecker(updateCheckerConfig.HTTPEndpoint) + return updatechecker.GiteaUpdateChecker(updateCheckerConfig.HTTPEndpoint, updateCheckerConfig.DomainEndpoint) }) }