mirror of
https://github.com/go-gitea/gitea
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e6b3be4608
When migrating add several more important sanity checks: * SHAs must be SHAs * Refs must be valid Refs * URLs must be reasonable Signed-off-by: Andrew Thornton <art27@cantab.net> Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: techknowlogick <matti@mdranta.net>
82 lines
2.9 KiB
Go
82 lines
2.9 KiB
Go
// Copyright 2022 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 migrations
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import (
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"fmt"
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"strings"
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admin_model "code.gitea.io/gitea/models/admin"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/log"
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base "code.gitea.io/gitea/modules/migration"
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)
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// WarnAndNotice will log the provided message and send a repository notice
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func WarnAndNotice(fmtStr string, args ...interface{}) {
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log.Warn(fmtStr, args...)
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if err := admin_model.CreateRepositoryNotice(fmt.Sprintf(fmtStr, args...)); err != nil {
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log.Error("create repository notice failed: ", err)
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}
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}
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func hasBaseURL(toCheck, baseURL string) bool {
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if len(baseURL) > 0 && baseURL[len(baseURL)-1] != '/' {
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baseURL += "/"
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}
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return strings.HasPrefix(toCheck, baseURL)
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}
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// CheckAndEnsureSafePR will check that a given PR is safe to download
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func CheckAndEnsureSafePR(pr *base.PullRequest, commonCloneBaseURL string, g base.Downloader) bool {
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valid := true
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// SECURITY: the patchURL must be checked to have the same baseURL as the current to prevent open redirect
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if pr.PatchURL != "" && !hasBaseURL(pr.PatchURL, commonCloneBaseURL) {
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// TODO: Should we check that this url has the expected format for a patch url?
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WarnAndNotice("PR #%d in %s has invalid PatchURL: %s baseURL: %s", pr.Number, g, pr.PatchURL, commonCloneBaseURL)
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pr.PatchURL = ""
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valid = false
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}
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// SECURITY: the headCloneURL must be checked to have the same baseURL as the current to prevent open redirect
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if pr.Head.CloneURL != "" && !hasBaseURL(pr.Head.CloneURL, commonCloneBaseURL) {
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// TODO: Should we check that this url has the expected format for a patch url?
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WarnAndNotice("PR #%d in %s has invalid HeadCloneURL: %s baseURL: %s", pr.Number, g, pr.Head.CloneURL, commonCloneBaseURL)
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pr.Head.CloneURL = ""
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valid = false
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}
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// SECURITY: SHAs Must be a SHA
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if pr.MergeCommitSHA != "" && !git.IsValidSHAPattern(pr.MergeCommitSHA) {
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WarnAndNotice("PR #%d in %s has invalid MergeCommitSHA: %s", pr.Number, g, pr.MergeCommitSHA)
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pr.MergeCommitSHA = ""
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}
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if pr.Head.SHA != "" && !git.IsValidSHAPattern(pr.Head.SHA) {
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WarnAndNotice("PR #%d in %s has invalid HeadSHA: %s", pr.Number, g, pr.Head.SHA)
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pr.Head.SHA = ""
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valid = false
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}
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if pr.Base.SHA != "" && !git.IsValidSHAPattern(pr.Base.SHA) {
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WarnAndNotice("PR #%d in %s has invalid BaseSHA: %s", pr.Number, g, pr.Base.SHA)
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pr.Base.SHA = ""
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valid = false
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}
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// SECURITY: Refs must be valid refs or SHAs
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if pr.Head.Ref != "" && !git.IsValidRefPattern(pr.Head.Ref) {
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WarnAndNotice("PR #%d in %s has invalid HeadRef: %s", pr.Number, g, pr.Head.Ref)
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pr.Head.Ref = ""
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valid = false
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}
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if pr.Base.Ref != "" && !git.IsValidRefPattern(pr.Base.Ref) {
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WarnAndNotice("PR #%d in %s has invalid BaseRef: %s", pr.Number, g, pr.Base.Ref)
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pr.Base.Ref = ""
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valid = false
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}
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pr.EnsuredSafe = true
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return valid
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}
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