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Check commit message hashes before making links

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Previously, when formatting commit messages, anything
that looked like SHA1 hashes was turned into a link
using regex. This meant that certain phrases or numbers
such as `777777` or `deadbeef` could be recognized as a commit
even if the repository has no commit with those hashes.

This change will make it so that anything that looks
like a SHA1 hash using regex will then also be checked
to ensure that there is a commit in the repository
with that hash before making a link.

Signed-off-by: Gary Kim <gary@garykim.dev>
This commit is contained in:
Gary Kim 2019-08-02 15:31:41 +08:00
parent 06392479b4
commit e887f922ca
No known key found for this signature in database
GPG key ID: 9349B59FB54594AC
2 changed files with 12 additions and 2 deletions
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5
models/repo.go
View file

@ -508,8 +508,9 @@ func (repo *Repository) mustOwnerName(e Engine) string {
func (repo *Repository) ComposeMetas() map[string]string {
if repo.ExternalMetas == nil {
repo.ExternalMetas = map[string]string{
"user": repo.MustOwner().Name,
"repo": repo.Name,
"user": repo.MustOwner().Name,
"repo": repo.Name,
"repoPath": repo.RepoPath(),
}
unit, err := repo.GetUnit(UnitTypeExternalTracker)
if err != nil {

9
modules/markup/html.go
View file

@ -13,6 +13,7 @@ import (
"strings"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
@ -657,6 +658,14 @@ func sha1CurrentPatternProcessor(ctx *postProcessCtx, node *html.Node) {
// but that is not always the case.
// Although unlikely, deadbeef and 1234567 are valid short forms of SHA1 hash
// as used by git and github for linking and thus we have to do similar.
// Because of this, we check to make sure that a matched hash is actually
// a commit in the repository before making it a link.
if ctx.metas["repoPath"] != "" {
if _, err := git.NewCommand("log", "-1", hash).RunInDirBytes(ctx.metas["repoPath"]); err != nil {
return
}
}
replaceContent(node, m[2], m[3],
createCodeLink(util.URLJoin(setting.AppURL, ctx.metas["user"], ctx.metas["repo"], "commit", hash), base.ShortSha(hash)))
}