forked from NYANDEV/forgejo
Check commit message hashes before making links (#7713)
* Check commit message hashes before making links 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> * Use gogit to check if commit exists This commit modifies the commit hash check in the render for commit messages to use gogit for better performance. Signed-off-by: Gary Kim <gary@garykim.dev> * Make code cleaner Signed-off-by: Gary Kim <gary@garykim.dev> * Use rev-parse to check if commit exists Signed-off-by: Gary Kim <gary@garykim.dev> * Add and modify tests for checking hashes in html link rendering Signed-off-by: Gary Kim <gary@garykim.dev> * Return error in sha1CurrentPatternProcessor Co-Authored-By: mrsdizzie <info@mrsdizzie.com> * Import Gitea log module Signed-off-by: Gary Kim <gary@garykim.dev> * Revert "Return error in sha1CurrentPatternProcessor" This reverts commit 28f561cac46ef7e51aa26aefcbe9aca4671366a6. Signed-off-by: Gary Kim <gary@garykim.dev> * Add debug logging to sha1CurrentPatternProcessor This will log errors by the git command run in sha1CurrentPatternProcessor if the error is one that was unexpected. Signed-off-by: Gary Kim <gary@garykim.dev>
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4 changed files with 34 additions and 16 deletions
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@ -13,6 +13,8 @@ import (
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"strings"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/util"
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@ -646,6 +648,9 @@ func fullSha1PatternProcessor(ctx *postProcessCtx, node *html.Node) {
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// sha1CurrentPatternProcessor renders SHA1 strings to corresponding links that
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// are assumed to be in the same repository.
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func sha1CurrentPatternProcessor(ctx *postProcessCtx, node *html.Node) {
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if ctx.metas == nil || ctx.metas["user"] == "" || ctx.metas["repo"] == "" || ctx.metas["repoPath"] == "" {
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return
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}
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m := sha1CurrentPattern.FindStringSubmatchIndex(node.Data)
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if m == nil {
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return
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@ -657,6 +662,15 @@ func sha1CurrentPatternProcessor(ctx *postProcessCtx, node *html.Node) {
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// but that is not always the case.
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// Although unlikely, deadbeef and 1234567 are valid short forms of SHA1 hash
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// as used by git and github for linking and thus we have to do similar.
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// Because of this, we check to make sure that a matched hash is actually
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// a commit in the repository before making it a link.
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if _, err := git.NewCommand("rev-parse", "--verify", hash).RunInDirBytes(ctx.metas["repoPath"]); err != nil {
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if !strings.Contains(err.Error(), "fatal: Needed a single revision") {
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log.Debug("sha1CurrentPatternProcessor git rev-parse: %v", err)
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}
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return
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}
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replaceContent(node, m[2], m[3],
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createCodeLink(util.URLJoin(setting.AppURL, ctx.metas["user"], ctx.metas["repo"], "commit", hash), base.ShortSha(hash)))
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}
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