dzming.li
A vibe coded tangled fork which supports pijul.
knotserver/git: reject requests to unknown repos
Signed-off-by: Seongmin Lee <git@boltless.me>
authored by
Seongmin Lee
and committed by
+64
-34
+24
-34
knotserver/git.go
+24
-34
knotserver/git.go
···
5
5
"fmt"
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6
"io"
7
7
"net/http"
8
-
"path/filepath"
8
+
"os"
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9
"strings"
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11
-
securejoin "github.com/cyphar/filepath-securejoin"
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"github.com/go-chi/chi/v5"
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"tangled.org/core/knotserver/git/service"
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)
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func (h *Knot) InfoRefs(w http.ResponseWriter, r *http.Request) {
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did := chi.URLParam(r, "did")
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name := chi.URLParam(r, "name")
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repoName, err := securejoin.SecureJoin(did, name)
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if err != nil {
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gitError(w, "repository not found", http.StatusNotFound)
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h.l.Error("git: failed to secure join repo path", "handler", "InfoRefs", "error", err)
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return
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}
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-
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repoPath, err := securejoin.SecureJoin(h.c.Repo.ScanPath, repoName)
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if err != nil {
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gitError(w, "repository not found", http.StatusNotFound)
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h.l.Error("git: failed to secure join repo path", "handler", "InfoRefs", "error", err)
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repoPath, ok := repoPathFromcontext(r.Context())
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if !ok {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte("Failed to find repository path"))
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return
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}
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···
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}
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func (h *Knot) UploadArchive(w http.ResponseWriter, r *http.Request) {
60
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did := chi.URLParam(r, "did")
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name := chi.URLParam(r, "name")
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repo, err := securejoin.SecureJoin(h.c.Repo.ScanPath, filepath.Join(did, name))
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if err != nil {
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gitError(w, err.Error(), http.StatusInternalServerError)
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h.l.Error("git: failed to secure join repo path", "handler", "UploadPack", "error", err)
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repo, ok := repoPathFromcontext(r.Context())
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if !ok {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte("Failed to find repository path"))
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return
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}
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···
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}
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func (h *Knot) UploadPack(w http.ResponseWriter, r *http.Request) {
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did := chi.URLParam(r, "did")
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name := chi.URLParam(r, "name")
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repo, err := securejoin.SecureJoin(h.c.Repo.ScanPath, filepath.Join(did, name))
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if err != nil {
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gitError(w, err.Error(), http.StatusInternalServerError)
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h.l.Error("git: failed to secure join repo path", "handler", "UploadPack", "error", err)
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repo, ok := repoPathFromcontext(r.Context())
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if !ok {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte("Failed to find repository path"))
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return
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}
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···
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}
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func (h *Knot) ReceivePack(w http.ResponseWriter, r *http.Request) {
156
-
did := chi.URLParam(r, "did")
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name := chi.URLParam(r, "name")
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_, err := securejoin.SecureJoin(h.c.Repo.ScanPath, filepath.Join(did, name))
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if err != nil {
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gitError(w, err.Error(), http.StatusForbidden)
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h.l.Error("git: failed to secure join repo path", "handler", "ReceivePack", "error", err)
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return
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}
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h.RejectPush(w, r, name)
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}
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···
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fmt.Fprintf(w, " Try:\ngit remote set-url --push origin git@%s:%s/%s\n\n... and push again.", hostname, ownerHandle, unqualifiedRepoName)
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}
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fmt.Fprintf(w, "\n\n")
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+
}
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+
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+
func isDir(path string) (bool, error) {
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info, err := os.Stat(path)
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if err == nil && info.IsDir() {
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return true, nil
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+
}
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if os.IsNotExist(err) {
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return false, nil
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}
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return false, err
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}
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func gitError(w http.ResponseWriter, msg string, status int) {
+40
knotserver/router.go
+40
knotserver/router.go
···
5
5
"fmt"
6
6
"log/slog"
7
7
"net/http"
8
+
"path/filepath"
8
9
"strings"
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+
securejoin "github.com/cyphar/filepath-securejoin"
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"github.com/go-chi/chi/v5"
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"tangled.org/core/idresolver"
12
14
"tangled.org/core/jetstream"
···
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r.Route("/{did}", func(r chi.Router) {
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r.Use(h.resolveDidRedirect)
86
+
r.Use(h.resolveRepo)
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r.Route("/{name}", func(r chi.Router) {
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// routes for git operations
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r.Get("/info/refs", h.InfoRefs)
···
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suffix := strings.TrimPrefix(r.URL.Path, "/"+didOrHandle)
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newPath := fmt.Sprintf("/%s/%s?%s", id.DID.String(), suffix, r.URL.RawQuery)
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http.Redirect(w, r, newPath, http.StatusTemporaryRedirect)
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+
})
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+
}
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+
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+
type ctxRepoPathKey struct{}
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func repoPathFromcontext(ctx context.Context) (string, bool) {
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v, ok := ctx.Value(ctxRepoPathKey{}).(string)
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return v, ok
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+
}
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+
154
+
// resolveRepo is a http middleware that constructs git repo path from given did & name pair.
155
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// It will reject the requests to unknown repos (when dir doesn't exist)
156
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func (h *Knot) resolveRepo(next http.Handler) http.Handler {
157
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
158
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did := chi.URLParam(r, "did")
159
+
name := chi.URLParam(r, "name")
160
+
repoPath, err := securejoin.SecureJoin(h.c.Repo.ScanPath, filepath.Join(did, name))
161
+
if err != nil {
162
+
w.WriteHeader(http.StatusNotFound)
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+
w.Write([]byte("Repository not found"))
164
+
return
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+
}
166
+
167
+
exist, err := isDir(repoPath)
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+
if err != nil {
169
+
w.WriteHeader(http.StatusInternalServerError)
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+
w.Write([]byte("Failed to check repository path"))
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+
return
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+
}
173
+
if !exist {
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+
w.WriteHeader(http.StatusNotFound)
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+
w.Write([]byte("Repository not found"))
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+
return
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+
}
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+
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ctx := context.WithValue(r.Context(), "repoPath", repoPath)
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+
next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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