/* ·━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━· : : : █▀ █ █▀▀ · Blazing-fast pentesting suite : : ▄█ █ █▀ · BSD 3-Clause License : : : : (c) 2022-2026 vmfunc, xyzeva, : : lunchcat alumni & contributors : : : ·━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━· */ package scan import ( "net/http" "net/http/httptest" "strings" "testing" "time" ) const ( // reused across the artifact fixtures below. fakeSHA = "1d69b25b0d808e0e78ce366cd2ccf897e43783be" // the all-zero sha git writes as the previous value of a ref's first reflog. zeroSHA = "0000000000000000000000000000000000000000" ) func TestLooksLikeGit(t *testing.T) { tests := []struct { name string path string body string want bool }{ {"head ref", ".git/HEAD", "ref: refs/heads/main\n", true}, {"head detached", ".git/HEAD", fakeSHA + "\n", true}, {"config core", ".git/config", "[core]\n\trepositoryformatversion = 0\n", true}, {"index magic", ".git/index", "DIRC\x00\x00\x00\x02", true}, {"ref sha", ".git/refs/remotes/origin/main", fakeSHA + "\n", true}, {"ref sha256", ".git/refs/remotes/origin/main", strings.Repeat("a", 64) + "\n", true}, {"reflog line", ".git/logs/refs/remotes/origin/main", zeroSHA + " " + fakeSHA + " a 1 -0700\tx\n", true}, {"gitignore text", ".gitignore", "node_modules/\n", true}, {"gitignore comment lead", ".gitignore", "# build output\n*.log\n", true}, // a .gitignore can legitimately open with a '[' character-class glob // (common in .net repos), so the fallback must not treat '[' as json. {"gitignore bracket glob", ".gitignore", "[Bb]in/\n[Oo]bj/\n", true}, // a server that answers every path with the same shell is the dominant // false positive; none of these are the requested artifact. {"head json shell", ".git/HEAD", `{"error":"not found"}`, false}, {"head text shell", ".git/HEAD", "Not Found", false}, {"head html shell", ".git/HEAD", "", false}, {"config json shell", ".git/config", `{"error":"not found"}`, false}, {"index json shell", ".git/index", `{"error":"nope"}`, false}, {"ref json shell", ".git/refs/remotes/origin/main", `{"ok":true}`, false}, {"reflog text shell", ".git/logs/refs/remotes/origin/main", "Page not found", false}, {"gitignore json shell", ".gitignore", `{"error":"not found"}`, false}, {"gitignore json array shell", ".gitignore", `[{"error":"not found"}]`, false}, {"gitignore html shell", ".gitignore", "", false}, // known limit: .gitignore has no fixed shape, so a plain-text soft-404 is // indistinguishable from a real ignore file and is accepted. the structured // artifacts (HEAD/config/index/refs) carry the detection weight. {"gitignore plaintext soft404 accepted", ".gitignore", "Not Found", true}, {"empty body", ".git/HEAD", "", false}, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { if got := looksLikeGit(tt.path, []byte(tt.body)); got != tt.want { t.Errorf("looksLikeGit(%q, %q) = %v, want %v", tt.path, tt.body, got, tt.want) } }) } } // gitFixtureApp backs TestGit_SuppressesCatchAll: real .git/HEAD plus a catch-all 200 json shell everywhere else. func gitFixtureApp() *httptest.Server { mux := http.NewServeMux() mux.HandleFunc("/.git/HEAD", func(w http.ResponseWriter, _ *http.Request) { w.Write([]byte("ref: refs/heads/main\n")) }) mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { if r.URL.Path == "/.git/HEAD" { return } w.Header().Set("Content-Type", "application/json") w.Write([]byte(`{"error":"not found"}`)) }) return httptest.NewServer(mux) } func TestGit_SuppressesCatchAll(t *testing.T) { target := gitFixtureApp() defer target.Close() list := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) { w.Write([]byte(".git/HEAD\n.git/config\n.git/index\n")) })) defer list.Close() orig := gitURL gitURL = list.URL + "/" t.Cleanup(func() { gitURL = orig }) found, err := Git(target.URL, 5*time.Second, 3, "") if err != nil { t.Fatalf("Git: %v", err) } if len(found) != 1 { t.Fatalf("expected only the real .git/HEAD to surface, got %d: %v", len(found), found) } if !strings.HasSuffix(found[0], "/.git/HEAD") { t.Errorf("expected .git/HEAD, got %q", found[0]) } }