| 1 | //go:build linux |
| 2 | |
| 3 | package dbreads |
| 4 | |
| 5 | import ( |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "testing" |
| 9 | |
| 10 | "golang.org/x/sys/unix" |
| 11 | ) |
| 12 | |
| 13 | func me() (uint32, error) { return uint32(os.Getuid()), nil } |
| 14 | |
| 15 | func other() (uint32, error) { return uint32(os.Getuid()) + 1, nil } |
| 16 | |
| 17 | func socketpairFile(t *testing.T, typ int) (*os.File, *os.File) { |
| 18 | t.Helper() |
| 19 | fds, err := unix.Socketpair(unix.AF_UNIX, typ, 0) |
| 20 | if err != nil { |
| 21 | t.Fatal(err) |
| 22 | } |
| 23 | a, b := os.NewFile(uintptr(fds[0]), "a"), os.NewFile(uintptr(fds[1]), "b") |
| 24 | t.Cleanup(func() { a.Close(); b.Close() }) |
| 25 | return a, b |
| 26 | } |
| 27 | |
| 28 | // The worker runs only on a connected unix stream socket whose peer is the |
| 29 | // agent's user (spec §8.3): it cannot be started by hand or pointed at a |
| 30 | // file. |
| 31 | func TestStdinConnRefusesWhatIsNotTheAgentsSocket(t *testing.T) { |
| 32 | t.Parallel() |
| 33 | file, err := os.Create(filepath.Join(t.TempDir(), "f")) |
| 34 | if err != nil { |
| 35 | t.Fatal(err) |
| 36 | } |
| 37 | defer file.Close() |
| 38 | r, w, err := os.Pipe() |
| 39 | if err != nil { |
| 40 | t.Fatal(err) |
| 41 | } |
| 42 | defer r.Close() |
| 43 | defer w.Close() |
| 44 | dgram, _ := socketpairFile(t, unix.SOCK_DGRAM) |
| 45 | stream, _ := socketpairFile(t, unix.SOCK_STREAM) |
| 46 | for name, f := range map[string]*os.File{"a file": file, "a pipe": r, "a datagram socket": dgram} { |
| 47 | if _, err := StdinConn(f, me); err == nil { |
| 48 | t.Errorf("%s accepted", name) |
| 49 | } |
| 50 | } |
| 51 | if _, err := StdinConn(stream, other); err == nil { |
| 52 | t.Fatal("a peer that is not the agent's user accepted") |
| 53 | } |
| 54 | c, err := StdinConn(stream, me) |
| 55 | if err != nil { |
| 56 | t.Fatal(err) |
| 57 | } |
| 58 | c.Close() |
| 59 | } |
| 60 | |
amadan