| 1 | //go:build linux |
| 2 | |
| 3 | package host |
| 4 | |
| 5 | import ( |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "testing" |
| 9 | ) |
| 10 | |
| 11 | func TestClaimPrivateStateRepairsOwnedSQLiteMode(t *testing.T) { |
| 12 | root := t.TempDir() |
| 13 | path := filepath.Join(root, "launches.db") |
| 14 | if err := os.WriteFile(path, []byte("journal"), 0644); err != nil { |
| 15 | t.Fatal(err) |
| 16 | } |
| 17 | if err := claimPrivatePathOwner(path, os.Getuid(), os.Getgid(), false); err != nil { |
| 18 | t.Fatal(err) |
| 19 | } |
| 20 | info, err := os.Stat(path) |
| 21 | if err != nil || info.Mode().Perm() != 0600 { |
| 22 | t.Fatalf("private database: info=%v err=%v", info, err) |
| 23 | } |
| 24 | if err := claimPrivatePathOwner(root, os.Getuid(), os.Getgid(), true); err != nil { |
| 25 | t.Fatal(err) |
| 26 | } |
| 27 | info, err = os.Stat(root) |
| 28 | if err != nil || info.Mode().Perm() != 0700 { |
| 29 | t.Fatalf("private directory: info=%v err=%v", info, err) |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | func TestClaimPrivateStateRefusesSymlinkAndForeignOwner(t *testing.T) { |
| 34 | root := t.TempDir() |
| 35 | path := filepath.Join(root, "journal") |
| 36 | if err := os.WriteFile(path, nil, 0600); err != nil { |
| 37 | t.Fatal(err) |
| 38 | } |
| 39 | link := filepath.Join(root, "link") |
| 40 | if err := os.Symlink(path, link); err != nil { |
| 41 | t.Fatal(err) |
| 42 | } |
| 43 | if err := claimPrivatePathOwner(link, os.Getuid(), os.Getgid(), false); err == nil { |
| 44 | t.Fatal("symlink accepted") |
| 45 | } |
| 46 | if os.Geteuid() != 0 { |
| 47 | if err := claimPrivatePathOwner(path, os.Getuid()+1, os.Getgid(), false); err == nil { |
| 48 | t.Fatal("foreign owner accepted") |
| 49 | } |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | func TestClaimReviewDatabaseOwnerCheckedBeforeSQLite(t *testing.T) { |
| 54 | path := filepath.Join(t.TempDir(), "journal.db") |
| 55 | if err := prepareClaimDatabaseOwner(path, os.Getuid(), os.Getgid()); err != nil { |
| 56 | t.Fatal(err) |
| 57 | } |
| 58 | if err := prepareClaimDatabaseOwner(path, os.Getuid()+1, os.Getgid()); err == nil { |
| 59 | t.Fatal("foreign journal owner accepted") |
| 60 | } |
| 61 | victim := filepath.Join(t.TempDir(), "victim") |
| 62 | if err := os.Symlink(victim, path+"-wal"); err != nil { |
| 63 | t.Fatal(err) |
| 64 | } |
| 65 | if err := prepareClaimDatabaseOwner(path, os.Getuid(), os.Getgid()); err == nil { |
| 66 | t.Fatal("planted WAL accepted") |
| 67 | } |
| 68 | if _, err := os.Lstat(victim); !os.IsNotExist(err) { |
| 69 | t.Fatalf("touched victim: %v", err) |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | func TestClaimStateOwnersRejectHardLinksAndSymlinkParents(t *testing.T) { |
| 74 | for _, kind := range []string{"hardlink", "parent"} { |
| 75 | for _, operation := range []string{"repair", "prepare"} { |
| 76 | t.Run(kind+"/"+operation, func(t *testing.T) { |
| 77 | dir := t.TempDir() |
| 78 | victim := filepath.Join(dir, "victim") |
| 79 | if err := os.WriteFile(victim, []byte("unchanged"), 0644); err != nil { |
| 80 | t.Fatal(err) |
| 81 | } |
| 82 | path := filepath.Join(dir, "unsafe") |
| 83 | if kind == "hardlink" { |
| 84 | if err := os.Link(victim, path); err != nil { |
| 85 | t.Fatal(err) |
| 86 | } |
| 87 | } else { |
| 88 | if err := os.Symlink(dir, path); err != nil { |
| 89 | t.Fatal(err) |
| 90 | } |
| 91 | path = filepath.Join(path, "victim") |
| 92 | } |
| 93 | var err error |
| 94 | if operation == "repair" { |
| 95 | err = claimPrivatePathOwner(path, os.Getuid(), os.Getgid(), false) |
| 96 | } else { |
| 97 | err = prepareClaimDatabaseOwner(path, os.Getuid(), os.Getgid()) |
| 98 | } |
| 99 | if err == nil { |
| 100 | t.Fatal("unsafe claim path accepted") |
| 101 | } |
| 102 | info, err := os.Stat(victim) |
| 103 | if err != nil || info.Mode().Perm() != 0644 { |
| 104 | t.Fatalf("victim mode changed: %v %v", info, err) |
| 105 | } |
| 106 | body, err := os.ReadFile(victim) |
| 107 | if err != nil || string(body) != "unchanged" { |
| 108 | t.Fatalf("victim changed: %q %v", body, err) |
| 109 | } |
| 110 | }) |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | |
amadan