| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "os" |
| 5 | "sort" |
| 6 | "strings" |
| 7 | |
| 8 | "github.com/carlosframework/platform/internal/hostbox" |
| 9 | "github.com/carlosframework/platform/internal/hostguard" |
| 10 | "github.com/carlosframework/platform/internal/registry" |
| 11 | ) |
| 12 | |
| 13 | func inventoryTimerNames(a hostguard.InstallationArtifacts) ([]string, error) { |
| 14 | if a.Schema != 1 || len(a.Timers) > 1<<20 { |
| 15 | return nil, os.ErrPermission |
| 16 | } |
| 17 | if a.Timers == "" { |
| 18 | return nil, nil |
| 19 | } |
| 20 | names := strings.Split(a.Timers, "\n") |
| 21 | if len(names) > 8192 { |
| 22 | return nil, os.ErrPermission |
| 23 | } |
| 24 | for i, name := range names { |
| 25 | if name == "" || name == "." || name == ".." || strings.ContainsAny(name, "/\\\r\x00") || (i > 0 && names[i-1] >= name) { |
| 26 | return nil, os.ErrPermission |
| 27 | } |
| 28 | } |
| 29 | return names, nil |
| 30 | } |
| 31 | |
| 32 | func rootInventoryArtifacts(prior hostguard.RootInstallation, canonical registry.Route, in hostbox.StopInventory, revision uint64) (hostguard.InstallationArtifacts, error) { |
| 33 | a := prior.Artifacts |
| 34 | if a == (hostguard.InstallationArtifacts{}) { |
| 35 | // Only the independently checked first registration establishes absence. |
| 36 | // Older installations remain unknown; today's shape cannot reconstruct them. |
| 37 | if revision != 0 { |
| 38 | return a, nil |
| 39 | } |
| 40 | a.Schema = 1 |
| 41 | } |
| 42 | names, err := inventoryTimerNames(a) |
| 43 | if err != nil { |
| 44 | return a, err |
| 45 | } |
| 46 | a.StateDirectory = a.StateDirectory || canonical.DBPath != "" |
| 47 | set := map[string]bool{} |
| 48 | for _, name := range names { |
| 49 | set[name] = true |
| 50 | } |
| 51 | for _, e := range in.Entries { |
| 52 | if e.Kind == "timer" { |
| 53 | set[strings.TrimPrefix(e.RelativePath, in.Host+"/")] = true |
| 54 | } |
| 55 | } |
| 56 | names = nil |
| 57 | for name := range set { |
| 58 | names = append(names, name) |
| 59 | } |
| 60 | sort.Strings(names) |
| 61 | a.Timers = strings.Join(names, "\n") |
| 62 | _, err = inventoryTimerNames(a) |
| 63 | return a, err |
| 64 | } |
| 65 | |
| 66 | func (h ClaimRootHTTP) verifyInventoryTimers(in hostbox.StopInventory) error { |
| 67 | timers, err := h.Reconcile.Registry.TimersFor(in.Host) |
| 68 | if err != nil { |
| 69 | return err |
| 70 | } |
| 71 | if len(timers) > 8192 { |
| 72 | return hostbox.ErrTypedInventory |
| 73 | } |
| 74 | for _, timer := range timers { |
| 75 | found := false |
| 76 | for _, e := range in.Entries { |
| 77 | if e.Kind == "timer" && e.RelativePath == in.Host+"/"+timer.Name { |
| 78 | found = true |
| 79 | break |
| 80 | } |
| 81 | } |
| 82 | if !found { |
| 83 | return hostbox.ErrTypedInventory |
| 84 | } |
| 85 | } |
| 86 | return nil |
| 87 | } |
| 88 | |
| 89 | func generationRetainedTimers(snapshot generationInventory) error { |
| 90 | for _, view := range snapshot.Installations { |
| 91 | names, err := inventoryTimerNames(view.Installation.Artifacts) |
| 92 | if err != nil { |
| 93 | return err |
| 94 | } |
| 95 | present := map[string]bool{} |
| 96 | for _, p := range snapshot.Payloads { |
| 97 | if p.Inventory.Host != view.Host { |
| 98 | continue |
| 99 | } |
| 100 | for _, e := range p.Inventory.Entries { |
| 101 | if e.Kind == "timer" { |
| 102 | present[strings.TrimPrefix(e.RelativePath, view.Host+"/")] = true |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 | for _, name := range names { |
| 107 | if !present[name] { |
| 108 | return os.ErrPermission |
| 109 | } |
| 110 | } |
| 111 | } |
| 112 | return nil |
| 113 | } |
| 114 | |
amadan