| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "context" |
| 6 | "encoding/json" |
| 7 | "errors" |
| 8 | "os" |
| 9 | "path/filepath" |
| 10 | "reflect" |
| 11 | "sort" |
| 12 | "strings" |
| 13 | |
| 14 | "github.com/carlosframework/platform/internal/hostbox" |
| 15 | "github.com/carlosframework/platform/internal/hostguard" |
| 16 | "github.com/carlosframework/platform/internal/rootstate" |
| 17 | ) |
| 18 | |
| 19 | func productionGenerationHandovers(ctx context.Context) ([]hostbox.GenerationHandover, error) { |
| 20 | path := filepath.Join(claimRetireJournalDir("", ""), "serving") |
| 21 | s, err := rootstate.Open(path, false, false) |
| 22 | if errors.Is(err, os.ErrNotExist) { |
| 23 | return nil, nil |
| 24 | } |
| 25 | if err != nil { |
| 26 | return nil, err |
| 27 | } |
| 28 | defer s.Close() |
| 29 | out, err := generationReadHandovers(ctx, s) |
| 30 | if err != nil { |
| 31 | return nil, err |
| 32 | } |
| 33 | directory, err := os.Open(path) |
| 34 | if err != nil { |
| 35 | return nil, err |
| 36 | } |
| 37 | defer directory.Close() |
| 38 | if err = directory.Sync(); err != nil { |
| 39 | return nil, err |
| 40 | } |
| 41 | return out, nil |
| 42 | } |
| 43 | |
| 44 | func generationReadHandovers(ctx context.Context, s rootstate.Store) ([]hostbox.GenerationHandover, error) { |
| 45 | names, err := s.Names() |
| 46 | if err != nil { |
| 47 | return nil, err |
| 48 | } |
| 49 | if len(names) > 8192 { |
| 50 | return nil, os.ErrPermission |
| 51 | } |
| 52 | sort.Strings(names) |
| 53 | var out []hostbox.GenerationHandover |
| 54 | for _, name := range names { |
| 55 | if err := ctx.Err(); err != nil { |
| 56 | return nil, err |
| 57 | } |
| 58 | if strings.HasPrefix(name, ".handover-") { |
| 59 | continue |
| 60 | } |
| 61 | raw, err := s.Read(name) |
| 62 | if err != nil { |
| 63 | return nil, err |
| 64 | } |
| 65 | j, err := hostbox.DecodeGenerationHandover(raw) |
| 66 | if err != nil || name != j.ID+".json" { |
| 67 | return nil, os.ErrPermission |
| 68 | } |
| 69 | out = append(out, j) |
| 70 | } |
| 71 | return out, nil |
| 72 | } |
| 73 | |
| 74 | func generationTransfers(ctx context.Context, snapshot generationInventory) (map[int]int, error) { |
| 75 | out := map[int]int{} |
| 76 | for _, j := range snapshot.Handovers { |
| 77 | if err := ctx.Err(); err != nil { |
| 78 | return nil, err |
| 79 | } |
| 80 | raw, err := json.Marshal(j) |
| 81 | if err != nil { |
| 82 | return nil, err |
| 83 | } |
| 84 | if _, err = hostbox.DecodeGenerationHandover(raw); err != nil { |
| 85 | return nil, err |
| 86 | } |
| 87 | p, n := j.Prior, j.Successor |
| 88 | oldIndex, nextIndex := -1, -1 |
| 89 | for i, payload := range snapshot.Payloads { |
| 90 | in := payload.Inventory |
| 91 | if in.Host != p.Host || in.Incarnation != p.Incarnation { |
| 92 | continue |
| 93 | } |
| 94 | if in.InstallationStamp == p.Stamp { |
| 95 | if oldIndex != -1 || j.ServingInstallation == nil || payload.Revision != j.ServingInstallation.InventoryRevision || !reflect.DeepEqual(in, j.Inventory) { |
| 96 | return nil, os.ErrPermission |
| 97 | } |
| 98 | oldIndex = i |
| 99 | } |
| 100 | if in.InstallationStamp == n.Stamp { |
| 101 | if nextIndex != -1 || in.Box != n.Box || in.Enrollment != n.Enrollment || in.DirectoryRevision != n.DirectoryRevision { |
| 102 | return nil, os.ErrPermission |
| 103 | } |
| 104 | nextIndex = i |
| 105 | } |
| 106 | } |
| 107 | if oldIndex < 0 || nextIndex < 0 { |
| 108 | return nil, os.ErrPermission |
| 109 | } |
| 110 | if _, exists := out[oldIndex]; exists { |
| 111 | return nil, os.ErrPermission |
| 112 | } |
| 113 | bound := false |
| 114 | for _, view := range snapshot.Installations { |
| 115 | if view.Host != p.Host { |
| 116 | continue |
| 117 | } |
| 118 | in, err := generationInstallation(view, generationOwner(p)) |
| 119 | if err != nil || rootHistoryInstallation(in) != rootHistoryInstallation(*j.ServingInstallation) { |
| 120 | return nil, os.ErrPermission |
| 121 | } |
| 122 | retired := false |
| 123 | for _, old := range view.Retired { |
| 124 | if old == (hostguard.Captured{Incarnation: p.Incarnation, Stamp: p.Stamp}) { |
| 125 | retired = true |
| 126 | } |
| 127 | } |
| 128 | next := p |
| 129 | next.Stamp, next.Session = n.Stamp, n.Session |
| 130 | if _, err := generationInstallation(view, generationOwner(next)); err != nil || !retired { |
| 131 | return nil, os.ErrPermission |
| 132 | } |
| 133 | receipt := p.Session == 0 && reflect.DeepEqual(j.Receipt, hostguard.FenceReceipt{}) |
| 134 | for _, r := range view.Receipts { |
| 135 | if r.Target == p && j.Receipt.Target == p && bytes.Equal(r.Bytes, j.Receipt.Bytes) && verifyRetirementReceipt(ctx, r) == nil { |
| 136 | receipt = true |
| 137 | } |
| 138 | } |
| 139 | if !receipt { |
| 140 | return nil, os.ErrPermission |
| 141 | } |
| 142 | bound = true |
| 143 | } |
| 144 | if !bound { |
| 145 | return nil, os.ErrPermission |
| 146 | } |
| 147 | next := snapshot.Payloads[nextIndex].Inventory |
| 148 | for _, old := range j.Inventory.Entries { |
| 149 | matches := 0 |
| 150 | for _, entry := range next.Entries { |
| 151 | if entry.Kind != old.Kind || entry.ManagedRoot != old.ManagedRoot || entry.RelativePath != old.RelativePath || entry.ArtifactID != old.ArtifactID { |
| 152 | continue |
| 153 | } |
| 154 | if old.Materialization != "materialized" || entry.Materialization != "materialized" || old.Ownership != j.Before.Route.ClaimOwner || entry.Ownership != j.After.Route.ClaimOwner { |
| 155 | return nil, os.ErrPermission |
| 156 | } |
| 157 | switch old.Kind { |
| 158 | case "route": |
| 159 | if old.RowIdentity != j.Before.Route.ClaimRowID || entry.RowIdentity != j.After.Route.ClaimRowID { |
| 160 | return nil, os.ErrPermission |
| 161 | } |
| 162 | case "path": |
| 163 | if old.Type != entry.Type || old.Inode != entry.Inode || (old.Identity.Boot != "" && !old.Identity.Same(entry.Identity)) || (old.Identity.Boot == "" && (old.Device != entry.Device || entry.Identity.Boot != p.BootID || entry.Identity.Device != entry.Device || entry.Identity.Inode != entry.Inode)) { |
| 164 | return nil, os.ErrPermission |
| 165 | } |
| 166 | case "timer": |
| 167 | found := false |
| 168 | for i, timer := range j.Before.Timers { |
| 169 | if old.RelativePath == p.Host+"/"+timer.Name && old.RowIdentity == timer.ClaimRowID && entry.RowIdentity == j.After.Timers[i].ClaimRowID { |
| 170 | found = true |
| 171 | } |
| 172 | } |
| 173 | if !found { |
| 174 | return nil, os.ErrPermission |
| 175 | } |
| 176 | default: |
| 177 | return nil, os.ErrPermission |
| 178 | } |
| 179 | matches++ |
| 180 | } |
| 181 | if matches != 1 { |
| 182 | return nil, os.ErrPermission |
| 183 | } |
| 184 | } |
| 185 | out[oldIndex] = nextIndex |
| 186 | } |
| 187 | return out, nil |
| 188 | } |
| 189 | |
amadan