| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "crypto/sha256" |
| 6 | "encoding/hex" |
| 7 | "encoding/json" |
| 8 | "errors" |
| 9 | "os" |
| 10 | |
| 11 | "github.com/carlosframework/platform/internal/hostbox" |
| 12 | "github.com/carlosframework/platform/internal/hostguard" |
| 13 | "github.com/carlosframework/platform/internal/provision" |
| 14 | "github.com/carlosframework/platform/internal/release" |
| 15 | "github.com/carlosframework/platform/internal/rootparticipation" |
| 16 | "github.com/carlosframework/platform/internal/rootstate" |
| 17 | ) |
| 18 | |
| 19 | type generationInventory struct { |
| 20 | Handovers []hostbox.GenerationHandover |
| 21 | Retirements []hostbox.RetirementJournal |
| 22 | Census rootparticipation.Census |
| 23 | Installations []hostguard.FenceView |
| 24 | Launches []hostbox.LaunchInventory |
| 25 | Payloads []hostbox.GenerationPayload |
| 26 | Records []generationRecord |
| 27 | Unlaunched map[string]string |
| 28 | } |
| 29 | type generationCensusReservationsKey struct{} |
| 30 | |
| 31 | // generationCensusParentKey carries the pid whose direct children the |
| 32 | // generation census accepts as this command's own (see generationKernel's |
| 33 | // parent). Only journal-migrate sets it. |
| 34 | type generationCensusParentKey struct{} |
| 35 | |
| 36 | func generationCensusParent(ctx context.Context) int { |
| 37 | pid, _ := ctx.Value(generationCensusParentKey{}).(int) |
| 38 | return pid |
| 39 | } |
| 40 | |
| 41 | type generationReconciler struct { |
| 42 | read func(context.Context) (generationInventory, error) |
| 43 | kernel func(context.Context) (string, string, error) |
| 44 | } |
| 45 | |
| 46 | func generationInventoryDigest(v any) string { |
| 47 | raw, _ := json.Marshal(v) |
| 48 | sum := sha256.Sum256(raw) |
| 49 | return hex.EncodeToString(sum[:]) |
| 50 | } |
| 51 | func generationOwner(t hostguard.FenceTarget) release.GenerationOwner { |
| 52 | return release.GenerationOwner{Host: t.Host, Incarnation: t.Incarnation, Stamp: t.Stamp, Session: t.Session, Box: t.Box, Enrollment: t.Enrollment, BootID: t.BootID, ControllerID: t.ControllerID} |
| 53 | } |
| 54 | func generationInstallation(v hostguard.FenceView, t release.GenerationOwner) (hostguard.RootInstallation, error) { |
| 55 | in := v.Installation |
| 56 | known := in.Incarnation == t.Incarnation && in.Stamp == t.Stamp |
| 57 | for _, old := range v.Retired { |
| 58 | if old.Incarnation == t.Incarnation && old.Stamp == t.Stamp { |
| 59 | known = true |
| 60 | } |
| 61 | } |
| 62 | if !known || in.Host != t.Host || in.Incarnation != t.Incarnation || in.Stamp < t.Stamp || in.Box != t.Box || in.Enrollment != t.Enrollment { |
| 63 | return in, os.ErrPermission |
| 64 | } |
| 65 | in.Stamp = t.Stamp |
| 66 | return in, nil |
| 67 | } |
| 68 | |
| 69 | // Callers hold release exclusion through use. Recheck independent sources after |
| 70 | // kernel inspection; a certificate never substitutes for the next inspection. |
| 71 | func (v generationReconciler) reconcile(ctx context.Context, records []release.GenerationReservation) (release.GenerationEvidence, error) { |
| 72 | var zero release.GenerationEvidence |
| 73 | if v.read == nil || v.kernel == nil { |
| 74 | return zero, os.ErrPermission |
| 75 | } |
| 76 | before, err := v.read(ctx) |
| 77 | if err != nil { |
| 78 | return zero, err |
| 79 | } |
| 80 | c := before.Census |
| 81 | if c.Schema != 1 || !c.Complete || c.NeverEnrolled || (c.Pending != "" && !(c.Pending == "acquisition" && ctx.Value(launchRecoveryCensusKey{}) == true)) || c.Migration == 0 || c.Revision == 0 || c.LaunchRevision == 0 || c.Box == "" || c.Enrollment == "" { |
| 82 | return zero, os.ErrPermission |
| 83 | } |
| 84 | installs := map[string]hostguard.FenceView{} |
| 85 | for _, view := range before.Installations { |
| 86 | in := view.Installation |
| 87 | if _, exists := installs[in.Host]; exists || view.Schema != 1 || view.Host != in.Host || in.Box != c.Box || in.Enrollment != c.Enrollment || in.Migration != c.Migration || in.InventoryRevision == 0 || in.Record != provision.RecordKey(in.Account, in.App, in.Host) { |
| 88 | return zero, os.ErrPermission |
| 89 | } |
| 90 | installs[in.Host] = view |
| 91 | } |
| 92 | if err := generationPayloadBindings(before.Payloads, installs); err != nil { |
| 93 | return zero, err |
| 94 | } |
| 95 | physical, err := generationPhysicalPayloads(ctx, before) |
| 96 | if err != nil { |
| 97 | return zero, err |
| 98 | } |
| 99 | if err := generationPayloadFiles(ctx, dataDir(), physical); err != nil { |
| 100 | return zero, err |
| 101 | } |
| 102 | matched := make([]bool, len(records)) |
| 103 | hosts := map[string]bool{} |
| 104 | for _, launch := range before.Launches { |
| 105 | t := generationOwner(launch.Target) |
| 106 | if _, err := generationInstallation(installs[t.Host], t); err != nil { |
| 107 | return zero, err |
| 108 | } |
| 109 | hosts[t.Host] = true |
| 110 | seen := map[string]bool{} |
| 111 | for _, unit := range launch.Reservations { |
| 112 | if seen[unit.ID] || unit.ID == "" || !hostbox.SameLaunchOwner(unit.Target, launch.Target) { |
| 113 | return zero, os.ErrPermission |
| 114 | } |
| 115 | seen[unit.ID] = true |
| 116 | if !hostbox.IsUnitReservation(unit) { |
| 117 | if !launch.WritersClosed || unit.State != "settled" { |
| 118 | return zero, os.ErrPermission |
| 119 | } |
| 120 | continue |
| 121 | } |
| 122 | count := 0 |
| 123 | for i, r := range records { |
| 124 | b := r.Binding |
| 125 | if b.Target != t || b.Attempt != unit.ID { |
| 126 | continue |
| 127 | } |
| 128 | in, err := generationInstallation(installs[t.Host], t) |
| 129 | if err != nil { |
| 130 | return zero, err |
| 131 | } |
| 132 | if matched[i] || b.Binding.Host != in.Host || b.Binding.Account != in.Account || b.Binding.App != in.App || b.Record != in.Record || b.Installation != rootHistoryInstallation(in) || b.ControllerPID != launch.ControllerPID || b.ControllerStart != launch.ProcessStart || b.Inputs != unit.Inputs || b.Invocation != unit.InvocationID || b.Executable.Device != unit.Executable.Device || b.Executable.Inode != unit.Executable.Inode || unit.Group.RelativePath != generationBindingGroup(b) { |
| 133 | return zero, os.ErrPermission |
| 134 | } |
| 135 | if unit.State != hostbox.UnitIntended && unit.State != hostbox.UnitStarted && unit.State != hostbox.UnitSettled { |
| 136 | return zero, os.ErrPermission |
| 137 | } |
| 138 | p := r.Process |
| 139 | if p != (release.GenerationProcess{}) && (p.PID != unit.PID || p.Start != unit.ProcessStart || p.Group != unit.Group.RelativePath || p.Invocation != unit.Group.InvocationID || p.GroupIdentity.Device != unit.Group.Device || p.GroupIdentity.Inode != unit.Group.Inode) { |
| 140 | return zero, os.ErrPermission |
| 141 | } |
| 142 | if r.Closed && (!launch.WritersClosed || unit.State != hostbox.UnitSettled) { |
| 143 | return zero, os.ErrPermission |
| 144 | } |
| 145 | matched[i] = true |
| 146 | count++ |
| 147 | } |
| 148 | // A closed legacy launch can predate E2, but kernel inspection must still |
| 149 | // exclude its references. An open launch always needs its exact root pin. |
| 150 | if count != 1 && !(count == 0 && launch.WritersClosed && unit.State == hostbox.UnitSettled) { |
| 151 | return zero, os.ErrPermission |
| 152 | } |
| 153 | } |
| 154 | } |
| 155 | for _, view := range before.Installations { |
| 156 | if !view.Installation.Empty && !hosts[view.Host] && before.Unlaunched[view.Host] != rootHistoryInstallation(view.Installation) { |
| 157 | return zero, os.ErrPermission |
| 158 | } |
| 159 | } |
| 160 | for i, r := range records { |
| 161 | if matched[i] { |
| 162 | continue |
| 163 | } |
| 164 | // A pre-intention reservation retains its exact controller journal. |
| 165 | in, err := generationInstallation(installs[r.Binding.Target.Host], r.Binding.Target) |
| 166 | if err != nil || r.Process != (release.GenerationProcess{}) || r.Binding.Installation != rootHistoryInstallation(in) || r.Binding.Binding.Account != in.Account || r.Binding.Binding.App != in.App || r.Binding.Record != in.Record || !hosts[in.Host] { |
| 167 | return zero, os.ErrPermission |
| 168 | } |
| 169 | pending := 0 |
| 170 | for _, launch := range before.Launches { |
| 171 | if generationOwner(launch.Target) == r.Binding.Target && launch.ControllerPID == r.Binding.ControllerPID && launch.ProcessStart == r.Binding.ControllerStart { |
| 172 | if r.Closed && !launch.WritersClosed { |
| 173 | return zero, os.ErrPermission |
| 174 | } |
| 175 | pending++ |
| 176 | } |
| 177 | } |
| 178 | if pending != 1 { |
| 179 | return zero, os.ErrPermission |
| 180 | } |
| 181 | } |
| 182 | snapshotDigest := generationInventoryDigest(before) |
| 183 | boot, kernel, err := v.kernel(context.WithValue(ctx, generationCensusReservationsKey{}, records)) |
| 184 | if err != nil { |
| 185 | return zero, err |
| 186 | } |
| 187 | decoded, err := hex.DecodeString(kernel) |
| 188 | if err != nil || len(decoded) != sha256.Size || hex.EncodeToString(decoded) != kernel || boot == "" { |
| 189 | return zero, os.ErrPermission |
| 190 | } |
| 191 | after, err := v.read(ctx) |
| 192 | if err != nil { |
| 193 | return zero, err |
| 194 | } |
| 195 | if err := ctx.Err(); err != nil { |
| 196 | return zero, err |
| 197 | } |
| 198 | if snapshotDigest != generationInventoryDigest(after) { |
| 199 | return zero, os.ErrPermission |
| 200 | } |
| 201 | physical, err = generationPhysicalPayloads(ctx, after) |
| 202 | if err != nil { |
| 203 | return zero, err |
| 204 | } |
| 205 | if err := generationPayloadFiles(ctx, dataDir(), physical); err != nil { |
| 206 | return zero, err |
| 207 | } |
| 208 | return release.GenerationEvidence{Box: c.Box, Enrollment: c.Enrollment, Migration: c.Migration, Boot: boot, Installations: generationInventoryDigest([]any{before.Installations, before.Payloads, before.Records, before.Retirements, before.Handovers}), Launches: generationInventoryDigest([]any{c.LaunchRevision, before.Launches}), Kernel: kernel}, nil |
| 209 | } |
| 210 | |
| 211 | func generationPayloadBindings(payloads []hostbox.GenerationPayload, installs map[string]hostguard.FenceView) error { |
| 212 | type key struct { |
| 213 | host, incarnation string |
| 214 | stamp uint64 |
| 215 | } |
| 216 | seen := map[key]bool{} |
| 217 | for _, p := range payloads { |
| 218 | in := p.Inventory |
| 219 | view, ok := installs[in.Host] |
| 220 | captured := hostguard.Captured{Incarnation: in.Incarnation, Stamp: in.InstallationStamp} |
| 221 | current := captured.Incarnation == view.Installation.Incarnation && captured.Stamp == view.Installation.Stamp |
| 222 | known := current |
| 223 | for _, old := range view.Retired { |
| 224 | known = known || old == captured |
| 225 | } |
| 226 | k := key{in.Host, in.Incarnation, in.InstallationStamp} |
| 227 | if !ok || !known || seen[k] || !in.Complete || p.Revision == 0 || in.Box != view.Installation.Box || in.Enrollment != view.Installation.Enrollment || in.DirectoryRevision == "" { |
| 228 | return os.ErrPermission |
| 229 | } |
| 230 | if current && (p.Revision != view.Installation.InventoryRevision || view.Installation.Empty != (len(in.Entries) == 0)) { |
| 231 | return os.ErrPermission |
| 232 | } |
| 233 | for _, entry := range in.Entries { |
| 234 | if entry.Materialization != "materialized" && !(entry.Kind == "timer" && entry.Materialization == "intended") { |
| 235 | return os.ErrPermission |
| 236 | } |
| 237 | } |
| 238 | seen[k] = true |
| 239 | } |
| 240 | for host, view := range installs { |
| 241 | in := view.Installation |
| 242 | if !seen[key{host, in.Incarnation, in.Stamp}] { |
| 243 | return os.ErrPermission |
| 244 | } |
| 245 | // Rebind preserves predecessor payload obligations. A current empty |
| 246 | // installation cannot erase the inventory of an older retained stamp. |
| 247 | for _, old := range view.Retired { |
| 248 | if !seen[key{host, old.Incarnation, old.Stamp}] { |
| 249 | return os.ErrPermission |
| 250 | } |
| 251 | } |
| 252 | } |
| 253 | return nil |
| 254 | } |
| 255 | |
| 256 | func productionGenerationInventory(ctx context.Context) (generationInventory, error) { |
| 257 | return readProductionGenerationInventory(ctx, false) |
| 258 | } |
| 259 | |
| 260 | func productionLocalGenerationInventory(ctx context.Context) (generationInventory, error) { |
| 261 | return readProductionGenerationInventory(ctx, true) |
| 262 | } |
| 263 | |
| 264 | func readProductionGenerationInventory(ctx context.Context, local bool) (generationInventory, error) { |
| 265 | snapshot, err := generationInventoryAt(ctx, rootparticipation.Namespace, "/var/lib/carlos-claims/authority/fences", "/var/lib/carlos-claims/journals.db") |
| 266 | if err != nil { |
| 267 | return generationInventory{}, err |
| 268 | } |
| 269 | snapshot.Handovers, err = productionGenerationHandovers(ctx) |
| 270 | if err != nil { |
| 271 | return generationInventory{}, err |
| 272 | } |
| 273 | snapshot.Retirements, err = productionGenerationRetirements(ctx) |
| 274 | if err != nil { |
| 275 | return generationInventory{}, err |
| 276 | } |
| 277 | if len(snapshot.Installations) == 0 { |
| 278 | return productionGenerationRegistryInventory(ctx, snapshot) |
| 279 | } |
| 280 | if local { |
| 281 | snapshot, err = generationLocalObligations(ctx, snapshot, productionGenerationCreation) |
| 282 | if err != nil { |
| 283 | return generationInventory{}, err |
| 284 | } |
| 285 | return productionGenerationRegistryInventory(ctx, snapshot) |
| 286 | } |
| 287 | store, err := openDeployStore(ctx) |
| 288 | if err != nil { |
| 289 | return generationInventory{}, err |
| 290 | } |
| 291 | snapshot, err = generationRequiredInventory(ctx, store, snapshot, productionGenerationCreation) |
| 292 | if err != nil { |
| 293 | return generationInventory{}, err |
| 294 | } |
| 295 | return productionGenerationRegistryInventory(ctx, snapshot) |
| 296 | } |
| 297 | |
| 298 | func generationInventoryAt(ctx context.Context, censusPath, fencesPath, journalPath string) (generationInventory, error) { |
| 299 | var out generationInventory |
| 300 | censusState, err := rootstate.Open(censusPath, false, false) |
| 301 | census := rootparticipation.Ledger{State: censusState} |
| 302 | if err != nil { |
| 303 | return out, err |
| 304 | } |
| 305 | defer census.State.Close() |
| 306 | if ctx.Value(launchRecoveryCensusKey{}) == true { |
| 307 | out.Census, err = census.RecoveryCensus() |
| 308 | } else { |
| 309 | out.Census, err = census.Census() |
| 310 | } |
| 311 | if err != nil { |
| 312 | return out, err |
| 313 | } |
| 314 | state, err := rootstate.Open(fencesPath, false, false) |
| 315 | if err != nil { |
| 316 | return out, err |
| 317 | } |
| 318 | defer state.Close() |
| 319 | out.Installations, err = hostguard.NewRootAuthority(state).GenerationInstallations(ctx) |
| 320 | if err != nil { |
| 321 | return out, err |
| 322 | } |
| 323 | journal, err := openGenerationLaunchInventory(journalPath) |
| 324 | if err != nil { |
| 325 | return out, err |
| 326 | } |
| 327 | defer journal.Close() |
| 328 | out.Launches, err = journal.GenerationLaunches(ctx) |
| 329 | if err != nil { |
| 330 | return out, err |
| 331 | } |
| 332 | out.Payloads, err = journal.GenerationPayloads(ctx) |
| 333 | return out, err |
| 334 | } |
| 335 | |
| 336 | func openGenerationLaunchInventory(path string) (*hostbox.LaunchJournal, error) { |
| 337 | for _, suffix := range []string{"", "-wal", "-shm"} { |
| 338 | file, err := rootstate.OpenAuthorityFile(path + suffix) |
| 339 | if suffix != "" && errors.Is(err, os.ErrNotExist) { |
| 340 | continue |
| 341 | } |
| 342 | if err != nil { |
| 343 | return nil, err |
| 344 | } |
| 345 | file.Close() |
| 346 | } |
| 347 | return hostbox.OpenGenerationLaunchReader(path) |
| 348 | } |
| 349 | |
amadan