| 1 | //go:build linux |
| 2 | |
| 3 | package provisioner |
| 4 | |
| 5 | import ( |
| 6 | "bytes" |
| 7 | "context" |
| 8 | "encoding/base64" |
| 9 | "strings" |
| 10 | |
| 11 | "amadan.net/oficina/home/internal/operator" |
| 12 | family "amadan.net/rastrillo/rastrillo/crypto" |
| 13 | "github.com/go-json-experiment/json" |
| 14 | ) |
| 15 | |
| 16 | // InstallationPlan is local preparation. Persisting it does not enroll a Home |
| 17 | // role, assert fresh owner approval, or permit a remote command. |
| 18 | type InstallationPlan struct { |
| 19 | Version int `json:"version"` |
| 20 | Installation string `json:"installation"` |
| 21 | BaselineOperation string `json:"baseline_operation"` |
| 22 | Credential InstallationTarget `json:"credential"` |
| 23 | Directory InstallationTarget `json:"directory"` |
| 24 | } |
| 25 | type InstallationTarget struct { |
| 26 | Console string `json:"console"` |
| 27 | Account string `json:"account"` |
| 28 | App string `json:"app"` |
| 29 | Host string `json:"host"` |
| 30 | Origin string `json:"origin"` |
| 31 | Release string `json:"release"` |
| 32 | Artifact string `json:"artifact_digest"` |
| 33 | Environment string `json:"environment_digest"` |
| 34 | DataKey string `json:"data_key_fingerprint"` |
| 35 | } |
| 36 | type acceptedHead struct { |
| 37 | Sequence int64 |
| 38 | Head string |
| 39 | } |
| 40 | type installationState struct { |
| 41 | Plan InstallationPlan |
| 42 | Generation string |
| 43 | Heads map[string]acceptedHead |
| 44 | Pending map[string]string |
| 45 | Operations map[string]*preparedOperation |
| 46 | } |
| 47 | type preparedOperation struct { |
| 48 | Request operator.Request |
| 49 | Raw []byte |
| 50 | Status string |
| 51 | Result []byte |
| 52 | } |
| 53 | type installationBook struct { |
| 54 | heads map[string]string |
| 55 | installations map[string]*installationState |
| 56 | events map[string][]byte |
| 57 | records map[string]journalRecord |
| 58 | results map[string][]byte |
| 59 | } |
| 60 | type localTransition struct { |
| 61 | Operation string `json:"operation"` |
| 62 | Kind string `json:"kind"` |
| 63 | ResultRecord string `json:"result_record"` |
| 64 | ResultHead string `json:"result_head"` |
| 65 | } |
| 66 | |
| 67 | func validIdentifier(s string) bool { |
| 68 | if len(s) == 0 || len(s) > 128 { |
| 69 | return false |
| 70 | } |
| 71 | for _, c := range s { |
| 72 | if !(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9' || strings.ContainsRune("_-/.", c)) { |
| 73 | return false |
| 74 | } |
| 75 | } |
| 76 | return !strings.Contains(s, "..") |
| 77 | } |
| 78 | func validHex(s string, n int) bool { |
| 79 | if len(s) != n { |
| 80 | return false |
| 81 | } |
| 82 | for _, c := range s { |
| 83 | if !(c >= '0' && c <= '9' || c >= 'a' && c <= 'f') { |
| 84 | return false |
| 85 | } |
| 86 | } |
| 87 | return true |
| 88 | } |
| 89 | func (p InstallationPlan) valid() bool { |
| 90 | if p.Version != 1 || !operator.CanonicalToken(p.Installation) || !operator.CanonicalToken(p.BaselineOperation) { |
| 91 | return false |
| 92 | } |
| 93 | for _, t := range []InstallationTarget{p.Credential, p.Directory} { |
| 94 | if !operator.Origin(t.Console) || !operator.Origin(t.Origin) || !operator.Origin("https://"+t.Host) || !validIdentifier(t.Account) || !validIdentifier(t.App) || !validHex(t.Release, 40) || !validHex(t.Artifact, 64) || !validHex(t.Environment, 64) || !validHex(t.DataKey, 64) { |
| 95 | return false |
| 96 | } |
| 97 | } |
| 98 | return p.Credential.Origin != p.Directory.Origin && !(p.Credential.Console == p.Directory.Console && p.Credential.Host == p.Directory.Host) |
| 99 | } |
| 100 | func sameTarget(a, b InstallationTarget) bool { |
| 101 | return a.Console == b.Console && a.Host == b.Host |
| 102 | } |
| 103 | func (s *installationState) target(role string) (InstallationTarget, bool) { |
| 104 | switch role { |
| 105 | case "credential": |
| 106 | return s.Plan.Credential, true |
| 107 | case "directory": |
| 108 | return s.Plan.Directory, true |
| 109 | } |
| 110 | return InstallationTarget{}, false |
| 111 | } |
| 112 | func (j *journal) request(s *installationState, raw []byte, action string) (operator.Request, error) { |
| 113 | role := "directory" |
| 114 | if strings.HasPrefix(action, "credential.") { |
| 115 | role = "credential" |
| 116 | } |
| 117 | target, ok := s.target(role) |
| 118 | if !ok { |
| 119 | return operator.Request{}, ErrRefused |
| 120 | } |
| 121 | v, e := operator.NewVerifier(operator.Pins{Role: role, Origin: target.Origin, Installation: s.Plan.Installation, Registry: j.floor.identity.Registry, Device: j.floor.identity.Device, PublicKey: base64.RawURLEncoding.EncodeToString(j.key.SignPub()), Actions: []string{action}}) |
| 122 | if e != nil { |
| 123 | return operator.Request{}, ErrRefused |
| 124 | } |
| 125 | r, e := v.Verify(raw) |
| 126 | if e != nil { |
| 127 | return operator.Request{}, ErrRefused |
| 128 | } |
| 129 | return r, nil |
| 130 | } |
| 131 | func (j *journal) bookLocked() (*installationBook, error) { |
| 132 | if len(j.locks) != 2 { |
| 133 | return nil, ErrRefused |
| 134 | } |
| 135 | if e := j.recover(); e != nil { |
| 136 | return nil, e |
| 137 | } |
| 138 | b := &installationBook{heads: map[string]string{}, installations: map[string]*installationState{}, events: map[string][]byte{}, records: map[string]journalRecord{}, results: map[string][]byte{}} |
| 139 | rows, e := j.db.Query("SELECT CASE WHEN length(signed_record)<=8192 THEN signed_record ELSE NULL END, CASE WHEN length(sealed_payload)<=98304 THEN sealed_payload ELSE NULL END FROM records ORDER BY sequence") |
| 140 | if e != nil { |
| 141 | return nil, ErrUnavailable |
| 142 | } |
| 143 | defer rows.Close() |
| 144 | for rows.Next() { |
| 145 | var raw, sealed []byte |
| 146 | if rows.Scan(&raw, &sealed) != nil { |
| 147 | return nil, ErrUnavailable |
| 148 | } |
| 149 | r, e := j.validate(raw, sealed) |
| 150 | if e != nil { |
| 151 | return nil, e |
| 152 | } |
| 153 | plain, e := family.Open(j.key, payloadContext+"/"+r.Operation, sealed) |
| 154 | if e != nil || len(plain) == 0 || len(plain) > 64<<10 { |
| 155 | return nil, ErrRefused |
| 156 | } |
| 157 | if e = j.replay(b, r, plain); e != nil { |
| 158 | return nil, e |
| 159 | } |
| 160 | b.events[r.Operation] = plain |
| 161 | b.records[r.Operation] = r |
| 162 | b.heads[r.Operation] = hash(raw) |
| 163 | } |
| 164 | if rows.Err() != nil { |
| 165 | return nil, ErrUnavailable |
| 166 | } |
| 167 | return b, nil |
| 168 | } |
| 169 | func (j *journal) replay(b *installationBook, r journalRecord, plain []byte) error { |
| 170 | s := b.installations[r.Installation] |
| 171 | if r.Action == "provisioner.enroll" { |
| 172 | var p InstallationPlan |
| 173 | if s != nil || r.Expected != "absent" || closedJSON(plain, &p) != nil || !p.valid() || p.Installation != r.Installation || p.BaselineOperation != r.Operation { |
| 174 | return ErrRefused |
| 175 | } |
| 176 | for _, old := range b.installations { |
| 177 | for _, a := range []InstallationTarget{old.Plan.Credential, old.Plan.Directory} { |
| 178 | if sameTarget(a, p.Credential) || sameTarget(a, p.Directory) { |
| 179 | return ErrRefused |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | b.installations[p.Installation] = &installationState{p, "", map[string]acceptedHead{}, map[string]string{}, map[string]*preparedOperation{}} |
| 184 | return nil |
| 185 | } |
| 186 | if s == nil { |
| 187 | return ErrRefused |
| 188 | } |
| 189 | if r.Expected == "prepared" && !strings.HasPrefix(r.Action, "provisioner.") { |
| 190 | req, e := j.request(s, plain, r.Action) |
| 191 | if e != nil { |
| 192 | return e |
| 193 | } |
| 194 | a := req.Authorization() |
| 195 | if a.Role == "directory" && ((s.Generation == "" && a.Action != "directory.initialize") || (s.Generation != "" && a.Action == "directory.initialize")) { |
| 196 | return ErrRefused |
| 197 | } |
| 198 | head := s.Heads[a.Role] |
| 199 | if a.OperationID != r.Operation || a.JournalSequence != r.Sequence || a.Sequence != head.Sequence+1 || a.Previous != head.Head || s.Pending[a.Role] != "" || s.Operations[a.OperationID] != nil || r.Created < a.Issued || r.Created >= a.Expires { |
| 200 | return ErrRefused |
| 201 | } |
| 202 | s.Operations[a.OperationID] = &preparedOperation{req, append([]byte(nil), plain...), "prepared", nil} |
| 203 | s.Pending[a.Role] = a.OperationID |
| 204 | return nil |
| 205 | } |
| 206 | if r.Action == "provisioner.result" { |
| 207 | if r.Expected != "in-flight" { |
| 208 | return ErrRefused |
| 209 | } |
| 210 | var out operator.Result |
| 211 | if decodeOperatorResult(plain, &out) != nil || out.Version != 1 || out.Outcome != "committed" { |
| 212 | return ErrRefused |
| 213 | } |
| 214 | pending := s.Operations[out.OperationID] |
| 215 | if pending == nil || (pending.Status != "in-flight" && pending.Status != "ambiguous") { |
| 216 | return ErrRefused |
| 217 | } |
| 218 | b.results[r.Operation] = append([]byte(nil), plain...) |
| 219 | return nil |
| 220 | } |
| 221 | var tr localTransition |
| 222 | if closedJSON(plain, &tr) != nil || !operator.CanonicalToken(tr.Operation) { |
| 223 | return ErrRefused |
| 224 | } |
| 225 | op := s.Operations[tr.Operation] |
| 226 | if op == nil { |
| 227 | return ErrRefused |
| 228 | } |
| 229 | a := op.Request.Authorization() |
| 230 | if r.Action == "provisioner.in-flight" { |
| 231 | if r.Expected != "prepared" || tr.Kind != "in-flight" || (tr.ResultRecord != "" || tr.ResultHead != "") || op.Status != "prepared" || r.Created >= a.Expires || r.Created < a.Issued { |
| 232 | return ErrRefused |
| 233 | } |
| 234 | op.Status = "in-flight" |
| 235 | return nil |
| 236 | } |
| 237 | if r.Action != "provisioner.outcome" || r.Expected != "in-flight" || (op.Status != "in-flight" && op.Status != "ambiguous") { |
| 238 | return ErrRefused |
| 239 | } |
| 240 | switch tr.Kind { |
| 241 | case "ambiguous": |
| 242 | if tr.ResultRecord != "" || tr.ResultHead != "" { |
| 243 | return ErrRefused |
| 244 | } |
| 245 | op.Status = "ambiguous" |
| 246 | case "refused": |
| 247 | if (tr.ResultRecord != "" || tr.ResultHead != "") || r.Created < a.Expires || op.Status == "ambiguous" { |
| 248 | return ErrRefused |
| 249 | } |
| 250 | op.Status = "refused" |
| 251 | delete(s.Pending, a.Role) |
| 252 | case "accepted": |
| 253 | result, ok := b.results[tr.ResultRecord] |
| 254 | rr := b.records[tr.ResultRecord] |
| 255 | if !ok || rr.Installation != r.Installation || rr.Action != "provisioner.result" || !operator.CanonicalToken(tr.ResultHead) || b.heads[tr.ResultRecord] != tr.ResultHead { |
| 256 | return ErrRefused |
| 257 | } |
| 258 | var out operator.Result |
| 259 | if decodeOperatorResult(result, &out) != nil || out.Version != 1 || out.OperationID != a.OperationID || out.Outcome != "committed" { |
| 260 | return ErrRefused |
| 261 | } |
| 262 | if a.Action == "directory.initialize" { |
| 263 | var input operator.InitializeInput |
| 264 | if operator.DecodeInput(op.Request, &input) != nil || s.Generation != "" || !operator.CanonicalToken(input.Generation) || out.Generation != input.Generation { |
| 265 | return ErrRefused |
| 266 | } |
| 267 | s.Generation = out.Generation |
| 268 | } |
| 269 | if a.Action != "directory.initialize" && out.Generation != "" && out.Generation != s.Generation { |
| 270 | return ErrRefused |
| 271 | } |
| 272 | s.Heads[a.Role] = acceptedHead{a.Sequence, op.Request.Head()} |
| 273 | delete(s.Pending, a.Role) |
| 274 | op.Status = "accepted" |
| 275 | op.Result = append([]byte(nil), result...) |
| 276 | default: |
| 277 | return ErrRefused |
| 278 | } |
| 279 | return nil |
| 280 | } |
| 281 | func (j *journal) enroll(ctx context.Context, p InstallationPlan) error { |
| 282 | if !p.valid() { |
| 283 | return ErrRefused |
| 284 | } |
| 285 | raw, e := canonicalJSON(p) |
| 286 | if e != nil { |
| 287 | return e |
| 288 | } |
| 289 | j.mu.Lock() |
| 290 | defer j.mu.Unlock() |
| 291 | b, e := j.bookLocked() |
| 292 | if e != nil { |
| 293 | return e |
| 294 | } |
| 295 | if old, ok := b.events[p.BaselineOperation]; ok { |
| 296 | if b.records[p.BaselineOperation].Action != "provisioner.enroll" || !bytes.Equal(old, raw) { |
| 297 | return ErrRefused |
| 298 | } |
| 299 | return nil |
| 300 | } |
| 301 | next, _, e := j.floor.current() |
| 302 | if e != nil { |
| 303 | return e |
| 304 | } |
| 305 | r := journalRecord{Installation: p.Installation, Operation: p.BaselineOperation, Action: "provisioner.enroll", Expected: "absent", Sequence: next.Sequence + 1, Created: j.now().Unix()} |
| 306 | if e = j.replay(b, r, raw); e != nil { |
| 307 | return e |
| 308 | } |
| 309 | _, e = j.appendAtLocked(ctx, p.Installation, p.BaselineOperation, r.Action, r.Expected, raw, r.Created) |
| 310 | return e |
| 311 | } |
| 312 | func (j *journal) prepare(ctx context.Context, id, op, action string, input any) ([]byte, error) { |
| 313 | j.mu.Lock() |
| 314 | defer j.mu.Unlock() |
| 315 | b, e := j.bookLocked() |
| 316 | if e != nil { |
| 317 | return nil, e |
| 318 | } |
| 319 | s := b.installations[id] |
| 320 | if s == nil || !operator.CanonicalToken(op) { |
| 321 | return nil, ErrRefused |
| 322 | } |
| 323 | if old := s.Operations[op]; old != nil { |
| 324 | a := old.Request.Authorization() |
| 325 | if a.Action != action { |
| 326 | return nil, ErrRefused |
| 327 | } |
| 328 | raw, e := operator.SignRequest(j.key, a, input) |
| 329 | if e != nil || !bytes.Equal(raw, old.Raw) { |
| 330 | // ECDSA signing may randomize the envelope. Compare verified exact input. |
| 331 | if e != nil { |
| 332 | return nil, ErrRefused |
| 333 | } |
| 334 | req, e := j.request(s, raw, action) |
| 335 | if e != nil || !bytes.Equal(req.Input(), old.Request.Input()) { |
| 336 | return nil, ErrRefused |
| 337 | } |
| 338 | } |
| 339 | return append([]byte(nil), old.Raw...), nil |
| 340 | } |
| 341 | role := "directory" |
| 342 | if strings.HasPrefix(action, "credential.") { |
| 343 | role = "credential" |
| 344 | } |
| 345 | target, ok := s.target(role) |
| 346 | if !ok || s.Pending[role] != "" { |
| 347 | return nil, ErrRefused |
| 348 | } |
| 349 | point, _, e := j.floor.current() |
| 350 | if e != nil { |
| 351 | return nil, e |
| 352 | } |
| 353 | head := s.Heads[role] |
| 354 | issued := j.now().Unix() |
| 355 | a := operator.Authorization{Version: 1, Purpose: "operator-input", Role: role, Origin: target.Origin, Installation: id, Registry: j.floor.identity.Registry, Device: j.floor.identity.Device, Sequence: head.Sequence + 1, Initial: head.Sequence == 0, Previous: head.Head, JournalSequence: point.Sequence + 1, OperationID: op, Action: action, Issued: issued, Expires: issued + 300} |
| 356 | raw, e := operator.SignRequest(j.key, a, input) |
| 357 | if e != nil { |
| 358 | return nil, ErrRefused |
| 359 | } |
| 360 | r := journalRecord{Installation: id, Operation: op, Action: action, Expected: "prepared", Sequence: point.Sequence + 1, Created: issued} |
| 361 | if e = j.replay(b, r, raw); e != nil { |
| 362 | return nil, e |
| 363 | } |
| 364 | if _, e = j.appendAtLocked(ctx, id, op, action, "prepared", raw, r.Created); e != nil { |
| 365 | return nil, e |
| 366 | } |
| 367 | return raw, nil |
| 368 | } |
| 369 | func (j *journal) markInFlight(ctx context.Context, id, event, op string) error { |
| 370 | tr := localTransition{Operation: op, Kind: "in-flight"} |
| 371 | return j.transition(ctx, id, event, "provisioner.in-flight", "prepared", tr) |
| 372 | } |
| 373 | |
| 374 | // transition is internal journal machinery. Production outcome calls must be |
| 375 | // supplied by the future authenticated console adapter; no CLI outcome path |
| 376 | // or worker-authentication substitute is implemented here. |
| 377 | func (j *journal) transition(ctx context.Context, id, event, action, expected string, tr localTransition) error { |
| 378 | raw, e := canonicalJSON(tr) |
| 379 | if e != nil { |
| 380 | return e |
| 381 | } |
| 382 | j.mu.Lock() |
| 383 | defer j.mu.Unlock() |
| 384 | b, e := j.bookLocked() |
| 385 | if e != nil { |
| 386 | return e |
| 387 | } |
| 388 | if old, ok := b.events[event]; ok { |
| 389 | r := b.records[event] |
| 390 | if r.Installation != id || r.Action != action || r.Expected != expected || !bytes.Equal(old, raw) { |
| 391 | return ErrRefused |
| 392 | } |
| 393 | return nil |
| 394 | } |
| 395 | r := journalRecord{Installation: id, Operation: event, Action: action, Expected: expected, Created: j.now().Unix()} |
| 396 | if e = j.replay(b, r, raw); e != nil { |
| 397 | return e |
| 398 | } |
| 399 | _, e = j.appendAtLocked(ctx, id, event, action, expected, raw, r.Created) |
| 400 | return e |
| 401 | } |
| 402 | |
| 403 | type EnrollmentInfo struct { |
| 404 | RegistryInfo |
| 405 | Installation string `json:"installation"` |
| 406 | State string `json:"state"` |
| 407 | } |
| 408 | |
| 409 | // EnrollPlan records private local preparation only. Remote enrollment and owner |
| 410 | // approval remain separate steps with no dispatcher in this package. |
| 411 | func EnrollPlan(statePath, floorPath string, password, raw []byte) (EnrollmentInfo, error) { |
| 412 | var p InstallationPlan |
| 413 | if len(raw) > 64<<10 || json.Unmarshal(raw, &p, json.RejectUnknownMembers(true)) != nil || !p.valid() { |
| 414 | return EnrollmentInfo{}, ErrRefused |
| 415 | } |
| 416 | j, e := existingJournal(statePath, floorPath, password) |
| 417 | if e != nil { |
| 418 | return EnrollmentInfo{}, e |
| 419 | } |
| 420 | defer closeExisting(j) |
| 421 | if e = j.enroll(context.Background(), p); e != nil { |
| 422 | return EnrollmentInfo{}, e |
| 423 | } |
| 424 | point, _, e := j.floor.current() |
| 425 | if e != nil { |
| 426 | return EnrollmentInfo{}, e |
| 427 | } |
| 428 | return EnrollmentInfo{RegistryInfo{j.floor.identity.Registry, j.floor.identity.Device, j.floor.identity.Public, point.Sequence}, p.Installation, "local-plan"}, nil |
| 429 | } |
| 430 | |
| 431 | func decodeOperatorResult(raw []byte, out *operator.Result) error { |
| 432 | if len(raw) == 0 || len(raw) > operator.BodyLimit || json.Unmarshal(raw, out, json.RejectUnknownMembers(true)) != nil { |
| 433 | return ErrRefused |
| 434 | } |
| 435 | encoded, e := json.Marshal(out, json.Deterministic(true)) |
| 436 | if e != nil || !bytes.Equal(encoded, raw) { |
| 437 | return ErrRefused |
| 438 | } |
| 439 | return nil |
| 440 | } |
| 441 | |
amadan