khenaidoo | d948f77 | 2021-08-11 17:49:24 -0400 | [diff] [blame] | 1 | // Copyright 2015 The etcd Authors |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | // Package auth implements etcd authentication. |
| 16 | package auth |
| 17 | |
| 18 | import ( |
| 19 | "context" |
| 20 | "encoding/json" |
| 21 | "fmt" |
| 22 | "net/http" |
| 23 | "path" |
| 24 | "reflect" |
| 25 | "sort" |
| 26 | "strings" |
| 27 | "time" |
| 28 | |
| 29 | etcderr "github.com/coreos/etcd/error" |
| 30 | "github.com/coreos/etcd/etcdserver" |
| 31 | "github.com/coreos/etcd/etcdserver/etcdserverpb" |
| 32 | "github.com/coreos/etcd/pkg/types" |
| 33 | "github.com/coreos/pkg/capnslog" |
| 34 | |
| 35 | "golang.org/x/crypto/bcrypt" |
| 36 | ) |
| 37 | |
| 38 | const ( |
| 39 | // StorePermsPrefix is the internal prefix of the storage layer dedicated to storing user data. |
| 40 | StorePermsPrefix = "/2" |
| 41 | |
| 42 | // RootRoleName is the name of the ROOT role, with privileges to manage the cluster. |
| 43 | RootRoleName = "root" |
| 44 | |
| 45 | // GuestRoleName is the name of the role that defines the privileges of an unauthenticated user. |
| 46 | GuestRoleName = "guest" |
| 47 | ) |
| 48 | |
| 49 | var ( |
| 50 | plog = capnslog.NewPackageLogger("github.com/coreos/etcd", "etcdserver/auth") |
| 51 | ) |
| 52 | |
| 53 | var rootRole = Role{ |
| 54 | Role: RootRoleName, |
| 55 | Permissions: Permissions{ |
| 56 | KV: RWPermission{ |
| 57 | Read: []string{"/*"}, |
| 58 | Write: []string{"/*"}, |
| 59 | }, |
| 60 | }, |
| 61 | } |
| 62 | |
| 63 | var guestRole = Role{ |
| 64 | Role: GuestRoleName, |
| 65 | Permissions: Permissions{ |
| 66 | KV: RWPermission{ |
| 67 | Read: []string{"/*"}, |
| 68 | Write: []string{"/*"}, |
| 69 | }, |
| 70 | }, |
| 71 | } |
| 72 | |
| 73 | type doer interface { |
| 74 | Do(context.Context, etcdserverpb.Request) (etcdserver.Response, error) |
| 75 | } |
| 76 | |
| 77 | type Store interface { |
| 78 | AllUsers() ([]string, error) |
| 79 | GetUser(name string) (User, error) |
| 80 | CreateOrUpdateUser(user User) (out User, created bool, err error) |
| 81 | CreateUser(user User) (User, error) |
| 82 | DeleteUser(name string) error |
| 83 | UpdateUser(user User) (User, error) |
| 84 | AllRoles() ([]string, error) |
| 85 | GetRole(name string) (Role, error) |
| 86 | CreateRole(role Role) error |
| 87 | DeleteRole(name string) error |
| 88 | UpdateRole(role Role) (Role, error) |
| 89 | AuthEnabled() bool |
| 90 | EnableAuth() error |
| 91 | DisableAuth() error |
| 92 | PasswordStore |
| 93 | } |
| 94 | |
| 95 | type PasswordStore interface { |
| 96 | CheckPassword(user User, password string) bool |
| 97 | HashPassword(password string) (string, error) |
| 98 | } |
| 99 | |
| 100 | type store struct { |
| 101 | server doer |
| 102 | timeout time.Duration |
| 103 | ensuredOnce bool |
| 104 | |
| 105 | PasswordStore |
| 106 | } |
| 107 | |
| 108 | type User struct { |
| 109 | User string `json:"user"` |
| 110 | Password string `json:"password,omitempty"` |
| 111 | Roles []string `json:"roles"` |
| 112 | Grant []string `json:"grant,omitempty"` |
| 113 | Revoke []string `json:"revoke,omitempty"` |
| 114 | } |
| 115 | |
| 116 | type Role struct { |
| 117 | Role string `json:"role"` |
| 118 | Permissions Permissions `json:"permissions"` |
| 119 | Grant *Permissions `json:"grant,omitempty"` |
| 120 | Revoke *Permissions `json:"revoke,omitempty"` |
| 121 | } |
| 122 | |
| 123 | type Permissions struct { |
| 124 | KV RWPermission `json:"kv"` |
| 125 | } |
| 126 | |
| 127 | func (p *Permissions) IsEmpty() bool { |
| 128 | return p == nil || (len(p.KV.Read) == 0 && len(p.KV.Write) == 0) |
| 129 | } |
| 130 | |
| 131 | type RWPermission struct { |
| 132 | Read []string `json:"read"` |
| 133 | Write []string `json:"write"` |
| 134 | } |
| 135 | |
| 136 | type Error struct { |
| 137 | Status int |
| 138 | Errmsg string |
| 139 | } |
| 140 | |
| 141 | func (ae Error) Error() string { return ae.Errmsg } |
| 142 | func (ae Error) HTTPStatus() int { return ae.Status } |
| 143 | |
| 144 | func authErr(hs int, s string, v ...interface{}) Error { |
| 145 | return Error{Status: hs, Errmsg: fmt.Sprintf("auth: "+s, v...)} |
| 146 | } |
| 147 | |
| 148 | func NewStore(server doer, timeout time.Duration) Store { |
| 149 | s := &store{ |
| 150 | server: server, |
| 151 | timeout: timeout, |
| 152 | PasswordStore: passwordStore{}, |
| 153 | } |
| 154 | return s |
| 155 | } |
| 156 | |
| 157 | // passwordStore implements PasswordStore using bcrypt to hash user passwords |
| 158 | type passwordStore struct{} |
| 159 | |
| 160 | func (_ passwordStore) CheckPassword(user User, password string) bool { |
| 161 | err := bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(password)) |
| 162 | return err == nil |
| 163 | } |
| 164 | |
| 165 | func (_ passwordStore) HashPassword(password string) (string, error) { |
| 166 | hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost) |
| 167 | return string(hash), err |
| 168 | } |
| 169 | |
| 170 | func (s *store) AllUsers() ([]string, error) { |
| 171 | resp, err := s.requestResource("/users/", false, false) |
| 172 | if err != nil { |
| 173 | if e, ok := err.(*etcderr.Error); ok { |
| 174 | if e.ErrorCode == etcderr.EcodeKeyNotFound { |
| 175 | return []string{}, nil |
| 176 | } |
| 177 | } |
| 178 | return nil, err |
| 179 | } |
| 180 | var nodes []string |
| 181 | for _, n := range resp.Event.Node.Nodes { |
| 182 | _, user := path.Split(n.Key) |
| 183 | nodes = append(nodes, user) |
| 184 | } |
| 185 | sort.Strings(nodes) |
| 186 | return nodes, nil |
| 187 | } |
| 188 | |
| 189 | func (s *store) GetUser(name string) (User, error) { return s.getUser(name, false) } |
| 190 | |
| 191 | // CreateOrUpdateUser should be only used for creating the new user or when you are not |
| 192 | // sure if it is a create or update. (When only password is passed in, we are not sure |
| 193 | // if it is a update or create) |
| 194 | func (s *store) CreateOrUpdateUser(user User) (out User, created bool, err error) { |
| 195 | _, err = s.getUser(user.User, true) |
| 196 | if err == nil { |
| 197 | out, err = s.UpdateUser(user) |
| 198 | return out, false, err |
| 199 | } |
| 200 | u, err := s.CreateUser(user) |
| 201 | return u, true, err |
| 202 | } |
| 203 | |
| 204 | func (s *store) CreateUser(user User) (User, error) { |
| 205 | // Attach root role to root user. |
| 206 | if user.User == "root" { |
| 207 | user = attachRootRole(user) |
| 208 | } |
| 209 | u, err := s.createUserInternal(user) |
| 210 | if err == nil { |
| 211 | plog.Noticef("created user %s", user.User) |
| 212 | } |
| 213 | return u, err |
| 214 | } |
| 215 | |
| 216 | func (s *store) createUserInternal(user User) (User, error) { |
| 217 | if user.Password == "" { |
| 218 | return user, authErr(http.StatusBadRequest, "Cannot create user %s with an empty password", user.User) |
| 219 | } |
| 220 | hash, err := s.HashPassword(user.Password) |
| 221 | if err != nil { |
| 222 | return user, err |
| 223 | } |
| 224 | user.Password = hash |
| 225 | |
| 226 | _, err = s.createResource("/users/"+user.User, user) |
| 227 | if err != nil { |
| 228 | if e, ok := err.(*etcderr.Error); ok { |
| 229 | if e.ErrorCode == etcderr.EcodeNodeExist { |
| 230 | return user, authErr(http.StatusConflict, "User %s already exists.", user.User) |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | return user, err |
| 235 | } |
| 236 | |
| 237 | func (s *store) DeleteUser(name string) error { |
| 238 | if s.AuthEnabled() && name == "root" { |
| 239 | return authErr(http.StatusForbidden, "Cannot delete root user while auth is enabled.") |
| 240 | } |
| 241 | _, err := s.deleteResource("/users/" + name) |
| 242 | if err != nil { |
| 243 | if e, ok := err.(*etcderr.Error); ok { |
| 244 | if e.ErrorCode == etcderr.EcodeKeyNotFound { |
| 245 | return authErr(http.StatusNotFound, "User %s does not exist", name) |
| 246 | } |
| 247 | } |
| 248 | return err |
| 249 | } |
| 250 | plog.Noticef("deleted user %s", name) |
| 251 | return nil |
| 252 | } |
| 253 | |
| 254 | func (s *store) UpdateUser(user User) (User, error) { |
| 255 | old, err := s.getUser(user.User, true) |
| 256 | if err != nil { |
| 257 | if e, ok := err.(*etcderr.Error); ok { |
| 258 | if e.ErrorCode == etcderr.EcodeKeyNotFound { |
| 259 | return user, authErr(http.StatusNotFound, "User %s doesn't exist.", user.User) |
| 260 | } |
| 261 | } |
| 262 | return old, err |
| 263 | } |
| 264 | |
| 265 | newUser, err := old.merge(user, s.PasswordStore) |
| 266 | if err != nil { |
| 267 | return old, err |
| 268 | } |
| 269 | if reflect.DeepEqual(old, newUser) { |
| 270 | return old, authErr(http.StatusBadRequest, "User not updated. Use grant/revoke/password to update the user.") |
| 271 | } |
| 272 | _, err = s.updateResource("/users/"+user.User, newUser) |
| 273 | if err == nil { |
| 274 | plog.Noticef("updated user %s", user.User) |
| 275 | } |
| 276 | return newUser, err |
| 277 | } |
| 278 | |
| 279 | func (s *store) AllRoles() ([]string, error) { |
| 280 | nodes := []string{RootRoleName} |
| 281 | resp, err := s.requestResource("/roles/", false, false) |
| 282 | if err != nil { |
| 283 | if e, ok := err.(*etcderr.Error); ok { |
| 284 | if e.ErrorCode == etcderr.EcodeKeyNotFound { |
| 285 | return nodes, nil |
| 286 | } |
| 287 | } |
| 288 | return nil, err |
| 289 | } |
| 290 | for _, n := range resp.Event.Node.Nodes { |
| 291 | _, role := path.Split(n.Key) |
| 292 | nodes = append(nodes, role) |
| 293 | } |
| 294 | sort.Strings(nodes) |
| 295 | return nodes, nil |
| 296 | } |
| 297 | |
| 298 | func (s *store) GetRole(name string) (Role, error) { return s.getRole(name, false) } |
| 299 | |
| 300 | func (s *store) CreateRole(role Role) error { |
| 301 | if role.Role == RootRoleName { |
| 302 | return authErr(http.StatusForbidden, "Cannot modify role %s: is root role.", role.Role) |
| 303 | } |
| 304 | _, err := s.createResource("/roles/"+role.Role, role) |
| 305 | if err != nil { |
| 306 | if e, ok := err.(*etcderr.Error); ok { |
| 307 | if e.ErrorCode == etcderr.EcodeNodeExist { |
| 308 | return authErr(http.StatusConflict, "Role %s already exists.", role.Role) |
| 309 | } |
| 310 | } |
| 311 | } |
| 312 | if err == nil { |
| 313 | plog.Noticef("created new role %s", role.Role) |
| 314 | } |
| 315 | return err |
| 316 | } |
| 317 | |
| 318 | func (s *store) DeleteRole(name string) error { |
| 319 | if name == RootRoleName { |
| 320 | return authErr(http.StatusForbidden, "Cannot modify role %s: is root role.", name) |
| 321 | } |
| 322 | _, err := s.deleteResource("/roles/" + name) |
| 323 | if err != nil { |
| 324 | if e, ok := err.(*etcderr.Error); ok { |
| 325 | if e.ErrorCode == etcderr.EcodeKeyNotFound { |
| 326 | return authErr(http.StatusNotFound, "Role %s doesn't exist.", name) |
| 327 | } |
| 328 | } |
| 329 | } |
| 330 | if err == nil { |
| 331 | plog.Noticef("deleted role %s", name) |
| 332 | } |
| 333 | return err |
| 334 | } |
| 335 | |
| 336 | func (s *store) UpdateRole(role Role) (Role, error) { |
| 337 | if role.Role == RootRoleName { |
| 338 | return Role{}, authErr(http.StatusForbidden, "Cannot modify role %s: is root role.", role.Role) |
| 339 | } |
| 340 | old, err := s.getRole(role.Role, true) |
| 341 | if err != nil { |
| 342 | if e, ok := err.(*etcderr.Error); ok { |
| 343 | if e.ErrorCode == etcderr.EcodeKeyNotFound { |
| 344 | return role, authErr(http.StatusNotFound, "Role %s doesn't exist.", role.Role) |
| 345 | } |
| 346 | } |
| 347 | return old, err |
| 348 | } |
| 349 | newRole, err := old.merge(role) |
| 350 | if err != nil { |
| 351 | return old, err |
| 352 | } |
| 353 | if reflect.DeepEqual(old, newRole) { |
| 354 | return old, authErr(http.StatusBadRequest, "Role not updated. Use grant/revoke to update the role.") |
| 355 | } |
| 356 | _, err = s.updateResource("/roles/"+role.Role, newRole) |
| 357 | if err == nil { |
| 358 | plog.Noticef("updated role %s", role.Role) |
| 359 | } |
| 360 | return newRole, err |
| 361 | } |
| 362 | |
| 363 | func (s *store) AuthEnabled() bool { |
| 364 | return s.detectAuth() |
| 365 | } |
| 366 | |
| 367 | func (s *store) EnableAuth() error { |
| 368 | if s.AuthEnabled() { |
| 369 | return authErr(http.StatusConflict, "already enabled") |
| 370 | } |
| 371 | |
| 372 | if _, err := s.getUser("root", true); err != nil { |
| 373 | return authErr(http.StatusConflict, "No root user available, please create one") |
| 374 | } |
| 375 | if _, err := s.getRole(GuestRoleName, true); err != nil { |
| 376 | plog.Printf("no guest role access found, creating default") |
| 377 | if err := s.CreateRole(guestRole); err != nil { |
| 378 | plog.Errorf("error creating guest role. aborting auth enable.") |
| 379 | return err |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | if err := s.enableAuth(); err != nil { |
| 384 | plog.Errorf("error enabling auth (%v)", err) |
| 385 | return err |
| 386 | } |
| 387 | |
| 388 | plog.Noticef("auth: enabled auth") |
| 389 | return nil |
| 390 | } |
| 391 | |
| 392 | func (s *store) DisableAuth() error { |
| 393 | if !s.AuthEnabled() { |
| 394 | return authErr(http.StatusConflict, "already disabled") |
| 395 | } |
| 396 | |
| 397 | err := s.disableAuth() |
| 398 | if err == nil { |
| 399 | plog.Noticef("auth: disabled auth") |
| 400 | } else { |
| 401 | plog.Errorf("error disabling auth (%v)", err) |
| 402 | } |
| 403 | return err |
| 404 | } |
| 405 | |
| 406 | // merge applies the properties of the passed-in User to the User on which it |
| 407 | // is called and returns a new User with these modifications applied. Think of |
| 408 | // all Users as immutable sets of data. Merge allows you to perform the set |
| 409 | // operations (desired grants and revokes) atomically |
| 410 | func (ou User) merge(nu User, s PasswordStore) (User, error) { |
| 411 | var out User |
| 412 | if ou.User != nu.User { |
| 413 | return out, authErr(http.StatusConflict, "Merging user data with conflicting usernames: %s %s", ou.User, nu.User) |
| 414 | } |
| 415 | out.User = ou.User |
| 416 | if nu.Password != "" { |
| 417 | hash, err := s.HashPassword(nu.Password) |
| 418 | if err != nil { |
| 419 | return ou, err |
| 420 | } |
| 421 | out.Password = hash |
| 422 | } else { |
| 423 | out.Password = ou.Password |
| 424 | } |
| 425 | currentRoles := types.NewUnsafeSet(ou.Roles...) |
| 426 | for _, g := range nu.Grant { |
| 427 | if currentRoles.Contains(g) { |
| 428 | plog.Noticef("granting duplicate role %s for user %s", g, nu.User) |
| 429 | return User{}, authErr(http.StatusConflict, fmt.Sprintf("Granting duplicate role %s for user %s", g, nu.User)) |
| 430 | } |
| 431 | currentRoles.Add(g) |
| 432 | } |
| 433 | for _, r := range nu.Revoke { |
| 434 | if !currentRoles.Contains(r) { |
| 435 | plog.Noticef("revoking ungranted role %s for user %s", r, nu.User) |
| 436 | return User{}, authErr(http.StatusConflict, fmt.Sprintf("Revoking ungranted role %s for user %s", r, nu.User)) |
| 437 | } |
| 438 | currentRoles.Remove(r) |
| 439 | } |
| 440 | out.Roles = currentRoles.Values() |
| 441 | sort.Strings(out.Roles) |
| 442 | return out, nil |
| 443 | } |
| 444 | |
| 445 | // merge for a role works the same as User above -- atomic Role application to |
| 446 | // each of the substructures. |
| 447 | func (r Role) merge(n Role) (Role, error) { |
| 448 | var out Role |
| 449 | var err error |
| 450 | if r.Role != n.Role { |
| 451 | return out, authErr(http.StatusConflict, "Merging role with conflicting names: %s %s", r.Role, n.Role) |
| 452 | } |
| 453 | out.Role = r.Role |
| 454 | out.Permissions, err = r.Permissions.Grant(n.Grant) |
| 455 | if err != nil { |
| 456 | return out, err |
| 457 | } |
| 458 | out.Permissions, err = out.Permissions.Revoke(n.Revoke) |
| 459 | return out, err |
| 460 | } |
| 461 | |
| 462 | func (r Role) HasKeyAccess(key string, write bool) bool { |
| 463 | if r.Role == RootRoleName { |
| 464 | return true |
| 465 | } |
| 466 | return r.Permissions.KV.HasAccess(key, write) |
| 467 | } |
| 468 | |
| 469 | func (r Role) HasRecursiveAccess(key string, write bool) bool { |
| 470 | if r.Role == RootRoleName { |
| 471 | return true |
| 472 | } |
| 473 | return r.Permissions.KV.HasRecursiveAccess(key, write) |
| 474 | } |
| 475 | |
| 476 | // Grant adds a set of permissions to the permission object on which it is called, |
| 477 | // returning a new permission object. |
| 478 | func (p Permissions) Grant(n *Permissions) (Permissions, error) { |
| 479 | var out Permissions |
| 480 | var err error |
| 481 | if n == nil { |
| 482 | return p, nil |
| 483 | } |
| 484 | out.KV, err = p.KV.Grant(n.KV) |
| 485 | return out, err |
| 486 | } |
| 487 | |
| 488 | // Revoke removes a set of permissions to the permission object on which it is called, |
| 489 | // returning a new permission object. |
| 490 | func (p Permissions) Revoke(n *Permissions) (Permissions, error) { |
| 491 | var out Permissions |
| 492 | var err error |
| 493 | if n == nil { |
| 494 | return p, nil |
| 495 | } |
| 496 | out.KV, err = p.KV.Revoke(n.KV) |
| 497 | return out, err |
| 498 | } |
| 499 | |
| 500 | // Grant adds a set of permissions to the permission object on which it is called, |
| 501 | // returning a new permission object. |
| 502 | func (rw RWPermission) Grant(n RWPermission) (RWPermission, error) { |
| 503 | var out RWPermission |
| 504 | currentRead := types.NewUnsafeSet(rw.Read...) |
| 505 | for _, r := range n.Read { |
| 506 | if currentRead.Contains(r) { |
| 507 | return out, authErr(http.StatusConflict, "Granting duplicate read permission %s", r) |
| 508 | } |
| 509 | currentRead.Add(r) |
| 510 | } |
| 511 | currentWrite := types.NewUnsafeSet(rw.Write...) |
| 512 | for _, w := range n.Write { |
| 513 | if currentWrite.Contains(w) { |
| 514 | return out, authErr(http.StatusConflict, "Granting duplicate write permission %s", w) |
| 515 | } |
| 516 | currentWrite.Add(w) |
| 517 | } |
| 518 | out.Read = currentRead.Values() |
| 519 | out.Write = currentWrite.Values() |
| 520 | sort.Strings(out.Read) |
| 521 | sort.Strings(out.Write) |
| 522 | return out, nil |
| 523 | } |
| 524 | |
| 525 | // Revoke removes a set of permissions to the permission object on which it is called, |
| 526 | // returning a new permission object. |
| 527 | func (rw RWPermission) Revoke(n RWPermission) (RWPermission, error) { |
| 528 | var out RWPermission |
| 529 | currentRead := types.NewUnsafeSet(rw.Read...) |
| 530 | for _, r := range n.Read { |
| 531 | if !currentRead.Contains(r) { |
| 532 | plog.Noticef("revoking ungranted read permission %s", r) |
| 533 | continue |
| 534 | } |
| 535 | currentRead.Remove(r) |
| 536 | } |
| 537 | currentWrite := types.NewUnsafeSet(rw.Write...) |
| 538 | for _, w := range n.Write { |
| 539 | if !currentWrite.Contains(w) { |
| 540 | plog.Noticef("revoking ungranted write permission %s", w) |
| 541 | continue |
| 542 | } |
| 543 | currentWrite.Remove(w) |
| 544 | } |
| 545 | out.Read = currentRead.Values() |
| 546 | out.Write = currentWrite.Values() |
| 547 | sort.Strings(out.Read) |
| 548 | sort.Strings(out.Write) |
| 549 | return out, nil |
| 550 | } |
| 551 | |
| 552 | func (rw RWPermission) HasAccess(key string, write bool) bool { |
| 553 | var list []string |
| 554 | if write { |
| 555 | list = rw.Write |
| 556 | } else { |
| 557 | list = rw.Read |
| 558 | } |
| 559 | for _, pat := range list { |
| 560 | match, err := simpleMatch(pat, key) |
| 561 | if err == nil && match { |
| 562 | return true |
| 563 | } |
| 564 | } |
| 565 | return false |
| 566 | } |
| 567 | |
| 568 | func (rw RWPermission) HasRecursiveAccess(key string, write bool) bool { |
| 569 | list := rw.Read |
| 570 | if write { |
| 571 | list = rw.Write |
| 572 | } |
| 573 | for _, pat := range list { |
| 574 | match, err := prefixMatch(pat, key) |
| 575 | if err == nil && match { |
| 576 | return true |
| 577 | } |
| 578 | } |
| 579 | return false |
| 580 | } |
| 581 | |
| 582 | func simpleMatch(pattern string, key string) (match bool, err error) { |
| 583 | if pattern[len(pattern)-1] == '*' { |
| 584 | return strings.HasPrefix(key, pattern[:len(pattern)-1]), nil |
| 585 | } |
| 586 | return key == pattern, nil |
| 587 | } |
| 588 | |
| 589 | func prefixMatch(pattern string, key string) (match bool, err error) { |
| 590 | if pattern[len(pattern)-1] != '*' { |
| 591 | return false, nil |
| 592 | } |
| 593 | return strings.HasPrefix(key, pattern[:len(pattern)-1]), nil |
| 594 | } |
| 595 | |
| 596 | func attachRootRole(u User) User { |
| 597 | inRoles := false |
| 598 | for _, r := range u.Roles { |
| 599 | if r == RootRoleName { |
| 600 | inRoles = true |
| 601 | break |
| 602 | } |
| 603 | } |
| 604 | if !inRoles { |
| 605 | u.Roles = append(u.Roles, RootRoleName) |
| 606 | } |
| 607 | return u |
| 608 | } |
| 609 | |
| 610 | func (s *store) getUser(name string, quorum bool) (User, error) { |
| 611 | resp, err := s.requestResource("/users/"+name, false, quorum) |
| 612 | if err != nil { |
| 613 | if e, ok := err.(*etcderr.Error); ok { |
| 614 | if e.ErrorCode == etcderr.EcodeKeyNotFound { |
| 615 | return User{}, authErr(http.StatusNotFound, "User %s does not exist.", name) |
| 616 | } |
| 617 | } |
| 618 | return User{}, err |
| 619 | } |
| 620 | var u User |
| 621 | err = json.Unmarshal([]byte(*resp.Event.Node.Value), &u) |
| 622 | if err != nil { |
| 623 | return u, err |
| 624 | } |
| 625 | // Attach root role to root user. |
| 626 | if u.User == "root" { |
| 627 | u = attachRootRole(u) |
| 628 | } |
| 629 | return u, nil |
| 630 | } |
| 631 | |
| 632 | func (s *store) getRole(name string, quorum bool) (Role, error) { |
| 633 | if name == RootRoleName { |
| 634 | return rootRole, nil |
| 635 | } |
| 636 | resp, err := s.requestResource("/roles/"+name, false, quorum) |
| 637 | if err != nil { |
| 638 | if e, ok := err.(*etcderr.Error); ok { |
| 639 | if e.ErrorCode == etcderr.EcodeKeyNotFound { |
| 640 | return Role{}, authErr(http.StatusNotFound, "Role %s does not exist.", name) |
| 641 | } |
| 642 | } |
| 643 | return Role{}, err |
| 644 | } |
| 645 | var r Role |
| 646 | err = json.Unmarshal([]byte(*resp.Event.Node.Value), &r) |
| 647 | return r, err |
| 648 | } |