// merge applies the properties of the passed-in User to the User on which it
// is called and returns a new User with these modifications applied. Think of
// all Users as immutable sets of data. Merge allows you to perform the set
// operations (desired grants and revokes) atomically
func (u User) merge(n User) (User, error) {
var out User
if u.User != n.User {
return out, authErr(http.StatusConflict, "Merging user data with conflicting usernames: %s %s", u.User, n.User)
}
out.User = u.User
if n.Password != "" {
hash, err := bcrypt.GenerateFromPassword([]byte(n.Password), bcrypt.DefaultCost)
if err != nil {
return User{}, err
}
out.Password = string(hash)
} else {
out.Password = u.Password
}
currentRoles := types.NewUnsafeSet(u.Roles...)
for _, g := range n.Grant {
if currentRoles.Contains(g) {
plog.Noticef("granting duplicate role %s for user %s", g, n.User)
return User{}, authErr(http.StatusConflict, fmt.Sprintf("Granting duplicate role %s for user %s", g, n.User))
}
currentRoles.Add(g)
}
for _, r := range n.Revoke {
if !currentRoles.Contains(r) {
plog.Noticef("revoking ungranted role %s for user %s", r, n.User)
return User{}, authErr(http.StatusConflict, fmt.Sprintf("Revoking ungranted role %s for user %s", r, n.User))
}
currentRoles.Remove(r)
}
out.Roles = currentRoles.Values()
sort.Strings(out.Roles)
return out, nil
}
func DetectDataDir(dirpath string) (DataDirVersion, error) {
names, err := fileutil.ReadDir(dirpath)
if err != nil {
if os.IsNotExist(err) {
err = nil
}
// Error reading the directory
return DataDirUnknown, err
}
nameSet := types.NewUnsafeSet(names...)
if nameSet.Contains("member") {
ver, err := DetectDataDir(path.Join(dirpath, "member"))
if ver == DataDir2_0 {
return DataDir2_0_1, nil
}
return ver, err
}
if nameSet.ContainsAll([]string{"snap", "wal"}) {
// .../wal cannot be empty to exist.
walnames, err := fileutil.ReadDir(path.Join(dirpath, "wal"))
if err == nil && len(walnames) > 0 {
return DataDir2_0, nil
}
}
if nameSet.ContainsAll([]string{"proxy"}) {
return DataDir2_0Proxy, nil
}
return DataDirUnknown, nil
}
// Grant adds a set of permissions to the permission object on which it is called,
// returning a new permission object.
func (rw RWPermission) Grant(n RWPermission) (RWPermission, error) {
var out RWPermission
currentRead := types.NewUnsafeSet(rw.Read...)
for _, r := range n.Read {
if currentRead.Contains(r) {
return out, authErr(http.StatusConflict, "Granting duplicate read permission %s", r)
}
currentRead.Add(r)
}
currentWrite := types.NewUnsafeSet(rw.Write...)
for _, w := range n.Write {
if currentWrite.Contains(w) {
return out, authErr(http.StatusConflict, "Granting duplicate write permission %s", w)
}
currentWrite.Add(w)
}
out.Read = currentRead.Values()
out.Write = currentWrite.Values()
sort.Strings(out.Read)
sort.Strings(out.Write)
return out, nil
}
func newStore(namespaces ...string) *store {
s := new(store)
s.CurrentVersion = defaultVersion
s.Root = newDir(s, "/", s.CurrentIndex, nil, Permanent)
for _, namespace := range namespaces {
s.Root.Add(newDir(s, namespace, s.CurrentIndex, s.Root, Permanent))
}
s.Stats = newStats()
s.WatcherHub = newWatchHub(1000)
s.ttlKeyHeap = newTtlKeyHeap()
s.readonlySet = types.NewUnsafeSet(append(namespaces, "/")...)
return s
}
// Revoke removes a set of permissions to the permission object on which it is called,
// returning a new permission object.
func (rw RWPermission) Revoke(n RWPermission) (RWPermission, error) {
var out RWPermission
currentRead := types.NewUnsafeSet(rw.Read...)
for _, r := range n.Read {
if !currentRead.Contains(r) {
plog.Noticef("revoking ungranted read permission %s", r)
continue
}
currentRead.Remove(r)
}
currentWrite := types.NewUnsafeSet(rw.Write...)
for _, w := range n.Write {
if !currentWrite.Contains(w) {
plog.Noticef("revoking ungranted write permission %s", w)
continue
}
currentWrite.Remove(w)
}
out.Read = currentRead.Values()
out.Write = currentWrite.Values()
sort.Strings(out.Read)
sort.Strings(out.Write)
return out, nil
}