func runListKeys(ctx *context.T, env *cmdline.Env, args []string) error {
peerBlessings := v23.GetPrincipal(ctx).BlessingStore().PeerBlessings()
const format = "%-30s %s (Expires: %s)\n"
fmt.Printf(format, "Lock", "Key", "<expiry time>")
for lock, key := range peerBlessings {
if !isValidLockName(string(lock)) {
continue
}
if !isKeyValidForLock(ctx, key, string(lock)) {
continue
}
var (
expiresIn string
now = time.Now()
)
if exp := key.Expiry(); !exp.IsZero() && exp.Before(now) {
// TODO(ataly): Remove the key from the blessing
// store.
continue
} else if exp.IsZero() {
expiresIn = "NEVER"
} else {
expiresIn = fmt.Sprintf("in %v", exp.Sub(now))
}
fmt.Printf(format, lock, key, expiresIn)
}
return nil
}
func startLockServer(ctx *context.T, configDir string) (func(), error) {
blessings, _ := v23.GetPrincipal(ctx).BlessingStore().Default()
lockNhSuffix := fmt.Sprint(blessings)
// Start a local mounttable where the lock server would be
// mounted, and make this mounttable visible in the local
// neighborhood.
mtName, stopMT, err := locklib.StartMounttable(ctx, configDir, locklib.LockNhPrefix+lockNhSuffix)
if err != nil {
return nil, err
}
ctx, _, err = v23.WithNewNamespace(ctx, mtName)
if err != nil {
stopMT()
return nil, err
}
ctx, cancel := context.WithCancel(ctx)
_, server, err := v23.WithNewServer(ctx, lockObjectName(ctx), newLock(), security.DefaultAuthorizer())
if err != nil {
stopMT()
return nil, err
}
stopLock := func() {
cancel()
vlog.Infof("Stopping lock server...")
<-server.Closed()
vlog.Infof("Stopped lock server...")
stopMT()
}
vlog.Infof("Started lock server\n")
vlog.Infof("ENDPOINT: %v\n", server.Status().Endpoints[0].Name())
return stopLock, nil
}
func runClaim(ctx *context.T, env *cmdline.Env, args []string) error {
if numargs := len(args); numargs != 2 {
return fmt.Errorf("requires exactly two arguments <lock>, <name>, provided %d", numargs)
}
lockName, name := args[0], args[1]
ctx, stop, err := withLocalNamespace(ctx, "", lockUserNhName(ctx))
if err != nil {
return err
}
defer stop()
ctx, cancel := context.WithTimeout(ctx, time.Minute)
defer cancel()
// TODO(ataly): We should not skip server endpoint authorization while
// claiming locks but instead fetch the blessing root of the lock manufacturer
// from an authoritative source and then appropriately authenticate the server.
b, err := lock.UnclaimedLockClient(lockObjName(lockName)).Claim(
ctx,
name,
options.ServerAuthorizer{security.AllowEveryone()})
if err != nil {
return err
}
p := v23.GetPrincipal(ctx)
if err := security.AddToRoots(p, b); err != nil {
return fmt.Errorf("failed to add (key) blessing (%v) to roots: %v", b, err)
}
if _, err := p.BlessingStore().Set(b, security.BlessingPattern(name)); err != nil {
return fmt.Errorf("failed to set (key) blessing (%v) for peer %v: %v", b, name, err)
}
fmt.Printf("Claimed lock: %v as %v and received key: %v\n", lockName, name, b)
return nil
}
func lockUserNhName(ctx *context.T) string {
var (
principal = v23.GetPrincipal(ctx)
blessings, _ = principal.BlessingStore().Default()
bNames = security.BlessingNames(principal, blessings)
)
return lockUserNhPrefix + vUser(bNames...)
}
func isKeyValidForLock(ctx *context.T, key security.Blessings, lockName string) bool {
bp := security.BlessingPattern(lockName + security.ChainSeparator + "key")
for _, b := range security.BlessingNames(v23.GetPrincipal(ctx), key) {
if bp.MatchedBy(b) {
return true
}
}
return false
}
//export swift_io_v_v23_security_simple_nativePublicKey
func swift_io_v_v23_security_simple_nativePublicKey(ctxHandle C.GoContextHandle, errOut *C.SwiftVError) *C.char {
ctx := context.GoContext(uint64(ctxHandle))
der, err := v23.GetPrincipal(ctx).PublicKey().MarshalBinary()
if err != nil {
util.ThrowSwiftError(nil, err, unsafe.Pointer(errOut))
return nil
}
// Swift will have to free the allocation
return C.CString(base64.URLEncoding.EncodeToString(der))
}
func saveKeyForLock(ctx *context.T, key security.Blessings, lockName string) error {
if isKeyValidForLock(ctx, key, lockName) {
return fmt.Errorf("key %v is not valid for lock %v", key, lockName)
}
p := v23.GetPrincipal(ctx)
if _, err := p.BlessingStore().Set(key, security.BlessingPattern(lockName)); err != nil {
return fmt.Errorf("failed to save key %v for lock %v", key, lockName)
}
if err := security.AddToRoots(p, key); err != nil {
return fmt.Errorf("failed to save key %v for lock %v", key, lockName)
}
return nil
}
func (ul *unclaimedLock) Claim(ctx *context.T, call rpc.ServerCall, name string) (security.Blessings, error) {
vlog.Infof("Claim called by %q", call.Security().RemoteBlessings())
if strings.ContainsAny(name, security.ChainSeparator) {
// TODO(ataly, ashankar): We have to error out in this case because of the current
// neighborhood setup wherein the neighborhood-name of a claimed lock's mounttable is
// the same as the locks's name. Since neighborhood-names aren't allowed to contain
// slashes, we have to disallow slashes in the lock name as well.
return security.Blessings{}, NewErrInvalidLockName(ctx, name, security.ChainSeparator)
}
var (
principal = v23.GetPrincipal(ctx)
origDefault, _ = principal.BlessingStore().Default()
restore = func() error {
// TODO(ataly): Remove roots of current default blessing if needed
// (i.e., if current default != origDefault).
if err := principal.BlessingStore().SetDefault(origDefault); err != nil {
return verror.Convert(verror.ErrInternal, ctx, err)
}
return nil
}
)
defer ul.mu.Unlock()
ul.mu.Lock()
if ul.claimed == nil {
return security.Blessings{}, NewErrLockAlreadyClaimed(ctx)
}
keyBlessing, err := ul.makeKey(principal, name, call.Security().RemoteBlessings().PublicKey())
if err != nil {
restore()
return security.Blessings{}, verror.Convert(verror.ErrInternal, ctx, err)
}
// Create a file in the config directory to indicate that lock has been claimed.
f, err := os.Create(filepath.Join(ul.configDir, claimFileName))
if err != nil {
restore()
return security.Blessings{}, verror.Convert(verror.ErrInternal, ctx, err)
}
f.Close()
close(ul.claimed)
ul.claimed = nil
vlog.Infof("Lock successfullly claimed with name %q", name)
return keyBlessing, nil
}
//export swift_io_v_v23_security_simple_nativeSetBlessings
func swift_io_v_v23_security_simple_nativeSetBlessings(ctxHandle C.GoContextHandle, encodedSwiftBlessings C.SwiftByteArray, errOut *C.SwiftVError) {
ctx := context.GoContext(uint64(ctxHandle))
encodedBlessings := util.GoBytesNoCopy(unsafe.Pointer(&encodedSwiftBlessings))
var blessings security.Blessings
if err := vom.Decode(encodedBlessings, &blessings); err != nil {
ctx.Error("Unable to decode:", err)
util.ThrowSwiftError(nil, err, unsafe.Pointer(errOut))
return
}
principal := v23.GetPrincipal(ctx)
if err := principal.BlessingStore().SetDefault(blessings); err != nil {
util.ThrowSwiftError(nil, err, unsafe.Pointer(errOut))
return
}
}
func keyForLock(ctx *context.T, lockName string) (security.Blessings, error) {
// We could simply return v23.GetPrincipal(ctx).BlessingStore().ForPeer(lock)
// however this would also include any blessings tagged for a peer pattern
// is matched by 'lock'. Therefore we iterate over all the blessings
// and pick the specific ones that are meant for 'lock'.
var ret security.Blessings
for _, b := range v23.GetPrincipal(ctx).BlessingStore().PeerBlessings() {
if isKeyValidForLock(ctx, b, lockName) {
if union, err := security.UnionOfBlessings(ret, b); err != nil {
vlog.Errorf("UnionOfBlessings(%v, %v) failed: %v, dropping latter blessing", ret, b, err)
} else {
ret = union
}
}
}
if ret.IsZero() {
return security.Blessings{}, fmt.Errorf("no available key for lock %v", lockName)
}
return ret, nil
}
func (nm *networkManager) run(ready chan<- interface{}, newLeftScreen, newRightScreen chan<- chan<- *spec.Triangle, newInvite chan<- Invitation) {
defer close(nm.myScreen)
defer close(newLeftScreen)
defer close(newRightScreen)
notifyReady := func(result interface{}) {
ready <- result
close(ready)
ready = nil
}
ctx, shutdown := v23.Init()
defer shutdown()
ctx, server, err := v23.WithNewServer(ctx, "", spec.ScreenServer(nm), security.AllowEveryone())
if err != nil {
notifyReady(err)
return
}
disc, err := v23.NewDiscovery(ctx)
if err != nil {
notifyReady(err)
return
}
// Select a color based on some unique identifier of the process, the PublicKey serves as one.
notifyReady(selectColor(v23.GetPrincipal(ctx).PublicKey()))
var (
left = remoteScreen{myScreen: nm.myScreen, notify: newLeftScreen}
right = remoteScreen{myScreen: nm.myScreen, notify: newRightScreen}
accepted = make(chan string) // Names of remote screens that accepted an invitation
seek = make(chan bool) // Send false to stop seeking invitations from others, true otherwise
pendingInviterName string
pendingInviteUserResponse <-chan error
pendingInviteRPCResponse chan<- error
)
seekInvites(ctx, disc, server, seek)
go sendInvites(ctx, disc, accepted)
for {
select {
case invitation := <-nm.inviteRPCs:
if left.Active() {
invitation.Response <- fmt.Errorf("thanks for the invite but I'm already engaged with a previous invitation")
break
}
// Defer the response to the user interface.
ch := make(chan error)
pendingInviterName = invitation.Name
pendingInviteRPCResponse = invitation.Response
pendingInviteUserResponse = ch
invitation.Response = ch
newInvite <- invitation
case err := <-pendingInviteUserResponse:
pendingInviteRPCResponse <- err
if err == nil {
ctx.Infof("Activating left screen %q", pendingInviterName)
left.Activate(ctx, pendingInviterName)
seek <- false
}
pendingInviterName = ""
pendingInviteUserResponse = nil
pendingInviteRPCResponse = nil
case <-left.Lost():
ctx.Infof("Deactivating left screen")
left.Deactivate()
seek <- true
case invitee := <-accepted:
ctx.Infof("Activating right screen %q", invitee)
right.Activate(ctx, invitee)
case <-right.Lost():
ctx.Infof("Deactivating right screen")
right.Deactivate()
go sendInvites(ctx, disc, accepted)
case <-ctx.Done():
return
}
}
}
//export swift_io_v_v23_security_simple_nativeBlessingsDebugString
func swift_io_v_v23_security_simple_nativeBlessingsDebugString(ctxHandle C.GoContextHandle) *C.char {
ctx := context.GoContext(uint64(ctxHandle))
blessings, _ := v23.GetPrincipal(ctx).BlessingStore().Default()
return C.CString(fmt.Sprintf("%v", blessings))
}
