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keybase_service_base.go
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keybase_service_base.go
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// Copyright 2016 Keybase Inc. All rights reserved.
// Use of this source code is governed by a BSD
// license that can be found in the LICENSE file.
package libkbfs
import (
"fmt"
"strings"
"sync"
"time"
"github.com/keybase/client/go/kbfs/data"
"github.com/keybase/client/go/kbfs/favorites"
"github.com/keybase/client/go/kbfs/idutil"
"github.com/keybase/client/go/kbfs/kbfscrypto"
"github.com/keybase/client/go/kbfs/kbfsmd"
"github.com/keybase/client/go/kbfs/tlf"
"github.com/keybase/client/go/kbfs/tlfhandle"
kbname "github.com/keybase/client/go/kbun"
"github.com/keybase/client/go/libkb"
"github.com/keybase/client/go/logger"
"github.com/keybase/client/go/protocol/keybase1"
"github.com/pkg/errors"
"golang.org/x/net/context"
)
// KeybaseServiceBase implements most of KeybaseService from protocol
// defined clients.
type KeybaseServiceBase struct {
context Context
identifyClient keybase1.IdentifyInterface
userClient keybase1.UserInterface
teamsClient keybase1.TeamsInterface
merkleClient keybase1.MerkleInterface
sessionClient keybase1.SessionInterface
favoriteClient keybase1.FavoriteInterface
kbfsClient keybase1.KbfsInterface
kbfsMountClient keybase1.KbfsMountInterface
gitClient keybase1.GitInterface
log logger.Logger
config Config
merkleRoot *EventuallyConsistentMerkleRoot
sessionCacheLock sync.RWMutex
// Set to the zero value when invalidated.
cachedCurrentSession idutil.SessionInfo
sessionInProgressCh chan struct{}
userCacheLock sync.RWMutex
// Map entries are removed when invalidated.
userCache map[keybase1.UID]idutil.UserInfo
teamCacheLock sync.RWMutex
// Map entries are removed when invalidated.
teamCache map[keybase1.TeamID]idutil.TeamInfo
}
// Wrapper over `KeybaseServiceBase` implementing a `merkleRootGetter`
// that gets the merkle root directly from the service, without using
// the cache.
type keybaseServiceMerkleGetter struct {
k *KeybaseServiceBase
}
var _ idutil.MerkleRootGetter = (*keybaseServiceMerkleGetter)(nil)
func (k *keybaseServiceMerkleGetter) GetCurrentMerkleRoot(
ctx context.Context) (keybase1.MerkleRootV2, time.Time, error) {
return k.k.getCurrentMerkleRoot(ctx)
}
func (k *keybaseServiceMerkleGetter) VerifyMerkleRoot(
_ context.Context, _ keybase1.MerkleRootV2, _ keybase1.KBFSRoot) error {
panic("constMerkleRootGetter doesn't verify merkle roots")
}
// NewKeybaseServiceBase makes a new KeybaseService.
func NewKeybaseServiceBase(config Config, kbCtx Context, log logger.Logger) *KeybaseServiceBase {
k := KeybaseServiceBase{
config: config,
context: kbCtx,
log: log,
userCache: make(map[keybase1.UID]idutil.UserInfo),
teamCache: make(map[keybase1.TeamID]idutil.TeamInfo),
}
if config != nil {
k.merkleRoot = NewEventuallyConsistentMerkleRoot(
config, &keybaseServiceMerkleGetter{&k})
}
return &k
}
// FillClients sets the client protocol implementations needed for a KeybaseService.
func (k *KeybaseServiceBase) FillClients(
identifyClient keybase1.IdentifyInterface,
userClient keybase1.UserInterface, teamsClient keybase1.TeamsInterface,
merkleClient keybase1.MerkleInterface,
sessionClient keybase1.SessionInterface,
favoriteClient keybase1.FavoriteInterface,
kbfsClient keybase1.KbfsInterface,
kbfsMountClient keybase1.KbfsMountInterface,
gitClient keybase1.GitInterface) {
k.identifyClient = identifyClient
k.userClient = userClient
k.teamsClient = teamsClient
k.merkleClient = merkleClient
k.sessionClient = sessionClient
k.favoriteClient = favoriteClient
k.kbfsClient = kbfsClient
k.kbfsMountClient = kbfsMountClient
k.gitClient = gitClient
}
type addVerifyingKeyFunc func(kbfscrypto.VerifyingKey)
type addCryptPublicKeyFunc func(kbfscrypto.CryptPublicKey)
// processKey adds the given public key to the appropriate verifying
// or crypt list (as return values), and also updates the given name
// map and parent map in place.
func processKey(publicKey keybase1.PublicKeyV2NaCl,
addVerifyingKey addVerifyingKeyFunc,
addCryptPublicKey addCryptPublicKeyFunc,
kidNames map[keybase1.KID]string,
parents map[keybase1.KID]keybase1.KID) error {
// Import the KID to validate it.
key, err := libkb.ImportKeypairFromKID(publicKey.Base.Kid)
if err != nil {
return err
}
if publicKey.Base.IsSibkey {
addVerifyingKey(kbfscrypto.MakeVerifyingKey(key.GetKID()))
} else {
addCryptPublicKey(kbfscrypto.MakeCryptPublicKey(key.GetKID()))
}
if publicKey.DeviceDescription != "" {
kidNames[publicKey.Base.Kid] = publicKey.DeviceDescription
}
if publicKey.Parent != nil {
parents[publicKey.Base.Kid] = *publicKey.Parent
}
return nil
}
// updateKIDNamesFromParents sets the name of each KID without a name
// that has a a parent with a name, to that parent's name.
func updateKIDNamesFromParents(kidNames map[keybase1.KID]string,
parents map[keybase1.KID]keybase1.KID) {
for kid, parent := range parents {
if _, ok := kidNames[kid]; ok {
continue
}
if parentName, ok := kidNames[parent]; ok {
kidNames[kid] = parentName
}
}
}
func filterKeys(keys map[keybase1.KID]keybase1.PublicKeyV2NaCl) (
verifyingKeys []kbfscrypto.VerifyingKey,
cryptPublicKeys []kbfscrypto.CryptPublicKey,
kidNames map[keybase1.KID]string, err error) {
kidNames = make(map[keybase1.KID]string, len(keys))
parents := make(map[keybase1.KID]keybase1.KID, len(keys))
addVerifyingKey := func(key kbfscrypto.VerifyingKey) {
verifyingKeys = append(verifyingKeys, key)
}
addCryptPublicKey := func(key kbfscrypto.CryptPublicKey) {
cryptPublicKeys = append(cryptPublicKeys, key)
}
for _, publicKey := range keys {
if publicKey.Base.Revocation != nil {
continue
}
err := processKey(publicKey, addVerifyingKey, addCryptPublicKey,
kidNames, parents)
if err != nil {
return nil, nil, nil, err
}
}
updateKIDNamesFromParents(kidNames, parents)
return verifyingKeys, cryptPublicKeys, kidNames, nil
}
func (k *KeybaseServiceBase) filterRevokedKeys(
ctx context.Context,
uid keybase1.UID,
keys map[keybase1.KID]keybase1.PublicKeyV2NaCl,
reset *keybase1.ResetSummary) (
map[kbfscrypto.VerifyingKey]idutil.RevokedKeyInfo,
map[kbfscrypto.CryptPublicKey]idutil.RevokedKeyInfo,
map[keybase1.KID]string, error) {
verifyingKeys := make(map[kbfscrypto.VerifyingKey]idutil.RevokedKeyInfo)
cryptPublicKeys := make(
map[kbfscrypto.CryptPublicKey]idutil.RevokedKeyInfo)
var kidNames = map[keybase1.KID]string{}
var parents = map[keybase1.KID]keybase1.KID{}
for _, key := range keys {
var info idutil.RevokedKeyInfo
switch {
case key.Base.Revocation != nil:
info.Time = key.Base.Revocation.Time
info.MerkleRoot = key.Base.Revocation.PrevMerkleRootSigned
// If we don't have a prev seqno, then we already have the
// best merkle data we're going to get.
info.SetFilledInMerkle(info.MerkleRoot.Seqno <= 0)
info.SetSigChainLocation(key.Base.Revocation.SigChainLocation)
case reset != nil:
info.Time = keybase1.ToTime(keybase1.FromUnixTime(reset.Ctime))
info.MerkleRoot.Seqno = reset.MerkleRoot.Seqno
info.MerkleRoot.HashMeta = reset.MerkleRoot.HashMeta
// If we don't have a prev seqno, then we already have the
// best merkle data we're going to get.
info.SetFilledInMerkle(info.MerkleRoot.Seqno <= 0)
info.SetResetInfo(reset.ResetSeqno, true)
default:
// Not revoked.
continue
}
addVerifyingKey := func(key kbfscrypto.VerifyingKey) {
verifyingKeys[key] = info
}
addCryptPublicKey := func(key kbfscrypto.CryptPublicKey) {
cryptPublicKeys[key] = info
}
err := processKey(key, addVerifyingKey, addCryptPublicKey,
kidNames, parents)
if err != nil {
return nil, nil, nil, err
}
}
updateKIDNamesFromParents(kidNames, parents)
return verifyingKeys, cryptPublicKeys, kidNames, nil
}
func (k *KeybaseServiceBase) getCachedCurrentSession() idutil.SessionInfo {
k.sessionCacheLock.RLock()
defer k.sessionCacheLock.RUnlock()
return k.cachedCurrentSession
}
func (k *KeybaseServiceBase) setCachedCurrentSession(s idutil.SessionInfo) {
k.sessionCacheLock.Lock()
defer k.sessionCacheLock.Unlock()
k.cachedCurrentSession = s
}
func (k *KeybaseServiceBase) getCachedUserInfo(
uid keybase1.UID) idutil.UserInfo {
k.userCacheLock.RLock()
defer k.userCacheLock.RUnlock()
return k.userCache[uid]
}
func (k *KeybaseServiceBase) setCachedUserInfo(
uid keybase1.UID, info idutil.UserInfo) {
k.userCacheLock.Lock()
defer k.userCacheLock.Unlock()
if info.Name == kbname.NormalizedUsername("") {
delete(k.userCache, uid)
} else {
k.userCache[uid] = info
}
}
func (k *KeybaseServiceBase) getCachedTeamInfo(
tid keybase1.TeamID) idutil.TeamInfo {
k.teamCacheLock.RLock()
defer k.teamCacheLock.RUnlock()
return k.teamCache[tid]
}
func (k *KeybaseServiceBase) setCachedTeamInfo(
tid keybase1.TeamID, info idutil.TeamInfo) {
k.teamCacheLock.Lock()
defer k.teamCacheLock.Unlock()
if info.Name == kbname.NormalizedUsername("") {
delete(k.teamCache, tid)
} else {
k.teamCache[tid] = info
}
}
// ClearCaches implements the KeybaseService interface for
// KeybaseServiceBase.
func (k *KeybaseServiceBase) ClearCaches(ctx context.Context) {
k.log.CDebugf(ctx, "Clearing KBFS-side user and team caches")
k.setCachedCurrentSession(idutil.SessionInfo{})
func() {
k.userCacheLock.Lock()
defer k.userCacheLock.Unlock()
k.userCache = make(map[keybase1.UID]idutil.UserInfo)
}()
k.teamCacheLock.Lock()
defer k.teamCacheLock.Unlock()
k.teamCache = make(map[keybase1.TeamID]idutil.TeamInfo)
}
// LoggedIn implements keybase1.NotifySessionInterface.
func (k *KeybaseServiceBase) LoggedIn(ctx context.Context, arg keybase1.LoggedInArg) error {
k.log.CDebugf(ctx, "Current session logged in: %s, signedUp: %t", arg.Username, arg.SignedUp)
// Since we don't have the whole session, just clear the cache and
// repopulate it. The `CurrentSession` call executes the "logged
// in" flow.
k.setCachedCurrentSession(idutil.SessionInfo{})
const sessionID = 0
_, err := k.CurrentSession(ctx, sessionID)
if err != nil {
k.log.CDebugf(ctx, "Getting current session failed when %s is logged "+
"in, so pretending user has logged out: %v",
arg.Username, err)
if k.config != nil {
serviceLoggedOut(ctx, k.config)
}
return nil
}
return nil
}
// LoggedOut implements keybase1.NotifySessionInterface.
func (k *KeybaseServiceBase) LoggedOut(ctx context.Context) error {
k.log.CDebugf(ctx, "Current session logged out")
k.setCachedCurrentSession(idutil.SessionInfo{})
if k.config != nil {
serviceLoggedOut(ctx, k.config)
}
return nil
}
// KeyfamilyChanged implements keybase1.NotifyKeyfamilyInterface.
func (k *KeybaseServiceBase) KeyfamilyChanged(ctx context.Context,
uid keybase1.UID) error {
k.log.CDebugf(ctx, "Key family for user %s changed", uid)
k.setCachedUserInfo(uid, idutil.UserInfo{})
if k.getCachedCurrentSession().UID == uid {
mdServer := k.config.MDServer()
if mdServer != nil {
// Ignore any errors for now, we don't want to block this
// notification and it's not worth spawning a goroutine for.
mdServer.CheckForRekeys(context.Background())
}
}
return nil
}
// ReachabilityChanged implements keybase1.ReachabiltyInterface.
func (k *KeybaseServiceBase) ReachabilityChanged(ctx context.Context,
reachability keybase1.Reachability) error {
k.log.CDebugf(ctx, "CheckReachability invoked: %v", reachability)
if reachability.Reachable == keybase1.Reachable_YES {
k.config.KBFSOps().PushConnectionStatusChange(GregorServiceName, nil)
} else {
k.config.KBFSOps().PushConnectionStatusChange(
GregorServiceName, errDisconnected{})
}
mdServer := k.config.MDServer()
if mdServer != nil {
mdServer.CheckReachability(ctx)
}
return nil
}
// StartReachability implements keybase1.ReachabilityInterface.
func (k *KeybaseServiceBase) StartReachability(ctx context.Context) (res keybase1.Reachability, err error) {
return k.CheckReachability(ctx)
}
// CheckReachability implements keybase1.ReachabilityInterface.
func (k *KeybaseServiceBase) CheckReachability(ctx context.Context) (res keybase1.Reachability, err error) {
res.Reachable = keybase1.Reachable_NO
mdServer := k.config.MDServer()
if mdServer != nil && mdServer.IsConnected() {
res.Reachable = keybase1.Reachable_YES
}
return res, nil
}
// PaperKeyCached implements keybase1.NotifyPaperKeyInterface.
func (k *KeybaseServiceBase) PaperKeyCached(ctx context.Context,
arg keybase1.PaperKeyCachedArg) error {
k.log.CDebugf(ctx, "Paper key for %s cached", arg.Uid)
if k.getCachedCurrentSession().UID == arg.Uid {
err := k.config.KBFSOps().KickoffAllOutstandingRekeys()
if err != nil {
// Ignore and log errors here. For now the only way it could error
// is when the method is called on a folderBranchOps which is a
// developer mistake and not recoverable from code.
k.log.CDebugf(ctx,
"Calling KickoffAllOutstandingRekeys error: %s", err)
}
// Ignore any errors for now, we don't want to block this
// notification and it's not worth spawning a goroutine for.
mdServer := k.config.MDServer()
if mdServer != nil {
mdServer.CheckForRekeys(context.Background())
}
}
return nil
}
// ClientOutOfDate implements keybase1.NotifySessionInterface.
func (k *KeybaseServiceBase) ClientOutOfDate(ctx context.Context,
arg keybase1.ClientOutOfDateArg) error {
k.log.CDebugf(ctx, "Client out of date: %v", arg)
return nil
}
// RootAuditError implements keybase1.NotifyAuditInterface.
func (k *KeybaseServiceBase) RootAuditError(ctx context.Context,
arg keybase1.RootAuditErrorArg) error {
k.log.CDebugf(ctx, "Merkle tree audit error: %v", arg.Message)
return nil
}
// ConvertIdentifyError converts a errors during identify into KBFS errors
func ConvertIdentifyError(assertion string, err error) error {
switch err.(type) {
case libkb.NotFoundError:
return idutil.NoSuchUserError{Input: assertion}
case libkb.ResolutionError:
return idutil.NoSuchUserError{Input: assertion}
}
return err
}
// Resolve implements the KeybaseService interface for KeybaseServiceBase.
func (k *KeybaseServiceBase) Resolve(
ctx context.Context, assertion string,
offline keybase1.OfflineAvailability) (
kbname.NormalizedUsername, keybase1.UserOrTeamID, error) {
res, err := k.identifyClient.Resolve3(
ctx, keybase1.Resolve3Arg{
Assertion: assertion,
Oa: offline,
})
if err != nil {
return kbname.NormalizedUsername(""), keybase1.UserOrTeamID(""),
ConvertIdentifyError(assertion, err)
}
return kbname.NewNormalizedUsername(res.Name), res.Id, nil
}
// Identify implements the KeybaseService interface for KeybaseServiceBase.
func (k *KeybaseServiceBase) Identify(
ctx context.Context, assertion, reason string,
offline keybase1.OfflineAvailability) (
kbname.NormalizedUsername, keybase1.UserOrTeamID, error) {
// setting UseDelegateUI to true here will cause daemon to use
// registered identify ui providers instead of terminal if any
// are available. If not, then it will use the terminal UI.
arg := keybase1.IdentifyLiteArg{
Assertion: assertion,
UseDelegateUI: true,
Reason: keybase1.IdentifyReason{Reason: reason},
// No need to go back and forth with the UI until the service
// knows for sure there's a need for a dialogue.
CanSuppressUI: true,
Oa: offline,
}
ei := tlfhandle.GetExtendedIdentify(ctx)
arg.IdentifyBehavior = ei.Behavior
res, err := k.identifyClient.IdentifyLite(ctx, arg)
// IdentifyLite still returns keybase1.UserPlusKeys data (sans
// keys), even if it gives a NoSigChainError or a UserDeletedError,
// and in KBFS it's fine if the user doesn't have a full sigchain
// (e.g., it's just like the sharing before signup case, except
// the user already has a UID). Both types of users are based
// entirely on server trust anyway.
switch err.(type) {
case nil:
case libkb.NoSigChainError, libkb.UserDeletedError:
k.log.CDebugf(ctx,
"Ignoring error (%s) for user %s with no sigchain; "+
"error type=%T", err, res.Ul.Name, err)
ei.OnError(ctx)
default:
// If the caller is waiting for breaks, let them know we got an error.
ei.OnError(ctx)
return kbname.NormalizedUsername(""), keybase1.UserOrTeamID(""),
ConvertIdentifyError(assertion, err)
}
// This is required for every identify call. The userBreak
// function will take care of checking if res.TrackBreaks is nil
// or not.
name := kbname.NormalizedUsername(res.Ul.Name)
if res.Ul.Id.IsUser() {
asUser, err := res.Ul.Id.AsUser()
if err != nil {
return kbname.NormalizedUsername(""), keybase1.UserOrTeamID(""), err
}
ei.UserBreak(ctx, name, asUser, res.TrackBreaks)
} else if !res.Ul.Id.IsNil() {
ei.TeamBreak(ctx, res.Ul.Id.AsTeamOrBust(), res.TrackBreaks)
}
return name, res.Ul.Id, nil
}
// NormalizeSocialAssertion implements the KeybaseService interface for
// KeybaseServiceBase.
func (k *KeybaseServiceBase) NormalizeSocialAssertion(
ctx context.Context, assertion string) (keybase1.SocialAssertion, error) {
return k.identifyClient.NormalizeSocialAssertion(ctx, assertion)
}
// ResolveIdentifyImplicitTeam implements the KeybaseService interface
// for KeybaseServiceBase.
func (k *KeybaseServiceBase) ResolveIdentifyImplicitTeam(
ctx context.Context, assertions, suffix string, tlfType tlf.Type,
doIdentifies bool, reason string,
offline keybase1.OfflineAvailability) (idutil.ImplicitTeamInfo, error) {
if tlfType != tlf.Private && tlfType != tlf.Public {
return idutil.ImplicitTeamInfo{}, fmt.Errorf(
"Invalid implicit team TLF type: %s", tlfType)
}
arg := keybase1.ResolveIdentifyImplicitTeamArg{
Assertions: assertions,
Suffix: suffix,
DoIdentifies: doIdentifies,
Reason: keybase1.IdentifyReason{Reason: reason},
Create: true,
IsPublic: tlfType == tlf.Public,
Oa: offline,
}
ei := tlfhandle.GetExtendedIdentify(ctx)
arg.IdentifyBehavior = ei.Behavior
res, err := k.identifyClient.ResolveIdentifyImplicitTeam(ctx, arg)
if err != nil {
return idutil.ImplicitTeamInfo{}, ConvertIdentifyError(assertions, err)
}
if strings.Contains(res.DisplayName, "_implicit_team_") {
k.log.CWarningf(
ctx, "Got display name %s for assertions %s",
res.DisplayName, assertions)
}
name := kbname.NormalizedUsername(res.DisplayName)
// Exactly one break callback is required for every identify call.
if doIdentifies {
if len(res.TrackBreaks) > 0 {
// Iterate the map to get one entry, then break.
for userVer, breaks := range res.TrackBreaks {
// TODO: resolve the UID into a username so we don't have to
// pass in the full display name here?
ei.UserBreak(ctx, name, userVer.Uid, &breaks)
break
}
} else {
ei.TeamBreak(ctx, keybase1.TeamID(""), nil)
}
}
iteamInfo := idutil.ImplicitTeamInfo{
Name: name,
TID: res.TeamID,
}
if res.FolderID != "" {
iteamInfo.TlfID, err = tlf.ParseID(res.FolderID.String())
if err != nil {
return idutil.ImplicitTeamInfo{}, err
}
}
return iteamInfo, nil
}
// ResolveImplicitTeamByID implements the KeybaseService interface for
// KeybaseServiceBase.
func (k *KeybaseServiceBase) ResolveImplicitTeamByID(
ctx context.Context, teamID keybase1.TeamID) (name string, err error) {
arg := keybase1.ResolveImplicitTeamArg{
Id: teamID,
}
res, err := k.identifyClient.ResolveImplicitTeam(ctx, arg)
if err != nil {
return "", err
}
return res.Name, nil
}
func (k *KeybaseServiceBase) checkForRevokedVerifyingKey(
ctx context.Context, currUserInfo idutil.UserInfo, kid keybase1.KID) (
newUserInfo idutil.UserInfo, exists bool, err error) {
newUserInfo = currUserInfo
for key, info := range currUserInfo.RevokedVerifyingKeys {
if !key.KID().Equal(kid) {
continue
}
exists = true
if info.FilledInMerkle() {
break
}
k.log.CDebugf(ctx, "Filling in merkle info for user %s, revoked key %s",
currUserInfo.UID, kid)
// If possible, ask the service to give us the first merkle
// root that covers this revoke. Some older device revokes
// didn't yet include a prev field, so we can't refine the
// merkle root in those cases, and will be relying only on
// server trust.
if info.MerkleRoot.Seqno > 0 {
var res keybase1.NextMerkleRootRes
resetSeqno, isReset := info.ResetInfo()
if isReset {
res, err = k.userClient.FindNextMerkleRootAfterReset(ctx,
keybase1.FindNextMerkleRootAfterResetArg{
Uid: currUserInfo.UID,
ResetSeqno: resetSeqno,
Prev: keybase1.ResetMerkleRoot{
Seqno: info.MerkleRoot.Seqno,
HashMeta: info.MerkleRoot.HashMeta,
},
})
} else {
res, err = k.userClient.FindNextMerkleRootAfterRevoke(ctx,
keybase1.FindNextMerkleRootAfterRevokeArg{
Uid: currUserInfo.UID,
Kid: kid,
Loc: info.SigChainLocation(),
Prev: info.MerkleRoot,
})
}
if m, ok := err.(libkb.MerkleClientError); ok && m.IsOldTree() { // nolint
k.log.CDebugf(ctx, "Merkle root is too old for checking "+
"the revoked key: %+v", err)
info.MerkleRoot.Seqno = 0
} else if err != nil {
return idutil.UserInfo{}, false, err
} else if res.Res != nil {
info.MerkleRoot = *res.Res
}
}
info.SetFilledInMerkle(true)
newUserInfo = currUserInfo.DeepCopy()
newUserInfo.RevokedVerifyingKeys[key] = info
k.setCachedUserInfo(newUserInfo.UID, newUserInfo)
break
}
return newUserInfo, exists, nil
}
// LoadUserPlusKeys implements the KeybaseService interface for
// KeybaseServiceBase.
func (k *KeybaseServiceBase) LoadUserPlusKeys(
ctx context.Context, uid keybase1.UID, pollForKID keybase1.KID,
offline keybase1.OfflineAvailability) (idutil.UserInfo, error) {
cachedUserInfo := k.getCachedUserInfo(uid)
if cachedUserInfo.Name != kbname.NormalizedUsername("") {
if pollForKID == keybase1.KID("") {
return cachedUserInfo, nil
}
// Skip the cache if pollForKID isn't present in
// `VerifyingKeys` or one of the revoked verifying keys.
for _, key := range cachedUserInfo.VerifyingKeys {
if key.KID().Equal(pollForKID) {
return cachedUserInfo, nil
}
}
// Check if the key is revoked, and fill in the merkle info in
// that case.
cachedUserInfo, exists, err := k.checkForRevokedVerifyingKey(
ctx, cachedUserInfo, pollForKID)
if err != nil {
return idutil.UserInfo{}, err
}
if exists {
return cachedUserInfo, nil
}
}
arg := keybase1.LoadUserPlusKeysV2Arg{
Uid: uid,
PollForKID: pollForKID,
Oa: offline,
}
res, err := k.userClient.LoadUserPlusKeysV2(ctx, arg)
if err != nil {
return idutil.UserInfo{}, err
}
userInfo, err := k.processUserPlusKeys(ctx, res)
if err != nil {
return idutil.UserInfo{}, err
}
if pollForKID != keybase1.KID("") {
// Fill in merkle info if we were explicitly trying to load a
// revoked key.
userInfo, _, err = k.checkForRevokedVerifyingKey(
ctx, userInfo, pollForKID)
if err != nil {
return idutil.UserInfo{}, err
}
}
return userInfo, nil
}
func (k *KeybaseServiceBase) getLastWriterInfo(
ctx context.Context, teamInfo idutil.TeamInfo, tlfType tlf.Type,
user keybase1.UID, verifyingKey kbfscrypto.VerifyingKey) (
idutil.TeamInfo, error) {
if _, ok := teamInfo.LastWriters[verifyingKey]; ok {
// Already cached, nothing to do.
return teamInfo, nil
}
res, err := k.teamsClient.FindNextMerkleRootAfterTeamRemovalBySigningKey(
ctx, keybase1.FindNextMerkleRootAfterTeamRemovalBySigningKeyArg{
Uid: user,
SigningKey: verifyingKey.KID(),
Team: teamInfo.TID,
IsPublic: tlfType == tlf.Public,
})
if err != nil {
return idutil.TeamInfo{}, err
}
// Copy any old data to avoid races.
newLastWriters := make(
map[kbfscrypto.VerifyingKey]keybase1.MerkleRootV2,
len(teamInfo.LastWriters)+1)
for k, v := range teamInfo.LastWriters {
newLastWriters[k] = v
}
newLastWriters[verifyingKey] = *res.Res
teamInfo.LastWriters = newLastWriters
return teamInfo, nil
}
var allowedLoadTeamRoles = map[keybase1.TeamRole]bool{
keybase1.TeamRole_NONE: true,
keybase1.TeamRole_WRITER: true,
keybase1.TeamRole_READER: true,
}
// LoadTeamPlusKeys implements the KeybaseService interface for
// KeybaseServiceBase.
func (k *KeybaseServiceBase) LoadTeamPlusKeys(
ctx context.Context, tid keybase1.TeamID, tlfType tlf.Type,
desiredKeyGen kbfsmd.KeyGen, desiredUser keybase1.UserVersion,
desiredKey kbfscrypto.VerifyingKey, desiredRole keybase1.TeamRole,
offline keybase1.OfflineAvailability) (idutil.TeamInfo, error) {
if !allowedLoadTeamRoles[desiredRole] {
panic(fmt.Sprintf("Disallowed team role: %v", desiredRole))
}
cachedTeamInfo := k.getCachedTeamInfo(tid)
if cachedTeamInfo.Name != kbname.NormalizedUsername("") {
// If the cached team info doesn't satisfy our desires, don't
// use it.
satisfiesDesires := true
if desiredKeyGen >= kbfsmd.FirstValidKeyGen {
// If `desiredKeyGen` is at most as large as the keygen in
// the cached latest team info, then our cached info
// satisfies our desires.
satisfiesDesires = desiredKeyGen <= cachedTeamInfo.LatestKeyGen
}
if satisfiesDesires && desiredUser.Uid.Exists() {
// If the user is in the writer map, that satisfies none, reader
// or writer desires.
satisfiesDesires = cachedTeamInfo.Writers[desiredUser.Uid]
if !satisfiesDesires {
if desiredRole == keybase1.TeamRole_NONE ||
desiredRole == keybase1.TeamRole_READER {
// If the user isn't a writer, but the desired
// role is a reader, we need to check the reader
// map explicitly.
satisfiesDesires = cachedTeamInfo.Readers[desiredUser.Uid]
} else if !desiredKey.IsNil() {
// If the desired role was at least a writer, but
// the user isn't currently a writer, see if they
// ever were.
var err error
cachedTeamInfo, err = k.getLastWriterInfo(
ctx, cachedTeamInfo, tlfType, desiredUser.Uid,
desiredKey)
if err != nil {
return idutil.TeamInfo{}, err
}
k.setCachedTeamInfo(tid, cachedTeamInfo)
}
}
}
if satisfiesDesires {
return cachedTeamInfo, nil
}
}
arg := keybase1.LoadTeamPlusApplicationKeysArg{
Id: tid,
Application: keybase1.TeamApplication_KBFS,
IncludeKBFSKeys: true,
Oa: offline,
}
if desiredKeyGen >= kbfsmd.FirstValidKeyGen {
arg.Refreshers.NeedApplicationsAtGenerationsWithKBFS =
map[keybase1.PerTeamKeyGeneration][]keybase1.TeamApplication{
keybase1.PerTeamKeyGeneration(desiredKeyGen): {
keybase1.TeamApplication_KBFS,
},
}
}
if desiredUser.Uid.Exists() && desiredKey.IsNil() {
arg.Refreshers.WantMembers = append(
arg.Refreshers.WantMembers, desiredUser)
arg.Refreshers.WantMembersRole = desiredRole
}
res, err := k.teamsClient.LoadTeamPlusApplicationKeys(ctx, arg)
if err != nil {
return idutil.TeamInfo{}, err
}
if tid != res.Id {
return idutil.TeamInfo{}, fmt.Errorf(
"TID doesn't match: %s vs %s", tid, res.Id)
}
info := idutil.TeamInfo{
Name: kbname.NormalizedUsername(res.Name),
TID: res.Id,
CryptKeys: make(map[kbfsmd.KeyGen]kbfscrypto.TLFCryptKey),
Writers: make(map[keybase1.UID]bool),
Readers: make(map[keybase1.UID]bool),
}
for _, key := range res.ApplicationKeys {
keyGen := kbfsmd.KeyGen(key.KeyGeneration)
info.CryptKeys[keyGen] =
kbfscrypto.MakeTLFCryptKey(key.Key)
if keyGen > info.LatestKeyGen {
info.LatestKeyGen = keyGen
}
}
for _, user := range res.Writers {
info.Writers[user.Uid] = true
}
for _, user := range res.OnlyReaders {
info.Readers[user.Uid] = true
}
// For subteams, get the root team ID.
if tid.IsSubTeam() {
rootID, err := k.teamsClient.GetTeamRootID(ctx, tid)
if err != nil {
return idutil.TeamInfo{}, err
}
info.RootID = rootID
}
// Fill in `LastWriters`, only if needed.
if desiredUser.Uid.Exists() && desiredRole == keybase1.TeamRole_WRITER &&
!info.Writers[desiredUser.Uid] && !desiredKey.IsNil() {
info, err = k.getLastWriterInfo(
ctx, info, tlfType, desiredUser.Uid, desiredKey)
if err != nil {
return idutil.TeamInfo{}, err
}
}
k.setCachedTeamInfo(tid, info)
return info, nil
}
// CreateTeamTLF implements the KeybaseService interface for
// KeybaseServiceBase.
func (k *KeybaseServiceBase) CreateTeamTLF(
ctx context.Context, teamID keybase1.TeamID, tlfID tlf.ID) (err error) {
return k.kbfsClient.CreateTLF(ctx, keybase1.CreateTLFArg{
TeamID: teamID,
TlfID: keybase1.TLFID(tlfID.String()),
})
}
// GetTeamSettings implements the KeybaseService interface for
// KeybaseServiceBase.
func (k *KeybaseServiceBase) GetTeamSettings(
ctx context.Context, teamID keybase1.TeamID,
offline keybase1.OfflineAvailability) (
keybase1.KBFSTeamSettings, error) {
// TODO: get invalidations from the server and cache the settings?
return k.kbfsClient.GetKBFSTeamSettings(
ctx, keybase1.GetKBFSTeamSettingsArg{
TeamID: teamID,
Oa: offline,
})
}
func (k *KeybaseServiceBase) getCurrentMerkleRoot(ctx context.Context) (
keybase1.MerkleRootV2, time.Time, error) {
const merkleFreshnessMs = int(time.Second * 60 / time.Millisecond)
res, err := k.merkleClient.GetCurrentMerkleRoot(ctx, merkleFreshnessMs)
if err != nil {
return keybase1.MerkleRootV2{}, time.Time{}, err
}
return res.Root, keybase1.FromTime(res.UpdateTime), nil
}
// GetCurrentMerkleRoot implements the KeybaseService interface for
// KeybaseServiceBase.
func (k *KeybaseServiceBase) GetCurrentMerkleRoot(ctx context.Context) (
keybase1.MerkleRootV2, time.Time, error) {
// Refresh the cached value in the background if the cached value
// is older than 30s; if our cached value is more than 60s old,
// block.
_, root, rootTime, err := k.merkleRoot.Get(
ctx, 30*time.Second, 60*time.Second)
return root, rootTime, err
}
// VerifyMerkleRoot implements the KBPKI interface for KeybaseServiceBase.
func (k *KeybaseServiceBase) VerifyMerkleRoot(
ctx context.Context, root keybase1.MerkleRootV2,
kbfsRoot keybase1.KBFSRoot) error {
return k.merkleClient.VerifyMerkleRootAndKBFS(ctx,
keybase1.VerifyMerkleRootAndKBFSArg{
Root: root,
ExpectedKBFSRoot: kbfsRoot,
})
}
func (k *KeybaseServiceBase) processUserPlusKeys(
ctx context.Context, upk keybase1.UserPlusKeysV2AllIncarnations) (
idutil.UserInfo, error) {
verifyingKeys, cryptPublicKeys, kidNames, err := filterKeys(
upk.Current.DeviceKeys)
if err != nil {
return idutil.UserInfo{}, err
}
revokedVerifyingKeys, revokedCryptPublicKeys, revokedKidNames, err :=
k.filterRevokedKeys(
ctx, upk.Current.Uid, upk.Current.DeviceKeys, upk.Current.Reset)
if err != nil {
return idutil.UserInfo{}, err
}
if len(revokedKidNames) > 0 {
for k, v := range revokedKidNames {
kidNames[k] = v
}
}
for _, incarnation := range upk.PastIncarnations {
revokedVerifyingKeysPast, revokedCryptPublicKeysPast,
revokedKidNames, err :=
k.filterRevokedKeys(
ctx, incarnation.Uid, incarnation.DeviceKeys, incarnation.Reset)
if err != nil {
return idutil.UserInfo{}, err
}
if len(revokedKidNames) > 0 {
for k, v := range revokedKidNames {
kidNames[k] = v
}
}
for k, v := range revokedVerifyingKeysPast {
revokedVerifyingKeys[k] = v
}
for k, v := range revokedCryptPublicKeysPast {
revokedCryptPublicKeys[k] = v
}
}
u := idutil.UserInfo{
Name: kbname.NewNormalizedUsername(
upk.Current.Username),
UID: upk.Current.Uid,