/
login_state.go
1347 lines (1163 loc) · 36.7 KB
/
login_state.go
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// Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.
package libkb
import (
"errors"
"fmt"
"runtime/debug"
"time"
keybase1 "github.com/keybase/client/go/protocol/keybase1"
"golang.org/x/net/context"
)
// PassphraseGeneration represents which generation of the passphrase is
// currently in use. It's used to guard against race conditions in which
// the passphrase is changed on one device which the other still has it cached.
type PassphraseGeneration int
// LoginState controls the state of the current user's login
// session and associated variables. It also serializes access to
// the various Login functions and requests for the Account
// object.
type LoginState struct {
Contextified
account *Account
loginReqs chan loginReq
acctReqs chan acctReq
shutdown chan struct{}
activeReq string
}
// LoginContext is passed to all loginHandler functions. It
// allows them safe access to various parts of the LoginState during
// the login process.
type LoginContext interface {
LoggedInLoad() (bool, error)
LoggedInProvisioned() (bool, error)
LoggedInProvisionedCheck() (bool, error)
Logout() error
CreateStreamCache(tsec Triplesec, pps *PassphraseStream)
CreateStreamCacheViaStretch(passphrase string) error
PassphraseStreamCache() *PassphraseStreamCache
ClearStreamCache()
SetStreamGeneration(gen PassphraseGeneration, nilPPStreamOK bool)
GetStreamGeneration() PassphraseGeneration
CreateLoginSessionWithSalt(emailOrUsername string, salt []byte) error
LoadLoginSession(emailOrUsername string) error
LoginSession() *LoginSession
ClearLoginSession()
LocalSession() *Session
GetUID() keybase1.UID
EnsureUsername(username NormalizedUsername)
SaveState(sessionID, csrf string, username NormalizedUsername, uid keybase1.UID, deviceID keybase1.DeviceID) error
Keyring() (*SKBKeyringFile, error)
ClearKeyring()
LockedLocalSecretKey(ska SecretKeyArg) (*SKB, error)
SecretSyncer() *SecretSyncer
RunSecretSyncer(uid keybase1.UID) error
SetCachedSecretKey(ska SecretKeyArg, key GenericKey, device *Device) error
SetUnlockedPaperKey(sig GenericKey, enc GenericKey) error
SetLKSec(lksec *LKSec)
GetUnlockedPaperEncKey() GenericKey
GetUnlockedPaperSigKey() GenericKey
}
type LoggedInHelper interface {
GetUID() keybase1.UID
LoggedInLoad() (bool, error)
}
type loginHandler func(LoginContext) error
type acctHandler func(*Account)
type loginReq struct {
f loginHandler
after afterFn
res chan error
name string
id string
ctime time.Time
}
func newLoginReq(f loginHandler, after afterFn, name string) *loginReq {
req := loginReq{
f: f,
after: after,
res: make(chan error),
name: name,
id: RandStringB64(2),
ctime: time.Now(),
}
return &req
}
func (r loginReq) String() string {
return fmt.Sprintf("%s (%s)", r.Description(), time.Since(r.ctime))
}
func (r loginReq) Description() string {
return fmt.Sprintf("loginReq %s [%s]", r.name, r.id)
}
type acctReq struct {
f acctHandler
done chan struct{}
name string
id string
ctime time.Time
}
func newAcctReq(f acctHandler, name string) *acctReq {
req := acctReq{
f: f,
done: make(chan struct{}),
name: name,
id: RandStringB64(2),
ctime: time.Now(),
}
return &req
}
func (r acctReq) String() string {
return fmt.Sprintf("%s (%s)", r.Description(), time.Since(r.ctime))
}
func (r acctReq) Description() string {
return fmt.Sprintf("acctReq %s [%s]", r.name, r.id)
}
type loginAPIResult struct {
sessionID string
csrfToken string
uid keybase1.UID
username string
ppGen PassphraseGeneration
}
type afterFn func(LoginContext) error
// NewLoginState creates a LoginState and starts the request
// handler goroutine.
func NewLoginState(g *GlobalContext) *LoginState {
res := &LoginState{
Contextified: NewContextified(g),
account: NewAccount(g),
loginReqs: make(chan loginReq),
acctReqs: make(chan acctReq),
shutdown: make(chan struct{}),
}
go res.requests()
return res
}
func (s *LoginState) LoginWithPrompt(username string, loginUI LoginUI, secretUI SecretUI, after afterFn) (err error) {
s.G().Log.Debug("+ LoginWithPrompt(%s) called", username)
defer func() { s.G().Log.Debug("- LoginWithPrompt -> %s", ErrToOk(err)) }()
err = s.loginHandle(func(lctx LoginContext) error {
return s.loginWithPromptHelper(lctx, username, loginUI, secretUI, false)
}, after, "loginWithPromptHelper")
return
}
func (s *LoginState) LoginWithStoredSecret(username string, after afterFn) (err error) {
s.G().Log.Debug("+ LoginWithStoredSecret(%s) called", username)
defer func() { s.G().Log.Debug("- LoginWithStoredSecret -> %s", ErrToOk(err)) }()
err = s.loginHandle(func(lctx LoginContext) error {
return s.loginWithStoredSecret(lctx, username)
}, after, "loginWithStoredSecret")
return
}
func (s *LoginState) LoginWithPassphrase(username, passphrase string, storeSecret bool, after afterFn) (err error) {
s.G().Log.Debug("+ LoginWithPassphrase(%s) called", username)
defer func() { s.G().Log.Debug("- LoginWithPassphrase -> %s", ErrToOk(err)) }()
err = s.loginHandle(func(lctx LoginContext) error {
return s.loginWithPassphrase(lctx, username, passphrase, storeSecret)
}, after, "loginWithPassphrase")
return
}
func (s *LoginState) LoginWithKey(lctx LoginContext, user *User, key GenericKey, after afterFn) (err error) {
s.G().Log.Debug("+ LoginWithKey(%s) called", user.GetName())
defer func() { s.G().Log.Debug("- LoginWithKey -> %s", ErrToOk(err)) }()
err = s.loginHandle(func(lctx LoginContext) error {
return s.loginWithKey(lctx, user, key)
}, after, "loginWithKey")
return
}
func (s *LoginState) Logout() error {
err := s.loginHandle(func(a LoginContext) error {
return s.logout(a)
}, nil, "logout")
return err
}
// ExternalFunc is for having the LoginState handler call a
// function outside of LoginState. The current use case is
// for signup, so that no logins/logouts happen while a signup is
// happening.
func (s *LoginState) ExternalFunc(f loginHandler, name string) error {
return s.loginHandle(f, nil, name)
}
func (s *LoginState) VerifyEmailAddress(email string, secretUI SecretUI, after afterFn) (err error) {
defer Trace(s.G().Log, "VerifyEmailAddress", func() error { return err })()
err = s.loginHandle(func(lctx LoginContext) error {
return s.tryPassphrasePromptLogin(lctx, email, secretUI)
}, after, "loginWithPassphrase")
return err
}
func (s *LoginState) Shutdown() error {
var err error
aerr := s.Account(func(a *Account) {
err = a.Shutdown()
close(s.shutdown)
}, "LoginState - Shutdown")
if aerr != nil {
return aerr
}
if err != nil {
return err
}
return nil
}
// GetPassphraseStream either returns a cached, verified passphrase stream
// (maybe from a previous login) or generates a new one via Login. It will
// return the current Passphrase stream on success or an error on failure.
func (s *LoginState) GetPassphraseStream(ui SecretUI) (pps *PassphraseStream, err error) {
s.G().Log.Debug("+ GetPassphraseStream() called")
defer func() { s.G().Log.Debug("- GetPassphraseStream() -> %s", ErrToOk(err)) }()
pps, err = s.GetPassphraseStreamForUser(ui, string(s.G().Env.GetUsername()))
return
}
// GetPassphraseStreamForUser either returns a cached, verified passphrase stream
// (maybe from a previous login) or generates a new one via Login. It will
// return the current Passphrase stream on success or an error on failure.
func (s *LoginState) GetPassphraseStreamForUser(ui SecretUI, username string) (pps *PassphraseStream, err error) {
s.G().Log.Debug("+ GetPassphraseStreamForUser() called")
defer func() { s.G().Log.Debug("- GetPassphraseStreamForUser() -> %s", ErrToOk(err)) }()
pps, err = s.PassphraseStream()
if err != nil {
return nil, err
}
if pps != nil {
return pps, nil
}
err = s.loginHandle(func(lctx LoginContext) error {
return s.loginWithPromptHelper(lctx, username, nil, ui, true)
}, nil, "LoginState - GetPassphraseStreamForUser")
if err != nil {
return nil, err
}
pps, err = s.PassphraseStream()
if err != nil {
return nil, err
}
if pps != nil {
return pps, nil
}
err = InternalError{"No cached keystream data after login attempt"}
return nil, err
}
// GetPassphraseStreamWithPassphrase either returns a cached, verified
// passphrase stream (maybe from a previous login) or generates a new one via
// Login. It will return the current Passphrase stream on success or an error
// on failure.
func (s *LoginState) GetPassphraseStreamWithPassphrase(passphrase string) (pps *PassphraseStream, err error) {
s.G().Log.Debug("+ GetPassphraseStreamWithPassphrase() called")
defer func() { s.G().Log.Debug("- GetPassphraseStreamWithPassphrase() -> %s", ErrToOk(err)) }()
username := string(s.G().Env.GetUsername())
if username == "" {
return nil, fmt.Errorf("No current user to unlock.")
}
pps, err = s.PassphraseStream()
if err != nil {
return nil, err
}
if pps != nil {
return pps, nil
}
err = s.loginHandle(func(lctx LoginContext) error {
return s.passphraseLogin(lctx, username, passphrase, nil, "")
}, nil, "LoginState - GetPassphraseStreamWithPassphrase")
if err != nil {
return nil, err
}
pps, err = s.PassphraseStream()
if err != nil {
return nil, err
}
if pps != nil {
return pps, nil
}
err = InternalError{"No cached keystream data after login attempt"}
return nil, err
}
func (s *LoginState) getStoredPassphraseStream(username NormalizedUsername) (*PassphraseStream, error) {
fullSecret, err := s.G().SecretStoreAll.RetrieveSecret(s.G().Env.GetUsername())
if err != nil {
return nil, err
}
lks := NewLKSecWithFullSecret(fullSecret, s.G().Env.GetUID(), s.G())
if err = lks.LoadServerHalf(nil); err != nil {
return nil, err
}
stream, err := NewPassphraseStreamLKSecOnly(lks)
if err != nil {
return nil, err
}
return stream, nil
}
// GetPassphraseStreamStored either returns a cached, verified passphrase
// stream from a previous login, the secret store, or generates a new one via
// login.
func (s *LoginState) GetPassphraseStreamStored(ui SecretUI) (pps *PassphraseStream, err error) {
s.G().Log.Debug("+ GetPassphraseStreamStored() called")
defer func() { s.G().Log.Debug("- GetPassphraseStreamStored() -> %s", ErrToOk(err)) }()
// 1. try cached
s.G().Log.Debug("| trying cached passphrase stream")
full, err := s.PassphraseStream()
if err != nil {
return pps, err
}
if full != nil {
s.G().Log.Debug("| cached passphrase stream ok, using it")
return full, nil
}
// 2. try from secret store
if s.G().SecretStoreAll != nil {
s.G().Log.Debug("| trying to get passphrase stream from secret store")
pps, err = s.getStoredPassphraseStream(s.G().Env.GetUsername())
if err == nil {
s.G().Log.Debug("| got passphrase stream from secret store")
return pps, nil
}
s.G().Log.Debug("| failed to get passphrase stream from secret store: %s", err)
}
// 3. login and get it
s.G().Log.Debug("| using full GetPassphraseStream")
full, err = s.GetPassphraseStream(ui)
if err != nil {
return pps, err
}
if full != nil {
s.G().Log.Debug("| success using full GetPassphraseStream")
return full, nil
}
return pps, nil
}
// GetVerifiedTripleSec either returns a cached, verified Triplesec
// or generates a new one that's verified via Login.
func (s *LoginState) GetVerifiedTriplesec(ui SecretUI) (ret Triplesec, gen PassphraseGeneration, err error) {
err = s.Account(func(a *Account) {
ret = a.PassphraseStreamCache().Triplesec()
gen = a.GetStreamGeneration()
}, "LoginState - GetVerifiedTriplesec - first")
if err != nil || ret != nil {
return
}
if err = s.verifyPassphraseWithServer(ui); err != nil {
return
}
err = s.Account(func(a *Account) {
ret = a.PassphraseStreamCache().Triplesec()
gen = a.GetStreamGeneration()
}, "LoginState - GetVerifiedTriplesec - second")
if err != nil || ret != nil {
return
}
err = InternalError{"No cached keystream data after login attempt"}
return
}
// VerifyPlaintextPassphrase verifies that the supplied plaintext passphrase
// is indeed the correct passphrase for the logged in user. This is accomplished
// via a login request. The side effect will be that we'll retrieve the
// correct generation number of the current passphrase from the server.
func (s *LoginState) VerifyPlaintextPassphrase(pp string) (ppStream *PassphraseStream, err error) {
err = s.loginHandle(func(lctx LoginContext) error {
ret := s.verifyPlaintextPassphraseForLoggedInUser(lctx, pp)
if ret == nil {
ppStream = lctx.PassphraseStreamCache().PassphraseStream()
}
return ret
}, nil, "VerifyPlaintextPassphrase")
return
}
func ComputeLoginPackage(lctx LoginContext, username string) (ret PDPKALoginPackage, err error) {
loginSession, err := lctx.LoginSession().Session()
if err != nil {
return ret, err
}
if loginSession == nil {
return ret, errors.New("nil login session")
}
ps := lctx.PassphraseStreamCache().PassphraseStream()
if username == "" {
return computeLoginPackageFromUID(lctx.GetUID(), ps, loginSession)
}
return computeLoginPackageFromEmailOrUsername(username, ps, loginSession)
}
func (s *LoginState) ResetAccount(un string) (err error) {
return s.resetOrDelete(un, "nuke")
}
func (s *LoginState) DeleteAccount(un string) (err error) {
return s.resetOrDelete(un, "delete")
}
func (s *LoginState) resetOrDelete(un string, which string) (err error) {
var aerr error
err = s.loginHandle(func(lctx LoginContext) error {
aerr = lctx.LoadLoginSession(un)
if aerr != nil {
return aerr
}
pdpka, aerr := ComputeLoginPackage(lctx, un)
if aerr != nil {
return aerr
}
arg := APIArg{
Endpoint: which,
SessionType: APISessionTypeREQUIRED,
Args: NewHTTPArgs(),
SessionR: lctx.LocalSession(),
}
pdpka.PopulateArgs(&arg.Args)
res, aerr := s.G().API.Post(arg)
if aerr == nil {
s.G().Log.Info("%s Result: %+v\n", which, res.AppStatus)
}
return aerr
}, nil, ("ResetAccount:" + which))
if aerr != nil {
return aerr
}
return err
}
func (s *LoginState) postLoginToServer(lctx LoginContext, eOu string, lp PDPKALoginPackage) (*loginAPIResult, error) {
arg := APIArg{
Endpoint: "login",
SessionType: APISessionTypeNONE,
Args: HTTPArgs{
"email_or_username": S{eOu},
},
AppStatusCodes: []int{SCOk, SCBadLoginPassword, SCBadLoginUserNotFound},
}
lp.PopulateArgs(&arg.Args)
res, err := s.G().API.Post(arg)
if err != nil {
return nil, err
}
if res.AppStatus.Code == SCBadLoginPassword {
err = PassphraseError{"server rejected login attempt"}
return nil, err
}
if res.AppStatus.Code == SCBadLoginUserNotFound {
return nil, NotFoundError{}
}
b := res.Body
sessionID, err := b.AtKey("session").GetString()
if err != nil {
return nil, err
}
csrfToken, err := b.AtKey("csrf_token").GetString()
if err != nil {
return nil, err
}
uid, err := GetUID(b.AtKey("uid"))
if err != nil {
return nil, err
}
uname, err := b.AtKey("me").AtKey("basics").AtKey("username").GetString()
if err != nil {
return nil, err
}
ppGen, err := b.AtPath("me.basics.passphrase_generation").GetInt()
if err != nil {
return nil, err
}
return &loginAPIResult{sessionID, csrfToken, uid, uname, PassphraseGeneration(ppGen)}, nil
}
func (s *LoginState) saveLoginState(lctx LoginContext, res *loginAPIResult, nilPPStreamOK bool) error {
lctx.SetStreamGeneration(res.ppGen, nilPPStreamOK)
return lctx.SaveState(res.sessionID, res.csrfToken, NewNormalizedUsername(res.username), res.uid, s.G().Env.GetDeviceIDForUsername(NewNormalizedUsername(res.username)))
}
func (r PostAuthProofRes) loginResult() (*loginAPIResult, error) {
uid, err := UIDFromHex(r.UIDHex)
if err != nil {
return nil, err
}
ret := &loginAPIResult{
sessionID: r.SessionID,
csrfToken: r.CSRFToken,
uid: uid,
username: r.Username,
ppGen: PassphraseGeneration(r.PPGen),
}
return ret, nil
}
// A function that takes a Keyrings object, a user, and returns a
// particular key for that user.
type getSecretKeyFn func(*Keyrings, *User) (GenericKey, error)
// pubkeyLoginHelper looks for a locally available private key and
// tries to establish a session via public key signature.
func (s *LoginState) pubkeyLoginHelper(lctx LoginContext, username string, getSecretKeyFn getSecretKeyFn) (err error) {
s.G().Log.Debug("+ pubkeyLoginHelper()")
defer func() {
if err != nil {
if e := lctx.SecretSyncer().Clear(); e != nil {
s.G().Log.Info("error clearing secret syncer: %s", e)
}
}
s.G().Log.Debug("- pubkeyLoginHelper() -> %s", ErrToOk(err))
}()
nu := NewNormalizedUsername(username)
if _, err = s.G().Env.GetConfig().GetUserConfigForUsername(nu); err != nil {
s.G().Log.Debug("| No Userconfig for %s: %s", username, err)
return
}
var me *User
if me, err = LoadUser(LoadUserArg{Name: username, LoginContext: lctx, Contextified: NewContextified(s.G())}); err != nil {
return
}
lctx.RunSecretSyncer(me.GetUID())
if !lctx.SecretSyncer().HasDevices() {
s.G().Log.Debug("| No synced devices, pubkey login impossible.")
err = NoDeviceError{Reason: "no synced devices during pubkey login"}
return err
}
var key GenericKey
if key, err = getSecretKeyFn(s.G().Keyrings, me); err != nil {
return err
}
return s.pubkeyLoginWithKey(lctx, me, key)
}
func (s *LoginState) pubkeyLoginWithKey(lctx LoginContext, me *User, key GenericKey) error {
if err := lctx.LoadLoginSession(me.GetName()); err != nil {
return err
}
loginSessionEncoded, err := lctx.LoginSession().SessionEncoded()
if err != nil {
return err
}
proof, err := me.AuthenticationProof(key, loginSessionEncoded, AuthExpireIn)
if err != nil {
return err
}
sig, _, _, err := SignJSON(proof, key)
if err != nil {
return err
}
arg := PostAuthProofArg{
uid: me.id,
sig: sig,
key: key,
}
pres, err := PostAuthProof(context.TODO(), s.G(), arg)
if err != nil {
return err
}
res, err := pres.loginResult()
if err != nil {
return err
}
return s.saveLoginState(lctx, res, true)
}
func (s *LoginState) checkLoggedIn(lctx LoginContext, username string, force bool) (loggedIn bool, err error) {
s.G().Log.Debug("+ checkedLoggedIn()")
defer func() { s.G().Log.Debug("- checkedLoggedIn() -> %t, %s", loggedIn, ErrToOk(err)) }()
var loggedInTmp bool
if loggedInTmp, err = lctx.LoggedInLoad(); err != nil {
s.G().Log.Debug("| Session failed to load")
return
}
nu1 := lctx.LocalSession().GetUsername()
nu2 := NewNormalizedUsername(username)
if loggedInTmp && len(nu2) > 0 && nu1 != nil && !nu1.Eq(nu2) {
err = LoggedInWrongUserError{ExistingName: *nu1, AttemptedName: nu2}
return false, err
}
if !force && loggedInTmp {
s.G().Log.Debug("| Our session token is still valid; we're logged in")
loggedIn = true
}
return
}
func (s *LoginState) switchUser(lctx LoginContext, username string) error {
if len(username) == 0 {
// this isn't an error
return nil
}
if !CheckUsername.F(username) {
return errors.New("invalid username provided to switchUser")
}
nu := NewNormalizedUsername(username)
if err := s.G().Env.GetConfigWriter().SwitchUser(nu); err != nil {
if _, ok := err.(UserNotFoundError); ok {
s.G().Log.Debug("| No user %s found; clearing out config", username)
return nil
}
s.G().Log.Debug("| Can't switch user to %s: %s", username, err)
return err
}
lctx.EnsureUsername(nu)
s.G().Log.Debug("| Successfully switched user to %s", username)
return nil
}
// Like pubkeyLoginHelper, but ignores most errors.
func (s *LoginState) tryPubkeyLoginHelper(lctx LoginContext, username string, getSecretKeyFn getSecretKeyFn) (loggedIn bool, err error) {
if err = s.pubkeyLoginHelper(lctx, username, getSecretKeyFn); err == nil {
s.G().Log.Debug("| Pubkey login succeeded")
loggedIn = true
return
}
if _, ok := err.(CanceledError); ok {
s.G().Log.Debug("| Canceled pubkey login, so cancel login")
return
}
s.G().Log.Debug("| Public key login failed, falling back: %s", err)
err = nil
return
}
func (s *LoginState) tryPassphrasePromptLogin(lctx LoginContext, username string, secretUI SecretUI) (err error) {
retryMsg := ""
retryCount := 3
for i := 0; i < retryCount; i++ {
err = s.passphraseLogin(lctx, username, "", secretUI, retryMsg)
if err == nil {
return
}
if _, badpw := err.(PassphraseError); !badpw {
return
}
retryMsg = err.Error()
}
return
}
func (s *LoginState) getEmailOrUsername(lctx LoginContext, username *string, loginUI LoginUI) (err error) {
if len(*username) != 0 {
return
}
*username = s.G().Env.GetEmailOrUsername()
if len(*username) != 0 {
return
}
if loginUI != nil {
if *username, err = loginUI.GetEmailOrUsername(context.TODO(), 0); err != nil {
*username = ""
return
}
}
if len(*username) == 0 {
err = NoUsernameError{}
}
if err != nil {
return err
}
// username set, so redo config
if err = s.G().ConfigureConfig(); err != nil {
return
}
return s.switchUser(lctx, *username)
}
func (s *LoginState) verifyPlaintextPassphraseForLoggedInUser(lctx LoginContext, passphrase string) (err error) {
s.G().Log.Debug("+ LoginState.verifyPlaintextPassphraseForLoggedInUser")
defer func() {
s.G().Log.Debug("- LoginState.verifyPlaintextPassphraseForLoggedInUser -> %s", ErrToOk(err))
}()
var username string
if err = s.getEmailOrUsername(lctx, &username, nil); err != nil {
return
}
// For a login reattempt
lctx.ClearStreamCache()
// Since a login session is likely stale by now (if we still have one)
lctx.ClearLoginSession()
// Pass nil SecretUI (since we don't want to trigger the UI)
// and also no retry message.
err = s.passphraseLogin(lctx, username, passphrase, nil, "")
return
}
func (s *LoginState) passphraseLogin(lctx LoginContext, username, passphrase string, secretUI SecretUI, retryMsg string) (err error) {
s.G().Log.Debug("+ LoginState#passphraseLogin (username=%s)", username)
defer func() {
s.G().Log.Debug("- LoginState#passphraseLogin -> %s", ErrToOk(err))
}()
if err = lctx.LoadLoginSession(username); err != nil {
return
}
storeSecret, err := s.stretchPassphraseIfNecessary(lctx, username, passphrase, secretUI, retryMsg)
if err != nil {
return err
}
lp, err := ComputeLoginPackage(lctx, username)
if err != nil {
return err
}
res, err := s.postLoginToServer(lctx, username, lp)
if err != nil {
lctx.ClearStreamCache()
return err
}
if err := s.saveLoginState(lctx, res, false); err != nil {
return err
}
s.G().Log.Debug("passphraseLogin success")
// If storeSecret is set and there is a device ID, then try to store the secret.
//
// Ignore some errors.
//
// Can get here without a device ID during device provisioning as this is used to establish a login
// session before the device keys are generated.
if storeSecret && !s.G().Env.GetDeviceIDForUsername(NewNormalizedUsername(username)).IsNil() {
err = s.doStoreSecret(lctx, username, res)
if err != nil {
s.G().Log.Debug("| LoginState#passphraseLogin: emergency logout")
tmpErr := lctx.Logout()
if tmpErr != nil {
s.G().Log.Debug("error in emergency logout: %s", tmpErr)
}
return err
}
}
if repairErr := RunBug3964Repairman(s.G(), lctx, lctx.PassphraseStreamCache().PassphraseStream()); repairErr != nil {
s.G().Log.Debug("In Bug 3964 repair: %s", repairErr)
}
return nil
}
func (s *LoginState) doStoreSecret(lctx LoginContext, username string, res *loginAPIResult) (err error) {
defer s.G().Trace("LoginState#doStoreSecret", func() error { return err })()
pps := lctx.PassphraseStreamCache().PassphraseStream()
if pps == nil {
return errors.New("nil passphrase stream")
}
lks := NewLKSec(pps, res.uid, s.G())
secret, err := lks.GetSecret(lctx)
if err != nil {
s.G().Log.Debug("error getting lksec secret for SecretStore: %s", err)
return err
}
secretStore := NewSecretStore(s.G(), NewNormalizedUsername(username))
if secretStore == nil {
s.G().Log.Debug("secret store requested, but unable to create one")
return nil
}
storeSecretErr := secretStore.StoreSecret(secret)
if storeSecretErr != nil {
// Ignore any errors storing the secret.
s.G().Log.Debug("(ignoring) StoreSecret error: %s", storeSecretErr)
return nil
}
return nil
}
func (s *LoginState) stretchPassphraseIfNecessary(lctx LoginContext, un string, pp string, ui SecretUI, retry string) (storeSecret bool, err error) {
s.G().Log.Debug("+ stretchPassphraseIfNecessary (%s)", un)
defer func() {
s.G().Log.Debug("- stretchPassphraseIfNecessary -> %s", ErrToOk(err))
}()
if lctx.PassphraseStreamCache().Valid() {
s.G().Log.Debug("| stretchPassphraseIfNecessary: passphrase stream cached")
// already have stretched passphrase cached
return false, nil
}
if len(pp) == 0 {
if ui == nil {
return false, NoUIError{"secret"}
}
s.G().Log.Debug("| stretchPassphraseIfNecessary: getting keybase passphrase via ui")
res, err := GetKeybasePassphrase(s.G(), ui, un, retry)
if err != nil {
return false, err
}
pp = res.Passphrase
storeSecret = res.StoreSecret
}
if err = lctx.CreateStreamCacheViaStretch(pp); err != nil {
return false, err
}
return storeSecret, nil
}
func (s *LoginState) verifyPassphraseWithServer(ui SecretUI) error {
return s.loginHandle(func(lctx LoginContext) error {
return s.loginWithPromptHelper(lctx, s.G().Env.GetUsername().String(), nil, ui, true)
}, nil, "LoginState - verifyPassphrase")
}
func (s *LoginState) loginWithPromptHelper(lctx LoginContext, username string, loginUI LoginUI, secretUI SecretUI, force bool) (err error) {
var loggedIn bool
if loggedIn, err = s.checkLoggedIn(lctx, username, force); err != nil || loggedIn {
return
}
if err = s.switchUser(lctx, username); err != nil {
return
}
if err = s.getEmailOrUsername(lctx, &username, loginUI); err != nil {
return
}
getSecretKeyFn := func(keyrings *Keyrings, me *User) (GenericKey, error) {
ska := SecretKeyArg{
Me: me,
KeyType: DeviceSigningKeyType,
}
return keyrings.GetSecretKeyWithoutPrompt(lctx, ska)
}
// If we're forcing a login to check our passphrase (as in when we're called
// from verifyPassphraseWithServer), then don't use public key login at all. See issue #510.
if !force {
if loggedIn, err = s.tryPubkeyLoginHelper(lctx, username, getSecretKeyFn); err != nil || loggedIn {
return
}
}
return s.tryPassphrasePromptLogin(lctx, username, secretUI)
}
// loginHandle creates a loginReq from a loginHandler and puts it
// in the loginReqs channel. The requests goroutine will handle
// it, calling f and putting the error on the request res channel.
// Once the error is on the res channel, loginHandle returns it.
func (s *LoginState) loginHandle(f loginHandler, after afterFn, name string) error {
req := newLoginReq(f, after, name)
s.G().Log.Debug("+ loginHandle sending: %s", req.Description())
s.loginReqs <- *req
s.G().Log.Debug("* loginHandle sent: %s", req)
err := <-req.res
s.G().Log.Debug("- loginHandle done: %s [%s]", req, ErrToOk(err))
return err
}
// acctHandle creates an acctReq from an acctHandler and puts it
// in the acctReqs channel. It waits for the request handler to
// close the done channel in the acctReq before returning.
// For debugging purposes, there is a 5s timeout to help find any
// cases where an account or login request is attempted while
// another account or login request is in process.
func (s *LoginState) acctHandle(f acctHandler, name string) error {
req := newAcctReq(f, name)
s.G().Log.Debug("+ acctHandle sending: %s", req.Description())
select {
case s.acctReqs <- *req:
s.G().Log.Debug("* acctHandle sent: %s", req)
case <-time.After(5 * time.Second * CITimeMultiplier(s)):
s.G().Log.Debug("- acctHandle timeout: %s, active request: %s", req, s.activeReq)
if s.G().Env.GetDebug() {
debug.PrintStack()
}
return LoginStateTimeoutError{
ActiveRequest: s.activeReq,
AttemptedRequest: req.Description(),
Duration: time.Since(req.ctime),
}
}
// wait for request to finish
<-req.done
s.G().Log.Debug("- acctHandle done: %s", req)
return nil
}
// requests runs in a single goroutine. It selects login or
// account requests and handles them appropriately. It runs until
// the loginReqs and acctReqs channels are closed.
func (s *LoginState) requests() {
defer s.G().Log.Debug("- LoginState: Leaving request loop")
// Run a cleanup routine on the Account object every minute.
// We're supposed to timeout & cleanup Paper Keys after an hour of inactivity.
maketimer := func() <-chan time.Time { return s.G().Clock().After(1 * time.Minute) }
timer := maketimer()
s.G().Log.Debug("+ LoginState: Running request loop")
for {
select {
case <-s.shutdown:
s.G().Log.Debug("- LoginState: shutdown chan closed, exiting requests loop")
return
case req := <-s.loginReqs:
s.activeReq = req.Description()
s.G().Log.Debug("* LoginState running login request: %s", s.activeReq)
err := req.f(s.account)
if err == nil && req.after != nil {
// f ran without error, so call after function
s.G().Log.Debug("* LoginState running after func for request: %s", s.activeReq)
req.res <- req.after(s.account)
} else {
// either f returned an error, or there's no after function
req.res <- err