func (e *Kex2Provisionee) pushLKSServerHalf() error {
// make new lks
ppstream := libkb.NewPassphraseStream(e.pps.PassphraseStream)
ppstream.SetGeneration(libkb.PassphraseGeneration(e.pps.Generation))
e.lks = libkb.NewLKSec(ppstream, e.uid, e.G())
e.lks.GenerateServerHalf()
// make client half recovery
chrKID := e.dh.GetKID()
chrText, err := e.lks.EncryptClientHalfRecovery(e.dh)
if err != nil {
return err
}
err = libkb.PostDeviceLKS(e, e.device.ID, e.device.Type, e.lks.GetServerHalf(), e.lks.Generation(), chrText, chrKID)
if err != nil {
return err
}
// Sync the LKS stuff back from the server, so that subsequent
// attempts to use public key login will work.
/*
err = e.G().LoginState().RunSecretSyncer(e.uid)
if err != nil {
return err
}
*/
return nil
}
func (s *SignupJoinEngine) Post(arg SignupJoinEngineRunArg) (err error) {
var res *libkb.APIRes
var ppGenTmp int
res, err = s.G().API.Post(libkb.APIArg{
Endpoint: "signup",
Args: libkb.HTTPArgs{
"salt": libkb.S{Val: hex.EncodeToString(arg.PWSalt)},
"pwh": libkb.S{Val: hex.EncodeToString(arg.PWHash)},
"username": libkb.S{Val: arg.Username},
"email": libkb.S{Val: arg.Email},
"invitation_id": libkb.S{Val: arg.InviteCode},
"pwh_version": libkb.I{Val: int(triplesec.Version)},
"skip_mail": libkb.B{Val: arg.SkipMail},
}})
if err == nil {
s.username = libkb.NewNormalizedUsername(arg.Username)
libkb.GetUIDVoid(res.Body.AtKey("uid"), &s.uid, &err)
res.Body.AtKey("session").GetStringVoid(&s.session, &err)
res.Body.AtKey("csrf_token").GetStringVoid(&s.csrf, &err)
res.Body.AtPath("me.basics.passphrase_generation").GetIntVoid(&ppGenTmp, &err)
}
if err == nil {
err = libkb.CheckUIDAgainstUsername(s.uid, arg.Username)
s.ppGen = libkb.PassphraseGeneration(ppGenTmp)
}
return
}
// fetchLKS gets the encrypted LKS client half from the server.
// It uses encKey to decrypt it. It also returns the passphrase
// generation.
func fetchLKS(ctx *Context, g *libkb.GlobalContext, encKey libkb.GenericKey) (libkb.PassphraseGeneration, []byte, error) {
arg := libkb.APIArg{
Endpoint: "passphrase/recover",
NeedSession: true,
Args: libkb.HTTPArgs{
"kid": encKey.GetKID(),
},
}
if ctx.LoginContext != nil {
arg.SessionR = ctx.LoginContext.LocalSession()
}
res, err := g.API.Get(arg)
if err != nil {
return 0, nil, err
}
ctext, err := res.Body.AtKey("ctext").GetString()
if err != nil {
return 0, nil, err
}
ppGen, err := res.Body.AtKey("passphrase_generation").GetInt()
if err != nil {
return 0, nil, err
}
// Now try to decrypt with the unlocked device key
msg, _, err := encKey.DecryptFromString(ctext)
if err != nil {
return 0, nil, err
}
return libkb.PassphraseGeneration(ppGen), msg, nil
}
func (e *Kex2Provisionee) pushLKSServerHalf() error {
// make new lks
ppstream := libkb.NewPassphraseStream(e.pps.PassphraseStream)
ppstream.SetGeneration(libkb.PassphraseGeneration(e.pps.Generation))
e.lks = libkb.NewLKSec(ppstream, e.uid, e.G())
e.lks.GenerateServerHalf()
// make client half recovery
chrKID := e.dh.GetKID()
chrText, err := e.lks.EncryptClientHalfRecovery(e.dh)
if err != nil {
return err
}
err = libkb.PostDeviceLKS(e, e.device.ID, e.device.Type, e.lks.GetServerHalf(), e.lks.Generation(), chrText, chrKID)
if err != nil {
return err
}
// Sync the LKS stuff back from the server, so that subsequent
// attempts to use public key login will work.
err = e.ctx.LoginContext.RunSecretSyncer(e.uid)
if err != nil {
return err
}
// Cache the passphrase stream. Note that we don't have the triplesec
// portion of the stream cache, and that the only bytes in ppstream
// are the lksec portion (no pwhash, eddsa, dh). Currently passes
// all tests with this situation and code that uses those portions
// looks to be ok.
e.ctx.LoginContext.CreateStreamCache(nil, ppstream)
return nil
}
// fetchLKS gets the encrypted LKS client half from the server.
// It uses encKey to decrypt it. It also returns the passphrase
// generation.
func (c *PassphraseChange) fetchLKS(ctx *Context, encKey libkb.GenericKey) (libkb.PassphraseGeneration, []byte, error) {
res, err := c.G().API.Get(
libkb.APIArg{
Endpoint: "passphrase/recover",
NeedSession: true,
Args: libkb.HTTPArgs{
"kid": encKey.GetKID(),
},
})
if err != nil {
return 0, nil, err
}
ctext, err := res.Body.AtKey("ctext").GetString()
if err != nil {
return 0, nil, err
}
ppGen, err := res.Body.AtKey("passphrase_generation").GetInt()
if err != nil {
return 0, nil, err
}
// Now try to decrypt with the unlocked device key
msg, _, err := encKey.DecryptFromString(ctext)
if err != nil {
return 0, nil, err
}
return libkb.PassphraseGeneration(ppGen), msg, nil
}
func (e *PaperKeyGen) getClientHalfFromSecretStore() ([]byte, libkb.PassphraseGeneration, error) {
zeroGen := libkb.PassphraseGeneration(0)
secretStore := libkb.NewSecretStore(e.G(), e.arg.Me.GetNormalizedName())
if secretStore == nil {
return nil, zeroGen, errors.New("No secret store available")
}
secret, err := secretStore.RetrieveSecret()
if err != nil {
return nil, zeroGen, err
}
devid := e.G().Env.GetDeviceID()
if devid.IsNil() {
return nil, zeroGen, fmt.Errorf("no device id set")
}
var dev libkb.DeviceKey
aerr := e.G().LoginState().Account(func(a *libkb.Account) {
if err = libkb.RunSyncer(a.SecretSyncer(), e.arg.Me.GetUID(), a.LoggedIn(), a.LocalSession()); err != nil {
return
}
dev, err = a.SecretSyncer().FindDevice(devid)
}, "BackupKeygen.Run() -- retrieving passphrase generation)")
if aerr != nil {
return nil, zeroGen, aerr
}
if err != nil {
return nil, zeroGen, err
}
serverHalf, err := hex.DecodeString(dev.LksServerHalf)
if err != nil {
return nil, zeroGen, err
}
if len(secret) != len(serverHalf) {
return nil, zeroGen, fmt.Errorf("secret has length %d, server half has length %d", len(secret), len(serverHalf))
}
clientHalf := make([]byte, len(secret))
libkb.XORBytes(clientHalf, secret, serverHalf)
return clientHalf, dev.PPGen, nil
}
