func (k *KeybaseDaemonRPC) filterKeys(ctx context.Context, uid keybase1.UID, keys []keybase1.PublicKey) ([]VerifyingKey, []CryptPublicKey, error) {
var verifyingKeys []VerifyingKey
var cryptPublicKeys []CryptPublicKey
for _, publicKey := range keys {
if len(publicKey.PGPFingerprint) > 0 {
continue
}
// Import the KID to validate it.
key, err := libkb.ImportKeypairFromKID(publicKey.KID)
if err != nil {
return nil, nil, err
}
if publicKey.IsSibkey {
k.log.CDebugf(
ctx, "got verifying key %s for user %s",
key.VerboseDescription(), uid)
verifyingKeys = append(
verifyingKeys, MakeVerifyingKey(key.GetKID()))
} else {
k.log.CDebugf(
ctx, "got crypt public key %s for user %s",
key.VerboseDescription(), uid)
cryptPublicKeys = append(
cryptPublicKeys, MakeCryptPublicKey(key.GetKID()))
}
}
return verifyingKeys, cryptPublicKeys, nil
}
// checkReverseSig verifies that the reverse sig in jw is valid
// and matches jw.
func (e *Kex2Provisioner) checkReverseSig(jw *jsonw.Wrapper) error {
kid, err := jw.AtPath("body.sibkey.kid").GetString()
if err != nil {
return err
}
keypair, err := libkb.ImportKeypairFromKID(keybase1.KIDFromString(kid))
if err != nil {
return err
}
revsig, err := jw.AtPath("body.sibkey.reverse_sig").GetString()
if err != nil {
return err
}
// set reverse_sig to nil to verify it:
jw.SetValueAtPath("body.sibkey.reverse_sig", jsonw.NewNil())
msg, err := jw.Marshal()
if err != nil {
return err
}
_, err = keypair.VerifyString(revsig, msg)
if err != nil {
return err
}
// put reverse_sig back in
jw.SetValueAtPath("body.sibkey.reverse_sig", jsonw.NewString(revsig))
return nil
}
// EncryptTLFCryptKeyClientHalf implements the Crypto interface for
// CryptoCommon.
func (c *CryptoCommon) EncryptTLFCryptKeyClientHalf(privateKey TLFEphemeralPrivateKey, publicKey CryptPublicKey, clientHalf TLFCryptKeyClientHalf) (encryptedClientHalf EncryptedTLFCryptKeyClientHalf, err error) {
var nonce [24]byte
err = cryptoRandRead(nonce[:])
if err != nil {
return
}
keypair, err := libkb.ImportKeypairFromKID(publicKey.kid)
if err != nil {
return
}
dhKeyPair, ok := keypair.(libkb.NaclDHKeyPair)
if !ok {
err = libkb.KeyCannotEncryptError{}
return
}
encryptedData := box.Seal(nil, clientHalf.data[:], &nonce, (*[32]byte)(&dhKeyPair.Public), (*[32]byte)(&privateKey.data))
encryptedClientHalf = EncryptedTLFCryptKeyClientHalf{
Version: EncryptionSecretbox,
Nonce: nonce[:],
EncryptedData: encryptedData,
}
return
}
// CurrentSession implements the KeybaseDaemon interface for KeybaseDaemonRPC.
func (k *KeybaseDaemonRPC) CurrentSession(ctx context.Context, sessionID int) (
SessionInfo, error) {
cachedCurrentSession := k.getCachedCurrentSession()
if cachedCurrentSession != (SessionInfo{}) {
return cachedCurrentSession, nil
}
res, err := k.sessionClient.CurrentSession(ctx, sessionID)
if err != nil {
if ncs := (NoCurrentSessionError{}); err.Error() ==
NoCurrentSessionExpectedError {
// Use an error with a proper OS error code attached to
// it. TODO: move ErrNoSession from client/go/service to
// client/go/libkb, so we can use types for the check
// above.
err = ncs
}
return SessionInfo{}, err
}
// Import the KIDs to validate them.
deviceSubkey, err := libkb.ImportKeypairFromKID(res.DeviceSubkeyKid)
if err != nil {
return SessionInfo{}, err
}
deviceSibkey, err := libkb.ImportKeypairFromKID(res.DeviceSibkeyKid)
if err != nil {
return SessionInfo{}, err
}
cryptPublicKey := MakeCryptPublicKey(deviceSubkey.GetKID())
verifyingKey := MakeVerifyingKey(deviceSibkey.GetKID())
s := SessionInfo{
Name: libkb.NewNormalizedUsername(res.Username),
UID: keybase1.UID(res.Uid),
Token: res.Token,
CryptPublicKey: cryptPublicKey,
VerifyingKey: verifyingKey,
}
k.log.CDebugf(
ctx, "new session with username %s, uid %s, crypt public key %s, and verifying key %s",
s.Name, s.UID, s.CryptPublicKey, s.VerifyingKey)
k.setCachedCurrentSession(s)
return s, nil
}
// Test that decrypting an TLF crypt key client half encrypted with
// box.Seal works.
func TestCryptoClientDecryptTLFCryptKeyClientHalfBoxSeal(t *testing.T) {
signingKey := MakeFakeSigningKeyOrBust("client sign")
cryptPrivateKey := MakeFakeCryptPrivateKeyOrBust("client crypt private")
config := testCryptoClientConfig(t)
fc := NewFakeCryptoClient(config, signingKey, cryptPrivateKey, nil, nil)
c := newCryptoClientWithClient(config, fc)
_, _, ephPublicKey, ephPrivateKey, cryptKey, err := c.MakeRandomTLFKeys()
if err != nil {
t.Fatal(err)
}
serverHalf, err := c.MakeRandomTLFCryptKeyServerHalf()
if err != nil {
t.Fatal(err)
}
clientHalf, err := c.MaskTLFCryptKey(serverHalf, cryptKey)
if err != nil {
t.Fatal(err)
}
var nonce [24]byte
err = cryptoRandRead(nonce[:])
if err != nil {
t.Fatal(err)
}
keypair, err := libkb.ImportKeypairFromKID(cryptPrivateKey.getPublicKey().kid)
if err != nil {
t.Fatal(err)
}
dhKeyPair, ok := keypair.(libkb.NaclDHKeyPair)
if !ok {
t.Fatal(libkb.KeyCannotEncryptError{})
}
encryptedData := box.Seal(nil, clientHalf.data[:], &nonce, (*[32]byte)(&dhKeyPair.Public), (*[32]byte)(&ephPrivateKey.data))
encryptedClientHalf := EncryptedTLFCryptKeyClientHalf{
Version: EncryptionSecretbox,
Nonce: nonce[:],
EncryptedData: encryptedData,
}
decryptedClientHalf, err := c.DecryptTLFCryptKeyClientHalf(
context.Background(), ephPublicKey, encryptedClientHalf)
if err != nil {
t.Fatal(err)
}
if clientHalf != decryptedClientHalf {
t.Error("clientHalf != decryptedClientHalf")
}
}
// CurrentSession implements the KeybaseDaemon interface for KeybaseDaemonRPC.
func (k *KeybaseDaemonRPC) CurrentSession(ctx context.Context, sessionID int) (
SessionInfo, error) {
cachedCurrentSession := k.getCachedCurrentSession()
if cachedCurrentSession != (SessionInfo{}) {
return cachedCurrentSession, nil
}
res, err := k.sessionClient.CurrentSession(ctx, sessionID)
if err != nil {
if ncs := (NoCurrentSessionError{}); err.Error() == ncs.Error() {
// Use an error with a proper OS error code attached to it.
err = ncs
}
return SessionInfo{}, err
}
// Import the KIDs to validate them.
deviceSubkey, err := libkb.ImportKeypairFromKID(res.DeviceSubkeyKid)
if err != nil {
return SessionInfo{}, err
}
deviceSibkey, err := libkb.ImportKeypairFromKID(res.DeviceSibkeyKid)
if err != nil {
return SessionInfo{}, err
}
cryptPublicKey := MakeCryptPublicKey(deviceSubkey.GetKID())
verifyingKey := MakeVerifyingKey(deviceSibkey.GetKID())
s := SessionInfo{
UID: keybase1.UID(res.Uid),
Token: res.Token,
CryptPublicKey: cryptPublicKey,
VerifyingKey: verifyingKey,
}
k.log.CDebugf(
ctx, "new session with uid %s, crypt public key %s, and verifying key %s",
s.UID, s.CryptPublicKey, s.VerifyingKey)
k.setCachedCurrentSession(s)
return s, nil
}
// processKey adds the given public key to the appropriate verifying
// or crypt list (as return values), and also updates the given name
// map in place.
func processKey(publicKey keybase1.PublicKey,
addVerifyingKey addVerifyingKeyFunc,
addCryptPublicKey addCryptPublicKeyFunc,
kidNames map[keybase1.KID]string) error {
if len(publicKey.PGPFingerprint) > 0 {
return nil
}
// Import the KID to validate it.
key, err := libkb.ImportKeypairFromKID(publicKey.KID)
if err != nil {
return err
}
if publicKey.IsSibkey {
addVerifyingKey(MakeVerifyingKey(key.GetKID()))
} else {
addCryptPublicKey(MakeCryptPublicKey(key.GetKID()))
}
if publicKey.DeviceDescription != "" {
kidNames[publicKey.KID] = publicKey.DeviceDescription
}
return nil
}
// Run starts the engine.
func (e *SaltpackEncrypt) Run(ctx *Context) (err error) {
e.G().Log.Debug("+ SaltpackEncrypt::Run")
defer func() {
e.G().Log.Debug("- SaltpackEncrypt::Run -> %v", err)
}()
var receivers []libkb.NaclDHKeyPublic
var sender libkb.NaclDHKeyPair
if err = e.loadMe(ctx); err != nil {
return err
}
if !e.arg.Opts.NoSelfEncrypt && e.me != nil {
receivers, err = e.loadMyPublicKeys()
if err != nil {
return err
}
}
kfarg := DeviceKeyfinderArg{
Users: e.arg.Opts.Recipients,
NeedEncryptKeys: true,
Self: e.me,
}
kf := NewDeviceKeyfinder(e.G(), kfarg)
if err := RunEngine(kf, ctx); err != nil {
return err
}
uplus := kf.UsersPlusKeys()
for _, up := range uplus {
for _, k := range up.DeviceKeys {
gk, err := libkb.ImportKeypairFromKID(k.KID)
if err != nil {
return err
}
kp, ok := gk.(libkb.NaclDHKeyPair)
if !ok {
return libkb.KeyCannotEncryptError{}
}
receivers = append(receivers, kp.Public)
}
}
if !e.arg.Opts.HideSelf && e.me != nil {
ska := libkb.SecretKeyArg{
Me: e.me,
KeyType: libkb.DeviceEncryptionKeyType,
}
key, err := e.G().Keyrings.GetSecretKeyWithPrompt(ctx.SecretKeyPromptArg(ska, "encrypting a message/file"))
if err != nil {
return err
}
kp, ok := key.(libkb.NaclDHKeyPair)
if !ok || kp.Private == nil {
return libkb.KeyCannotDecryptError{}
}
sender = kp
}
encarg := libkb.SaltpackEncryptArg{
Source: e.arg.Source,
Sink: e.arg.Sink,
Receivers: receivers,
Sender: sender,
Binary: e.arg.Opts.Binary,
HideRecipients: e.arg.Opts.HideRecipients,
}
return libkb.SaltpackEncrypt(e.G(), &encarg)
}
func (k *KexProvisioner) handlePleaseSign(ctx *Context, m *kex.Msg) error {
eddsa := m.Args().SigningKey
sig := m.Args().Sig
keypair := libkb.NaclSigningKeyPair{Public: eddsa}
sigPayload, _, err := keypair.VerifyStringAndExtract(sig)
if err != nil {
return err
}
k.G().Log.Debug("Got PleaseSign() on verified JSON blob %s\n", string(sigPayload))
// k.deviceSibkey is public only
if k.sigKey == nil {
var err error
arg := libkb.SecretKeyArg{
Me: k.user,
KeyType: libkb.DeviceSigningKeyType,
}
k.sigKey, err = k.G().Keyrings.GetSecretKeyWithPrompt(nil, arg, k.engctx.SecretUI, "new device install")
if err != nil {
return err
}
}
jw, err := jsonw.Unmarshal(sigPayload)
if err != nil {
return err
}
var newKID keybase1.KID
var newKey libkb.GenericKey
if newKID, err = libkb.GetKID(jw.AtPath("body.sibkey.kid")); err != nil {
return err
}
if newKey, err = libkb.ImportKeypairFromKID(newKID); err != nil {
return err
}
if err = k.verifyPleaseSign(jw, newKID); err != nil {
return err
}
if err = jw.SetValueAtPath("body.sibkey.reverse_sig", jsonw.NewString(sig)); err != nil {
return err
}
del := libkb.Delegator{
NewKey: newKey,
ExistingKey: k.sigKey,
Me: k.user,
Expire: libkb.NaclEdDSAExpireIn,
DelegationType: libkb.SibkeyType,
EldestKID: k.user.GetEldestKID(),
Contextified: libkb.NewContextified(k.G()),
}
if err = del.CheckArgs(); err != nil {
return err
}
if err = del.SignAndPost(ctx.LoginContext, jw); err != nil {
return err
}
return nil
}
func (k *KexNewDevice) handleHello(ctx *Context, m *kex.Msg) (err error) {
k.xDevKey, err = libkb.ImportKeypairFromKID(m.Args().DevKeyID)
return
}
