Exemplo n.º 1
0
func StretchPassphrase(passphrase string, salt []byte) (tsec *triplesec.Cipher, pps *PassphraseStream, err error) {
	if salt == nil {
		err = fmt.Errorf("no salt provided to StretchPassphrase")
		return
	}
	var tmp []byte
	if tsec, err = triplesec.NewCipher([]byte(passphrase), salt); err != nil {
		return
	}
	if _, tmp, err = tsec.DeriveKey(extraLen); err != nil {
		return
	}
	pps = NewPassphraseStream(tmp)
	return
}
Exemplo n.º 2
0
func (s *SKB) UnlockSecretKey(lctx LoginContext, passphrase string, tsec *triplesec.Cipher, pps *PassphraseStream, secretStorer SecretStorer, lksPreload *LKSec) (key GenericKey, err error) {
	if key = s.decryptedSecret; key != nil {
		return
	}
	var unlocked []byte

	switch s.Priv.Encryption {
	case 0:
		unlocked = s.Priv.Data
	case int(triplesec.Version):
		if tsec == nil {
			tsec, err = triplesec.NewCipher([]byte(passphrase), nil)
			if err != nil {
				return nil, err
			}
		}
		unlocked, err = s.tsecUnlock(tsec)
	case LKSecVersion:
		ppsIn := pps
		if pps == nil {
			tsec, pps, err = s.unverifiedPassphraseStream(lctx, passphrase)
			if err != nil {
				return nil, fmt.Errorf("UnlockSecretKey: %s", err)
			}
		}
		if unlocked, err = s.lksUnlock(lctx, pps, secretStorer, lksPreload); err == nil && ppsIn == nil {
			// the unverified tsec, pps has been verified, so cache it:
			if lctx != nil {
				lctx.CreateStreamCache(tsec, pps)
			} else {
				aerr := s.G().LoginState().Account(func(a *Account) {
					a.CreateStreamCache(tsec, pps)
				}, "skb - UnlockSecretKey - CreateStreamCache")
				if aerr != nil {
					return nil, aerr
				}
			}
		} else {
			s.G().Log.Debug("| not caching passphrase stream: err = %v", err)
		}
	default:
		err = BadKeyError{fmt.Sprintf("Can't unlock secret with protection type %d", int(s.Priv.Encryption))}
	}
	if err == nil {
		key, err = s.parseUnlocked(unlocked)
	}
	return
}
Exemplo n.º 3
0
func NewSecureTriplesec(passphrase []byte, salt []byte) (Triplesec, error) {
	return triplesec.NewCipher(passphrase, salt)
}