arno/trezor-firmware
1
0
Fork 0
mirror of https://github.com/trezor/trezor-firmware.git synced 2025-01-15 01:40:57 +00:00
Code Issues Releases Wiki Activity

core/cache: cache passphrase_fingerprint, compute it only on change

Browse Source
This commit is contained in:
Pavol Rusnak 2019-05-13 15:34:23 +02:00
parent 9f36c73a78
commit f1c34701b8
No known key found for this signature in database
GPG Key ID: 91F3B339B9A02A3D
1 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
core/src/apps/common/cache.py
View File

@ -4,6 +4,7 @@ from apps.common import storage
_cached_seed = None _cached_seed = None
_cached_passphrase = None _cached_passphrase = None
_cached_passphrase_fprint = None
def get_state(prev_state: bytes = None, passphrase: str = None) -> bytes: def get_state(prev_state: bytes = None, passphrase: str = None) -> bytes:
@ -36,6 +37,10 @@ def get_passphrase():
return _cached_passphrase return _cached_passphrase
def get_passphrase_fprint():
return _cached_passphrase_fprint or ""
def has_passphrase(): def has_passphrase():
return _cached_passphrase is not None return _cached_passphrase is not None
@ -46,8 +51,9 @@ def set_seed(seed):
def set_passphrase(passphrase): def set_passphrase(passphrase):
global _cached_passphrase global _cached_passphrase, _cached_passphrase_fprint
_cached_passphrase = passphrase _cached_passphrase = passphrase
_cached_passphrase_fprint = _compute_state(b"FPRINT", passphrase)[:4]
def clear(skip_passphrase: bool = False): def clear(skip_passphrase: bool = False):
@ -56,7 +62,3 @@ def clear(skip_passphrase: bool = False):
set_passphrase("") set_passphrase("")
else: else:
set_passphrase(None) set_passphrase(None)
def get_passphrase_fprint():
return _compute_state(b"", get_passphrase() or "")[:4]