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Code Issues Releases Wiki Activity

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

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This commit is contained in:
Pavol Rusnak 2019-05-13 15:34:23 +02:00
parent 9f36c73a78
commit f1c34701b8
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GPG Key ID: 91F3B339B9A02A3D
1 changed files with 7 additions and 5 deletions
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12
core/src/apps/common/cache.py
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@ -4,6 +4,7 @@ from apps.common import storage
_cached_seed = None
_cached_passphrase = None
_cached_passphrase_fprint = None
def get_state(prev_state: bytes = None, passphrase: str = None) -> bytes:
@ -36,6 +37,10 @@ def get_passphrase():
return _cached_passphrase
def get_passphrase_fprint():
return _cached_passphrase_fprint or ""
def has_passphrase():
return _cached_passphrase is not None
@ -46,8 +51,9 @@ def set_seed(seed):
def set_passphrase(passphrase):
global _cached_passphrase
global _cached_passphrase, _cached_passphrase_fprint
_cached_passphrase = passphrase
_cached_passphrase_fprint = _compute_state(b"FPRINT", passphrase)[:4]
def clear(skip_passphrase: bool = False):
@ -56,7 +62,3 @@ def clear(skip_passphrase: bool = False):
set_passphrase("")
else:
set_passphrase(None)
def get_passphrase_fprint():
return _compute_state(b"", get_passphrase() or "")[:4]