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replace base asserts with UsageError

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This commit is contained in:
Brian Warner 2015-07-24 15:55:42 -07:00
parent 056cf107fc
commit cfe51f73c1
2 changed files with 12 additions and 10 deletions
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12
src/wormhole/blocking/transcribe.py
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@ -47,7 +47,7 @@ class Wormhole:
def __init__(self, appid, relay):
self.appid = appid
self.relay = relay
assert self.relay.endswith("/")
if not self.relay.endswith("/"): raise UsageError
self.started = time.time()
self.wait = 0.5*SECOND
self.timeout = 3*MINUTE
@ -123,7 +123,7 @@ class Wormhole:
return channel_id
def derive_key(self, purpose, length=SecretBox.KEY_SIZE):
assert type(purpose) == type(b"")
if type(purpose) is not type(b""): raise UsageError
return HKDF(self.key, length, CTXinfo=purpose)
@ -186,8 +186,8 @@ class Wormhole:
return self.verifier
def get_data(self, outbound_data):
assert self.code is not None
assert self.channel_id is not None
if self.code is None: raise UsageError
if self.channel_id is None: raise UsageError
self._get_key()
# Without predefined roles, we can't derive predictably unique keys
@ -211,13 +211,13 @@ class Wormhole:
return inbound_data
def _encrypt_data(self, key, data):
assert len(key) == SecretBox.KEY_SIZE
if len(key) != SecretBox.KEY_SIZE: raise UsageError
box = SecretBox(key)
nonce = utils.random(SecretBox.NONCE_SIZE)
return box.encrypt(data, nonce)
def _decrypt_data(self, key, encrypted):
assert len(key) == SecretBox.KEY_SIZE
if len(key) != SecretBox.KEY_SIZE: raise UsageError
box = SecretBox(key)
data = box.decrypt(encrypted)
return data

10
src/wormhole/twisted/transcribe.py
View File

@ -196,18 +196,20 @@ class SymmetricWormhole:
return d
def derive_key(self, purpose, length=SecretBox.KEY_SIZE):
assert self.key is not None # call after get_verifier() or get_data()
assert type(purpose) == type(b"")
if self.key is None:
# call after get_verifier() or get_data()
raise UsageError
if type(purpose) is not type(b""): raise UsageError
return HKDF(self.key, length, CTXinfo=purpose)
def _encrypt_data(self, key, data):
assert len(key) == SecretBox.KEY_SIZE
if len(key) != SecretBox.KEY_SIZE: raise UsageError
box = SecretBox(key)
nonce = utils.random(SecretBox.NONCE_SIZE)
return box.encrypt(data, nonce)
def _decrypt_data(self, key, encrypted):
assert len(key) == SecretBox.KEY_SIZE
if len(key) != SecretBox.KEY_SIZE: raise UsageError
box = SecretBox(key)
data = box.decrypt(encrypted)
return data