def decrypt_masterkey_bytes(self, data, key=None):
"""
Decrypts Masterkeyfile bytes
data: bytearray of the masterkeyfile
key: bytes describing the key used for decryption
returns: touple of dictionaries. [0] - > masterkey[guid] = key, [1] - > backupkey[guid] = key
"""
mkf = MasterKeyFile.from_bytes(data)
mks = {}
bks = {}
if mkf.masterkey is not None:
for user_key in self.user_keys:
dec_key = mkf.masterkey.decrypt(user_key)
if dec_key:
self.masterkeys[mkf.guid] = dec_key
mks[mkf.guid] = dec_key
for machine_key in self.machine_keys:
dec_key = mkf.masterkey.decrypt(machine_key)
if dec_key:
self.masterkeys[mkf.guid] = dec_key
mks[mkf.guid] = dec_key
if key is not None:
dec_key = mkf.masterkey.decrypt(key)
if dec_key:
self.masterkeys[mkf.guid] = dec_key
mks[mkf.guid] = dec_key
if mkf.backupkey is not None:
for user_key in self.user_keys:
dec_key = mkf.backupkey.decrypt(user_key)
if dec_key:
self.backupkeys[mkf.guid] = dec_key
bks[mkf.guid] = dec_key
for machine_key in self.machine_keys:
dec_key = mkf.backupkey.decrypt(machine_key)
if dec_key:
self.backupkeys[mkf.guid] = dec_key
bks[mkf.guid] = dec_key
if key is not None:
dec_key = mkf.backupkey.decrypt(key)
if dec_key:
self.masterkeys[mkf.guid] = dec_key
bks[mkf.guid] = dec_key
return mks, bks
def decrypt_masterkey_bytes(self, data, key=None):
"""
Decrypts Masterkeyfile bytes
data: bytearray of the masterkeyfile
key: bytes describing the key used for decryption
returns: touple of dictionaries. [0] - > masterkey[guid] = key, [1] - > backupkey[guid] = key
"""
mkf = MasterKeyFile.from_bytes(data)
mks = {}
bks = {}
if mkf.masterkey is not None:
if mkf.guid in self.masterkeys:
mks[mkf.guid] = self.masterkeys[mkf.guid]
else:
for user_key in self.prekeys:
dec_key = mkf.masterkey.decrypt(user_key)
if dec_key:
logger.debug('user key win: %s' % user_key.hex())
self.masterkeys[mkf.guid] = dec_key
mks[mkf.guid] = dec_key
break
if key is not None:
dec_key = mkf.masterkey.decrypt(key)
if dec_key:
self.masterkeys[mkf.guid] = dec_key
mks[mkf.guid] = dec_key
if mkf.backupkey is not None:
if mkf.guid in self.masterkeys:
mks[mkf.guid] = self.masterkeys[mkf.guid]
else:
for user_key in self.prekeys:
dec_key = mkf.backupkey.decrypt(user_key)
if dec_key:
self.backupkeys[mkf.guid] = dec_key
bks[mkf.guid] = dec_key
break
if key is not None:
dec_key = mkf.backupkey.decrypt(key)
if dec_key:
self.masterkeys[mkf.guid] = dec_key
bks[mkf.guid] = dec_key
return mks, bks