Onionr/onionr/keymanager.py

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Python
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2018-12-09 17:29:39 +00:00
'''
Onionr - P2P Anonymous Storage Network
Load, save, and delete the user's public key pairs (does not handle peer keys)
'''
'''
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
'''
import onionrcrypto
class KeyManager:
def __init__(self, crypto):
assert isinstance(crypto, onionrcrypto.OnionrCrypto)
self._core = crypto._core
self._utils = self._core._utils
self.keyFile = crypto._keyFile
self.crypto = crypto
def addKey(self, pubKey=None, privKey=None):
if type(pubKey) is type(None) and type(privKey) is type(None):
pubKey, privKey = self.crypto.generatePubKey()
pubKey = self.crypto._core._utils.bytesToStr(pubKey)
privKey = self.crypto._core._utils.bytesToStr(privKey)
try:
if pubKey in self.getPubkeyList():
raise ValueError('Pubkey already in list: %s' % (pubKey,))
except FileNotFoundError:
pass
with open(self.keyFile, "a") as keyFile:
keyFile.write(pubKey + ',' + privKey + '\n')
return (pubKey, privKey)
def removeKey(self, pubKey):
'''Remove a key pair by pubkey'''
keyList = self.getPubkeyList()
keyData = ''
try:
keyList.remove(pubKey)
except ValueError:
return False
else:
keyData = ','.join(keyList)
with open(self.keyFile, "w") as keyFile:
keyFile.write(keyData)
def getPubkeyList(self):
'''Return a list of the user's keys'''
keyList = []
with open(self.keyFile, "r") as keyFile:
keyData = keyFile.read()
keyData = keyData.split('\n')
for pair in keyData:
if len(pair) > 0: keyList.append(pair.split(',')[0])
return keyList
def getPrivkey(self, pubKey):
privKey = None
with open(self.keyFile, "r") as keyFile:
keyData = keyFile.read()
for pair in keyData.split('\n'):
if pubKey in pair:
privKey = pair.split(',')[1]
return privKey
def changeActiveKey(self, pubKey):
'''Change crypto.pubKey and crypto.privKey to a given key pair by specifying the public key'''
if not pubKey in self.getPubkeyList():
raise ValueError('That pubkey does not exist')
self.crypto.pubKey = pubKey
self.crypto.privKey = self.getPrivkey(pubKey)