Onionr/onionr/onionrcrypto.py

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'''
Onionr - P2P Microblogging Platform & Social network
This file handles Onionr's cryptography.
'''
'''
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 nacl.signing, nacl.encoding, nacl.public, os
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class OnionrCrypto:
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def __init__(self, coreInstance):
self._core = coreInstance
self._keyFile = 'data/keys.txt'
self.pubKey = None
self.privKey = None
# Load our own pub/priv Ed25519 keys, gen & save them if they don't exist
if os.path.exists(self._keyFile):
with open('data/keys.txt', 'r') as keys:
keys = keys.read().split(',')
self.pubKey = keys[0]
self.privKey = keys[1]
else:
keys = self.generatePubKey()
self.pubKey = keys[0]
self.privKey = keys[1]
with open(self._keyFile, 'w') as keyfile:
keyfile.write(self.pubKey + ',' + self.privKey)
return
def edVerify(self, data, key):
'''Verify signed data (combined in nacl) to an ed25519 key'''
key = nacl.signing.VerifyKey(key=key, encoder=nacl.encoding.Base32Encoder)
retData = ''
if encodeResult:
retData = key.verify(data.encode(), encoder=nacl.encoding.Base64Encoder) # .encode() is not the same as nacl.encoding
else:
retData = key.verify(data.encode())
return retData
def edSign(self, data, key, encodeResult=False):
'''Ed25519 sign data'''
key = nacl.signing.SigningKey(seed=key, encoder=nacl.encoding.Base32Encoder)
retData = ''
if encodeResult:
retData = key.sign(data.encode(), encoder=nacl.encoding.Base64Encoder) # .encode() is not the same as nacl.encoding
else:
retData = key.sign(data.encode())
return retData
def pubKeyEncrypt(self, data, peer):
'''Encrypt to a peers public key (Curve25519, taken from Ed25519 pubkey)'''
return
def pubKeyEncrypt(self, data, peer):
'''pubkey decrypt (Curve25519, taken from Ed25519 pubkey)'''
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return
def symmetricPeerEncrypt(self, data):
'''Salsa20 encrypt data to peer (with mac)'''
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return
def symmetricPeerDecrypt(self, data, peer):
'''Salsa20 decrypt data from peer (with mac)'''
return
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def generateSymmetric(self, data, peer):
'''Generate symmetric key'''
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return
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def generatePubKey(self):
'''Generate a Ed25519 public key pair, return tuple of base64encoded pubkey, privkey'''
private_key = nacl.signing.SigningKey.generate()
public_key = private_key.verify_key.encode(encoder=nacl.encoding.Base32Encoder())
return (public_key.decode(), private_key.encode(encoder=nacl.encoding.Base32Encoder()).decode())