def authTokenValidation(self, **kwargs):
"""Server Side LogIn Validation
Receives a token signed by the user and validate it
Security: Message from user ciphered with Server Public Key
Session Management: Create a Session Key with DiffieHellman
"""
message = ast.literal_eval(kwargs['message'])
tokenSigned = ast.literal_eval(kwargs['token'])
# Decipher the Message with Server Private Key
receivedData = dm.decryptMessageReceived(message['data'].decode('hex'))
receivedToken = dm.decryptMessageReceived(
tokenSigned['data'].decode('hex'))
""" ----------------- PAM -------------------- """
user = receivedData['userID']
auth = False
path = DBmodule.getPubKeyPath()
myPam = pam.pam_module(user)
token = um.getUserToken(user).encode('base64')
signed = receivedToken['token']
if DBmodule.db_getLogIn(receivedData['userID'],
receivedData['password']) == 1:
match = "Gambiarra"
else:
match = "Menos Gambiarra"
myPam.setItems(path, token, signed, match)
try:
myPam.auth.authenticate()
except PAM.error, resp:
print 'Go away! (%s)' % resp
def logInUser(self, **kwargs):
"""Server Side logIn User
User sends his username (Unique Identifier) and his password
Security: Message from user ciphered with Server Public Key
Session Management: Create a Public Key with DiffieHellman"""
# Decipher the Message with Server Private Key
receivedData = dm.decryptMessageReceived(kwargs['data'].decode('hex'))
print receivedData['userID']
# Verify if the user exists and has finished the regist process
if DBmodule.db_registAuthenticate(receivedData['userID']) and \
DBmodule.db_getLogIn(receivedData['userID'], receivedData['password']) == 1:
# Create Session
print receivedData['userID']
print receivedData['password']
serverSession = DiffieHellman.DiffieHellman()
# Create challenge
token = os.urandom(20)
um.addSession(receivedData['userID'], serverSession, token)
# Send to client the Token and the session public key
tf = tempfile.NamedTemporaryFile(delete=True)
pub_key = DBmodule.db_getUserPubKey(
DBmodule.db_getUserID(receivedData['userID'])).decode('hex')
security.encrypt_RSA(security.importkey_RSA(pub_key), token, tf)
messageToSend = {
'token': tf.read().encode('hex'),
'session': serverSession.publicKey
}
return json.dumps(messageToSend)
elif DBmodule.db_registNotAuthenticate(receivedData['userID']):
return "REGIST_AGAIN"
else:
return "ERROR"
