Basic framework finished

[securemail.git] / user.py

diff --git a/user.py b/user.py
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+++ b/user.py
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+# -*- coding: utf-8 -*-
+ 
+# Copyright (c) 2018  Michael Rasmussen <mir@datanom.net>
+ 
+# This file is part of SecureMail.
+
+# SecureMail 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.
+#
+# SecureMail 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 SecureMail.  If not, see <https://www.gnu.org/licenses/>.
+
+try:
+    import cPickle as pickle
+except:
+    import pickle
+from db import DBInterface as DBI
+from cryptonize import Cryptonize
+
+class NoSuchUserException(Exception):
+    pass
+
+class User:
+    """
+    Class implementing the backend users
+    """
+    def __init__(self, key=None):
+        if key is not None:
+            self.load(key)
+
+    def store(self, key):
+        crypto = Cryptonize()
+        cipher = crypto.symmetric_encrypt(key, pickle.dumps(self.__dict__))
+        DBI.store_user(crypto.generate_hash(key), cipher)
+
+    def load(self, key):
+        crypto = Cryptonize()
+        cipher = DBI.load_user(crypto.generate_hash(key))
+        if cipher is None:
+            raise NoSuchUserException('{0}: User not found'.format(key))
+        plain = crypto.symmetric_decrypt(key, cipher)
+        try:
+            obj = pickle.loads(plain)
+            self.__dict__.update(obj)
+        except pickle.UnpicklingError as e:
+            raise NoSuchUserException(e)
+            
+    @property
+    def name(self):
+        return self._name
+
+    @name.setter
+    def name(self, name):
+        self._name = name
+
+    @property
+    def email(self):
+        return self.email
+
+    @email.setter
+    def email(self, email):
+        self._email = email
+
+
+if __name__ == '__main__':
+    try:
+        u = User('test')
+        for attr, value in u.__dict__.items():
+            print ('{0}: {1}'.format(attr, value))
+        c = Cryptonize()
+        key = 'æselØre' #c.get_random_key()
+        cipher = c.symmetric_encrypt(key, pickle.dumps(u))
+        obj = pickle.loads(c.symmetric_decrypt(key, cipher))
+        for attr, value in obj.__dict__.items():
+            print ('{0}: {1}'.format(attr, value))
+    except NoSuchUserException:
+        u = User()
+        u.name = 'testname'
+        u.email = 'testname@securemail.icu'
+        u.store('test')
+    except Exception as e:
+        print (e)