From 5cdbb0aaa7bf51a799ebd6e67c53937d4af18981 Mon Sep 17 00:00:00 2001
From: Mauricio Baeza <public@elmau.net>
Date: Sun, 3 Feb 2019 23:32:48 -0600
Subject: [PATCH] Agregar funciones para encriptar

---
 source/app/controllers/util.py  |  3 --
 source/app/controllers/utils.py | 50 +++++++++++++++++++++++++++++++++
 source/app/models/main.py       |  6 +++-
 source/app/settings.py          |  2 +-
 4 files changed, 56 insertions(+), 5 deletions(-)
 create mode 100644 source/app/controllers/utils.py

diff --git a/source/app/controllers/util.py b/source/app/controllers/util.py
index 32c9768..3202ac7 100644
--- a/source/app/controllers/util.py
+++ b/source/app/controllers/util.py
@@ -23,7 +23,6 @@ import hashlib
 import io
 import json
 import locale
-import math
 import mimetypes
 import os
 import re
@@ -3766,6 +3765,4 @@ def parse_xml2(xml_str):
     return etree.fromstring(xml_str.encode('utf-8'))
 
 
-def round_up(value):
-    return int(math.ceil(value))
 
diff --git a/source/app/controllers/utils.py b/source/app/controllers/utils.py
new file mode 100644
index 0000000..8f46c9f
--- /dev/null
+++ b/source/app/controllers/utils.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+
+# ~ Empresa Libre
+# ~ Copyright (C) 2016-2019  Mauricio Baeza Servin (public@elmau.net)
+# ~
+# ~ 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 <http://www.gnu.org/licenses/>.
+
+import base64
+import math
+import os
+
+from cryptography.fernet import Fernet
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
+
+
+def round_up(value):
+    return int(math.ceil(value))
+
+
+def _get_key(password):
+    salt = os.urandom(16)
+    kdf = PBKDF2HMAC(algorithm=hashes.SHA256(), length=32, salt=salt,
+        iterations=100000, backend=default_backend())
+    key = base64.urlsafe_b64encode(kdf.derive(password.encode()))
+    return key
+
+
+def encrypt(data, password)
+    f = Fernet(_get_key(password))
+    return f.encrypt(data.encode()).decode()
+
+
+def decrypt(data, password)
+    f = Fernet(_get_key(password))
+    return f.decrypt(data.encode()).decode()
+
+
diff --git a/source/app/models/main.py b/source/app/models/main.py
index afcbcda..f8eb164 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -29,8 +29,12 @@ if __name__ == '__main__':
     parent_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
     sys.path.insert(0, parent_dir)
 
+# ~ v2
+from controllers import utils
 
+# ~ v1
 from controllers import util
+
 from settings import log, DEBUG, VERSION, PATH_CP, COMPANIES, PRE, CURRENT_CFDI, \
     INIT_VALUES, DEFAULT_PASSWORD, DECIMALES, IMPUESTOS, DEFAULT_SAT_PRODUCTO, \
     CANCEL_SIGNATURE, PUBLIC, DEFAULT_SERIE_TICKET, CURRENT_CFDI_NOMINA, \
@@ -4336,7 +4340,7 @@ class Facturas(BaseModel):
             importe = round(cantidad * precio_final, DECIMALES)
 
             if use_packing:
-                product['empaques'] = util.round_up(
+                product['empaques'] = utils.round_up(
                     cantidad / float(p.cantidad_empaque))
 
             product['cantidad'] = cantidad
diff --git a/source/app/settings.py b/source/app/settings.py
index 5449698..74da420 100644
--- a/source/app/settings.py
+++ b/source/app/settings.py
@@ -48,7 +48,7 @@ except ImportError:
 
 DEBUG = DEBUG
 VERSION = '1.28.0'
-EMAIL_SUPPORT = ('soporte@empresalibre.net',)
+EMAIL_SUPPORT = ('soporte@empresalibre.mx',)
 TITLE_APP = '{} v{}'.format(TITLE_APP, VERSION)
 
 BASE_DIR = os.path.abspath(os.path.dirname(__file__))