med/users/models.py

364 lines
11 KiB
Python

# Re2o est un logiciel d'administration développé initiallement au rezometz. Il
# se veut agnostique au réseau considéré, de manière à être installable en
# quelques clics.
#
# Copyright © 2017 Gabriel Détraz
# Copyright © 2017 Goulven Kermarec
# Copyright © 2017 Augustin Lemesle
#
# 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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
from django.db import models
from django.db.models import Q
from django.forms import ModelForm, Form
from django import forms
from django.db.models.signals import post_save, post_delete
from django.dispatch import receiver
from django.utils.functional import cached_property
from macaddress.fields import MACAddressField
from portail_captif.settings import GENERIC_IPSET_COMMAND, IPSET_NAME, REQ_EXPIRE_HRS,FORBIDEN_INTERFACES, SERVER_SELF_IP, AUTORIZED_INTERFACES, PORTAIL_ACTIVE
import re, uuid
import datetime
from django.utils import timezone
from django.contrib.auth.models import AbstractBaseUser, BaseUserManager
import subprocess
def apply(cmd):
return subprocess.Popen(cmd, stdin=subprocess.PIPE)
def mac_from_ip(ip):
cmd = ['/usr/sbin/arp','-na',ip]
p = apply(cmd)
output, errors = p.communicate()
if output is not None :
mac_addr = output.decode().split()[3]
return str(mac_addr)
else:
return None
def create_ip_set():
command_to_execute = ["sudo", "-n"] + GENERIC_IPSET_COMMAND.split() + ["create",IPSET_NAME,"hash:mac","hashsize","1024","maxelem","65536"]
apply(command_to_execute)
command_to_execute = ["sudo", "-n"] + GENERIC_IPSET_COMMAND.split() + ["flush",IPSET_NAME]
apply(command_to_execute)
return
def fill_ipset():
all_machines = Machine.objects.filter(proprio__in=User.objects.filter(state=User.STATE_ACTIVE))
ipset = "%s\nCOMMIT\n" % '\n'.join(["add %s %s" % (IPSET_NAME, str(machine.mac_address)) for machine in all_machines])
command_to_execute = ["sudo", "-n"] + GENERIC_IPSET_COMMAND.split() + ["restore"]
process = apply(command_to_execute)
process.communicate(input=ipset.encode('utf-8'))
return
class iptables:
def __init__(self):
self.nat = "\n*nat"
self.mangle = "\n*mangle"
self.filter = "\n*filter"
def commit(self, chain):
self.add(chain, "COMMIT\n")
def add(self, chain, value):
setattr(self, chain, getattr(self, chain) + "\n" + value)
def init_filter(self, subchain, decision="ACCEPT"):
self.add("filter", ":" + subchain + " " + decision)
def init_nat(self, subchain, decision="ACCEPT"):
self.add("nat", ":" + subchain + " " + decision)
def init_mangle(self, subchain, decision="ACCEPT"):
self.add("mangle", ":" + subchain + " " + decision)
def jump(self, chain, subchainA, subchainB):
self.add(chain, "-A " + subchainA + " -j " + subchainB)
def gen_filter(ipt):
ipt.init_filter("INPUT")
ipt.init_filter("FORWARD")
ipt.init_filter("OUTPUT")
for interface in FORBIDEN_INTERFACES:
ipt.add("filter", "-A FORWARD -o %s -j REJECT --reject-with icmp-port-unreachable" % interface)
ipt.commit("filter")
return ipt
def gen_nat(ipt, nat_active=True):
ipt.init_nat("PREROUTING")
ipt.init_nat("INPUT")
ipt.init_nat("OUTPUT")
ipt.init_nat("POSTROUTING")
if nat_active:
ipt.init_nat("CAPTIF", decision="-")
ipt.jump("nat", "PREROUTING", "CAPTIF")
ipt.jump("nat", "POSTROUTING", "MASQUERADE")
if PORTAIL_ACTIVE:
ipt.add("nat", "-A CAPTIF -m set ! --match-set %s src -j DNAT --to-destination %s" % (IPSET_NAME, SERVER_SELF_IP))
ipt.jump("nat", "CAPTIF", "RETURN")
ipt.commit("nat")
return ipt
def gen_mangle(ipt):
ipt.init_mangle("PREROUTING")
ipt.init_mangle("INPUT")
ipt.init_mangle("FORWARD")
ipt.init_mangle("OUTPUT")
ipt.init_mangle("POSTROUTING")
for interface in AUTORIZED_INTERFACES:
ipt.add("mangle", """-A PREROUTING -i %s -m state --state NEW -j LOG --log-prefix "LOG_ALL " """ % interface)
ipt.commit("mangle")
return ipt
def restore_iptables():
""" Restrore l'iptables pour la création du portail. Est appellé par root au démarage du serveur"""
ipt = iptables()
gen_mangle(ipt)
gen_nat(ipt)
gen_filter(ipt)
global_chain = ipt.nat + ipt.filter + ipt.mangle
command_to_execute = ["sudo","-n","/sbin/iptables-restore"]
process = apply(command_to_execute)
process.communicate(input=global_chain.encode('utf-8'))
return
def disable_iptables():
""" Insère une iptables minimaliste sans nat"""
ipt = iptables()
gen_mangle(ipt)
gen_filter(ipt)
gen_nat(ipt, nat_active=False)
global_chain = ipt.nat + ipt.filter + ipt.mangle
command_to_execute = ["sudo","-n","/sbin/iptables-restore"]
process = apply(command_to_execute)
process.communicate(input=global_chain.encode('utf-8'))
return
class UserManager(BaseUserManager):
def _create_user(self, pseudo, name, surname, email, password=None, su=False):
if not pseudo:
raise ValueError('Users must have an username')
user = self.model(
pseudo=pseudo,
name=name,
surname=surname,
email=self.normalize_email(email),
)
user.set_password(password)
user.save(using=self._db)
if su:
user.make_admin()
return user
def create_user(self, pseudo, name, surname, email, password=None):
"""
Creates and saves a User with the given pseudo, name, surname, email,
and password.
"""
return self._create_user(pseudo, name, surname, email, password, False)
def create_superuser(self, pseudo, name, surname, email, password):
"""
Creates and saves a superuser with the given pseudo, name, surname,
email, and password.
"""
return self._create_user(pseudo, name, surname, email, password, True)
class User(AbstractBaseUser):
PRETTY_NAME = "Utilisateurs"
STATE_ACTIVE = 0
STATE_DISABLED = 1
STATE_ARCHIVE = 2
STATES = (
(0, 'STATE_ACTIVE'),
(1, 'STATE_DISABLED'),
(2, 'STATE_ARCHIVE'),
)
name = models.CharField(max_length=255)
surname = models.CharField(max_length=255)
email = models.EmailField()
state = models.IntegerField(choices=STATES, default=STATE_ACTIVE)
pseudo = models.CharField(max_length=32, unique=True, help_text="Doit contenir uniquement des lettres, chiffres, ou tirets. ")
comment = models.CharField(help_text="Commentaire, promo", max_length=255, blank=True)
registered = models.DateTimeField(auto_now_add=True)
admin = models.BooleanField(default=False)
USERNAME_FIELD = 'pseudo'
REQUIRED_FIELDS = ['name', 'surname', 'email']
objects = UserManager()
@property
def is_active(self):
return self.state == self.STATE_ACTIVE
@property
def is_staff(self):
return self.is_admin
@property
def is_admin(self):
return self.admin
@is_admin.setter
def is_admin(self, value):
if value and not self.is_admin:
self.make_admin()
elif not value and self.is_admin:
self.un_admin()
def has_perms(self, perms, obj=None):
for perm in perms:
if perm=="admin":
return self.is_admin
return False
def get_full_name(self):
return '%s %s' % (self.name, self.surname)
def get_short_name(self):
return self.name
def has_perm(self, perm, obj=None):
return True
def has_module_perms(self, app_label):
# Simplest version again
return True
def make_admin(self):
""" Make User admin """
self.admin = True
self.save()
def un_admin(self):
self.admin = False
self.save()
def machines(self):
return Machine.objects.filter(proprio=self)
def __str__(self):
return self.name + " " + self.surname
class Machine(models.Model):
proprio = models.ForeignKey('User', on_delete=models.PROTECT)
mac_address = MACAddressField(integer=False, unique=True)
def add_to_set(self):
command_to_execute = ["sudo", "-n"] + GENERIC_IPSET_COMMAND.split() + ["add",IPSET_NAME,str(self.mac_address)]
apply(command_to_execute)
def del_to_set(self):
command_to_execute = ["sudo", "-n"] + GENERIC_IPSET_COMMAND.split() + ["del",IPSET_NAME,str(self.mac_address)]
apply(command_to_execute)
@receiver(post_save, sender=Machine)
def machine_post_save(sender, **kwargs):
machine = kwargs['instance']
machine.add_to_set()
@receiver(post_delete, sender=Machine)
def machine_post_delete(sender, **kwargs):
machine = kwargs['instance']
machine.del_to_set()
class Request(models.Model):
PASSWD = 'PW'
EMAIL = 'EM'
TYPE_CHOICES = (
(PASSWD, 'Mot de passe'),
(EMAIL, 'Email'),
)
type = models.CharField(max_length=2, choices=TYPE_CHOICES)
token = models.CharField(max_length=32)
user = models.ForeignKey('User', on_delete=models.PROTECT)
created_at = models.DateTimeField(auto_now_add=True, editable=False)
expires_at = models.DateTimeField()
def save(self):
if not self.expires_at:
self.expires_at = timezone.now() \
+ datetime.timedelta(hours=REQ_EXPIRE_HRS)
if not self.token:
self.token = str(uuid.uuid4()).replace('-', '') # remove hyphens
super(Request, self).save()
class BaseInfoForm(ModelForm):
def __init__(self, *args, **kwargs):
super(BaseInfoForm, self).__init__(*args, **kwargs)
self.fields['name'].label = 'Prénom'
self.fields['surname'].label = 'Nom'
#self.fields['comment'].label = 'Commentaire'
class Meta:
model = User
fields = [
'name',
'pseudo',
'surname',
'email',
]
class EditInfoForm(BaseInfoForm):
class Meta(BaseInfoForm.Meta):
fields = [
'name',
'pseudo',
'surname',
'comment',
'email',
'admin',
]
class InfoForm(BaseInfoForm):
class Meta(BaseInfoForm.Meta):
fields = [
'name',
'pseudo',
'comment',
'surname',
'email',
'admin',
]
class UserForm(EditInfoForm):
class Meta(EditInfoForm.Meta):
fields = '__all__'
class PasswordForm(ModelForm):
class Meta:
model = User
fields = ['password']
class StateForm(ModelForm):
class Meta:
model = User
fields = ['state']
class MachineForm(ModelForm):
class Meta:
model = Machine
exclude = '__all__'