157 lines
4.8 KiB
Python
157 lines
4.8 KiB
Python
import nacl
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import base64
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from nacl import pwhash
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from django.db import models
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from django.core.cache import cache
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from django.utils.translation import gettext_lazy as _
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from django.contrib.auth.models import BaseUserManager, AbstractBaseUser
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class UserManager(BaseUserManager):
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def create_user(self, email, password=None):
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"""
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Creates and saves a User with the given email, date of
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birth and password.
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"""
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if not email:
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raise ValueError("Users must have an email address")
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user = self.model(
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email=self.normalize_email(email),
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)
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user.set_password(password)
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user.save(using=self._db)
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return user
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def create_superuser(self, email, password=None):
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"""
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Creates and saves a superuser with the given email, date of
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birth and password.
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"""
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user = self.create_user(
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email,
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password=password,
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)
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user.is_admin = True
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user.save(using=self._db)
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return user
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class User(AbstractBaseUser):
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email = models.EmailField(
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_('Email address'),
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max_length=255,
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unique=True,
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)
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is_active = models.BooleanField(default=True)
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is_admin = models.BooleanField(default=False)
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first_name = models.CharField(_("First name"), max_length=255, blank=True, null=True)
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last_name = models.CharField(_("Last name"), max_length=255, blank=True, null=True)
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encrypted_sensitive_data = models.CharField(max_length=255)
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salt = models.CharField(max_length=255)
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objects = UserManager()
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USERNAME_FIELD = "email"
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REQUIRED_FIELDS = []
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def __str__(self):
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return self.email
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def has_perm(self, perm, obj=None):
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"Does the user have a specific permission?"
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# Simplest possible answer: Yes, always
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return True
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def has_module_perms(self, app_label):
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"Does the user have permissions to view the app `app_label`?"
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# Simplest possible answer: Yes, always
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return True
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@property
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def is_staff(self):
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"Is the user a member of staff?"
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# Simplest possible answer: All admins are staff
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return self.is_admin
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@property
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def username(self):
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"Is the email of the user"
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return self.email
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def get_memberships(self):
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members = set(
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str(dict(x.Types.choices)[x.type]) for x in self.memberships.all()
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)
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return ", ".join(members)
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def get_roles(self):
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roles = []
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for s in self.roles.all():
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for r in s.service.rol.all():
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roles.append(r.name)
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return ", ".join(set(roles))
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def derive_key_from_password(self, password):
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kdf = pwhash.argon2i.kdf
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ops = pwhash.argon2i.OPSLIMIT_INTERACTIVE
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mem = pwhash.argon2i.MEMLIMIT_INTERACTIVE
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return kdf(
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nacl.secret.SecretBox.KEY_SIZE,
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password,
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self.get_salt(),
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opslimit=ops,
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memlimit=mem
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)
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def decrypt_sensitive_data(self, password, data=None):
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sb_key = self.derive_key_from_password(password.encode('utf-8'))
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sb = nacl.secret.SecretBox(sb_key)
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if not data:
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data = self.get_encrypted_sensitive_data()
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if not isinstance(data, bytes):
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data = data.encode('utf-8')
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return sb.decrypt(data).decode('utf-8')
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def encrypt_sensitive_data(self, password, data):
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sb_key = self.derive_key_from_password(password.encode('utf-8'))
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sb = nacl.secret.SecretBox(sb_key)
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if not isinstance(data, bytes):
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data = data.encode('utf-8')
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return base64.b64encode(sb.encrypt(data)).decode('utf-8')
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def get_salt(self):
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return base64.b64decode(self.salt.encode('utf-8'))
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def set_salt(self):
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self.salt = base64.b64encode(nacl.utils.random(16)).decode('utf-8')
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def get_encrypted_sensitive_data(self):
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return base64.b64decode(self.encrypted_sensitive_data.encode('utf-8'))
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def set_encrypted_sensitive_data(self, password):
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key = base64.b64encode(nacl.utils.random(64))
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self.set_salt()
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key_crypted = self.encrypt_sensitive_data(password, key)
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self.encrypted_sensitive_data = key_crypted
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def encrypt_data(self, data, password):
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sb = self.get_secret_box(password)
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value_enc = sb.encrypt(data.encode('utf-8'))
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return base64.b64encode(value_enc).decode('utf-8')
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def decrypt_data(self, data, password):
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sb = self.get_secret_box(password)
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value = base64.b64decode(data.encode('utf-8'))
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return sb.decrypt(value).decode('utf-8')
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def get_secret_box(self, password):
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pw = base64.b64decode(password.encode('utf-8')*4)
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sb_key = self.derive_key_from_password(pw)
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return nacl.secret.SecretBox(sb_key)
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