add dependencies

catalog/common/jsondata.py

@@ -1,13 +1,18 @@
 # pyright: reportIncompatibleMethodOverride=false, reportFunctionMemberAccess=false
 import copy
+from base64 import b64decode, b64encode
 from datetime import date, datetime
 from functools import partialmethod
+from hashlib import sha256
 from importlib import import_module
 
 import django
+from cryptography.fernet import Fernet, MultiFernet
+from django.conf import settings
 from django.core.exceptions import FieldError
-from django.db.models import fields
+from django.db.models import Value, fields
 from django.utils import dateparse, timezone
+from django.utils.encoding import force_bytes
 from django.utils.translation import gettext_lazy as _
 
 # from django.db.models import JSONField as DJANGO_JSONField
@@ -16,6 +21,28 @@ from django.utils.translation import gettext_lazy as _
 from django_jsonform.models.fields import ArrayField as DJANGO_ArrayField
 from django_jsonform.models.fields import JSONField as DJANGO_JSONField
 
+
+def _get_crypter():
+    configured_keys = [settings.SECRET_KEY] + settings.SECRET_KEY_FALLBACKS
+    keys = [Fernet(b64encode(sha256(force_bytes(k)).digest())) for k in configured_keys]
+    if len(keys) == 0:
+        raise ValueError("No keys defined")
+    return MultiFernet(keys)
+
+
+CRYPTER = _get_crypter()
+
+
+def encrypt_str(s: str) -> str:
+    # be sure to encode the string to bytes
+    return CRYPTER.encrypt(s.encode("utf-8")).decode("utf-8")
+
+
+def decrypt_str(t: str) -> str:
+    # be sure to decode the bytes to a string
+    return CRYPTER.decrypt(t.encode("utf-8")).decode("utf-8")
+
+
 __all__ = (
     "BooleanField",
     "CharField",
@@ -29,6 +56,7 @@ __all__ = (
     "IPAddressField",
     "GenericIPAddressField",
     "NullBooleanField",
+    "EncryptedTextField",
     "TextField",
     "TimeField",
     "URLField",
@@ -81,9 +109,6 @@ class JSONFieldDescriptor(object):
         setattr(instance, self.field.json_field_name, json_value)
 
 
-fields.CharField
-
-
 class JSONFieldMixin(object):
     """
     Override django.db.model.fields.Field.contribute_to_class
@@ -226,6 +251,16 @@ class TextField(JSONFieldMixin, fields.TextField):
     pass
 
 
+class EncryptedTextField(JSONFieldMixin, fields.TextField):
+    def to_json(self, value):
+        if value:
+            return encrypt_str(str(value))
+
+    def from_json(self, value):
+        if value:
+            return decrypt_str(value)
+
+
 class TimeField(JSONFieldMixin, fields.TimeField):
     def to_json(self, value):
         if value:

catalog/tests.py

@@ -1,6 +1,7 @@
 from django.test import TestCase
 
 from catalog.book.tests import *
+from catalog.common.jsondata import decrypt_str, encrypt_str
 from catalog.game.tests import *
 from catalog.movie.tests import *
 from catalog.music.tests import *
@@ -39,3 +40,9 @@ class CatalogCase(TestCase):
         self.hyperion_print.merge_to(self.hyperion_ebook)
         resloved = Item.get_by_url(self.hyperion_hardcover.url, True)
         self.assertEqual(resloved, self.hyperion_ebook)
+
+    def test_encypted_field(self):
+        o = "Hello, World!"
+        e = encrypt_str(o)
+        d = decrypt_str(e)
+        self.assertEqual(o, d)

pyproject.toml

@@ -55,6 +55,7 @@ dependencies = [
     "urlman",
     "validators",
     "deepmerge>=1.1.1",
+    "django-typed-models>=0.14.0",
 ]
 
 [tool.rye]

requirements-dev.lock

@@ -103,6 +103,7 @@ django-slack==5.19.0
 django-stubs==5.0.2
 django-stubs-ext==5.0.2
     # via django-stubs
+django-typed-models==0.14.0
 django-tz-detect==0.5.0
 django-user-messages==1.0.0
 djlint==1.34.1

requirements.lock

@@ -82,6 +82,7 @@ django-rq==2.10.2
 django-sass-processor==1.4.1
 django-simple-history==3.7.0
 django-slack==5.19.0
+django-typed-models==0.14.0
 django-tz-detect==0.5.0
 django-user-messages==1.0.0
 dnspython==2.6.1