A set of django fields that internally are encrypted using the cryptography.io native python encryption library.
django-cryptographic-fields is set of fields that wrap standard Django fields with encryption provided by the python cryptography library. These fields are much more compatible with a 12-factor design since they take their encryption key from the settings file instead of a file on disk used by keyczar.
While keyczar is an excellent tool to use for encryption, it’s not compatible with Python 3, and it requires, for hosts like Heroku, that you either check your key file into your git repository for deployment, or implement manual post-deployment processing to write the key stored in an environment variable into a file that keyczar can read.
$ pip install django-cryptographic-fields
Add “cryptographic_fields” to your INSTALLED_APPS setting like this:
INSTALLED_APPS = ( ... 'cryptographic_fields', )
django-cryptographic-fields expects the encryption key to be specified using FIELD_ENCRYPTION_KEY in your project’s settings.py file. For example, to load it from the local environment:
FIELD_ENCRYPTION_KEY = os.environ.get(‘FIELD_ENCRYPTION_KEY’, ‘’)
To use an encrypted field in a Django model, use one of the fields from the cryptographic_fields module:
from cryptographic_fields.fields import EncryptedCharField
- class EncryptedFieldModel(models.Model):
- encrypted_char_field = EncryptedCharField(max_length=100)
For fields that require max_length to be specified, the Encrypted variants of those fields will automatically increase the size of the database field to hold the encrypted form of the content. For example, a 3 character CharField will automatically specify a database field size of 100 characters when EncryptedCharField(max_length=3) is specified.
Due to the nature of the encrypted data, filtering by values contained in encrypted fields won’t work properly. Sorting is also not supported.
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