How to store cipher text in Django Models

Question

I am working on a Cryptography Application in Django 1.8 and trying to store Cipher Text in my model field. Below is my Message model:

class Message(models.Model):
    user_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    user_name = models.ForeignKey(User)
    message = models.TextField()
    encrypted_message = models.CharField(max_length=200, null=True, blank=True)
    hashed_message = models.CharField(max_length=100, null=True, blank=True)

    def __unicode__(self):
        return unicode(self.user_id)

I am using the following pycrypto module in Python to encrypt the message and store the cipher text in my Django Model.

Code for Encryption and Decryption is here:

from Crypto.Cipher import AES
# Encryption

encryption_suite = AES.new('This is a key123', AES.MODE_CFB, 'This is an IV456')
cipher_text = encryption_suite.encrypt("Life is Beautiful")

# Decryption

decryption_suite = AES.new('This is a key123', AES.MODE_CFB, 'This is an IV456')
plain_text = decryption_suite.decrypt(cipher_text)

Now suppose User enters a message My life is Beautiful , then you can see the encrypted message will be:

'encrypted_message':
> u'\ufffdH\x060\ufffd!W\ufffdooK8\ufffdg\ufffd\ufffd\ufffd\ufffd',

{'message': u'Life is beautiful ', 'user_name': , 'encrypted_message': u'\�H\\x060\�!W\�ooK8\�g\�\�\�\�', 'hashed_message': u'8ada92984f1fc55010c4d2fa38d0fba499691bc746f83eff089ba5212a65f083a947aa1fe6209f05278a5dc7ee12b361'}

But the problem is when I am storing this Cipher Text inside my model, it is coming out be some weird characters which I cannot decrypt again. Could anyone help me how can I store cipher text inside my model field and then decrypt it.

Answer 1

您可以使用base64.b64encode()和base64.b64decode()文本带入不会破坏HTML形式的可读形式。