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58 lines
1.8 KiB
58 lines
1.8 KiB
3 years ago
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#!/usr/bin/env python
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# -*- coding:utf-8 -*-
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# project: 11月
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# author: NinEveN
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# date: 2021/11/3
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from django.conf import settings
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from django.db import models
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from api.utils.baseutils import AESCipher
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class AESCharField(models.CharField):
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def __init__(self, *args, **kwargs):
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if 'prefix' in kwargs:
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self.prefix = kwargs['prefix']
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del kwargs['prefix']
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else:
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self.prefix = "aes:::"
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self.cipher = AESCipher(settings.SECRET_KEY)
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super(AESCharField, self).__init__(*args, **kwargs)
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def deconstruct(self):
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name, path, args, kwargs = super(AESCharField, self).deconstruct()
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if self.prefix != "aes:::":
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kwargs['prefix'] = self.prefix
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return name, path, args, kwargs
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def from_db_value(self, value, *args, **kwargs):
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if value is None:
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return value
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if value.startswith(self.prefix):
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value = value[len(self.prefix):]
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if isinstance(value, str):
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value = value.encode('utf-8')
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value = self.cipher.decrypt(value)
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return value
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def to_python(self, value):
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if value is None:
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return value
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elif value.startswith(self.prefix):
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value = value[len(self.prefix):]
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if isinstance(value, str):
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value = value.encode('utf-8')
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value = self.cipher.decrypt(value)
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return value
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def get_prep_value(self, value):
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if isinstance(value, str):
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value = value.encode('utf-8')
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if isinstance(value, bytes):
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value = self.cipher.encrypt(value)
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value = self.prefix + value.decode('utf-8')
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elif value is not None:
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raise TypeError(str(value) + " is not a valid value for AESCharField")
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return value
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