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55 lines
1.3 KiB
Python
55 lines
1.3 KiB
Python
import base64
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from Crypto.Cipher import AES
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from django.conf import settings
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class AESCrypto:
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"""
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AES
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除了MODE_SIV模式key长度为：32, 48, or 64,
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其余key长度为16, 24 or 32
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详细见AES内部文档
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CBC模式传入iv参数
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本例使用常用的ECB模式
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"""
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def __init__(self, key):
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if len(key) > 32:
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key = key[:32]
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self.key = self.to_16(key)
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@staticmethod
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def to_16(key):
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"""
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转为16倍数的bytes数据
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:param key:
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:return:
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"""
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key = bytes(key, encoding="utf8")
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while len(key) % 16 != 0:
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key += b'\0'
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return key # 返回bytes
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def aes(self):
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return AES.new(self.key, AES.MODE_ECB) # 初始化加密器
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def encrypt(self, text):
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aes = self.aes()
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return str(base64.encodebytes(aes.encrypt(self.to_16(text))),
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encoding='utf8').replace('\n', '') # 加密
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def decrypt(self, text):
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aes = self.aes()
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return str(aes.decrypt(base64.decodebytes(bytes(text, encoding='utf8'))).rstrip(b'\0').decode("utf8")) # 解密
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def get_aes_crypto(key=None):
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if key is None:
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key = settings.SECRET_KEY
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a = AESCrypto(key)
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return a
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aes_crypto = get_aes_crypto()
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