mirror of
https://github.com/daiyanan1992/qinglongtest
synced 2025-12-19 00:04:38 +08:00
53 lines
2.5 KiB
Python
53 lines
2.5 KiB
Python
#!/usr/bin/python3
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# -- coding: utf-8 --
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# -------------------------------
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# @Author : github@limoruirui https://github.com/limoruirui
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# @Time : 2022/8/22 18:13
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# -------------------------------
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"""
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aes加密解密工具 目前仅支持ECB/CBC 块长度均为128位 padding只支持pkcs7/zero_padding(aes中没有pkcs5 能用的pkcs5其实是执行的pkcs7) 后续有需要再加
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pycryptdemo限制 同一个aes加密对象不能即加密又解密 所以当加密和解密都需要执行时 需要重新new一个对象增加额外开销
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-- A cipher object is stateful: once you have encrypted a message , you cannot encrypt (or decrypt) another message using the same object.
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"""
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try:
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from Crypto.Cipher import AES
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except:
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print("检测到还未安装 pycryptdome 请按照md的方法安装")
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exit(0)
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from binascii import b2a_hex, a2b_hex
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from base64 import b64encode, b64decode
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class AES_Ctypt:
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def __init__(self, key, iv=None, mode="ECB"):
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if len(key) % 16 != 0:
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key = key + (AES.block_size - len(key) % AES.block_size) * chr(0)
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self.key = key.encode("utf-8")
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if mode == "ECB":
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self.mode = AES.MODE_ECB
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elif mode == "CBC":
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self.mode = AES.MODE_CBC
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else:
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print("您选择的加密方式错误")
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if iv is None:
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self.cipher = AES.new(self.key, self.mode)
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else:
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if isinstance(iv, str):
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self.cipher = AES.new(self.key, self.mode, iv.encode("utf-8"))
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else:
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print("偏移量不为字符串")
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def encrypt(self, data, padding="pkcs7", b64=False):
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bs = AES.block_size
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pkcs7_padding = lambda s: s + (bs - len(s.encode()) % bs) * chr(bs - len(s.encode()) % bs)
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zero_padding = lambda s: s + (bs - len(s) % bs) * chr(0)
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pad = pkcs7_padding if padding=="pkcs7" else zero_padding
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data = self.cipher.encrypt(pad(data).encode("utf8"))
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encrypt_data = b64encode(data) if b64 else b2a_hex(data) # 输出hex或者base64
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return encrypt_data.decode('utf8')
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def decrypt(self, data, b64=False):
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data = b64decode(data) if b64 else a2b_hex(data)
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decrypt_data = self.cipher.decrypt(data).decode()
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# 去掉padding
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# pkcs7_unpadding = lambda s: s.replace(s[-1], "")
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# zero_unpadding = lambda s: s.replace(chr(0), "")
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# unpadding = pkcs7_unpadding if padding=="pkcs7" else zero_unpadding
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unpadding = lambda s: s.replace(s[-1], "")
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return unpadding(decrypt_data) |