89 lines
2.6 KiB
Python
89 lines
2.6 KiB
Python
import base64
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import time
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from hashlib import md5
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from typing import Any
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from Crypto import Random
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from Crypto.Cipher import AES
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from app.schemas.exception import ImmediateException
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def retry(ExceptionToCheck: Any,
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tries: int = 3, delay: int = 3, backoff: int = 2, logger: Any = None):
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"""
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:param ExceptionToCheck: 需要捕获的异常
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:param tries: 重试次数
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:param delay: 延迟时间
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:param backoff: 延迟倍数
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:param logger: 日志对象
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"""
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def deco_retry(f):
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def f_retry(*args, **kwargs):
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mtries, mdelay = tries, delay
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while mtries > 1:
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try:
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return f(*args, **kwargs)
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except ImmediateException:
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raise
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except ExceptionToCheck as e:
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msg = f"{str(e)}, {mdelay} 秒后重试 ..."
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if logger:
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logger.warn(msg)
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else:
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print(msg)
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time.sleep(mdelay)
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mtries -= 1
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mdelay *= backoff
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return f(*args, **kwargs)
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return f_retry
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return deco_retry
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def bytes_to_key(data: bytes, salt: bytes, output=48) -> bytes:
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# extended from https://gist.github.com/gsakkis/4546068
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assert len(salt) == 8, len(salt)
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data += salt
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key = md5(data).digest()
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final_key = key
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while len(final_key) < output:
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key = md5(key + data).digest()
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final_key += key
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return final_key[:output]
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def encrypt(message: bytes, passphrase: bytes) -> bytes:
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"""
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CryptoJS 加密原文
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This is a modified copy of https://stackoverflow.com/questions/36762098/how-to-decrypt-password-from-javascript-cryptojs-aes-encryptpassword-passphras
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"""
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salt = Random.new().read(8)
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key_iv = bytes_to_key(passphrase, salt, 32 + 16)
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key = key_iv[:32]
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iv = key_iv[32:]
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aes = AES.new(key, AES.MODE_CBC, iv)
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length = 16 - (len(message) % 16)
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data = message + (chr(length) * length).encode()
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return base64.b64encode(b"Salted__" + salt + aes.encrypt(data))
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def decrypt(encrypted: str | bytes, passphrase: bytes) -> bytes:
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"""
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CryptoJS 解密密文
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来源同encrypt
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"""
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encrypted = base64.b64decode(encrypted)
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assert encrypted[0:8] == b"Salted__"
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salt = encrypted[8:16]
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key_iv = bytes_to_key(passphrase, salt, 32 + 16)
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key = key_iv[:32]
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iv = key_iv[32:]
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aes = AES.new(key, AES.MODE_CBC, iv)
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data = aes.decrypt(encrypted[16:])
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return data[:-(data[-1] if type(data[-1]) == int else ord(data[-1]))]
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