126 lines
4.0 KiB
Python
126 lines
4.0 KiB
Python
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import re
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class CaesarCypherClass:
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"""
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恺撒密码，提供以恺撒密码方法进行加密及解密的方法，加密方法使用CaesarEncode()函数，解密方法使用CaesarDecode()函数
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"""
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def __init__(self, *args, **kwargs):
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pass
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@staticmethod
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def caesar_encode(s):
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"""
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恺撒密码加密方法，需要提供需要加密的明文。
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"""
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s_encode = ''
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for c in s:
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if 'a' <= c <= 'z':
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s_encode += chr(ord('a') + (ord(c) - ord('a') + 3) % 26)
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elif 'A' <= c <= 'Z':
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s_encode += chr(ord('A') + (ord(c) - ord('A') + 3) % 26)
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elif 0x4E00 <= ord(c) <= 0x9FA5:
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s_encode += chr(ord(c) + 3)
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elif '0' <= c <= '9':
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s_encode += chr(ord('0') + (ord(c) - ord('0') + 3) % 10)
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else:
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s_encode += c
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return s_encode
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@staticmethod
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def caesar_decode(s):
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"""
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恺撒密码解密方法，需要提供需要解密的密文。
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"""
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s_decode = ''
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for c in s:
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if 'a' <= c <= 'z':
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s_decode += chr(ord('a') + (ord(c) - ord('a') - 3) % 26)
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elif 'A' <= c <= 'Z':
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s_decode += chr(ord('A') + (ord(c) - ord('A') - 3) % 26)
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elif 0x4E00 <= ord(c) <= 0x9FA5:
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s_decode += chr(ord(c) - 3)
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elif '0' <= c <= '9':
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s_decode += chr(ord('0') + (ord(c) - ord('0') - 3) % 10)
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else:
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s_decode += c
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return s_decode
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class Base64CypherClass:
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"""
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Base64的加解密算法，最简单的加密方式，可加密短的文字、小图片、小文件，图片文件大小不宜超过10M
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"""
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def __init__(self, *args, **kwargs):
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"""
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Base64类初始化函数
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:param args:
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:param kwargs:
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"""
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import importlib
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self.base64 = importlib.import_module('base64')
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self.os = importlib.import_module('os')
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self.time = importlib.import_module('time')
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self.re = importlib.import_module('re')
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@staticmethod
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def base64_encode_str(self, s):
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"""
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Base64字符串加密
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:param self:
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:param s: 要加密的字符串
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:return: 加密后的字符串
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"""
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return self.base64.b64encode(s.encode('utf-8'))
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@staticmethod
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def base64_decode_str(self, s):
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"""
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Base64字符串解密，解密前先判断是否为Base64加密方式
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:param self:
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:param s: 要解密的字符串
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:return: 解密后的字符串
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"""
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try:
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self.base64.b64decode(s)
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return self.base64.b64decode(s).decode('utf-8')
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except Exception as e:
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return f"base64解密失败，请确定加密方式是否正确。错误信息：{e}"
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@staticmethod
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def base64_encode_pic(self, pic):
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"""
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Base64加密图片，路径不存在则返回"图片路径不存在"
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:param self:
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:param pic: 要加密的图片路径
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:return: 返回加密的base64字符
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"""
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if self.os.path.exists(pic):
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with open(pic, 'rb') as f:
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read_pic = open(pic, 'rb')
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read_data = read_pic.read()
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read_pic.close()
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return self.base64.b64encode(read_data)
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else:
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return "图片路径不存在"
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@staticmethod
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def base64_decode_pic(self, pic_bs64):
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"""
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Base64解密图片
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:param self:
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:param pic_bs64:
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:return: 返回图片路径
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"""
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pic_path = f"upload/temp/pic{int(self.time.time())}"
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if self.os.path.exists(f"{pic_path}.jpg"):
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self.os.remove(f"{pic_path}.jpg")
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elif not self.os.path.exists("upload/temp/pic"):
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self.os.path.mkdir("upload/temp/pic")
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with open(f"{pic_path}.jpg", 'wb') as f:
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f.write(self.base64.b64decode(pic_bs64))
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return f"{pic_path}.jpg"
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