Python解密字符串的实现

tubaobaoya3

env: python 6.6
install pip install PyCrypto==2.3

• from Crypto.Cipher import AES
  
  
• 
  
• import base64
  
• import urllib
  
• import binascii
  
• 
  
• 
  
• """
  
  
•   reference : https://www.dlitz.net/software/pycrypto/api/current/
  
• """
  
• padding = "ThisisPadding"
  
• CHARSET_UTF8="UTF8"
  
• key=b"abcdefghijklmnop"
  
• 
  
• originalUrl = "http://stackoverflow.com/questions/25694006/valueerror-input-strings-must-be-a-multiple-of-16-in-length-error-on-decryption"
  
• originalUrl = "http://stackover"*3+"123"
  
• 
  
• def encrypt(msg):
  
• 
  
•     #base64_encoded = base64.encodestring(encoded_url) generate multiple lines
  
• 
  
•     EncodeAES = lambda c,e:c.encrypt(e)
  
• 
  
•     #AES key must be either 16, 24, or 32 bytes long
  
•     cipher = AES.new(key)
  
• 
  
•     #The string here must be multiple 16 length
  
•     encrypted_msg = EncodeAES(cipher,msg+padding)
  
• 
  
•     base64_encoded = base64.b64encode(encrypted_msg)
  
• 
  
•     encoded = urllib.quote(base64_encoded).encode(CHARSET_UTF8)
  
•     return encoded
  
• 
  
• 
  
• 
  
• def decrypt(msg):
  
• 
  
•     print "msg:%d" % len(msg)
  
•     decoded_url = urllib.unquote(msg).decode(CHARSET_UTF8)
  
• 
  
•     print "durl:%d" %len(decoded_url)
  
• 
  
•     base64_decoded = base64.decodestring(decoded_url)
  
• 
  
•     print "b64:%d" %len(base64_decoded)
  
• 
  
•     DecodeAES = lambda c, e: c.decrypt(e).rstrip(padding)
  
• 
  
•     cipher = AES.new(key)
  
• 
  
•     decoded = DecodeAES(cipher, base64_decoded)
  
• 
  
•     print decoded
  
• 
  
• enmsg=encrypt(originalUrl)
  
• 
  
• print enmsg
  
• 
  
• decrypt(enmsg)