Python No certificate Encryption decryption example

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No certificate encryption is good outside the two sides do not need to maintain the certificate, encryption and decryption only need two parties to agree a key can be, no certificate and decryption way to apply more widely, Python official also has the relevant examples, the address is: https://pypi.python.org/ Pypi/pycrypto, the main use is from Crypto.cipher import AES This module, the code is as follows:
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The code is as follows

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/** * AES Encrypted string * * @param string data-encrypted string * @param string Key key (only 16, 24, 32 bits) * @param string IV 16-bit length vector * @param BOOL Encoding format (true:base64/false: hexadecimal) * The result of @return string encryption */ ''' def ENCRYPT_MODE_CBC (data, key, IV = ' www.111cn.net!! ', base64 = True): Lenth = Len (data) num = lenth% 16 data = Data.ljust (Lenth + 16-num) obj = Aes.new (key, AES. MODE_CBC, IV) result = Obj.encrypt (data) Return Result.encode (' base64 ') if Base64 is True else Result.encode (' hex ') Encrypt = ENCRYPT_MODE_CBC (' Hello Geekso ', ' www.111cn.net!! ') Print Encrypt ' /** * AES Decryption String * * @param string encrypted the string to be decrypted * @param string key key * @param string IV 16-bit length vector * @param bool Encoding (true:base64/false: hexadecimal) * result of @return string decryption or bool */ ' def decrypt_ MODE_CBC (encrypted, key, IV = ' www.111cn.net!! ', base64 = True):     encrypted = Encrypted.decode (' Bas E64 ') If Base64 is True else Encrypted.decode (' hex ')     if encrypted are not ':          obj = aes.new (key, AES. MODE_CBC, iv)         return Obj.decrypt (encrypted)     else:         return False     Print DECRYPT_MODE_CBC ( Encrypt, ' www.111cn.net!! ') Exit ()