Python to implement a certificate-free encryption and decryption instance _python

The example of this article is about Python encryption and decryption method without certificate, share for everyone reference. The implementation methods are as follows:

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

Copy Code code as follows:

'''
/**
* 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.jb51.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.jb51.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.jb51.net!! ', base64 = True):
encrypted = Encrypted.decode (' base64 ') if Base64 is True else Encrypted.decode (' hex ')
If encrypted is not ':
obj = Aes.new (key, AES. MODE_CBC, IV)
return Obj.decrypt (encrypted)
Else
Return False

Print DECRYPT_MODE_CBC (encrypt, ' www.jb51.net!! ')
Exit ()

I hope this article will help you with your Python programming.