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本文实例讲述了Python使用PyCrypto实现AES加密功能。分享给大家供大家参考,具体如下:
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26#!/usr/bin/env python
from
Crypto.Cipher
import
AES
import
base64
import
os
# the block size for the cipher object; must be 16, 24, or 32 for AES
BLOCK_SIZE
=
32
# the character used for padding--with a block cipher such as AES, the value
# you encrypt must be a multiple of BLOCK_SIZE in length. This character is
# used to ensure that your value is always a multiple of BLOCK_SIZE
PADDING
=
'{'
# one-liner to sufficiently pad the text to be encrypted
pad
=
lambda
s: s
+
(BLOCK_SIZE
-
len
(s)
%
BLOCK_SIZE)
*
PADDING
# one-liners to encrypt/encode and decrypt/decode a string
# encrypt with AES, encode with base64
EncodeAES
=
lambda
c, s: base64.b64encode(c.encrypt(pad(s)))
DecodeAES
=
lambda
c, e: c.decrypt(base64.b64decode(e)).rstrip(PADDING)
# generate a random secret key
secret
=
os.urandom(BLOCK_SIZE)
# create a cipher object using the random secret
cipher
=
AES.new(secret)
# encode a string
encoded
=
EncodeAES(cipher,
'password'
)
print
'Encrypted string:'
, encoded
# decode the encoded string
decoded
=
DecodeAES(cipher, encoded)
print
'Decrypted string:'
, decoded
希望本文所述对大家Python程序设计有所帮助。