#coding: utf8
import sys
from Crypto.Cipher
import AES
from binascii
import b2a_hex, a2b_hex
import base64
def printMemLog2(mem):
byteData=bytearray(mem)
byteLen =len(byteData)
print "printMemLog begin .byteLen:{0}".format(byteLen)
i=0
while i <=byteLen-1:
a=byteData[i]
if i == byteLen-1:
print "%02x "%( a )
break;
i +=1
b=byteData[i]
print "%02x%02x "%( a,b),
i +=1
if i%64 == 0 :
print print print "*"*10
pass#将text按照byteAlignLen字节对齐,如果不对齐,按照差数填充
def bytePad(text,byteAlignLen=16):
count=len(text)
mod_num=count%byteAlignLen
if mod_num==0:
return text
add_num=byteAlignLen-mod_num
print "bytePad:" ,add_num
return text+chr(add_num)*add_num
def byteUnpad(text,byteAlignLen=16):
count=len(text)
print "byteUnpad:",count
mod_num=count%byteAlignLen
assert mod_num==0
lastChar=text[-1]
lastLen=ord(lastChar)
lastChunk=text[-lastLen:]
if lastChunk==chr(lastLen)*lastLen:
#print "byteUnpad"
return text[:-lastLen]
return text
class prpcrypt():
def __init__(self, key):
self.key = key
self.mode = AES.MODE_ECB
self.iv =
'\0' * 16
#加密函数,如果text不是16的倍数【加密文本text必须为16的倍数!】,那就补足为16的倍数
def encrypt(self, text):
cryptor = AES.new(self.key, self.mode, self.iv )
#这里密钥key 长度必须为16(AES-128)、24(AES-192)、或32(AES-256)Bytes 长度.目前AES-128足够用
#length = 16
text=bytePad(text,16)
#add = length - (count % length)
#text = text + ('\0' * add)
self.ciphertext = cryptor.encrypt(text)
#因为AES加密时候得到的字符串不一定是ascii字符集的,输出到终端或者保存时候可能存在问题
#所以这里统一把加密后的字符串转化为16进制字符串
return self.ciphertext
#return b2a_hex(self.ciphertext)
#解密后,去掉补足的空格用strip() 去掉
def decrypt(self, text):
cryptor = AES.new(self.key, self.mode, self.iv )
#plain_text = cryptor.decrypt(a2b_hex(text))
plain_text = cryptor.decrypt(text)
#printMemLog2(plain_text)
#print plain_text
return byteUnpad(plain_text)