python 版DES和MAC算法

#!/usr/bin/env python
# -*- coding: UTF-8 -*-
# 2014/10/16  wrote by yangyongzhen
# QQ:534117529
# global definition
# base = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F]
__author__ = 'YangYongZhen'
base = [str(x) for x in range(10)] + [ chr(x) for x in range(ord('A'),ord('A')+6)]
# bin2dec
# 二进制 to 十进制: int(str,n=10)
def bin2dec(string_num):
  return str(int(string_num, 2))
# hex2dec
# 十六进制 to 十进制
def hex2dec(string_num):
  return str(int(string_num.upper(), 16))
# dec2bin
# 十进制 to 二进制: bin()
def dec2bin(string_num):
  num = int(string_num)
  mid = []
  while True:
    if num == 0: break
    num,rem = divmod(num, 2)
    mid.append(base[rem])
  return ''.join([str(x) for x in mid[::-1]])
# dec2hex
# 十进制 to 八进制: oct()
# 十进制 to 十六进制: hex()
def dec2hex(string_num):
  num = int(string_num)
  if num==0:
    return '0'
  mid = []
  while True:
    if num == 0: break
    num,rem = divmod(num, 16)
    mid.append(base[rem])
  return ''.join([str(x) for x in mid[::-1]])
# hex2tobin
# 十六进制 to 二进制: bin(int(str,16))
def hex2bin(string_num):
  return dec2bin(hex2dec(string_num.upper()))
# bin2hex
# 二进制 to 十六进制: hex(int(str,2))
def bin2hex(string_num):
  return dec2hex(bin2dec(string_num))
'''
/**
 * PBOC3DES 加密算法
 * @author Administrator
 *
 */
'''
class PBOC_DES():
  pass
'''
/** ***************************压缩替换S-Box************************************************* */
'''
subKey = [([0] * 48) for ll in range(16)]
s1 = [
    [ 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7 ],
    [ 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8 ],
    [ 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0 ],
    [ 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 ] ]
s2 = [
    [ 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10 ],
    [ 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5 ],
    [ 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15 ],
    [ 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 ] ]
s3 = [
    [ 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8 ],
    [ 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1 ],
    [ 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7 ],
    [ 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 ] ]
s4 = [
    [ 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15 ],
    [ 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9 ],
    [ 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4 ],
    [ 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 ] ]
s5 = [
    [ 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9 ],
    [ 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6 ],
    [ 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14 ],
    [ 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 ] ]
s6 = [
    [ 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11 ],
    [ 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8 ],
    [ 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6 ],
    [ 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 ] ]
s7 = [
    [ 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1 ],
    [ 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6 ],
    [ 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2 ],
    [ 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12 ] ]
s8 = [
    [ 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7 ],
    [ 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2 ],
    [ 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8 ],
    [ 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 ] ]
ip = [  58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
    62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
    57, 49, 41, 33, 25, 17,  9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
    61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7 ]
_ip = [ 40, 8, 48, 16, 56, 24, 64, 32, 39, 7,47, 15, 55, 23, 63, 31,
    38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45,13, 53, 21, 61, 29,
    36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11,51, 19, 59, 27,
    34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25 ]
# 每次密钥循环左移位数
LS = [ 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2,2, 1 ]
'''
/**
 * IP初始置换
 * @param source
 * @return
 */
'''
def changeIP(source):
  dest= [0]*64
  global ip
  for i in range(64):
    dest[i] = source[ip[i] - 1]
  return dest
def string2Binary(str):
  le = len(str)
  dest =[0]*le*4
  i = 0
  for c in str:
     i += 4
     j = 0
     s = hex2bin(c)
     l = len(s)
     for d in s:
    dest[i-l+j]=int(d)
    j += 1
  return dest
'''
/**
 * IP-1逆置
 * @param source
 * @return
 */
'''
def changeInverseIP(source):
    dest = [0]*64
    global _ip
    for i in range(64):
      dest[i] = source[_ip[i] - 1]
    return dest
'''
/**
 *
 * 获取轮子密钥(48bit)
 *
 * @param source
 *
 * @return
 *
 */
'''
def setKey(source):
  global subKey
  # 装换4bit
  temp = string2Binary(source)
  # 6bit均分成两部分
  left =  [0]*28
  right = [0]*28
  # 经过PC-14bit转换6bit
  temp1 = [0]*56
  temp1 = keyPC_1(temp)
  # printArr(temp1);
  #将经过转换的temp1均分成两部分
  for i in range(28):
    left[i] = temp1[i]
    right[i] = temp1[i + 28]
  # 经过16次循环左移，然后PC-2置换
  for i in range(16):
    left = keyLeftMove(left, LS[i])
    right = keyLeftMove(right, LS[i])
    for j in range(28):
        temp1[j] = left[j]
        temp1[j + 28] = right[j]
    subKey[i] = keyPC_2(temp1)
'''
/**
 *
 * 6bit的密钥转换成48bit
 * @param source
 * @return
 *
 */
'''
def keyPC_2(source):
  dest = [0]*48
  temp = [ 14, 17, 11, 24, 1,   5,
        3, 28, 15,  6, 21, 10,
       23, 19, 12,  4, 26,  8,
       16,  7, 27, 20, 13,  2,
       41, 52, 31, 37, 47, 55,
       30, 40, 51, 45, 33, 48,
       44, 49, 39, 56, 34, 53,
       46, 42, 50, 36, 29, 32 ]
  for i in range(48):
    dest[i] = source[temp[i] - 1]
  return dest
'''
/**
 *
 * 将密钥循环左移i
 * @param source 二进制密钥数
 * @param i 循环左移位数
 * @return
 *
 */
'''
def keyLeftMove( source, i):
  temp = 0
  global LS
  le = len(source)
  ls = LS[i]
  for k in range(ls):
    temp = source[0]
    for j in range(le-1):
      source[j] = source[j + 1]
  source[le - 1] = temp
  return source
'''
/**
 *
 * 4bit的密钥转换成56bit
 * @param source
 * @return
 *
 */
'''
def keyPC_1(source):
  dest = [0]*56
  temp = [ 57, 49, 41, 33, 25, 17,  9,
        1, 58, 50, 42, 34, 26, 18,
       10,  2, 59, 51, 43, 35, 27,
       19, 11,  3, 60, 52, 44, 36,
       63, 55, 47, 39, 31, 23, 15,
        7, 62, 54, 46, 38, 30, 22,
       14,  6, 61, 53, 45, 37, 29,
       21, 13,  5, 28, 20, 12,  4 ]
  for i in range(56):
    dest[i] = source[temp[i] - 1]
  return dest
'''
/**
 * 两个等长的数组做异或
 * @param source1
 * @param source2
 * @return
 */
'''
def diffOr( source1, source2):
  le = len(source1)
  dest = [0]*le
  for i in range(le):
    dest[i] = source1[i] ^ source2[i]
  return dest
'''
/**
 *
 * DES加密--->对称密钥
 * D = Ln(32bit)+Rn(32bit)
 * 经过16轮置
 * @param D(16byte)明文
 * @param K(16byte)轮子密钥
 * @return (16byte)密文
 */
'''
def encryption( D,  K) :
  temp = [0]*64;
  data = string2Binary(D)
  # 第一步初始置
  data = changeIP(data)
  left =  [([0] * 32) for i in range(17)]
  right = [([0] * 32) for i in range(17)]
  for j in range(32):
    left[0][j] = data[j]
    right[0][j] = data[j + 32]
  setKey(K)# sub key ok
  for i in range(1,17):
    # 获取(48bit)的轮子密
    key = subKey[i - 1]
    # L1 = R0
    left[i] = right[i - 1]
    # R1 = L0 ^ f(R0,K1)
    fTemp = f(right[i - 1], key)# 32bit
    right[i] = diffOr(left[i - 1], fTemp)
  #组合的时候，左右调换
  for i in range(32):
    temp[i] = right[16][i]
    temp[32 + i] = left[16][i]
  temp = changeInverseIP(temp)
  str = binary2ASC(intArr2Str(temp))
  return str
'''
/**
 * 8bit压缩2bit
 * @param source(48bit)
 * @return R(32bit) B=E(R)⊕K，将48 位的B 分成8 个分组，B=B1B2B3B4B5B6B7B8
 */
 '''
def press(source) :
  ret = [0]*32
  temp =  [([0] * 6) for i in range(8)]
  s =[s1,s2,s3,s4,s5,s6,s7,s8]
  st=[]
  for i in range(8):
    for j in range(6):
      temp[i][j] = source[i * 6 + j]
  for i in range(8):
    # (16)
    x = temp[i][0] * 2 + temp[i][5]
    # (2345)
    y = temp[i][1] * 8 + temp[i][2] * 4 + temp[i][3] * 2+ temp[i][4]
    val = s[i][x][y]
    ch = dec2hex(str(val))
    # System.out.println("x=" + x + ",y=" + y + "-->" + ch);
    # String ch = Integer.toBinaryString(val);
    st.append(ch)
    # System.out.println(str.toString());
  ret = string2Binary(st)
  # printArr(ret);
  # 置换P
  ret = dataP(ret)
  return ret
'''
/**
 * 置换P(32bit)
 * @param source
 * @return
 */
'''
def dataP( source):
  dest = [0]*32
  temp = [ 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31,
       10, 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25 ]
  le = len(source)
  for i in range(le):
    dest[i] = source[temp[i] - 1]
  return dest
'''
/**
 * 2bit扩展8bit
 * @param source
 * @return
 */
'''
def expend(source):
  ret = [0]*48
  temp = [ 32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9, 8, 9, 10, 11, 12,
       13, 12, 13, 14, 15, 16, 17, 16, 17, 18, 19, 20, 21, 20, 21, 22,
       23, 24, 25, 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1 ]
  for i in range(48):
    ret[i] = source[temp[i] - 1]
  return ret
'''
/**
 * @param R(2bit)
 * @param K(48bit的轮子密
 * @return 32bit
 */
'''
def f( R,  K):
  dest = [0]*32
  temp = [0]*48
  # 先将输入32bit扩展8bit
  expendR = expend(R)# 48bit
  # 与轮子密钥进行异或运
  temp = diffOr(expendR, K);
  # 压缩2bit
  dest = press(temp)
  return dest
'''
/**
 * 将int类型数组拼接成字符串
 * @param arr
 * @return
 */
'''
def intArr2Str( arr) :
  sb = []
  le=len(arr)
  for i in range(le):
    sb.append(str(arr[i]))
  return ''.join(sb)
'''
/**
 * 将二进制字符串转换成十六进制字符
 * @param s
 * @return
 */
'''
def binary2ASC(s):
  st = ''
  ii = 0
  le= len(s)
  #不够4bit左补0
  if le % 4 != 0:
    while ii < (4 - len % 4):
      s = "0" + s
  le=le/4
  for i in range(le):
    st += bin2hex(s[i * 4 : i * 4 + 4])
  return st
if __name__=="__main__":
  D='1111111111111111'
  K='FFFFFFFFFFFFFFFF'
print encryption(D,K)