Python实现的rsa加密算法详解

# -*- coding: utf-8 -*-
#!/usr/bin/env python
def range_prime(start, end):
 l = list()
 for i in range(start, end+1):
  flag = True
  for j in range(2, i):
   if i % j == 0:
    flag = False
    break
  if flag:
   l.append(i)
 return l
def generate_keys(p, q):
 #numbers = (11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47)
 numbers =range_prime(10, 100)
 N = p * q
 C = (p-1) * (q-1)
 e = 0
 for n in numbers:
  if n < C and C % n > 0:
   e = n
   break
 if e==0:
  raise StandardError("e not found") #Python3中改为BaseException
 d = 0
 for n in range(2, C):
  if(e * n) % C == 1:
   d = n
   break
 if d==0:
  raise StandardError("d not found")
 return ((N, e), (N, d))
def encrypt(m, key):
 C, x = key
 return (m ** x) % C
decrypt = encrypt
if __name__ == '__main__':
 pub, pri = generate_keys(47, 79)
 L = range(20, 30)
 C = map(lambda x: encrypt(x, pub), L)
 D = map(lambda x: decrypt(x, pri), C)
 print "测试结果："
 print "keys:", pub, pri
 print "message:", L
 print "encrypt:", C
 print "decrypt:", D