一个python自定义的加密解密函数,下面的代码实现了对字符串的加密盒解密,调用简单
- def encrypt(key, s):
- b = bytearray(str(s).encode("gbk"))
- n = len(b) # 求出 b 的字节数
- c = bytearray(n*2)
- j = 0
- for i in range(0, n):
- b1 = b[i]
- b2 = b1 ^ key # b1 = b2^ key
- c1 = b2 % 16
- c2 = b2 // 16 # b2 = c2*16 + c1
- c1 = c1 + 65
- c2 = c2 + 65 # c1,c2都是0~15之间的数,加上65就变成了A-P 的字符的编码
- c[j] = c1
- c[j+1] = c2
- j = j+2
- return c.decode("gbk")
- def decrypt(key, s):
- c = bytearray(str(s).encode("gbk"))
- n = len(c) # 计算 b 的字节数
- if n % 2 != 0 :
- return ""
- n = n // 2
- b = bytearray(n)
- j = 0
- for i in range(0, n):
- c1 = c[j]
- c2 = c[j+1]
- j = j+2
- c1 = c1 - 65
- c2 = c2 - 65
- b2 = c2*16 + c1
- b1 = b2^ key
- b[i]= b1
- try:
- return b.decode("gbk")
- except:
- return "failed"
- key = 15
- s1 = encrypt(key, 'hello world')
- s2 = decrypt(key, s1)
- print s1,'\n',s2
- # HGKGDGDGAGPCIHAGNHDGLG
- # hello world
来源: http://www.phpxs.com/code/1005085/