在ruby中对2个字符串执行按位异或

Question

我试图在ruby中的两个关键字符串上执行Bitwise XOR:

key1:0123456789abcdeffedcba9876543210
key2:00000000000000000000000000000000

有人可以告诉我怎么做,谢谢.

Answer 1

解压缩成字节,压缩,映射xor,重新打包.

s1='0123456789abcdeffedcba9876543210'
s2='00000000000000000000000000000000'
xored = s1.unpack('C*').zip(s2.unpack('C*')).map{ |a,b| a ^ b }.pack('C*')
# => "\x00\x01\x02\x03\x04\x05\x06\a\b\tQRSTUVVUTSRQ\t\b\a\x06\x05\x04\x03\x02\x01\x00"