我有以下代码,其中我有一段带有字母表的字节,我将这个字母数组复制到一个新变量(cryptkey)中,然后我使用一个函数来洗牌它。结果是字母表和加密密钥字节片被洗牌。如何防止这种情况发生?
package main
import (
"fmt"
"math/rand"
)
func main() {
alphabet := []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz.")
cryptkey := alphabet
fmt.Println(string(alphabet))
cryptkey = shuffle(cryptkey)
fmt.Println(string(alphabet))
}
func shuffle(b []byte) []byte {
l := len(b)
out := b
for key := range out {
dest := rand.Intn(l)
out[key], out[dest] = out[dest], out[key]
}
return out
}
结果:
ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz. miclOfEInzJNvZe.YuVMCdTbXyqtaLwHGjUrABhog xQPWSpKRkDsF
操场!
制作副本。例如
package main
import (
"fmt"
"math/rand"
)
func main() {
alphabet := []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz.")
cryptkey := alphabet
fmt.Println(string(alphabet))
cryptkey = shuffle(cryptkey)
fmt.Println(string(alphabet))
}
func shuffle(b []byte) []byte {
l := len(b)
out := append([]byte(nil), b...)
for key := range out {
dest := rand.Intn(l)
out[key], out[dest] = out[dest], out[key]
}
return out
}
输出:
ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz.