66 lines
985 B
Go
66 lines
985 B
Go
package main
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import (
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"fmt"
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"os"
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)
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// go run 10.2.go "input"
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func main() {
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size := 256
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appendList := []byte{17, 31, 73, 47, 23}
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s := os.Args[1]
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s = s + string(appendList)
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list := make([]int, size)
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for i := 0; i < size; i++ {
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list[i] = i
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}
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pos := 0
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skip := 0
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for j := 0; j < 64; j++ {
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for x := range s {
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i := int(s[x])
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// Reverse the section
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r := i/2
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fmt.Println("i:", i, "range:", r)
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for y := 0; y < r; y++ {
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bottom := (pos+y) % size
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top := (pos+i-y-1) % size
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fmt.Println("pos:", pos, "i:", i, "y:", y, "bottom:", bottom, "top:", top)
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tmp := list[bottom]
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list[bottom] = list[top]
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list[top] = tmp
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}
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pos = (pos+i+skip) % size
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fmt.Println(pos, i, list)
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skip++
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}
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}
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for a:=0; a<16; a++ {
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r := list[a*16]
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for b:=1; b<16; b++ {
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xorpos := (a*16)+b
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//fmt.Println("xor:", xorpos, r, list[xorpos])
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r = r ^ list[xorpos]
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}
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fmt.Printf("%x", r)
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//fmt.Println(" ", r)
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}
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fmt.Println("")
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}
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