76 lines
1.5 KiB
Go
76 lines
1.5 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
func main() {
|
|
key := `
|
|
8752390146
|
|
ET AON RIS
|
|
5BC/FGHJKLM
|
|
0PQD.VWXYZU`
|
|
p := "you have put on 7.5 pounds since I saw you."
|
|
fmt.Println(p)
|
|
c := enc(key, p)
|
|
fmt.Println(c)
|
|
fmt.Println(dec(key, c))
|
|
}
|
|
|
|
func enc(bd, pt string) (ct string) {
|
|
enc := make(map[byte]string)
|
|
row := strings.Split(bd, "\n")[1:]
|
|
r2d := row[2][:1]
|
|
r3d := row[3][:1]
|
|
for col := 1; col <= 10; col++ {
|
|
d := string(row[0][col])
|
|
enc[row[1][col]] = d
|
|
enc[row[2][col]] = r2d+d
|
|
enc[row[3][col]] = r3d+d
|
|
}
|
|
num := enc['/']
|
|
delete(enc, '/')
|
|
delete(enc, ' ')
|
|
for i := 0; i < len(pt); i++ {
|
|
if c := pt[i]; c <= '9' && c >= '0' {
|
|
ct += num + string(c)
|
|
} else {
|
|
if c <= 'z' && c >= 'a' {
|
|
c -= 'a'-'A'
|
|
}
|
|
ct += enc[c]
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func dec(bd, ct string) (pt string) {
|
|
row := strings.Split(bd, "\n")[1:]
|
|
var cx [10]int
|
|
for i := 1; i <= 10; i++ {
|
|
cx[row[0][i]-'0'] = i
|
|
}
|
|
r2d := row[2][0]-'0'
|
|
r3d := row[3][0]-'0'
|
|
for i := 0; i < len(ct); i++ {
|
|
var r int
|
|
switch d := ct[i]-'0'; d {
|
|
case r2d:
|
|
r = 2
|
|
case r3d:
|
|
r = 3
|
|
default:
|
|
pt += string(row[1][cx[d]])
|
|
continue
|
|
}
|
|
i++
|
|
if b := row[r][cx[ct[i]-'0']]; b == '/' {
|
|
i++
|
|
pt += string(ct[i])
|
|
} else {
|
|
pt += string(b)
|
|
}
|
|
}
|
|
return
|
|
}
|