xor.go
· 1.1 KiB · Go
Eredeti
package main
import (
"container/ring"
"flag"
"io/ioutil"
"log"
)
var keyFile string
var keyString string
var inFile string
var outFile string
var keyData []byte
var err error
func init() {
flag.StringVar(&keyFile, "k", "key", "key file to use")
flag.StringVar(&keyString, "s", "", "key to use, as string")
flag.StringVar(&inFile, "f", "file", "file encrypt/decrypt")
flag.StringVar(&outFile, "o", "out", "output file")
}
func check(err error) {
if err != nil {
log.Fatal(err)
}
}
func main() {
flag.Parse()
if keyString == "" {
// load key file
keyData, err = ioutil.ReadFile(keyFile)
check(err)
} else {
keyData = []byte(keyString)
}
// setup ring buffer with key data
r := ring.New(len(keyData))
for i := 0; i < r.Len(); i++ {
r.Value = keyData[i]
r = r.Next()
}
// load encrypted data from file
data, err := ioutil.ReadFile(inFile)
check(err)
for i := 0; i < len(data); i++ { // foreach byte of data
data[i] = r.Value.(byte) ^ data[i] // xor data byte with current ring element
r = r.Next() // move ring forward
}
ioutil.WriteFile(outFile, data, 0700)
}
| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "container/ring" |
| 5 | "flag" |
| 6 | "io/ioutil" |
| 7 | "log" |
| 8 | ) |
| 9 | |
| 10 | var keyFile string |
| 11 | var keyString string |
| 12 | var inFile string |
| 13 | var outFile string |
| 14 | var keyData []byte |
| 15 | var err error |
| 16 | |
| 17 | func init() { |
| 18 | flag.StringVar(&keyFile, "k", "key", "key file to use") |
| 19 | flag.StringVar(&keyString, "s", "", "key to use, as string") |
| 20 | flag.StringVar(&inFile, "f", "file", "file encrypt/decrypt") |
| 21 | flag.StringVar(&outFile, "o", "out", "output file") |
| 22 | } |
| 23 | |
| 24 | func check(err error) { |
| 25 | if err != nil { |
| 26 | log.Fatal(err) |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | func main() { |
| 31 | flag.Parse() |
| 32 | if keyString == "" { |
| 33 | // load key file |
| 34 | keyData, err = ioutil.ReadFile(keyFile) |
| 35 | check(err) |
| 36 | } else { |
| 37 | keyData = []byte(keyString) |
| 38 | } |
| 39 | // setup ring buffer with key data |
| 40 | r := ring.New(len(keyData)) |
| 41 | for i := 0; i < r.Len(); i++ { |
| 42 | r.Value = keyData[i] |
| 43 | r = r.Next() |
| 44 | } |
| 45 | // load encrypted data from file |
| 46 | data, err := ioutil.ReadFile(inFile) |
| 47 | check(err) |
| 48 | for i := 0; i < len(data); i++ { // foreach byte of data |
| 49 | data[i] = r.Value.(byte) ^ data[i] // xor data byte with current ring element |
| 50 | r = r.Next() // move ring forward |
| 51 | } |
| 52 | ioutil.WriteFile(outFile, data, 0700) |
| 53 | } |
| 54 |