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package main
import (
"encoding/hex"
"fmt"
"github.com/rfjakob/gocryptfs/cryptfs"
"os"
"strings"
)
// printMasterKey - remind the user that he should store the master key in
// a safe place
func printMasterKey(key []byte) {
h := hex.EncodeToString(key)
var hChunked string
// Try to make it less scary by splitting it up in chunks
for i := 0; i < len(h); i += 8 {
hChunked += h[i : i+8]
if i < 52 {
hChunked += "-"
}
if i == 24 {
hChunked += "\n "
}
}
cryptfs.Info.Printf(`
ATTENTION:
Your master key is: %s
If the gocryptfs.conf file becomes corrupted or you ever forget your password,
there is only one hope for recovery: The master key. Print it to a piece of
paper and store it in a drawer.
`, hChunked)
}
// parseMasterKey - Parse a hex-encoded master key that was passed on the command line
// Calls os.Exit on failure
func parseMasterKey(masterkey string) []byte {
masterkey = strings.Replace(masterkey, "-", "", -1)
key, err := hex.DecodeString(masterkey)
if err != nil {
fmt.Printf("Could not parse master key: %v\n", err)
os.Exit(1)
}
if len(key) != cryptfs.KEY_LEN {
fmt.Printf("Master key has length %d but we require length %d\n", len(key), cryptfs.KEY_LEN)
os.Exit(1)
}
return key
}
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