package main import ( "encoding/hex" "os" "strings" "github.com/rfjakob/gocryptfs/internal/cryptocore" "github.com/rfjakob/gocryptfs/internal/toggledlog" ) // 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 " } } toggledlog.Info.Printf(` 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. `, toggledlog.ColorGrey+hChunked+toggledlog.ColorReset) } // 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 { toggledlog.Fatal.Printf("Could not parse master key: %v\n", err) os.Exit(1) } if len(key) != cryptocore.KeyLen { toggledlog.Fatal.Printf("Master key has length %d but we require length %d\n", len(key), cryptocore.KeyLen) os.Exit(1) } return key }