5b5c7a0a5d
As soon as we don't need them anymore, overwrite keys with zeros. Make sure they run out of scope so we don't create a risk of inadvertedly using all-zero keys for encryption. https://github.com/rfjakob/gocryptfs/issues/211
83 lines
2.5 KiB
Go
83 lines
2.5 KiB
Go
package main
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import (
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"os"
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"path/filepath"
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"strings"
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"github.com/rfjakob/gocryptfs/internal/configfile"
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"github.com/rfjakob/gocryptfs/internal/exitcodes"
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"github.com/rfjakob/gocryptfs/internal/nametransform"
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"github.com/rfjakob/gocryptfs/internal/readpassword"
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"github.com/rfjakob/gocryptfs/internal/tlog"
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)
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// initDir prepares a directory for use as a gocryptfs storage directory.
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// In forward mode, this means creating the gocryptfs.conf and gocryptfs.diriv
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// files in an empty directory.
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// In reverse mode, we create .gocryptfs.reverse.conf and the directory does
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// not to be empty.
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func initDir(args *argContainer) {
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var err error
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if args.reverse {
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_, err = os.Stat(args.config)
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if err == nil {
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tlog.Fatal.Printf("Config file %q already exists", args.config)
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os.Exit(exitcodes.Init)
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}
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} else {
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err = checkDirEmpty(args.cipherdir)
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if err != nil {
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tlog.Fatal.Printf("Invalid cipherdir: %v", err)
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os.Exit(exitcodes.Init)
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}
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}
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// Choose password for config file
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if args.extpass == "" {
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tlog.Info.Printf("Choose a password for protecting your files.")
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}
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{
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creator := tlog.ProgramName + " " + GitVersion
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password := readpassword.Twice(args.extpass)
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readpassword.CheckTrailingGarbage()
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err = configfile.CreateConfFile(args.config, password, args.plaintextnames, args.scryptn, creator, args.aessiv, args.devrandom)
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if err != nil {
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tlog.Fatal.Println(err)
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os.Exit(exitcodes.WriteConf)
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}
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// Note: cannot overwrite password because in Go, strings are
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// read-only byte slices.
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// password runs out of scope here
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}
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// Forward mode with filename encryption enabled needs a gocryptfs.diriv
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// in the root dir
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if !args.plaintextnames && !args.reverse {
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err = nametransform.WriteDirIV(nil, args.cipherdir)
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if err != nil {
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tlog.Fatal.Println(err)
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os.Exit(exitcodes.Init)
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}
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}
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mountArgs := ""
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fsName := "gocryptfs"
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if args.reverse {
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mountArgs = " -reverse"
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fsName = "gocryptfs-reverse"
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}
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tlog.Info.Printf(tlog.ColorGreen+"The %s filesystem has been created successfully."+tlog.ColorReset,
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fsName)
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wd, _ := os.Getwd()
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friendlyPath, _ := filepath.Rel(wd, args.cipherdir)
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if strings.HasPrefix(friendlyPath, "../") {
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// A relative path that starts with "../" is pretty unfriendly, just
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// keep the absolute path.
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friendlyPath = args.cipherdir
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}
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if strings.Contains(friendlyPath, " ") {
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friendlyPath = "\"" + friendlyPath + "\""
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}
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tlog.Info.Printf(tlog.ColorGrey+"You can now mount it using: %s%s %s MOUNTPOINT"+tlog.ColorReset,
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tlog.ProgramName, mountArgs, friendlyPath)
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os.Exit(0)
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}
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