func createShadowFile(brigPath string, ID, password string) error {
shadowPath := filepath.Join(brigPath, "shadow")
fd, err := os.OpenFile(shadowPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0755)
if err != nil {
return err
}
defer util.Closer(fd)
salt := make([]byte, 8)
n, err := rand.Reader.Read(salt)
if err != nil {
return err
}
if n != len(salt) {
return fmt.Errorf("Inadeqaute salt length from random generator.")
}
entry := fmt.Sprintf("%s %x %x\n", ID, salt, hashPassword(salt, password))
if _, err := fd.Write([]byte(entry)); err != nil {
return err
}
return nil
}
func parseShadowFile(brigPath string, who string) (*shadowEntry, error) {
fd, err := os.Open(filepath.Join(brigPath, "shadow"))
if err != nil {
return nil, err
}
defer util.Closer(fd)
var entry *shadowEntry
bufd := bufio.NewScanner(fd)
for bufd.Scan() {
var ID string
var salt, hash []byte
_, err = fmt.Sscanf(bufd.Text(), "%s %x %x", &ID, &salt, &hash)
if err != nil && err != io.EOF {
return nil, err
}
if ID == who {
entry = &shadowEntry{ID: ID, salt: salt, hash: hash}
}
}
if err := bufd.Err(); err != nil {
return nil, err
}
// Might be a broken shadow file:
if entry == nil {
return nil, fmt.Errorf("No shadow entry found for `%v`.", who)
}
return entry, nil
}
// PromptNewPassword asks the user to input a password.
//
// While typing, the user gets feedback by the prompt color,
// which changes with the security of the password to green.
// Additionally the entrtopy of the password is shown.
// If minEntropy was not reached after hitting enter,
// this function will log a message and ask the user again.
func PromptNewPassword(minEntropy float64) ([]byte, error) {
rl, err := readline.New("")
if err != nil {
return nil, err
}
defer util.Closer(rl)
passwordCfg := rl.GenPasswordConfig()
passwordCfg.SetListener(func(line []rune, pos int, key rune) (newLine []rune, newPos int, ok bool) {
rl.SetPrompt(createStrengthPrompt(line, " New "))
rl.Refresh()
return nil, 0, false
})
pwd := []byte{}
for {
pwd, err = rl.ReadPasswordWithConfig(passwordCfg)
if err != nil {
return nil, err
}
strength := zxcvbn.PasswordStrength(string(pwd), nil)
if strength.Entropy >= minEntropy {
break
}
fmt.Printf(colors.Colorize(msgLowEntropy, colors.Yellow)+"\n", minEntropy)
}
passwordCfg.SetListener(func(line []rune, pos int, key rune) (newLine []rune, newPos int, ok bool) {
rl.SetPrompt(createStrengthPrompt(line, "Retype "))
rl.Refresh()
return nil, 0, false
})
fmt.Println(colors.Colorize(msgReEnter, colors.Green))
for {
newPwd, err := rl.ReadPasswordWithConfig(passwordCfg)
if err != nil {
return nil, err
}
if bytes.Equal(pwd, newPwd) {
break
}
fmt.Println(colors.Colorize(msgBadPassword, colors.Yellow))
}
return pwd, nil
}
func promptPasswordColored(color int) (string, error) {
prompt := "Password: "******"", err
}
defer util.Closer(rl)
return doPromptLine(rl, prompt, true)
}
func createMasterKey(brigPath string, keySize int) error {
keyPath := filepath.Join(brigPath, "master.key")
fd, err := os.OpenFile(keyPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0755)
if err != nil {
return err
}
defer util.Closer(fd)
if _, err := io.CopyN(fd, rand.Reader, int64(keySize/8)); err != nil {
return err
}
return nil
}
// StageDir traverses all files in a directory and calls StageFromReader on them.
func (st *Store) StageDir(filePath, repoPath string) error {
walkErr := filepath.Walk(filePath, func(path string, info os.FileInfo, err error) error {
// Simply skip errorneous files:
if err != nil {
log.Warningf("Walk: %v", err)
return err
}
// Map the file path relative to repoPath:
repoPath = prefixSlash(repoPath)
currPath := filepath.Join(repoPath, path[len(filePath):])
switch mode := info.Mode(); {
case mode.IsRegular():
fd, openErr := os.Open(path)
if openErr != nil {
return openErr
}
defer util.Closer(fd)
compressAlgo, chooseErr := compress.ChooseCompressAlgo(path, fd)
if err != nil {
return chooseErr
}
err = st.StageFromReader(currPath, fd, compressAlgo)
case mode.IsDir():
_, err = st.Mkdir(currPath)
default:
log.Warningf("Recursive add: Ignoring weird file type: %v")
return nil
}
if err != nil {
log.WithFields(log.Fields{
"file_path": filePath,
"repo_path": repoPath,
"curr_path": currPath,
}).Warningf("StageDir: %v", err)
}
return nil
})
return walkErr
}
func handleCat(ctx *cli.Context, client *daemon.Client) error {
repoPath := prefixSlash(ctx.Args().First())
filePath := ""
isStdoutMode := ctx.NArg() < 2
if isStdoutMode {
tmpFile, err := ioutil.TempFile("", ".brig-tmp-")
if err != nil {
return ExitCode{
UnknownError,
fmt.Sprintf("Unable to create temp file: %v", err),
}
}
filePath = tmpFile.Name()
defer util.Closer(tmpFile)
defer func() {
if err := os.Remove(filePath); err != nil {
log.Warningf("Cannot remove temp-file: %v", err)
}
}()
} else {
absPath, err := filepath.Abs(ctx.Args()[1])
if err != nil {
return ExitCode{
UnknownError,
fmt.Sprintf("Unable to make abs path: %v: %v", filePath, err),
}
}
filePath = absPath
}
if err := client.Cat(repoPath, filePath); err != nil {
return ExitCode{
UnknownError,
fmt.Sprintf("Could not cat file: %v: %v", repoPath, err),
}
}
if isStdoutMode {
fd, err := os.Open(filePath)
if err != nil {
return ExitCode{
UnknownError,
"Could not open temp file",
}
}
if _, err := io.Copy(os.Stdout, fd); err != nil {
return ExitCode{
UnknownError,
fmt.Sprintf("Cannot copy to stdout: %v", err),
}
}
if err := fd.Close(); err != nil {
log.Warningf("Unable to close tmpfile handle: %v", err)
}
}
return nil
}
