// PromptPasswordMaxTries tries to read a password maxTries times.
//
// The typed password can be validated by the caller via the passfn function.
// If the user failed to pass the correct password, ErrTooManyTries is returned.
// For visual guidance the prompt color will gradually change from green to red
// with each failed try.
func PromptPasswordMaxTries(maxTries int, passfn func(string) bool) (string, error) {
for i := 0; i < maxTries; i++ {
color := triesToColor[util.Min(i, len(triesToColor))]
pwd, err := promptPasswordColored(color)
if err != nil {
return "", err
}
if !passfn(pwd) {
continue
}
return pwd, err
}
return "", ErrTooManyTries{maxTries}
}
func (w *writer) Write(p []byte) (n int, err error) {
if err := w.writeHeaderIfNeeded(); err != nil {
return 0, err
}
written := len(p)
// Compress only maxChunkSize equal chunks.
for {
n, _ := w.chunkBuf.Write(p[:util.Min(len(p), maxChunkSize)])
if w.chunkBuf.Len() < maxChunkSize {
break
}
if err := w.flushBuffer(w.chunkBuf.Next(maxChunkSize)); err != nil {
return 0, err
}
p = p[n:]
}
return written, nil
}