docs: def _tls_del_pad(p):
      """
      Provided with a just decrypted TLSCiphertext (now a TLSPlaintext instance)
      p, the function removes the trailing padding found in p.data. It also
      performs some sanity checks on the padding (length, content, ...). False
      is returned if one of the check fails. Otherwise, True is returned,
      indicating that p.data and p.len have been updated.
      """
  
      if p.len < 1:
          warning("Message format is invalid (padding)")
          return False
  
      padlen = orb(p.data[-1])
      padsize = padlen + 1
  
      if p.len < padsize:
          warning("Invalid padding length")
          return False
  
      if p.data[-padsize:] != chb(padlen) * padsize:
          warning("Padding content is invalid %s", repr(p.data[-padsize:]))
          return False
  
      p.data = p.data[:-padsize]
      p.len -= padsize
  
      return True