From: Robert Klemme <lists@...>
Date: 2012-03-26T18:07:17+09:00
Subject: Re: Write to kernel buffer?

ruby rub wrote in post #1053018:
> memstore = Thread.new {
> start = Time.now.to_i
> loop do
> if Time.now.to_i == (start + 2) then
> wipe = StringIO.new("\0" * @password.bytesize)
> wipe.read(@password.bytesize, @password)
> puts "password cleared"
> break
> end
> end
> }

I think there's a simpler way to achieve wiping:

# read
@password = ...

# wipe after 2 secs
Thread.new do
  sleep 2
  @password.replace("#" * @password.length)
end

Note though that for both approaches you need proper synchronization.

Kind regards

robert

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