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From: Lothar Kimmeringer <news201705@kimmeringer.de>
Newsgroups: sci.crypt,comp.lang.java.programmer
Subject: Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function?
Date: Tue, 19 Jun 2018 22:18:44 +0200
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Karl.Frank wrote:

> The amount of byte to read is exactly defined by
> 
>    int BuffSize = System.in.available();
>    byte[] pwByte = new byte[BuffSize];
>    System.in.read(pwByte, 0, BuffSize);
> 
> How would the program read more byte than necessary?

InputStream.available only returns the number of bytes that
can be read without blocking. Dependent on how the data ends
up there there still might be data left to read that you
missed because of that.

What you're doing here is a common programming error.


Cheers, Lothar
-- 
Lothar Kimmeringer                E-Mail: spamfang@kimmeringer.de
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Always remember: The answer is forty-two, there can only be wrong
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