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Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function?

From Rich <rich@example.invalid>
Newsgroups sci.crypt
Subject Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function?
Date 2018-05-15 18:49 +0000
Organization A noiseless patient Spider
Message-ID <pdfa3o$a9v$1@dont-email.me> (permalink)
References <pdf0kv$uom$1@news.albasani.net>

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Karl.Frank <Karl.Frank@freecx.co.uk> wrote:
> I've stuck with getting potential wrong results from a Java 7
> implementation.
> 
> If I call a test function like
> 
> echo -n "Lsda[¥~§#?]" | java -jar pbkdf2_stdin.jar "Salt" 4096 16 sha-1
> 
> I get
> 
> Password   : 4c7364615bc2a57ec2a723e282ac5d
> Salt       : 53616c74
> PBKDF2     : aba223d6679ad1e8101c01bf860f788b
> PBKDF2_java: 461f05924a7945a652bcabb30d87fad3
> 
> whereupon PBKDF2 is the result given be my own PBKDF2 implementation and
> PBKDF2_java what I get using the javax library.
> 
> So I'm wondering if converting the Password into a char array instead of
> a byte array might be the correct approach.
> 
> Verified the PBKDF2 result at 
> https://asecuritysite.com/encryption/PBKDF2z and I get: 
> aba223d6679ad1e8101c01bf860f788b
> 
> Can anyone give me a hint on this matter?

Gut feeling (note, I know zero java, and don't want to ever know any
java) -- character encoding issues.

You've got this character in your echo: "¥", but the bytes that end up
getting processed may be different due to character encodings (i.e.,
that character in the 8859 encoding is a different set of bytes than
that same character in the UTF-8 encoding.

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Thread

Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-15 18:07 +0200
  Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-15 18:31 +0200
  Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? Bruce Stephens <bruce.r.stephens@gmail.com> - 2018-05-15 19:46 +0100
    Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-15 20:52 +0200
  Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? Rich <rich@example.invalid> - 2018-05-15 18:49 +0000
    Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-15 21:02 +0200
  Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? wizzofozz <oscxxxxxxxaas@gmail.com> - 2018-05-15 21:09 +0200
    Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? wizzofozz <oscxxxxxxxaas@gmail.com> - 2018-05-15 21:11 +0200
      Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-15 21:25 +0200
    Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-15 21:29 +0200
      Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? wizzofozz <oscxxxxxxxaas@gmail.com> - 2018-05-15 22:07 +0200
      Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? Rich <rich@example.invalid> - 2018-05-15 20:38 +0000
        Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-15 22:57 +0200
  Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-15 21:42 +0200
  Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-15 23:37 +0200
    Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-05-16 15:58 +0200
    Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? Robert Klemme <shortcutter@googlemail.com> - 2018-06-18 18:41 +0200
      Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-06-18 13:33 -0700
      Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-06-19 12:54 +0200
        Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? Lothar Kimmeringer <news201705@kimmeringer.de> - 2018-06-19 22:18 +0200
          Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? Robert Klemme <shortcutter@googlemail.com> - 2018-06-19 23:20 +0200
          Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-06-19 23:23 +0200
        Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? Robert Klemme <shortcutter@googlemail.com> - 2018-06-19 23:15 +0200
          Re: Why is Java 7 converting the Password toCharArray instead of Byte in it's PBKDF2 function? "Karl.Frank" <Karl.Frank@Freecx.co.uk> - 2018-06-20 00:03 +0200

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