david.gray at turpin-distribution.com
Wed May 10 10:09:03 CEST 2006
Thanks for the info, even if it's not what I wanted to hear. :-)
What do you mean by "raw Rijndael"?
The C# code that the software house are using is shown below, even if
I clone this program am I likely to be able to decrypt without them sending
me a key in ASCII format?
public string DecodeString(byte encodedsource)
System.Text.UTF8Encoding encoding = new
byte bytes = encodedsource;
MemoryStream memstream = new MemoryStream();
memstream.Write(bytes, 0, bytes.Length);
memstream.Position = 0;
SymmetricAlgorithm algorithm =
algorithm.Key = key;
algorithm.IV = iv;
ICryptoTransform transform = algorithm.CreateDecryptor();
CryptoStream cryptstream = new CryptoStream(memstream,
StreamReader reader = new StreamReader(cryptstream);
string returnstring = reader.ReadToEnd();
From: David Shaw [mailto:dshaw at jabberwocky.com]
Sent: 09 May 2006 22:16
To: gnupg-users at gnupg.org
Subject: Re: Rijndael usage
On Tue, May 09, 2006 at 03:55:15PM +0100, David Gray wrote:
> Hello all,
> Wonder if anyone could give advice on using GnuPG to decrypt
> Files encoded with the Rijndael cipher.
> One of our customers is using a software house to build a website that
> will send encrypted order files to us (the distributor of their stock).
> Are basically CSV format data files.
> I've received an email from them containing two symmetric keys for
> purposes. These do not look like any I've seen before...
> key: "ABCDE%^$ABCDE-99" and
> iv: "ABCDE$*@ABCDE-99"
> (Values changed for email)
You can't use GPG or PGP to decrypt this. It looks like they're encrypting
using raw Rijndael.
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