Hi David,
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?
Thanks
David.
public string DecodeString(byte[] encodedsource)
{
System.Text.UTF8Encoding encoding = new
System.Text.UTF8Encoding();
byte[] bytes = encodedsource;
MemoryStream memstream = new MemoryStream();
memstream.Write(bytes, 0, bytes.Length);
memstream.Position = 0;
SymmetricAlgorithm algorithm =
SymmetricAlgorithm.Create("RijnDael");
algorithm.Key = key;
algorithm.IV = iv;
ICryptoTransform transform = algorithm.CreateDecryptor();
CryptoStream cryptstream = new CryptoStream(memstream,
transform, CryptoStreamMode.Read);
StreamReader reader = new StreamReader(cryptstream);
string returnstring = reader.ReadToEnd();
memstream.Dispose();
reader.Dispose();
cryptstream.Dispose();
return returnstring;
}
-----Original Message-----
From: David Shaw [mailto:[EMAIL PROTECTED]
Sent: 09 May 2006 22:16
To: [email protected]
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).
The
> files
> Are basically CSV format data files.
>
> I've received an email from them containing two symmetric keys for
> testing
> purposes. These do not look like any I've seen before...
>
> key: "ABCDE%^$ABCDE-99" and
> iv: "[EMAIL PROTECTED]"
>
> (Values changed for email)
You can't use GPG or PGP to decrypt this. It looks like they're encrypting
using raw Rijndael.
David
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