Hi gyus,
i use DCPcrypt in my project and found out that the rijndael cipher gives different results in Lazarus 1.2 than the results i got in Lazarus 1.0
truth is that i didn't have any time to examine and maybe i won't in the next few days so if anyone wants to look into it before the official version comes out, it would be nice

regards,
Chris

What platform and what version of FPC? Do you have an example code with test values (i.e. both plain and encrypted data)? I'm using Tiger2 from DCPcrypt but I think it would be best if we could see your actual problem.

Chris Crori wrote

i use DCPcrypt in my project and found out that the rijndael cipher gives different results in Lazarus 1.2 than the results i got in Lazarus 1.0

Some questions:

1) Did you use the same FPC versions? FPC Trunk has had some major changes compared to previous released versions.

2) What target platform did you test with? 64-bit, 32-bit etc?

3) Was OS did you test on? Was both tests on Windows, was it the same version of Windows? Or was it Linux vs Windows etc.

I use DCPCrypt on multiple platforms (Linux, Windows and FreeBSD) and multiple targets (32bit & 64-bit), but all with the same version of FPC (2.6.2), and I have consistent results on all platforms and targets. I don't use the Rijndael Cipher though.

Regards,
- Graeme -

Chris Crori wrote

i use DCPcrypt in my project and found out that the rijndael cipher gives different results in Lazarus 1.2 than the results i got in Lazarus 1.0

Also as Mark mentioned... Some test code with expected results would be very valuable in debugging this issue.

Regards,
- Graeme -

Especially if those are FPCUnit... pardon FPTest (I suppose) tests ;)

OT: Graeme, have you read this:
http://forum.lazarus.freepascal.org/index.php/topic,22609.msg133713.html#msg133713 apparently there's somebody willing to improve DCPCrypt...

I notice a health warning at http://wiki.freepascal.org/DCPcrypt relating to non-standard key sizes. Graeme, I see you're down as the maintainer: does Rijndael have a self-test and (Chris) are you using it?

I see that I've extended the Tiger2 self-test to make sure UpdateStr() concatenates properly, but I've not recorded why I thought that was advisable. That procedure does look sensitive to whether its parameter is ASCII or Unicode, and something like a ? character in the input could mess things up.

I think you 're onto something, my key is in UTF-8 so maybe that's the problem.
i didn't even look for self test
:( (kind of feeling stupid right now, unable to help)

also, Graeme :

Some questions: 1) Did you use the same FPC versions? FPC Trunk has had some major changes compared to previous released versions.

I used only FPC 2.6.2

2) What target platform did you test with? 64-bit, 32-bit etc? 3) Was OS did you test on? Was both tests on Windows, was it the same version of Windows? Or was it Linux vs Windows etc.

I have same results in win7, 32 and 64 bit, and winXP 32 bit

Reinier Olislagers wrote

Especially if those are FPCUnit... pardon FPTest (I suppose) tests ;)

Either of those will be great, but just having a few lines of sample code with expected results would also suffice.

OT: Graeme, have you read this: http://forum.lazarus.freepascal.org/index.php/topic,22609.msg133713.html#msg133713 apparently there's somebody willing to improve DCPCrypt...

I'm pretty useless when it comes to web forums. I find them very hard to follow new messages or new topics. With email clients or NNTP news clients I have filters on all incoming messages that notify me about topics mentioning me or topics I am interested in. Web Forums don't have such functionality sadly.

Thanks for pointing out that topic though. I posted some comments there and will take a ,
- Graeme -

Noticed there's a selftest built into Rijndael, so that's something already also (dis al iets, kannie hierdie sin mooi in Engels kry nie)

Reinier Olislagers wrote

Noticed there's a selftest built into Rijndael, so that's something

Ah yes, definitely a start. A set of standard unit tests seems like a good thing to add too.

I also see I need to update the project's README file. It's way out of date, and probably adds to the confusion with other DCPCrypt versions floating around on the Internet.

Regards,
- Graeme -