Hi all,

Does FPC have an encryption library?

Yoyong

Hi all, Does FPC have an encryption library?

Simple encription as MD5 and IDEA are supported.
I'm still working on porting Lockbox from TurboPower, then we should have a complete encryption set available.

Michael.

What function should I use, or where can I find MD5 and IDEA procedures?

Thanks,

Yoyong

Hi,
try here http://www.cityinthesky.co.uk/cryptography.html

or U can try google and use words like pascal +blowfish +aec +rsa +dsa ....

HTH

> Does FPC have an encryption library?

I contributed a unit for AES to www.FreePascal.org. You can also find it at

<http://www.win.tue.nl/~wstomv/software/AES-Rijndael/>

However, this unit is not a genuine crypto library for two reasons:

1. It provides the basic encrypt/decrypt block operations in Electronic Codebook Mode only.

In order to use AES in practice, one needs to operate it in a mode that is appropriate for the desired service. Also see

<http://csrc.nist.gov/encryption/modes/>

2. The implementation is more aimed at clarity than speed. It does feature some techniques for speed (table lookup instead of computation).

It may serve as a good starting point.

Regards,

Tom Verhoeff

What function should I use, or where can I find MD5 and IDEA procedures?

The interface of the MD5 unit can be viewed at

http://www.freepascal.org/docs-html/packages/md5/index-5.html

The IDEA unit is part of the FCL, and is unfortunately not documented. You'll have to look in the sources for that one.

Michael.