Thanks Alexandre and Vincent but I need of a bit more help with this.
I'm working in a software to protect my main software. Look how I want
to make:
- This software will be a TCP Server (I'm calling it of Authentication
software).
- This software must run in the console, then I can't have graphical
application for it. I want to make this software runs az daemon on the
future.
- I'll have some informations of the server (hardware information that I
get on /proc) and the number of stations that can use my main software
together storaged in a crypted file.
- I need to read this crypted file, decrypt it and compare with the
informations of /proc again. Then I need of a form to encrypt/decrypt
the file to compare with the actual information.
If I use md5 I can't decrypt the text. In yours opnion what's the
indicate algorithm do make this?
Thanks again
Fabrício F. Kammer
Conchal/SP/Brazil
Vincent Snijders escreveu:
Alexandre Leclerc wrote:
There are two hash in: fpcsrc/packages/base/hash
There is, for example, Blowfish (a ciphers for actual
encryption/decryption) in: fpcsrc/fcl/incblowfish.pp
Blowfish is very good by the way (as is fast). There are many others;
I also saw a a kit of many ciphers in Delphi which could certainly
work on FPC. See
http://www.efg2.com/Lab/Library/Delphi/MathFunctions/Cryptography.htm
for many of them.
I used that one http://www.cityinthesky.co.uk/cryptography.html in a
project once, but it was under Delphi. It should work under FPC I
think... It's up to you to try.
It has been ported to fpc/lazarus:
http://wiki.lazarus.freepascal.org/index.php/DCPcrypt
Vincent
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