John the Ripper add-on

[gorn]

I need to write a add on for john the ripper, and i looked a little at the DES_fmt.c and DES_std.c/h but it looks rather complex, and there are no comments.

anyone know of a well commented or just instructions for how to do this?

thanks!

[Bakunin Vax]

Password cracking, tsk tsk tsk....

[gorn]

thanks for... not helping.

and it's legitimate

[Ashcrow]

What exactly is the add on for? Unfortunatly, I can not find anyone who has a commented or paper explaining the code. I do, however know of many DES primers online ...

http://www.tropsoft.com/strongenc/des.htm
http://www.eventid.net/docs/desexample.htm
http://www.cebrasoft.co.uk/encryption/des.htm

and there are lots of DES code examples in Java when serching DES encryption in google.com

I hope this helps.

[gorn]

see interbase uses funny passwords. it's like:

foo = crypt("plainText", "9z" //salt is constant
bar = crypt(&foo[2], "9z"

&bar[2] is then the stored password.

/so/ i need to modify the DES code to crypt twice and do it that special way. but it's tricky.