xvpz's Super Mario Cracker
| Download ext-keygenMev21asm.zip, 6 kb (password: crackmes.de) Browse contents of ext-keygenMev21asm.zip This is a keygenme/reverseme, the scheme is written bymyself..
Difficulty: 2 - Needs a little brain (or luck) | RatingWaiting for at least 3 votes View profile of xvpz » |
Solutions
Solution by SnakingMax, published 09. feb, 2016; download (4 kb), password: crackmes.de or browse.
SnakingMax has not rated this crackme yet.
Discussion and comments
| prasid 31. Jul 2008 | keygenme.exe.exe has encountered a problem and needs to close. We are sorry for the inconvenience. What can I do? |
|---|---|
| TiGa 31. Jul 2008 | It's one of the challenges of this crackme, as written in the description. "There's a wrapper, but the unwrapper code is buggy (needs to be patched in one place to reveal the real code), this is meant to be!" |
| TiGa 31. Jul 2008 | A wrapper is a very simple packer. The wrapper encrypted part of the code so the unwrapper must decrypt it during runtime. There's 2 things to fix to make it run: 1 byte and 1 something else. It's easier to fix the something else first. |
| Till.ch 31. Jul 2008 | All over it's a nice KeygenMe, but I found some flaws. Length checking would be useful and the Char Table in the keygenme is buggy. "a-z A-Z in the username-field" what about D and S ;) Thank you for this keygenme :>, files sent by pm. |
| HMX0101 01. Aug 2008 | Nice keygenme.. but its buggy as Till said.. the char table doesn't contains D,S and 0... another bug, if you enter more than 20 chars it will start overwriting the serial! :/.. anyway, still is enjoyable ;) |
| xvpz Author 06. Aug 2008 | ok here´s the new version. Also fixed so that the editboxes doesnt allow more chars than the length of the variables. Seemed to work for me :) |
| jE! 07. Aug 2008 | one strange found: @0040118B: retn 01 one true bug: EDI register not preserved, while used in calculations. |
| xvpz Author 07. Aug 2008 | huh?! The first one is how i coded it, was thinking about doing something with it, but forgot to implement :) About the second one, wich of the calculations are u thinking about ? |
| jE! 07. Aug 2008 | which uses EDI! :) |
| HMX0101 07. Aug 2008 | Just tried to get a key for my name... and guess what? 004032AB 38 4A 47 8JG 004032BB 37 2D 37 00 00 00 2D 63 46 4D 48 2D 47 00 2D 47 7-7...-cFMH-G.-G It can't generate a valid serial for it... another bug? Damn.. mate i think you should take your time to fix it fully :) @jE: in the last three calculations, EDI is preserved and that's bad because you can get some null chars (see my name as example)... before every use of EDI you need to clear it (if you don't plain to use it in another way ;) :D |
| xvpz Author 07. Aug 2008 | Haha ok, just set a breakpoint on the last call testing my nick wich worked... so well thought it should work since no major changes was made (and not in that functions :P) But, i got my idea what causes it. |
| Grift 08. Aug 2008 | Nice keygenme. @HMX0101: the serial routine does work, it could be worth spending a bit more time on. There might be more factors to consider for the valid serial generation than just your name. |
| xvpz Author 09. Aug 2008 | @Grift you're right. For those getting this 0x0h-problem, try enter the bogus serial in another format. But, it was not my intention have this problem, but if it occours, its you who is doing something crazy, since i've been able to generate valid keys for all those saying it's not possible :> Also, if you get this bug, you got an half-generated serial, try replaceing them(the 0x0's) with a random A-Z-char and try to generate again, i can promise u that u will get a correct generated serial. Next time i better don't be drunk doing algos since i don't remember the factors when iam sober :> |
| simonzack Moderator 12. Aug 2008 | there's some code at the end searching for chars in the table, but it seems they are useless Am I wrong??? I made a keygen that can solve if no bugs occur @xvpz: PM sent |
| xvpz Author 05. Oct 2008 | This crackme should be considered solved by simonzack. Tried his solu and it worked with the names i tested. |
You may leave your comment, thoughts and discuss this crackme with other reversers here.
Acting childish will not be tolerated.
HTML and such will be left as-is, so don't try.