del86's D31-KeyMe #2
| Download D31-KM#2.zip, 7 kb (password: crackmes.de) Browse contents of D31-KM#2.zip Hi All
Difficulty: 4 - Needs special knowledge | Send a message to del86 » View profile of del86 » |
Solutions
Solution by lithium, published 17. may, 2007; download (35 kb), password: crackmes.de or browse.
lithium has rated this crackme as quite nice.
Discussion and comments
| Ox87k 23. Jan 2007 | Well, i've some problem with base64. I don't understand why in ur crackme the base64 of 1234567 is "MTIzNG==" while in my keygen it is "MTIzND==". However i rip ur base64 routine and it not works yet, always "MTIzND==". Maybe a little bug? Maybe i'm wrong? Really don't know.. :| |
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| Crosys 23. Jan 2007 | ox, its because the crackme take the name as 4 chars in the base64.. look at the arguments.. crackme looks very easy btw, gonna keygen whole thing later on.. |
| Ox87k 23. Jan 2007 | i know that Crosys :) I think the problem is something else.. |
| Guetta 23. Jan 2007 | Yep, founded it, it's coz of the four chars of our name are stucked to "i4" string, and the base64 ecnryption of the CME use this "i4" in the encryption, so the last byte before "=" is changed. Little bug. I'm gonna keygen it using the bug. |
| del86 Author 24. Jan 2007 | Yes Crackme is easy, but not for beginners Ox87k good keygen, fast work -) Ox87k: "Maybe a little bug?" - Maybe, maybe ;-) Hm.. I mark this keygenme as "level 3 difficulty" |
| Guetta 24. Jan 2007 | Okay, keygen done, but's it's not a level 4 or 3, I thinks it's a level 2. |
| Crosys 26. Jan 2007 | Agree with Guetta, very ease |
| red477 27. Jan 2007 | @Ox87k : got it. when calculating base64 of the first 4 char of name, the chars immediately after the 4 chars must be exactly the same as in the crackme. |
| Guetta 27. Jan 2007 | red477, I've already said it in my message, the chars immediately after the 4 chars of our name are "i4". |
| red477 28. Jan 2007 | @Guetta: thanks:) got it. |
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