w02057's Newbie-Level1
| Download Newbie-Level1_by_w02057.zip, 407 kb (password: crackmes.de) Browse contents of Newbie-Level1_by_w02057.zip <<--Overview-->>
Difficulty: 1 - Very easy, for newbies | Send a message to w02057 » View profile of w02057 » |
Solutions
Solution by fArse, published 11. jul, 2008; download (2 kb), password: crackmes.de or browse.
fArse has not rated this crackme yet.
Solution by born2c0de, published 04. jun, 2008; download (34 kb), password: crackmes.de or browse.
born2c0de has rated this crackme as awesome.
Discussion and comments
| obnoxious 30. May 2008 | i'll leave it for the newbies. in the mean time i'll upload the solution to your crackme#1 |
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| costy 31. May 2008 | SHA1CryptoServiceProvider waht is this?? |
| obnoxious 31. May 2008 | @costy sha1 cryptoserviveprovider is similar to md5 cryptoserviveprovider. they are necessary in finding the sha1 and md5 hashes. |
| MulleDK13 31. May 2008 | Ya, it was easy :) I wrote a keygen in 5 minutes (C#) |
| born2c0de 01. Jun 2008 | Solution submitted. Awaiting Approval. Interesting Algorithm. |
| k3nny 01. Jun 2008 | All this for a small seriel number .. :-) |
| costy 03. Jun 2008 | i cannot make it. the problem is i usually code in visual basic .net I don't know how to use SHA1cryptoserviveprovider. (i had the same problem with md5cryptoserviceprovider). I have always to give up when i find a crackme written with this instruction becouse i cannot code it with visual studio. The great problem is that people usually write keygen in c#. So i cannot learn how to bypass this problem. So can anyone help me?? For example... How I can generate the md5 or the sha1 code of the string "hello"?? I hope that someone will help me. |
| TiGa 03. Jun 2008 | This is not the first crackme that uses MD5. You can always search for other crackmes that used it and read the solutions. |
| costy 03. Jun 2008 | yes TiGa... but the keygen in other solution is made with C#. I would like to know how to do it in vb .net |
| w02057 Author 04. Jun 2008 | Here costy; Private Function md5(ByVal sInput As String) Dim md5Obj As New Security.Cryptography.MD5CryptoServiceProvider Dim sBytes() As Byte sBytes = System.Text.Encoding.ASCII.GetBytes(sInput) sBytes = md5Obj.ComputeHash(sBytes) Dim sOutput As String = "" For Each b As Byte In sBytes sOutput += b.ToString("x2") Next Return sOutput End Function You input the string to encrypt in md5 as sInput, and it will convert it to byte form, encrypt each byte, then reconstruct the bytes to a string. sOutput is then returned, which is the md5 version of sInput So to use this to encrypt "hello", just run md5("hello") and it will return its hash. Hope this helps, |
| costy 04. Jun 2008 | yes, a great help! a also have written this routine. Aproximatly identical to your routine. It calculate sha1. :-) Private Function sha1(ByVal sInput As String) Dim md5Obj As New Security.Cryptography.SHA1CryptoServiceProvider Dim sBytes() As Byte sBytes = System.Text.Encoding.ASCII.GetBytes(sInput) sBytes = md5Obj.ComputeHash(sBytes) Dim sOutput As String = "" For Each b As Byte In sBytes sOutput += b.ToString("x2") Next Return sOutput End Function |
| w02057 Author 04. Jun 2008 | you might want to change the md5Obj variable to sha1Obj, lol! :) |
| costy 06. Jun 2008 | yes... it should be better! But it works because the variable name isn't not so important. |
| erudite 06. Jun 2008 | Submitted solution for anyone who may prefer a solution written in C#. (Not a VB man myself). Algorithm seemed a little over-elaborate for a base newbie crackme, but who am I to say? By the way, remembering null-base versus 1-base indices is a tricky proposition at times. |
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