I'm trying to find a CRC32 computation algorythm that output data in positive 8-character HEX (like winrar CRC for example).
All algorythms found return a positive/negative integer that I don't know how to handle...
I am trying to generate CRC32 in my program. Unfortunately it works ~70% of the time. Would that mean that my function doesn't take care of some special case correctly? Can someone give it a quick look and let me know if I did an error while converting C code to vb.net ?
[Code]...
I'm encrypting a file with AES using CryptoStream. I'm also creating a CRC32 hash of the original file data. Later I need to decrypt the file and create a CRC32 hash of the decrypted data, in order to check if the decrypted file is 100% the same as the original file.
This is a part of the encryption routine. I'm reading a file in chunks and writing them encrypted to a new file. At the same time I'm creating a CRC32 hash of the chunks of data, which will give me the CRC32 hash of the entire file in the end. This works fine.
vb.net
'// Create the CryptoStream
Dim Crypto_Stream As New CryptoStream(FS, crypto_transform, CryptoStreamMode.Write)
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I need change this code to calculate crc16 form file, I found on net only this example. My actualy knowledge in programming is totaly green.
Public Shared Function GetCRC32(ByVal sFileName As String) As String
Try
Dim FS As FileStream = New FileStream(sFileName, FileMode.Open, FileAccess.Read, FileShare.Read, 8192)
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I am retrieving lists of crc32 hashes that contain names of files, not there contents.I need to be able to decrypt the strings which are hashed names like "vacationplans_2010.txt" which are less then 25 characters long.
View 3 RepliesI want my program the be able to calculate the CRC32 of a file and to change it. I already have the CRC32 calculation class now I wanna know how to make it change the value.
CRC32 calculation class:
Code:
Private crc32Table() As Integer
Private Const BUFFER_SIZE As Integer = 1024I
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I am making a program for a game to change the textures. But when you edit an image file(the texture) it will change CRC32 and the game will notice you changed it so if you start the game the texture will just become grey. So what I want is that you can change the CRC32 code back to the old one that the game wil recognize and the texture won't turn grey. Now I found the CRC32 calculation on the internet but I can't figure out how to change it to the code you want.The CRC32 calculation class:
Option Explicit On
Option Strict On
<System.Diagnostics.DebuggerStepThrough()> _
[code]....
i have a scanner set up which scans .bin and .iso files and returns the crc32 checksums (then displays various info based of that etc)
Im looking into adding support for .rar and .zip files, so the end user wont have to extract there files to scan them, how ever that adds to many variable for the crc32's based of what each persons compression is etc. So what about scanning the file inside of the rar/zip file.
So would it be possible to scan a rar or zip file, and get the crc32 of the .iso/.bin located within that archive?
in the current project im making i've decided to add in some tools, 1 of which is a renamer based of a renamer app that already exists (called scdtoolz), i want to build my own version of it so i can learn some new things, and build a nice GUI version of it.[code]So what i have managed to determine is that the current app scans the folders contents for the CRC32 Checksum, and renames based of that, since the 456.bin's CRC32 Checksum was 2274F80B, and in the text file 2274F80B is found here 'WWF - Rage in the Cage (T-81015)(U)#2274F80B#'So now i have determined game identification is based of the CRC32 checksums, how would i go about coding a similar ap in vb.net?first i need to make the app scan a folder, but how to return crcchecksum? and then rename if check = XXXX? If MD4 sums are easier/simpler i can use those instead, im lookin at a few hash app sources now, so i think i can see how to get the md5 but not the crc32 yet, or how to rename the 2 files and folder based of the text file.
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