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.
Working on a Sudoku program and I want to read a puzzle in from a file. So, I read the file in as a string in the form --3-2--1- and so on, where - means nothing starts in that cell. How do you convert a string to a short? I found the cshort function but it doesn't seem to work. Is there a different way or am I making some other mistake?
SudokuPuzzle is a string where I read in the file. squareValue(i,j) is the number is the ith row, jth column position of a correct solution I used 1 to 9, 1 to 9 as the indices for my puzzle (and just ignore the 0, though I did Dim as (0 to 9, 0 to 9)), so that is why I have the i - 1 and j - 1 in there.
For i = 1 To 9 For j = 1 To 9 If SudokuPuzzle.Substring(9 * (i - 1) + j - 1) <> "-" Then squareValue(i, j) = CShort(SudokuPuzzle.Substring(9 * (i - 1) + j - 1)) End If Next Next
i need a standard way of encrypting a string and decrypting it using AES. I am aware of the Cryptography class, however almost every example creates a class to do the encryption,If .Net already has this implemented and ready to use why would we create classes for encryption and decryption, isn't it as simple as calling the encrypt method of the class or decrpyt and passing in the text. Unless everyone is wanting to centralize the code. But even then i see so many different examples from File,Data Protection etc..
There is a problem with the source code. I cannot convert the string to decrypt from encrypt string.[code]I went on breakpoint on that line and I have looked on quickwatch. The error I have caught is that convert is a type and cannot be used as an expression.
how to encrypt / decrypt a string in VB.Net.I followed the example given here and wrote the following code (below). There's a text box, an "encrypt" button, and a "decrypt" button. The idea is to type something into the text box ("like 'hello world'"), click "encrypt", and see the encrypted version appear in the text box. Clicking "decrypt" should then take you back to the original string.
But when I try to encrypt I get an error when I try to "FlushFinalBlock". The error is: "Length of the data to encrypt is invalid".The "decrypt" part is a total shot in the dark, as the example quoted above only deals with encryption, not decryption. I'm sure it's wrong, but since I can't get "encrypt" to work I haven't tested it yet.
Imports System.Data.SqlClient Imports System.IO Imports System.Security.Cryptography Public Class Form1
In my project I need to use a 190 very long strings with different number of characters (4-60).I want to mark them in a short form with the numbers 001, 002, 003 ... 190. Is there an easy way to display the full name of the string when I choose a short name ? Of course, I do not want to write 190 times "if - end if" and also I would like to avoid a complicated database. Onenew Visual Studio 2010
i have found a few encrypt/decrypt tutorials online but either they dont work or they only work when the application is running so if i encrypt a string using some code i find and save it (in its encrypted form) and then restart the application and enter the saved encrypted string into a textbox and run the decrypt code it wont decrypt it. i don't understand why en/de-cryption is so hard or why there are so little working examples online. could someone be so kind and show me some code that can let me en/de-crypt a string even if i restart the application or use it on a different computer? and doesn't show the weak key errors all the time.
I want to encrypt all users' password that stored in database, but also i need to able to decrypt them.How can i do that?Because i try using MD5 method and only get one way ticket
I have been having some problems trying to decrypt the string returned back from SagePay.I used their asp.net kit which included the encrypt and decrypt functions using base64 - sending the information to SagePay is not a problem but I am having a number of problems trying to descrypt the string.Here is the function I am using to descypt:
Private Function base64Decode(ByVal strEncoded As String) As String Dim iRealLength As Integer Dim strReturn As String Dim iBy4 As Integer
[code]....
I don't think the web server is trying to encode anything as there are no + symbols within the url string and I have just glanced over the two to compair they are the same.This returns a blank string whereas when I use the sections commented out in the first loop i get a really weired string back and when I use their simpleXor function it just returns complete nonsense.
I recently have been developing a app that uses the rijndael encrypt and decrypt function it stores dates in the registry (encrypted with a key using the algorithm)
for example Dim strOldDay As String = Key.GetValue("UserSettings", "").ToString the key was made using a private function called "createkeys"
example: dim current as currentdate Current.Day = DateTime.Now.Day.ToString Current.Day = Encrypt(pPassPhrase, Current.Day)
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 ?
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)
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)
I 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
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()> _
I need to send a short string, (less than 30 bytes, but sent every second), from one VB application, to a Delphi application.. is this possible, using CopyDataStruct, WM_COPYDATA and SendMessage functions in Windows?
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?
I am attempting to find some code to use in VB.NET to decrypt a string that has been encrypted using the Java crypto libary.All of the code I have found so far uses an Initialisation Vector and Key to decrypt but the string has been encrypted using the Key only. (Using an Initialisation Vector is apperently an optional step in Java).Does anyone know of code that I can use (preferably in VB.NET but i could convert C#) to decrypt AES 128 Bit encoded string without an Initialisation Vector?
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.
In VB.NET: If varShort is a Short and varBit is a value from 0 to 15, how can I set the bit in varShort identified by varBit without disturbing any of the other bits in varShort? My problem, of course, is with the most significant bit, bit 15. Since varBit is determined at runtime
[code]'when i enter 'Q' key output(textbox1.text) = 'qQ' how Show Q only''' 'and how i can set multi shortkey output = CTRL+TAB+CAPS LOCK,and bla bla , and send to Timer1' End Sub.[code]