I've been trying to create a FCS16 (Frame-Check-Sequence) hashing algorithm, but so far the only explanation I've found is this [URL]and I'm having trouble writing the code.
View 5 RepliesHow can I Implement Drupal 7's Hashing Algorithm into my software so that I can make a database query that allows the user to login? I know that they use SHA-256 bit and they use Base64 encoding and a salt generating algorithm...
View 1 RepliesI know I can MD5 hash a file, but how do I go about using the SHA256 algorithm?
View 6 Repliesi have a file with a serial number in it and i need to check if it is in sequence or not and then print a report stating no errors or if there is errors what line they are on.
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Is there a way to see if a particular frame within the webbrowser control is finished loading? I know the functions webbrowser1.isbusyandebbrowser1.readystate=readystate_complete work for the main window, but it does not work when a frame is loading. It simply keeps saying the page is done loading. The event webbrowser1_documentcompleted sort of works, it registers when my frame has loaded, but it also registers when all the other frames are loaded. Is there a way to just check on the status of one particular frame.
View 2 RepliesI Am working on a sequence checker that will check a list of numbers to make sure they are sequencial? however we now have a new job for a 5 in 1 layout so the serial number i split up over 5 collums and mixed with other data. i can import the data into a data table split by ","'s ?
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I want create my own algorithm
View 1 Repliesi would like to create a fixed size frame for user photos uploaded.
I've tought: i, can create a fixed sized image (200 width x 600 height for example), with my personal frame (top, left, bottom, right element graphics) , and in the center a transparency.
Ok, but i don't know how to merge the photo into the frame and save the new photo format.
how to create a number sequence that always forwarding.. but back to first number again..
for example:
i have determine that number only 0-9
i give an input the 'start' and 'end number'
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I want to create an algorithm or formula that gives me the following combinations below. I have manually printed out all the combinations for the example containing 4 tables with respective values.
This is not permutation because i need the combinations to always follow the unique format [code]...
I've been looking for a way to create a launch sequence that runs the program while simultaneously minimizing the IDE to the tray.I've been unable to find even a discussion on such.
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I can access a specific frame and put the frame into a bitmap so that I can process the bitmap.
Write a function that will take one integer input parameter, create a sequence of numbers stored in an array from 0 to that number, and the numbers are a summation. For example, given 7
View 17 RepliesHow would I "create" an algorithm and get it to encode text in a textbox?
View 3 RepliesI am trying to implement an Algorithm called "Diamond-Square Algorithm" I am having trouble ending it so that it retiurns the required result. So far I have the folloiwng.
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public static string CalculateSHA1(string text, Encoding enc)
{
byte[] buffer = enc.GetBytes(text);
SHA1CryptoServiceProvider cryptoTransformSHA1 = new SHA1CryptoServiceProvider();
[code]....
VStudio keeps yelling at me for just what I have so far most specifically the bracket at the end of Byte?:
Private Sub CalculateSHA1(ByVal text As String, ByVal enc As Encoding)
Dim buffer As Byte[] = enc.GetBytes(text);
End Sub
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 have discovered that the .Net Hashing functions, MD5, SHA1, and SHA512 (all of them probably) do not allow us to create hashes of files greatedr than 2GB in size. If I use a function like the following:
Friend
Function
HashMD5File(ByVal
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I'm trying to teach myself arrays as I have not extensively worked them. So I thought of a basic program to hash the contents of an array and list the output of the array word next to the hash value of it.
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Im trying to make a little login app that connects to my mysql. But I cant figure out how would i salt the password then hash it?
View 5 RepliesI have created an updater for my application. When the application starts the user can launch an updater that will check for the latest version. Download it and copy the files to where the installation is.
Everything works fine.
However, I am looking for a more robust technique. And I have discovered it is better to hash the files on the web server with a hash algorithm and then when they have downloaded use the same hash algorithm to compare the hash values. If they are different either the files were corrupted when downloaded or some modified them without permission.
However, my problem is where do I store the hash values? I was thinking of hashing the files, and storing all the hash values for each file in a text file, and my updater will download that text file.
I am not sure if that is the best technique to use of not? Is this the normal and best way to do this?
how does this function works. How does it copy the frame? HDC BiBlt???
ublic Function copyFrame(ByVal src As PictureBox, ByVal rect As RectangleF) As Bitmap
If isRunning Then
Dim srcPic As Graphics = src.CreateGraphics[code].....
the above function is called from the below command which is in a timer event. mycam is a class including the copy frame function.
bm2 = myCam.copyFrame(PictureBox1, New RectangleF(0, 0, PictureBox1.Width, PictureBox1.Height))
I want to perform two hashing operations concurrently on a single file, without reading the file twice. Is there some way to share the FileStream between two synchronized hashing threads? For example:
Dim Stream As New IO.FileStream("...", IO.FileMode.Open)
Dim HashA, HashB As Byte()
Dim A = New System.Threading.Thread(Sub()
[code]....
Maybe some way of caching a stream? Trouble is, I don't want the entire file in memory at once (it could be many gigabytes in size) and I don't want the file read more than once, due to speed issues. I want the file cached only sufficiently to ensure that both threads can work.For example, suppose at some point in time, thread A had read 100k of the file, but thread B had only read 20k of the file. The portion of the file between 20k and 100k should be cached; but then progressively forgotten as thread B catches up. Then again, if thread B is too slow, we might still end up with hundreds of megabytes being cached.Maybe thread A should be made to wait while thread B catches up. Maybe the ReadByte() function of the stream should block for a while if one of the threads is too far behind?
I am writing a macro using excel 2003 to read rows of a excel sheet & perform some task,now before execution I want the user to select for which rows the operation is to be performedo do so I added a form in MACRO & placed a flexgrid on the form which will display the content of the excel sheet. But, I am not able to change a column type to a checkbox where the user can check it to indicate if the operation is to be performed on that row or not.
View 2 RepliesI try to create an auto start up program with a check box in VB.Net 2008.How do I create a check box that when I check the check box and press apply button, the check box will always checked next time I run the program and vice versa? [code]
View 2 RepliesI can get the program to easily, upon startup, look for updates and then install them. I want to have a button that the user can click that will check/install updates.
View 5 RepliesIs it possible to check a location for a file and if a file exists then create a new file (+1) in the file name? For example if there is no test file in the C:Temp folder then create a test.txt file and if there is one there then create C:Temp est1.txt and if there is a C:Temp est1.txt file then create C:Temp est2.txt and so on?
I was thinking
If Not IO.File.Exists("C:Temp est.txt") Then
IO.File.WriteAllLines("C:Temp est.txt" + 1, vbCrLf)
End If
I wont to be able to check if a table exist, if not i wont to create it...
This is the code i use for connecting...
Code Block
I want to create a grid of checkboxes dynamically on my form for example the user may key in 16 which is a 4x4 grid of checkboxes or 81 which is a 9x9 grid.my code seems to be generating the correct values but the checkboxes dont go to the correct location on the form
Public Class Form1
Public NumberOfInputs As Integer = 81
Public CheckBoxArray() As Control
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I can add a folder in the setup/deployment project and it gets added when my project is installed. when I do it by writing code, I get a message "access is denied", but the programme will continue to work. I eventually worked out that I had to right click the exe file (in programfiles) and run as administrator so that the directory is created (as the form loads).
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