How To Secure A File That Generate With A Service
Apr 12, 2010
I am programming a service for a company that will log valuable performance data on machines that they lease out to other companies. It is critical for them that this information is as safe as possible and that it can only be read by us (a program created by us that is). I already made a trippledes encryptor that works fine but i still have the issue that a person can delete or move or corrupt the file if he somehow manages to get out of the operation software and gain acces to it.So my question is: Can i lockdown a file and make it as good as impossible to change the file or delete it other then by being the admin or the program that is generating them?
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Apr 10, 2012
i wanna generate an HTPASSWD file for my Server to secure a directory. For Crypt im using DesEncrypt Method , here is my Code :
[Code]...
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Dec 2, 2009
I am going to be creating a web service that will be passing confidential information across the network.
What would be the best way to secure the web service? how do I know if the application requesting the information is who it says it is, and it's not another application that is using another's user name and password?
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May 10, 2012
WinFormsApp Login passes information to .php (server based) Login (provided credentials are correct) to DB to retrieve Decryption Key. WinFormsApp then uses Decryption key on Hardcoded encrypted connection string and renders application usable.This would then eliminate the necessity to encrypt/decrypt a connection string at runtime, virtually rendering any unauthorized person with a useless software.
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Jul 2, 2011
I simply want to speed up web services so the first call does not take 8-10 seconds, while the subsequent calls take a half a second. I have learned that the Generate Serialization Assemblies option in Visual Studio does not actually use sgen to generate the dll. So I used sgen with the dll my web service uses to create the MyWebService.XmlSerializers.dll file, and it did create it. So then I placed onto the server. I still have the same speed problem. Do I have to place something in the config file to tell it to use this? Do I have to learn all sorts of parameters with sgen to make sure I set it up properly?
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Feb 5, 2009
My application runs on a "server" machine and provides files (10megs - 100megs each) to 8 other computers. Currently this is done using a standard shared folder on all 8 computers and the server simply copies the file to \ComputerNameSharedFolder - and everything is great.However, due to new policies we need to remove all shared folders, so using a simple \ComputerNameSharedFolder is no longer feasible. Therefore I need to find a way for my application to be able to share these files in a safe, secure, and compliant way.There has been talk of using sFTP which would require each system to have an sFTP server running at all times (controlled by the application somehow), or also SSL was talked about as it can be integrated into the application easily, etc...
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May 9, 2010
I am trying to download a file from a secure website but I don't know how to do it becuase it gives me the error. Can not establish trust relationship for the SSL/TLS secure channel.
[code]...
My problem is that I can't set the credentials before I have to assign the variable the value so it throws an error.
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Oct 11, 2009
Im creating a program that stores usernames/passwords for different devices which will require a login to get into the program but I need to save the usernames/passwords somewhere. Is there a more secure way to store this than in a text file? Or I could try encryption which could be quite fun.
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Feb 4, 2012
How to secure App.config file. As it contains all the passwords that connections use so any body can see the data in my databases. If we donot save the password at the time of making connection string, will it still be able to connect with the DB the same way?
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Feb 26, 2010
I was looking online for a application that can delete a file more secure then. Kill(C: est.txt")Then i had a thought.Maybe i can make my own.Is it possible to make a secure file deleter in vb.net or should i look into C++
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Nov 30, 2009
What would be the best way to input the password when uploading a file to FTP? The file gets uploaded behind the scenes without the user inputting any details (the username + password gets used)
So far I've used the network.upload method but the password is in plain text and obviously readable. I need to upload the file without anyone obtaining the password when doing so, would obtaining the password from a mysql database or some sort of encryption be better?
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Jul 30, 2010
I have a program that logs into a secure site, looks on the user's home page to find a list of links to reports that can be downloaded and then selects each one - this is currently a manual process but with 100 reports a time it takes a while. The idea is that all the reports will download to a specified folder with generic names so the user can play with them on their own computer rather than having to search through them online.
Anyway, everything's gone well as far as using a WebBrowser to connect to the site, log in and get the list of URLs however it falls down when it tries to link to them. I have tried two methods:
1 - Navigating straight to the URL, this gives an error message every time (asking me to try again)
2 - Directly downloading the URL with a WebRequest class (below) however this doesn't download the actual file, but rather a copy of the login page.
Current Code:
Public Sub DownFile(ByVal sFile As String, ByVal sRemoteUrl As String)
Dim wr As HttpWebRequest
Dim ws As HttpWebResponse
[Code].....
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Oct 4, 2011
I am writing a program that acceses a file in VB/Visual Studio 2008 on Win7 and running it as a user who has admin credentials. I am opening the file with the following code:
Dim Input As New FileStream("C:FileTest est.txt", FileMode.Append, FileAccess.Write, FileShare.None) To test to make sure I can't access this file, I tried to open it with Notepad and I was able to and got no errors. I wrote a new value using Notepad and even saved it and I didn't get any errors form Notepad or my VB program.
I then went on and treid to open the same file twice from my VB program as:
Dim Input As New FileStream("C:FileTest est.txt", FileMode.Append, FileAccess.Write, FileShare.None)
Dim Input2 As New FileStream("C:FileTest est.txt", FileMode., FileAccess.Read, FileShare.None)
And I receivded an error in my VB program as expected. So the FileShare.None switch kind of works. Although I was still able to open the file with Notepad while my VB program had it open. I was aslo able to open Windows Explorer and reame it and even delte it while my VB program had it "open", in the write mode no less without my VB program knowing anything about it.
Why are other applications able to ignore the FileShare.None switch? Seems pretty useless if that's the case. And a huge secruity problem
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May 6, 2011
This is the Download file code which is 100% working when i will give directlink of file
And in this case progress bar is not working anymore and program hangs too let me know what is the problem with above code and how i will correct it
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Jul 14, 2011
i have a Windows service that is hosting a WCF service through net.tcp and this is working great. I have also created a WCF service application. I am trying to add the net.tcp service reference to the service application. Then I add it to the GAC that goes ok but if I try to RegAsm the WCF service application to allow it to be called from Server.CreateObject I get the error:
Warning: Type library exporter encountered a type that derives from a
generic class and is not marked as
[ClassInterface(ClassInterfaceType.None)]. Class interfaces cannot be
exposed for such types. Consider marking the type with
[ClassInterface(ClassInterfaceType.None)] and exposing an explicit
interface as the default interface to COM using the
ComDefaultInterface attribute.
It does not work. I have tried to call it through a class library but this does not work either as the end point is not set correctly.
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Aug 24, 2009
i would like to generate a very simple report with some images and text and i am wondering if there is a way to generate a pdf file with vb.net?
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Feb 3, 2010
I have a VB2008 application which can control a windows service i.e. start, stop, pause etc. This runs ok on a Windows XP machine but not on a Win 7 machine (message is - Service error cannot open <service name> service on computer '.') ( if I stop the UAC then it runs ok ). It seems to be a rights issue,
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Feb 24, 2012
I have created a program that merges files and I have decided to output the results as an HTML document so that it is legible. I have achieved this output using System.IO.StreamWriter and creating a textfile with all the html formatting and in-line CSS and saving it with the .html extension like so:
[Code]...
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Mar 19, 2011
how do I generate a .txt file containing such string?
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Nov 16, 2011
I would like to generate a .jpg file by using vb.net desktop application. Example: the program will paint a simple rectangle with grey color, and produce as a physical image file (.jpg).
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Mar 23, 2011
The problem is that it only adds to the text file it's suppose to read from, but instead of adding 4 strings into my listbox. Can someone figure out what's wrong with my code, and provide me the correct syntax for it. This is in a sub after click of a button in vb.2008.
[code]...
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Dec 10, 2011
Example :
If a got word "don" then file will contain
ddd
ddo
[code].....
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Jan 7, 2010
I would like to generate a static URL based on a few parameters.The page serve the file for downloading is called CertificateDownload.aspx ,I am generating the download link in Report.aspx.These 2 files reside on the same physical folder.I do not like the replace method ,but I could not think of another way of doing it.How can I improve my code or what is a better way of doing it.
I need the absolute url to be displayed as text in the web browser.[code]...
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May 26, 2011
I'm trying to generate an MD5 and SHA1 hash value for a given file with the following:
Imports System
Imports System.IO
Imports System.Security.Cryptography
Imports System.Text
[Code]...
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Oct 13, 2011
I am in search of a way to access a files thumbnail preview and push it to a picturebox on my form. I have the code below that works for jpg files, however it does not work for say a word document's thubnail. displaying the word documents thumbnail in a picturebox would be great!
Dim myBitmap As New Bitmap("C:Doc1.doc", True)
Dim myThumbnail As Image = myBitmap.GetThumbnailImage(40, 40, myCallback, IntPtr.Zero)
PictureBox1.Image = myThumbnail
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Jan 18, 2010
I am writing a windows desktop application in visual basic and I need it to connect to a SQL database, take a rows unique id, and using that number generate a file from the binary data that is stored in the SQL database and save it to a file directory. The part that is hanging me up is the creating the file from the binary SQL data.
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Apr 30, 2012
I need assistance generating a xml file by reading values from an array of structs.
my struct looks like this:
public structure myStruct
dim ID as int
dim myArray1 as boolean
dim myArray2 as boolean
dim myArray3 as boolean
dim x as int
dim y as int
I have several instances of these structs. I also have universal variables that are declared outside of the structs. I am looking to generate a xml file like this:
[Code]...
But how would I assign the values of each element by reading them in from the struct? Or do I need to use the XmlSerializer Class instead?
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Jan 29, 2009
Do anyone know how to create a .exe file from my vb.net project? I do not want the one in the /bin folder. This is because i want it to be able to run my application from a single EXE file.
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Feb 19, 2011
I want to know if it is possible to generate a php file depending on selection on a win form in vb.net 2010. If so, does anyone has a link to a sample.
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Jun 7, 2011
am currently writing a program that uses multiple scripts we use to diagnose software we use in our environment. Currently, the only we retrieve our information is going to the local machine, and running the script locally, and retrieving the output results. The script is an batch file.The goal of the program I am currently creating is to automate the process by specifying which machines need to have the script ran on, generating the script, dispatching it, executing it, and retrieving the output results from the machine the program is ran on...
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