Building a C# Chat Client and Server
A step by step tutorial teaching you how to create your own chat client and chat server easily in C#, for local networks or the Internet.
Getting Hard Drive Information
A C# tutorial showing you how to make use of WMI to extract information on disk drives, such as model, capacity, sectors and serial number.
UPS Shipping Calculator
This tutorial will teach you how to calculate the shipping cost based on the weight, height, length and depth of the box, the distance and the UPS service type.
Create Your Own Rich Text Editor
Creating a Rich Text Editor using JavaScript is easier to do than you might think, thanks to the support of modern browsers; this tutorial will walk you through it.
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.NET Security Newsgroups
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Password For Certificate
I'm trying to talk to a webservice that requires a certificate. I have generated a .CER file using certmgr. My code looks like this: ServicePointManager.ServerCertificateValidationCallback...
| On Thursday, October 1st 2009 at 06:14 AM by Anonymous | 2 Replies |
Invalid Signature When Sign A PDF With ITextSharp And CSP Private
Hi, I am a java programmer trying to do something with c# .net, in this case i am trying to sign multiple pdf files using iTextSharp. This is the code: public void sign() {...
| On Thursday, September 17th 2009 at 12:39 PM by Juan | No Replies |
How To Tell Windows To Trust A Mapped Drive
I'm running Win7 RC in a Virtual PC window. I have shared the My Documents folder from the host PC with the Virtual PC. Problem: Windows 7 doesn't trust it. This is causing me a bunch of problems...
| On Wednesday, May 20th 2009 at 10:48 AM by daveh551 | No Replies |
Is There A X509EncodedKeySpec / KeyFactory For C# ???
I am porting a Java app to C#. In my application I load a public key from a DER file (see below): final byte bytes[] = load( path + "/PublicKey.dat" ); X509EncodedKeySpec...
| On Tuesday, May 19th 2009 at 12:54 PM by romero68@gmail.com | No Replies |
Firewall Error Messgae
After my system boots up and is ready I will get an error message stating my system is not secure and I need to turn on my firewall...well according to the settings it is on and has not been changed...
| On Monday, May 11th 2009 at 08:09 PM by Anonymous | No Replies |
SslStream And AES 128 Cipher
I am having problems connecting to a specific SSL server. The server only supports AES 128, but the .NET 2.0 SslStream class doesn't seem to support it (although the CipherAlgorithmType enum has the...
| On Friday, May 1st 2009 at 02:58 PM by Anonymous | 2 Replies |
Windows Live One Care Installation
I am receiving this message every time I try to install Windows live One Care weather I use open or save it to my Documents, this is the free trial version The procedure entry point in attach console...
| On Thursday, April 30th 2009 at 10:21 PM by Anonymous | No Replies |
Sharepoint Security
I am running Sharepoint on a windows 2003 box. When attempting to add a user through the api, I get the following error: Attempted to perform an unauthorized operation Everything is running on...
| On Tuesday, April 28th 2009 at 07:20 PM by Anonymous | No Replies |
How To Decipher Data In .NET Using "RSA/ECB/PKCS1Padding"?
Hi, I am receiving RSA encrypted data with the digital signature. The data and signature is encrypted in Java using RSA Public key encryption. I have to verify the signature in C#.NET and decrypt...
| On Wednesday, April 22nd 2009 at 05:54 AM by Ajay Jadhav | No Replies |
Display Certificates Details Dialog By Code,...
Hi, i do have a Autheticode signed Exe File and i would like to display the Certificate Property Dialog as it can be displayed from within the File Property TabPage "DigitaDl Signature". What is...
| On Monday, March 2nd 2009 at 04:59 PM by =?iso-8859-1?B?S2VyZW0gR/xtcvxrY/w=?= | 1 Reply |
Selecting Specific Certificate For Verifying My Exe.
hi...i got a trial certificate from ascertia online. m using vs 2003 on xp platform and capicom 2.1.i had a security warning problem before this error but now the problem is solved.now i want that...
| On Friday, February 27th 2009 at 03:09 AM by Anonymous | No Replies |
HttpWebRequest Fails When Run As Non-Admin Account On Vista
When I run the code below on Vista 32 (or 64) with a non admin account it fails. On Vista, as Adminit works with no problems. On XP it works with no problem as admin or non-admin. Please Help...
| On Thursday, February 26th 2009 at 09:08 PM by Anonymous | 1 Reply |
Cryptographic Streaming
This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C98D4B.078F3860 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, What...
| On Thursday, February 12th 2009 at 08:49 PM by Dmitry Nogin | 1 Reply |
DEP Compliance
I have a C# .Net application (both an EXE and a DLL) that I want to make DEP compliant. I have been searching for instructions of how to do this, and I just keep coming up empty. My application...
| On Thursday, February 12th 2009 at 12:07 PM by Anonymous | No Replies |
Problem Authenticating Against Renamed Active Directory Account
I've got a web (intranet) application that uses windows authentication. Once a user has connected the applicaiton picks up their username and looks up details in a database using the username as a...
| On Tuesday, February 10th 2009 at 11:44 AM by Alan Lambert | 2 Replies |
Authenticate User Using App From A Windows 2000 Machine.
Hi, I've created an app that runs off an unc share. The problem is when a user accesses this from a windows 2000 machine it throws a security exception. On xp machines it works fine. I researched...
| On Monday, February 9th 2009 at 03:54 AM by deostroll | No Replies |
Unable To Access "Cookie" Folder
Hi, I have written a small program, sort of web crawler. The program uses cookies. When I run the program from VS08, it runs fine. However, when I run the standalone application it abort with an...
| On Thursday, February 5th 2009 at 09:37 PM by Gugale at Lincoln | No Replies |
Default Certificate Could Not Be Created.
I have a vb program that uses a trusted connection to go into a 2003 server with a Microsoft SQL DB. The progran was compiled in Visual Studio 2005. I can build the program copy it to another PC in...
| On Thursday, February 5th 2009 at 04:21 PM by Anonymous | No Replies |
Single Sign On Using NTLM
Hi to all, we have a proprietary client and server application (client and server both written in C# for .NET 2.0) that is using a TCP/IP-Connection for communication with a custom protocol....
| On Monday, January 19th 2009 at 02:36 PM by Stefan | 1 Reply |
Problem Accesing To A Folder In Another Machine
Hi everybody. I've made an asp.net application to obtain pdf's. These pdf's are contained in a remote server. Both machines are in the same domain. I give permission for the pdf's folder to every...
| On Thursday, January 15th 2009 at 06:51 AM by Sergio Palac?n | No Replies |
SSL Stream Design
Hi All, I am designing an Ssl Client app and have a query on the design. The app communicates with a remote Server using a TCPClient object over an SslStream. The connection is open for a number...
| On Monday, January 12th 2009 at 08:03 PM by Anonymous | No Replies |
Accessing A Password Protected Folder From A New Parallel Installa
I recently had to perform a Parallel Install of XP because my original install was corrupt and could not be repaired any other way. Now I have a folder that has a password on it and I am unable to...
| On Sunday, January 11th 2009 at 12:06 AM by Anonymous | No Replies |
Crypto - Help - Cannot Persist RSA Keys VS2008/Net 3.5
Hi, Could anyone advise as to why I am unable to persist RSA keys in a container? If I run this function, encoded() is filled with the same values on every execution; yet encrypted() is...
| On Wednesday, November 5th 2008 at 02:46 PM by Robert Ellis | No Replies |
SignedCms.ComputeSignature() Throws CryptographicException On Vista Business Edition
Hi, I am facing a problem calling ComputeSignature() method of SignedCms class on Vista BE. This function is working fine on Windows XP Professional SP2 with .net framework 2.0. The signing key which...
| On Monday, November 3rd 2008 at 12:43 PM by Hashim Saleem | No Replies |
SignedCms.ComputeSignature() Throws CryptographicException On Vista Business Edition
Hi, I am facing a problem calling ComputeSignature() method of SignedCms class on Vista BE. This function is working fine on Windows XP Professional SP2 with .net framework 2.0. The signing key...
| On Monday, November 3rd 2008 at 12:15 PM by Hashim Saleem | No Replies |
Computing A Hash With The Managed SHA Providers
I am wondering if the managed SHA providers use a machine key for computing a hash like the FormsAuthentication.HashPasswordForStoringInConfigFile does. I am pretty sure that I read somewhere that...
| On Saturday, November 1st 2008 at 10:14 AM by Anonymous | 1 Reply |
Live One Care
When I try to update my virus and spyware protection from One Care, I am unable to see any indication that anything is downloading. I click, Update, and have waited a few minutes, to several hours...
| On Wednesday, October 29th 2008 at 02:02 AM by Anonymous | No Replies |
Windows Defender Out Of Date???
In my security centre it says that windows defender is out of date yet when i click on 'Update now' it says no new updates are available. I also have Bullguard running on my computer, is this giving...
| On Thursday, September 18th 2008 at 06:57 PM by Anonymous | 1 Reply |
Could Someone Please Explain Windows Security Or Point To A Web Si
I've been working on mainframes for 30+ years and therefore understand their security which basically comes donw to " If I have a userid and password for a mainframe system I can logon and access...
| On Monday, September 15th 2008 at 06:51 PM by Anonymous | No Replies |
Added Path To .Net Exe Prevents Affects Security.
Hello all, I have a .Net application (2.0) installed on my network drive in a directory x:\tmp\test I have done the necessary nonsense to allow .Net assemblies to be executed from a network drive...
| On Friday, September 5th 2008 at 07:20 AM by JohnD | 1 Reply |
Secure Method Calls Question
Hi; This is driving me nuts, can anyone help me? I have a "special" requirement that only certain methods from certain classes can only be invoked from certain web apps (on our intranet). Othwerwise...
| On Thursday, September 4th 2008 at 12:06 PM by vbilopav@gmail.com | 1 Reply |
Use RSACryptoServiceProvider For Encryption And Let OpenSSL Decryp
I want to write a .NET client that sends an encrypted message to a server written in C with OpenSSL, and decrypt the message there. I use RSA with PKCS1 padding. The client uses a public key generated...
| On Wednesday, September 3rd 2008 at 06:55 AM by Anonymous | No Replies |
Active Directory User Audit
I have a 2003 Active Directory system with about 3000 users. I need to validate when the last time a user authenticated to any network resource. My goal is to poll for all users in the directory and...
| On Thursday, August 28th 2008 at 03:57 PM by Anonymous | 3 Replies |
ISA 2004 & Firewall Cilent
Hi, I installed ISA 2004 to a windows 2003 machine. Also, I installed Firewall client for ISA server to a Vista machine (latest version). The Vista machine can connect to Internet successfully....
| On Wednesday, August 27th 2008 at 10:38 AM by Anonymous | No Replies |
Signtool Error Message
When I try to digitally sign a file (jpg, exe, etc.) it appears the following error: SignTool Error: This file format cannot be signed because it is not recognized This means that there is an...
| On Friday, August 22nd 2008 at 06:44 AM by Anonymous | No Replies |
Fictitious Firewall Update E-mail
I've received 3 e-mails notifying me of my MS Firewall redundancy. I can't see any id stamping in the mail. Do I assume that it is an attempt by the party to access my machine? MS make it impossible...
| On Thursday, August 21st 2008 at 05:29 PM by Anonymous | No Replies |
Console Application Alternate Windows Credentials
I have a windows console application written in .NET 1.1 that I want to launch from the Windows Scheduler on Windows Server 2003. I want to be able to progamatically specify the account and password...
| On Monday, August 18th 2008 at 09:37 AM by Andy | No Replies |
Windows User Controls Into IE: Security Problem To Register DLL
Hi, I=B4m trying to use winform control into a webpage aspx . I follow the step of this link to do it. http://www.15seconds.com/issue/03= 0610.htm. In my case my user control it=B4s simple button...
| On Monday, August 18th 2008 at 07:51 AM by Tonito | 1 Reply |
Can't Execute ZIP
Hello, I have an application that I need to install on my PC. The vendor is helping me and FTPed the zip file to my desktop. When I try to extract it, I get the error "Access to FILENAME.ZIP was...
| On Sunday, August 17th 2008 at 11:05 PM by Anonymous | No Replies |
Get Information About Signature From Signed File
Hello! I'm trying to get info from signed file in Visual Basic 2005. Although it's possible to get basic infos (eg. Version) I haven't found how to programically retrieve informations about signer...
| On Thursday, August 14th 2008 at 05:38 PM by Anonymous | 1 Reply |
CRLValidityExtensionPeriod
I'm trying to extend the validity of a CRL (for Windows Smartcard Logon) by modifying the registry as mentionned in this article (http://support.microsoft.com/kb/887578/en-us). It seems to work...
| On Tuesday, August 12th 2008 at 09:17 AM by Anonymous | No Replies |
XP Security Center
Hello, I'have read about Windows security center and it seems that, when you get an spyware virus it changes to "XP Security Center", is that true ? Also, when I try to uninstall it disappears, but...
| On Monday, August 11th 2008 at 09:28 PM by Anonymous | 1 Reply |
CRL Extension Period
I'm trying to implement registry keys as mentionned in this article (http://support.microsoft.com/kb/887578/en-us). It seems to work on the server side (w2003 SP2), but not on the client side (XP...
| On Monday, August 11th 2008 at 06:55 AM by Anonymous | No Replies |
Random Behaviour Accessing A Share
Hi there, I have a C# Windows Service project that is checking a network share for new files and processing any that are found. The share has been given Full Control to the group Everyone...
| On Tuesday, August 5th 2008 at 11:00 AM by Waldy | No Replies |
SqlClientPermission Exception
I have a vb.net app that runs as a console app. Wen I try to execute this exe from another (vb6) exe, I get a SqlClientPermission exception. I've been reading about .net security (something I have...
| On Tuesday, August 5th 2008 at 07:45 AM by cs_hart@yahoo.com | 3 Replies |
Asp.net Login Control "Remember Me"not Working
We are using a standard Asp.net Login control to authenticate users in a web application. We have allowed the 'remember me' checkbox to be displayed. We have set the the cookie timeout (in the forms...
| On Thursday, July 31st 2008 at 01:05 PM by Chris Moseley | No Replies |
Web Application Security Problem
Hi, I've taken on responsibility for a C# ASP.NET project and am having a little trouble with the security side of things. The architecture is something like this: Web Application A (WAA) makes...
| On Thursday, July 31st 2008 at 10:54 AM by |
Permission Diabled On A
permissions to my administrator account has been disabled any help
| On Monday, July 28th 2008 at 06:36 PM by Anonymous | No Replies |
Logon Script Placement For Domain
Should not the Primarylogonscript for the domain users be place in the Domain Policy and not just at the root of the Domain in Active Directory Tree? Also, doesn't the log on script go in the DC'...
| On Thursday, July 24th 2008 at 10:20 AM by Anonymous | 1 Reply |
LogOn Script Emergency Please Help!
Our Domain log on script: Primarylogon isn't mapping users to their home directories - it will work maybe if they log off and back on but on startup, they are all going to USERS$ of the share and...
| On Thursday, July 24th 2008 at 08:51 AM by Anonymous | No Replies |
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