Comments by Bhanu Pratap Verma (Top 30 by date)

DB server- Where database can only running, Sql sever installed here.
Web Server- Which can be handle only http request coming from client.
App Server- Where we keep the business logic.

Now the situation is that- We don't have proper 3 tier architecture so I am thinking the DLL's which makes after published the asp.net website to keep in the app server and all aspx page keep in web server. May be I am wrong, Please suggest the write way.

If I am thinking write please provide the solution how to do it?

Hi ,

I am getting error "RSA Key container was not found" when I run the command
"aspnet_regiis -pa "Container Name" "NT AUTHORITY\IUSR" as a administrator.

Please help , Its very urgent and highly appreciated.

Dear All,

I am using the key container for encrypt and decrypt for the password.

I am using the csp class and RSACryptoServiceProvider class to manage the container and key.
My application is running perfectly when I am running in my visual studio 2010.

When I hosted the application on IIS 7.0 server locally then system not able to find the container from the system to get the key .

Error show like "The system cannot find the file specified.".

I am saving the name of the container in database after create the container.

Please help, Its highly appreciated.
<pre> public void GenKey_SaveInContainer(string ContainerName)
{
try
{
// Create the CspParameters object and set the key container
// name used to store the RSA key pair.
CspParameters cp = new CspParameters();
cp.KeyContainerName = ContainerName;

// Create a new instance of RSACryptoServiceProvider that accesses
// the key container MyKeyContainerName.
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);

// Display the key information to the console.
//Console.WriteLine("Key added to container: \n {0}", rsa.ToXmlString(true));
string aa = rsa.ToXmlString(true);
}
catch (Exception Ex)
{
SaveExceptionInDatabase(Ex);

}
}
public string GetKeyFromContainer(string ContainerName)
{
string str = "";
try
{
// Create the CspParameters object and set the key container
// name used to store the RSA key pair.
CspParameters cp = new CspParameters();
cp.KeyContainerName = ContainerName;

// Create a new instance of RSACryptoServiceProvider that accesses
// the key container MyKeyContainerName.
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);
//AesCryptoServiceProvider AES = new AesCryptoServiceProvider(cp);


return rsa.ToXmlString(true);
// Display the key information to the console.
//Console.WriteLine("Key retrieved from container : \n {0}", rsa.ToXmlString(true));
}
catch (Exception Ex)
{
SaveExceptionInDatabase(Ex);
return str;
}
}
public void DeleteKeyFromContainer(string ContainerName)
{

try
{
// Create the CspParameters object and set the key container
// name used to store the RSA key pair.
CspParameters cp = new CspParameters();
cp.KeyContainerName = ContainerName;

// Create a new instance of RSACryptoServiceProvider that accesses
// the key container.
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);

// Delete the key entry in the container.
rsa.PersistKeyInCsp = false;

// Call Clear to release resources and delete the key from the container.
rsa.Clear();
rsa.Dispose();
}
catch (Exception Ex)
{
SaveExceptionInDatabase(Ex);

}

}</pre>

<pre>I have some client requirement to save the key in key container, I have already generated key and I want to store it in the key container. Is it possible to do it?

I am using AES algorithm to encrypt and decrypt data.Please follow the below code.</pre>



<pre>public string Encrypt_AES(string clearText)
{
string text = System.IO.File.ReadAllText("D:\\ITC\\Symmetric Key\\Key.txt");
string EncryptionKey = text;
byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
using (Aes encryptor = Aes.Create())
{
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
}
clearText = Convert.ToBase64String(ms.ToArray());
}
}
return clearText;
}
public string Decrypt_AES(string cipherText)
{
string text = System.IO.File.ReadAllText("D:\\ITC\\Symmetric Key\\Key.txt");
string EncryptionKey = text;
byte[] cipherBytes = Convert.FromBase64String(cipherText);
using (Aes encryptor = Aes.Create())
{
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
cipherText = Encoding.Unicode.GetString(ms.ToArray());
}
}
return cipherText;
}
#endregion</pre>

Rohan,
Error code block line(most bottom line of the code) : flashVer = flashVer.split(".")[0];

Dear Rohan, Thank you for your quick reply, I am already Implemented password hashing in my project but its client requirement
to use the password encrypt/decrypt with symmetric key cryptography.
Please help me out,, Project deadline coming soon.

Please do google before small problem you faced.

Please set target is blank for the button...

This is not a query, its already solved. It might be help to some one.

I already mentioned my problem, I want to show popup in middle of the page but it is coming always left most side.

Can any body help me out to get the solution?

Dear Pattrick Hu,
I am also trying Doconut support team to download the viewer, I sent 3 times email to doconut but they are not responding. Please help us.

Your help will be highly appreciated.

Hi my client using "Lotus Notes" for email, I need to export email to word and save in database.

Dear, I am creating web application and both user control are Independent.

I need to make the url like that.

Dear vinayoukuri,Thank you very much. Now I clear.

Dear You very much for your reply. I solved it.

Dear the format sent by client and they have only format like that. because they are using same format in multiple projects so we can not violent against him.

Thank Sergey Alexandrovich.
Can it be possible with out third party tool. Actually I need to do with c# code.

Hey sankarshan, now its working fine. thanks a lots.

Thank sir. I will keep in mind.

Hi Its also not working.