RSAPKCS1SignatureFormatter.CreateSignature Method (Byte[])

Creates the RSA PKCS #1 signature for the specified data.

Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)

public override byte[] CreateSignature (
	byte[] rgbHash
)
public byte[] CreateSignature (
	byte[] rgbHash
)
public override function CreateSignature (
	rgbHash : byte[]
) : byte[]

Parameters

rgbHash

The data to be signed.

Return Value

The digital signature for rgbHash.

Exception typeCondition

CryptographicUnexpectedOperationException

The key is a null reference (Nothing in Visual Basic).

-or-

The hash algorithm is a null reference (Nothing in Visual Basic).

ArgumentNullException

The rgbHash parameter is a null reference (Nothing in Visual Basic).

You must specify a key and a hash algorithm before calling this method.

using System;
using System.Security.Cryptography;

class RSASample
{
		
	static void Main()
	{
		try
		{
			//Create a new instance of RSACryptoServiceProvider.
			RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

			//The hash to sign.
			byte[] Hash = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100,197,213,134,130,135};

			//Create an RSAOPKCS1SignatureFormatter object and pass it the 
			//RSACryptoServiceProvider to transfer the key information.
			RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA);

			//Set the hash algorithm to SHA1.
			RSAFormatter.SetHashAlgorithm("SHA1");

			//Create a signature for HashValue and return it.
			byte[] SignedHash = RSAFormatter.CreateSignature(Hash);


		}
		catch(CryptographicException e)
		{
			Console.WriteLine(e.Message);
		}
	}

}

import System.*;
import System.Security.Cryptography.*;

class RSASample
{
    public static void main(String[] args)
    {
        try {
            // Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider rsa =  new RSACryptoServiceProvider();
            
            //The hash to sign.
            ubyte hash[] =  {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 
                224, 93, 25, 41, 100, 197, 213, 134, 130, 135};
            
            // Create an RSAOPKCS1SignatureFormatter object and pass it the 
            // RSACryptoServiceProvider to transfer the key information.
            RSAPKCS1SignatureFormatter rsaFormatter =  
                new RSAPKCS1SignatureFormatter(rsa);
            
            // Set the hash algorithm to SHA1.
            rsaFormatter.SetHashAlgorithm("SHA1");
            
            // Create a signature for HashValue and return it.
            ubyte signedHash[] = rsaFormatter.CreateSignature(hash);
        } 
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //main
} //RSASample

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0
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