DSASignatureDeformatter DSASignatureDeformatter DSASignatureDeformatter DSASignatureDeformatter Class

Definition

Verifies a Digital Signature Algorithm (DSA) PKCS#1 v1.5 signature.

public ref class DSASignatureDeformatter : System::Security::Cryptography::AsymmetricSignatureDeformatter
[System.Runtime.InteropServices.ComVisible(true)]
public class DSASignatureDeformatter : System.Security.Cryptography.AsymmetricSignatureDeformatter
type DSASignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter
Public Class DSASignatureDeformatter
Inherits AsymmetricSignatureDeformatter
Inheritance
Attributes

Examples

#using <System.dll>

using namespace System;
using namespace System::Security::Cryptography;
int main()
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //The hash to sign.
      array<Byte>^Hash = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100,197,213,134,130,135};
      
      //Create an DSASignatureFormatter object and pass it the 
      //DSACryptoServiceProvider to transfer the key information.
      DSASignatureFormatter^ DSAFormatter = gcnew DSASignatureFormatter( DSA );
      
      //Set the hash algorithm to SHA1.
      DSAFormatter->SetHashAlgorithm( "SHA1" );
      
      //Create a signature for HashValue and return it.
      array<Byte>^SignedHash = DSAFormatter->CreateSignature( Hash );
      
      //Create an DSASignatureDeformatter object and pass it the 
      //DSACryptoServiceProvider to transfer the key information.
      DSASignatureDeformatter^ DSADeformatter = gcnew DSASignatureDeformatter( DSA );
      
      //Verify the hash and display the results to the console.
      if ( DSADeformatter->VerifySignature( Hash, SignedHash ) )
      {
         Console::WriteLine( "The signature was verified." );
      }
      else
      {
         Console::WriteLine( "The signature was not verified." );
      }
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

using System;
using System.Security.Cryptography;

class DSASample
{
		
	static void Main()
	{
		try
		{
			//Create a new instance of DSACryptoServiceProvider.
			DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

			//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 DSASignatureFormatter object and pass it the 
			//DSACryptoServiceProvider to transfer the key information.
			DSASignatureFormatter DSAFormatter = new DSASignatureFormatter(DSA);

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

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

			//Create an DSASignatureDeformatter object and pass it the 
			//DSACryptoServiceProvider to transfer the key information.
			DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSA);

			//Verify the hash and display the results to the console.
			if(DSADeformatter.VerifySignature(Hash, SignedHash))
			{
				Console.WriteLine("The signature was verified.");
			}
			else
			{
				Console.WriteLine("The signature was not verified.");
			}

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

}
Imports System
Imports System.Security.Cryptography

 _

Class DSASample


    Shared Sub Main()
        Try
            'Create a new instance of DSACryptoServiceProvider.
            Dim DSA As New DSACryptoServiceProvider()

            'The hash to sign.
            Dim Hash As Byte() = {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, 93, 25, 41, 100, 197, 213, 134, 130, 135}

            'Create an DSASignatureFormatter object and pass it the 
            'DSACryptoServiceProvider to transfer the key information.
            Dim DSAFormatter As New DSASignatureFormatter(DSA)

            'Set the hash algorithm to SHA1.
            DSAFormatter.SetHashAlgorithm("SHA1")

            'Create a signature for HashValue and return it.
            Dim SignedHash As Byte() = DSAFormatter.CreateSignature(Hash)

            'Create an DSASignatureDeformatter object and pass it the 
            'DSACryptoServiceProvider to transfer the key information.
            Dim DSADeformatter As New DSASignatureDeformatter(DSA)

            'Verify the hash and display the results to the console.
            If DSADeformatter.VerifySignature(Hash, SignedHash) Then
                Console.WriteLine("The signature was verified.")
            Else
                Console.WriteLine("The signature was not verified.")
            End If

        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub
End Class

Constructors

DSASignatureDeformatter() DSASignatureDeformatter() DSASignatureDeformatter() DSASignatureDeformatter()

Initializes a new instance of the DSASignatureDeformatter class.

DSASignatureDeformatter(AsymmetricAlgorithm) DSASignatureDeformatter(AsymmetricAlgorithm) DSASignatureDeformatter(AsymmetricAlgorithm) DSASignatureDeformatter(AsymmetricAlgorithm)

Initializes a new instance of the DSASignatureDeformatter class with the specified key.

Methods

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
SetHashAlgorithm(String) SetHashAlgorithm(String) SetHashAlgorithm(String) SetHashAlgorithm(String)

Specifies the hash algorithm for the Digital Signature Algorithm (DSA) signature deformatter.

SetKey(AsymmetricAlgorithm) SetKey(AsymmetricAlgorithm) SetKey(AsymmetricAlgorithm) SetKey(AsymmetricAlgorithm)

Specifies the key to be used for the Digital Signature Algorithm (DSA) signature deformatter.

ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)
VerifySignature(Byte[], Byte[]) VerifySignature(Byte[], Byte[]) VerifySignature(Byte[], Byte[]) VerifySignature(Byte[], Byte[])

Verifies the Digital Signature Algorithm (DSA) signature on the data.

VerifySignature(HashAlgorithm, Byte[]) VerifySignature(HashAlgorithm, Byte[]) VerifySignature(HashAlgorithm, Byte[]) VerifySignature(HashAlgorithm, Byte[])

Verifies the signature from the specified hash value.

(Inherited from AsymmetricSignatureDeformatter)

Applies to