DSASignatureDeformatter Class

 

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

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

System::Object
  System.Security.Cryptography::AsymmetricSignatureDeformatter
    System.Security.Cryptography::DSASignatureDeformatter

[ComVisibleAttribute(true)]
public ref class DSASignatureDeformatter : AsymmetricSignatureDeformatter

NameDescription
System_CAPS_pubmethodDSASignatureDeformatter()

Initializes a new instance of the DSASignatureDeformatter class.

System_CAPS_pubmethodDSASignatureDeformatter(AsymmetricAlgorithm^)

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

NameDescription
System_CAPS_pubmethodEquals(Object^)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodSetHashAlgorithm(String^)

Specifies the hash algorithm for the Digital Signature Algorithm (DSA) signature deformatter.(Overrides AsymmetricSignatureDeformatter::SetHashAlgorithm(String^).)

System_CAPS_pubmethodSetKey(AsymmetricAlgorithm^)

Specifies the key to be used for the Digital Signature Algorithm (DSA) signature deformatter.(Overrides AsymmetricSignatureDeformatter::SetKey(AsymmetricAlgorithm^).)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubmethodVerifySignature(array<Byte>^, array<Byte>^)

Verifies the Digital Signature Algorithm (DSA) signature on the data.(Overrides AsymmetricSignatureDeformatter::VerifySignature(array<Byte>^, array<Byte>^).)

System_CAPS_pubmethodVerifySignature(HashAlgorithm^, array<Byte>^)

Verifies the signature from the specified hash value.(Inherited from AsymmetricSignatureDeformatter.)

#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 );
   }

}

.NET Framework
Available since 1.1

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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