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DSASignatureDeformatter Class

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


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

public ref class DSASignatureDeformatter : public AsymmetricSignatureDeformatter

The DSASignatureDeformatter type exposes the following members.

Public methodDSASignatureDeformatter()Initializes a new instance of the DSASignatureDeformatter class.
Public methodDSASignatureDeformatter(AsymmetricAlgorithm)Initializes a new instance of the DSASignatureDeformatter class with the specified key.

Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSetHashAlgorithmSpecifies the hash algorithm for the Digital Signature Algorithm (DSA) signature deformatter. (Overrides AsymmetricSignatureDeformatter::SetHashAlgorithm(String).)
Public methodSetKeySpecifies the key to be used for the Digital Signature Algorithm (DSA) signature deformatter. (Overrides AsymmetricSignatureDeformatter::SetKey(AsymmetricAlgorithm).)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Public methodVerifySignature(array<Byte>, array<Byte>)Verifies the Digital Signature Algorithm (DSA) signature on the data. (Overrides AsymmetricSignatureDeformatter::VerifySignature(array<Byte>, array<Byte>).)
Public methodVerifySignature(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()

      //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." );
         Console::WriteLine( "The signature was not verified." );
   catch ( CryptographicException^ e ) 
      Console::WriteLine( e->Message );


.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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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