Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
SetHashAlgorithm Method
Collapse the table of content
Expand the table of content

DSASignatureDeformatter.SetHashAlgorithm Method

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

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

Public Overrides Sub SetHashAlgorithm ( _
	strName As String _


Type: System.String

The name of the hash algorithm to use for the signature deformatter.


The strName parameter does not map to the SHA1 hash algorithm.

Notes to Implementers

This method is not used. The DSA algorithm requires the SHA1 hash algorithm.

Imports System
Imports System.Security.Cryptography


Class DSASample

    Shared Sub Main()
            '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.

            '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.")
                Console.WriteLine("The signature was not verified.")
            End If 

        Catch e As CryptographicException
        End Try 
    End Sub 
End Class

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
© 2015 Microsoft