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 Class DSASignatureDeformatter
	Inherits 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(Byte(), Byte())

Verifies the Digital Signature Algorithm (DSA) signature on the data.(Overrides AsymmetricSignatureDeformatter.VerifySignature(Byte(), Byte()).)

System_CAPS_pubmethodVerifySignature(HashAlgorithm, Byte())

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

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

.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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