DSASignatureFormatter.CreateSignature(Byte[]) Methode

Definitie

Naamruimte:
System.Security.Cryptography
Assembly:
mscorlib.dll
Assembly:
netstandard.dll

Hiermee maakt u de PKCS #1-handtekening (DSADigital Signature Algorithm) voor de opgegeven gegevens.

public:
 override cli::array <System::Byte> ^ CreateSignature(cli::array <System::Byte> ^ rgbHash);
public override byte[] CreateSignature(byte[] rgbHash);
override this.CreateSignature : byte[] -> byte[]
Public Overrides Function CreateSignature (rgbHash As Byte()) As Byte()

Parameters

rgbHash
Byte[]

De te ondertekenen gegevens.

Retouren

Byte[]

De digitale handtekening voor de opgegeven gegevens.

Uitzonderingen

ArgumentNullException

rgbHash is null.

CryptographicUnexpectedOperationException

De OID is null.

– of –

De DSA-sleutel is null.

Voorbeelden

using System;
using System.Security.Cryptography;

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

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

Imports System.Security.Cryptography

 _

Class DSASample


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

            '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 
            'DSA instance 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)

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

Opmerkingen

De resulterende handtekeninggegevens kunnen worden geverifieerd met behulp van VerifySignature.

Van toepassing op

Zie ook