DSASignatureDeformatter.SetHashAlgorithm(String) Methode

Definitie

Naamruimte:
System.Security.Cryptography
Assembly's:
netstandard.dll, System.Security.Cryptography.dll
Assembly's:
netstandard.dll, System.Security.Cryptography.Algorithms.dll
Assembly:
System.Security.Cryptography.Algorithms.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll
Bron:
DSASignatureDeformatter.cs
Bron:
DSASignatureDeformatter.cs
Bron:
DSASignatureDeformatter.cs
Bron:
DSASignatureDeformatter.cs
Bron:
DSASignatureDeformatter.cs

Hiermee geeft u het hash-algoritme voor de handtekeningopmaak van het digital signature algoritme (DSA).

public:
 override void SetHashAlgorithm(System::String ^ strName);
public override void SetHashAlgorithm(string strName);
override this.SetHashAlgorithm : string -> unit
Public Overrides Sub SetHashAlgorithm (strName As String)

Parameters

strName
String

De naam van het hash-algoritme dat moet worden gebruikt voor de handtekeningopmaak.

Uitzonderingen

CryptographicUnexpectedOperationException

De strName parameter wordt niet toegewezen aan het SHA1 hash-algoritme.

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);

            //Create an DSASignatureDeformatter object and pass it the 
            //DSA instance to transfer the key information.
            DSASignatureDeformatter DSADeformatter = new 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);
        }
    }
}

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)

            'Create an DSASignatureDeformatter object and pass it the 
            'DSA instance 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

Notities voor overnemers

Deze methode wordt niet gebruikt. Het DSA algoritme vereist het SHA1 hash-algoritme.

Van toepassing op

Zie ook