DSASignatureDeformatter.SetHashAlgorithm-Methode
Gibt den Hashalgorithmus für das Deformatierungsprogramm für DSA-Signaturen (Digital Signature Algorithm) an.
Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Overrides Sub SetHashAlgorithm ( _
strName As String _
)
'Usage
Dim instance As DSASignatureDeformatter
Dim strName As String
instance.SetHashAlgorithm(strName)
public override void SetHashAlgorithm (
string strName
)
public:
virtual void SetHashAlgorithm (
String^ strName
) override
public void SetHashAlgorithm (
String strName
)
public override function SetHashAlgorithm (
strName : String
)
Parameter
- strName
Der Name des Hashalgorithmus für das Signaturdeformatierungsprogramm.
Ausnahmen
| Ausnahmetyp | Bedingung |
|---|---|
Der strName-Parameter wird dem SHA1-Hashalgorithmus nicht zugeordnet. |
Hinweise
Hinweise für Implementierer Diese Methode wird nicht verwendet. Der DSA-Algorithmus erfordert den SHA1-Hashalgorithmus.
Beispiel
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
using System;
using System.Security.Cryptography;
class DSASample
{
static void Main()
{
try
{
//Create a new instance of DSACryptoServiceProvider.
DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();
//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
//DSACryptoServiceProvider 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
//DSACryptoServiceProvider 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);
}
}
}
#using <System.dll>
using namespace System;
using namespace System::Security::Cryptography;
int main()
{
try
{
//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." );
}
else
{
Console::WriteLine( "The signature was not verified." );
}
}
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
}
}
import System.*;
import System.Security.Cryptography.*;
class DSASample
{
public static void main(String[] args)
{
try {
// Create a new instance of DSACryptoServiceProvider.
DSACryptoServiceProvider dsa = new DSACryptoServiceProvider();
// The hash to sign.
ubyte 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 = new DSASignatureFormatter(dsa);
// Set the hash algorithm to SHA1.
dsaFormatter.SetHashAlgorithm("SHA1");
// Create a signature for HashValue and return it.
ubyte signedHash[] = dsaFormatter.CreateSignature(hash);
// Create an DSASignatureDeformatter object and pass it the
// DSACryptoServiceProvider 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.get_Message());
}
} //main
} //DSASample
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0
Siehe auch
Referenz
DSASignatureDeformatter-Klasse
DSASignatureDeformatter-Member
System.Security.Cryptography-Namespace