RSAPKCS1SignatureDeformatter.SetHashAlgorithm-Methode
Legt den zum Überprüfen der Signatur zu verwendenden Hashalgorithmus fest.
Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Overrides Sub SetHashAlgorithm ( _
strName As String _
)
'Usage
Dim instance As RSAPKCS1SignatureDeformatter
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 zum Überprüfen der Signatur.
Hinweise
Sie müssen einen Hashalgorithmus festlegen, bevor Sie VerifySignature aufrufen.
Beispiel
Im folgenden Codebeispiel wird mithilfe der RSAPKCS1SignatureFormatter-Klasse eine digitale Signatur erstellt, die anschließend mithilfe der RSAPKCS1SignatureDeformatter-Klasse überprüft wird.
Imports System
Imports System.Security.Cryptography
_
Class RSASample
Shared Sub Main()
Try
'Create a new instance of RSACryptoServiceProvider.
Dim RSA As New RSACryptoServiceProvider()
'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 RSAOPKCS1SignatureFormatter object and pass it the
'RSACryptoServiceProvider to transfer the key information.
Dim RSAFormatter As New RSAPKCS1SignatureFormatter(RSA)
'Set the hash algorithm to SHA1.
RSAFormatter.SetHashAlgorithm("SHA1")
'Create a signature for HashValue and return it.
Dim SignedHash As Byte() = RSAFormatter.CreateSignature(Hash)
'Create an RSAPKCS1SignatureDeformatter object and pass it the
'RSACryptoServiceProvider to transfer the key information.
Dim RSADeformatter As New RSAPKCS1SignatureDeformatter(RSA)
RSADeformatter.SetHashAlgorithm("SHA1")
'Verify the hash and display the results to the console.
If RSADeformatter.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 RSASample
{
static void Main()
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
//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 RSAOPKCS1SignatureFormatter object and pass it the
//RSACryptoServiceProvider to transfer the key information.
RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA);
//Set the hash algorithm to SHA1.
RSAFormatter.SetHashAlgorithm("SHA1");
//Create a signature for HashValue and return it.
byte[] SignedHash = RSAFormatter.CreateSignature(Hash);
//Create an RSAPKCS1SignatureDeformatter object and pass it the
//RSACryptoServiceProvider to transfer the key information.
RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA);
RSADeformatter.SetHashAlgorithm("SHA1");
//Verify the hash and display the results to the console.
if(RSADeformatter.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 RSACryptoServiceProvider.
RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
//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 RSAOPKCS1SignatureFormatter object and pass it the
//RSACryptoServiceProvider to transfer the key information.
RSAPKCS1SignatureFormatter^ RSAFormatter = gcnew RSAPKCS1SignatureFormatter( RSA );
//Set the hash algorithm to SHA1.
RSAFormatter->SetHashAlgorithm( "SHA1" );
//Create a signature for HashValue and return it.
array<Byte>^SignedHash = RSAFormatter->CreateSignature( Hash );
//Create an RSAPKCS1SignatureDeformatter object and pass it the
//RSACryptoServiceProvider to transfer the key information.
RSAPKCS1SignatureDeformatter^ RSADeformatter = gcnew RSAPKCS1SignatureDeformatter( RSA );
RSADeformatter->SetHashAlgorithm( "SHA1" );
//Verify the hash and display the results to the console.
if ( RSADeformatter->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 RSASample
{
public static void main(String[] args)
{
try {
// Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
//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 RSAOPKCS1SignatureFormatter object and pass it the
// RSACryptoServiceProvider to transfer the key information.
RSAPKCS1SignatureFormatter rsaFormatter =
new RSAPKCS1SignatureFormatter(rsa);
// Set the hash algorithm to SHA1.
rsaFormatter.SetHashAlgorithm("SHA1");
// Create a signature for HashValue and return it.
ubyte signedHash[] = rsaFormatter.CreateSignature(hash);
// Create an RSAPKCS1SignatureDeformatter object and pass it the
// RSACryptoServiceProvider to transfer the key information.
RSAPKCS1SignatureDeformatter rsaDeformatter =
new RSAPKCS1SignatureDeformatter(rsa);
rsaDeformatter.SetHashAlgorithm("SHA1");
// Verify the hash and display the results to the console.
if (rsaDeformatter.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
} //RSASample
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
RSAPKCS1SignatureDeformatter-Klasse
RSAPKCS1SignatureDeformatter-Member
System.Security.Cryptography-Namespace