DSACryptoServiceProvider-Konstruktor (Int32)
Initialisiert eine neue Instanz der DSACryptoServiceProvider-Klasse mit der angegebenen Schlüsselgröße.
Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Sub New ( _
dwKeySize As Integer _
)
'Usage
Dim dwKeySize As Integer
Dim instance As New DSACryptoServiceProvider(dwKeySize)
public DSACryptoServiceProvider (
int dwKeySize
)
public:
DSACryptoServiceProvider (
int dwKeySize
)
public DSACryptoServiceProvider (
int dwKeySize
)
public function DSACryptoServiceProvider (
dwKeySize : int
)
Parameter
- dwKeySize
Die Größe des Schlüssels für den asymmetrischen Algorithmus in Bits.
Beispiel
Im folgenden Codebeispiel wird ein DSACryptoServiceProvider erstellt. Außerdem wird ein neues Schlüsselpaar generiert, das in einem Schlüsselcontainer beibehalten wird.
Imports System.Security.Cryptography
Module DSACSPExample
Sub Main()
Try
'Create a new instance of DSACryptoServiceProvider to generate
'a new key pair. This constructor specifies that the key-length
'will be 1024.
Dim DSAalg As New DSACryptoServiceProvider(1024)
'The hash value to sign.
Dim HashValue As Byte() = {59, 4, 248, 102, 77, 97, 142, 201, 210, _
12, 224, 93, 25, 41, 100, 197, 213, 134, _
130, 135}
'The value to hold the signed value.
Dim SignedHashValue As Byte() = DSASignHash(HashValue, DSAalg.ExportParameters(True), "SHA1")
'Verify the hash and display the results.
If DSAVerifyHash(HashValue, SignedHashValue, DSAalg.ExportParameters(False), "SHA1") Then
Console.WriteLine("The hash value was verified.")
Else
Console.WriteLine("The hash value was not verified.")
End If
Catch e As ArgumentNullException
Console.WriteLine(e.Message)
End Try
End Sub
Function DSASignHash(ByVal HashToSign() As Byte, ByVal DSAKeyInfo As DSAParameters, ByVal HashAlg As String) As Byte()
Try
'Create a new instance of DSACryptoServiceProvider.
Dim DSA As New DSACryptoServiceProvider
'Import the key information.
DSA.ImportParameters(DSAKeyInfo)
'Create an DSASignatureFormatter object and pass it the
'DSACryptoServiceProvider to transfer the private key.
Dim DSAFormatter As New DSASignatureFormatter(DSA)
'Set the hash algorithm to the passed value.
DSAFormatter.SetHashAlgorithm(HashAlg)
'Create a signature for HashValue and return it.
Return DSAFormatter.CreateSignature(HashToSign)
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Function DSAVerifyHash(ByVal HashValue() As Byte, ByVal SignedHashValue() As Byte, ByVal DSAKeyInfo As DSAParameters, ByVal HashAlg As String) As Boolean
Try
'Create a new instance of DSACryptoServiceProvider.
Dim DSA As New DSACryptoServiceProvider
'Import the key information.
DSA.ImportParameters(DSAKeyInfo)
'Create an DSASignatureDeformatter object and pass it the
'DSACryptoServiceProvider to transfer the private key.
Dim DSADeformatter As New DSASignatureDeformatter(DSA)
'Set the hash algorithm to the passed value.
DSADeformatter.SetHashAlgorithm(HashAlg)
'Verify signature and return the result.
Return DSADeformatter.VerifySignature(HashValue, SignedHashValue)
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return False
End Try
End Function
End Module
using System;
using System.Security.Cryptography;
class DSACSPExample
{
static void Main()
{
try
{
//Create a new instance of DSACryptoServiceProvider to generate
//a new key pair. This constructor specifies that the key-length
//will be 1024.
DSACryptoServiceProvider DSAalg = new DSACryptoServiceProvider(1024);
//The hash value to sign.
byte[] HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100,197,213,134,130,135};
//The value to hold the signed value.
byte[] SignedHashValue = DSASignHash(HashValue, DSAalg.ExportParameters(true), "SHA1");
//Verify the hash and display the results.
if(DSAVerifyHash(HashValue, SignedHashValue, DSAalg.ExportParameters(false), "SHA1"))
{
Console.WriteLine("The hash value was verified.");
}
else
{
Console.WriteLine("The hash value was not verified.");
}
}
catch(ArgumentNullException e)
{
Console.WriteLine(e.Message);
}
}
public static byte[] DSASignHash(byte[] HashToSign, DSAParameters DSAKeyInfo, string HashAlg)
{
try
{
//Create a new instance of DSACryptoServiceProvider.
DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();
//Import the key information.
DSA.ImportParameters(DSAKeyInfo);
//Create an DSASignatureFormatter object and pass it the
//DSACryptoServiceProvider to transfer the private key.
DSASignatureFormatter DSAFormatter = new DSASignatureFormatter(DSA);
//Set the hash algorithm to the passed value.
DSAFormatter.SetHashAlgorithm(HashAlg);
//Create a signature for HashValue and return it.
return DSAFormatter.CreateSignature(HashToSign);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
public static bool DSAVerifyHash(byte[] HashValue, byte[] SignedHashValue, DSAParameters DSAKeyInfo, string HashAlg)
{
try
{
//Create a new instance of DSACryptoServiceProvider.
DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();
//Import the key information.
DSA.ImportParameters(DSAKeyInfo);
//Create an DSASignatureDeformatter object and pass it the
//DSACryptoServiceProvider to transfer the private key.
DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSA);
//Set the hash algorithm to the passed value.
DSADeformatter.SetHashAlgorithm(HashAlg);
//Verify signature and return the result.
return DSADeformatter.VerifySignature(HashValue, SignedHashValue);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return false;
}
}
}
using namespace System;
using namespace System::Security::Cryptography;
array<Byte>^ DSASignHash( array<Byte>^HashToSign, DSAParameters DSAKeyInfo, String^ HashAlg )
{
try
{
//Create a new instance of DSACryptoServiceProvider.
DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
//Import the key information.
DSA->ImportParameters( DSAKeyInfo );
//Create an DSASignatureFormatter object and pass it the
//DSACryptoServiceProvider to transfer the private key.
DSASignatureFormatter^ DSAFormatter = gcnew DSASignatureFormatter( DSA );
//Set the hash algorithm to the passed value.
DSAFormatter->SetHashAlgorithm( HashAlg );
//Create a signature for HashValue and return it.
return DSAFormatter->CreateSignature( HashToSign );
}
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
return nullptr;
}
}
bool DSAVerifyHash( array<Byte>^HashValue, array<Byte>^SignedHashValue, DSAParameters DSAKeyInfo, String^ HashAlg )
{
try
{
//Create a new instance of DSACryptoServiceProvider.
DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
//Import the key information.
DSA->ImportParameters( DSAKeyInfo );
//Create an DSASignatureDeformatter object and pass it the
//DSACryptoServiceProvider to transfer the private key.
DSASignatureDeformatter^ DSADeformatter = gcnew DSASignatureDeformatter( DSA );
//Set the hash algorithm to the passed value.
DSADeformatter->SetHashAlgorithm( HashAlg );
//Verify signature and return the result.
return DSADeformatter->VerifySignature( HashValue, SignedHashValue );
}
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
return false;
}
}
int main()
{
try
{
//Create a new instance of DSACryptoServiceProvider to generate
//a new key pair. This constructor specifies that the key-length
//will be 1024.
DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( 1024 );
//The hash value to sign.
array<Byte>^HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100,197,213,134,130,135};
//The value to hold the signed value.
array<Byte>^SignedHashValue = DSASignHash( HashValue, DSAalg->ExportParameters( true ), "SHA1" );
//Verify the hash and display the results.
if ( DSAVerifyHash( HashValue, SignedHashValue, DSAalg->ExportParameters( false ), "SHA1" ) )
{
Console::WriteLine( "The hash value was verified." );
}
else
{
Console::WriteLine( "The hash value was not verified." );
}
}
catch ( ArgumentNullException^ e )
{
Console::WriteLine( e->Message );
}
}
import System.*;
import System.Security.Cryptography.*;
class DSACSPExample
{
public static void main(String args[])
{
try {
//Create a new instance of DSACryptoServiceProvider to generate
//a new key pair. This constructor specifies that the key-length
//will be 1024.
DSACryptoServiceProvider dsaAlg =
new DSACryptoServiceProvider(1024);
//The hash value to sign.
ubyte hashValue[] = { 59, 4, 248, 102, 77, 97, 142, 201, 210, 12,
224, 93, 25, 41, 100, 197, 213, 134, 130, 135 };
//The value to hold the signed value.
ubyte signedHashValue[] = DSASignHash(hashValue,
dsaAlg.ExportParameters(true), "SHA1");
//Verify the hash and display the results.
if (DSAVerifyHash(hashValue, signedHashValue,
dsaAlg.ExportParameters(false), "SHA1")) {
Console.WriteLine("The hash value was verified.");
}
else {
Console.WriteLine("The hash value was not verified.");
}
}
catch (ArgumentNullException e) {
Console.WriteLine(e.get_Message());
}
} //main
public static ubyte[] DSASignHash(ubyte hashToSign[],
DSAParameters dsaKeyInfo,
String hashAlg)
{
try {
//Create a new instance of DSACryptoServiceProvider.
DSACryptoServiceProvider dsa = new DSACryptoServiceProvider();
//Import the key information.
dsa.ImportParameters(dsaKeyInfo);
//Create an DSASignatureFormatter object and pass it the
//DSACryptoServiceProvider to transfer the private key.
DSASignatureFormatter dsaFormatter = new DSASignatureFormatter(dsa);
//Set the hash algorithm to the passed value.
dsaFormatter.SetHashAlgorithm(hashAlg);
//Create a signature for hashValue and return it.
return dsaFormatter.CreateSignature(hashToSign);
}
catch (CryptographicException e) {
Console.WriteLine(e.get_Message());
return null;
}
} //DSASignHash
public static boolean DSAVerifyHash(ubyte hashValue[],
ubyte signedHashValue[],
DSAParameters dsaKeyInfo, String hashAlg)
{
try {
//Create a new instance of DSACryptoServiceProvider.
DSACryptoServiceProvider dsa = new DSACryptoServiceProvider();
//Import the key information.
dsa.ImportParameters(dsaKeyInfo);
//Create an DSASignatureDeformatter object and pass it the
//DSACryptoServiceProvider to transfer the private key.
DSASignatureDeformatter dsaDeformatter =
new DSASignatureDeformatter(dsa);
//Set the hash algorithm to the passed value.
dsaDeformatter.SetHashAlgorithm(hashAlg);
//Verify signature and return the result.
return dsaDeformatter.VerifySignature(hashValue, signedHashValue);
}
catch (CryptographicException e) {
Console.WriteLine(e.get_Message());
return false;
}
} //DSAVerifyHash
} //DSACSPExample
.NET Framework-Sicherheit
- SecurityPermission für Aufrufe von nicht verwaltetem Code. Zugeordnete Enumeration: SecurityPermissionFlag.UnmanagedCode
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
DSACryptoServiceProvider-Klasse
DSACryptoServiceProvider-Member
System.Security.Cryptography-Namespace