Imports System
Imports System.Security.Cryptography
_
Class DSACSPSample
Shared Sub Main()
Try
'Create a new instance of DSACryptoServiceProvider to generate
'a new key pair.
Dim DSA As New DSACryptoServiceProvider()
'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, DSA.ExportParameters(True), "SHA1")
'Verify the hash and display the results.
If DSAVerifyHash(HashValue, SignedHashValue, DSA.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
Public Shared 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
Public Shared 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 Class
using System;
using System.Security.Cryptography;
class DSACSPSample
{
static void Main()
{
try
{
//Create a new instance of DSACryptoServiceProvider to generate
//a new key pair.
DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();
//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, DSA.ExportParameters(true), "SHA1");
//Verify the hash and display the results.
if(DSAVerifyHash(HashValue, SignedHashValue, DSA.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 <System.dll>
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.
DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
//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, DSA->ExportParameters( true ), "SHA1" );
//Verify the hash and display the results.
if ( DSAVerifyHash( HashValue, SignedHashValue, DSA->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 DSACSPSample
{
public static void main(String[] args)
{
try {
// Create a new instance of DSACryptoServiceProvider to generate
// a new key pair.
DSACryptoServiceProvider dsa = new DSACryptoServiceProvider();
// 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,
dsa.ExportParameters(true), "SHA1");
// Verify the hash and display the results.
if (DSAVerifyHash(hashValue, signedHashValue,
dsa.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
} //DSACSPSample