DSASignatureDeformatter Class
.NET Framework 2.0
Verifies a Digital Signature Algorithm (DSA) PKCS#1 v1.5 signature.
Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)
Assembly: mscorlib (in mscorlib.dll)
'Declaration <ComVisibleAttribute(True)> _ Public Class DSASignatureDeformatter Inherits AsymmetricSignatureDeformatter 'Usage Dim instance As DSASignatureDeformatter
/** @attribute ComVisibleAttribute(true) */ public class DSASignatureDeformatter extends AsymmetricSignatureDeformatter
ComVisibleAttribute(true) public class DSASignatureDeformatter extends AsymmetricSignatureDeformatter
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
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
System.Object
System.Security.Cryptography.AsymmetricSignatureDeformatter
System.Security.Cryptography.DSASignatureDeformatter
System.Security.Cryptography.AsymmetricSignatureDeformatter
System.Security.Cryptography.DSASignatureDeformatter
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
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