DSASignatureDeformatter Constructors

Definition

Namespace:

System.Security.Cryptography

Assemblies:

netstandard.dll, System.Security.Cryptography.dll

Initializes a new instance of the DSASignatureDeformatter class.

Overloads

DSASignatureDeformatter()	Initializes a new instance of the DSASignatureDeformatter class.
DSASignatureDeformatter(AsymmetricAlgorithm)	Initializes a new instance of the DSASignatureDeformatter class with the specified key.

DSASignatureDeformatter()

Source:

DSASignatureDeformatter.cs

Initializes a new instance of the DSASignatureDeformatter class.

C#

public DSASignatureDeformatter();

Examples

C#

using System;
using System.Security.Cryptography;

class DSASample
{
        
    static void Main()
    {
        try
        {
            //Create a new instance of DSA.
            DSA DSA = DSA.Create();

            //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 
            //DSA instance 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 
            //DSA instance 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);
        }
    }
}

See also

• Cryptographic Services

DSASignatureDeformatter(AsymmetricAlgorithm)

Source:

DSASignatureDeformatter.cs

Initializes a new instance of the DSASignatureDeformatter class with the specified key.

C#

public DSASignatureDeformatter(System.Security.Cryptography.AsymmetricAlgorithm key);

Parameters

key

AsymmetricAlgorithm

The instance of Digital Signature Algorithm (DSA) that holds the key.

Exceptions

ArgumentNullException

key is null.

See also

• Cryptographic Services