RSAPKCS1SignatureDeformatter Classe

Definição

public ref class RSAPKCS1SignatureDeformatter : System::Security::Cryptography::AsymmetricSignatureDeformatter

[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public class RSAPKCS1SignatureDeformatter : System.Security.Cryptography.AsymmetricSignatureDeformatter

public class RSAPKCS1SignatureDeformatter : System.Security.Cryptography.AsymmetricSignatureDeformatter

[System.Runtime.InteropServices.ComVisible(true)]
public class RSAPKCS1SignatureDeformatter : System.Security.Cryptography.AsymmetricSignatureDeformatter

[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
type RSAPKCS1SignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter

type RSAPKCS1SignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter

[<System.Runtime.InteropServices.ComVisible(true)>]
type RSAPKCS1SignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter

Public Class RSAPKCS1SignatureDeformatter
Inherits AsymmetricSignatureDeformatter

Herança

Object

AsymmetricSignatureDeformatter

RSAPKCS1SignatureDeformatter

Atributos

UnsupportedOSPlatformAttribute ComVisibleAttribute

Exemplos

O exemplo seguinte demonstra como usar o VerifySignature método para verificar uma assinatura.

using System;
using System.Security.Cryptography;

class RSASample
{

    static void Main()
    {
        try
        {
            //Create a new instance of RSA.
            using (RSA rsa = RSA.Create())
            {
                //The hash to sign.
                byte[] hash;
                using (SHA256 sha256 = SHA256.Create())
                {
                    byte[] data = new byte[] { 59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, 93, 25, 41, 100, 197, 213, 134, 130, 135 };
                    hash = sha256.ComputeHash(data);
                }

                //Create an RSASignatureFormatter object and pass it the 
                //RSA instance to transfer the key information.
                RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(rsa);

                //Set the hash algorithm to SHA256.
                RSAFormatter.SetHashAlgorithm("SHA256");

                //Create a signature for HashValue and return it.
                byte[] signedHash = RSAFormatter.CreateSignature(hash);
                //Create an RSAPKCS1SignatureDeformatter object and pass it the  
                //RSA instance to transfer the key information.
                RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(rsa);
                RSADeformatter.SetHashAlgorithm("SHA256");
                //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);
        }
    }
}

Imports System.Security.Cryptography

Friend Class RSASample

    Shared Sub Main()
        Try
            'Create a new instance of RSA.
            Using rsa As RSA = RSA.Create()
                'The hash to sign.
                Dim hash() As Byte
                Using sha256 As SHA256 = SHA256.Create()
                    Dim data() As Byte = { 59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, 93, 25, 41, 100, 197, 213, 134, 130, 135 }
                    hash = sha256.ComputeHash(data)
                End Using

                'Create an RSASignatureFormatter object and pass it the 
                'RSA instance to transfer the key information.
                Dim RSAFormatter As New RSAPKCS1SignatureFormatter(rsa)

                'Set the hash algorithm to SHA256.
                RSAFormatter.SetHashAlgorithm("SHA256")

                'Create a signature for HashValue and return it.
                Dim signedHash() As Byte = RSAFormatter.CreateSignature(hash)
                'Create an RSAPKCS1SignatureDeformatter object and pass it the  
                'RSA instance to transfer the key information.
                Dim RSADeformatter As New RSAPKCS1SignatureDeformatter(rsa)
                RSADeformatter.SetHashAlgorithm("SHA256")
                '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
            End Using

        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub

End Class

Observações

Esta classe é usada para verificar uma assinatura digital feita com o RSA algoritmo.

Use RSAPKCS1SignatureFormatter para criar assinaturas digitais com o RSA algoritmo.

Ver também

• Serviços de criptografia