RSAPKCS1SignatureDeformatter Clase

Definición

Espacio de nombres:

System.Security.Cryptography

Ensamblado:

System.Security.Cryptography.dll

Source:

RSAPKCS1SignatureDeformatter.cs

Comprueba una signatura PKCS #1 versión 1.5 de RSA.

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

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

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

Public Class RSAPKCS1SignatureDeformatter
Inherits AsymmetricSignatureDeformatter

Herencia

Object

AsymmetricSignatureDeformatter

RSAPKCS1SignatureDeformatter

Atributos

UnsupportedOSPlatformAttribute

Ejemplos

En el ejemplo siguiente se muestra cómo usar el VerifySignature método para comprobar una firma.

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

Comentarios

Esta clase se usa para comprobar una firma digital realizada con el RSA algoritmo .

Use RSAPKCS1SignatureFormatter para crear firmas digitales con el RSA algoritmo .

Constructores

RSAPKCS1SignatureDeformatter()	Inicializa una nueva instancia de la clase RSAPKCS1SignatureDeformatter.
RSAPKCS1SignatureDeformatter(AsymmetricAlgorithm)	Inicializa una nueva instancia de la clase RSAPKCS1SignatureDeformatter con la clave especificada.

Métodos

Equals(Object)	Determina si el objeto especificado es igual que el objeto actual. (Heredado de Object)
GetHashCode()	Sirve como la función hash predeterminada. (Heredado de Object)
GetType()	Obtiene el Type de la instancia actual. (Heredado de Object)
MemberwiseClone()	Crea una copia superficial del Object actual. (Heredado de Object)
SetHashAlgorithm(String)	Establece el algoritmo hash que se usará para comprobar la signatura.
SetKey(AsymmetricAlgorithm)	Establece la clave pública que se usará para comprobar la signatura.
ToString()	Devuelve una cadena que representa el objeto actual. (Heredado de Object)
VerifySignature(Byte[], Byte[])	Comprueba la signatura PKCS#1 de RSA de los datos especificados.
VerifySignature(HashAlgorithm, Byte[])	Crea la signatura a partir del valor hash especificado. (Heredado de AsymmetricSignatureDeformatter)

Consulte también

• servicios criptográficos