RSAPKCS1SignatureFormatter RSAPKCS1SignatureFormatter RSAPKCS1SignatureFormatter RSAPKCS1SignatureFormatter Class

Definition

Creates an RSA PKCS #1 version 1.5 signature.

public ref class RSAPKCS1SignatureFormatter : System::Security::Cryptography::AsymmetricSignatureFormatter
[System.Runtime.InteropServices.ComVisible(true)]
public class RSAPKCS1SignatureFormatter : System.Security.Cryptography.AsymmetricSignatureFormatter
type RSAPKCS1SignatureFormatter = class
    inherit AsymmetricSignatureFormatter
Public Class RSAPKCS1SignatureFormatter
Inherits AsymmetricSignatureFormatter
Inheritance
RSAPKCS1SignatureFormatterRSAPKCS1SignatureFormatterRSAPKCS1SignatureFormatterRSAPKCS1SignatureFormatter
Attributes

Examples

The following example demonstrates how to create a PKCS #1 version 1.5 signature.

using System;
using System.Security.Cryptography;

class RSASample
{

    static void Main()
    {
        try
        {
            //Create a new instance of RSACryptoServiceProvider.
            using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
            {
                //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 
                //RSACryptoServiceProvider 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);
            }

        }
        catch (CryptographicException e)
        {
            Console.WriteLine(e.Message);
        }
    }

}
Imports System.Security.Cryptography

Friend Class RSASample

	Shared Sub Main()
		Try
			'Create a new instance of RSACryptoServiceProvider.
			Using rsa As New RSACryptoServiceProvider()
				'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 
				'RSACryptoServiceProvider 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)
			End Using

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

End Class

Remarks

This class is used to create a digital signature using the RSA algorithm.

Use RSAPKCS1SignatureDeformatter to verify digital signatures with the RSA algorithm.

Constructors

RSAPKCS1SignatureFormatter() RSAPKCS1SignatureFormatter() RSAPKCS1SignatureFormatter() RSAPKCS1SignatureFormatter()

Initializes a new instance of the RSAPKCS1SignatureFormatter class.

RSAPKCS1SignatureFormatter(AsymmetricAlgorithm) RSAPKCS1SignatureFormatter(AsymmetricAlgorithm) RSAPKCS1SignatureFormatter(AsymmetricAlgorithm) RSAPKCS1SignatureFormatter(AsymmetricAlgorithm)

Initializes a new instance of the RSAPKCS1SignatureFormatter class with the specified key.

Methods

CreateSignature(Byte[]) CreateSignature(Byte[]) CreateSignature(Byte[]) CreateSignature(Byte[])

Creates the RSA PKCS #1 signature for the specified data.

CreateSignature(HashAlgorithm) CreateSignature(HashAlgorithm) CreateSignature(HashAlgorithm) CreateSignature(HashAlgorithm)

Creates the signature from the specified hash value.

(Inherited from AsymmetricSignatureFormatter)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
SetHashAlgorithm(String) SetHashAlgorithm(String) SetHashAlgorithm(String) SetHashAlgorithm(String)

Sets the hash algorithm to use for creating the signature.

SetKey(AsymmetricAlgorithm) SetKey(AsymmetricAlgorithm) SetKey(AsymmetricAlgorithm) SetKey(AsymmetricAlgorithm)

Sets the private key to use for creating the signature.

ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)

Applies to