Use RSAPKCS1SignatureFormatter to create a digital signature and then uses the RSAPKCS1SignatureDeformatter class to verify the signature. : RSA « Security

Use RSAPKCS1SignatureFormatter to create a digital signature and then uses the RSAPKCS1SignatureDeformatter class to verify the signature. : RSA « Security « C# / CSharp Tutorial

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C# / CSharp Tutorial » Security » RSA

35.10.8.Use RSAPKCS1SignatureFormatter to create a digital signature and then uses the RSAPKCS1SignatureDeformatter class to verify the signature.

using System;

using System.Security.Cryptography;



class RSASample

{

        

    static void Main()

    {

        try

        {

            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            byte[] Hash = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100,197,213,134,130,135};



            RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA);



            RSAFormatter.SetHashAlgorithm("SHA1");



            byte[] SignedHash = RSAFormatter.CreateSignature(Hash);



            RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA);



            RSADeformatter.SetHashAlgorithm("SHA1");



            Console.WriteLine(RSADeformatter.VerifySignature(Hash, SignedHash));





        }

        catch(CryptographicException e)

        {

            Console.WriteLine(e.Message);

        }

    }



}

35.10.RSA
	35.10.1.	Asymmetric cryptography
	35.10.2.	Encrypt with RSACryptoServiceProvider
	35.10.3.	Using RSACryptoServiceProvider
	35.10.4.	Using RSAPKCS1SignatureDeformatter
	35.10.5.	RSACryptoServiceProvider reads from xml key
	35.10.6.	CspParameters and RSACryptoServiceProvider
	35.10.7.	Encrypt an XML document using an asymmetric key
	35.10.8.	Use RSAPKCS1SignatureFormatter to create a digital signature and then uses the RSAPKCS1SignatureDeformatter class to verify the signature.

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