TlsRsaSigner.cs :  » PDF » iTextSharp » Org » BouncyCastle » Crypto » Tls » C# / CSharp Open Source

using System;

using Org.BouncyCastle.Crypto.Digests;
using Org.BouncyCastle.Crypto.Encodings;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Signers;

namespace Org.BouncyCastle.Crypto.Tls{
  internal class TlsRsaSigner
      : TlsSigner
  {
    public byte[] CalculateRawSignature(AsymmetricKeyParameter privateKey, byte[] md5andsha1)
    {
      ISigner sig = new GenericSigner(new Pkcs1Encoding(new RsaBlindedEngine()), new NullDigest());
      sig.Init(true, privateKey);
      sig.BlockUpdate(md5andsha1, 0, md5andsha1.Length);
      return sig.GenerateSignature();
    }

    public ISigner CreateSigner()
    {
      return new GenericSigner(new Pkcs1Encoding(new RsaBlindedEngine()), new CombinedHash());
    }
  }
}