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

using System;

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

namespace Org.BouncyCastle.Crypto.Tls{
  internal class TlsDssSigner
    : TlsSigner
  {
    public byte[] CalculateRawSignature(AsymmetricKeyParameter privateKey, byte[] md5andsha1)
    {
      // Note: Only use the SHA1 part of the hash
      ISigner sig = new DsaDigestSigner(new DsaSigner(), new NullDigest());
      sig.Init(true, privateKey);
      sig.BlockUpdate(md5andsha1, 16, 20);
      return sig.GenerateSignature();
    }

    public ISigner CreateSigner()
    {
      return new DsaDigestSigner(new DsaSigner(), new Sha1Digest());
    }
  }
}