Replacement for VerifierFilter::PutSignature()?

[David Grigsby]

Hello, this library is pretty impressive!

 

We've been using Crypto++ 4.1 with MSVC6/7 successfully.  We'd like to go to version 5.1 (with patch) on Visual Studio .NET 2003 (VC7.1).

 

I see that class VerifierFilter is now gone and is replaced with a typedef:

typedef SignatureVerificationFilter VerifierFilter; 

What construct should be used to replace old calls to PutSignature()?  For reference, here is the code we're using:

    {
        CryptoPP::StringSource ssPublicKey(szKey, true, new CryptoPP::HexDecoder);
     CryptoPP::RSASSA_PKCS1v15_SHA_Verifier pub(ssPublicKey);

        CryptoPP::StringSource ssSignature(&m_Signature[0], m_Signature.size(), true, new CryptoPP::HexDecoder);
        if (ssSignature.MaxRetrievable() == pub.SignatureLength())
        {
            CryptoPP::SecByteBlock sig(pub.SignatureLength());
            ssSignature.Get(sig, sig.size());

         CryptoPP::VerifierFilter *verifier = new CryptoPP::VerifierFilter(pub);
         verifier->PutSignature(sig);
            CryptoPP::StringSource ssBody(&m_Body[0], m_Body.size(), true, verifier);

         byte result = 0;
         ssBody.Get(result);
         return result == 1;
        }
    }

Should the call be replaced by something like:

PutMaybeModifiable( sig, sig.size(), 1, true, false); // ?

Thanks for your help!

David Grigsby

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