How fast is the 32 bit sse implementation of aes-gcm?

[kt-8]

I'm running the aes-gcm example project and I am putting a timer
around the following chunk of code in the main line (which as far as I
can tell captures the aes-gcm encoding):

        AuthenticatedEncryptionFilter ef( e,
            new StringSink( cipher ), false, TAG_SIZE
        ); // AuthenticatedEncryptionFilter

        // AuthenticatedEncryptionFilter::ChannelPut
        //  defines two channels: "" (empty) and "AAD"
        //   channel "" is encrypted and authenticated
        //   channel "AAD" is authenticated
        ef.ChannelPut( "AAD", (const byte*)adata.data(), adata.size
() );
        ef.ChannelMessageEnd("AAD");

        // Authenticated data *must* be pushed before
        //  Confidential/Authenticated data. Otherwise
        //  we must catch the BadState exception
        ef.ChannelPut( "", (const byte*)pdata.data(), pdata.size() );
        ef.ChannelMessageEnd("");

I'm seeing a performance of just under 1 Mbits/sec (using the
hardcoded test vector of 16 bytes of zero).  This is a far cry from
the ~800 Mbits/sec advertised.  Any ideas?

thanks.
kt

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[kt-8]

With some larger payloads (448 bytes and 896 bytes) and using the
release build (opps) I'm seeing ~30 Mbits/sec.  Getting better but
still very far from what's advertised.

On Aug 26, 11:20 am, kt <tucker...@...> wrote:

> I'm running the aes-gcm example project and I am putting a timer
> around the following chunk of code in the main line (which as far as I
> can tell captures the aes-gcm encoding):
>
>         AuthenticatedEncryptionFilter ef( e,
>             new StringSink( cipher ), false, TAG_SIZE
>         ); // AuthenticatedEncryptionFilter
>
>         // AuthenticatedEncryptionFilter::ChannelPut
>         //  defines two channels: "" (empty) and "AAD"
>         //   channel "" is encrypted and authenticated
>         //   channel "AAD" is authenticated
>         ef.ChannelPut( "AAD", (const byte*)adata.data(), adata.size
> () );
>         ef.ChannelMessageEnd("AAD");
>
>         // Authenticated data *must* be pushed before
>         //  Confidential/Authenticated data. Otherwise
>         //  we must catch the BadState exception
>         ef.ChannelPut( "", (const byte*)pdata.data(), pdata.size() );
>         ef.ChannelMessageEnd("");
>
> I'm seeing a performance of just under 1 Mbits/sec (using the
> hardcoded test vector of 16 bytes of zero).  This is a far cry from
> the ~800 Mbits/sec advertised.  Any ideas?
>
> thanks.
> kt

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