I don't think Crypto++ supports a null-hash there, and would personally never 
use NONEwithWhatever signing algorithm...

Sent from my iPad

> On Oct 22, 2015, at 08:37, Andrés Garagiola <andresgaragi...@gmail.com> wrote:
> 
> Hello,
> 
> What is the right way of create a signer to support signature equivalent to 
> the generated by java algorithm name "NONEwithECDSA"?
> 
>  
> CryptoPP::ECDSA<CryptoPP::ECP,CryptoPP::SHA1>::Signer signer(privateKey); 
> 
> The above example is equivalent to SHA1withECDSA but I don't know how 
> generate a signature like generated by NONEwithECDSA on Java.
> 
> Thanks
> Regards
> 
> 
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