overload key signing function for opensc tokens...

[Markus Friedl]

On Mon, Apr 07, 2003 at 12:25:12PM -0500, Kevin Stefanik wrote:
> My best guess... openssl immediately uses the engine if RSA_FLAG_SIGN_VER flag 
> is set - it doesn't check if there is an engine defined.   In this case, in 
> my debugging, rsa.engine is 0x0 and the ENGINE_get_RSA() called from  
> RSA_sign call doesn't verify it before referencing an element of the 
> structure, so it segfaults.  
> 
> Would a cleaner patch be to use the sc_get_engine() and assign an engine?  
> That doesn't seem to be happening in sc_read_pubkey at the moment.  In fact, 
> I can't see that sc_get_engine is called anywhere.   I'm currently using 
> 0.9.7a, so shouldn't USE_ENGINE be undefined?  What if there's no USE_ENGINE?  
USE_ENGINE is for the 0.9.6-engine interface.

in 0.9.7 the engine interface was removed.