Recommendations for RSA in C++

[Roy M. Silvernail]

D'yer mind a code question? :)

I'm looking at doing a security module and want to use RSA  (but 
not PGP in general) for part of the protocol.  I'd appreciate pointers 
to RSA implementations, preferably in C++ but C is ok.  Free 
Source is a must.  (I don't think RSAREF is freely reusable, is it?)  

TIA

--
Roy M. Silvernail
Proprietor, scytale.com
roy at scytale.com