Oscam Implementation RSA

I want put 2 nagra values in hex format boxkey and rsakey in [login to view URL] file. This values not are real values because i previosly make encrypted with my modulus D and N (this process i make in Windows PC with special tool) So i want implemented in oscam source rsa function for decrypt this boxkey and rsakey (encrypted previosly with my privates keys N, D). This keys must be decrypt in memory with my public key (N) and public exponent (11) and the result must be saved in the boxkey and rsakey for its normal treatment.