extern size_t rsa_size(rsa_t *rsa);
extern bool rsa_public_encrypt(rsa_t *rsa, void *in, size_t inlen, void *out);
extern bool rsa_private_decrypt(rsa_t *rsa, void *in, size_t inlen, void *out);
extern size_t rsa_size(rsa_t *rsa);
extern bool rsa_public_encrypt(rsa_t *rsa, void *in, size_t inlen, void *out);
extern bool rsa_private_decrypt(rsa_t *rsa, void *in, size_t inlen, void *out);