void rsa_os2ip(bigint_t* dest, const void* data, uint32_t length_B);
void rsa_i2osp(void* dest, bigint_t* src, uint16_t* out_length_B);
void rsa_os2ip(bigint_t* dest, const void* data, uint32_t length_B);
void rsa_i2osp(void* dest, bigint_t* src, uint16_t* out_length_B);