static int nuron_init(ENGINE *e)
{
if(pvDSOHandle != NULL)
{
NURONerr(NURON_F_NURON_INIT,NURON_R_ALREADY_LOADED);
return 0;
}
pvDSOHandle = DSO_load(NULL, get_NURON_LIBNAME(), NULL,
DSO_FLAG_NAME_TRANSLATION_EXT_ONLY);
if(!pvDSOHandle)
{
NURONerr(NURON_F_NURON_INIT,NURON_R_DSO_NOT_FOUND);
return 0;
}
pfnModExp = (tfnModExp *)DSO_bind_func(pvDSOHandle, NURON_F1);
if(!pfnModExp)
{
NURONerr(NURON_F_NURON_INIT,NURON_R_DSO_FUNCTION_NOT_FOUND);
return 0;
}
return 1;
}
static int nuron_finish(ENGINE *e)
{
free_NURON_LIBNAME();
if (pvDSOHandle == NULL) {
NURONerr(NURON_F_NURON_FINISH, NURON_R_NOT_LOADED);
return 0;
}
if (!DSO_free(pvDSOHandle)) {
NURONerr(NURON_F_NURON_FINISH, NURON_R_DSO_FAILURE);
return 0;
}
pvDSOHandle = NULL;
pfnModExp = NULL;
return 1;
}
static int nuron_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx)
{
if (!pvDSOHandle) {
NURONerr(NURON_F_NURON_MOD_EXP, NURON_R_NOT_LOADED);
return 0;
}
return pfnModExp(r, a, p, m);
}
static int nuron_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
{
int initialised = ((pvDSOHandle == NULL) ? 0 : 1);
switch (cmd) {
case NURON_CMD_SO_PATH:
if (p == NULL) {
NURONerr(NURON_F_NURON_CTRL, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (initialised) {
NURONerr(NURON_F_NURON_CTRL, NURON_R_ALREADY_LOADED);
return 0;
}
return set_NURON_LIBNAME((const char *)p);
default:
break;
}
NURONerr(NURON_F_NURON_CTRL, NURON_R_CTRL_COMMAND_NOT_IMPLEMENTED);
return 0;
}
