/*
* Probe for the availability of crypto algorithms, and set the available
* flag for any algorithms found on the system. This is typically called by
* pfkey during userspace SA add, update or register.
*/
void xfrm_probe_algs(void)
{
#ifdef CONFIG_CRYPTO
int i, status;
BUG_ON(in_softirq());
for (i = 0; i < aalg_entries(); i++) {
status = crypto_alg_available(aalg_list[i].name, 0);
if (aalg_list[i].available != status)
aalg_list[i].available = status;
}
for (i = 0; i < ealg_entries(); i++) {
status = crypto_alg_available(ealg_list[i].name, 0);
if (ealg_list[i].available != status)
ealg_list[i].available = status;
}
for (i = 0; i < calg_entries(); i++) {
status = crypto_alg_available(calg_list[i].name, 0);
if (calg_list[i].available != status)
calg_list[i].available = status;
}
#endif
}
struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx)
{
if (idx >= aalg_entries())
return NULL;
return &aalg_list[idx];
}
int xfrm_count_auth_supported(void)
{
int i, n;
for (i = 0, n = 0; i < aalg_entries(); i++)
if (aalg_list[i].available)
n++;
return n;
}
/* Todo: generic iterators */
struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
{
int i;
for (i = 0; i < aalg_entries(); i++) {
if (aalg_list[i].desc.sadb_alg_id == alg_id) {
if (aalg_list[i].available)
return &aalg_list[i];
else
break;
}
}
return NULL;
}
struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name)
{
int i;
if (!name)
return NULL;
for (i=0; i < aalg_entries(); i++) {
if (strcmp(name, aalg_list[i].name) == 0) {
if (aalg_list[i].available)
return &aalg_list[i];
else
break;
}
}
return NULL;
}
struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe)
{
return xfrm_get_byname(aalg_list, aalg_entries(), name, probe);
}
struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe)
{
return xfrm_get_byname(aalg_list, aalg_entries(), name,
NCRYPTO_ALG_TYPE_HASH,
NCRYPTO_ALG_TYPE_HASH_MASK, probe);
}
