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/*-
* Copyright 2016 Vsevolod Stakhov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "config.h"
#include "rspamd.h"
#include "keypairs_cache.h"
#include "keypair_private.h"
#include "hash.h"
#include "xxhash.h"
struct rspamd_keypair_elt {
guchar nm[rspamd_cryptobox_MAX_NMBYTES];
guchar pair[rspamd_cryptobox_MAX_PKBYTES + rspamd_cryptobox_MAX_SKBYTES];
};
struct rspamd_keypair_cache {
rspamd_lru_hash_t *hash;
};
static void
rspamd_keypair_destroy (gpointer ptr)
{
struct rspamd_keypair_elt *elt = (struct rspamd_keypair_elt *)ptr;
rspamd_explicit_memzero (elt, sizeof (*elt));
g_slice_free1 (sizeof (*elt), elt);
}
static guint
rspamd_keypair_hash (gconstpointer ptr)
{
struct rspamd_keypair_elt *elt = (struct rspamd_keypair_elt *)ptr;
return XXH64 (elt->pair, sizeof (elt->pair), rspamd_hash_seed ());
}
static gboolean
rspamd_keypair_equal (gconstpointer p1, gconstpointer p2)
{
struct rspamd_keypair_elt *e1 = (struct rspamd_keypair_elt *)p1,
*e2 = (struct rspamd_keypair_elt *)p2;
return memcmp (e1->pair, e2->pair, sizeof (e1->pair)) == 0;
}
struct rspamd_keypair_cache *
rspamd_keypair_cache_new (guint max_items)
{
struct rspamd_keypair_cache *c;
g_assert (max_items > 0);
c = g_slice_alloc (sizeof (*c));
c->hash = rspamd_lru_hash_new_full (max_items, -1, NULL,
rspamd_keypair_destroy, rspamd_keypair_hash, rspamd_keypair_equal);
return c;
}
void
rspamd_keypair_cache_process (struct rspamd_keypair_cache *c,
gpointer lk, gpointer rk)
{
struct rspamd_http_keypair *kp_local = (struct rspamd_http_keypair *)lk,
*kp_remote = (struct rspamd_http_keypair *)rk;
struct rspamd_keypair_elt search, *new;
g_assert (kp_local != NULL);
g_assert (kp_remote != NULL);
memset (&search, 0, sizeof (search));
memcpy (search.pair, kp_remote->pk, rspamd_cryptobox_pk_bytes ());
memcpy (&search.pair[rspamd_cryptobox_MAX_PKBYTES], kp_local->sk,
rspamd_cryptobox_sk_bytes ());
new = rspamd_lru_hash_lookup (c->hash, &search, time (NULL));
if (new == NULL) {
new = g_slice_alloc0 (sizeof (*new));
memcpy (new->pair, kp_remote->pk, rspamd_cryptobox_pk_bytes ());
memcpy (&new->pair[rspamd_cryptobox_MAX_PKBYTES], kp_local->sk,
rspamd_cryptobox_sk_bytes ());
rspamd_cryptobox_nm (new->nm, kp_remote->pk, kp_local->sk);
rspamd_lru_hash_insert (c->hash, new, new, time (NULL), -1);
}
g_assert (new != NULL);
memcpy (kp_remote->nm, new->nm, rspamd_cryptobox_nm_bytes ());
kp_remote->has_nm = TRUE;
#if 0
memcpy (kp_local->nm, new->nm, rspamd_cryptobox_NMBYTES);
#endif
}
void
rspamd_keypair_cache_destroy (struct rspamd_keypair_cache *c)
{
if (c != NULL) {
rspamd_lru_hash_destroy (c->hash);
g_slice_free1 (sizeof (*c), c);
}
}
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