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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 "keypairs_cache.h"
#include "keypair_private.h"
#include "libutil/util.h"
#include "hash.h"
struct rspamd_keypair_elt {
struct rspamd_cryptobox_nm *nm;
guchar pair[rspamd_cryptobox_HASHBYTES * 2];
};
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;
REF_RELEASE (elt->nm);
g_free (elt);
}
static guint
rspamd_keypair_hash (gconstpointer ptr)
{
struct rspamd_keypair_elt *elt = (struct rspamd_keypair_elt *)ptr;
return rspamd_cryptobox_fast_hash (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_malloc0 (sizeof (*c));
c->hash = rspamd_lru_hash_new_full (max_items, NULL,
rspamd_keypair_destroy, rspamd_keypair_hash, rspamd_keypair_equal);
return c;
}
void
rspamd_keypair_cache_process (struct rspamd_keypair_cache *c,
struct rspamd_cryptobox_keypair *lk,
struct rspamd_cryptobox_pubkey *rk)
{
struct rspamd_keypair_elt search, *new;
g_assert (lk != NULL);
g_assert (rk != NULL);
g_assert (rk->alg == lk->alg);
g_assert (rk->type == lk->type);
g_assert (rk->type == RSPAMD_KEYPAIR_KEX);
memset (&search, 0, sizeof (search));
memcpy (search.pair, rk->id, rspamd_cryptobox_HASHBYTES);
memcpy (&search.pair[rspamd_cryptobox_HASHBYTES], lk->id,
rspamd_cryptobox_HASHBYTES);
new = rspamd_lru_hash_lookup (c->hash, &search, time (NULL));
if (rk->nm) {
REF_RELEASE (rk->nm);
rk->nm = NULL;
}
if (new == NULL) {
new = g_malloc0 (sizeof (*new));
if (posix_memalign ((void **)&new->nm, 32, sizeof (*new->nm)) != 0) {
abort ();
}
REF_INIT_RETAIN (new->nm, rspamd_cryptobox_nm_dtor);
memcpy (new->pair, rk->id, rspamd_cryptobox_HASHBYTES);
memcpy (&new->pair[rspamd_cryptobox_HASHBYTES], lk->id,
rspamd_cryptobox_HASHBYTES);
memcpy (&new->nm->sk_id, lk->id, sizeof (guint64));
if (rk->alg == RSPAMD_CRYPTOBOX_MODE_25519) {
struct rspamd_cryptobox_pubkey_25519 *rk_25519 =
RSPAMD_CRYPTOBOX_PUBKEY_25519(rk);
struct rspamd_cryptobox_keypair_25519 *sk_25519 =
RSPAMD_CRYPTOBOX_KEYPAIR_25519(lk);
rspamd_cryptobox_nm (new->nm->nm, rk_25519->pk, sk_25519->sk, rk->alg);
}
else {
struct rspamd_cryptobox_pubkey_nist *rk_nist =
RSPAMD_CRYPTOBOX_PUBKEY_NIST(rk);
struct rspamd_cryptobox_keypair_nist *sk_nist =
RSPAMD_CRYPTOBOX_KEYPAIR_NIST(lk);
rspamd_cryptobox_nm (new->nm->nm, rk_nist->pk, sk_nist->sk, rk->alg);
}
rspamd_lru_hash_insert (c->hash, new, new, time (NULL), -1);
}
g_assert (new != NULL);
rk->nm = new->nm;
REF_RETAIN (rk->nm);
}
void
rspamd_keypair_cache_destroy (struct rspamd_keypair_cache *c)
{
if (c != NULL) {
rspamd_lru_hash_destroy (c->hash);
g_free (c);
}
}
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