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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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