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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;
- unsigned char 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 unsigned int
- 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(unsigned int 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(uint64_t));
-
- 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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