Start keypair framework conversion

1 files changed, 114 insertions, 0 deletions

diff --git a/src/libcryptobox/keypairs_cache.c b/src/libcryptobox/keypairs_cache.c
new file mode 100644
index 000000000..2e87561da
--- /dev/null
+++ b/src/libcryptobox/keypairs_cache.c
@@ -0,0 +1,114 @@
+/*-
+ * 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);
+	}
+}