Separate ec25519-fhmqvc into multiple source files

1 files changed, 100 insertions, 0 deletions

diff --git a/src/protocols/ec25519_fhmqvc/state.c b/src/protocols/ec25519_fhmqvc/state.c
new file mode 100644
index 0000000..e5ccb8d
--- /dev/null
+++ b/src/protocols/ec25519_fhmqvc/state.c
@@ -0,0 +1,100 @@
+/*
+  Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "ec25519_fhmqvc.h"
+
+
+static void init_protocol_state(fastd_context_t *ctx) {
+	if (!ctx->protocol_state) {
+		ctx->protocol_state = calloc(1, sizeof(fastd_protocol_state_t));
+
+		ctx->protocol_state->prev_handshake_key.preferred_till = ctx->conf->long_ago;
+		ctx->protocol_state->handshake_key.preferred_till = ctx->conf->long_ago;
+	}
+}
+
+static void new_handshake_key(fastd_context_t *ctx, keypair_t *key) {
+		fastd_random_bytes(ctx, key->secret.p, 32, false);
+		ecc_25519_gf_sanitize_secret(&key->secret, &key->secret);
+
+		ecc_25519_work_t work;
+		ecc_25519_scalarmult_base(&work, &key->secret);
+		ecc_25519_store_packed(&key->public, &work);
+}
+
+void fastd_protocol_ec25519_fhmqvc_maintenance(fastd_context_t *ctx) {
+	init_protocol_state(ctx);
+
+	if (!is_handshake_key_preferred(ctx, &ctx->protocol_state->handshake_key)) {
+		pr_debug(ctx, "generating new handshake key");
+
+		ctx->protocol_state->prev_handshake_key = ctx->protocol_state->handshake_key;
+
+		ctx->protocol_state->handshake_key.serial++;
+
+		new_handshake_key(ctx, &ctx->protocol_state->handshake_key.key1);
+		new_handshake_key(ctx, &ctx->protocol_state->handshake_key.key2);
+
+		ctx->protocol_state->handshake_key.preferred_till = ctx->now;
+		ctx->protocol_state->handshake_key.preferred_till.tv_sec += 15;
+
+		ctx->protocol_state->handshake_key.valid_till = ctx->now;
+		ctx->protocol_state->handshake_key.valid_till.tv_sec += 30;
+	}
+}
+
+void fastd_protocol_ec25519_fhmqvc_init_peer_state(fastd_context_t *ctx, fastd_peer_t *peer) {
+	init_protocol_state(ctx);
+
+	if (peer->protocol_state)
+		exit_bug(ctx, "tried to reinit peer state");
+
+	peer->protocol_state = calloc(1, sizeof(fastd_protocol_peer_state_t));
+	peer->protocol_state->last_serial = ctx->protocol_state->handshake_key.serial;
+}
+
+static void reset_session(fastd_context_t *ctx, protocol_session_t *session) {
+	if (session->method)
+		session->method->session_free(ctx, session->method_state);
+	secure_memzero(session, sizeof(protocol_session_t));
+}
+
+void fastd_protocol_ec25519_fhmqvc_reset_peer_state(fastd_context_t *ctx, fastd_peer_t *peer) {
+	if (!peer->protocol_state)
+		return;
+
+	reset_session(ctx, &peer->protocol_state->old_session);
+	reset_session(ctx, &peer->protocol_state->session);
+}
+
+void fastd_protocol_ec25519_fhmqvc_free_peer_state(fastd_context_t *ctx, fastd_peer_t *peer) {
+	if (peer->protocol_state) {
+		reset_session(ctx, &peer->protocol_state->old_session);
+		reset_session(ctx, &peer->protocol_state->session);
+
+		free(peer->protocol_state);
+	}
+}