Start of "Simple Peer-To-Peer Security" protocol.

[tinc] / src / sptps.h

diff --git a/src/sptps.h b/src/sptps.h
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+/*
+    sptps.h -- Simple Peer-to-Peer Security
+    Copyright (C) 2011 Guus Sliepen <guus@tinc-vpn.org>,
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "system.h"
+
+#include "cipher.h"
+#include "digest.h"
+#include "ecdh.h"
+#include "ecdsa.h"
+
+#define STATE_FIRST_KEX 0 // Waiting for peer's ECDHE pubkey
+#define STATE_NORMAL 1
+#define STATE_WAIT_KEX 2 // Waiting for peer's ECDHE pubkey
+#define STATE_WAIT_ACK 3 // Waiting for peer's acknowledgement of pubkey reception
+
+typedef bool (*send_data_t)(void *handle, const char *data, size_t len);
+typedef bool (*receive_record_t)(void *handle, uint8_t type, const char *data, uint16_t len);
+
+typedef struct sptps {
+       bool initiator;
+       int state;
+
+       char *inbuf;
+       size_t buflen;
+
+       cipher_t incipher;
+       digest_t indigest;
+       uint32_t inseqno;
+
+       cipher_t outcipher;
+       digest_t outdigest;
+       uint32_t outseqno;
+
+       ecdsa_t mykey;
+       ecdsa_t hiskey;
+       ecdh_t ecdh;
+
+       char *myrandom;
+       char *key;
+       char *label;
+       size_t labellen;
+
+       void *handle;
+       send_data_t send_data;
+       receive_record_t receive_record;
+} sptps_t;
+
+extern bool start_sptps(sptps_t *s, void *handle, bool initiator, ecdsa_t mykey, ecdsa_t hiskey, const char *label, size_t labellen, send_data_t send_data, receive_record_t receive_record);
+extern bool stop_sptps(sptps_t *s);
+extern bool send_record(sptps_t *s, uint8_t type, const char *data, uint16_t len);
+extern bool receive_data(sptps_t *s, const char *data, size_t len);