66f325f467
In send_sptps_data(), the len variable contains the length of the whole datagram that needs to be sent to the peer, including the overhead from SPTPS itself.
95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/*
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sptps.h -- Simple Peer-to-Peer Security
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Copyright (C) 2011-2013 Guus Sliepen <guus@tinc-vpn.org>,
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __SPTPS_H__
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#define __SPTPS_H__
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#include "system.h"
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#include "chacha-poly1305/chacha-poly1305.h"
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#include "ecdh.h"
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#include "ecdsa.h"
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#define SPTPS_VERSION 0
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// Record types
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#define SPTPS_HANDSHAKE 128 // Key exchange and authentication
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#define SPTPS_ALERT 129 // Warning or error messages
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#define SPTPS_CLOSE 130 // Application closed the connection
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// Key exchange states
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#define SPTPS_KEX 1 // Waiting for the first Key EXchange record
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#define SPTPS_SECONDARY_KEX 2 // Ready to receive a secondary Key EXchange record
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#define SPTPS_SIG 3 // Waiting for a SIGnature record
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#define SPTPS_ACK 4 // Waiting for an ACKnowledgement record
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// Overhead for datagrams
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#define SPTPS_DATAGRAM_OVERHEAD 21
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typedef bool (*send_data_t)(void *handle, uint8_t type, const char *data, size_t len);
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typedef bool (*receive_record_t)(void *handle, uint8_t type, const char *data, uint16_t len);
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typedef struct sptps {
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bool initiator;
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bool datagram;
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int state;
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char *inbuf;
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size_t buflen;
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uint16_t reclen;
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bool instate;
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chacha_poly1305_ctx_t *incipher;
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uint32_t inseqno;
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uint32_t received;
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unsigned int replaywin;
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unsigned int farfuture;
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char *late;
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bool outstate;
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chacha_poly1305_ctx_t *outcipher;
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uint32_t outseqno;
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ecdsa_t *mykey;
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ecdsa_t *hiskey;
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ecdh_t *ecdh;
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char *mykex;
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char *hiskex;
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char *key;
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char *label;
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size_t labellen;
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void *handle;
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send_data_t send_data;
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receive_record_t receive_record;
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} sptps_t;
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extern unsigned int sptps_replaywin;
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extern void sptps_log_quiet(sptps_t *s, int s_errno, const char *format, va_list ap);
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extern void sptps_log_stderr(sptps_t *s, int s_errno, const char *format, va_list ap);
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extern void (*sptps_log)(sptps_t *s, int s_errno, const char *format, va_list ap);
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extern bool sptps_start(sptps_t *s, void *handle, bool initiator, bool datagram, ecdsa_t *mykey, ecdsa_t *hiskey, const char *label, size_t labellen, send_data_t send_data, receive_record_t receive_record);
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extern bool sptps_stop(sptps_t *s);
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extern bool sptps_send_record(sptps_t *s, uint8_t type, const char *data, uint16_t len);
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extern bool sptps_receive_data(sptps_t *s, const char *data, size_t len);
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extern bool sptps_force_kex(sptps_t *s);
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extern bool sptps_verify_datagram(sptps_t *s, const char *data, size_t len);
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#endif
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