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/*
* dhcpcd - DHCP client daemon
* Copyright (c) 2006-2015 Roy Marples <roy@marples.name>
* 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 AUTHOR 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 AUTHOR 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.
*/
#ifndef AUTH_H
#define AUTH_H
#include "config.h"
#ifdef HAVE_SYS_QUEUE_H
#include <sys/queue.h>
#endif
#define DHCPCD_AUTH_SEND (1 << 0)
#define DHCPCD_AUTH_REQUIRE (1 << 1)
#define DHCPCD_AUTH_RDM_COUNTER (1 << 2)
#define DHCPCD_AUTH_SENDREQUIRE (DHCPCD_AUTH_SEND | DHCPCD_AUTH_REQUIRE)
#define AUTH_PROTO_TOKEN 0
#define AUTH_PROTO_DELAYED 1
#define AUTH_PROTO_DELAYEDREALM 2
#define AUTH_PROTO_RECONFKEY 3
#define AUTH_ALG_HMAC_MD5 1
#define AUTH_RDM_MONOTONIC 0
struct token {
TAILQ_ENTRY(token) next;
uint32_t secretid;
size_t realm_len;
unsigned char *realm;
size_t key_len;
unsigned char *key;
time_t expire;
};
TAILQ_HEAD(token_head, token);
struct auth {
int options;
uint8_t protocol;
uint8_t algorithm;
uint8_t rdm;
uint64_t last_replay;
uint8_t last_replay_set;
struct token_head tokens;
};
struct authstate {
uint64_t replay;
struct token *token;
struct token *reconf;
};
void dhcp_auth_reset(struct authstate *);
const struct token * dhcp_auth_validate(struct authstate *,
const struct auth *,
const uint8_t *, size_t, int, int,
const uint8_t *, size_t);
ssize_t dhcp_auth_encode(struct auth *, const struct token *,
uint8_t *, size_t, int, int,
uint8_t *, size_t);
#endif
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