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c73ed17160
Implement RFC 2104 HMAC Keyed Hashing. Implement RFC 3118 Authentication for DHCP Messages and RFC 3315 Authentication options.
80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/*
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* dhcpcd - DHCP client daemon
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* Copyright (c) 2006-2014 Roy Marples <roy@marples.name>
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* All rights reserved
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef AUTH_H
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#define AUTH_H
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#include <sys/queue.h>
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#define DHCPCD_AUTH_SEND (1 << 0)
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#define DHCPCD_AUTH_REQUIRE (1 << 1)
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#define AUTH_PROTO_TOKEN 0
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#define AUTH_PROTO_DELAYED 1
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#define AUTH_PROTO_DELAYEDREALM 2
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#define AUTH_PROTO_RECONFKEY 3
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#define AUTH_ALG_HMAC_MD5 1
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#define AUTH_RDM_MONOTONIC 0
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struct token {
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TAILQ_ENTRY(token) next;
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uint32_t secretid;
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unsigned int realm_len;
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unsigned char *realm;
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unsigned int key_len;
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unsigned char *key;
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time_t expire;
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};
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TAILQ_HEAD(token_head, token);
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struct auth {
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int options;
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uint8_t protocol;
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uint8_t algorithm;
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uint8_t rdm;
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struct token_head tokens;
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};
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struct authstate {
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uint64_t replay;
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const struct token *token;
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struct token *reconf;
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};
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const struct token * dhcp_auth_validate(struct authstate *,
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const struct auth *,
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const uint8_t *, unsigned int, int, int,
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const uint8_t *, unsigned int);
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int dhcp_auth_encode(const struct auth *, const struct token *,
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uint8_t *, unsigned int, int, int,
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uint8_t *, unsigned int);
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#endif
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