1 | /* $FreeBSD: src/sys/netinet6/ah.h,v 1.7 2002/04/19 04:46:22 suz Exp $ */ |
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2 | /* $KAME: ah.h,v 1.16 2001/09/04 08:43:19 itojun Exp $ */ |
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3 | |
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4 | /* |
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5 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
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6 | * All rights reserved. |
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7 | * |
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8 | * Redistribution and use in source and binary forms, with or without |
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9 | * modification, are permitted provided that the following conditions |
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10 | * are met: |
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11 | * 1. Redistributions of source code must retain the above copyright |
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12 | * notice, this list of conditions and the following disclaimer. |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * 3. Neither the name of the project nor the names of its contributors |
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17 | * may be used to endorse or promote products derived from this software |
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18 | * without specific prior written permission. |
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19 | * |
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20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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30 | * SUCH DAMAGE. |
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31 | */ |
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32 | |
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33 | /* |
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34 | * RFC1826/2402 authentication header. |
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35 | */ |
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36 | |
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37 | #ifndef _NETINET6_AH_H_ |
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38 | #define _NETINET6_AH_H_ |
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39 | |
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40 | #if defined(_KERNEL) && !defined(_LKM) |
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41 | #include "opt_inet.h" |
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42 | #endif |
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43 | |
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44 | struct ah { |
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45 | u_int8_t ah_nxt; /* Next Header */ |
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46 | u_int8_t ah_len; /* Length of data, in 32bit */ |
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47 | u_int16_t ah_reserve; /* Reserved for future use */ |
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48 | u_int32_t ah_spi; /* Security parameter index */ |
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49 | /* variable size, 32bit bound*/ /* Authentication data */ |
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50 | }; |
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51 | |
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52 | struct newah { |
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53 | u_int8_t ah_nxt; /* Next Header */ |
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54 | u_int8_t ah_len; /* Length of data + 1, in 32bit */ |
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55 | u_int16_t ah_reserve; /* Reserved for future use */ |
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56 | u_int32_t ah_spi; /* Security parameter index */ |
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57 | u_int32_t ah_seq; /* Sequence number field */ |
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58 | /* variable size, 32bit bound*/ /* Authentication data */ |
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59 | }; |
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60 | |
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61 | #ifdef _KERNEL |
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62 | struct secasvar; |
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63 | |
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64 | struct ah_algorithm_state { |
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65 | struct secasvar *sav; |
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66 | void* foo; /* per algorithm data - maybe */ |
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67 | }; |
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68 | |
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69 | struct ah_algorithm { |
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70 | int (*sumsiz) __P((struct secasvar *)); |
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71 | int (*mature) __P((struct secasvar *)); |
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72 | int keymin; /* in bits */ |
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73 | int keymax; /* in bits */ |
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74 | const char *name; |
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75 | int (*init) __P((struct ah_algorithm_state *, struct secasvar *)); |
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76 | void (*update) __P((struct ah_algorithm_state *, caddr_t, size_t)); |
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77 | void (*result) __P((struct ah_algorithm_state *, caddr_t)); |
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78 | }; |
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79 | |
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80 | #define AH_MAXSUMSIZE 16 |
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81 | |
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82 | extern const struct ah_algorithm *ah_algorithm_lookup __P((int)); |
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83 | |
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84 | /* cksum routines */ |
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85 | extern int ah_hdrlen __P((struct secasvar *)); |
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86 | |
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87 | extern size_t ah_hdrsiz __P((struct ipsecrequest *)); |
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88 | extern void ah4_input __P((struct mbuf *, int)); |
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89 | extern int ah4_output __P((struct mbuf *, struct ipsecrequest *)); |
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90 | extern int ah4_calccksum __P((struct mbuf *, caddr_t, size_t, |
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91 | const struct ah_algorithm *, struct secasvar *)); |
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92 | #endif /* _KERNEL */ |
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93 | |
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94 | #endif /* _NETINET6_AH_H_ */ |
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