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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: gmac.h,v 1.3 2004/04/04 19:42:30 mdw Exp $ |
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4 | * |
5 | * Generic MAC function interface |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: gmac.h,v $ |
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33 | * Revision 1.3 2004/04/04 19:42:30 mdw |
34 | * Make tables of standard encryption schemes etc. |
35 | * |
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36 | * Revision 1.2 2000/06/17 11:22:46 mdw |
37 | * Minor changes in the generic hash and MAC interfaces. |
38 | * |
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39 | * Revision 1.1 1999/12/10 23:16:01 mdw |
40 | * Generic interface. |
41 | * |
42 | */ |
43 | |
44 | #ifndef CATACOMB_GMAC_H |
45 | #define CATACOMB_GMAC_H |
46 | |
47 | #ifdef __cplusplus |
48 | extern "C" { |
49 | #endif |
50 | |
51 | /*----- Header files ------------------------------------------------------*/ |
52 | |
53 | #include <stddef.h> |
54 | |
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55 | #ifndef CATACOMB_GCIPHER_H |
56 | # include "gcipher.h" |
57 | #endif |
58 | |
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59 | #ifndef CATACOMB_GHASH_H |
60 | # include "ghash.h" |
61 | #endif |
62 | |
63 | /*----- Generic MAC function interface ------------------------------------*/ |
64 | |
65 | typedef struct gmac { |
66 | const struct gmac_ops *ops; /* Pointer to MAC operations */ |
67 | } gmac; |
68 | |
69 | typedef struct gmac_ops { |
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70 | const struct gcmac *c; /* Pointer to MAC class */ |
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71 | ghash *(*init)(gmac */*m*/); /* Create keyed hash instance */ |
72 | void (*destroy)(gmac */*m*/); /* Destroy MAC key block */ |
73 | } gmac_ops; |
74 | |
75 | typedef struct gcmac { |
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76 | const char *name; /* Name of the MAC function */ |
77 | size_t hashsz; /* Size of output hash */ |
78 | const octet *keysz; /* Key size options */ |
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79 | gmac *(*key)(const void */*k*/, size_t /*sz*/); /* Create key */ |
80 | } gcmac; |
81 | |
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82 | #define GM_KEY(cm, k, ksz) (cm)->key((k), (ksz)) |
83 | #define GM_CLASS(km) (km)->ops->c |
84 | #define GM_INIT(km) (km)->ops->init((km)) |
85 | #define GM_DESTROY(km) (km)->ops->destroy((km)) |
86 | |
87 | /*----- Tables ------------------------------------------------------------*/ |
88 | |
89 | extern const gcmac *const gmactab[]; |
90 | |
91 | /* --- @gmac_byname@ --- * |
92 | * |
93 | * Arguments: @const char *p@ = pointer to name string |
94 | * |
95 | * Returns: The named cipher class, or null. |
96 | */ |
97 | |
98 | extern const gcmac *gmac_byname(const char */*p*/); |
99 | |
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100 | /*----- That's all, folks -------------------------------------------------*/ |
101 | |
102 | #ifdef __cplusplus |
103 | } |
104 | #endif |
105 | |
106 | #endif |