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