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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: gmac.h,v 1.4 2004/04/08 01:36:15 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 | |
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30 | #ifndef CATACOMB_GMAC_H |
31 | #define CATACOMB_GMAC_H |
32 | |
33 | #ifdef __cplusplus |
34 | extern "C" { |
35 | #endif |
36 | |
37 | /*----- Header files ------------------------------------------------------*/ |
38 | |
39 | #include <stddef.h> |
40 | |
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41 | #ifndef CATACOMB_GCIPHER_H |
42 | # include "gcipher.h" |
43 | #endif |
44 | |
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45 | #ifndef CATACOMB_GHASH_H |
46 | # include "ghash.h" |
47 | #endif |
48 | |
49 | /*----- Generic MAC function interface ------------------------------------*/ |
50 | |
51 | typedef struct gmac { |
52 | const struct gmac_ops *ops; /* Pointer to MAC operations */ |
53 | } gmac; |
54 | |
55 | typedef struct gmac_ops { |
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56 | const struct gcmac *c; /* Pointer to MAC class */ |
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57 | ghash *(*init)(gmac */*m*/); /* Create keyed hash instance */ |
58 | void (*destroy)(gmac */*m*/); /* Destroy MAC key block */ |
59 | } gmac_ops; |
60 | |
61 | typedef struct gcmac { |
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62 | const char *name; /* Name of the MAC function */ |
63 | size_t hashsz; /* Size of output hash */ |
64 | const octet *keysz; /* Key size options */ |
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65 | gmac *(*key)(const void */*k*/, size_t /*sz*/); /* Create key */ |
66 | } gcmac; |
67 | |
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68 | #define GM_KEY(cm, k, ksz) (cm)->key((k), (ksz)) |
69 | #define GM_CLASS(km) (km)->ops->c |
70 | #define GM_INIT(km) (km)->ops->init((km)) |
71 | #define GM_DESTROY(km) (km)->ops->destroy((km)) |
72 | |
73 | /*----- Tables ------------------------------------------------------------*/ |
74 | |
75 | extern const gcmac *const gmactab[]; |
76 | |
77 | /* --- @gmac_byname@ --- * |
78 | * |
79 | * Arguments: @const char *p@ = pointer to name string |
80 | * |
81 | * Returns: The named cipher class, or null. |
82 | */ |
83 | |
84 | extern const gcmac *gmac_byname(const char */*p*/); |
85 | |
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86 | /*----- That's all, folks -------------------------------------------------*/ |
87 | |
88 | #ifdef __cplusplus |
89 | } |
90 | #endif |
91 | |
92 | #endif |