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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: ghash.h,v 1.5 2000/07/15 10:00:58 mdw Exp $ |
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4 | * |
5 | * Generic hash 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: ghash.h,v $ |
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33 | * Revision 1.5 2000/07/15 10:00:58 mdw |
34 | * New generic hash operation for copying hash contexts. |
35 | * |
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36 | * Revision 1.4 2000/07/03 18:08:24 mdw |
37 | * Include `bits.h'. |
38 | * |
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39 | * Revision 1.3 2000/07/02 18:27:42 mdw |
40 | * (ghash->ops->done): Interface change. Passing in a null buffer pointer |
41 | * uses a buffer internal to the ghash object. The operation returns the |
42 | * address of the buffer it used. Clients of generic hashes no longer need |
43 | * to use dynamically allocated memory for hash results. |
44 | * |
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45 | * Revision 1.2 2000/06/17 11:22:17 mdw |
46 | * Minor changes in the generic hash interface. |
47 | * |
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48 | * Revision 1.1 1999/12/10 23:16:01 mdw |
49 | * Generic interface. |
50 | * |
51 | */ |
52 | |
53 | #ifndef CATACOMB_GHASH_H |
54 | #define CATACOMB_GHASH_H |
55 | |
56 | #ifdef __cplusplus |
57 | extern "C" { |
58 | #endif |
59 | |
60 | /*----- Header files ------------------------------------------------------*/ |
61 | |
62 | #include <stddef.h> |
63 | |
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64 | #include <mLib/bits.h> |
65 | |
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66 | /*----- Generic hash function interface -----------------------------------*/ |
67 | |
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68 | typedef struct ghash { |
69 | const struct ghash_ops *ops; /* Pointer to hash operations */ |
70 | } ghash; |
71 | |
72 | typedef struct ghash_ops { |
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73 | const struct gchash *c; /* Pointer to hash class */ |
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74 | void (*hash)(ghash */*h*/, const void */*p*/, size_t /*sz*/); /* Hash */ |
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75 | octet *(*done)(ghash */*h*/, void */*buf*/); /* Write result */ |
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76 | void (*destroy)(ghash */*h*/); /* Destroy hash block */ |
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77 | ghash *(*copy)(ghash */*h*/); /* Make a copy of the hash context */ |
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78 | } ghash_ops; |
79 | |
80 | typedef struct gchash { |
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81 | const char *name; /* Name of the hash function */ |
82 | size_t hashsz; /* Size of output hash */ |
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83 | ghash *(*init)(void); /* Create a new hash instance */ |
84 | } gchash; |
85 | |
86 | /*----- That's all, folks -------------------------------------------------*/ |
87 | |
88 | #ifdef __cplusplus |
89 | } |
90 | #endif |
91 | |
92 | #endif |