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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: ghash.h,v 1.7 2004/04/08 01:36:15 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 | |
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30 | #ifndef CATACOMB_GHASH_H |
31 | #define CATACOMB_GHASH_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 | #include <mLib/bits.h> |
42 | |
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43 | /*----- Generic hash function interface -----------------------------------*/ |
44 | |
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45 | typedef struct ghash { |
46 | const struct ghash_ops *ops; /* Pointer to hash operations */ |
47 | } ghash; |
48 | |
49 | typedef struct ghash_ops { |
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50 | const struct gchash *c; /* Pointer to hash class */ |
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51 | void (*hash)(ghash */*h*/, const void */*p*/, size_t /*sz*/); /* Hash */ |
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52 | octet *(*done)(ghash */*h*/, void */*buf*/); /* Write result */ |
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53 | void (*destroy)(ghash */*h*/); /* Destroy hash block */ |
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54 | ghash *(*copy)(ghash */*h*/); /* Make a copy of the hash context */ |
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55 | } ghash_ops; |
56 | |
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57 | #define GH_INIT(ch) (ch)->init() |
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58 | #define GH_CLASS(h) (h)->ops->c |
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59 | #define GH_HASH(h, p, sz) (h)->ops->hash((h), (p), (sz)) |
60 | #define GH_DONE(h, buf) (h)->ops->done((h), (buf)) |
61 | #define GH_DESTROY(h) (h)->ops->destroy((h)) |
62 | #define GH_COPY(h) (h)->ops->copy((h)) |
63 | |
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64 | typedef struct gchash { |
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65 | const char *name; /* Name of the hash function */ |
66 | size_t hashsz; /* Size of output hash */ |
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67 | ghash *(*init)(void); /* Create a new hash instance */ |
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68 | size_t bufsz; /* Buffer size, or zero */ |
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69 | } gchash; |
70 | |
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71 | /*----- Tables ------------------------------------------------------------*/ |
72 | |
73 | extern const gchash *const ghashtab[]; |
74 | |
75 | /* --- @ghash_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 gchash *ghash_byname(const char */*p*/); |
83 | |
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84 | /*----- That's all, folks -------------------------------------------------*/ |
85 | |
86 | #ifdef __cplusplus |
87 | } |
88 | #endif |
89 | |
90 | #endif |