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aa1082f2 | 1 | /* -*-c-*- |
2 | * | |
e2edda68 | 3 | * $Id: gcipher.h,v 1.5 2004/04/21 00:37:32 mdw Exp $ |
aa1082f2 | 4 | * |
5 | * Generic symmetric cipher interface | |
6 | * | |
7 | * (c) 1999 Straylight/Edgeware | |
8 | */ | |
9 | ||
45c0fd36 | 10 | /*----- Licensing notice --------------------------------------------------* |
aa1082f2 | 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. | |
45c0fd36 | 18 | * |
aa1082f2 | 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. | |
45c0fd36 | 23 | * |
aa1082f2 | 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 | ||
aa1082f2 | 30 | #ifndef CATACOMB_GCIPHER_H |
31 | #define CATACOMB_GCIPHER_H | |
32 | ||
33 | #ifdef __cplusplus | |
34 | extern "C" { | |
35 | #endif | |
36 | ||
37 | /*----- Header files ------------------------------------------------------*/ | |
38 | ||
39 | #include <stddef.h> | |
40 | ||
b7e9df9c | 41 | #include <mLib/bits.h> |
aa1082f2 | 42 | |
c61ee18c MW |
43 | #ifndef CATACOMB_KEYSZ_H |
44 | # include "keysz.h" | |
45 | #endif | |
46 | ||
b7e9df9c | 47 | /*----- Generic symmetric cipher interface --------------------------------*/ |
aa1082f2 | 48 | |
49 | typedef struct gcipher { | |
50 | const struct gcipher_ops *ops; /* Pointer to cipher operations */ | |
51 | } gcipher; | |
52 | ||
53 | typedef struct gcipher_ops { | |
b7e9df9c | 54 | const struct gccipher *c; /* Pointer to cipher class */ |
aa1082f2 | 55 | void (*encrypt)(gcipher */*c*/, const void */*s*/, |
56 | void */*t*/, size_t /*sz*/); | |
57 | void (*decrypt)(gcipher */*c*/, const void */*s*/, | |
58 | void */*t*/, size_t /*sz*/); | |
59 | void (*destroy)(gcipher */*c*/); | |
60 | void (*setiv)(gcipher */*c*/, const void */*iv*/); | |
61 | void (*bdry)(gcipher */*c*/); | |
62 | } gcipher_ops; | |
63 | ||
64 | typedef struct gccipher { | |
b7e9df9c | 65 | const char *name; /* Cipher name */ |
66 | const octet *keysz; /* Preferred key size table */ | |
67 | size_t blksz; /* Block size or zero if none */ | |
aa1082f2 | 68 | gcipher *(*init)(const void */*k*/, size_t /*sz*/); |
69 | } gccipher; | |
70 | ||
59919ae4 | 71 | #define GC_INIT(cc, k, sz) (cc)->init((k), (sz)) |
e2edda68 | 72 | #define GC_CLASS(cc) (cc)->ops->c |
59919ae4 | 73 | #define GC_ENCRYPT(c, s, t, sz) (c)->ops->encrypt((c), (s), (t), (sz)) |
74 | #define GC_DECRYPT(c, s, t, sz) (c)->ops->decrypt((c), (s), (t), (sz)) | |
75 | #define GC_DESTROY(c) (c)->ops->destroy((c)) | |
76 | #define GC_SETIV(c, iv) (c)->ops->setiv((c), (iv)) | |
77 | #define GC_BDRY(c) (c)->ops->bdry((c)) | |
78 | ||
59919ae4 | 79 | /*----- Tables ------------------------------------------------------------*/ |
80 | ||
81 | extern const gccipher *const gciphertab[]; | |
82 | ||
83 | /* --- @gcipher_byname@ --- * | |
84 | * | |
85 | * Arguments: @const char *p@ = pointer to name string | |
86 | * | |
87 | * Returns: The named cipher class, or null. | |
88 | */ | |
89 | ||
90 | extern const gccipher *gcipher_byname(const char */*p*/); | |
91 | ||
aa1082f2 | 92 | /*----- That's all, folks -------------------------------------------------*/ |
93 | ||
94 | #ifdef __cplusplus | |
95 | } | |
96 | #endif | |
97 | ||
98 | #endif |