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[external/nettle.git] / nettle-types.h
1 /* nettle-types.h */
2
3 /* nettle, low-level cryptographics library
4  *
5  * Copyright (C) 2005 Niels Möller
6  *  
7  * The nettle library is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU Lesser General Public License as published by
9  * the Free Software Foundation; either version 2.1 of the License, or (at your
10  * option) any later version.
11  * 
12  * The nettle library is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
15  * License for more details.
16  * 
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with the nettle library; see the file COPYING.LIB.  If not, write to
19  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20  * MA 02111-1307, USA.
21  */
22
23 #ifndef NETTLE_TYPES_H
24 #define NETTLE_TYPES_H
25
26 #include "nettle-stdint.h"
27
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31
32 /* Randomness. Used by key generation and dsa signature creation. */
33 typedef void (nettle_random_func)(void *ctx,
34                                   unsigned length, uint8_t *dst);
35
36 /* Progress report function, mainly for key generation. */
37 typedef void (nettle_progress_func)(void *ctx,
38                                     int c);
39
40 /* Ciphers */
41 typedef void (nettle_set_key_func)(void *ctx,
42                                    unsigned length,
43                                    const uint8_t *key);
44
45 /* Uses a void * for cipher contexts.
46
47    For block ciphers it would make sense with a const void * for the
48    context, but we use the same typedef for stream ciphers where the
49    internal state changes during the encryption. */
50
51 typedef void (nettle_crypt_func)(void *ctx,
52                                  unsigned length, uint8_t *dst,
53                                  const uint8_t *src);
54
55 /* Hash algorithms */
56 typedef void (nettle_hash_init_func)(void *ctx);
57 typedef void (nettle_hash_update_func)(void *ctx,
58                                        unsigned length,
59                                        const uint8_t *src);
60 typedef void (nettle_hash_digest_func)(void *ctx,
61                                        unsigned length, uint8_t *dst);
62
63 /* ASCII armor codecs. NOTE: Experimental and subject to change. */
64
65 typedef unsigned (nettle_armor_length_func)(unsigned length);
66 typedef void (nettle_armor_init_func)(void *ctx);
67
68 typedef unsigned (nettle_armor_encode_update_func)(void *ctx,
69                                                    uint8_t *dst,
70                                                    unsigned src_length,
71                                                    const uint8_t *src);
72
73 typedef unsigned (nettle_armor_encode_final_func)(void *ctx, uint8_t *dst);
74
75 typedef int (nettle_armor_decode_update_func)(void *ctx,
76                                               unsigned *dst_length,
77                                               uint8_t *dst,
78                                               unsigned src_length,
79                                               const uint8_t *src);
80
81 typedef int (nettle_armor_decode_final_func)(void *ctx);
82
83 #ifdef __cplusplus
84 }
85 #endif
86
87 #endif /* NETTLE_TYPES_H */