1 | /* cast128.h |
2 | |
3 | The CAST-128 block cipher. |
4 | |
5 | Copyright (C) 2001, 2014 Niels Möller |
6 | |
7 | This file is part of GNU Nettle. |
8 | |
9 | GNU Nettle is free software: you can redistribute it and/or |
10 | modify it under the terms of either: |
11 | |
12 | * the GNU Lesser General Public License as published by the Free |
13 | Software Foundation; either version 3 of the License, or (at your |
14 | option) any later version. |
15 | |
16 | or |
17 | |
18 | * the GNU General Public License as published by the Free |
19 | Software Foundation; either version 2 of the License, or (at your |
20 | option) any later version. |
21 | |
22 | or both in parallel, as here. |
23 | |
24 | GNU Nettle is distributed in the hope that it will be useful, |
25 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
26 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
27 | General Public License for more details. |
28 | |
29 | You should have received copies of the GNU General Public License and |
30 | the GNU Lesser General Public License along with this program. If |
31 | not, see http://www.gnu.org/licenses/. |
32 | */ |
33 | |
34 | #ifndef NETTLE_CAST128_H_INCLUDED |
35 | #define NETTLE_CAST128_H_INCLUDED |
36 | |
37 | #include "nettle-types.h" |
38 | |
39 | #ifdef __cplusplus |
40 | extern "C" { |
41 | #endif |
42 | |
43 | /* Name mangling */ |
44 | #define cast5_set_key nettle_cast5_set_key |
45 | #define cast128_set_key nettle_cast128_set_key |
46 | #define cast128_encrypt nettle_cast128_encrypt |
47 | #define cast128_decrypt nettle_cast128_decrypt |
48 | |
49 | #define CAST128_BLOCK_SIZE 8 |
50 | |
51 | /* Variable key size between 40 and 128. */ |
52 | #define CAST5_MIN_KEY_SIZE 5 |
53 | #define CAST5_MAX_KEY_SIZE 16 |
54 | |
55 | #define CAST128_KEY_SIZE 16 |
56 | |
57 | struct cast128_ctx |
58 | { |
59 | unsigned rounds; /* Number of rounds to use, 12 or 16 */ |
60 | /* Expanded key, rotations (5 bits only) and 32-bit masks. */ |
61 | unsigned char Kr[16]; |
62 | uint32_t Km[16]; |
63 | }; |
64 | |
65 | /* Using variable key size. */ |
66 | void |
67 | cast5_set_key(struct cast128_ctx *ctx, |
68 | size_t length, const uint8_t *key); |
69 | |
70 | void |
71 | cast128_set_key(struct cast128_ctx *ctx, const uint8_t *key); |
72 | |
73 | void |
74 | cast128_encrypt(const struct cast128_ctx *ctx, |
75 | size_t length, uint8_t *dst, |
76 | const uint8_t *src); |
77 | void |
78 | cast128_decrypt(const struct cast128_ctx *ctx, |
79 | size_t length, uint8_t *dst, |
80 | const uint8_t *src); |
81 | |
82 | #ifdef __cplusplus |
83 | } |
84 | #endif |
85 | |
86 | #endif /* NETTLE_CAST128_H_INCLUDED */ |
87 | |