1 | /* cbc.h |
2 | |
3 | Cipher block chaining mode. |
4 | |
5 | Copyright (C) 2001 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_CBC_H_INCLUDED |
35 | #define NETTLE_CBC_H_INCLUDED |
36 | |
37 | #include "nettle-types.h" |
38 | |
39 | #ifdef __cplusplus |
40 | extern "C" { |
41 | #endif |
42 | |
43 | /* Name mangling */ |
44 | #define cbc_encrypt nettle_cbc_encrypt |
45 | #define cbc_decrypt nettle_cbc_decrypt |
46 | |
47 | void |
48 | cbc_encrypt(const void *ctx, nettle_cipher_func *f, |
49 | size_t block_size, uint8_t *iv, |
50 | size_t length, uint8_t *dst, |
51 | const uint8_t *src); |
52 | |
53 | void |
54 | cbc_decrypt(const void *ctx, nettle_cipher_func *f, |
55 | size_t block_size, uint8_t *iv, |
56 | size_t length, uint8_t *dst, |
57 | const uint8_t *src); |
58 | |
59 | #define CBC_CTX(type, size) \ |
60 | { type ctx; uint8_t iv[size]; } |
61 | |
62 | #define CBC_SET_IV(ctx, data) \ |
63 | memcpy((ctx)->iv, (data), sizeof((ctx)->iv)) |
64 | |
65 | /* NOTE: Avoid using NULL, as we don't include anything defining it. */ |
66 | #define CBC_ENCRYPT(self, f, length, dst, src) \ |
67 | (0 ? ((f)(&(self)->ctx, ~(size_t) 0, \ |
68 | (uint8_t *) 0, (const uint8_t *) 0)) \ |
69 | : cbc_encrypt((void *) &(self)->ctx, \ |
70 | (nettle_cipher_func *) (f), \ |
71 | sizeof((self)->iv), (self)->iv, \ |
72 | (length), (dst), (src))) |
73 | |
74 | #define CBC_DECRYPT(self, f, length, dst, src) \ |
75 | (0 ? ((f)(&(self)->ctx, ~(size_t) 0, \ |
76 | (uint8_t *) 0, (const uint8_t *) 0)) \ |
77 | : cbc_decrypt((void *) &(self)->ctx, \ |
78 | (nettle_cipher_func *) (f), \ |
79 | sizeof((self)->iv), (self)->iv, \ |
80 | (length), (dst), (src))) |
81 | |
82 | #ifdef __cplusplus |
83 | } |
84 | #endif |
85 | |
86 | #endif /* NETTLE_CBC_H_INCLUDED */ |
87 | |