diff options
author | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2008-07-11 15:50:46 +0000 |
---|---|---|
committer | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2008-07-11 15:50:46 +0000 |
commit | 14c7f45cdae826f88dc539c8c38dd95caf305731 (patch) | |
tree | 832da054b7cfb2dc6fd63339af736625f31d21aa /utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/hmac.c | |
parent | 7c84ede3781c27db73403bd6302f320c76a58c8c (diff) | |
download | rockbox-14c7f45cdae826f88dc539c8c38dd95caf305731.tar.gz rockbox-14c7f45cdae826f88dc539c8c38dd95caf305731.zip |
Add zook's ZenUtils to SVN
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18010 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/hmac.c')
-rwxr-xr-x | utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/hmac.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/hmac.c b/utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/hmac.c new file mode 100755 index 0000000000..c28770a05b --- /dev/null +++ b/utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/hmac.c | |||
@@ -0,0 +1,123 @@ | |||
1 | /* | ||
2 | * Copyright (c) 1999, 2000, 2002 Virtual Unlimited B.V. | ||
3 | * | ||
4 | * This library is free software; you can redistribute it and/or | ||
5 | * modify it under the terms of the GNU Lesser General Public | ||
6 | * License as published by the Free Software Foundation; either | ||
7 | * version 2.1 of the License, or (at your option) any later version. | ||
8 | * | ||
9 | * This library is distributed in the hope that it will be useful, | ||
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
12 | * Lesser General Public License for more details. | ||
13 | * | ||
14 | * You should have received a copy of the GNU Lesser General Public | ||
15 | * License along with this library; if not, write to the Free Software | ||
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
17 | * | ||
18 | */ | ||
19 | |||
20 | /*!\file hmac.c | ||
21 | * \brief HMAC algorithm. | ||
22 | * | ||
23 | * \see RFC2104 HMAC: Keyed-Hashing for Message Authentication. | ||
24 | * H. Krawczyk, M. Bellare, R. Canetti. | ||
25 | * | ||
26 | * \author Bob Deblier <bob.deblier@pandore.be> | ||
27 | * \ingroup HMAC_m | ||
28 | */ | ||
29 | |||
30 | #define BEECRYPT_DLL_EXPORT | ||
31 | |||
32 | #if HAVE_CONFIG_H | ||
33 | # include "config.h" | ||
34 | #endif | ||
35 | |||
36 | #include "beecrypt/hmac.h" | ||
37 | #include "beecrypt/endianness.h" | ||
38 | |||
39 | /*!\addtogroup HMAC_m | ||
40 | * \{ | ||
41 | */ | ||
42 | |||
43 | #define HMAC_IPAD 0x36 | ||
44 | #define HMAC_OPAD 0x5c | ||
45 | |||
46 | int hmacSetup(byte* kxi, byte* kxo, const hashFunction* hash, hashFunctionParam* param, const byte* key, size_t keybits) | ||
47 | { | ||
48 | register unsigned int i; | ||
49 | |||
50 | size_t keybytes = keybits >> 3; | ||
51 | |||
52 | /* if the key is too large, hash it first */ | ||
53 | if (keybytes > hash->blocksize) | ||
54 | { | ||
55 | /* if the hash digest is too large, this doesn't help; this is really a sanity check */ | ||
56 | if (hash->digestsize > hash->blocksize) | ||
57 | return -1; | ||
58 | |||
59 | if (hash->reset(param)) | ||
60 | return -1; | ||
61 | |||
62 | if (hash->update(param, key, keybytes)) | ||
63 | return -1; | ||
64 | |||
65 | if (hash->digest(param, kxi)) | ||
66 | return -1; | ||
67 | |||
68 | memcpy(kxo, kxi, keybytes = hash->digestsize); | ||
69 | } | ||
70 | else if (keybytes > 0) | ||
71 | { | ||
72 | memcpy(kxi, key, keybytes); | ||
73 | memcpy(kxo, key, keybytes); | ||
74 | } | ||
75 | else | ||
76 | return -1; | ||
77 | |||
78 | for (i = 0; i < keybytes; i++) | ||
79 | { | ||
80 | kxi[i] ^= HMAC_IPAD; | ||
81 | kxo[i] ^= HMAC_OPAD; | ||
82 | } | ||
83 | |||
84 | for (i = keybytes; i < hash->blocksize; i++) | ||
85 | { | ||
86 | kxi[i] = HMAC_IPAD; | ||
87 | kxo[i] = HMAC_OPAD; | ||
88 | } | ||
89 | |||
90 | return hmacReset(kxi, hash, param); | ||
91 | } | ||
92 | |||
93 | int hmacReset(const byte* kxi, const hashFunction* hash, hashFunctionParam* param) | ||
94 | { | ||
95 | if (hash->reset(param)) | ||
96 | return -1; | ||
97 | if (hash->update(param, kxi, hash->blocksize)) | ||
98 | return -1; | ||
99 | |||
100 | return 0; | ||
101 | } | ||
102 | |||
103 | int hmacUpdate(const hashFunction* hash, hashFunctionParam* param, const byte* data, size_t size) | ||
104 | { | ||
105 | return hash->update(param, data, size); | ||
106 | } | ||
107 | |||
108 | int hmacDigest(const byte* kxo, const hashFunction* hash, hashFunctionParam* param, byte* data) | ||
109 | { | ||
110 | if (hash->digest(param, data)) | ||
111 | return -1; | ||
112 | if (hash->update(param, kxo, hash->blocksize)) | ||
113 | return -1; | ||
114 | if (hash->update(param, data, hash->digestsize)) | ||
115 | return -1; | ||
116 | if (hash->digest(param, data)) | ||
117 | return -1; | ||
118 | |||
119 | return 0; | ||
120 | } | ||
121 | |||
122 | /*!\} | ||
123 | */ | ||