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author | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2008-07-11 15:50:46 +0000 |
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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/blockmode.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/blockmode.c')
-rwxr-xr-x | utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/blockmode.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/blockmode.c b/utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/blockmode.c new file mode 100755 index 0000000000..cfccd43337 --- /dev/null +++ b/utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/blockmode.c | |||
@@ -0,0 +1,137 @@ | |||
1 | /* | ||
2 | * Copyright (c) 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 blockmode.c | ||
21 | * \brief Blockcipher operation modes. | ||
22 | * \author Bob Deblier <bob.deblier@pandora.be> | ||
23 | * \ingroup BC_m | ||
24 | */ | ||
25 | |||
26 | #define BEECRYPT_DLL_EXPORT | ||
27 | |||
28 | #if HAVE_CONFIG_H | ||
29 | # include "config.h" | ||
30 | #endif | ||
31 | |||
32 | #include "beecrypt/blockmode.h" | ||
33 | |||
34 | int blockEncryptECB(const blockCipher* bc, blockCipherParam* bp, uint32_t* dst, const uint32_t* src, unsigned int nblocks) | ||
35 | { | ||
36 | register const unsigned int blockwords = bc->blocksize >> 2; | ||
37 | |||
38 | while (nblocks > 0) | ||
39 | { | ||
40 | bc->raw.encrypt(bp, dst, src); | ||
41 | |||
42 | dst += blockwords; | ||
43 | src += blockwords; | ||
44 | |||
45 | nblocks--; | ||
46 | } | ||
47 | |||
48 | return 0; | ||
49 | } | ||
50 | |||
51 | int blockDecryptECB(const blockCipher* bc, blockCipherParam* bp, uint32_t* dst, const uint32_t* src, unsigned int nblocks) | ||
52 | { | ||
53 | register const unsigned int blockwords = bc->blocksize >> 2; | ||
54 | |||
55 | while (nblocks > 0) | ||
56 | { | ||
57 | bc->raw.decrypt(bp, dst, src); | ||
58 | |||
59 | dst += blockwords; | ||
60 | src += blockwords; | ||
61 | |||
62 | nblocks--; | ||
63 | } | ||
64 | |||
65 | return 0; | ||
66 | } | ||
67 | |||
68 | int blockEncryptCBC(const blockCipher* bc, blockCipherParam* bp, uint32_t* dst, const uint32_t* src, unsigned int nblocks) | ||
69 | { | ||
70 | register const unsigned int blockwords = bc->blocksize >> 2; | ||
71 | register uint32_t* fdback = bc->getfb(bp); | ||
72 | |||
73 | if (nblocks > 0) | ||
74 | { | ||
75 | register unsigned int i; | ||
76 | |||
77 | for (i = 0; i < blockwords; i++) | ||
78 | dst[i] = src[i] ^ fdback[i]; | ||
79 | |||
80 | bc->raw.encrypt(bp, dst, dst); | ||
81 | |||
82 | nblocks--; | ||
83 | |||
84 | while (nblocks > 0) | ||
85 | { | ||
86 | for (i = 0; i < blockwords; i++) | ||
87 | dst[i+blockwords] = src[i+blockwords] ^ dst[i]; | ||
88 | |||
89 | dst += blockwords; | ||
90 | |||
91 | bc->raw.encrypt(bp, dst, dst); | ||
92 | |||
93 | src += blockwords; | ||
94 | |||
95 | nblocks--; | ||
96 | } | ||
97 | |||
98 | for (i = 0; i < blockwords; i++) | ||
99 | fdback[i] = dst[i]; | ||
100 | } | ||
101 | |||
102 | return 0; | ||
103 | } | ||
104 | |||
105 | int blockDecryptCBC(const blockCipher* bc, blockCipherParam* bp, uint32_t* dst, const uint32_t* src, unsigned int nblocks) | ||
106 | { | ||
107 | register const unsigned int blockwords = bc->blocksize >> 2; | ||
108 | register uint32_t* fdback = bc->getfb(bp); | ||
109 | register uint32_t* buf = (uint32_t*) malloc(blockwords * sizeof(uint32_t)); | ||
110 | |||
111 | if (buf) | ||
112 | { | ||
113 | while (nblocks > 0) | ||
114 | { | ||
115 | register uint32_t tmp; | ||
116 | register unsigned int i; | ||
117 | |||
118 | bc->raw.decrypt(bp, buf, src); | ||
119 | |||
120 | for (i = 0; i < blockwords; i++) | ||
121 | { | ||
122 | tmp = src[i]; | ||
123 | dst[i] = buf[i] ^ fdback[i]; | ||
124 | fdback[i] = tmp; | ||
125 | } | ||
126 | |||
127 | dst += blockwords; | ||
128 | src += blockwords; | ||
129 | |||
130 | nblocks--; | ||
131 | } | ||
132 | free(buf); | ||
133 | return 0; | ||
134 | } | ||
135 | |||
136 | return -1; | ||
137 | } | ||