tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Cryptographic API.
3 *
4 * Partial (de)compression operations.
5 *
6 * Copyright 2008 Sony Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program.
19 * If not, see <http://www.gnu.org/licenses/>.
20 */
21
22#include <linux/crypto.h>
23#include <linux/errno.h>
24#include <linux/module.h>
25#include <linux/seq_file.h>
26#include <linux/string.h>
27
28#include <crypto/compress.h>
29
30#include "internal.h"
31
32
33static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask)
34{
35 return 0;
36}
37
38static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg,
39 const struct crypto_type *frontend)
40{
41 return alg->cra_ctxsize;
42}
43
44static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm,
45 const struct crypto_type *frontend)
46{
47 return 0;
48}
49
50static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
51 __attribute__ ((unused));
52static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
53{
54 seq_printf(m, "type : pcomp\n");
55}
56
57static const struct crypto_type crypto_pcomp_type = {
58 .extsize = crypto_pcomp_extsize,
59 .init = crypto_pcomp_init,
60 .init_tfm = crypto_pcomp_init_tfm,
61#ifdef CONFIG_PROC_FS
62 .show = crypto_pcomp_show,
63#endif
64 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
65 .maskset = CRYPTO_ALG_TYPE_MASK,
66 .type = CRYPTO_ALG_TYPE_PCOMPRESS,
67 .tfmsize = offsetof(struct crypto_pcomp, base),
68};
69
70struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
71 u32 mask)
72{
73 return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask);
74}
75EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);
76
77int crypto_register_pcomp(struct pcomp_alg *alg)
78{
79 struct crypto_alg *base = &alg->base;
80
81 base->cra_type = &crypto_pcomp_type;
82 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
83 base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS;
84
85 return crypto_register_alg(base);
86}
87EXPORT_SYMBOL_GPL(crypto_register_pcomp);
88
89int crypto_unregister_pcomp(struct pcomp_alg *alg)
90{
91 return crypto_unregister_alg(&alg->base);
92}
93EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);
94
95MODULE_LICENSE("GPL");
96MODULE_DESCRIPTION("Partial (de)compression type");
97MODULE_AUTHOR("Sony Corporation");